| /* Array translation routines |
| Copyright (C) 2002-2018 Free Software Foundation, Inc. |
| Contributed by Paul Brook <paul@nowt.org> |
| and Steven Bosscher <s.bosscher@student.tudelft.nl> |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* trans-array.c-- Various array related code, including scalarization, |
| allocation, initialization and other support routines. */ |
| |
| /* How the scalarizer works. |
| In gfortran, array expressions use the same core routines as scalar |
| expressions. |
| First, a Scalarization State (SS) chain is built. This is done by walking |
| the expression tree, and building a linear list of the terms in the |
| expression. As the tree is walked, scalar subexpressions are translated. |
| |
| The scalarization parameters are stored in a gfc_loopinfo structure. |
| First the start and stride of each term is calculated by |
| gfc_conv_ss_startstride. During this process the expressions for the array |
| descriptors and data pointers are also translated. |
| |
| If the expression is an assignment, we must then resolve any dependencies. |
| In Fortran all the rhs values of an assignment must be evaluated before |
| any assignments take place. This can require a temporary array to store the |
| values. We also require a temporary when we are passing array expressions |
| or vector subscripts as procedure parameters. |
| |
| Array sections are passed without copying to a temporary. These use the |
| scalarizer to determine the shape of the section. The flag |
| loop->array_parameter tells the scalarizer that the actual values and loop |
| variables will not be required. |
| |
| The function gfc_conv_loop_setup generates the scalarization setup code. |
| It determines the range of the scalarizing loop variables. If a temporary |
| is required, this is created and initialized. Code for scalar expressions |
| taken outside the loop is also generated at this time. Next the offset and |
| scaling required to translate from loop variables to array indices for each |
| term is calculated. |
| |
| A call to gfc_start_scalarized_body marks the start of the scalarized |
| expression. This creates a scope and declares the loop variables. Before |
| calling this gfc_make_ss_chain_used must be used to indicate which terms |
| will be used inside this loop. |
| |
| The scalar gfc_conv_* functions are then used to build the main body of the |
| scalarization loop. Scalarization loop variables and precalculated scalar |
| values are automatically substituted. Note that gfc_advance_se_ss_chain |
| must be used, rather than changing the se->ss directly. |
| |
| For assignment expressions requiring a temporary two sub loops are |
| generated. The first stores the result of the expression in the temporary, |
| the second copies it to the result. A call to |
| gfc_trans_scalarized_loop_boundary marks the end of the main loop code and |
| the start of the copying loop. The temporary may be less than full rank. |
| |
| Finally gfc_trans_scalarizing_loops is called to generate the implicit do |
| loops. The loops are added to the pre chain of the loopinfo. The post |
| chain may still contain cleanup code. |
| |
| After the loop code has been added into its parent scope gfc_cleanup_loop |
| is called to free all the SS allocated by the scalarizer. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "options.h" |
| #include "tree.h" |
| #include "gfortran.h" |
| #include "gimple-expr.h" |
| #include "trans.h" |
| #include "fold-const.h" |
| #include "constructor.h" |
| #include "trans-types.h" |
| #include "trans-array.h" |
| #include "trans-const.h" |
| #include "dependency.h" |
| |
| static bool gfc_get_array_constructor_size (mpz_t *, gfc_constructor_base); |
| |
| /* The contents of this structure aren't actually used, just the address. */ |
| static gfc_ss gfc_ss_terminator_var; |
| gfc_ss * const gfc_ss_terminator = &gfc_ss_terminator_var; |
| |
| |
| static tree |
| gfc_array_dataptr_type (tree desc) |
| { |
| return (GFC_TYPE_ARRAY_DATAPTR_TYPE (TREE_TYPE (desc))); |
| } |
| |
| |
| /* Build expressions to access the members of an array descriptor. |
| It's surprisingly easy to mess up here, so never access |
| an array descriptor by "brute force", always use these |
| functions. This also avoids problems if we change the format |
| of an array descriptor. |
| |
| To understand these magic numbers, look at the comments |
| before gfc_build_array_type() in trans-types.c. |
| |
| The code within these defines should be the only code which knows the format |
| of an array descriptor. |
| |
| Any code just needing to read obtain the bounds of an array should use |
| gfc_conv_array_* rather than the following functions as these will return |
| know constant values, and work with arrays which do not have descriptors. |
| |
| Don't forget to #undef these! */ |
| |
| #define DATA_FIELD 0 |
| #define OFFSET_FIELD 1 |
| #define DTYPE_FIELD 2 |
| #define SPAN_FIELD 3 |
| #define DIMENSION_FIELD 4 |
| #define CAF_TOKEN_FIELD 5 |
| |
| #define STRIDE_SUBFIELD 0 |
| #define LBOUND_SUBFIELD 1 |
| #define UBOUND_SUBFIELD 2 |
| |
| /* This provides READ-ONLY access to the data field. The field itself |
| doesn't have the proper type. */ |
| |
| tree |
| gfc_conv_descriptor_data_get (tree desc) |
| { |
| tree field, type, t; |
| |
| type = TREE_TYPE (desc); |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (type)); |
| |
| field = TYPE_FIELDS (type); |
| gcc_assert (DATA_FIELD == 0); |
| |
| t = fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), desc, |
| field, NULL_TREE); |
| t = fold_convert (GFC_TYPE_ARRAY_DATAPTR_TYPE (type), t); |
| |
| return t; |
| } |
| |
| /* This provides WRITE access to the data field. |
| |
| TUPLES_P is true if we are generating tuples. |
| |
| This function gets called through the following macros: |
| gfc_conv_descriptor_data_set |
| gfc_conv_descriptor_data_set. */ |
| |
| void |
| gfc_conv_descriptor_data_set (stmtblock_t *block, tree desc, tree value) |
| { |
| tree field, type, t; |
| |
| type = TREE_TYPE (desc); |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (type)); |
| |
| field = TYPE_FIELDS (type); |
| gcc_assert (DATA_FIELD == 0); |
| |
| t = fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), desc, |
| field, NULL_TREE); |
| gfc_add_modify (block, t, fold_convert (TREE_TYPE (field), value)); |
| } |
| |
| |
| /* This provides address access to the data field. This should only be |
| used by array allocation, passing this on to the runtime. */ |
| |
| tree |
| gfc_conv_descriptor_data_addr (tree desc) |
| { |
| tree field, type, t; |
| |
| type = TREE_TYPE (desc); |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (type)); |
| |
| field = TYPE_FIELDS (type); |
| gcc_assert (DATA_FIELD == 0); |
| |
| t = fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), desc, |
| field, NULL_TREE); |
| return gfc_build_addr_expr (NULL_TREE, t); |
| } |
| |
| static tree |
| gfc_conv_descriptor_offset (tree desc) |
| { |
| tree type; |
| tree field; |
| |
| type = TREE_TYPE (desc); |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (type)); |
| |
| field = gfc_advance_chain (TYPE_FIELDS (type), OFFSET_FIELD); |
| gcc_assert (field != NULL_TREE && TREE_TYPE (field) == gfc_array_index_type); |
| |
| return fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), |
| desc, field, NULL_TREE); |
| } |
| |
| tree |
| gfc_conv_descriptor_offset_get (tree desc) |
| { |
| return gfc_conv_descriptor_offset (desc); |
| } |
| |
| void |
| gfc_conv_descriptor_offset_set (stmtblock_t *block, tree desc, |
| tree value) |
| { |
| tree t = gfc_conv_descriptor_offset (desc); |
| gfc_add_modify (block, t, fold_convert (TREE_TYPE (t), value)); |
| } |
| |
| |
| tree |
| gfc_conv_descriptor_dtype (tree desc) |
| { |
| tree field; |
| tree type; |
| |
| type = TREE_TYPE (desc); |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (type)); |
| |
| field = gfc_advance_chain (TYPE_FIELDS (type), DTYPE_FIELD); |
| gcc_assert (field != NULL_TREE |
| && TREE_TYPE (field) == get_dtype_type_node ()); |
| |
| return fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), |
| desc, field, NULL_TREE); |
| } |
| |
| static tree |
| gfc_conv_descriptor_span (tree desc) |
| { |
| tree type; |
| tree field; |
| |
| type = TREE_TYPE (desc); |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (type)); |
| |
| field = gfc_advance_chain (TYPE_FIELDS (type), SPAN_FIELD); |
| gcc_assert (field != NULL_TREE && TREE_TYPE (field) == gfc_array_index_type); |
| |
| return fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), |
| desc, field, NULL_TREE); |
| } |
| |
| tree |
| gfc_conv_descriptor_span_get (tree desc) |
| { |
| return gfc_conv_descriptor_span (desc); |
| } |
| |
| void |
| gfc_conv_descriptor_span_set (stmtblock_t *block, tree desc, |
| tree value) |
| { |
| tree t = gfc_conv_descriptor_span (desc); |
| gfc_add_modify (block, t, fold_convert (TREE_TYPE (t), value)); |
| } |
| |
| |
| tree |
| gfc_conv_descriptor_rank (tree desc) |
| { |
| tree tmp; |
| tree dtype; |
| |
| dtype = gfc_conv_descriptor_dtype (desc); |
| tmp = gfc_advance_chain (TYPE_FIELDS (TREE_TYPE (dtype)), GFC_DTYPE_RANK); |
| gcc_assert (tmp!= NULL_TREE |
| && TREE_TYPE (tmp) == signed_char_type_node); |
| return fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (tmp), |
| dtype, tmp, NULL_TREE); |
| } |
| |
| |
| tree |
| gfc_get_descriptor_dimension (tree desc) |
| { |
| tree type, field; |
| |
| type = TREE_TYPE (desc); |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (type)); |
| |
| field = gfc_advance_chain (TYPE_FIELDS (type), DIMENSION_FIELD); |
| gcc_assert (field != NULL_TREE |
| && TREE_CODE (TREE_TYPE (field)) == ARRAY_TYPE |
| && TREE_CODE (TREE_TYPE (TREE_TYPE (field))) == RECORD_TYPE); |
| |
| return fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), |
| desc, field, NULL_TREE); |
| } |
| |
| |
| static tree |
| gfc_conv_descriptor_dimension (tree desc, tree dim) |
| { |
| tree tmp; |
| |
| tmp = gfc_get_descriptor_dimension (desc); |
| |
| return gfc_build_array_ref (tmp, dim, NULL); |
| } |
| |
| |
| tree |
| gfc_conv_descriptor_token (tree desc) |
| { |
| tree type; |
| tree field; |
| |
| type = TREE_TYPE (desc); |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (type)); |
| gcc_assert (flag_coarray == GFC_FCOARRAY_LIB); |
| field = gfc_advance_chain (TYPE_FIELDS (type), CAF_TOKEN_FIELD); |
| |
| /* Should be a restricted pointer - except in the finalization wrapper. */ |
| gcc_assert (field != NULL_TREE |
| && (TREE_TYPE (field) == prvoid_type_node |
| || TREE_TYPE (field) == pvoid_type_node)); |
| |
| return fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), |
| desc, field, NULL_TREE); |
| } |
| |
| |
| static tree |
| gfc_conv_descriptor_stride (tree desc, tree dim) |
| { |
| tree tmp; |
| tree field; |
| |
| tmp = gfc_conv_descriptor_dimension (desc, dim); |
| field = TYPE_FIELDS (TREE_TYPE (tmp)); |
| field = gfc_advance_chain (field, STRIDE_SUBFIELD); |
| gcc_assert (field != NULL_TREE && TREE_TYPE (field) == gfc_array_index_type); |
| |
| tmp = fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), |
| tmp, field, NULL_TREE); |
| return tmp; |
| } |
| |
| tree |
| gfc_conv_descriptor_stride_get (tree desc, tree dim) |
| { |
| tree type = TREE_TYPE (desc); |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (type)); |
| if (integer_zerop (dim) |
| && (GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ALLOCATABLE |
| ||GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ASSUMED_SHAPE_CONT |
| ||GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_ASSUMED_RANK_CONT |
| ||GFC_TYPE_ARRAY_AKIND (type) == GFC_ARRAY_POINTER_CONT)) |
| return gfc_index_one_node; |
| |
| return gfc_conv_descriptor_stride (desc, dim); |
| } |
| |
| void |
| gfc_conv_descriptor_stride_set (stmtblock_t *block, tree desc, |
| tree dim, tree value) |
| { |
| tree t = gfc_conv_descriptor_stride (desc, dim); |
| gfc_add_modify (block, t, fold_convert (TREE_TYPE (t), value)); |
| } |
| |
| static tree |
| gfc_conv_descriptor_lbound (tree desc, tree dim) |
| { |
| tree tmp; |
| tree field; |
| |
| tmp = gfc_conv_descriptor_dimension (desc, dim); |
| field = TYPE_FIELDS (TREE_TYPE (tmp)); |
| field = gfc_advance_chain (field, LBOUND_SUBFIELD); |
| gcc_assert (field != NULL_TREE && TREE_TYPE (field) == gfc_array_index_type); |
| |
| tmp = fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), |
| tmp, field, NULL_TREE); |
| return tmp; |
| } |
| |
| tree |
| gfc_conv_descriptor_lbound_get (tree desc, tree dim) |
| { |
| return gfc_conv_descriptor_lbound (desc, dim); |
| } |
| |
| void |
| gfc_conv_descriptor_lbound_set (stmtblock_t *block, tree desc, |
| tree dim, tree value) |
| { |
| tree t = gfc_conv_descriptor_lbound (desc, dim); |
| gfc_add_modify (block, t, fold_convert (TREE_TYPE (t), value)); |
| } |
| |
| static tree |
| gfc_conv_descriptor_ubound (tree desc, tree dim) |
| { |
| tree tmp; |
| tree field; |
| |
| tmp = gfc_conv_descriptor_dimension (desc, dim); |
| field = TYPE_FIELDS (TREE_TYPE (tmp)); |
| field = gfc_advance_chain (field, UBOUND_SUBFIELD); |
| gcc_assert (field != NULL_TREE && TREE_TYPE (field) == gfc_array_index_type); |
| |
| tmp = fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), |
| tmp, field, NULL_TREE); |
| return tmp; |
| } |
| |
| tree |
| gfc_conv_descriptor_ubound_get (tree desc, tree dim) |
| { |
| return gfc_conv_descriptor_ubound (desc, dim); |
| } |
| |
| void |
| gfc_conv_descriptor_ubound_set (stmtblock_t *block, tree desc, |
| tree dim, tree value) |
| { |
| tree t = gfc_conv_descriptor_ubound (desc, dim); |
| gfc_add_modify (block, t, fold_convert (TREE_TYPE (t), value)); |
| } |
| |
| /* Build a null array descriptor constructor. */ |
| |
| tree |
| gfc_build_null_descriptor (tree type) |
| { |
| tree field; |
| tree tmp; |
| |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (type)); |
| gcc_assert (DATA_FIELD == 0); |
| field = TYPE_FIELDS (type); |
| |
| /* Set a NULL data pointer. */ |
| tmp = build_constructor_single (type, field, null_pointer_node); |
| TREE_CONSTANT (tmp) = 1; |
| /* All other fields are ignored. */ |
| |
| return tmp; |
| } |
| |
| |
| /* Modify a descriptor such that the lbound of a given dimension is the value |
| specified. This also updates ubound and offset accordingly. */ |
| |
| void |
| gfc_conv_shift_descriptor_lbound (stmtblock_t* block, tree desc, |
| int dim, tree new_lbound) |
| { |
| tree offs, ubound, lbound, stride; |
| tree diff, offs_diff; |
| |
| new_lbound = fold_convert (gfc_array_index_type, new_lbound); |
| |
| offs = gfc_conv_descriptor_offset_get (desc); |
| lbound = gfc_conv_descriptor_lbound_get (desc, gfc_rank_cst[dim]); |
| ubound = gfc_conv_descriptor_ubound_get (desc, gfc_rank_cst[dim]); |
| stride = gfc_conv_descriptor_stride_get (desc, gfc_rank_cst[dim]); |
| |
| /* Get difference (new - old) by which to shift stuff. */ |
| diff = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type, |
| new_lbound, lbound); |
| |
| /* Shift ubound and offset accordingly. This has to be done before |
| updating the lbound, as they depend on the lbound expression! */ |
| ubound = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type, |
| ubound, diff); |
| gfc_conv_descriptor_ubound_set (block, desc, gfc_rank_cst[dim], ubound); |
| offs_diff = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type, |
| diff, stride); |
| offs = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type, |
| offs, offs_diff); |
| gfc_conv_descriptor_offset_set (block, desc, offs); |
| |
| /* Finally set lbound to value we want. */ |
| gfc_conv_descriptor_lbound_set (block, desc, gfc_rank_cst[dim], new_lbound); |
| } |
| |
| |
| /* Obtain offsets for trans-types.c(gfc_get_array_descr_info). */ |
| |
| void |
| gfc_get_descriptor_offsets_for_info (const_tree desc_type, tree *data_off, |
| tree *dtype_off, tree *dim_off, |
| tree *dim_size, tree *stride_suboff, |
| tree *lower_suboff, tree *upper_suboff) |
| { |
| tree field; |
| tree type; |
| |
| type = TYPE_MAIN_VARIANT (desc_type); |
| field = gfc_advance_chain (TYPE_FIELDS (type), DATA_FIELD); |
| *data_off = byte_position (field); |
| field = gfc_advance_chain (TYPE_FIELDS (type), DTYPE_FIELD); |
| *dtype_off = byte_position (field); |
| field = gfc_advance_chain (TYPE_FIELDS (type), DIMENSION_FIELD); |
| *dim_off = byte_position (field); |
| type = TREE_TYPE (TREE_TYPE (field)); |
| *dim_size = TYPE_SIZE_UNIT (type); |
| field = gfc_advance_chain (TYPE_FIELDS (type), STRIDE_SUBFIELD); |
| *stride_suboff = byte_position (field); |
| field = gfc_advance_chain (TYPE_FIELDS (type), LBOUND_SUBFIELD); |
| *lower_suboff = byte_position (field); |
| field = gfc_advance_chain (TYPE_FIELDS (type), UBOUND_SUBFIELD); |
| *upper_suboff = byte_position (field); |
| } |
| |
| |
| /* Cleanup those #defines. */ |
| |
| #undef DATA_FIELD |
| #undef OFFSET_FIELD |
| #undef DTYPE_FIELD |
| #undef SPAN_FIELD |
| #undef DIMENSION_FIELD |
| #undef CAF_TOKEN_FIELD |
| #undef STRIDE_SUBFIELD |
| #undef LBOUND_SUBFIELD |
| #undef UBOUND_SUBFIELD |
| |
| |
| /* Mark a SS chain as used. Flags specifies in which loops the SS is used. |
| flags & 1 = Main loop body. |
| flags & 2 = temp copy loop. */ |
| |
| void |
| gfc_mark_ss_chain_used (gfc_ss * ss, unsigned flags) |
| { |
| for (; ss != gfc_ss_terminator; ss = ss->next) |
| ss->info->useflags = flags; |
| } |
| |
| |
| /* Free a gfc_ss chain. */ |
| |
| void |
| gfc_free_ss_chain (gfc_ss * ss) |
| { |
| gfc_ss *next; |
| |
| while (ss != gfc_ss_terminator) |
| { |
| gcc_assert (ss != NULL); |
| next = ss->next; |
| gfc_free_ss (ss); |
| ss = next; |
| } |
| } |
| |
| |
| static void |
| free_ss_info (gfc_ss_info *ss_info) |
| { |
| int n; |
| |
| ss_info->refcount--; |
| if (ss_info->refcount > 0) |
| return; |
| |
| gcc_assert (ss_info->refcount == 0); |
| |
| switch (ss_info->type) |
| { |
| case GFC_SS_SECTION: |
| for (n = 0; n < GFC_MAX_DIMENSIONS; n++) |
| if (ss_info->data.array.subscript[n]) |
| gfc_free_ss_chain (ss_info->data.array.subscript[n]); |
| break; |
| |
| default: |
| break; |
| } |
| |
| free (ss_info); |
| } |
| |
| |
| /* Free a SS. */ |
| |
| void |
| gfc_free_ss (gfc_ss * ss) |
| { |
| free_ss_info (ss->info); |
| free (ss); |
| } |
| |
| |
| /* Creates and initializes an array type gfc_ss struct. */ |
| |
| gfc_ss * |
| gfc_get_array_ss (gfc_ss *next, gfc_expr *expr, int dimen, gfc_ss_type type) |
| { |
| gfc_ss *ss; |
| gfc_ss_info *ss_info; |
| int i; |
| |
| ss_info = gfc_get_ss_info (); |
| ss_info->refcount++; |
| ss_info->type = type; |
| ss_info->expr = expr; |
| |
| ss = gfc_get_ss (); |
| ss->info = ss_info; |
| ss->next = next; |
| ss->dimen = dimen; |
| for (i = 0; i < ss->dimen; i++) |
| ss->dim[i] = i; |
| |
| return ss; |
| } |
| |
| |
| /* Creates and initializes a temporary type gfc_ss struct. */ |
| |
| gfc_ss * |
| gfc_get_temp_ss (tree type, tree string_length, int dimen) |
| { |
| gfc_ss *ss; |
| gfc_ss_info *ss_info; |
| int i; |
| |
| ss_info = gfc_get_ss_info (); |
| ss_info->refcount++; |
| ss_info->type = GFC_SS_TEMP; |
| ss_info->string_length = string_length; |
| ss_info->data.temp.type = type; |
| |
| ss = gfc_get_ss (); |
| ss->info = ss_info; |
| ss->next = gfc_ss_terminator; |
| ss->dimen = dimen; |
| for (i = 0; i < ss->dimen; i++) |
| ss->dim[i] = i; |
| |
| return ss; |
| } |
| |
| |
| /* Creates and initializes a scalar type gfc_ss struct. */ |
| |
| gfc_ss * |
| gfc_get_scalar_ss (gfc_ss *next, gfc_expr *expr) |
| { |
| gfc_ss *ss; |
| gfc_ss_info *ss_info; |
| |
| ss_info = gfc_get_ss_info (); |
| ss_info->refcount++; |
| ss_info->type = GFC_SS_SCALAR; |
| ss_info->expr = expr; |
| |
| ss = gfc_get_ss (); |
| ss->info = ss_info; |
| ss->next = next; |
| |
| return ss; |
| } |
| |
| |
| /* Free all the SS associated with a loop. */ |
| |
| void |
| gfc_cleanup_loop (gfc_loopinfo * loop) |
| { |
| gfc_loopinfo *loop_next, **ploop; |
| gfc_ss *ss; |
| gfc_ss *next; |
| |
| ss = loop->ss; |
| while (ss != gfc_ss_terminator) |
| { |
| gcc_assert (ss != NULL); |
| next = ss->loop_chain; |
| gfc_free_ss (ss); |
| ss = next; |
| } |
| |
| /* Remove reference to self in the parent loop. */ |
| if (loop->parent) |
| for (ploop = &loop->parent->nested; *ploop; ploop = &(*ploop)->next) |
| if (*ploop == loop) |
| { |
| *ploop = loop->next; |
| break; |
| } |
| |
| /* Free non-freed nested loops. */ |
| for (loop = loop->nested; loop; loop = loop_next) |
| { |
| loop_next = loop->next; |
| gfc_cleanup_loop (loop); |
| free (loop); |
| } |
| } |
| |
| |
| static void |
| set_ss_loop (gfc_ss *ss, gfc_loopinfo *loop) |
| { |
| int n; |
| |
| for (; ss != gfc_ss_terminator; ss = ss->next) |
| { |
| ss->loop = loop; |
| |
| if (ss->info->type == GFC_SS_SCALAR |
| || ss->info->type == GFC_SS_REFERENCE |
| || ss->info->type == GFC_SS_TEMP) |
| continue; |
| |
| for (n = 0; n < GFC_MAX_DIMENSIONS; n++) |
| if (ss->info->data.array.subscript[n] != NULL) |
| set_ss_loop (ss->info->data.array.subscript[n], loop); |
| } |
| } |
| |
| |
| /* Associate a SS chain with a loop. */ |
| |
| void |
| gfc_add_ss_to_loop (gfc_loopinfo * loop, gfc_ss * head) |
| { |
| gfc_ss *ss; |
| gfc_loopinfo *nested_loop; |
| |
| if (head == gfc_ss_terminator) |
| return; |
| |
| set_ss_loop (head, loop); |
| |
| ss = head; |
| for (; ss && ss != gfc_ss_terminator; ss = ss->next) |
| { |
| if (ss->nested_ss) |
| { |
| nested_loop = ss->nested_ss->loop; |
| |
| /* More than one ss can belong to the same loop. Hence, we add the |
| loop to the chain only if it is different from the previously |
| added one, to avoid duplicate nested loops. */ |
| if (nested_loop != loop->nested) |
| { |
| gcc_assert (nested_loop->parent == NULL); |
| nested_loop->parent = loop; |
| |
| gcc_assert (nested_loop->next == NULL); |
| nested_loop->next = loop->nested; |
| loop->nested = nested_loop; |
| } |
| else |
| gcc_assert (nested_loop->parent == loop); |
| } |
| |
| if (ss->next == gfc_ss_terminator) |
| ss->loop_chain = loop->ss; |
| else |
| ss->loop_chain = ss->next; |
| } |
| gcc_assert (ss == gfc_ss_terminator); |
| loop->ss = head; |
| } |
| |
| |
| /* Returns true if the expression is an array pointer. */ |
| |
| static bool |
| is_pointer_array (tree expr) |
| { |
| if (expr == NULL_TREE |
| || !GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (expr)) |
| || GFC_CLASS_TYPE_P (TREE_TYPE (expr))) |
| return false; |
| |
| if (TREE_CODE (expr) == VAR_DECL |
| && GFC_DECL_PTR_ARRAY_P (expr)) |
| return true; |
| |
| if (TREE_CODE (expr) == PARM_DECL |
| && GFC_DECL_PTR_ARRAY_P (expr)) |
| return true; |
| |
| if (TREE_CODE (expr) == INDIRECT_REF |
| && GFC_DECL_PTR_ARRAY_P (TREE_OPERAND (expr, 0))) |
| return true; |
| |
| /* The field declaration is marked as an pointer array. */ |
| if (TREE_CODE (expr) == COMPONENT_REF |
| && GFC_DECL_PTR_ARRAY_P (TREE_OPERAND (expr, 1)) |
| && !GFC_CLASS_TYPE_P (TREE_TYPE (TREE_OPERAND (expr, 1)))) |
| return true; |
| |
| return false; |
| } |
| |
| |
| /* Return the span of an array. */ |
| |
| tree |
| gfc_get_array_span (tree desc, gfc_expr *expr) |
| { |
| tree tmp; |
| |
| if (is_pointer_array (desc)) |
| /* This will have the span field set. */ |
| tmp = gfc_conv_descriptor_span_get (desc); |
| else if (TREE_CODE (desc) == COMPONENT_REF |
| && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (desc)) |
| && GFC_CLASS_TYPE_P (TREE_TYPE (TREE_OPERAND (desc, 0)))) |
| { |
| /* The descriptor is a class _data field and so use the vtable |
| size for the receiving span field. */ |
| tmp = gfc_get_vptr_from_expr (desc); |
| tmp = gfc_vptr_size_get (tmp); |
| } |
| else if (expr && expr->expr_type == EXPR_VARIABLE |
| && expr->symtree->n.sym->ts.type == BT_CLASS |
| && expr->ref->type == REF_COMPONENT |
| && expr->ref->next->type == REF_ARRAY |
| && expr->ref->next->next == NULL |
| && CLASS_DATA (expr->symtree->n.sym)->attr.dimension) |
| { |
| /* Dummys come in sometimes with the descriptor detached from |
| the class field or declaration. */ |
| tmp = gfc_class_vptr_get (expr->symtree->n.sym->backend_decl); |
| tmp = gfc_vptr_size_get (tmp); |
| } |
| else |
| { |
| /* If none of the fancy stuff works, the span is the element |
| size of the array. */ |
| tmp = gfc_get_element_type (TREE_TYPE (desc)); |
| tmp = fold_convert (gfc_array_index_type, |
| size_in_bytes (tmp)); |
| } |
| return tmp; |
| } |
| |
| |
| /* Generate an initializer for a static pointer or allocatable array. */ |
| |
| void |
| gfc_trans_static_array_pointer (gfc_symbol * sym) |
| { |
| tree type; |
| |
| gcc_assert (TREE_STATIC (sym->backend_decl)); |
| /* Just zero the data member. */ |
| type = TREE_TYPE (sym->backend_decl); |
| DECL_INITIAL (sym->backend_decl) = gfc_build_null_descriptor (type); |
| } |
| |
| |
| /* If the bounds of SE's loop have not yet been set, see if they can be |
| determined from array spec AS, which is the array spec of a called |
| function. MAPPING maps the callee's dummy arguments to the values |
| that the caller is passing. Add any initialization and finalization |
| code to SE. */ |
| |
| void |
| gfc_set_loop_bounds_from_array_spec (gfc_interface_mapping * mapping, |
| gfc_se * se, gfc_array_spec * as) |
| { |
| int n, dim, total_dim; |
| gfc_se tmpse; |
| gfc_ss *ss; |
| tree lower; |
| tree upper; |
| tree tmp; |
| |
| total_dim = 0; |
| |
| if (!as || as->type != AS_EXPLICIT) |
| return; |
| |
| for (ss = se->ss; ss; ss = ss->parent) |
| { |
| total_dim += ss->loop->dimen; |
| for (n = 0; n < ss->loop->dimen; n++) |
| { |
| /* The bound is known, nothing to do. */ |
| if (ss->loop->to[n] != NULL_TREE) |
| continue; |
| |
| dim = ss->dim[n]; |
| gcc_assert (dim < as->rank); |
| gcc_assert (ss->loop->dimen <= as->rank); |
| |
| /* Evaluate the lower bound. */ |
| gfc_init_se (&tmpse, NULL); |
| gfc_apply_interface_mapping (mapping, &tmpse, as->lower[dim]); |
| gfc_add_block_to_block (&se->pre, &tmpse.pre); |
| gfc_add_block_to_block (&se->post, &tmpse.post); |
| lower = fold_convert (gfc_array_index_type, tmpse.expr); |
| |
| /* ...and the upper bound. */ |
| gfc_init_se (&tmpse, NULL); |
| gfc_apply_interface_mapping (mapping, &tmpse, as->upper[dim]); |
| gfc_add_block_to_block (&se->pre, &tmpse.pre); |
| gfc_add_block_to_block (&se->post, &tmpse.post); |
| upper = fold_convert (gfc_array_index_type, tmpse.expr); |
| |
| /* Set the upper bound of the loop to UPPER - LOWER. */ |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, upper, lower); |
| tmp = gfc_evaluate_now (tmp, &se->pre); |
| ss->loop->to[n] = tmp; |
| } |
| } |
| |
| gcc_assert (total_dim == as->rank); |
| } |
| |
| |
| /* Generate code to allocate an array temporary, or create a variable to |
| hold the data. If size is NULL, zero the descriptor so that the |
| callee will allocate the array. If DEALLOC is true, also generate code to |
| free the array afterwards. |
| |
| If INITIAL is not NULL, it is packed using internal_pack and the result used |
| as data instead of allocating a fresh, unitialized area of memory. |
| |
| Initialization code is added to PRE and finalization code to POST. |
| DYNAMIC is true if the caller may want to extend the array later |
| using realloc. This prevents us from putting the array on the stack. */ |
| |
| static void |
| gfc_trans_allocate_array_storage (stmtblock_t * pre, stmtblock_t * post, |
| gfc_array_info * info, tree size, tree nelem, |
| tree initial, bool dynamic, bool dealloc) |
| { |
| tree tmp; |
| tree desc; |
| bool onstack; |
| |
| desc = info->descriptor; |
| info->offset = gfc_index_zero_node; |
| if (size == NULL_TREE || integer_zerop (size)) |
| { |
| /* A callee allocated array. */ |
| gfc_conv_descriptor_data_set (pre, desc, null_pointer_node); |
| onstack = FALSE; |
| } |
| else |
| { |
| /* Allocate the temporary. */ |
| onstack = !dynamic && initial == NULL_TREE |
| && (flag_stack_arrays |
| || gfc_can_put_var_on_stack (size)); |
| |
| if (onstack) |
| { |
| /* Make a temporary variable to hold the data. */ |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, TREE_TYPE (nelem), |
| nelem, gfc_index_one_node); |
| tmp = gfc_evaluate_now (tmp, pre); |
| tmp = build_range_type (gfc_array_index_type, gfc_index_zero_node, |
| tmp); |
| tmp = build_array_type (gfc_get_element_type (TREE_TYPE (desc)), |
| tmp); |
| tmp = gfc_create_var (tmp, "A"); |
| /* If we're here only because of -fstack-arrays we have to |
| emit a DECL_EXPR to make the gimplifier emit alloca calls. */ |
| if (!gfc_can_put_var_on_stack (size)) |
| gfc_add_expr_to_block (pre, |
| fold_build1_loc (input_location, |
| DECL_EXPR, TREE_TYPE (tmp), |
| tmp)); |
| tmp = gfc_build_addr_expr (NULL_TREE, tmp); |
| gfc_conv_descriptor_data_set (pre, desc, tmp); |
| } |
| else |
| { |
| /* Allocate memory to hold the data or call internal_pack. */ |
| if (initial == NULL_TREE) |
| { |
| tmp = gfc_call_malloc (pre, NULL, size); |
| tmp = gfc_evaluate_now (tmp, pre); |
| } |
| else |
| { |
| tree packed; |
| tree source_data; |
| tree was_packed; |
| stmtblock_t do_copying; |
| |
| tmp = TREE_TYPE (initial); /* Pointer to descriptor. */ |
| gcc_assert (TREE_CODE (tmp) == POINTER_TYPE); |
| tmp = TREE_TYPE (tmp); /* The descriptor itself. */ |
| tmp = gfc_get_element_type (tmp); |
| gcc_assert (tmp == gfc_get_element_type (TREE_TYPE (desc))); |
| packed = gfc_create_var (build_pointer_type (tmp), "data"); |
| |
| tmp = build_call_expr_loc (input_location, |
| gfor_fndecl_in_pack, 1, initial); |
| tmp = fold_convert (TREE_TYPE (packed), tmp); |
| gfc_add_modify (pre, packed, tmp); |
| |
| tmp = build_fold_indirect_ref_loc (input_location, |
| initial); |
| source_data = gfc_conv_descriptor_data_get (tmp); |
| |
| /* internal_pack may return source->data without any allocation |
| or copying if it is already packed. If that's the case, we |
| need to allocate and copy manually. */ |
| |
| gfc_start_block (&do_copying); |
| tmp = gfc_call_malloc (&do_copying, NULL, size); |
| tmp = fold_convert (TREE_TYPE (packed), tmp); |
| gfc_add_modify (&do_copying, packed, tmp); |
| tmp = gfc_build_memcpy_call (packed, source_data, size); |
| gfc_add_expr_to_block (&do_copying, tmp); |
| |
| was_packed = fold_build2_loc (input_location, EQ_EXPR, |
| logical_type_node, packed, |
| source_data); |
| tmp = gfc_finish_block (&do_copying); |
| tmp = build3_v (COND_EXPR, was_packed, tmp, |
| build_empty_stmt (input_location)); |
| gfc_add_expr_to_block (pre, tmp); |
| |
| tmp = fold_convert (pvoid_type_node, packed); |
| } |
| |
| gfc_conv_descriptor_data_set (pre, desc, tmp); |
| } |
| } |
| info->data = gfc_conv_descriptor_data_get (desc); |
| |
| /* The offset is zero because we create temporaries with a zero |
| lower bound. */ |
| gfc_conv_descriptor_offset_set (pre, desc, gfc_index_zero_node); |
| |
| if (dealloc && !onstack) |
| { |
| /* Free the temporary. */ |
| tmp = gfc_conv_descriptor_data_get (desc); |
| tmp = gfc_call_free (tmp); |
| gfc_add_expr_to_block (post, tmp); |
| } |
| } |
| |
| |
| /* Get the scalarizer array dimension corresponding to actual array dimension |
| given by ARRAY_DIM. |
| |
| For example, if SS represents the array ref a(1,:,:,1), it is a |
| bidimensional scalarizer array, and the result would be 0 for ARRAY_DIM=1, |
| and 1 for ARRAY_DIM=2. |
| If SS represents transpose(a(:,1,1,:)), it is again a bidimensional |
| scalarizer array, and the result would be 1 for ARRAY_DIM=0 and 0 for |
| ARRAY_DIM=3. |
| If SS represents sum(a(:,:,:,1), dim=1), it is a 2+1-dimensional scalarizer |
| array. If called on the inner ss, the result would be respectively 0,1,2 for |
| ARRAY_DIM=0,1,2. If called on the outer ss, the result would be 0,1 |
| for ARRAY_DIM=1,2. */ |
| |
| static int |
| get_scalarizer_dim_for_array_dim (gfc_ss *ss, int array_dim) |
| { |
| int array_ref_dim; |
| int n; |
| |
| array_ref_dim = 0; |
| |
| for (; ss; ss = ss->parent) |
| for (n = 0; n < ss->dimen; n++) |
| if (ss->dim[n] < array_dim) |
| array_ref_dim++; |
| |
| return array_ref_dim; |
| } |
| |
| |
| static gfc_ss * |
| innermost_ss (gfc_ss *ss) |
| { |
| while (ss->nested_ss != NULL) |
| ss = ss->nested_ss; |
| |
| return ss; |
| } |
| |
| |
| |
| /* Get the array reference dimension corresponding to the given loop dimension. |
| It is different from the true array dimension given by the dim array in |
| the case of a partial array reference (i.e. a(:,:,1,:) for example) |
| It is different from the loop dimension in the case of a transposed array. |
| */ |
| |
| static int |
| get_array_ref_dim_for_loop_dim (gfc_ss *ss, int loop_dim) |
| { |
| return get_scalarizer_dim_for_array_dim (innermost_ss (ss), |
| ss->dim[loop_dim]); |
| } |
| |
| |
| /* Generate code to create and initialize the descriptor for a temporary |
| array. This is used for both temporaries needed by the scalarizer, and |
| functions returning arrays. Adjusts the loop variables to be |
| zero-based, and calculates the loop bounds for callee allocated arrays. |
| Allocate the array unless it's callee allocated (we have a callee |
| allocated array if 'callee_alloc' is true, or if loop->to[n] is |
| NULL_TREE for any n). Also fills in the descriptor, data and offset |
| fields of info if known. Returns the size of the array, or NULL for a |
| callee allocated array. |
| |
| 'eltype' == NULL signals that the temporary should be a class object. |
| The 'initial' expression is used to obtain the size of the dynamic |
| type; otherwise the allocation and initialization proceeds as for any |
| other expression |
| |
| PRE, POST, INITIAL, DYNAMIC and DEALLOC are as for |
| gfc_trans_allocate_array_storage. */ |
| |
| tree |
| gfc_trans_create_temp_array (stmtblock_t * pre, stmtblock_t * post, gfc_ss * ss, |
| tree eltype, tree initial, bool dynamic, |
| bool dealloc, bool callee_alloc, locus * where) |
| { |
| gfc_loopinfo *loop; |
| gfc_ss *s; |
| gfc_array_info *info; |
| tree from[GFC_MAX_DIMENSIONS], to[GFC_MAX_DIMENSIONS]; |
| tree type; |
| tree desc; |
| tree tmp; |
| tree size; |
| tree nelem; |
| tree cond; |
| tree or_expr; |
| tree class_expr = NULL_TREE; |
| int n, dim, tmp_dim; |
| int total_dim = 0; |
| |
| /* This signals a class array for which we need the size of the |
| dynamic type. Generate an eltype and then the class expression. */ |
| if (eltype == NULL_TREE && initial) |
| { |
| gcc_assert (POINTER_TYPE_P (TREE_TYPE (initial))); |
| class_expr = build_fold_indirect_ref_loc (input_location, initial); |
| eltype = TREE_TYPE (class_expr); |
| eltype = gfc_get_element_type (eltype); |
| /* Obtain the structure (class) expression. */ |
| class_expr = TREE_OPERAND (class_expr, 0); |
| gcc_assert (class_expr); |
| } |
| |
| memset (from, 0, sizeof (from)); |
| memset (to, 0, sizeof (to)); |
| |
| info = &ss->info->data.array; |
| |
| gcc_assert (ss->dimen > 0); |
| gcc_assert (ss->loop->dimen == ss->dimen); |
| |
| if (warn_array_temporaries && where) |
| gfc_warning (OPT_Warray_temporaries, |
| "Creating array temporary at %L", where); |
| |
| /* Set the lower bound to zero. */ |
| for (s = ss; s; s = s->parent) |
| { |
| loop = s->loop; |
| |
| total_dim += loop->dimen; |
| for (n = 0; n < loop->dimen; n++) |
| { |
| dim = s->dim[n]; |
| |
| /* Callee allocated arrays may not have a known bound yet. */ |
| if (loop->to[n]) |
| loop->to[n] = gfc_evaluate_now ( |
| fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| loop->to[n], loop->from[n]), |
| pre); |
| loop->from[n] = gfc_index_zero_node; |
| |
| /* We have just changed the loop bounds, we must clear the |
| corresponding specloop, so that delta calculation is not skipped |
| later in gfc_set_delta. */ |
| loop->specloop[n] = NULL; |
| |
| /* We are constructing the temporary's descriptor based on the loop |
| dimensions. As the dimensions may be accessed in arbitrary order |
| (think of transpose) the size taken from the n'th loop may not map |
| to the n'th dimension of the array. We need to reconstruct loop |
| infos in the right order before using it to set the descriptor |
| bounds. */ |
| tmp_dim = get_scalarizer_dim_for_array_dim (ss, dim); |
| from[tmp_dim] = loop->from[n]; |
| to[tmp_dim] = loop->to[n]; |
| |
| info->delta[dim] = gfc_index_zero_node; |
| info->start[dim] = gfc_index_zero_node; |
| info->end[dim] = gfc_index_zero_node; |
| info->stride[dim] = gfc_index_one_node; |
| } |
| } |
| |
| /* Initialize the descriptor. */ |
| type = |
| gfc_get_array_type_bounds (eltype, total_dim, 0, from, to, 1, |
| GFC_ARRAY_UNKNOWN, true); |
| desc = gfc_create_var (type, "atmp"); |
| GFC_DECL_PACKED_ARRAY (desc) = 1; |
| |
| info->descriptor = desc; |
| size = gfc_index_one_node; |
| |
| /* Emit a DECL_EXPR for the variable sized array type in |
| GFC_TYPE_ARRAY_DATAPTR_TYPE so the gimplification of its type |
| sizes works correctly. */ |
| tree arraytype = TREE_TYPE (GFC_TYPE_ARRAY_DATAPTR_TYPE (type)); |
| if (! TYPE_NAME (arraytype)) |
| TYPE_NAME (arraytype) = build_decl (UNKNOWN_LOCATION, TYPE_DECL, |
| NULL_TREE, arraytype); |
| gfc_add_expr_to_block (pre, build1 (DECL_EXPR, |
| arraytype, TYPE_NAME (arraytype))); |
| |
| /* Fill in the array dtype. */ |
| tmp = gfc_conv_descriptor_dtype (desc); |
| gfc_add_modify (pre, tmp, gfc_get_dtype (TREE_TYPE (desc))); |
| |
| /* |
| Fill in the bounds and stride. This is a packed array, so: |
| |
| size = 1; |
| for (n = 0; n < rank; n++) |
| { |
| stride[n] = size |
| delta = ubound[n] + 1 - lbound[n]; |
| size = size * delta; |
| } |
| size = size * sizeof(element); |
| */ |
| |
| or_expr = NULL_TREE; |
| |
| /* If there is at least one null loop->to[n], it is a callee allocated |
| array. */ |
| for (n = 0; n < total_dim; n++) |
| if (to[n] == NULL_TREE) |
| { |
| size = NULL_TREE; |
| break; |
| } |
| |
| if (size == NULL_TREE) |
| for (s = ss; s; s = s->parent) |
| for (n = 0; n < s->loop->dimen; n++) |
| { |
| dim = get_scalarizer_dim_for_array_dim (ss, s->dim[n]); |
| |
| /* For a callee allocated array express the loop bounds in terms |
| of the descriptor fields. */ |
| tmp = fold_build2_loc (input_location, |
| MINUS_EXPR, gfc_array_index_type, |
| gfc_conv_descriptor_ubound_get (desc, gfc_rank_cst[dim]), |
| gfc_conv_descriptor_lbound_get (desc, gfc_rank_cst[dim])); |
| s->loop->to[n] = tmp; |
| } |
| else |
| { |
| for (n = 0; n < total_dim; n++) |
| { |
| /* Store the stride and bound components in the descriptor. */ |
| gfc_conv_descriptor_stride_set (pre, desc, gfc_rank_cst[n], size); |
| |
| gfc_conv_descriptor_lbound_set (pre, desc, gfc_rank_cst[n], |
| gfc_index_zero_node); |
| |
| gfc_conv_descriptor_ubound_set (pre, desc, gfc_rank_cst[n], to[n]); |
| |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| to[n], gfc_index_one_node); |
| |
| /* Check whether the size for this dimension is negative. */ |
| cond = fold_build2_loc (input_location, LE_EXPR, logical_type_node, |
| tmp, gfc_index_zero_node); |
| cond = gfc_evaluate_now (cond, pre); |
| |
| if (n == 0) |
| or_expr = cond; |
| else |
| or_expr = fold_build2_loc (input_location, TRUTH_OR_EXPR, |
| logical_type_node, or_expr, cond); |
| |
| size = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, size, tmp); |
| size = gfc_evaluate_now (size, pre); |
| } |
| } |
| |
| /* Get the size of the array. */ |
| if (size && !callee_alloc) |
| { |
| tree elemsize; |
| /* If or_expr is true, then the extent in at least one |
| dimension is zero and the size is set to zero. */ |
| size = fold_build3_loc (input_location, COND_EXPR, gfc_array_index_type, |
| or_expr, gfc_index_zero_node, size); |
| |
| nelem = size; |
| if (class_expr == NULL_TREE) |
| elemsize = fold_convert (gfc_array_index_type, |
| TYPE_SIZE_UNIT (gfc_get_element_type (type))); |
| else |
| elemsize = gfc_class_vtab_size_get (class_expr); |
| |
| size = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type, |
| size, elemsize); |
| } |
| else |
| { |
| nelem = size; |
| size = NULL_TREE; |
| } |
| |
| gfc_trans_allocate_array_storage (pre, post, info, size, nelem, initial, |
| dynamic, dealloc); |
| |
| while (ss->parent) |
| ss = ss->parent; |
| |
| if (ss->dimen > ss->loop->temp_dim) |
| ss->loop->temp_dim = ss->dimen; |
| |
| return size; |
| } |
| |
| |
| /* Return the number of iterations in a loop that starts at START, |
| ends at END, and has step STEP. */ |
| |
| static tree |
| gfc_get_iteration_count (tree start, tree end, tree step) |
| { |
| tree tmp; |
| tree type; |
| |
| type = TREE_TYPE (step); |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, type, end, start); |
| tmp = fold_build2_loc (input_location, FLOOR_DIV_EXPR, type, tmp, step); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, type, tmp, |
