From 3a86bcf134d8db14032b77d1d3070e0ec4364645 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.

llvm-svn: 65314
---
 llvm/lib/Transforms/Scalar/InstructionCombining.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
index 1a4396bace35..7f2cab96ec55 100644
--- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/llvm/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);