[PATCH] D12680: [InstCombine] Added vector demanded bits support for SSE4A EXTRQ/INSERTQ instructions

[Simon Pilgrim via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: andreadb, spatel.
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RKSimon set the repository for this revision to rL LLVM.

The SSE4A instructions EXTRQ/INSERTQ only use the lower 64-bits (or less) for many of their input vector operands and all of them have undefined upper 64-bits results.

Repository:
  rL LLVM

http://reviews.llvm.org/D12680

Files:
  lib/Transforms/InstCombine/InstCombineCalls.cpp
  lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
  test/Transforms/InstCombine/x86-sse4a.ll

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