From 8250d7385a16e8d586f608b3040eb6738bbf8e55 Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Tue, 6 Mar 2012 02:00:52 +0000
Subject: [PATCH] Avoid finalizeBundles infinite looping.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152089 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/MachineInstrBundle.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/CodeGen/MachineInstrBundle.cpp b/lib/CodeGen/MachineInstrBundle.cpp
index d1f2df94b5b..73489a7160b 100644
--- a/lib/CodeGen/MachineInstrBundle.cpp
+++ b/lib/CodeGen/MachineInstrBundle.cpp
@@ -229,6 +229,8 @@ bool llvm::finalizeBundles(MachineFunction &MF) {
            "First instr cannot be inside bundle before finalization!");
 
     MachineBasicBlock::instr_iterator MIE = MBB.instr_end();
+    if (MII == MIE)
+      continue;
     for (++MII; MII != MIE; ) {
       if (!MII->isInsideBundle())
         ++MII;
-- 
2.34.1