1  /* { dg-do compile } */
       2  /* { dg-options "-O" } */
       3  /* { dg-final { scan-assembler "gs:" } } */
       4  
       5  #define uintptr_t __SIZE_TYPE__
       6  
       7  struct S { int a, b, c; };
       8  
       9  extern struct S __seg_gs s;
      10  
      11  int foo (void)
      12  {
      13    int r;
      14    r = s.c;
      15    return r;
      16  }