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/* PR tree-optimization/31866 */

/* { dg-do compile { target alpha*-*-* cris-*-* crisv32-*-* i?86-*-* mmix-*-* powerpc*-*-* rs6000-*-* x86_64-*-* } } */

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

#if defined (__alpha__)

# define REG "$1"

#elif defined (__CRIS__)

# define REG "r10"

#elif defined (__i386__)

# define REG "%eax"

#elif defined (__MMIX__)

# define REG "$8"

#elif defined (__powerpc__) || defined (__PPC__) || defined (__ppc__) \

        || defined (__POWERPC__) || defined (PPC) || defined (_IBMR2)

# define REG "6"

#elif defined (__x86_64__)

# define REG "rax"

#endif

long int

foo (void)

{

  unsigned long int s;

  long int a = (long int) 0;

  register long int r asm (REG) = a;

  asm ("" : "=r" (s) : "0" (r));

  return s;

}