| /* Backend function setup |
| Copyright (C) 2002-2022 Free Software Foundation, Inc. |
| Contributed by Paul Brook |
| |
| 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-decl.cc -- Handling of backend function and variable decls, etc */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "target.h" |
| #include "function.h" |
| #include "tree.h" |
| #include "gfortran.h" |
| #include "gimple-expr.h" /* For create_tmp_var_raw. */ |
| #include "trans.h" |
| #include "stringpool.h" |
| #include "cgraph.h" |
| #include "fold-const.h" |
| #include "stor-layout.h" |
| #include "varasm.h" |
| #include "attribs.h" |
| #include "dumpfile.h" |
| #include "toplev.h" /* For announce_function. */ |
| #include "debug.h" |
| #include "constructor.h" |
| #include "trans-types.h" |
| #include "trans-array.h" |
| #include "trans-const.h" |
| /* Only for gfc_trans_code. Shouldn't need to include this. */ |
| #include "trans-stmt.h" |
| #include "gomp-constants.h" |
| #include "gimplify.h" |
| #include "omp-general.h" |
| #include "attr-fnspec.h" |
| |
| #define MAX_LABEL_VALUE 99999 |
| |
| |
| /* Holds the result of the function if no result variable specified. */ |
| |
| static GTY(()) tree current_fake_result_decl; |
| static GTY(()) tree parent_fake_result_decl; |
| |
| |
| /* Holds the variable DECLs for the current function. */ |
| |
| static GTY(()) tree saved_function_decls; |
| static GTY(()) tree saved_parent_function_decls; |
| |
| /* Holds the variable DECLs that are locals. */ |
| |
| static GTY(()) tree saved_local_decls; |
| |
| /* The namespace of the module we're currently generating. Only used while |
| outputting decls for module variables. Do not rely on this being set. */ |
| |
| static gfc_namespace *module_namespace; |
| |
| /* The currently processed procedure symbol. */ |
| static gfc_symbol* current_procedure_symbol = NULL; |
| |
| /* The currently processed module. */ |
| static struct module_htab_entry *cur_module; |
| |
| /* With -fcoarray=lib: For generating the registering call |
| of static coarrays. */ |
| static bool has_coarray_vars; |
| static stmtblock_t caf_init_block; |
| |
| |
| /* List of static constructor functions. */ |
| |
| tree gfc_static_ctors; |
| |
| |
| /* Whether we've seen a symbol from an IEEE module in the namespace. */ |
| static int seen_ieee_symbol; |
| |
| /* Function declarations for builtin library functions. */ |
| |
| tree gfor_fndecl_pause_numeric; |
| tree gfor_fndecl_pause_string; |
| tree gfor_fndecl_stop_numeric; |
| tree gfor_fndecl_stop_string; |
| tree gfor_fndecl_error_stop_numeric; |
| tree gfor_fndecl_error_stop_string; |
| tree gfor_fndecl_runtime_error; |
| tree gfor_fndecl_runtime_error_at; |
| tree gfor_fndecl_runtime_warning_at; |
| tree gfor_fndecl_os_error_at; |
| tree gfor_fndecl_generate_error; |
| tree gfor_fndecl_set_args; |
| tree gfor_fndecl_set_fpe; |
| tree gfor_fndecl_set_options; |
| tree gfor_fndecl_set_convert; |
| tree gfor_fndecl_set_record_marker; |
| tree gfor_fndecl_set_max_subrecord_length; |
| tree gfor_fndecl_ctime; |
| tree gfor_fndecl_fdate; |
| tree gfor_fndecl_ttynam; |
| tree gfor_fndecl_in_pack; |
| tree gfor_fndecl_in_unpack; |
| tree gfor_fndecl_associated; |
| tree gfor_fndecl_system_clock4; |
| tree gfor_fndecl_system_clock8; |
| tree gfor_fndecl_ieee_procedure_entry; |
| tree gfor_fndecl_ieee_procedure_exit; |
| |
| /* Coarray run-time library function decls. */ |
| tree gfor_fndecl_caf_init; |
| tree gfor_fndecl_caf_finalize; |
| tree gfor_fndecl_caf_this_image; |
| tree gfor_fndecl_caf_num_images; |
| tree gfor_fndecl_caf_register; |
| tree gfor_fndecl_caf_deregister; |
| tree gfor_fndecl_caf_get; |
| tree gfor_fndecl_caf_send; |
| tree gfor_fndecl_caf_sendget; |
| tree gfor_fndecl_caf_get_by_ref; |
| tree gfor_fndecl_caf_send_by_ref; |
| tree gfor_fndecl_caf_sendget_by_ref; |
| tree gfor_fndecl_caf_sync_all; |
| tree gfor_fndecl_caf_sync_memory; |
| tree gfor_fndecl_caf_sync_images; |
| tree gfor_fndecl_caf_stop_str; |
| tree gfor_fndecl_caf_stop_numeric; |
| tree gfor_fndecl_caf_error_stop; |
| tree gfor_fndecl_caf_error_stop_str; |
| tree gfor_fndecl_caf_atomic_def; |
| tree gfor_fndecl_caf_atomic_ref; |
| tree gfor_fndecl_caf_atomic_cas; |
| tree gfor_fndecl_caf_atomic_op; |
| tree gfor_fndecl_caf_lock; |
| tree gfor_fndecl_caf_unlock; |
| tree gfor_fndecl_caf_event_post; |
| tree gfor_fndecl_caf_event_wait; |
| tree gfor_fndecl_caf_event_query; |
| tree gfor_fndecl_caf_fail_image; |
| tree gfor_fndecl_caf_failed_images; |
| tree gfor_fndecl_caf_image_status; |
| tree gfor_fndecl_caf_stopped_images; |
| tree gfor_fndecl_caf_form_team; |
| tree gfor_fndecl_caf_change_team; |
| tree gfor_fndecl_caf_end_team; |
| tree gfor_fndecl_caf_sync_team; |
| tree gfor_fndecl_caf_get_team; |
| tree gfor_fndecl_caf_team_number; |
| tree gfor_fndecl_co_broadcast; |
| tree gfor_fndecl_co_max; |
| tree gfor_fndecl_co_min; |
| tree gfor_fndecl_co_reduce; |
| tree gfor_fndecl_co_sum; |
| tree gfor_fndecl_caf_is_present; |
| tree gfor_fndecl_caf_random_init; |
| |
| |
| /* Math functions. Many other math functions are handled in |
| trans-intrinsic.cc. */ |
| |
| gfc_powdecl_list gfor_fndecl_math_powi[4][3]; |
| tree gfor_fndecl_math_ishftc4; |
| tree gfor_fndecl_math_ishftc8; |
| tree gfor_fndecl_math_ishftc16; |
| |
| |
| /* String functions. */ |
| |
| tree gfor_fndecl_compare_string; |
| tree gfor_fndecl_concat_string; |
| tree gfor_fndecl_string_len_trim; |
| tree gfor_fndecl_string_index; |
| tree gfor_fndecl_string_scan; |
| tree gfor_fndecl_string_verify; |
| tree gfor_fndecl_string_trim; |
| tree gfor_fndecl_string_minmax; |
| tree gfor_fndecl_adjustl; |
| tree gfor_fndecl_adjustr; |
| tree gfor_fndecl_select_string; |
| tree gfor_fndecl_compare_string_char4; |
| tree gfor_fndecl_concat_string_char4; |
| tree gfor_fndecl_string_len_trim_char4; |
| tree gfor_fndecl_string_index_char4; |
| tree gfor_fndecl_string_scan_char4; |
| tree gfor_fndecl_string_verify_char4; |
| tree gfor_fndecl_string_trim_char4; |
| tree gfor_fndecl_string_minmax_char4; |
| tree gfor_fndecl_adjustl_char4; |
| tree gfor_fndecl_adjustr_char4; |
| tree gfor_fndecl_select_string_char4; |
| |
| |
| /* Conversion between character kinds. */ |
| tree gfor_fndecl_convert_char1_to_char4; |
| tree gfor_fndecl_convert_char4_to_char1; |
| |
| |
| /* Other misc. runtime library functions. */ |
| tree gfor_fndecl_iargc; |
| tree gfor_fndecl_kill; |
| tree gfor_fndecl_kill_sub; |
| tree gfor_fndecl_is_contiguous0; |
| |
| |
| /* Intrinsic functions implemented in Fortran. */ |
| tree gfor_fndecl_sc_kind; |
| tree gfor_fndecl_si_kind; |
| tree gfor_fndecl_sr_kind; |
| |
| /* BLAS gemm functions. */ |
| tree gfor_fndecl_sgemm; |
| tree gfor_fndecl_dgemm; |
| tree gfor_fndecl_cgemm; |
| tree gfor_fndecl_zgemm; |
| |
| /* RANDOM_INIT function. */ |
| tree gfor_fndecl_random_init; /* libgfortran, 1 image only. */ |
| |
| static void |
| gfc_add_decl_to_parent_function (tree decl) |
| { |
| gcc_assert (decl); |
| DECL_CONTEXT (decl) = DECL_CONTEXT (current_function_decl); |
| DECL_NONLOCAL (decl) = 1; |
| DECL_CHAIN (decl) = saved_parent_function_decls; |
| saved_parent_function_decls = decl; |
| } |
| |
| void |
| gfc_add_decl_to_function (tree decl) |
| { |
| gcc_assert (decl); |
| TREE_USED (decl) = 1; |
| DECL_CONTEXT (decl) = current_function_decl; |
| DECL_CHAIN (decl) = saved_function_decls; |
| saved_function_decls = decl; |
| } |
| |
| static void |
| add_decl_as_local (tree decl) |
| { |
| gcc_assert (decl); |
| TREE_USED (decl) = 1; |
| DECL_CONTEXT (decl) = current_function_decl; |
| DECL_CHAIN (decl) = saved_local_decls; |
| saved_local_decls = decl; |
| } |
| |
| |
| /* Build a backend label declaration. Set TREE_USED for named labels. |
| The context of the label is always the current_function_decl. All |
| labels are marked artificial. */ |
| |
| tree |
| gfc_build_label_decl (tree label_id) |
| { |
| /* 2^32 temporaries should be enough. */ |
| static unsigned int tmp_num = 1; |
| tree label_decl; |
| char *label_name; |
| |
| if (label_id == NULL_TREE) |
| { |
| /* Build an internal label name. */ |
| ASM_FORMAT_PRIVATE_NAME (label_name, "L", tmp_num++); |
| label_id = get_identifier (label_name); |
| } |
| else |
| label_name = NULL; |
| |
| /* Build the LABEL_DECL node. Labels have no type. */ |
| label_decl = build_decl (input_location, |
| LABEL_DECL, label_id, void_type_node); |
| DECL_CONTEXT (label_decl) = current_function_decl; |
| SET_DECL_MODE (label_decl, VOIDmode); |
| |
| /* We always define the label as used, even if the original source |
| file never references the label. We don't want all kinds of |
| spurious warnings for old-style Fortran code with too many |
| labels. */ |
| TREE_USED (label_decl) = 1; |
| |
| DECL_ARTIFICIAL (label_decl) = 1; |
| return label_decl; |
| } |
| |
| |
| /* Set the backend source location of a decl. */ |
| |
| void |
| gfc_set_decl_location (tree decl, locus * loc) |
| { |
| DECL_SOURCE_LOCATION (decl) = gfc_get_location (loc); |
| } |
| |
| |
| /* Return the backend label declaration for a given label structure, |
| or create it if it doesn't exist yet. */ |
| |
| tree |
| gfc_get_label_decl (gfc_st_label * lp) |
| { |
| if (lp->backend_decl) |
| return lp->backend_decl; |
| else |
| { |
| char label_name[GFC_MAX_SYMBOL_LEN + 1]; |
| tree label_decl; |
| |
| /* Validate the label declaration from the front end. */ |
| gcc_assert (lp != NULL && lp->value <= MAX_LABEL_VALUE); |
| |
| /* Build a mangled name for the label. */ |
| sprintf (label_name, "__label_%.6d", lp->value); |
| |
| /* Build the LABEL_DECL node. */ |
| label_decl = gfc_build_label_decl (get_identifier (label_name)); |
| |
| /* Tell the debugger where the label came from. */ |
| if (lp->value <= MAX_LABEL_VALUE) /* An internal label. */ |
| gfc_set_decl_location (label_decl, &lp->where); |
| else |
| DECL_ARTIFICIAL (label_decl) = 1; |
| |
| /* Store the label in the label list and return the LABEL_DECL. */ |
| lp->backend_decl = label_decl; |
| return label_decl; |
| } |
| } |
| |
| /* Return the name of an identifier. */ |
| |
| static const char * |
| sym_identifier (gfc_symbol *sym) |
| { |
| if (sym->attr.is_main_program && strcmp (sym->name, "main") == 0) |
| return "MAIN__"; |
| else |
| return sym->name; |
| } |
| |
| /* Convert a gfc_symbol to an identifier of the same name. */ |
| |
| static tree |
| gfc_sym_identifier (gfc_symbol * sym) |
| { |
| return get_identifier (sym_identifier (sym)); |
| } |
| |
| /* Construct mangled name from symbol name. */ |
| |
| static const char * |
| mangled_identifier (gfc_symbol *sym) |
| { |
| gfc_symbol *proc = sym->ns->proc_name; |
| static char name[3*GFC_MAX_MANGLED_SYMBOL_LEN + 14]; |
| /* Prevent the mangling of identifiers that have an assigned |
| binding label (mainly those that are bind(c)). */ |
| |
| if (sym->attr.is_bind_c == 1 && sym->binding_label) |
| return sym->binding_label; |
| |
| if (!sym->fn_result_spec |
| || (sym->module && !(proc && proc->attr.flavor == FL_PROCEDURE))) |
| { |
| if (sym->module == NULL) |
| return sym_identifier (sym); |
| else |
| snprintf (name, sizeof name, "__%s_MOD_%s", sym->module, sym->name); |
| } |
| else |
| { |
| /* This is an entity that is actually local to a module procedure |
| that appears in the result specification expression. Since |
| sym->module will be a zero length string, we use ns->proc_name |
| to provide the module name instead. */ |
| if (proc && proc->module) |
| snprintf (name, sizeof name, "__%s_MOD__%s_PROC_%s", |
| proc->module, proc->name, sym->name); |
| else |
| snprintf (name, sizeof name, "__%s_PROC_%s", |
| proc->name, sym->name); |
| } |
