gcc/testsuite/gcc.dg/tree-ssa/loop-6.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -funswitch-loops -fdump-tree-unswitch-details -fdump-tree-optimized" } */
   3
   4 int ch;
   5 int a[100];
   6
   7 void xxx(void)
   8 {
   9   int i;
  10
  11   for (i = 0; i < 100; i++)
  12     {
  13       if (ch)
  14         a[i] = ch;
  15       else
  16         a[i] = i;
  17     }
  18 }
  19
  20 /* Loop should be unswitched.  */
  21
  22 /* { dg-final { scan-tree-dump-times "Unswitching loop" 1 "unswitch" } } */
  23 /* { dg-final { cleanup-tree-dump "unswitch" } } */
  24
  25 /* In effect there should be exactly three conditional jumps in the final program.  */
  26
  27 /* { dg-final { scan-tree-dump-times "else" 3 "optimized" } } */
  28 /* { dg-final { cleanup-tree-dump "optimized" } } */