gcc/testsuite/gcc.dg/pr69047.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-forwprop4" } */
   3
   4 __UINT8_TYPE__
   5 f(__UINT16_TYPE__ b)
   6 {
   7   __UINT8_TYPE__ a;
   8 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
   9   __builtin_memcpy(&a, &b, sizeof a);
  10 #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
  11   __builtin_memcpy(&a, (char *)&b + sizeof a, sizeof a);
  12 #else
  13   a = b;
  14 #endif
  15   return a;
  16 }
  17
  18 /* { dg-final { scan-tree-dump "_\[0-9\]+ = \\(\[^)\]+\\) b" "forwprop4" } } */