From dfaf0e2c0ef01a6f6fd31f2e099ab63c5a7f7cc0 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Tue, 12 Apr 2011 18:11:28 +0000
Subject: [PATCH] Fix a bug in RegAllocBase::addMBBLiveIns() where a basic
 block could accidentally be skipped.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129373 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/RegAllocBasic.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/CodeGen/RegAllocBasic.cpp b/lib/CodeGen/RegAllocBasic.cpp
index af7da53b89b..dd5049898d9 100644
--- a/lib/CodeGen/RegAllocBasic.cpp
+++ b/lib/CodeGen/RegAllocBasic.cpp
@@ -429,7 +429,7 @@ void RegAllocBase::addMBBLiveIns(MachineFunction *MF) {
         if (!MBB->isLiveIn(PhysReg))
           MBB->addLiveIn(PhysReg);
       } else if (SI.start() > Stop)
-        MBB = Indexes->getMBBFromIndex(SI.start());
+        MBB = Indexes->getMBBFromIndex(SI.start().getPrevIndex());
       if (++MBB == MFE)
         break;
       tie(Start, Stop) = Indexes->getMBBRange(MBB);