gcc/testsuite/gcc.dg/tree-ssa/vrp34.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-vrp1" } */
   3
   4 void bar (void);
   5
   6 void
   7 foo (int a)
   8 {
   9   switch (a)
  10     {
  11     case 4:
  12       if (a >= 3)
  13         if (a <= 5)
  14           bar ();
  15     }
  16 }
  17
  18 /* { dg-final { scan-tree-dump "Folding predicate a_. > 2 to 1" "vrp1" } } */
  19 /* { dg-final { scan-tree-dump "Folding predicate a_. <= 5 to 1" "vrp1" } } */
  20 /* { dg-final { cleanup-tree-dump "vrp1" } } */