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Commit e6dc2c8c authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][SSE] combineTargetShuffle - rearrange shuffle(hop,hop) matching to delay... 

[X86][SSE] combineTargetShuffle - rearrange shuffle(hop,hop) matching to delay shuffle mask manipulation. NFC.

Check that we're shuffling hadd/pack ops first before altering shuffle masks.

First step towards adding extra functionality, plus it avoids costly shuffle mask manipulation if not necessary.
parent 5f104a80
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