Use more specific type.

llvm-svn: 208321
diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
index 74ffeec..38e85e6 100644
--- a/clang/lib/CodeGen/CodeGenModule.h
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -976,8 +976,8 @@
 
   llvm::GlobalVariable::LinkageTypes getFunctionLinkage(GlobalDecl GD);
 
-  void setFunctionLinkage(GlobalDecl GD, llvm::GlobalValue *V) {
-    V->setLinkage(getFunctionLinkage(GD));
+  void setFunctionLinkage(GlobalDecl GD, llvm::Function *F) {
+    F->setLinkage(getFunctionLinkage(GD));
   }
 
   /// getVTableLinkage - Return the appropriate linkage for the vtable, VTT,