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

[Eric Christopher via llvm-dev]

I'll try to get this tested today.

On Thu, Mar 10, 2016, 8:29 AM Adam Nemet <anemet at apple.com> wrote:

> Great, thanks very much, Haicheng!
>
> On Mar 10, 2016, at 8:08 AM, Haicheng Wu <haicheng at codeaurora.org> wrote:
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> Thank you, Adam.
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> It passes all the benchmarks I have.
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> Haicheng
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> *From:* anemet at apple.com [mailto:anemet at apple.com <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.)
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> Thanks!
>
> Adam
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> On Mar 7, 2016, at 11:05 PM, Adam Nemet <anemet at apple.com> wrote:
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> On Mar 7, 2016, at 9:43 AM, Adam Nemet <anemet at apple.com> wrote:
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> Hi Haicheng,
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> Sorry about the breakage.  I reverted it in r262839.
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> I will try to reproduce it locally.  Please don’t blow away your
> directories yet in case I need further help.
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> OK, I managed to reproduce this locally.  Should be able to make progress
> from here without further help from you.
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> Adam
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> Thanks,
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> Adam
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> On Mar 7, 2016, at 8:33 AM, Haicheng Wu <haicheng at codeaurora.org> wrote:
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> Hi Adam,
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> 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.
>
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> Best,
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> Haicheng
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