gcc-4.9/gcc/testsuite/gcc.c-torture/execute/20020215-1.c


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/* Test failed on an architecture that:

   - had 16-bit registers,
   - passed 64-bit structures in registers,
   - only allowed SImode values in even numbered registers.

   Before reload, s.i2 in foo() was represented as:

	(subreg:SI (reg:DI 0) 2)

   find_dummy_reload would return (reg:SI 1) for the subreg reload,
   despite that not being a valid register.  */

struct s
{
  short i1;
  long i2;
  short i3;
};

struct s foo (struct s s)
{
  s.i2++;
  return s;
}

int main ()
{
  struct s s = foo ((struct s) { 1000, 2000L, 3000 });
  if (s.i1 != 1000 || s.i2 != 2001L || s.i3 != 3000)
    abort ();
  exit (0);
}