[Bug jit/103562] Jitted code produces incorrect result when returning 3-member struct from internal function

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103562

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #1)
> So there's fishy the [return slot optimization].
RSO should be fine there, that is what you get even with the C code version
from GCC (-O2 -fno-inline):

;; Function deref (deref, funcdef_no=0, decl_uid=1982, cgraph_uid=1,
symbol_order=0)

struct my_struct deref (struct my_struct * ptr)
{
  <bb 2> [local count: 1073741824]:
  <retval> = *ptr_2(D);
  return <retval>;

}

;; Function get_a (get_a, funcdef_no=1, decl_uid=1985, cgraph_uid=2,
symbol_order=1)

long int get_a (struct my_struct * s)
{
  struct my_struct D.1993;
  long int _4;

  <bb 2> [local count: 1073741824]:
  D.1993 = deref (s_2(D)); [return slot optimization]
  _4 = D.1993.a;
  return _4;

}