[llvm] r319894 - [InstSimplify] Fold insertelement into undef if index is out of bounds

[Philip Reames via llvm-commits]

FYI, Igor is out of office for the weekend.  Feel free to revert if needed.

Philip


On 12/08/2017 08:51 AM, Michel Dänzer via llvm-commits wrote:
> Hi Igor,
>
>
> On 2017-12-06 03:04 PM, Igor Laevsky via llvm-commits wrote:
>> Author: igor.laevsky
>> Date: Wed Dec  6 06:04:45 2017
>> New Revision: 319894
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=319894&view=rev
>> Log:
>> [InstSimplify] Fold insertelement into undef if index is out of bounds
> This change broke a bunch of piglit OpenGL tests with AMD GPUs using the
> Mesa radeonsi driver. I'm attaching the LLVM IR and disassembly of the
> generated code for the good and bad case of one test.
>
>
>
>
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