| build_int_cst (type, 1)); |
| tmp = fold_build2_loc (input_location, MAX_EXPR, type, tmp, |
| build_int_cst (type, 0)); |
| return fold_convert (gfc_array_index_type, tmp); |
| } |
| |
| |
| /* Extend the data in array DESC by EXTRA elements. */ |
| |
| static void |
| gfc_grow_array (stmtblock_t * pblock, tree desc, tree extra) |
| { |
| tree arg0, arg1; |
| tree tmp; |
| tree size; |
| tree ubound; |
| |
| if (integer_zerop (extra)) |
| return; |
| |
| ubound = gfc_conv_descriptor_ubound_get (desc, gfc_rank_cst[0]); |
| |
| /* Add EXTRA to the upper bound. */ |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type, |
| ubound, extra); |
| gfc_conv_descriptor_ubound_set (pblock, desc, gfc_rank_cst[0], tmp); |
| |
| /* Get the value of the current data pointer. */ |
| arg0 = gfc_conv_descriptor_data_get (desc); |
| |
| /* Calculate the new array size. */ |
| size = TYPE_SIZE_UNIT (gfc_get_element_type (TREE_TYPE (desc))); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type, |
| ubound, gfc_index_one_node); |
| arg1 = fold_build2_loc (input_location, MULT_EXPR, size_type_node, |
| fold_convert (size_type_node, tmp), |
| fold_convert (size_type_node, size)); |
| |
| /* Call the realloc() function. */ |
| tmp = gfc_call_realloc (pblock, arg0, arg1); |
| gfc_conv_descriptor_data_set (pblock, desc, tmp); |
| } |
| |
| |
| /* Return true if the bounds of iterator I can only be determined |
| at run time. */ |
| |
| static inline bool |
| gfc_iterator_has_dynamic_bounds (gfc_iterator * i) |
| { |
| return (i->start->expr_type != EXPR_CONSTANT |
| || i->end->expr_type != EXPR_CONSTANT |
| || i->step->expr_type != EXPR_CONSTANT); |
| } |
| |
| |
| /* Split the size of constructor element EXPR into the sum of two terms, |
| one of which can be determined at compile time and one of which must |
| be calculated at run time. Set *SIZE to the former and return true |
| if the latter might be nonzero. */ |
| |
| static bool |
| gfc_get_array_constructor_element_size (mpz_t * size, gfc_expr * expr) |
| { |
| if (expr->expr_type == EXPR_ARRAY) |
| return gfc_get_array_constructor_size (size, expr->value.constructor); |
| else if (expr->rank > 0) |
| { |
| /* Calculate everything at run time. */ |
| mpz_set_ui (*size, 0); |
| return true; |
| } |
| else |
| { |
| /* A single element. */ |
| mpz_set_ui (*size, 1); |
| return false; |
| } |
| } |
| |
| |
| /* Like gfc_get_array_constructor_element_size, but applied to the whole |
| of array constructor C. */ |
| |
| static bool |
| gfc_get_array_constructor_size (mpz_t * size, gfc_constructor_base base) |
| { |
| gfc_constructor *c; |
| gfc_iterator *i; |
| mpz_t val; |
| mpz_t len; |
| bool dynamic; |
| |
| mpz_set_ui (*size, 0); |
| mpz_init (len); |
| mpz_init (val); |
| |
| dynamic = false; |
| for (c = gfc_constructor_first (base); c; c = gfc_constructor_next (c)) |
| { |
| i = c->iterator; |
| if (i && gfc_iterator_has_dynamic_bounds (i)) |
| dynamic = true; |
| else |
| { |
| dynamic |= gfc_get_array_constructor_element_size (&len, c->expr); |
| if (i) |
| { |
| /* Multiply the static part of the element size by the |
| number of iterations. */ |
| mpz_sub (val, i->end->value.integer, i->start->value.integer); |
| mpz_fdiv_q (val, val, i->step->value.integer); |
| mpz_add_ui (val, val, 1); |
| if (mpz_sgn (val) > 0) |
| mpz_mul (len, len, val); |
| else |
| mpz_set_ui (len, 0); |
| } |
| mpz_add (*size, *size, len); |
| } |
| } |
| mpz_clear (len); |
| mpz_clear (val); |
| return dynamic; |
| } |
| |
| |
| /* Make sure offset is a variable. */ |
| |
| static void |
| gfc_put_offset_into_var (stmtblock_t * pblock, tree * poffset, |
| tree * offsetvar) |
| { |
| /* We should have already created the offset variable. We cannot |
| create it here because we may be in an inner scope. */ |
| gcc_assert (*offsetvar != NULL_TREE); |
| gfc_add_modify (pblock, *offsetvar, *poffset); |
| *poffset = *offsetvar; |
| TREE_USED (*offsetvar) = 1; |
| } |
| |
| |
| /* Variables needed for bounds-checking. */ |
| static bool first_len; |
| static tree first_len_val; |
| static bool typespec_chararray_ctor; |
| |
| static void |
| gfc_trans_array_ctor_element (stmtblock_t * pblock, tree desc, |
| tree offset, gfc_se * se, gfc_expr * expr) |
| { |
| tree tmp; |
| |
| gfc_conv_expr (se, expr); |
| |
| /* Store the value. */ |
| tmp = build_fold_indirect_ref_loc (input_location, |
| gfc_conv_descriptor_data_get (desc)); |
| tmp = gfc_build_array_ref (tmp, offset, NULL); |
| |
| if (expr->ts.type == BT_CHARACTER) |
| { |
| int i = gfc_validate_kind (BT_CHARACTER, expr->ts.kind, false); |
| tree esize; |
| |
| esize = size_in_bytes (gfc_get_element_type (TREE_TYPE (desc))); |
| esize = fold_convert (gfc_charlen_type_node, esize); |
| esize = fold_build2_loc (input_location, TRUNC_DIV_EXPR, |
| TREE_TYPE (esize), esize, |
| build_int_cst (TREE_TYPE (esize), |
| gfc_character_kinds[i].bit_size / 8)); |
| |
| gfc_conv_string_parameter (se); |
| if (POINTER_TYPE_P (TREE_TYPE (tmp))) |
| { |
| /* The temporary is an array of pointers. */ |
| se->expr = fold_convert (TREE_TYPE (tmp), se->expr); |
| gfc_add_modify (&se->pre, tmp, se->expr); |
| } |
| else |
| { |
| /* The temporary is an array of string values. */ |
| tmp = gfc_build_addr_expr (gfc_get_pchar_type (expr->ts.kind), tmp); |
| /* We know the temporary and the value will be the same length, |
| so can use memcpy. */ |
| gfc_trans_string_copy (&se->pre, esize, tmp, expr->ts.kind, |
| se->string_length, se->expr, expr->ts.kind); |
| } |
| if ((gfc_option.rtcheck & GFC_RTCHECK_BOUNDS) && !typespec_chararray_ctor) |
| { |
| if (first_len) |
| { |
| gfc_add_modify (&se->pre, first_len_val, |
| fold_convert (TREE_TYPE (first_len_val), |
| se->string_length)); |
| first_len = false; |
| } |
| else |
| { |
| /* Verify that all constructor elements are of the same |
| length. */ |
| tree rhs = fold_convert (TREE_TYPE (first_len_val), |
| se->string_length); |
| tree cond = fold_build2_loc (input_location, NE_EXPR, |
| logical_type_node, first_len_val, |
| rhs); |
| gfc_trans_runtime_check |
| (true, false, cond, &se->pre, &expr->where, |
| "Different CHARACTER lengths (%ld/%ld) in array constructor", |
| fold_convert (long_integer_type_node, first_len_val), |
| fold_convert (long_integer_type_node, se->string_length)); |
| } |
| } |
| } |
| else if (GFC_CLASS_TYPE_P (TREE_TYPE (se->expr)) |
| && !GFC_CLASS_TYPE_P (gfc_get_element_type (TREE_TYPE (desc)))) |
| { |
| /* Assignment of a CLASS array constructor to a derived type array. */ |
| if (expr->expr_type == EXPR_FUNCTION) |
| se->expr = gfc_evaluate_now (se->expr, pblock); |
| se->expr = gfc_class_data_get (se->expr); |
| se->expr = build_fold_indirect_ref_loc (input_location, se->expr); |
| se->expr = fold_convert (TREE_TYPE (tmp), se->expr); |
| gfc_add_modify (&se->pre, tmp, se->expr); |
| } |
| else |
| { |
| /* TODO: Should the frontend already have done this conversion? */ |
| se->expr = fold_convert (TREE_TYPE (tmp), se->expr); |
| gfc_add_modify (&se->pre, tmp, se->expr); |
| } |
| |
| gfc_add_block_to_block (pblock, &se->pre); |
| gfc_add_block_to_block (pblock, &se->post); |
| } |
| |
| |
| /* Add the contents of an array to the constructor. DYNAMIC is as for |
| gfc_trans_array_constructor_value. */ |
| |
| static void |
| gfc_trans_array_constructor_subarray (stmtblock_t * pblock, |
| tree type ATTRIBUTE_UNUSED, |
| tree desc, gfc_expr * expr, |
| tree * poffset, tree * offsetvar, |
| bool dynamic) |
| { |
| gfc_se se; |
| gfc_ss *ss; |
| gfc_loopinfo loop; |
| stmtblock_t body; |
| tree tmp; |
| tree size; |
| int n; |
| |
| /* We need this to be a variable so we can increment it. */ |
| gfc_put_offset_into_var (pblock, poffset, offsetvar); |
| |
| gfc_init_se (&se, NULL); |
| |
| /* Walk the array expression. */ |
| ss = gfc_walk_expr (expr); |
| gcc_assert (ss != gfc_ss_terminator); |
| |
| /* Initialize the scalarizer. */ |
| gfc_init_loopinfo (&loop); |
| gfc_add_ss_to_loop (&loop, ss); |
| |
| /* Initialize the loop. */ |
| gfc_conv_ss_startstride (&loop); |
| gfc_conv_loop_setup (&loop, &expr->where); |
| |
| /* Make sure the constructed array has room for the new data. */ |
| if (dynamic) |
| { |
| /* Set SIZE to the total number of elements in the subarray. */ |
| size = gfc_index_one_node; |
| for (n = 0; n < loop.dimen; n++) |
| { |
| tmp = gfc_get_iteration_count (loop.from[n], loop.to[n], |
| gfc_index_one_node); |
| size = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, size, tmp); |
| } |
| |
| /* Grow the constructed array by SIZE elements. */ |
| gfc_grow_array (&loop.pre, desc, size); |
| } |
| |
| /* Make the loop body. */ |
| gfc_mark_ss_chain_used (ss, 1); |
| gfc_start_scalarized_body (&loop, &body); |
| gfc_copy_loopinfo_to_se (&se, &loop); |
| se.ss = ss; |
| |
| gfc_trans_array_ctor_element (&body, desc, *poffset, &se, expr); |
| gcc_assert (se.ss == gfc_ss_terminator); |
| |
| /* Increment the offset. */ |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type, |
| *poffset, gfc_index_one_node); |
| gfc_add_modify (&body, *poffset, tmp); |
| |
| /* Finish the loop. */ |
| gfc_trans_scalarizing_loops (&loop, &body); |
| gfc_add_block_to_block (&loop.pre, &loop.post); |
| tmp = gfc_finish_block (&loop.pre); |
| gfc_add_expr_to_block (pblock, tmp); |
| |
| gfc_cleanup_loop (&loop); |
| } |
| |
| |
| /* Assign the values to the elements of an array constructor. DYNAMIC |
| is true if descriptor DESC only contains enough data for the static |
| size calculated by gfc_get_array_constructor_size. When true, memory |
| for the dynamic parts must be allocated using realloc. */ |
| |
| static void |
| gfc_trans_array_constructor_value (stmtblock_t * pblock, tree type, |
| tree desc, gfc_constructor_base base, |
| tree * poffset, tree * offsetvar, |
| bool dynamic) |
| { |
| tree tmp; |
| tree start = NULL_TREE; |
| tree end = NULL_TREE; |
| tree step = NULL_TREE; |
| stmtblock_t body; |
| gfc_se se; |
| mpz_t size; |
| gfc_constructor *c; |
| |
| tree shadow_loopvar = NULL_TREE; |
| gfc_saved_var saved_loopvar; |
| |
| mpz_init (size); |
| for (c = gfc_constructor_first (base); c; c = gfc_constructor_next (c)) |
| { |
| /* If this is an iterator or an array, the offset must be a variable. */ |
| if ((c->iterator || c->expr->rank > 0) && INTEGER_CST_P (*poffset)) |
| gfc_put_offset_into_var (pblock, poffset, offsetvar); |
| |
| /* Shadowing the iterator avoids changing its value and saves us from |
| keeping track of it. Further, it makes sure that there's always a |
| backend-decl for the symbol, even if there wasn't one before, |
| e.g. in the case of an iterator that appears in a specification |
| expression in an interface mapping. */ |
| if (c->iterator) |
| { |
| gfc_symbol *sym; |
| tree type; |
| |
| /* Evaluate loop bounds before substituting the loop variable |
| in case they depend on it. Such a case is invalid, but it is |
| not more expensive to do the right thing here. |
| See PR 44354. */ |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_val (&se, c->iterator->start); |
| gfc_add_block_to_block (pblock, &se.pre); |
| start = gfc_evaluate_now (se.expr, pblock); |
| |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_val (&se, c->iterator->end); |
| gfc_add_block_to_block (pblock, &se.pre); |
| end = gfc_evaluate_now (se.expr, pblock); |
| |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_val (&se, c->iterator->step); |
| gfc_add_block_to_block (pblock, &se.pre); |
| step = gfc_evaluate_now (se.expr, pblock); |
| |
| sym = c->iterator->var->symtree->n.sym; |
| type = gfc_typenode_for_spec (&sym->ts); |
| |
| shadow_loopvar = gfc_create_var (type, "shadow_loopvar"); |
| gfc_shadow_sym (sym, shadow_loopvar, &saved_loopvar); |
| } |
| |
| gfc_start_block (&body); |
| |
| if (c->expr->expr_type == EXPR_ARRAY) |
| { |
| /* Array constructors can be nested. */ |
| gfc_trans_array_constructor_value (&body, type, desc, |
| c->expr->value.constructor, |
| poffset, offsetvar, dynamic); |
| } |
| else if (c->expr->rank > 0) |
| { |
| gfc_trans_array_constructor_subarray (&body, type, desc, c->expr, |
| poffset, offsetvar, dynamic); |
| } |
| else |
| { |
| /* This code really upsets the gimplifier so don't bother for now. */ |
| gfc_constructor *p; |
| HOST_WIDE_INT n; |
| HOST_WIDE_INT size; |
| |
| p = c; |
| n = 0; |
| while (p && !(p->iterator || p->expr->expr_type != EXPR_CONSTANT)) |
| { |
| p = gfc_constructor_next (p); |
| n++; |
| } |
| if (n < 4) |
| { |
| /* Scalar values. */ |
| gfc_init_se (&se, NULL); |
| gfc_trans_array_ctor_element (&body, desc, *poffset, |
| &se, c->expr); |
| |
| *poffset = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| *poffset, gfc_index_one_node); |
| } |
| else |
| { |
| /* Collect multiple scalar constants into a constructor. */ |
| vec<constructor_elt, va_gc> *v = NULL; |
| tree init; |
| tree bound; |
| tree tmptype; |
| HOST_WIDE_INT idx = 0; |
| |
| p = c; |
| /* Count the number of consecutive scalar constants. */ |
| while (p && !(p->iterator |
| || p->expr->expr_type != EXPR_CONSTANT)) |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_constant (&se, p->expr); |
| |
| if (c->expr->ts.type != BT_CHARACTER) |
| se.expr = fold_convert (type, se.expr); |
| /* For constant character array constructors we build |
| an array of pointers. */ |
| else if (POINTER_TYPE_P (type)) |
| se.expr = gfc_build_addr_expr |
| (gfc_get_pchar_type (p->expr->ts.kind), |
| se.expr); |
| |
| CONSTRUCTOR_APPEND_ELT (v, |
| build_int_cst (gfc_array_index_type, |
| idx++), |
| se.expr); |
| c = p; |
| p = gfc_constructor_next (p); |
| } |
| |
| bound = size_int (n - 1); |
| /* Create an array type to hold them. */ |
| tmptype = build_range_type (gfc_array_index_type, |
| gfc_index_zero_node, bound); |
| tmptype = build_array_type (type, tmptype); |
| |
| init = build_constructor (tmptype, v); |
| TREE_CONSTANT (init) = 1; |
| TREE_STATIC (init) = 1; |
| /* Create a static variable to hold the data. */ |
| tmp = gfc_create_var (tmptype, "data"); |
| TREE_STATIC (tmp) = 1; |
| TREE_CONSTANT (tmp) = 1; |
| TREE_READONLY (tmp) = 1; |
| DECL_INITIAL (tmp) = init; |
| init = tmp; |
| |
| /* Use BUILTIN_MEMCPY to assign the values. */ |
| tmp = gfc_conv_descriptor_data_get (desc); |
| tmp = build_fold_indirect_ref_loc (input_location, |
| tmp); |
| tmp = gfc_build_array_ref (tmp, *poffset, NULL); |
| tmp = gfc_build_addr_expr (NULL_TREE, tmp); |
| init = gfc_build_addr_expr (NULL_TREE, init); |
| |
| size = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (type)); |
| bound = build_int_cst (size_type_node, n * size); |
| tmp = build_call_expr_loc (input_location, |
| builtin_decl_explicit (BUILT_IN_MEMCPY), |
| 3, tmp, init, bound); |
| gfc_add_expr_to_block (&body, tmp); |
| |
| *poffset = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, *poffset, |
| build_int_cst (gfc_array_index_type, n)); |
| } |
| if (!INTEGER_CST_P (*poffset)) |
| { |
| gfc_add_modify (&body, *offsetvar, *poffset); |
| *poffset = *offsetvar; |
| } |
| } |
| |
| /* The frontend should already have done any expansions |
| at compile-time. */ |
| if (!c->iterator) |
| { |
| /* Pass the code as is. */ |
| tmp = gfc_finish_block (&body); |
| gfc_add_expr_to_block (pblock, tmp); |
| } |
| else |
| { |
| /* Build the implied do-loop. */ |
| stmtblock_t implied_do_block; |
| tree cond; |
| tree exit_label; |
| tree loopbody; |
| tree tmp2; |
| |
| loopbody = gfc_finish_block (&body); |
| |
| /* Create a new block that holds the implied-do loop. A temporary |
| loop-variable is used. */ |
| gfc_start_block(&implied_do_block); |
| |
| /* Initialize the loop. */ |
| gfc_add_modify (&implied_do_block, shadow_loopvar, start); |
| |
| /* If this array expands dynamically, and the number of iterations |
| is not constant, we won't have allocated space for the static |
| part of C->EXPR's size. Do that now. */ |
| if (dynamic && gfc_iterator_has_dynamic_bounds (c->iterator)) |
| { |
| /* Get the number of iterations. */ |
| tmp = gfc_get_iteration_count (shadow_loopvar, end, step); |
| |
| /* Get the static part of C->EXPR's size. */ |
| gfc_get_array_constructor_element_size (&size, c->expr); |
| tmp2 = gfc_conv_mpz_to_tree (size, gfc_index_integer_kind); |
| |
| /* Grow the array by TMP * TMP2 elements. */ |
| tmp = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, tmp, tmp2); |
| gfc_grow_array (&implied_do_block, desc, tmp); |
| } |
| |
| /* Generate the loop body. */ |
| exit_label = gfc_build_label_decl (NULL_TREE); |
| gfc_start_block (&body); |
| |
| /* Generate the exit condition. Depending on the sign of |
| the step variable we have to generate the correct |
| comparison. */ |
| tmp = fold_build2_loc (input_location, GT_EXPR, logical_type_node, |
| step, build_int_cst (TREE_TYPE (step), 0)); |
| cond = fold_build3_loc (input_location, COND_EXPR, |
| logical_type_node, tmp, |
| fold_build2_loc (input_location, GT_EXPR, |
| logical_type_node, shadow_loopvar, end), |
| fold_build2_loc (input_location, LT_EXPR, |
| logical_type_node, shadow_loopvar, end)); |
| tmp = build1_v (GOTO_EXPR, exit_label); |
| TREE_USED (exit_label) = 1; |
| tmp = build3_v (COND_EXPR, cond, tmp, |
| build_empty_stmt (input_location)); |
| gfc_add_expr_to_block (&body, tmp); |
| |
| /* The main loop body. */ |
| gfc_add_expr_to_block (&body, loopbody); |
| |
| /* Increase loop variable by step. */ |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| TREE_TYPE (shadow_loopvar), shadow_loopvar, |
| step); |
| gfc_add_modify (&body, shadow_loopvar, tmp); |
| |
| /* Finish the loop. */ |
| tmp = gfc_finish_block (&body); |
| tmp = build1_v (LOOP_EXPR, tmp); |
| gfc_add_expr_to_block (&implied_do_block, tmp); |
| |
| /* Add the exit label. */ |
| tmp = build1_v (LABEL_EXPR, exit_label); |
| gfc_add_expr_to_block (&implied_do_block, tmp); |
| |
| /* Finish the implied-do loop. */ |
| tmp = gfc_finish_block(&implied_do_block); |
| gfc_add_expr_to_block(pblock, tmp); |
| |
| gfc_restore_sym (c->iterator->var->symtree->n.sym, &saved_loopvar); |
| } |
| } |
| mpz_clear (size); |
| } |
| |
| |
| /* The array constructor code can create a string length with an operand |
| in the form of a temporary variable. This variable will retain its |
| context (current_function_decl). If we store this length tree in a |
| gfc_charlen structure which is shared by a variable in another |
| context, the resulting gfc_charlen structure with a variable in a |
| different context, we could trip the assertion in expand_expr_real_1 |
| when it sees that a variable has been created in one context and |
| referenced in another. |
| |
| If this might be the case, we create a new gfc_charlen structure and |
| link it into the current namespace. */ |
| |
| static void |
| store_backend_decl (gfc_charlen **clp, tree len, bool force_new_cl) |
| { |
| if (force_new_cl) |
| { |
| gfc_charlen *new_cl = gfc_new_charlen (gfc_current_ns, *clp); |
| *clp = new_cl; |
| } |
| (*clp)->backend_decl = len; |
| } |
| |
| /* A catch-all to obtain the string length for anything that is not |
| a substring of non-constant length, a constant, array or variable. */ |
| |
| static void |
| get_array_ctor_all_strlen (stmtblock_t *block, gfc_expr *e, tree *len) |
| { |
| gfc_se se; |
| |
| /* Don't bother if we already know the length is a constant. */ |
| if (*len && INTEGER_CST_P (*len)) |
| return; |
| |
| if (!e->ref && e->ts.u.cl && e->ts.u.cl->length |
| && e->ts.u.cl->length->expr_type == EXPR_CONSTANT) |
| { |
| /* This is easy. */ |
| gfc_conv_const_charlen (e->ts.u.cl); |
| *len = e->ts.u.cl->backend_decl; |
| } |
| else |
| { |
| /* Otherwise, be brutal even if inefficient. */ |
| gfc_init_se (&se, NULL); |
| |
| /* No function call, in case of side effects. */ |
| se.no_function_call = 1; |
| if (e->rank == 0) |
| gfc_conv_expr (&se, e); |
| else |
| gfc_conv_expr_descriptor (&se, e); |
| |
| /* Fix the value. */ |
| *len = gfc_evaluate_now (se.string_length, &se.pre); |
| |
| gfc_add_block_to_block (block, &se.pre); |
| gfc_add_block_to_block (block, &se.post); |
| |
| store_backend_decl (&e->ts.u.cl, *len, true); |
| } |
| } |
| |
| |
| /* Figure out the string length of a variable reference expression. |
| Used by get_array_ctor_strlen. */ |
| |
| static void |
| get_array_ctor_var_strlen (stmtblock_t *block, gfc_expr * expr, tree * len) |
| { |
| gfc_ref *ref; |
| gfc_typespec *ts; |
| mpz_t char_len; |
| |
| /* Don't bother if we already know the length is a constant. */ |
| if (*len && INTEGER_CST_P (*len)) |
| return; |
| |
| ts = &expr->symtree->n.sym->ts; |
| for (ref = expr->ref; ref; ref = ref->next) |
| { |
| switch (ref->type) |
| { |
| case REF_ARRAY: |
| /* Array references don't change the string length. */ |
| break; |
| |
| case REF_COMPONENT: |
| /* Use the length of the component. */ |
| ts = &ref->u.c.component->ts; |
| break; |
| |
| case REF_SUBSTRING: |
| if (ref->u.ss.start->expr_type != EXPR_CONSTANT |
| || ref->u.ss.end->expr_type != EXPR_CONSTANT) |
| { |
| /* Note that this might evaluate expr. */ |
| get_array_ctor_all_strlen (block, expr, len); |
| return; |
| } |
| mpz_init_set_ui (char_len, 1); |
| mpz_add (char_len, char_len, ref->u.ss.end->value.integer); |
| mpz_sub (char_len, char_len, ref->u.ss.start->value.integer); |
| *len = gfc_conv_mpz_to_tree_type (char_len, gfc_charlen_type_node); |
| mpz_clear (char_len); |
| return; |
| |
| default: |
| gcc_unreachable (); |
| } |
| } |
| |
| *len = ts->u.cl->backend_decl; |
| } |
| |
| |
| /* Figure out the string length of a character array constructor. |
| If len is NULL, don't calculate the length; this happens for recursive calls |
| when a sub-array-constructor is an element but not at the first position, |
| so when we're not interested in the length. |
| Returns TRUE if all elements are character constants. */ |
| |
| bool |
| get_array_ctor_strlen (stmtblock_t *block, gfc_constructor_base base, tree * len) |
| { |
| gfc_constructor *c; |
| bool is_const; |
| |
| is_const = TRUE; |
| |
| if (gfc_constructor_first (base) == NULL) |
| { |
| if (len) |
| *len = build_int_cstu (gfc_charlen_type_node, 0); |
| return is_const; |
| } |
| |
| /* Loop over all constructor elements to find out is_const, but in len we |
| want to store the length of the first, not the last, element. We can |
| of course exit the loop as soon as is_const is found to be false. */ |
| for (c = gfc_constructor_first (base); |
| c && is_const; c = gfc_constructor_next (c)) |
| { |
| switch (c->expr->expr_type) |
| { |
| case EXPR_CONSTANT: |
| if (len && !(*len && INTEGER_CST_P (*len))) |
| *len = build_int_cstu (gfc_charlen_type_node, |
| c->expr->value.character.length); |
| break; |
| |
| case EXPR_ARRAY: |
| if (!get_array_ctor_strlen (block, c->expr->value.constructor, len)) |
| is_const = false; |
| break; |
| |
| case EXPR_VARIABLE: |
| is_const = false; |
| if (len) |
| get_array_ctor_var_strlen (block, c->expr, len); |
| break; |
| |
| default: |
| is_const = false; |
| if (len) |
| get_array_ctor_all_strlen (block, c->expr, len); |
| break; |
| } |
| |
| /* After the first iteration, we don't want the length modified. */ |
| len = NULL; |
| } |
| |
| return is_const; |
| } |
| |
| /* Check whether the array constructor C consists entirely of constant |
| elements, and if so returns the number of those elements, otherwise |
| return zero. Note, an empty or NULL array constructor returns zero. */ |
| |
| unsigned HOST_WIDE_INT |
| gfc_constant_array_constructor_p (gfc_constructor_base base) |
| { |
| unsigned HOST_WIDE_INT nelem = 0; |
| |
| gfc_constructor *c = gfc_constructor_first (base); |
| while (c) |
| { |
| if (c->iterator |
| || c->expr->rank > 0 |
| || c->expr->expr_type != EXPR_CONSTANT) |
| return 0; |
| c = gfc_constructor_next (c); |
| nelem++; |
| } |
| return nelem; |
| } |
| |
| |
| /* Given EXPR, the constant array constructor specified by an EXPR_ARRAY, |
| and the tree type of it's elements, TYPE, return a static constant |
| variable that is compile-time initialized. */ |
| |
| tree |
| gfc_build_constant_array_constructor (gfc_expr * expr, tree type) |
| { |
| tree tmptype, init, tmp; |
| HOST_WIDE_INT nelem; |
| gfc_constructor *c; |
| gfc_array_spec as; |
| gfc_se se; |
| int i; |
| vec<constructor_elt, va_gc> *v = NULL; |
| |
| /* First traverse the constructor list, converting the constants |
| to tree to build an initializer. */ |
| nelem = 0; |
| c = gfc_constructor_first (expr->value.constructor); |
| while (c) |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_constant (&se, c->expr); |
| if (c->expr->ts.type != BT_CHARACTER) |
| se.expr = fold_convert (type, se.expr); |
| else if (POINTER_TYPE_P (type)) |
| se.expr = gfc_build_addr_expr (gfc_get_pchar_type (c->expr->ts.kind), |
| se.expr); |
| CONSTRUCTOR_APPEND_ELT (v, build_int_cst (gfc_array_index_type, nelem), |
| se.expr); |
| c = gfc_constructor_next (c); |
| nelem++; |
| } |
| |
| /* Next determine the tree type for the array. We use the gfortran |
| front-end's gfc_get_nodesc_array_type in order to create a suitable |
| GFC_ARRAY_TYPE_P that may be used by the scalarizer. */ |
| |
| memset (&as, 0, sizeof (gfc_array_spec)); |
| |
| as.rank = expr->rank; |
| as.type = AS_EXPLICIT; |
| if (!expr->shape) |
| { |
| as.lower[0] = gfc_get_int_expr (gfc_default_integer_kind, NULL, 0); |
| as.upper[0] = gfc_get_int_expr (gfc_default_integer_kind, |
| NULL, nelem - 1); |
| } |
| else |
| for (i = 0; i < expr->rank; i++) |
| { |
| int tmp = (int) mpz_get_si (expr->shape[i]); |
| as.lower[i] = gfc_get_int_expr (gfc_default_integer_kind, NULL, 0); |
| as.upper[i] = gfc_get_int_expr (gfc_default_integer_kind, |
| NULL, tmp - 1); |
| } |
| |
| tmptype = gfc_get_nodesc_array_type (type, &as, PACKED_STATIC, true); |
| |
| /* as is not needed anymore. */ |
| for (i = 0; i < as.rank + as.corank; i++) |
| { |
| gfc_free_expr (as.lower[i]); |
| gfc_free_expr (as.upper[i]); |
| } |
| |
| init = build_constructor (tmptype, v); |
| |
| TREE_CONSTANT (init) = 1; |
| TREE_STATIC (init) = 1; |
| |
| tmp = build_decl (input_location, VAR_DECL, create_tmp_var_name ("A"), |
| tmptype); |
| DECL_ARTIFICIAL (tmp) = 1; |
| DECL_IGNORED_P (tmp) = 1; |
| TREE_STATIC (tmp) = 1; |
| TREE_CONSTANT (tmp) = 1; |
| TREE_READONLY (tmp) = 1; |
| DECL_INITIAL (tmp) = init; |
| pushdecl (tmp); |
| |
| return tmp; |
| } |
| |
| |
| /* Translate a constant EXPR_ARRAY array constructor for the scalarizer. |
| This mostly initializes the scalarizer state info structure with the |
| appropriate values to directly use the array created by the function |
| gfc_build_constant_array_constructor. */ |
| |
| static void |
| trans_constant_array_constructor (gfc_ss * ss, tree type) |
| { |
| gfc_array_info *info; |
| tree tmp; |
| int i; |
| |
| tmp = gfc_build_constant_array_constructor (ss->info->expr, type); |
| |
| info = &ss->info->data.array; |
| |
| info->descriptor = tmp; |
| info->data = gfc_build_addr_expr (NULL_TREE, tmp); |
| info->offset = gfc_index_zero_node; |
| |
| for (i = 0; i < ss->dimen; i++) |
| { |
| info->delta[i] = gfc_index_zero_node; |
| info->start[i] = gfc_index_zero_node; |
| info->end[i] = gfc_index_zero_node; |
| info->stride[i] = gfc_index_one_node; |
| } |
| } |
| |
| |
| static int |
| get_rank (gfc_loopinfo *loop) |
| { |
| int rank; |
| |
| rank = 0; |
| for (; loop; loop = loop->parent) |
| rank += loop->dimen; |
| |
| return rank; |
| } |
| |
| |
| /* Helper routine of gfc_trans_array_constructor to determine if the |
| bounds of the loop specified by LOOP are constant and simple enough |
| to use with trans_constant_array_constructor. Returns the |
| iteration count of the loop if suitable, and NULL_TREE otherwise. */ |
| |
| static tree |
| constant_array_constructor_loop_size (gfc_loopinfo * l) |
| { |
| gfc_loopinfo *loop; |
| tree size = gfc_index_one_node; |
| tree tmp; |
| int i, total_dim; |
| |
| total_dim = get_rank (l); |
| |
| for (loop = l; loop; loop = loop->parent) |
| { |
| for (i = 0; i < loop->dimen; i++) |
| { |
| /* If the bounds aren't constant, return NULL_TREE. */ |
| if (!INTEGER_CST_P (loop->from[i]) || !INTEGER_CST_P (loop->to[i])) |
| return NULL_TREE; |
| if (!integer_zerop (loop->from[i])) |
| { |
| /* Only allow nonzero "from" in one-dimensional arrays. */ |
| if (total_dim != 1) |
| return NULL_TREE; |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| loop->to[i], loop->from[i]); |
| } |
| else |
| tmp = loop->to[i]; |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, tmp, gfc_index_one_node); |
| size = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, size, tmp); |
| } |
| } |
| |
| return size; |
| } |
| |
| |
| static tree * |
| get_loop_upper_bound_for_array (gfc_ss *array, int array_dim) |
| { |
| gfc_ss *ss; |
| int n; |
| |
| gcc_assert (array->nested_ss == NULL); |
| |
| for (ss = array; ss; ss = ss->parent) |
| for (n = 0; n < ss->loop->dimen; n++) |
| if (array_dim == get_array_ref_dim_for_loop_dim (ss, n)) |
| return &(ss->loop->to[n]); |
| |
| gcc_unreachable (); |
| } |
| |
| |
| static gfc_loopinfo * |
| outermost_loop (gfc_loopinfo * loop) |
| { |
| while (loop->parent != NULL) |
| loop = loop->parent; |
| |
| return loop; |
| } |
| |
| |
| /* Array constructors are handled by constructing a temporary, then using that |
| within the scalarization loop. This is not optimal, but seems by far the |
| simplest method. */ |
| |
| static void |
| trans_array_constructor (gfc_ss * ss, locus * where) |
| { |
| gfc_constructor_base c; |
| tree offset; |
| tree offsetvar; |
| tree desc; |
| tree type; |
| tree tmp; |
| tree *loop_ubound0; |
| bool dynamic; |
| bool old_first_len, old_typespec_chararray_ctor; |
| tree old_first_len_val; |
| gfc_loopinfo *loop, *outer_loop; |
| gfc_ss_info *ss_info; |
| gfc_expr *expr; |
| gfc_ss *s; |
| tree neg_len; |
| char *msg; |
| |
| /* Save the old values for nested checking. */ |
| old_first_len = first_len; |
| old_first_len_val = first_len_val; |
| old_typespec_chararray_ctor = typespec_chararray_ctor; |
| |
| loop = ss->loop; |
| outer_loop = outermost_loop (loop); |
| ss_info = ss->info; |
| expr = ss_info->expr; |
| |
| /* Do bounds-checking here and in gfc_trans_array_ctor_element only if no |
| typespec was given for the array constructor. */ |
| typespec_chararray_ctor = (expr->ts.type == BT_CHARACTER |
| && expr->ts.u.cl |
| && expr->ts.u.cl->length_from_typespec); |
| |
| if ((gfc_option.rtcheck & GFC_RTCHECK_BOUNDS) |
| && expr->ts.type == BT_CHARACTER && !typespec_chararray_ctor) |
| { |
| first_len_val = gfc_create_var (gfc_charlen_type_node, "len"); |
| first_len = true; |
| } |
| |
| gcc_assert (ss->dimen == ss->loop->dimen); |
| |
| c = expr->value.constructor; |
| if (expr->ts.type == BT_CHARACTER) |
| { |
| bool const_string; |
| bool force_new_cl = false; |
| |
| /* get_array_ctor_strlen walks the elements of the constructor, if a |
| typespec was given, we already know the string length and want the one |
| specified there. */ |
| if (typespec_chararray_ctor && expr->ts.u.cl->length |
| && expr->ts.u.cl->length->expr_type != EXPR_CONSTANT) |
| { |
| gfc_se length_se; |
| |
| const_string = false; |
| gfc_init_se (&length_se, NULL); |
| gfc_conv_expr_type (&length_se, expr->ts.u.cl->length, |
| gfc_charlen_type_node); |
| ss_info->string_length = length_se.expr; |
| |
| /* Check if the character length is negative. If it is, then |
| set LEN = 0. */ |
| neg_len = fold_build2_loc (input_location, LT_EXPR, |
| logical_type_node, ss_info->string_length, |
| build_zero_cst (TREE_TYPE |
| (ss_info->string_length))); |
| /* Print a warning if bounds checking is enabled. */ |
| if (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS) |
| { |
| msg = xasprintf ("Negative character length treated as LEN = 0"); |
| gfc_trans_runtime_check (false, true, neg_len, &length_se.pre, |
| where, msg); |
| free (msg); |
| } |
| |
| ss_info->string_length |
| = fold_build3_loc (input_location, COND_EXPR, |
| gfc_charlen_type_node, neg_len, |
| build_zero_cst |
| (TREE_TYPE (ss_info->string_length)), |
| ss_info->string_length); |
| ss_info->string_length = gfc_evaluate_now (ss_info->string_length, |
| &length_se.pre); |
| |
| gfc_add_block_to_block (&outer_loop->pre, &length_se.pre); |
| gfc_add_block_to_block (&outer_loop->post, &length_se.post); |
| } |
| else |
| { |
| const_string = get_array_ctor_strlen (&outer_loop->pre, c, |
| &ss_info->string_length); |
| force_new_cl = true; |
| } |
| |
| /* Complex character array constructors should have been taken care of |
| and not end up here. */ |
| gcc_assert (ss_info->string_length); |
| |
| store_backend_decl (&expr->ts.u.cl, ss_info->string_length, force_new_cl); |
| |
| type = gfc_get_character_type_len (expr->ts.kind, ss_info->string_length); |
| if (const_string) |
| type = build_pointer_type (type); |
| } |
| else |
| type = gfc_typenode_for_spec (expr->ts.type == BT_CLASS |
| ? &CLASS_DATA (expr)->ts : &expr->ts); |
| |
| /* See if the constructor determines the loop bounds. */ |
| dynamic = false; |
| |
| loop_ubound0 = get_loop_upper_bound_for_array (ss, 0); |
| |
| if (expr->shape && get_rank (loop) > 1 && *loop_ubound0 == NULL_TREE) |
| { |
| /* We have a multidimensional parameter. */ |
| for (s = ss; s; s = s->parent) |
| { |
| int n; |
| for (n = 0; n < s->loop->dimen; n++) |
| { |
| s->loop->from[n] = gfc_index_zero_node; |
| s->loop->to[n] = gfc_conv_mpz_to_tree (expr->shape[s->dim[n]], |
| gfc_index_integer_kind); |
| s->loop->to[n] = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| s->loop->to[n], |
| gfc_index_one_node); |
| } |
| } |
| } |
| |
| if (*loop_ubound0 == NULL_TREE) |
| { |
| mpz_t size; |
| |
| /* We should have a 1-dimensional, zero-based loop. */ |
| gcc_assert (loop->parent == NULL && loop->nested == NULL); |
| gcc_assert (loop->dimen == 1); |
| gcc_assert (integer_zerop (loop->from[0])); |
| |
| /* Split the constructor size into a static part and a dynamic part. |
| Allocate the static size up-front and record whether the dynamic |
| size might be nonzero. */ |
| mpz_init (size); |
| dynamic = gfc_get_array_constructor_size (&size, c); |
| mpz_sub_ui (size, size, 1); |
| loop->to[0] = gfc_conv_mpz_to_tree (size, gfc_index_integer_kind); |
| mpz_clear (size); |
| } |
| |
| /* Special case constant array constructors. */ |
| if (!dynamic) |
| { |
| unsigned HOST_WIDE_INT nelem = gfc_constant_array_constructor_p (c); |
| if (nelem > 0) |
| { |
| tree size = constant_array_constructor_loop_size (loop); |
| if (size && compare_tree_int (size, nelem) == 0) |
| { |
| trans_constant_array_constructor (ss, type); |
| goto finish; |
| } |
| } |
| } |
| |
| gfc_trans_create_temp_array (&outer_loop->pre, &outer_loop->post, ss, type, |
| NULL_TREE, dynamic, true, false, where); |
| |
| desc = ss_info->data.array.descriptor; |
| offset = gfc_index_zero_node; |
| offsetvar = gfc_create_var_np (gfc_array_index_type, "offset"); |
| TREE_NO_WARNING (offsetvar) = 1; |
| TREE_USED (offsetvar) = 0; |
| gfc_trans_array_constructor_value (&outer_loop->pre, type, desc, c, |
| &offset, &offsetvar, dynamic); |
| |
| /* If the array grows dynamically, the upper bound of the loop variable |
| is determined by the array's final upper bound. */ |
| if (dynamic) |
| { |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| offsetvar, gfc_index_one_node); |
| tmp = gfc_evaluate_now (tmp, &outer_loop->pre); |
| gfc_conv_descriptor_ubound_set (&loop->pre, desc, gfc_rank_cst[0], tmp); |
| if (*loop_ubound0 && VAR_P (*loop_ubound0)) |
| gfc_add_modify (&outer_loop->pre, *loop_ubound0, tmp); |
| else |
| *loop_ubound0 = tmp; |
| } |
| |
| if (TREE_USED (offsetvar)) |
| pushdecl (offsetvar); |
| else |
| gcc_assert (INTEGER_CST_P (offset)); |
| |
| #if 0 |
| /* Disable bound checking for now because it's probably broken. */ |
| if (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS) |
| { |
| gcc_unreachable (); |
| } |
| #endif |
| |
| finish: |
| /* Restore old values of globals. */ |
| first_len = old_first_len; |
| first_len_val = old_first_len_val; |
| typespec_chararray_ctor = old_typespec_chararray_ctor; |
| } |
| |
| |
| /* INFO describes a GFC_SS_SECTION in loop LOOP, and this function is |
| called after evaluating all of INFO's vector dimensions. Go through |
| each such vector dimension and see if we can now fill in any missing |
| loop bounds. */ |
| |
| static void |
| set_vector_loop_bounds (gfc_ss * ss) |
| { |
| gfc_loopinfo *loop, *outer_loop; |
| gfc_array_info *info; |
| gfc_se se; |
| tree tmp; |
| tree desc; |
| tree zero; |
| int n; |
| int dim; |
| |
| outer_loop = outermost_loop (ss->loop); |
| |
| info = &ss->info->data.array; |
| |
| for (; ss; ss = ss->parent) |
| { |
| loop = ss->loop; |
| |
| for (n = 0; n < loop->dimen; n++) |
| { |
| dim = ss->dim[n]; |
| if (info->ref->u.ar.dimen_type[dim] != DIMEN_VECTOR |
| || loop->to[n] != NULL) |
| continue; |
| |
| /* Loop variable N indexes vector dimension DIM, and we don't |
| yet know the upper bound of loop variable N. Set it to the |
| difference between the vector's upper and lower bounds. */ |
| gcc_assert (loop->from[n] == gfc_index_zero_node); |
| gcc_assert (info->subscript[dim] |
| && info->subscript[dim]->info->type == GFC_SS_VECTOR); |
| |
| gfc_init_se (&se, NULL); |
| desc = info->subscript[dim]->info->data.array.descriptor; |
| zero = gfc_rank_cst[0]; |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| gfc_conv_descriptor_ubound_get (desc, zero), |
| gfc_conv_descriptor_lbound_get (desc, zero)); |
| tmp = gfc_evaluate_now (tmp, &outer_loop->pre); |
| loop->to[n] = tmp; |
| } |
| } |
| } |
| |
| |
| /* Tells whether a scalar argument to an elemental procedure is saved out |
| of a scalarization loop as a value or as a reference. */ |
| |
| bool |
| gfc_scalar_elemental_arg_saved_as_reference (gfc_ss_info * ss_info) |
| { |
| if (ss_info->type != GFC_SS_REFERENCE) |
| return false; |
| |
| /* If the actual argument can be absent (in other words, it can |
| be a NULL reference), don't try to evaluate it; pass instead |
| the reference directly. */ |
| if (ss_info->can_be_null_ref) |
| return true; |
| |
| /* If the expression is of polymorphic type, it's actual size is not known, |
| so we avoid copying it anywhere. */ |
| if (ss_info->data.scalar.dummy_arg |
| && ss_info->data.scalar.dummy_arg->ts.type == BT_CLASS |
| && ss_info->expr->ts.type == BT_CLASS) |
| return true; |
| |
| /* If the expression is a data reference of aggregate type, |
| and the data reference is not used on the left hand side, |
| avoid a copy by saving a reference to the content. */ |
| if (!ss_info->data.scalar.needs_temporary |
| && (ss_info->expr->ts.type == BT_DERIVED |
| || ss_info->expr->ts.type == BT_CLASS) |
| && gfc_expr_is_variable (ss_info->expr)) |
| return true; |
| |
| /* Otherwise the expression is evaluated to a temporary variable before the |
| scalarization loop. */ |
| return false; |
| } |
| |
| |
| /* Add the pre and post chains for all the scalar expressions in a SS chain |
| to loop. This is called after the loop parameters have been calculated, |
| but before the actual scalarizing loops. */ |
| |
| static void |
| gfc_add_loop_ss_code (gfc_loopinfo * loop, gfc_ss * ss, bool subscript, |
| locus * where) |
| { |
| gfc_loopinfo *nested_loop, *outer_loop; |
| gfc_se se; |
| gfc_ss_info *ss_info; |
| gfc_array_info *info; |
| gfc_expr *expr; |
| int n; |
| |
| /* Don't evaluate the arguments for realloc_lhs_loop_for_fcn_call; otherwise, |
| arguments could get evaluated multiple times. */ |
| if (ss->is_alloc_lhs) |
| return; |
| |
| outer_loop = outermost_loop (loop); |
| |
| /* TODO: This can generate bad code if there are ordering dependencies, |
| e.g., a callee allocated function and an unknown size constructor. */ |
| gcc_assert (ss != NULL); |
| |
| for (; ss != gfc_ss_terminator; ss = ss->loop_chain) |
| { |
| gcc_assert (ss); |
| |
| /* Cross loop arrays are handled from within the most nested loop. */ |
| if (ss->nested_ss != NULL) |
| continue; |
| |
| ss_info = ss->info; |
| expr = ss_info->expr; |
| info = &ss_info->data.array; |
| |
| switch (ss_info->type) |
| { |
| case GFC_SS_SCALAR: |
| /* Scalar expression. Evaluate this now. This includes elemental |
| dimension indices, but not array section bounds. */ |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr (&se, expr); |
| gfc_add_block_to_block (&outer_loop->pre, &se.pre); |
| |
| if (expr->ts.type != BT_CHARACTER |
| && !gfc_is_alloc_class_scalar_function (expr)) |
| { |
| /* Move the evaluation of scalar expressions outside the |
