Simplify code by using SmallVector's pop_back_val() instead of
separate back() and pop_back() calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71089 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/CloneLoop.cpp b/lib/Transforms/Utils/CloneLoop.cpp
index a0306ff..7e000a1 100644
--- a/lib/Transforms/Utils/CloneLoop.cpp
+++ b/lib/Transforms/Utils/CloneLoop.cpp
@@ -92,8 +92,7 @@
 
   Loop *NewParentLoop = NULL;
   while (!LoopNest.empty()) {
-    Loop *L = LoopNest.back();
-    LoopNest.pop_back();
+    Loop *L = LoopNest.pop_back_val();
     Loop *NewLoop = new Loop();
 
     if (!NewParentLoop)