diff --git a/lib/Serialization/ASTReader.cpp b/lib/Serialization/ASTReader.cpp
index 462c2d3..6a2db82 100644
--- a/lib/Serialization/ASTReader.cpp
+++ b/lib/Serialization/ASTReader.cpp
@@ -2819,13 +2819,12 @@
                                   bool Complain) {
   llvm::SmallPtrSet<Module *, 4> Visited;
   SmallVector<Module *, 4> Stack;
-  Stack.push_back(Mod);  
+  Stack.push_back(Mod);
   while (!Stack.empty()) {
-    Mod = Stack.back();
-    Stack.pop_back();
+    Mod = Stack.pop_back_val();
 
     if (NameVisibility <= Mod->NameVisibility) {
-      // This module already has this level of visibility (or greater), so 
+      // This module already has this level of visibility (or greater), so
       // there is nothing more to do.
       continue;
     }
diff --git a/lib/Serialization/ModuleManager.cpp b/lib/Serialization/ModuleManager.cpp
index 1fc82dd..b90ecc0 100644
--- a/lib/Serialization/ModuleManager.cpp
+++ b/lib/Serialization/ModuleManager.cpp
@@ -332,8 +332,7 @@
         break;
 
       // Pop the next module off the stack.
-      NextModule = State->Stack.back();
-      State->Stack.pop_back();
+      NextModule = State->Stack.pop_back_val();
     } while (true);
   }