1  /* { dg-do run { target i?86-*-* x86_64-*-* } } */
       2  /* { dg-options "-O -fgcse -fno-split-wide-types" } */
       3  
       4  extern void abort(void);
       5  
       6  typedef unsigned short int uint16_t;
       7  typedef unsigned int uint32_t;
       8  typedef unsigned long long uint64_t;
       9  
      10  typedef struct
      11  {
      12    uint16_t thread;
      13    uint16_t phase;
      14  } s32;
      15  
      16  typedef union
      17  {
      18    uint32_t i;
      19    s32 s;
      20  } u32;
      21  
      22  typedef union
      23  {
      24    uint64_t i;
      25    u32 u;
      26  } u64;
      27  
      28  static __attribute__((noinline))
      29  void foo(int val)
      30  {
      31    u64 data;
      32    uint32_t thread;
      33  
      34    data.u.i = 0x10000L;
      35    thread = data.u.s.thread;
      36    if (val)
      37      abort ();
      38    if (thread)
      39      abort ();
      40  }
      41  
      42  int main(void)
      43  {
      44    foo (0);
      45    return 0;
      46  }