[PATCH][X86] Add peephole for masked rotate amount

[Adam Nemet]

Thanks, Quentin.  It’s r203718.

Adam

On Mar 12, 2014, at 12:54 PM, Quentin Colombet <qcolombet at apple.com> wrote:

> Hi Adam,
> 
> This LGTM.
> 
> Thanks,
> -Quentin
> 
> On Mar 3, 2014, at 5:15 PM, Adam Nemet <anemet at apple.com> wrote:
> 
>> Extend what's currently done for shift because the HW performs this masking
>> implicitly:
>> 
>>   (rotl:i32 x, (and y, 31)) -> (rotl:i32 x, y)
>> 
>> I use the newly factored out multiclass that was only supporting shifts so
>> far.
>> 
>> For testing I extended my testcase for the new rotation idiom.
>> 
>> Adam
>> 
>> <0006-X86-Add-peephole-for-masked-rotate-amount.patch>_______________________________________________
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> 

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