gcc/testsuite/gcc.dg/tree-ssa/reassoc-9.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-reassoc1" } */
   3
   4 int main(int a, int b, int c, int d, int e, int f, int g, int h)
   5 {
   6   /* Should be transformed into e = 20 */
   7   int i = (a + 9) + (c + 8);
   8   int j = (-c + 1) + (-a + 2);
   9
  10   e = i + j;
  11   return e;
  12 }
  13
  14 /* We can always re-associate to a final constant but the current
  15    implementation does not allow easy roll-back without IL changes.  */
  16
  17 /* { dg-final { scan-tree-dump-times "= 20" 1 "reassoc1" { xfail *-*-* } } } */