| /* Nested function decomposition for GIMPLE. |
| Copyright (C) 2004-2017 Free Software Foundation, Inc. |
| |
| 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/>. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "backend.h" |
| #include "target.h" |
| #include "rtl.h" |
| #include "tree.h" |
| #include "gimple.h" |
| #include "memmodel.h" |
| #include "tm_p.h" |
| #include "stringpool.h" |
| #include "cgraph.h" |
| #include "fold-const.h" |
| #include "stor-layout.h" |
| #include "tree-dump.h" |
| #include "tree-inline.h" |
| #include "gimplify.h" |
| #include "gimple-iterator.h" |
| #include "gimple-walk.h" |
| #include "tree-cfg.h" |
| #include "explow.h" |
| #include "langhooks.h" |
| #include "gimple-low.h" |
| #include "gomp-constants.h" |
| |
| |
| /* The object of this pass is to lower the representation of a set of nested |
| functions in order to expose all of the gory details of the various |
| nonlocal references. We want to do this sooner rather than later, in |
| order to give us more freedom in emitting all of the functions in question. |
| |
| Back in olden times, when gcc was young, we developed an insanely |
| complicated scheme whereby variables which were referenced nonlocally |
| were forced to live in the stack of the declaring function, and then |
| the nested functions magically discovered where these variables were |
| placed. In order for this scheme to function properly, it required |
| that the outer function be partially expanded, then we switch to |
| compiling the inner function, and once done with those we switch back |
| to compiling the outer function. Such delicate ordering requirements |
| makes it difficult to do whole translation unit optimizations |
| involving such functions. |
| |
| The implementation here is much more direct. Everything that can be |
| referenced by an inner function is a member of an explicitly created |
| structure herein called the "nonlocal frame struct". The incoming |
| static chain for a nested function is a pointer to this struct in |
| the parent. In this way, we settle on known offsets from a known |
| base, and so are decoupled from the logic that places objects in the |
| function's stack frame. More importantly, we don't have to wait for |
| that to happen -- since the compilation of the inner function is no |
| longer tied to a real stack frame, the nonlocal frame struct can be |
| allocated anywhere. Which means that the outer function is now |
| inlinable. |
| |
| Theory of operation here is very simple. Iterate over all the |
| statements in all the functions (depth first) several times, |
| allocating structures and fields on demand. In general we want to |
| examine inner functions first, so that we can avoid making changes |
| to outer functions which are unnecessary. |
| |
| The order of the passes matters a bit, in that later passes will be |
| skipped if it is discovered that the functions don't actually interact |
| at all. That is, they're nested in the lexical sense but could have |
| been written as independent functions without change. */ |
| |
| |
| struct nesting_info |
| { |
| struct nesting_info *outer; |
| struct nesting_info *inner; |
| struct nesting_info *next; |
| |
| hash_map<tree, tree> *field_map; |
| hash_map<tree, tree> *var_map; |
| hash_set<tree *> *mem_refs; |
| bitmap suppress_expansion; |
| |
| tree context; |
| tree new_local_var_chain; |
| tree debug_var_chain; |
| tree frame_type; |
| tree frame_decl; |
| tree chain_field; |
| tree chain_decl; |
| tree nl_goto_field; |
| |
| bool any_parm_remapped; |
| bool any_tramp_created; |
| bool any_descr_created; |
| char static_chain_added; |
| }; |
| |
| |
| /* Iterate over the nesting tree, starting with ROOT, depth first. */ |
| |
| static inline struct nesting_info * |
| iter_nestinfo_start (struct nesting_info *root) |
| { |
| while (root->inner) |
| root = root->inner; |
| return root; |
| } |
| |
| static inline struct nesting_info * |
| iter_nestinfo_next (struct nesting_info *node) |
| { |
| if (node->next) |
| return iter_nestinfo_start (node->next); |
| return node->outer; |
| } |
| |
| #define FOR_EACH_NEST_INFO(I, ROOT) \ |
| for ((I) = iter_nestinfo_start (ROOT); (I); (I) = iter_nestinfo_next (I)) |
| |
| /* Obstack used for the bitmaps in the struct above. */ |
| static struct bitmap_obstack nesting_info_bitmap_obstack; |
| |
| |
| /* We're working in so many different function contexts simultaneously, |
| that create_tmp_var is dangerous. Prevent mishap. */ |
| #define create_tmp_var cant_use_create_tmp_var_here_dummy |
| |
| /* Like create_tmp_var, except record the variable for registration at |
| the given nesting level. */ |
| |
| static tree |
| create_tmp_var_for (struct nesting_info *info, tree type, const char *prefix) |
| { |
| tree tmp_var; |
| |
| /* If the type is of variable size or a type which must be created by the |
| frontend, something is wrong. Note that we explicitly allow |
| incomplete types here, since we create them ourselves here. */ |
| gcc_assert (!TREE_ADDRESSABLE (type)); |
| gcc_assert (!TYPE_SIZE_UNIT (type) |
| || TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST); |
| |
| tmp_var = create_tmp_var_raw (type, prefix); |
| DECL_CONTEXT (tmp_var) = info->context; |
| DECL_CHAIN (tmp_var) = info->new_local_var_chain; |
| DECL_SEEN_IN_BIND_EXPR_P (tmp_var) = 1; |
| if (TREE_CODE (type) == COMPLEX_TYPE |
| || TREE_CODE (type) == VECTOR_TYPE) |
| DECL_GIMPLE_REG_P (tmp_var) = 1; |
| |
| info->new_local_var_chain = tmp_var; |
| |
| return tmp_var; |
| } |
| |
| /* Take the address of EXP to be used within function CONTEXT. |
| Mark it for addressability as necessary. */ |
| |
| tree |
| build_addr (tree exp) |
| { |
| mark_addressable (exp); |
| return build_fold_addr_expr (exp); |
| } |
| |
| /* Insert FIELD into TYPE, sorted by alignment requirements. */ |
| |
| void |
| insert_field_into_struct (tree type, tree field) |
| { |
| tree *p; |
| |
| DECL_CONTEXT (field) = type; |
| |
| for (p = &TYPE_FIELDS (type); *p ; p = &DECL_CHAIN (*p)) |
| if (DECL_ALIGN (field) >= DECL_ALIGN (*p)) |
| break; |
| |
| DECL_CHAIN (field) = *p; |
| *p = field; |
| |
| /* Set correct alignment for frame struct type. */ |
| if (TYPE_ALIGN (type) < DECL_ALIGN (field)) |
| SET_TYPE_ALIGN (type, DECL_ALIGN (field)); |
| } |
| |
| /* Build or return the RECORD_TYPE that describes the frame state that is |
| shared between INFO->CONTEXT and its nested functions. This record will |
| not be complete until finalize_nesting_tree; up until that point we'll |
| be adding fields as necessary. |
| |
| We also build the DECL that represents this frame in the function. */ |
| |
| static tree |
| get_frame_type (struct nesting_info *info) |
| { |
| tree type = info->frame_type; |
| if (!type) |
| { |
| char *name; |
| |
| type = make_node (RECORD_TYPE); |
| |
| name = concat ("FRAME.", |
| IDENTIFIER_POINTER (DECL_NAME (info->context)), |
| NULL); |
| TYPE_NAME (type) = get_identifier (name); |
| free (name); |
| |
| info->frame_type = type; |
| info->frame_decl = create_tmp_var_for (info, type, "FRAME"); |
| DECL_NONLOCAL_FRAME (info->frame_decl) = 1; |
| |
| /* ??? Always make it addressable for now, since it is meant to |
| be pointed to by the static chain pointer. This pessimizes |
| when it turns out that no static chains are needed because |
| the nested functions referencing non-local variables are not |
| reachable, but the true pessimization is to create the non- |
| local frame structure in the first place. */ |
| TREE_ADDRESSABLE (info->frame_decl) = 1; |
| } |
| return type; |
| } |
| |
| /* Return true if DECL should be referenced by pointer in the non-local |
| frame structure. */ |
| |
| static bool |
| use_pointer_in_frame (tree decl) |
| { |
| if (TREE_CODE (decl) == PARM_DECL) |
| { |
| /* It's illegal to copy TREE_ADDRESSABLE, impossible to copy variable |
| sized decls, and inefficient to copy large aggregates. Don't bother |
| moving anything but scalar variables. */ |
| return AGGREGATE_TYPE_P (TREE_TYPE (decl)); |
| } |
| else |
| { |
| /* Variable sized types make things "interesting" in the frame. */ |
| return DECL_SIZE (decl) == NULL || !TREE_CONSTANT (DECL_SIZE (decl)); |
| } |
| } |
| |
| /* Given DECL, a non-locally accessed variable, find or create a field |
| in the non-local frame structure for the given nesting context. */ |
| |
| static tree |
| lookup_field_for_decl (struct nesting_info *info, tree decl, |
| enum insert_option insert) |
| { |
| if (insert == NO_INSERT) |
| { |
| tree *slot = info->field_map->get (decl); |
| return slot ? *slot : NULL_TREE; |
| } |
| |
| tree *slot = &info->field_map->get_or_insert (decl); |
| if (!*slot) |
| { |
| tree field = make_node (FIELD_DECL); |
| DECL_NAME (field) = DECL_NAME (decl); |
| |
| if (use_pointer_in_frame (decl)) |
| { |
| TREE_TYPE (field) = build_pointer_type (TREE_TYPE (decl)); |
| SET_DECL_ALIGN (field, TYPE_ALIGN (TREE_TYPE (field))); |
| DECL_NONADDRESSABLE_P (field) = 1; |
| } |
| else |
| { |
| TREE_TYPE (field) = TREE_TYPE (decl); |
| DECL_SOURCE_LOCATION (field) = DECL_SOURCE_LOCATION (decl); |
| SET_DECL_ALIGN (field, DECL_ALIGN (decl)); |
| DECL_USER_ALIGN (field) = DECL_USER_ALIGN (decl); |
| TREE_ADDRESSABLE (field) = TREE_ADDRESSABLE (decl); |
| DECL_NONADDRESSABLE_P (field) = !TREE_ADDRESSABLE (decl); |
| TREE_THIS_VOLATILE (field) = TREE_THIS_VOLATILE (decl); |
| } |
| |
| insert_field_into_struct (get_frame_type (info), field); |
| *slot = field; |
| |
| if (TREE_CODE (decl) == PARM_DECL) |
| info->any_parm_remapped = true; |
| } |
| |
| return *slot; |
| } |
| |
| /* Build or return the variable that holds the static chain within |
| INFO->CONTEXT. This variable may only be used within INFO->CONTEXT. */ |
| |
| static tree |
| get_chain_decl (struct nesting_info *info) |
| { |
| tree decl = info->chain_decl; |
| |
| if (!decl) |
| { |
| tree type; |
| |
| type = get_frame_type (info->outer); |
| type = build_pointer_type (type); |
| |
| /* Note that this variable is *not* entered into any BIND_EXPR; |
| the construction of this variable is handled specially in |
| expand_function_start and initialize_inlined_parameters. |
| Note also that it's represented as a parameter. This is more |
| close to the truth, since the initial value does come from |
| the caller. */ |
| decl = build_decl (DECL_SOURCE_LOCATION (info->context), |
| PARM_DECL, create_tmp_var_name ("CHAIN"), type); |
| DECL_ARTIFICIAL (decl) = 1; |
| DECL_IGNORED_P (decl) = 1; |
| TREE_USED (decl) = 1; |
| DECL_CONTEXT (decl) = info->context; |
| DECL_ARG_TYPE (decl) = type; |
| |
| /* Tell tree-inline.c that we never write to this variable, so |
| it can copy-prop the replacement value immediately. */ |
| TREE_READONLY (decl) = 1; |
| |
| info->chain_decl = decl; |
| |
| if (dump_file |
| && (dump_flags & TDF_DETAILS) |
| && !DECL_STATIC_CHAIN (info->context)) |
| fprintf (dump_file, "Setting static-chain for %s\n", |
| lang_hooks.decl_printable_name (info->context, 2)); |
| |
| DECL_STATIC_CHAIN (info->context) = 1; |
| } |
| return decl; |
| } |
| |
| /* Build or return the field within the non-local frame state that holds |
| the static chain for INFO->CONTEXT. This is the way to walk back up |
| multiple nesting levels. */ |
| |
| static tree |
| get_chain_field (struct nesting_info *info) |
| { |
| tree field = info->chain_field; |
| |
| if (!field) |
| { |
| tree type = build_pointer_type (get_frame_type (info->outer)); |
| |
| field = make_node (FIELD_DECL); |
| DECL_NAME (field) = get_identifier ("__chain"); |
| TREE_TYPE (field) = type; |
| SET_DECL_ALIGN (field, TYPE_ALIGN (type)); |
| DECL_NONADDRESSABLE_P (field) = 1; |
| |
| insert_field_into_struct (get_frame_type (info), field); |
| |
| info->chain_field = field; |
| |
| if (dump_file |
| && (dump_flags & TDF_DETAILS) |
| && !DECL_STATIC_CHAIN (info->context)) |
| fprintf (dump_file, "Setting static-chain for %s\n", |
| lang_hooks.decl_printable_name (info->context, 2)); |
| |
| DECL_STATIC_CHAIN (info->context) = 1; |
| } |
| return field; |
| } |
| |
| /* Initialize a new temporary with the GIMPLE_CALL STMT. */ |
| |
| static tree |
