[PATCH] D12731: [InstCombine] CVTPH2PS Vector Demanded Elements + Constant Folding

[Simon Pilgrim via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: majnemer, ab, andreadb.
RKSimon added a subscriber: llvm-commits.
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Improved InstCombine support for CVTPH2PS (F16C half 2 float conversion):

<4 x float> @llvm.x86.vcvtph2ps.128(<8 x i16>) - only uses the bottom 4 i16 elements for the conversion.

Added constant folding support.

Repository:
  rL LLVM

http://reviews.llvm.org/D12731

Files:
  lib/Transforms/InstCombine/InstCombineCalls.cpp
  test/Transforms/InstCombine/x86-f16c.ll

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