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Commit 4aa876ca authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][SSE] Combine UNPCKL(FHADD,FHADD) -> FHADD for v2f64 shuffles. 

This occurs during UINT_TO_FP v2f64 lowering. 

We can easily generalize this to other horizontal ops (FHSUB, PACKSS, PACKUS) as required - we are doing something similar with PACKUS in lowerV2I64VectorShuffle

llvm-svn: 287676
parent 17b7a575
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