diff options
Diffstat (limited to 'include/llvm/Support/Compiler.h')
| -rw-r--r-- | include/llvm/Support/Compiler.h | 61 |
1 files changed, 38 insertions, 23 deletions
diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h index 25bf32a..d008fec 100644 --- a/include/llvm/Support/Compiler.h +++ b/include/llvm/Support/Compiler.h @@ -33,14 +33,19 @@ # define __has_builtin(x) 0 #endif -/// \macro __GNUC_PREREQ -/// \brief Defines __GNUC_PREREQ if glibc's features.h isn't available. -#ifndef __GNUC_PREREQ -# if defined(__GNUC__) && defined(__GNUC_MINOR__) -# define __GNUC_PREREQ(maj, min) \ - ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) +/// \macro LLVM_GNUC_PREREQ +/// \brief Extend the default __GNUC_PREREQ even if glibc's features.h isn't +/// available. +#ifndef LLVM_GNUC_PREREQ +# if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__) +# define LLVM_GNUC_PREREQ(maj, min, patch) \ + ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \ + ((maj) << 20) + ((min) << 10) + (patch)) +# elif defined(__GNUC__) && defined(__GNUC_MINOR__) +# define LLVM_GNUC_PREREQ(maj, min, patch) \ + ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10)) # else -# define __GNUC_PREREQ(maj, min) 0 +# define LLVM_GNUC_PREREQ(maj, min, patch) 0 # endif #endif @@ -61,7 +66,7 @@ #define LLVM_MSC_PREREQ(version) 0 #endif -#ifndef _MSC_VER +#if !defined(_MSC_VER) || defined(__clang__) || LLVM_MSC_PREREQ(1900) #define LLVM_NOEXCEPT noexcept #else #define LLVM_NOEXCEPT @@ -70,10 +75,8 @@ /// \brief Does the compiler support r-value reference *this? /// /// Sadly, this is separate from just r-value reference support because GCC -/// implemented everything but this thus far. No release of GCC yet has support -/// for this feature so it is enabled with Clang only. -/// FIXME: This should change to a version check when GCC grows support for it. -#if __has_feature(cxx_rvalue_references) +/// implemented this later than everything else. +#if __has_feature(cxx_rvalue_references) || LLVM_GNUC_PREREQ(4, 8, 1) #define LLVM_HAS_RVALUE_REFERENCE_THIS 1 #else #define LLVM_HAS_RVALUE_REFERENCE_THIS 0 @@ -128,20 +131,26 @@ /// not accessible from outside it. Can also be used to mark variables and /// functions, making them private to any shared library they are linked into. /// On PE/COFF targets, library visibility is the default, so this isn't needed. -#if (__has_attribute(visibility) || __GNUC_PREREQ(4, 0)) && \ +#if (__has_attribute(visibility) || LLVM_GNUC_PREREQ(4, 0, 0)) && \ !defined(__MINGW32__) && !defined(__CYGWIN__) && !defined(LLVM_ON_WIN32) #define LLVM_LIBRARY_VISIBILITY __attribute__ ((visibility("hidden"))) #else #define LLVM_LIBRARY_VISIBILITY #endif -#if __has_attribute(used) || __GNUC_PREREQ(3, 1) +#if __has_attribute(sentinel) || LLVM_GNUC_PREREQ(3, 0, 0) +#define LLVM_END_WITH_NULL __attribute__((sentinel)) +#else +#define LLVM_END_WITH_NULL +#endif + +#if __has_attribute(used) || LLVM_GNUC_PREREQ(3, 1, 0) #define LLVM_ATTRIBUTE_USED __attribute__((__used__)) #else #define LLVM_ATTRIBUTE_USED #endif -#if __has_attribute(warn_unused_result) || __GNUC_PREREQ(3, 4) +#if __has_attribute(warn_unused_result) || LLVM_GNUC_PREREQ(3, 4, 0) #define LLVM_ATTRIBUTE_UNUSED_RESULT __attribute__((__warn_unused_result__)) #else #define LLVM_ATTRIBUTE_UNUSED_RESULT @@ -155,14 +164,14 @@ // more portable solution: // (void)unused_var_name; // Prefer cast-to-void