From: Devang Patel <dpatel@apple.com>
Date: Tue, 9 Oct 2007 21:31:36 +0000 (+0000)
Subject: Do not walk invalid iterator.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b593898e114370ccabccc2d49889350d1680419a;p=oota-llvm.git

Do not walk invalid iterator.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42812 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/LoopUnswitch.cpp b/lib/Transforms/Scalar/LoopUnswitch.cpp
index 01e4f25d074..0c35b11df2e 100644
--- a/lib/Transforms/Scalar/LoopUnswitch.cpp
+++ b/lib/Transforms/Scalar/LoopUnswitch.cpp
@@ -632,8 +632,8 @@ void LoopUnswitch::ReplaceLoopExternalDFMember(Loop *L, BasicBlock *BB,
   
   DominanceFrontier::DomSetType &DFSet = DFI->second;
   for (DominanceFrontier::DomSetType::iterator DI = DFSet.begin(),
-         DE = DFSet.end(); DI != DE; ++DI) {
-    BasicBlock *B = *DI;
+         DE = DFSet.end(); DI != DE;) {
+    BasicBlock *B = *DI++;
     if (L->contains(B))
       continue;