gcc/testsuite/gcc.dg/loop-unswitch-17.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -funswitch-loops -fdump-tree-unswitch-optimized -fno-tree-ch" } */
   3
   4 int foo (int a)
   5 {
   6   do
   7     {
   8       if (a == 1)
   9         return 0;
  10       switch (a)
  11         {
  12         case 1:
  13           return 5;
  14         case 2:
  15           return 7;
  16         case 3:
  17           return 11;
  18         default:;
  19         }
  20     }
  21   while (1);
  22 }
  23
  24 /* { dg-final { scan-tree-dump-times "unswitching loop" 3 "unswitch" } } */