[PATCH] D88207: [ValueTracking] Check uses of Argument if it is given to isGuaranteedNotToBeUndefOrPoison

[Juneyoung Lee via Phabricator via llvm-commits]

aqjune added inline comments.


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Comment at: llvm/lib/Analysis/ValueTracking.cpp:4889
+    if (programUndefinedIfUndefOrPoison(A, PoisonOnly))
+      return true;
   }
----------------
nikic wrote:
> I would prefer to move the programUndefinedIfUndefOrPoison() call below outside the Instruction check, and  just return false from programUndefinedIfUndefOrPoison()  on non-Instruction/Argument (aka Constant).
Would it make `programUndefinedIfUndefOrPoison()` differentiate non-undef and undef constants?
We'll want to make `programUndefinedIfUndefOrPoison(undef)` return false.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D88207/new/

https://reviews.llvm.org/D88207