gcc/testsuite/gcc.dg/pr58742-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-cddce1" } */
   3
   4 __SIZE_TYPE__
   5 fx (char *a, __SIZE_TYPE__ sz)
   6 {
   7   char *b = a + sz;
   8   /* The first forwprop pass should optimize this to return sz;  */
   9   return b - a;
  10 }
  11
  12 /* { dg-final { scan-tree-dump "return sz" "cddce1" } } */