| |
| return name; |
| } |
| |
| /* Get mangled identifier, adding the symbol to the global table if |
| it is not yet already there. */ |
| |
| static tree |
| gfc_sym_mangled_identifier (gfc_symbol * sym) |
| { |
| tree result; |
| gfc_gsymbol *gsym; |
| const char *name; |
| |
| name = mangled_identifier (sym); |
| result = get_identifier (name); |
| |
| gsym = gfc_find_gsymbol (gfc_gsym_root, name); |
| if (gsym == NULL) |
| { |
| gsym = gfc_get_gsymbol (name, false); |
| gsym->ns = sym->ns; |
| gsym->sym_name = sym->name; |
| } |
| |
| return result; |
| } |
| |
| /* Construct mangled function name from symbol name. */ |
| |
| static tree |
| gfc_sym_mangled_function_id (gfc_symbol * sym) |
| { |
| int has_underscore; |
| char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1]; |
| |
| /* It may be possible to simply use the binding label if it's |
| provided, and remove the other checks. Then we could use it |
| for other things if we wished. */ |
| if ((sym->attr.is_bind_c == 1 || sym->attr.is_iso_c == 1) && |
| sym->binding_label) |
| /* use the binding label rather than the mangled name */ |
| return get_identifier (sym->binding_label); |
| |
| if ((sym->module == NULL || sym->attr.proc == PROC_EXTERNAL |
| || (sym->module != NULL && (sym->attr.external |
| || sym->attr.if_source == IFSRC_IFBODY))) |
| && !sym->attr.module_procedure) |
| { |
| /* Main program is mangled into MAIN__. */ |
| if (sym->attr.is_main_program) |
| return get_identifier ("MAIN__"); |
| |
| /* Intrinsic procedures are never mangled. */ |
| if (sym->attr.proc == PROC_INTRINSIC) |
| return get_identifier (sym->name); |
| |
| if (flag_underscoring) |
| { |
| has_underscore = strchr (sym->name, '_') != 0; |
| if (flag_second_underscore && has_underscore) |
| snprintf (name, sizeof name, "%s__", sym->name); |
| else |
| snprintf (name, sizeof name, "%s_", sym->name); |
| return get_identifier (name); |
| } |
| else |
| return get_identifier (sym->name); |
| } |
| else |
| { |
| snprintf (name, sizeof name, "__%s_MOD_%s", sym->module, sym->name); |
| return get_identifier (name); |
| } |
| } |
| |
| |
| void |
| gfc_set_decl_assembler_name (tree decl, tree name) |
| { |
| tree target_mangled = targetm.mangle_decl_assembler_name (decl, name); |
| SET_DECL_ASSEMBLER_NAME (decl, target_mangled); |
| } |
| |
| |
| /* Returns true if a variable of specified size should go on the stack. */ |
| |
| int |
| gfc_can_put_var_on_stack (tree size) |
| { |
| unsigned HOST_WIDE_INT low; |
| |
| if (!INTEGER_CST_P (size)) |
| return 0; |
| |
| if (flag_max_stack_var_size < 0) |
| return 1; |
| |
| if (!tree_fits_uhwi_p (size)) |
| return 0; |
| |
| low = TREE_INT_CST_LOW (size); |
| if (low > (unsigned HOST_WIDE_INT) flag_max_stack_var_size) |
| return 0; |
| |
| /* TODO: Set a per-function stack size limit. */ |
| |
| return 1; |
| } |
| |
| |
| /* gfc_finish_cray_pointee sets DECL_VALUE_EXPR for a Cray pointee to |
| an expression involving its corresponding pointer. There are |
| 2 cases; one for variable size arrays, and one for everything else, |
| because variable-sized arrays require one fewer level of |
| indirection. */ |
| |
| static void |
| gfc_finish_cray_pointee (tree decl, gfc_symbol *sym) |
| { |
| tree ptr_decl = gfc_get_symbol_decl (sym->cp_pointer); |
| tree value; |
| |
| /* Parameters need to be dereferenced. */ |
| if (sym->cp_pointer->attr.dummy) |
| ptr_decl = build_fold_indirect_ref_loc (input_location, |
| ptr_decl); |
| |
| /* Check to see if we're dealing with a variable-sized array. */ |
| if (sym->attr.dimension |
| && TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE) |
| { |
| /* These decls will be dereferenced later, so we don't dereference |
| them here. */ |
| value = convert (TREE_TYPE (decl), ptr_decl); |
| } |
| else |
| { |
| ptr_decl = convert (build_pointer_type (TREE_TYPE (decl)), |
| ptr_decl); |
| value = build_fold_indirect_ref_loc (input_location, |
| ptr_decl); |
| } |
| |
| SET_DECL_VALUE_EXPR (decl, value); |
| DECL_HAS_VALUE_EXPR_P (decl) = 1; |
| GFC_DECL_CRAY_POINTEE (decl) = 1; |
| } |
| |
| |
| /* Finish processing of a declaration without an initial value. */ |
| |
| static void |
| gfc_finish_decl (tree decl) |
| { |
| gcc_assert (TREE_CODE (decl) == PARM_DECL |
| || DECL_INITIAL (decl) == NULL_TREE); |
| |
| if (!VAR_P (decl)) |
| return; |
| |
| if (DECL_SIZE (decl) == NULL_TREE |
| && TYPE_SIZE (TREE_TYPE (decl)) != NULL_TREE) |
| layout_decl (decl, 0); |
| |
| /* A few consistency checks. */ |
| /* A static variable with an incomplete type is an error if it is |
| initialized. Also if it is not file scope. Otherwise, let it |
| through, but if it is not `extern' then it may cause an error |
| message later. */ |
| /* An automatic variable with an incomplete type is an error. */ |
| |
| /* We should know the storage size. */ |
| gcc_assert (DECL_SIZE (decl) != NULL_TREE |
| || (TREE_STATIC (decl) |
| ? (!DECL_INITIAL (decl) || !DECL_CONTEXT (decl)) |
| : DECL_EXTERNAL (decl))); |
| |
| /* The storage size should be constant. */ |
| gcc_assert ((!DECL_EXTERNAL (decl) && !TREE_STATIC (decl)) |
| || !DECL_SIZE (decl) |
| || TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST); |
| } |
| |
| |
| /* Handle setting of GFC_DECL_SCALAR* on DECL. */ |
| |
| void |
| gfc_finish_decl_attrs (tree decl, symbol_attribute *attr) |
| { |
| if (!attr->dimension && !attr->codimension) |
| { |
| /* Handle scalar allocatable variables. */ |
| if (attr->allocatable) |
| { |
| gfc_allocate_lang_decl (decl); |
| GFC_DECL_SCALAR_ALLOCATABLE (decl) = 1; |
| } |
| /* Handle scalar pointer variables. */ |
| if (attr->pointer) |
| { |
| gfc_allocate_lang_decl (decl); |
| GFC_DECL_SCALAR_POINTER (decl) = 1; |
| } |
| if (attr->target) |
| { |
| gfc_allocate_lang_decl (decl); |
| GFC_DECL_SCALAR_TARGET (decl) = 1; |
| } |
| } |
| } |
| |
| |
| /* Apply symbol attributes to a variable, and add it to the function scope. */ |
| |
| static void |
| gfc_finish_var_decl (tree decl, gfc_symbol * sym) |
| { |
| tree new_type; |
| |
| /* Set DECL_VALUE_EXPR for Cray Pointees. */ |
| if (sym->attr.cray_pointee) |
| gfc_finish_cray_pointee (decl, sym); |
| |
| /* TREE_ADDRESSABLE means the address of this variable is actually needed. |
| This is the equivalent of the TARGET variables. |
| We also need to set this if the variable is passed by reference in a |
| CALL statement. */ |
| if (sym->attr.target) |
| TREE_ADDRESSABLE (decl) = 1; |
| |
| /* If it wasn't used we wouldn't be getting it. */ |
| TREE_USED (decl) = 1; |
| |
| if (sym->attr.flavor == FL_PARAMETER |
| && (sym->attr.dimension || sym->ts.type == BT_DERIVED)) |
| TREE_READONLY (decl) = 1; |
| |
| /* Chain this decl to the pending declarations. Don't do pushdecl() |
| because this would add them to the current scope rather than the |
| function scope. */ |
| if (current_function_decl != NULL_TREE) |
| { |
| if (sym->ns->proc_name |
| && (sym->ns->proc_name->backend_decl == current_function_decl |
| || sym->result == sym)) |
| gfc_add_decl_to_function (decl); |
| else if (sym->ns->proc_name |
| && sym->ns->proc_name->attr.flavor == FL_LABEL) |
| /* This is a BLOCK construct. */ |
| add_decl_as_local (decl); |
| else if (sym->ns->omp_affinity_iterators) |
| /* This is a block-local iterator. */ |
| add_decl_as_local (decl); |
| else |
| gfc_add_decl_to_parent_function (decl); |
| } |
| |
| if (sym->attr.cray_pointee) |
| return; |
| |
| if(sym->attr.is_bind_c == 1 && sym->binding_label) |
| { |
| /* We need to put variables that are bind(c) into the common |
| segment of the object file, because this is what C would do. |
| gfortran would typically put them in either the BSS or |
| initialized data segments, and only mark them as common if |
| they were part of common blocks. However, if they are not put |
| into common space, then C cannot initialize global Fortran |
| variables that it interoperates with and the draft says that |
| either Fortran or C should be able to initialize it (but not |
| both, of course.) (J3/04-007, section 15.3). */ |
| TREE_PUBLIC(decl) = 1; |
| DECL_COMMON(decl) = 1; |
| if (sym->attr.access == ACCESS_PRIVATE && !sym->attr.public_used) |
| { |
| DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN; |
| DECL_VISIBILITY_SPECIFIED (decl) = true; |
| } |
| } |
| |
| /* If a variable is USE associated, it's always external. */ |
| if (sym->attr.use_assoc || sym->attr.used_in_submodule) |
| { |
| DECL_EXTERNAL (decl) = 1; |
| TREE_PUBLIC (decl) = 1; |
| } |
| else if (sym->fn_result_spec && !sym->ns->proc_name->module) |
| { |
| |
| if (sym->ns->proc_name->attr.if_source != IFSRC_DECL) |
| DECL_EXTERNAL (decl) = 1; |
| else |
| TREE_STATIC (decl) = 1; |
| |
| TREE_PUBLIC (decl) = 1; |
| } |
| else if (sym->module && !sym->attr.result && !sym->attr.dummy) |
| { |
| /* TODO: Don't set sym->module for result or dummy variables. */ |
| gcc_assert (current_function_decl == NULL_TREE || sym->result == sym); |
| |
| TREE_PUBLIC (decl) = 1; |
| TREE_STATIC (decl) = 1; |
| if (sym->attr.access == ACCESS_PRIVATE && !sym->attr.public_used) |
| { |
| DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN; |
| DECL_VISIBILITY_SPECIFIED (decl) = true; |
| } |
| } |
| |
| /* Derived types are a bit peculiar because of the possibility of |
| a default initializer; this must be applied each time the variable |
| comes into scope it therefore need not be static. These variables |
| are SAVE_NONE but have an initializer. Otherwise explicitly |
| initialized variables are SAVE_IMPLICIT and explicitly saved are |
| SAVE_EXPLICIT. */ |
| if (!sym->attr.use_assoc |
| && (sym->attr.save != SAVE_NONE || sym->attr.data |
| || (sym->value && sym->ns->proc_name->attr.is_main_program) |
| || (flag_coarray == GFC_FCOARRAY_LIB |
| && sym->attr.codimension && !sym->attr.allocatable))) |
| TREE_STATIC (decl) = 1; |
| |
| /* If derived-type variables with DTIO procedures are not made static |
| some bits of code referencing them get optimized away. |
| TODO Understand why this is so and fix it. */ |
| if (!sym->attr.use_assoc |
| && ((sym->ts.type == BT_DERIVED |
| && sym->ts.u.derived->attr.has_dtio_procs) |
| || (sym->ts.type == BT_CLASS |
| && CLASS_DATA (sym)->ts.u.derived->attr.has_dtio_procs))) |
| TREE_STATIC (decl) = 1; |
| |
| /* Treat asynchronous variables the same as volatile, for now. */ |
| if (sym->attr.volatile_ || sym->attr.asynchronous) |
| { |
| TREE_THIS_VOLATILE (decl) = 1; |
| TREE_SIDE_EFFECTS (decl) = 1; |
| new_type = build_qualified_type (TREE_TYPE (decl), TYPE_QUAL_VOLATILE); |
| TREE_TYPE (decl) = new_type; |
| } |
| |
| /* Keep variables larger than max-stack-var-size off stack. */ |
| if (!(sym->ns->proc_name && sym->ns->proc_name->attr.recursive) |
| && !sym->attr.automatic |
| && sym->attr.save != SAVE_EXPLICIT |
| && sym->attr.save != SAVE_IMPLICIT |
| && INTEGER_CST_P (DECL_SIZE_UNIT (decl)) |
| && !gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl)) |
| /* Put variable length auto array pointers always into stack. */ |
| && (TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE |
| || sym->attr.dimension == 0 |
| || sym->as->type != AS_EXPLICIT |
| || sym->attr.pointer |
| || sym->attr.allocatable) |
| && !DECL_ARTIFICIAL (decl)) |
| { |
| if (flag_max_stack_var_size > 0 |
| && !(sym->ns->proc_name |
| && sym->ns->proc_name->attr.is_main_program)) |
| gfc_warning (OPT_Wsurprising, |
| "Array %qs at %L is larger than limit set by " |
| "%<-fmax-stack-var-size=%>, moved from stack to static " |
| "storage. This makes the procedure unsafe when called " |
| "recursively, or concurrently from multiple threads. " |
| "Consider increasing the %<-fmax-stack-var-size=%> " |