| scalarization loop, except for WHERE assignments. */ |
| if (subscript) |
| se.expr = convert(gfc_array_index_type, se.expr); |
| if (!ss_info->where) |
| se.expr = gfc_evaluate_now (se.expr, &outer_loop->pre); |
| gfc_add_block_to_block (&outer_loop->pre, &se.post); |
| } |
| else |
| gfc_add_block_to_block (&outer_loop->post, &se.post); |
| |
| ss_info->data.scalar.value = se.expr; |
| ss_info->string_length = se.string_length; |
| break; |
| |
| case GFC_SS_REFERENCE: |
| /* Scalar argument to elemental procedure. */ |
| gfc_init_se (&se, NULL); |
| if (gfc_scalar_elemental_arg_saved_as_reference (ss_info)) |
| gfc_conv_expr_reference (&se, expr); |
| else |
| { |
| /* Evaluate the argument outside the loop and pass |
| a reference to the value. */ |
| gfc_conv_expr (&se, expr); |
| } |
| |
| /* Ensure that a pointer to the string is stored. */ |
| if (expr->ts.type == BT_CHARACTER) |
| gfc_conv_string_parameter (&se); |
| |
| gfc_add_block_to_block (&outer_loop->pre, &se.pre); |
| gfc_add_block_to_block (&outer_loop->post, &se.post); |
| if (gfc_is_class_scalar_expr (expr)) |
| /* This is necessary because the dynamic type will always be |
| large than the declared type. In consequence, assigning |
| the value to a temporary could segfault. |
| OOP-TODO: see if this is generally correct or is the value |
| has to be written to an allocated temporary, whose address |
| is passed via ss_info. */ |
| ss_info->data.scalar.value = se.expr; |
| else |
| ss_info->data.scalar.value = gfc_evaluate_now (se.expr, |
| &outer_loop->pre); |
| |
| ss_info->string_length = se.string_length; |
| break; |
| |
| case GFC_SS_SECTION: |
| /* Add the expressions for scalar and vector subscripts. */ |
| for (n = 0; n < GFC_MAX_DIMENSIONS; n++) |
| if (info->subscript[n]) |
| gfc_add_loop_ss_code (loop, info->subscript[n], true, where); |
| |
| set_vector_loop_bounds (ss); |
| break; |
| |
| case GFC_SS_VECTOR: |
| /* Get the vector's descriptor and store it in SS. */ |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_descriptor (&se, expr); |
| gfc_add_block_to_block (&outer_loop->pre, &se.pre); |
| gfc_add_block_to_block (&outer_loop->post, &se.post); |
| info->descriptor = se.expr; |
| break; |
| |
| case GFC_SS_INTRINSIC: |
| gfc_add_intrinsic_ss_code (loop, ss); |
| break; |
| |
| case GFC_SS_FUNCTION: |
| /* Array function return value. We call the function and save its |
| result in a temporary for use inside the loop. */ |
| gfc_init_se (&se, NULL); |
| se.loop = loop; |
| se.ss = ss; |
| if (gfc_is_class_array_function (expr)) |
| expr->must_finalize = 1; |
| gfc_conv_expr (&se, expr); |
| gfc_add_block_to_block (&outer_loop->pre, &se.pre); |
| gfc_add_block_to_block (&outer_loop->post, &se.post); |
| ss_info->string_length = se.string_length; |
| break; |
| |
| case GFC_SS_CONSTRUCTOR: |
| if (expr->ts.type == BT_CHARACTER |
| && ss_info->string_length == NULL |
| && expr->ts.u.cl |
| && expr->ts.u.cl->length |
| && expr->ts.u.cl->length->expr_type == EXPR_CONSTANT) |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_type (&se, expr->ts.u.cl->length, |
| gfc_charlen_type_node); |
| ss_info->string_length = se.expr; |
| gfc_add_block_to_block (&outer_loop->pre, &se.pre); |
| gfc_add_block_to_block (&outer_loop->post, &se.post); |
| } |
| trans_array_constructor (ss, where); |
| break; |
| |
| case GFC_SS_TEMP: |
| case GFC_SS_COMPONENT: |
| /* Do nothing. These are handled elsewhere. */ |
| break; |
| |
| default: |
| gcc_unreachable (); |
| } |
| } |
| |
| if (!subscript) |
| for (nested_loop = loop->nested; nested_loop; |
| nested_loop = nested_loop->next) |
| gfc_add_loop_ss_code (nested_loop, nested_loop->ss, subscript, where); |
| } |
| |
| |
| /* Translate expressions for the descriptor and data pointer of a SS. */ |
| /*GCC ARRAYS*/ |
| |
| static void |
| gfc_conv_ss_descriptor (stmtblock_t * block, gfc_ss * ss, int base) |
| { |
| gfc_se se; |
| gfc_ss_info *ss_info; |
| gfc_array_info *info; |
| tree tmp; |
| |
| ss_info = ss->info; |
| info = &ss_info->data.array; |
| |
| /* Get the descriptor for the array to be scalarized. */ |
| gcc_assert (ss_info->expr->expr_type == EXPR_VARIABLE); |
| gfc_init_se (&se, NULL); |
| se.descriptor_only = 1; |
| gfc_conv_expr_lhs (&se, ss_info->expr); |
| gfc_add_block_to_block (block, &se.pre); |
| info->descriptor = se.expr; |
| ss_info->string_length = se.string_length; |
| |
| if (base) |
| { |
| if (ss_info->expr->ts.type == BT_CHARACTER && !ss_info->expr->ts.deferred |
| && ss_info->expr->ts.u.cl->length == NULL) |
| { |
| /* Emit a DECL_EXPR for the variable sized array type in |
| GFC_TYPE_ARRAY_DATAPTR_TYPE so the gimplification of its type |
| sizes works correctly. */ |
| tree arraytype = TREE_TYPE ( |
| GFC_TYPE_ARRAY_DATAPTR_TYPE (TREE_TYPE (info->descriptor))); |
| if (! TYPE_NAME (arraytype)) |
| TYPE_NAME (arraytype) = build_decl (UNKNOWN_LOCATION, TYPE_DECL, |
| NULL_TREE, arraytype); |
| gfc_add_expr_to_block (block, build1 (DECL_EXPR, arraytype, |
| TYPE_NAME (arraytype))); |
| } |
| /* Also the data pointer. */ |
| tmp = gfc_conv_array_data (se.expr); |
| /* If this is a variable or address of a variable we use it directly. |
| Otherwise we must evaluate it now to avoid breaking dependency |
| analysis by pulling the expressions for elemental array indices |
| inside the loop. */ |
| if (!(DECL_P (tmp) |
| || (TREE_CODE (tmp) == ADDR_EXPR |
| && DECL_P (TREE_OPERAND (tmp, 0))))) |
| tmp = gfc_evaluate_now (tmp, block); |
| info->data = tmp; |
| |
| tmp = gfc_conv_array_offset (se.expr); |
| info->offset = gfc_evaluate_now (tmp, block); |
| |
| /* Make absolutely sure that the saved_offset is indeed saved |
| so that the variable is still accessible after the loops |
| are translated. */ |
| info->saved_offset = info->offset; |
| } |
| } |
| |
| |
| /* Initialize a gfc_loopinfo structure. */ |
| |
| void |
| gfc_init_loopinfo (gfc_loopinfo * loop) |
| { |
| int n; |
| |
| memset (loop, 0, sizeof (gfc_loopinfo)); |
| gfc_init_block (&loop->pre); |
| gfc_init_block (&loop->post); |
| |
| /* Initially scalarize in order and default to no loop reversal. */ |
| for (n = 0; n < GFC_MAX_DIMENSIONS; n++) |
| { |
| loop->order[n] = n; |
| loop->reverse[n] = GFC_INHIBIT_REVERSE; |
| } |
| |
| loop->ss = gfc_ss_terminator; |
| } |
| |
| |
| /* Copies the loop variable info to a gfc_se structure. Does not copy the SS |
| chain. */ |
| |
| void |
| gfc_copy_loopinfo_to_se (gfc_se * se, gfc_loopinfo * loop) |
| { |
| se->loop = loop; |
| } |
| |
| |
| /* Return an expression for the data pointer of an array. */ |
| |
| tree |
| gfc_conv_array_data (tree descriptor) |
| { |
| tree type; |
| |
| type = TREE_TYPE (descriptor); |
| if (GFC_ARRAY_TYPE_P (type)) |
| { |
| if (TREE_CODE (type) == POINTER_TYPE) |
| return descriptor; |
| else |
| { |
| /* Descriptorless arrays. */ |
| return gfc_build_addr_expr (NULL_TREE, descriptor); |
| } |
| } |
| else |
| return gfc_conv_descriptor_data_get (descriptor); |
| } |
| |
| |
| /* Return an expression for the base offset of an array. */ |
| |
| tree |
| gfc_conv_array_offset (tree descriptor) |
| { |
| tree type; |
| |
| type = TREE_TYPE (descriptor); |
| if (GFC_ARRAY_TYPE_P (type)) |
| return GFC_TYPE_ARRAY_OFFSET (type); |
| else |
| return gfc_conv_descriptor_offset_get (descriptor); |
| } |
| |
| |
| /* Get an expression for the array stride. */ |
| |
| tree |
| gfc_conv_array_stride (tree descriptor, int dim) |
| { |
| tree tmp; |
| tree type; |
| |
| type = TREE_TYPE (descriptor); |
| |
| /* For descriptorless arrays use the array size. */ |
| tmp = GFC_TYPE_ARRAY_STRIDE (type, dim); |
| if (tmp != NULL_TREE) |
| return tmp; |
| |
| tmp = gfc_conv_descriptor_stride_get (descriptor, gfc_rank_cst[dim]); |
| return tmp; |
| } |
| |
| |
| /* Like gfc_conv_array_stride, but for the lower bound. */ |
| |
| tree |
| gfc_conv_array_lbound (tree descriptor, int dim) |
| { |
| tree tmp; |
| tree type; |
| |
| type = TREE_TYPE (descriptor); |
| |
| tmp = GFC_TYPE_ARRAY_LBOUND (type, dim); |
| if (tmp != NULL_TREE) |
| return tmp; |
| |
| tmp = gfc_conv_descriptor_lbound_get (descriptor, gfc_rank_cst[dim]); |
| return tmp; |
| } |
| |
| |
| /* Like gfc_conv_array_stride, but for the upper bound. */ |
| |
| tree |
| gfc_conv_array_ubound (tree descriptor, int dim) |
| { |
| tree tmp; |
| tree type; |
| |
| type = TREE_TYPE (descriptor); |
| |
| tmp = GFC_TYPE_ARRAY_UBOUND (type, dim); |
| if (tmp != NULL_TREE) |
| return tmp; |
| |
| /* This should only ever happen when passing an assumed shape array |
| as an actual parameter. The value will never be used. */ |
| if (GFC_ARRAY_TYPE_P (TREE_TYPE (descriptor))) |
| return gfc_index_zero_node; |
| |
| tmp = gfc_conv_descriptor_ubound_get (descriptor, gfc_rank_cst[dim]); |
| return tmp; |
| } |
| |
| |
| /* Generate code to perform an array index bound check. */ |
| |
| static tree |
| trans_array_bound_check (gfc_se * se, gfc_ss *ss, tree index, int n, |
| locus * where, bool check_upper) |
| { |
| tree fault; |
| tree tmp_lo, tmp_up; |
| tree descriptor; |
| char *msg; |
| const char * name = NULL; |
| |
| if (!(gfc_option.rtcheck & GFC_RTCHECK_BOUNDS)) |
| return index; |
| |
| descriptor = ss->info->data.array.descriptor; |
| |
| index = gfc_evaluate_now (index, &se->pre); |
| |
| /* We find a name for the error message. */ |
| name = ss->info->expr->symtree->n.sym->name; |
| gcc_assert (name != NULL); |
| |
| if (VAR_P (descriptor)) |
| name = IDENTIFIER_POINTER (DECL_NAME (descriptor)); |
| |
| /* If upper bound is present, include both bounds in the error message. */ |
| if (check_upper) |
| { |
| tmp_lo = gfc_conv_array_lbound (descriptor, n); |
| tmp_up = gfc_conv_array_ubound (descriptor, n); |
| |
| if (name) |
| msg = xasprintf ("Index '%%ld' of dimension %d of array '%s' " |
| "outside of expected range (%%ld:%%ld)", n+1, name); |
| else |
| msg = xasprintf ("Index '%%ld' of dimension %d " |
| "outside of expected range (%%ld:%%ld)", n+1); |
| |
| fault = fold_build2_loc (input_location, LT_EXPR, logical_type_node, |
| index, tmp_lo); |
| gfc_trans_runtime_check (true, false, fault, &se->pre, where, msg, |
| fold_convert (long_integer_type_node, index), |
| fold_convert (long_integer_type_node, tmp_lo), |
| fold_convert (long_integer_type_node, tmp_up)); |
| fault = fold_build2_loc (input_location, GT_EXPR, logical_type_node, |
| index, tmp_up); |
| gfc_trans_runtime_check (true, false, fault, &se->pre, where, msg, |
| fold_convert (long_integer_type_node, index), |
| fold_convert (long_integer_type_node, tmp_lo), |
| fold_convert (long_integer_type_node, tmp_up)); |
| free (msg); |
| } |
| else |
| { |
| tmp_lo = gfc_conv_array_lbound (descriptor, n); |
| |
| if (name) |
| msg = xasprintf ("Index '%%ld' of dimension %d of array '%s' " |
| "below lower bound of %%ld", n+1, name); |
| else |
| msg = xasprintf ("Index '%%ld' of dimension %d " |
| "below lower bound of %%ld", n+1); |
| |
| fault = fold_build2_loc (input_location, LT_EXPR, logical_type_node, |
| index, tmp_lo); |
| gfc_trans_runtime_check (true, false, fault, &se->pre, where, msg, |
| fold_convert (long_integer_type_node, index), |
| fold_convert (long_integer_type_node, tmp_lo)); |
| free (msg); |
| } |
| |
| return index; |
| } |
| |
| |
| /* Return the offset for an index. Performs bound checking for elemental |
| dimensions. Single element references are processed separately. |
| DIM is the array dimension, I is the loop dimension. */ |
| |
| static tree |
| conv_array_index_offset (gfc_se * se, gfc_ss * ss, int dim, int i, |
| gfc_array_ref * ar, tree stride) |
| { |
| gfc_array_info *info; |
| tree index; |
| tree desc; |
| tree data; |
| |
| info = &ss->info->data.array; |
| |
| /* Get the index into the array for this dimension. */ |
| if (ar) |
| { |
| gcc_assert (ar->type != AR_ELEMENT); |
| switch (ar->dimen_type[dim]) |
| { |
| case DIMEN_THIS_IMAGE: |
| gcc_unreachable (); |
| break; |
| case DIMEN_ELEMENT: |
| /* Elemental dimension. */ |
| gcc_assert (info->subscript[dim] |
| && info->subscript[dim]->info->type == GFC_SS_SCALAR); |
| /* We've already translated this value outside the loop. */ |
| index = info->subscript[dim]->info->data.scalar.value; |
| |
| index = trans_array_bound_check (se, ss, index, dim, &ar->where, |
| ar->as->type != AS_ASSUMED_SIZE |
| || dim < ar->dimen - 1); |
| break; |
| |
| case DIMEN_VECTOR: |
| gcc_assert (info && se->loop); |
| gcc_assert (info->subscript[dim] |
| && info->subscript[dim]->info->type == GFC_SS_VECTOR); |
| desc = info->subscript[dim]->info->data.array.descriptor; |
| |
| /* Get a zero-based index into the vector. */ |
| index = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| se->loop->loopvar[i], se->loop->from[i]); |
| |
| /* Multiply the index by the stride. */ |
| index = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, |
| index, gfc_conv_array_stride (desc, 0)); |
| |
| /* Read the vector to get an index into info->descriptor. */ |
| data = build_fold_indirect_ref_loc (input_location, |
| gfc_conv_array_data (desc)); |
| index = gfc_build_array_ref (data, index, NULL); |
| index = gfc_evaluate_now (index, &se->pre); |
| index = fold_convert (gfc_array_index_type, index); |
| |
| /* Do any bounds checking on the final info->descriptor index. */ |
| index = trans_array_bound_check (se, ss, index, dim, &ar->where, |
| ar->as->type != AS_ASSUMED_SIZE |
| || dim < ar->dimen - 1); |
| break; |
| |
| case DIMEN_RANGE: |
| /* Scalarized dimension. */ |
| gcc_assert (info && se->loop); |
| |
| /* Multiply the loop variable by the stride and delta. */ |
| index = se->loop->loopvar[i]; |
| if (!integer_onep (info->stride[dim])) |
| index = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, index, |
| info->stride[dim]); |
| if (!integer_zerop (info->delta[dim])) |
| index = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, index, |
| info->delta[dim]); |
| break; |
| |
| default: |
| gcc_unreachable (); |
| } |
| } |
| else |
| { |
| /* Temporary array or derived type component. */ |
| gcc_assert (se->loop); |
| index = se->loop->loopvar[se->loop->order[i]]; |
| |
| /* Pointer functions can have stride[0] different from unity. |
| Use the stride returned by the function call and stored in |
| the descriptor for the temporary. */ |
| if (se->ss && se->ss->info->type == GFC_SS_FUNCTION |
| && se->ss->info->expr |
| && se->ss->info->expr->symtree |
| && se->ss->info->expr->symtree->n.sym->result |
| && se->ss->info->expr->symtree->n.sym->result->attr.pointer) |
| stride = gfc_conv_descriptor_stride_get (info->descriptor, |
| gfc_rank_cst[dim]); |
| |
| if (info->delta[dim] && !integer_zerop (info->delta[dim])) |
| index = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, index, info->delta[dim]); |
| } |
| |
| /* Multiply by the stride. */ |
| if (stride != NULL && !integer_onep (stride)) |
| index = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type, |
| index, stride); |
| |
| return index; |
| } |
| |
| |
| /* Build a scalarized array reference using the vptr 'size'. */ |
| |
| static bool |
| build_class_array_ref (gfc_se *se, tree base, tree index) |
| { |
| tree type; |
| tree size; |
| tree offset; |
| tree decl = NULL_TREE; |
| tree tmp; |
| gfc_expr *expr = se->ss->info->expr; |
| gfc_ref *ref; |
| gfc_ref *class_ref = NULL; |
| gfc_typespec *ts; |
| |
| if (se->expr && DECL_P (se->expr) && DECL_LANG_SPECIFIC (se->expr) |
| && GFC_DECL_SAVED_DESCRIPTOR (se->expr) |
| && GFC_CLASS_TYPE_P (TREE_TYPE (GFC_DECL_SAVED_DESCRIPTOR (se->expr)))) |
| decl = se->expr; |
| else |
| { |
| if (expr == NULL |
| || (expr->ts.type != BT_CLASS |
| && !gfc_is_class_array_function (expr) |
| && !gfc_is_class_array_ref (expr, NULL))) |
| return false; |
| |
| if (expr->symtree && expr->symtree->n.sym->ts.type == BT_CLASS) |
| ts = &expr->symtree->n.sym->ts; |
| else |
| ts = NULL; |
| |
| for (ref = expr->ref; ref; ref = ref->next) |
| { |
| if (ref->type == REF_COMPONENT |
| && ref->u.c.component->ts.type == BT_CLASS |
| && ref->next && ref->next->type == REF_COMPONENT |
| && strcmp (ref->next->u.c.component->name, "_data") == 0 |
| && ref->next->next |
| && ref->next->next->type == REF_ARRAY |
| && ref->next->next->u.ar.type != AR_ELEMENT) |
| { |
| ts = &ref->u.c.component->ts; |
| class_ref = ref; |
| break; |
| } |
| } |
| |
| if (ts == NULL) |
| return false; |
| } |
| |
| if (class_ref == NULL && expr && expr->symtree->n.sym->attr.function |
| && expr->symtree->n.sym == expr->symtree->n.sym->result |
| && expr->symtree->n.sym->backend_decl == current_function_decl) |
| { |
| decl = gfc_get_fake_result_decl (expr->symtree->n.sym, 0); |
| } |
| else if (expr && gfc_is_class_array_function (expr)) |
| { |
| size = NULL_TREE; |
| decl = NULL_TREE; |
| for (tmp = base; tmp; tmp = TREE_OPERAND (tmp, 0)) |
| { |
| tree type; |
| type = TREE_TYPE (tmp); |
| while (type) |
| { |
| if (GFC_CLASS_TYPE_P (type)) |
| decl = tmp; |
| if (type != TYPE_CANONICAL (type)) |
| type = TYPE_CANONICAL (type); |
| else |
| type = NULL_TREE; |
| } |
| if (VAR_P (tmp)) |
| break; |
| } |
| |
| if (decl == NULL_TREE) |
| return false; |
| |
| se->class_vptr = gfc_evaluate_now (gfc_class_vptr_get (decl), &se->pre); |
| } |
| else if (class_ref == NULL) |
| { |
| if (decl == NULL_TREE) |
| decl = expr->symtree->n.sym->backend_decl; |
| /* For class arrays the tree containing the class is stored in |
| GFC_DECL_SAVED_DESCRIPTOR of the sym's backend_decl. |
| For all others it's sym's backend_decl directly. */ |
| if (DECL_LANG_SPECIFIC (decl) && GFC_DECL_SAVED_DESCRIPTOR (decl)) |
| decl = GFC_DECL_SAVED_DESCRIPTOR (decl); |
| } |
| else |
| { |
| /* Remove everything after the last class reference, convert the |
| expression and then recover its tailend once more. */ |
| gfc_se tmpse; |
| ref = class_ref->next; |
| class_ref->next = NULL; |
| gfc_init_se (&tmpse, NULL); |
| gfc_conv_expr (&tmpse, expr); |
| gfc_add_block_to_block (&se->pre, &tmpse.pre); |
| decl = tmpse.expr; |
| class_ref->next = ref; |
| } |
| |
| if (POINTER_TYPE_P (TREE_TYPE (decl))) |
| decl = build_fold_indirect_ref_loc (input_location, decl); |
| |
| if (!GFC_CLASS_TYPE_P (TREE_TYPE (decl))) |
| return false; |
| |
| size = gfc_class_vtab_size_get (decl); |
| |
| /* For unlimited polymorphic entities then _len component needs to be |
| multiplied with the size. If no _len component is present, then |
| gfc_class_len_or_zero_get () return a zero_node. */ |
| tmp = gfc_class_len_or_zero_get (decl); |
| if (!integer_zerop (tmp)) |
| size = fold_build2 (MULT_EXPR, TREE_TYPE (index), |
| fold_convert (TREE_TYPE (index), size), |
| fold_build2 (MAX_EXPR, TREE_TYPE (index), |
| fold_convert (TREE_TYPE (index), tmp), |
| fold_convert (TREE_TYPE (index), |
| integer_one_node))); |
| else |
| size = fold_convert (TREE_TYPE (index), size); |
| |
| /* Build the address of the element. */ |
| type = TREE_TYPE (TREE_TYPE (base)); |
| offset = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, |
| index, size); |
| tmp = gfc_build_addr_expr (pvoid_type_node, base); |
| tmp = fold_build_pointer_plus_loc (input_location, tmp, offset); |
| tmp = fold_convert (build_pointer_type (type), tmp); |
| |
| /* Return the element in the se expression. */ |
| se->expr = build_fold_indirect_ref_loc (input_location, tmp); |
| return true; |
| } |
| |
| |
| /* Build a scalarized reference to an array. */ |
| |
| static void |
| gfc_conv_scalarized_array_ref (gfc_se * se, gfc_array_ref * ar) |
| { |
| gfc_array_info *info; |
| tree decl = NULL_TREE; |
| tree index; |
| tree base; |
| gfc_ss *ss; |
| gfc_expr *expr; |
| int n; |
| |
| ss = se->ss; |
| expr = ss->info->expr; |
| info = &ss->info->data.array; |
| if (ar) |
| n = se->loop->order[0]; |
| else |
| n = 0; |
| |
| index = conv_array_index_offset (se, ss, ss->dim[n], n, ar, info->stride0); |
| /* Add the offset for this dimension to the stored offset for all other |
| dimensions. */ |
| if (info->offset && !integer_zerop (info->offset)) |
| index = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type, |
| index, info->offset); |
| |
| base = build_fold_indirect_ref_loc (input_location, info->data); |
| |
| /* Use the vptr 'size' field to access the element of a class array. */ |
| if (build_class_array_ref (se, base, index)) |
| return; |
| |
| if (expr && ((is_subref_array (expr) |
| && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (info->descriptor))) |
| || (expr->ts.deferred && (expr->expr_type == EXPR_VARIABLE |
| || expr->expr_type == EXPR_FUNCTION)))) |
| decl = expr->symtree->n.sym->backend_decl; |
| |
| /* A pointer array component can be detected from its field decl. Fix |
| the descriptor, mark the resulting variable decl and pass it to |
| gfc_build_array_ref. */ |
| if (is_pointer_array (info->descriptor)) |
| { |
| if (TREE_CODE (info->descriptor) == COMPONENT_REF) |
| { |
| decl = gfc_evaluate_now (info->descriptor, &se->pre); |
| GFC_DECL_PTR_ARRAY_P (decl) = 1; |
| TREE_USED (decl) = 1; |
| } |
| else if (TREE_CODE (info->descriptor) == INDIRECT_REF) |
| decl = TREE_OPERAND (info->descriptor, 0); |
| |
| if (decl == NULL_TREE) |
| decl = info->descriptor; |
| } |
| |
| se->expr = gfc_build_array_ref (base, index, decl); |
| } |
| |
| |
| /* Translate access of temporary array. */ |
| |
| void |
| gfc_conv_tmp_array_ref (gfc_se * se) |
| { |
| se->string_length = se->ss->info->string_length; |
| gfc_conv_scalarized_array_ref (se, NULL); |
| gfc_advance_se_ss_chain (se); |
| } |
| |
| /* Add T to the offset pair *OFFSET, *CST_OFFSET. */ |
| |
| static void |
| add_to_offset (tree *cst_offset, tree *offset, tree t) |
| { |
| if (TREE_CODE (t) == INTEGER_CST) |
| *cst_offset = int_const_binop (PLUS_EXPR, *cst_offset, t); |
| else |
| { |
| if (!integer_zerop (*offset)) |
| *offset = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, *offset, t); |
| else |
| *offset = t; |
| } |
| } |
| |
| |
| static tree |
| build_array_ref (tree desc, tree offset, tree decl, tree vptr) |
| { |
| tree tmp; |
| tree type; |
| tree cdesc; |
| |
| /* For class arrays the class declaration is stored in the saved |
| descriptor. */ |
| if (INDIRECT_REF_P (desc) |
| && DECL_LANG_SPECIFIC (TREE_OPERAND (desc, 0)) |
| && GFC_DECL_SAVED_DESCRIPTOR (TREE_OPERAND (desc, 0))) |
| cdesc = gfc_class_data_get (GFC_DECL_SAVED_DESCRIPTOR ( |
| TREE_OPERAND (desc, 0))); |
| else |
| cdesc = desc; |
| |
| /* Class container types do not always have the GFC_CLASS_TYPE_P |
| but the canonical type does. */ |
| if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (cdesc)) |
| && TREE_CODE (cdesc) == COMPONENT_REF) |
| { |
| type = TREE_TYPE (TREE_OPERAND (cdesc, 0)); |
| if (TYPE_CANONICAL (type) |
| && GFC_CLASS_TYPE_P (TYPE_CANONICAL (type))) |
| vptr = gfc_class_vptr_get (TREE_OPERAND (cdesc, 0)); |
| } |
| |
| tmp = gfc_conv_array_data (desc); |
| tmp = build_fold_indirect_ref_loc (input_location, tmp); |
| tmp = gfc_build_array_ref (tmp, offset, decl, vptr); |
| return tmp; |
| } |
| |
| |
| /* Build an array reference. se->expr already holds the array descriptor. |
| This should be either a variable, indirect variable reference or component |
| reference. For arrays which do not have a descriptor, se->expr will be |
| the data pointer. |
| a(i, j, k) = base[offset + i * stride[0] + j * stride[1] + k * stride[2]]*/ |
| |
| void |
| gfc_conv_array_ref (gfc_se * se, gfc_array_ref * ar, gfc_expr *expr, |
| locus * where) |
| { |
| int n; |
| tree offset, cst_offset; |
| tree tmp; |
| tree stride; |
| tree decl = NULL_TREE; |
| gfc_se indexse; |
| gfc_se tmpse; |
| gfc_symbol * sym = expr->symtree->n.sym; |
| char *var_name = NULL; |
| |
| if (ar->dimen == 0) |
| { |
| gcc_assert (ar->codimen); |
| |
| if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (se->expr))) |
| se->expr = build_fold_indirect_ref (gfc_conv_array_data (se->expr)); |
| else |
| { |
| if (GFC_ARRAY_TYPE_P (TREE_TYPE (se->expr)) |
| && TREE_CODE (TREE_TYPE (se->expr)) == POINTER_TYPE) |
| se->expr = build_fold_indirect_ref_loc (input_location, se->expr); |
| |
| /* Use the actual tree type and not the wrapped coarray. */ |
| if (!se->want_pointer) |
| se->expr = fold_convert (TYPE_MAIN_VARIANT (TREE_TYPE (se->expr)), |
| se->expr); |
| } |
| |
| return; |
| } |
| |
| /* Handle scalarized references separately. */ |
| if (ar->type != AR_ELEMENT) |
| { |
| gfc_conv_scalarized_array_ref (se, ar); |
| gfc_advance_se_ss_chain (se); |
| return; |
| } |
| |
| if (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS) |
| { |
| size_t len; |
| gfc_ref *ref; |
| |
| len = strlen (sym->name) + 1; |
| for (ref = expr->ref; ref; ref = ref->next) |
| { |
| if (ref->type == REF_ARRAY && &ref->u.ar == ar) |
| break; |
| if (ref->type == REF_COMPONENT) |
| len += 2 + strlen (ref->u.c.component->name); |
| } |
| |
| var_name = XALLOCAVEC (char, len); |
| strcpy (var_name, sym->name); |
| |
| for (ref = expr->ref; ref; ref = ref->next) |
| { |
| if (ref->type == REF_ARRAY && &ref->u.ar == ar) |
| break; |
| if (ref->type == REF_COMPONENT) |
| { |
| strcat (var_name, "%%"); |
| strcat (var_name, ref->u.c.component->name); |
| } |
| } |
| } |
| |
| cst_offset = offset = gfc_index_zero_node; |
| add_to_offset (&cst_offset, &offset, gfc_conv_array_offset (se->expr)); |
| |
| /* Calculate the offsets from all the dimensions. Make sure to associate |
| the final offset so that we form a chain of loop invariant summands. */ |
| for (n = ar->dimen - 1; n >= 0; n--) |
| { |
| /* Calculate the index for this dimension. */ |
| gfc_init_se (&indexse, se); |
| gfc_conv_expr_type (&indexse, ar->start[n], gfc_array_index_type); |
| gfc_add_block_to_block (&se->pre, &indexse.pre); |
| |
| if (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS) |
| { |
| /* Check array bounds. */ |
| tree cond; |
| char *msg; |
| |
| /* Evaluate the indexse.expr only once. */ |
| indexse.expr = save_expr (indexse.expr); |
| |
| /* Lower bound. */ |
| tmp = gfc_conv_array_lbound (se->expr, n); |
| if (sym->attr.temporary) |
| { |
| gfc_init_se (&tmpse, se); |
| gfc_conv_expr_type (&tmpse, ar->as->lower[n], |
| gfc_array_index_type); |
| gfc_add_block_to_block (&se->pre, &tmpse.pre); |
| tmp = tmpse.expr; |
| } |
| |
| cond = fold_build2_loc (input_location, LT_EXPR, logical_type_node, |
| indexse.expr, tmp); |
| msg = xasprintf ("Index '%%ld' of dimension %d of array '%s' " |
| "below lower bound of %%ld", n+1, var_name); |
| gfc_trans_runtime_check (true, false, cond, &se->pre, where, msg, |
| fold_convert (long_integer_type_node, |
| indexse.expr), |
| fold_convert (long_integer_type_node, tmp)); |
| free (msg); |
| |
| /* Upper bound, but not for the last dimension of assumed-size |
| arrays. */ |
| if (n < ar->dimen - 1 || ar->as->type != AS_ASSUMED_SIZE) |
| { |
| tmp = gfc_conv_array_ubound (se->expr, n); |
| if (sym->attr.temporary) |
| { |
| gfc_init_se (&tmpse, se); |
| gfc_conv_expr_type (&tmpse, ar->as->upper[n], |
| gfc_array_index_type); |
| gfc_add_block_to_block (&se->pre, &tmpse.pre); |
| tmp = tmpse.expr; |
| } |
| |
| cond = fold_build2_loc (input_location, GT_EXPR, |
| logical_type_node, indexse.expr, tmp); |
| msg = xasprintf ("Index '%%ld' of dimension %d of array '%s' " |
| "above upper bound of %%ld", n+1, var_name); |
| gfc_trans_runtime_check (true, false, cond, &se->pre, where, msg, |
| fold_convert (long_integer_type_node, |
| indexse.expr), |
| fold_convert (long_integer_type_node, tmp)); |
| free (msg); |
| } |
| } |
| |
| /* Multiply the index by the stride. */ |
| stride = gfc_conv_array_stride (se->expr, n); |
| tmp = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type, |
| indexse.expr, stride); |
| |
| /* And add it to the total. */ |
| add_to_offset (&cst_offset, &offset, tmp); |
| } |
| |
| if (!integer_zerop (cst_offset)) |
| offset = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, offset, cst_offset); |
| |
| /* A pointer array component can be detected from its field decl. Fix |
| the descriptor, mark the resulting variable decl and pass it to |
| build_array_ref. */ |
| if (!expr->ts.deferred && !sym->attr.codimension |
| && is_pointer_array (se->expr)) |
| { |
| if (TREE_CODE (se->expr) == COMPONENT_REF) |
| { |
| decl = gfc_evaluate_now (se->expr, &se->pre); |
| GFC_DECL_PTR_ARRAY_P (decl) = 1; |
| TREE_USED (decl) = 1; |
| } |
| else if (TREE_CODE (se->expr) == INDIRECT_REF) |
| decl = TREE_OPERAND (se->expr, 0); |
| else |
| decl = se->expr; |
| } |
| else if (expr->ts.deferred |
| || (sym->ts.type == BT_CHARACTER |
| && sym->attr.select_type_temporary)) |
| decl = sym->backend_decl; |
| else if (sym->ts.type == BT_CLASS) |
| decl = NULL_TREE; |
| |
| se->expr = build_array_ref (se->expr, offset, decl, se->class_vptr); |
| } |
| |
| |
| /* Add the offset corresponding to array's ARRAY_DIM dimension and loop's |
| LOOP_DIM dimension (if any) to array's offset. */ |
| |
| static void |
| add_array_offset (stmtblock_t *pblock, gfc_loopinfo *loop, gfc_ss *ss, |
| gfc_array_ref *ar, int array_dim, int loop_dim) |
| { |
| gfc_se se; |
| gfc_array_info *info; |
| tree stride, index; |
| |
| info = &ss->info->data.array; |
| |
| gfc_init_se (&se, NULL); |
| se.loop = loop; |
| se.expr = info->descriptor; |
| stride = gfc_conv_array_stride (info->descriptor, array_dim); |
| index = conv_array_index_offset (&se, ss, array_dim, loop_dim, ar, stride); |
| gfc_add_block_to_block (pblock, &se.pre); |
| |
| info->offset = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| info->offset, index); |
| info->offset = gfc_evaluate_now (info->offset, pblock); |
| } |
| |
| |
| /* Generate the code to be executed immediately before entering a |
| scalarization loop. */ |
| |
| static void |
| gfc_trans_preloop_setup (gfc_loopinfo * loop, int dim, int flag, |
| stmtblock_t * pblock) |
| { |
| tree stride; |
| gfc_ss_info *ss_info; |
| gfc_array_info *info; |
| gfc_ss_type ss_type; |
| gfc_ss *ss, *pss; |
| gfc_loopinfo *ploop; |
| gfc_array_ref *ar; |
| int i; |
| |
| /* This code will be executed before entering the scalarization loop |
| for this dimension. */ |
| for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain) |
| { |
| ss_info = ss->info; |
| |
| if ((ss_info->useflags & flag) == 0) |
| continue; |
| |
| ss_type = ss_info->type; |
| if (ss_type != GFC_SS_SECTION |
| && ss_type != GFC_SS_FUNCTION |
| && ss_type != GFC_SS_CONSTRUCTOR |
| && ss_type != GFC_SS_COMPONENT) |
| continue; |
| |
| info = &ss_info->data.array; |
| |
| gcc_assert (dim < ss->dimen); |
| gcc_assert (ss->dimen == loop->dimen); |
| |
| if (info->ref) |
| ar = &info->ref->u.ar; |
| else |
| ar = NULL; |
| |
| if (dim == loop->dimen - 1 && loop->parent != NULL) |
| { |
| /* If we are in the outermost dimension of this loop, the previous |
| dimension shall be in the parent loop. */ |
| gcc_assert (ss->parent != NULL); |
| |
| pss = ss->parent; |
| ploop = loop->parent; |
| |
| /* ss and ss->parent are about the same array. */ |
| gcc_assert (ss_info == pss->info); |
| } |
| else |
| { |
| ploop = loop; |
| pss = ss; |
| } |
| |
| if (dim == loop->dimen - 1) |
| i = 0; |
| else |
| i = dim + 1; |
| |
| /* For the time being, there is no loop reordering. */ |
| gcc_assert (i == ploop->order[i]); |
| i = ploop->order[i]; |
| |
| if (dim == loop->dimen - 1 && loop->parent == NULL) |
| { |
| stride = gfc_conv_array_stride (info->descriptor, |
| innermost_ss (ss)->dim[i]); |
| |
| /* Calculate the stride of the innermost loop. Hopefully this will |
| allow the backend optimizers to do their stuff more effectively. |
| */ |
| info->stride0 = gfc_evaluate_now (stride, pblock); |
| |
| /* For the outermost loop calculate the offset due to any |
| elemental dimensions. It will have been initialized with the |
| base offset of the array. */ |
| if (info->ref) |
| { |
| for (i = 0; i < ar->dimen; i++) |
| { |
| if (ar->dimen_type[i] != DIMEN_ELEMENT) |
| continue; |
| |
| add_array_offset (pblock, loop, ss, ar, i, /* unused */ -1); |
| } |
| } |
| } |
| else |
| /* Add the offset for the previous loop dimension. */ |
| add_array_offset (pblock, ploop, ss, ar, pss->dim[i], i); |
| |
| /* Remember this offset for the second loop. */ |
| if (dim == loop->temp_dim - 1 && loop->parent == NULL) |
| info->saved_offset = info->offset; |
| } |
| } |
| |
| |
| /* Start a scalarized expression. Creates a scope and declares loop |
| variables. */ |
| |
| void |
| gfc_start_scalarized_body (gfc_loopinfo * loop, stmtblock_t * pbody) |
| { |
| int dim; |
| int n; |
| int flags; |
| |
| gcc_assert (!loop->array_parameter); |
| |
| for (dim = loop->dimen - 1; dim >= 0; dim--) |
| { |
| n = loop->order[dim]; |
| |
| gfc_start_block (&loop->code[n]); |
| |
| /* Create the loop variable. */ |
| loop->loopvar[n] = gfc_create_var (gfc_array_index_type, "S"); |
| |
| if (dim < loop->temp_dim) |
| flags = 3; |
| else |
| flags = 1; |
| /* Calculate values that will be constant within this loop. */ |
| gfc_trans_preloop_setup (loop, dim, flags, &loop->code[n]); |
| } |
| gfc_start_block (pbody); |
| } |
| |
| |
| /* Generates the actual loop code for a scalarization loop. */ |
| |
| void |
| gfc_trans_scalarized_loop_end (gfc_loopinfo * loop, int n, |
| stmtblock_t * pbody) |
| { |
| stmtblock_t block; |
| tree cond; |
| tree tmp; |
| tree loopbody; |
| tree exit_label; |
| tree stmt; |
| tree init; |
| tree incr; |
| |
| if ((ompws_flags & (OMPWS_WORKSHARE_FLAG | OMPWS_SCALARIZER_WS |
| | OMPWS_SCALARIZER_BODY)) |
| == (OMPWS_WORKSHARE_FLAG | OMPWS_SCALARIZER_WS) |
| && n == loop->dimen - 1) |
| { |
| /* We create an OMP_FOR construct for the outermost scalarized loop. */ |
| init = make_tree_vec (1); |
| cond = make_tree_vec (1); |
| incr = make_tree_vec (1); |
| |
| /* Cycle statement is implemented with a goto. Exit statement must not |
| be present for this loop. */ |
| exit_label = gfc_build_label_decl (NULL_TREE); |
| TREE_USED (exit_label) = 1; |
| |
| /* Label for cycle statements (if needed). */ |
| tmp = build1_v (LABEL_EXPR, exit_label); |
| gfc_add_expr_to_block (pbody, tmp); |
| |
| stmt = make_node (OMP_FOR); |
| |
| TREE_TYPE (stmt) = void_type_node; |
| OMP_FOR_BODY (stmt) = loopbody = gfc_finish_block (pbody); |
| |
| OMP_FOR_CLAUSES (stmt) = build_omp_clause (input_location, |
| OMP_CLAUSE_SCHEDULE); |
| OMP_CLAUSE_SCHEDULE_KIND (OMP_FOR_CLAUSES (stmt)) |
| = OMP_CLAUSE_SCHEDULE_STATIC; |
| if (ompws_flags & OMPWS_NOWAIT) |
| OMP_CLAUSE_CHAIN (OMP_FOR_CLAUSES (stmt)) |
| = build_omp_clause (input_location, OMP_CLAUSE_NOWAIT); |
| |
| /* Initialize the loopvar. */ |
| TREE_VEC_ELT (init, 0) = build2_v (MODIFY_EXPR, loop->loopvar[n], |
| loop->from[n]); |
| OMP_FOR_INIT (stmt) = init; |
| /* The exit condition. */ |
| TREE_VEC_ELT (cond, 0) = build2_loc (input_location, LE_EXPR, |
| logical_type_node, |
| loop->loopvar[n], loop->to[n]); |
| SET_EXPR_LOCATION (TREE_VEC_ELT (cond, 0), input_location); |
| OMP_FOR_COND (stmt) = cond; |
| /* Increment the loopvar. */ |
| tmp = build2_loc (input_location, PLUS_EXPR, gfc_array_index_type, |
| loop->loopvar[n], gfc_index_one_node); |
| TREE_VEC_ELT (incr, 0) = fold_build2_loc (input_location, MODIFY_EXPR, |
| void_type_node, loop->loopvar[n], tmp); |
| OMP_FOR_INCR (stmt) = incr; |
| |
| ompws_flags &= ~OMPWS_CURR_SINGLEUNIT; |
| gfc_add_expr_to_block (&loop->code[n], stmt); |
| } |
| else |
| { |
| bool reverse_loop = (loop->reverse[n] == GFC_REVERSE_SET) |
| && (loop->temp_ss == NULL); |
| |
| loopbody = gfc_finish_block (pbody); |
| |
| if (reverse_loop) |
| std::swap (loop->from[n], loop->to[n]); |
| |
| /* Initialize the loopvar. */ |
| if (loop->loopvar[n] != loop->from[n]) |
| gfc_add_modify (&loop->code[n], loop->loopvar[n], loop->from[n]); |
| |
| exit_label = gfc_build_label_decl (NULL_TREE); |
| |
| /* Generate the loop body. */ |
| gfc_init_block (&block); |
| |
| /* The exit condition. */ |
| cond = fold_build2_loc (input_location, reverse_loop ? LT_EXPR : GT_EXPR, |
| logical_type_node, loop->loopvar[n], loop->to[n]); |
| tmp = build1_v (GOTO_EXPR, exit_label); |
| TREE_USED (exit_label) = 1; |
| tmp = build3_v (COND_EXPR, cond, tmp, build_empty_stmt (input_location)); |
| gfc_add_expr_to_block (&block, tmp); |
| |
| /* The main body. */ |
| gfc_add_expr_to_block (&block, loopbody); |
| |
| /* Increment the loopvar. */ |
| tmp = fold_build2_loc (input_location, |
| reverse_loop ? MINUS_EXPR : PLUS_EXPR, |
| gfc_array_index_type, loop->loopvar[n], |
| gfc_index_one_node); |
| |
| gfc_add_modify (&block, loop->loopvar[n], tmp); |
| |
| /* Build the loop. */ |
| tmp = gfc_finish_block (&block); |
| tmp = build1_v (LOOP_EXPR, tmp); |
| gfc_add_expr_to_block (&loop->code[n], tmp); |
| |
| /* Add the exit label. */ |
| tmp = build1_v (LABEL_EXPR, exit_label); |
| gfc_add_expr_to_block (&loop->code[n], tmp); |
| } |
| |
| } |
| |
| |
| /* Finishes and generates the loops for a scalarized expression. */ |
| |
| void |
| gfc_trans_scalarizing_loops (gfc_loopinfo * loop, stmtblock_t * body) |
| { |
| int dim; |
| int n; |
| gfc_ss *ss; |
| stmtblock_t *pblock; |
| tree tmp; |
| |
| pblock = body; |
| /* Generate the loops. */ |
| for (dim = 0; dim < loop->dimen; dim++) |
| { |
| n = loop->order[dim]; |
| gfc_trans_scalarized_loop_end (loop, n, pblock); |
| loop->loopvar[n] = NULL_TREE; |
| pblock = &loop->code[n]; |
| } |
| |
| tmp = gfc_finish_block (pblock); |
| gfc_add_expr_to_block (&loop->pre, tmp); |
| |
| /* Clear all the used flags. */ |
| for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain) |
| if (ss->parent == NULL) |
| ss->info->useflags = 0; |
| } |
| |
| |
| /* Finish the main body of a scalarized expression, and start the secondary |
| copying body. */ |
| |
| void |
| gfc_trans_scalarized_loop_boundary (gfc_loopinfo * loop, stmtblock_t * body) |
| { |
| int dim; |
| int n; |
| stmtblock_t *pblock; |
| gfc_ss *ss; |
| |
| pblock = body; |
| /* We finish as many loops as are used by the temporary. */ |
| for (dim = 0; dim < loop->temp_dim - 1; dim++) |
| { |
| n = loop->order[dim]; |
| gfc_trans_scalarized_loop_end (loop, n, pblock); |
| loop->loopvar[n] = NULL_TREE; |
| pblock = &loop->code[n]; |
| } |
| |
| /* We don't want to finish the outermost loop entirely. */ |
| n = loop->order[loop->temp_dim - 1]; |
| gfc_trans_scalarized_loop_end (loop, n, pblock); |
| |
| /* Restore the initial offsets. */ |
| for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain) |
| { |
| gfc_ss_type ss_type; |
| gfc_ss_info *ss_info; |
| |
| ss_info = ss->info; |
| |
| if ((ss_info->useflags & 2) == 0) |
| continue; |
| |
| ss_type = ss_info->type; |
| if (ss_type != GFC_SS_SECTION |
| && ss_type != GFC_SS_FUNCTION |
| && ss_type != GFC_SS_CONSTRUCTOR |
| && ss_type != GFC_SS_COMPONENT) |
| continue; |
| |
| ss_info->data.array.offset = ss_info->data.array.saved_offset; |
| } |
| |
| /* Restart all the inner loops we just finished. */ |
| for (dim = loop->temp_dim - 2; dim >= 0; dim--) |
| { |
| n = loop->order[dim]; |
| |
| gfc_start_block (&loop->code[n]); |
| |
| loop->loopvar[n] = gfc_create_var (gfc_array_index_type, "Q"); |
| |
| gfc_trans_preloop_setup (loop, dim, 2, &loop->code[n]); |
| } |
| |
| /* Start a block for the secondary copying code. */ |
| gfc_start_block (body); |
| } |
| |
| |
| /* Precalculate (either lower or upper) bound of an array section. |
| BLOCK: Block in which the (pre)calculation code will go. |
| BOUNDS[DIM]: Where the bound value will be stored once evaluated. |
| VALUES[DIM]: Specified bound (NULL <=> unspecified). |
| DESC: Array descriptor from which the bound will be picked if unspecified |
| (either lower or upper bound according to LBOUND). */ |
| |
| static void |
| evaluate_bound (stmtblock_t *block, tree *bounds, gfc_expr ** values, |
| tree desc, int dim, bool lbound, bool deferred) |
| { |
| gfc_se se; |
| gfc_expr * input_val = values[dim]; |
| tree *output = &bounds[dim]; |
| |
| |
| if (input_val) |
| { |
| /* Specified section bound. */ |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_type (&se, input_val, gfc_array_index_type); |
| gfc_add_block_to_block (block, &se.pre); |
| *output = se.expr; |
| } |
| else if (deferred && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (desc))) |
| { |
| /* The gfc_conv_array_lbound () routine returns a constant zero for |
| deferred length arrays, which in the scalarizer wreaks havoc, when |
| copying to a (newly allocated) one-based array. |
| Keep returning the actual result in sync for both bounds. */ |
| *output = lbound ? gfc_conv_descriptor_lbound_get (desc, |
| gfc_rank_cst[dim]): |
| gfc_conv_descriptor_ubound_get (desc, |
| gfc_rank_cst[dim]); |
| } |
| else |
| { |
