diff options
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.c-torture/execute/pr61306-2.c')
-rw-r--r-- | gcc-4.9/gcc/testsuite/gcc.c-torture/execute/pr61306-2.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.c-torture/execute/pr61306-2.c b/gcc-4.9/gcc/testsuite/gcc.c-torture/execute/pr61306-2.c new file mode 100644 index 000000000..886ecfd29 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gcc.c-torture/execute/pr61306-2.c @@ -0,0 +1,40 @@ +#ifdef __INT16_TYPE__ +typedef __INT16_TYPE__ int16_t; +#else +typedef short int16_t; +#endif + +#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)(int16_t)(x) & (uint32_t)0x00ffff00UL) << 8) | \ + (((uint32_t) (x) & (uint32_t)0x00ff0000UL) >> 8) | \ + (((uint32_t) (x) & (uint32_t)0xff000000UL) >> 24))) + + +/* Previous version of bswap optimization failed to consider sign extension + and as a result would replace an expression *not* doing a bswap by a + bswap. */ + +__attribute__ ((noinline, noclone)) uint32_t +fake_bswap32 (uint32_t in) +{ + return __fake_const_swab32 (in); +} + +int +main(void) +{ + if (sizeof (uint32_t) * __CHAR_BIT__ != 32) + return 0; + if (sizeof (int16_t) * __CHAR_BIT__ != 16) + return 0; + if (fake_bswap32 (0x81828384) != 0xff838281) + __builtin_abort (); + return 0; +} |