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|
-- Walk in iirs nodes.
-- Copyright (C) 2009 Tristan Gingold
--
-- GHDL 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, or (at your option) any later
-- version.
--
-- GHDL 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 GCC; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with Vhdl.Utils; use Vhdl.Utils;
with Vhdl.Errors; use Vhdl.Errors;
package body Vhdl.Nodes_Walk is
function Walk_Chain (Chain : Iir; Cb : Walk_Cb) return Walk_Status
is
El : Iir;
Status : Walk_Status := Walk_Continue;
begin
El := Chain;
while El /= Null_Iir loop
Status := Cb.all (El);
exit when Status /= Walk_Continue;
El := Get_Chain (El);
end loop;
return Status;
end Walk_Chain;
function Walk_Sequential_Stmt (Stmt : Iir; Cb : Walk_Cb) return Walk_Status;
function Walk_Sequential_Stmt_Chain (Chain : Iir; Cb : Walk_Cb)
return Walk_Status
is
El : Iir;
Status : Walk_Status := Walk_Continue;
begin
El := Chain;
while El /= Null_Iir loop
Status := Cb.all (El);
exit when Status /= Walk_Continue;
Status := Walk_Sequential_Stmt (El, Cb);
exit when Status /= Walk_Continue;
El := Get_Chain (El);
end loop;
return Status;
end Walk_Sequential_Stmt_Chain;
function Walk_Sequential_Stmt (Stmt : Iir; Cb : Walk_Cb) return Walk_Status
is
Status : Walk_Status := Walk_Continue;
Chain : Iir;
begin
case Iir_Kinds_Sequential_Statement (Get_Kind (Stmt)) is
when Iir_Kind_Simple_Signal_Assignment_Statement
| Iir_Kind_Conditional_Signal_Assignment_Statement
| Iir_Kind_Selected_Waveform_Assignment_Statement
| Iir_Kind_Null_Statement
| Iir_Kind_Assertion_Statement
| Iir_Kind_Report_Statement
| Iir_Kind_Wait_Statement
| Iir_Kind_Return_Statement
| Iir_Kind_Procedure_Call_Statement
| Iir_Kind_Next_Statement
| Iir_Kind_Exit_Statement
| Iir_Kind_Variable_Assignment_Statement
| Iir_Kind_Conditional_Variable_Assignment_Statement =>
null;
when Iir_Kind_For_Loop_Statement
| Iir_Kind_While_Loop_Statement =>
Status := Walk_Sequential_Stmt_Chain
(Get_Sequential_Statement_Chain (Stmt), Cb);
when Iir_Kind_Case_Statement =>
Chain := Get_Case_Statement_Alternative_Chain (Stmt);
while Chain /= Null_Iir loop
Status := Walk_Sequential_Stmt_Chain
(Get_Associated_Chain (Chain), Cb);
exit when Status /= Walk_Continue;
Chain := Get_Chain (Chain);
end loop;
when Iir_Kind_If_Statement =>
Chain := Stmt;
while Chain /= Null_Iir loop
Status := Walk_Sequential_Stmt_Chain
(Get_Sequential_Statement_Chain (Chain), Cb);
exit when Status /= Walk_Continue;
Chain := Get_Else_Clause (Chain);
end loop;
end case;
return Status;
end Walk_Sequential_Stmt;
function Walk_Assignment_Target (Target : Iir; Cb : Walk_Cb)
return Walk_Status
is
Targ : constant Iir := Strip_Reference_Name (Target);
Chain : Iir;
Status : Walk_Status := Walk_Continue;
begin
case Get_Kind (Targ) is
when Iir_Kind_Aggregate =>
Chain := Get_Association_Choices_Chain (Targ);
while Chain /= Null_Iir loop
Status :=
Walk_Assignment_Target (Get_Associated_Expr (Chain), Cb);
exit when Status /= Walk_Continue;
Chain := Get_Chain (Chain);
end loop;
when others =>
Status := Cb.all (Targ);
end case;
return Status;
end Walk_Assignment_Target;
function Walk_Design_Units (Parent : Iir; Cb : Walk_Cb) return Walk_Status
is
El : Iir;
Status : Walk_Status := Walk_Continue;
begin
case Get_Kind (Parent) is
when Iir_Kind_Library_Declaration =>
El := Get_Design_File_Chain (Parent);
while Is_Valid (El) loop
Status := Walk_Design_Units (El, Cb);
exit when Status /= Walk_Continue;
El := Get_Chain (El);
end loop;
return Status;
when Iir_Kind_Design_File =>
El := Get_First_Design_Unit (Parent);
while Is_Valid (El) loop
Status := Cb.all (El);
exit when Status /= Walk_Continue;
El := Get_Chain (El);
end loop;
return Status;
when others =>
Error_Kind ("walk_library_units", Parent);
end case;
end Walk_Design_Units;
function Walk_Concurrent_Statements_Chain (Chain : Iir; Cb : Walk_Cb)
return Walk_Status
is
Status : Walk_Status;
El : Iir;
begin
El := Chain;
while Is_Valid (El) loop
case Iir_Kinds_Concurrent_Statement (Get_Kind (El)) is
when Iir_Kinds_Simple_Concurrent_Statement
| Iir_Kind_Component_Instantiation_Statement =>
return Cb.all (El);
when Iir_Kind_Block_Statement =>
Status := Cb.all (El);
if Status /= Walk_Continue then
return Status;
end if;
return Walk_Concurrent_Statements_Chain
(Get_Concurrent_Statement_Chain (El), Cb);
when others =>
Error_Kind ("walk_concurrent_statements_chain", El);
end case;
El := Get_Chain (El);
end loop;
return Walk_Continue;
end Walk_Concurrent_Statements_Chain;
end Vhdl.Nodes_Walk;
|