| init_tmp_var_with_call (struct nesting_info *info, gimple_stmt_iterator *gsi, |
| gcall *call) |
| { |
| tree t; |
| |
| t = create_tmp_var_for (info, gimple_call_return_type (call), NULL); |
| gimple_call_set_lhs (call, t); |
| if (! gsi_end_p (*gsi)) |
| gimple_set_location (call, gimple_location (gsi_stmt (*gsi))); |
| gsi_insert_before (gsi, call, GSI_SAME_STMT); |
| |
| return t; |
| } |
| |
| |
| /* Copy EXP into a temporary. Allocate the temporary in the context of |
| INFO and insert the initialization statement before GSI. */ |
| |
| static tree |
| init_tmp_var (struct nesting_info *info, tree exp, gimple_stmt_iterator *gsi) |
| { |
| tree t; |
| gimple *stmt; |
| |
| t = create_tmp_var_for (info, TREE_TYPE (exp), NULL); |
| stmt = gimple_build_assign (t, exp); |
| if (! gsi_end_p (*gsi)) |
| gimple_set_location (stmt, gimple_location (gsi_stmt (*gsi))); |
| gsi_insert_before_without_update (gsi, stmt, GSI_SAME_STMT); |
| |
| return t; |
| } |
| |
| |
| /* Similarly, but only do so to force EXP to satisfy is_gimple_val. */ |
| |
| static tree |
| gsi_gimplify_val (struct nesting_info *info, tree exp, |
| gimple_stmt_iterator *gsi) |
| { |
| if (is_gimple_val (exp)) |
| return exp; |
| else |
| return init_tmp_var (info, exp, gsi); |
| } |
| |
| /* Similarly, but copy from the temporary and insert the statement |
| after the iterator. */ |
| |
| static tree |
| save_tmp_var (struct nesting_info *info, tree exp, gimple_stmt_iterator *gsi) |
| { |
| tree t; |
| gimple *stmt; |
| |
| t = create_tmp_var_for (info, TREE_TYPE (exp), NULL); |
| stmt = gimple_build_assign (exp, t); |
| if (! gsi_end_p (*gsi)) |
| gimple_set_location (stmt, gimple_location (gsi_stmt (*gsi))); |
| gsi_insert_after_without_update (gsi, stmt, GSI_SAME_STMT); |
| |
| return t; |
| } |
| |
| /* Build or return the type used to represent a nested function trampoline. */ |
| |
| static GTY(()) tree trampoline_type; |
| |
| static tree |
| get_trampoline_type (struct nesting_info *info) |
| { |
| unsigned align, size; |
| tree t; |
| |
| if (trampoline_type) |
| return trampoline_type; |
| |
| align = TRAMPOLINE_ALIGNMENT; |
| size = TRAMPOLINE_SIZE; |
| |
| /* If we won't be able to guarantee alignment simply via TYPE_ALIGN, |
| then allocate extra space so that we can do dynamic alignment. */ |
| if (align > STACK_BOUNDARY) |
| { |
| size += ((align/BITS_PER_UNIT) - 1) & -(STACK_BOUNDARY/BITS_PER_UNIT); |
| align = STACK_BOUNDARY; |
| } |
| |
| t = build_index_type (size_int (size - 1)); |
| t = build_array_type (char_type_node, t); |
| t = build_decl (DECL_SOURCE_LOCATION (info->context), |
| FIELD_DECL, get_identifier ("__data"), t); |
| SET_DECL_ALIGN (t, align); |
| DECL_USER_ALIGN (t) = 1; |
| |
| trampoline_type = make_node (RECORD_TYPE); |
| TYPE_NAME (trampoline_type) = get_identifier ("__builtin_trampoline"); |
| TYPE_FIELDS (trampoline_type) = t; |
| layout_type (trampoline_type); |
| DECL_CONTEXT (t) = trampoline_type; |
| |
| return trampoline_type; |
| } |
| |
| /* Build or return the type used to represent a nested function descriptor. */ |
| |
| static GTY(()) tree descriptor_type; |
| |
| static tree |
| get_descriptor_type (struct nesting_info *info) |
| { |
| /* The base alignment is that of a function. */ |
| const unsigned align = FUNCTION_ALIGNMENT (FUNCTION_BOUNDARY); |
| tree t; |
| |
| if (descriptor_type) |
| return descriptor_type; |
| |
| t = build_index_type (integer_one_node); |
| t = build_array_type (ptr_type_node, t); |
| t = build_decl (DECL_SOURCE_LOCATION (info->context), |
| FIELD_DECL, get_identifier ("__data"), t); |
| SET_DECL_ALIGN (t, MAX (TYPE_ALIGN (ptr_type_node), align)); |
| DECL_USER_ALIGN (t) = 1; |
| |
| descriptor_type = make_node (RECORD_TYPE); |
| TYPE_NAME (descriptor_type) = get_identifier ("__builtin_descriptor"); |
| TYPE_FIELDS (descriptor_type) = t; |
| layout_type (descriptor_type); |
| DECL_CONTEXT (t) = descriptor_type; |
| |
| return descriptor_type; |
| } |
| |
| /* Given DECL, a nested function, find or create an element in the |
| var map for this function. */ |
| |
| static tree |
| lookup_element_for_decl (struct nesting_info *info, tree decl, |
| enum insert_option insert) |
| { |
| if (insert == NO_INSERT) |
| { |
| tree *slot = info->var_map->get (decl); |
| return slot ? *slot : NULL_TREE; |
| } |
| |
| tree *slot = &info->var_map->get_or_insert (decl); |
| if (!*slot) |
| *slot = build_tree_list (NULL_TREE, NULL_TREE); |
| |
| return (tree) *slot; |
| } |
| |
| /* Given DECL, a nested function, create a field in the non-local |
| frame structure for this function. */ |
| |
| static tree |
| create_field_for_decl (struct nesting_info *info, tree decl, tree type) |
| { |
| tree field = make_node (FIELD_DECL); |
| DECL_NAME (field) = DECL_NAME (decl); |
| TREE_TYPE (field) = type; |
| TREE_ADDRESSABLE (field) = 1; |
| insert_field_into_struct (get_frame_type (info), field); |
| return field; |
| } |
| |
| /* Given DECL, a nested function, find or create a field in the non-local |
| frame structure for a trampoline for this function. */ |
| |
| static tree |
| lookup_tramp_for_decl (struct nesting_info *info, tree decl, |
| enum insert_option insert) |
| { |
| tree elt, field; |
| |
| elt = lookup_element_for_decl (info, decl, insert); |
| if (!elt) |
| return NULL_TREE; |
| |
| field = TREE_PURPOSE (elt); |
| |
| if (!field && insert == INSERT) |
| { |
| field = create_field_for_decl (info, decl, get_trampoline_type (info)); |
| TREE_PURPOSE (elt) = field; |
| info->any_tramp_created = true; |
| } |
| |
| return field; |
| } |
| |
| /* Given DECL, a nested function, find or create a field in the non-local |
| frame structure for a descriptor for this function. */ |
| |
| static tree |
| lookup_descr_for_decl (struct nesting_info *info, tree decl, |
| enum insert_option insert) |
| { |
| tree elt, field; |
| |
| elt = lookup_element_for_decl (info, decl, insert); |
| if (!elt) |
| return NULL_TREE; |
| |
| field = TREE_VALUE (elt); |
| |
| if (!field && insert == INSERT) |
| { |
| field = create_field_for_decl (info, decl, get_descriptor_type (info)); |
| TREE_VALUE (elt) = field; |
| info->any_descr_created = true; |
| } |
| |
| return field; |
| } |
| |
| /* Build or return the field within the non-local frame state that holds |
| the non-local goto "jmp_buf". The buffer itself is maintained by the |
| rtl middle-end as dynamic stack space is allocated. */ |
| |
| static tree |
| get_nl_goto_field (struct nesting_info *info) |
| { |
| tree field = info->nl_goto_field; |
| if (!field) |
| { |
| unsigned size; |
| tree type; |
| |
| /* For __builtin_nonlocal_goto, we need N words. The first is the |
| frame pointer, the rest is for the target's stack pointer save |
| area. The number of words is controlled by STACK_SAVEAREA_MODE; |
| not the best interface, but it'll do for now. */ |
| if (Pmode == ptr_mode) |
| type = ptr_type_node; |
| else |
| type = lang_hooks.types.type_for_mode (Pmode, 1); |
| |
| size = GET_MODE_SIZE (STACK_SAVEAREA_MODE (SAVE_NONLOCAL)); |
| size = size / GET_MODE_SIZE (Pmode); |
| size = size + 1; |
| |
| type = build_array_type |
| (type, build_index_type (size_int (size))); |
| |
| field = make_node (FIELD_DECL); |
| DECL_NAME (field) = get_identifier ("__nl_goto_buf"); |
| TREE_TYPE (field) = type; |
| SET_DECL_ALIGN (field, TYPE_ALIGN (type)); |
| TREE_ADDRESSABLE (field) = 1; |
| |
| insert_field_into_struct (get_frame_type (info), field); |
| |
| info->nl_goto_field = field; |
| } |
| |
| return field; |
| } |
| |
| /* Invoke CALLBACK on all statements of GIMPLE sequence *PSEQ. */ |
| |
| static void |
| walk_body (walk_stmt_fn callback_stmt, walk_tree_fn callback_op, |
| struct nesting_info *info, gimple_seq *pseq) |
| { |
| struct walk_stmt_info wi; |
| |
| memset (&wi, 0, sizeof (wi)); |
| wi.info = info; |
| wi.val_only = true; |
| walk_gimple_seq_mod (pseq, callback_stmt, callback_op, &wi); |
| } |
| |
| |
| /* Invoke CALLBACK_STMT/CALLBACK_OP on all statements of INFO->CONTEXT. */ |
| |
| static inline void |
| walk_function (walk_stmt_fn callback_stmt, walk_tree_fn callback_op, |
| struct nesting_info *info) |
| { |
| gimple_seq body = gimple_body (info->context); |
| walk_body (callback_stmt, callback_op, info, &body); |
| gimple_set_body (info->context, body); |
| } |
| |
| /* Invoke CALLBACK on a GIMPLE_OMP_FOR's init, cond, incr and pre-body. */ |
| |
| static void |
| walk_gimple_omp_for (gomp_for *for_stmt, |
| walk_stmt_fn callback_stmt, walk_tree_fn callback_op, |
| struct nesting_info *info) |
| { |
| struct walk_stmt_info wi; |
| gimple_seq seq; |
| tree t; |
| size_t i; |
| |
| walk_body (callback_stmt, callback_op, info, gimple_omp_for_pre_body_ptr (for_stmt)); |
| |
| seq = NULL; |
| memset (&wi, 0, sizeof (wi)); |
| wi.info = info; |
| wi.gsi = gsi_last (seq); |
| |
| for (i = 0; i < gimple_omp_for_collapse (for_stmt); i++) |
| { |
| wi.val_only = false; |
| walk_tree (gimple_omp_for_index_ptr (for_stmt, i), callback_op, |
| &wi, NULL); |
| wi.val_only = true; |
| wi.is_lhs = false; |
| walk_tree (gimple_omp_for_initial_ptr (for_stmt, i), callback_op, |
| &wi, NULL); |
| |
| wi.val_only = true; |
| wi.is_lhs = false; |
| walk_tree (gimple_omp_for_final_ptr (for_stmt, i), callback_op, |
| &wi, NULL); |
| |
| t = gimple_omp_for_incr (for_stmt, i); |
| gcc_assert (BINARY_CLASS_P (t)); |
| wi.val_only = false; |
| walk_tree (&TREE_OPERAND (t, 0), callback_op, &wi, NULL); |
| wi.val_only = true; |
| wi.is_lhs = false; |
| walk_tree (&TREE_OPERAND (t, 1), callback_op, &wi, NULL); |
| } |
| |
| seq = gsi_seq (wi.gsi); |
| if (!gimple_seq_empty_p (seq)) |
| { |
| gimple_seq pre_body = gimple_omp_for_pre_body (for_stmt); |
| annotate_all_with_location (seq, gimple_location (for_stmt)); |
| gimple_seq_add_seq (&pre_body, seq); |
| gimple_omp_for_set_pre_body (for_stmt, pre_body); |
| } |
| } |
| |
| /* Similarly for ROOT and all functions nested underneath, depth first. */ |
| |
| static void |
| walk_all_functions (walk_stmt_fn callback_stmt, walk_tree_fn callback_op, |
| struct nesting_info *root) |
| { |
| struct nesting_info *n; |
| FOR_EACH_NEST_INFO (n, root) |
| walk_function (callback_stmt, callback_op, n); |
| } |
| |
| |
| /* We have to check for a fairly pathological case. The operands of function |
| nested function are to be interpreted in the context of the enclosing |
| function. So if any are variably-sized, they will get remapped when the |
| enclosing function is inlined. But that remapping would also have to be |
| done in the types of the PARM_DECLs of the nested function, meaning the |
| argument types of that function will disagree with the arguments in the |
| calls to that function. So we'd either have to make a copy of the nested |
| function corresponding to each time the enclosing function was inlined or |
| add a VIEW_CONVERT_EXPR to each such operand for each call to the nested |
| function. The former is not practical. The latter would still require |
| detecting this case to know when to add the conversions. So, for now at |
| least, we don't inline such an enclosing function. |
| |
| We have to do that check recursively, so here return indicating whether |
| FNDECL has such a nested function. ORIG_FN is the function we were |
| trying to inline to use for checking whether any argument is variably |
| modified by anything in it. |
| |
| It would be better to do this in tree-inline.c so that we could give |
| the appropriate warning for why a function can't be inlined, but that's |
| too late since the nesting structure has already been flattened and |
| adding a flag just to record this fact seems a waste of a flag. */ |
| |
| static bool |
| check_for_nested_with_variably_modified (tree fndecl, tree orig_fndecl) |
| { |
| struct cgraph_node *cgn = cgraph_node::get (fndecl); |
| tree arg; |
| |
| for (cgn = cgn->nested; cgn ; cgn = cgn->next_nested) |
| { |
| for (arg = DECL_ARGUMENTS (cgn->decl); arg; arg = DECL_CHAIN (arg)) |
| if (variably_modified_type_p (TREE_TYPE (arg), orig_fndecl)) |
| return true; |
| |
| if (check_for_nested_with_variably_modified (cgn->decl, |
| orig_fndecl)) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /* Construct our local datastructure describing the function nesting |