| "limit (or use %<-frecursive%>, which implies " |
| "unlimited %<-fmax-stack-var-size%>) - or change the " |
| "code to use an ALLOCATABLE array. If the variable is " |
| "never accessed concurrently, this warning can be " |
| "ignored, and the variable could also be declared with " |
| "the SAVE attribute.", |
| sym->name, &sym->declared_at); |
| |
| TREE_STATIC (decl) = 1; |
| |
| /* Because the size of this variable isn't known until now, we may have |
| greedily added an initializer to this variable (in build_init_assign) |
| even though the max-stack-var-size indicates the variable should be |
| static. Therefore we rip out the automatic initializer here and |
| replace it with a static one. */ |
| gfc_symtree *st = gfc_find_symtree (sym->ns->sym_root, sym->name); |
| gfc_code *prev = NULL; |
| gfc_code *code = sym->ns->code; |
| while (code && code->op == EXEC_INIT_ASSIGN) |
| { |
| /* Look for an initializer meant for this symbol. */ |
| if (code->expr1->symtree == st) |
| { |
| if (prev) |
| prev->next = code->next; |
| else |
| sym->ns->code = code->next; |
| |
| break; |
| } |
| |
| prev = code; |
| code = code->next; |
| } |
| if (code && code->op == EXEC_INIT_ASSIGN) |
| { |
| /* Keep the init expression for a static initializer. */ |
| sym->value = code->expr2; |
| /* Cleanup the defunct code object, without freeing the init expr. */ |
| code->expr2 = NULL; |
| gfc_free_statement (code); |
| free (code); |
| } |
| } |
| |
| /* Handle threadprivate variables. */ |
| if (sym->attr.threadprivate |
| && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) |
| set_decl_tls_model (decl, decl_default_tls_model (decl)); |
| |
| gfc_finish_decl_attrs (decl, &sym->attr); |
| } |
| |
| |
| /* Allocate the lang-specific part of a decl. */ |
| |
| void |
| gfc_allocate_lang_decl (tree decl) |
| { |
| if (DECL_LANG_SPECIFIC (decl) == NULL) |
| DECL_LANG_SPECIFIC (decl) = ggc_cleared_alloc<struct lang_decl> (); |
| } |
| |
| /* Remember a symbol to generate initialization/cleanup code at function |
| entry/exit. */ |
| |
| static void |
| gfc_defer_symbol_init (gfc_symbol * sym) |
| { |
| gfc_symbol *p; |
| gfc_symbol *last; |
| gfc_symbol *head; |
| |
| /* Don't add a symbol twice. */ |
| if (sym->tlink) |
| return; |
| |
| last = head = sym->ns->proc_name; |
| p = last->tlink; |
| |
| /* Make sure that setup code for dummy variables which are used in the |
| setup of other variables is generated first. */ |
| if (sym->attr.dummy) |
| { |
| /* Find the first dummy arg seen after us, or the first non-dummy arg. |
| This is a circular list, so don't go past the head. */ |
| while (p != head |
| && (!p->attr.dummy || p->dummy_order > sym->dummy_order)) |
| { |
| last = p; |
| p = p->tlink; |
| } |
| } |
| /* Insert in between last and p. */ |
| last->tlink = sym; |
| sym->tlink = p; |
| } |
| |
| |
| /* Used in gfc_get_symbol_decl and gfc_get_derived_type to obtain the |
| backend_decl for a module symbol, if it all ready exists. If the |
| module gsymbol does not exist, it is created. If the symbol does |
| not exist, it is added to the gsymbol namespace. Returns true if |
| an existing backend_decl is found. */ |
| |
| bool |
| gfc_get_module_backend_decl (gfc_symbol *sym) |
| { |
| gfc_gsymbol *gsym; |
| gfc_symbol *s; |
| gfc_symtree *st; |
| |
| gsym = gfc_find_gsymbol (gfc_gsym_root, sym->module); |
| |
| if (!gsym || (gsym->ns && gsym->type == GSYM_MODULE)) |
| { |
| st = NULL; |
| s = NULL; |
| |
| /* Check for a symbol with the same name. */ |
| if (gsym) |
| gfc_find_symbol (sym->name, gsym->ns, 0, &s); |
| |
| if (!s) |
| { |
| if (!gsym) |
| { |
| gsym = gfc_get_gsymbol (sym->module, false); |
| gsym->type = GSYM_MODULE; |
| gsym->ns = gfc_get_namespace (NULL, 0); |
| } |
| |
| st = gfc_new_symtree (&gsym->ns->sym_root, sym->name); |
| st->n.sym = sym; |
| sym->refs++; |
| } |
| else if (gfc_fl_struct (sym->attr.flavor)) |
| { |
| if (s && s->attr.flavor == FL_PROCEDURE) |
| { |
| gfc_interface *intr; |
| gcc_assert (s->attr.generic); |
| for (intr = s->generic; intr; intr = intr->next) |
| if (gfc_fl_struct (intr->sym->attr.flavor)) |
| { |
| s = intr->sym; |
| break; |
| } |
| } |
| |
| /* Normally we can assume that s is a derived-type symbol since it |
| shares a name with the derived-type sym. However if sym is a |
| STRUCTURE, it may in fact share a name with any other basic type |
| variable. If s is in fact of derived type then we can continue |
| looking for a duplicate type declaration. */ |
| if (sym->attr.flavor == FL_STRUCT && s->ts.type == BT_DERIVED) |
| { |
| s = s->ts.u.derived; |
| } |
| |
| if (gfc_fl_struct (s->attr.flavor) && !s->backend_decl) |
| { |
| if (s->attr.flavor == FL_UNION) |
| s->backend_decl = gfc_get_union_type (s); |
| else |
| s->backend_decl = gfc_get_derived_type (s); |
| } |
| gfc_copy_dt_decls_ifequal (s, sym, true); |
| return true; |
| } |
| else if (s->backend_decl) |
| { |
| if (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS) |
| gfc_copy_dt_decls_ifequal (s->ts.u.derived, sym->ts.u.derived, |
| true); |
| else if (sym->ts.type == BT_CHARACTER) |
| sym->ts.u.cl->backend_decl = s->ts.u.cl->backend_decl; |
| sym->backend_decl = s->backend_decl; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| |
| /* Create an array index type variable with function scope. */ |
| |
| static tree |
| create_index_var (const char * pfx, int nest) |
| { |
| tree decl; |
| |
| decl = gfc_create_var_np (gfc_array_index_type, pfx); |
| if (nest) |
| gfc_add_decl_to_parent_function (decl); |
| else |
| gfc_add_decl_to_function (decl); |
| return decl; |
| } |
| |
| |
| /* Create variables to hold all the non-constant bits of info for a |
| descriptorless array. Remember these in the lang-specific part of the |
| type. */ |
| |
| static void |
| gfc_build_qualified_array (tree decl, gfc_symbol * sym) |
| { |
| tree type; |
| int dim; |
| int nest; |
| gfc_namespace* procns; |
| symbol_attribute *array_attr; |
| gfc_array_spec *as; |
| bool is_classarray = IS_CLASS_ARRAY (sym); |
| |
| type = TREE_TYPE (decl); |
| array_attr = is_classarray ? &CLASS_DATA (sym)->attr : &sym->attr; |
| as = is_classarray ? CLASS_DATA (sym)->as : sym->as; |
| |
| /* We just use the descriptor, if there is one. */ |
| if (GFC_DESCRIPTOR_TYPE_P (type)) |
| return; |
| |
| gcc_assert (GFC_ARRAY_TYPE_P (type)); |
| procns = gfc_find_proc_namespace (sym->ns); |
| nest = (procns->proc_name->backend_decl != current_function_decl) |
| && !sym->attr.contained; |
| |
| if (array_attr->codimension && flag_coarray == GFC_FCOARRAY_LIB |
| && as->type != AS_ASSUMED_SHAPE |
| && GFC_TYPE_ARRAY_CAF_TOKEN (type) == NULL_TREE) |
| { |
| tree token; |
| tree token_type = build_qualified_type (pvoid_type_node, |
| TYPE_QUAL_RESTRICT); |
| |
| if (sym->module && (sym->attr.use_assoc |
| || sym->ns->proc_name->attr.flavor == FL_MODULE)) |
| { |
| tree token_name |
| = get_identifier (gfc_get_string (GFC_PREFIX ("caf_token%s"), |
| IDENTIFIER_POINTER (gfc_sym_mangled_identifier (sym)))); |
| token = build_decl (DECL_SOURCE_LOCATION (decl), VAR_DECL, token_name, |
| token_type); |
| if (sym->attr.use_assoc) |
| DECL_EXTERNAL (token) = 1; |
| else |
| TREE_STATIC (token) = 1; |
| |
| TREE_PUBLIC (token) = 1; |
| |
| if (sym->attr.access == ACCESS_PRIVATE && !sym->attr.public_used) |
| { |
| DECL_VISIBILITY (token) = VISIBILITY_HIDDEN; |
| DECL_VISIBILITY_SPECIFIED (token) = true; |
| } |
| } |
| else |
| { |
| token = gfc_create_var_np (token_type, "caf_token"); |
| TREE_STATIC (token) = 1; |
| } |
| |
| GFC_TYPE_ARRAY_CAF_TOKEN (type) = token; |
| DECL_ARTIFICIAL (token) = 1; |
| DECL_NONALIASED (token) = 1; |
| |
| if (sym->module && !sym->attr.use_assoc) |
| { |
| pushdecl (token); |
| DECL_CONTEXT (token) = sym->ns->proc_name->backend_decl; |
| gfc_module_add_decl (cur_module, token); |
| } |
| else if (sym->attr.host_assoc |
| && TREE_CODE (DECL_CONTEXT (current_function_decl)) |
| != TRANSLATION_UNIT_DECL) |
| gfc_add_decl_to_parent_function (token); |
| else |
| gfc_add_decl_to_function (token); |
| } |
| |
| for (dim = 0; dim < GFC_TYPE_ARRAY_RANK (type); dim++) |
| { |
| if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE) |
| { |
| GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest); |
| suppress_warning (GFC_TYPE_ARRAY_LBOUND (type, dim)); |
| } |
| /* Don't try to use the unknown bound for assumed shape arrays. */ |
| if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE |
| && (as->type != AS_ASSUMED_SIZE |
| || dim < GFC_TYPE_ARRAY_RANK (type) - 1)) |
| { |
| GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest); |
| suppress_warning (GFC_TYPE_ARRAY_UBOUND (type, dim)); |
| } |
| |
| if (GFC_TYPE_ARRAY_STRIDE (type, dim) == NULL_TREE) |
| { |
| GFC_TYPE_ARRAY_STRIDE (type, dim) = create_index_var ("stride", nest); |
| suppress_warning (GFC_TYPE_ARRAY_STRIDE (type, dim)); |
| } |
| } |
| for (dim = GFC_TYPE_ARRAY_RANK (type); |
| dim < GFC_TYPE_ARRAY_RANK (type) + GFC_TYPE_ARRAY_CORANK (type); dim++) |
| { |
| if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE) |
| { |
| GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest); |
| suppress_warning (GFC_TYPE_ARRAY_LBOUND (type, dim)); |
| } |
| /* Don't try to use the unknown ubound for the last coarray dimension. */ |
| if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE |
| && dim < GFC_TYPE_ARRAY_RANK (type) + GFC_TYPE_ARRAY_CORANK (type) - 1) |
| { |
| GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest); |
| suppress_warning (GFC_TYPE_ARRAY_UBOUND (type, dim)); |
| } |
| } |
| if (GFC_TYPE_ARRAY_OFFSET (type) == NULL_TREE) |
| { |
| GFC_TYPE_ARRAY_OFFSET (type) = gfc_create_var_np (gfc_array_index_type, |
| "offset"); |
| suppress_warning (GFC_TYPE_ARRAY_OFFSET (type)); |
| |
| if (nest) |
| gfc_add_decl_to_parent_function (GFC_TYPE_ARRAY_OFFSET (type)); |
| else |
| gfc_add_decl_to_function (GFC_TYPE_ARRAY_OFFSET (type)); |
| } |
| |
| if (GFC_TYPE_ARRAY_SIZE (type) == NULL_TREE |
| && as->type != AS_ASSUMED_SIZE) |
| { |
| GFC_TYPE_ARRAY_SIZE (type) = create_index_var ("size", nest); |
| suppress_warning (GFC_TYPE_ARRAY_SIZE (type)); |
| } |
| |
| if (POINTER_TYPE_P (type)) |
| { |
| gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (type))); |
| gcc_assert (TYPE_LANG_SPECIFIC (type) |
| == TYPE_LANG_SPECIFIC (TREE_TYPE (type))); |
| type = TREE_TYPE (type); |
| } |
| |
| if (! COMPLETE_TYPE_P (type) && GFC_TYPE_ARRAY_SIZE (type)) |
| { |
| tree size, range; |
| |
| size = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type, |
| GFC_TYPE_ARRAY_SIZE (type), gfc_index_one_node); |
| range = build_range_type (gfc_array_index_type, gfc_index_zero_node, |
| size); |
| TYPE_DOMAIN (type) = range; |
| layout_type (type); |
| } |
| |
| if (TYPE_NAME (type) != NULL_TREE && as->rank > 0 |
| && GFC_TYPE_ARRAY_UBOUND (type, as->rank - 1) != NULL_TREE |
| && VAR_P (GFC_TYPE_ARRAY_UBOUND (type, as->rank - 1))) |
| { |
| tree gtype = DECL_ORIGINAL_TYPE (TYPE_NAME (type)); |
| |
| for (dim = 0; dim < as->rank - 1; dim++) |
| { |
| gcc_assert (TREE_CODE (gtype) == ARRAY_TYPE); |
| gtype = TREE_TYPE (gtype); |
| } |
| gcc_assert (TREE_CODE (gtype) == ARRAY_TYPE); |
| if (TYPE_MAX_VALUE (TYPE_DOMAIN (gtype)) == NULL) |
| TYPE_NAME (type) = NULL_TREE; |
| } |
| |
| if (TYPE_NAME (type) == NULL_TREE) |
| { |
| tree gtype = TREE_TYPE (type), rtype, type_decl; |
| |
| for (dim = as->rank - 1; dim >= 0; dim--) |
| { |
| tree lbound, ubound; |
| lbound = GFC_TYPE_ARRAY_LBOUND (type, dim); |
| ubound = GFC_TYPE_ARRAY_UBOUND (type, dim); |
| rtype = build_range_type (gfc_array_index_type, lbound, ubound); |
| gtype = build_array_type (gtype, rtype); |
