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];

void xxx(void)

{

  int iter;

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

    arr_base[iter].y = 17 * iter;

}

/* Access to arr_base[iter].y should be strength reduced, i.e., there should

   be no 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" } } */

/* 17 * iter should be strength reduced.  */

/* { dg-final { scan-tree-dump-times " \\* 17" 0 "optimized" } } */

/* { dg-final { scan-tree-dump-times " \\+ 17" 1 "optimized" } } */

/* The induction variable comparison with 99 should be eliminated

   and replaced by comparison of one of the newly created ivs.  */

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

/* { dg-final { scan-tree-dump-times "= 99" 0 "optimized" } } */

/* { dg-final { scan-tree-dump-times "< 100" 0 "optimized" } } */

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