| tree rooted by CGN. */ |
| |
| static struct nesting_info * |
| create_nesting_tree (struct cgraph_node *cgn) |
| { |
| struct nesting_info *info = XCNEW (struct nesting_info); |
| info->field_map = new hash_map<tree, tree>; |
| info->var_map = new hash_map<tree, tree>; |
| info->mem_refs = new hash_set<tree *>; |
| info->suppress_expansion = BITMAP_ALLOC (&nesting_info_bitmap_obstack); |
| info->context = cgn->decl; |
| |
| for (cgn = cgn->nested; cgn ; cgn = cgn->next_nested) |
| { |
| struct nesting_info *sub = create_nesting_tree (cgn); |
| sub->outer = info; |
| sub->next = info->inner; |
| info->inner = sub; |
| } |
| |
| /* See discussion at check_for_nested_with_variably_modified for a |
| discussion of why this has to be here. */ |
| if (check_for_nested_with_variably_modified (info->context, info->context)) |
| DECL_UNINLINABLE (info->context) = true; |
| |
| return info; |
| } |
| |
| /* Return an expression computing the static chain for TARGET_CONTEXT |
| from INFO->CONTEXT. Insert any necessary computations before TSI. */ |
| |
| static tree |
| get_static_chain (struct nesting_info *info, tree target_context, |
| gimple_stmt_iterator *gsi) |
| { |
| struct nesting_info *i; |
| tree x; |
| |
| if (info->context == target_context) |
| { |
| x = build_addr (info->frame_decl); |
| info->static_chain_added |= 1; |
| } |
| else |
| { |
| x = get_chain_decl (info); |
| info->static_chain_added |= 2; |
| |
| for (i = info->outer; i->context != target_context; i = i->outer) |
| { |
| tree field = get_chain_field (i); |
| |
| x = build_simple_mem_ref (x); |
| x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); |
| x = init_tmp_var (info, x, gsi); |
| } |
| } |
| |
| return x; |
| } |
| |
| |
| /* Return an expression referencing FIELD from TARGET_CONTEXT's non-local |
| frame as seen from INFO->CONTEXT. Insert any necessary computations |
| before GSI. */ |
| |
| static tree |
| get_frame_field (struct nesting_info *info, tree target_context, |
| tree field, gimple_stmt_iterator *gsi) |
| { |
| struct nesting_info *i; |
| tree x; |
| |
| if (info->context == target_context) |
| { |
| /* Make sure frame_decl gets created. */ |
| (void) get_frame_type (info); |
| x = info->frame_decl; |
| info->static_chain_added |= 1; |
| } |
| else |
| { |
| x = get_chain_decl (info); |
| info->static_chain_added |= 2; |
| |
| for (i = info->outer; i->context != target_context; i = i->outer) |
| { |
| tree field = get_chain_field (i); |
| |
| x = build_simple_mem_ref (x); |
| x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); |
| x = init_tmp_var (info, x, gsi); |
| } |
| |
| x = build_simple_mem_ref (x); |
| } |
| |
| x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); |
| return x; |
| } |
| |
| static void note_nonlocal_vla_type (struct nesting_info *info, tree type); |
| |
| /* A subroutine of convert_nonlocal_reference_op. Create a local variable |
| in the nested function with DECL_VALUE_EXPR set to reference the true |
| variable in the parent function. This is used both for debug info |
| and in OMP lowering. */ |
| |
| static tree |
| get_nonlocal_debug_decl (struct nesting_info *info, tree decl) |
| { |
| tree target_context; |
| struct nesting_info *i; |
| tree x, field, new_decl; |
| |
| tree *slot = &info->var_map->get_or_insert (decl); |
| |
| if (*slot) |
| return *slot; |
| |
| target_context = decl_function_context (decl); |
| |
| /* A copy of the code in get_frame_field, but without the temporaries. */ |
| if (info->context == target_context) |
| { |
| /* Make sure frame_decl gets created. */ |
| (void) get_frame_type (info); |
| x = info->frame_decl; |
| i = info; |
| info->static_chain_added |= 1; |
| } |
| else |
| { |
| x = get_chain_decl (info); |
| info->static_chain_added |= 2; |
| for (i = info->outer; i->context != target_context; i = i->outer) |
| { |
| field = get_chain_field (i); |
| x = build_simple_mem_ref (x); |
| x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); |
| } |
| x = build_simple_mem_ref (x); |
| } |
| |
| field = lookup_field_for_decl (i, decl, INSERT); |
| x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); |
| if (use_pointer_in_frame (decl)) |
| x = build_simple_mem_ref (x); |
| |
| /* ??? We should be remapping types as well, surely. */ |
| new_decl = build_decl (DECL_SOURCE_LOCATION (decl), |
| VAR_DECL, DECL_NAME (decl), TREE_TYPE (decl)); |
| DECL_CONTEXT (new_decl) = info->context; |
| DECL_ARTIFICIAL (new_decl) = DECL_ARTIFICIAL (decl); |
| DECL_IGNORED_P (new_decl) = DECL_IGNORED_P (decl); |
| TREE_THIS_VOLATILE (new_decl) = TREE_THIS_VOLATILE (decl); |
| TREE_SIDE_EFFECTS (new_decl) = TREE_SIDE_EFFECTS (decl); |
| TREE_READONLY (new_decl) = TREE_READONLY (decl); |
| TREE_ADDRESSABLE (new_decl) = TREE_ADDRESSABLE (decl); |
| DECL_SEEN_IN_BIND_EXPR_P (new_decl) = 1; |
| if ((TREE_CODE (decl) == PARM_DECL |
| || TREE_CODE (decl) == RESULT_DECL |
| || VAR_P (decl)) |
| && DECL_BY_REFERENCE (decl)) |
| DECL_BY_REFERENCE (new_decl) = 1; |
| |
| SET_DECL_VALUE_EXPR (new_decl, x); |
| DECL_HAS_VALUE_EXPR_P (new_decl) = 1; |
| |
| *slot = new_decl; |
| DECL_CHAIN (new_decl) = info->debug_var_chain; |
| info->debug_var_chain = new_decl; |
| |
| if (!optimize |
| && info->context != target_context |
| && variably_modified_type_p (TREE_TYPE (decl), NULL)) |
| note_nonlocal_vla_type (info, TREE_TYPE (decl)); |
| |
| return new_decl; |
| } |
| |
| |
| /* Callback for walk_gimple_stmt, rewrite all references to VAR |
| and PARM_DECLs that belong to outer functions. |
| |
| The rewrite will involve some number of structure accesses back up |
| the static chain. E.g. for a variable FOO up one nesting level it'll |
| be CHAIN->FOO. For two levels it'll be CHAIN->__chain->FOO. Further |
| indirections apply to decls for which use_pointer_in_frame is true. */ |
| |
| static tree |
| convert_nonlocal_reference_op (tree *tp, int *walk_subtrees, void *data) |
| { |
| struct walk_stmt_info *wi = (struct walk_stmt_info *) data; |
| struct nesting_info *const info = (struct nesting_info *) wi->info; |
| tree t = *tp; |
| |
| *walk_subtrees = 0; |
| switch (TREE_CODE (t)) |
| { |
| case VAR_DECL: |
| /* Non-automatic variables are never processed. */ |
| if (TREE_STATIC (t) || DECL_EXTERNAL (t)) |
| break; |
| /* FALLTHRU */ |
| |
| case PARM_DECL: |
| if (decl_function_context (t) != info->context) |
| { |
| tree x; |
| wi->changed = true; |
| |
| x = get_nonlocal_debug_decl (info, t); |
| if (!bitmap_bit_p (info->suppress_expansion, DECL_UID (t))) |
| { |
| tree target_context = decl_function_context (t); |
| struct nesting_info *i; |
| for (i = info->outer; i->context != target_context; i = i->outer) |
| continue; |
| x = lookup_field_for_decl (i, t, INSERT); |
| x = get_frame_field (info, target_context, x, &wi->gsi); |
| if (use_pointer_in_frame (t)) |
| { |
| x = init_tmp_var (info, x, &wi->gsi); |
| x = build_simple_mem_ref (x); |
| } |
| } |
| |
| if (wi->val_only) |
| { |
| if (wi->is_lhs) |
| x = save_tmp_var (info, x, &wi->gsi); |
| else |
| x = init_tmp_var (info, x, &wi->gsi); |
| } |
| |
| *tp = x; |
| } |
| break; |
| |
| case LABEL_DECL: |
| /* We're taking the address of a label from a parent function, but |
| this is not itself a non-local goto. Mark the label such that it |
| will not be deleted, much as we would with a label address in |
| static storage. */ |
| if (decl_function_context (t) != info->context) |
| FORCED_LABEL (t) = 1; |
| break; |
| |
| case ADDR_EXPR: |
| { |
| bool save_val_only = wi->val_only; |
| |
| wi->val_only = false; |
| wi->is_lhs = false; |
| wi->changed = false; |
| walk_tree (&TREE_OPERAND (t, 0), convert_nonlocal_reference_op, wi, 0); |
| wi->val_only = true; |
| |
| if (wi->changed) |
| { |
| tree save_context; |
| |
| /* If we changed anything, we might no longer be directly |
| referencing a decl. */ |
| save_context = current_function_decl; |
| current_function_decl = info->context; |
| recompute_tree_invariant_for_addr_expr (t); |
| current_function_decl = save_context; |
| |
| /* If the callback converted the address argument in a context |
| where we only accept variables (and min_invariant, presumably), |
| then compute the address into a temporary. */ |
| if (save_val_only) |
| *tp = gsi_gimplify_val ((struct nesting_info *) wi->info, |
| t, &wi->gsi); |
| } |
| } |
| break; |
| |
| case REALPART_EXPR: |
| case IMAGPART_EXPR: |
| case COMPONENT_REF: |
| case ARRAY_REF: |
| case ARRAY_RANGE_REF: |
| case BIT_FIELD_REF: |
| /* Go down this entire nest and just look at the final prefix and |
| anything that describes the references. Otherwise, we lose track |
| of whether a NOP_EXPR or VIEW_CONVERT_EXPR needs a simple value. */ |
| wi->val_only = true; |
| wi->is_lhs = false; |
| for (; handled_component_p (t); tp = &TREE_OPERAND (t, 0), t = *tp) |
| { |
| if (TREE_CODE (t) == COMPONENT_REF) |
| walk_tree (&TREE_OPERAND (t, 2), convert_nonlocal_reference_op, wi, |
| NULL); |
| else if (TREE_CODE (t) == ARRAY_REF |
| || TREE_CODE (t) == ARRAY_RANGE_REF) |
| { |
| walk_tree (&TREE_OPERAND (t, 1), convert_nonlocal_reference_op, |
| wi, NULL); |
| walk_tree (&TREE_OPERAND (t, 2), convert_nonlocal_reference_op, |
| wi, NULL); |
| walk_tree (&TREE_OPERAND (t, 3), convert_nonlocal_reference_op, |
| wi, NULL); |
| } |
| } |
| wi->val_only = false; |
| walk_tree (tp, convert_nonlocal_reference_op, wi, NULL); |
| break; |
| |
| case VIEW_CONVERT_EXPR: |
| /* Just request to look at the subtrees, leaving val_only and lhs |
| untouched. This might actually be for !val_only + lhs, in which |
| case we don't want to force a replacement by a temporary. */ |
| *walk_subtrees = 1; |
| break; |
| |
| default: |
| if (!IS_TYPE_OR_DECL_P (t)) |
| { |
| *walk_subtrees = 1; |
| wi->val_only = true; |
| wi->is_lhs = false; |
| } |
| break; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| static tree convert_nonlocal_reference_stmt (gimple_stmt_iterator *, bool *, |
| struct walk_stmt_info *); |
| |
| /* Helper for convert_nonlocal_references, rewrite all references to VAR |
| and PARM_DECLs that belong to outer functions. */ |
| |
| static bool |
| convert_nonlocal_omp_clauses (tree *pclauses, struct walk_stmt_info *wi) |
| { |
| struct nesting_info *const info = (struct nesting_info *) wi->info; |
| bool need_chain = false, need_stmts = false; |
| tree clause, decl; |
| int dummy; |
| bitmap new_suppress; |
| |
| new_suppress = BITMAP_GGC_ALLOC (); |
| bitmap_copy (new_suppress, info->suppress_expansion); |
| |
| for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause)) |
| { |
| switch (OMP_CLAUSE_CODE (clause)) |
| { |
| case OMP_CLAUSE_REDUCTION: |
| if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) |
| need_stmts = true; |
| goto do_decl_clause; |
| |
| case OMP_CLAUSE_LASTPRIVATE: |
| if (OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause)) |
| need_stmts = true; |
| goto do_decl_clause; |
| |
| case OMP_CLAUSE_LINEAR: |
| if (OMP_CLAUSE_LINEAR_GIMPLE_SEQ (clause)) |
| need_stmts = true; |
| wi->val_only = true; |
| wi->is_lhs = false; |
| convert_nonlocal_reference_op (&OMP_CLAUSE_LINEAR_STEP (clause), |
| &dummy, wi); |
| goto do_decl_clause; |
| |
| case OMP_CLAUSE_PRIVATE: |
| case OMP_CLAUSE_FIRSTPRIVATE: |
| case OMP_CLAUSE_COPYPRIVATE: |
| case OMP_CLAUSE_SHARED: |
| case OMP_CLAUSE_TO_DECLARE: |
| case OMP_CLAUSE_LINK: |
| case OMP_CLAUSE_USE_DEVICE_PTR: |
| case OMP_CLAUSE_IS_DEVICE_PTR: |
| do_decl_clause: |
| decl = OMP_CLAUSE_DECL (clause); |
| if (VAR_P (decl) |
| && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) |
| break; |
| if (decl_function_context (decl) != info->context) |
| { |
| if (OMP_CLAUSE_CODE (clause) == OMP_CLAUSE_SHARED) |
| OMP_CLAUSE_SHARED_READONLY (clause) = 0; |
| bitmap_set_bit (new_suppress, DECL_UID (decl)); |
| OMP_CLAUSE_DECL (clause) = get_nonlocal_debug_decl (info, decl); |
| if (OMP_CLAUSE_CODE (clause) != OMP_CLAUSE_PRIVATE) |
| need_chain = true; |
| } |
| break; |
| |
| case OMP_CLAUSE_SCHEDULE: |
| if (OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (clause) == NULL) |
| break; |
| /* FALLTHRU */ |
| case OMP_CLAUSE_FINAL: |
| case OMP_CLAUSE_IF: |
| case OMP_CLAUSE_NUM_THREADS: |
