[PATCH] [X86] Break false dependencies before partial register updates when the source operand is in memory

[Michael Kuperstein]

Thanks a lot for the review, Scott.

ROUNDS* don't currently have m_Int variants defined. 
I thought RSQRTSS and SQRTSS don't have them defined either, but apparently they do and I just missed them, I'll add them, thanks!

Regarding SQRTSD, I don't see why the r variants weren't on the original list. I'll add all variants.


http://reviews.llvm.org/D6620

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