1  /* PR rtl-optimization/20532 */
       2  
       3  /* { dg-do run } */
       4  /* { dg-options "" } */
       5  /* { dg-options "-march=i386" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
       6  
       7  /* We used to optimize the DImode shift-by-32 to zero because in combine
       8     we turned:
       9  
      10       (v << 31) + (v << 31)
      11  
      12     into:
      13  
      14       (v * (((HOST_WIDE_INT)1 << 31) + ((HOST_WIDE_INT)1 << 31)))
      15  
      16     With a 32-bit HOST_WIDE_INT, the coefficient overflowed to zero.  */
      17  
      18  unsigned long long int badshift(unsigned long long int v)
      19  {
      20          return v << 31 << 1;
      21  }
      22  
      23  extern void abort ();
      24  
      25  int main() {
      26    if (badshift (1) == 0)
      27      abort ();
      28    return 0;
      29  }