gcc/testsuite/gcc.dg/fold-reassoc-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-original" } */
   3
   4 int foo (int i)
   5 {
   6   return (i + 2) - (i + 1);
   7 }
   8 int bar (int i)
   9 {
  10   return (i + 2) + ~i;
  11 }
  12
  13 /* { dg-final { scan-tree-dump-times "return 1;" 2 "original" } } */