https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96750
--- Comment #6 from Matt Bentley ---
Created attachment 49278
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49278=edit
Demonstration of code which doesn't trigger the performance anomaly.
plf_colony_fast.h does not trigger the problem,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96750
--- Comment #5 from Matt Bentley ---
If anyone out there is interested in working on this,
I found the smallest change possible to create the same performance as GCC8-
it is literally eliminating one branch possibility in one function
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96750
--- Comment #4 from Matt Bentley ---
(In reply to Marc Glisse from comment #2)
> (In reply to Martin Liška from comment #1)
> > after:
> > 1794240.0
> >
> > before:
> > 1802710.0
>
> That's less than 1% of difference (with "after" better than
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96750
--- Comment #3 from Martin Liška ---
(In reply to Marc Glisse from comment #2)
> (In reply to Martin Liška from comment #1)
> > after:
> > 1794240.0
> >
> > before:
> > 1802710.0
>
> That's less than 1% of difference (with "after" better than
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96750
--- Comment #2 from Marc Glisse ---
(In reply to Martin Liška from comment #1)
> after:
> 1794240.0
>
> before:
> 1802710.0
That's less than 1% of difference (with "after" better than "before"), not the
10% regression claimed, maybe there is
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96750
Martin Liška changed:
What|Removed |Added
Last reconfirmed||2020-08-24
CC|
