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llvm-project/clang/test/Lexer/has_feature_c1x.c

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Switch C compilations to C11 by default. This is long-since overdue, and matches GCC 5.0. This should also be backwards-compatible, because we already supported all of C11 as an extension in C99 mode. llvm-svn: 220244
2014-10-21 07:26:58 +08:00
// RUN: %clang_cc1 -E -triple x86_64-linux-gnu -std=c89 %s -o - | FileCheck --check-prefix=CHECK-NO-1X %s
// RUN: %clang_cc1 -E -triple x86_64-linux-gnu -std=iso9899:199409 %s -o - | FileCheck --check-prefix=CHECK-NO-1X %s
// RUN: %clang_cc1 -E -triple x86_64-linux-gnu -std=c99 %s -o - | FileCheck --check-prefix=CHECK-NO-1X %s
// RUN: %clang_cc1 -E -triple x86_64-linux-gnu -std=c11 %s -o - | FileCheck --check-prefix=CHECK-1X %s
//
// RUN: %clang_cc1 -E -triple x86_64-linux-gnu -std=gnu89 %s -o - | FileCheck --check-prefix=CHECK-NO-1X %s
// RUN: %clang_cc1 -E -triple x86_64-linux-gnu -std=gnu99 %s -o - | FileCheck --check-prefix=CHECK-NO-1X %s
// RUN: %clang_cc1 -E -triple x86_64-linux-gnu -std=gnu11 %s -o - | FileCheck --check-prefix=CHECK-1X %s
Introduce __has_extension macro __has_extension is a function-like macro which takes the same set of feature identifiers as __has_feature. It evaluates to 1 if the feature is supported by Clang in the current language (either as a language extension or a standard language feature) or 0 if not. At the same time, add support for the C1X feature identifiers c_generic_selections (renamed from generic_selections) and c_static_assert, and document them. Patch by myself and Jean-Daniel Dupas. llvm-svn: 131308
2011-05-14 04:54:45 +08:00
Some improvements to the handling of C11 atomic types: - Add atomic-to/from-nonatomic cast types - Emit atomic operations for arithmetic on atomic types - Emit non-atomic stores for initialisation of atomic types, but atomic stores and loads for every other store / load - Add a __atomic_init() intrinsic which does a non-atomic store to an _Atomic() type. This is needed for the corresponding C11 stdatomic.h function. - Enables the relevant __has_feature() checks. The feature isn't 100% complete yet, but it's done enough that we want people testing it. Still to do: - Make the arithmetic operations on atomic types (e.g. Atomic(int) foo = 1; foo++;) use the correct LLVM intrinsic if one exists, not a loop with a cmpxchg. - Add a signal fence builtin - Properly set the fenv state in atomic operations on floating point values - Correctly handle things like _Atomic(_Complex double) which are too large for an atomic cmpxchg on some platforms (this requires working out what 'correctly' means in this context) - Fix the many remaining corner cases llvm-svn: 148242
2012-01-17 01:27:18 +08:00
#if __has_feature(c_atomic)
int has_atomic();
#else
int no_atomic();
#endif
// CHECK-1X: has_atomic
// CHECK-NO-1X: no_atomic
Introduce __has_extension macro __has_extension is a function-like macro which takes the same set of feature identifiers as __has_feature. It evaluates to 1 if the feature is supported by Clang in the current language (either as a language extension or a standard language feature) or 0 if not. At the same time, add support for the C1X feature identifiers c_generic_selections (renamed from generic_selections) and c_static_assert, and document them. Patch by myself and Jean-Daniel Dupas. llvm-svn: 131308
2011-05-14 04:54:45 +08:00
#if __has_feature(c_static_assert)
int has_static_assert();
#else
int no_static_assert();
#endif
// CHECK-1X: has_static_assert
// CHECK-NO-1X: no_static_assert
#if __has_feature(c_generic_selections)
int has_generic_selections();
#else
int no_generic_selections();
#endif
// CHECK-1X: has_generic_selections
// CHECK-NO-1X: no_generic_selections
Add c_alignas and cxx_alignas features llvm-svn: 142020
2011-10-15 07:44:46 +08:00
#if __has_feature(c_alignas)
int has_alignas();
#else
int no_alignas();
#endif
// CHECK-1X: has_alignas
// CHECK-NO-1X: no_alignas
Give __STDC_VERSION__ the value 201001L when we're in C1x mode. The committee hasn't set a value for __STDC_VERSION__ yet, so this is a placeholder. But at least it's > 199901L. llvm-svn: 143245
2011-10-29 07:02:54 +08:00
C++11 support is now feature-complete. llvm-svn: 179861
2013-04-20 01:00:31 +08:00
#if __has_feature(c_thread_local)
int has_thread_local();
#else
int no_thread_local();
#endif
// CHECK-1X: has_thread_local
// CHECK-NO-1X: no_thread_local
Give __STDC_VERSION__ the value 201001L when we're in C1x mode. The committee hasn't set a value for __STDC_VERSION__ yet, so this is a placeholder. But at least it's > 199901L. llvm-svn: 143245
2011-10-29 07:02:54 +08:00
#if __STDC_VERSION__ > 199901L
int is_c1x();
#else
int is_not_c1x();
#endif
// CHECK-1X: is_c1x
// CHECK-NO-1X: is_not_c1x