Add support for code generation of builtins.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41188 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CodeGen/CodeGenFunction.h b/CodeGen/CodeGenFunction.h
index 314896a..5f78a33 100644
--- a/CodeGen/CodeGenFunction.h
+++ b/CodeGen/CodeGenFunction.h
@@ -352,6 +352,7 @@
    
   RValue EmitCastExpr(const Expr *Op, QualType DestTy);
   RValue EmitCallExpr(const CallExpr *E);
+  RValue EmitBuiltinExpr(unsigned builtinID, const CallExpr *E);
   RValue EmitArraySubscriptExprRV(const ArraySubscriptExpr *E);
 
   // Unary Operators.