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Commit 4c994ee4 authored by Matthias Braun's avatar Matthias Braun
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ScheduleDAGInstrs: Fix memory corruption 

We have to modify V2SU before inserting new elements into the
CurrentVRegDefs set because that may move V2SU in memory invalidating
the reference.

llvm-svn: 270644
parent 1ac739b2
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