| /* No specific bound specified so use the bound of the array. */ |
| *output = lbound ? gfc_conv_array_lbound (desc, dim) : |
| gfc_conv_array_ubound (desc, dim); |
| } |
| *output = gfc_evaluate_now (*output, block); |
| } |
| |
| |
| /* Calculate the lower bound of an array section. */ |
| |
| static void |
| gfc_conv_section_startstride (stmtblock_t * block, gfc_ss * ss, int dim) |
| { |
| gfc_expr *stride = NULL; |
| tree desc; |
| gfc_se se; |
| gfc_array_info *info; |
| gfc_array_ref *ar; |
| |
| gcc_assert (ss->info->type == GFC_SS_SECTION); |
| |
| info = &ss->info->data.array; |
| ar = &info->ref->u.ar; |
| |
| if (ar->dimen_type[dim] == DIMEN_VECTOR) |
| { |
| /* We use a zero-based index to access the vector. */ |
| info->start[dim] = gfc_index_zero_node; |
| info->end[dim] = NULL; |
| info->stride[dim] = gfc_index_one_node; |
| return; |
| } |
| |
| gcc_assert (ar->dimen_type[dim] == DIMEN_RANGE |
| || ar->dimen_type[dim] == DIMEN_THIS_IMAGE); |
| desc = info->descriptor; |
| stride = ar->stride[dim]; |
| |
| |
| /* Calculate the start of the range. For vector subscripts this will |
| be the range of the vector. */ |
| evaluate_bound (block, info->start, ar->start, desc, dim, true, |
| ar->as->type == AS_DEFERRED); |
| |
| /* Similarly calculate the end. Although this is not used in the |
| scalarizer, it is needed when checking bounds and where the end |
| is an expression with side-effects. */ |
| evaluate_bound (block, info->end, ar->end, desc, dim, false, |
| ar->as->type == AS_DEFERRED); |
| |
| |
| /* Calculate the stride. */ |
| if (stride == NULL) |
| info->stride[dim] = gfc_index_one_node; |
| else |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_type (&se, stride, gfc_array_index_type); |
| gfc_add_block_to_block (block, &se.pre); |
| info->stride[dim] = gfc_evaluate_now (se.expr, block); |
| } |
| } |
| |
| |
| /* Calculates the range start and stride for a SS chain. Also gets the |
| descriptor and data pointer. The range of vector subscripts is the size |
| of the vector. Array bounds are also checked. */ |
| |
| void |
| gfc_conv_ss_startstride (gfc_loopinfo * loop) |
| { |
| int n; |
| tree tmp; |
| gfc_ss *ss; |
| tree desc; |
| |
| gfc_loopinfo * const outer_loop = outermost_loop (loop); |
| |
| loop->dimen = 0; |
| /* Determine the rank of the loop. */ |
| for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain) |
| { |
| switch (ss->info->type) |
| { |
| case GFC_SS_SECTION: |
| case GFC_SS_CONSTRUCTOR: |
| case GFC_SS_FUNCTION: |
| case GFC_SS_COMPONENT: |
| loop->dimen = ss->dimen; |
| goto done; |
| |
| /* As usual, lbound and ubound are exceptions!. */ |
| case GFC_SS_INTRINSIC: |
| switch (ss->info->expr->value.function.isym->id) |
| { |
| case GFC_ISYM_LBOUND: |
| case GFC_ISYM_UBOUND: |
| case GFC_ISYM_LCOBOUND: |
| case GFC_ISYM_UCOBOUND: |
| case GFC_ISYM_THIS_IMAGE: |
| loop->dimen = ss->dimen; |
| goto done; |
| |
| default: |
| break; |
| } |
| |
| default: |
| break; |
| } |
| } |
| |
| /* We should have determined the rank of the expression by now. If |
| not, that's bad news. */ |
| gcc_unreachable (); |
| |
| done: |
| /* Loop over all the SS in the chain. */ |
| for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain) |
| { |
| gfc_ss_info *ss_info; |
| gfc_array_info *info; |
| gfc_expr *expr; |
| |
| ss_info = ss->info; |
| expr = ss_info->expr; |
| info = &ss_info->data.array; |
| |
| if (expr && expr->shape && !info->shape) |
| info->shape = expr->shape; |
| |
| switch (ss_info->type) |
| { |
| case GFC_SS_SECTION: |
| /* Get the descriptor for the array. If it is a cross loops array, |
| we got the descriptor already in the outermost loop. */ |
| if (ss->parent == NULL) |
| gfc_conv_ss_descriptor (&outer_loop->pre, ss, |
| !loop->array_parameter); |
| |
| for (n = 0; n < ss->dimen; n++) |
| gfc_conv_section_startstride (&outer_loop->pre, ss, ss->dim[n]); |
| break; |
| |
| case GFC_SS_INTRINSIC: |
| switch (expr->value.function.isym->id) |
| { |
| /* Fall through to supply start and stride. */ |
| case GFC_ISYM_LBOUND: |
| case GFC_ISYM_UBOUND: |
| { |
| gfc_expr *arg; |
| |
| /* This is the variant without DIM=... */ |
| gcc_assert (expr->value.function.actual->next->expr == NULL); |
| |
| arg = expr->value.function.actual->expr; |
| if (arg->rank == -1) |
| { |
| gfc_se se; |
| tree rank, tmp; |
| |
| /* The rank (hence the return value's shape) is unknown, |
| we have to retrieve it. */ |
| gfc_init_se (&se, NULL); |
| se.descriptor_only = 1; |
| gfc_conv_expr (&se, arg); |
| /* This is a bare variable, so there is no preliminary |
| or cleanup code. */ |
| gcc_assert (se.pre.head == NULL_TREE |
| && se.post.head == NULL_TREE); |
| rank = gfc_conv_descriptor_rank (se.expr); |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| fold_convert (gfc_array_index_type, |
| rank), |
| gfc_index_one_node); |
| info->end[0] = gfc_evaluate_now (tmp, &outer_loop->pre); |
| info->start[0] = gfc_index_zero_node; |
| info->stride[0] = gfc_index_one_node; |
| continue; |
| } |
| /* Otherwise fall through GFC_SS_FUNCTION. */ |
| gcc_fallthrough (); |
| } |
| case GFC_ISYM_LCOBOUND: |
| case GFC_ISYM_UCOBOUND: |
| case GFC_ISYM_THIS_IMAGE: |
| break; |
| |
| default: |
| continue; |
| } |
| |
| /* FALLTHRU */ |
| case GFC_SS_CONSTRUCTOR: |
| case GFC_SS_FUNCTION: |
| for (n = 0; n < ss->dimen; n++) |
| { |
| int dim = ss->dim[n]; |
| |
| info->start[dim] = gfc_index_zero_node; |
| info->end[dim] = gfc_index_zero_node; |
| info->stride[dim] = gfc_index_one_node; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| /* The rest is just runtime bounds checking. */ |
| if (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS) |
| { |
| stmtblock_t block; |
| tree lbound, ubound; |
| tree end; |
| tree size[GFC_MAX_DIMENSIONS]; |
| tree stride_pos, stride_neg, non_zerosized, tmp2, tmp3; |
| gfc_array_info *info; |
| char *msg; |
| int dim; |
| |
| gfc_start_block (&block); |
| |
| for (n = 0; n < loop->dimen; n++) |
| size[n] = NULL_TREE; |
| |
| for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain) |
| { |
| stmtblock_t inner; |
| gfc_ss_info *ss_info; |
| gfc_expr *expr; |
| locus *expr_loc; |
| const char *expr_name; |
| |
| ss_info = ss->info; |
| if (ss_info->type != GFC_SS_SECTION) |
| continue; |
| |
| /* Catch allocatable lhs in f2003. */ |
| if (flag_realloc_lhs && ss->no_bounds_check) |
| continue; |
| |
| expr = ss_info->expr; |
| expr_loc = &expr->where; |
| expr_name = expr->symtree->name; |
| |
| gfc_start_block (&inner); |
| |
| /* TODO: range checking for mapped dimensions. */ |
| info = &ss_info->data.array; |
| |
| /* This code only checks ranges. Elemental and vector |
| dimensions are checked later. */ |
| for (n = 0; n < loop->dimen; n++) |
| { |
| bool check_upper; |
| |
| dim = ss->dim[n]; |
| if (info->ref->u.ar.dimen_type[dim] != DIMEN_RANGE) |
| continue; |
| |
| if (dim == info->ref->u.ar.dimen - 1 |
| && info->ref->u.ar.as->type == AS_ASSUMED_SIZE) |
| check_upper = false; |
| else |
| check_upper = true; |
| |
| /* Zero stride is not allowed. */ |
| tmp = fold_build2_loc (input_location, EQ_EXPR, logical_type_node, |
| info->stride[dim], gfc_index_zero_node); |
| msg = xasprintf ("Zero stride is not allowed, for dimension %d " |
| "of array '%s'", dim + 1, expr_name); |
| gfc_trans_runtime_check (true, false, tmp, &inner, |
| expr_loc, msg); |
| free (msg); |
| |
| desc = info->descriptor; |
| |
| /* This is the run-time equivalent of resolve.c's |
| check_dimension(). The logical is more readable there |
| than it is here, with all the trees. */ |
| lbound = gfc_conv_array_lbound (desc, dim); |
| end = info->end[dim]; |
| if (check_upper) |
| ubound = gfc_conv_array_ubound (desc, dim); |
| else |
| ubound = NULL; |
| |
| /* non_zerosized is true when the selected range is not |
| empty. */ |
| stride_pos = fold_build2_loc (input_location, GT_EXPR, |
| logical_type_node, info->stride[dim], |
| gfc_index_zero_node); |
| tmp = fold_build2_loc (input_location, LE_EXPR, logical_type_node, |
| info->start[dim], end); |
| stride_pos = fold_build2_loc (input_location, TRUTH_AND_EXPR, |
| logical_type_node, stride_pos, tmp); |
| |
| stride_neg = fold_build2_loc (input_location, LT_EXPR, |
| logical_type_node, |
| info->stride[dim], gfc_index_zero_node); |
| tmp = fold_build2_loc (input_location, GE_EXPR, logical_type_node, |
| info->start[dim], end); |
| stride_neg = fold_build2_loc (input_location, TRUTH_AND_EXPR, |
| logical_type_node, |
| stride_neg, tmp); |
| non_zerosized = fold_build2_loc (input_location, TRUTH_OR_EXPR, |
| logical_type_node, |
| stride_pos, stride_neg); |
| |
| /* Check the start of the range against the lower and upper |
| bounds of the array, if the range is not empty. |
| If upper bound is present, include both bounds in the |
| error message. */ |
| if (check_upper) |
| { |
| tmp = fold_build2_loc (input_location, LT_EXPR, |
| logical_type_node, |
| info->start[dim], lbound); |
| tmp = fold_build2_loc (input_location, TRUTH_AND_EXPR, |
| logical_type_node, |
| non_zerosized, tmp); |
| tmp2 = fold_build2_loc (input_location, GT_EXPR, |
| logical_type_node, |
| info->start[dim], ubound); |
| tmp2 = fold_build2_loc (input_location, TRUTH_AND_EXPR, |
| logical_type_node, |
| non_zerosized, tmp2); |
| msg = xasprintf ("Index '%%ld' of dimension %d of array '%s' " |
| "outside of expected range (%%ld:%%ld)", |
| dim + 1, expr_name); |
| gfc_trans_runtime_check (true, false, tmp, &inner, |
| expr_loc, msg, |
| fold_convert (long_integer_type_node, info->start[dim]), |
| fold_convert (long_integer_type_node, lbound), |
| fold_convert (long_integer_type_node, ubound)); |
| gfc_trans_runtime_check (true, false, tmp2, &inner, |
| expr_loc, msg, |
| fold_convert (long_integer_type_node, info->start[dim]), |
| fold_convert (long_integer_type_node, lbound), |
| fold_convert (long_integer_type_node, ubound)); |
| free (msg); |
| } |
| else |
| { |
| tmp = fold_build2_loc (input_location, LT_EXPR, |
| logical_type_node, |
| info->start[dim], lbound); |
| tmp = fold_build2_loc (input_location, TRUTH_AND_EXPR, |
| logical_type_node, non_zerosized, tmp); |
| msg = xasprintf ("Index '%%ld' of dimension %d of array '%s' " |
| "below lower bound of %%ld", |
| dim + 1, expr_name); |
| gfc_trans_runtime_check (true, false, tmp, &inner, |
| expr_loc, msg, |
| fold_convert (long_integer_type_node, info->start[dim]), |
| fold_convert (long_integer_type_node, lbound)); |
| free (msg); |
| } |
| |
| /* Compute the last element of the range, which is not |
| necessarily "end" (think 0:5:3, which doesn't contain 5) |
| and check it against both lower and upper bounds. */ |
| |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, end, |
| info->start[dim]); |
| tmp = fold_build2_loc (input_location, TRUNC_MOD_EXPR, |
| gfc_array_index_type, tmp, |
| info->stride[dim]); |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, end, tmp); |
| tmp2 = fold_build2_loc (input_location, LT_EXPR, |
| logical_type_node, tmp, lbound); |
| tmp2 = fold_build2_loc (input_location, TRUTH_AND_EXPR, |
| logical_type_node, non_zerosized, tmp2); |
| if (check_upper) |
| { |
| tmp3 = fold_build2_loc (input_location, GT_EXPR, |
| logical_type_node, tmp, ubound); |
| tmp3 = fold_build2_loc (input_location, TRUTH_AND_EXPR, |
| logical_type_node, non_zerosized, tmp3); |
| msg = xasprintf ("Index '%%ld' of dimension %d of array '%s' " |
| "outside of expected range (%%ld:%%ld)", |
| dim + 1, expr_name); |
| gfc_trans_runtime_check (true, false, tmp2, &inner, |
| expr_loc, msg, |
| fold_convert (long_integer_type_node, tmp), |
| fold_convert (long_integer_type_node, ubound), |
| fold_convert (long_integer_type_node, lbound)); |
| gfc_trans_runtime_check (true, false, tmp3, &inner, |
| expr_loc, msg, |
| fold_convert (long_integer_type_node, tmp), |
| fold_convert (long_integer_type_node, ubound), |
| fold_convert (long_integer_type_node, lbound)); |
| free (msg); |
| } |
| else |
| { |
| msg = xasprintf ("Index '%%ld' of dimension %d of array '%s' " |
| "below lower bound of %%ld", |
| dim + 1, expr_name); |
| gfc_trans_runtime_check (true, false, tmp2, &inner, |
| expr_loc, msg, |
| fold_convert (long_integer_type_node, tmp), |
| fold_convert (long_integer_type_node, lbound)); |
| free (msg); |
| } |
| |
| /* Check the section sizes match. */ |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, end, |
| info->start[dim]); |
| tmp = fold_build2_loc (input_location, FLOOR_DIV_EXPR, |
| gfc_array_index_type, tmp, |
| info->stride[dim]); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| gfc_index_one_node, tmp); |
| tmp = fold_build2_loc (input_location, MAX_EXPR, |
| gfc_array_index_type, tmp, |
| build_int_cst (gfc_array_index_type, 0)); |
| /* We remember the size of the first section, and check all the |
| others against this. */ |
| if (size[n]) |
| { |
| tmp3 = fold_build2_loc (input_location, NE_EXPR, |
| logical_type_node, tmp, size[n]); |
| msg = xasprintf ("Array bound mismatch for dimension %d " |
| "of array '%s' (%%ld/%%ld)", |
| dim + 1, expr_name); |
| |
| gfc_trans_runtime_check (true, false, tmp3, &inner, |
| expr_loc, msg, |
| fold_convert (long_integer_type_node, tmp), |
| fold_convert (long_integer_type_node, size[n])); |
| |
| free (msg); |
| } |
| else |
| size[n] = gfc_evaluate_now (tmp, &inner); |
| } |
| |
| tmp = gfc_finish_block (&inner); |
| |
| /* For optional arguments, only check bounds if the argument is |
| present. */ |
| if (expr->symtree->n.sym->attr.optional |
| || expr->symtree->n.sym->attr.not_always_present) |
| tmp = build3_v (COND_EXPR, |
| gfc_conv_expr_present (expr->symtree->n.sym), |
| tmp, build_empty_stmt (input_location)); |
| |
| gfc_add_expr_to_block (&block, tmp); |
| |
| } |
| |
| tmp = gfc_finish_block (&block); |
| gfc_add_expr_to_block (&outer_loop->pre, tmp); |
| } |
| |
| for (loop = loop->nested; loop; loop = loop->next) |
| gfc_conv_ss_startstride (loop); |
| } |
| |
| /* Return true if both symbols could refer to the same data object. Does |
| not take account of aliasing due to equivalence statements. */ |
| |
| static int |
| symbols_could_alias (gfc_symbol *lsym, gfc_symbol *rsym, bool lsym_pointer, |
| bool lsym_target, bool rsym_pointer, bool rsym_target) |
| { |
| /* Aliasing isn't possible if the symbols have different base types. */ |
| if (gfc_compare_types (&lsym->ts, &rsym->ts) == 0) |
| return 0; |
| |
| /* Pointers can point to other pointers and target objects. */ |
| |
| if ((lsym_pointer && (rsym_pointer || rsym_target)) |
| || (rsym_pointer && (lsym_pointer || lsym_target))) |
| return 1; |
| |
| /* Special case: Argument association, cf. F90 12.4.1.6, F2003 12.4.1.7 |
| and F2008 12.5.2.13 items 3b and 4b. The pointer case (a) is already |
| checked above. */ |
| if (lsym_target && rsym_target |
| && ((lsym->attr.dummy && !lsym->attr.contiguous |
| && (!lsym->attr.dimension || lsym->as->type == AS_ASSUMED_SHAPE)) |
| || (rsym->attr.dummy && !rsym->attr.contiguous |
| && (!rsym->attr.dimension |
| || rsym->as->type == AS_ASSUMED_SHAPE)))) |
| return 1; |
| |
| return 0; |
| } |
| |
| |
| /* Return true if the two SS could be aliased, i.e. both point to the same data |
| object. */ |
| /* TODO: resolve aliases based on frontend expressions. */ |
| |
| static int |
| gfc_could_be_alias (gfc_ss * lss, gfc_ss * rss) |
| { |
| gfc_ref *lref; |
| gfc_ref *rref; |
| gfc_expr *lexpr, *rexpr; |
| gfc_symbol *lsym; |
| gfc_symbol *rsym; |
| bool lsym_pointer, lsym_target, rsym_pointer, rsym_target; |
| |
| lexpr = lss->info->expr; |
| rexpr = rss->info->expr; |
| |
| lsym = lexpr->symtree->n.sym; |
| rsym = rexpr->symtree->n.sym; |
| |
| lsym_pointer = lsym->attr.pointer; |
| lsym_target = lsym->attr.target; |
| rsym_pointer = rsym->attr.pointer; |
| rsym_target = rsym->attr.target; |
| |
| if (symbols_could_alias (lsym, rsym, lsym_pointer, lsym_target, |
| rsym_pointer, rsym_target)) |
| return 1; |
| |
| if (rsym->ts.type != BT_DERIVED && rsym->ts.type != BT_CLASS |
| && lsym->ts.type != BT_DERIVED && lsym->ts.type != BT_CLASS) |
| return 0; |
| |
| /* For derived types we must check all the component types. We can ignore |
| array references as these will have the same base type as the previous |
| component ref. */ |
| for (lref = lexpr->ref; lref != lss->info->data.array.ref; lref = lref->next) |
| { |
| if (lref->type != REF_COMPONENT) |
| continue; |
| |
| lsym_pointer = lsym_pointer || lref->u.c.sym->attr.pointer; |
| lsym_target = lsym_target || lref->u.c.sym->attr.target; |
| |
| if (symbols_could_alias (lref->u.c.sym, rsym, lsym_pointer, lsym_target, |
| rsym_pointer, rsym_target)) |
| return 1; |
| |
| if ((lsym_pointer && (rsym_pointer || rsym_target)) |
| || (rsym_pointer && (lsym_pointer || lsym_target))) |
| { |
| if (gfc_compare_types (&lref->u.c.component->ts, |
| &rsym->ts)) |
| return 1; |
| } |
| |
| for (rref = rexpr->ref; rref != rss->info->data.array.ref; |
| rref = rref->next) |
| { |
| if (rref->type != REF_COMPONENT) |
| continue; |
| |
| rsym_pointer = rsym_pointer || rref->u.c.sym->attr.pointer; |
| rsym_target = lsym_target || rref->u.c.sym->attr.target; |
| |
| if (symbols_could_alias (lref->u.c.sym, rref->u.c.sym, |
| lsym_pointer, lsym_target, |
| rsym_pointer, rsym_target)) |
| return 1; |
| |
| if ((lsym_pointer && (rsym_pointer || rsym_target)) |
| || (rsym_pointer && (lsym_pointer || lsym_target))) |
| { |
| if (gfc_compare_types (&lref->u.c.component->ts, |
| &rref->u.c.sym->ts)) |
| return 1; |
| if (gfc_compare_types (&lref->u.c.sym->ts, |
| &rref->u.c.component->ts)) |
| return 1; |
| if (gfc_compare_types (&lref->u.c.component->ts, |
| &rref->u.c.component->ts)) |
| return 1; |
| } |
| } |
| } |
| |
| lsym_pointer = lsym->attr.pointer; |
| lsym_target = lsym->attr.target; |
| lsym_pointer = lsym->attr.pointer; |
| lsym_target = lsym->attr.target; |
| |
| for (rref = rexpr->ref; rref != rss->info->data.array.ref; rref = rref->next) |
| { |
| if (rref->type != REF_COMPONENT) |
| break; |
| |
| rsym_pointer = rsym_pointer || rref->u.c.sym->attr.pointer; |
| rsym_target = lsym_target || rref->u.c.sym->attr.target; |
| |
| if (symbols_could_alias (rref->u.c.sym, lsym, |
| lsym_pointer, lsym_target, |
| rsym_pointer, rsym_target)) |
| return 1; |
| |
| if ((lsym_pointer && (rsym_pointer || rsym_target)) |
| || (rsym_pointer && (lsym_pointer || lsym_target))) |
| { |
| if (gfc_compare_types (&lsym->ts, &rref->u.c.component->ts)) |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| |
| /* Resolve array data dependencies. Creates a temporary if required. */ |
| /* TODO: Calc dependencies with gfc_expr rather than gfc_ss, and move to |
| dependency.c. */ |
| |
| void |
| gfc_conv_resolve_dependencies (gfc_loopinfo * loop, gfc_ss * dest, |
| gfc_ss * rss) |
| { |
| gfc_ss *ss; |
| gfc_ref *lref; |
| gfc_ref *rref; |
| gfc_ss_info *ss_info; |
| gfc_expr *dest_expr; |
| gfc_expr *ss_expr; |
| int nDepend = 0; |
| int i, j; |
| |
| loop->temp_ss = NULL; |
| dest_expr = dest->info->expr; |
| |
| for (ss = rss; ss != gfc_ss_terminator; ss = ss->next) |
| { |
| ss_info = ss->info; |
| ss_expr = ss_info->expr; |
| |
| if (ss_info->array_outer_dependency) |
| { |
| nDepend = 1; |
| break; |
| } |
| |
| if (ss_info->type != GFC_SS_SECTION) |
| { |
| if (flag_realloc_lhs |
| && dest_expr != ss_expr |
| && gfc_is_reallocatable_lhs (dest_expr) |
| && ss_expr->rank) |
| nDepend = gfc_check_dependency (dest_expr, ss_expr, true); |
| |
| /* Check for cases like c(:)(1:2) = c(2)(2:3) */ |
| if (!nDepend && dest_expr->rank > 0 |
| && dest_expr->ts.type == BT_CHARACTER |
| && ss_expr->expr_type == EXPR_VARIABLE) |
| |
| nDepend = gfc_check_dependency (dest_expr, ss_expr, false); |
| |
| if (ss_info->type == GFC_SS_REFERENCE |
| && gfc_check_dependency (dest_expr, ss_expr, false)) |
| ss_info->data.scalar.needs_temporary = 1; |
| |
| if (nDepend) |
| break; |
| else |
| continue; |
| } |
| |
| if (dest_expr->symtree->n.sym != ss_expr->symtree->n.sym) |
| { |
| if (gfc_could_be_alias (dest, ss) |
| || gfc_are_equivalenced_arrays (dest_expr, ss_expr)) |
| { |
| nDepend = 1; |
| break; |
| } |
| } |
| else |
| { |
| lref = dest_expr->ref; |
| rref = ss_expr->ref; |
| |
| nDepend = gfc_dep_resolver (lref, rref, &loop->reverse[0]); |
| |
| if (nDepend == 1) |
| break; |
| |
| for (i = 0; i < dest->dimen; i++) |
| for (j = 0; j < ss->dimen; j++) |
| if (i != j |
| && dest->dim[i] == ss->dim[j]) |
| { |
| /* If we don't access array elements in the same order, |
| there is a dependency. */ |
| nDepend = 1; |
| goto temporary; |
| } |
| #if 0 |
| /* TODO : loop shifting. */ |
| if (nDepend == 1) |
| { |
| /* Mark the dimensions for LOOP SHIFTING */ |
| for (n = 0; n < loop->dimen; n++) |
| { |
| int dim = dest->data.info.dim[n]; |
| |
| if (lref->u.ar.dimen_type[dim] == DIMEN_VECTOR) |
| depends[n] = 2; |
| else if (! gfc_is_same_range (&lref->u.ar, |
| &rref->u.ar, dim, 0)) |
| depends[n] = 1; |
| } |
| |
| /* Put all the dimensions with dependencies in the |
| innermost loops. */ |
| dim = 0; |
| for (n = 0; n < loop->dimen; n++) |
| { |
| gcc_assert (loop->order[n] == n); |
| if (depends[n]) |
| loop->order[dim++] = n; |
| } |
| for (n = 0; n < loop->dimen; n++) |
| { |
| if (! depends[n]) |
| loop->order[dim++] = n; |
| } |
| |
| gcc_assert (dim == loop->dimen); |
| break; |
| } |
| #endif |
| } |
| } |
| |
| temporary: |
| |
| if (nDepend == 1) |
| { |
| tree base_type = gfc_typenode_for_spec (&dest_expr->ts); |
| if (GFC_ARRAY_TYPE_P (base_type) |
| || GFC_DESCRIPTOR_TYPE_P (base_type)) |
| base_type = gfc_get_element_type (base_type); |
| loop->temp_ss = gfc_get_temp_ss (base_type, dest->info->string_length, |
| loop->dimen); |
| gfc_add_ss_to_loop (loop, loop->temp_ss); |
| } |
| else |
| loop->temp_ss = NULL; |
| } |
| |
| |
| /* Browse through each array's information from the scalarizer and set the loop |
| bounds according to the "best" one (per dimension), i.e. the one which |
| provides the most information (constant bounds, shape, etc.). */ |
| |
| static void |
| set_loop_bounds (gfc_loopinfo *loop) |
| { |
| int n, dim, spec_dim; |
| gfc_array_info *info; |
| gfc_array_info *specinfo; |
| gfc_ss *ss; |
| tree tmp; |
| gfc_ss **loopspec; |
| bool dynamic[GFC_MAX_DIMENSIONS]; |
| mpz_t *cshape; |
| mpz_t i; |
| bool nonoptional_arr; |
| |
| gfc_loopinfo * const outer_loop = outermost_loop (loop); |
| |
| loopspec = loop->specloop; |
| |
| mpz_init (i); |
| for (n = 0; n < loop->dimen; n++) |
| { |
| loopspec[n] = NULL; |
| dynamic[n] = false; |
| |
| /* If there are both optional and nonoptional array arguments, scalarize |
| over the nonoptional; otherwise, it does not matter as then all |
| (optional) arrays have to be present per F2008, 125.2.12p3(6). */ |
| |
| nonoptional_arr = false; |
| |
| for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain) |
| if (ss->info->type != GFC_SS_SCALAR && ss->info->type != GFC_SS_TEMP |
| && ss->info->type != GFC_SS_REFERENCE && !ss->info->can_be_null_ref) |
| { |
| nonoptional_arr = true; |
| break; |
| } |
| |
| /* We use one SS term, and use that to determine the bounds of the |
| loop for this dimension. We try to pick the simplest term. */ |
| for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain) |
| { |
| gfc_ss_type ss_type; |
| |
| ss_type = ss->info->type; |
| if (ss_type == GFC_SS_SCALAR |
| || ss_type == GFC_SS_TEMP |
| || ss_type == GFC_SS_REFERENCE |
| || (ss->info->can_be_null_ref && nonoptional_arr)) |
| continue; |
| |
| info = &ss->info->data.array; |
| dim = ss->dim[n]; |
| |
| if (loopspec[n] != NULL) |
| { |
| specinfo = &loopspec[n]->info->data.array; |
| spec_dim = loopspec[n]->dim[n]; |
| } |
| else |
| { |
| /* Silence uninitialized warnings. */ |
| specinfo = NULL; |
| spec_dim = 0; |
| } |
| |
| if (info->shape) |
| { |
| gcc_assert (info->shape[dim]); |
| /* The frontend has worked out the size for us. */ |
| if (!loopspec[n] |
| || !specinfo->shape |
| || !integer_zerop (specinfo->start[spec_dim])) |
| /* Prefer zero-based descriptors if possible. */ |
| loopspec[n] = ss; |
| continue; |
| } |
| |
| if (ss_type == GFC_SS_CONSTRUCTOR) |
| { |
| gfc_constructor_base base; |
| /* An unknown size constructor will always be rank one. |
| Higher rank constructors will either have known shape, |
| or still be wrapped in a call to reshape. */ |
| gcc_assert (loop->dimen == 1); |
| |
| /* Always prefer to use the constructor bounds if the size |
| can be determined at compile time. Prefer not to otherwise, |
| since the general case involves realloc, and it's better to |
| avoid that overhead if possible. */ |
| base = ss->info->expr->value.constructor; |
| dynamic[n] = gfc_get_array_constructor_size (&i, base); |
| if (!dynamic[n] || !loopspec[n]) |
| loopspec[n] = ss; |
| continue; |
| } |
| |
| /* Avoid using an allocatable lhs in an assignment, since |
| there might be a reallocation coming. */ |
| if (loopspec[n] && ss->is_alloc_lhs) |
| continue; |
| |
| if (!loopspec[n]) |
| loopspec[n] = ss; |
| /* Criteria for choosing a loop specifier (most important first): |
| doesn't need realloc |
| stride of one |
| known stride |
| known lower bound |
| known upper bound |
| */ |
| else if (loopspec[n]->info->type == GFC_SS_CONSTRUCTOR && dynamic[n]) |
| loopspec[n] = ss; |
| else if (integer_onep (info->stride[dim]) |
| && !integer_onep (specinfo->stride[spec_dim])) |
| loopspec[n] = ss; |
| else if (INTEGER_CST_P (info->stride[dim]) |
| && !INTEGER_CST_P (specinfo->stride[spec_dim])) |
| loopspec[n] = ss; |
| else if (INTEGER_CST_P (info->start[dim]) |
| && !INTEGER_CST_P (specinfo->start[spec_dim]) |
| && integer_onep (info->stride[dim]) |
| == integer_onep (specinfo->stride[spec_dim]) |
| && INTEGER_CST_P (info->stride[dim]) |
| == INTEGER_CST_P (specinfo->stride[spec_dim])) |
| loopspec[n] = ss; |
| /* We don't work out the upper bound. |
| else if (INTEGER_CST_P (info->finish[n]) |
| && ! INTEGER_CST_P (specinfo->finish[n])) |
| loopspec[n] = ss; */ |
| } |
| |
| /* We should have found the scalarization loop specifier. If not, |
| that's bad news. */ |
| gcc_assert (loopspec[n]); |
| |
| info = &loopspec[n]->info->data.array; |
| dim = loopspec[n]->dim[n]; |
| |
| /* Set the extents of this range. */ |
| cshape = info->shape; |
| if (cshape && INTEGER_CST_P (info->start[dim]) |
| && INTEGER_CST_P (info->stride[dim])) |
| { |
| loop->from[n] = info->start[dim]; |
| mpz_set (i, cshape[get_array_ref_dim_for_loop_dim (loopspec[n], n)]); |
| mpz_sub_ui (i, i, 1); |
| /* To = from + (size - 1) * stride. */ |
| tmp = gfc_conv_mpz_to_tree (i, gfc_index_integer_kind); |
| if (!integer_onep (info->stride[dim])) |
| tmp = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, tmp, |
| info->stride[dim]); |
| loop->to[n] = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| loop->from[n], tmp); |
| } |
| else |
| { |
| loop->from[n] = info->start[dim]; |
| switch (loopspec[n]->info->type) |
| { |
| case GFC_SS_CONSTRUCTOR: |
| /* The upper bound is calculated when we expand the |
| constructor. */ |
| gcc_assert (loop->to[n] == NULL_TREE); |
| break; |
| |
| case GFC_SS_SECTION: |
| /* Use the end expression if it exists and is not constant, |
| so that it is only evaluated once. */ |
| loop->to[n] = info->end[dim]; |
| break; |
| |
| case GFC_SS_FUNCTION: |
| /* The loop bound will be set when we generate the call. */ |
| gcc_assert (loop->to[n] == NULL_TREE); |
| break; |
| |
| case GFC_SS_INTRINSIC: |
| { |
| gfc_expr *expr = loopspec[n]->info->expr; |
| |
| /* The {l,u}bound of an assumed rank. */ |
| gcc_assert ((expr->value.function.isym->id == GFC_ISYM_LBOUND |
| || expr->value.function.isym->id == GFC_ISYM_UBOUND) |
| && expr->value.function.actual->next->expr == NULL |
| && expr->value.function.actual->expr->rank == -1); |
| |
| loop->to[n] = info->end[dim]; |
| break; |
| } |
| |
| case GFC_SS_COMPONENT: |
| { |
| if (info->end[dim] != NULL_TREE) |
| { |
| loop->to[n] = info->end[dim]; |
| break; |
| } |
| else |
| gcc_unreachable (); |
| } |
| |
| default: |
| gcc_unreachable (); |
| } |
| } |
| |
| /* Transform everything so we have a simple incrementing variable. */ |
| if (integer_onep (info->stride[dim])) |
| info->delta[dim] = gfc_index_zero_node; |
| else |
| { |
| /* Set the delta for this section. */ |
| info->delta[dim] = gfc_evaluate_now (loop->from[n], &outer_loop->pre); |
| /* Number of iterations is (end - start + step) / step. |
| with start = 0, this simplifies to |
| last = end / step; |
| for (i = 0; i<=last; i++){...}; */ |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, loop->to[n], |
| loop->from[n]); |
| tmp = fold_build2_loc (input_location, FLOOR_DIV_EXPR, |
| gfc_array_index_type, tmp, info->stride[dim]); |
| tmp = fold_build2_loc (input_location, MAX_EXPR, gfc_array_index_type, |
| tmp, build_int_cst (gfc_array_index_type, -1)); |
| loop->to[n] = gfc_evaluate_now (tmp, &outer_loop->pre); |
| /* Make the loop variable start at 0. */ |
| loop->from[n] = gfc_index_zero_node; |
| } |
| } |
| mpz_clear (i); |
| |
| for (loop = loop->nested; loop; loop = loop->next) |
| set_loop_bounds (loop); |
| } |
| |
| |
| /* Initialize the scalarization loop. Creates the loop variables. Determines |
| the range of the loop variables. Creates a temporary if required. |
| Also generates code for scalar expressions which have been |
| moved outside the loop. */ |
| |
| void |
| gfc_conv_loop_setup (gfc_loopinfo * loop, locus * where) |
| { |
| gfc_ss *tmp_ss; |
| tree tmp; |
| |
| set_loop_bounds (loop); |
| |
| /* Add all the scalar code that can be taken out of the loops. |
| This may include calculating the loop bounds, so do it before |
| allocating the temporary. */ |
| gfc_add_loop_ss_code (loop, loop->ss, false, where); |
| |
| tmp_ss = loop->temp_ss; |
| /* If we want a temporary then create it. */ |
| if (tmp_ss != NULL) |
| { |
| gfc_ss_info *tmp_ss_info; |
| |
| tmp_ss_info = tmp_ss->info; |
| gcc_assert (tmp_ss_info->type == GFC_SS_TEMP); |
| gcc_assert (loop->parent == NULL); |
| |
| /* Make absolutely sure that this is a complete type. */ |
| if (tmp_ss_info->string_length) |
| tmp_ss_info->data.temp.type |
| = gfc_get_character_type_len_for_eltype |
| (TREE_TYPE (tmp_ss_info->data.temp.type), |
| tmp_ss_info->string_length); |
| |
| tmp = tmp_ss_info->data.temp.type; |
| memset (&tmp_ss_info->data.array, 0, sizeof (gfc_array_info)); |
| tmp_ss_info->type = GFC_SS_SECTION; |
| |
| gcc_assert (tmp_ss->dimen != 0); |
| |
| gfc_trans_create_temp_array (&loop->pre, &loop->post, tmp_ss, tmp, |
| NULL_TREE, false, true, false, where); |
| } |
| |
| /* For array parameters we don't have loop variables, so don't calculate the |
| translations. */ |
| if (!loop->array_parameter) |
| gfc_set_delta (loop); |
| } |
| |
| |
| /* Calculates how to transform from loop variables to array indices for each |
| array: once loop bounds are chosen, sets the difference (DELTA field) between |
| loop bounds and array reference bounds, for each array info. */ |
| |
| void |
| gfc_set_delta (gfc_loopinfo *loop) |
| { |
| gfc_ss *ss, **loopspec; |
| gfc_array_info *info; |
| tree tmp; |
| int n, dim; |
| |
| gfc_loopinfo * const outer_loop = outermost_loop (loop); |
| |
| loopspec = loop->specloop; |
| |
| /* Calculate the translation from loop variables to array indices. */ |
| for (ss = loop->ss; ss != gfc_ss_terminator; ss = ss->loop_chain) |
| { |
| gfc_ss_type ss_type; |
| |
| ss_type = ss->info->type; |
| if (ss_type != GFC_SS_SECTION |
| && ss_type != GFC_SS_COMPONENT |
| && ss_type != GFC_SS_CONSTRUCTOR) |
| continue; |
| |
| info = &ss->info->data.array; |
| |
| for (n = 0; n < ss->dimen; n++) |
| { |
| /* If we are specifying the range the delta is already set. */ |
| if (loopspec[n] != ss) |
| { |
| dim = ss->dim[n]; |
| |
| /* Calculate the offset relative to the loop variable. |
| First multiply by the stride. */ |
| tmp = loop->from[n]; |
| if (!integer_onep (info->stride[dim])) |
| tmp = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, |
| tmp, info->stride[dim]); |
| |
| /* Then subtract this from our starting value. */ |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| info->start[dim], tmp); |
| |
| info->delta[dim] = gfc_evaluate_now (tmp, &outer_loop->pre); |
| } |
| } |
| } |
| |
| for (loop = loop->nested; loop; loop = loop->next) |
| gfc_set_delta (loop); |
| } |
| |
| |
| /* Calculate the size of a given array dimension from the bounds. This |
| is simply (ubound - lbound + 1) if this expression is positive |
| or 0 if it is negative (pick either one if it is zero). Optionally |
| (if or_expr is present) OR the (expression != 0) condition to it. */ |
| |
| tree |
| gfc_conv_array_extent_dim (tree lbound, tree ubound, tree* or_expr) |
| { |
| tree res; |
| tree cond; |
| |
| /* Calculate (ubound - lbound + 1). */ |
| res = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type, |
| ubound, lbound); |
| res = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type, res, |
| gfc_index_one_node); |
| |
| /* Check whether the size for this dimension is negative. */ |
| cond = fold_build2_loc (input_location, LE_EXPR, logical_type_node, res, |
| gfc_index_zero_node); |
| res = fold_build3_loc (input_location, COND_EXPR, gfc_array_index_type, cond, |
| gfc_index_zero_node, res); |
| |
| /* Build OR expression. */ |
| if (or_expr) |
| *or_expr = fold_build2_loc (input_location, TRUTH_OR_EXPR, |
| logical_type_node, *or_expr, cond); |
| |
| return res; |
| } |
| |
| |
| /* For an array descriptor, get the total number of elements. This is just |
| the product of the extents along from_dim to to_dim. */ |
| |
| static tree |
| gfc_conv_descriptor_size_1 (tree desc, int from_dim, int to_dim) |
| { |
| tree res; |
| int dim; |
| |
| res = gfc_index_one_node; |
| |
| for (dim = from_dim; dim < to_dim; ++dim) |
| { |
| tree lbound; |
| tree ubound; |
| tree extent; |
| |
| lbound = gfc_conv_descriptor_lbound_get (desc, gfc_rank_cst[dim]); |
| ubound = gfc_conv_descriptor_ubound_get (desc, gfc_rank_cst[dim]); |
| |
| extent = gfc_conv_array_extent_dim (lbound, ubound, NULL); |
| res = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type, |
| res, extent); |
| } |
| |
| return res; |
| } |
| |
| |
| /* Full size of an array. */ |
| |
| tree |
| gfc_conv_descriptor_size (tree desc, int rank) |
| { |
| return gfc_conv_descriptor_size_1 (desc, 0, rank); |
| } |
| |
| |
| /* Size of a coarray for all dimensions but the last. */ |
| |
| tree |
| gfc_conv_descriptor_cosize (tree desc, int rank, int corank) |
| { |
| return gfc_conv_descriptor_size_1 (desc, rank, rank + corank - 1); |
| } |
| |
| |
| /* Fills in an array descriptor, and returns the size of the array. |
| The size will be a simple_val, ie a variable or a constant. Also |
| calculates the offset of the base. The pointer argument overflow, |
| which should be of integer type, will increase in value if overflow |
| occurs during the size calculation. Returns the size of the array. |
| { |
| stride = 1; |
| offset = 0; |
| for (n = 0; n < rank; n++) |
| { |
| a.lbound[n] = specified_lower_bound; |
| offset = offset + a.lbond[n] * stride; |
| size = 1 - lbound; |
| a.ubound[n] = specified_upper_bound; |
| a.stride[n] = stride; |
| size = size >= 0 ? ubound + size : 0; //size = ubound + 1 - lbound |
| overflow += size == 0 ? 0: (MAX/size < stride ? 1: 0); |
| stride = stride * size; |
| } |
| for (n = rank; n < rank+corank; n++) |
| (Set lcobound/ucobound as above.) |
| element_size = sizeof (array element); |
| if (!rank) |
| return element_size |
| stride = (size_t) stride; |
| overflow += element_size == 0 ? 0: (MAX/element_size < stride ? 1: 0); |
| stride = stride * element_size; |
| return (stride); |
| } */ |
| /*GCC ARRAYS*/ |
| |
| static tree |
| gfc_array_init_size (tree descriptor, int rank, int corank, tree * poffset, |
| gfc_expr ** lower, gfc_expr ** upper, stmtblock_t * pblock, |
| stmtblock_t * descriptor_block, tree * overflow, |
| tree expr3_elem_size, tree *nelems, gfc_expr *expr3, |
| tree expr3_desc, bool e3_is_array_constr, gfc_expr *expr) |
| { |
| tree type; |
| tree tmp; |
| tree size; |
| tree offset; |
| tree stride; |
| tree element_size; |
| tree or_expr; |
| tree thencase; |
| tree elsecase; |
| tree cond; |
| tree var; |
| stmtblock_t thenblock; |
| stmtblock_t elseblock; |
| gfc_expr *ubound; |
| gfc_se se; |
| int n; |
| |
| type = TREE_TYPE (descriptor); |
| |
| stride = gfc_index_one_node; |
| offset = gfc_index_zero_node; |
| |
| /* Set the dtype before the alloc, because registration of coarrays needs |
| it initialized. */ |
| if (expr->ts.type == BT_CHARACTER |
| && expr->ts.deferred |
| && VAR_P (expr->ts.u.cl->backend_decl)) |
| { |
| type = gfc_typenode_for_spec (&expr->ts); |
| tmp = gfc_conv_descriptor_dtype (descriptor); |
| gfc_add_modify (pblock, tmp, gfc_get_dtype_rank_type (rank, type)); |
| } |
| else |
| { |
| tmp = gfc_conv_descriptor_dtype (descriptor); |
| gfc_add_modify (pblock, tmp, gfc_get_dtype (type)); |
| } |
| |
| or_expr = logical_false_node; |
| |
| for (n = 0; n < rank; n++) |
| { |
| tree conv_lbound; |
| tree conv_ubound; |
| |
| /* We have 3 possibilities for determining the size of the array: |
| lower == NULL => lbound = 1, ubound = upper[n] |
| upper[n] = NULL => lbound = 1, ubound = lower[n] |
| upper[n] != NULL => lbound = lower[n], ubound = upper[n] */ |
| ubound = upper[n]; |
| |
| /* Set lower bound. */ |
| gfc_init_se (&se, NULL); |
| if (expr3_desc != NULL_TREE) |
| { |
| if (e3_is_array_constr) |
| /* The lbound of a constant array [] starts at zero, but when |
| allocating it, the standard expects the array to start at |
| one. */ |
| se.expr = gfc_index_one_node; |
| else |
| se.expr = gfc_conv_descriptor_lbound_get (expr3_desc, |
| gfc_rank_cst[n]); |
| } |
| else if (lower == NULL) |
| se.expr = gfc_index_one_node; |
| else |
| { |
| gcc_assert (lower[n]); |
| if (ubound) |
| { |
| gfc_conv_expr_type (&se, lower[n], gfc_array_index_type); |
| gfc_add_block_to_block (pblock, &se.pre); |
| } |
| else |
| { |
| se.expr = gfc_index_one_node; |
| ubound = lower[n]; |
| } |
| } |
| gfc_conv_descriptor_lbound_set (descriptor_block, descriptor, |
| gfc_rank_cst[n], se.expr); |
| conv_lbound = se.expr; |
| |
| /* Work out the offset for this component. */ |
| tmp = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type, |
| se.expr, stride); |
| offset = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, offset, tmp); |
| |
| /* Set upper bound. */ |
| gfc_init_se (&se, NULL); |
| if (expr3_desc != NULL_TREE) |
| { |
| if (e3_is_array_constr) |
| { |
| /* The lbound of a constant array [] starts at zero, but when |
| allocating it, the standard expects the array to start at |
| one. Therefore fix the upper bound to be |
| (desc.ubound - desc.lbound)+ 1. */ |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| gfc_conv_descriptor_ubound_get ( |
| expr3_desc, gfc_rank_cst[n]), |
| gfc_conv_descriptor_lbound_get ( |
| expr3_desc, gfc_rank_cst[n])); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, tmp, |
| gfc_index_one_node); |
| se.expr = gfc_evaluate_now (tmp, pblock); |
| } |
| else |
| se.expr = gfc_conv_descriptor_ubound_get (expr3_desc, |
| gfc_rank_cst[n]); |
| } |
| else |
| { |
| gcc_assert (ubound); |
| gfc_conv_expr_type (&se, ubound, gfc_array_index_type); |
| gfc_add_block_to_block (pblock, &se.pre); |
| if (ubound->expr_type == EXPR_FUNCTION) |
| se.expr = gfc_evaluate_now (se.expr, pblock); |
| } |
| gfc_conv_descriptor_ubound_set (descriptor_block, descriptor, |
| gfc_rank_cst[n], se.expr); |
| conv_ubound = se.expr; |
| |
| /* Store the stride. */ |
| gfc_conv_descriptor_stride_set (descriptor_block, descriptor, |
| gfc_rank_cst[n], stride); |
| |
| /* Calculate size and check whether extent is negative. */ |
| size = gfc_conv_array_extent_dim (conv_lbound, conv_ubound, &or_expr); |
| size = gfc_evaluate_now (size, pblock); |
| |
| /* Check whether multiplying the stride by the number of |
| elements in this dimension would overflow. We must also check |
| whether the current dimension has zero size in order to avoid |
| division by zero. |
| */ |
| tmp = fold_build2_loc (input_location, TRUNC_DIV_EXPR, |
| gfc_array_index_type, |
| fold_convert (gfc_array_index_type, |
| TYPE_MAX_VALUE (gfc_array_index_type)), |
| size); |
| cond = gfc_unlikely (fold_build2_loc (input_location, LT_EXPR, |
| logical_type_node, tmp, stride), |
| PRED_FORTRAN_OVERFLOW); |
| tmp = fold_build3_loc (input_location, COND_EXPR, integer_type_node, cond, |
| integer_one_node, integer_zero_node); |
| cond = gfc_unlikely (fold_build2_loc (input_location, EQ_EXPR, |
