gcc/testsuite/gcc.dg/tree-ssa/slsr-7.c

   1 /* Verify straight-line strength reduction for simple integer subtraction.  */
   2
   3 /* { dg-do compile } */
   4 /* { dg-options "-O3 -fdump-tree-optimized" } */
   5
   6 int
   7 f (int s, int c)
   8 {
   9   int a1, a2, a3, x1, x2, x3, x;
  10
  11   a1 = 2 * s;
  12   x1 = c - a1;
  13   a2 = 4 * s;
  14   x2 = c - a2;
  15   a3 = 6 * s;
  16   x3 = c - a3;
  17   x = x1 + x2 + x3;
  18   return x;
  19 }
  20
  21 /* { dg-final { scan-tree-dump-times " \\* " 1 "optimized" } } */
  22 /* { dg-final { cleanup-tree-dump "optimized" } } */