[PATCH] D51696: [SelectionDAG] enhance vector demanded elements to look at a vector select condition operand

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: lib/CodeGen/SelectionDAG/TargetLowering.cpp:1539
+    // TODO - add support for constant vselect masks (see IR version of this).
+    APInt UnusedUndef, UnusedZero;
+    if (SimplifyDemandedVectorElts(Op.getOperand(0), DemandedElts, UnusedUndef,
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Can we use UnusedZero to alter the LHS/RHS DemandedElts ?


https://reviews.llvm.org/D51696