| /* C-family attributes handling. |
| Copyright (C) 1992-2017 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 "target.h" |
| #include "function.h" |
| #include "tree.h" |
| #include "memmodel.h" |
| #include "c-common.h" |
| #include "gimple-expr.h" |
| #include "tm_p.h" |
| #include "stringpool.h" |
| #include "cgraph.h" |
| #include "diagnostic.h" |
| #include "intl.h" |
| #include "stor-layout.h" |
| #include "calls.h" |
| #include "attribs.h" |
| #include "varasm.h" |
| #include "trans-mem.h" |
| #include "c-objc.h" |
| #include "common/common-target.h" |
| #include "langhooks.h" |
| #include "tree-inline.h" |
| #include "toplev.h" |
| #include "tree-iterator.h" |
| #include "opts.h" |
| #include "gimplify.h" |
| |
| static tree handle_packed_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_nocommon_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_common_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_noreturn_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_hot_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_cold_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_no_sanitize_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_no_sanitize_address_attribute (tree *, tree, tree, |
| int, bool *); |
| static tree handle_no_sanitize_thread_attribute (tree *, tree, tree, |
| int, bool *); |
| static tree handle_no_address_safety_analysis_attribute (tree *, tree, tree, |
| int, bool *); |
| static tree handle_no_sanitize_undefined_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_asan_odr_indicator_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_stack_protect_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_noinline_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_noclone_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_nocf_check_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_noicf_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_noipa_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_leaf_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_always_inline_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_gnu_inline_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_artificial_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_flatten_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_error_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_used_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_externally_visible_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_no_reorder_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_const_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_transparent_union_attribute (tree *, tree, tree, |
| int, bool *); |
| static tree handle_scalar_storage_order_attribute (tree *, tree, tree, |
| int, bool *); |
| static tree handle_constructor_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_destructor_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_mode_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_section_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_aligned_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_warn_if_not_aligned_attribute (tree *, tree, tree, |
| int, bool *); |
| static tree handle_weak_attribute (tree *, tree, tree, int, bool *) ; |
| static tree handle_noplt_attribute (tree *, tree, tree, int, bool *) ; |
| static tree handle_alias_ifunc_attribute (bool, tree *, tree, tree, bool *); |
| static tree handle_ifunc_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_alias_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_weakref_attribute (tree *, tree, tree, int, bool *) ; |
| static tree handle_visibility_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_tls_model_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_no_instrument_function_attribute (tree *, tree, |
| tree, int, bool *); |
| static tree handle_no_profile_instrument_function_attribute (tree *, tree, |
| tree, int, bool *); |
| static tree handle_malloc_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_returns_twice_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_no_limit_stack_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_pure_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_tm_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_tm_wrap_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_novops_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_deprecated_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_vector_size_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_nonnull_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_nonstring_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_nothrow_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_cleanup_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_warn_unused_result_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_sentinel_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_type_generic_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_alloc_size_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_alloc_align_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_assume_aligned_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_target_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_target_clones_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_optimize_attribute (tree *, tree, tree, int, bool *); |
| static tree ignore_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_no_split_stack_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_fnspec_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_warn_unused_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_returns_nonnull_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_omp_declare_simd_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_simd_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_omp_declare_target_attribute (tree *, tree, tree, int, |
| bool *); |
| static tree handle_designated_init_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_bnd_variable_size_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_bnd_legacy (tree *, tree, tree, int, bool *); |
| static tree handle_bnd_instrument (tree *, tree, tree, int, bool *); |
| static tree handle_fallthrough_attribute (tree *, tree, tree, int, bool *); |
| static tree handle_patchable_function_entry_attribute (tree *, tree, tree, |
| int, bool *); |
| |
| /* Table of machine-independent attributes common to all C-like languages. |
| |
| All attributes referencing arguments should be additionally processed |
| in chkp_copy_function_type_adding_bounds for correct instrumentation |
| by Pointer Bounds Checker. |
| Current list of processed common attributes: nonnull. */ |
| const struct attribute_spec c_common_attribute_table[] = |
| { |
| /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, |
| affects_type_identity } */ |
| { "packed", 0, 0, false, false, false, |
| handle_packed_attribute , false}, |
| { "nocommon", 0, 0, true, false, false, |
| handle_nocommon_attribute, false}, |
| { "common", 0, 0, true, false, false, |
| handle_common_attribute, false }, |
| /* FIXME: logically, noreturn attributes should be listed as |
| "false, true, true" and apply to function types. But implementing this |
| would require all the places in the compiler that use TREE_THIS_VOLATILE |
| on a decl to identify non-returning functions to be located and fixed |
| to check the function type instead. */ |
| { "noreturn", 0, 0, true, false, false, |
| handle_noreturn_attribute, false }, |
| { "volatile", 0, 0, true, false, false, |
| handle_noreturn_attribute, false }, |
| { "stack_protect", 0, 0, true, false, false, |
| handle_stack_protect_attribute, false }, |
| { "noinline", 0, 0, true, false, false, |
| handle_noinline_attribute, false }, |
| { "noclone", 0, 0, true, false, false, |
| handle_noclone_attribute, false }, |
| { "no_icf", 0, 0, true, false, false, |
| handle_noicf_attribute, false }, |
| { "noipa", 0, 0, true, false, false, |
| handle_noipa_attribute, false }, |
| { "leaf", 0, 0, true, false, false, |
| handle_leaf_attribute, false }, |
| { "always_inline", 0, 0, true, false, false, |
| handle_always_inline_attribute, false }, |
| { "gnu_inline", 0, 0, true, false, false, |
| handle_gnu_inline_attribute, false }, |
| { "artificial", 0, 0, true, false, false, |
| handle_artificial_attribute, false }, |
| { "flatten", 0, 0, true, false, false, |
| handle_flatten_attribute, false }, |
| { "used", 0, 0, true, false, false, |
| handle_used_attribute, false }, |
| { "unused", 0, 0, false, false, false, |
| handle_unused_attribute, false }, |
| { "externally_visible", 0, 0, true, false, false, |
| handle_externally_visible_attribute, false }, |
| { "no_reorder", 0, 0, true, false, false, |
| handle_no_reorder_attribute, false }, |
| /* The same comments as for noreturn attributes apply to const ones. */ |
| { "const", 0, 0, true, false, false, |
| handle_const_attribute, false }, |
| { "scalar_storage_order", 1, 1, false, false, false, |
| handle_scalar_storage_order_attribute, false }, |
| { "transparent_union", 0, 0, false, false, false, |
| handle_transparent_union_attribute, false }, |
| { "constructor", 0, 1, true, false, false, |
| handle_constructor_attribute, false }, |
| { "destructor", 0, 1, true, false, false, |
| handle_destructor_attribute, false }, |
| { "mode", 1, 1, false, true, false, |
| handle_mode_attribute, false }, |
| { "section", 1, 1, true, false, false, |
| handle_section_attribute, false }, |
| { "aligned", 0, 1, false, false, false, |
| handle_aligned_attribute, false }, |
| { "warn_if_not_aligned", 0, 1, false, false, false, |
| handle_warn_if_not_aligned_attribute, |
| false }, |
| { "weak", 0, 0, true, false, false, |
| handle_weak_attribute, false }, |
| { "noplt", 0, 0, true, false, false, |
| handle_noplt_attribute, false }, |
| { "ifunc", 1, 1, true, false, false, |
| handle_ifunc_attribute, false }, |
| { "alias", 1, 1, true, false, false, |
| handle_alias_attribute, false }, |
| { "weakref", 0, 1, true, false, false, |
| handle_weakref_attribute, false }, |
| { "no_instrument_function", 0, 0, true, false, false, |
| handle_no_instrument_function_attribute, |
| false }, |
| { "no_profile_instrument_function", 0, 0, true, false, false, |
| handle_no_profile_instrument_function_attribute, |
| false }, |
| { "malloc", 0, 0, true, false, false, |
| handle_malloc_attribute, false }, |
| { "returns_twice", 0, 0, true, false, false, |
| handle_returns_twice_attribute, false }, |
| { "no_stack_limit", 0, 0, true, false, false, |
| handle_no_limit_stack_attribute, false }, |
| { "pure", 0, 0, true, false, false, |
| handle_pure_attribute, false }, |
| { "transaction_callable", 0, 0, false, true, false, |
| handle_tm_attribute, false }, |
| { "transaction_unsafe", 0, 0, false, true, false, |
| handle_tm_attribute, true }, |
| { "transaction_safe", 0, 0, false, true, false, |
| handle_tm_attribute, true }, |
| { "transaction_safe_dynamic", 0, 0, true, false, false, |
| handle_tm_attribute, false }, |
| { "transaction_may_cancel_outer", 0, 0, false, true, false, |
| handle_tm_attribute, false }, |
| /* ??? These two attributes didn't make the transition from the |
| Intel language document to the multi-vendor language document. */ |
| { "transaction_pure", 0, 0, false, true, false, |