| /* Ensure the bound variables aren't optimized out at -O0. |
| For -O1 and above they often will be optimized out, but |
| can be tracked by VTA. Also set DECL_NAMELESS, so that |
| the artificial lbound.N or ubound.N DECL_NAME doesn't |
| end up in debug info. */ |
| if (lbound |
| && VAR_P (lbound) |
| && DECL_ARTIFICIAL (lbound) |
| && DECL_IGNORED_P (lbound)) |
| { |
| if (DECL_NAME (lbound) |
| && strstr (IDENTIFIER_POINTER (DECL_NAME (lbound)), |
| "lbound") != 0) |
| DECL_NAMELESS (lbound) = 1; |
| DECL_IGNORED_P (lbound) = 0; |
| } |
| if (ubound |
| && VAR_P (ubound) |
| && DECL_ARTIFICIAL (ubound) |
| && DECL_IGNORED_P (ubound)) |
| { |
| if (DECL_NAME (ubound) |
| && strstr (IDENTIFIER_POINTER (DECL_NAME (ubound)), |
| "ubound") != 0) |
| DECL_NAMELESS (ubound) = 1; |
| DECL_IGNORED_P (ubound) = 0; |
| } |
| } |
| TYPE_NAME (type) = type_decl = build_decl (input_location, |
| TYPE_DECL, NULL, gtype); |
| DECL_ORIGINAL_TYPE (type_decl) = gtype; |
| } |
| } |
| |
| |
| /* For some dummy arguments we don't use the actual argument directly. |
| Instead we create a local decl and use that. This allows us to perform |
| initialization, and construct full type information. */ |
| |
| static tree |
| gfc_build_dummy_array_decl (gfc_symbol * sym, tree dummy) |
| { |
| tree decl; |
| tree type; |
| gfc_array_spec *as; |
| symbol_attribute *array_attr; |
| char *name; |
| gfc_packed packed; |
| int n; |
| bool known_size; |
| bool is_classarray = IS_CLASS_ARRAY (sym); |
| |
| /* Use the array as and attr. */ |
| as = is_classarray ? CLASS_DATA (sym)->as : sym->as; |
| array_attr = is_classarray ? &CLASS_DATA (sym)->attr : &sym->attr; |
| |
| /* The dummy is returned for pointer, allocatable or assumed rank arrays. |
| For class arrays the information if sym is an allocatable or pointer |
| object needs to be checked explicitly (IS_CLASS_ARRAY can be false for |
| too many reasons to be of use here). */ |
| if ((sym->ts.type != BT_CLASS && sym->attr.pointer) |
| || (sym->ts.type == BT_CLASS && CLASS_DATA (sym)->attr.class_pointer) |
| || array_attr->allocatable |
| || (as && as->type == AS_ASSUMED_RANK)) |
| return dummy; |
| |
| /* Add to list of variables if not a fake result variable. |
| These symbols are set on the symbol only, not on the class component. */ |
| if (sym->attr.result || sym->attr.dummy) |
| gfc_defer_symbol_init (sym); |
| |
| /* For a class array the array descriptor is in the _data component, while |
| for a regular array the TREE_TYPE of the dummy is a pointer to the |
| descriptor. */ |
| type = TREE_TYPE (is_classarray ? gfc_class_data_get (dummy) |
| : TREE_TYPE (dummy)); |
| /* type now is the array descriptor w/o any indirection. */ |
| gcc_assert (TREE_CODE (dummy) == PARM_DECL |
| && POINTER_TYPE_P (TREE_TYPE (dummy))); |
| |
| /* Do we know the element size? */ |
| known_size = sym->ts.type != BT_CHARACTER |
| || INTEGER_CST_P (sym->ts.u.cl->backend_decl); |
| |
| if (known_size && !GFC_DESCRIPTOR_TYPE_P (type)) |
| { |
| /* For descriptorless arrays with known element size the actual |
| argument is sufficient. */ |
| gfc_build_qualified_array (dummy, sym); |
| return dummy; |
| } |
| |
| if (GFC_DESCRIPTOR_TYPE_P (type)) |
| { |
| /* Create a descriptorless array pointer. */ |
| packed = PACKED_NO; |
| |
| /* Even when -frepack-arrays is used, symbols with TARGET attribute |
| are not repacked. */ |
| if (!flag_repack_arrays || sym->attr.target) |
| { |
| if (as->type == AS_ASSUMED_SIZE) |
| packed = PACKED_FULL; |
| } |
| else |
| { |
| if (as->type == AS_EXPLICIT) |
| { |
| packed = PACKED_FULL; |
| for (n = 0; n < as->rank; n++) |
| { |
| if (!(as->upper[n] |
| && as->lower[n] |
| && as->upper[n]->expr_type == EXPR_CONSTANT |
| && as->lower[n]->expr_type == EXPR_CONSTANT)) |
| { |
| packed = PACKED_PARTIAL; |
| break; |
| } |
| } |
| } |
| else |
| packed = PACKED_PARTIAL; |
| } |
| |
| /* For classarrays the element type is required, but |
| gfc_typenode_for_spec () returns the array descriptor. */ |
| type = is_classarray ? gfc_get_element_type (type) |
| : gfc_typenode_for_spec (&sym->ts); |
| type = gfc_get_nodesc_array_type (type, as, packed, |
| !sym->attr.target); |
| } |
| else |
| { |
| /* We now have an expression for the element size, so create a fully |
| qualified type. Reset sym->backend decl or this will just return the |
| old type. */ |
| DECL_ARTIFICIAL (sym->backend_decl) = 1; |
| sym->backend_decl = NULL_TREE; |
| type = gfc_sym_type (sym); |
| packed = PACKED_FULL; |
| } |
| |
| ASM_FORMAT_PRIVATE_NAME (name, IDENTIFIER_POINTER (DECL_NAME (dummy)), 0); |
| decl = build_decl (input_location, |
| VAR_DECL, get_identifier (name), type); |
| |
| DECL_ARTIFICIAL (decl) = 1; |
| DECL_NAMELESS (decl) = 1; |
| TREE_PUBLIC (decl) = 0; |
| TREE_STATIC (decl) = 0; |
| DECL_EXTERNAL (decl) = 0; |
| |
| /* Avoid uninitialized warnings for optional dummy arguments. */ |
| if ((sym->ts.type == BT_CLASS && CLASS_DATA (sym)->attr.optional) |
| || sym->attr.optional) |
| suppress_warning (decl); |
| |
| /* We should never get deferred shape arrays here. We used to because of |
| frontend bugs. */ |
| gcc_assert (as->type != AS_DEFERRED); |
| |
| if (packed == PACKED_PARTIAL) |
| GFC_DECL_PARTIAL_PACKED_ARRAY (decl) = 1; |
| else if (packed == PACKED_FULL) |
| GFC_DECL_PACKED_ARRAY (decl) = 1; |
| |
| gfc_build_qualified_array (decl, sym); |
| |
| if (DECL_LANG_SPECIFIC (dummy)) |
| DECL_LANG_SPECIFIC (decl) = DECL_LANG_SPECIFIC (dummy); |
| else |
| gfc_allocate_lang_decl (decl); |
| |
| GFC_DECL_SAVED_DESCRIPTOR (decl) = dummy; |
| |
| if (sym->ns->proc_name->backend_decl == current_function_decl |
| || sym->attr.contained) |
| gfc_add_decl_to_function (decl); |
| else |
| gfc_add_decl_to_parent_function (decl); |
| |
| return decl; |
| } |
| |
| /* Return a constant or a variable to use as a string length. Does not |
| add the decl to the current scope. */ |
| |
| static tree |
| gfc_create_string_length (gfc_symbol * sym) |
| { |
| gcc_assert (sym->ts.u.cl); |
| gfc_conv_const_charlen (sym->ts.u.cl); |
| |
| if (sym->ts.u.cl->backend_decl == NULL_TREE) |
| { |
| tree length; |
| const char *name; |
| |
| /* The string length variable shall be in static memory if it is either |
| explicitly SAVED, a module variable or with -fno-automatic. Only |
| relevant is "len=:" - otherwise, it is either a constant length or |
| it is an automatic variable. */ |
| bool static_length = sym->attr.save |
| || sym->ns->proc_name->attr.flavor == FL_MODULE |
| || (flag_max_stack_var_size == 0 |
| && sym->ts.deferred && !sym->attr.dummy |
| && !sym->attr.result && !sym->attr.function); |
| |
| /* Also prefix the mangled name. We need to call GFC_PREFIX for static |
| variables as some systems do not support the "." in the assembler name. |
| For nonstatic variables, the "." does not appear in assembler. */ |
| if (static_length) |
| { |
| if (sym->module) |
| name = gfc_get_string (GFC_PREFIX ("%s_MOD_%s"), sym->module, |
| sym->name); |
| else |
| name = gfc_get_string (GFC_PREFIX ("%s"), sym->name); |
| } |
| else if (sym->module) |
| name = gfc_get_string (".__%s_MOD_%s", sym->module, sym->name); |
| else |
| name = gfc_get_string (".%s", sym->name); |
| |
| length = build_decl (input_location, |
| VAR_DECL, get_identifier (name), |
| gfc_charlen_type_node); |
| DECL_ARTIFICIAL (length) = 1; |
| TREE_USED (length) = 1; |
| if (sym->ns->proc_name->tlink != NULL) |
| gfc_defer_symbol_init (sym); |
| |
| sym->ts.u.cl->backend_decl = length; |
| |
| if (static_length) |
| TREE_STATIC (length) = 1; |
| |
| if (sym->ns->proc_name->attr.flavor == FL_MODULE |
| && (sym->attr.access != ACCESS_PRIVATE || sym->attr.public_used)) |
| TREE_PUBLIC (length) = 1; |
| } |
| |
| gcc_assert (sym->ts.u.cl->backend_decl != NULL_TREE); |
| return sym->ts.u.cl->backend_decl; |
| } |
| |
| /* If a variable is assigned a label, we add another two auxiliary |
| variables. */ |
| |
| static void |
| gfc_add_assign_aux_vars (gfc_symbol * sym) |
| { |
| tree addr; |
| tree length; |
| tree decl; |
| |
| gcc_assert (sym->backend_decl); |
| |
| decl = sym->backend_decl; |
| gfc_allocate_lang_decl (decl); |
| GFC_DECL_ASSIGN (decl) = 1; |
| length = build_decl (input_location, |
| VAR_DECL, create_tmp_var_name (sym->name), |
| gfc_charlen_type_node); |
| addr = build_decl (input_location, |
| VAR_DECL, create_tmp_var_name (sym->name), |
| pvoid_type_node); |
| gfc_finish_var_decl (length, sym); |
| gfc_finish_var_decl (addr, sym); |
| /* STRING_LENGTH is also used as flag. Less than -1 means that |
| ASSIGN_ADDR cannot be used. Equal -1 means that ASSIGN_ADDR is the |
| target label's address. Otherwise, value is the length of a format string |
| and ASSIGN_ADDR is its address. */ |
| if (TREE_STATIC (length)) |
| DECL_INITIAL (length) = build_int_cst (gfc_charlen_type_node, -2); |
| else |
| gfc_defer_symbol_init (sym); |
| |
| GFC_DECL_STRING_LEN (decl) = length; |
| GFC_DECL_ASSIGN_ADDR (decl) = addr; |
| } |
| |
| |
| static tree |
| add_attributes_to_decl (symbol_attribute sym_attr, tree list) |
| { |
| unsigned id; |
| tree attr; |
| |
| for (id = 0; id < EXT_ATTR_NUM; id++) |
| if (sym_attr.ext_attr & (1 << id) && ext_attr_list[id].middle_end_name) |
| { |
| attr = build_tree_list ( |
| get_identifier (ext_attr_list[id].middle_end_name), |
| NULL_TREE); |
| list = chainon (list, attr); |
| } |
| |
| tree clauses = NULL_TREE; |
| |
| if (sym_attr.oacc_routine_lop != OACC_ROUTINE_LOP_NONE) |
| { |
| omp_clause_code code; |
| switch (sym_attr.oacc_routine_lop) |
| { |
| case OACC_ROUTINE_LOP_GANG: |
| code = OMP_CLAUSE_GANG; |
| break; |
| case OACC_ROUTINE_LOP_WORKER: |
| code = OMP_CLAUSE_WORKER; |
| break; |
| case OACC_ROUTINE_LOP_VECTOR: |
| code = OMP_CLAUSE_VECTOR; |
| break; |
| case OACC_ROUTINE_LOP_SEQ: |
| code = OMP_CLAUSE_SEQ; |
| break; |
| case OACC_ROUTINE_LOP_NONE: |
| case OACC_ROUTINE_LOP_ERROR: |
| default: |
| gcc_unreachable (); |
| } |
| tree c = build_omp_clause (UNKNOWN_LOCATION, code); |
| OMP_CLAUSE_CHAIN (c) = clauses; |
| clauses = c; |
| |
| tree dims = oacc_build_routine_dims (clauses); |
| list = oacc_replace_fn_attrib_attr (list, dims); |
| } |
| |
| if (sym_attr.oacc_routine_nohost) |
| { |
| tree c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_NOHOST); |
| OMP_CLAUSE_CHAIN (c) = clauses; |
| clauses = c; |
| } |
| |
| if (sym_attr.omp_device_type != OMP_DEVICE_TYPE_UNSET) |
| { |
| tree c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_DEVICE_TYPE); |
| switch (sym_attr.omp_device_type) |
| { |
| case OMP_DEVICE_TYPE_HOST: |
| OMP_CLAUSE_DEVICE_TYPE_KIND (c) = OMP_CLAUSE_DEVICE_TYPE_HOST; |
| break; |
| case OMP_DEVICE_TYPE_NOHOST: |
| OMP_CLAUSE_DEVICE_TYPE_KIND (c) = OMP_CLAUSE_DEVICE_TYPE_NOHOST; |
| break; |
| case OMP_DEVICE_TYPE_ANY: |
| OMP_CLAUSE_DEVICE_TYPE_KIND (c) = OMP_CLAUSE_DEVICE_TYPE_ANY; |
| break; |
| default: |
| gcc_unreachable (); |
| } |
| OMP_CLAUSE_CHAIN (c) = clauses; |
| clauses = c; |
| } |
| |
| if (sym_attr.omp_declare_target_link |
| || sym_attr.oacc_declare_link) |
| list = tree_cons (get_identifier ("omp declare target link"), |
| clauses, list); |
| else if (sym_attr.omp_declare_target |
| || sym_attr.oacc_declare_create |
| || sym_attr.oacc_declare_copyin |
| || sym_attr.oacc_declare_deviceptr |
| || sym_attr.oacc_declare_device_resident) |
| list = tree_cons (get_identifier ("omp declare target"), |
| clauses, list); |
| |
| return list; |
| } |
| |
| |
| static void build_function_decl (gfc_symbol * sym, bool global); |
| |
| |
| /* Return the decl for a gfc_symbol, create it if it doesn't already |
| exist. */ |
| |
| tree |
| gfc_get_symbol_decl (gfc_symbol * sym) |
