From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from fx403.security-mail.net (smtpout140.security-mail.net [85.31.212.143]) by sourceware.org (Postfix) with ESMTPS id C7D13389838B for ; Thu, 6 Oct 2022 14:13:46 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org C7D13389838B Authentication-Results: sourceware.org; dmarc=fail (p=quarantine dis=none) header.from=kalrayinc.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=kalray.eu Received: from localhost (localhost [127.0.0.1]) by fx403.security-mail.net (Postfix) with ESMTP id B507310E8CD for ; Thu, 6 Oct 2022 16:13:44 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kalrayinc.com; s=sec-sig-email; t=1665065624; bh=eIS9ori9UMbnFZf6tJIwkPukLa/2sU2bVGyMh+UyqYE=; h=Date:From:To:Cc:Subject; b=K9dtZxkOVluWDliuexa7dkjvXHb1x5JZ7iAQ/tQnSP9X6L3JnC2tf71MnjpyHsHT0 vtOHKtTrsd5sYRCq/k1WhdD089WpMuLE50jxy4Z/XUhzUg8rr539N5gorWCCfwkM/I M7J/6Bju/DAoTjPwkH9sAOCFVpOQ8S7y1stTHQxg= Received: from fx403 (localhost [127.0.0.1]) by fx403.security-mail.net (Postfix) with ESMTP id 43F4810E8B9; Thu, 6 Oct 2022 16:13:44 +0200 (CEST) Received: from zimbra2.kalray.eu (unknown [217.181.231.53]) by fx403.security-mail.net (Postfix) with ESMTPS id 69B6B10E830; Thu, 6 Oct 2022 16:13:41 +0200 (CEST) Received: from zimbra2.kalray.eu (localhost [127.0.0.1]) by zimbra2.kalray.eu (Postfix) with ESMTPS id 7C13727E0444; Thu, 6 Oct 2022 16:13:41 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by zimbra2.kalray.eu (Postfix) with ESMTP id 6413627E0445; Thu, 6 Oct 2022 16:13:41 +0200 (CEST) Received: from zimbra2.kalray.eu ([127.0.0.1]) by localhost (zimbra2.kalray.eu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id u14A7HxFT1JN; Thu, 6 Oct 2022 16:13:41 +0200 (CEST) Received: from localhost (unknown [192.168.37.51]) by zimbra2.kalray.eu (Postfix) with ESMTPSA id 48E2327E0444; Thu, 6 Oct 2022 16:13:41 +0200 (CEST) X-Virus-Scanned: E-securemail, by Secumail Secumail-id: DKIM-Filter: OpenDKIM Filter v2.10.3 zimbra2.kalray.eu 6413627E0445 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kalrayinc.com; s=4F334102-7B72-11EB-A74E-42D0B9747555; t=1665065621; bh=IKkla7wvniK589K2EsTE9g79TQldaLl+Hb/yyabGCec=; h=Date:From:To:Message-ID:MIME-Version; b=SmKJYLSL7c/M+mE3WKcZhFpFa1LTVbwI9yrPEMznjP0o078sl0GJdcJMdGTiKgorz Xzk7RLiyTSnhaJ7F/jK/KQbbs6CeRbpICd273HVhDiTDgm0iHMxXiRrUIs7yR2ooeL MhG09MncMCQ5GpS9t7+dE8ipewZ5WoYdAmAloehMVexcYtzR2Zq2KzRDpKAsHqz95w wC6yL3kb4Eall9ZyCnAiuRpBA7k1DVPhzSPJZpwgzCmLjD6OV+yld0Oo8zWBoQMzJp +ytk3uwKysALk8rfu8VadJZmNHKzf0iKtVshQ4PPY++uq6oqxmHXUP+gbtdPQPuQPn /XDTXkAOG6M7g== Date: Thu, 6 Oct 2022 16:13:26 +0200 From: Paul Iannetta To: gcc@gcc.gnu.org Cc: jason@redhat.com Subject: [RFC] c++: parser - Support for target address spaces in C++ Message-ID: <20221006141326.n75ctqeushu47phs@ws2202.lin.mbt.kalray.eu> MIME-Version: 1.0 Content-Disposition: inline User-Agent: NeoMutt/20171215 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-ALTERMIMEV2_out: done X-Spam-Status: No, score=-10.