| handle_tm_attribute, false }, |
| { "transaction_wrap", 1, 1, true, false, false, |
| handle_tm_wrap_attribute, false }, |
| /* For internal use (marking of builtins) only. The name contains space |
| to prevent its usage in source code. */ |
| { "no vops", 0, 0, true, false, false, |
| handle_novops_attribute, false }, |
| { "deprecated", 0, 1, false, false, false, |
| handle_deprecated_attribute, false }, |
| { "vector_size", 1, 1, false, true, false, |
| handle_vector_size_attribute, true }, |
| { "visibility", 1, 1, false, false, false, |
| handle_visibility_attribute, false }, |
| { "tls_model", 1, 1, true, false, false, |
| handle_tls_model_attribute, false }, |
| { "nonnull", 0, -1, false, true, true, |
| handle_nonnull_attribute, false }, |
| { "nonstring", 0, 0, true, false, false, |
| handle_nonstring_attribute, false }, |
| { "nothrow", 0, 0, true, false, false, |
| handle_nothrow_attribute, false }, |
| { "may_alias", 0, 0, false, true, false, NULL, false }, |
| { "cleanup", 1, 1, true, false, false, |
| handle_cleanup_attribute, false }, |
| { "warn_unused_result", 0, 0, false, true, true, |
| handle_warn_unused_result_attribute, false }, |
| { "sentinel", 0, 1, false, true, true, |
| handle_sentinel_attribute, false }, |
| /* For internal use (marking of builtins) only. The name contains space |
| to prevent its usage in source code. */ |
| { "type generic", 0, 0, false, true, true, |
| handle_type_generic_attribute, false }, |
| { "alloc_size", 1, 2, false, true, true, |
| handle_alloc_size_attribute, false }, |
| { "cold", 0, 0, true, false, false, |
| handle_cold_attribute, false }, |
| { "hot", 0, 0, true, false, false, |
| handle_hot_attribute, false }, |
| { "no_address_safety_analysis", |
| 0, 0, true, false, false, |
| handle_no_address_safety_analysis_attribute, |
| false }, |
| { "no_sanitize", 1, 1, true, false, false, |
| handle_no_sanitize_attribute, |
| false }, |
| { "no_sanitize_address", 0, 0, true, false, false, |
| handle_no_sanitize_address_attribute, |
| false }, |
| { "no_sanitize_thread", 0, 0, true, false, false, |
| handle_no_sanitize_thread_attribute, |
| false }, |
| { "no_sanitize_undefined", 0, 0, true, false, false, |
| handle_no_sanitize_undefined_attribute, |
| false }, |
| { "asan odr indicator", 0, 0, true, false, false, |
| handle_asan_odr_indicator_attribute, |
| false }, |
| { "warning", 1, 1, true, false, false, |
| handle_error_attribute, false }, |
| { "error", 1, 1, true, false, false, |
| handle_error_attribute, false }, |
| { "target", 1, -1, true, false, false, |
| handle_target_attribute, false }, |
| { "target_clones", 1, -1, true, false, false, |
| handle_target_clones_attribute, false }, |
| { "optimize", 1, -1, true, false, false, |
| handle_optimize_attribute, false }, |
| /* For internal use only. The leading '*' both prevents its usage in |
| source code and signals that it may be overridden by machine tables. */ |
| { "*tm regparm", 0, 0, false, true, true, |
| ignore_attribute, false }, |
| { "no_split_stack", 0, 0, true, false, false, |
| handle_no_split_stack_attribute, false }, |
| /* For internal use (marking of builtins and runtime functions) only. |
| The name contains space to prevent its usage in source code. */ |
| { "fn spec", 1, 1, false, true, true, |
| handle_fnspec_attribute, false }, |
| { "warn_unused", 0, 0, false, false, false, |
| handle_warn_unused_attribute, false }, |
| { "returns_nonnull", 0, 0, false, true, true, |
| handle_returns_nonnull_attribute, false }, |
| { "omp declare simd", 0, -1, true, false, false, |
| handle_omp_declare_simd_attribute, false }, |
| { "cilk simd function", 0, -1, true, false, false, |
| handle_omp_declare_simd_attribute, false }, |
| { "simd", 0, 1, true, false, false, |
| handle_simd_attribute, false }, |
| { "omp declare target", 0, 0, true, false, false, |
| handle_omp_declare_target_attribute, false }, |
| { "omp declare target link", 0, 0, true, false, false, |
| handle_omp_declare_target_attribute, false }, |
| { "alloc_align", 1, 1, false, true, true, |
| handle_alloc_align_attribute, false }, |
| { "assume_aligned", 1, 2, false, true, true, |
| handle_assume_aligned_attribute, false }, |
| { "designated_init", 0, 0, false, true, false, |
| handle_designated_init_attribute, false }, |
| { "bnd_variable_size", 0, 0, true, false, false, |
| handle_bnd_variable_size_attribute, false }, |
| { "bnd_legacy", 0, 0, true, false, false, |
| handle_bnd_legacy, false }, |
| { "bnd_instrument", 0, 0, true, false, false, |
| handle_bnd_instrument, false }, |
| { "fallthrough", 0, 0, false, false, false, |
| handle_fallthrough_attribute, false }, |
| { "patchable_function_entry", 1, 2, true, false, false, |
| handle_patchable_function_entry_attribute, |
| false }, |
| { "nocf_check", 0, 0, false, true, true, |
| handle_nocf_check_attribute, true }, |
| { NULL, 0, 0, false, false, false, NULL, false } |
| }; |
| |
| /* Give the specifications for the format attributes, used by C and all |
| descendants. |
| |
| All attributes referencing arguments should be additionally processed |
| in chkp_copy_function_type_adding_bounds for correct instrumentation |
| by Pointer Bounds Checker. |
| Current list of processed format attributes: format, format_arg. */ |
| const struct attribute_spec c_common_format_attribute_table[] = |
| { |
| /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, |
| affects_type_identity } */ |
| { "format", 3, 3, false, true, true, |
| handle_format_attribute, false }, |
| { "format_arg", 1, 1, false, true, true, |
| handle_format_arg_attribute, false }, |
| { NULL, 0, 0, false, false, false, NULL, false } |
| }; |
| |
| /* Returns TRUE iff the attribute indicated by ATTR_ID takes a plain |
| identifier as an argument, so the front end shouldn't look it up. */ |
| |
| bool |
| attribute_takes_identifier_p (const_tree attr_id) |
| { |
| const struct attribute_spec *spec = lookup_attribute_spec (attr_id); |
| if (spec == NULL) |
| /* Unknown attribute that we'll end up ignoring, return true so we |
| don't complain about an identifier argument. */ |
| return true; |
| else if (!strcmp ("mode", spec->name) |
| || !strcmp ("format", spec->name) |
| || !strcmp ("cleanup", spec->name)) |
| return true; |
| else |
| return targetm.attribute_takes_identifier_p (attr_id); |
| } |
| |
| /* Attribute handlers common to C front ends. */ |
| |
| /* Handle a "packed" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_packed_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int flags, bool *no_add_attrs) |
| { |
| if (TYPE_P (*node)) |
| { |
| if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
| *node = build_variant_type_copy (*node); |
| TYPE_PACKED (*node) = 1; |
| } |
| else if (TREE_CODE (*node) == FIELD_DECL) |
| { |
| if (TYPE_ALIGN (TREE_TYPE (*node)) <= BITS_PER_UNIT |
| /* Still pack bitfields. */ |
| && ! DECL_C_BIT_FIELD (*node)) |
| warning (OPT_Wattributes, |
| "%qE attribute ignored for field of type %qT", |
| name, TREE_TYPE (*node)); |
| else |
| DECL_PACKED (*node) = 1; |
| } |
| /* We can't set DECL_PACKED for a VAR_DECL, because the bit is |
| used for DECL_REGISTER. It wouldn't mean anything anyway. |
| We can't set DECL_PACKED on the type of a TYPE_DECL, because |
| that changes what the typedef is typing. */ |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "nocommon" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_nocommon_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (VAR_P (*node)) |
| DECL_COMMON (*node) = 0; |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "common" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_common_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (VAR_P (*node)) |
| DECL_COMMON (*node) = 1; |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "noreturn" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_noreturn_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| tree type = TREE_TYPE (*node); |
| |
| /* See FIXME comment in c_common_attribute_table. */ |
| if (TREE_CODE (*node) == FUNCTION_DECL |
| || objc_method_decl (TREE_CODE (*node))) |
| TREE_THIS_VOLATILE (*node) = 1; |
| else if (TREE_CODE (type) == POINTER_TYPE |
| && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) |
| TREE_TYPE (*node) |
| = (build_qualified_type |
| (build_pointer_type |
| (build_type_variant (TREE_TYPE (type), |
| TYPE_READONLY (TREE_TYPE (type)), 1)), |
| TYPE_QUALS (type))); |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "hot" and attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_hot_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL |
| || TREE_CODE (*node) == LABEL_DECL) |
| { |
| if (lookup_attribute ("cold", DECL_ATTRIBUTES (*node)) != NULL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
| "with attribute %qs", name, "cold"); |
| *no_add_attrs = true; |
| } |
| /* Most of the rest of the hot processing is done later with |
| lookup_attribute. */ |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "cold" and attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_cold_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL |
| || TREE_CODE (*node) == LABEL_DECL) |
| { |
| if (lookup_attribute ("hot", DECL_ATTRIBUTES (*node)) != NULL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
| "with attribute %qs", name, "hot"); |
| *no_add_attrs = true; |
| } |
| /* Most of the rest of the cold processing is done later with |
| lookup_attribute. */ |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Add FLAGS for a function NODE to no_sanitize_flags in DECL_ATTRIBUTES. */ |
| |
| void |
| add_no_sanitize_value (tree node, unsigned int flags) |
| { |
| tree attr = lookup_attribute ("no_sanitize", DECL_ATTRIBUTES (node)); |
| if (attr) |
| { |
| unsigned int old_value = tree_to_uhwi (TREE_VALUE (attr)); |
| flags |= old_value; |
| |
| if (flags == old_value) |
| return; |
| |
| TREE_VALUE (attr) = build_int_cst (unsigned_type_node, flags); |
| } |
| else |
| DECL_ATTRIBUTES (node) |
| = tree_cons (get_identifier ("no_sanitize"), |
| build_int_cst (unsigned_type_node, flags), |
| DECL_ATTRIBUTES (node)); |
| } |
| |
| /* Handle a "no_sanitize" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_no_sanitize_attribute (tree *node, tree name, tree args, int, |
| bool *no_add_attrs) |
| { |
| *no_add_attrs = true; |
| tree id = TREE_VALUE (args); |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| return NULL_TREE; |
| } |
| |
| if (TREE_CODE (id) != STRING_CST) |
| { |
| error ("no_sanitize argument not a string"); |
| return NULL_TREE; |
| } |
| |
| char *string = ASTRDUP (TREE_STRING_POINTER (id)); |
| unsigned int flags = parse_no_sanitize_attribute (string); |
| |
| add_no_sanitize_value (*node, flags); |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "no_sanitize_address" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_no_sanitize_address_attribute (tree *node, tree name, tree, int, |
| bool *no_add_attrs) |
| { |
| *no_add_attrs = true; |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| else |
| add_no_sanitize_value (*node, SANITIZE_ADDRESS); |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "no_sanitize_thread" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_no_sanitize_thread_attribute (tree *node, tree name, tree, int, |
| bool *no_add_attrs) |
| { |
