gcc/testsuite/gcc.dg/tree-ssa/pr15349.c

   1 /* PR 15349.  Merge two PHI nodes.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O1 -fdump-tree-mergephi" } */
   4
   5 int
   6 foo (int a, int b)
   7 {
   8   int t;
   9
  10   if (b)
  11     {
  12       if (a)
  13         t = 3;
  14       else
  15         t = 5;
  16
  17       a = 0;
  18     }
  19   else
  20     t = 7;
  21
  22   return t;
  23 }
  24
  25 /* { dg-final { scan-tree-dump-times "PHI" 1 "mergephi2"} } */
  26 /* { dg-final { cleanup-tree-dump "mergephi\[1-2\]" } } */