gcc/testsuite/c-c++-common/pr86093.c

   1 /* PR c/86093 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fdump-tree-optimized" } */
   4 /* { dg-final { scan-tree-dump-not "return 0;" "optimized" } } */
   5
   6 char *volatile p;
   7
   8 __PTRDIFF_TYPE__
   9 foo (void)
  10 {
  11   return p - p;
  12 }