| *no_add_attrs = true; |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| else |
| add_no_sanitize_value (*node, SANITIZE_THREAD); |
| |
| return NULL_TREE; |
| } |
| |
| |
| /* Handle a "no_address_safety_analysis" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_no_address_safety_analysis_attribute (tree *node, tree name, tree, int, |
| bool *no_add_attrs) |
| { |
| *no_add_attrs = true; |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| else |
| add_no_sanitize_value (*node, SANITIZE_ADDRESS); |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "no_sanitize_undefined" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_no_sanitize_undefined_attribute (tree *node, tree name, tree, int, |
| bool *no_add_attrs) |
| { |
| *no_add_attrs = true; |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| else |
| add_no_sanitize_value (*node, |
| SANITIZE_UNDEFINED | SANITIZE_UNDEFINED_NONDEFAULT); |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle an "asan odr indicator" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_asan_odr_indicator_attribute (tree *, tree, tree, int, bool *) |
| { |
| return NULL_TREE; |
| } |
| |
| /* Handle a "stack_protect" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_stack_protect_attribute (tree *node, tree name, tree, int, |
| bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "noipa" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_noipa_attribute (tree *node, tree name, tree, int, bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "noinline" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_noinline_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL) |
| { |
| if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (*node))) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
| "with attribute %qs", name, "always_inline"); |
| *no_add_attrs = true; |
| } |
| else |
| DECL_UNINLINABLE (*node) = 1; |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "noclone" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_noclone_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "nocf_check" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_nocf_check_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) != FUNCTION_TYPE |
| && TREE_CODE (*node) != METHOD_TYPE) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| else if (!(flag_cf_protection & CF_BRANCH)) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored. Use " |
| "-fcf-protection option to enable it", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "no_icf" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_noicf_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| |
| /* Handle a "always_inline" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_always_inline_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), |
| bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL) |
| { |
| if (lookup_attribute ("noinline", DECL_ATTRIBUTES (*node))) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
| "with %qs attribute", name, "noinline"); |
| *no_add_attrs = true; |
| } |
| else if (lookup_attribute ("target_clones", DECL_ATTRIBUTES (*node))) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
| "with %qs attribute", name, "target_clones"); |
| *no_add_attrs = true; |
| } |
| else |
| /* Set the attribute and mark it for disregarding inline |
| limits. */ |
| DECL_DISREGARD_INLINE_LIMITS (*node) = 1; |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "gnu_inline" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_gnu_inline_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), |
| bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) |
| { |
| /* Do nothing else, just set the attribute. We'll get at |
| it later with lookup_attribute. */ |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "leaf" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_leaf_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| if (!TREE_PUBLIC (*node)) |
| { |
| warning (OPT_Wattributes, "%qE attribute has no effect on unit local " |
| "functions", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle an "artificial" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_artificial_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), |
| bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (*node)) |
| { |
| /* Do nothing else, just set the attribute. We'll get at |
| it later with lookup_attribute. */ |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "flatten" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_flatten_attribute (tree *node, tree name, |
| tree args ATTRIBUTE_UNUSED, |
| int flags ATTRIBUTE_UNUSED, bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL) |
| /* Do nothing else, just set the attribute. We'll get at |
| it later with lookup_attribute. */ |
| ; |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "warning" or "error" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_error_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL |
| && TREE_CODE (TREE_VALUE (args)) == STRING_CST) |
| /* Do nothing else, just set the attribute. We'll get at |
| it later with lookup_attribute. */ |
| ; |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "used" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_used_attribute (tree *pnode, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| tree node = *pnode; |
| |
| if (TREE_CODE (node) == FUNCTION_DECL |
| || (VAR_P (node) && TREE_STATIC (node)) |
| || (TREE_CODE (node) == TYPE_DECL)) |
| { |
| TREE_USED (node) = 1; |
| DECL_PRESERVE_P (node) = 1; |
| if (VAR_P (node)) |
| DECL_READ_P (node) = 1; |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "unused" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| tree |
| handle_unused_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int flags, bool *no_add_attrs) |
| { |
| if (DECL_P (*node)) |
| { |
| tree decl = *node; |
| |
| if (TREE_CODE (decl) == PARM_DECL |
| || VAR_OR_FUNCTION_DECL_P (decl) |
| || TREE_CODE (decl) == LABEL_DECL |
| || TREE_CODE (decl) == CONST_DECL |
| || TREE_CODE (decl) == TYPE_DECL) |
| { |
| TREE_USED (decl) = 1; |
| if (VAR_P (decl) || TREE_CODE (decl) == PARM_DECL) |
| DECL_READ_P (decl) = 1; |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| } |
| else |
| { |
| if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
| *node = build_variant_type_copy (*node); |
| TREE_USED (*node) = 1; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "externally_visible" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_externally_visible_attribute (tree *pnode, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), |
| bool *no_add_attrs) |
| { |
| tree node = *pnode; |
| |
| if (VAR_OR_FUNCTION_DECL_P (node)) |
| { |
| if ((!TREE_STATIC (node) && TREE_CODE (node) != FUNCTION_DECL |
| && !DECL_EXTERNAL (node)) || !TREE_PUBLIC (node)) |
| { |
| warning (OPT_Wattributes, |
| "%qE attribute have effect only on public objects", name); |
| *no_add_attrs = true; |
| } |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle the "no_reorder" attribute. Arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_no_reorder_attribute (tree *pnode, |
| tree name, |
| tree, |
| int, |
| bool *no_add_attrs) |
| { |
| tree node = *pnode; |
| |
| if (!VAR_OR_FUNCTION_DECL_P (node) |
| && !(TREE_STATIC (node) || DECL_EXTERNAL (node))) |
| { |
| warning (OPT_Wattributes, |
| "%qE attribute only affects top level objects", |
| name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "const" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_const_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| tree type = TREE_TYPE (*node); |
| |
| /* See FIXME comment on noreturn in c_common_attribute_table. */ |
| if (TREE_CODE (*node) == FUNCTION_DECL) |
| TREE_READONLY (*node) = 1; |
| else if (TREE_CODE (type) == POINTER_TYPE |
| && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) |
| TREE_TYPE (*node) |
| = (build_qualified_type |
| (build_pointer_type |
| (build_type_variant (TREE_TYPE (type), 1, |
| TREE_THIS_VOLATILE (TREE_TYPE (type)))), |
| TYPE_QUALS (type))); |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "scalar_storage_order" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_scalar_storage_order_attribute (tree *node, tree name, tree args, |
| int flags, bool *no_add_attrs) |
| { |
| tree id = TREE_VALUE (args); |
| tree type; |
| |
| if (TREE_CODE (*node) == TYPE_DECL |
| && ! (flags & ATTR_FLAG_CXX11)) |
| node = &TREE_TYPE (*node); |
| type = *node; |
| |
| if (BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN) |
| { |
| error ("scalar_storage_order is not supported because endianness " |
| "is not uniform"); |
| return NULL_TREE; |
| } |
| |
| if (RECORD_OR_UNION_TYPE_P (type) && !c_dialect_cxx ()) |
| { |
| bool reverse = false; |
| |
| if (TREE_CODE (id) == STRING_CST |
| && strcmp (TREE_STRING_POINTER (id), "big-endian") == 0) |
| reverse = !BYTES_BIG_ENDIAN; |
| else if (TREE_CODE (id) == STRING_CST |
| && strcmp (TREE_STRING_POINTER (id), "little-endian") == 0) |
| reverse = BYTES_BIG_ENDIAN; |
| else |
| { |
| error ("scalar_storage_order argument must be one of \"big-endian\"" |
| " or \"little-endian\""); |
| return NULL_TREE; |
| } |
| |
| if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
| { |
| if (reverse) |
| /* A type variant isn't good enough, since we don't want a cast |
| to such a type to be removed as a no-op. */ |
| *node = type = build_duplicate_type (type); |
| } |
| |
| TYPE_REVERSE_STORAGE_ORDER (type) = reverse; |
| return NULL_TREE; |
| } |
| |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| /* Handle a "transparent_union" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_transparent_union_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), int flags, |
| bool *no_add_attrs) |
| { |
| tree type; |
| |
| *no_add_attrs = true; |
| |
| if (TREE_CODE (*node) == TYPE_DECL |
| && ! (flags & ATTR_FLAG_CXX11)) |
| node = &TREE_TYPE (*node); |
| type = *node; |
| |
| if (TREE_CODE (type) == UNION_TYPE) |
| { |
| /* Make sure that the first field will work for a transparent union. |
| If the type isn't complete yet, leave the check to the code in |
| finish_struct. */ |
| if (TYPE_SIZE (type)) |
| { |
| tree first = first_field (type); |
| if (first == NULL_TREE |
| || DECL_ARTIFICIAL (first) |
| || TYPE_MODE (type) != DECL_MODE (first)) |
| goto ignored; |
| } |
| |
| if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
| { |
| /* If the type isn't complete yet, setting the flag |
| on a variant wouldn't ever be checked. */ |
| if (!TYPE_SIZE (type)) |
| goto ignored; |
| |
| /* build_duplicate_type doesn't work for C++. */ |
| if (c_dialect_cxx ()) |
| goto ignored; |
| |
| /* A type variant isn't good enough, since we don't want a cast |
| to such a type to be removed as a no-op. */ |
| *node = type = build_duplicate_type (type); |
| } |
| |
| for (tree t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) |
| TYPE_TRANSPARENT_AGGR (t) = 1; |
| return NULL_TREE; |
| } |
| |
| ignored: |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| return NULL_TREE; |
| } |
| |
| /* Subroutine of handle_{con,de}structor_attribute. Evaluate ARGS to |
| get the requested priority for a constructor or destructor, |
| possibly issuing diagnostics for invalid or reserved |
| priorities. */ |
| |