| logical_type_node, size, |
| gfc_index_zero_node), |
| PRED_FORTRAN_SIZE_ZERO); |
| tmp = fold_build3_loc (input_location, COND_EXPR, integer_type_node, cond, |
| integer_zero_node, tmp); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, integer_type_node, |
| *overflow, tmp); |
| *overflow = gfc_evaluate_now (tmp, pblock); |
| |
| /* Multiply the stride by the number of elements in this dimension. */ |
| stride = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, stride, size); |
| stride = gfc_evaluate_now (stride, pblock); |
| } |
| |
| for (n = rank; n < rank + corank; n++) |
| { |
| ubound = upper[n]; |
| |
| /* Set lower bound. */ |
| gfc_init_se (&se, NULL); |
| if (lower == NULL || lower[n] == NULL) |
| { |
| gcc_assert (n == rank + corank - 1); |
| se.expr = gfc_index_one_node; |
| } |
| else |
| { |
| if (ubound || n == rank + corank - 1) |
| { |
| gfc_conv_expr_type (&se, lower[n], gfc_array_index_type); |
| gfc_add_block_to_block (pblock, &se.pre); |
| } |
| else |
| { |
| se.expr = gfc_index_one_node; |
| ubound = lower[n]; |
| } |
| } |
| gfc_conv_descriptor_lbound_set (descriptor_block, descriptor, |
| gfc_rank_cst[n], se.expr); |
| |
| if (n < rank + corank - 1) |
| { |
| gfc_init_se (&se, NULL); |
| gcc_assert (ubound); |
| gfc_conv_expr_type (&se, ubound, gfc_array_index_type); |
| gfc_add_block_to_block (pblock, &se.pre); |
| gfc_conv_descriptor_ubound_set (descriptor_block, descriptor, |
| gfc_rank_cst[n], se.expr); |
| } |
| } |
| |
| /* The stride is the number of elements in the array, so multiply by the |
| size of an element to get the total size. Obviously, if there is a |
| SOURCE expression (expr3) we must use its element size. */ |
| if (expr3_elem_size != NULL_TREE) |
| tmp = expr3_elem_size; |
| else if (expr3 != NULL) |
| { |
| if (expr3->ts.type == BT_CLASS) |
| { |
| gfc_se se_sz; |
| gfc_expr *sz = gfc_copy_expr (expr3); |
| gfc_add_vptr_component (sz); |
| gfc_add_size_component (sz); |
| gfc_init_se (&se_sz, NULL); |
| gfc_conv_expr (&se_sz, sz); |
| gfc_free_expr (sz); |
| tmp = se_sz.expr; |
| } |
| else |
| { |
| tmp = gfc_typenode_for_spec (&expr3->ts); |
| tmp = TYPE_SIZE_UNIT (tmp); |
| } |
| } |
| else |
| tmp = TYPE_SIZE_UNIT (gfc_get_element_type (type)); |
| |
| /* Convert to size_t. */ |
| element_size = fold_convert (size_type_node, tmp); |
| |
| if (rank == 0) |
| return element_size; |
| |
| *nelems = gfc_evaluate_now (stride, pblock); |
| stride = fold_convert (size_type_node, stride); |
| |
| /* First check for overflow. Since an array of type character can |
| have zero element_size, we must check for that before |
| dividing. */ |
| tmp = fold_build2_loc (input_location, TRUNC_DIV_EXPR, |
| size_type_node, |
| TYPE_MAX_VALUE (size_type_node), element_size); |
| cond = gfc_unlikely (fold_build2_loc (input_location, LT_EXPR, |
| logical_type_node, tmp, stride), |
| PRED_FORTRAN_OVERFLOW); |
| tmp = fold_build3_loc (input_location, COND_EXPR, integer_type_node, cond, |
| integer_one_node, integer_zero_node); |
| cond = gfc_unlikely (fold_build2_loc (input_location, EQ_EXPR, |
| logical_type_node, element_size, |
| build_int_cst (size_type_node, 0)), |
| PRED_FORTRAN_SIZE_ZERO); |
| tmp = fold_build3_loc (input_location, COND_EXPR, integer_type_node, cond, |
| integer_zero_node, tmp); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, integer_type_node, |
| *overflow, tmp); |
| *overflow = gfc_evaluate_now (tmp, pblock); |
| |
| size = fold_build2_loc (input_location, MULT_EXPR, size_type_node, |
| stride, element_size); |
| |
| if (poffset != NULL) |
| { |
| offset = gfc_evaluate_now (offset, pblock); |
| *poffset = offset; |
| } |
| |
| if (integer_zerop (or_expr)) |
| return size; |
| if (integer_onep (or_expr)) |
| return build_int_cst (size_type_node, 0); |
| |
| var = gfc_create_var (TREE_TYPE (size), "size"); |
| gfc_start_block (&thenblock); |
| gfc_add_modify (&thenblock, var, build_int_cst (size_type_node, 0)); |
| thencase = gfc_finish_block (&thenblock); |
| |
| gfc_start_block (&elseblock); |
| gfc_add_modify (&elseblock, var, size); |
| elsecase = gfc_finish_block (&elseblock); |
| |
| tmp = gfc_evaluate_now (or_expr, pblock); |
| tmp = build3_v (COND_EXPR, tmp, thencase, elsecase); |
| gfc_add_expr_to_block (pblock, tmp); |
| |
| return var; |
| } |
| |
| |
| /* Retrieve the last ref from the chain. This routine is specific to |
| gfc_array_allocate ()'s needs. */ |
| |
| bool |
| retrieve_last_ref (gfc_ref **ref_in, gfc_ref **prev_ref_in) |
| { |
| gfc_ref *ref, *prev_ref; |
| |
| ref = *ref_in; |
| /* Prevent warnings for uninitialized variables. */ |
| prev_ref = *prev_ref_in; |
| while (ref && ref->next != NULL) |
| { |
| gcc_assert (ref->type != REF_ARRAY || ref->u.ar.type == AR_ELEMENT |
| || (ref->u.ar.dimen == 0 && ref->u.ar.codimen > 0)); |
| prev_ref = ref; |
| ref = ref->next; |
| } |
| |
| if (ref == NULL || ref->type != REF_ARRAY) |
| return false; |
| |
| *ref_in = ref; |
| *prev_ref_in = prev_ref; |
| return true; |
| } |
| |
| /* Initializes the descriptor and generates a call to _gfor_allocate. Does |
| the work for an ALLOCATE statement. */ |
| /*GCC ARRAYS*/ |
| |
| bool |
| gfc_array_allocate (gfc_se * se, gfc_expr * expr, tree status, tree errmsg, |
| tree errlen, tree label_finish, tree expr3_elem_size, |
| tree *nelems, gfc_expr *expr3, tree e3_arr_desc, |
| bool e3_is_array_constr) |
| { |
| tree tmp; |
| tree pointer; |
| tree offset = NULL_TREE; |
| tree token = NULL_TREE; |
| tree size; |
| tree msg; |
| tree error = NULL_TREE; |
| tree overflow; /* Boolean storing whether size calculation overflows. */ |
| tree var_overflow = NULL_TREE; |
| tree cond; |
| tree set_descriptor; |
| stmtblock_t set_descriptor_block; |
| stmtblock_t elseblock; |
| gfc_expr **lower; |
| gfc_expr **upper; |
| gfc_ref *ref, *prev_ref = NULL, *coref; |
| bool allocatable, coarray, dimension, alloc_w_e3_arr_spec = false, |
| non_ulimate_coarray_ptr_comp; |
| |
| ref = expr->ref; |
| |
| /* Find the last reference in the chain. */ |
| if (!retrieve_last_ref (&ref, &prev_ref)) |
| return false; |
| |
| /* Take the allocatable and coarray properties solely from the expr-ref's |
| attributes and not from source=-expression. */ |
| if (!prev_ref) |
| { |
| allocatable = expr->symtree->n.sym->attr.allocatable; |
| dimension = expr->symtree->n.sym->attr.dimension; |
| non_ulimate_coarray_ptr_comp = false; |
| } |
| else |
| { |
| allocatable = prev_ref->u.c.component->attr.allocatable; |
| /* Pointer components in coarrayed derived types must be treated |
| specially in that they are registered without a check if the are |
| already associated. This does not hold for ultimate coarray |
| pointers. */ |
| non_ulimate_coarray_ptr_comp = (prev_ref->u.c.component->attr.pointer |
| && !prev_ref->u.c.component->attr.codimension); |
| dimension = prev_ref->u.c.component->attr.dimension; |
| } |
| |
| /* For allocatable/pointer arrays in derived types, one of the refs has to be |
| a coarray. In this case it does not matter whether we are on this_image |
| or not. */ |
| coarray = false; |
| for (coref = expr->ref; coref; coref = coref->next) |
| if (coref->type == REF_ARRAY && coref->u.ar.codimen > 0) |
| { |
| coarray = true; |
| break; |
| } |
| |
| if (!dimension) |
| gcc_assert (coarray); |
| |
| if (ref->u.ar.type == AR_FULL && expr3 != NULL) |
| { |
| gfc_ref *old_ref = ref; |
| /* F08:C633: Array shape from expr3. */ |
| ref = expr3->ref; |
| |
| /* Find the last reference in the chain. */ |
| if (!retrieve_last_ref (&ref, &prev_ref)) |
| { |
| if (expr3->expr_type == EXPR_FUNCTION |
| && gfc_expr_attr (expr3).dimension) |
| ref = old_ref; |
| else |
| return false; |
| } |
| alloc_w_e3_arr_spec = true; |
| } |
| |
| /* Figure out the size of the array. */ |
| switch (ref->u.ar.type) |
| { |
| case AR_ELEMENT: |
| if (!coarray) |
| { |
| lower = NULL; |
| upper = ref->u.ar.start; |
| break; |
| } |
| /* Fall through. */ |
| |
| case AR_SECTION: |
| lower = ref->u.ar.start; |
| upper = ref->u.ar.end; |
| break; |
| |
| case AR_FULL: |
| gcc_assert (ref->u.ar.as->type == AS_EXPLICIT |
| || alloc_w_e3_arr_spec); |
| |
| lower = ref->u.ar.as->lower; |
| upper = ref->u.ar.as->upper; |
| break; |
| |
| default: |
| gcc_unreachable (); |
| break; |
| } |
| |
| overflow = integer_zero_node; |
| |
| gfc_init_block (&set_descriptor_block); |
| /* Take the corank only from the actual ref and not from the coref. The |
| later will mislead the generation of the array dimensions for allocatable/ |
| pointer components in derived types. */ |
| size = gfc_array_init_size (se->expr, alloc_w_e3_arr_spec ? expr->rank |
| : ref->u.ar.as->rank, |
| coarray ? ref->u.ar.as->corank : 0, |
| &offset, lower, upper, |
| &se->pre, &set_descriptor_block, &overflow, |
| expr3_elem_size, nelems, expr3, e3_arr_desc, |
| e3_is_array_constr, expr); |
| |
| if (dimension) |
| { |
| var_overflow = gfc_create_var (integer_type_node, "overflow"); |
| gfc_add_modify (&se->pre, var_overflow, overflow); |
| |
| if (status == NULL_TREE) |
| { |
| /* Generate the block of code handling overflow. */ |
| msg = gfc_build_addr_expr (pchar_type_node, |
| gfc_build_localized_cstring_const |
| ("Integer overflow when calculating the amount of " |
| "memory to allocate")); |
| error = build_call_expr_loc (input_location, |
| gfor_fndecl_runtime_error, 1, msg); |
| } |
| else |
| { |
| tree status_type = TREE_TYPE (status); |
| stmtblock_t set_status_block; |
| |
| gfc_start_block (&set_status_block); |
| gfc_add_modify (&set_status_block, status, |
| build_int_cst (status_type, LIBERROR_ALLOCATION)); |
| error = gfc_finish_block (&set_status_block); |
| } |
| } |
| |
| gfc_start_block (&elseblock); |
| |
| /* Allocate memory to store the data. */ |
| if (POINTER_TYPE_P (TREE_TYPE (se->expr))) |
| se->expr = build_fold_indirect_ref_loc (input_location, se->expr); |
| |
| if (coarray && flag_coarray == GFC_FCOARRAY_LIB) |
| { |
| pointer = non_ulimate_coarray_ptr_comp ? se->expr |
| : gfc_conv_descriptor_data_get (se->expr); |
| token = gfc_conv_descriptor_token (se->expr); |
| token = gfc_build_addr_expr (NULL_TREE, token); |
| } |
| else |
| pointer = gfc_conv_descriptor_data_get (se->expr); |
| STRIP_NOPS (pointer); |
| |
| /* The allocatable variant takes the old pointer as first argument. */ |
| if (allocatable) |
| gfc_allocate_allocatable (&elseblock, pointer, size, token, |
| status, errmsg, errlen, label_finish, expr, |
| coref != NULL ? coref->u.ar.as->corank : 0); |
| else if (non_ulimate_coarray_ptr_comp && token) |
| /* The token is set only for GFC_FCOARRAY_LIB mode. */ |
| gfc_allocate_using_caf_lib (&elseblock, pointer, size, token, status, |
| errmsg, errlen, |
| GFC_CAF_COARRAY_ALLOC_ALLOCATE_ONLY); |
| else |
| gfc_allocate_using_malloc (&elseblock, pointer, size, status); |
| |
| if (dimension) |
| { |
| cond = gfc_unlikely (fold_build2_loc (input_location, NE_EXPR, |
| logical_type_node, var_overflow, integer_zero_node), |
| PRED_FORTRAN_OVERFLOW); |
| tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node, cond, |
| error, gfc_finish_block (&elseblock)); |
| } |
| else |
| tmp = gfc_finish_block (&elseblock); |
| |
| gfc_add_expr_to_block (&se->pre, tmp); |
| |
| /* Update the array descriptors. */ |
| if (dimension) |
| gfc_conv_descriptor_offset_set (&set_descriptor_block, se->expr, offset); |
| |
| /* Pointer arrays need the span field to be set. */ |
| if (is_pointer_array (se->expr) |
| || (expr->ts.type == BT_CLASS |
| && CLASS_DATA (expr)->attr.class_pointer)) |
| { |
| if (expr3 && expr3_elem_size != NULL_TREE) |
| tmp = expr3_elem_size; |
| else |
| tmp = TYPE_SIZE_UNIT (gfc_get_element_type (TREE_TYPE (se->expr))); |
| tmp = fold_convert (gfc_array_index_type, tmp); |
| gfc_conv_descriptor_span_set (&set_descriptor_block, se->expr, tmp); |
| } |
| |
| set_descriptor = gfc_finish_block (&set_descriptor_block); |
| if (status != NULL_TREE) |
| { |
| cond = fold_build2_loc (input_location, EQ_EXPR, |
| logical_type_node, status, |
| build_int_cst (TREE_TYPE (status), 0)); |
| gfc_add_expr_to_block (&se->pre, |
| fold_build3_loc (input_location, COND_EXPR, void_type_node, |
| cond, |
| set_descriptor, |
| build_empty_stmt (input_location))); |
| } |
| else |
| gfc_add_expr_to_block (&se->pre, set_descriptor); |
| |
| return true; |
| } |
| |
| |
| /* Create an array constructor from an initialization expression. |
| We assume the frontend already did any expansions and conversions. */ |
| |
| tree |
| gfc_conv_array_initializer (tree type, gfc_expr * expr) |
| { |
| gfc_constructor *c; |
| tree tmp; |
| offset_int wtmp; |
| gfc_se se; |
| tree index, range; |
| vec<constructor_elt, va_gc> *v = NULL; |
| |
| if (expr->expr_type == EXPR_VARIABLE |
| && expr->symtree->n.sym->attr.flavor == FL_PARAMETER |
| && expr->symtree->n.sym->value) |
| expr = expr->symtree->n.sym->value; |
| |
| switch (expr->expr_type) |
| { |
| case EXPR_CONSTANT: |
| case EXPR_STRUCTURE: |
| /* A single scalar or derived type value. Create an array with all |
| elements equal to that value. */ |
| gfc_init_se (&se, NULL); |
| |
| if (expr->expr_type == EXPR_CONSTANT) |
| gfc_conv_constant (&se, expr); |
| else |
| gfc_conv_structure (&se, expr, 1); |
| |
| wtmp = wi::to_offset (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) + 1; |
| /* This will probably eat buckets of memory for large arrays. */ |
| while (wtmp != 0) |
| { |
| CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, se.expr); |
| wtmp -= 1; |
| } |
| break; |
| |
| case EXPR_ARRAY: |
| /* Create a vector of all the elements. */ |
| for (c = gfc_constructor_first (expr->value.constructor); |
| c; c = gfc_constructor_next (c)) |
| { |
| if (c->iterator) |
| { |
| /* Problems occur when we get something like |
| integer :: a(lots) = (/(i, i=1, lots)/) */ |
| gfc_fatal_error ("The number of elements in the array " |
| "constructor at %L requires an increase of " |
| "the allowed %d upper limit. See " |
| "%<-fmax-array-constructor%> option", |
| &expr->where, flag_max_array_constructor); |
| return NULL_TREE; |
| } |
| if (mpz_cmp_si (c->offset, 0) != 0) |
| index = gfc_conv_mpz_to_tree (c->offset, gfc_index_integer_kind); |
| else |
| index = NULL_TREE; |
| |
| if (mpz_cmp_si (c->repeat, 1) > 0) |
| { |
| tree tmp1, tmp2; |
| mpz_t maxval; |
| |
| mpz_init (maxval); |
| mpz_add (maxval, c->offset, c->repeat); |
| mpz_sub_ui (maxval, maxval, 1); |
| tmp2 = gfc_conv_mpz_to_tree (maxval, gfc_index_integer_kind); |
| if (mpz_cmp_si (c->offset, 0) != 0) |
| { |
| mpz_add_ui (maxval, c->offset, 1); |
| tmp1 = gfc_conv_mpz_to_tree (maxval, gfc_index_integer_kind); |
| } |
| else |
| tmp1 = gfc_conv_mpz_to_tree (c->offset, gfc_index_integer_kind); |
| |
| range = fold_build2 (RANGE_EXPR, gfc_array_index_type, tmp1, tmp2); |
| mpz_clear (maxval); |
| } |
| else |
| range = NULL; |
| |
| gfc_init_se (&se, NULL); |
| switch (c->expr->expr_type) |
| { |
| case EXPR_CONSTANT: |
| gfc_conv_constant (&se, c->expr); |
| break; |
| |
| case EXPR_STRUCTURE: |
| gfc_conv_structure (&se, c->expr, 1); |
| break; |
| |
| default: |
| /* Catch those occasional beasts that do not simplify |
| for one reason or another, assuming that if they are |
| standard defying the frontend will catch them. */ |
| gfc_conv_expr (&se, c->expr); |
| break; |
| } |
| |
| if (range == NULL_TREE) |
| CONSTRUCTOR_APPEND_ELT (v, index, se.expr); |
| else |
| { |
| if (index != NULL_TREE) |
| CONSTRUCTOR_APPEND_ELT (v, index, se.expr); |
| CONSTRUCTOR_APPEND_ELT (v, range, se.expr); |
| } |
| } |
| break; |
| |
| case EXPR_NULL: |
| return gfc_build_null_descriptor (type); |
| |
| default: |
| gcc_unreachable (); |
| } |
| |
| /* Create a constructor from the list of elements. */ |
| tmp = build_constructor (type, v); |
| TREE_CONSTANT (tmp) = 1; |
| return tmp; |
| } |
| |
| |
| /* Generate code to evaluate non-constant coarray cobounds. */ |
| |
| void |
| gfc_trans_array_cobounds (tree type, stmtblock_t * pblock, |
| const gfc_symbol *sym) |
| { |
| int dim; |
| tree ubound; |
| tree lbound; |
| gfc_se se; |
| gfc_array_spec *as; |
| |
| as = IS_CLASS_ARRAY (sym) ? CLASS_DATA (sym)->as : sym->as; |
| |
| for (dim = as->rank; dim < as->rank + as->corank; dim++) |
| { |
| /* Evaluate non-constant array bound expressions. */ |
| lbound = GFC_TYPE_ARRAY_LBOUND (type, dim); |
| if (as->lower[dim] && !INTEGER_CST_P (lbound)) |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_type (&se, as->lower[dim], gfc_array_index_type); |
| gfc_add_block_to_block (pblock, &se.pre); |
| gfc_add_modify (pblock, lbound, se.expr); |
| } |
| ubound = GFC_TYPE_ARRAY_UBOUND (type, dim); |
| if (as->upper[dim] && !INTEGER_CST_P (ubound)) |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_type (&se, as->upper[dim], gfc_array_index_type); |
| gfc_add_block_to_block (pblock, &se.pre); |
| gfc_add_modify (pblock, ubound, se.expr); |
| } |
| } |
| } |
| |
| |
| /* Generate code to evaluate non-constant array bounds. Sets *poffset and |
| returns the size (in elements) of the array. */ |
| |
| static tree |
| gfc_trans_array_bounds (tree type, gfc_symbol * sym, tree * poffset, |
| stmtblock_t * pblock) |
| { |
| gfc_array_spec *as; |
| tree size; |
| tree stride; |
| tree offset; |
| tree ubound; |
| tree lbound; |
| tree tmp; |
| gfc_se se; |
| |
| int dim; |
| |
| as = IS_CLASS_ARRAY (sym) ? CLASS_DATA (sym)->as : sym->as; |
| |
| size = gfc_index_one_node; |
| offset = gfc_index_zero_node; |
| for (dim = 0; dim < as->rank; dim++) |
| { |
| /* Evaluate non-constant array bound expressions. */ |
| lbound = GFC_TYPE_ARRAY_LBOUND (type, dim); |
| if (as->lower[dim] && !INTEGER_CST_P (lbound)) |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_type (&se, as->lower[dim], gfc_array_index_type); |
| gfc_add_block_to_block (pblock, &se.pre); |
| gfc_add_modify (pblock, lbound, se.expr); |
| } |
| ubound = GFC_TYPE_ARRAY_UBOUND (type, dim); |
| if (as->upper[dim] && !INTEGER_CST_P (ubound)) |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_type (&se, as->upper[dim], gfc_array_index_type); |
| gfc_add_block_to_block (pblock, &se.pre); |
| gfc_add_modify (pblock, ubound, se.expr); |
| } |
| /* The offset of this dimension. offset = offset - lbound * stride. */ |
| tmp = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type, |
| lbound, size); |
| offset = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type, |
| offset, tmp); |
| |
| /* The size of this dimension, and the stride of the next. */ |
| if (dim + 1 < as->rank) |
| stride = GFC_TYPE_ARRAY_STRIDE (type, dim + 1); |
| else |
| stride = GFC_TYPE_ARRAY_SIZE (type); |
| |
| if (ubound != NULL_TREE && !(stride && INTEGER_CST_P (stride))) |
| { |
| /* Calculate stride = size * (ubound + 1 - lbound). */ |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| gfc_index_one_node, lbound); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, ubound, tmp); |
| tmp = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, size, tmp); |
| if (stride) |
| gfc_add_modify (pblock, stride, tmp); |
| else |
| stride = gfc_evaluate_now (tmp, pblock); |
| |
| /* Make sure that negative size arrays are translated |
| to being zero size. */ |
| tmp = fold_build2_loc (input_location, GE_EXPR, logical_type_node, |
| stride, gfc_index_zero_node); |
| tmp = fold_build3_loc (input_location, COND_EXPR, |
| gfc_array_index_type, tmp, |
| stride, gfc_index_zero_node); |
| gfc_add_modify (pblock, stride, tmp); |
| } |
| |
| size = stride; |
| } |
| |
| gfc_trans_array_cobounds (type, pblock, sym); |
| gfc_trans_vla_type_sizes (sym, pblock); |
| |
| *poffset = offset; |
| return size; |
| } |
| |
| |
| /* Generate code to initialize/allocate an array variable. */ |
| |
| void |
| gfc_trans_auto_array_allocation (tree decl, gfc_symbol * sym, |
| gfc_wrapped_block * block) |
| { |
| stmtblock_t init; |
| tree type; |
| tree tmp = NULL_TREE; |
| tree size; |
| tree offset; |
| tree space; |
| tree inittree; |
| bool onstack; |
| |
| gcc_assert (!(sym->attr.pointer || sym->attr.allocatable)); |
| |
| /* Do nothing for USEd variables. */ |
| if (sym->attr.use_assoc) |
| return; |
| |
| type = TREE_TYPE (decl); |
| gcc_assert (GFC_ARRAY_TYPE_P (type)); |
| onstack = TREE_CODE (type) != POINTER_TYPE; |
| |
| gfc_init_block (&init); |
| |
| /* Evaluate character string length. */ |
| if (sym->ts.type == BT_CHARACTER |
| && onstack && !INTEGER_CST_P (sym->ts.u.cl->backend_decl)) |
| { |
| gfc_conv_string_length (sym->ts.u.cl, NULL, &init); |
| |
| gfc_trans_vla_type_sizes (sym, &init); |
| |
| /* Emit a DECL_EXPR for this variable, which will cause the |
| gimplifier to allocate storage, and all that good stuff. */ |
| tmp = fold_build1_loc (input_location, DECL_EXPR, TREE_TYPE (decl), decl); |
| gfc_add_expr_to_block (&init, tmp); |
| } |
| |
| if (onstack) |
| { |
| gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE); |
| return; |
| } |
| |
| type = TREE_TYPE (type); |
| |
| gcc_assert (!sym->attr.use_assoc); |
| gcc_assert (!TREE_STATIC (decl)); |
| gcc_assert (!sym->module); |
| |
| if (sym->ts.type == BT_CHARACTER |
| && !INTEGER_CST_P (sym->ts.u.cl->backend_decl)) |
| gfc_conv_string_length (sym->ts.u.cl, NULL, &init); |
| |
| size = gfc_trans_array_bounds (type, sym, &offset, &init); |
| |
| /* Don't actually allocate space for Cray Pointees. */ |
| if (sym->attr.cray_pointee) |
| { |
| if (VAR_P (GFC_TYPE_ARRAY_OFFSET (type))) |
| gfc_add_modify (&init, GFC_TYPE_ARRAY_OFFSET (type), offset); |
| |
| gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE); |
| return; |
| } |
| |
| if (flag_stack_arrays) |
| { |
| gcc_assert (TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE); |
| space = build_decl (sym->declared_at.lb->location, |
| VAR_DECL, create_tmp_var_name ("A"), |
| TREE_TYPE (TREE_TYPE (decl))); |
| gfc_trans_vla_type_sizes (sym, &init); |
| } |
| else |
| { |
| /* The size is the number of elements in the array, so multiply by the |
| size of an element to get the total size. */ |
| tmp = TYPE_SIZE_UNIT (gfc_get_element_type (type)); |
| size = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type, |
| size, fold_convert (gfc_array_index_type, tmp)); |
| |
| /* Allocate memory to hold the data. */ |
| tmp = gfc_call_malloc (&init, TREE_TYPE (decl), size); |
| gfc_add_modify (&init, decl, tmp); |
| |
| /* Free the temporary. */ |
| tmp = gfc_call_free (decl); |
| space = NULL_TREE; |
| } |
| |
| /* Set offset of the array. */ |
| if (VAR_P (GFC_TYPE_ARRAY_OFFSET (type))) |
| gfc_add_modify (&init, GFC_TYPE_ARRAY_OFFSET (type), offset); |
| |
| /* Automatic arrays should not have initializers. */ |
| gcc_assert (!sym->value); |
| |
| inittree = gfc_finish_block (&init); |
| |
| if (space) |
| { |
| tree addr; |
| pushdecl (space); |
| |
| /* Don't create new scope, emit the DECL_EXPR in exactly the scope |
| where also space is located. */ |
| gfc_init_block (&init); |
| tmp = fold_build1_loc (input_location, DECL_EXPR, |
| TREE_TYPE (space), space); |
| gfc_add_expr_to_block (&init, tmp); |
| addr = fold_build1_loc (sym->declared_at.lb->location, |
| ADDR_EXPR, TREE_TYPE (decl), space); |
| gfc_add_modify (&init, decl, addr); |
| gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE); |
| tmp = NULL_TREE; |
| } |
| gfc_add_init_cleanup (block, inittree, tmp); |
| } |
| |
| |
| /* Generate entry and exit code for g77 calling convention arrays. */ |
| |
| void |
| gfc_trans_g77_array (gfc_symbol * sym, gfc_wrapped_block * block) |
| { |
| tree parm; |
| tree type; |
| locus loc; |
| tree offset; |
| tree tmp; |
| tree stmt; |
| stmtblock_t init; |
| |
| gfc_save_backend_locus (&loc); |
| gfc_set_backend_locus (&sym->declared_at); |
| |
| /* Descriptor type. */ |
| parm = sym->backend_decl; |
| type = TREE_TYPE (parm); |
| gcc_assert (GFC_ARRAY_TYPE_P (type)); |
| |
| gfc_start_block (&init); |
| |
| if (sym->ts.type == BT_CHARACTER |
| && VAR_P (sym->ts.u.cl->backend_decl)) |
| gfc_conv_string_length (sym->ts.u.cl, NULL, &init); |
| |
| /* Evaluate the bounds of the array. */ |
| gfc_trans_array_bounds (type, sym, &offset, &init); |
| |
| /* Set the offset. */ |
| if (VAR_P (GFC_TYPE_ARRAY_OFFSET (type))) |
| gfc_add_modify (&init, GFC_TYPE_ARRAY_OFFSET (type), offset); |
| |
| /* Set the pointer itself if we aren't using the parameter directly. */ |
| if (TREE_CODE (parm) != PARM_DECL) |
| { |
| tmp = convert (TREE_TYPE (parm), GFC_DECL_SAVED_DESCRIPTOR (parm)); |
| gfc_add_modify (&init, parm, tmp); |
| } |
| stmt = gfc_finish_block (&init); |
| |
| gfc_restore_backend_locus (&loc); |
| |
| /* Add the initialization code to the start of the function. */ |
| |
| if (sym->attr.optional || sym->attr.not_always_present) |
| { |
| tmp = gfc_conv_expr_present (sym); |
| stmt = build3_v (COND_EXPR, tmp, stmt, build_empty_stmt (input_location)); |
| } |
| |
| gfc_add_init_cleanup (block, stmt, NULL_TREE); |
| } |
| |
| |
| /* Modify the descriptor of an array parameter so that it has the |
| correct lower bound. Also move the upper bound accordingly. |
| If the array is not packed, it will be copied into a temporary. |
| For each dimension we set the new lower and upper bounds. Then we copy the |
| stride and calculate the offset for this dimension. We also work out |
| what the stride of a packed array would be, and see it the two match. |
| If the array need repacking, we set the stride to the values we just |
| calculated, recalculate the offset and copy the array data. |
| Code is also added to copy the data back at the end of the function. |
| */ |
| |
| void |
| gfc_trans_dummy_array_bias (gfc_symbol * sym, tree tmpdesc, |
| gfc_wrapped_block * block) |
| { |
| tree size; |
| tree type; |
| tree offset; |
| locus loc; |
| stmtblock_t init; |
| tree stmtInit, stmtCleanup; |
| tree lbound; |
| tree ubound; |
| tree dubound; |
| tree dlbound; |
| tree dumdesc; |
| tree tmp; |
| tree stride, stride2; |
| tree stmt_packed; |
| tree stmt_unpacked; |
| tree partial; |
| gfc_se se; |
| int n; |
| int checkparm; |
| int no_repack; |
| bool optional_arg; |
| gfc_array_spec *as; |
| bool is_classarray = IS_CLASS_ARRAY (sym); |
| |
| /* Do nothing for pointer and allocatable arrays. */ |
| if ((sym->ts.type != BT_CLASS && sym->attr.pointer) |
| || (sym->ts.type == BT_CLASS && CLASS_DATA (sym)->attr.class_pointer) |
| || sym->attr.allocatable |
| || (is_classarray && CLASS_DATA (sym)->attr.allocatable)) |
| return; |
| |
| if (!is_classarray && sym->attr.dummy && gfc_is_nodesc_array (sym)) |
| { |
| gfc_trans_g77_array (sym, block); |
| return; |
| } |
| |
| loc.nextc = NULL; |
| gfc_save_backend_locus (&loc); |
| /* loc.nextc is not set by save_backend_locus but the location routines |
| depend on it. */ |
| if (loc.nextc == NULL) |
| loc.nextc = loc.lb->line; |
| gfc_set_backend_locus (&sym->declared_at); |
| |
| /* Descriptor type. */ |
| type = TREE_TYPE (tmpdesc); |
| gcc_assert (GFC_ARRAY_TYPE_P (type)); |
| dumdesc = GFC_DECL_SAVED_DESCRIPTOR (tmpdesc); |
| if (is_classarray) |
| /* For a class array the dummy array descriptor is in the _class |
| component. */ |
| dumdesc = gfc_class_data_get (dumdesc); |
| else |
| dumdesc = build_fold_indirect_ref_loc (input_location, dumdesc); |
| as = IS_CLASS_ARRAY (sym) ? CLASS_DATA (sym)->as : sym->as; |
| gfc_start_block (&init); |
| |
| if (sym->ts.type == BT_CHARACTER |
| && VAR_P (sym->ts.u.cl->backend_decl)) |
| gfc_conv_string_length (sym->ts.u.cl, NULL, &init); |
| |
| checkparm = (as->type == AS_EXPLICIT |
| && (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS)); |
| |
| no_repack = !(GFC_DECL_PACKED_ARRAY (tmpdesc) |
| || GFC_DECL_PARTIAL_PACKED_ARRAY (tmpdesc)); |
| |
| if (GFC_DECL_PARTIAL_PACKED_ARRAY (tmpdesc)) |
| { |
| /* For non-constant shape arrays we only check if the first dimension |
| is contiguous. Repacking higher dimensions wouldn't gain us |
| anything as we still don't know the array stride. */ |
| partial = gfc_create_var (logical_type_node, "partial"); |
| TREE_USED (partial) = 1; |
| tmp = gfc_conv_descriptor_stride_get (dumdesc, gfc_rank_cst[0]); |
| tmp = fold_build2_loc (input_location, EQ_EXPR, logical_type_node, tmp, |
| gfc_index_one_node); |
| gfc_add_modify (&init, partial, tmp); |
| } |
| else |
| partial = NULL_TREE; |
| |
| /* The naming of stmt_unpacked and stmt_packed may be counter-intuitive |
| here, however I think it does the right thing. */ |
| if (no_repack) |
| { |
| /* Set the first stride. */ |
| stride = gfc_conv_descriptor_stride_get (dumdesc, gfc_rank_cst[0]); |
| stride = gfc_evaluate_now (stride, &init); |
| |
| tmp = fold_build2_loc (input_location, EQ_EXPR, logical_type_node, |
| stride, gfc_index_zero_node); |
| tmp = fold_build3_loc (input_location, COND_EXPR, gfc_array_index_type, |
| tmp, gfc_index_one_node, stride); |
| stride = GFC_TYPE_ARRAY_STRIDE (type, 0); |
| gfc_add_modify (&init, stride, tmp); |
| |
| /* Allow the user to disable array repacking. */ |
| stmt_unpacked = NULL_TREE; |
| } |
| else |
| { |
| gcc_assert (integer_onep (GFC_TYPE_ARRAY_STRIDE (type, 0))); |
| /* A library call to repack the array if necessary. */ |
| tmp = GFC_DECL_SAVED_DESCRIPTOR (tmpdesc); |
| stmt_unpacked = build_call_expr_loc (input_location, |
| gfor_fndecl_in_pack, 1, tmp); |
| |
| stride = gfc_index_one_node; |
| |
| if (warn_array_temporaries) |
| gfc_warning (OPT_Warray_temporaries, |
| "Creating array temporary at %L", &loc); |
| } |
| |
| /* This is for the case where the array data is used directly without |
| calling the repack function. */ |
| if (no_repack || partial != NULL_TREE) |
| stmt_packed = gfc_conv_descriptor_data_get (dumdesc); |
| else |
| stmt_packed = NULL_TREE; |
| |
| /* Assign the data pointer. */ |
| if (stmt_packed != NULL_TREE && stmt_unpacked != NULL_TREE) |
| { |
| /* Don't repack unknown shape arrays when the first stride is 1. */ |
| tmp = fold_build3_loc (input_location, COND_EXPR, TREE_TYPE (stmt_packed), |
| partial, stmt_packed, stmt_unpacked); |
| } |
| else |
| tmp = stmt_packed != NULL_TREE ? stmt_packed : stmt_unpacked; |
| gfc_add_modify (&init, tmpdesc, fold_convert (type, tmp)); |
| |
| offset = gfc_index_zero_node; |
| size = gfc_index_one_node; |
| |
| /* Evaluate the bounds of the array. */ |
| for (n = 0; n < as->rank; n++) |
| { |
| if (checkparm || !as->upper[n]) |
| { |
| /* Get the bounds of the actual parameter. */ |
| dubound = gfc_conv_descriptor_ubound_get (dumdesc, gfc_rank_cst[n]); |
| dlbound = gfc_conv_descriptor_lbound_get (dumdesc, gfc_rank_cst[n]); |
| } |
| else |
| { |
| dubound = NULL_TREE; |
| dlbound = NULL_TREE; |
| } |
| |
| lbound = GFC_TYPE_ARRAY_LBOUND (type, n); |
| if (!INTEGER_CST_P (lbound)) |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_type (&se, as->lower[n], |
| gfc_array_index_type); |
| gfc_add_block_to_block (&init, &se.pre); |
| gfc_add_modify (&init, lbound, se.expr); |
| } |
| |
| ubound = GFC_TYPE_ARRAY_UBOUND (type, n); |
| /* Set the desired upper bound. */ |
| if (as->upper[n]) |
| { |
| /* We know what we want the upper bound to be. */ |
| if (!INTEGER_CST_P (ubound)) |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_type (&se, as->upper[n], |
| gfc_array_index_type); |
| gfc_add_block_to_block (&init, &se.pre); |
| gfc_add_modify (&init, ubound, se.expr); |
| } |
| |
| /* Check the sizes match. */ |
| if (checkparm) |
| { |
| /* Check (ubound(a) - lbound(a) == ubound(b) - lbound(b)). */ |
| char * msg; |
| tree temp; |
| |
| temp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, ubound, lbound); |
| temp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| gfc_index_one_node, temp); |
| stride2 = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, dubound, |
| dlbound); |
| stride2 = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| gfc_index_one_node, stride2); |
| tmp = fold_build2_loc (input_location, NE_EXPR, |
| gfc_array_index_type, temp, stride2); |
| msg = xasprintf ("Dimension %d of array '%s' has extent " |
| "%%ld instead of %%ld", n+1, sym->name); |
| |
| gfc_trans_runtime_check (true, false, tmp, &init, &loc, msg, |
| fold_convert (long_integer_type_node, temp), |
| fold_convert (long_integer_type_node, stride2)); |
| |
| free (msg); |
| } |
| } |
| else |
| { |
| /* For assumed shape arrays move the upper bound by the same amount |
| as the lower bound. */ |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, dubound, dlbound); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, tmp, lbound); |
| gfc_add_modify (&init, ubound, tmp); |
| } |
| /* The offset of this dimension. offset = offset - lbound * stride. */ |
| tmp = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type, |
| lbound, stride); |
| offset = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, offset, tmp); |
| |
| /* The size of this dimension, and the stride of the next. */ |
| if (n + 1 < as->rank) |
| { |
| stride = GFC_TYPE_ARRAY_STRIDE (type, n + 1); |
| |
| if (no_repack || partial != NULL_TREE) |
| stmt_unpacked = |
| gfc_conv_descriptor_stride_get (dumdesc, gfc_rank_cst[n+1]); |
| |
| /* Figure out the stride if not a known constant. */ |
| if (!INTEGER_CST_P (stride)) |
| { |
| if (no_repack) |
| stmt_packed = NULL_TREE; |
| else |
| { |
| /* Calculate stride = size * (ubound + 1 - lbound). */ |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| gfc_index_one_node, lbound); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, ubound, tmp); |
| size = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, size, tmp); |
| stmt_packed = size; |
| } |
| |
| /* Assign the stride. */ |
| if (stmt_packed != NULL_TREE && stmt_unpacked != NULL_TREE) |
| tmp = fold_build3_loc (input_location, COND_EXPR, |
| gfc_array_index_type, partial, |
| stmt_unpacked, stmt_packed); |
| else |
| tmp = (stmt_packed != NULL_TREE) ? stmt_packed : stmt_unpacked; |
| gfc_add_modify (&init, stride, tmp); |
| } |
| } |
| else |
| { |
| stride = GFC_TYPE_ARRAY_SIZE (type); |
| |
| if (stride && !INTEGER_CST_P (stride)) |
| { |
| /* Calculate size = stride * (ubound + 1 - lbound). */ |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| gfc_index_one_node, lbound); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| ubound, tmp); |
| tmp = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, |
| GFC_TYPE_ARRAY_STRIDE (type, n), tmp); |
| gfc_add_modify (&init, stride, tmp); |
| } |
| } |
| } |
| |
| gfc_trans_array_cobounds (type, &init, sym); |
| |
| /* Set the offset. */ |
| if (VAR_P (GFC_TYPE_ARRAY_OFFSET (type))) |
| gfc_add_modify (&init, GFC_TYPE_ARRAY_OFFSET (type), offset); |
| |
| gfc_trans_vla_type_sizes (sym, &init); |
| |
| stmtInit = gfc_finish_block (&init); |
| |
| /* Only do the entry/initialization code if the arg is present. */ |
| dumdesc = GFC_DECL_SAVED_DESCRIPTOR (tmpdesc); |
| optional_arg = (sym->attr.optional |
| || (sym->ns->proc_name->attr.entry_master |
| && sym->attr.dummy)); |
| if (optional_arg) |
| { |
| tmp = gfc_conv_expr_present (sym); |
| stmtInit = build3_v (COND_EXPR, tmp, stmtInit, |
| build_empty_stmt (input_location)); |
| } |
| |
| /* Cleanup code. */ |
| if (no_repack) |
| stmtCleanup = NULL_TREE; |
| else |
| { |
| stmtblock_t cleanup; |
| gfc_start_block (&cleanup); |
| |
| if (sym->attr.intent != INTENT_IN) |
| { |
| /* Copy the data back. */ |
| tmp = build_call_expr_loc (input_location, |
| gfor_fndecl_in_unpack, 2, dumdesc, tmpdesc); |
| gfc_add_expr_to_block (&cleanup, tmp); |
| } |
| |
| /* Free the temporary. */ |
| tmp = gfc_call_free (tmpdesc); |
| gfc_add_expr_to_block (&cleanup, tmp); |
| |
| stmtCleanup = gfc_finish_block (&cleanup); |
| |
| /* Only do the cleanup if the array was repacked. */ |
| if (is_classarray) |
| /* For a class array the dummy array descriptor is in the _class |
| component. */ |
| tmp = gfc_class_data_get (dumdesc); |
| else |
| tmp = build_fold_indirect_ref_loc (input_location, dumdesc); |
| tmp = gfc_conv_descriptor_data_get (tmp); |
| tmp = fold_build2_loc (input_location, NE_EXPR, logical_type_node, |
| tmp, tmpdesc); |
| stmtCleanup = build3_v (COND_EXPR, tmp, stmtCleanup, |
| build_empty_stmt (input_location)); |
| |
| if (optional_arg) |
| { |
| tmp = gfc_conv_expr_present (sym); |
| stmtCleanup = build3_v (COND_EXPR, tmp, stmtCleanup, |
| build_empty_stmt (input_location)); |
| } |
| } |
| |
| /* We don't need to free any memory allocated by internal_pack as it will |
| be freed at the end of the function by pop_context. */ |
| gfc_add_init_cleanup (block, stmtInit, stmtCleanup); |
| |
| gfc_restore_backend_locus (&loc); |
| } |
| |
| |
| /* Calculate the overall offset, including subreferences. */ |
| static void |
| gfc_get_dataptr_offset (stmtblock_t *block, tree parm, tree desc, tree offset, |
| bool subref, gfc_expr *expr) |
| { |
| tree tmp; |
| tree field; |
| tree stride; |
| tree index; |
| gfc_ref *ref; |
| gfc_se start; |
| int n; |
| |
| /* If offset is NULL and this is not a subreferenced array, there is |
| nothing to do. */ |
| if (offset == NULL_TREE) |
| { |
| if (subref) |
| offset = gfc_index_zero_node; |
| else |
| return; |
| } |
| |
| tmp = build_array_ref (desc, offset, NULL, NULL); |
| |
| /* Offset the data pointer for pointer assignments from arrays with |
| subreferences; e.g. my_integer => my_type(:)%integer_component. */ |
| if (subref) |
| { |
| /* Go past the array reference. */ |
| for (ref = expr->ref; ref; ref = ref->next) |
| if (ref->type == REF_ARRAY && |
| ref->u.ar.type != AR_ELEMENT) |
| { |
| ref = ref->next; |
| break; |
| } |
| |
| /* Calculate the offset for each subsequent subreference. */ |
| for (; ref; ref = ref->next) |
| { |
| switch (ref->type) |
| { |
| case REF_COMPONENT: |
| field = ref->u.c.component->backend_decl; |
| gcc_assert (field && TREE_CODE (field) == FIELD_DECL); |
| tmp = fold_build3_loc (input_location, COMPONENT_REF, |
| TREE_TYPE (field), |
| tmp, field, NULL_TREE); |
| break; |
| |
| case REF_SUBSTRING: |
| gcc_assert (TREE_CODE (TREE_TYPE (tmp)) == ARRAY_TYPE); |
| gfc_init_se (&start, NULL); |
| gfc_conv_expr_type (&start, ref->u.ss.start, gfc_charlen_type_node); |
| gfc_add_block_to_block (block, &start.pre); |
| tmp = gfc_build_array_ref (tmp, start.expr, NULL); |
| break; |
| |
| case REF_ARRAY: |
| gcc_assert (TREE_CODE (TREE_TYPE (tmp)) == ARRAY_TYPE |
| && ref->u.ar.type == AR_ELEMENT); |
| |
| /* TODO - Add bounds checking. */ |
| stride = gfc_index_one_node; |
| index = gfc_index_zero_node; |
| for (n = 0; n < ref->u.ar.dimen; n++) |
| { |
| tree itmp; |
| tree jtmp; |
| |
| /* Update the index. */ |
| gfc_init_se (&start, NULL); |
| gfc_conv_expr_type (&start, ref->u.ar.start[n], gfc_array_index_type); |
| itmp = gfc_evaluate_now (start.expr, block); |
| gfc_init_se (&start, NULL); |
| gfc_conv_expr_type (&start, ref->u.ar.as->lower[n], gfc_array_index_type); |
| jtmp = gfc_evaluate_now (start.expr, block); |
| itmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, itmp, jtmp); |
| itmp = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, itmp, stride); |
| index = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, itmp, index); |
| index = gfc_evaluate_now (index, block); |
| |
| /* Update the stride. */ |
| gfc_init_se (&start, NULL); |
| gfc_conv_expr_type (&start, ref->u.ar.as->upper[n], gfc_array_index_type); |
| itmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, start.expr, |
| jtmp); |
| itmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| gfc_index_one_node, itmp); |
| stride = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, stride, itmp); |
| stride = gfc_evaluate_now (stride, block); |
| } |
| |
| /* Apply the index to obtain the array element. */ |
| tmp = gfc_build_array_ref (tmp, index, NULL); |
| break; |
| |
| default: |
| gcc_unreachable (); |
| break; |
| } |
| } |
| } |
| |
| /* Set the target data pointer. */ |
| offset = gfc_build_addr_expr (gfc_array_dataptr_type (desc), tmp); |
| gfc_conv_descriptor_data_set (block, parm, offset); |
| } |
| |
| |
| /* gfc_conv_expr_descriptor needs the string length an expression |
| so that the size of the temporary can be obtained. This is done |
| by adding up the string lengths of all the elements in the |
| expression. Function with non-constant expressions have their |
| string lengths mapped onto the actual arguments using the |
| interface mapping machinery in trans-expr.c. */ |
| static void |
| get_array_charlen (gfc_expr *expr, gfc_se *se) |
| { |
| gfc_interface_mapping mapping; |
| gfc_formal_arglist *formal; |
| gfc_actual_arglist *arg; |
| gfc_se tse; |
| |
| if (expr->ts.u.cl->length |
| && gfc_is_constant_expr (expr->ts.u.cl->length)) |
| { |
| if (!expr->ts.u.cl->backend_decl) |
