[C++11] Add 'override' keyword to virtual methods that override their base class.

llvm-svn: 202953
diff --git a/llvm/lib/Transforms/IPO/ExtractGV.cpp b/llvm/lib/Transforms/IPO/ExtractGV.cpp
index 50fb3e6..4211f12 100644
--- a/llvm/lib/Transforms/IPO/ExtractGV.cpp
+++ b/llvm/lib/Transforms/IPO/ExtractGV.cpp
@@ -68,7 +68,7 @@
     explicit GVExtractorPass(std::vector<GlobalValue*>& GVs, bool deleteS = true)
       : ModulePass(ID), Named(GVs.begin(), GVs.end()), deleteStuff(deleteS) {}
 
-    bool runOnModule(Module &M) {
+    bool runOnModule(Module &M) override {
       // Visit the global inline asm.
       if (!deleteStuff)
         M.setModuleInlineAsm("");