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,GIT_PATCH_0,HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: Hi, Presently, GCC supports target address spaces as a GNU extension (cf. `info -n "(gcc)Named Address Spaces"`). This is however supported only by the C frontend, which is a bit sad, since all the GIMPLE machinery is readily available and, moreover, LLVM supports this GNU extension both for C and C++. Here is a first attempt at a patch to enable the support for target address spaces in C++. The basic idea is only to make the parser recognize address spaces, and lower them into GIMPLE, in the same fashion as the C parser. This also makes it possible to merge the function `c_register_addr_space` in one place which is better than before. The patch still has some drawbacks compared to its C counterpart. Namely, much like the `__restrict__` keyword, it is always enabled and -std=c++11 won't disable it (whereas -std=c11) would reject address spaces. Not also that the mangler ignores address spaces, much like it ignores __restrict__. Depending on the reception, I'll add further testcases and will update the relevant part of the documentation. Cheers, Paul Author: Paul Iannetta Date: Wed Oct 5 16:44:36 2022 +0200 Add support for custom address spaces in C++ gcc/ * tree.h (ENCODE_QUAL_ADDR_SPACE): Missing parentheses. gcc/c/ * c-decl.c: Remove c_register_addr_space. gcc/c-family/ * c-common.c (c_register_addr_space): Imported from c-decl.c * c-common.h: Remove the FIXME. gcc/cp/ * cp-tree.h (enum cp_decl_spec): Add addr_space support. (struct cp_decl_specifier_seq): Likewise. * decl.c (get_type_quals): Likewise. * parser.c (cp_parser_type_specifier): Likewise. (cp_parser_cv_qualifier_seq_opt): Likewise * tree.c: Remove c_register_addr_space stub. diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c index 064c2f263f0..282ba54ab70 100644 --- a/gcc/c-family/c-common.c +++ b/gcc/c-family/c-common.c @@ -2615,6 +2615,25 @@ c_build_bitfield_integer_type (unsigned HOST_WIDE_INT width, int unsignedp) return build_nonstandard_integer_type (width, unsignedp); } +/* Register reserved keyword WORD as qualifier for address space AS. */ + +void +c_register_addr_space (const char *word, addr_space_t as) +{ + int rid = RID_FIRST_ADDR_SPACE + as; + tree id; + + /* Address space qualifiers are only supported + in C with GNU extensions enabled. */ + if (c_dialect_objc () || flag_no_asm) + return; + + id = get_identifier (word); + C_SET_RID_CODE (id, rid); + TREE_LANG_FLAG_0 (id) = 1; + ridpointers[rid] = id; +} + /* The C version of the register_builtin_type langhook. */ void diff --git a/gcc/c-family/c-common.h b/gcc/c-family/c-common.h index ed39b7764bf..f2c1df0c8de 100644 --- a/gcc/c-family/c-common.h +++ b/gcc/c-family/c-common.h @@ -808,9 +808,6 @@ extern const struct attribute_spec c_common_format_attribute_table[]; extern tree (*make_fname_decl) (location_t, tree, int); -/* In c-decl.c and cp/tree.c. FIXME. */ -extern void c_register_addr_space (const char *str, addr_space_t as); - /* In c-common.c. */ extern bool in_late_binary_op; extern const char *c_addr_space_name (addr_space_t as); @@ -926,6 +923,7 @@ extern void c_common_finish (void); extern void c_common_parse_file (void); extern FILE *get_dump_info (int, dump_flags_t *); extern alias_set_type c_common_get_alias_set (tree); +extern void c_register_addr_space (const char *, addr_space_t); extern void c_register_builtin_type (tree, const char*); extern bool c_promoting_integer_type_p (const_tree); extern bool self_promoting_args_p (const_tree); diff --git a/gcc/c/c-decl.c b/gcc/c/c-decl.c index 8e24b522ee4..278d1248d1c 100644 --- a/gcc/c/c-decl.c +++ b/gcc/c/c-decl.c @@ -11927,25 +11927,6 @@ c_parse_final_cleanups (void) ext_block = NULL; } -/* Register reserved keyword WORD as qualifier for address space AS. */ - -void -c_register_addr_space (const char *word, addr_space_t as) -{ - int rid = RID_FIRST_ADDR_SPACE + as; - tree id; - - /* Address space qualifiers are