[PATCH] D150333: [DAGCombiner][AArch64][VE] Teach BuildUDIV/SDIV to use 2x mul when mulh/mul_lohi are not available.

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

SGTM - probably need to wait for VE review though



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Comment at: llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp:5996
+      unsigned Size = VT.getSizeInBits();
+      EVT WideVT = EVT::getIntegerVT(*DAG.getContext(), Size * 2);
+      if (isOperationLegal(ISD::MUL, WideVT)) {
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We now have a few cases where we're doing this - we already have widenIntegerVectorElementType but for some reason don't have an equivalent widenIntegerScalarType


Repository:
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  https://reviews.llvm.org/D150333/new/

https://reviews.llvm.org/D150333