gcc/testsuite/gcc.dg/tree-ssa/vrp04.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fno-tree-fre -fdump-tree-vrp1" } */
   3
   4 int
   5 foo (int a, int b)
   6 {
   7   if (a == b)
   8     /* This should be folded to if (1)  */
   9     if (a == b)
  10       return a + b;
  11 }
  12
  13 /* { dg-final { scan-tree-dump-times "if" 1 "vrp1" } } */