Simon Pilgrim ce356e1546 [DAG] Add BuildVectorSDNode::getRepeatedSequence helper to recognise multi-element splat patterns ...

Replace the X86 specific isSplatZeroExtended helper with a generic BuildVectorSDNode method.

I've just used this to simplify the X86ISD::BROADCASTM lowering so far (and remove isSplatZeroExtended), but we should be able to use this in more places to lower to complex broadcast patterns.

Differential Revision: https://reviews.llvm.org/D87930

2020-10-24 12:23:09 +01:00

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