| static priority_type |
| get_priority (tree args, bool is_destructor) |
| { |
| HOST_WIDE_INT pri; |
| tree arg; |
| |
| if (!args) |
| return DEFAULT_INIT_PRIORITY; |
| |
| if (!SUPPORTS_INIT_PRIORITY) |
| { |
| if (is_destructor) |
| error ("destructor priorities are not supported"); |
| else |
| error ("constructor priorities are not supported"); |
| return DEFAULT_INIT_PRIORITY; |
| } |
| |
| arg = TREE_VALUE (args); |
| if (TREE_CODE (arg) == IDENTIFIER_NODE) |
| goto invalid; |
| if (arg == error_mark_node) |
| return DEFAULT_INIT_PRIORITY; |
| arg = default_conversion (arg); |
| if (!tree_fits_shwi_p (arg) |
| || !INTEGRAL_TYPE_P (TREE_TYPE (arg))) |
| goto invalid; |
| |
| pri = tree_to_shwi (arg); |
| if (pri < 0 || pri > MAX_INIT_PRIORITY) |
| goto invalid; |
| |
| if (pri <= MAX_RESERVED_INIT_PRIORITY) |
| { |
| if (is_destructor) |
| warning (0, |
| "destructor priorities from 0 to %d are reserved " |
| "for the implementation", |
| MAX_RESERVED_INIT_PRIORITY); |
| else |
| warning (0, |
| "constructor priorities from 0 to %d are reserved " |
| "for the implementation", |
| MAX_RESERVED_INIT_PRIORITY); |
| } |
| return pri; |
| |
| invalid: |
| if (is_destructor) |
| error ("destructor priorities must be integers from 0 to %d inclusive", |
| MAX_INIT_PRIORITY); |
| else |
| error ("constructor priorities must be integers from 0 to %d inclusive", |
| MAX_INIT_PRIORITY); |
| return DEFAULT_INIT_PRIORITY; |
| } |
| |
| /* Handle a "constructor" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_constructor_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), |
| bool *no_add_attrs) |
| { |
| tree decl = *node; |
| tree type = TREE_TYPE (decl); |
| |
| if (TREE_CODE (decl) == FUNCTION_DECL |
| && TREE_CODE (type) == FUNCTION_TYPE |
| && decl_function_context (decl) == 0) |
| { |
| priority_type priority; |
| DECL_STATIC_CONSTRUCTOR (decl) = 1; |
| priority = get_priority (args, /*is_destructor=*/false); |
| SET_DECL_INIT_PRIORITY (decl, priority); |
| TREE_USED (decl) = 1; |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "destructor" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_destructor_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), |
| bool *no_add_attrs) |
| { |
| tree decl = *node; |
| tree type = TREE_TYPE (decl); |
| |
| if (TREE_CODE (decl) == FUNCTION_DECL |
| && TREE_CODE (type) == FUNCTION_TYPE |
| && decl_function_context (decl) == 0) |
| { |
| priority_type priority; |
| DECL_STATIC_DESTRUCTOR (decl) = 1; |
| priority = get_priority (args, /*is_destructor=*/true); |
| SET_DECL_FINI_PRIORITY (decl, priority); |
| TREE_USED (decl) = 1; |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Nonzero if the mode is a valid vector mode for this architecture. |
| This returns nonzero even if there is no hardware support for the |
| vector mode, but we can emulate with narrower modes. */ |
| |
| static bool |
| vector_mode_valid_p (machine_mode mode) |
| { |
| enum mode_class mclass = GET_MODE_CLASS (mode); |
| |
| /* Doh! What's going on? */ |
| if (mclass != MODE_VECTOR_INT |
| && mclass != MODE_VECTOR_FLOAT |
| && mclass != MODE_VECTOR_FRACT |
| && mclass != MODE_VECTOR_UFRACT |
| && mclass != MODE_VECTOR_ACCUM |
| && mclass != MODE_VECTOR_UACCUM) |
| return false; |
| |
| /* Hardware support. Woo hoo! */ |
| if (targetm.vector_mode_supported_p (mode)) |
| return true; |
| |
| /* We should probably return 1 if requesting V4DI and we have no DI, |
| but we have V2DI, but this is probably very unlikely. */ |
| |
| /* If we have support for the inner mode, we can safely emulate it. |
| We may not have V2DI, but me can emulate with a pair of DIs. */ |
| return targetm.scalar_mode_supported_p (GET_MODE_INNER (mode)); |
| } |
| |
| |
| /* Handle a "mode" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_mode_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| tree type = *node; |
| tree ident = TREE_VALUE (args); |
| |
| *no_add_attrs = true; |
| |
| if (TREE_CODE (ident) != IDENTIFIER_NODE) |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| else |
| { |
| int j; |
| const char *p = IDENTIFIER_POINTER (ident); |
| int len = strlen (p); |
| machine_mode mode = VOIDmode; |
| tree typefm; |
| bool valid_mode; |
| |
| if (len > 4 && p[0] == '_' && p[1] == '_' |
| && p[len - 1] == '_' && p[len - 2] == '_') |
| { |
| char *newp = (char *) alloca (len - 1); |
| |
| strcpy (newp, &p[2]); |
| newp[len - 4] = '\0'; |
| p = newp; |
| } |
| |
| /* Change this type to have a type with the specified mode. |
| First check for the special modes. */ |
| if (!strcmp (p, "byte")) |
| mode = byte_mode; |
| else if (!strcmp (p, "word")) |
| mode = word_mode; |
| else if (!strcmp (p, "pointer")) |
| mode = ptr_mode; |
| else if (!strcmp (p, "libgcc_cmp_return")) |
| mode = targetm.libgcc_cmp_return_mode (); |
| else if (!strcmp (p, "libgcc_shift_count")) |
| mode = targetm.libgcc_shift_count_mode (); |
| else if (!strcmp (p, "unwind_word")) |
| mode = targetm.unwind_word_mode (); |
| else |
| for (j = 0; j < NUM_MACHINE_MODES; j++) |
| if (!strcmp (p, GET_MODE_NAME (j))) |
| { |
| mode = (machine_mode) j; |
| break; |
| } |
| |
| if (mode == VOIDmode) |
| { |
| error ("unknown machine mode %qE", ident); |
| return NULL_TREE; |
| } |
| |
| valid_mode = false; |
| switch (GET_MODE_CLASS (mode)) |
| { |
| case MODE_INT: |
| case MODE_PARTIAL_INT: |
| case MODE_FLOAT: |
| case MODE_DECIMAL_FLOAT: |
| case MODE_FRACT: |
| case MODE_UFRACT: |
| case MODE_ACCUM: |
| case MODE_UACCUM: |
| valid_mode |
| = targetm.scalar_mode_supported_p (as_a <scalar_mode> (mode)); |
| break; |
| |
| case MODE_COMPLEX_INT: |
| case MODE_COMPLEX_FLOAT: |
| valid_mode = targetm.scalar_mode_supported_p (GET_MODE_INNER (mode)); |
| break; |
| |
| case MODE_VECTOR_INT: |
| case MODE_VECTOR_FLOAT: |
| case MODE_VECTOR_FRACT: |
| case MODE_VECTOR_UFRACT: |
| case MODE_VECTOR_ACCUM: |
| case MODE_VECTOR_UACCUM: |
| warning (OPT_Wattributes, "specifying vector types with " |
| "__attribute__ ((mode)) is deprecated"); |
| warning (OPT_Wattributes, |
| "use __attribute__ ((vector_size)) instead"); |
| valid_mode = vector_mode_valid_p (mode); |
| break; |
| |
| default: |
| break; |
| } |
| if (!valid_mode) |
| { |
| error ("unable to emulate %qs", p); |
| return NULL_TREE; |
| } |
| |
| if (POINTER_TYPE_P (type)) |
| { |
| scalar_int_mode addr_mode; |
| addr_space_t as = TYPE_ADDR_SPACE (TREE_TYPE (type)); |
| tree (*fn)(tree, machine_mode, bool); |
| |
| if (!is_a <scalar_int_mode> (mode, &addr_mode) |
| || !targetm.addr_space.valid_pointer_mode (addr_mode, as)) |
| { |
| error ("invalid pointer mode %qs", p); |
| return NULL_TREE; |
| } |
| |
| if (TREE_CODE (type) == POINTER_TYPE) |
| fn = build_pointer_type_for_mode; |
| else |
| fn = build_reference_type_for_mode; |
| typefm = fn (TREE_TYPE (type), addr_mode, false); |
| } |
| else |
| { |
| /* For fixed-point modes, we need to test if the signness of type |
| and the machine mode are consistent. */ |
| if (ALL_FIXED_POINT_MODE_P (mode) |
| && TYPE_UNSIGNED (type) != UNSIGNED_FIXED_POINT_MODE_P (mode)) |
| { |
| error ("signedness of type and machine mode %qs don%'t match", p); |
| return NULL_TREE; |
| } |
| /* For fixed-point modes, we need to pass saturating info. */ |
| typefm = lang_hooks.types.type_for_mode (mode, |
| ALL_FIXED_POINT_MODE_P (mode) ? TYPE_SATURATING (type) |
| : TYPE_UNSIGNED (type)); |
| } |
| |
| if (typefm == NULL_TREE) |
| { |
| error ("no data type for mode %qs", p); |
| return NULL_TREE; |
| } |
| else if (TREE_CODE (type) == ENUMERAL_TYPE) |
| { |
| /* For enumeral types, copy the precision from the integer |
| type returned above. If not an INTEGER_TYPE, we can't use |
| this mode for this type. */ |
| if (TREE_CODE (typefm) != INTEGER_TYPE) |
| { |
| error ("cannot use mode %qs for enumeral types", p); |
| return NULL_TREE; |
| } |
| |
| if (flags & ATTR_FLAG_TYPE_IN_PLACE) |
| { |
| TYPE_PRECISION (type) = TYPE_PRECISION (typefm); |
| typefm = type; |
| } |
| else |
| { |
| /* We cannot build a type variant, as there's code that assumes |
| that TYPE_MAIN_VARIANT has the same mode. This includes the |
| debug generators. Instead, create a subrange type. This |
| results in all of the enumeral values being emitted only once |
| in the original, and the subtype gets them by reference. */ |
| if (TYPE_UNSIGNED (type)) |
| typefm = make_unsigned_type (TYPE_PRECISION (typefm)); |
| else |
| typefm = make_signed_type (TYPE_PRECISION (typefm)); |
| TREE_TYPE (typefm) = type; |
| } |
| } |
| else if (VECTOR_MODE_P (mode) |
| ? TREE_CODE (type) != TREE_CODE (TREE_TYPE (typefm)) |
| : TREE_CODE (type) != TREE_CODE (typefm)) |
| { |
| error ("mode %qs applied to inappropriate type", p); |
| return NULL_TREE; |
| } |
| |
| *node = build_qualified_type (typefm, TYPE_QUALS (type)); |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "section" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_section_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| tree decl = *node; |
| |
| if (!targetm_common.have_named_sections) |
| { |
| error_at (DECL_SOURCE_LOCATION (*node), |
| "section attributes are not supported for this target"); |
| goto fail; |
| } |
| |
| if (!VAR_OR_FUNCTION_DECL_P (decl)) |
| { |
| error ("section attribute not allowed for %q+D", *node); |
| goto fail; |
| } |
| |
| if (TREE_CODE (TREE_VALUE (args)) != STRING_CST) |
| { |
| error ("section attribute argument not a string constant"); |
| goto fail; |
| } |
| |
| if (VAR_P (decl) |
| && current_function_decl != NULL_TREE |
| && !TREE_STATIC (decl)) |
| { |
| error_at (DECL_SOURCE_LOCATION (decl), |
| "section attribute cannot be specified for local variables"); |
| goto fail; |
| } |
| |
| /* The decl may have already been given a section attribute |
| from a previous declaration. Ensure they match. */ |
| if (DECL_SECTION_NAME (decl) != NULL |
| && strcmp (DECL_SECTION_NAME (decl), |
| TREE_STRING_POINTER (TREE_VALUE (args))) != 0) |
| { |
| error ("section of %q+D conflicts with previous declaration", *node); |
| goto fail; |
| } |
| |
| if (VAR_P (decl) |
| && !targetm.have_tls && targetm.emutls.tmpl_section |
| && DECL_THREAD_LOCAL_P (decl)) |
| { |
| error ("section of %q+D cannot be overridden", *node); |
| goto fail; |
| } |
| |
| set_decl_section_name (decl, TREE_STRING_POINTER (TREE_VALUE (args))); |
| return NULL_TREE; |
| |
| fail: |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| /* If in c++-11, check if the c++-11 alignment constraint with respect |
| to fundamental alignment (in [dcl.align]) are satisfied. If not in |
| c++-11 mode, does nothing. |
| |
| [dcl.align]2/ says: |
| |
| [* if the constant expression evaluates to a fundamental alignment, |
| the alignment requirement of the declared entity shall be the |
| specified fundamental alignment. |
| |
| * if the constant expression evaluates to an extended alignment |
| and the implementation supports that alignment in the context |
| of the declaration, the alignment of the declared entity shall |
| be that alignment |
| |
| * if the constant expression evaluates to an extended alignment |
| and the implementation does not support that alignment in the |
| context of the declaration, the program is ill-formed]. */ |
| |
| static bool |
| check_cxx_fundamental_alignment_constraints (tree node, |
| unsigned align_log, |
