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Commit 17673ae0 authored by Jon Roelofs's avatar Jon Roelofs
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[DAG] Fix PR45049: LegalizeTypes crash 

Sometimes LegalizeTypes knows about common subexpressions before SelectionDAG
does, leading to accidental SDValue removal before its reference count was
truly zero.

Fixes: https://bugs.llvm.org/show_bug.cgi?id=45049

https://reviews.llvm.org/D76994
parent 9195b019
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