llvm-gcc-4.2/gcc/testsuite/gcc.c-torture/execute/20040308-1.c

/* This used to fail on SPARC with an unaligned memory access.  */

void foo(int n)
{
  struct S {
    int i[n];
    unsigned int b:1;
    int i2;
  } __attribute__ ((packed)) __attribute__ ((aligned (4)));

  struct S s;

  s.i2 = 0;
}

int main(void)
{
  foo(4);
  
  return 0;
}