gcc/testsuite/gcc.dg/tree-ssa/slsr-35.c

   1 /* Verify straight-line strength reduction for a candidate with a basis
   2    hidden by a phi dependences, having a known stride, and where the
   3    phi has an argument which is a parameter.  */
   4
   5 /* { dg-do compile } */
   6 /* { dg-options "-O3 -fno-code-hoisting -fdump-tree-optimized" } */
   7
   8 int
   9 f (int c, int i)
  10 {
  11   int a1, a3, x1, x3, x;
  12
  13   a1 = i * 16;
  14   x1 = c + a1;
  15
  16   if (x1 > 6)
  17     i = i + 2;
  18
  19   i = i + 2;
  20   a3 = i * 16;
  21   x3 = c + a3;
  22
  23   x = x1 + x3;
  24   return x;
  25 }
  26
  27 /* { dg-final { scan-tree-dump-times " \\* " 1 "optimized" } } */