1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
-- Walk in iirs nodes.
-- Copyright (C) 2009 Tristan Gingold
--
-- 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 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_Ext (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_Signal_Force_Assignment_Statement
| Iir_Kind_Signal_Release_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
| Iir_Kind_Break_Statement
| Iir_Kind_Suspend_State_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_Statement (Stmt : Iir; Cb : Walk_Cb)
return Walk_Status
is
Status : Walk_Status;
begin
case Get_Kind (Stmt) is
when Iir_Kinds_Simple_Concurrent_Statement
| Iir_Kind_Component_Instantiation_Statement
| Iir_Kind_Psl_Default_Clock =>
Status := Cb.all (Stmt);
when Iir_Kind_Block_Statement =>
Status := Cb.all (Stmt);
if Status = Walk_Continue then
Status := Walk_Concurrent_Statements_Chain
(Get_Concurrent_Statement_Chain (Stmt), Cb);
end if;
when Iir_Kind_For_Generate_Statement =>
Status := Cb.all (Stmt);
if Status = Walk_Continue then
Status := Walk_Concurrent_Statements_Chain
(Get_Concurrent_Statement_Chain
(Get_Generate_Statement_Body (Stmt)), Cb);
end if;
when Iir_Kind_If_Generate_Statement =>
declare
Cl : Node;
begin
Status := Cb.all (Stmt);
Cl := Stmt;
while Status = Walk_Continue and then Cl /= Null_Node loop
Status := Walk_Concurrent_Statements_Chain
(Get_Concurrent_Statement_Chain
(Get_Generate_Statement_Body (Cl)), Cb);
Cl := Get_Generate_Else_Clause (Cl);
end loop;
end;
when others =>
Error_Kind ("walk_concurrent_statement", Stmt);
end case;
return Status;
end Walk_Concurrent_Statement;
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
Status := Walk_Concurrent_Statement (El, Cb);
if Status /= Walk_Continue then
return Status;
end if;
El := Get_Chain (El);
end loop;
return Walk_Continue;
end Walk_Concurrent_Statements_Chain;
end Vhdl.Nodes_Walk;
|
