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

   1 /* Test failed on an architecture that:
   2
   3    - had 16-bit registers,
   4    - passed 64-bit structures in registers,
   5    - only allowed SImode values in even numbered registers.
   6
   7    Before reload, s.i2 in foo() was represented as:
   8
   9         (subreg:SI (reg:DI 0) 2)
  10
  11    find_dummy_reload would return (reg:SI 1) for the subreg reload,
  12    despite that not being a valid register.  */
  13
  14 struct s
  15 {
  16   short i1;
  17   long i2;
  18   short i3;
  19 };
  20
  21 struct s foo (struct s s)
  22 {
  23   s.i2++;
  24   return s;
  25 }
  26
  27 int main ()
  28 {
  29   struct s s = foo ((struct s) { 1000, 2000L, 3000 });
  30   if (s.i1 != 1000 || s.i2 != 2001L || s.i3 != 3000)
  31     abort ();
  32   exit (0);
  33 }