1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-optimized" } */
       3  extern const unsigned long base;
       4  static inline void wreg(unsigned char val, unsigned long addr) __attribute__((always_inline));
       5  static inline void wreg(unsigned char val, unsigned long addr)
       6  {
       7     *((volatile unsigned char *) (__SIZE_TYPE__) (base + addr)) = val;
       8  }
       9  void wreg_twice(void)
      10  {
      11     wreg(0, 42);
      12     wreg(0, 42);
      13  }
      14  
      15  /* We should not remove the second null character store to (base+42) address. */
      16  /* { dg-final { scan-tree-dump-times " ={v} 0;" 2 "optimized" } }  */