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Commit 80663ee9 authored by Simon Pilgrim's avatar Simon Pilgrim
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[SelectionDAG] Add initial implementation of TargetLowering::SimplifyDemandedVectorElts 

This is mainly a move of simplifyShuffleOperands from DAGCombiner::visitVECTOR_SHUFFLE to create a more general purpose TargetLowering::SimplifyDemandedVectorElts implementation.

Further features can be moved/added in future patches.

Differential Revision: https://reviews.llvm.org/D42896

llvm-svn: 325232
parent 9430c8cd
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