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/* { dg-do run } */

/* { dg-options "-std=gnu99 -Os" } */

/* This is a massively distilled test case based upon

   mm/memory.c:unmap_vmas() in the Linux kernel when compiled

   on sparc64 for SMP which uses a global register as the

   base of the per-cpu variable area.

   Because of a bug in global register handling in the dataflow

   code, the loop-invariant pass would move 'expression(regval)'

   outside of the loop.  */

extern void exit(int);

extern void abort(void);

register unsigned long regval __asm__("g6");

extern void cond_resched(void);

unsigned int var;

static unsigned long expression(unsigned long v)

{

  unsigned long ret;

  __asm__("" : "=r" (ret) : "0" (0));

  return ret + v;

}

void func(unsigned long *pp)

{

  int i;

  for (i = 0; i < 56; i++) {

    cond_resched();

    *pp = expression(regval);

  }

}

void __attribute__((noinline)) cond_resched(void)

{

        regval++;

}

int main(void)

{

  unsigned long val;

  regval = 100;

  func(&val);

  if (val != 156)

    abort();

  exit(0);

}