From a8044084ac421843f6a9ec0755027a600bedf0ea Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Mon, 5 Nov 2007 00:59:10 +0000
Subject: Fix PR1187.

llvm-svn: 43692
---
 llvm/lib/CodeGen/LiveIntervalAnalysis.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'llvm/lib/CodeGen/LiveIntervalAnalysis.cpp')

diff --git a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
index 7819640b6c1..92c26346242 100644
--- a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -466,7 +466,7 @@ bool LiveIntervals::conflictsWithPhysRegDef(const LiveInterval &li,
           continue;
         if (MRegisterInfo::isVirtualRegister(PhysReg))
           PhysReg = vrm.getPhys(PhysReg);
-        if (mri_->regsOverlap(PhysReg, reg))
+        if (PhysReg && mri_->regsOverlap(PhysReg, reg))
           return true;
       }
     }
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