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-rw-r--r--lib/CodeGen/LiveIntervalAnalysis.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 8746bf9086..c52156ad20 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -671,6 +671,9 @@ void LiveIntervals::computeIntervals() {
for (MachineFunction::iterator MBBI = mf_->begin(), E = mf_->end();
MBBI != E; ++MBBI) {
MachineBasicBlock *MBB = MBBI;
+ if (MBB->empty())
+ continue;
+
// Track the index of the current machine instr.
SlotIndex MIIndex = getMBBStartIdx(MBB);
DEBUG(dbgs() << MBB->getName() << ":\n");