| int flags) |
| { |
| bool alignment_too_large_p = false; |
| unsigned requested_alignment = (1U << align_log) * BITS_PER_UNIT; |
| unsigned max_align = 0; |
| |
| if ((!(flags & ATTR_FLAG_CXX11) && !warn_cxx_compat) |
| || (node == NULL_TREE || node == error_mark_node)) |
| return true; |
| |
| if (cxx_fundamental_alignment_p (requested_alignment)) |
| return true; |
| |
| if (VAR_P (node)) |
| { |
| if (TREE_STATIC (node) || DECL_EXTERNAL (node)) |
| /* For file scope variables and static members, the target supports |
| alignments that are at most MAX_OFILE_ALIGNMENT. */ |
| max_align = MAX_OFILE_ALIGNMENT; |
| else |
| /* For stack variables, the target supports at most |
| MAX_STACK_ALIGNMENT. */ |
| max_align = MAX_STACK_ALIGNMENT; |
| if (requested_alignment > max_align) |
| alignment_too_large_p = true; |
| } |
| /* Let's be liberal for types and fields; don't limit their alignment any |
| more than check_user_alignment already did. */ |
| |
| if (alignment_too_large_p) |
| pedwarn (input_location, OPT_Wattributes, |
| "requested alignment %d is larger than %d", |
| requested_alignment / BITS_PER_UNIT, max_align / BITS_PER_UNIT); |
| |
| return !alignment_too_large_p; |
| } |
| |
| /* Common codes shared by handle_warn_if_not_aligned_attribute and |
| handle_aligned_attribute. */ |
| |
| static tree |
| common_handle_aligned_attribute (tree *node, tree args, int flags, |
| bool *no_add_attrs, |
| bool warn_if_not_aligned_p) |
| { |
| tree decl = NULL_TREE; |
| tree *type = NULL; |
| int is_type = 0; |
| tree align_expr; |
| int i; |
| |
| if (args) |
| { |
| align_expr = TREE_VALUE (args); |
| if (align_expr && TREE_CODE (align_expr) != IDENTIFIER_NODE |
| && TREE_CODE (align_expr) != FUNCTION_DECL) |
| align_expr = default_conversion (align_expr); |
| } |
| else |
| align_expr = size_int (ATTRIBUTE_ALIGNED_VALUE / BITS_PER_UNIT); |
| |
| if (DECL_P (*node)) |
| { |
| decl = *node; |
| type = &TREE_TYPE (decl); |
| is_type = TREE_CODE (*node) == TYPE_DECL; |
| } |
| else if (TYPE_P (*node)) |
| type = node, is_type = 1; |
| |
| if ((i = check_user_alignment (align_expr, true)) == -1 |
| || !check_cxx_fundamental_alignment_constraints (*node, i, flags)) |
| *no_add_attrs = true; |
| else if (is_type) |
| { |
| if ((flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
| /* OK, modify the type in place. */; |
| /* If we have a TYPE_DECL, then copy the type, so that we |
| don't accidentally modify a builtin type. See pushdecl. */ |
| else if (decl && TREE_TYPE (decl) != error_mark_node |
| && DECL_ORIGINAL_TYPE (decl) == NULL_TREE) |
| { |
| tree tt = TREE_TYPE (decl); |
| *type = build_variant_type_copy (*type); |
| DECL_ORIGINAL_TYPE (decl) = tt; |
| TYPE_NAME (*type) = decl; |
| TREE_USED (*type) = TREE_USED (decl); |
| TREE_TYPE (decl) = *type; |
| } |
| else |
| *type = build_variant_type_copy (*type); |
| |
| if (warn_if_not_aligned_p) |
| { |
| SET_TYPE_WARN_IF_NOT_ALIGN (*type, (1U << i) * BITS_PER_UNIT); |
| warn_if_not_aligned_p = false; |
| } |
| else |
| { |
| SET_TYPE_ALIGN (*type, (1U << i) * BITS_PER_UNIT); |
| TYPE_USER_ALIGN (*type) = 1; |
| } |
| } |
| else if (! VAR_OR_FUNCTION_DECL_P (decl) |
| && TREE_CODE (decl) != FIELD_DECL) |
| { |
| error ("alignment may not be specified for %q+D", decl); |
| *no_add_attrs = true; |
| } |
| else if (DECL_USER_ALIGN (decl) |
| && DECL_ALIGN (decl) > (1U << i) * BITS_PER_UNIT) |
| /* C++-11 [dcl.align/4]: |
| |
| When multiple alignment-specifiers are specified for an |
| entity, the alignment requirement shall be set to the |
| strictest specified alignment. |
| |
| This formally comes from the c++11 specification but we are |
| doing it for the GNU attribute syntax as well. */ |
| *no_add_attrs = true; |
| else if (!warn_if_not_aligned_p |
| && TREE_CODE (decl) == FUNCTION_DECL |
| && DECL_ALIGN (decl) > (1U << i) * BITS_PER_UNIT) |
| { |
| /* Don't warn function alignment here if warn_if_not_aligned_p is |
| true. It will be warned later. */ |
| if (DECL_USER_ALIGN (decl)) |
| error ("alignment for %q+D was previously specified as %d " |
| "and may not be decreased", decl, |
| DECL_ALIGN (decl) / BITS_PER_UNIT); |
| else |
| error ("alignment for %q+D must be at least %d", decl, |
| DECL_ALIGN (decl) / BITS_PER_UNIT); |
| *no_add_attrs = true; |
| } |
| else |
| { |
| if (warn_if_not_aligned_p) |
| { |
| if (TREE_CODE (decl) == FIELD_DECL && !DECL_C_BIT_FIELD (decl)) |
| { |
| SET_DECL_WARN_IF_NOT_ALIGN (decl, (1U << i) * BITS_PER_UNIT); |
| warn_if_not_aligned_p = false; |
| } |
| } |
| else |
| { |
| SET_DECL_ALIGN (decl, (1U << i) * BITS_PER_UNIT); |
| DECL_USER_ALIGN (decl) = 1; |
| } |
| } |
| |
| if (warn_if_not_aligned_p) |
| { |
| error ("%<warn_if_not_aligned%> may not be specified for %q+D", |
| decl); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "aligned" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_aligned_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
| int flags, bool *no_add_attrs) |
| { |
| return common_handle_aligned_attribute (node, args, flags, |
| no_add_attrs, false); |
| } |
| |
| /* Handle a "warn_if_not_aligned" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_warn_if_not_aligned_attribute (tree *node, tree ARG_UNUSED (name), |
| tree args, int flags, |
| bool *no_add_attrs) |
| { |
| return common_handle_aligned_attribute (node, args, flags, |
| no_add_attrs, true); |
| } |
| |
| /* Handle a "weak" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_weak_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), |
| bool * ARG_UNUSED (no_add_attrs)) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL |
| && DECL_DECLARED_INLINE_P (*node)) |
| { |
| warning (OPT_Wattributes, "inline function %q+D declared weak", *node); |
| *no_add_attrs = true; |
| } |
| else if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (*node))) |
| { |
| error ("indirect function %q+D cannot be declared weak", *node); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| else if (VAR_OR_FUNCTION_DECL_P (*node)) |
| declare_weak (*node); |
| else |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "noplt" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_noplt_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), |
| bool * ARG_UNUSED (no_add_attrs)) |
| { |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning (OPT_Wattributes, |
| "%qE attribute is only applicable on functions", name); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| return NULL_TREE; |
| } |
| |
| /* Handle an "alias" or "ifunc" attribute; arguments as in |
| struct attribute_spec.handler, except that IS_ALIAS tells us |
| whether this is an alias as opposed to ifunc attribute. */ |
| |
| static tree |
| handle_alias_ifunc_attribute (bool is_alias, tree *node, tree name, tree args, |
| bool *no_add_attrs) |
| { |
| tree decl = *node; |
| |
| if (TREE_CODE (decl) != FUNCTION_DECL |
| && (!is_alias || !VAR_P (decl))) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| else if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl)) |
| || (TREE_CODE (decl) != FUNCTION_DECL |
| && TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl)) |
| /* A static variable declaration is always a tentative definition, |
| but the alias is a non-tentative definition which overrides. */ |
| || (TREE_CODE (decl) != FUNCTION_DECL |
| && ! TREE_PUBLIC (decl) && DECL_INITIAL (decl))) |
| { |
| error ("%q+D defined both normally and as %qE attribute", decl, name); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| else if (!is_alias |
| && (lookup_attribute ("weak", DECL_ATTRIBUTES (decl)) |
| || lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)))) |
| { |
| error ("weak %q+D cannot be defined %qE", decl, name); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| /* Note that the very first time we process a nested declaration, |
| decl_function_context will not be set. Indeed, *would* never |
| be set except for the DECL_INITIAL/DECL_EXTERNAL frobbery that |
| we do below. After such frobbery, pushdecl would set the context. |
| In any case, this is never what we want. */ |
| else if (decl_function_context (decl) == 0 && current_function_decl == NULL) |
| { |
| tree id; |
| |
| id = TREE_VALUE (args); |
| if (TREE_CODE (id) != STRING_CST) |
| { |
| error ("attribute %qE argument not a string", name); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| id = get_identifier (TREE_STRING_POINTER (id)); |
| /* This counts as a use of the object pointed to. */ |
| TREE_USED (id) = 1; |
| |
| if (TREE_CODE (decl) == FUNCTION_DECL) |
| DECL_INITIAL (decl) = error_mark_node; |
| else |
| TREE_STATIC (decl) = 1; |
| |
| if (!is_alias) |
| { |
| /* ifuncs are also aliases, so set that attribute too. */ |
| DECL_ATTRIBUTES (decl) |
| = tree_cons (get_identifier ("alias"), args, |
| DECL_ATTRIBUTES (decl)); |
| DECL_ATTRIBUTES (decl) = tree_cons (get_identifier ("ifunc"), |
| NULL, DECL_ATTRIBUTES (decl)); |
| } |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| if (decl_in_symtab_p (*node)) |
| { |
| struct symtab_node *n = symtab_node::get (decl); |
| if (n && n->refuse_visibility_changes) |
| { |
| if (is_alias) |
| error ("%+qD declared alias after being used", decl); |
| else |
| error ("%+qD declared ifunc after being used", decl); |
| } |
| } |
| |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle an "alias" or "ifunc" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_ifunc_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| return handle_alias_ifunc_attribute (false, node, name, args, no_add_attrs); |
| } |
| |
| /* Handle an "alias" or "ifunc" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_alias_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| return handle_alias_ifunc_attribute (true, node, name, args, no_add_attrs); |
| } |
| |
| /* Handle a "weakref" attribute; arguments as in struct |
| attribute_spec.handler. */ |
| |
| static tree |
| handle_weakref_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
| int flags, bool *no_add_attrs) |
| { |
| tree attr = NULL_TREE; |
| |
| /* We must ignore the attribute when it is associated with |
| local-scoped decls, since attribute alias is ignored and many |
| such symbols do not even have a DECL_WEAK field. */ |
| if (decl_function_context (*node) |
| || current_function_decl |
| || !VAR_OR_FUNCTION_DECL_P (*node)) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (*node))) |
| { |
| error ("indirect function %q+D cannot be declared weakref", *node); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| /* The idea here is that `weakref("name")' mutates into `weakref, |
| alias("name")', and weakref without arguments, in turn, |
| implicitly adds weak. */ |
| |
| if (args) |
| { |
| attr = tree_cons (get_identifier ("alias"), args, attr); |
| attr = tree_cons (get_identifier ("weakref"), NULL_TREE, attr); |
| |
| *no_add_attrs = true; |
| |
| decl_attributes (node, attr, flags); |
| } |
| else |
| { |
| if (lookup_attribute ("alias", DECL_ATTRIBUTES (*node))) |
| error_at (DECL_SOURCE_LOCATION (*node), |
| "weakref attribute must appear before alias attribute"); |
| |
| /* Can't call declare_weak because it wants this to be TREE_PUBLIC, |
| and that isn't supported; and because it wants to add it to |
| the list of weak decls, which isn't helpful. */ |
| DECL_WEAK (*node) = 1; |
