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| author | David Daney <ddaney@caviumnetworks.com> | 2009-07-25 20:28:57 +0000 |
|---|---|---|
| committer | David Daney <daney@gcc.gnu.org> | 2009-07-25 20:28:57 +0000 |
| commit | 2df77822ee0974d84b2cb83fba19c4c4f6a3a4b8 (patch) | |
| tree | 1102dce70bb5ef81361767f9dd212b754f1fbd30 /gcc/system.h | |
| parent | 1e211590c3288acd5ea6ff4edb94a1efd5ec25f7 (diff) | |
| download | gcc-2df77822ee0974d84b2cb83fba19c4c4f6a3a4b8.tar.gz | |
system.h (gcc_assert): Invoke __builtin_unreachable() instead of fancy_abort() if !ENABLE_ASSERT_CHECKING.
* system.h (gcc_assert): Invoke __builtin_unreachable() instead of
fancy_abort() if !ENABLE_ASSERT_CHECKING.
(gcc_unreachable): Invoke __builtin_unreachable() if
!ENABLE_ASSERT_CHECKING.
From-SVN: r150091
Diffstat (limited to 'gcc/system.h')
| -rw-r--r-- | gcc/system.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/system.h b/gcc/system.h index 780fda410ce..51dcf54c1d8 100644 --- a/gcc/system.h +++ b/gcc/system.h @@ -576,6 +576,9 @@ extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN; #if ENABLE_ASSERT_CHECKING #define gcc_assert(EXPR) \ ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0)) +#elif (GCC_VERSION >= 4005) +#define gcc_assert(EXPR) \ + ((void)(__builtin_expect(!(EXPR), 0) ? __builtin_unreachable(), 0 : 0)) #else /* Include EXPR, so that unused variable warnings do not occur. */ #define gcc_assert(EXPR) ((void)(0 && (EXPR))) @@ -583,7 +586,11 @@ extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN; /* Use gcc_unreachable() to mark unreachable locations (like an unreachable default case of a switch. Do not use gcc_assert(0). */ +#if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING +#define gcc_unreachable() __builtin_unreachable() +#else #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__)) +#endif /* Provide a fake boolean type. We make no attempt to use the C99 _Bool, as it may not be available in the bootstrap compiler, |