[llvm] [BasicAA] Consider 'nneg' flag when comparing CastedValues (PR #94129)

[Nikita Popov via llvm-commits]

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@@ -450,7 +473,8 @@ static LinearExpression GetLinearExpression(
 
   if (isa<ZExtInst>(Val.V))
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nikic wrote:

dyn_cast here instead.

https://github.com/llvm/llvm-project/pull/94129