| { |
| tree decl; |
| tree length = NULL_TREE; |
| tree attributes; |
| int byref; |
| bool intrinsic_array_parameter = false; |
| bool fun_or_res; |
| |
| gcc_assert (sym->attr.referenced |
| || sym->attr.flavor == FL_PROCEDURE |
| || sym->attr.use_assoc |
| || sym->attr.used_in_submodule |
| || sym->ns->proc_name->attr.if_source == IFSRC_IFBODY |
| || (sym->module && sym->attr.if_source != IFSRC_DECL |
| && sym->backend_decl)); |
| |
| if (sym->attr.dummy && sym->ns->proc_name->attr.is_bind_c |
| && is_CFI_desc (sym, NULL)) |
| { |
| gcc_assert (sym->backend_decl && (sym->ts.type != BT_CHARACTER |
| || sym->ts.u.cl->backend_decl)); |
| return sym->backend_decl; |
| } |
| |
| if (sym->ns && sym->ns->proc_name && sym->ns->proc_name->attr.function) |
| byref = gfc_return_by_reference (sym->ns->proc_name); |
| else |
| byref = 0; |
| |
| /* Make sure that the vtab for the declared type is completed. */ |
| if (sym->ts.type == BT_CLASS) |
| { |
| gfc_component *c = CLASS_DATA (sym); |
| if (!c->ts.u.derived->backend_decl) |
| { |
| gfc_find_derived_vtab (c->ts.u.derived); |
| gfc_get_derived_type (sym->ts.u.derived); |
| } |
| } |
| |
| /* PDT parameterized array components and string_lengths must have the |
| 'len' parameters substituted for the expressions appearing in the |
| declaration of the entity and memory allocated/deallocated. */ |
| if ((sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS) |
| && sym->param_list != NULL |
| && gfc_current_ns == sym->ns |
| && !(sym->attr.use_assoc || sym->attr.dummy)) |
| gfc_defer_symbol_init (sym); |
| |
| /* Dummy PDT 'len' parameters should be checked when they are explicit. */ |
| if ((sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS) |
| && (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS) |
| && sym->param_list != NULL |
| && sym->attr.dummy) |
| gfc_defer_symbol_init (sym); |
| |
| /* All deferred character length procedures need to retain the backend |
| decl, which is a pointer to the character length in the caller's |
| namespace and to declare a local character length. */ |
| if (!byref && sym->attr.function |
| && sym->ts.type == BT_CHARACTER |
| && sym->ts.deferred |
| && sym->ts.u.cl->passed_length == NULL |
| && sym->ts.u.cl->backend_decl |
| && TREE_CODE (sym->ts.u.cl->backend_decl) == PARM_DECL) |
| { |
| sym->ts.u.cl->passed_length = sym->ts.u.cl->backend_decl; |
| gcc_assert (POINTER_TYPE_P (TREE_TYPE (sym->ts.u.cl->passed_length))); |
| sym->ts.u.cl->backend_decl = build_fold_indirect_ref (sym->ts.u.cl->backend_decl); |
| } |
| |
| fun_or_res = byref && (sym->attr.result |
| || (sym->attr.function && sym->ts.deferred)); |
| if ((sym->attr.dummy && ! sym->attr.function) || fun_or_res) |
| { |
| /* Return via extra parameter. */ |
| if (sym->attr.result && byref |
| && !sym->backend_decl) |
| { |
| sym->backend_decl = |
| DECL_ARGUMENTS (sym->ns->proc_name->backend_decl); |
| /* For entry master function skip over the __entry |
| argument. */ |
| if (sym->ns->proc_name->attr.entry_master) |
| sym->backend_decl = DECL_CHAIN (sym->backend_decl); |
| } |
| |
| /* Dummy variables should already have been created. */ |
| gcc_assert (sym->backend_decl); |
| |
| /* However, the string length of deferred arrays must be set. */ |
| if (sym->ts.type == BT_CHARACTER |
| && sym->ts.deferred |
| && sym->attr.dimension |
| && sym->attr.allocatable) |
| gfc_defer_symbol_init (sym); |
| |
| if (sym->attr.pointer && sym->attr.dimension && sym->ts.type != BT_CLASS) |
| GFC_DECL_PTR_ARRAY_P (sym->backend_decl) = 1; |
| |
| /* Create a character length variable. */ |
| if (sym->ts.type == BT_CHARACTER) |
| { |
| /* For a deferred dummy, make a new string length variable. */ |
| if (sym->ts.deferred |
| && |
| (sym->ts.u.cl->passed_length == sym->ts.u.cl->backend_decl)) |
| sym->ts.u.cl->backend_decl = NULL_TREE; |
| |
| if (sym->ts.deferred && byref) |
| { |
| /* The string length of a deferred char array is stored in the |
| parameter at sym->ts.u.cl->backend_decl as a reference and |
| marked as a result. Exempt this variable from generating a |
| temporary for it. */ |
| if (sym->attr.result) |
| { |
| /* We need to insert a indirect ref for param decls. */ |
| if (sym->ts.u.cl->backend_decl |
| && TREE_CODE (sym->ts.u.cl->backend_decl) == PARM_DECL) |
| { |
| sym->ts.u.cl->passed_length = sym->ts.u.cl->backend_decl; |
| sym->ts.u.cl->backend_decl = |
| build_fold_indirect_ref (sym->ts.u.cl->backend_decl); |
| } |
| } |
| /* For all other parameters make sure, that they are copied so |
| that the value and any modifications are local to the routine |
| by generating a temporary variable. */ |
| else if (sym->attr.function |
| && sym->ts.u.cl->passed_length == NULL |
| && sym->ts.u.cl->backend_decl) |
| { |
| sym->ts.u.cl->passed_length = sym->ts.u.cl->backend_decl; |
| if (POINTER_TYPE_P (TREE_TYPE (sym->ts.u.cl->passed_length))) |
| sym->ts.u.cl->backend_decl |
| = build_fold_indirect_ref (sym->ts.u.cl->backend_decl); |
| else |
| sym->ts.u.cl->backend_decl = NULL_TREE; |
| } |
| } |
| |
| if (sym->ts.u.cl->backend_decl == NULL_TREE) |
| length = gfc_create_string_length (sym); |
| else |
| length = sym->ts.u.cl->backend_decl; |
| if (VAR_P (length) && DECL_FILE_SCOPE_P (length)) |
| { |
| /* Add the string length to the same context as the symbol. */ |
| if (DECL_CONTEXT (length) == NULL_TREE) |
| { |
| if (sym->backend_decl == current_function_decl |
| || (DECL_CONTEXT (sym->backend_decl) |
| == current_function_decl)) |
| gfc_add_decl_to_function (length); |
| else |
| gfc_add_decl_to_parent_function (length); |
| } |
| |
| gcc_assert (sym->backend_decl == current_function_decl |
| ? DECL_CONTEXT (length) == current_function_decl |
| : (DECL_CONTEXT (sym->backend_decl) |
| == DECL_CONTEXT (length))); |
| |
| gfc_defer_symbol_init (sym); |
| } |
| } |
| |
| /* Use a copy of the descriptor for dummy arrays. */ |
| if ((sym->attr.dimension || sym->attr.codimension) |
| && !TREE_USED (sym->backend_decl)) |
| { |
| decl = gfc_build_dummy_array_decl (sym, sym->backend_decl); |
| /* Prevent the dummy from being detected as unused if it is copied. */ |
| if (sym->backend_decl != NULL && decl != sym->backend_decl) |
| DECL_ARTIFICIAL (sym->backend_decl) = 1; |
| sym->backend_decl = decl; |
| } |
| |
| /* Returning the descriptor for dummy class arrays is hazardous, because |
| some caller is expecting an expression to apply the component refs to. |
| Therefore the descriptor is only created and stored in |
| sym->backend_decl's GFC_DECL_SAVED_DESCRIPTOR. The caller is then |
| responsible to extract it from there, when the descriptor is |
| desired. */ |
| if (IS_CLASS_ARRAY (sym) |
| && (!DECL_LANG_SPECIFIC (sym->backend_decl) |
| || !GFC_DECL_SAVED_DESCRIPTOR (sym->backend_decl))) |
| { |
| decl = gfc_build_dummy_array_decl (sym, sym->backend_decl); |
| /* Prevent the dummy from being detected as unused if it is copied. */ |
| if (sym->backend_decl != NULL && decl != sym->backend_decl) |
| DECL_ARTIFICIAL (sym->backend_decl) = 1; |
| sym->backend_decl = decl; |
| } |
| |
| TREE_USED (sym->backend_decl) = 1; |
| if (sym->attr.assign && GFC_DECL_ASSIGN (sym->backend_decl) == 0) |
| gfc_add_assign_aux_vars (sym); |
| |
| if (sym->ts.type == BT_CLASS && sym->backend_decl) |
| GFC_DECL_CLASS(sym->backend_decl) = 1; |
| |
| return sym->backend_decl; |
| } |
| |
| if (sym->result == sym && sym->attr.assign |
| && GFC_DECL_ASSIGN (sym->backend_decl) == 0) |
| gfc_add_assign_aux_vars (sym); |
| |
| if (sym->backend_decl) |
| return sym->backend_decl; |
| |
| /* Special case for array-valued named constants from intrinsic |
| procedures; those are inlined. */ |
| if (sym->attr.use_assoc && sym->attr.flavor == FL_PARAMETER |
| && (sym->from_intmod == INTMOD_ISO_FORTRAN_ENV |
| || sym->from_intmod == INTMOD_ISO_C_BINDING)) |
| intrinsic_array_parameter = true; |
| |
| /* If use associated compilation, use the module |
| declaration. */ |
| if ((sym->attr.flavor == FL_VARIABLE |
| || sym->attr.flavor == FL_PARAMETER) |
| && (sym->attr.use_assoc || sym->attr.used_in_submodule) |
| && !intrinsic_array_parameter |
| && sym->module |
| && gfc_get_module_backend_decl (sym)) |
| { |
| if (sym->ts.type == BT_CLASS && sym->backend_decl) |
| GFC_DECL_CLASS(sym->backend_decl) = 1; |
| return sym->backend_decl; |
| } |
| |
| if (sym->attr.flavor == FL_PROCEDURE) |
| { |
| /* Catch functions. Only used for actual parameters, |
| procedure pointers and procptr initialization targets. */ |
| if (sym->attr.use_assoc |
| || sym->attr.used_in_submodule |
| || sym->attr.intrinsic |
| || sym->attr.if_source != IFSRC_DECL) |
| { |
| decl = gfc_get_extern_function_decl (sym); |
| } |
| else |
| { |
| if (!sym->backend_decl) |
| build_function_decl (sym, false); |
| decl = sym->backend_decl; |
| } |
| return decl; |
| } |
| |
| if (sym->attr.intrinsic) |
| gfc_internal_error ("intrinsic variable which isn't a procedure"); |
| |
| /* Create string length decl first so that they can be used in the |
| type declaration. For associate names, the target character |
| length is used. Set 'length' to a constant so that if the |
| string length is a variable, it is not finished a second time. */ |
| if (sym->ts.type == BT_CHARACTER) |
| { |
| if (sym->attr.associate_var |
| && sym->ts.deferred |
| && sym->assoc && sym->assoc->target |
| && ((sym->assoc->target->expr_type == EXPR_VARIABLE |
| && sym->assoc->target->symtree->n.sym->ts.type != BT_CHARACTER) |
| || sym->assoc->target->expr_type != EXPR_VARIABLE)) |
| sym->ts.u.cl->backend_decl = NULL_TREE; |
| |
| if (sym->attr.associate_var |
| && sym->ts.u.cl->backend_decl |
| && (VAR_P (sym->ts.u.cl->backend_decl) |
| || TREE_CODE (sym->ts.u.cl->backend_decl) == PARM_DECL)) |
| length = gfc_index_zero_node; |
| else |
| length = gfc_create_string_length (sym); |
| } |
| |
| /* Create the decl for the variable. */ |
| decl = build_decl (gfc_get_location (&sym->declared_at), |
| VAR_DECL, gfc_sym_identifier (sym), gfc_sym_type (sym)); |
| |
| /* Add attributes to variables. Functions are handled elsewhere. */ |
| attributes = add_attributes_to_decl (sym->attr, NULL_TREE); |
| decl_attributes (&decl, attributes, 0); |
| |
| /* Symbols from modules should have their assembler names mangled. |
| This is done here rather than in gfc_finish_var_decl because it |
| is different for string length variables. */ |
| if (sym->module || sym->fn_result_spec) |
| { |
| gfc_set_decl_assembler_name (decl, gfc_sym_mangled_identifier (sym)); |
| if (sym->attr.use_assoc && !intrinsic_array_parameter) |
| DECL_IGNORED_P (decl) = 1; |
| } |
| |
| if (sym->attr.select_type_temporary) |
| { |
| DECL_ARTIFICIAL (decl) = 1; |
| DECL_IGNORED_P (decl) = 1; |
| } |
| |
| if (sym->attr.dimension || sym->attr.codimension) |
| { |
| /* Create variables to hold the non-constant bits of array info. */ |
| gfc_build_qualified_array (decl, sym); |
| |
| if (sym->attr.contiguous |
| || ((sym->attr.allocatable || !sym->attr.dummy) && !sym->attr.pointer)) |
| GFC_DECL_PACKED_ARRAY (decl) = 1; |
| } |
| |
| /* Remember this variable for allocation/cleanup. */ |
| if (sym->attr.dimension || sym->attr.allocatable || sym->attr.codimension |
| || (sym->ts.type == BT_CLASS && |
| (CLASS_DATA (sym)->attr.dimension |
| || CLASS_DATA (sym)->attr.allocatable)) |
| || (sym->ts.type == BT_DERIVED |
| && (sym->ts.u.derived->attr.alloc_comp |
| || (!sym->attr.pointer && !sym->attr.artificial && !sym->attr.save |
| && !sym->ns->proc_name->attr.is_main_program |
| && gfc_is_finalizable (sym->ts.u.derived, NULL)))) |
| /* This applies a derived type default initializer. */ |
| || (sym->ts.type == BT_DERIVED |
