pass dereferenced iterator to dyn_cast

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109098 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp
index 27b07d9..36a245f 100644
--- a/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -949,7 +949,7 @@
        UI != E; ++UI) {
     // Ignore any user that is not a PHI node in BB2.  These can only occur in
     // unreachable blocks, because they would not be dominated by the instr.
-    PHINode *PN = dyn_cast<PHINode>(UI);
+    PHINode *PN = dyn_cast<PHINode>(*UI);
     if (!PN || PN->getParent() != BB2)
       return false;
     PHIUses.push_back(PN);