gcc/testsuite/gcc.dg/builtin-bswap-7.c

   1 /* { dg-do compile { target arm*-*-* alpha*-*-* ia64*-*-* i?86-*-* x86_64-*-* s390x-*-* powerpc*-*-* rs6000-*-* } } */
   2 /* { dg-require-effective-target stdint_types } */
   3 /* { dg-require-effective-target lp64 } */
   4 /* { dg-options "-O -fdump-rtl-combine" } */
   5
   6 /* The branch cost setting prevents the return value from being
   7    calculated with arithmetic instead of doing a compare.  */
   8 /* { dg-additional-options "-mbranch-cost=0" { target branch_cost } } */
   9
  10 #include <stdint.h>
  11
  12 #define BS(X) __builtin_bswap64(X)
  13
  14 int foo1 (uint64_t a)
  15 {
  16   if (BS (a) == 0xA00000000)
  17     return 1;
  18   return 0;
  19 }
  20
  21 int foo2 (uint64_t a)
  22 {
  23   if (BS (a) != 0xA00000000)
  24     return 1;
  25   return 0;
  26 }
  27
  28 int foo3 (uint64_t a, uint64_t b)
  29 {
  30   if (BS (a) == BS (b))
  31     return 1;
  32   return 0;
  33 }
  34
  35 int foo4 (uint64_t a, uint64_t b)
  36 {
  37   if (BS (a) != BS (b))
  38     return 1;
  39   return 0;
  40 }
  41
  42 /* { dg-final { scan-rtl-dump-not "bswapdi" "combine" } } */