diff --git a/lib/Analysis/IPA/CallGraph.cpp b/lib/Analysis/IPA/CallGraph.cpp
index dab6867..d9e7242 100644
--- a/lib/Analysis/IPA/CallGraph.cpp
+++ b/lib/Analysis/IPA/CallGraph.cpp
@@ -193,7 +193,7 @@
 }
 
 void CallGraph::destroy() {
-  if(!FunctionMap.size()) {
+  if (!FunctionMap.empty()) {
     for (FunctionMapTy::iterator I = FunctionMap.begin(), E = FunctionMap.end();
         I != E; ++I)
       delete I->second;