gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-11.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-iftoswitch-optimized" } */
   3
   4 struct f {
   5   int len;
   6   int arr[4];
   7 };
   8
   9 int
  10 test (struct f const *const f)
  11 {
  12   if (f->arr[3] == 1) {
  13     return 12;
  14   } else if (f->arr[3] == 2) {
  15     return 27;
  16   } else if (f->arr[3] == 3) {
  17     return 38;
  18   } else if (f->arr[3] == 4) {
  19     return 18;
  20   } else if (f->arr[3] == 5) {
  21     return 58;
  22   } else if (f->arr[3] == 6) {
  23     return 68;
  24   }
  25   return 0;
  26 }
  27
  28 /* { dg-final { scan-tree-dump "Canonical GIMPLE case clusters: 1 2 3 4 5 6" "iftoswitch" } } */