[llvm] [LoopFusion] Fix false-positive dependency blocking fusion of idempot… (PR #206401)

[Ehsan Amiri via llvm-commits]

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amehsan wrote:

looks like you are trying to solve a AA problem inside loop fusion.  DependenceAnalysis relies on AA framework. If you see a MayAlias result that is provably NoAlias, the issue needs to be fixed in AA.

https://github.com/llvm/llvm-project/pull/206401