+void ExprWithCheck (void (*Func) (ExprDesc*), ExprDesc* Expr);
+/* Call an expression function with checks. */
+
+void MarkedExprWithCheck (void (*Func) (ExprDesc*), ExprDesc* Expr);
+/* Call an expression function with checks and record start and end of the
+ * generated code.
+ */
+
+void PushAddr (const ExprDesc* Expr);