[llvm-dev] Regression in SPEC2006/gcc caused by LoopLoadElimination

[Haicheng Wu via llvm-dev]

Thank you, Adam.

 

It passes all the benchmarks I have.

 

Haicheng

 

From: anemet at apple.com [mailto:anemet at apple.com] 
Sent: Wednesday, March 09, 2016 7:17 PM
To: Haicheng Wu; Eric Christopher; Benjamin Kramer
Cc: llvm-dev
Subject: Re: Regression in SPEC2006/gcc caused by LoopLoadElimination

 

I’ve committed the fix in r263058.  Haicheng, Eric/Benjamin, can you guys please give it a test with your codebase.  (You need to enable the pass with -mllvm -enable-loop-load-elim.)

 

Thanks!

Adam

 

On Mar 7, 2016, at 11:05 PM, Adam Nemet <anemet at apple.com <mailto:anemet at apple.com> > wrote:

 

 

On Mar 7, 2016, at 9:43 AM, Adam Nemet <anemet at apple.com <mailto:anemet at apple.com> > wrote:

 

Hi Haicheng,

 

Sorry about the breakage.  I reverted it in r262839.

 

I will try to reproduce it locally.  Please don’t blow away your directories yet in case I need further help.

 

OK, I managed to reproduce this locally.  Should be able to make progress from here without further help from you.

 

Adam





Thanks,

Adam

 

On Mar 7, 2016, at 8:33 AM, Haicheng Wu <haicheng at codeaurora.org <mailto:haicheng at codeaurora.org> > wrote:

 

Hi Adam,

 

I find LoopLoadElimination (r262250) causes SPEC2006/gcc generate wrong result (166.s) in AArch64 when running with *ref* data set.  The error happens when I use either “-Ofast -flto -fuse-ld=gold” or “-O3 -fno-strict-aliasing”.  Please let me know if you need more information.

 

Best,

 

Haicheng

 

 

 

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