From b4bd022731b28a80f59818870cc7df5d4771d793 Mon Sep 17 00:00:00 2001
From: Cameron Zwarich <zwarich@apple.com>
Date: Sat, 23 Feb 2013 04:49:22 +0000
Subject: [PATCH] Fix a bug with the LiveIntervals updating in the two-address
 pass found by running ASCI_Purple/SMG2000 in the test-suite.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175957 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/TwoAddressInstructionPass.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index cbe07db3fcb..aca85b2aa17 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -370,7 +370,7 @@ static bool isPlainlyKilled(MachineInstr *MI, unsigned Reg,
     SlotIndex useIdx = LIS->getInstructionIndex(MI);
     LiveInterval::const_iterator I = LI.find(useIdx);
     assert(I != LI.end() && "Reg must be live-in to use.");
-    return SlotIndex::isSameInstr(I->end, useIdx);
+    return !I->end.isBlock() && SlotIndex::isSameInstr(I->end, useIdx);
   }
 
   return MI->killsRegister(Reg);