gcc/testsuite/gcc.target/arm/pr58041.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Os -mno-unaligned-access" } */
   3 /* { dg-final { scan-assembler "ldrb" } } */
   4 /* { dg-final { scan-assembler "strb" } } */
   5
   6 struct s
   7 {
   8   char u;
   9   long long v[2];
  10 } __attribute__((packed,aligned(1)));
  11
  12 __attribute__((noinline, noclone))
  13 long long foo(struct s *x, int y, long long z)
  14 {
  15   long long a = x->v[y];
  16   x->v[y] = z;
  17   return a;
  18 }
  19
  20 struct s a = {0,{0,0}};
  21 int main()
  22 {
  23   if (foo(&a,0,1) != 0)
  24     __builtin_abort();
  25   if (foo(&a,0,2) != 1)
  26     __builtin_abort();
  27   if (foo(&a,1,1) != 0)
  28     __builtin_abort();
  29   return 0;
  30 }