diff options
Diffstat (limited to 'gcc-4.8/gcc/testsuite/gcc.c-torture/execute/pr60454.c')
-rw-r--r-- | gcc-4.8/gcc/testsuite/gcc.c-torture/execute/pr60454.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/gcc-4.8/gcc/testsuite/gcc.c-torture/execute/pr60454.c b/gcc-4.8/gcc/testsuite/gcc.c-torture/execute/pr60454.c new file mode 100644 index 000000000..ceec45e69 --- /dev/null +++ b/gcc-4.8/gcc/testsuite/gcc.c-torture/execute/pr60454.c @@ -0,0 +1,31 @@ +#ifdef __UINT32_TYPE__ +typedef __UINT32_TYPE__ uint32_t; +#else +typedef unsigned uint32_t; +#endif + +#define __fake_const_swab32(x) ((uint32_t)( \ + (((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) | \ + (((uint32_t)(x) & (uint32_t)0x0000ff00UL) << 8) | \ + (((uint32_t)(x) & (uint32_t)0x000000ffUL) << 8) | \ + (((uint32_t)(x) & (uint32_t)0x0000ff00UL) ) | \ + (((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24))) + +/* Previous version of bswap optimization would detect byte swap when none + happen. This test aims at catching such wrong detection to avoid + regressions. */ + +__attribute__ ((noinline, noclone)) uint32_t +fake_swap32 (uint32_t in) +{ + return __fake_const_swab32 (in); +} + +int main(void) +{ + if (sizeof (uint32_t) * __CHAR_BIT__ != 32) + return 0; + if (fake_swap32 (0x12345678UL) != 0x78567E12UL) + __builtin_abort (); + return 0; +} |