| } |
| |
| if (decl_in_symtab_p (*node)) |
| { |
| struct symtab_node *n = symtab_node::get (*node); |
| if (n && n->refuse_visibility_changes) |
| error ("%+qD declared weakref after being used", *node); |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle an "visibility" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_visibility_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), |
| bool *ARG_UNUSED (no_add_attrs)) |
| { |
| tree decl = *node; |
| tree id = TREE_VALUE (args); |
| enum symbol_visibility vis; |
| |
| if (TYPE_P (*node)) |
| { |
| if (TREE_CODE (*node) == ENUMERAL_TYPE) |
| /* OK */; |
| else if (!RECORD_OR_UNION_TYPE_P (*node)) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored on non-class types", |
| name); |
| return NULL_TREE; |
| } |
| else if (TYPE_FIELDS (*node)) |
| { |
| error ("%qE attribute ignored because %qT is already defined", |
| name, *node); |
| return NULL_TREE; |
| } |
| } |
| else if (decl_function_context (decl) != 0 || !TREE_PUBLIC (decl)) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| return NULL_TREE; |
| } |
| |
| if (TREE_CODE (id) != STRING_CST) |
| { |
| error ("visibility argument not a string"); |
| return NULL_TREE; |
| } |
| |
| /* If this is a type, set the visibility on the type decl. */ |
| if (TYPE_P (decl)) |
| { |
| decl = TYPE_NAME (decl); |
| if (!decl) |
| return NULL_TREE; |
| if (TREE_CODE (decl) == IDENTIFIER_NODE) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored on types", |
| name); |
| return NULL_TREE; |
| } |
| } |
| |
| if (strcmp (TREE_STRING_POINTER (id), "default") == 0) |
| vis = VISIBILITY_DEFAULT; |
| else if (strcmp (TREE_STRING_POINTER (id), "internal") == 0) |
| vis = VISIBILITY_INTERNAL; |
| else if (strcmp (TREE_STRING_POINTER (id), "hidden") == 0) |
| vis = VISIBILITY_HIDDEN; |
| else if (strcmp (TREE_STRING_POINTER (id), "protected") == 0) |
| vis = VISIBILITY_PROTECTED; |
| else |
| { |
| error ("visibility argument must be one of \"default\", \"hidden\", \"protected\" or \"internal\""); |
| vis = VISIBILITY_DEFAULT; |
| } |
| |
| if (DECL_VISIBILITY_SPECIFIED (decl) |
| && vis != DECL_VISIBILITY (decl)) |
| { |
| tree attributes = (TYPE_P (*node) |
| ? TYPE_ATTRIBUTES (*node) |
| : DECL_ATTRIBUTES (decl)); |
| if (lookup_attribute ("visibility", attributes)) |
| error ("%qD redeclared with different visibility", decl); |
| else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES |
| && lookup_attribute ("dllimport", attributes)) |
| error ("%qD was declared %qs which implies default visibility", |
| decl, "dllimport"); |
| else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES |
| && lookup_attribute ("dllexport", attributes)) |
| error ("%qD was declared %qs which implies default visibility", |
| decl, "dllexport"); |
| } |
| |
| DECL_VISIBILITY (decl) = vis; |
| DECL_VISIBILITY_SPECIFIED (decl) = 1; |
| |
| /* Go ahead and attach the attribute to the node as well. This is needed |
| so we can determine whether we have VISIBILITY_DEFAULT because the |
| visibility was not specified, or because it was explicitly overridden |
| from the containing scope. */ |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle an "tls_model" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_tls_model_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| tree id; |
| tree decl = *node; |
| enum tls_model kind; |
| |
| *no_add_attrs = true; |
| |
| if (!VAR_P (decl) || !DECL_THREAD_LOCAL_P (decl)) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| return NULL_TREE; |
| } |
| |
| kind = DECL_TLS_MODEL (decl); |
| id = TREE_VALUE (args); |
| if (TREE_CODE (id) != STRING_CST) |
| { |
| error ("tls_model argument not a string"); |
| return NULL_TREE; |
| } |
| |
| if (!strcmp (TREE_STRING_POINTER (id), "local-exec")) |
| kind = TLS_MODEL_LOCAL_EXEC; |
| else if (!strcmp (TREE_STRING_POINTER (id), "initial-exec")) |
| kind = TLS_MODEL_INITIAL_EXEC; |
| else if (!strcmp (TREE_STRING_POINTER (id), "local-dynamic")) |
| kind = optimize ? TLS_MODEL_LOCAL_DYNAMIC : TLS_MODEL_GLOBAL_DYNAMIC; |
| else if (!strcmp (TREE_STRING_POINTER (id), "global-dynamic")) |
| kind = TLS_MODEL_GLOBAL_DYNAMIC; |
| else |
| error ("tls_model argument must be one of \"local-exec\", \"initial-exec\", \"local-dynamic\" or \"global-dynamic\""); |
| |
| set_decl_tls_model (decl, kind); |
| return NULL_TREE; |
| } |
| |
| /* Handle a "no_instrument_function" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_no_instrument_function_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), |
| bool *no_add_attrs) |
| { |
| tree decl = *node; |
| |
| if (TREE_CODE (decl) != FUNCTION_DECL) |
| { |
| error_at (DECL_SOURCE_LOCATION (decl), |
| "%qE attribute applies only to functions", name); |
| *no_add_attrs = true; |
| } |
| else |
| DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl) = 1; |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "no_profile_instrument_function" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_no_profile_instrument_function_attribute (tree *node, tree name, tree, |
| int, bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "malloc" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_malloc_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL |
| && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (*node)))) |
| DECL_IS_MALLOC (*node) = 1; |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "alloc_size" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_alloc_size_attribute (tree *node, tree ARG_UNUSED (name), tree args, |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| unsigned arg_count = type_num_arguments (*node); |
| for (; args; args = TREE_CHAIN (args)) |
| { |
| tree position = TREE_VALUE (args); |
| if (position && TREE_CODE (position) != IDENTIFIER_NODE |
| && TREE_CODE (position) != FUNCTION_DECL) |
| position = default_conversion (position); |
| |
| if (!tree_fits_uhwi_p (position) |
| || !arg_count |
| || !IN_RANGE (tree_to_uhwi (position), 1, arg_count)) |
| { |
| warning (OPT_Wattributes, |
| "alloc_size parameter outside range"); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| } |
| return NULL_TREE; |
| } |
| |
| /* Handle a "alloc_align" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_alloc_align_attribute (tree *node, tree, tree args, int, |
| bool *no_add_attrs) |
| { |
| unsigned arg_count = type_num_arguments (*node); |
| tree position = TREE_VALUE (args); |
| if (position && TREE_CODE (position) != IDENTIFIER_NODE |
| && TREE_CODE (position) != FUNCTION_DECL) |
| position = default_conversion (position); |
| |
| if (!tree_fits_uhwi_p (position) |
| || !arg_count |
| || !IN_RANGE (tree_to_uhwi (position), 1, arg_count)) |
| { |
| warning (OPT_Wattributes, |
| "alloc_align parameter outside range"); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| return NULL_TREE; |
| } |
| |
| /* Handle a "assume_aligned" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_assume_aligned_attribute (tree *, tree, tree args, int, |
| bool *no_add_attrs) |
| { |
| for (; args; args = TREE_CHAIN (args)) |
| { |
| tree position = TREE_VALUE (args); |
| if (position && TREE_CODE (position) != IDENTIFIER_NODE |
| && TREE_CODE (position) != FUNCTION_DECL) |
| position = default_conversion (position); |
| |
| if (TREE_CODE (position) != INTEGER_CST) |
| { |
| warning (OPT_Wattributes, |
| "assume_aligned parameter not integer constant"); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| } |
| return NULL_TREE; |
| } |
| |
| /* Handle a "fn spec" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_fnspec_attribute (tree *node ATTRIBUTE_UNUSED, tree ARG_UNUSED (name), |
| tree args, int ARG_UNUSED (flags), |
| bool *no_add_attrs ATTRIBUTE_UNUSED) |
| { |
| gcc_assert (args |
| && TREE_CODE (TREE_VALUE (args)) == STRING_CST |
| && !TREE_CHAIN (args)); |
| return NULL_TREE; |
| } |
| |
| /* Handle a "bnd_variable_size" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_bnd_variable_size_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) != FIELD_DECL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "bnd_legacy" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_bnd_legacy (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "bnd_instrument" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_bnd_instrument (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "warn_unused" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_warn_unused_attribute (tree *node, tree name, |
| tree args ATTRIBUTE_UNUSED, |
| int flags ATTRIBUTE_UNUSED, bool *no_add_attrs) |
| { |
| if (TYPE_P (*node)) |
| /* Do nothing else, just set the attribute. We'll get at |
| it later with lookup_attribute. */ |
| ; |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle an "omp declare simd" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_omp_declare_simd_attribute (tree *, tree, tree, int, bool *) |
| { |
| return NULL_TREE; |
| } |
| |
| /* Handle a "simd" attribute. */ |
| |
| static tree |
| handle_simd_attribute (tree *node, tree name, tree args, int, bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL) |
| { |
| if (lookup_attribute ("cilk simd function", |
| DECL_ATTRIBUTES (*node)) != NULL) |
| { |
| error_at (DECL_SOURCE_LOCATION (*node), |
| "%<__simd__%> attribute cannot be used in the same " |
| "function marked as a Cilk Plus SIMD-enabled function"); |
| *no_add_attrs = true; |
| } |
| else |
| { |
| tree t = get_identifier ("omp declare simd"); |
| tree attr = NULL_TREE; |
| if (args) |
| { |
| tree id = TREE_VALUE (args); |
| |
| if (TREE_CODE (id) != STRING_CST) |
| { |
| error ("attribute %qE argument not a string", name); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| if (strcmp (TREE_STRING_POINTER (id), "notinbranch") == 0) |
| attr = build_omp_clause (DECL_SOURCE_LOCATION (*node), |
| OMP_CLAUSE_NOTINBRANCH); |
| else |
| if (strcmp (TREE_STRING_POINTER (id), "inbranch") == 0) |
| attr = build_omp_clause (DECL_SOURCE_LOCATION (*node), |
| OMP_CLAUSE_INBRANCH); |
| else |
| { |
| error ("only %<inbranch%> and %<notinbranch%> flags are " |
| "allowed for %<__simd__%> attribute"); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| } |
| |
| DECL_ATTRIBUTES (*node) = tree_cons (t, |
| build_tree_list (NULL_TREE, |
| attr), |
| DECL_ATTRIBUTES (*node)); |
| } |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle an "omp declare target" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_omp_declare_target_attribute (tree *, tree, tree, int, bool *) |
| { |
| return NULL_TREE; |
| } |
| |
| /* Handle a "returns_twice" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_returns_twice_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL) |
| DECL_IS_RETURNS_TWICE (*node) = 1; |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "no_limit_stack" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_no_limit_stack_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), |
| bool *no_add_attrs) |
| { |
| tree decl = *node; |
| |
| if (TREE_CODE (decl) != FUNCTION_DECL) |
| { |
| error_at (DECL_SOURCE_LOCATION (decl), |
| "%qE attribute applies only to functions", name); |
| *no_add_attrs = true; |
| } |
| else if (DECL_INITIAL (decl)) |
| { |
| error_at (DECL_SOURCE_LOCATION (decl), |
| "can%'t set %qE attribute after definition", name); |
