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Commit 7613a7b5 authored by Simon Pilgrim's avatar Simon Pilgrim
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[SelectionDAG] Add SRA/SHL demanded elts support to ComputeNumSignBits 

Introduce a isConstOrDemandedConstSplat helper function that can recognise a constant splat build vector for at least the demanded elts we care about.

llvm-svn: 316866
parent b56fb4a2
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