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2022-09-12stdatomic.h: Do not define ATOMIC_VAR_INIT for C2xJoseph Myers1-0/+2
The <stdatomic.h> macro ATOMIC_VAR_INIT, previously declared obsolete, is removed completely in C2x; disable it for C2x in GCC's implementation. (Although ATOMIC_* are reserved names for this header, disabling the macro for C2x still seems appropriate.) Bootstrapped with no regressions for x86_64-pc-linux-gnu. gcc/ * ginclude/stdatomic.h [defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L] (ATOMIC_VAR_INIT): Do not define. gcc/testsuite/ * gcc.dg/atomic/c2x-stdatomic-var-init-1.c: New test.
2022-08-08C: Implement C2X N2653 char8_t and UTF-8 string literal changesTom Honermann1-0/+6
This patch implements the core language and compiler dependent library changes adopted for C2X via WG14 N2653. The changes include: - Change of type for UTF-8 string literals from array of const char to array of const char8_t (unsigned char). - A new atomic_char8_t typedef. - A new ATOMIC_CHAR8_T_LOCK_FREE macro defined in terms of the existing __GCC_ATOMIC_CHAR8_T_LOCK_FREE predefined macro. gcc/ChangeLog: * ginclude/stdatomic.h (atomic_char8_t, ATOMIC_CHAR8_T_LOCK_FREE): New typedef and macro. gcc/c/ChangeLog: * c-parser.cc (c_parser_string_literal): Use char8_t as the type of CPP_UTF8STRING when char8_t support is enabled. * c-typeck.cc (digest_init): Allow initialization of an array of character type by a string literal with type array of char8_t. gcc/c-family/ChangeLog: * c-lex.cc (lex_string, lex_charconst): Use char8_t as the type of CPP_UTF8CHAR and CPP_UTF8STRING when char8_t support is enabled. * c-opts.cc (c_common_post_options): Set flag_char8_t if targeting C2x. gcc/testsuite/ChangeLog: * gcc.dg/atomic/c2x-stdatomic-lockfree-char8_t.c: New test. * gcc.dg/atomic/gnu2x-stdatomic-lockfree-char8_t.c: New test. * gcc.dg/c11-utf8str-type.c: New test. * gcc.dg/c17-utf8str-type.c: New test. * gcc.dg/c2x-utf8str-type.c: New test. * gcc.dg/c2x-utf8str.c: New test. * gcc.dg/gnu2x-utf8str-type.c: New test. * gcc.dg/gnu2x-utf8str.c: New test.
2022-01-03Update copyright years.Jakub Jelinek1-1/+1
2021-01-04Update copyright years.Jakub Jelinek1-1/+1
2020-11-26C: Do not drop qualifiers in typeof for _Atomic types. [PR65455,PR92935]Martin Uecker1-7/+7
2020-11-25 Martin Uecker <muecker@gwdg.de> gcc/c/ PR c/65455 PR c/92935 * c-parser.c (c_parser_declaration_or_fndef): Remove redundant code to drop qualifiers of _Atomic types for __auto_type. (c_parser_typeof_specifier): Do not drop qualifiers of _Atomic types for __typeof__. gcc/ PR c/65455 PR c/92935 * ginclude/stdatomic.h: Use comma operator to drop qualifiers. gcc/testsuite/ PR c/65455 PR c/92935 * gcc.dg/typeof-2.c: Adapt test.
