[Bug target/108489] internal_error adding data fields in a promise_type

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108489

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-linux-gnu
          Component|c++                         |target
           Keywords|                            |GC, ice-on-valid-code

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Add  --param ggc-min-expand=0 --param ggc-min-heapsize=0 gets a different crash
and it only crashes on x86_64-linux-gnu (aarch64-linux-gnu seems to work).
Get a different crash with -g also.

There is some GC issue going on too dealing with <retval> RTL.

The gimple IR at this point:

  _5 = operator new (40);
  _5->_Coro_frame_needs_free = 1;
  _5->_Coro_resume_fn = example;
  _5->_Coro_destroy_fn = example;
  <retval>.value = 0;
  <retval>.m_handle = 0B;
  _5->_Coro_resume_index = 0;
  example (_5);
  return <retval>;

The crash happens while expanding:
  <retval>.value = 0;
(I think)

I am not 100% sure this is valid gimple IR with a call between the assignment
of <retval> and the return.
But it might also be valid and then the bug is the target backend I think.

Also the struct needs the following sized fields with the padding (you can't
even be explict with the padding either):
    int t = 0;
    long t1 = 0;