| gfc_conv_string_length (expr->ts.u.cl, expr, &se->pre); |
| return; |
| } |
| |
| switch (expr->expr_type) |
| { |
| case EXPR_OP: |
| get_array_charlen (expr->value.op.op1, se); |
| |
| /* For parentheses the expression ts.u.cl is identical. */ |
| if (expr->value.op.op == INTRINSIC_PARENTHESES) |
| return; |
| |
| expr->ts.u.cl->backend_decl = |
| gfc_create_var (gfc_charlen_type_node, "sln"); |
| |
| if (expr->value.op.op2) |
| { |
| get_array_charlen (expr->value.op.op2, se); |
| |
| gcc_assert (expr->value.op.op == INTRINSIC_CONCAT); |
| |
| /* Add the string lengths and assign them to the expression |
| string length backend declaration. */ |
| gfc_add_modify (&se->pre, expr->ts.u.cl->backend_decl, |
| fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_charlen_type_node, |
| expr->value.op.op1->ts.u.cl->backend_decl, |
| expr->value.op.op2->ts.u.cl->backend_decl)); |
| } |
| else |
| gfc_add_modify (&se->pre, expr->ts.u.cl->backend_decl, |
| expr->value.op.op1->ts.u.cl->backend_decl); |
| break; |
| |
| case EXPR_FUNCTION: |
| if (expr->value.function.esym == NULL |
| || expr->ts.u.cl->length->expr_type == EXPR_CONSTANT) |
| { |
| gfc_conv_string_length (expr->ts.u.cl, expr, &se->pre); |
| break; |
| } |
| |
| /* Map expressions involving the dummy arguments onto the actual |
| argument expressions. */ |
| gfc_init_interface_mapping (&mapping); |
| formal = gfc_sym_get_dummy_args (expr->symtree->n.sym); |
| arg = expr->value.function.actual; |
| |
| /* Set se = NULL in the calls to the interface mapping, to suppress any |
| backend stuff. */ |
| for (; arg != NULL; arg = arg->next, formal = formal ? formal->next : NULL) |
| { |
| if (!arg->expr) |
| continue; |
| if (formal->sym) |
| gfc_add_interface_mapping (&mapping, formal->sym, NULL, arg->expr); |
| } |
| |
| gfc_init_se (&tse, NULL); |
| |
| /* Build the expression for the character length and convert it. */ |
| gfc_apply_interface_mapping (&mapping, &tse, expr->ts.u.cl->length); |
| |
| gfc_add_block_to_block (&se->pre, &tse.pre); |
| gfc_add_block_to_block (&se->post, &tse.post); |
| tse.expr = fold_convert (gfc_charlen_type_node, tse.expr); |
| tse.expr = fold_build2_loc (input_location, MAX_EXPR, |
| TREE_TYPE (tse.expr), tse.expr, |
| build_zero_cst (TREE_TYPE (tse.expr))); |
| expr->ts.u.cl->backend_decl = tse.expr; |
| gfc_free_interface_mapping (&mapping); |
| break; |
| |
| default: |
| gfc_conv_string_length (expr->ts.u.cl, expr, &se->pre); |
| break; |
| } |
| } |
| |
| |
| /* Helper function to check dimensions. */ |
| static bool |
| transposed_dims (gfc_ss *ss) |
| { |
| int n; |
| |
| for (n = 0; n < ss->dimen; n++) |
| if (ss->dim[n] != n) |
| return true; |
| return false; |
| } |
| |
| |
| /* Convert the last ref of a scalar coarray from an AR_ELEMENT to an |
| AR_FULL, suitable for the scalarizer. */ |
| |
| static gfc_ss * |
| walk_coarray (gfc_expr *e) |
| { |
| gfc_ss *ss; |
| |
| gcc_assert (gfc_get_corank (e) > 0); |
| |
| ss = gfc_walk_expr (e); |
| |
| /* Fix scalar coarray. */ |
| if (ss == gfc_ss_terminator) |
| { |
| gfc_ref *ref; |
| |
| ref = e->ref; |
| while (ref) |
| { |
| if (ref->type == REF_ARRAY |
| && ref->u.ar.codimen > 0) |
| break; |
| |
| ref = ref->next; |
| } |
| |
| gcc_assert (ref != NULL); |
| if (ref->u.ar.type == AR_ELEMENT) |
| ref->u.ar.type = AR_SECTION; |
| ss = gfc_reverse_ss (gfc_walk_array_ref (ss, e, ref)); |
| } |
| |
| return ss; |
| } |
| |
| |
| /* Convert an array for passing as an actual argument. Expressions and |
| vector subscripts are evaluated and stored in a temporary, which is then |
| passed. For whole arrays the descriptor is passed. For array sections |
| a modified copy of the descriptor is passed, but using the original data. |
| |
| This function is also used for array pointer assignments, and there |
| are three cases: |
| |
| - se->want_pointer && !se->direct_byref |
| EXPR is an actual argument. On exit, se->expr contains a |
| pointer to the array descriptor. |
| |
| - !se->want_pointer && !se->direct_byref |
| EXPR is an actual argument to an intrinsic function or the |
| left-hand side of a pointer assignment. On exit, se->expr |
| contains the descriptor for EXPR. |
| |
| - !se->want_pointer && se->direct_byref |
| EXPR is the right-hand side of a pointer assignment and |
| se->expr is the descriptor for the previously-evaluated |
| left-hand side. The function creates an assignment from |
| EXPR to se->expr. |
| |
| |
| The se->force_tmp flag disables the non-copying descriptor optimization |
| that is used for transpose. It may be used in cases where there is an |
| alias between the transpose argument and another argument in the same |
| function call. */ |
| |
| void |
| gfc_conv_expr_descriptor (gfc_se *se, gfc_expr *expr) |
| { |
| gfc_ss *ss; |
| gfc_ss_type ss_type; |
| gfc_ss_info *ss_info; |
| gfc_loopinfo loop; |
| gfc_array_info *info; |
| int need_tmp; |
| int n; |
| tree tmp; |
| tree desc; |
| stmtblock_t block; |
| tree start; |
| tree offset; |
| int full; |
| bool subref_array_target = false; |
| gfc_expr *arg, *ss_expr; |
| |
| if (se->want_coarray) |
| ss = walk_coarray (expr); |
| else |
| ss = gfc_walk_expr (expr); |
| |
| gcc_assert (ss != NULL); |
| gcc_assert (ss != gfc_ss_terminator); |
| |
| ss_info = ss->info; |
| ss_type = ss_info->type; |
| ss_expr = ss_info->expr; |
| |
| /* Special case: TRANSPOSE which needs no temporary. */ |
| while (expr->expr_type == EXPR_FUNCTION && expr->value.function.isym |
| && (arg = gfc_get_noncopying_intrinsic_argument (expr)) != NULL) |
| { |
| /* This is a call to transpose which has already been handled by the |
| scalarizer, so that we just need to get its argument's descriptor. */ |
| gcc_assert (expr->value.function.isym->id == GFC_ISYM_TRANSPOSE); |
| expr = expr->value.function.actual->expr; |
| } |
| |
| /* Special case things we know we can pass easily. */ |
| switch (expr->expr_type) |
| { |
| case EXPR_VARIABLE: |
| /* If we have a linear array section, we can pass it directly. |
| Otherwise we need to copy it into a temporary. */ |
| |
| gcc_assert (ss_type == GFC_SS_SECTION); |
| gcc_assert (ss_expr == expr); |
| info = &ss_info->data.array; |
| |
| /* Get the descriptor for the array. */ |
| gfc_conv_ss_descriptor (&se->pre, ss, 0); |
| desc = info->descriptor; |
| |
| subref_array_target = se->direct_byref && is_subref_array (expr); |
| need_tmp = gfc_ref_needs_temporary_p (expr->ref) |
| && !subref_array_target; |
| |
| if (se->force_tmp) |
| need_tmp = 1; |
| |
| if (need_tmp) |
| full = 0; |
| else if (GFC_ARRAY_TYPE_P (TREE_TYPE (desc))) |
| { |
| /* Create a new descriptor if the array doesn't have one. */ |
| full = 0; |
| } |
| else if (info->ref->u.ar.type == AR_FULL || se->descriptor_only) |
| full = 1; |
| else if (se->direct_byref) |
| full = 0; |
| else |
| full = gfc_full_array_ref_p (info->ref, NULL); |
| |
| if (full && !transposed_dims (ss)) |
| { |
| if (se->direct_byref && !se->byref_noassign) |
| { |
| /* Copy the descriptor for pointer assignments. */ |
| gfc_add_modify (&se->pre, se->expr, desc); |
| |
| /* Add any offsets from subreferences. */ |
| gfc_get_dataptr_offset (&se->pre, se->expr, desc, NULL_TREE, |
| subref_array_target, expr); |
| |
| /* ....and set the span field. */ |
| tmp = gfc_get_array_span (desc, expr); |
| gfc_conv_descriptor_span_set (&se->pre, se->expr, tmp); |
| } |
| else if (se->want_pointer) |
| { |
| /* We pass full arrays directly. This means that pointers and |
| allocatable arrays should also work. */ |
| se->expr = gfc_build_addr_expr (NULL_TREE, desc); |
| } |
| else |
| { |
| se->expr = desc; |
| } |
| |
| if (expr->ts.type == BT_CHARACTER) |
| se->string_length = gfc_get_expr_charlen (expr); |
| |
| gfc_free_ss_chain (ss); |
| return; |
| } |
| break; |
| |
| case EXPR_FUNCTION: |
| /* A transformational function return value will be a temporary |
| array descriptor. We still need to go through the scalarizer |
| to create the descriptor. Elemental functions are handled as |
| arbitrary expressions, i.e. copy to a temporary. */ |
| |
| if (se->direct_byref) |
| { |
| gcc_assert (ss_type == GFC_SS_FUNCTION && ss_expr == expr); |
| |
| /* For pointer assignments pass the descriptor directly. */ |
| if (se->ss == NULL) |
| se->ss = ss; |
| else |
| gcc_assert (se->ss == ss); |
| |
| if (!is_pointer_array (se->expr)) |
| { |
| tmp = gfc_get_element_type (TREE_TYPE (se->expr)); |
| tmp = fold_convert (gfc_array_index_type, |
| size_in_bytes (tmp)); |
| gfc_conv_descriptor_span_set (&se->pre, se->expr, tmp); |
| } |
| |
| se->expr = gfc_build_addr_expr (NULL_TREE, se->expr); |
| gfc_conv_expr (se, expr); |
| |
| gfc_free_ss_chain (ss); |
| return; |
| } |
| |
| if (ss_expr != expr || ss_type != GFC_SS_FUNCTION) |
| { |
| if (ss_expr != expr) |
| /* Elemental function. */ |
| gcc_assert ((expr->value.function.esym != NULL |
| && expr->value.function.esym->attr.elemental) |
| || (expr->value.function.isym != NULL |
| && expr->value.function.isym->elemental) |
| || gfc_inline_intrinsic_function_p (expr)); |
| else |
| gcc_assert (ss_type == GFC_SS_INTRINSIC); |
| |
| need_tmp = 1; |
| if (expr->ts.type == BT_CHARACTER |
| && expr->ts.u.cl->length->expr_type != EXPR_CONSTANT) |
| get_array_charlen (expr, se); |
| |
| info = NULL; |
| } |
| else |
| { |
| /* Transformational function. */ |
| info = &ss_info->data.array; |
| need_tmp = 0; |
| } |
| break; |
| |
| case EXPR_ARRAY: |
| /* Constant array constructors don't need a temporary. */ |
| if (ss_type == GFC_SS_CONSTRUCTOR |
| && expr->ts.type != BT_CHARACTER |
| && gfc_constant_array_constructor_p (expr->value.constructor)) |
| { |
| need_tmp = 0; |
| info = &ss_info->data.array; |
| } |
| else |
| { |
| need_tmp = 1; |
| info = NULL; |
| } |
| break; |
| |
| default: |
| /* Something complicated. Copy it into a temporary. */ |
| need_tmp = 1; |
| info = NULL; |
| break; |
| } |
| |
| /* If we are creating a temporary, we don't need to bother about aliases |
| anymore. */ |
| if (need_tmp) |
| se->force_tmp = 0; |
| |
| gfc_init_loopinfo (&loop); |
| |
| /* Associate the SS with the loop. */ |
| gfc_add_ss_to_loop (&loop, ss); |
| |
| /* Tell the scalarizer not to bother creating loop variables, etc. */ |
| if (!need_tmp) |
| loop.array_parameter = 1; |
| else |
| /* The right-hand side of a pointer assignment mustn't use a temporary. */ |
| gcc_assert (!se->direct_byref); |
| |
| /* Setup the scalarizing loops and bounds. */ |
| gfc_conv_ss_startstride (&loop); |
| |
| if (need_tmp) |
| { |
| if (expr->ts.type == BT_CHARACTER && !expr->ts.u.cl->backend_decl) |
| get_array_charlen (expr, se); |
| |
| /* Tell the scalarizer to make a temporary. */ |
| loop.temp_ss = gfc_get_temp_ss (gfc_typenode_for_spec (&expr->ts), |
| ((expr->ts.type == BT_CHARACTER) |
| ? expr->ts.u.cl->backend_decl |
| : NULL), |
| loop.dimen); |
| |
| se->string_length = loop.temp_ss->info->string_length; |
| gcc_assert (loop.temp_ss->dimen == loop.dimen); |
| gfc_add_ss_to_loop (&loop, loop.temp_ss); |
| } |
| |
| gfc_conv_loop_setup (&loop, & expr->where); |
| |
| if (need_tmp) |
| { |
| /* Copy into a temporary and pass that. We don't need to copy the data |
| back because expressions and vector subscripts must be INTENT_IN. */ |
| /* TODO: Optimize passing function return values. */ |
| gfc_se lse; |
| gfc_se rse; |
| bool deep_copy; |
| |
| /* Start the copying loops. */ |
| gfc_mark_ss_chain_used (loop.temp_ss, 1); |
| gfc_mark_ss_chain_used (ss, 1); |
| gfc_start_scalarized_body (&loop, &block); |
| |
| /* Copy each data element. */ |
| gfc_init_se (&lse, NULL); |
| gfc_copy_loopinfo_to_se (&lse, &loop); |
| gfc_init_se (&rse, NULL); |
| gfc_copy_loopinfo_to_se (&rse, &loop); |
| |
| lse.ss = loop.temp_ss; |
| rse.ss = ss; |
| |
| gfc_conv_scalarized_array_ref (&lse, NULL); |
| if (expr->ts.type == BT_CHARACTER) |
| { |
| gfc_conv_expr (&rse, expr); |
| if (POINTER_TYPE_P (TREE_TYPE (rse.expr))) |
| rse.expr = build_fold_indirect_ref_loc (input_location, |
| rse.expr); |
| } |
| else |
| gfc_conv_expr_val (&rse, expr); |
| |
| gfc_add_block_to_block (&block, &rse.pre); |
| gfc_add_block_to_block (&block, &lse.pre); |
| |
| lse.string_length = rse.string_length; |
| |
| deep_copy = !se->data_not_needed |
| && (expr->expr_type == EXPR_VARIABLE |
| || expr->expr_type == EXPR_ARRAY); |
| tmp = gfc_trans_scalar_assign (&lse, &rse, expr->ts, |
| deep_copy, false); |
| gfc_add_expr_to_block (&block, tmp); |
| |
| /* Finish the copying loops. */ |
| gfc_trans_scalarizing_loops (&loop, &block); |
| |
| desc = loop.temp_ss->info->data.array.descriptor; |
| } |
| else if (expr->expr_type == EXPR_FUNCTION && !transposed_dims (ss)) |
| { |
| desc = info->descriptor; |
| se->string_length = ss_info->string_length; |
| } |
| else |
| { |
| /* We pass sections without copying to a temporary. Make a new |
| descriptor and point it at the section we want. The loop variable |
| limits will be the limits of the section. |
| A function may decide to repack the array to speed up access, but |
| we're not bothered about that here. */ |
| int dim, ndim, codim; |
| tree parm; |
| tree parmtype; |
| tree stride; |
| tree from; |
| tree to; |
| tree base; |
| bool onebased = false, rank_remap; |
| |
| ndim = info->ref ? info->ref->u.ar.dimen : ss->dimen; |
| rank_remap = ss->dimen < ndim; |
| |
| if (se->want_coarray) |
| { |
| gfc_array_ref *ar = &info->ref->u.ar; |
| |
| codim = gfc_get_corank (expr); |
| for (n = 0; n < codim - 1; n++) |
| { |
| /* Make sure we are not lost somehow. */ |
| gcc_assert (ar->dimen_type[n + ndim] == DIMEN_THIS_IMAGE); |
| |
| /* Make sure the call to gfc_conv_section_startstride won't |
| generate unnecessary code to calculate stride. */ |
| gcc_assert (ar->stride[n + ndim] == NULL); |
| |
| gfc_conv_section_startstride (&loop.pre, ss, n + ndim); |
| loop.from[n + loop.dimen] = info->start[n + ndim]; |
| loop.to[n + loop.dimen] = info->end[n + ndim]; |
| } |
| |
| gcc_assert (n == codim - 1); |
| evaluate_bound (&loop.pre, info->start, ar->start, |
| info->descriptor, n + ndim, true, |
| ar->as->type == AS_DEFERRED); |
| loop.from[n + loop.dimen] = info->start[n + ndim]; |
| } |
| else |
| codim = 0; |
| |
| /* Set the string_length for a character array. */ |
| if (expr->ts.type == BT_CHARACTER) |
| se->string_length = gfc_get_expr_charlen (expr); |
| |
| /* If we have an array section or are assigning make sure that |
| the lower bound is 1. References to the full |
| array should otherwise keep the original bounds. */ |
| if ((!info->ref || info->ref->u.ar.type != AR_FULL) && !se->want_pointer) |
| for (dim = 0; dim < loop.dimen; dim++) |
| if (!integer_onep (loop.from[dim])) |
| { |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, gfc_index_one_node, |
| loop.from[dim]); |
| loop.to[dim] = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| loop.to[dim], tmp); |
| loop.from[dim] = gfc_index_one_node; |
| } |
| |
| desc = info->descriptor; |
| if (se->direct_byref && !se->byref_noassign) |
| { |
| /* For pointer assignments we fill in the destination.... */ |
| parm = se->expr; |
| parmtype = TREE_TYPE (parm); |
| |
| /* ....and set the span field. */ |
| tmp = gfc_get_array_span (desc, expr); |
| gfc_conv_descriptor_span_set (&loop.pre, parm, tmp); |
| } |
| else |
| { |
| /* Otherwise make a new one. */ |
| if (expr->ts.type == BT_CHARACTER && expr->ts.deferred) |
| parmtype = gfc_typenode_for_spec (&expr->ts); |
| else |
| parmtype = gfc_get_element_type (TREE_TYPE (desc)); |
| |
| parmtype = gfc_get_array_type_bounds (parmtype, loop.dimen, codim, |
| loop.from, loop.to, 0, |
| GFC_ARRAY_UNKNOWN, false); |
| parm = gfc_create_var (parmtype, "parm"); |
| |
| /* When expression is a class object, then add the class' handle to |
| the parm_decl. */ |
| if (expr->ts.type == BT_CLASS && expr->expr_type == EXPR_VARIABLE) |
| { |
| gfc_expr *class_expr = gfc_find_and_cut_at_last_class_ref (expr); |
| gfc_se classse; |
| |
| /* class_expr can be NULL, when no _class ref is in expr. |
| We must not fix this here with a gfc_fix_class_ref (). */ |
| if (class_expr) |
| { |
| gfc_init_se (&classse, NULL); |
| gfc_conv_expr (&classse, class_expr); |
| gfc_free_expr (class_expr); |
| |
| gcc_assert (classse.pre.head == NULL_TREE |
| && classse.post.head == NULL_TREE); |
| gfc_allocate_lang_decl (parm); |
| GFC_DECL_SAVED_DESCRIPTOR (parm) = classse.expr; |
| } |
| } |
| } |
| |
| offset = gfc_index_zero_node; |
| |
| /* The following can be somewhat confusing. We have two |
| descriptors, a new one and the original array. |
| {parm, parmtype, dim} refer to the new one. |
| {desc, type, n, loop} refer to the original, which maybe |
| a descriptorless array. |
| The bounds of the scalarization are the bounds of the section. |
| We don't have to worry about numeric overflows when calculating |
| the offsets because all elements are within the array data. */ |
| |
| /* Set the dtype. */ |
| tmp = gfc_conv_descriptor_dtype (parm); |
| gfc_add_modify (&loop.pre, tmp, gfc_get_dtype (parmtype)); |
| |
| /* Set offset for assignments to pointer only to zero if it is not |
| the full array. */ |
| if ((se->direct_byref || se->use_offset) |
| && ((info->ref && info->ref->u.ar.type != AR_FULL) |
| || (expr->expr_type == EXPR_ARRAY && se->use_offset))) |
| base = gfc_index_zero_node; |
| else if (GFC_ARRAY_TYPE_P (TREE_TYPE (desc))) |
| base = gfc_evaluate_now (gfc_conv_array_offset (desc), &loop.pre); |
| else |
| base = NULL_TREE; |
| |
| for (n = 0; n < ndim; n++) |
| { |
| stride = gfc_conv_array_stride (desc, n); |
| |
| /* Work out the offset. */ |
| if (info->ref |
| && info->ref->u.ar.dimen_type[n] == DIMEN_ELEMENT) |
| { |
| gcc_assert (info->subscript[n] |
| && info->subscript[n]->info->type == GFC_SS_SCALAR); |
| start = info->subscript[n]->info->data.scalar.value; |
| } |
| else |
| { |
| /* Evaluate and remember the start of the section. */ |
| start = info->start[n]; |
| stride = gfc_evaluate_now (stride, &loop.pre); |
| } |
| |
| tmp = gfc_conv_array_lbound (desc, n); |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, TREE_TYPE (tmp), |
| start, tmp); |
| tmp = fold_build2_loc (input_location, MULT_EXPR, TREE_TYPE (tmp), |
| tmp, stride); |
| offset = fold_build2_loc (input_location, PLUS_EXPR, TREE_TYPE (tmp), |
| offset, tmp); |
| |
| if (info->ref |
| && info->ref->u.ar.dimen_type[n] == DIMEN_ELEMENT) |
| { |
| /* For elemental dimensions, we only need the offset. */ |
| continue; |
| } |
| |
| /* Vector subscripts need copying and are handled elsewhere. */ |
| if (info->ref) |
| gcc_assert (info->ref->u.ar.dimen_type[n] == DIMEN_RANGE); |
| |
| /* look for the corresponding scalarizer dimension: dim. */ |
| for (dim = 0; dim < ndim; dim++) |
| if (ss->dim[dim] == n) |
| break; |
| |
| /* loop exited early: the DIM being looked for has been found. */ |
| gcc_assert (dim < ndim); |
| |
| /* Set the new lower bound. */ |
| from = loop.from[dim]; |
| to = loop.to[dim]; |
| |
| onebased = integer_onep (from); |
| gfc_conv_descriptor_lbound_set (&loop.pre, parm, |
| gfc_rank_cst[dim], from); |
| |
| /* Set the new upper bound. */ |
| gfc_conv_descriptor_ubound_set (&loop.pre, parm, |
| gfc_rank_cst[dim], to); |
| |
| /* Multiply the stride by the section stride to get the |
| total stride. */ |
| stride = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, |
| stride, info->stride[n]); |
| |
| if ((se->direct_byref || se->use_offset) |
| && ((info->ref && info->ref->u.ar.type != AR_FULL) |
| || (expr->expr_type == EXPR_ARRAY && se->use_offset))) |
| { |
| base = fold_build2_loc (input_location, MINUS_EXPR, |
| TREE_TYPE (base), base, stride); |
| } |
| else if (GFC_ARRAY_TYPE_P (TREE_TYPE (desc)) || se->use_offset) |
| { |
| bool toonebased; |
| tmp = gfc_conv_array_lbound (desc, n); |
| toonebased = integer_onep (tmp); |
| // lb(arr) - from (- start + 1) |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| TREE_TYPE (base), tmp, from); |
| if (onebased && toonebased) |
| { |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| TREE_TYPE (base), tmp, start); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| TREE_TYPE (base), tmp, |
| gfc_index_one_node); |
| } |
| tmp = fold_build2_loc (input_location, MULT_EXPR, |
| TREE_TYPE (base), tmp, |
| gfc_conv_array_stride (desc, n)); |
| base = fold_build2_loc (input_location, PLUS_EXPR, |
| TREE_TYPE (base), tmp, base); |
| } |
| |
| /* Store the new stride. */ |
| gfc_conv_descriptor_stride_set (&loop.pre, parm, |
| gfc_rank_cst[dim], stride); |
| } |
| |
| for (n = loop.dimen; n < loop.dimen + codim; n++) |
| { |
| from = loop.from[n]; |
| to = loop.to[n]; |
| gfc_conv_descriptor_lbound_set (&loop.pre, parm, |
| gfc_rank_cst[n], from); |
| if (n < loop.dimen + codim - 1) |
| gfc_conv_descriptor_ubound_set (&loop.pre, parm, |
| gfc_rank_cst[n], to); |
| } |
| |
| if (se->data_not_needed) |
| gfc_conv_descriptor_data_set (&loop.pre, parm, |
| gfc_index_zero_node); |
| else |
| /* Point the data pointer at the 1st element in the section. */ |
| gfc_get_dataptr_offset (&loop.pre, parm, desc, offset, |
| subref_array_target, expr); |
| |
| /* Force the offset to be -1, when the lower bound of the highest |
| dimension is one and the symbol is present and is not a |
| pointer/allocatable or associated. */ |
| if (((se->direct_byref || GFC_ARRAY_TYPE_P (TREE_TYPE (desc))) |
| && !se->data_not_needed) |
| || (se->use_offset && base != NULL_TREE)) |
| { |
| /* Set the offset depending on base. */ |
| tmp = rank_remap && !se->direct_byref ? |
| fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, base, |
| offset) |
| : base; |
| gfc_conv_descriptor_offset_set (&loop.pre, parm, tmp); |
| } |
| else if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (desc)) |
| && !se->data_not_needed |
| && (!rank_remap || se->use_offset)) |
| { |
| gfc_conv_descriptor_offset_set (&loop.pre, parm, |
| gfc_conv_descriptor_offset_get (desc)); |
| } |
| else if (onebased && (!rank_remap || se->use_offset) |
| && expr->symtree |
| && !(expr->symtree->n.sym && expr->symtree->n.sym->ts.type == BT_CLASS |
| && !CLASS_DATA (expr->symtree->n.sym)->attr.class_pointer) |
| && !expr->symtree->n.sym->attr.allocatable |
| && !expr->symtree->n.sym->attr.pointer |
| && !expr->symtree->n.sym->attr.host_assoc |
| && !expr->symtree->n.sym->attr.use_assoc) |
| { |
| /* Set the offset to -1. */ |
| mpz_t minus_one; |
| mpz_init_set_si (minus_one, -1); |
| tmp = gfc_conv_mpz_to_tree (minus_one, gfc_index_integer_kind); |
| gfc_conv_descriptor_offset_set (&loop.pre, parm, tmp); |
| } |
| else |
| { |
| /* Only the callee knows what the correct offset it, so just set |
| it to zero here. */ |
| gfc_conv_descriptor_offset_set (&loop.pre, parm, gfc_index_zero_node); |
| } |
| desc = parm; |
| } |
| |
| /* For class arrays add the class tree into the saved descriptor to |
| enable getting of _vptr and the like. */ |
| if (expr->expr_type == EXPR_VARIABLE && VAR_P (desc) |
| && IS_CLASS_ARRAY (expr->symtree->n.sym)) |
| { |
| gfc_allocate_lang_decl (desc); |
| GFC_DECL_SAVED_DESCRIPTOR (desc) = |
| DECL_LANG_SPECIFIC (expr->symtree->n.sym->backend_decl) ? |
| GFC_DECL_SAVED_DESCRIPTOR (expr->symtree->n.sym->backend_decl) |
| : expr->symtree->n.sym->backend_decl; |
| } |
| else if (expr->expr_type == EXPR_ARRAY && VAR_P (desc) |
| && IS_CLASS_ARRAY (expr)) |
| { |
| tree vtype; |
| gfc_allocate_lang_decl (desc); |
| tmp = gfc_create_var (expr->ts.u.derived->backend_decl, "class"); |
| GFC_DECL_SAVED_DESCRIPTOR (desc) = tmp; |
| vtype = gfc_class_vptr_get (tmp); |
| gfc_add_modify (&se->pre, vtype, |
| gfc_build_addr_expr (TREE_TYPE (vtype), |
| gfc_find_vtab (&expr->ts)->backend_decl)); |
| } |
| if (!se->direct_byref || se->byref_noassign) |
| { |
| /* Get a pointer to the new descriptor. */ |
| if (se->want_pointer) |
| se->expr = gfc_build_addr_expr (NULL_TREE, desc); |
| else |
| se->expr = desc; |
| } |
| |
| gfc_add_block_to_block (&se->pre, &loop.pre); |
| gfc_add_block_to_block (&se->post, &loop.post); |
| |
| /* Cleanup the scalarizer. */ |
| gfc_cleanup_loop (&loop); |
| } |
| |
| /* Helper function for gfc_conv_array_parameter if array size needs to be |
| computed. */ |
| |
| static void |
| array_parameter_size (tree desc, gfc_expr *expr, tree *size) |
| { |
| tree elem; |
| if (GFC_ARRAY_TYPE_P (TREE_TYPE (desc))) |
| *size = GFC_TYPE_ARRAY_SIZE (TREE_TYPE (desc)); |
| else if (expr->rank > 1) |
| *size = build_call_expr_loc (input_location, |
| gfor_fndecl_size0, 1, |
| gfc_build_addr_expr (NULL, desc)); |
| else |
| { |
| tree ubound = gfc_conv_descriptor_ubound_get (desc, gfc_index_zero_node); |
| tree lbound = gfc_conv_descriptor_lbound_get (desc, gfc_index_zero_node); |
| |
| *size = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, ubound, lbound); |
| *size = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type, |
| *size, gfc_index_one_node); |
| *size = fold_build2_loc (input_location, MAX_EXPR, gfc_array_index_type, |
| *size, gfc_index_zero_node); |
| } |
| elem = TYPE_SIZE_UNIT (gfc_get_element_type (TREE_TYPE (desc))); |
| *size = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type, |
| *size, fold_convert (gfc_array_index_type, elem)); |
| } |
| |
| /* Convert an array for passing as an actual parameter. */ |
| /* TODO: Optimize passing g77 arrays. */ |
| |
| void |
| gfc_conv_array_parameter (gfc_se * se, gfc_expr * expr, bool g77, |
| const gfc_symbol *fsym, const char *proc_name, |
| tree *size) |
| { |
| tree ptr; |
| tree desc; |
| tree tmp = NULL_TREE; |
| tree stmt; |
| tree parent = DECL_CONTEXT (current_function_decl); |
| bool full_array_var; |
| bool this_array_result; |
| bool contiguous; |
| bool no_pack; |
| bool array_constructor; |
| bool good_allocatable; |
| bool ultimate_ptr_comp; |
| bool ultimate_alloc_comp; |
| gfc_symbol *sym; |
| stmtblock_t block; |
| gfc_ref *ref; |
| |
| ultimate_ptr_comp = false; |
| ultimate_alloc_comp = false; |
| |
| for (ref = expr->ref; ref; ref = ref->next) |
| { |
| if (ref->next == NULL) |
| break; |
| |
| if (ref->type == REF_COMPONENT) |
| { |
| ultimate_ptr_comp = ref->u.c.component->attr.pointer; |
| ultimate_alloc_comp = ref->u.c.component->attr.allocatable; |
| } |
| } |
| |
| full_array_var = false; |
| contiguous = false; |
| |
| if (expr->expr_type == EXPR_VARIABLE && ref && !ultimate_ptr_comp) |
| full_array_var = gfc_full_array_ref_p (ref, &contiguous); |
| |
| sym = full_array_var ? expr->symtree->n.sym : NULL; |
| |
| /* The symbol should have an array specification. */ |
| gcc_assert (!sym || sym->as || ref->u.ar.as); |
| |
| if (expr->expr_type == EXPR_ARRAY && expr->ts.type == BT_CHARACTER) |
| { |
| get_array_ctor_strlen (&se->pre, expr->value.constructor, &tmp); |
| expr->ts.u.cl->backend_decl = tmp; |
| se->string_length = tmp; |
| } |
| |
| /* Is this the result of the enclosing procedure? */ |
| this_array_result = (full_array_var && sym->attr.flavor == FL_PROCEDURE); |
| if (this_array_result |
| && (sym->backend_decl != current_function_decl) |
| && (sym->backend_decl != parent)) |
| this_array_result = false; |
| |
| /* Passing address of the array if it is not pointer or assumed-shape. */ |
| if (full_array_var && g77 && !this_array_result |
| && sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS) |
| { |
| tmp = gfc_get_symbol_decl (sym); |
| |
| if (sym->ts.type == BT_CHARACTER) |
| se->string_length = sym->ts.u.cl->backend_decl; |
| |
| if (!sym->attr.pointer |
| && sym->as |
| && sym->as->type != AS_ASSUMED_SHAPE |
| && sym->as->type != AS_DEFERRED |
| && sym->as->type != AS_ASSUMED_RANK |
| && !sym->attr.allocatable) |
| { |
| /* Some variables are declared directly, others are declared as |
| pointers and allocated on the heap. */ |
| if (sym->attr.dummy || POINTER_TYPE_P (TREE_TYPE (tmp))) |
| se->expr = tmp; |
| else |
| se->expr = gfc_build_addr_expr (NULL_TREE, tmp); |
| if (size) |
| array_parameter_size (tmp, expr, size); |
| return; |
| } |
| |
| if (sym->attr.allocatable) |
| { |
| if (sym->attr.dummy || sym->attr.result) |
| { |
| gfc_conv_expr_descriptor (se, expr); |
| tmp = se->expr; |
| } |
| if (size) |
| array_parameter_size (tmp, expr, size); |
| se->expr = gfc_conv_array_data (tmp); |
| return; |
| } |
| } |
| |
| /* A convenient reduction in scope. */ |
| contiguous = g77 && !this_array_result && contiguous; |
| |
| /* There is no need to pack and unpack the array, if it is contiguous |
| and not a deferred- or assumed-shape array, or if it is simply |
| contiguous. */ |
| no_pack = ((sym && sym->as |
| && !sym->attr.pointer |
| && sym->as->type != AS_DEFERRED |
| && sym->as->type != AS_ASSUMED_RANK |
| && sym->as->type != AS_ASSUMED_SHAPE) |
| || |
| (ref && ref->u.ar.as |
| && ref->u.ar.as->type != AS_DEFERRED |
| && ref->u.ar.as->type != AS_ASSUMED_RANK |
| && ref->u.ar.as->type != AS_ASSUMED_SHAPE) |
| || |
| gfc_is_simply_contiguous (expr, false, true)); |
| |
| no_pack = contiguous && no_pack; |
| |
| /* Array constructors are always contiguous and do not need packing. */ |
| array_constructor = g77 && !this_array_result && expr->expr_type == EXPR_ARRAY; |
| |
| /* Same is true of contiguous sections from allocatable variables. */ |
| good_allocatable = contiguous |
| && expr->symtree |
| && expr->symtree->n.sym->attr.allocatable; |
| |
| /* Or ultimate allocatable components. */ |
| ultimate_alloc_comp = contiguous && ultimate_alloc_comp; |
| |
| if (no_pack || array_constructor || good_allocatable || ultimate_alloc_comp) |
| { |
| gfc_conv_expr_descriptor (se, expr); |
| /* Deallocate the allocatable components of structures that are |
| not variable. */ |
| if ((expr->ts.type == BT_DERIVED || expr->ts.type == BT_CLASS) |
| && expr->ts.u.derived->attr.alloc_comp |
| && expr->expr_type != EXPR_VARIABLE) |
| { |
| tmp = gfc_deallocate_alloc_comp (expr->ts.u.derived, se->expr, expr->rank); |
| |
| /* The components shall be deallocated before their containing entity. */ |
| gfc_prepend_expr_to_block (&se->post, tmp); |
| } |
| if (expr->ts.type == BT_CHARACTER) |
| se->string_length = expr->ts.u.cl->backend_decl; |
| if (size) |
| array_parameter_size (se->expr, expr, size); |
| se->expr = gfc_conv_array_data (se->expr); |
| return; |
| } |
| |
| if (this_array_result) |
| { |
| /* Result of the enclosing function. */ |
| gfc_conv_expr_descriptor (se, expr); |
| if (size) |
| array_parameter_size (se->expr, expr, size); |
| se->expr = gfc_build_addr_expr (NULL_TREE, se->expr); |
| |
| if (g77 && TREE_TYPE (TREE_TYPE (se->expr)) != NULL_TREE |
| && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (TREE_TYPE (se->expr)))) |
| se->expr = gfc_conv_array_data (build_fold_indirect_ref_loc (input_location, |
| se->expr)); |
| |
| return; |
| } |
| else |
| { |
| /* Every other type of array. */ |
| se->want_pointer = 1; |
| gfc_conv_expr_descriptor (se, expr); |
| |
| if (size) |
| array_parameter_size (build_fold_indirect_ref_loc (input_location, |
| se->expr), |
| expr, size); |
| } |
| |
| /* Deallocate the allocatable components of structures that are |
| not variable, for descriptorless arguments. |
| Arguments with a descriptor are handled in gfc_conv_procedure_call. */ |
| if (g77 && (expr->ts.type == BT_DERIVED || expr->ts.type == BT_CLASS) |
| && expr->ts.u.derived->attr.alloc_comp |
| && expr->expr_type != EXPR_VARIABLE) |
| { |
| tmp = build_fold_indirect_ref_loc (input_location, se->expr); |
| tmp = gfc_deallocate_alloc_comp (expr->ts.u.derived, tmp, expr->rank); |
| |
| /* The components shall be deallocated before their containing entity. */ |
| gfc_prepend_expr_to_block (&se->post, tmp); |
| } |
| |
| if (g77 || (fsym && fsym->attr.contiguous |
| && !gfc_is_simply_contiguous (expr, false, true))) |
| { |
| tree origptr = NULL_TREE; |
| |
| desc = se->expr; |
| |
| /* For contiguous arrays, save the original value of the descriptor. */ |
| if (!g77) |
| { |
| origptr = gfc_create_var (pvoid_type_node, "origptr"); |
| tmp = build_fold_indirect_ref_loc (input_location, desc); |
| tmp = gfc_conv_array_data (tmp); |
| tmp = fold_build2_loc (input_location, MODIFY_EXPR, |
| TREE_TYPE (origptr), origptr, |
| fold_convert (TREE_TYPE (origptr), tmp)); |
| gfc_add_expr_to_block (&se->pre, tmp); |
| } |
| |
| /* Repack the array. */ |
| if (warn_array_temporaries) |
| { |
| if (fsym) |
| gfc_warning (OPT_Warray_temporaries, |
| "Creating array temporary at %L for argument %qs", |
| &expr->where, fsym->name); |
| else |
| gfc_warning (OPT_Warray_temporaries, |
| "Creating array temporary at %L", &expr->where); |
| } |
| |
| ptr = build_call_expr_loc (input_location, |
| gfor_fndecl_in_pack, 1, desc); |
| |
| if (fsym && fsym->attr.optional && sym && sym->attr.optional) |
| { |
| tmp = gfc_conv_expr_present (sym); |
| ptr = build3_loc (input_location, COND_EXPR, TREE_TYPE (se->expr), |
| tmp, fold_convert (TREE_TYPE (se->expr), ptr), |
| fold_convert (TREE_TYPE (se->expr), null_pointer_node)); |
| } |
| |
| ptr = gfc_evaluate_now (ptr, &se->pre); |
| |
| /* Use the packed data for the actual argument, except for contiguous arrays, |
| where the descriptor's data component is set. */ |
| if (g77) |
| se->expr = ptr; |
| else |
| { |
| tmp = build_fold_indirect_ref_loc (input_location, desc); |
| |
| gfc_ss * ss = gfc_walk_expr (expr); |
| if (!transposed_dims (ss)) |
| gfc_conv_descriptor_data_set (&se->pre, tmp, ptr); |
| else |
| { |
| tree old_field, new_field; |
| |
| /* The original descriptor has transposed dims so we can't reuse |
| it directly; we have to create a new one. */ |
| tree old_desc = tmp; |
| tree new_desc = gfc_create_var (TREE_TYPE (old_desc), "arg_desc"); |
| |
| old_field = gfc_conv_descriptor_dtype (old_desc); |
| new_field = gfc_conv_descriptor_dtype (new_desc); |
| gfc_add_modify (&se->pre, new_field, old_field); |
| |
| old_field = gfc_conv_descriptor_offset (old_desc); |
| new_field = gfc_conv_descriptor_offset (new_desc); |
| gfc_add_modify (&se->pre, new_field, old_field); |
| |
| for (int i = 0; i < expr->rank; i++) |
| { |
| old_field = gfc_conv_descriptor_dimension (old_desc, |
| gfc_rank_cst[get_array_ref_dim_for_loop_dim (ss, i)]); |
| new_field = gfc_conv_descriptor_dimension (new_desc, |
| gfc_rank_cst[i]); |
| gfc_add_modify (&se->pre, new_field, old_field); |
| } |
| |
| if (flag_coarray == GFC_FCOARRAY_LIB |
| && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (old_desc)) |
| && GFC_TYPE_ARRAY_AKIND (TREE_TYPE (old_desc)) |
| == GFC_ARRAY_ALLOCATABLE) |
| { |
| old_field = gfc_conv_descriptor_token (old_desc); |
| new_field = gfc_conv_descriptor_token (new_desc); |
| gfc_add_modify (&se->pre, new_field, old_field); |
| } |
| |
| gfc_conv_descriptor_data_set (&se->pre, new_desc, ptr); |
| se->expr = gfc_build_addr_expr (NULL_TREE, new_desc); |
| } |
| gfc_free_ss (ss); |
| } |
| |
| if (gfc_option.rtcheck & GFC_RTCHECK_ARRAY_TEMPS) |
| { |
| char * msg; |
| |
| if (fsym && proc_name) |
| msg = xasprintf ("An array temporary was created for argument " |
| "'%s' of procedure '%s'", fsym->name, proc_name); |
| else |
| msg = xasprintf ("An array temporary was created"); |
| |
| tmp = build_fold_indirect_ref_loc (input_location, |
| desc); |
| tmp = gfc_conv_array_data (tmp); |
| tmp = fold_build2_loc (input_location, NE_EXPR, logical_type_node, |
| fold_convert (TREE_TYPE (tmp), ptr), tmp); |
| |
| if (fsym && fsym->attr.optional && sym && sym->attr.optional) |
| tmp = fold_build2_loc (input_location, TRUTH_AND_EXPR, |
| logical_type_node, |
| gfc_conv_expr_present (sym), tmp); |
| |
| gfc_trans_runtime_check (false, true, tmp, &se->pre, |
| &expr->where, msg); |
| free (msg); |
| } |
| |
| gfc_start_block (&block); |
| |
| /* Copy the data back. */ |
| if (fsym == NULL || fsym->attr.intent != INTENT_IN) |
| { |
| tmp = build_call_expr_loc (input_location, |
| gfor_fndecl_in_unpack, 2, desc, ptr); |
| gfc_add_expr_to_block (&block, tmp); |
| } |
| |
| /* Free the temporary. */ |
| tmp = gfc_call_free (ptr); |
| gfc_add_expr_to_block (&block, tmp); |
| |
| stmt = gfc_finish_block (&block); |
| |
| gfc_init_block (&block); |
| /* Only if it was repacked. This code needs to be executed before the |
| loop cleanup code. */ |
| tmp = build_fold_indirect_ref_loc (input_location, |
| desc); |
| tmp = gfc_conv_array_data (tmp); |
| tmp = fold_build2_loc (input_location, NE_EXPR, logical_type_node, |
| fold_convert (TREE_TYPE (tmp), ptr), tmp); |
| |
| if (fsym && fsym->attr.optional && sym && sym->attr.optional) |
| tmp = fold_build2_loc (input_location, TRUTH_AND_EXPR, |
| logical_type_node, |
| gfc_conv_expr_present (sym), tmp); |
| |
| tmp = build3_v (COND_EXPR, tmp, stmt, build_empty_stmt (input_location)); |
| |
| gfc_add_expr_to_block (&block, tmp); |
| gfc_add_block_to_block (&block, &se->post); |
| |
| gfc_init_block (&se->post); |
| |
| /* Reset the descriptor pointer. */ |
| if (!g77) |
| { |
| tmp = build_fold_indirect_ref_loc (input_location, desc); |
| gfc_conv_descriptor_data_set (&se->post, tmp, origptr); |
| } |
| |
| gfc_add_block_to_block (&se->post, &block); |
| } |
| } |
| |
| |
| /* This helper function calculates the size in words of a full array. */ |
| |
| tree |
| gfc_full_array_size (stmtblock_t *block, tree decl, int rank) |
| { |
| tree idx; |
| tree nelems; |
| tree tmp; |
| idx = gfc_rank_cst[rank - 1]; |
| nelems = gfc_conv_descriptor_ubound_get (decl, idx); |
| tmp = gfc_conv_descriptor_lbound_get (decl, idx); |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type, |
| nelems, tmp); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type, |
| tmp, gfc_index_one_node); |
| tmp = gfc_evaluate_now (tmp, block); |
| |
| nelems = gfc_conv_descriptor_stride_get (decl, idx); |
| tmp = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type, |
| nelems, tmp); |
| return gfc_evaluate_now (tmp, block); |
| } |
| |
| |
| /* Allocate dest to the same size as src, and copy src -> dest. |
| If no_malloc is set, only the copy is done. */ |
| |
| static tree |
| duplicate_allocatable (tree dest, tree src, tree type, int rank, |
| bool no_malloc, bool no_memcpy, tree str_sz, |
| tree add_when_allocated) |
| { |
| tree tmp; |
| tree size; |
| tree nelems; |
| tree null_cond; |
| tree null_data; |
| stmtblock_t block; |
| |
| /* If the source is null, set the destination to null. Then, |
| allocate memory to the destination. */ |
| gfc_init_block (&block); |
| |
| if (!GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (dest))) |
| { |
| gfc_add_modify (&block, dest, fold_convert (type, null_pointer_node)); |
| null_data = gfc_finish_block (&block); |
| |
| gfc_init_block (&block); |
| if (str_sz != NULL_TREE) |
| size = str_sz; |
| else |
| size = TYPE_SIZE_UNIT (TREE_TYPE (type)); |
| |
| if (!no_malloc) |
| { |
| tmp = gfc_call_malloc (&block, type, size); |
| gfc_add_modify (&block, dest, fold_convert (type, tmp)); |
| } |
| |
| if (!no_memcpy) |
| { |
| tmp = builtin_decl_explicit (BUILT_IN_MEMCPY); |
| tmp = build_call_expr_loc (input_location, tmp, 3, dest, src, |
| fold_convert (size_type_node, size)); |
| gfc_add_expr_to_block (&block, tmp); |
| } |
| } |
| else |
| { |
| gfc_conv_descriptor_data_set (&block, dest, null_pointer_node); |
| null_data = gfc_finish_block (&block); |
| |
| gfc_init_block (&block); |
| if (rank) |
| nelems = gfc_full_array_size (&block, src, rank); |
| else |
| nelems = gfc_index_one_node; |
| |
| if (str_sz != NULL_TREE) |
| tmp = fold_convert (gfc_array_index_type, str_sz); |
| else |
| tmp = fold_convert (gfc_array_index_type, |
| TYPE_SIZE_UNIT (gfc_get_element_type (type))); |
| size = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type, |
| nelems, tmp); |
| if (!no_malloc) |
| { |
| tmp = TREE_TYPE (gfc_conv_descriptor_data_get (src)); |
| tmp = gfc_call_malloc (&block, tmp, size); |
| gfc_conv_descriptor_data_set (&block, dest, tmp); |
| } |
| |
| /* We know the temporary and the value will be the same length, |
| so can use memcpy. */ |
| if (!no_memcpy) |
| { |
| tmp = builtin_decl_explicit (BUILT_IN_MEMCPY); |
| tmp = build_call_expr_loc (input_location, tmp, 3, |
| gfc_conv_descriptor_data_get (dest), |
| gfc_conv_descriptor_data_get (src), |
| fold_convert (size_type_node, size)); |
| gfc_add_expr_to_block (&block, tmp); |
| } |
| } |
| |
| gfc_add_expr_to_block (&block, add_when_allocated); |
| tmp = gfc_finish_block (&block); |
| |
| /* Null the destination if the source is null; otherwise do |
| the allocate and copy. */ |
| if (!GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (src))) |
| null_cond = src; |
| else |
| null_cond = gfc_conv_descriptor_data_get (src); |
| |
| null_cond = convert (pvoid_type_node, null_cond); |
