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Commit 1dcb913b authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][SSE] Remove AssertZext stage from PEXTRW/PEXTRB lowering. NFCI. 

Remove AssertZext and instead add PEXTRW/PEXTRB support to computeKnownBitsForTargetNode to simplify instruction selection.

Differential Revision: https://reviews.llvm.org/D39169

llvm-svn: 316336
parent ce2d749e
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