| *no_add_attrs = true; |
| } |
| else |
| DECL_NO_LIMIT_STACK (decl) = 1; |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "pure" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_pure_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL) |
| DECL_PURE_P (*node) = 1; |
| /* ??? TODO: Support types. */ |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Digest an attribute list destined for a transactional memory statement. |
| ALLOWED is the set of attributes that are allowed for this statement; |
| return the attribute we parsed. Multiple attributes are never allowed. */ |
| |
| int |
| parse_tm_stmt_attr (tree attrs, int allowed) |
| { |
| tree a_seen = NULL; |
| int m_seen = 0; |
| |
| for ( ; attrs ; attrs = TREE_CHAIN (attrs)) |
| { |
| tree a = TREE_PURPOSE (attrs); |
| int m = 0; |
| |
| if (is_attribute_p ("outer", a)) |
| m = TM_STMT_ATTR_OUTER; |
| |
| if ((m & allowed) == 0) |
| { |
| warning (OPT_Wattributes, "%qE attribute directive ignored", a); |
| continue; |
| } |
| |
| if (m_seen == 0) |
| { |
| a_seen = a; |
| m_seen = m; |
| } |
| else if (m_seen == m) |
| warning (OPT_Wattributes, "%qE attribute duplicated", a); |
| else |
| warning (OPT_Wattributes, "%qE attribute follows %qE", a, a_seen); |
| } |
| |
| return m_seen; |
| } |
| |
| /* Transform a TM attribute name into a maskable integer and back. |
| Note that NULL (i.e. no attribute) is mapped to UNKNOWN, corresponding |
| to how the lack of an attribute is treated. */ |
| |
| int |
| tm_attr_to_mask (tree attr) |
| { |
| if (attr == NULL) |
| return 0; |
| if (is_attribute_p ("transaction_safe", attr)) |
| return TM_ATTR_SAFE; |
| if (is_attribute_p ("transaction_callable", attr)) |
| return TM_ATTR_CALLABLE; |
| if (is_attribute_p ("transaction_pure", attr)) |
| return TM_ATTR_PURE; |
| if (is_attribute_p ("transaction_unsafe", attr)) |
| return TM_ATTR_IRREVOCABLE; |
| if (is_attribute_p ("transaction_may_cancel_outer", attr)) |
| return TM_ATTR_MAY_CANCEL_OUTER; |
| return 0; |
| } |
| |
| tree |
| tm_mask_to_attr (int mask) |
| { |
| const char *str; |
| switch (mask) |
| { |
| case TM_ATTR_SAFE: |
| str = "transaction_safe"; |
| break; |
| case TM_ATTR_CALLABLE: |
| str = "transaction_callable"; |
| break; |
| case TM_ATTR_PURE: |
| str = "transaction_pure"; |
| break; |
| case TM_ATTR_IRREVOCABLE: |
| str = "transaction_unsafe"; |
| break; |
| case TM_ATTR_MAY_CANCEL_OUTER: |
| str = "transaction_may_cancel_outer"; |
| break; |
| default: |
| gcc_unreachable (); |
| } |
| return get_identifier (str); |
| } |
| |
| /* Return the first TM attribute seen in LIST. */ |
| |
| tree |
| find_tm_attribute (tree list) |
| { |
| for (; list ; list = TREE_CHAIN (list)) |
| { |
| tree name = TREE_PURPOSE (list); |
| if (tm_attr_to_mask (name) != 0) |
| return name; |
| } |
| return NULL_TREE; |
| } |
| |
| /* Handle the TM attributes; arguments as in struct attribute_spec.handler. |
| Here we accept only function types, and verify that none of the other |
| function TM attributes are also applied. */ |
| /* ??? We need to accept class types for C++, but not C. This greatly |
| complicates this function, since we can no longer rely on the extra |
| processing given by function_type_required. */ |
| |
| static tree |
| handle_tm_attribute (tree *node, tree name, tree args, |
| int flags, bool *no_add_attrs) |
| { |
| /* Only one path adds the attribute; others don't. */ |
| *no_add_attrs = true; |
| |
| switch (TREE_CODE (*node)) |
| { |
| case RECORD_TYPE: |
| case UNION_TYPE: |
| /* Only tm_callable and tm_safe apply to classes. */ |
| if (tm_attr_to_mask (name) & ~(TM_ATTR_SAFE | TM_ATTR_CALLABLE)) |
| goto ignored; |
| /* FALLTHRU */ |
| |
| case FUNCTION_TYPE: |
| case METHOD_TYPE: |
| { |
| tree old_name = find_tm_attribute (TYPE_ATTRIBUTES (*node)); |
| if (old_name == name) |
| ; |
| else if (old_name != NULL_TREE) |
| error ("type was previously declared %qE", old_name); |
| else |
| *no_add_attrs = false; |
| } |
| break; |
| |
| case FUNCTION_DECL: |
| { |
| /* transaction_safe_dynamic goes on the FUNCTION_DECL, but we also |
| want to set transaction_safe on the type. */ |
| gcc_assert (is_attribute_p ("transaction_safe_dynamic", name)); |
| if (!TYPE_P (DECL_CONTEXT (*node))) |
| error_at (DECL_SOURCE_LOCATION (*node), |
| "%<transaction_safe_dynamic%> may only be specified for " |
| "a virtual function"); |
| *no_add_attrs = false; |
| decl_attributes (&TREE_TYPE (*node), |
| build_tree_list (get_identifier ("transaction_safe"), |
| NULL_TREE), |
| 0); |
| break; |
| } |
| |
| case POINTER_TYPE: |
| { |
| enum tree_code subcode = TREE_CODE (TREE_TYPE (*node)); |
| if (subcode == FUNCTION_TYPE || subcode == METHOD_TYPE) |
| { |
| tree fn_tmp = TREE_TYPE (*node); |
| decl_attributes (&fn_tmp, tree_cons (name, args, NULL), 0); |
| *node = build_pointer_type (fn_tmp); |
| break; |
| } |
| } |
| /* FALLTHRU */ |
| |
| default: |
| /* If a function is next, pass it on to be tried next. */ |
| if (flags & (int) ATTR_FLAG_FUNCTION_NEXT) |
| return tree_cons (name, args, NULL); |
| |
| ignored: |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| break; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle the TM_WRAP attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_tm_wrap_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| tree decl = *node; |
| |
| /* We don't need the attribute even on success, since we |
| record the entry in an external table. */ |
| *no_add_attrs = true; |
| |
| if (TREE_CODE (decl) != FUNCTION_DECL) |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| else |
| { |
| tree wrap_decl = TREE_VALUE (args); |
| if (error_operand_p (wrap_decl)) |
| ; |
| else if (TREE_CODE (wrap_decl) != IDENTIFIER_NODE |
| && !VAR_OR_FUNCTION_DECL_P (wrap_decl)) |
| error ("%qE argument not an identifier", name); |
| else |
| { |
| if (TREE_CODE (wrap_decl) == IDENTIFIER_NODE) |
| wrap_decl = lookup_name (wrap_decl); |
| if (wrap_decl && TREE_CODE (wrap_decl) == FUNCTION_DECL) |
| { |
| if (lang_hooks.types_compatible_p (TREE_TYPE (decl), |
| TREE_TYPE (wrap_decl))) |
| record_tm_replacement (wrap_decl, decl); |
| else |
| error ("%qD is not compatible with %qD", wrap_decl, decl); |
| } |
| else |
| error ("%qE argument is not a function", name); |
| } |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Ignore the given attribute. Used when this attribute may be usefully |
| overridden by the target, but is not used generically. */ |
| |
| static tree |
| ignore_attribute (tree * ARG_UNUSED (node), tree ARG_UNUSED (name), |
| tree ARG_UNUSED (args), int ARG_UNUSED (flags), |
| bool *no_add_attrs) |
| { |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| /* Handle a "no vops" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_novops_attribute (tree *node, tree ARG_UNUSED (name), |
| tree ARG_UNUSED (args), int ARG_UNUSED (flags), |
| bool *ARG_UNUSED (no_add_attrs)) |
| { |
| gcc_assert (TREE_CODE (*node) == FUNCTION_DECL); |
| DECL_IS_NOVOPS (*node) = 1; |
| return NULL_TREE; |
| } |
| |
| /* Handle a "deprecated" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_deprecated_attribute (tree *node, tree name, |
| tree args, int flags, |
| bool *no_add_attrs) |
| { |
| tree type = NULL_TREE; |
| int warn = 0; |
| tree what = NULL_TREE; |
| |
| if (!args) |
| *no_add_attrs = true; |
| else if (TREE_CODE (TREE_VALUE (args)) != STRING_CST) |
| { |
| error ("deprecated message is not a string"); |
| *no_add_attrs = true; |
| } |
| |
| if (DECL_P (*node)) |
| { |
| tree decl = *node; |
| type = TREE_TYPE (decl); |
| |
| if (TREE_CODE (decl) == TYPE_DECL |
| || TREE_CODE (decl) == PARM_DECL |
| || VAR_OR_FUNCTION_DECL_P (decl) |
| || TREE_CODE (decl) == FIELD_DECL |
| || TREE_CODE (decl) == CONST_DECL |
| || objc_method_decl (TREE_CODE (decl))) |
| TREE_DEPRECATED (decl) = 1; |
| else |
| warn = 1; |
| } |
| else if (TYPE_P (*node)) |
| { |
| if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
| *node = build_variant_type_copy (*node); |
| TREE_DEPRECATED (*node) = 1; |
| type = *node; |
| } |
| else |
| warn = 1; |
| |
| if (warn) |
| { |
| *no_add_attrs = true; |
| if (type && TYPE_NAME (type)) |
| { |
| if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) |
| what = TYPE_NAME (*node); |
| else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
| && DECL_NAME (TYPE_NAME (type))) |
| what = DECL_NAME (TYPE_NAME (type)); |
| } |
| if (what) |
| warning (OPT_Wattributes, "%qE attribute ignored for %qE", name, what); |
| else |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "vector_size" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_vector_size_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), |
| bool *no_add_attrs) |
| { |
| unsigned HOST_WIDE_INT vecsize, nunits; |
| machine_mode orig_mode; |
| tree type = *node, new_type, size; |
| |
| *no_add_attrs = true; |
| |
| size = TREE_VALUE (args); |
| if (size && TREE_CODE (size) != IDENTIFIER_NODE |
| && TREE_CODE (size) != FUNCTION_DECL) |
| size = default_conversion (size); |
| |
| if (!tree_fits_uhwi_p (size)) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| return NULL_TREE; |
| } |
| |
| /* Get the vector size (in bytes). */ |
| vecsize = tree_to_uhwi (size); |
| |
| /* We need to provide for vector pointers, vector arrays, and |
| functions returning vectors. For example: |
| |
| __attribute__((vector_size(16))) short *foo; |
| |
| In this case, the mode is SI, but the type being modified is |
| HI, so we need to look further. */ |
| |
| while (POINTER_TYPE_P (type) |
| || TREE_CODE (type) == FUNCTION_TYPE |
| || TREE_CODE (type) == METHOD_TYPE |
| || TREE_CODE (type) == ARRAY_TYPE |
| || TREE_CODE (type) == OFFSET_TYPE) |
| type = TREE_TYPE (type); |
| |
| /* Get the mode of the type being modified. */ |
| orig_mode = TYPE_MODE (type); |
| |
| if ((!INTEGRAL_TYPE_P (type) |
| && !SCALAR_FLOAT_TYPE_P (type) |
| && !FIXED_POINT_TYPE_P (type)) |
| || (!SCALAR_FLOAT_MODE_P (orig_mode) |
| && GET_MODE_CLASS (orig_mode) != MODE_INT |
| && !ALL_SCALAR_FIXED_POINT_MODE_P (orig_mode)) |
| || !tree_fits_uhwi_p (TYPE_SIZE_UNIT (type)) |
| || TREE_CODE (type) == BOOLEAN_TYPE) |
| { |
| error ("invalid vector type for attribute %qE", name); |
| return NULL_TREE; |
| } |
| |
| if (vecsize % tree_to_uhwi (TYPE_SIZE_UNIT (type))) |
| { |
| error ("vector size not an integral multiple of component size"); |
| return NULL; |
| } |
| |
| if (vecsize == 0) |
| { |
| error ("zero vector size"); |
| return NULL; |
| } |
| |
| /* Calculate how many units fit in the vector. */ |
| nunits = vecsize / tree_to_uhwi (TYPE_SIZE_UNIT (type)); |
| if (nunits & (nunits - 1)) |
| { |
| error ("number of components of the vector not a power of two"); |
| return NULL_TREE; |
| } |
| |
| new_type = build_vector_type (type, nunits); |
| |
| /* Build back pointers if needed. */ |
| *node = lang_hooks.types.reconstruct_complex_type (*node, new_type); |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle the "nonnull" attribute. */ |
| |
| static tree |
| handle_nonnull_attribute (tree *node, tree ARG_UNUSED (name), |
| tree args, int ARG_UNUSED (flags), |
| bool *no_add_attrs) |
| { |
| tree type = *node; |
| unsigned HOST_WIDE_INT attr_arg_num; |
| |
| /* If no arguments are specified, all pointer arguments should be |
| non-null. Verify a full prototype is given so that the arguments |
