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

[Quentin Colombet]

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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