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Sanjoy Das
a7ff6d36af
Use WeakVH instead of WeakTrackingVH in AliasSetTracker's UnkownInsts
Summary: In cases where an instruction (a call site, say) is RAUW'ed with some other value (this is possible via the `returned` attribute, amongst other things), we want the slot in UnknownInsts to point to the original Instruction we wanted to track, not the value it got replaced by. Fixes PR32587. Reviewers: davide Subscribers: mcrosier, llvm-commits Differential Revision: https://reviews.llvm.org/D32268 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301426 91177308-0d34-0410-b5e6-96231b3b80d8
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