[PATCH] D76702: [ValueTracking] improve undef/poison analysis for constants

[Juneyoung Lee via Phabricator via llvm-commits]

aqjune added a comment.

As `D76010`'s review is taking time, I'm fine with shipping this first.



================
Comment at: llvm/lib/Analysis/ValueTracking.cpp:4623
+  if (auto *C = dyn_cast<Constant>(V))
+    return !C->containsUndefElement();
+
----------------
We should check whether the constant or an element of it is not constexpr too.


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  https://reviews.llvm.org/D76702/new/

https://reviews.llvm.org/D76702