[Bug fortran/79165] [7 Regression] 100% compile-time increase between r244557 and r244598

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79165

--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #2)
> Though ia64 doesn't show the regression which would point at r244591.

Almost unbeliveable, the patch effectively just adds two rarely used patterns.
What happens if you back the mentioned patch out?