ObjCARC: Remove implicit ilist iterator conversions, NFC

llvm-svn: 250756
diff --git a/llvm/lib/Transforms/ObjCARC/DependencyAnalysis.cpp b/llvm/lib/Transforms/ObjCARC/DependencyAnalysis.cpp
index 0c6b16d..9d78e5a 100644
--- a/llvm/lib/Transforms/ObjCARC/DependencyAnalysis.cpp
+++ b/llvm/lib/Transforms/ObjCARC/DependencyAnalysis.cpp
@@ -226,7 +226,7 @@
                                 SmallPtrSetImpl<Instruction *> &DependingInsts,
                                 SmallPtrSetImpl<const BasicBlock *> &Visited,
                                 ProvenanceAnalysis &PA) {
-  BasicBlock::iterator StartPos = StartInst;
+  BasicBlock::iterator StartPos = StartInst->getIterator();
 
   SmallVector<std::pair<BasicBlock *, BasicBlock::iterator>, 4> Worklist;
   Worklist.push_back(std::make_pair(StartBB, StartPos));
@@ -252,7 +252,7 @@
         break;
       }
 
-      Instruction *Inst = --LocalStartPos;
+      Instruction *Inst = &*--LocalStartPos;
       if (Depends(Flavor, Inst, Arg, PA)) {
         DependingInsts.insert(Inst);
         break;