1/* A test for strength reduction of ivs with nonconstant step.  */
2
3/* { dg-do compile } */
4/* { dg-options "-O1 -fdump-tree-optimized" } */
5
6int bar (void);
7
8int a[100];
9
10void xxx (void)
11{
12  int iter, step = bar ();
13
14  for (iter = 0; iter < 10; iter++)
15    a[iter * step] = bar ();
16}
17
18/* The array access should be strength reduced.  But to determine the value of
19   the step, we need to calculate step * sizeof (int), thus we need to be
20   a bit careful about which multiplications we disallow.  */
21
22/* { dg-final { scan-tree-dump-times "step \\* \[^0-9\]" 0 "optimized" } } */
23/* { dg-final { scan-tree-dump-times "\[^0-9\] \\* step" 0 "optimized" } } */
24
25/* { dg-final { cleanup-tree-dump "optimized" } } */
26