| && sym->attr.save == SAVE_NONE |
| && !sym->attr.data |
| && !sym->attr.allocatable |
| && (sym->value && !sym->ns->proc_name->attr.is_main_program) |
| && !(sym->attr.use_assoc && !intrinsic_array_parameter))) |
| gfc_defer_symbol_init (sym); |
| |
| if (sym->ts.type == BT_CHARACTER |
| && sym->attr.allocatable |
| && !sym->attr.dimension |
| && sym->ts.u.cl && sym->ts.u.cl->length |
| && sym->ts.u.cl->length->expr_type == EXPR_VARIABLE) |
| gfc_defer_symbol_init (sym); |
| |
| /* Associate names can use the hidden string length variable |
| of their associated target. */ |
| if (sym->ts.type == BT_CHARACTER |
| && TREE_CODE (length) != INTEGER_CST |
| && TREE_CODE (sym->ts.u.cl->backend_decl) != INDIRECT_REF) |
| { |
| length = fold_convert (gfc_charlen_type_node, length); |
| gfc_finish_var_decl (length, sym); |
| if (!sym->attr.associate_var |
| && TREE_CODE (length) == VAR_DECL |
| && sym->value && sym->value->expr_type != EXPR_NULL |
| && sym->value->ts.u.cl->length) |
| { |
| gfc_expr *len = sym->value->ts.u.cl->length; |
| DECL_INITIAL (length) = gfc_conv_initializer (len, &len->ts, |
| TREE_TYPE (length), |
| false, false, false); |
| DECL_INITIAL (length) = fold_convert (gfc_charlen_type_node, |
| DECL_INITIAL (length)); |
| } |
| else |
| gcc_assert (!sym->value || sym->value->expr_type == EXPR_NULL); |
| } |
| |
| gfc_finish_var_decl (decl, sym); |
| |
| if (sym->ts.type == BT_CHARACTER) |
| /* Character variables need special handling. */ |
| gfc_allocate_lang_decl (decl); |
| |
| if (sym->assoc && sym->attr.subref_array_pointer) |
| sym->attr.pointer = 1; |
| |
| if (sym->attr.pointer && sym->attr.dimension |
| && !sym->ts.deferred |
| && !(sym->attr.select_type_temporary |
| && !sym->attr.subref_array_pointer)) |
| GFC_DECL_PTR_ARRAY_P (decl) = 1; |
| |
| if (sym->ts.type == BT_CLASS) |
| GFC_DECL_CLASS(decl) = 1; |
| |
| sym->backend_decl = decl; |
| |
| if (sym->attr.assign) |
| gfc_add_assign_aux_vars (sym); |
| |
| if (intrinsic_array_parameter) |
| { |
| TREE_STATIC (decl) = 1; |
| DECL_EXTERNAL (decl) = 0; |
| } |
| |
| if (TREE_STATIC (decl) |
| && !(sym->attr.use_assoc && !intrinsic_array_parameter) |
| && (sym->attr.save || sym->ns->proc_name->attr.is_main_program |
| || !gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl)) |
| || sym->attr.data || sym->ns->proc_name->attr.flavor == FL_MODULE) |
| && (flag_coarray != GFC_FCOARRAY_LIB |
| || !sym->attr.codimension || sym->attr.allocatable) |
| && !(sym->ts.type == BT_DERIVED && sym->ts.u.derived->attr.pdt_type) |
| && !(sym->ts.type == BT_CLASS |
| && CLASS_DATA (sym)->ts.u.derived->attr.pdt_type)) |
| { |
| /* Add static initializer. For procedures, it is only needed if |
| SAVE is specified otherwise they need to be reinitialized |
| every time the procedure is entered. The TREE_STATIC is |
| in this case due to -fmax-stack-var-size=. */ |
| |
| DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts, |
| TREE_TYPE (decl), sym->attr.dimension |
| || (sym->attr.codimension |
| && sym->attr.allocatable), |
| sym->attr.pointer || sym->attr.allocatable |
| || sym->ts.type == BT_CLASS, |
| sym->attr.proc_pointer); |
| } |
| |
| if (!TREE_STATIC (decl) |
| && POINTER_TYPE_P (TREE_TYPE (decl)) |
| && !sym->attr.pointer |
| && !sym->attr.allocatable |
| && !sym->attr.proc_pointer |
| && !sym->attr.select_type_temporary) |
| DECL_BY_REFERENCE (decl) = 1; |
| |
| if (sym->attr.associate_var) |
| GFC_DECL_ASSOCIATE_VAR_P (decl) = 1; |
| |
| /* We only longer mark __def_init as read-only if it actually has an |
| initializer, it does not needlessly take up space in the |
| read-only section and can go into the BSS instead, see PR 84487. |
| Marking this as artificial means that OpenMP will treat this as |
| predetermined shared. */ |
| |
| bool def_init = startswith (sym->name, "__def_init"); |
| |
| if (sym->attr.vtab || def_init) |
| { |
| DECL_ARTIFICIAL (decl) = 1; |
| if (def_init && sym->value) |
| TREE_READONLY (decl) = 1; |
| } |
| |
| return decl; |
| } |
| |
| |
| /* Substitute a temporary variable in place of the real one. */ |
| |
| void |
| gfc_shadow_sym (gfc_symbol * sym, tree decl, gfc_saved_var * save) |
| { |
| save->attr = sym->attr; |
| save->decl = sym->backend_decl; |
| |
| gfc_clear_attr (&sym->attr); |
| sym->attr.referenced = 1; |
| sym->attr.flavor = FL_VARIABLE; |
| |
| sym->backend_decl = decl; |
| } |
| |
| |
| /* Restore the original variable. */ |
| |
| void |
| gfc_restore_sym (gfc_symbol * sym, gfc_saved_var * save) |
| { |
| sym->attr = save->attr; |
| sym->backend_decl = save->decl; |
| } |
| |
| |
| /* Declare a procedure pointer. */ |
| |
| static tree |
| get_proc_pointer_decl (gfc_symbol *sym) |
| { |
| tree decl; |
| tree attributes; |
| |
| if (sym->module || sym->fn_result_spec) |
| { |
| const char *name; |
| gfc_gsymbol *gsym; |
| |
| name = mangled_identifier (sym); |
| gsym = gfc_find_gsymbol (gfc_gsym_root, name); |
| if (gsym != NULL) |
| { |
| gfc_symbol *s; |
| gfc_find_symbol (sym->name, gsym->ns, 0, &s); |
| if (s && s->backend_decl) |
| return s->backend_decl; |
| } |
| } |
| |
| decl = sym->backend_decl; |
| if (decl) |
| return decl; |
| |
| decl = build_decl (input_location, |
| VAR_DECL, get_identifier (sym->name), |
| build_pointer_type (gfc_get_function_type (sym))); |
| |
| if (sym->module) |
| { |
| /* Apply name mangling. */ |
| gfc_set_decl_assembler_name (decl, gfc_sym_mangled_identifier (sym)); |
| if (sym->attr.use_assoc) |
| DECL_IGNORED_P (decl) = 1; |
| } |
| |
| if ((sym->ns->proc_name |
| && sym->ns->proc_name->backend_decl == current_function_decl) |
| || sym->attr.contained) |
| gfc_add_decl_to_function (decl); |
| else if (sym->ns->proc_name->attr.flavor != FL_MODULE) |
| gfc_add_decl_to_parent_function (decl); |
| |
| sym->backend_decl = decl; |
| |
| /* If a variable is USE associated, it's always external. */ |
| if (sym->attr.use_assoc) |
| { |
| DECL_EXTERNAL (decl) = 1; |
| TREE_PUBLIC (decl) = 1; |
| } |
| else if (sym->module && sym->ns->proc_name->attr.flavor == FL_MODULE) |
| { |
| /* This is the declaration of a module variable. */ |
| TREE_PUBLIC (decl) = 1; |
| if (sym->attr.access == ACCESS_PRIVATE && !sym->attr.public_used) |
| { |
| DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN; |
| DECL_VISIBILITY_SPECIFIED (decl) = true; |
| } |
| TREE_STATIC (decl) = 1; |
| } |
| |
| if (!sym->attr.use_assoc |
| && (sym->attr.save != SAVE_NONE || sym->attr.data |
| || (sym->value && sym->ns->proc_name->attr.is_main_program))) |
| TREE_STATIC (decl) = 1; |
| |
| if (TREE_STATIC (decl) && sym->value) |
| { |
| /* Add static initializer. */ |
| DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts, |
| TREE_TYPE (decl), |
| sym->attr.dimension, |
| false, true); |
| } |
| |
| /* Handle threadprivate procedure pointers. */ |
| if (sym->attr.threadprivate |
| && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) |
| set_decl_tls_model (decl, decl_default_tls_model (decl)); |
| |
| attributes = add_attributes_to_decl (sym->attr, NULL_TREE); |
| decl_attributes (&decl, attributes, 0); |
| |
| return decl; |
| } |
| |
| |
| /* Get a basic decl for an external function. */ |
| |
| tree |
| gfc_get_extern_function_decl (gfc_symbol * sym, gfc_actual_arglist *actual_args, |
| const char *fnspec) |
| { |
| tree type; |
| tree fndecl; |
| tree attributes; |
| gfc_expr e; |
| gfc_intrinsic_sym *isym; |
| gfc_expr argexpr; |
| char s[GFC_MAX_SYMBOL_LEN + 23]; /* "_gfortran_f2c_specific" and '\0'. */ |
| tree name; |
| tree mangled_name; |
| gfc_gsymbol *gsym; |
| |
| if (sym->backend_decl) |
| return sym->backend_decl; |
| |
| /* We should never be creating external decls for alternate entry points. |
| The procedure may be an alternate entry point, but we don't want/need |
| to know that. */ |
| gcc_assert (!(sym->attr.entry || sym->attr.entry_master)); |
| |
| if (sym->attr.proc_pointer) |
| return get_proc_pointer_decl (sym); |
| |
| /* See if this is an external procedure from the same file. If so, |
| return the backend_decl. If we are looking at a BIND(C) |
| procedure and the symbol is not BIND(C), or vice versa, we |
| haven't found the right procedure. */ |
| |
| if (sym->binding_label) |
| { |
| gsym = gfc_find_gsymbol (gfc_gsym_root, sym->binding_label); |
| if (gsym && !gsym->bind_c) |
| gsym = NULL; |
| } |
| else if (sym->module == NULL) |
| { |
| gsym = gfc_find_gsymbol (gfc_gsym_root, sym->name); |
| if (gsym && gsym->bind_c) |
| gsym = NULL; |
| } |
| else |
| { |
| /* Procedure from a different module. */ |
| gsym = NULL; |
| } |
| |
| if (gsym && !gsym->defined) |
| gsym = NULL; |
| |
| /* This can happen because of C binding. */ |
| if (gsym && gsym->ns && gsym->ns->proc_name |
| && gsym->ns->proc_name->attr.flavor == FL_MODULE) |
| goto module_sym; |
| |
| if ((!sym->attr.use_assoc || sym->attr.if_source != IFSRC_DECL) |
| && !sym->backend_decl |
| && gsym && gsym->ns |
| && ((gsym->type == GSYM_SUBROUTINE) || (gsym->type == GSYM_FUNCTION)) |
| && (gsym->ns->proc_name->backend_decl || !sym->attr.intrinsic)) |
| { |
| if (!gsym->ns->proc_name->backend_decl) |
| { |
| /* By construction, the external function cannot be |
| a contained procedure. */ |
| locus old_loc; |
| |
| gfc_save_backend_locus (&old_loc); |
| push_cfun (NULL); |
| |
| gfc_create_function_decl (gsym->ns, true); |
| |
| pop_cfun (); |
| gfc_restore_backend_locus (&old_loc); |
| } |
| |
| /* If the namespace has entries, the proc_name is the |
| entry master. Find the entry and use its backend_decl. |
| otherwise, use the proc_name backend_decl. */ |
| if (gsym->ns->entries) |
| { |
| gfc_entry_list *entry = gsym->ns->entries; |
| |
| for (; entry; entry = entry->next) |
| { |
| if (strcmp (gsym->name, entry->sym->name) == 0) |
| { |
| sym->backend_decl = entry->sym->backend_decl; |
| break; |
| } |
| } |
| } |
| else |
| sym->backend_decl = gsym->ns->proc_name->backend_decl; |
| |
| if (sym->backend_decl) |
| { |
| /* Avoid problems of double deallocation of the backend declaration |
| later in gfc_trans_use_stmts; cf. PR 45087. */ |
| if (sym->attr.if_source != IFSRC_DECL && sym->attr.use_assoc) |
| sym->attr.use_assoc = 0; |
| |
| return sym->backend_decl; |
| } |
| } |
| |
| /* See if this is a module procedure from the same file. If so, |
| return the backend_decl. */ |
| if (sym->module) |
| gsym = gfc_find_gsymbol (gfc_gsym_root, sym->module); |
| |
| module_sym: |
| if (gsym && gsym->ns |
| && (gsym->type == GSYM_MODULE |
| || (gsym->ns->proc_name && gsym->ns->proc_name->attr.flavor == FL_MODULE))) |
| { |
| gfc_symbol *s; |
| |
| s = NULL; |
| if (gsym->type == GSYM_MODULE) |
| gfc_find_symbol (sym->name, gsym->ns, 0, &s); |
| else |
| gfc_find_symbol (gsym->sym_name, gsym->ns, 0, &s); |
| |
| if (s && s->backend_decl) |
| { |
| if (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS) |
| gfc_copy_dt_decls_ifequal (s->ts.u.derived, sym->ts.u.derived, |
| true); |
| else if (sym->ts.type == BT_CHARACTER) |
| sym->ts.u.cl->backend_decl = s->ts.u.cl->backend_decl; |
| sym->backend_decl = s->backend_decl; |
| return sym->backend_decl; |
| } |
| } |
| |
| if (sym->attr.intrinsic) |
| { |
| /* Call the resolution function to get the actual name. This is |
| a nasty hack which relies on the resolution functions only looking |
| at the first argument. We pass NULL for the second argument |
| otherwise things like AINT get confused. */ |
| isym = gfc_find_function (sym->name); |
| gcc_assert (isym->resolve.f0 != NULL); |
| |
| memset (&e, 0, sizeof (e)); |
| e.expr_type = EXPR_FUNCTION; |
| |
| memset (&argexpr, 0, sizeof (argexpr)); |
| gcc_assert (isym->formal); |
| argexpr.ts = isym->formal->ts; |
| |
