[Bug tree-optimization/84111] [8 Regression] Compile time hog w/ -O2

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84111

--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
(In reply to Arseny Solokha from comment #0)
> % timeout 5 gcc-8.0.0-alpha20180128 -O2 -c utfcfeh4.c
> zsh: exit 124   timeout 5 gcc-8.0.0-alpha20180128 -O2 -c utfcfeh4.c

gcc-8.0.0-alpha20180128 is also affected.