fConversion: Attempt #2 at fixing the MSVC build.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192492 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/IfConversion.cpp b/lib/CodeGen/IfConversion.cpp
index a816e5e..81619d1 100644
--- a/lib/CodeGen/IfConversion.cpp
+++ b/lib/CodeGen/IfConversion.cpp
@@ -1313,8 +1313,8 @@
   // This is everything used+live in BB2 after the duplicated instructions. We
   // can compute this set by simulating liveness backwards from the end of BB2.
   LiveRegUnits DontKill;
-  for (MachineBasicBlock::reverse_instr_iterator I = BBI2->BB->rbegin(),
-       E = MachineBasicBlock::reverse_instr_iterator(&*DI2); I != E; ++I) {
+  for (MachineBasicBlock::reverse_iterator I = BBI2->BB->rbegin(),
+       E = MachineBasicBlock::reverse_iterator(DI2); I != E; ++I) {
     DontKill.StepBackward(*I, *TRI);
   }