gcc/testsuite/gcc.dg/cmp-mem-const-4.c

   1 /* { dg-do compile { target { lp64 && { ! sparc*-*-* } } } } */
   2 /* Excluding sparc since there we do not end up with a comparison of memory and
   3    a constant which means that the optimization is not applicable.  */
   4 /* { dg-options "-O2 -fdump-rtl-combine-details" } */
   5 /* { dg-final { scan-rtl-dump "narrow comparison from mode .I to HI" "combine" } } */
   6
   7 typedef __UINT64_TYPE__ uint64_t;
   8
   9 int
  10 ge_2bytes_a (uint64_t *x)
  11 {
  12   return *x > 0x400cffffffffffff;
  13 }
  14
  15 int
  16 ge_2bytes_b (uint64_t *x)
  17 {
  18   return *x >= 0x400d000000000000;
  19 }