gcc/testsuite/gcc.dg/tree-ssa/vrp104.c

   1 /* PR tree-optimization/18046  */
   2 /* { dg-options "-O2 -fdump-tree-switchlower" }  */
   3 /* We scan for 2 switches as the dump file reports a transformation,
   4    IL really contains just a single.  */
   5 /* { dg-final { scan-tree-dump-times "switch" 2 "switchlower" } }  */
   6
   7 void foo (void);
   8 void bar (void);
   9 void baz (void);
  10
  11 void
  12 test (int i)
  13 {
  14   switch (i)
  15     {
  16     case 1:
  17       foo ();
  18       break;
  19     case 2:
  20       bar ();
  21       break;
  22     default:
  23       break;
  24     }
  25
  26   /* This switch should be gone after threading/VRP.  */
  27   switch (i)
  28     {
  29     case 1:
  30       foo ();
  31       break;
  32     case 2:
  33       baz ();
  34       break;
  35     default:
  36       break;
  37     }
  38 }