Subversion Repositories openrisc_2011-10-31

/* The testcase failed due to corrupted alias information.

   During the crossjump analyzing step the mem alias info of the

   st instructions are merged and get copied during basic block

   reordering which leads to an insn with wrong alias info.

   The scheduler afterwards exchanges the mvc and st instructions

   not recognizing the anti dependence.  */

/* { dg-do run } */

/* { dg-options "-O3 -mtune=z990 -fno-inline" } */

extern void exit (int);

extern void abort (void);

int f;

int g;

int h;

int* x  = &f;

int* p1 = &g;

int* p2 = &h;

int

foo(void)

{

  if (*x == 0)

    {

      x = p1;         /* mvc - memory to memory */

      p1 = (int*)0;   /* st  - register to memory */

      return 1;

    }

  if (*x == 5)

    {

      f = 1;

      g = 2;

      p2 = (int*)0;   /* st */

      return 1;

    }

}

int

main (int argc, char** argv)

{

  foo ();

  /* If the scheduler has exchanged the mvc and st instructions,

     x is 0. The expected result is &g.  */

  if (x == &g)

    exit (0);

  else

    abort ();

}