| case OMP_CLAUSE_DEPEND: |
| case OMP_CLAUSE_DEVICE: |
| case OMP_CLAUSE_NUM_TEAMS: |
| case OMP_CLAUSE_THREAD_LIMIT: |
| case OMP_CLAUSE_SAFELEN: |
| case OMP_CLAUSE_SIMDLEN: |
| case OMP_CLAUSE_PRIORITY: |
| case OMP_CLAUSE_GRAINSIZE: |
| case OMP_CLAUSE_NUM_TASKS: |
| case OMP_CLAUSE_HINT: |
| case OMP_CLAUSE__CILK_FOR_COUNT_: |
| case OMP_CLAUSE_NUM_GANGS: |
| case OMP_CLAUSE_NUM_WORKERS: |
| case OMP_CLAUSE_VECTOR_LENGTH: |
| case OMP_CLAUSE_GANG: |
| case OMP_CLAUSE_WORKER: |
| case OMP_CLAUSE_VECTOR: |
| case OMP_CLAUSE_ASYNC: |
| case OMP_CLAUSE_WAIT: |
| /* Several OpenACC clauses have optional arguments. Check if they |
| are present. */ |
| if (OMP_CLAUSE_OPERAND (clause, 0)) |
| { |
| wi->val_only = true; |
| wi->is_lhs = false; |
| convert_nonlocal_reference_op (&OMP_CLAUSE_OPERAND (clause, 0), |
| &dummy, wi); |
| } |
| |
| /* The gang clause accepts two arguments. */ |
| if (OMP_CLAUSE_CODE (clause) == OMP_CLAUSE_GANG |
| && OMP_CLAUSE_GANG_STATIC_EXPR (clause)) |
| { |
| wi->val_only = true; |
| wi->is_lhs = false; |
| convert_nonlocal_reference_op |
| (&OMP_CLAUSE_GANG_STATIC_EXPR (clause), &dummy, wi); |
| } |
| break; |
| |
| case OMP_CLAUSE_DIST_SCHEDULE: |
| if (OMP_CLAUSE_DIST_SCHEDULE_CHUNK_EXPR (clause) != NULL) |
| { |
| wi->val_only = true; |
| wi->is_lhs = false; |
| convert_nonlocal_reference_op (&OMP_CLAUSE_OPERAND (clause, 0), |
| &dummy, wi); |
| } |
| break; |
| |
| case OMP_CLAUSE_MAP: |
| case OMP_CLAUSE_TO: |
| case OMP_CLAUSE_FROM: |
| if (OMP_CLAUSE_SIZE (clause)) |
| { |
| wi->val_only = true; |
| wi->is_lhs = false; |
| convert_nonlocal_reference_op (&OMP_CLAUSE_SIZE (clause), |
| &dummy, wi); |
| } |
| if (DECL_P (OMP_CLAUSE_DECL (clause))) |
| goto do_decl_clause; |
| wi->val_only = true; |
| wi->is_lhs = false; |
| walk_tree (&OMP_CLAUSE_DECL (clause), convert_nonlocal_reference_op, |
| wi, NULL); |
| break; |
| |
| case OMP_CLAUSE_ALIGNED: |
| if (OMP_CLAUSE_ALIGNED_ALIGNMENT (clause)) |
| { |
| wi->val_only = true; |
| wi->is_lhs = false; |
| convert_nonlocal_reference_op |
| (&OMP_CLAUSE_ALIGNED_ALIGNMENT (clause), &dummy, wi); |
| } |
| /* Like do_decl_clause, but don't add any suppression. */ |
| decl = OMP_CLAUSE_DECL (clause); |
| if (VAR_P (decl) |
| && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) |
| break; |
| if (decl_function_context (decl) != info->context) |
| { |
| OMP_CLAUSE_DECL (clause) = get_nonlocal_debug_decl (info, decl); |
| if (OMP_CLAUSE_CODE (clause) != OMP_CLAUSE_PRIVATE) |
| need_chain = true; |
| } |
| break; |
| |
| case OMP_CLAUSE_NOWAIT: |
| case OMP_CLAUSE_ORDERED: |
| case OMP_CLAUSE_DEFAULT: |
| case OMP_CLAUSE_COPYIN: |
| case OMP_CLAUSE_COLLAPSE: |
| case OMP_CLAUSE_TILE: |
| case OMP_CLAUSE_UNTIED: |
| case OMP_CLAUSE_MERGEABLE: |
| case OMP_CLAUSE_PROC_BIND: |
| case OMP_CLAUSE_NOGROUP: |
| case OMP_CLAUSE_THREADS: |
| case OMP_CLAUSE_SIMD: |
| case OMP_CLAUSE_DEFAULTMAP: |
| case OMP_CLAUSE_SEQ: |
| case OMP_CLAUSE_INDEPENDENT: |
| case OMP_CLAUSE_AUTO: |
| break; |
| |
| /* The following clause belongs to the OpenACC cache directive, which |
| is discarded during gimplification. */ |
| case OMP_CLAUSE__CACHE_: |
| /* The following clauses are only allowed in the OpenMP declare simd |
| directive, so not seen here. */ |
| case OMP_CLAUSE_UNIFORM: |
| case OMP_CLAUSE_INBRANCH: |
| case OMP_CLAUSE_NOTINBRANCH: |
| /* The following clauses are only allowed on OpenMP cancel and |
| cancellation point directives, which at this point have already |
| been lowered into a function call. */ |
| case OMP_CLAUSE_FOR: |
| case OMP_CLAUSE_PARALLEL: |
| case OMP_CLAUSE_SECTIONS: |
| case OMP_CLAUSE_TASKGROUP: |
| /* The following clauses are only added during OMP lowering; nested |
| function decomposition happens before that. */ |
| case OMP_CLAUSE__LOOPTEMP_: |
| case OMP_CLAUSE__SIMDUID_: |
| case OMP_CLAUSE__GRIDDIM_: |
| /* Anything else. */ |
| default: |
| gcc_unreachable (); |
| } |
| } |
| |
| info->suppress_expansion = new_suppress; |
| |
| if (need_stmts) |
| for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause)) |
| switch (OMP_CLAUSE_CODE (clause)) |
| { |
| case OMP_CLAUSE_REDUCTION: |
| if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) |
| { |
| tree old_context |
| = DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)); |
| DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) |
| = info->context; |
| if (OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (clause)) |
| DECL_CONTEXT (OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (clause)) |
| = info->context; |
| walk_body (convert_nonlocal_reference_stmt, |
| convert_nonlocal_reference_op, info, |
| &OMP_CLAUSE_REDUCTION_GIMPLE_INIT (clause)); |
| walk_body (convert_nonlocal_reference_stmt, |
| convert_nonlocal_reference_op, info, |
| &OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (clause)); |
| DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) |
| = old_context; |
| if (OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (clause)) |
| DECL_CONTEXT (OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (clause)) |
| = old_context; |
| } |
| break; |
| |
| case OMP_CLAUSE_LASTPRIVATE: |
| walk_body (convert_nonlocal_reference_stmt, |
| convert_nonlocal_reference_op, info, |
| &OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause)); |
| break; |
| |
| case OMP_CLAUSE_LINEAR: |
| walk_body (convert_nonlocal_reference_stmt, |
| convert_nonlocal_reference_op, info, |
| &OMP_CLAUSE_LINEAR_GIMPLE_SEQ (clause)); |
| break; |
| |
| default: |
| break; |
| } |
| |
| return need_chain; |
| } |
| |
| /* Create nonlocal debug decls for nonlocal VLA array bounds. */ |
| |
| static void |
| note_nonlocal_vla_type (struct nesting_info *info, tree type) |
| { |
| while (POINTER_TYPE_P (type) && !TYPE_NAME (type)) |
| type = TREE_TYPE (type); |
| |
| if (TYPE_NAME (type) |
| && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
| && DECL_ORIGINAL_TYPE (TYPE_NAME (type))) |
| type = DECL_ORIGINAL_TYPE (TYPE_NAME (type)); |
| |
| while (POINTER_TYPE_P (type) |
| || TREE_CODE (type) == VECTOR_TYPE |
| || TREE_CODE (type) == FUNCTION_TYPE |
| || TREE_CODE (type) == METHOD_TYPE) |
| type = TREE_TYPE (type); |
| |
| if (TREE_CODE (type) == ARRAY_TYPE) |
| { |
| tree domain, t; |
| |
| note_nonlocal_vla_type (info, TREE_TYPE (type)); |
| domain = TYPE_DOMAIN (type); |
| if (domain) |
| { |
| t = TYPE_MIN_VALUE (domain); |
| if (t && (VAR_P (t) || TREE_CODE (t) == PARM_DECL) |
| && decl_function_context (t) != info->context) |
| get_nonlocal_debug_decl (info, t); |
| t = TYPE_MAX_VALUE (domain); |
| if (t && (VAR_P (t) || TREE_CODE (t) == PARM_DECL) |
| && decl_function_context (t) != info->context) |
| get_nonlocal_debug_decl (info, t); |
| } |
| } |
| } |
| |
| /* Create nonlocal debug decls for nonlocal VLA array bounds for VLAs |
| in BLOCK. */ |
| |
| static void |
| note_nonlocal_block_vlas (struct nesting_info *info, tree block) |
| { |
| tree var; |
| |
| for (var = BLOCK_VARS (block); var; var = DECL_CHAIN (var)) |
| if (VAR_P (var) |
| && variably_modified_type_p (TREE_TYPE (var), NULL) |
| && DECL_HAS_VALUE_EXPR_P (var) |
| && decl_function_context (var) != info->context) |
| note_nonlocal_vla_type (info, TREE_TYPE (var)); |
| } |
| |
| /* Callback for walk_gimple_stmt. Rewrite all references to VAR and |
| PARM_DECLs that belong to outer functions. This handles statements |
| that are not handled via the standard recursion done in |
| walk_gimple_stmt. STMT is the statement to examine, DATA is as in |
| convert_nonlocal_reference_op. Set *HANDLED_OPS_P to true if all the |
| operands of STMT have been handled by this function. */ |
| |
| static tree |
| convert_nonlocal_reference_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p, |
| struct walk_stmt_info *wi) |
| { |
| struct nesting_info *info = (struct nesting_info *) wi->info; |
| tree save_local_var_chain; |
| bitmap save_suppress; |
| gimple *stmt = gsi_stmt (*gsi); |
| |
| switch (gimple_code (stmt)) |
| { |
| case GIMPLE_GOTO: |
| /* Don't walk non-local gotos for now. */ |
| if (TREE_CODE (gimple_goto_dest (stmt)) != LABEL_DECL) |
| { |
| wi->val_only = true; |
| wi->is_lhs = false; |
| *handled_ops_p = false; |
| return NULL_TREE; |
| } |
| break; |
| |
| case GIMPLE_OMP_PARALLEL: |
| case GIMPLE_OMP_TASK: |
| save_suppress = info->suppress_expansion; |
| if (convert_nonlocal_omp_clauses (gimple_omp_taskreg_clauses_ptr (stmt), |
| wi)) |
| { |
| tree c, decl; |
| decl = get_chain_decl (info); |
| c = build_omp_clause (gimple_location (stmt), |
| OMP_CLAUSE_FIRSTPRIVATE); |
| OMP_CLAUSE_DECL (c) = decl; |
| OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt); |
| gimple_omp_taskreg_set_clauses (stmt, c); |
| } |
| |
| save_local_var_chain = info->new_local_var_chain; |
| info->new_local_var_chain = NULL; |
| |
| walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| |
| if (info->new_local_var_chain) |
| declare_vars (info->new_local_var_chain, |
| gimple_seq_first_stmt (gimple_omp_body (stmt)), |
| false); |
| info->new_local_var_chain = save_local_var_chain; |
| info->suppress_expansion = save_suppress; |
| break; |
| |
| case GIMPLE_OMP_FOR: |
| save_suppress = info->suppress_expansion; |
| convert_nonlocal_omp_clauses (gimple_omp_for_clauses_ptr (stmt), wi); |
| walk_gimple_omp_for (as_a <gomp_for *> (stmt), |
| convert_nonlocal_reference_stmt, |
| convert_nonlocal_reference_op, info); |
| walk_body (convert_nonlocal_reference_stmt, |
| convert_nonlocal_reference_op, info, gimple_omp_body_ptr (stmt)); |
| info->suppress_expansion = save_suppress; |
| break; |
| |
| case GIMPLE_OMP_SECTIONS: |
| save_suppress = info->suppress_expansion; |
| convert_nonlocal_omp_clauses (gimple_omp_sections_clauses_ptr (stmt), wi); |
| walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| info->suppress_expansion = save_suppress; |
| break; |
| |
| case GIMPLE_OMP_SINGLE: |
| save_suppress = info->suppress_expansion; |
| convert_nonlocal_omp_clauses (gimple_omp_single_clauses_ptr (stmt), wi); |
| walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| info->suppress_expansion = save_suppress; |
| break; |
| |
| case GIMPLE_OMP_TARGET: |
| if (!is_gimple_omp_offloaded (stmt)) |
| { |
| save_suppress = info->suppress_expansion; |
| convert_nonlocal_omp_clauses (gimple_omp_target_clauses_ptr (stmt), |
| wi); |
| info->suppress_expansion = save_suppress; |
| walk_body (convert_nonlocal_reference_stmt, |
| convert_nonlocal_reference_op, info, |
| gimple_omp_body_ptr (stmt)); |
| break; |
| } |
| save_suppress = info->suppress_expansion; |
| if (convert_nonlocal_omp_clauses (gimple_omp_target_clauses_ptr (stmt), |
| wi)) |
| { |
| tree c, decl; |
| decl = get_chain_decl (info); |
| c = build_omp_clause (gimple_location (stmt), OMP_CLAUSE_MAP); |
| OMP_CLAUSE_DECL (c) = decl; |
| OMP_CLAUSE_SET_MAP_KIND (c, GOMP_MAP_TO); |
| OMP_CLAUSE_SIZE (c) = DECL_SIZE_UNIT (decl); |
| OMP_CLAUSE_CHAIN (c) = gimple_omp_target_clauses (stmt); |
| gimple_omp_target_set_clauses (as_a <gomp_target *> (stmt), c); |
| } |
| |
| save_local_var_chain = info->new_local_var_chain; |
| info->new_local_var_chain = NULL; |
| |
| walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| |
| if (info->new_local_var_chain) |
| declare_vars (info->new_local_var_chain, |
| gimple_seq_first_stmt (gimple_omp_body (stmt)), |
| false); |
| info->new_local_var_chain = save_local_var_chain; |
| info->suppress_expansion = save_suppress; |
| break; |
| |
| case GIMPLE_OMP_TEAMS: |
| save_suppress = info->suppress_expansion; |
| convert_nonlocal_omp_clauses (gimple_omp_teams_clauses_ptr (stmt), wi); |
| walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| info->suppress_expansion = save_suppress; |
| break; |
| |
| case GIMPLE_OMP_SECTION: |
| case GIMPLE_OMP_MASTER: |
| case GIMPLE_OMP_TASKGROUP: |
| case GIMPLE_OMP_ORDERED: |
| walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| break; |
| |
| case GIMPLE_BIND: |
| { |
| gbind *bind_stmt = as_a <gbind *> (stmt); |
| if (!optimize && gimple_bind_block (bind_stmt)) |
| note_nonlocal_block_vlas (info, gimple_bind_block (bind_stmt)); |
| |
| for (tree var = gimple_bind_vars (bind_stmt); var; var = DECL_CHAIN (var)) |
