gcc/testsuite/gcc.dg/loop-unswitch-9.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -funswitch-loops -fdump-tree-unswitch-optimized" } */
   3
   4 int
   5 foo(double *a, double *b, double *c, double *d, double *r, int size, int order)
   6 {
   7   for (int i = 0; i < size; i++)
   8   {
   9     double tmp;
  10
  11     if (order == 1)
  12       tmp = -8 * a[i];
  13     else
  14       {
  15         if (order == 2)
  16           tmp = -4 * b[i];
  17         else
  18           tmp = a[i];
  19       }
  20
  21     r[i] = 3.4f * tmp + d[i];
  22   }
  23
  24   return 0;
  25 }
  26
  27 /* { dg-final { scan-tree-dump-times "unswitching loop . on .if. with condition: order" 2 "unswitch" } } */