gcc/testsuite/gcc.dg/tree-ssa/slsr-17.c

   1 /* Straight-line strength reduction control flow variation with incr = 1.  */
   2
   3 /* { dg-do compile } */
   4 /* { dg-options "-O3 -fdump-tree-optimized" } */
   5
   6 int
   7 f (int n, int c, int s)
   8 {
   9   int a2, a3, a4, x1, x2, x3, x4;
  10
  11   x1 = c + s;
  12   x2 = x3 = x4 = c;
  13
  14   if (n > 64)
  15     {
  16       a2 = 2 * s;
  17       x2 = c + a2;
  18       a3 = 3 * s;
  19       x3 = c + a3;
  20     }
  21   else
  22     {
  23       a4 = 2 * s;
  24       x4 = c + a4;
  25     }
  26
  27   return x1 + x2 + x3 + x4;
  28 }
  29
  30 /* { dg-final { scan-tree-dump-times " \\* " 0 "optimized" } } */