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Commit a25f25c3 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86] combineShiftToPMULH - relax from ISA from SSE41 to SSE2 

With improved shuffle combines (in particular canonicalizeShuffleWithBinOps), we can now usefully perform this on any SSE2+ target.

We should be able to remove this entirely and just use DAGCombiner's combineShiftToMULH if we can someday get it to support illegal (pre-widened) types.
parent 3a6ba367
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