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-rw-r--r--lib/CodeGen/PHIElimination.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/PHIElimination.cpp b/lib/CodeGen/PHIElimination.cpp
index 91805a93ed..8441e49bbc 100644
--- a/lib/CodeGen/PHIElimination.cpp
+++ b/lib/CodeGen/PHIElimination.cpp
@@ -145,6 +145,10 @@ void PNE::LowerAtomicPHINode(MachineBasicBlock &MBB,
LV->addVirtualRegisterDead(DestReg, PHICopy);
LV->removeVirtualRegistersDead(MPhi);
}
+
+ // Realize that the destination register is defined by the PHI copy now, not
+ // the PHI itself.
+ LV->getVarInfo(DestReg).DefInst = PHICopy;
}
// Adjust the VRegPHIUseCount map to account for the removal of this PHI