https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84300
Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-02-09
Ever confirmed|0 |1
--- Comment #1 from Alan Modra <amodra at gmail dot com> ---
The problem occurs in 296r.rtl_dce, where the insn restoring lr after the
__morestack call is deleted. That leads to the mismatch in cfi state.
Well, OK, lr can be trashed in a function that won't return so deleting the lr
restore in itself isn't wrong. But if we want a consistent cfi state that
can't happen without also deleting the instructions saving lr. Which won't
occur due to hacks to stop regrename breaking things.
I think the easiest solution is to make split_stack_return depend on lr (which
of course it does!).
