1  /* { dg-do run } */
       2  /* { dg-require-effective-target ia32 } */
       3  /* { dg-options "-O2 -mpreferred-stack-boundary=2 -march=i686 -frename-registers" } */
       4  
       5  extern void abort (void) __attribute__((noreturn));
       6  
       7  struct wrapper {
       8  union setconflict
       9  {
      10    short a[20];
      11    int b[10];
      12  } a;
      13  };
      14  
      15  int
      16  main ()
      17  {
      18    int sum = 0;
      19    {
      20      struct wrapper a;
      21      short *c;
      22      c = a.a.a;
      23      asm ("": "=r" (c):"0" (c));
      24      *c = 0;
      25      asm ("": "=r" (c):"0" (c));
      26      sum += *c;
      27    }
      28    {
      29      struct wrapper a;
      30      int *c;
      31      c = a.a.b;
      32      asm ("": "=r" (c):"0" (c));
      33      *c = 1;
      34      asm ("": "=r" (c):"0" (c));
      35      sum += *c;
      36    }
      37  
      38    if (sum != 1)
      39      abort();
      40    return 0;
      41  }
      42