r316015 - Replace use of SmallVector::back + pop_back with pop_back_val

[Erich Keane via cfe-commits]

Author: erichkeane
Date: Tue Oct 17 10:45:21 2017
New Revision: 316015

URL: http://llvm.org/viewvc/llvm-project?rev=316015&view=rev
Log:
Replace use of SmallVector::back + pop_back with pop_back_val

I ran across an instance where the value was being loaded
out via back, then immediately popped.  Since pop_back_val
is more efficient at this (it moves out), replace this 
instance.

Modified:
    cfe/trunk/lib/Sema/AnalysisBasedWarnings.cpp

Modified: cfe/trunk/lib/Sema/AnalysisBasedWarnings.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/AnalysisBasedWarnings.cpp?rev=316015&r1=316014&r2=316015&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/AnalysisBasedWarnings.cpp (original)
+++ cfe/trunk/lib/Sema/AnalysisBasedWarnings.cpp Tue Oct 17 10:45:21 2017
@@ -361,8 +361,7 @@ static bool hasThrowOutNonThrowingFunc(S
   SmallVector<CFGBlock *, 16> Stack;
   Stack.push_back(&BodyCFG->getEntry());
   while (!Stack.empty()) {
-    CFGBlock *CurBlock = Stack.back();
-    Stack.pop_back();
+    CFGBlock *CurBlock = Stack.pop_back_val();
 
     unsigned ID = CurBlock->getBlockID();
     ThrowState CurState = States[ID];