wherever it is sufficient. -#if __has_attribute(unused) || __GNUC_PREREQ(3, 1) +#if __has_attribute(unused) || LLVM_GNUC_PREREQ(3, 1, 0) #define LLVM_ATTRIBUTE_UNUSED __attribute__((__unused__)) #else #define LLVM_ATTRIBUTE_UNUSED #endif // FIXME: Provide this for PE/COFF targets. -#if (__has_attribute(weak) || __GNUC_PREREQ(4, 0)) && \ +#if (__has_attribute(weak) || LLVM_GNUC_PREREQ(4, 0, 0)) && \ (!defined(__MINGW32__) && !defined(__CYGWIN__) && !defined(LLVM_ON_WIN32)) #define LLVM_ATTRIBUTE_WEAK __attribute__((__weak__)) #else @@ -185,7 +194,7 @@ #define LLVM_READONLY #endif -#if __has_builtin(__builtin_expect) || __GNUC_PREREQ(4, 0) +#if __has_builtin(__builtin_expect) || LLVM_GNUC_PREREQ(4, 0, 0) #define LLVM_LIKELY(EXPR) __builtin_expect((bool)(EXPR), true) #define LLVM_UNLIKELY(EXPR) __builtin_expect((bool)(EXPR), false) #else @@ -208,7 +217,7 @@ /// LLVM_ATTRIBUTE_NOINLINE - On compilers where we have a directive to do so, /// mark a method "not for inlining". -#if __has_attribute(noinline) || __GNUC_PREREQ(3, 4) +#if __has_attribute(noinline) || LLVM_GNUC_PREREQ(3, 4, 0) #define LLVM_ATTRIBUTE_NOINLINE __attribute__((noinline)) #elif defined(_MSC_VER) #define LLVM_ATTRIBUTE_NOINLINE __declspec(noinline) @@ -220,7 +229,7 @@ /// so, mark a method "always inline" because it is performance sensitive. GCC /// 3.4 supported this but is buggy in various cases and produces unimplemented /// errors, just use it in GCC 4.0 and later. -#if __has_attribute(always_inline) || __GNUC_PREREQ(4, 0) +#if __has_attribute(always_inline) || LLVM_GNUC_PREREQ(4, 0, 0) #define LLVM_ATTRIBUTE_ALWAYS_INLINE inline __attribute__((always_inline)) #elif defined(_MSC_VER) #define LLVM_ATTRIBUTE_ALWAYS_INLINE __forceinline @@ -236,6 +245,12 @@ #define LLVM_ATTRIBUTE_NORETURN #endif +#if __has_attribute(returns_nonnull) || LLVM_GNUC_PREREQ(4, 9, 0) +#define LLVM_ATTRIBUTE_RETURNS_NONNULL __attribute__((returns_nonnull)) +#else +#define LLVM_ATTRIBUTE_RETURNS_NONNULL +#endif + /// LLVM_EXTENSION - Support compilers where we have a keyword to suppress /// pedantic diagnostics. #ifdef __GNUC__ @@ -262,7 +277,7 @@ /// LLVM_BUILTIN_UNREACHABLE - On compilers which support it, expands /// to an expression which states that it is undefined behavior for the /// compiler to reach this point. Otherwise is not defined. -#if __has_builtin(__builtin_unreachable) || __GNUC_PREREQ(4, 5) +#if __has_builtin(__builtin_unreachable) || LLVM_GNUC_PREREQ(4, 5, 0) # define LLVM_BUILTIN_UNREACHABLE __builtin_unreachable() #elif defined(_MSC_VER) # define LLVM_BUILTIN_UNREACHABLE __assume(false) @@ -270,7 +285,7 @@ /// LLVM_BUILTIN_TRAP - On compilers which support it, expands to an expression /// which causes the program to exit abnormally. -#if __has_builtin(__builtin_trap) || __GNUC_PREREQ(4, 3) +#if __has_builtin(__builtin_trap) || LLVM_GNUC_PREREQ(4, 3, 0) # define LLVM_BUILTIN_TRAP __builtin_trap() #else # define LLVM_BUILTIN_TRAP *(volatile int*)0x11 = 0 @@ -278,7 +293,7 @@ /// \macro LLVM_ASSUME_ALIGNED /// \brief Returns a pointer with an assumed alignment. -#if __has_builtin(__builtin_assume_aligned) && __GNUC_PREREQ(4, 7) +#if __has_builtin(__builtin_assume_aligned) || LLVM_GNUC_PREREQ(4, 7, 0) # define LLVM_ASSUME_ALIGNED(p, a) __builtin_assume_aligned(p, a) #elif defined(LLVM_BUILTIN_UNREACHABLE) // As of today, clang does not support __builtin_assume_aligned. |