| if (TREE_CODE (var) == NAMELIST_DECL) |
| { |
| /* Adjust decls mentioned in NAMELIST_DECL. */ |
| tree decls = NAMELIST_DECL_ASSOCIATED_DECL (var); |
| tree decl; |
| unsigned int i; |
| |
| FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (decls), i, decl) |
| { |
| if (VAR_P (decl) |
| && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) |
| continue; |
| if (decl_function_context (decl) != info->context) |
| CONSTRUCTOR_ELT (decls, i)->value |
| = get_nonlocal_debug_decl (info, decl); |
| } |
| } |
| |
| *handled_ops_p = false; |
| return NULL_TREE; |
| } |
| case GIMPLE_COND: |
| wi->val_only = true; |
| wi->is_lhs = false; |
| *handled_ops_p = false; |
| return NULL_TREE; |
| |
| default: |
| /* For every other statement that we are not interested in |
| handling here, let the walker traverse the operands. */ |
| *handled_ops_p = false; |
| return NULL_TREE; |
| } |
| |
| /* We have handled all of STMT operands, no need to traverse the operands. */ |
| *handled_ops_p = true; |
| return NULL_TREE; |
| } |
| |
| |
| /* A subroutine of convert_local_reference. Create a local variable |
| in the parent function with DECL_VALUE_EXPR set to reference the |
| field in FRAME. This is used both for debug info and in OMP |
| lowering. */ |
| |
| static tree |
| get_local_debug_decl (struct nesting_info *info, tree decl, tree field) |
| { |
| tree x, new_decl; |
| |
| tree *slot = &info->var_map->get_or_insert (decl); |
| if (*slot) |
| return *slot; |
| |
| /* Make sure frame_decl gets created. */ |
| (void) get_frame_type (info); |
| x = info->frame_decl; |
| x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); |
| |
| new_decl = build_decl (DECL_SOURCE_LOCATION (decl), |
| VAR_DECL, DECL_NAME (decl), TREE_TYPE (decl)); |
| DECL_CONTEXT (new_decl) = info->context; |
| DECL_ARTIFICIAL (new_decl) = DECL_ARTIFICIAL (decl); |
| DECL_IGNORED_P (new_decl) = DECL_IGNORED_P (decl); |
| TREE_THIS_VOLATILE (new_decl) = TREE_THIS_VOLATILE (decl); |
| TREE_SIDE_EFFECTS (new_decl) = TREE_SIDE_EFFECTS (decl); |
| TREE_READONLY (new_decl) = TREE_READONLY (decl); |
| TREE_ADDRESSABLE (new_decl) = TREE_ADDRESSABLE (decl); |
| DECL_SEEN_IN_BIND_EXPR_P (new_decl) = 1; |
| if ((TREE_CODE (decl) == PARM_DECL |
| || TREE_CODE (decl) == RESULT_DECL |
| || VAR_P (decl)) |
| && DECL_BY_REFERENCE (decl)) |
| DECL_BY_REFERENCE (new_decl) = 1; |
| |
| SET_DECL_VALUE_EXPR (new_decl, x); |
| DECL_HAS_VALUE_EXPR_P (new_decl) = 1; |
| *slot = new_decl; |
| |
| DECL_CHAIN (new_decl) = info->debug_var_chain; |
| info->debug_var_chain = new_decl; |
| |
| /* Do not emit debug info twice. */ |
| DECL_IGNORED_P (decl) = 1; |
| |
| return new_decl; |
| } |
| |
| |
| /* Called via walk_function+walk_gimple_stmt, rewrite all references to VAR |
| and PARM_DECLs that were referenced by inner nested functions. |
| The rewrite will be a structure reference to the local frame variable. */ |
| |
| static bool convert_local_omp_clauses (tree *, struct walk_stmt_info *); |
| |
| static tree |
| convert_local_reference_op (tree *tp, int *walk_subtrees, void *data) |
| { |
| struct walk_stmt_info *wi = (struct walk_stmt_info *) data; |
| struct nesting_info *const info = (struct nesting_info *) wi->info; |
| tree t = *tp, field, x; |
| bool save_val_only; |
| |
| *walk_subtrees = 0; |
| switch (TREE_CODE (t)) |
| { |
| case VAR_DECL: |
| /* Non-automatic variables are never processed. */ |
| if (TREE_STATIC (t) || DECL_EXTERNAL (t)) |
| break; |
| /* FALLTHRU */ |
| |
| case PARM_DECL: |
| if (decl_function_context (t) == info->context) |
| { |
| /* If we copied a pointer to the frame, then the original decl |
| is used unchanged in the parent function. */ |
| if (use_pointer_in_frame (t)) |
| break; |
| |
| /* No need to transform anything if no child references the |
| variable. */ |
| field = lookup_field_for_decl (info, t, NO_INSERT); |
| if (!field) |
| break; |
| wi->changed = true; |
| |
| x = get_local_debug_decl (info, t, field); |
| if (!bitmap_bit_p (info->suppress_expansion, DECL_UID (t))) |
| x = get_frame_field (info, info->context, field, &wi->gsi); |
| |
| if (wi->val_only) |
| { |
| if (wi->is_lhs) |
| x = save_tmp_var (info, x, &wi->gsi); |
| else |
| x = init_tmp_var (info, x, &wi->gsi); |
| } |
| |
| *tp = x; |
| } |
| break; |
| |
| case ADDR_EXPR: |
| save_val_only = wi->val_only; |
| wi->val_only = false; |
| wi->is_lhs = false; |
| wi->changed = false; |
| walk_tree (&TREE_OPERAND (t, 0), convert_local_reference_op, wi, NULL); |
| wi->val_only = save_val_only; |
| |
| /* If we converted anything ... */ |
| if (wi->changed) |
| { |
| tree save_context; |
| |
| /* Then the frame decl is now addressable. */ |
| TREE_ADDRESSABLE (info->frame_decl) = 1; |
| |
| save_context = current_function_decl; |
| current_function_decl = info->context; |
| recompute_tree_invariant_for_addr_expr (t); |
| current_function_decl = save_context; |
| |
| /* If we are in a context where we only accept values, then |
| compute the address into a temporary. */ |
| if (save_val_only) |
| *tp = gsi_gimplify_val ((struct nesting_info *) wi->info, |
| t, &wi->gsi); |
| } |
| break; |
| |
| case REALPART_EXPR: |
| case IMAGPART_EXPR: |
| case COMPONENT_REF: |
| case ARRAY_REF: |
| case ARRAY_RANGE_REF: |
| case BIT_FIELD_REF: |
| /* Go down this entire nest and just look at the final prefix and |
| anything that describes the references. Otherwise, we lose track |
| of whether a NOP_EXPR or VIEW_CONVERT_EXPR needs a simple value. */ |
| save_val_only = wi->val_only; |
| wi->val_only = true; |
| wi->is_lhs = false; |
| for (; handled_component_p (t); tp = &TREE_OPERAND (t, 0), t = *tp) |
| { |
| if (TREE_CODE (t) == COMPONENT_REF) |
| walk_tree (&TREE_OPERAND (t, 2), convert_local_reference_op, wi, |
| NULL); |
| else if (TREE_CODE (t) == ARRAY_REF |
| || TREE_CODE (t) == ARRAY_RANGE_REF) |
| { |
| walk_tree (&TREE_OPERAND (t, 1), convert_local_reference_op, wi, |
| NULL); |
| walk_tree (&TREE_OPERAND (t, 2), convert_local_reference_op, wi, |
| NULL); |
| walk_tree (&TREE_OPERAND (t, 3), convert_local_reference_op, wi, |
| NULL); |
| } |
| } |
| wi->val_only = false; |
| walk_tree (tp, convert_local_reference_op, wi, NULL); |
| wi->val_only = save_val_only; |
| break; |
| |
| case MEM_REF: |
| save_val_only = wi->val_only; |
| wi->val_only = true; |
| wi->is_lhs = false; |
| walk_tree (&TREE_OPERAND (t, 0), convert_local_reference_op, |
| wi, NULL); |
| /* We need to re-fold the MEM_REF as component references as |
| part of a ADDR_EXPR address are not allowed. But we cannot |
| fold here, as the chain record type is not yet finalized. */ |
| if (TREE_CODE (TREE_OPERAND (t, 0)) == ADDR_EXPR |
| && !DECL_P (TREE_OPERAND (TREE_OPERAND (t, 0), 0))) |
| info->mem_refs->add (tp); |
| wi->val_only = save_val_only; |
| break; |
| |
| case VIEW_CONVERT_EXPR: |
| /* Just request to look at the subtrees, leaving val_only and lhs |
| untouched. This might actually be for !val_only + lhs, in which |
| case we don't want to force a replacement by a temporary. */ |
| *walk_subtrees = 1; |
| break; |
| |
| default: |
| if (!IS_TYPE_OR_DECL_P (t)) |
| { |
| *walk_subtrees = 1; |
| wi->val_only = true; |
| wi->is_lhs = false; |
| } |
| break; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| static tree convert_local_reference_stmt (gimple_stmt_iterator *, bool *, |
| struct walk_stmt_info *); |
| |
| /* Helper for convert_local_reference. Convert all the references in |
| the chain of clauses at *PCLAUSES. WI is as in convert_local_reference. */ |
| |
| static bool |
| convert_local_omp_clauses (tree *pclauses, struct walk_stmt_info *wi) |
| { |
| struct nesting_info *const info = (struct nesting_info *) wi->info; |
| bool need_frame = false, need_stmts = false; |
| tree clause, decl; |
| int dummy; |
| bitmap new_suppress; |
| |
| new_suppress = BITMAP_GGC_ALLOC (); |
| bitmap_copy (new_suppress, info->suppress_expansion); |
| |
| for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause)) |
| { |
| switch (OMP_CLAUSE_CODE (clause)) |
| { |
| case OMP_CLAUSE_REDUCTION: |
| if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) |
| need_stmts = true; |
| goto do_decl_clause; |
| |
| case OMP_CLAUSE_LASTPRIVATE: |
| if (OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause)) |
| need_stmts = true; |
| goto do_decl_clause; |
| |
| case OMP_CLAUSE_LINEAR: |
| if (OMP_CLAUSE_LINEAR_GIMPLE_SEQ (clause)) |
| need_stmts = true; |
| wi->val_only = true; |
| wi->is_lhs = false; |
| convert_local_reference_op (&OMP_CLAUSE_LINEAR_STEP (clause), &dummy, |
| wi); |
| goto do_decl_clause; |
| |
| case OMP_CLAUSE_PRIVATE: |
| case OMP_CLAUSE_FIRSTPRIVATE: |
| case OMP_CLAUSE_COPYPRIVATE: |
| case OMP_CLAUSE_SHARED: |
| case OMP_CLAUSE_TO_DECLARE: |
| case OMP_CLAUSE_LINK: |
| case OMP_CLAUSE_USE_DEVICE_PTR: |
| case OMP_CLAUSE_IS_DEVICE_PTR: |
| do_decl_clause: |
| decl = OMP_CLAUSE_DECL (clause); |
| if (VAR_P (decl) |
| && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) |
| break; |
| if (decl_function_context (decl) == info->context |
| && !use_pointer_in_frame (decl)) |
| { |
| tree field = lookup_field_for_decl (info, decl, NO_INSERT); |
| if (field) |
| { |
| if (OMP_CLAUSE_CODE (clause) == OMP_CLAUSE_SHARED) |
| OMP_CLAUSE_SHARED_READONLY (clause) = 0; |
| bitmap_set_bit (new_suppress, DECL_UID (decl)); |
| OMP_CLAUSE_DECL (clause) |
| = get_local_debug_decl (info, decl, field); |
| need_frame = true; |
| } |
| } |
| break; |
| |
| case OMP_CLAUSE_SCHEDULE: |
| if (OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (clause) == NULL) |
| break; |
| /* FALLTHRU */ |
| case OMP_CLAUSE_FINAL: |
| case OMP_CLAUSE_IF: |
| case OMP_CLAUSE_NUM_THREADS: |
| case OMP_CLAUSE_DEPEND: |
| case OMP_CLAUSE_DEVICE: |
| case OMP_CLAUSE_NUM_TEAMS: |
| case OMP_CLAUSE_THREAD_LIMIT: |
| case OMP_CLAUSE_SAFELEN: |
| case OMP_CLAUSE_SIMDLEN: |
| case OMP_CLAUSE_PRIORITY: |
| case OMP_CLAUSE_GRAINSIZE: |
| case OMP_CLAUSE_NUM_TASKS: |
| case OMP_CLAUSE_HINT: |
| case OMP_CLAUSE__CILK_FOR_COUNT_: |
| case OMP_CLAUSE_NUM_GANGS: |
| case OMP_CLAUSE_NUM_WORKERS: |
| case OMP_CLAUSE_VECTOR_LENGTH: |
| case OMP_CLAUSE_GANG: |
| case OMP_CLAUSE_WORKER: |
| case OMP_CLAUSE_VECTOR: |
| case OMP_CLAUSE_ASYNC: |
| case OMP_CLAUSE_WAIT: |
| /* Several OpenACC clauses have optional arguments. Check if they |
| are present. */ |
| if (OMP_CLAUSE_OPERAND (clause, 0)) |
| { |
| wi->val_only = true; |
| wi->is_lhs = false; |
| convert_local_reference_op (&OMP_CLAUSE_OPERAND (clause, 0), |
| &dummy, wi); |
| } |
| |
| /* The gang clause accepts two arguments. */ |
| if (OMP_CLAUSE_CODE (clause) == OMP_CLAUSE_GANG |
| && OMP_CLAUSE_GANG_STATIC_EXPR (clause)) |
| { |
| wi->val_only = true; |
| wi->is_lhs = false; |
| convert_nonlocal_reference_op |
| (&OMP_CLAUSE_GANG_STATIC_EXPR (clause), &dummy, wi); |
| } |
| break; |
| |
| case OMP_CLAUSE_DIST_SCHEDULE: |
| if (OMP_CLAUSE_DIST_SCHEDULE_CHUNK_EXPR (clause) != NULL) |
| { |
| wi->val_only = true; |
| wi->is_lhs = false; |
| convert_local_reference_op (&OMP_CLAUSE_OPERAND (clause, 0), |
| &dummy, wi); |
| } |
| break; |
| |
| case OMP_CLAUSE_MAP: |
| case OMP_CLAUSE_TO: |
| case OMP_CLAUSE_FROM: |
| if (OMP_CLAUSE_SIZE (clause)) |
| { |
| wi->val_only = true; |
| wi->is_lhs = false; |
| convert_local_reference_op (&OMP_CLAUSE_SIZE (clause), |
| &dummy, wi); |
| } |
| if (DECL_P (OMP_CLAUSE_DECL (clause))) |
| goto do_decl_clause; |
| wi->val_only = true; |
| wi->is_lhs = false; |
| walk_tree (&OMP_CLAUSE_DECL (clause), convert_local_reference_op, |
| wi, NULL); |
| break; |
| |
| case OMP_CLAUSE_ALIGNED: |
| if (OMP_CLAUSE_ALIGNED_ALIGNMENT (clause)) |
| { |
| wi->val_only = true; |
| wi->is_lhs = false; |
| convert_local_reference_op |
| (&OMP_CLAUSE_ALIGNED_ALIGNMENT (clause), &dummy, wi); |
| } |
| /* Like do_decl_clause, but don't add any suppression. */ |
| decl = OMP_CLAUSE_DECL (clause); |
| if (VAR_P (decl) |
| && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) |
| break; |
| if (decl_function_context (decl) == info->context |
| && !use_pointer_in_frame (decl)) |
| { |
| tree field = lookup_field_for_decl (info, decl, NO_INSERT); |
| if (field) |
| { |
| OMP_CLAUSE_DECL (clause) |
