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Commit 7666be70 authored by David Majnemer's avatar David Majnemer
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[PHITransAddr] Don't translate unreachable values 

Unreachable values may use themselves in strange ways due to their
dominance property.  Attempting to translate through them can lead to
infinite recursion, crashing LLVM.  Instead, claim that we weren't able
to translate the value.

This fixes PR23096.

llvm-svn: 238702
parent fc41f63d
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