gcc/testsuite/gcc.dg/tree-ssa/ssa-dce-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-dce3" } */
   3
   4 int t() __attribute__ ((const));
   5 void
   6 q()
   7 {
   8   int i = t();
   9   if (!i)
  10     i = t();
  11 }
  12 /* There should be no IF conditionals.  */
  13 /* { dg-final { scan-tree-dump-times "if " 0 "dce3"} } */