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mesa: Add unreachable() macro.

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Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
This commit is contained in:
Matt Turner 2013-11-04 16:24:35 -08:00
parent b35ea09349
commit 3a5223c24c
1 changed files with 15 additions and 0 deletions
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15
src/mesa/main/compiler.h
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@ -248,6 +248,21 @@ static INLINE GLuint CPU_TO_LE32(GLuint x)
(void) sizeof(char [1 - 2*!(COND)]); \
} while (0)
/**
* Unreachable macro. Useful for suppressing "control reaches end of non-void
* function" warnings.
*/
#if __GNUC__ >= 4 && __GNUC_MINOR__ >= 5
#define unreachable() __builtin_unreachable()
#elif (defined(__clang__) && defined(__has_builtin))
# if __has_builtin(__builtin_unreachable)
# define unreachable() __builtin_unreachable()
# endif
#endif
#ifndef unreachable
#define unreachable()
#endif
#if (__GNUC__ >= 3)
#define PRINTFLIKE(f, a) __attribute__ ((format(__printf__, f, a)))