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/* PR rtl-optimization/20532 */

/* { dg-do run } */

/* { dg-options "" } */

/* { dg-options "-march=i386" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */

/* We used to optimize the DImode shift-by-32 to zero because in combine

   we turned:

     (v << 31) + (v << 31)

   into:

     (v * (((HOST_WIDE_INT)1 << 31) + ((HOST_WIDE_INT)1 << 31)))

   With a 32-bit HOST_WIDE_INT, the coefficient overflowed to zero.  */

unsigned long long int badshift(unsigned long long int v)

{

        return v << 31 << 1;

}

extern void abort ();

int main() {

  if (badshift (1) == 0)

    abort ();

  return 0;

}