[Bug tree-optimization/81053] ICE on valid code at -O3 on x86_64-linux-gnu: in as_a, at is-a.h:192

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81053

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to David Binderman from comment #2)
> More accurately, between 249048 and 249053. 
> 
> Richard, I can see you've produced three of the revisions
> in this band. Would you be able to offer any advice on
> a suitable fix ?

It is caused by r249053.