[PATCH] [X86][SSE] Vectorized i64 uniform constant SRA shifts

[Elena Demikhovsky]

I disagree with this approach. You can prepare a separate patch for "shift-right-64bits" optimization.
But you should not use shift-right in SEXT and generate 10 instructions instead of 3.


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D9645

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