[X86] combineConcatVectorOps - combine VSHLI/VSRAI/VSRLI ops
Non-AVX512BW targets failed to concatenate 256-bit shifts back to 512-bits (split during 512-bit shuffle lowering as they don't have v32i16/v64i8 types).
[X86] combineConcatVectorOps - combine VSHLI/VSRAI/VSRLI ops RKSimon on Feb 10 2020, 8:48 AM. Authored by Tags None Subscribers None
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