[Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled

[thopre01 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80155

--- Comment #8 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #6 and #7)

>
> The testcase shows hardly profitable PRE which the patches should
> disable (I didn't verify the patches fix the testcase!)

The patch does not help for the testcase either (at least the Cortex-M7 one).

> 
> If you're benchmarking at -O2 can you add -fpredictive-commoning?  As 
> said, the patch removes important loop optimizations from PRE.

Sorry, it does not make any difference (either for the benchmark or the
testcase).