1  /* { dg-do compile } */
       2  /* { dg-options "-fstrict-volatile-bitfields -fdump-rtl-final" } */
       3  
       4  #define PERIPH (*(volatile struct system_periph *)0x81234)
       5  
       6  struct system_periph {
       7    union {
       8      unsigned short WORD;
       9      struct {
      10        unsigned short a:1;
      11        unsigned short b:1;
      12        unsigned short  :5;
      13        unsigned short c:1;
      14        unsigned short  :8;
      15      } BIT;
      16    } ALL;
      17  } __attribute__((aligned(2)));
      18  
      19  void
      20  foo()
      21  {
      22    while (1)
      23      {
      24        PERIPH.ALL.BIT.a = 1;
      25      }
      26  }
      27  /* { dg-final { scan-rtl-dump-times "mem/v(/.)*:HI" 4 "final" } } */