Another bug fix for empty MBB's
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11716 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocLocal.cpp b/lib/CodeGen/RegAllocLocal.cpp
index 2306346..38e0073 100644
--- a/lib/CodeGen/RegAllocLocal.cpp
+++ b/lib/CodeGen/RegAllocLocal.cpp
@@ -653,7 +653,7 @@
const TargetInstrInfo &TII = TM->getInstrInfo();
MI = MBB.end();
while (MI != MBB.begin() && TII.isTerminatorInstr((--MI)->getOpcode()));
- ++MI;
+ if (MI != MBB.end()) ++MI;
// Spill all physical registers holding virtual registers now.
for (unsigned i = 0, e = RegInfo->getNumRegs(); i != e; ++i)