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-- Netlist cleanup.
-- Copyright (C) 2019 Tristan Gingold
--
-- This file is part of GHDL.
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <gnu.org/licenses>.
with Netlists.Builders; use Netlists.Builders;
package Netlists.Cleanup is
-- Remove instances of module M whose outputs are not connected.
-- Their inputs will be deconnected, which can result in new instances
-- that are also removed.
procedure Remove_Unconnected_Instances (M : Module);
-- Stronger version of Remove_Unconnected_Instances: use a mark and
-- sweep algorithm.
procedure Mark_And_Sweep (M : Module);
-- Reconnection inputs of width 0 (the null inputs) to an Const_X gate.
-- This will make all the null logic unconnected and ready to be cleaned.
procedure Replace_Null_Inputs (Ctxt : Context_Acc; M : Module);
-- Remove Id_Output gates.
procedure Remove_Output_Gates (M : Module);
end Netlists.Cleanup;
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