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/* { dg-options "-O2" } */

/* { dg-do run } */

#if defined __i386__

#define REG "edi"

#else

#define REG "r14"

#endif

register unsigned long *ds asm(REG);

extern void abort (void);

__attribute__ ((noinline)) void

test (void)

{

  *++ds = 31337;

}

int

main ()

{

  unsigned long stack[2];

  stack[0] = 0;

  stack[1] = 0;

  ds = stack;

  test ();

  if (ds != stack + 1 || *ds != 31337)

    abort ();

  return 0;

}