| if (isym->formal->next == NULL) |
| isym->resolve.f1 (&e, &argexpr); |
| else |
| { |
| if (isym->formal->next->next == NULL) |
| isym->resolve.f2 (&e, &argexpr, NULL); |
| else |
| { |
| if (isym->formal->next->next->next == NULL) |
| isym->resolve.f3 (&e, &argexpr, NULL, NULL); |
| else |
| { |
| /* All specific intrinsics take less than 5 arguments. */ |
| gcc_assert (isym->formal->next->next->next->next == NULL); |
| isym->resolve.f4 (&e, &argexpr, NULL, NULL, NULL); |
| } |
| } |
| } |
| |
| if (flag_f2c |
| && ((e.ts.type == BT_REAL && e.ts.kind == gfc_default_real_kind) |
| || e.ts.type == BT_COMPLEX)) |
| { |
| /* Specific which needs a different implementation if f2c |
| calling conventions are used. */ |
| sprintf (s, "_gfortran_f2c_specific%s", e.value.function.name); |
| } |
| else |
| sprintf (s, "_gfortran_specific%s", e.value.function.name); |
| |
| name = get_identifier (s); |
| mangled_name = name; |
| } |
| else |
| { |
| name = gfc_sym_identifier (sym); |
| mangled_name = gfc_sym_mangled_function_id (sym); |
| } |
| |
| type = gfc_get_function_type (sym, actual_args, fnspec); |
| |
| fndecl = build_decl (input_location, |
| FUNCTION_DECL, name, type); |
| |
| /* Initialize DECL_EXTERNAL and TREE_PUBLIC before calling decl_attributes; |
| TREE_PUBLIC specifies whether a function is globally addressable (i.e. |
| the opposite of declaring a function as static in C). */ |
| DECL_EXTERNAL (fndecl) = 1; |
| TREE_PUBLIC (fndecl) = 1; |
| |
| attributes = add_attributes_to_decl (sym->attr, NULL_TREE); |
| decl_attributes (&fndecl, attributes, 0); |
| |
| gfc_set_decl_assembler_name (fndecl, mangled_name); |
| |
| /* Set the context of this decl. */ |
| if (0 && sym->ns && sym->ns->proc_name) |
| { |
| /* TODO: Add external decls to the appropriate scope. */ |
| DECL_CONTEXT (fndecl) = sym->ns->proc_name->backend_decl; |
| } |
| else |
| { |
| /* Global declaration, e.g. intrinsic subroutine. */ |
| DECL_CONTEXT (fndecl) = NULL_TREE; |
| } |
| |
| /* Set attributes for PURE functions. A call to PURE function in the |
| Fortran 95 sense is both pure and without side effects in the C |
| sense. */ |
| if (sym->attr.pure || sym->attr.implicit_pure) |
| { |
| if (sym->attr.function && !gfc_return_by_reference (sym)) |
| DECL_PURE_P (fndecl) = 1; |
| /* TODO: check if pure SUBROUTINEs don't have INTENT(OUT) |
| parameters and don't use alternate returns (is this |
| allowed?). In that case, calls to them are meaningless, and |
| can be optimized away. See also in build_function_decl(). */ |
| TREE_SIDE_EFFECTS (fndecl) = 0; |
| } |
| |
| /* Mark non-returning functions. */ |
| if (sym->attr.noreturn) |
| TREE_THIS_VOLATILE(fndecl) = 1; |
| |
| sym->backend_decl = fndecl; |
| |
| if (DECL_CONTEXT (fndecl) == NULL_TREE) |
| pushdecl_top_level (fndecl); |
| |
| if (sym->formal_ns |
| && sym->formal_ns->proc_name == sym) |
| { |
| if (sym->formal_ns->omp_declare_simd) |
| gfc_trans_omp_declare_simd (sym->formal_ns); |
| if (flag_openmp) |
| gfc_trans_omp_declare_variant (sym->formal_ns); |
| } |
| |
| return fndecl; |
| } |
| |
| |
| /* Create a declaration for a procedure. For external functions (in the C |
| sense) use gfc_get_extern_function_decl. HAS_ENTRIES is true if this is |
| a master function with alternate entry points. */ |
| |
| static void |
| build_function_decl (gfc_symbol * sym, bool global) |
| { |
| tree fndecl, type, attributes; |
| symbol_attribute attr; |
| tree result_decl; |
| gfc_formal_arglist *f; |
| |
| bool module_procedure = sym->attr.module_procedure |
| && sym->ns |
| && sym->ns->proc_name |
| && sym->ns->proc_name->attr.flavor == FL_MODULE; |
| |
| gcc_assert (!sym->attr.external || module_procedure); |
| |
| if (sym->backend_decl) |
| return; |
| |
| /* Set the line and filename. sym->declared_at seems to point to the |
| last statement for subroutines, but it'll do for now. */ |
| gfc_set_backend_locus (&sym->declared_at); |
| |
| /* Allow only one nesting level. Allow public declarations. */ |
| gcc_assert (current_function_decl == NULL_TREE |
| || DECL_FILE_SCOPE_P (current_function_decl) |
| || (TREE_CODE (DECL_CONTEXT (current_function_decl)) |
| == NAMESPACE_DECL)); |
| |
| type = gfc_get_function_type (sym); |
| fndecl = build_decl (input_location, |
| FUNCTION_DECL, gfc_sym_identifier (sym), type); |
| |
| attr = sym->attr; |
| |
| /* Initialize DECL_EXTERNAL and TREE_PUBLIC before calling decl_attributes; |
| TREE_PUBLIC specifies whether a function is globally addressable (i.e. |
| the opposite of declaring a function as static in C). */ |
| DECL_EXTERNAL (fndecl) = 0; |
| |
| if (sym->attr.access == ACCESS_UNKNOWN && sym->module |
| && (sym->ns->default_access == ACCESS_PRIVATE |
| || (sym->ns->default_access == ACCESS_UNKNOWN |
| && flag_module_private))) |
| sym->attr.access = ACCESS_PRIVATE; |
| |
| if (!current_function_decl |
| && !sym->attr.entry_master && !sym->attr.is_main_program |
| && (sym->attr.access != ACCESS_PRIVATE || sym->binding_label |
| || sym->attr.public_used)) |
| TREE_PUBLIC (fndecl) = 1; |
| |
| if (sym->attr.referenced || sym->attr.entry_master) |
| TREE_USED (fndecl) = 1; |
| |
| attributes = add_attributes_to_decl (attr, NULL_TREE); |
| decl_attributes (&fndecl, attributes, 0); |
| |
| /* Figure out the return type of the declared function, and build a |
| RESULT_DECL for it. If this is a subroutine with alternate |
| returns, build a RESULT_DECL for it. */ |
| result_decl = NULL_TREE; |
| /* TODO: Shouldn't this just be TREE_TYPE (TREE_TYPE (fndecl)). */ |
| if (attr.function) |
| { |
| if (gfc_return_by_reference (sym)) |
| type = void_type_node; |
| else |
| { |
| if (sym->result != sym) |
| result_decl = gfc_sym_identifier (sym->result); |
| |
| type = TREE_TYPE (TREE_TYPE (fndecl)); |
| } |
| } |
| else |
| { |
| /* Look for alternate return placeholders. */ |
| int has_alternate_returns = 0; |
| for (f = gfc_sym_get_dummy_args (sym); f; f = f->next) |
| { |
| if (f->sym == NULL) |
| { |
| has_alternate_returns = 1; |
| break; |
| } |
| } |
| |
| if (has_alternate_returns) |
| type = integer_type_node; |
| else |
| type = void_type_node; |
| } |
| |
| result_decl = build_decl (input_location, |
| RESULT_DECL, result_decl, type); |
| DECL_ARTIFICIAL (result_decl) = 1; |
| DECL_IGNORED_P (result_decl) = 1; |
| DECL_CONTEXT (result_decl) = fndecl; |
| DECL_RESULT (fndecl) = result_decl; |
| |
| /* Don't call layout_decl for a RESULT_DECL. |
| layout_decl (result_decl, 0); */ |
| |
| /* TREE_STATIC means the function body is defined here. */ |
| TREE_STATIC (fndecl) = 1; |
| |
| /* Set attributes for PURE functions. A call to a PURE function in the |
| Fortran 95 sense is both pure and without side effects in the C |
| sense. */ |
| if (attr.pure || attr.implicit_pure) |
| { |
| /* TODO: check if a pure SUBROUTINE has no INTENT(OUT) arguments |
| including an alternate return. In that case it can also be |
| marked as PURE. See also in gfc_get_extern_function_decl(). */ |
| if (attr.function && !gfc_return_by_reference (sym)) |
| DECL_PURE_P (fndecl) = 1; |
| TREE_SIDE_EFFECTS (fndecl) = 0; |
| } |
| |
| |
| /* Layout the function declaration and put it in the binding level |
| of the current function. */ |
| |
| if (global) |
| pushdecl_top_level (fndecl); |
| else |
| pushdecl (fndecl); |
| |
| /* Perform name mangling if this is a top level or module procedure. */ |
| if (current_function_decl == NULL_TREE) |
| gfc_set_decl_assembler_name (fndecl, gfc_sym_mangled_function_id (sym)); |
| |
| sym->backend_decl = fndecl; |
| } |
| |
| |
| /* Create the DECL_ARGUMENTS for a procedure. |
| NOTE: The arguments added here must match the argument type created by |
| gfc_get_function_type (). */ |
| |
| static void |
| create_function_arglist (gfc_symbol * sym) |
| { |
| tree fndecl; |
| gfc_formal_arglist *f; |
| tree typelist, hidden_typelist; |
| tree arglist, hidden_arglist; |
| tree type; |
| tree parm; |
| |
| fndecl = sym->backend_decl; |
| |
| /* Build formal argument list. Make sure that their TREE_CONTEXT is |
| the new FUNCTION_DECL node. */ |
| arglist = NULL_TREE; |
| hidden_arglist = NULL_TREE; |
| typelist = TYPE_ARG_TYPES (TREE_TYPE (fndecl)); |
| |
| if (sym->attr.entry_master) |
| { |
| type = TREE_VALUE (typelist); |
| parm = build_decl (input_location, |
| PARM_DECL, get_identifier ("__entry"), type); |
| |
| DECL_CONTEXT (parm) = fndecl; |
| DECL_ARG_TYPE (parm) = type; |
| TREE_READONLY (parm) = 1; |
| gfc_finish_decl (parm); |
| DECL_ARTIFICIAL (parm) = 1; |
| |
| arglist = chainon (arglist, parm); |
| typelist = TREE_CHAIN (typelist); |
| } |
| |
| if (gfc_return_by_reference (sym)) |
| { |
| tree type = TREE_VALUE (typelist), length = NULL; |
| |
| if (sym->ts.type == BT_CHARACTER) |
| { |
| /* Length of character result. */ |
| tree len_type = TREE_VALUE (TREE_CHAIN (typelist)); |
| |
| length = build_decl (input_location, |
| PARM_DECL, |
| get_identifier (".__result"), |
| len_type); |
| if (POINTER_TYPE_P (len_type)) |
| { |
| sym->ts.u.cl->passed_length = length; |
| TREE_USED (length) = 1; |
| } |
| else if (!sym->ts.u.cl->length) |
| { |
| sym->ts.u.cl->backend_decl = length; |
| TREE_USED (length) = 1; |
| } |
| gcc_assert (TREE_CODE (length) == PARM_DECL); |
| DECL_CONTEXT (length) = fndecl; |
| DECL_ARG_TYPE (length) = len_type; |
| TREE_READONLY (length) = 1; |
| DECL_ARTIFICIAL (length) = 1; |
| gfc_finish_decl (length); |
| if (sym->ts.u.cl->backend_decl == NULL |
| || sym->ts.u.cl->backend_decl == length) |
| { |
| gfc_symbol *arg; |
| tree backend_decl; |
| |
| if (sym->ts.u.cl->backend_decl == NULL) |
| { |
| tree len = build_decl (input_location, |
| VAR_DECL, |
| get_identifier ("..__result"), |
| gfc_charlen_type_node); |
| DECL_ARTIFICIAL (len) = 1; |
| TREE_USED (len) = 1; |
| sym->ts.u.cl->backend_decl = len; |
| } |
| |
| /* Make sure PARM_DECL type doesn't point to incomplete type. */ |
| arg = sym->result ? sym->result : sym; |
| backend_decl = arg->backend_decl; |
| /* Temporary clear it, so that gfc_sym_type creates complete |
| type. */ |
| arg->backend_decl = NULL; |
| type = gfc_sym_type (arg); |
| arg->backend_decl = backend_decl; |
| type = build_reference_type (type); |
| } |
| } |
| |
| parm = build_decl (input_location, |
| PARM_DECL, get_identifier ("__result"), type); |
| |
| DECL_CONTEXT (parm) = fndecl; |
| DECL_ARG_TYPE (parm) = TREE_VALUE (typelist); |
| TREE_READONLY (parm) = 1; |
| DECL_ARTIFICIAL (parm) = 1; |
| gfc_finish_decl (parm); |
| |
| arglist = chainon (arglist, parm); |
| typelist = TREE_CHAIN (typelist); |
| |
| if (sym->ts.type == BT_CHARACTER) |
| { |
| gfc_allocate_lang_decl (parm); |
| arglist = chainon (arglist, length); |
| typelist = TREE_CHAIN (typelist); |
| } |
| } |
| |
| hidden_typelist = typelist; |
| for (f = gfc_sym_get_dummy_args (sym); f; f = f->next) |
| if (f->sym != NULL) /* Ignore alternate returns. */ |
| hidden_typelist = TREE_CHAIN (hidden_typelist); |
| |
| for (f = gfc_sym_get_dummy_args (sym); f; f = f->next) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 2]; |
| |
| /* Ignore alternate returns. */ |
| if (f->sym == NULL) |
| continue; |
| |
| type = TREE_VALUE (typelist); |
| |
| if (f->sym->ts.type == BT_CHARACTER |
| && (!sym->attr.is_bind_c || sym->attr.entry_master)) |
| { |
| tree len_type = TREE_VALUE (hidden_typelist); |
| tree length = NULL_TREE; |
| if (!f->sym->ts.deferred) |
| gcc_assert (len_type == gfc_charlen_type_node); |
| else |
| gcc_assert (POINTER_TYPE_P (len_type)); |
| |
| strcpy (&name[1], f->sym->name); |
| name[0] = '_'; |
| length = build_decl (input_location, |
| PARM_DECL, get_identifier (name), len_type); |
| |
| hidden_arglist = chainon (hidden_arglist, length); |