| will have the correct types when we actually check them later. |
| Avoid diagnosing type-generic built-ins since those have no |
| prototype. */ |
| if (!args) |
| { |
| if (!prototype_p (type) |
| && (!TYPE_ATTRIBUTES (type) |
| || !lookup_attribute ("type generic", TYPE_ATTRIBUTES (type)))) |
| { |
| error ("nonnull attribute without arguments on a non-prototype"); |
| *no_add_attrs = true; |
| } |
| return NULL_TREE; |
| } |
| |
| /* Argument list specified. Verify that each argument number references |
| a pointer argument. */ |
| for (attr_arg_num = 1; args; attr_arg_num++, args = TREE_CHAIN (args)) |
| { |
| unsigned HOST_WIDE_INT arg_num = 0, ck_num; |
| |
| tree arg = TREE_VALUE (args); |
| if (arg && TREE_CODE (arg) != IDENTIFIER_NODE |
| && TREE_CODE (arg) != FUNCTION_DECL) |
| TREE_VALUE (args) = arg = default_conversion (arg); |
| |
| if (!get_nonnull_operand (arg, &arg_num)) |
| { |
| error ("nonnull argument has invalid operand number (argument %lu)", |
| (unsigned long) attr_arg_num); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| if (prototype_p (type)) |
| { |
| function_args_iterator iter; |
| tree argument; |
| |
| function_args_iter_init (&iter, type); |
| for (ck_num = 1; ; ck_num++, function_args_iter_next (&iter)) |
| { |
| argument = function_args_iter_cond (&iter); |
| if (argument == NULL_TREE || ck_num == arg_num) |
| break; |
| } |
| |
| if (!argument |
| || TREE_CODE (argument) == VOID_TYPE) |
| { |
| error ("nonnull argument with out-of-range operand number " |
| "(argument %lu, operand %lu)", |
| (unsigned long) attr_arg_num, (unsigned long) arg_num); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| if (TREE_CODE (argument) != POINTER_TYPE) |
| { |
| error ("nonnull argument references non-pointer operand " |
| "(argument %lu, operand %lu)", |
| (unsigned long) attr_arg_num, (unsigned long) arg_num); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| } |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle the "nonstring" variable attribute. */ |
| |
| static tree |
| handle_nonstring_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| gcc_assert (!args); |
| tree_code code = TREE_CODE (*node); |
| |
| if (VAR_P (*node) |
| || code == FIELD_DECL |
| || code == PARM_DECL) |
| { |
| tree type = TREE_TYPE (*node); |
| |
| if (POINTER_TYPE_P (type) || TREE_CODE (type) == ARRAY_TYPE) |
| { |
| tree eltype = TREE_TYPE (type); |
| if (eltype == char_type_node) |
| return NULL_TREE; |
| } |
| |
| warning (OPT_Wattributes, |
| "%qE attribute ignored on objects of type %qT", |
| name, type); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| if (code == FUNCTION_DECL) |
| warning (OPT_Wattributes, |
| "%qE attribute does not apply to functions", name); |
| else if (code == TYPE_DECL) |
| warning (OPT_Wattributes, |
| "%qE attribute does not apply to types", name); |
| else |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| /* Handle a "nothrow" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_nothrow_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) == FUNCTION_DECL) |
| TREE_NOTHROW (*node) = 1; |
| /* ??? TODO: Support types. */ |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "cleanup" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_cleanup_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| tree decl = *node; |
| tree cleanup_id, cleanup_decl; |
| |
| /* ??? Could perhaps support cleanups on TREE_STATIC, much like we do |
| for global destructors in C++. This requires infrastructure that |
| we don't have generically at the moment. It's also not a feature |
| we'd be missing too much, since we do have attribute constructor. */ |
| if (!VAR_P (decl) || TREE_STATIC (decl)) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| /* Verify that the argument is a function in scope. */ |
| /* ??? We could support pointers to functions here as well, if |
| that was considered desirable. */ |
| cleanup_id = TREE_VALUE (args); |
| if (TREE_CODE (cleanup_id) != IDENTIFIER_NODE) |
| { |
| error ("cleanup argument not an identifier"); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| cleanup_decl = lookup_name (cleanup_id); |
| if (!cleanup_decl || TREE_CODE (cleanup_decl) != FUNCTION_DECL) |
| { |
| error ("cleanup argument not a function"); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| /* That the function has proper type is checked with the |
| eventual call to build_function_call. */ |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "warn_unused_result" attribute. No special handling. */ |
| |
| static tree |
| handle_warn_unused_result_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| /* Ignore the attribute for functions not returning any value. */ |
| if (VOID_TYPE_P (TREE_TYPE (*node))) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "sentinel" attribute. */ |
| |
| static tree |
| handle_sentinel_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| if (!prototype_p (*node)) |
| { |
| warning (OPT_Wattributes, |
| "%qE attribute requires prototypes with named arguments", name); |
| *no_add_attrs = true; |
| } |
| else |
| { |
| if (!stdarg_p (*node)) |
| { |
| warning (OPT_Wattributes, |
| "%qE attribute only applies to variadic functions", name); |
| *no_add_attrs = true; |
| } |
| } |
| |
| if (args) |
| { |
| tree position = TREE_VALUE (args); |
| if (position && TREE_CODE (position) != IDENTIFIER_NODE |
| && TREE_CODE (position) != FUNCTION_DECL) |
| position = default_conversion (position); |
| |
| if (TREE_CODE (position) != INTEGER_CST |
| || !INTEGRAL_TYPE_P (TREE_TYPE (position))) |
| { |
| warning (OPT_Wattributes, |
| "requested position is not an integer constant"); |
| *no_add_attrs = true; |
| } |
| else |
| { |
| if (tree_int_cst_lt (position, integer_zero_node)) |
| { |
| warning (OPT_Wattributes, |
| "requested position is less than zero"); |
| *no_add_attrs = true; |
| } |
| } |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "type_generic" attribute. */ |
| |
| static tree |
| handle_type_generic_attribute (tree *node, tree ARG_UNUSED (name), |
| tree ARG_UNUSED (args), int ARG_UNUSED (flags), |
| bool * ARG_UNUSED (no_add_attrs)) |
| { |
| /* Ensure we have a function type. */ |
| gcc_assert (TREE_CODE (*node) == FUNCTION_TYPE); |
| |
| /* Ensure we have a variadic function. */ |
| gcc_assert (!prototype_p (*node) || stdarg_p (*node)); |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "target" attribute. */ |
| |
| static tree |
| handle_target_attribute (tree *node, tree name, tree args, int flags, |
| bool *no_add_attrs) |
| { |
| /* Ensure we have a function type. */ |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| else if (lookup_attribute ("target_clones", DECL_ATTRIBUTES (*node))) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
| "with %qs attribute", name, "target_clones"); |
| *no_add_attrs = true; |
| } |
| else if (! targetm.target_option.valid_attribute_p (*node, name, args, |
| flags)) |
| *no_add_attrs = true; |
| |
| /* Check that there's no empty string in values of the attribute. */ |
| for (tree t = args; t != NULL_TREE; t = TREE_CHAIN (t)) |
| { |
| tree value = TREE_VALUE (t); |
| if (TREE_CODE (value) == STRING_CST |
| && TREE_STRING_LENGTH (value) == 1 |
| && TREE_STRING_POINTER (value)[0] == '\0') |
| { |
| warning (OPT_Wattributes, "empty string in attribute %<target%>"); |
| *no_add_attrs = true; |
| } |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "target_clones" attribute. */ |
| |
| static tree |
| handle_target_clones_attribute (tree *node, tree name, tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| /* Ensure we have a function type. */ |
| if (TREE_CODE (*node) == FUNCTION_DECL) |
| { |
| if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (*node))) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
| "with %qs attribute", name, "always_inline"); |
| *no_add_attrs = true; |
| } |
| else if (lookup_attribute ("target", DECL_ATTRIBUTES (*node))) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored due to conflict " |
| "with %qs attribute", name, "target"); |
| *no_add_attrs = true; |
| } |
| else |
| /* Do not inline functions with multiple clone targets. */ |
| DECL_UNINLINABLE (*node) = 1; |
| } |
| else |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| return NULL_TREE; |
| } |
| |
| /* For handling "optimize" attribute. arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_optimize_attribute (tree *node, tree name, tree args, |
| int ARG_UNUSED (flags), bool *no_add_attrs) |
| { |
| /* Ensure we have a function type. */ |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| } |
| else |
| { |
| struct cl_optimization cur_opts; |
| tree old_opts = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node); |
| |
| /* Save current options. */ |
| cl_optimization_save (&cur_opts, &global_options); |
| |
| /* If we previously had some optimization options, use them as the |
| default. */ |
| if (old_opts) |
| cl_optimization_restore (&global_options, |
| TREE_OPTIMIZATION (old_opts)); |
| |
| /* Parse options, and update the vector. */ |
| parse_optimize_options (args, true); |
| DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node) |
| = build_optimization_node (&global_options); |
| |
| /* Restore current options. */ |
| cl_optimization_restore (&global_options, &cur_opts); |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "no_split_stack" attribute. */ |
| |
| static tree |
| handle_no_split_stack_attribute (tree *node, tree name, |
| tree ARG_UNUSED (args), |
| int ARG_UNUSED (flags), |
| bool *no_add_attrs) |
| { |
| tree decl = *node; |
| |
| if (TREE_CODE (decl) != FUNCTION_DECL) |
| { |
| error_at (DECL_SOURCE_LOCATION (decl), |
| "%qE attribute applies only to functions", name); |
| *no_add_attrs = true; |
| } |
| else if (DECL_INITIAL (decl)) |
| { |
| error_at (DECL_SOURCE_LOCATION (decl), |
| "can%'t set %qE attribute after definition", name); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle a "returns_nonnull" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_returns_nonnull_attribute (tree *node, tree, tree, int, |
| bool *no_add_attrs) |
| { |
| // Even without a prototype we still have a return type we can check. |
| if (TREE_CODE (TREE_TYPE (*node)) != POINTER_TYPE) |
| { |
| error ("returns_nonnull attribute on a function not returning a pointer"); |
| *no_add_attrs = true; |
| } |
| return NULL_TREE; |
| } |
| |
| /* Handle a "designated_init" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| |
| static tree |
| handle_designated_init_attribute (tree *node, tree name, tree, int, |
| bool *no_add_attrs) |
| { |
| if (TREE_CODE (*node) != RECORD_TYPE) |
| { |
| error ("%qE attribute is only valid on %<struct%> type", name); |
| *no_add_attrs = true; |
| } |
| return NULL_TREE; |
| } |
| |
| |
| /* Handle a "fallthrough" attribute; arguments as in struct |
| attribute_spec.handler. */ |
| |
| static tree |
| handle_fallthrough_attribute (tree *, tree name, tree, int, |
| bool *no_add_attrs) |
| { |
| warning (OPT_Wattributes, "%qE attribute ignored", name); |
| *no_add_attrs = true; |
| return NULL_TREE; |
| } |
| |
| static tree |
| handle_patchable_function_entry_attribute (tree *, tree, tree, int, bool *) |
| { |
| /* Nothing to be done here. */ |
| return NULL_TREE; |
| } |