[llvm-dev] Reversion of rL292621 caused about 7% performance regressions on Cortex-M

[Evgeny Astigeevich via llvm-dev]

Hi Wei,

I checked the patch. It works. The regressions are fixed. I will have results of other benchmarks tomorrow.
Thank you very much for the quick resolution.

Kind regards,
Evgeny Astigeevich
Senior Compiler Engineer
Compilation Tools
ARM

> -----Original Message-----
> From: Wei Mi [mailto:wmi at google.com]
> Sent: Saturday, January 28, 2017 1:34 AM
> To: Evgeny Astigeevich
> Cc: llvm-dev; nd
> Subject: Re: Reversion of rL292621 caused about 7% performance
> regressions on Cortex-M
> 
> Quentin recommited the patch with the fix at rL293353.
> 
> Thanks,
> Wei.
> 
> 
> On Fri, Jan 27, 2017 at 1:31 PM, Wei Mi <wmi at google.com> wrote:
> > Hi Evgeny,
> >
> > Quentin and Matthias found it was a problem about subreg live range
> > update and will push a fix soon
> > (http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-
> 20170123/424126.html).
> >
> > Thanks,
> > Wei.