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/cp/cp-objcp-common.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'gcc/cp/cp-objcp-common.h') diff --git a/gcc/cp/cp-objcp-common.h b/gcc/cp/cp-objcp-common.h index f1704aa..d585940 100644 --- a/gcc/cp/cp-objcp-common.h +++ b/gcc/cp/cp-objcp-common.h @@ -39,6 +39,8 @@ extern bool cp_handle_option (size_t, const char *, HOST_WIDE_INT, int, extern tree cxx_make_type_hook (tree_code); extern tree cxx_simulate_enum_decl (location_t, const char *, vec *); +extern tree cxx_simulate_record_decl (location_t, const char *, + array_slice); /* Lang hooks that are shared between C++ and ObjC++ are defined here. Hooks specific to C++ or ObjC++ go in cp/cp-lang.c and objcp/objcp-lang.c, @@ -139,6 +141,8 @@ extern tree cxx_simulate_enum_decl (location_t, const char *, #define LANG_HOOKS_MAKE_TYPE cxx_make_type_hook #undef LANG_HOOKS_SIMULATE_ENUM_DECL #define LANG_HOOKS_SIMULATE_ENUM_DECL cxx_simulate_enum_decl +#undef LANG_HOOKS_SIMULATE_RECORD_DECL +#define LANG_HOOKS_SIMULATE_RECORD_DECL cxx_simulate_record_decl #undef LANG_HOOKS_TYPE_FOR_MODE #define LANG_HOOKS_TYPE_FOR_MODE c_common_type_for_mode #undef LANG_HOOKS_TYPE_FOR_SIZE -- cgit v1.1