gnu/dist/gcc4/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-optimized" } */
   3
   4 int f(int a, int b, int c)
   5 {
   6   if (c == 0) goto temp;
   7   if (a == 0)
   8    return 0;
   9 temp:
  10   if (a == b)
  11    return a;
  12  return a;
  13 }
  14
  15 /* There should be no ifs as the PHI arguments, we did not
  16    optimize this before because PHI-OPT did not look at
  17    PHIs which have more than two arguments.  */
  18 /* { dg-final { scan-tree-dump-times "if" 0 "optimized"} } */
  19 /* { dg-final { cleanup-tree-dump "optimized" } } */