| null_cond = fold_build2_loc (input_location, NE_EXPR, logical_type_node, |
| null_cond, null_pointer_node); |
| return build3_v (COND_EXPR, null_cond, tmp, null_data); |
| } |
| |
| |
| /* Allocate dest to the same size as src, and copy data src -> dest. */ |
| |
| tree |
| gfc_duplicate_allocatable (tree dest, tree src, tree type, int rank, |
| tree add_when_allocated) |
| { |
| return duplicate_allocatable (dest, src, type, rank, false, false, |
| NULL_TREE, add_when_allocated); |
| } |
| |
| |
| /* Copy data src -> dest. */ |
| |
| tree |
| gfc_copy_allocatable_data (tree dest, tree src, tree type, int rank) |
| { |
| return duplicate_allocatable (dest, src, type, rank, true, false, |
| NULL_TREE, NULL_TREE); |
| } |
| |
| /* Allocate dest to the same size as src, but don't copy anything. */ |
| |
| tree |
| gfc_duplicate_allocatable_nocopy (tree dest, tree src, tree type, int rank) |
| { |
| return duplicate_allocatable (dest, src, type, rank, false, true, |
| NULL_TREE, NULL_TREE); |
| } |
| |
| |
| static tree |
| duplicate_allocatable_coarray (tree dest, tree dest_tok, tree src, |
| tree type, int rank) |
| { |
| tree tmp; |
| tree size; |
| tree nelems; |
| tree null_cond; |
| tree null_data; |
| stmtblock_t block, globalblock; |
| |
| /* If the source is null, set the destination to null. Then, |
| allocate memory to the destination. */ |
| gfc_init_block (&block); |
| gfc_init_block (&globalblock); |
| |
| if (!GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (dest))) |
| { |
| gfc_se se; |
| symbol_attribute attr; |
| tree dummy_desc; |
| |
| gfc_init_se (&se, NULL); |
| gfc_clear_attr (&attr); |
| attr.allocatable = 1; |
| dummy_desc = gfc_conv_scalar_to_descriptor (&se, dest, attr); |
| gfc_add_block_to_block (&globalblock, &se.pre); |
| size = TYPE_SIZE_UNIT (TREE_TYPE (type)); |
| |
| gfc_add_modify (&block, dest, fold_convert (type, null_pointer_node)); |
| gfc_allocate_using_caf_lib (&block, dummy_desc, size, |
| gfc_build_addr_expr (NULL_TREE, dest_tok), |
| NULL_TREE, NULL_TREE, NULL_TREE, |
| GFC_CAF_COARRAY_ALLOC_REGISTER_ONLY); |
| null_data = gfc_finish_block (&block); |
| |
| gfc_init_block (&block); |
| |
| gfc_allocate_using_caf_lib (&block, dummy_desc, |
| fold_convert (size_type_node, size), |
| gfc_build_addr_expr (NULL_TREE, dest_tok), |
| NULL_TREE, NULL_TREE, NULL_TREE, |
| GFC_CAF_COARRAY_ALLOC); |
| |
| tmp = builtin_decl_explicit (BUILT_IN_MEMCPY); |
| tmp = build_call_expr_loc (input_location, tmp, 3, dest, src, |
| fold_convert (size_type_node, size)); |
| gfc_add_expr_to_block (&block, tmp); |
| } |
| else |
| { |
| /* Set the rank or unitialized memory access may be reported. */ |
| tmp = gfc_conv_descriptor_rank (dest); |
| gfc_add_modify (&globalblock, tmp, build_int_cst (TREE_TYPE (tmp), rank)); |
| |
| if (rank) |
| nelems = gfc_full_array_size (&block, src, rank); |
| else |
| nelems = integer_one_node; |
| |
| tmp = fold_convert (size_type_node, |
| TYPE_SIZE_UNIT (gfc_get_element_type (type))); |
| size = fold_build2_loc (input_location, MULT_EXPR, size_type_node, |
| fold_convert (size_type_node, nelems), tmp); |
| |
| gfc_conv_descriptor_data_set (&block, dest, null_pointer_node); |
| gfc_allocate_using_caf_lib (&block, dest, fold_convert (size_type_node, |
| size), |
| gfc_build_addr_expr (NULL_TREE, dest_tok), |
| NULL_TREE, NULL_TREE, NULL_TREE, |
| GFC_CAF_COARRAY_ALLOC_REGISTER_ONLY); |
| null_data = gfc_finish_block (&block); |
| |
| gfc_init_block (&block); |
| gfc_allocate_using_caf_lib (&block, dest, |
| fold_convert (size_type_node, size), |
| gfc_build_addr_expr (NULL_TREE, dest_tok), |
| NULL_TREE, NULL_TREE, NULL_TREE, |
| GFC_CAF_COARRAY_ALLOC); |
| |
| tmp = builtin_decl_explicit (BUILT_IN_MEMCPY); |
| tmp = build_call_expr_loc (input_location, tmp, 3, |
| gfc_conv_descriptor_data_get (dest), |
| gfc_conv_descriptor_data_get (src), |
| fold_convert (size_type_node, size)); |
| gfc_add_expr_to_block (&block, tmp); |
| } |
| |
| tmp = gfc_finish_block (&block); |
| |
| /* Null the destination if the source is null; otherwise do |
| the register and copy. */ |
| if (!GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (src))) |
| null_cond = src; |
| else |
| null_cond = gfc_conv_descriptor_data_get (src); |
| |
| null_cond = convert (pvoid_type_node, null_cond); |
| null_cond = fold_build2_loc (input_location, NE_EXPR, logical_type_node, |
| null_cond, null_pointer_node); |
| gfc_add_expr_to_block (&globalblock, build3_v (COND_EXPR, null_cond, tmp, |
| null_data)); |
| return gfc_finish_block (&globalblock); |
| } |
| |
| |
| /* Helper function to abstract whether coarray processing is enabled. */ |
| |
| static bool |
| caf_enabled (int caf_mode) |
| { |
| return (caf_mode & GFC_STRUCTURE_CAF_MODE_ENABLE_COARRAY) |
| == GFC_STRUCTURE_CAF_MODE_ENABLE_COARRAY; |
| } |
| |
| |
| /* Helper function to abstract whether coarray processing is enabled |
| and we are in a derived type coarray. */ |
| |
| static bool |
| caf_in_coarray (int caf_mode) |
| { |
| static const int pat = GFC_STRUCTURE_CAF_MODE_ENABLE_COARRAY |
| | GFC_STRUCTURE_CAF_MODE_IN_COARRAY; |
| return (caf_mode & pat) == pat; |
| } |
| |
| |
| /* Helper function to abstract whether coarray is to deallocate only. */ |
| |
| bool |
| gfc_caf_is_dealloc_only (int caf_mode) |
| { |
| return (caf_mode & GFC_STRUCTURE_CAF_MODE_DEALLOC_ONLY) |
| == GFC_STRUCTURE_CAF_MODE_DEALLOC_ONLY; |
| } |
| |
| |
| /* Recursively traverse an object of derived type, generating code to |
| deallocate, nullify or copy allocatable components. This is the work horse |
| function for the functions named in this enum. */ |
| |
| enum {DEALLOCATE_ALLOC_COMP = 1, NULLIFY_ALLOC_COMP, |
| COPY_ALLOC_COMP, COPY_ONLY_ALLOC_COMP, REASSIGN_CAF_COMP, |
| ALLOCATE_PDT_COMP, DEALLOCATE_PDT_COMP, CHECK_PDT_DUMMY}; |
| |
| static gfc_actual_arglist *pdt_param_list; |
| |
| static tree |
| structure_alloc_comps (gfc_symbol * der_type, tree decl, |
| tree dest, int rank, int purpose, int caf_mode) |
| { |
| gfc_component *c; |
| gfc_loopinfo loop; |
| stmtblock_t fnblock; |
| stmtblock_t loopbody; |
| stmtblock_t tmpblock; |
| tree decl_type; |
| tree tmp; |
| tree comp; |
| tree dcmp; |
| tree nelems; |
| tree index; |
| tree var; |
| tree cdecl; |
| tree ctype; |
| tree vref, dref; |
| tree null_cond = NULL_TREE; |
| tree add_when_allocated; |
| tree dealloc_fndecl; |
| tree caf_token; |
| gfc_symbol *vtab; |
| int caf_dereg_mode; |
| symbol_attribute *attr; |
| bool deallocate_called; |
| |
| gfc_init_block (&fnblock); |
| |
| decl_type = TREE_TYPE (decl); |
| |
| if ((POINTER_TYPE_P (decl_type)) |
| || (TREE_CODE (decl_type) == REFERENCE_TYPE && rank == 0)) |
| { |
| decl = build_fold_indirect_ref_loc (input_location, decl); |
| /* Deref dest in sync with decl, but only when it is not NULL. */ |
| if (dest) |
| dest = build_fold_indirect_ref_loc (input_location, dest); |
| |
| /* Update the decl_type because it got dereferenced. */ |
| decl_type = TREE_TYPE (decl); |
| } |
| |
| /* If this is an array of derived types with allocatable components |
| build a loop and recursively call this function. */ |
| if (TREE_CODE (decl_type) == ARRAY_TYPE |
| || (GFC_DESCRIPTOR_TYPE_P (decl_type) && rank != 0)) |
| { |
| tmp = gfc_conv_array_data (decl); |
| var = build_fold_indirect_ref_loc (input_location, tmp); |
| |
| /* Get the number of elements - 1 and set the counter. */ |
| if (GFC_DESCRIPTOR_TYPE_P (decl_type)) |
| { |
| /* Use the descriptor for an allocatable array. Since this |
| is a full array reference, we only need the descriptor |
| information from dimension = rank. */ |
| tmp = gfc_full_array_size (&fnblock, decl, rank); |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, tmp, |
| gfc_index_one_node); |
| |
| null_cond = gfc_conv_descriptor_data_get (decl); |
| null_cond = fold_build2_loc (input_location, NE_EXPR, |
| logical_type_node, null_cond, |
| build_int_cst (TREE_TYPE (null_cond), 0)); |
| } |
| else |
| { |
| /* Otherwise use the TYPE_DOMAIN information. */ |
| tmp = array_type_nelts (decl_type); |
| tmp = fold_convert (gfc_array_index_type, tmp); |
| } |
| |
| /* Remember that this is, in fact, the no. of elements - 1. */ |
| nelems = gfc_evaluate_now (tmp, &fnblock); |
| index = gfc_create_var (gfc_array_index_type, "S"); |
| |
| /* Build the body of the loop. */ |
| gfc_init_block (&loopbody); |
| |
| vref = gfc_build_array_ref (var, index, NULL); |
| |
| if ((purpose == COPY_ALLOC_COMP || purpose == COPY_ONLY_ALLOC_COMP) |
| && !caf_enabled (caf_mode)) |
| { |
| tmp = build_fold_indirect_ref_loc (input_location, |
| gfc_conv_array_data (dest)); |
| dref = gfc_build_array_ref (tmp, index, NULL); |
| tmp = structure_alloc_comps (der_type, vref, dref, rank, |
| COPY_ALLOC_COMP, 0); |
| } |
| else |
| tmp = structure_alloc_comps (der_type, vref, NULL_TREE, rank, purpose, |
| caf_mode); |
| |
| gfc_add_expr_to_block (&loopbody, tmp); |
| |
| /* Build the loop and return. */ |
| gfc_init_loopinfo (&loop); |
| loop.dimen = 1; |
| loop.from[0] = gfc_index_zero_node; |
| loop.loopvar[0] = index; |
| loop.to[0] = nelems; |
| gfc_trans_scalarizing_loops (&loop, &loopbody); |
| gfc_add_block_to_block (&fnblock, &loop.pre); |
| |
| tmp = gfc_finish_block (&fnblock); |
| /* When copying allocateable components, the above implements the |
| deep copy. Nevertheless is a deep copy only allowed, when the current |
| component is allocated, for which code will be generated in |
| gfc_duplicate_allocatable (), where the deep copy code is just added |
| into the if's body, by adding tmp (the deep copy code) as last |
| argument to gfc_duplicate_allocatable (). */ |
| if (purpose == COPY_ALLOC_COMP |
| && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (dest))) |
| tmp = gfc_duplicate_allocatable (dest, decl, decl_type, rank, |
| tmp); |
| else if (null_cond != NULL_TREE) |
| tmp = build3_v (COND_EXPR, null_cond, tmp, |
| build_empty_stmt (input_location)); |
| |
| return tmp; |
| } |
| |
| if (purpose == DEALLOCATE_ALLOC_COMP && der_type->attr.pdt_type) |
| { |
| tmp = structure_alloc_comps (der_type, decl, NULL_TREE, rank, |
| DEALLOCATE_PDT_COMP, 0); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| else if (purpose == ALLOCATE_PDT_COMP && der_type->attr.alloc_comp) |
| { |
| tmp = structure_alloc_comps (der_type, decl, NULL_TREE, rank, |
| NULLIFY_ALLOC_COMP, 0); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| |
| /* Otherwise, act on the components or recursively call self to |
| act on a chain of components. */ |
| for (c = der_type->components; c; c = c->next) |
| { |
| bool cmp_has_alloc_comps = (c->ts.type == BT_DERIVED |
| || c->ts.type == BT_CLASS) |
| && c->ts.u.derived->attr.alloc_comp; |
| bool same_type = (c->ts.type == BT_DERIVED && der_type == c->ts.u.derived) |
| || (c->ts.type == BT_CLASS && der_type == CLASS_DATA (c)->ts.u.derived); |
| |
| bool is_pdt_type = c->ts.type == BT_DERIVED |
| && c->ts.u.derived->attr.pdt_type; |
| |
| cdecl = c->backend_decl; |
| ctype = TREE_TYPE (cdecl); |
| |
| switch (purpose) |
| { |
| case DEALLOCATE_ALLOC_COMP: |
| |
| gfc_init_block (&tmpblock); |
| |
| comp = fold_build3_loc (input_location, COMPONENT_REF, ctype, |
| decl, cdecl, NULL_TREE); |
| |
| /* Shortcut to get the attributes of the component. */ |
| if (c->ts.type == BT_CLASS) |
| { |
| attr = &CLASS_DATA (c)->attr; |
| if (attr->class_pointer) |
| continue; |
| } |
| else |
| { |
| attr = &c->attr; |
| if (attr->pointer) |
| continue; |
| } |
| |
| if ((c->ts.type == BT_DERIVED && !c->attr.pointer) |
| || (c->ts.type == BT_CLASS && !CLASS_DATA (c)->attr.class_pointer)) |
| /* Call the finalizer, which will free the memory and nullify the |
| pointer of an array. */ |
| deallocate_called = gfc_add_comp_finalizer_call (&tmpblock, comp, c, |
| caf_enabled (caf_mode)) |
| && attr->dimension; |
| else |
| deallocate_called = false; |
| |
| /* Add the _class ref for classes. */ |
| if (c->ts.type == BT_CLASS && attr->allocatable) |
| comp = gfc_class_data_get (comp); |
| |
| add_when_allocated = NULL_TREE; |
| if (cmp_has_alloc_comps |
| && !c->attr.pointer && !c->attr.proc_pointer |
| && !same_type |
| && !deallocate_called) |
| { |
| /* Add checked deallocation of the components. This code is |
| obviously added because the finalizer is not trusted to free |
| all memory. */ |
| if (c->ts.type == BT_CLASS) |
| { |
| rank = CLASS_DATA (c)->as ? CLASS_DATA (c)->as->rank : 0; |
| add_when_allocated |
| = structure_alloc_comps (CLASS_DATA (c)->ts.u.derived, |
| comp, NULL_TREE, rank, purpose, |
| caf_mode); |
| } |
| else |
| { |
| rank = c->as ? c->as->rank : 0; |
| add_when_allocated = structure_alloc_comps (c->ts.u.derived, |
| comp, NULL_TREE, |
| rank, purpose, |
| caf_mode); |
| } |
| } |
| |
| if (attr->allocatable && !same_type |
| && (!attr->codimension || caf_enabled (caf_mode))) |
| { |
| /* Handle all types of components besides components of the |
| same_type as the current one, because those would create an |
| endless loop. */ |
| caf_dereg_mode |
| = (caf_in_coarray (caf_mode) || attr->codimension) |
| ? (gfc_caf_is_dealloc_only (caf_mode) |
| ? GFC_CAF_COARRAY_DEALLOCATE_ONLY |
| : GFC_CAF_COARRAY_DEREGISTER) |
| : GFC_CAF_COARRAY_NOCOARRAY; |
| |
| caf_token = NULL_TREE; |
| /* Coarray components are handled directly by |
| deallocate_with_status. */ |
| if (!attr->codimension |
| && caf_dereg_mode != GFC_CAF_COARRAY_NOCOARRAY) |
| { |
| if (c->caf_token) |
| caf_token = fold_build3_loc (input_location, COMPONENT_REF, |
| TREE_TYPE (c->caf_token), |
| decl, c->caf_token, NULL_TREE); |
| else if (attr->dimension && !attr->proc_pointer) |
| caf_token = gfc_conv_descriptor_token (comp); |
| } |
| if (attr->dimension && !attr->codimension && !attr->proc_pointer) |
| /* When this is an array but not in conjunction with a coarray |
| then add the data-ref. For coarray'ed arrays the data-ref |
| is added by deallocate_with_status. */ |
| comp = gfc_conv_descriptor_data_get (comp); |
| |
| tmp = gfc_deallocate_with_status (comp, NULL_TREE, NULL_TREE, |
| NULL_TREE, NULL_TREE, true, |
| NULL, caf_dereg_mode, |
| add_when_allocated, caf_token); |
| |
| gfc_add_expr_to_block (&tmpblock, tmp); |
| } |
| else if (attr->allocatable && !attr->codimension |
| && !deallocate_called) |
| { |
| /* Case of recursive allocatable derived types. */ |
| tree is_allocated; |
| tree ubound; |
| tree cdesc; |
| stmtblock_t dealloc_block; |
| |
| gfc_init_block (&dealloc_block); |
| if (add_when_allocated) |
| gfc_add_expr_to_block (&dealloc_block, add_when_allocated); |
| |
| /* Convert the component into a rank 1 descriptor type. */ |
| if (attr->dimension) |
| { |
| tmp = gfc_get_element_type (TREE_TYPE (comp)); |
| ubound = gfc_full_array_size (&dealloc_block, comp, |
| c->ts.type == BT_CLASS |
| ? CLASS_DATA (c)->as->rank |
| : c->as->rank); |
| } |
| else |
| { |
| tmp = TREE_TYPE (comp); |
| ubound = build_int_cst (gfc_array_index_type, 1); |
| } |
| |
| cdesc = gfc_get_array_type_bounds (tmp, 1, 0, &gfc_index_one_node, |
| &ubound, 1, |
| GFC_ARRAY_ALLOCATABLE, false); |
| |
| cdesc = gfc_create_var (cdesc, "cdesc"); |
| DECL_ARTIFICIAL (cdesc) = 1; |
| |
| gfc_add_modify (&dealloc_block, gfc_conv_descriptor_dtype (cdesc), |
| gfc_get_dtype_rank_type (1, tmp)); |
| gfc_conv_descriptor_lbound_set (&dealloc_block, cdesc, |
| gfc_index_zero_node, |
| gfc_index_one_node); |
| gfc_conv_descriptor_stride_set (&dealloc_block, cdesc, |
| gfc_index_zero_node, |
| gfc_index_one_node); |
| gfc_conv_descriptor_ubound_set (&dealloc_block, cdesc, |
| gfc_index_zero_node, ubound); |
| |
| if (attr->dimension) |
| comp = gfc_conv_descriptor_data_get (comp); |
| |
| gfc_conv_descriptor_data_set (&dealloc_block, cdesc, comp); |
| |
| /* Now call the deallocator. */ |
| vtab = gfc_find_vtab (&c->ts); |
| if (vtab->backend_decl == NULL) |
| gfc_get_symbol_decl (vtab); |
| tmp = gfc_build_addr_expr (NULL_TREE, vtab->backend_decl); |
| dealloc_fndecl = gfc_vptr_deallocate_get (tmp); |
| dealloc_fndecl = build_fold_indirect_ref_loc (input_location, |
| dealloc_fndecl); |
| tmp = build_int_cst (TREE_TYPE (comp), 0); |
| is_allocated = fold_build2_loc (input_location, NE_EXPR, |
| logical_type_node, tmp, |
| comp); |
| cdesc = gfc_build_addr_expr (NULL_TREE, cdesc); |
| |
| tmp = build_call_expr_loc (input_location, |
| dealloc_fndecl, 1, |
| cdesc); |
| gfc_add_expr_to_block (&dealloc_block, tmp); |
| |
| tmp = gfc_finish_block (&dealloc_block); |
| |
| tmp = fold_build3_loc (input_location, COND_EXPR, |
| void_type_node, is_allocated, tmp, |
| build_empty_stmt (input_location)); |
| |
| gfc_add_expr_to_block (&tmpblock, tmp); |
| } |
| else if (add_when_allocated) |
| gfc_add_expr_to_block (&tmpblock, add_when_allocated); |
| |
| if (c->ts.type == BT_CLASS && attr->allocatable |
| && (!attr->codimension || !caf_enabled (caf_mode))) |
| { |
| /* Finally, reset the vptr to the declared type vtable and, if |
| necessary reset the _len field. |
| |
| First recover the reference to the component and obtain |
| the vptr. */ |
| comp = fold_build3_loc (input_location, COMPONENT_REF, ctype, |
| decl, cdecl, NULL_TREE); |
| tmp = gfc_class_vptr_get (comp); |
| |
| if (UNLIMITED_POLY (c)) |
| { |
| /* Both vptr and _len field should be nulled. */ |
| gfc_add_modify (&tmpblock, tmp, |
| build_int_cst (TREE_TYPE (tmp), 0)); |
| tmp = gfc_class_len_get (comp); |
| gfc_add_modify (&tmpblock, tmp, |
| build_int_cst (TREE_TYPE (tmp), 0)); |
| } |
| else |
| { |
| /* Build the vtable address and set the vptr with it. */ |
| tree vtab; |
| gfc_symbol *vtable; |
| vtable = gfc_find_derived_vtab (c->ts.u.derived); |
| vtab = vtable->backend_decl; |
| if (vtab == NULL_TREE) |
| vtab = gfc_get_symbol_decl (vtable); |
| vtab = gfc_build_addr_expr (NULL, vtab); |
| vtab = fold_convert (TREE_TYPE (tmp), vtab); |
| gfc_add_modify (&tmpblock, tmp, vtab); |
| } |
| } |
| |
| /* Now add the deallocation of this component. */ |
| gfc_add_block_to_block (&fnblock, &tmpblock); |
| break; |
| |
| case NULLIFY_ALLOC_COMP: |
| /* Nullify |
| - allocatable components (regular or in class) |
| - components that have allocatable components |
| - pointer components when in a coarray. |
| Skip everything else especially proc_pointers, which may come |
| coupled with the regular pointer attribute. */ |
| if (c->attr.proc_pointer |
| || !(c->attr.allocatable || (c->ts.type == BT_CLASS |
| && CLASS_DATA (c)->attr.allocatable) |
| || (cmp_has_alloc_comps |
| && ((c->ts.type == BT_DERIVED && !c->attr.pointer) |
| || (c->ts.type == BT_CLASS |
| && !CLASS_DATA (c)->attr.class_pointer))) |
| || (caf_in_coarray (caf_mode) && c->attr.pointer))) |
| continue; |
| |
| /* Process class components first, because they always have the |
| pointer-attribute set which would be caught wrong else. */ |
| if (c->ts.type == BT_CLASS |
| && (CLASS_DATA (c)->attr.allocatable |
| || CLASS_DATA (c)->attr.class_pointer)) |
| { |
| /* Allocatable CLASS components. */ |
| comp = fold_build3_loc (input_location, COMPONENT_REF, ctype, |
| decl, cdecl, NULL_TREE); |
| |
| comp = gfc_class_data_get (comp); |
| if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (comp))) |
| gfc_conv_descriptor_data_set (&fnblock, comp, |
| null_pointer_node); |
| else |
| { |
| tmp = fold_build2_loc (input_location, MODIFY_EXPR, |
| void_type_node, comp, |
| build_int_cst (TREE_TYPE (comp), 0)); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| cmp_has_alloc_comps = false; |
| } |
| /* Coarrays need the component to be nulled before the api-call |
| is made. */ |
| else if (c->attr.pointer || c->attr.allocatable) |
| { |
| comp = fold_build3_loc (input_location, COMPONENT_REF, ctype, |
| decl, cdecl, NULL_TREE); |
| if (c->attr.dimension || c->attr.codimension) |
| gfc_conv_descriptor_data_set (&fnblock, comp, |
| null_pointer_node); |
| else |
| gfc_add_modify (&fnblock, comp, |
| build_int_cst (TREE_TYPE (comp), 0)); |
| if (gfc_deferred_strlen (c, &comp)) |
| { |
| comp = fold_build3_loc (input_location, COMPONENT_REF, |
| TREE_TYPE (comp), |
| decl, comp, NULL_TREE); |
| tmp = fold_build2_loc (input_location, MODIFY_EXPR, |
| TREE_TYPE (comp), comp, |
| build_int_cst (TREE_TYPE (comp), 0)); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| cmp_has_alloc_comps = false; |
| } |
| |
| if (flag_coarray == GFC_FCOARRAY_LIB && caf_in_coarray (caf_mode)) |
| { |
| /* Register a component of a derived type coarray with the |
| coarray library. Do not register ultimate component |
| coarrays here. They are treated like regular coarrays and |
| are either allocated on all images or on none. */ |
| tree token; |
| |
| comp = fold_build3_loc (input_location, COMPONENT_REF, ctype, |
| decl, cdecl, NULL_TREE); |
| if (c->attr.dimension) |
| { |
| /* Set the dtype, because caf_register needs it. */ |
| gfc_add_modify (&fnblock, gfc_conv_descriptor_dtype (comp), |
| gfc_get_dtype (TREE_TYPE (comp))); |
| tmp = fold_build3_loc (input_location, COMPONENT_REF, ctype, |
| decl, cdecl, NULL_TREE); |
| token = gfc_conv_descriptor_token (tmp); |
| } |
| else |
| { |
| gfc_se se; |
| |
| gfc_init_se (&se, NULL); |
| token = fold_build3_loc (input_location, COMPONENT_REF, |
| pvoid_type_node, decl, c->caf_token, |
| NULL_TREE); |
| comp = gfc_conv_scalar_to_descriptor (&se, comp, |
| c->ts.type == BT_CLASS |
| ? CLASS_DATA (c)->attr |
| : c->attr); |
| gfc_add_block_to_block (&fnblock, &se.pre); |
| } |
| |
| gfc_allocate_using_caf_lib (&fnblock, comp, size_zero_node, |
| gfc_build_addr_expr (NULL_TREE, |
| token), |
| NULL_TREE, NULL_TREE, NULL_TREE, |
| GFC_CAF_COARRAY_ALLOC_REGISTER_ONLY); |
| } |
| |
| if (cmp_has_alloc_comps) |
| { |
| comp = fold_build3_loc (input_location, COMPONENT_REF, ctype, |
| decl, cdecl, NULL_TREE); |
| rank = c->as ? c->as->rank : 0; |
| tmp = structure_alloc_comps (c->ts.u.derived, comp, NULL_TREE, |
| rank, purpose, caf_mode); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| break; |
| |
| case REASSIGN_CAF_COMP: |
| if (caf_enabled (caf_mode) |
| && (c->attr.codimension |
| || (c->ts.type == BT_CLASS |
| && (CLASS_DATA (c)->attr.coarray_comp |
| || caf_in_coarray (caf_mode))) |
| || (c->ts.type == BT_DERIVED |
| && (c->ts.u.derived->attr.coarray_comp |
| || caf_in_coarray (caf_mode)))) |
| && !same_type) |
| { |
| comp = fold_build3_loc (input_location, COMPONENT_REF, ctype, |
| decl, cdecl, NULL_TREE); |
| dcmp = fold_build3_loc (input_location, COMPONENT_REF, ctype, |
| dest, cdecl, NULL_TREE); |
| |
| if (c->attr.codimension) |
| { |
| if (c->ts.type == BT_CLASS) |
| { |
| comp = gfc_class_data_get (comp); |
| dcmp = gfc_class_data_get (dcmp); |
| } |
| gfc_conv_descriptor_data_set (&fnblock, dcmp, |
| gfc_conv_descriptor_data_get (comp)); |
| } |
| else |
| { |
| tmp = structure_alloc_comps (c->ts.u.derived, comp, dcmp, |
| rank, purpose, caf_mode |
| | GFC_STRUCTURE_CAF_MODE_IN_COARRAY); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| } |
| break; |
| |
| case COPY_ALLOC_COMP: |
| if (c->attr.pointer || c->attr.proc_pointer) |
| continue; |
| |
| /* We need source and destination components. */ |
| comp = fold_build3_loc (input_location, COMPONENT_REF, ctype, decl, |
| cdecl, NULL_TREE); |
| dcmp = fold_build3_loc (input_location, COMPONENT_REF, ctype, dest, |
| cdecl, NULL_TREE); |
| dcmp = fold_convert (TREE_TYPE (comp), dcmp); |
| |
| if (c->ts.type == BT_CLASS && CLASS_DATA (c)->attr.allocatable) |
| { |
| tree ftn_tree; |
| tree size; |
| tree dst_data; |
| tree src_data; |
| tree null_data; |
| |
| dst_data = gfc_class_data_get (dcmp); |
| src_data = gfc_class_data_get (comp); |
| size = fold_convert (size_type_node, |
| gfc_class_vtab_size_get (comp)); |
| |
| if (CLASS_DATA (c)->attr.dimension) |
| { |
| nelems = gfc_conv_descriptor_size (src_data, |
| CLASS_DATA (c)->as->rank); |
| size = fold_build2_loc (input_location, MULT_EXPR, |
| size_type_node, size, |
| fold_convert (size_type_node, |
| nelems)); |
| } |
| else |
| nelems = build_int_cst (size_type_node, 1); |
| |
| if (CLASS_DATA (c)->attr.dimension |
| || CLASS_DATA (c)->attr.codimension) |
| { |
| src_data = gfc_conv_descriptor_data_get (src_data); |
| dst_data = gfc_conv_descriptor_data_get (dst_data); |
| } |
| |
| gfc_init_block (&tmpblock); |
| |
| gfc_add_modify (&tmpblock, gfc_class_vptr_get (dcmp), |
| gfc_class_vptr_get (comp)); |
| |
| /* Copy the unlimited '_len' field. If it is greater than zero |
| (ie. a character(_len)), multiply it by size and use this |
| for the malloc call. */ |
| if (UNLIMITED_POLY (c)) |
| { |
| tree ctmp; |
| gfc_add_modify (&tmpblock, gfc_class_len_get (dcmp), |
| gfc_class_len_get (comp)); |
| |
| size = gfc_evaluate_now (size, &tmpblock); |
| tmp = gfc_class_len_get (comp); |
| ctmp = fold_build2_loc (input_location, MULT_EXPR, |
| size_type_node, size, |
| fold_convert (size_type_node, tmp)); |
| tmp = fold_build2_loc (input_location, GT_EXPR, |
| logical_type_node, tmp, |
| build_zero_cst (TREE_TYPE (tmp))); |
| size = fold_build3_loc (input_location, COND_EXPR, |
| size_type_node, tmp, ctmp, size); |
| size = gfc_evaluate_now (size, &tmpblock); |
| } |
| |
| /* Coarray component have to have the same allocation status and |
| shape/type-parameter/effective-type on the LHS and RHS of an |
| intrinsic assignment. Hence, we did not deallocated them - and |
| do not allocate them here. */ |
| if (!CLASS_DATA (c)->attr.codimension) |
| { |
| ftn_tree = builtin_decl_explicit (BUILT_IN_MALLOC); |
| tmp = build_call_expr_loc (input_location, ftn_tree, 1, size); |
| gfc_add_modify (&tmpblock, dst_data, |
| fold_convert (TREE_TYPE (dst_data), tmp)); |
| } |
| |
| tmp = gfc_copy_class_to_class (comp, dcmp, nelems, |
| UNLIMITED_POLY (c)); |
| gfc_add_expr_to_block (&tmpblock, tmp); |
| tmp = gfc_finish_block (&tmpblock); |
| |
| gfc_init_block (&tmpblock); |
| gfc_add_modify (&tmpblock, dst_data, |
| fold_convert (TREE_TYPE (dst_data), |
| null_pointer_node)); |
| null_data = gfc_finish_block (&tmpblock); |
| |
| null_cond = fold_build2_loc (input_location, NE_EXPR, |
| logical_type_node, src_data, |
| null_pointer_node); |
| |
| gfc_add_expr_to_block (&fnblock, build3_v (COND_EXPR, null_cond, |
| tmp, null_data)); |
| continue; |
| } |
| |
| /* To implement guarded deep copy, i.e., deep copy only allocatable |
| components that are really allocated, the deep copy code has to |
| be generated first and then added to the if-block in |
| gfc_duplicate_allocatable (). */ |
| if (cmp_has_alloc_comps && !c->attr.proc_pointer && !same_type) |
| { |
| rank = c->as ? c->as->rank : 0; |
| tmp = fold_convert (TREE_TYPE (dcmp), comp); |
| gfc_add_modify (&fnblock, dcmp, tmp); |
| add_when_allocated = structure_alloc_comps (c->ts.u.derived, |
| comp, dcmp, |
| rank, purpose, |
| caf_mode); |
| } |
| else |
| add_when_allocated = NULL_TREE; |
| |
| if (gfc_deferred_strlen (c, &tmp)) |
| { |
| tree len, size; |
| len = tmp; |
| tmp = fold_build3_loc (input_location, COMPONENT_REF, |
| TREE_TYPE (len), |
| decl, len, NULL_TREE); |
| len = fold_build3_loc (input_location, COMPONENT_REF, |
| TREE_TYPE (len), |
| dest, len, NULL_TREE); |
| tmp = fold_build2_loc (input_location, MODIFY_EXPR, |
| TREE_TYPE (len), len, tmp); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| size = size_of_string_in_bytes (c->ts.kind, len); |
| /* This component can not have allocatable components, |
| therefore add_when_allocated of duplicate_allocatable () |
| is always NULL. */ |
| tmp = duplicate_allocatable (dcmp, comp, ctype, rank, |
| false, false, size, NULL_TREE); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| else if (c->attr.pdt_array) |
| { |
| tmp = duplicate_allocatable (dcmp, comp, ctype, |
| c->as ? c->as->rank : 0, |
| false, false, NULL_TREE, NULL_TREE); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| else if ((c->attr.allocatable) |
| && !c->attr.proc_pointer && !same_type |
| && (!(cmp_has_alloc_comps && c->as) || c->attr.codimension |
| || caf_in_coarray (caf_mode))) |
| { |
| rank = c->as ? c->as->rank : 0; |
| if (c->attr.codimension) |
| tmp = gfc_copy_allocatable_data (dcmp, comp, ctype, rank); |
| else if (flag_coarray == GFC_FCOARRAY_LIB |
| && caf_in_coarray (caf_mode)) |
| { |
| tree dst_tok = c->as ? gfc_conv_descriptor_token (dcmp) |
| : fold_build3_loc (input_location, |
| COMPONENT_REF, |
| pvoid_type_node, dest, |
| c->caf_token, |
| NULL_TREE); |
| tmp = duplicate_allocatable_coarray (dcmp, dst_tok, comp, |
| ctype, rank); |
| } |
| else |
| tmp = gfc_duplicate_allocatable (dcmp, comp, ctype, rank, |
| add_when_allocated); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| else |
| if (cmp_has_alloc_comps || is_pdt_type) |
| gfc_add_expr_to_block (&fnblock, add_when_allocated); |
| |
| break; |
| |
| case ALLOCATE_PDT_COMP: |
| |
| comp = fold_build3_loc (input_location, COMPONENT_REF, ctype, |
| decl, cdecl, NULL_TREE); |
| |
| /* Set the PDT KIND and LEN fields. */ |
| if (c->attr.pdt_kind || c->attr.pdt_len) |
| { |
| gfc_se tse; |
| gfc_expr *c_expr = NULL; |
| gfc_actual_arglist *param = pdt_param_list; |
| gfc_init_se (&tse, NULL); |
| for (; param; param = param->next) |
| if (param->name && !strcmp (c->name, param->name)) |
| c_expr = param->expr; |
| |
| if (!c_expr) |
| c_expr = c->initializer; |
| |
| if (c_expr) |
| { |
| gfc_conv_expr_type (&tse, c_expr, TREE_TYPE (comp)); |
| gfc_add_modify (&fnblock, comp, tse.expr); |
| } |
| } |
| |
| if (c->attr.pdt_string) |
| { |
| gfc_se tse; |
| gfc_init_se (&tse, NULL); |
| tree strlen = NULL_TREE; |
| gfc_expr *e = gfc_copy_expr (c->ts.u.cl->length); |
| /* Convert the parameterized string length to its value. The |
| string length is stored in a hidden field in the same way as |
| deferred string lengths. */ |
| gfc_insert_parameter_exprs (e, pdt_param_list); |
| if (gfc_deferred_strlen (c, &strlen) && strlen != NULL_TREE) |
| { |
| gfc_conv_expr_type (&tse, e, |
| TREE_TYPE (strlen)); |
| strlen = fold_build3_loc (input_location, COMPONENT_REF, |
| TREE_TYPE (strlen), |
| decl, strlen, NULL_TREE); |
| gfc_add_modify (&fnblock, strlen, tse.expr); |
| c->ts.u.cl->backend_decl = strlen; |
| } |
| gfc_free_expr (e); |
| |
| /* Scalar parameterized strings can be allocated now. */ |
| if (!c->as) |
| { |
| tmp = fold_convert (gfc_array_index_type, strlen); |
| tmp = size_of_string_in_bytes (c->ts.kind, tmp); |
| tmp = gfc_evaluate_now (tmp, &fnblock); |
| tmp = gfc_call_malloc (&fnblock, TREE_TYPE (comp), tmp); |
| gfc_add_modify (&fnblock, comp, tmp); |
| } |
| } |
| |
| /* Allocate parameterized arrays of parameterized derived types. */ |
| if (!(c->attr.pdt_array && c->as && c->as->type == AS_EXPLICIT) |
| && !((c->ts.type == BT_DERIVED || c->ts.type == BT_CLASS) |
| && (c->ts.u.derived && c->ts.u.derived->attr.pdt_type))) |
| continue; |
| |
| if (c->ts.type == BT_CLASS) |
| comp = gfc_class_data_get (comp); |
| |
| if (c->attr.pdt_array) |
| { |
| gfc_se tse; |
| int i; |
| tree size = gfc_index_one_node; |
| tree offset = gfc_index_zero_node; |
| tree lower, upper; |
| gfc_expr *e; |
| |
| /* This chunk takes the expressions for 'lower' and 'upper' |
| in the arrayspec and substitutes in the expressions for |
| the parameters from 'pdt_param_list'. The descriptor |
| fields can then be filled from the values so obtained. */ |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (comp))); |
| for (i = 0; i < c->as->rank; i++) |
| { |
| gfc_init_se (&tse, NULL); |
| e = gfc_copy_expr (c->as->lower[i]); |
| gfc_insert_parameter_exprs (e, pdt_param_list); |
| gfc_conv_expr_type (&tse, e, gfc_array_index_type); |
| gfc_free_expr (e); |
| lower = tse.expr; |
| gfc_conv_descriptor_lbound_set (&fnblock, comp, |
| gfc_rank_cst[i], |
| lower); |
| e = gfc_copy_expr (c->as->upper[i]); |
| gfc_insert_parameter_exprs (e, pdt_param_list); |
| gfc_conv_expr_type (&tse, e, gfc_array_index_type); |
| gfc_free_expr (e); |
| upper = tse.expr; |
| gfc_conv_descriptor_ubound_set (&fnblock, comp, |
| gfc_rank_cst[i], |
| upper); |
| gfc_conv_descriptor_stride_set (&fnblock, comp, |
| gfc_rank_cst[i], |
| size); |
| size = gfc_evaluate_now (size, &fnblock); |
| offset = fold_build2_loc (input_location, |
| MINUS_EXPR, |
| gfc_array_index_type, |
| offset, size); |
| offset = gfc_evaluate_now (offset, &fnblock); |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| upper, lower); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| tmp, gfc_index_one_node); |
| size = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, size, tmp); |
| } |
| gfc_conv_descriptor_offset_set (&fnblock, comp, offset); |
| if (c->ts.type == BT_CLASS) |
| { |
| tmp = gfc_get_vptr_from_expr (comp); |
| if (POINTER_TYPE_P (TREE_TYPE (tmp))) |
| tmp = build_fold_indirect_ref_loc (input_location, tmp); |
| tmp = gfc_vptr_size_get (tmp); |
| } |
| else |
| tmp = TYPE_SIZE_UNIT (gfc_get_element_type (ctype)); |
| tmp = fold_convert (gfc_array_index_type, tmp); |
| size = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, size, tmp); |
| size = gfc_evaluate_now (size, &fnblock); |
| tmp = gfc_call_malloc (&fnblock, NULL, size); |
| gfc_conv_descriptor_data_set (&fnblock, comp, tmp); |
| tmp = gfc_conv_descriptor_dtype (comp); |
| gfc_add_modify (&fnblock, tmp, gfc_get_dtype (ctype)); |
| |
| if (c->initializer && c->initializer->rank) |
| { |
| gfc_init_se (&tse, NULL); |
| e = gfc_copy_expr (c->initializer); |
| gfc_insert_parameter_exprs (e, pdt_param_list); |
| gfc_conv_expr_descriptor (&tse, e); |
| gfc_add_block_to_block (&fnblock, &tse.pre); |
| gfc_free_expr (e); |
| tmp = builtin_decl_explicit (BUILT_IN_MEMCPY); |
| tmp = build_call_expr_loc (input_location, tmp, 3, |
| gfc_conv_descriptor_data_get (comp), |
| gfc_conv_descriptor_data_get (tse.expr), |
| fold_convert (size_type_node, size)); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| gfc_add_block_to_block (&fnblock, &tse.post); |
| } |
| } |
| |
| /* Recurse in to PDT components. */ |
| if ((c->ts.type == BT_DERIVED || c->ts.type == BT_CLASS) |
| && c->ts.u.derived && c->ts.u.derived->attr.pdt_type |
| && !(c->attr.pointer || c->attr.allocatable)) |
| { |
| bool is_deferred = false; |
| gfc_actual_arglist *tail = c->param_list; |
| |
| for (; tail; tail = tail->next) |
| if (!tail->expr) |
| is_deferred = true; |
| |
| tail = is_deferred ? pdt_param_list : c->param_list; |
| tmp = gfc_allocate_pdt_comp (c->ts.u.derived, comp, |
| c->as ? c->as->rank : 0, |
| tail); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| |
| break; |
| |
| case DEALLOCATE_PDT_COMP: |
| /* Deallocate array or parameterized string length components |
| of parameterized derived types. */ |
| if (!(c->attr.pdt_array && c->as && c->as->type == AS_EXPLICIT) |
| && !c->attr.pdt_string |
| && !((c->ts.type == BT_DERIVED || c->ts.type == BT_CLASS) |
| && (c->ts.u.derived && c->ts.u.derived->attr.pdt_type))) |
| continue; |
| |
| comp = fold_build3_loc (input_location, COMPONENT_REF, ctype, |
| decl, cdecl, NULL_TREE); |
| if (c->ts.type == BT_CLASS) |
| comp = gfc_class_data_get (comp); |
| |
| /* Recurse in to PDT components. */ |
| if ((c->ts.type == BT_DERIVED || c->ts.type == BT_CLASS) |
| && c->ts.u.derived && c->ts.u.derived->attr.pdt_type |
| && (!c->attr.pointer && !c->attr.allocatable)) |
| { |
| tmp = gfc_deallocate_pdt_comp (c->ts.u.derived, comp, |
| c->as ? c->as->rank : 0); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| |
| if (c->attr.pdt_array) |
| { |
| tmp = gfc_conv_descriptor_data_get (comp); |
| null_cond = fold_build2_loc (input_location, NE_EXPR, |
| logical_type_node, tmp, |
| build_int_cst (TREE_TYPE (tmp), 0)); |
| tmp = gfc_call_free (tmp); |
| tmp = build3_v (COND_EXPR, null_cond, tmp, |
| build_empty_stmt (input_location)); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| gfc_conv_descriptor_data_set (&fnblock, comp, null_pointer_node); |
| } |
| else if (c->attr.pdt_string) |
| { |
| null_cond = fold_build2_loc (input_location, NE_EXPR, |
| logical_type_node, comp, |
| build_int_cst (TREE_TYPE (comp), 0)); |
| tmp = gfc_call_free (comp); |
| tmp = build3_v (COND_EXPR, null_cond, tmp, |
| build_empty_stmt (input_location)); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| tmp = fold_convert (TREE_TYPE (comp), null_pointer_node); |
| gfc_add_modify (&fnblock, comp, tmp); |
| } |
| |
| break; |
| |
| case CHECK_PDT_DUMMY: |
| |
| comp = fold_build3_loc (input_location, COMPONENT_REF, ctype, |
| decl, cdecl, NULL_TREE); |
| if (c->ts.type == BT_CLASS) |
| comp = gfc_class_data_get (comp); |
| |
| /* Recurse in to PDT components. */ |
| if ((c->ts.type == BT_DERIVED || c->ts.type == BT_CLASS) |
| && c->ts.u.derived && c->ts.u.derived->attr.pdt_type) |
| { |
| tmp = gfc_check_pdt_dummy (c->ts.u.derived, comp, |
| c->as ? c->as->rank : 0, |
| pdt_param_list); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| |
| if (!c->attr.pdt_len) |
| continue; |
| else |
| { |
| gfc_se tse; |
| gfc_expr *c_expr = NULL; |
| gfc_actual_arglist *param = pdt_param_list; |
| |
| gfc_init_se (&tse, NULL); |
| for (; param; param = param->next) |
| if (!strcmp (c->name, param->name) |
| && param->spec_type == SPEC_EXPLICIT) |
| c_expr = param->expr; |
| |
| if (c_expr) |
| { |
| tree error, cond, cname; |
| gfc_conv_expr_type (&tse, c_expr, TREE_TYPE (comp)); |
| cond = fold_build2_loc (input_location, NE_EXPR, |
| logical_type_node, |
| comp, tse.expr); |
| cname = gfc_build_cstring_const (c->name); |
| cname = gfc_build_addr_expr (pchar_type_node, cname); |
| error = gfc_trans_runtime_error (true, NULL, |
| "The value of the PDT LEN " |
| "parameter '%s' does not " |
| "agree with that in the " |
| "dummy declaration", |
| cname); |
| tmp = fold_build3_loc (input_location, COND_EXPR, |
| void_type_node, cond, error, |
| build_empty_stmt (input_location)); |
| gfc_add_expr_to_block (&fnblock, tmp); |
| } |
| } |
| break; |
| |
| default: |
| gcc_unreachable (); |
| break; |
| } |
| } |
| |
| return gfc_finish_block (&fnblock); |
| } |
| |
| /* Recursively traverse an object of derived type, generating code to |
| nullify allocatable components. */ |
| |
| tree |
| gfc_nullify_alloc_comp (gfc_symbol * der_type, tree decl, int rank, |
| int caf_mode) |
| { |
| return structure_alloc_comps (der_type, decl, NULL_TREE, rank, |
| NULLIFY_ALLOC_COMP, |
| GFC_STRUCTURE_CAF_MODE_ENABLE_COARRAY | caf_mode); |
| } |
| |
| |
| /* Recursively traverse an object of derived type, generating code to |
| deallocate allocatable components. */ |
| |
| tree |
| gfc_deallocate_alloc_comp (gfc_symbol * der_type, tree decl, int rank, |
| int caf_mode) |
| { |
| return structure_alloc_comps (der_type, decl, NULL_TREE, rank, |
| DEALLOCATE_ALLOC_COMP, |
| GFC_STRUCTURE_CAF_MODE_ENABLE_COARRAY | caf_mode); |
| } |
| |
| |
| /* Recursively traverse an object of derived type, generating code to |
| deallocate allocatable components. But do not deallocate coarrays. |
| To be used for intrinsic assignment, which may not change the allocation |
| status of coarrays. */ |
| |
| tree |
| gfc_deallocate_alloc_comp_no_caf (gfc_symbol * der_type, tree decl, int rank) |
| { |
| return structure_alloc_comps (der_type, decl, NULL_TREE, rank, |
| DEALLOCATE_ALLOC_COMP, 0); |
| } |
| |
| |
| tree |
| gfc_reassign_alloc_comp_caf (gfc_symbol *der_type, tree decl, tree dest) |
| { |
| return structure_alloc_comps (der_type, decl, dest, 0, REASSIGN_CAF_COMP, |
| GFC_STRUCTURE_CAF_MODE_ENABLE_COARRAY); |
| } |
| |
| |
| /* Recursively traverse an object of derived type, generating code to |
| copy it and its allocatable components. */ |
| |
| tree |
| gfc_copy_alloc_comp (gfc_symbol * der_type, tree decl, tree dest, int rank, |
| int caf_mode) |
| { |
| return structure_alloc_comps (der_type, decl, dest, rank, COPY_ALLOC_COMP, |
| caf_mode); |
| } |
| |
| |
| /* Recursively traverse an object of derived type, generating code to |
| copy only its allocatable components. */ |
| |
| tree |
| gfc_copy_only_alloc_comp (gfc_symbol * der_type, tree decl, tree dest, int rank) |
| { |
| return structure_alloc_comps (der_type, decl, dest, rank, |
| COPY_ONLY_ALLOC_COMP, 0); |
| } |
| |
| |
| /* Recursively traverse an object of paramterized derived type, generating |
| code to allocate parameterized components. */ |
| |
| tree |
| gfc_allocate_pdt_comp (gfc_symbol * der_type, tree decl, int rank, |
| gfc_actual_arglist *param_list) |
| { |
| tree res; |
| gfc_actual_arglist *old_param_list = pdt_param_list; |
| pdt_param_list = param_list; |
| res = structure_alloc_comps (der_type, decl, NULL_TREE, rank, |
| ALLOCATE_PDT_COMP, 0); |
| pdt_param_list = old_param_list; |
| return res; |
| } |
| |
| /* Recursively traverse an object of paramterized derived type, generating |