| DECL_CONTEXT (length) = fndecl; |
| DECL_ARTIFICIAL (length) = 1; |
| DECL_ARG_TYPE (length) = len_type; |
| TREE_READONLY (length) = 1; |
| gfc_finish_decl (length); |
| |
| /* Marking the length DECL_HIDDEN_STRING_LENGTH will lead |
| to tail calls being disabled. Only do that if we |
| potentially have broken callers. */ |
| if (flag_tail_call_workaround |
| && f->sym->ts.u.cl |
| && f->sym->ts.u.cl->length |
| && f->sym->ts.u.cl->length->expr_type == EXPR_CONSTANT |
| && (flag_tail_call_workaround == 2 |
| || f->sym->ns->implicit_interface_calls)) |
| DECL_HIDDEN_STRING_LENGTH (length) = 1; |
| |
| /* Remember the passed value. */ |
| if (!f->sym->ts.u.cl || f->sym->ts.u.cl->passed_length) |
| { |
| /* This can happen if the same type is used for multiple |
| arguments. We need to copy cl as otherwise |
| cl->passed_length gets overwritten. */ |
| f->sym->ts.u.cl = gfc_new_charlen (f->sym->ns, f->sym->ts.u.cl); |
| } |
| f->sym->ts.u.cl->passed_length = length; |
| |
| /* Use the passed value for assumed length variables. */ |
| if (!f->sym->ts.u.cl->length) |
| { |
| TREE_USED (length) = 1; |
| gcc_assert (!f->sym->ts.u.cl->backend_decl); |
| f->sym->ts.u.cl->backend_decl = length; |
| } |
| |
| hidden_typelist = TREE_CHAIN (hidden_typelist); |
| |
| if (f->sym->ts.u.cl->backend_decl == NULL |
| || f->sym->ts.u.cl->backend_decl == length) |
| { |
| if (POINTER_TYPE_P (len_type)) |
| f->sym->ts.u.cl->backend_decl |
| = build_fold_indirect_ref_loc (input_location, length); |
| else if (f->sym->ts.u.cl->backend_decl == NULL) |
| gfc_create_string_length (f->sym); |
| |
| /* Make sure PARM_DECL type doesn't point to incomplete type. */ |
| if (f->sym->attr.flavor == FL_PROCEDURE) |
| type = build_pointer_type (gfc_get_function_type (f->sym)); |
| else |
| type = gfc_sym_type (f->sym); |
| } |
| } |
| /* For noncharacter scalar intrinsic types, VALUE passes the value, |
| hence, the optional status cannot be transferred via a NULL pointer. |
| Thus, we will use a hidden argument in that case. */ |
| else if (f->sym->attr.optional && f->sym->attr.value |
| && !f->sym->attr.dimension && f->sym->ts.type != BT_CLASS |
| && !gfc_bt_struct (f->sym->ts.type)) |
| { |
| tree tmp; |
| strcpy (&name[1], f->sym->name); |
| name[0] = '_'; |
| tmp = build_decl (input_location, |
| PARM_DECL, get_identifier (name), |
| boolean_type_node); |
| |
| hidden_arglist = chainon (hidden_arglist, tmp); |
| DECL_CONTEXT (tmp) = fndecl; |
| DECL_ARTIFICIAL (tmp) = 1; |
| DECL_ARG_TYPE (tmp) = boolean_type_node; |
| TREE_READONLY (tmp) = 1; |
| gfc_finish_decl (tmp); |
| |
| hidden_typelist = TREE_CHAIN (hidden_typelist); |
| } |
| |
| /* For non-constant length array arguments, make sure they use |
| a different type node from TYPE_ARG_TYPES type. */ |
| if (f->sym->attr.dimension |
| && type == TREE_VALUE (typelist) |
| && TREE_CODE (type) == POINTER_TYPE |
| && GFC_ARRAY_TYPE_P (type) |
| && f->sym->as->type != AS_ASSUMED_SIZE |
| && ! COMPLETE_TYPE_P (TREE_TYPE (type))) |
| { |
| if (f->sym->attr.flavor == FL_PROCEDURE) |
| type = build_pointer_type (gfc_get_function_type (f->sym)); |
| else |
| type = gfc_sym_type (f->sym); |
| } |
| |
| if (f->sym->attr.proc_pointer) |
| type = build_pointer_type (type); |
| |
| if (f->sym->attr.volatile_) |
| type = build_qualified_type (type, TYPE_QUAL_VOLATILE); |
| |
| /* Build the argument declaration. For C descriptors, we use a |
| '_'-prefixed name for the parm_decl and inside the proc the |
| sym->name. */ |
| tree parm_name; |
| if (sym->attr.is_bind_c && is_CFI_desc (f->sym, NULL)) |
| { |
| strcpy (&name[1], f->sym->name); |
| name[0] = '_'; |
| parm_name = get_identifier (name); |
| } |
| else |
| parm_name = gfc_sym_identifier (f->sym); |
| parm = build_decl (input_location, PARM_DECL, parm_name, type); |
| |
| if (f->sym->attr.volatile_) |
| { |
| TREE_THIS_VOLATILE (parm) = 1; |
| TREE_SIDE_EFFECTS (parm) = 1; |
| } |
| |
| /* Fill in arg stuff. */ |
| DECL_CONTEXT (parm) = fndecl; |
| DECL_ARG_TYPE (parm) = TREE_VALUE (typelist); |
| /* All implementation args except for VALUE are read-only. */ |
| if (!f->sym->attr.value) |
| TREE_READONLY (parm) = 1; |
| if (POINTER_TYPE_P (type) |
| && (!f->sym->attr.proc_pointer |
| && f->sym->attr.flavor != FL_PROCEDURE)) |
| DECL_BY_REFERENCE (parm) = 1; |
| if (f->sym->attr.optional) |
| { |
| gfc_allocate_lang_decl (parm); |
| GFC_DECL_OPTIONAL_ARGUMENT (parm) = 1; |
| } |
| |
| gfc_finish_decl (parm); |
| gfc_finish_decl_attrs (parm, &f->sym->attr); |
| |
| f->sym->backend_decl = parm; |
| |
| /* Coarrays which are descriptorless or assumed-shape pass with |
| -fcoarray=lib the token and the offset as hidden arguments. */ |
| if (flag_coarray == GFC_FCOARRAY_LIB |
| && ((f->sym->ts.type != BT_CLASS && f->sym->attr.codimension |
| && !f->sym->attr.allocatable) |
| || (f->sym->ts.type == BT_CLASS |
| && CLASS_DATA (f->sym)->attr.codimension |
| && !CLASS_DATA (f->sym)->attr.allocatable))) |
| { |
| tree caf_type; |
| tree token; |
| tree offset; |
| |
| gcc_assert (f->sym->backend_decl != NULL_TREE |
| && !sym->attr.is_bind_c); |
| caf_type = f->sym->ts.type == BT_CLASS |
| ? TREE_TYPE (CLASS_DATA (f->sym)->backend_decl) |
| : TREE_TYPE (f->sym->backend_decl); |
| |
| token = build_decl (input_location, PARM_DECL, |
| create_tmp_var_name ("caf_token"), |
| build_qualified_type (pvoid_type_node, |
| TYPE_QUAL_RESTRICT)); |
| if ((f->sym->ts.type != BT_CLASS |
| && f->sym->as->type != AS_DEFERRED) |
| || (f->sym->ts.type == BT_CLASS |
| && CLASS_DATA (f->sym)->as->type != AS_DEFERRED)) |
| { |
| gcc_assert (DECL_LANG_SPECIFIC (f->sym->backend_decl) == NULL |
| || GFC_DECL_TOKEN (f->sym->backend_decl) == NULL_TREE); |
| if (DECL_LANG_SPECIFIC (f->sym->backend_decl) == NULL) |
| gfc_allocate_lang_decl (f->sym->backend_decl); |
| GFC_DECL_TOKEN (f->sym->backend_decl) = token; |
| } |
| else |
| { |
| gcc_assert (GFC_TYPE_ARRAY_CAF_TOKEN (caf_type) == NULL_TREE); |
| GFC_TYPE_ARRAY_CAF_TOKEN (caf_type) = token; |
| } |
| |
| DECL_CONTEXT (token) = fndecl; |
| DECL_ARTIFICIAL (token) = 1; |
| DECL_ARG_TYPE (token) = TREE_VALUE (typelist); |
| TREE_READONLY (token) = 1; |
| hidden_arglist = chainon (hidden_arglist, token); |
| hidden_typelist = TREE_CHAIN (hidden_typelist); |
| gfc_finish_decl (token); |
| |
| offset = build_decl (input_location, PARM_DECL, |
| create_tmp_var_name ("caf_offset"), |
| gfc_array_index_type); |
| |
| if ((f->sym->ts.type != BT_CLASS |
| && f->sym->as->type != AS_DEFERRED) |
| || (f->sym->ts.type == BT_CLASS |
| && CLASS_DATA (f->sym)->as->type != AS_DEFERRED)) |
| { |
| gcc_assert (GFC_DECL_CAF_OFFSET (f->sym->backend_decl) |
| == NULL_TREE); |
| GFC_DECL_CAF_OFFSET (f->sym->backend_decl) = offset; |
| } |
| else |
| { |
| gcc_assert (GFC_TYPE_ARRAY_CAF_OFFSET (caf_type) == NULL_TREE); |
| GFC_TYPE_ARRAY_CAF_OFFSET (caf_type) = offset; |
| } |
| DECL_CONTEXT (offset) = fndecl; |
| DECL_ARTIFICIAL (offset) = 1; |
| DECL_ARG_TYPE (offset) = TREE_VALUE (typelist); |
| TREE_READONLY (offset) = 1; |
| hidden_arglist = chainon (hidden_arglist, offset); |
| hidden_typelist = TREE_CHAIN (hidden_typelist); |
| gfc_finish_decl (offset); |
| } |
| |
| arglist = chainon (arglist, parm); |
| typelist = TREE_CHAIN (typelist); |
| } |
| |
| /* Add the hidden string length parameters, unless the procedure |
| is bind(C). */ |
| if (!sym->attr.is_bind_c) |
| arglist = chainon (arglist, hidden_arglist); |
| |
| gcc_assert (hidden_typelist == NULL_TREE |
| || TREE_VALUE (hidden_typelist) == void_type_node); |
| DECL_ARGUMENTS (fndecl) = arglist; |
| } |
| |
| /* Do the setup necessary before generating the body of a function. */ |
| |
| static void |
| trans_function_start (gfc_symbol * sym) |
| { |
| tree fndecl; |
| |
| fndecl = sym->backend_decl; |
| |
| /* Let GCC know the current scope is this function. */ |
| current_function_decl = fndecl; |
| |
| /* Let the world know what we're about to do. */ |
| announce_function (fndecl); |
| |
| if (DECL_FILE_SCOPE_P (fndecl)) |
| { |
| /* Create RTL for function declaration. */ |
| rest_of_decl_compilation (fndecl, 1, 0); |
| } |
| |
| /* Create RTL for function definition. */ |
| make_decl_rtl (fndecl); |
| |
| allocate_struct_function (fndecl, false); |
| |
| /* function.cc requires a push at the start of the function. */ |
| pushlevel (); |
| } |
| |
| /* Create thunks for alternate entry points. */ |
| |
| static void |
| build_entry_thunks (gfc_namespace * ns, bool global) |
| { |
| gfc_formal_arglist *formal; |
| gfc_formal_arglist *thunk_formal; |
| gfc_entry_list *el; |
| gfc_symbol *thunk_sym; |
| stmtblock_t body; |
| tree thunk_fndecl; |
| tree tmp; |
| locus old_loc; |
| |
| /* This should always be a toplevel function. */ |
| gcc_assert (current_function_decl == NULL_TREE); |
| |
| gfc_save_backend_locus (&old_loc); |
| for (el = ns->entries; el; el = el->next) |
| { |
| vec<tree, va_gc> *args = NULL; |
| vec<tree, va_gc> *string_args = NULL; |
| |
| thunk_sym = el->sym; |
| |
| build_function_decl (thunk_sym, global); |
| create_function_arglist (thunk_sym); |
| |
| trans_function_start (thunk_sym); |
| |
| thunk_fndecl = thunk_sym->backend_decl; |
| |
| gfc_init_block (&body); |
| |
| /* Pass extra parameter identifying this entry point. */ |
| tmp = build_int_cst (gfc_array_index_type, el->id); |
| vec_safe_push (args, tmp); |
| |
| if (thunk_sym->attr.function) |
| { |
| if (gfc_return_by_reference (ns->proc_name)) |
| { |
| tree ref = DECL_ARGUMENTS (current_function_decl); |
| vec_safe_push (args, ref); |
| if (ns->proc_name->ts.type == BT_CHARACTER) |
| vec_safe_push (args, DECL_CHAIN (ref)); |
| } |
| } |
| |
| for (formal = gfc_sym_get_dummy_args (ns->proc_name); formal; |
| formal = formal->next) |
| { |
| /* Ignore alternate returns. */ |
| if (formal->sym == NULL) |
| continue; |
| |
| /* We don't have a clever way of identifying arguments, so resort to |
| a brute-force search. */ |
| for (thunk_formal = gfc_sym_get_dummy_args (thunk_sym); |
| thunk_formal; |
| thunk_formal = thunk_formal->next) |
| { |
| if (thunk_formal->sym == formal->sym) |
| break; |
| } |
| |
| if (thunk_formal) |
| { |
| /* Pass the argument. */ |
| DECL_ARTIFICIAL (thunk_formal->sym->backend_decl) = 1; |
| vec_safe_push (args, thunk_formal->sym->backend_decl); |
| if (formal->sym->ts.type == BT_CHARACTER) |
| { |
| tmp = thunk_formal->sym->ts.u.cl->backend_decl; |
| vec_safe_push (string_args, tmp); |
| } |
| } |
| else |
| { |
| /* Pass NULL for a missing argument. */ |
| vec_safe_push (args, null_pointer_node); |
| if (formal->sym->ts.type == BT_CHARACTER) |
| { |
| tmp = build_int_cst (gfc_charlen_type_node, 0); |
| vec_safe_push (string_args, tmp); |
| } |
| } |
| } |
| |
| /* Call the master function. */ |
| vec_safe_splice (args, string_args); |
| tmp = ns->proc_name->backend_decl; |
| tmp = build_call_expr_loc_vec (input_location, tmp, args); |
| if (ns->proc_name->attr.mixed_entry_master) |
| { |
| tree union_decl, field; |
| tree master_type = TREE_TYPE (ns->proc_name->backend_decl); |
| |
| union_decl = build_decl (input_location, |
| VAR_DECL, get_identifier ("__result"), |
| TREE_TYPE (master_type)); |
| DECL_ARTIFICIAL (union_decl) = 1; |
| DECL_EXTERNAL (union_decl) = 0; |
| TREE_PUBLIC (union_decl) = 0; |
| TREE_USED (union_decl) = 1; |
| layout_decl (union_decl, 0); |
| pushdecl (union_decl); |
| |
| DECL_CONTEXT (union_decl) = current_function_decl; |
| tmp = fold_build2_loc (input_location, MODIFY_EXPR, |
| TREE_TYPE (union_decl), union_decl, tmp); |
| gfc_add_expr_to_block (&body, tmp); |
| |
| for (field = TYPE_FIELDS (TREE_TYPE (union_decl)); |
| field; field = DECL_CHAIN (field)) |
