1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-rtl-cse1" } */
       3  
       4  extern void abort(void);
       5  
       6  typedef unsigned int uint32;
       7  typedef unsigned long long uint64;
       8  
       9  typedef union {
      10    uint32 i32;
      11    uint64 i64;
      12  } u64;
      13  
      14  void foo(void)
      15  {
      16    u64 data;
      17    data.i64 = 1;
      18    if (data.i32 != 1)
      19      abort ();
      20  }
      21  
      22  /* { dg-final { scan-rtl-dump-not "abort" "cse1" { target i?86-*-* x86_64-*-* } } } */