[llvm-dev] CTPOP and zeroes

[ORiordan, Martin via llvm-dev]

Quick question.  The 'ISD::CTPOP' node allows a target to lower the counting of ones in a word to a single instruction.  Our target also has an instruction for counting the zeroes in a word.  Does CTPOP support counting of zeroes as well as ones instead of doing either "CTPOP(INVERT(operand))" or "N-bits - CTPOP(operand)"?

Thanks,

	MartinO

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