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Commit a54e1a0f authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86] CombineShuffleWithExtract - only require 1 source to be EXTRACT_SUBVECTOR 

We were requiring that both shuffle operands were EXTRACT_SUBVECTORs, but we can relax this to only require one of them to be.

Also, we shouldn't bother attempting this if both operands are from the lowest subvector (or not EXTRACT_SUBVECTOR at all).

llvm-svn: 364644
parent 9dbdfe6b
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