https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85666
--- Comment #9 from Hans-Peter Nilsson <hp at gcc dot gnu.org> --- (In reply to Wilco from comment #8) > I don't think that comment is accurate. Of course it isn't accurate *now*, but it explains why the code looks as it is. I see the "phase-computing" code in expand_used_vars was added in 2004, but the port is from 2001. > The failure happens in cfgexpand > before any RTL has been generated, so leaf_function_p must not be called > this early. If starting_frame_offset doesn't remain constant things can go > badly wrong. Correct. > The easiest fix is to always allocate an extra stack slot with exceptions > and then avoid generating extra code in the prolog/epilog if it happens to > be a leaf function. Easiest perhaps, but far from right. Don't worry about it. It's just a pity leaf_function_p is so useless, but there are other ways.
