Subversion Repositories openrisc_2011-10-31

/* A test for strength reduction of ivs with nonconstant step.  */

/* { dg-do compile } */

/* { dg-options "-O1 -fdump-tree-optimized" } */

int bar (void);

int a[100];

void xxx (void)

{

  int iter, step = bar ();

  for (iter = 0; iter < 10; iter++)

    a[iter * step] = bar ();

}

/* The array access should be strength reduced.  But to determine the value of

   the step, we need to calculate step * sizeof (int), thus we need to be

   a bit careful about which multiplications we disallow.  */

/* { dg-final { scan-tree-dump-times "step \\* \[^0-9\]" 0 "optimized" } } */

/* { dg-final { scan-tree-dump-times "\[^0-9\] \\* step" 0 "optimized" } } */

/* { dg-final { cleanup-tree-dump "optimized" } } */