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Commit 4f80340f authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][SSE] Add tests for permute(phaddw(phaddw(x,y),phaddw(z,w))) ->... 

[X86][SSE] Add tests for permute(phaddw(phaddw(x,y),phaddw(z,w))) -> phaddw(phaddw(),phaddw()) folds.

We currently only fold if NumEltsPerLane == 4
parent db13f832
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