[llvm] [LAA] Make Ptr argument optional in isNoWrap. (PR #127410)

[Ramkumar Ramachandra via llvm-commits]

================
@@ -868,6 +878,9 @@ static bool isNoWrap(PredicatedScalarEvolution &PSE, const SCEVAddRecExpr *AR,
       return true;
   }
 
+  if (!Ptr)
+    return false;
+
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artagnon wrote:

Hmpf, if Ptr is nullptr, Assume is ignored: perhaps it makes sense to add a comment about this in the function's doc?

https://github.com/llvm/llvm-project/pull/127410