gcc/testsuite/gcc.dg/tree-ssa/pr84436-1.c

   1 /* PR tree-optimization/84436 */
   2 /* { dg-options "-O2 -fdump-tree-switchconv -fdump-tree-optimized" } */
   3 /* { dg-do run } */
   4
   5 int
   6 __attribute__ ((noipa))
   7 foo (int how)
   8 {
   9   switch (how) {
  10     case 2: how = 205; break; /* how = 100 * index + 5 */
  11     case 3: how = 305; break;
  12     case 4: how = 405; break;
  13     case 5: how = 505; break;
  14     case 6: how = 605; break;
  15   }
  16   return how;
  17 }
  18
  19 int main()
  20 {
  21   if (foo (2) != 205)
  22   __builtin_abort ();
  23
  24   if (foo (6) != 605)
  25   __builtin_abort ();
  26
  27   if (foo (123) != 123)
  28   __builtin_abort ();
  29
  30   return 0;
  31 }
  32
  33
  34 /* { dg-final { scan-tree-dump-times "100 \\*" 1 "switchconv" } } */
  35 /* { dg-final { scan-tree-dump-times ".* \\+ 5" 1 "switchconv" } } */
  36 /* { dg-final { scan-tree-dump-not "switch" "optimized" } } */