search for: ab002087

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2017 Oct 17
3
Possible bug of Alias Analysis?
Hi, I am an out-of-tree user of llvm. I am running into an regression issue against llvm 5.0. The issue was introduced by "[BasicAA] Use MayAlias instead of PartialAlias for fallback."( https://reviews.llvm.org/D34318) I have attached a very simple program to reproduce the issue. The symptom is alias analysis report NoAlias to GVN which cause GVN do wrong optimization. The BasicAA