[PATCH] [X86] tranform insertps to blendps when possible for better performance

[Sanjay Patel]

@chandlerc wrote:

> I think we just need to change the SSE intrinsics to use generic shuffle IR rather than intrinsics. We shouldn't be worrying about 

>  re-combining the LLVM instruction intrinsics in the backend to speed things up. We should insist that code use generic IR as input if 

>  they want this kind of combining.


That's the 2nd suggestion I've gotten to rework the intrinsics in a week, so I guess I can't ignore that angle any longer. :)

So yes, let's put this patch on hold and see what happens when we start sending more generic shuffles down the line.


http://reviews.llvm.org/D7866

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