[llvm] [ValueTracking] isNonZero sub of ptr2int's with recursive GEP (PR #68680)

[via llvm-commits]

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@@ -2365,9 +2365,69 @@ static bool isNonZeroAdd(const APInt &DemandedElts, unsigned Depth,
       .isNonZero();
 }
 
+// Check to see if A is both a GEP and is the incoming value for a PHI in the
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bipmis wrote:

Agreed. This is a good improvement. Thanks for the suggestion.

https://github.com/llvm/llvm-project/pull/68680