gcc/testsuite/gcc.dg/tree-ssa/pr21563.c

   1 /* PR tree-optimization/21563
   2    Make sure VRP folds the second "if" statement.  */
   3
   4 /* { dg-do compile } */
   5 /* { dg-options "-O2 -fno-thread-jumps -fdisable-tree-evrp -fdump-tree-vrp1-details" } */
   6
   7 int
   8 foo (int a)
   9 {
  10   if (a > 1)
  11     if (a == 0)
  12       return 1;
  13   return 0;
  14 }
  15
  16 /* { dg-final { scan-tree-dump-times "Folding predicate" 1 "vrp1"} } */