[PATCH] D80437: [CodeGen] Let computeKnownBits do something sensible for scalable vectors

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

I think we should be able to make computeKnownBits work to some extent, but I guess it's not high priority at the moment.



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Comment at: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:2253
+  APInt DemandedElts;
+  if (!VT.isScalableVector()) {
+    DemandedElts = VT.isVector()
----------------
If we're going to bail out anyway, can we bail out explicitly, instead of waiting for computeKnownBits to bail out?


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https://reviews.llvm.org/D80437