search for: sk_extractsubvector

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2017 Feb 08
2
ShuffleKind SK_ExtractSubvector
Hi, I am a little unsure about the semantics of the ShuffleKind SK_ExtractSubvector. It seems a subvector is to be extracted, starting from a given index of a given subtype. First of all, if index 0 is passed, I suppose this would mean a noop? But what about calls like the one made of LoopVectorizer for Instruction::PHI in getInstructionCost(): return TTI.getShuffleCost(Targe...