only supported - in C with GNU extensions enabled. */ - if (c_dialect_objc () || flag_no_asm) - return; - - id = get_identifier (word); - C_SET_RID_CODE (id, rid); - C_IS_RESERVED_WORD (id) = 1; - ridpointers [rid] = id; -} - /* Return identifier to look up for omp declare reduction. */ tree diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h index 15ec4cd199f..4ae971ccb90 100644 --- a/gcc/cp/cp-tree.h +++ b/gcc/cp/cp-tree.h @@ -5974,6 +5974,7 @@ enum cp_decl_spec { ds_const, ds_volatile, ds_restrict, + ds_addr_space, ds_inline, ds_virtual, ds_explicit, @@ -6046,6 +6047,8 @@ struct cp_decl_specifier_seq { /* True iff the alternate "__intN__" form of the __intN type has been used. */ BOOL_BITFIELD int_n_alt: 1; + /* The address space that the declaration belongs to. */ + addr_space_t address_space; }; /* The various kinds of declarators. */ diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c index 03cd0a3a238..b8fc8b58ac7 100644 --- a/gcc/cp/decl.c +++ b/gcc/cp/decl.c @@ -4954,6 +4954,8 @@ get_type_quals (const cp_decl_specifier_seq *declspecs) type_quals |= TYPE_QUAL_VOLATILE; if (decl_spec_seq_has_spec_p (declspecs, ds_restrict)) type_quals |= TYPE_QUAL_RESTRICT; + if (decl_spec_seq_has_spec_p (declspecs, ds_addr_space)) + type_quals |= ENCODE_QUAL_ADDR_SPACE (declspecs->address_space); return type_quals; } diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c index f48c856fa94..8d6b2a44086 100644 --- a/gcc/cp/parser.c +++ b/gcc/cp/parser.c @@ -17796,6 +17796,16 @@ cp_parser_type_specifier (cp_parser* parser, break; } + + if (RID_FIRST_ADDR_SPACE <= keyword && keyword <= RID_LAST_ADDR_SPACE) + { + ds = ds_addr_space; + if (is_cv_qualifier) + *is_cv_qualifier = true; + decl_specs->address_space = keyword - RID_FIRST_ADDR_SPACE; + } + + /* Handle simple keywords. */ if (ds != ds_last) { @@ -21853,6 +21863,7 @@ cp_parser_ptr_operator (cp_parser* parser, GNU Extension: cv-qualifier: + address-space-qualifier __restrict__ Returns a bitmask representing the cv-qualifiers. */ @@ -21889,6 +21900,13 @@ cp_parser_cv_qualifier_seq_opt (cp_parser* parser) break; } + if (RID_FIRST_ADDR_SPACE <= token->keyword && + token->keyword <= RID_LAST_ADDR_SPACE) + { + cv_qualifier = + ENCODE_QUAL_ADDR_SPACE (token->keyword - RID_FIRST_ADDR_SPACE); + } + if (!cv_qualifier) break; diff --git a/gcc/cp/tree.c b/gcc/cp/tree.c index 10b818d1370..55b57085618 100644 --- a/gcc/cp/tree.c +++ b/gcc/cp/tree.c @@ -5749,15 +5749,6 @@ cp_free_lang_data (tree t) DECL_CHAIN (t) = NULL_TREE; } -/* Stub for c-common. Please keep in sync with c-decl.c. - FIXME: If address space support is target specific, then this - should be a C target hook. But currently this is not possible, - because this function is called via REGISTER_TARGET_PRAGMAS. */ -void -c_register_addr_space (const char * /*word*/, addr_space_t /*as*/) -{ -} - /* Return the number of operands in T that we care about for things like mangling. */ diff --git a/gcc/tree.h b/gcc/tree.h index bb80e81d389..210ef7b85d7 100644 --- a/gcc/tree.h +++ b/gcc/tree.h @@ -2108,7 +2108,7 @@ extern machine_mode vector_type_mode (const_tree); /* Encode/decode the named memory support as part of the qualifier. If more than 8 qualifiers are added, these macros need to be adjusted. */ -#define ENCODE_QUAL_ADDR_SPACE(NUM) ((NUM & 0xFF) << 8) +#define ENCODE_QUAL_ADDR_SPACE(NUM) (((NUM) & 0xFF) << 8) #define DECODE_QUAL_ADDR_SPACE(X) (((X) >> 8) & 0xFF) /* Return all qualifiers except for the address space qualifiers. */