add the ability to get the llvm function corresponding to a library builtin.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41633 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CodeGen/CodeGenFunction.h b/CodeGen/CodeGenFunction.h
index 3b8d7a2..12c227b 100644
--- a/CodeGen/CodeGenFunction.h
+++ b/CodeGen/CodeGenFunction.h
@@ -325,6 +325,7 @@
 
   RValue EmitCallExpr(const CallExpr *E);
   RValue EmitBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
+  RValue EmitBuiltinLibFuncExpr(unsigned BuiltinID, const CallExpr *E);
 
   llvm::Value *EmitObjCStringLiteral(const ObjCStringLiteral *E);