| code to deallocate parameterized components. */ |
| |
| tree |
| gfc_deallocate_pdt_comp (gfc_symbol * der_type, tree decl, int rank) |
| { |
| return structure_alloc_comps (der_type, decl, NULL_TREE, rank, |
| DEALLOCATE_PDT_COMP, 0); |
| } |
| |
| |
| /* Recursively traverse a dummy of paramterized derived type to check the |
| values of LEN parameters. */ |
| |
| tree |
| gfc_check_pdt_dummy (gfc_symbol * der_type, tree decl, int rank, |
| gfc_actual_arglist *param_list) |
| { |
| tree res; |
| gfc_actual_arglist *old_param_list = pdt_param_list; |
| pdt_param_list = param_list; |
| res = structure_alloc_comps (der_type, decl, NULL_TREE, rank, |
| CHECK_PDT_DUMMY, 0); |
| pdt_param_list = old_param_list; |
| return res; |
| } |
| |
| |
| /* Returns the value of LBOUND for an expression. This could be broken out |
| from gfc_conv_intrinsic_bound but this seemed to be simpler. This is |
| called by gfc_alloc_allocatable_for_assignment. */ |
| static tree |
| get_std_lbound (gfc_expr *expr, tree desc, int dim, bool assumed_size) |
| { |
| tree lbound; |
| tree ubound; |
| tree stride; |
| tree cond, cond1, cond3, cond4; |
| tree tmp; |
| gfc_ref *ref; |
| |
| if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (desc))) |
| { |
| tmp = gfc_rank_cst[dim]; |
| lbound = gfc_conv_descriptor_lbound_get (desc, tmp); |
| ubound = gfc_conv_descriptor_ubound_get (desc, tmp); |
| stride = gfc_conv_descriptor_stride_get (desc, tmp); |
| cond1 = fold_build2_loc (input_location, GE_EXPR, logical_type_node, |
| ubound, lbound); |
| cond3 = fold_build2_loc (input_location, GE_EXPR, logical_type_node, |
| stride, gfc_index_zero_node); |
| cond3 = fold_build2_loc (input_location, TRUTH_AND_EXPR, |
| logical_type_node, cond3, cond1); |
| cond4 = fold_build2_loc (input_location, LT_EXPR, logical_type_node, |
| stride, gfc_index_zero_node); |
| if (assumed_size) |
| cond = fold_build2_loc (input_location, EQ_EXPR, logical_type_node, |
| tmp, build_int_cst (gfc_array_index_type, |
| expr->rank - 1)); |
| else |
| cond = logical_false_node; |
| |
| cond1 = fold_build2_loc (input_location, TRUTH_OR_EXPR, |
| logical_type_node, cond3, cond4); |
| cond = fold_build2_loc (input_location, TRUTH_OR_EXPR, |
| logical_type_node, cond, cond1); |
| |
| return fold_build3_loc (input_location, COND_EXPR, |
| gfc_array_index_type, cond, |
| lbound, gfc_index_one_node); |
| } |
| |
| if (expr->expr_type == EXPR_FUNCTION) |
| { |
| /* A conversion function, so use the argument. */ |
| gcc_assert (expr->value.function.isym |
| && expr->value.function.isym->conversion); |
| expr = expr->value.function.actual->expr; |
| } |
| |
| if (expr->expr_type == EXPR_VARIABLE) |
| { |
| tmp = TREE_TYPE (expr->symtree->n.sym->backend_decl); |
| for (ref = expr->ref; ref; ref = ref->next) |
| { |
| if (ref->type == REF_COMPONENT |
| && ref->u.c.component->as |
| && ref->next |
| && ref->next->u.ar.type == AR_FULL) |
| tmp = TREE_TYPE (ref->u.c.component->backend_decl); |
| } |
| return GFC_TYPE_ARRAY_LBOUND(tmp, dim); |
| } |
| |
| return gfc_index_one_node; |
| } |
| |
| |
| /* Returns true if an expression represents an lhs that can be reallocated |
| on assignment. */ |
| |
| bool |
| gfc_is_reallocatable_lhs (gfc_expr *expr) |
| { |
| gfc_ref * ref; |
| gfc_symbol *sym; |
| |
| if (!expr->ref) |
| return false; |
| |
| sym = expr->symtree->n.sym; |
| |
| /* An allocatable class variable with no reference. */ |
| if (sym->ts.type == BT_CLASS |
| && CLASS_DATA (sym)->attr.allocatable |
| && expr->ref && expr->ref->type == REF_COMPONENT |
| && strcmp (expr->ref->u.c.component->name, "_data") == 0 |
| && expr->ref->next == NULL) |
| return true; |
| |
| /* An allocatable variable. */ |
| if (sym->attr.allocatable |
| && expr->ref |
| && expr->ref->type == REF_ARRAY |
| && expr->ref->u.ar.type == AR_FULL) |
| return true; |
| |
| /* All that can be left are allocatable components. */ |
| if ((sym->ts.type != BT_DERIVED |
| && sym->ts.type != BT_CLASS) |
| || !sym->ts.u.derived->attr.alloc_comp) |
| return false; |
| |
| /* Find a component ref followed by an array reference. */ |
| for (ref = expr->ref; ref; ref = ref->next) |
| if (ref->next |
| && ref->type == REF_COMPONENT |
| && ref->next->type == REF_ARRAY |
| && !ref->next->next) |
| break; |
| |
| if (!ref) |
| return false; |
| |
| /* Return true if valid reallocatable lhs. */ |
| if (ref->u.c.component->attr.allocatable |
| && ref->next->u.ar.type == AR_FULL) |
| return true; |
| |
| return false; |
| } |
| |
| |
| static tree |
| concat_str_length (gfc_expr* expr) |
| { |
| tree type; |
| tree len1; |
| tree len2; |
| gfc_se se; |
| |
| type = gfc_typenode_for_spec (&expr->value.op.op1->ts); |
| len1 = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); |
| if (len1 == NULL_TREE) |
| { |
| if (expr->value.op.op1->expr_type == EXPR_OP) |
| len1 = concat_str_length (expr->value.op.op1); |
| else if (expr->value.op.op1->expr_type == EXPR_CONSTANT) |
| len1 = build_int_cst (gfc_charlen_type_node, |
| expr->value.op.op1->value.character.length); |
| else if (expr->value.op.op1->ts.u.cl->length) |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr (&se, expr->value.op.op1->ts.u.cl->length); |
| len1 = se.expr; |
| } |
| else |
| { |
| /* Last resort! */ |
| gfc_init_se (&se, NULL); |
| se.want_pointer = 1; |
| se.descriptor_only = 1; |
| gfc_conv_expr (&se, expr->value.op.op1); |
| len1 = se.string_length; |
| } |
| } |
| |
| type = gfc_typenode_for_spec (&expr->value.op.op2->ts); |
| len2 = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); |
| if (len2 == NULL_TREE) |
| { |
| if (expr->value.op.op2->expr_type == EXPR_OP) |
| len2 = concat_str_length (expr->value.op.op2); |
| else if (expr->value.op.op2->expr_type == EXPR_CONSTANT) |
| len2 = build_int_cst (gfc_charlen_type_node, |
| expr->value.op.op2->value.character.length); |
| else if (expr->value.op.op2->ts.u.cl->length) |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr (&se, expr->value.op.op2->ts.u.cl->length); |
| len2 = se.expr; |
| } |
| else |
| { |
| /* Last resort! */ |
| gfc_init_se (&se, NULL); |
| se.want_pointer = 1; |
| se.descriptor_only = 1; |
| gfc_conv_expr (&se, expr->value.op.op2); |
| len2 = se.string_length; |
| } |
| } |
| |
| gcc_assert(len1 && len2); |
| len1 = fold_convert (gfc_charlen_type_node, len1); |
| len2 = fold_convert (gfc_charlen_type_node, len2); |
| |
| return fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_charlen_type_node, len1, len2); |
| } |
| |
| |
| /* Allocate the lhs of an assignment to an allocatable array, otherwise |
| reallocate it. */ |
| |
| tree |
| gfc_alloc_allocatable_for_assignment (gfc_loopinfo *loop, |
| gfc_expr *expr1, |
| gfc_expr *expr2) |
| { |
| stmtblock_t realloc_block; |
| stmtblock_t alloc_block; |
| stmtblock_t fblock; |
| gfc_ss *rss; |
| gfc_ss *lss; |
| gfc_array_info *linfo; |
| tree realloc_expr; |
| tree alloc_expr; |
| tree size1; |
| tree size2; |
| tree array1; |
| tree cond_null; |
| tree cond; |
| tree tmp; |
| tree tmp2; |
| tree lbound; |
| tree ubound; |
| tree desc; |
| tree old_desc; |
| tree desc2; |
| tree offset; |
| tree jump_label1; |
| tree jump_label2; |
| tree neq_size; |
| tree lbd; |
| int n; |
| int dim; |
| gfc_array_spec * as; |
| bool coarray = (flag_coarray == GFC_FCOARRAY_LIB |
| && gfc_caf_attr (expr1, true).codimension); |
| tree token; |
| gfc_se caf_se; |
| |
| /* x = f(...) with x allocatable. In this case, expr1 is the rhs. |
| Find the lhs expression in the loop chain and set expr1 and |
| expr2 accordingly. */ |
| if (expr1->expr_type == EXPR_FUNCTION && expr2 == NULL) |
| { |
| expr2 = expr1; |
| /* Find the ss for the lhs. */ |
| lss = loop->ss; |
| for (; lss && lss != gfc_ss_terminator; lss = lss->loop_chain) |
| if (lss->info->expr && lss->info->expr->expr_type == EXPR_VARIABLE) |
| break; |
| if (lss == gfc_ss_terminator) |
| return NULL_TREE; |
| expr1 = lss->info->expr; |
| } |
| |
| /* Bail out if this is not a valid allocate on assignment. */ |
| if (!gfc_is_reallocatable_lhs (expr1) |
| || (expr2 && !expr2->rank)) |
| return NULL_TREE; |
| |
| /* Find the ss for the lhs. */ |
| lss = loop->ss; |
| for (; lss && lss != gfc_ss_terminator; lss = lss->loop_chain) |
| if (lss->info->expr == expr1) |
| break; |
| |
| if (lss == gfc_ss_terminator) |
| return NULL_TREE; |
| |
| linfo = &lss->info->data.array; |
| |
| /* Find an ss for the rhs. For operator expressions, we see the |
| ss's for the operands. Any one of these will do. */ |
| rss = loop->ss; |
| for (; rss && rss != gfc_ss_terminator; rss = rss->loop_chain) |
| if (rss->info->expr != expr1 && rss != loop->temp_ss) |
| break; |
| |
| if (expr2 && rss == gfc_ss_terminator) |
| return NULL_TREE; |
| |
| /* Ensure that the string length from the current scope is used. */ |
| if (expr2->ts.type == BT_CHARACTER |
| && expr2->expr_type == EXPR_FUNCTION |
| && !expr2->value.function.isym) |
| expr2->ts.u.cl->backend_decl = rss->info->string_length; |
| |
| gfc_start_block (&fblock); |
| |
| /* Since the lhs is allocatable, this must be a descriptor type. |
| Get the data and array size. */ |
| desc = linfo->descriptor; |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (desc))); |
| array1 = gfc_conv_descriptor_data_get (desc); |
| |
| /* 7.4.1.3 "If variable is an allocated allocatable variable, it is |
| deallocated if expr is an array of different shape or any of the |
| corresponding length type parameter values of variable and expr |
| differ." This assures F95 compatibility. */ |
| jump_label1 = gfc_build_label_decl (NULL_TREE); |
| jump_label2 = gfc_build_label_decl (NULL_TREE); |
| |
| /* Allocate if data is NULL. */ |
| cond_null = fold_build2_loc (input_location, EQ_EXPR, logical_type_node, |
| array1, build_int_cst (TREE_TYPE (array1), 0)); |
| |
| if (expr1->ts.deferred) |
| cond_null = gfc_evaluate_now (logical_true_node, &fblock); |
| else |
| cond_null= gfc_evaluate_now (cond_null, &fblock); |
| |
| tmp = build3_v (COND_EXPR, cond_null, |
| build1_v (GOTO_EXPR, jump_label1), |
| build_empty_stmt (input_location)); |
| gfc_add_expr_to_block (&fblock, tmp); |
| |
| /* Get arrayspec if expr is a full array. */ |
| if (expr2 && expr2->expr_type == EXPR_FUNCTION |
| && expr2->value.function.isym |
| && expr2->value.function.isym->conversion) |
| { |
| /* For conversion functions, take the arg. */ |
| gfc_expr *arg = expr2->value.function.actual->expr; |
| as = gfc_get_full_arrayspec_from_expr (arg); |
| } |
| else if (expr2) |
| as = gfc_get_full_arrayspec_from_expr (expr2); |
| else |
| as = NULL; |
| |
| /* If the lhs shape is not the same as the rhs jump to setting the |
| bounds and doing the reallocation....... */ |
| for (n = 0; n < expr1->rank; n++) |
| { |
| /* Check the shape. */ |
| lbound = gfc_conv_descriptor_lbound_get (desc, gfc_rank_cst[n]); |
| ubound = gfc_conv_descriptor_ubound_get (desc, gfc_rank_cst[n]); |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| loop->to[n], loop->from[n]); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| tmp, lbound); |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| tmp, ubound); |
| cond = fold_build2_loc (input_location, NE_EXPR, |
| logical_type_node, |
| tmp, gfc_index_zero_node); |
| tmp = build3_v (COND_EXPR, cond, |
| build1_v (GOTO_EXPR, jump_label1), |
| build_empty_stmt (input_location)); |
| gfc_add_expr_to_block (&fblock, tmp); |
| } |
| |
| /* ....else jump past the (re)alloc code. */ |
| tmp = build1_v (GOTO_EXPR, jump_label2); |
| gfc_add_expr_to_block (&fblock, tmp); |
| |
| /* Add the label to start automatic (re)allocation. */ |
| tmp = build1_v (LABEL_EXPR, jump_label1); |
| gfc_add_expr_to_block (&fblock, tmp); |
| |
| /* If the lhs has not been allocated, its bounds will not have been |
| initialized and so its size is set to zero. */ |
| size1 = gfc_create_var (gfc_array_index_type, NULL); |
| gfc_init_block (&alloc_block); |
| gfc_add_modify (&alloc_block, size1, gfc_index_zero_node); |
| gfc_init_block (&realloc_block); |
| gfc_add_modify (&realloc_block, size1, |
| gfc_conv_descriptor_size (desc, expr1->rank)); |
| tmp = build3_v (COND_EXPR, cond_null, |
| gfc_finish_block (&alloc_block), |
| gfc_finish_block (&realloc_block)); |
| gfc_add_expr_to_block (&fblock, tmp); |
| |
| /* Get the rhs size and fix it. */ |
| if (expr2) |
| desc2 = rss->info->data.array.descriptor; |
| else |
| desc2 = NULL_TREE; |
| |
| size2 = gfc_index_one_node; |
| for (n = 0; n < expr2->rank; n++) |
| { |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| loop->to[n], loop->from[n]); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| tmp, gfc_index_one_node); |
| size2 = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, |
| tmp, size2); |
| } |
| size2 = gfc_evaluate_now (size2, &fblock); |
| |
| cond = fold_build2_loc (input_location, NE_EXPR, logical_type_node, |
| size1, size2); |
| |
| /* If the lhs is deferred length, assume that the element size |
| changes and force a reallocation. */ |
| if (expr1->ts.deferred) |
| neq_size = gfc_evaluate_now (logical_true_node, &fblock); |
| else |
| neq_size = gfc_evaluate_now (cond, &fblock); |
| |
| /* Deallocation of allocatable components will have to occur on |
| reallocation. Fix the old descriptor now. */ |
| if ((expr1->ts.type == BT_DERIVED) |
| && expr1->ts.u.derived->attr.alloc_comp) |
| old_desc = gfc_evaluate_now (desc, &fblock); |
| else |
| old_desc = NULL_TREE; |
| |
| /* Now modify the lhs descriptor and the associated scalarizer |
| variables. F2003 7.4.1.3: "If variable is or becomes an |
| unallocated allocatable variable, then it is allocated with each |
| deferred type parameter equal to the corresponding type parameters |
| of expr , with the shape of expr , and with each lower bound equal |
| to the corresponding element of LBOUND(expr)." |
| Reuse size1 to keep a dimension-by-dimension track of the |
| stride of the new array. */ |
| size1 = gfc_index_one_node; |
| offset = gfc_index_zero_node; |
| |
| for (n = 0; n < expr2->rank; n++) |
| { |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| loop->to[n], loop->from[n]); |
| tmp = fold_build2_loc (input_location, PLUS_EXPR, |
| gfc_array_index_type, |
| tmp, gfc_index_one_node); |
| |
| lbound = gfc_index_one_node; |
| ubound = tmp; |
| |
| if (as) |
| { |
| lbd = get_std_lbound (expr2, desc2, n, |
| as->type == AS_ASSUMED_SIZE); |
| ubound = fold_build2_loc (input_location, |
| MINUS_EXPR, |
| gfc_array_index_type, |
| ubound, lbound); |
| ubound = fold_build2_loc (input_location, |
| PLUS_EXPR, |
| gfc_array_index_type, |
| ubound, lbd); |
| lbound = lbd; |
| } |
| |
| gfc_conv_descriptor_lbound_set (&fblock, desc, |
| gfc_rank_cst[n], |
| lbound); |
| gfc_conv_descriptor_ubound_set (&fblock, desc, |
| gfc_rank_cst[n], |
| ubound); |
| gfc_conv_descriptor_stride_set (&fblock, desc, |
| gfc_rank_cst[n], |
| size1); |
| lbound = gfc_conv_descriptor_lbound_get (desc, |
| gfc_rank_cst[n]); |
| tmp2 = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, |
| lbound, size1); |
| offset = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, |
| offset, tmp2); |
| size1 = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, |
| tmp, size1); |
| } |
| |
| /* Set the lhs descriptor and scalarizer offsets. For rank > 1, |
| the array offset is saved and the info.offset is used for a |
| running offset. Use the saved_offset instead. */ |
| tmp = gfc_conv_descriptor_offset (desc); |
| gfc_add_modify (&fblock, tmp, offset); |
| if (linfo->saved_offset |
| && VAR_P (linfo->saved_offset)) |
| gfc_add_modify (&fblock, linfo->saved_offset, tmp); |
| |
| /* Now set the deltas for the lhs. */ |
| for (n = 0; n < expr1->rank; n++) |
| { |
| tmp = gfc_conv_descriptor_lbound_get (desc, gfc_rank_cst[n]); |
| dim = lss->dim[n]; |
| tmp = fold_build2_loc (input_location, MINUS_EXPR, |
| gfc_array_index_type, tmp, |
| loop->from[dim]); |
| if (linfo->delta[dim] && VAR_P (linfo->delta[dim])) |
| gfc_add_modify (&fblock, linfo->delta[dim], tmp); |
| } |
| |
| /* Get the new lhs size in bytes. */ |
| if (expr1->ts.type == BT_CHARACTER && expr1->ts.deferred) |
| { |
| if (expr2->ts.deferred) |
| { |
| if (VAR_P (expr2->ts.u.cl->backend_decl)) |
| tmp = expr2->ts.u.cl->backend_decl; |
| else |
| tmp = rss->info->string_length; |
| } |
| else |
| { |
| tmp = expr2->ts.u.cl->backend_decl; |
| if (!tmp && expr2->expr_type == EXPR_OP |
| && expr2->value.op.op == INTRINSIC_CONCAT) |
| { |
| tmp = concat_str_length (expr2); |
| expr2->ts.u.cl->backend_decl = gfc_evaluate_now (tmp, &fblock); |
| } |
| tmp = fold_convert (TREE_TYPE (expr1->ts.u.cl->backend_decl), tmp); |
| } |
| |
| if (expr1->ts.u.cl->backend_decl |
| && VAR_P (expr1->ts.u.cl->backend_decl)) |
| gfc_add_modify (&fblock, expr1->ts.u.cl->backend_decl, tmp); |
| else |
| gfc_add_modify (&fblock, lss->info->string_length, tmp); |
| } |
| else if (expr1->ts.type == BT_CHARACTER && expr1->ts.u.cl->backend_decl) |
| { |
| tmp = TYPE_SIZE_UNIT (TREE_TYPE (gfc_typenode_for_spec (&expr1->ts))); |
| tmp = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, tmp, |
| expr1->ts.u.cl->backend_decl); |
| } |
| else if (UNLIMITED_POLY (expr1) && expr2->ts.type != BT_CLASS) |
| tmp = TYPE_SIZE_UNIT (gfc_typenode_for_spec (&expr2->ts)); |
| else |
| tmp = TYPE_SIZE_UNIT (gfc_typenode_for_spec (&expr1->ts)); |
| tmp = fold_convert (gfc_array_index_type, tmp); |
| size2 = fold_build2_loc (input_location, MULT_EXPR, |
| gfc_array_index_type, |
| tmp, size2); |
| size2 = fold_convert (size_type_node, size2); |
| size2 = fold_build2_loc (input_location, MAX_EXPR, size_type_node, |
| size2, size_one_node); |
| size2 = gfc_evaluate_now (size2, &fblock); |
| |
| /* For deferred character length, the 'size' field of the dtype might |
| have changed so set the dtype. */ |
| if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (desc)) |
| && expr1->ts.type == BT_CHARACTER && expr1->ts.deferred) |
| { |
| tree type; |
| tmp = gfc_conv_descriptor_dtype (desc); |
| if (expr2->ts.u.cl->backend_decl) |
| type = gfc_typenode_for_spec (&expr2->ts); |
| else |
| type = gfc_typenode_for_spec (&expr1->ts); |
| |
| gfc_add_modify (&fblock, tmp, |
| gfc_get_dtype_rank_type (expr1->rank,type)); |
| } |
| else if (UNLIMITED_POLY (expr1) && expr2->ts.type != BT_CLASS) |
| { |
| tree type; |
| tmp = gfc_conv_descriptor_dtype (desc); |
| type = gfc_typenode_for_spec (&expr2->ts); |
| gfc_add_modify (&fblock, tmp, |
| gfc_get_dtype_rank_type (expr2->rank,type)); |
| /* Set the _len field as well... */ |
| tmp = gfc_class_len_get (TREE_OPERAND (desc, 0)); |
| if (expr2->ts.type == BT_CHARACTER) |
| gfc_add_modify (&fblock, tmp, |
| fold_convert (TREE_TYPE (tmp), |
| TYPE_SIZE_UNIT (type))); |
| else |
| gfc_add_modify (&fblock, tmp, |
| build_int_cst (TREE_TYPE (tmp), 0)); |
| /* ...and the vptr. */ |
| tmp = gfc_class_vptr_get (TREE_OPERAND (desc, 0)); |
| tmp2 = gfc_get_symbol_decl (gfc_find_vtab (&expr2->ts)); |
| tmp2 = gfc_build_addr_expr (TREE_TYPE (tmp), tmp2); |
| gfc_add_modify (&fblock, tmp, tmp2); |
| } |
| else if (coarray && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (desc))) |
| { |
| gfc_add_modify (&fblock, gfc_conv_descriptor_dtype (desc), |
| gfc_get_dtype (TREE_TYPE (desc))); |
| } |
| |
| /* Realloc expression. Note that the scalarizer uses desc.data |
| in the array reference - (*desc.data)[<element>]. */ |
| gfc_init_block (&realloc_block); |
| gfc_init_se (&caf_se, NULL); |
| |
| if (coarray) |
| { |
| token = gfc_get_ultimate_alloc_ptr_comps_caf_token (&caf_se, expr1); |
| if (token == NULL_TREE) |
| { |
| tmp = gfc_get_tree_for_caf_expr (expr1); |
| if (POINTER_TYPE_P (TREE_TYPE (tmp))) |
| tmp = build_fold_indirect_ref (tmp); |
| gfc_get_caf_token_offset (&caf_se, &token, NULL, tmp, NULL_TREE, |
| expr1); |
| token = gfc_build_addr_expr (NULL_TREE, token); |
| } |
| |
| gfc_add_block_to_block (&realloc_block, &caf_se.pre); |
| } |
| if ((expr1->ts.type == BT_DERIVED) |
| && expr1->ts.u.derived->attr.alloc_comp) |
| { |
| tmp = gfc_deallocate_alloc_comp_no_caf (expr1->ts.u.derived, old_desc, |
| expr1->rank); |
| gfc_add_expr_to_block (&realloc_block, tmp); |
| } |
| |
| if (!coarray) |
| { |
| tmp = build_call_expr_loc (input_location, |
| builtin_decl_explicit (BUILT_IN_REALLOC), 2, |
| fold_convert (pvoid_type_node, array1), |
| size2); |
| gfc_conv_descriptor_data_set (&realloc_block, |
| desc, tmp); |
| } |
| else |
| { |
| tmp = build_call_expr_loc (input_location, |
| gfor_fndecl_caf_deregister, 5, token, |
| build_int_cst (integer_type_node, |
| GFC_CAF_COARRAY_DEALLOCATE_ONLY), |
| null_pointer_node, null_pointer_node, |
| integer_zero_node); |
| gfc_add_expr_to_block (&realloc_block, tmp); |
| tmp = build_call_expr_loc (input_location, |
| gfor_fndecl_caf_register, |
| 7, size2, |
| build_int_cst (integer_type_node, |
| GFC_CAF_COARRAY_ALLOC_ALLOCATE_ONLY), |
| token, gfc_build_addr_expr (NULL_TREE, desc), |
| null_pointer_node, null_pointer_node, |
| integer_zero_node); |
| gfc_add_expr_to_block (&realloc_block, tmp); |
| } |
| |
| if ((expr1->ts.type == BT_DERIVED) |
| && expr1->ts.u.derived->attr.alloc_comp) |
| { |
| tmp = gfc_nullify_alloc_comp (expr1->ts.u.derived, desc, |
| expr1->rank); |
| gfc_add_expr_to_block (&realloc_block, tmp); |
| } |
| |
| gfc_add_block_to_block (&realloc_block, &caf_se.post); |
| realloc_expr = gfc_finish_block (&realloc_block); |
| |
| /* Only reallocate if sizes are different. */ |
| tmp = build3_v (COND_EXPR, neq_size, realloc_expr, |
| build_empty_stmt (input_location)); |
| realloc_expr = tmp; |
| |
| |
| /* Malloc expression. */ |
| gfc_init_block (&alloc_block); |
| if (!coarray) |
| { |
| tmp = build_call_expr_loc (input_location, |
| builtin_decl_explicit (BUILT_IN_MALLOC), |
| 1, size2); |
| gfc_conv_descriptor_data_set (&alloc_block, |
| desc, tmp); |
| } |
| else |
| { |
| tmp = build_call_expr_loc (input_location, |
| gfor_fndecl_caf_register, |
| 7, size2, |
| build_int_cst (integer_type_node, |
| GFC_CAF_COARRAY_ALLOC), |
| token, gfc_build_addr_expr (NULL_TREE, desc), |
| null_pointer_node, null_pointer_node, |
| integer_zero_node); |
| gfc_add_expr_to_block (&alloc_block, tmp); |
| } |
| |
| |
| /* We already set the dtype in the case of deferred character |
| length arrays and unlimited polymorphic arrays. */ |
| if (!(GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (desc)) |
| && ((expr1->ts.type == BT_CHARACTER && expr1->ts.deferred) |
| || coarray)) |
| && !UNLIMITED_POLY (expr1)) |
| { |
| tmp = gfc_conv_descriptor_dtype (desc); |
| gfc_add_modify (&alloc_block, tmp, gfc_get_dtype (TREE_TYPE (desc))); |
| } |
| |
| if ((expr1->ts.type == BT_DERIVED) |
| && expr1->ts.u.derived->attr.alloc_comp) |
| { |
| tmp = gfc_nullify_alloc_comp (expr1->ts.u.derived, desc, |
| expr1->rank); |
| gfc_add_expr_to_block (&alloc_block, tmp); |
| } |
| alloc_expr = gfc_finish_block (&alloc_block); |
| |
| /* Malloc if not allocated; realloc otherwise. */ |
| tmp = build_int_cst (TREE_TYPE (array1), 0); |
| cond = fold_build2_loc (input_location, EQ_EXPR, |
| logical_type_node, |
| array1, tmp); |
| tmp = build3_v (COND_EXPR, cond, alloc_expr, realloc_expr); |
| gfc_add_expr_to_block (&fblock, tmp); |
| |
| /* Make sure that the scalarizer data pointer is updated. */ |
| if (linfo->data && VAR_P (linfo->data)) |
| { |
| tmp = gfc_conv_descriptor_data_get (desc); |
| gfc_add_modify (&fblock, linfo->data, tmp); |
| } |
| |
| /* Add the exit label. */ |
| tmp = build1_v (LABEL_EXPR, jump_label2); |
| gfc_add_expr_to_block (&fblock, tmp); |
| |
| return gfc_finish_block (&fblock); |
| } |
| |
| |
| /* NULLIFY an allocatable/pointer array on function entry, free it on exit. |
| Do likewise, recursively if necessary, with the allocatable components of |
| derived types. */ |
| |
| void |
| gfc_trans_deferred_array (gfc_symbol * sym, gfc_wrapped_block * block) |
| { |
| tree type; |
| tree tmp; |
| tree descriptor; |
| stmtblock_t init; |
| stmtblock_t cleanup; |
| locus loc; |
| int rank; |
| bool sym_has_alloc_comp, has_finalizer; |
| |
| sym_has_alloc_comp = (sym->ts.type == BT_DERIVED |
| || sym->ts.type == BT_CLASS) |
| && sym->ts.u.derived->attr.alloc_comp; |
| has_finalizer = sym->ts.type == BT_CLASS || sym->ts.type == BT_DERIVED |
| ? gfc_is_finalizable (sym->ts.u.derived, NULL) : false; |
| |
| /* Make sure the frontend gets these right. */ |
| gcc_assert (sym->attr.pointer || sym->attr.allocatable || sym_has_alloc_comp |
| || has_finalizer); |
| |
| gfc_save_backend_locus (&loc); |
| gfc_set_backend_locus (&sym->declared_at); |
| gfc_init_block (&init); |
| |
| gcc_assert (VAR_P (sym->backend_decl) |
| || TREE_CODE (sym->backend_decl) == PARM_DECL); |
| |
| if (sym->ts.type == BT_CHARACTER |
| && !INTEGER_CST_P (sym->ts.u.cl->backend_decl)) |
| { |
| gfc_conv_string_length (sym->ts.u.cl, NULL, &init); |
| gfc_trans_vla_type_sizes (sym, &init); |
| } |
| |
| /* Dummy, use associated and result variables don't need anything special. */ |
| if (sym->attr.dummy || sym->attr.use_assoc || sym->attr.result) |
| { |
| gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE); |
| gfc_restore_backend_locus (&loc); |
| return; |
| } |
| |
| descriptor = sym->backend_decl; |
| |
| /* Although static, derived types with default initializers and |
| allocatable components must not be nulled wholesale; instead they |
| are treated component by component. */ |
| if (TREE_STATIC (descriptor) && !sym_has_alloc_comp && !has_finalizer) |
| { |
| /* SAVEd variables are not freed on exit. */ |
| gfc_trans_static_array_pointer (sym); |
| |
| gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE); |
| gfc_restore_backend_locus (&loc); |
| return; |
| } |
| |
| /* Get the descriptor type. */ |
| type = TREE_TYPE (sym->backend_decl); |
| |
| if ((sym_has_alloc_comp || (has_finalizer && sym->ts.type != BT_CLASS)) |
| && !(sym->attr.pointer || sym->attr.allocatable)) |
| { |
| if (!sym->attr.save |
| && !(TREE_STATIC (sym->backend_decl) && sym->attr.is_main_program)) |
| { |
| if (sym->value == NULL |
| || !gfc_has_default_initializer (sym->ts.u.derived)) |
| { |
| rank = sym->as ? sym->as->rank : 0; |
| tmp = gfc_nullify_alloc_comp (sym->ts.u.derived, |
| descriptor, rank); |
| gfc_add_expr_to_block (&init, tmp); |
| } |
| else |
| gfc_init_default_dt (sym, &init, false); |
| } |
| } |
| else if (!GFC_DESCRIPTOR_TYPE_P (type)) |
| { |
| /* If the backend_decl is not a descriptor, we must have a pointer |
| to one. */ |
| descriptor = build_fold_indirect_ref_loc (input_location, |
| sym->backend_decl); |
| type = TREE_TYPE (descriptor); |
| } |
| |
| /* NULLIFY the data pointer, for non-saved allocatables. */ |
| if (GFC_DESCRIPTOR_TYPE_P (type) && !sym->attr.save && sym->attr.allocatable) |
| { |
| gfc_conv_descriptor_data_set (&init, descriptor, null_pointer_node); |
| if (flag_coarray == GFC_FCOARRAY_LIB && sym->attr.codimension) |
| { |
| /* Declare the variable static so its array descriptor stays present |
| after leaving the scope. It may still be accessed through another |
| image. This may happen, for example, with the caf_mpi |
| implementation. */ |
| TREE_STATIC (descriptor) = 1; |
| tmp = gfc_conv_descriptor_token (descriptor); |
| gfc_add_modify (&init, tmp, fold_convert (TREE_TYPE (tmp), |
| null_pointer_node)); |
| } |
| } |
| |
| gfc_restore_backend_locus (&loc); |
| gfc_init_block (&cleanup); |
| |
| /* Allocatable arrays need to be freed when they go out of scope. |
| The allocatable components of pointers must not be touched. */ |
| if (!sym->attr.allocatable && has_finalizer && sym->ts.type != BT_CLASS |
| && !sym->attr.pointer && !sym->attr.artificial && !sym->attr.save |
| && !sym->ns->proc_name->attr.is_main_program) |
| { |
| gfc_expr *e; |
| sym->attr.referenced = 1; |
| e = gfc_lval_expr_from_sym (sym); |
| gfc_add_finalizer_call (&cleanup, e); |
| gfc_free_expr (e); |
| } |
| else if ((!sym->attr.allocatable || !has_finalizer) |
| && sym_has_alloc_comp && !(sym->attr.function || sym->attr.result) |
| && !sym->attr.pointer && !sym->attr.save |
| && !sym->ns->proc_name->attr.is_main_program) |
| { |
| int rank; |
| rank = sym->as ? sym->as->rank : 0; |
| tmp = gfc_deallocate_alloc_comp (sym->ts.u.derived, descriptor, rank); |
| gfc_add_expr_to_block (&cleanup, tmp); |
| } |
| |
| if (sym->attr.allocatable && (sym->attr.dimension || sym->attr.codimension) |
| && !sym->attr.save && !sym->attr.result |
| && !sym->ns->proc_name->attr.is_main_program) |
| { |
| gfc_expr *e; |
| e = has_finalizer ? gfc_lval_expr_from_sym (sym) : NULL; |
| tmp = gfc_deallocate_with_status (sym->backend_decl, NULL_TREE, NULL_TREE, |
| NULL_TREE, NULL_TREE, true, e, |
| sym->attr.codimension |
| ? GFC_CAF_COARRAY_DEREGISTER |
| : GFC_CAF_COARRAY_NOCOARRAY); |
| if (e) |
| gfc_free_expr (e); |
| gfc_add_expr_to_block (&cleanup, tmp); |
| } |
| |
| gfc_add_init_cleanup (block, gfc_finish_block (&init), |
| gfc_finish_block (&cleanup)); |
| } |
| |
| /************ Expression Walking Functions ******************/ |
| |
| /* Walk a variable reference. |
| |
| Possible extension - multiple component subscripts. |
| x(:,:) = foo%a(:)%b(:) |
| Transforms to |
| forall (i=..., j=...) |
| x(i,j) = foo%a(j)%b(i) |
| end forall |
| This adds a fair amount of complexity because you need to deal with more |
| than one ref. Maybe handle in a similar manner to vector subscripts. |
| Maybe not worth the effort. */ |
| |
| |
| static gfc_ss * |
| gfc_walk_variable_expr (gfc_ss * ss, gfc_expr * expr) |
| { |
| gfc_ref *ref; |
| |
| for (ref = expr->ref; ref; ref = ref->next) |
| if (ref->type == REF_ARRAY && ref->u.ar.type != AR_ELEMENT) |
| break; |
| |
| return gfc_walk_array_ref (ss, expr, ref); |
| } |
| |
| |
| gfc_ss * |
| gfc_walk_array_ref (gfc_ss * ss, gfc_expr * expr, gfc_ref * ref) |
| { |
| gfc_array_ref *ar; |
| gfc_ss *newss; |
| int n; |
| |
| for (; ref; ref = ref->next) |
| { |
| if (ref->type == REF_SUBSTRING) |
| { |
| ss = gfc_get_scalar_ss (ss, ref->u.ss.start); |
| ss = gfc_get_scalar_ss (ss, ref->u.ss.end); |
| } |
| |
| /* We're only interested in array sections from now on. */ |
| if (ref->type != REF_ARRAY) |
| continue; |
| |
| ar = &ref->u.ar; |
| |
| switch (ar->type) |
| { |
| case AR_ELEMENT: |
| for (n = ar->dimen - 1; n >= 0; n--) |
| ss = gfc_get_scalar_ss (ss, ar->start[n]); |
| break; |
| |
| case AR_FULL: |
| newss = gfc_get_array_ss (ss, expr, ar->as->rank, GFC_SS_SECTION); |
| newss->info->data.array.ref = ref; |
| |
| /* Make sure array is the same as array(:,:), this way |
| we don't need to special case all the time. */ |
| ar->dimen = ar->as->rank; |
| for (n = 0; n < ar->dimen; n++) |
| { |
| ar->dimen_type[n] = DIMEN_RANGE; |
| |
| gcc_assert (ar->start[n] == NULL); |
| gcc_assert (ar->end[n] == NULL); |
| gcc_assert (ar->stride[n] == NULL); |
| } |
| ss = newss; |
| break; |
| |
| case AR_SECTION: |
| newss = gfc_get_array_ss (ss, expr, 0, GFC_SS_SECTION); |
| newss->info->data.array.ref = ref; |
| |
| /* We add SS chains for all the subscripts in the section. */ |
| for (n = 0; n < ar->dimen; n++) |
| { |
| gfc_ss *indexss; |
| |
| switch (ar->dimen_type[n]) |
| { |
| case DIMEN_ELEMENT: |
| /* Add SS for elemental (scalar) subscripts. */ |
| gcc_assert (ar->start[n]); |
| indexss = gfc_get_scalar_ss (gfc_ss_terminator, ar->start[n]); |
| indexss->loop_chain = gfc_ss_terminator; |
| newss->info->data.array.subscript[n] = indexss; |
| break; |
| |
| case DIMEN_RANGE: |
| /* We don't add anything for sections, just remember this |
| dimension for later. */ |
| newss->dim[newss->dimen] = n; |
| newss->dimen++; |
| break; |
| |
| case DIMEN_VECTOR: |
| /* Create a GFC_SS_VECTOR index in which we can store |
| the vector's descriptor. */ |
| indexss = gfc_get_array_ss (gfc_ss_terminator, ar->start[n], |
| 1, GFC_SS_VECTOR); |
| indexss->loop_chain = gfc_ss_terminator; |
| newss->info->data.array.subscript[n] = indexss; |
| newss->dim[newss->dimen] = n; |
| newss->dimen++; |
| break; |
| |
| default: |
| /* We should know what sort of section it is by now. */ |
| gcc_unreachable (); |
| } |
| } |
| /* We should have at least one non-elemental dimension, |
| unless we are creating a descriptor for a (scalar) coarray. */ |
| gcc_assert (newss->dimen > 0 |
| || newss->info->data.array.ref->u.ar.as->corank > 0); |
| ss = newss; |
| break; |
| |
| default: |
| /* We should know what sort of section it is by now. */ |
| gcc_unreachable (); |
| } |
| |
| } |
| return ss; |
| } |
| |
| |
| /* Walk an expression operator. If only one operand of a binary expression is |
| scalar, we must also add the scalar term to the SS chain. */ |
| |
| static gfc_ss * |
| gfc_walk_op_expr (gfc_ss * ss, gfc_expr * expr) |
| { |
| gfc_ss *head; |
| gfc_ss *head2; |
| |
| head = gfc_walk_subexpr (ss, expr->value.op.op1); |
| if (expr->value.op.op2 == NULL) |
| head2 = head; |
| else |
| head2 = gfc_walk_subexpr (head, expr->value.op.op2); |
| |
| /* All operands are scalar. Pass back and let the caller deal with it. */ |
| if (head2 == ss) |
| return head2; |
| |
| /* All operands require scalarization. */ |
| if (head != ss && (expr->value.op.op2 == NULL || head2 != head)) |
| return head2; |
| |
| /* One of the operands needs scalarization, the other is scalar. |
| Create a gfc_ss for the scalar expression. */ |
| if (head == ss) |
| { |
| /* First operand is scalar. We build the chain in reverse order, so |
| add the scalar SS after the second operand. */ |
| head = head2; |
| while (head && head->next != ss) |
| head = head->next; |
| /* Check we haven't somehow broken the chain. */ |
| gcc_assert (head); |
| head->next = gfc_get_scalar_ss (ss, expr->value.op.op1); |
| } |
| else /* head2 == head */ |
| { |
| gcc_assert (head2 == head); |
| /* Second operand is scalar. */ |
| head2 = gfc_get_scalar_ss (head2, expr->value.op.op2); |
| } |
| |
| return head2; |
| } |
| |
| |
| /* Reverse a SS chain. */ |
| |
| gfc_ss * |
| gfc_reverse_ss (gfc_ss * ss) |
| { |
| gfc_ss *next; |
| gfc_ss *head; |
| |
| gcc_assert (ss != NULL); |
| |
| head = gfc_ss_terminator; |
| while (ss != gfc_ss_terminator) |
| { |
| next = ss->next; |
| /* Check we didn't somehow break the chain. */ |
| gcc_assert (next != NULL); |
| ss->next = head; |
| head = ss; |
| ss = next; |
| } |
| |
| return (head); |
| } |
| |
| |
| /* Given an expression referring to a procedure, return the symbol of its |
| interface. We can't get the procedure symbol directly as we have to handle |
| the case of (deferred) type-bound procedures. */ |
| |
| gfc_symbol * |
| gfc_get_proc_ifc_for_expr (gfc_expr *procedure_ref) |
| { |
| gfc_symbol *sym; |
| gfc_ref *ref; |
| |
| if (procedure_ref == NULL) |
| return NULL; |
| |
| /* Normal procedure case. */ |
| if (procedure_ref->expr_type == EXPR_FUNCTION |
| && procedure_ref->value.function.esym) |
| sym = procedure_ref->value.function.esym; |
| else |
| sym = procedure_ref->symtree->n.sym; |
| |
| /* Typebound procedure case. */ |
| for (ref = procedure_ref->ref; ref; ref = ref->next) |
| { |
| if (ref->type == REF_COMPONENT |
| && ref->u.c.component->attr.proc_pointer) |
| sym = ref->u.c.component->ts.interface; |
| else |
| sym = NULL; |
| } |
| |
| return sym; |
| } |
| |
| |
| /* Walk the arguments of an elemental function. |
| PROC_EXPR is used to check whether an argument is permitted to be absent. If |
| it is NULL, we don't do the check and the argument is assumed to be present. |
| */ |
| |
| gfc_ss * |
| gfc_walk_elemental_function_args (gfc_ss * ss, gfc_actual_arglist *arg, |
| gfc_symbol *proc_ifc, gfc_ss_type type) |
| { |
| gfc_formal_arglist *dummy_arg; |
| int scalar; |
| gfc_ss *head; |
| gfc_ss *tail; |
| gfc_ss *newss; |
| |
| head = gfc_ss_terminator; |
| tail = NULL; |
| |
| if (proc_ifc) |
| dummy_arg = gfc_sym_get_dummy_args (proc_ifc); |
| else |
| dummy_arg = NULL; |
| |
| scalar = 1; |
| for (; arg; arg = arg->next) |
| { |
| if (!arg->expr || arg->expr->expr_type == EXPR_NULL) |
| goto loop_continue; |
| |
| newss = gfc_walk_subexpr (head, arg->expr); |
| if (newss == head) |
| { |
| /* Scalar argument. */ |
| gcc_assert (type == GFC_SS_SCALAR || type == GFC_SS_REFERENCE); |
| newss = gfc_get_scalar_ss (head, arg->expr); |
| newss->info->type = type; |
| if (dummy_arg) |
| newss->info->data.scalar.dummy_arg = dummy_arg->sym; |
| } |
| else |
| scalar = 0; |
| |
| if (dummy_arg != NULL |
| && dummy_arg->sym->attr.optional |
| && arg->expr->expr_type == EXPR_VARIABLE |
| && (gfc_expr_attr (arg->expr).optional |
| || gfc_expr_attr (arg->expr).allocatable |
| || gfc_expr_attr (arg->expr).pointer)) |
| newss->info->can_be_null_ref = true; |
| |
| head = newss; |
| if (!tail) |
| { |
| tail = head; |
| while (tail->next != gfc_ss_terminator) |
| tail = tail->next; |
| } |
| |
| loop_continue: |
| if (dummy_arg != NULL) |
| dummy_arg = dummy_arg->next; |
| } |
| |
| if (scalar) |
| { |
| /* If all the arguments are scalar we don't need the argument SS. */ |
| gfc_free_ss_chain (head); |
| /* Pass it back. */ |
| return ss; |
| } |
| |
| /* Add it onto the existing chain. */ |
| tail->next = ss; |
| return head; |
| } |
| |
| |
| /* Walk a function call. Scalar functions are passed back, and taken out of |
| scalarization loops. For elemental functions we walk their arguments. |
| The result of functions returning arrays is stored in a temporary outside |
| the loop, so that the function is only called once. Hence we do not need |
| to walk their arguments. */ |
| |
| static gfc_ss * |
| gfc_walk_function_expr (gfc_ss * ss, gfc_expr * expr) |
| { |
| gfc_intrinsic_sym *isym; |
| gfc_symbol *sym; |
| gfc_component *comp = NULL; |
| |
| isym = expr->value.function.isym; |
| |
| /* Handle intrinsic functions separately. */ |
| if (isym) |
| return gfc_walk_intrinsic_function (ss, expr, isym); |
| |
| sym = expr->value.function.esym; |
| if (!sym) |
| sym = expr->symtree->n.sym; |
| |
| if (gfc_is_class_array_function (expr)) |
| return gfc_get_array_ss (ss, expr, |
| CLASS_DATA (expr->value.function.esym->result)->as->rank, |
| GFC_SS_FUNCTION); |
| |
| /* A function that returns arrays. */ |
| comp = gfc_get_proc_ptr_comp (expr); |
| if ((!comp && gfc_return_by_reference (sym) && sym->result->attr.dimension) |
| || (comp && comp->attr.dimension)) |
| return gfc_get_array_ss (ss, expr, expr->rank, GFC_SS_FUNCTION); |
| |
| /* Walk the parameters of an elemental function. For now we always pass |
| by reference. */ |
| if (sym->attr.elemental || (comp && comp->attr.elemental)) |
| { |
| gfc_ss *old_ss = ss; |
| |
| ss = gfc_walk_elemental_function_args (old_ss, |
| expr->value.function.actual, |
| gfc_get_proc_ifc_for_expr (expr), |
| GFC_SS_REFERENCE); |
| if (ss != old_ss |
| && (comp |
| || sym->attr.proc_pointer |
| || sym->attr.if_source != IFSRC_DECL |
| || sym->attr.array_outer_dependency)) |
| ss->info->array_outer_dependency = 1; |
| } |
| |
| /* Scalar functions are OK as these are evaluated outside the scalarization |
| loop. Pass back and let the caller deal with it. */ |
| return ss; |
| } |
| |
| |
| /* An array temporary is constructed for array constructors. */ |
| |
| static gfc_ss * |
| gfc_walk_array_constructor (gfc_ss * ss, gfc_expr * expr) |
| { |
| return gfc_get_array_ss (ss, expr, expr->rank, GFC_SS_CONSTRUCTOR); |
| } |
| |
| |
| /* Walk an expression. Add walked expressions to the head of the SS chain. |
| A wholly scalar expression will not be added. */ |
| |
| gfc_ss * |
| gfc_walk_subexpr (gfc_ss * ss, gfc_expr * expr) |
| { |
| gfc_ss *head; |
| |
| switch (expr->expr_type) |
| { |
| case EXPR_VARIABLE: |
| head = gfc_walk_variable_expr (ss, expr); |
| return head; |
| |
| case EXPR_OP: |
| head = gfc_walk_op_expr (ss, expr); |
| return head; |
| |
| case EXPR_FUNCTION: |
| head = gfc_walk_function_expr (ss, expr); |
| return head; |
| |
| case EXPR_CONSTANT: |
| case EXPR_NULL: |
| case EXPR_STRUCTURE: |
| /* Pass back and let the caller deal with it. */ |
| break; |
| |
| case EXPR_ARRAY: |
| head = gfc_walk_array_constructor (ss, expr); |
| return head; |
| |
| case EXPR_SUBSTRING: |
| /* Pass back and let the caller deal with it. */ |
| break; |
| |
| default: |
| gfc_internal_error ("bad expression type during walk (%d)", |
| expr->expr_type); |
| } |
| return ss; |
| } |
| |
| |
| /* Entry point for expression walking. |
| A return value equal to the passed chain means this is |
| a scalar expression. It is up to the caller to take whatever action is |
| necessary to translate these. */ |
| |
| gfc_ss * |
| gfc_walk_expr (gfc_expr * expr) |
| { |
| gfc_ss *res; |
| |
| res = gfc_walk_subexpr (gfc_ss_terminator, expr); |
| return gfc_reverse_ss (res); |
| } |