2020-01-01Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r279813
2019-01-01Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r267494
2018-01-03Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r256169
2017-01-01Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r243994
2016-01-04Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r232055
2015-12-16PR c/68868 - atomic_init emits an unnecessary fenceMartin Sebor1-6/+4
gcc/ChangeLog * ginclude/stdatomic.h (atomic_init): Use atomic_store instead of plain assignment. gcc/testsuite/ChangeLog * testsuite/gcc.dg/atomic/stdatomic-init.c: New test. From-SVN: r231733
2015-11-18Add out-of-line versions of some <stdatomic.h> functions (PR c/65083).Joseph Myers1-0/+7
PR c/65083 notes that some functions in <stdatomic.h> are normal functions, not generic functions, and so need to have out-of-line copies that can be called when macro expansion is suppressed (unlike the generic functions where DR#419 makes it undefined if you suppress a macro expansion). This patch adds such out-of-line definitions in libatomic for those six functions, at a new LIBATOMIC_1.2 symbol version, as trivial wrappers to the <stdatomic.h> macros, along with declarations of those functions in <stdatomic.h>. Tests are added that are based on the corresponding tests for the macros, but with parentheses around the function names to force the out-of-line functions to be used. Bootstrapped with no regressions on x86_64-pc-linux-gnu. gcc: * ginclude/stdatomic.h (atomic_thread_fence, atomic_signal_fence) (atomic_flag_test_and_set, atomic_flag_test_and_set_explicit) (atomic_flag_clear, atomic_flag_clear_explicit): Declare as functions before defining as macros. gcc/testsuite: * gcc.dg/atomic/stdatomic-fence-2.c, gcc.dg/atomic/stdatomic-flag-2.c: New tests. libatomic: * fence.c, flag.c: New files. * Makefile.am (libatomic_la_SOURCES): Add fence.c and flag.c. * Makefile.in: Regenerate. * configure.ac (libtool_VERSION): Change to 3:0:2. * configure: Regenerate. * libatomic.map (LIBATOMIC_1.2): New symbol version. From-SVN: r230578
2015-01-05Update copyright years.Jakub Jelinek1-1/+1
From-SVN: r219188
2014-08-14DR 458Marek Polacek1-24/+10
DR 458 * ginclude/stdatomic.h (__atomic_type_lock_free): Remove. (ATOMIC_*_LOCK_FREE): Map to __GCC_ATOMIC_*_LOCK_FREE. * gcc.dg/c11-stdatomic-2.c: New test. From-SVN: r213981
2014-01-02Update copyright years in gcc/Richard Sandiford1-1/+1
From-SVN: r206289
2013-11-13extend.texi (Statement Exprs, Typeof): Discuss __auto_type.Joseph Myers1-17/+25
* doc/extend.texi (Statement Exprs, Typeof): Discuss __auto_type. * ginclude/stdatomic.h (kill_dependency, atomic_store_explicit) (atomic_load_explicit, atomic_exchange_explicit) (atomic_compare_exchange_strong_explicit) (atomic_compare_exchange_weak_explicit): Use __auto_type to declare variable initialized with PTR argument. c-family: * c-common.h (enum rid): Add RID_AUTO_TYPE. * c-common.c (c_common_reswords): Add __auto_type. (keyword_begins_type_specifier): Handle RID_AUTO_TYPE. c: * c-tree.h (c_typespec_keyword): Add cts_auto_type. * c-decl.c (declspecs_add_type, finish_declspecs): Handle __auto_type. * c-parser.c (c_token_starts_typename, c_token_starts_declspecs) (c_parser_attribute_any_word, c_parser_objc_selector): Handle RID_AUTO_TYPE. (c_parser_declspecs): Take argument AUTO_TYPE_OK. (c_parser_declaration_or_fndef, c_parser_struct_declaration) (c_parser_declarator, c_parser_direct_declarator_inner) (c_parser_parameter_declaration, c_parser_type_name): All callers changed. (c_parser_declaration_or_fndef): Handle declarations with type determined from the initializer. testsuite: * gcc.dg/atomic/stdatomic-vm.c, gcc.dg/auto-type-1.c, gcc.dg/auto-type-2.c: New tests. From-SVN: r204731
2013-11-08[multiple changes]Joseph Myers1-0/+244
2013-11-08 Andrew MacLeod <amacleod@redhat.com> Joseph Myers <joseph@codesourcery.com> * ginclude/stdatomic.h: New file. * Makefile.in (USER_H): Add stdatomic.h. testsuite: 2013-11-08 Joseph Myers <joseph@codesourcery.com> * gcc.dg/atomic/stdatomic-compare-exchange-1.c, gcc.dg/atomic/stdatomic-compare-exchange-2.c, gcc.dg/atomic/stdatomic-compare-exchange-3.c, gcc.dg/atomic/stdatomic-compare-exchange-4.c, gcc.dg/atomic/stdatomic-exchange-1.c, gcc.dg/atomic/stdatomic-exchange-2.c, gcc.dg/atomic/stdatomic-exchange-3.c, gcc.dg/atomic/stdatomic-exchange-4.c, gcc.dg/atomic/stdatomic-fence.c, gcc.dg/atomic/stdatomic-flag.c, gcc.dg/atomic/stdatomic-generic.c, gcc.dg/atomic/stdatomic-kill-dep.c, gcc.dg/atomic/stdatomic-load-1.c, gcc.dg/atomic/stdatomic-load-2.c, gcc.dg/atomic/stdatomic-load-3.c, gcc.dg/atomic/stdatomic-load-4.c, gcc.dg/atomic/stdatomic-lockfree.c, gcc.dg/atomic/stdatomic-op-1.c, gcc.dg/atomic/stdatomic-op-2.c, gcc.dg/atomic/stdatomic-op-3.c, gcc.dg/atomic/stdatomic-op-4.c, gcc.dg/atomic/stdatomic-store-1.c, gcc.dg/atomic/stdatomic-store-2.c, gcc.dg/atomic/stdatomic-store-3.c, gcc.dg/atomic/stdatomic-store-4.c, gcc.dg/c11-stdatomic-1.c: New tests. From-SVN: r204603
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