Subversion Repositories openrisc_2011-10-31

/* A test for strength reduction and induction variable elimination.  */

/* { dg-do compile } */

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

/* { dg-require-effective-target size32plus } */

/* Size of this structure should be sufficiently weird so that no memory

   addressing mode applies.  */

struct bla

{

  char x[187];

  int y;

  char z[253];

} arr_base[100];

int foo(void);

void xxx(void)

{

  int iter;

  for (iter = 0; iter < 100; iter++)

    arr_base[iter].y = foo ();

}

/* Access to arr_base[iter].y should be strength reduced.  Depending on

   whether we have an addressing mode of type [base + offset], one of the

   following forms might get chosen:

   -- induction variable with base &arr_base[0].y, the memory access of

      form *iv = ...

   -- induction variable with base 0, the memory access of form

      *(iv + &arr_base[0].y) = ...

   In any case, we should not have any multiplication.  */

/* { dg-final { scan-tree-dump-times " \\* \[^\\n\\r\]*=" 0 "optimized" } } */

/* { dg-final { scan-tree-dump-times "\[^\\n\\r\]*= \\* " 0 "optimized" } } */

/* { dg-final { scan-tree-dump-times "MEM" 1 "optimized" } } */

/* And the original induction variable should be eliminated.  */

/* { dg-final { scan-tree-dump-times "iter" 0 "optimized" } } */

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