From 8313ef42b711b17cf2c8700a115b3ff44936c4e0 Mon Sep 17 00:00:00 2001
From: Zhou Sheng <zhousheng00@gmail.com>
Date: Mon, 23 Feb 2009 10:14:11 +0000
Subject: [PATCH] Should reset DBI_Prev if DBI_Next == 0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65314 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/InstructionCombining.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index 1a4396bace3..7f2cab96ec5 100644
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -12419,6 +12419,8 @@ static void AddReachableCodeToWorklist(BasicBlock *BB,
           DBI_Prev->eraseFromParent();
         }
         DBI_Prev = DBI_Next;
+      } else {
+        DBI_Prev = 0;
       }
 
       IC.AddToWorkList(Inst);