From 23686f390434377a207da92b95336414e9f49a14 Mon Sep 17 00:00:00 2001
From: marxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 28 Jun 2017 12:47:24 +0000
Subject: [PATCH 1/7] Backport r249735
gcc/ChangeLog:
2017-06-28 Martin Liska <mliska@suse.cz>
PR ipa/81128
* ipa-visibility.c (non_local_p): Handle visibility.
gcc/c-family/ChangeLog:
2017-06-28 Martin Liska <mliska@suse.cz>
PR ipa/81128
* c-attribs.c (handle_alias_ifunc_attribute): Append ifunc alias
to a function declaration.
gcc/testsuite/ChangeLog:
2017-06-28 Martin Liska <mliska@suse.cz>
PR ipa/81128
* gcc.target/i386/pr81128.c: New test.
---
gcc/c-family/c-attribs.c | 3180 +++++++++++++++++++++++++++++++
gcc/ipa-visibility.c | 3 +-
gcc/testsuite/gcc.target/i386/pr81128.c | 65 +
3 files changed, 3247 insertions(+), 1 deletion(-)
create mode 100644 gcc/c-family/c-attribs.c
create mode 100644 gcc/testsuite/gcc.target/i386/pr81128.c
new file mode 100644
@@ -0,0 +1,3180 @@
+/* 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_address_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_noicf_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_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_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 *);
+
+/* 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 },
+ { "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 },
+ { "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 },
+ { "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_address", 0, 0, true, false, false,
+ handle_no_sanitize_address_attribute,
+ false },
+ { "no_sanitize_thread", 0, 0, true, false, false,
+ handle_no_sanitize_address_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 },
+ { 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_INITIAL (*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;
+}
+
+/* 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)
+{
+ if (TREE_CODE (*node) != FUNCTION_DECL)
+ {
+ warning (OPT_Wattributes, "%qE attribute ignored", name);
+ *no_add_attrs = true;
+ }
+
+ 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)
+{
+ if (TREE_CODE (*node) != FUNCTION_DECL)
+ warning (OPT_Wattributes, "%qE attribute ignored", name);
+ else if (!lookup_attribute ("no_sanitize_address", DECL_ATTRIBUTES (*node)))
+ DECL_ATTRIBUTES (*node)
+ = tree_cons (get_identifier ("no_sanitize_address"),
+ NULL_TREE, DECL_ATTRIBUTES (*node));
+ *no_add_attrs = true;
+ 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)
+{
+ if (TREE_CODE (*node) != FUNCTION_DECL)
+ {
+ warning (OPT_Wattributes, "%qE attribute ignored", name);
+ *no_add_attrs = true;
+ }
+
+ 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;
+ }
+ else
+ DECL_ATTRIBUTES (*node)
+ = tree_cons (get_identifier ("stack_protect"),
+ NULL_TREE, DECL_ATTRIBUTES (*node));
+
+ 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 "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);
+ machine_mode innermode;
+
+ /* 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;
+
+ innermode = GET_MODE_INNER (mode);
+
+ /* 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 (innermode);
+}
+
+
+/* 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 (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))
+ {
+ addr_space_t as = TYPE_ADDR_SPACE (TREE_TYPE (type));
+ tree (*fn)(tree, machine_mode, bool);
+
+ if (!targetm.addr_space.valid_pointer_mode (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), 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;
+}
+
+/* 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)
+{
+ 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);
+
+ 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 (TREE_CODE (decl) == FUNCTION_DECL
+ && DECL_ALIGN (decl) > (1U << i) * BITS_PER_UNIT)
+ {
+ 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
+ {
+ SET_DECL_ALIGN (decl, (1U << i) * BITS_PER_UNIT);
+ DECL_USER_ALIGN (decl) = 1;
+ }
+
+ return NULL_TREE;
+}
+
+/* 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 ("%+D declared alias after being used", decl);
+ else
+ error ("%+D 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 ("%+D 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 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;
+
+ 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;
+}
@@ -97,7 +97,8 @@ non_local_p (struct cgraph_node *node, void *data ATTRIBUTE_UNUSED)
&& !DECL_EXTERNAL (node->decl)
&& !node->externally_visible
&& !node->used_from_other_partition
- && !node->in_other_partition);
+ && !node->in_other_partition
+ && node->get_availability () >= AVAIL_AVAILABLE);
}
/* Return true when function can be marked local. */
new file mode 100644
@@ -0,0 +1,65 @@
+/* PR ipa/81128 */
+/* { dg-do run } */
+/* { dg-options "-O3" } */
+/* { dg-require-ifunc "" } */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+int resolver_fn = 0;
+int resolved_fn = 0;
+
+static inline void
+do_it_right_at_runtime_A ()
+{
+ resolved_fn++;
+}
+
+static inline void
+do_it_right_at_runtime_B ()
+{
+ resolved_fn++;
+}
+
+static inline void do_it_right_at_runtime (void);
+
+void do_it_right_at_runtime (void)
+ __attribute__ ((ifunc ("resolve_do_it_right_at_runtime")));
+
+static void (*resolve_do_it_right_at_runtime (void)) (void)
+{
+ srand (time (NULL));
+ int r = rand ();
+ resolver_fn++;
+
+ /* Use intermediate variable to get a warning for non-matching
+ * prototype. */
+ typeof(do_it_right_at_runtime) *func;
+ if (r & 1)
+ func = do_it_right_at_runtime_A;
+ else
+ func = do_it_right_at_runtime_B;
+
+ return (void *) func;
+}
+
+int
+main (void)
+{
+ const unsigned int ITERS = 10;
+
+ for (int i = ITERS; i > 0; i--)
+ {
+ do_it_right_at_runtime ();
+ }
+
+ if (resolver_fn != 1)
+ __builtin_abort ();
+
+ if (resolved_fn != 10)
+ __builtin_abort ();
+
+ return 0;
+}
--
2.14.1