gcc/testsuite/gcc.dg/tree-ssa/slsr-13.c

   1 /* x2 and x3 will be strength-reduced based on the same statement
   2    but with different variables as the stride.  Note that they will
   3    be strength-reduced by introducing an initializer 4*s which is
   4    cheaper than 5*s; similar for 4*c and 5*c.  */
   5
   6 /* { dg-do compile } */
   7 /* { dg-options "-O3 -fdump-tree-optimized" } */
   8
   9 int
  10 f (int s, int c)
  11 {
  12   int a2, a3, x1, x2, x3, x;
  13
  14   x1 = c + s;
  15   a2 = 5 * s;
  16   x2 = c + a2;
  17   a3 = 5 * c;
  18   x3 = s + a3;
  19   x = x1 + x2 + x3;
  20   return x;
  21 }
  22
  23 /* { dg-final { scan-tree-dump-times " \\* 4" 2 "optimized" {xfail hppa*64*-*-* } } } */
  24 /* { dg-final { scan-tree-dump-times " \\* 5" 0 "optimized" {xfail hppa*64*-*-* } } } */