From 848548300d91841d07ce34e845a794dae0f9c6a6 Mon Sep 17 00:00:00 2001
From: Jim Grosbach <grosbach@apple.com>
Date: Wed, 2 Jun 2010 15:29:36 +0000
Subject: Not all entries in the range will have an SUnit. Check for that when
 looking for debug information.

llvm-svn: 105324
---
 llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp | 1 +
 1 file changed, 1 insertion(+)

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

diff --git a/llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp b/llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp
index 5eabe655704..42cc44812de 100644
--- a/llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp
+++ b/llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp
@@ -530,6 +530,7 @@ BreakAntiDependencies(const std::vector<SUnit>& SUnits,
           // related to the anti-dependency register, make sure to update that
           // as well.
           const SUnit *SU = MISUnitMap[Q->second->getParent()];
+          if (!SU) continue;
           for (unsigned i = 0, e = SU->DbgInstrList.size() ; i < e ; ++i) {
             MachineInstr *DI = SU->DbgInstrList[i];
             assert (DI->getNumOperands()==3 && DI->getOperand(0).isReg() &&
-- 
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