| = get_local_debug_decl (info, decl, field); |
| need_frame = true; |
| } |
| } |
| break; |
| |
| case OMP_CLAUSE_NOWAIT: |
| case OMP_CLAUSE_ORDERED: |
| case OMP_CLAUSE_DEFAULT: |
| case OMP_CLAUSE_COPYIN: |
| case OMP_CLAUSE_COLLAPSE: |
| case OMP_CLAUSE_TILE: |
| case OMP_CLAUSE_UNTIED: |
| case OMP_CLAUSE_MERGEABLE: |
| case OMP_CLAUSE_PROC_BIND: |
| case OMP_CLAUSE_NOGROUP: |
| case OMP_CLAUSE_THREADS: |
| case OMP_CLAUSE_SIMD: |
| case OMP_CLAUSE_DEFAULTMAP: |
| case OMP_CLAUSE_SEQ: |
| case OMP_CLAUSE_INDEPENDENT: |
| case OMP_CLAUSE_AUTO: |
| break; |
| |
| /* The following clause belongs to the OpenACC cache directive, which |
| is discarded during gimplification. */ |
| case OMP_CLAUSE__CACHE_: |
| /* The following clauses are only allowed in the OpenMP declare simd |
| directive, so not seen here. */ |
| case OMP_CLAUSE_UNIFORM: |
| case OMP_CLAUSE_INBRANCH: |
| case OMP_CLAUSE_NOTINBRANCH: |
| /* The following clauses are only allowed on OpenMP cancel and |
| cancellation point directives, which at this point have already |
| been lowered into a function call. */ |
| case OMP_CLAUSE_FOR: |
| case OMP_CLAUSE_PARALLEL: |
| case OMP_CLAUSE_SECTIONS: |
| case OMP_CLAUSE_TASKGROUP: |
| /* The following clauses are only added during OMP lowering; nested |
| function decomposition happens before that. */ |
| case OMP_CLAUSE__LOOPTEMP_: |
| case OMP_CLAUSE__SIMDUID_: |
| case OMP_CLAUSE__GRIDDIM_: |
| /* Anything else. */ |
| default: |
| gcc_unreachable (); |
| } |
| } |
| |
| info->suppress_expansion = new_suppress; |
| |
| if (need_stmts) |
| for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause)) |
| switch (OMP_CLAUSE_CODE (clause)) |
| { |
| case OMP_CLAUSE_REDUCTION: |
| if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) |
| { |
| tree old_context |
| = DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)); |
| DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) |
| = info->context; |
| if (OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (clause)) |
| DECL_CONTEXT (OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (clause)) |
| = info->context; |
| walk_body (convert_local_reference_stmt, |
| convert_local_reference_op, info, |
| &OMP_CLAUSE_REDUCTION_GIMPLE_INIT (clause)); |
| walk_body (convert_local_reference_stmt, |
| convert_local_reference_op, info, |
| &OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (clause)); |
| DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) |
| = old_context; |
| if (OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (clause)) |
| DECL_CONTEXT (OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (clause)) |
| = old_context; |
| } |
| break; |
| |
| case OMP_CLAUSE_LASTPRIVATE: |
| walk_body (convert_local_reference_stmt, |
| convert_local_reference_op, info, |
| &OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause)); |
| break; |
| |
| case OMP_CLAUSE_LINEAR: |
| walk_body (convert_local_reference_stmt, |
| convert_local_reference_op, info, |
| &OMP_CLAUSE_LINEAR_GIMPLE_SEQ (clause)); |
| break; |
| |
| default: |
| break; |
| } |
| |
| return need_frame; |
| } |
| |
| |
| /* Called via walk_function+walk_gimple_stmt, rewrite all references to VAR |
| and PARM_DECLs that were referenced by inner nested functions. |
| The rewrite will be a structure reference to the local frame variable. */ |
| |
| static tree |
| convert_local_reference_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p, |
| struct walk_stmt_info *wi) |
| { |
| struct nesting_info *info = (struct nesting_info *) wi->info; |
| tree save_local_var_chain; |
| bitmap save_suppress; |
| char save_static_chain_added; |
| bool frame_decl_added; |
| gimple *stmt = gsi_stmt (*gsi); |
| |
| switch (gimple_code (stmt)) |
| { |
| case GIMPLE_OMP_PARALLEL: |
| case GIMPLE_OMP_TASK: |
| save_suppress = info->suppress_expansion; |
| frame_decl_added = false; |
| if (convert_local_omp_clauses (gimple_omp_taskreg_clauses_ptr (stmt), |
| wi)) |
| { |
| tree c = build_omp_clause (gimple_location (stmt), |
| OMP_CLAUSE_SHARED); |
| (void) get_frame_type (info); |
| OMP_CLAUSE_DECL (c) = info->frame_decl; |
| OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt); |
| gimple_omp_taskreg_set_clauses (stmt, c); |
| info->static_chain_added |= 4; |
| frame_decl_added = true; |
| } |
| |
| save_local_var_chain = info->new_local_var_chain; |
| save_static_chain_added = info->static_chain_added; |
| info->new_local_var_chain = NULL; |
| info->static_chain_added = 0; |
| |
| walk_body (convert_local_reference_stmt, convert_local_reference_op, info, |
| gimple_omp_body_ptr (stmt)); |
| |
| if ((info->static_chain_added & 4) != 0 && !frame_decl_added) |
| { |
| tree c = build_omp_clause (gimple_location (stmt), |
| OMP_CLAUSE_SHARED); |
| (void) get_frame_type (info); |
| OMP_CLAUSE_DECL (c) = info->frame_decl; |
| OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt); |
| info->static_chain_added |= 4; |
| gimple_omp_taskreg_set_clauses (stmt, c); |
| } |
| if (info->new_local_var_chain) |
| declare_vars (info->new_local_var_chain, |
| gimple_seq_first_stmt (gimple_omp_body (stmt)), false); |
| info->new_local_var_chain = save_local_var_chain; |
| info->suppress_expansion = save_suppress; |
| info->static_chain_added |= save_static_chain_added; |
| break; |
| |
| case GIMPLE_OMP_FOR: |
| save_suppress = info->suppress_expansion; |
| convert_local_omp_clauses (gimple_omp_for_clauses_ptr (stmt), wi); |
| walk_gimple_omp_for (as_a <gomp_for *> (stmt), |
| convert_local_reference_stmt, |
| convert_local_reference_op, info); |
| walk_body (convert_local_reference_stmt, convert_local_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| info->suppress_expansion = save_suppress; |
| break; |
| |
| case GIMPLE_OMP_SECTIONS: |
| save_suppress = info->suppress_expansion; |
| convert_local_omp_clauses (gimple_omp_sections_clauses_ptr (stmt), wi); |
| walk_body (convert_local_reference_stmt, convert_local_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| info->suppress_expansion = save_suppress; |
| break; |
| |
| case GIMPLE_OMP_SINGLE: |
| save_suppress = info->suppress_expansion; |
| convert_local_omp_clauses (gimple_omp_single_clauses_ptr (stmt), wi); |
| walk_body (convert_local_reference_stmt, convert_local_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| info->suppress_expansion = save_suppress; |
| break; |
| |
| case GIMPLE_OMP_TARGET: |
| if (!is_gimple_omp_offloaded (stmt)) |
| { |
| save_suppress = info->suppress_expansion; |
| convert_local_omp_clauses (gimple_omp_target_clauses_ptr (stmt), wi); |
| info->suppress_expansion = save_suppress; |
| walk_body (convert_local_reference_stmt, convert_local_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| break; |
| } |
| save_suppress = info->suppress_expansion; |
| frame_decl_added = false; |
| if (convert_local_omp_clauses (gimple_omp_target_clauses_ptr (stmt), wi)) |
| { |
| tree c = build_omp_clause (gimple_location (stmt), OMP_CLAUSE_MAP); |
| (void) get_frame_type (info); |
| OMP_CLAUSE_DECL (c) = info->frame_decl; |
| OMP_CLAUSE_SET_MAP_KIND (c, GOMP_MAP_TOFROM); |
| OMP_CLAUSE_SIZE (c) = DECL_SIZE_UNIT (info->frame_decl); |
| OMP_CLAUSE_CHAIN (c) = gimple_omp_target_clauses (stmt); |
| gimple_omp_target_set_clauses (as_a <gomp_target *> (stmt), c); |
| info->static_chain_added |= 4; |
| frame_decl_added = true; |
| } |
| |
| save_local_var_chain = info->new_local_var_chain; |
| save_static_chain_added = info->static_chain_added; |
| info->new_local_var_chain = NULL; |
| info->static_chain_added = 0; |
| |
| walk_body (convert_local_reference_stmt, convert_local_reference_op, info, |
| gimple_omp_body_ptr (stmt)); |
| |
| if ((info->static_chain_added & 4) != 0 && !frame_decl_added) |
| { |
| tree c = build_omp_clause (gimple_location (stmt), OMP_CLAUSE_MAP); |
| (void) get_frame_type (info); |
| OMP_CLAUSE_DECL (c) = info->frame_decl; |
| OMP_CLAUSE_SET_MAP_KIND (c, GOMP_MAP_TOFROM); |
| OMP_CLAUSE_SIZE (c) = DECL_SIZE_UNIT (info->frame_decl); |
| OMP_CLAUSE_CHAIN (c) = gimple_omp_target_clauses (stmt); |
| gimple_omp_target_set_clauses (as_a <gomp_target *> (stmt), c); |
| info->static_chain_added |= 4; |
| } |
| |
| if (info->new_local_var_chain) |
| declare_vars (info->new_local_var_chain, |
| gimple_seq_first_stmt (gimple_omp_body (stmt)), false); |
| info->new_local_var_chain = save_local_var_chain; |
| info->suppress_expansion = save_suppress; |
| info->static_chain_added |= save_static_chain_added; |
| break; |
| |
| case GIMPLE_OMP_TEAMS: |
| save_suppress = info->suppress_expansion; |
| convert_local_omp_clauses (gimple_omp_teams_clauses_ptr (stmt), wi); |
| walk_body (convert_local_reference_stmt, convert_local_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| info->suppress_expansion = save_suppress; |
| break; |
| |
| case GIMPLE_OMP_SECTION: |
| case GIMPLE_OMP_MASTER: |
| case GIMPLE_OMP_TASKGROUP: |
| case GIMPLE_OMP_ORDERED: |
| walk_body (convert_local_reference_stmt, convert_local_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| break; |
| |
| case GIMPLE_COND: |
| wi->val_only = true; |
| wi->is_lhs = false; |
| *handled_ops_p = false; |
| return NULL_TREE; |
| |
| case GIMPLE_ASSIGN: |
| if (gimple_clobber_p (stmt)) |
| { |
| tree lhs = gimple_assign_lhs (stmt); |
| if (!use_pointer_in_frame (lhs) |
| && lookup_field_for_decl (info, lhs, NO_INSERT)) |
| { |
| gsi_replace (gsi, gimple_build_nop (), true); |
| break; |
| } |
| } |
| *handled_ops_p = false; |
| return NULL_TREE; |
| |
| case GIMPLE_BIND: |
| for (tree var = gimple_bind_vars (as_a <gbind *> (stmt)); |
| var; |
| var = DECL_CHAIN (var)) |
| if (TREE_CODE (var) == NAMELIST_DECL) |
| { |
| /* Adjust decls mentioned in NAMELIST_DECL. */ |
| tree decls = NAMELIST_DECL_ASSOCIATED_DECL (var); |
| tree decl; |
| unsigned int i; |
| |
| FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (decls), i, decl) |
| { |
| if (VAR_P (decl) |
| && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) |
| continue; |
| if (decl_function_context (decl) == info->context |
| && !use_pointer_in_frame (decl)) |
| { |
| tree field = lookup_field_for_decl (info, decl, NO_INSERT); |
| if (field) |
| { |
| CONSTRUCTOR_ELT (decls, i)->value |
| = get_local_debug_decl (info, decl, field); |
| } |
| } |
| } |
| } |
| |
| *handled_ops_p = false; |
| return NULL_TREE; |
| |
| default: |
| /* For every other statement that we are not interested in |
| handling here, let the walker traverse the operands. */ |
| *handled_ops_p = false; |
| return NULL_TREE; |
| } |
| |
| /* Indicate that we have handled all the operands ourselves. */ |
| *handled_ops_p = true; |
| return NULL_TREE; |
| } |
| |
| |
| /* Called via walk_function+walk_gimple_stmt, rewrite all GIMPLE_GOTOs |
| that reference labels from outer functions. The rewrite will be a |
| call to __builtin_nonlocal_goto. */ |
| |
| static tree |
| convert_nl_goto_reference (gimple_stmt_iterator *gsi, bool *handled_ops_p, |
| struct walk_stmt_info *wi) |
| { |
| struct nesting_info *const info = (struct nesting_info *) wi->info, *i; |
| tree label, new_label, target_context, x, field; |
| gcall *call; |
| gimple *stmt = gsi_stmt (*gsi); |
| |
| if (gimple_code (stmt) != GIMPLE_GOTO) |
| { |
| *handled_ops_p = false; |
| return NULL_TREE; |
| } |
| |
| label = gimple_goto_dest (stmt); |
| if (TREE_CODE (label) != LABEL_DECL) |
| { |
| *handled_ops_p = false; |
| return NULL_TREE; |
| } |
| |
| target_context = decl_function_context (label); |
| if (target_context == info->context) |
| { |
| *handled_ops_p = false; |
| return NULL_TREE; |
| } |
| |
| for (i = info->outer; target_context != i->context; i = i->outer) |
| continue; |
| |
| /* The original user label may also be use for a normal goto, therefore |
| we must create a new label that will actually receive the abnormal |
| control transfer. This new label will be marked LABEL_NONLOCAL; this |
| mark will trigger proper behavior in the cfg, as well as cause the |
| (hairy target-specific) non-local goto receiver code to be generated |
| when we expand rtl. Enter this association into var_map so that we |
| can insert the new label into the IL during a second pass. */ |
| tree *slot = &i->var_map->get_or_insert (label); |
