gcc/testsuite/gcc.target/arm/volatile-bitfields-4.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target arm_eabi } */
   3 /* { dg-options "-O2" } */
   4 /* { dg-final { scan-assembler-times "ldr\[\\t \]+\[^\n\]*,\[\\t \]*\\\[\[^\n\]*\\\]" 2 } } */
   5 /* { dg-final { scan-assembler-times "str\[\\t \]+\[^\n\]*,\[\\t \]*\\\[\[^\n\]*\\\]" 2 } } */
   6 /* { dg-final { scan-assembler-not "strb" } } */
   7
   8 struct thing {
   9   unsigned a: 8;
  10   unsigned b: 8;
  11   unsigned c: 8;
  12   unsigned d: 8;
  13 };
  14
  15 struct thing2 {
  16   volatile unsigned a: 8;
  17   volatile unsigned b: 8;
  18   volatile unsigned c: 8;
  19   volatile unsigned d: 8;
  20 };
  21
  22 void test1(volatile struct thing *t)
  23 {
  24   t->a = 5;
  25 }
  26
  27 void test2(struct thing2 *t)
  28 {
  29   t->a = 5;
  30 }