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Commit e4d5423d authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][AVX] SimplifyDemandedVectorElts - handle extraction from... 

[X86][AVX] SimplifyDemandedVectorElts - handle extraction from X86ISD::SUBV_BROADCAST source (PR42819)

PR42819 showed an issue that we couldn't handle the case where we demanded a 'sub-sub-vector' of the SUBV_BROADCAST 'sub-vector' source.

This patch recognizes these cases and extracts the sub-sub-vector instead of trying to broadcast to a type smaller than the 'sub-vector' source. 

llvm-svn: 367306
parent b9f8ab2c
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