https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92007
Maxim Kuvyrkov <mkuvyrkov at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |mkuvyrkov at gcc dot gnu.org
--- Comment #21 from Maxim Kuvyrkov <mkuvyrkov at gcc dot gnu.org> ---
(In reply to iii from comment #18)
> Author: iii
> Date: Mon Oct 28 13:09:54 2019
> New Revision: 277515
>
> URL: https://gcc.gnu.org/viewcvs?rev=277515&root=gcc&view=rev
> Log:
> Move jump threading before reload
Hi Ilya,
This patch regresses performance of SPEC CPU2006's 400.perlbench on
aarch64-linux-gnu -O3 by 5% with most of the slowdown in the hottest function
S_regmatch (this is for gcc-9-branch).
benchmark,symbol,rel_sample,rel_size,results-0:sample,results-1:sample,results-0:size,results-1:size
400.perlbench,perlbench_base.default, 105,100,9281,9761,1281408,1285488
400.perlbench,[.] S_regmatch , 107,100,3641,3910,16460,16460
Is there a way to fix the problem gcc-9-branch in less intrusive way?
