diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/pr43280.c')
-rw-r--r-- | gcc/testsuite/gcc.dg/pr43280.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr43280.c b/gcc/testsuite/gcc.dg/pr43280.c new file mode 100644 index 000000000..dfb369b5d --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr43280.c @@ -0,0 +1,30 @@ +/* { dg-do run } */ +/* { dg-require-effective-target stdint_types } */ +/* { dg-options "-O2" } */ + +#include <stdint.h> + +extern void abort (void); + +uint64_t __attribute__((noinline)) +byteswap64(uint64_t x) +{ + uint32_t a = x >> 32; + uint32_t b = (uint32_t) x; + return ((uint64_t) ((((((b)) >> (8)) | (((b)) << (32 - (8)))) & 0xff00ff00L) + | (((((b)) << (8)) | (((b)) >> (32 - (8)))) & 0x00ff00ffL)) << 32) + | (uint64_t) ((((((a)) >> (8)) | (((a)) << (32 - (8)))) & 0xff00ff00L) + | (((((a)) << (8)) | (((a)) >> (32 - (8)))) & 0x00ff00ffL)); +} + +int +main () +{ + uint64_t in = (uint64_t)0x01020304 << 32 | 0x05060708; + uint64_t cmp = (uint64_t)0x08070605 << 32 | 0x04030201; + + if (cmp != byteswap64 (in)) + abort (); + + return 0; +} |