[PATCH] [X86] canonicalize a v2f64 blendi of 2 registers

[Sanjay Patel]

I don't know how I blanked on the target-specific combine option. Sorry about that. Thanks for the pointers!

Patch updated to include a PerformBLENDICombine() that handles the canonicalization. I also added a comment about the size optimization potential of 'movsd'.


http://reviews.llvm.org/D7777

Files:
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86InstrSSE.td

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