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
|
{
Copyright (c) 1998-2002 by Florian Klaempfl
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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit ncgnstmm;
{$i fpcdefs.inc}
interface
uses
globtype,cgbase,cpuinfo,cpubase,
node,ncgmem;
type
tcgnestloadparentfpnode = class(tcgloadparentfpnode)
function pass_typecheck: tnode; override;
function pass_1: tnode; override;
procedure pass_generate_code;override;
end;
implementation
uses
systems,
cutils,cclasses,verbose,globals,constexp,
symconst,symdef,symsym,symtable,defutil,procdefutil,pparautl,symcreat,
aasmbase,aasmtai,aasmdata,
procinfo,pass_2,parabase,paramgr,
pass_1,ncnv,nmem,nld,ncon,nadd,nutils,
cgutils,cgobj,hlcgobj,
tgobj,ncgutil,objcgutl
;
{*****************************************************************************
TCGLOADPARENTFPNODE
*****************************************************************************}
function tcgnestloadparentfpnode.pass_typecheck: tnode;
var
hsym : tparavarsym;
currpi,
nextpi : tprocinfo;
begin
result:=inherited;
if assigned(result) then
exit;
currpi:=current_procinfo.parent;
while (currpi.procdef.parast.symtablelevel>=parentpd.parast.symtablelevel) do
begin
if not assigned(currpi.procdef.parentfpstruct) then
build_parentfpstruct(currpi.procdef);
currpi:=currpi.parent;
end;
{ mark all parent parentfp parameters for inclusion in the struct that
holds all locals accessed from nested routines }
currpi:=current_procinfo.parent;
nextpi:=currpi.parent;
while (currpi.procdef.parast.symtablelevel>parentpd.parast.symtablelevel) do
begin
hsym:=tparavarsym(currpi.procdef.parast.Find('parentfp'));
maybe_add_sym_to_parentfpstruct(currpi.procdef,hsym,nextpi.procdef.parentfpstructptrtype,false);
currpi:=nextpi;
nextpi:=nextpi.parent;
end;
end;
function tcgnestloadparentfpnode.pass_1: tnode;
var
fsym : tfieldvarsym;
hsym : tparavarsym;
currpi : tprocinfo;
useparentfppara : boolean;
begin
result:=nil;
{ if the current routine does not call a nested routine, or if that
nested routine does nothing for which it needs the nestedfp pointer
of the current routine (and hence it has not been moved into the
nestedfp struct), get the original nestedfp parameter }
useparentfppara:=not assigned(current_procinfo.procdef.parentfpstruct);
hsym:=tparavarsym(current_procinfo.procdef.parast.Find('parentfp'));
if current_procinfo.procdef.parast.symtablelevel>parentpd.parast.symtablelevel then
useparentfppara:=
useparentfppara or
(find_sym_in_parentfpstruct(current_procinfo.procdef,hsym)=nil);
if useparentfppara then
begin
result:=cloadnode.create(hsym,hsym.owner);
currpi:=current_procinfo.parent;
end
else
begin
result:=caddrnode.create_internal(cloadnode.create(current_procinfo.procdef.parentfpstruct,current_procinfo.procdef.parentfpstruct.owner));
include(taddrnode(result).addrnodeflags,anf_typedaddr);
currpi:=current_procinfo;
end;
{ follow the chain of parentfpstructs until we arrive at the one we
need }
while (currpi.procdef.parast.symtablelevel>parentpd.parast.symtablelevel) do
begin
hsym:=tparavarsym(currpi.procdef.parast.Find('parentfp'));
fsym:=tfieldvarsym(find_sym_in_parentfpstruct(currpi.procdef,hsym));
if not assigned(fsym) then
internalerror(2011060405);
result:=csubscriptnode.create(fsym,cderefnode.create(result));
currpi:=currpi.parent;
end;
end;
procedure tcgnestloadparentfpnode.pass_generate_code;
begin
{ should be handled in pass 1 }
internalerror(2011060202);
end;
begin
cloadparentfpnode:=tcgnestloadparentfpnode;
end.
|
