From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Tue, 21 Aug 2012 20:35:14 +0000 (+0000)
Subject: Don't bind a reference to a dereferenced null pointer (for return value of WeakVH... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=875cc5d629697c16fd24662f7cce21766c3d2e4e;p=oota-llvm.git

Don't bind a reference to a dereferenced null pointer (for return value of WeakVH::operator*).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162309 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index b14a713ce47..0ae7a5151e7 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -738,7 +738,8 @@ DeleteTriviallyDeadInstructions(SmallVectorImpl<WeakVH> &DeadInsts) {
   bool Changed = false;
 
   while (!DeadInsts.empty()) {
-    Instruction *I = dyn_cast_or_null<Instruction>(&*DeadInsts.pop_back_val());
+    Value *V = DeadInsts.pop_back_val();
+    Instruction *I = dyn_cast_or_null<Instruction>(V);
 
     if (I == 0 || !isInstructionTriviallyDead(I))
       continue;