gcc/testsuite/gcc.dg/loop-unswitch-12.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       tmp = -4 * b[i];
  15
  16     double x = 3 * tmp + d[i] + tmp;
  17
  18     if (order == 1)
  19       x += 2;
  20
  21     double y = 3.4f * tmp + d[i];
  22     r[i] = x + y;
  23   }
  24
  25   return 0;
  26 }
  27
  28 /* { dg-final { scan-tree-dump-times "unswitching loop . on .if. with condition: order.* == 1" 1 "unswitch" } } */