From d5c6604f42034e36b149f899c5ddb93025a645b4 Mon Sep 17 00:00:00 2001 From: Richard Sandiford Date: Tue, 2 Nov 2021 10:51:23 +0000 Subject: Add a simulate_record_decl lang hook MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch adds a lang hook for defining a struct/RECORD_TYPE “as if” it had appeared directly in the source code. It follows the similar existing hook for enums. It's the caller's responsibility to create the fields (as FIELD_DECLs) but the hook's responsibility to create and declare the associated RECORD_TYPE. For now the hook is hard-coded to do the equivalent of: typedef struct NAME { FIELDS } NAME; but this could be controlled by an extra parameter if some callers want a different behaviour in future. The motivating use case is to allow the long list of struct definitions in arm_neon.h to be provided by the compiler, which in turn unblocks various arm_neon.h optimisations. gcc/ * langhooks.h (lang_hooks_for_types::simulate_record_decl): New hook. * langhooks-def.h (lhd_simulate_record_decl): Declare. (LANG_HOOKS_SIMULATE_RECORD_DECL): Define. (LANG_HOOKS_FOR_TYPES_INITIALIZER): Include it. * langhooks.c (lhd_simulate_record_decl): New function. gcc/c/ * c-tree.h (c_simulate_record_decl): Declare. * c-objc-common.h (LANG_HOOKS_SIMULATE_RECORD_DECL): Override. * c-decl.c (c_simulate_record_decl): New function. gcc/cp/ * decl.c: Include langhooks-def.h. (cxx_simulate_record_decl): New function. * cp-objcp-common.h (cxx_simulate_record_decl): Declare. (LANG_HOOKS_SIMULATE_RECORD_DECL): Override. --- gcc/c/c-tree.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'gcc/c/c-tree.h') diff --git a/gcc/c/c-tree.h b/gcc/c/c-tree.h index a046c6b..f1dbbd5 100644 --- a/gcc/c/c-tree.h +++ b/gcc/c/c-tree.h @@ -598,6 +598,8 @@ extern tree finish_struct (location_t, tree, tree, tree, class c_struct_parse_info *); extern tree c_simulate_enum_decl (location_t, const char *, vec *); +extern tree c_simulate_record_decl (location_t, const char *, + array_slice); extern struct c_arg_info *build_arg_info (void); extern struct c_arg_info *get_parm_info (bool, tree); extern tree grokfield (location_t, struct c_declarator *, -- cgit v1.1