Commit bb13c34c authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][AVX] Ensure we only combine to PSHUFLW/PSHUFHW on supporting targets 

Noticed while investigating combining from concatenated shuffle vectors, we weren't checking that PSHUFLW/PSHUFHW was legal - we were depending on lowering splitting to subvectors.
parent a9b06a2c
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