[Bug rtl-optimization/87485] [9 Regression] Compile time hog w/ -O2 -fschedule-insns -fno-guess-branch-probability -fno-isolate-erroneous-paths-dereference -fno-omit-frame-pointer -fno-split-wide-types -fno-tree-ccp -fno-tree-sra

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87485

--- Comment #22 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Eric Botcazou from comment #21)
> Why are we wasting any time or energy on useless PRs like this one involving
> an improbable combination of options on nonsensical code, especially
> -fschedule-insns which is known to be problematic on x86?  We should really
> restrict the PRs to sensible command lines at this point, this is getting
> worse with every release.

Because these testcases uncover real problems in the code base, please see
comment #19. Regarding -fschedule-insns, there was quite some work done some
years ago to enable this option on x86, so by fixing PRs involving
-fchedule-insns, we are inching closer to enabling it by default.