| if (*slot == NULL) |
| { |
| new_label = create_artificial_label (UNKNOWN_LOCATION); |
| DECL_NONLOCAL (new_label) = 1; |
| *slot = new_label; |
| } |
| else |
| new_label = *slot; |
| |
| /* Build: __builtin_nl_goto(new_label, &chain->nl_goto_field). */ |
| field = get_nl_goto_field (i); |
| x = get_frame_field (info, target_context, field, gsi); |
| x = build_addr (x); |
| x = gsi_gimplify_val (info, x, gsi); |
| call = gimple_build_call (builtin_decl_implicit (BUILT_IN_NONLOCAL_GOTO), |
| 2, build_addr (new_label), x); |
| gsi_replace (gsi, call, false); |
| |
| /* We have handled all of STMT's operands, no need to keep going. */ |
| *handled_ops_p = true; |
| return NULL_TREE; |
| } |
| |
| |
| /* Called via walk_function+walk_tree, rewrite all GIMPLE_LABELs whose labels |
| are referenced via nonlocal goto from a nested function. The rewrite |
| will involve installing a newly generated DECL_NONLOCAL label, and |
| (potentially) a branch around the rtl gunk that is assumed to be |
| attached to such a label. */ |
| |
| static tree |
| convert_nl_goto_receiver (gimple_stmt_iterator *gsi, bool *handled_ops_p, |
| struct walk_stmt_info *wi) |
| { |
| struct nesting_info *const info = (struct nesting_info *) wi->info; |
| tree label, new_label; |
| gimple_stmt_iterator tmp_gsi; |
| glabel *stmt = dyn_cast <glabel *> (gsi_stmt (*gsi)); |
| |
| if (!stmt) |
| { |
| *handled_ops_p = false; |
| return NULL_TREE; |
| } |
| |
| label = gimple_label_label (stmt); |
| |
| tree *slot = info->var_map->get (label); |
| if (!slot) |
| { |
| *handled_ops_p = false; |
| return NULL_TREE; |
| } |
| |
| /* If there's any possibility that the previous statement falls through, |
| then we must branch around the new non-local label. */ |
| tmp_gsi = wi->gsi; |
| gsi_prev (&tmp_gsi); |
| if (gsi_end_p (tmp_gsi) || gimple_stmt_may_fallthru (gsi_stmt (tmp_gsi))) |
| { |
| gimple *stmt = gimple_build_goto (label); |
| gsi_insert_before (gsi, stmt, GSI_SAME_STMT); |
| } |
| |
| new_label = (tree) *slot; |
| stmt = gimple_build_label (new_label); |
| gsi_insert_before (gsi, stmt, GSI_SAME_STMT); |
| |
| *handled_ops_p = true; |
| return NULL_TREE; |
| } |
| |
| |
| /* Called via walk_function+walk_stmt, rewrite all references to addresses |
| of nested functions that require the use of trampolines. The rewrite |
| will involve a reference a trampoline generated for the occasion. */ |
| |
| static tree |
| convert_tramp_reference_op (tree *tp, int *walk_subtrees, void *data) |
| { |
| struct walk_stmt_info *wi = (struct walk_stmt_info *) data; |
| struct nesting_info *const info = (struct nesting_info *) wi->info, *i; |
| tree t = *tp, decl, target_context, x, builtin; |
| bool descr; |
| gcall *call; |
| |
| *walk_subtrees = 0; |
| switch (TREE_CODE (t)) |
| { |
| case ADDR_EXPR: |
| /* Build |
| T.1 = &CHAIN->tramp; |
| T.2 = __builtin_adjust_trampoline (T.1); |
| T.3 = (func_type)T.2; |
| */ |
| |
| decl = TREE_OPERAND (t, 0); |
| if (TREE_CODE (decl) != FUNCTION_DECL) |
| break; |
| |
| /* Only need to process nested functions. */ |
| target_context = decl_function_context (decl); |
| if (!target_context) |
| break; |
| |
| /* If the nested function doesn't use a static chain, then |
| it doesn't need a trampoline. */ |
| if (!DECL_STATIC_CHAIN (decl)) |
| break; |
| |
| /* If we don't want a trampoline, then don't build one. */ |
| if (TREE_NO_TRAMPOLINE (t)) |
| break; |
| |
| /* Lookup the immediate parent of the callee, as that's where |
| we need to insert the trampoline. */ |
| for (i = info; i->context != target_context; i = i->outer) |
| continue; |
| |
| /* Decide whether to generate a descriptor or a trampoline. */ |
| descr = FUNC_ADDR_BY_DESCRIPTOR (t) && !flag_trampolines; |
| |
| if (descr) |
| x = lookup_descr_for_decl (i, decl, INSERT); |
| else |
| x = lookup_tramp_for_decl (i, decl, INSERT); |
| |
| /* Compute the address of the field holding the trampoline. */ |
| x = get_frame_field (info, target_context, x, &wi->gsi); |
| x = build_addr (x); |
| x = gsi_gimplify_val (info, x, &wi->gsi); |
| |
| /* Do machine-specific ugliness. Normally this will involve |
| computing extra alignment, but it can really be anything. */ |
| if (descr) |
| builtin = builtin_decl_implicit (BUILT_IN_ADJUST_DESCRIPTOR); |
| else |
| builtin = builtin_decl_implicit (BUILT_IN_ADJUST_TRAMPOLINE); |
| call = gimple_build_call (builtin, 1, x); |
| x = init_tmp_var_with_call (info, &wi->gsi, call); |
| |
| /* Cast back to the proper function type. */ |
| x = build1 (NOP_EXPR, TREE_TYPE (t), x); |
| x = init_tmp_var (info, x, &wi->gsi); |
| |
| *tp = x; |
| break; |
| |
| default: |
| if (!IS_TYPE_OR_DECL_P (t)) |
| *walk_subtrees = 1; |
| break; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| |
| /* Called via walk_function+walk_gimple_stmt, rewrite all references |
| to addresses of nested functions that require the use of |
| trampolines. The rewrite will involve a reference a trampoline |
| generated for the occasion. */ |
| |
| static tree |
| convert_tramp_reference_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p, |
| struct walk_stmt_info *wi) |
| { |
| struct nesting_info *info = (struct nesting_info *) wi->info; |
| gimple *stmt = gsi_stmt (*gsi); |
| |
| switch (gimple_code (stmt)) |
| { |
| case GIMPLE_CALL: |
| { |
| /* Only walk call arguments, lest we generate trampolines for |
| direct calls. */ |
| unsigned long i, nargs = gimple_call_num_args (stmt); |
| for (i = 0; i < nargs; i++) |
| walk_tree (gimple_call_arg_ptr (stmt, i), convert_tramp_reference_op, |
| wi, NULL); |
| break; |
| } |
| |
| case GIMPLE_OMP_TARGET: |
| if (!is_gimple_omp_offloaded (stmt)) |
| { |
| *handled_ops_p = false; |
| return NULL_TREE; |
| } |
| /* FALLTHRU */ |
| case GIMPLE_OMP_PARALLEL: |
| case GIMPLE_OMP_TASK: |
| { |
| tree save_local_var_chain = info->new_local_var_chain; |
| walk_gimple_op (stmt, convert_tramp_reference_op, wi); |
| info->new_local_var_chain = NULL; |
| char save_static_chain_added = info->static_chain_added; |
| info->static_chain_added = 0; |
| walk_body (convert_tramp_reference_stmt, convert_tramp_reference_op, |
| info, gimple_omp_body_ptr (stmt)); |
| if (info->new_local_var_chain) |
| declare_vars (info->new_local_var_chain, |
| gimple_seq_first_stmt (gimple_omp_body (stmt)), |
| false); |
| for (int i = 0; i < 2; i++) |
| { |
| tree c, decl; |
| if ((info->static_chain_added & (1 << i)) == 0) |
| continue; |
| decl = i ? get_chain_decl (info) : info->frame_decl; |
| /* Don't add CHAIN.* or FRAME.* twice. */ |
| for (c = gimple_omp_taskreg_clauses (stmt); |
| c; |
| c = OMP_CLAUSE_CHAIN (c)) |
| if ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE |
| || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED) |
| && OMP_CLAUSE_DECL (c) == decl) |
| break; |
| if (c == NULL && gimple_code (stmt) != GIMPLE_OMP_TARGET) |
| { |
| c = build_omp_clause (gimple_location (stmt), |
| i ? OMP_CLAUSE_FIRSTPRIVATE |
| : OMP_CLAUSE_SHARED); |
| OMP_CLAUSE_DECL (c) = decl; |
| OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt); |
| gimple_omp_taskreg_set_clauses (stmt, c); |
| } |
| else if (c == NULL) |
| { |
| c = build_omp_clause (gimple_location (stmt), |
| OMP_CLAUSE_MAP); |
| OMP_CLAUSE_DECL (c) = decl; |
| OMP_CLAUSE_SET_MAP_KIND (c, |
| i ? GOMP_MAP_TO : GOMP_MAP_TOFROM); |
| OMP_CLAUSE_SIZE (c) = DECL_SIZE_UNIT (decl); |
| OMP_CLAUSE_CHAIN (c) = gimple_omp_target_clauses (stmt); |
| gimple_omp_target_set_clauses (as_a <gomp_target *> (stmt), |
| c); |
| } |
| } |
| info->new_local_var_chain = save_local_var_chain; |
| info->static_chain_added |= save_static_chain_added; |
| } |
| break; |
| |
| default: |
| *handled_ops_p = false; |
| return NULL_TREE; |
| } |
| |
| *handled_ops_p = true; |
| return NULL_TREE; |
| } |
| |
| |
| |
| /* Called via walk_function+walk_gimple_stmt, rewrite all GIMPLE_CALLs |
| that reference nested functions to make sure that the static chain |
| is set up properly for the call. */ |
| |
| static tree |
| convert_gimple_call (gimple_stmt_iterator *gsi, bool *handled_ops_p, |
| struct walk_stmt_info *wi) |
| { |
| struct nesting_info *const info = (struct nesting_info *) wi->info; |
| tree decl, target_context; |
| char save_static_chain_added; |
| int i; |
| gimple *stmt = gsi_stmt (*gsi); |
| |
| switch (gimple_code (stmt)) |
| { |
| case GIMPLE_CALL: |
| if (gimple_call_chain (stmt)) |
| break; |
| decl = gimple_call_fndecl (stmt); |
| if (!decl) |
| break; |
| target_context = decl_function_context (decl); |
| if (target_context && DECL_STATIC_CHAIN (decl)) |
| { |
| gimple_call_set_chain (as_a <gcall *> (stmt), |
| get_static_chain (info, target_context, |
| &wi->gsi)); |
| info->static_chain_added |= (1 << (info->context != target_context)); |
| } |
| break; |
| |
| case GIMPLE_OMP_PARALLEL: |
| case GIMPLE_OMP_TASK: |
| save_static_chain_added = info->static_chain_added; |
| info->static_chain_added = 0; |
| walk_body (convert_gimple_call, NULL, info, gimple_omp_body_ptr (stmt)); |
| for (i = 0; i < 2; i++) |
| { |
| tree c, decl; |
| if ((info->static_chain_added & (1 << i)) == 0) |
| continue; |
| decl = i ? get_chain_decl (info) : info->frame_decl; |
| /* Don't add CHAIN.* or FRAME.* twice. */ |
| for (c = gimple_omp_taskreg_clauses (stmt); |
| c; |
| c = OMP_CLAUSE_CHAIN (c)) |
| if ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE |
| || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED) |
| && OMP_CLAUSE_DECL (c) == decl) |
| break; |
| if (c == NULL) |
| { |
| c = build_omp_clause (gimple_location (stmt), |
| i ? OMP_CLAUSE_FIRSTPRIVATE |
| : OMP_CLAUSE_SHARED); |
| OMP_CLAUSE_DECL (c) = decl; |
| OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt); |
| gimple_omp_taskreg_set_clauses (stmt, c); |
| } |
| } |
| info->static_chain_added |= save_static_chain_added; |
| break; |
| |
| case GIMPLE_OMP_TARGET: |
| if (!is_gimple_omp_offloaded (stmt)) |
| { |
| walk_body (convert_gimple_call, NULL, info, gimple_omp_body_ptr (stmt)); |
| break; |
| } |
| save_static_chain_added = info->static_chain_added; |
| info->static_chain_added = 0; |
| walk_body (convert_gimple_call, NULL, info, gimple_omp_body_ptr (stmt)); |
| for (i = 0; i < 2; i++) |
| { |
| tree c, decl; |
| if ((info->static_chain_added & (1 << i)) == 0) |
| continue; |
| decl = i ? get_chain_decl (info) : info->frame_decl; |
| /* Don't add CHAIN.* or FRAME.* twice. */ |
| for (c = gimple_omp_target_clauses (stmt); |
| c; |
| c = OMP_CLAUSE_CHAIN (c)) |
| if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP |
| && OMP_CLAUSE_DECL (c) == decl) |
| break; |
| if (c == NULL) |
| { |
| c = build_omp_clause (gimple_location (stmt), OMP_CLAUSE_MAP); |
| OMP_CLAUSE_DECL (c) = decl; |
| OMP_CLAUSE_SET_MAP_KIND (c, i ? GOMP_MAP_TO : GOMP_MAP_TOFROM); |
| OMP_CLAUSE_SIZE (c) = DECL_SIZE_UNIT (decl); |
| OMP_CLAUSE_CHAIN (c) = gimple_omp_target_clauses (stmt); |
| gimple_omp_target_set_clauses (as_a <gomp_target *> (stmt), |
| c); |
| } |
| } |
| info->static_chain_added |= save_static_chain_added; |
| break; |
| |
| case GIMPLE_OMP_FOR: |
| walk_body (convert_gimple_call, NULL, info, |
| gimple_omp_for_pre_body_ptr (stmt)); |
| /* FALLTHRU */ |
| case GIMPLE_OMP_SECTIONS: |
| case GIMPLE_OMP_SECTION: |
| case GIMPLE_OMP_SINGLE: |
| case GIMPLE_OMP_TEAMS: |
| case GIMPLE_OMP_MASTER: |
| case GIMPLE_OMP_TASKGROUP: |
| case GIMPLE_OMP_ORDERED: |
| case GIMPLE_OMP_CRITICAL: |
| walk_body (convert_gimple_call, NULL, info, gimple_omp_body_ptr (stmt)); |
| break; |
| |
| default: |
| /* Keep looking for other operands. */ |
| *handled_ops_p = false; |
| return NULL_TREE; |
| } |
| |
| *handled_ops_p = true; |
| return NULL_TREE; |
| } |
| |
| /* Walk the nesting tree starting with ROOT. Convert all trampolines and |
| call expressions. At the same time, determine if a nested function |
| actually uses its static chain; if not, remember that. */ |
| |
| static void |
| convert_all_function_calls (struct nesting_info *root) |
| { |
| unsigned int chain_count = 0, old_chain_count, iter_count; |
| struct nesting_info *n; |
| |
| /* First, optimistically clear static_chain for all decls that haven't |
| used the static chain already for variable access. But always create |
