[PATCH] D111350: [LoopFlatten] Mark inner loop as deleted

[Arthur Eubanks via Phabricator via llvm-commits]

aeubanks added a comment.

if we have a loop nest pass in one pass manager delete a loop without invalidating its analyses, then another loop pass in a different pass manager allocate a loop at the same address I think we could still see invalid cached analyses

`LoopAnalysisManagerFunctionProxy::Result::invalidate()` may walk through LoopInfo to get a list of loops to clear analyses, and if we delete a loop, we won't clear the corresponding cached analyses. We can always blow away the entire LoopAnalysisManagerFunctionProxy, but always properly invalidating seems cleaner and there's less chance of things silently going wrong.


Repository:
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  https://reviews.llvm.org/D111350/new/

https://reviews.llvm.org/D111350