diff options
Diffstat (limited to 'src/util/macros.h')
| -rw-r--r-- | src/util/macros.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/util/macros.h b/src/util/macros.h index da5daff9bf8..5fc6729536c 100644 --- a/src/util/macros.h +++ b/src/util/macros.h @@ -29,6 +29,10 @@ # define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x))) #endif +/* For compatibility with Clang's __has_builtin() */ +#ifndef __has_builtin +# define __has_builtin(x) 0 +#endif /** * __builtin_expect macros @@ -85,7 +89,13 @@ do { \ * Assume macro. Useful for expressing our assumptions to the compiler, * typically for purposes of silencing warnings. */ -#ifdef HAVE___BUILTIN_UNREACHABLE +#if __has_builtin(__builtin_assume) +#define assume(expr) \ +do { \ + assert(expr); \ + __builtin_assume(expr); \ +} while (0) +#elif defined HAVE___BUILTIN_UNREACHABLE #define assume(expr) ((expr) ? ((void) 0) \ : (assert(!"assumption failed"), \ __builtin_unreachable())) |