| it if not optimizing. This makes it possible to reconstruct the static |
| nesting tree at run time and thus to resolve up-level references from |
| within the debugger. */ |
| FOR_EACH_NEST_INFO (n, root) |
| { |
| tree decl = n->context; |
| if (!optimize) |
| { |
| if (n->inner) |
| (void) get_frame_type (n); |
| if (n->outer) |
| (void) get_chain_decl (n); |
| } |
| else if (!n->outer || (!n->chain_decl && !n->chain_field)) |
| { |
| DECL_STATIC_CHAIN (decl) = 0; |
| if (dump_file && (dump_flags & TDF_DETAILS)) |
| fprintf (dump_file, "Guessing no static-chain for %s\n", |
| lang_hooks.decl_printable_name (decl, 2)); |
| } |
| else |
| DECL_STATIC_CHAIN (decl) = 1; |
| chain_count += DECL_STATIC_CHAIN (decl); |
| } |
| |
| /* Walk the functions and perform transformations. Note that these |
| transformations can induce new uses of the static chain, which in turn |
| require re-examining all users of the decl. */ |
| /* ??? It would make sense to try to use the call graph to speed this up, |
| but the call graph hasn't really been built yet. Even if it did, we |
| would still need to iterate in this loop since address-of references |
| wouldn't show up in the callgraph anyway. */ |
| iter_count = 0; |
| do |
| { |
| old_chain_count = chain_count; |
| chain_count = 0; |
| iter_count++; |
| |
| if (dump_file && (dump_flags & TDF_DETAILS)) |
| fputc ('\n', dump_file); |
| |
| FOR_EACH_NEST_INFO (n, root) |
| { |
| tree decl = n->context; |
| walk_function (convert_tramp_reference_stmt, |
| convert_tramp_reference_op, n); |
| walk_function (convert_gimple_call, NULL, n); |
| chain_count += DECL_STATIC_CHAIN (decl); |
| } |
| } |
| while (chain_count != old_chain_count); |
| |
| if (dump_file && (dump_flags & TDF_DETAILS)) |
| fprintf (dump_file, "convert_all_function_calls iterations: %u\n\n", |
| iter_count); |
| } |
| |
| struct nesting_copy_body_data |
| { |
| copy_body_data cb; |
| struct nesting_info *root; |
| }; |
| |
| /* A helper subroutine for debug_var_chain type remapping. */ |
| |
| static tree |
| nesting_copy_decl (tree decl, copy_body_data *id) |
| { |
| struct nesting_copy_body_data *nid = (struct nesting_copy_body_data *) id; |
| tree *slot = nid->root->var_map->get (decl); |
| |
| if (slot) |
| return (tree) *slot; |
| |
| if (TREE_CODE (decl) == TYPE_DECL && DECL_ORIGINAL_TYPE (decl)) |
| { |
| tree new_decl = copy_decl_no_change (decl, id); |
| DECL_ORIGINAL_TYPE (new_decl) |
| = remap_type (DECL_ORIGINAL_TYPE (decl), id); |
| return new_decl; |
| } |
| |
| if (VAR_P (decl) |
| || TREE_CODE (decl) == PARM_DECL |
| || TREE_CODE (decl) == RESULT_DECL) |
| return decl; |
| |
| return copy_decl_no_change (decl, id); |
| } |
| |
| /* A helper function for remap_vla_decls. See if *TP contains |
| some remapped variables. */ |
| |
| static tree |
| contains_remapped_vars (tree *tp, int *walk_subtrees, void *data) |
| { |
| struct nesting_info *root = (struct nesting_info *) data; |
| tree t = *tp; |
| |
| if (DECL_P (t)) |
| { |
| *walk_subtrees = 0; |
| tree *slot = root->var_map->get (t); |
| |
| if (slot) |
| return *slot; |
| } |
| return NULL; |
| } |
| |
| /* Remap VLA decls in BLOCK and subblocks if remapped variables are |
| involved. */ |
| |
| static void |
| remap_vla_decls (tree block, struct nesting_info *root) |
| { |
| tree var, subblock, val, type; |
| struct nesting_copy_body_data id; |
| |
| for (subblock = BLOCK_SUBBLOCKS (block); |
| subblock; |
| subblock = BLOCK_CHAIN (subblock)) |
| remap_vla_decls (subblock, root); |
| |
| for (var = BLOCK_VARS (block); var; var = DECL_CHAIN (var)) |
| if (VAR_P (var) && DECL_HAS_VALUE_EXPR_P (var)) |
| { |
| val = DECL_VALUE_EXPR (var); |
| type = TREE_TYPE (var); |
| |
| if (!(TREE_CODE (val) == INDIRECT_REF |
| && TREE_CODE (TREE_OPERAND (val, 0)) == VAR_DECL |
| && variably_modified_type_p (type, NULL))) |
| continue; |
| |
| if (root->var_map->get (TREE_OPERAND (val, 0)) |
| || walk_tree (&type, contains_remapped_vars, root, NULL)) |
| break; |
| } |
| |
| if (var == NULL_TREE) |
| return; |
| |
| memset (&id, 0, sizeof (id)); |
| id.cb.copy_decl = nesting_copy_decl; |
| id.cb.decl_map = new hash_map<tree, tree>; |
| id.root = root; |
| |
| for (; var; var = DECL_CHAIN (var)) |
| if (VAR_P (var) && DECL_HAS_VALUE_EXPR_P (var)) |
| { |
| struct nesting_info *i; |
| tree newt, context; |
| |
| val = DECL_VALUE_EXPR (var); |
| type = TREE_TYPE (var); |
| |
| if (!(TREE_CODE (val) == INDIRECT_REF |
| && TREE_CODE (TREE_OPERAND (val, 0)) == VAR_DECL |
| && variably_modified_type_p (type, NULL))) |
| continue; |
| |
| tree *slot = root->var_map->get (TREE_OPERAND (val, 0)); |
| if (!slot && !walk_tree (&type, contains_remapped_vars, root, NULL)) |
| continue; |
| |
| context = decl_function_context (var); |
| for (i = root; i; i = i->outer) |
| if (i->context == context) |
| break; |
| |
| if (i == NULL) |
| continue; |
| |
| /* Fully expand value expressions. This avoids having debug variables |
| only referenced from them and that can be swept during GC. */ |
| if (slot) |
| { |
| tree t = (tree) *slot; |
| gcc_assert (DECL_P (t) && DECL_HAS_VALUE_EXPR_P (t)); |
| val = build1 (INDIRECT_REF, TREE_TYPE (val), DECL_VALUE_EXPR (t)); |
| } |
| |
| id.cb.src_fn = i->context; |
| id.cb.dst_fn = i->context; |
| id.cb.src_cfun = DECL_STRUCT_FUNCTION (root->context); |
| |
| TREE_TYPE (var) = newt = remap_type (type, &id.cb); |
| while (POINTER_TYPE_P (newt) && !TYPE_NAME (newt)) |
| { |
| newt = TREE_TYPE (newt); |
| type = TREE_TYPE (type); |
| } |
| if (TYPE_NAME (newt) |
| && TREE_CODE (TYPE_NAME (newt)) == TYPE_DECL |
| && DECL_ORIGINAL_TYPE (TYPE_NAME (newt)) |
| && newt != type |
| && TYPE_NAME (newt) == TYPE_NAME (type)) |
| TYPE_NAME (newt) = remap_decl (TYPE_NAME (newt), &id.cb); |
| |
| walk_tree (&val, copy_tree_body_r, &id.cb, NULL); |
| if (val != DECL_VALUE_EXPR (var)) |
| SET_DECL_VALUE_EXPR (var, val); |
| } |
| |
| delete id.cb.decl_map; |
| } |
| |
| /* Fold the MEM_REF *E. */ |
| bool |
| fold_mem_refs (tree *const &e, void *data ATTRIBUTE_UNUSED) |
| { |
| tree *ref_p = CONST_CAST2 (tree *, const tree *, (const tree *)e); |
| *ref_p = fold (*ref_p); |
| return true; |
| } |
| |
| /* Given DECL, a nested function, build an initialization call for FIELD, |
| the trampoline or descriptor for DECL, using FUNC as the function. */ |
| |
| static gcall * |
| build_init_call_stmt (struct nesting_info *info, tree decl, tree field, |
| tree func) |
| { |
| tree arg1, arg2, arg3, x; |
| |
| gcc_assert (DECL_STATIC_CHAIN (decl)); |
| arg3 = build_addr (info->frame_decl); |
| |
| arg2 = build_addr (decl); |
| |
| x = build3 (COMPONENT_REF, TREE_TYPE (field), |
| info->frame_decl, field, NULL_TREE); |
| arg1 = build_addr (x); |
| |
| return gimple_build_call (func, 3, arg1, arg2, arg3); |
| } |
| |
| /* Do "everything else" to clean up or complete state collected by the various |
| walking passes -- create a field to hold the frame base address, lay out the |
| types and decls, generate code to initialize the frame decl, store critical |
| expressions in the struct function for rtl to find. */ |
| |
| static void |
| finalize_nesting_tree_1 (struct nesting_info *root) |
| { |
| gimple_seq stmt_list; |
| gimple *stmt; |
| tree context = root->context; |
| struct function *sf; |
| |
| stmt_list = NULL; |
| |
| /* If we created a non-local frame type or decl, we need to lay them |
| out at this time. */ |
| if (root->frame_type) |
| { |
| /* Debugging information needs to compute the frame base address of the |
| parent frame out of the static chain from the nested frame. |
| |
| The static chain is the address of the FRAME record, so one could |
| imagine it would be possible to compute the frame base address just |
| adding a constant offset to this address. Unfortunately, this is not |
| possible: if the FRAME object has alignment constraints that are |
| stronger than the stack, then the offset between the frame base and |
| the FRAME object will be dynamic. |
| |
| What we do instead is to append a field to the FRAME object that holds |
| the frame base address: then debug info just has to fetch this |
| field. */ |
| |
| /* Debugging information will refer to the CFA as the frame base |
| address: we will do the same here. */ |
| const tree frame_addr_fndecl |
| = builtin_decl_explicit (BUILT_IN_DWARF_CFA); |
| |
| /* Create a field in the FRAME record to hold the frame base address for |
| this stack frame. Since it will be used only by the debugger, put it |
| at the end of the record in order not to shift all other offsets. */ |
| tree fb_decl = make_node (FIELD_DECL); |
| |
| DECL_NAME (fb_decl) = get_identifier ("FRAME_BASE.PARENT"); |
| TREE_TYPE (fb_decl) = ptr_type_node; |
| TREE_ADDRESSABLE (fb_decl) = 1; |
| DECL_CONTEXT (fb_decl) = root->frame_type; |
| TYPE_FIELDS (root->frame_type) = chainon (TYPE_FIELDS (root->frame_type), |
| fb_decl); |
| |
| /* In some cases the frame type will trigger the -Wpadded warning. |
| This is not helpful; suppress it. */ |
| int save_warn_padded = warn_padded; |
| warn_padded = 0; |
| layout_type (root->frame_type); |
| warn_padded = save_warn_padded; |
| layout_decl (root->frame_decl, 0); |
| |
| /* Initialize the frame base address field. If the builtin we need is |
| not available, set it to NULL so that debugging information does not |
| reference junk. */ |
| tree fb_ref = build3 (COMPONENT_REF, TREE_TYPE (fb_decl), |
| root->frame_decl, fb_decl, NULL_TREE); |
| tree fb_tmp; |
| |
| if (frame_addr_fndecl != NULL_TREE) |
| { |
| gcall *fb_gimple = gimple_build_call (frame_addr_fndecl, 1, |
| integer_zero_node); |
| gimple_stmt_iterator gsi = gsi_last (stmt_list); |
| |
| fb_tmp = init_tmp_var_with_call (root, &gsi, fb_gimple); |
| } |
| else |
| fb_tmp = build_int_cst (TREE_TYPE (fb_ref), 0); |
| gimple_seq_add_stmt (&stmt_list, |
| gimple_build_assign (fb_ref, fb_tmp)); |
| |
| /* Remove root->frame_decl from root->new_local_var_chain, so |
| that we can declare it also in the lexical blocks, which |
| helps ensure virtual regs that end up appearing in its RTL |
| expression get substituted in instantiate_virtual_regs(). */ |
| tree *adjust; |
| for (adjust = &root->new_local_var_chain; |
| *adjust != root->frame_decl; |
| adjust = &DECL_CHAIN (*adjust)) |
| gcc_assert (DECL_CHAIN (*adjust)); |
| *adjust = DECL_CHAIN (*adjust); |
| |
| DECL_CHAIN (root->frame_decl) = NULL_TREE; |
| declare_vars (root->frame_decl, |
| gimple_seq_first_stmt (gimple_body (context)), true); |
| } |
| |
| /* If any parameters were referenced non-locally, then we need to |
| insert a copy. Likewise, if any variables were referenced by |
| pointer, we need to initialize the address. */ |
| if (root->any_parm_remapped) |
| { |
| tree p; |
| for (p = DECL_ARGUMENTS (context); p ; p = DECL_CHAIN (p)) |
| { |
| tree field, x, y; |
| |
| field = lookup_field_for_decl (root, p, NO_INSERT); |
| if (!field) |
| continue; |
| |
| if (use_pointer_in_frame (p)) |
| x = build_addr (p); |
| else |
| x = p; |
| |
| /* If the assignment is from a non-register the stmt is |
| not valid gimple. Make it so by using a temporary instead. */ |
| if (!is_gimple_reg (x) |
| && is_gimple_reg_type (TREE_TYPE (x))) |
| { |
| gimple_stmt_iterator gsi = gsi_last (stmt_list); |
| x = init_tmp_var (root, x, &gsi); |
| } |
| |
| y = build3 (COMPONENT_REF, TREE_TYPE (field), |
| root->frame_decl, field, NULL_TREE); |
| stmt = gimple_build_assign (y, x); |
| gimple_seq_add_stmt (&stmt_list, stmt); |
| } |
| } |
| |
| /* If a chain_field was created, then it needs to be initialized |
| from chain_decl. */ |
| if (root->chain_field) |
| { |
| tree x = build3 (COMPONENT_REF, TREE_TYPE (root->chain_field), |
| root->frame_decl, root->chain_field, NULL_TREE); |
| stmt = gimple_build_assign (x, get_chain_decl (root)); |
| gimple_seq_add_stmt (&stmt_list, stmt); |
| } |
| |
| /* If trampolines were created, then we need to initialize them. */ |
| if (root->any_tramp_created) |
| { |
| struct nesting_info *i; |
| for (i = root->inner; i ; i = i->next) |
| { |
| tree field, x; |
| |
| field = lookup_tramp_for_decl (root, i->context, NO_INSERT); |
| if (!field) |
| continue; |
| |
| x = builtin_decl_implicit <
|