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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/* Perform optimizations on tree structure.
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2007, 2008
Free Software Foundation, Inc.
Written by Mark Michell (mark@codesourcery.com).
This file is part of GCC.
GCC 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 3, or (at your option)
any later version.
GCC 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 COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "tree.h"
#include "cp-tree.h"
#include "rtl.h"
#include "insn-config.h"
#include "input.h"
#include "integrate.h"
#include "toplev.h"
#include "varray.h"
#include "params.h"
#include "hashtab.h"
#include "target.h"
#include "debug.h"
#include "tree-inline.h"
#include "flags.h"
#include "langhooks.h"
#include "diagnostic.h"
#include "tree-dump.h"
#include "gimple.h"
/* Prototypes. */
static void update_cloned_parm (tree, tree, bool);
/* CLONED_PARM is a copy of CLONE, generated for a cloned constructor
or destructor. Update it to ensure that the source-position for
the cloned parameter matches that for the original, and that the
debugging generation code will be able to find the original PARM. */
static void
update_cloned_parm (tree parm, tree cloned_parm, bool first)
{
DECL_ABSTRACT_ORIGIN (cloned_parm) = parm;
/* We may have taken its address. */
TREE_ADDRESSABLE (cloned_parm) = TREE_ADDRESSABLE (parm);
/* The definition might have different constness. */
TREE_READONLY (cloned_parm) = TREE_READONLY (parm);
TREE_USED (cloned_parm) = !first || TREE_USED (parm);
/* The name may have changed from the declaration. */
DECL_NAME (cloned_parm) = DECL_NAME (parm);
DECL_SOURCE_LOCATION (cloned_parm) = DECL_SOURCE_LOCATION (parm);
TREE_TYPE (cloned_parm) = TREE_TYPE (parm);
DECL_GIMPLE_REG_P (cloned_parm) = DECL_GIMPLE_REG_P (parm);
}
/* FN is a function in High GIMPLE form that has a complete body and no
CFG. CLONE is a function whose body is to be set to a copy of FN,
mapping argument declarations according to the ARG_MAP splay_tree. */
static void
clone_body (tree clone, tree fn, void *arg_map)
{
copy_body_data id;
gimple_seq new_body;
/* FN must already be in GIMPLE form. */
gcc_assert (gimple_body (fn));
/* Clone the body, as if we were making an inline call. But, remap
the parameters in the callee to the parameters of caller. */
memset (&id, 0, sizeof (id));
id.src_fn = fn;
id.dst_fn = clone;
id.src_cfun = DECL_STRUCT_FUNCTION (fn);
id.decl_map = (struct pointer_map_t *) arg_map;
id.copy_decl = copy_decl_no_change;
id.transform_call_graph_edges = CB_CGE_DUPLICATE;
id.transform_new_cfg = true;
id.transform_return_to_modify = false;
id.transform_lang_insert_block = NULL;
/* We're not inside any EH region. */
id.eh_region = -1;
/* Actually copy the body. */
new_body = remap_gimple_seq (gimple_body (fn), &id);
gimple_set_body (clone, new_body);
}
/* FN is a function that has a complete body. Clone the body as
necessary. Returns nonzero if there's no longer any need to
process the main body. */
bool
maybe_clone_body (tree fn)
{
tree clone;
bool first = true;
/* We only clone constructors and destructors. */
if (!DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (fn)
&& !DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (fn))
return 0;
/* Emit the DWARF1 abstract instance. */
(*debug_hooks->deferred_inline_function) (fn);
/* We know that any clones immediately follow FN in the TYPE_METHODS
list. */
push_to_top_level ();
FOR_EACH_CLONE (clone, fn)
{
tree parm;
tree clone_parm;
int parmno;
struct pointer_map_t *decl_map;
/* Update CLONE's source position information to match FN's. */
DECL_SOURCE_LOCATION (clone) = DECL_SOURCE_LOCATION (fn);
DECL_DECLARED_INLINE_P (clone) = DECL_DECLARED_INLINE_P (fn);
DECL_COMDAT (clone) = DECL_COMDAT (fn);
DECL_WEAK (clone) = DECL_WEAK (fn);
DECL_ONE_ONLY (clone) = DECL_ONE_ONLY (fn);
DECL_SECTION_NAME (clone) = DECL_SECTION_NAME (fn);
DECL_USE_TEMPLATE (clone) = DECL_USE_TEMPLATE (fn);
DECL_EXTERNAL (clone) = DECL_EXTERNAL (fn);
DECL_INTERFACE_KNOWN (clone) = DECL_INTERFACE_KNOWN (fn);
DECL_NOT_REALLY_EXTERN (clone) = DECL_NOT_REALLY_EXTERN (fn);
TREE_PUBLIC (clone) = TREE_PUBLIC (fn);
DECL_VISIBILITY (clone) = DECL_VISIBILITY (fn);
DECL_VISIBILITY_SPECIFIED (clone) = DECL_VISIBILITY_SPECIFIED (fn);
DECL_DLLIMPORT_P (clone) = DECL_DLLIMPORT_P (fn);
/* Adjust the parameter names and locations. */
parm = DECL_ARGUMENTS (fn);
clone_parm = DECL_ARGUMENTS (clone);
/* Update the `this' parameter, which is always first. */
update_cloned_parm (parm, clone_parm, first);
parm = TREE_CHAIN (parm);
clone_parm = TREE_CHAIN (clone_parm);
if (DECL_HAS_IN_CHARGE_PARM_P (fn))
parm = TREE_CHAIN (parm);
if (DECL_HAS_VTT_PARM_P (fn))
parm = TREE_CHAIN (parm);
if (DECL_HAS_VTT_PARM_P (clone))
clone_parm = TREE_CHAIN (clone_parm);
for (; parm;
parm = TREE_CHAIN (parm), clone_parm = TREE_CHAIN (clone_parm))
/* Update this parameter. */
update_cloned_parm (parm, clone_parm, first);
/* Start processing the function. */
start_preparsed_function (clone, NULL_TREE, SF_PRE_PARSED);
/* Remap the parameters. */
decl_map = pointer_map_create ();
for (parmno = 0,
parm = DECL_ARGUMENTS (fn),
clone_parm = DECL_ARGUMENTS (clone);
parm;
++parmno,
parm = TREE_CHAIN (parm))
{
/* Map the in-charge parameter to an appropriate constant. */
if (DECL_HAS_IN_CHARGE_PARM_P (fn) && parmno == 1)
{
tree in_charge;
in_charge = in_charge_arg_for_name (DECL_NAME (clone));
*pointer_map_insert (decl_map, parm) = in_charge;
}
else if (DECL_ARTIFICIAL (parm)
&& DECL_NAME (parm) == vtt_parm_identifier)
{
/* For a subobject constructor or destructor, the next
argument is the VTT parameter. Remap the VTT_PARM
from the CLONE to this parameter. */
if (DECL_HAS_VTT_PARM_P (clone))
{
DECL_ABSTRACT_ORIGIN (clone_parm) = parm;
*pointer_map_insert (decl_map, parm) = clone_parm;
clone_parm = TREE_CHAIN (clone_parm);
}
/* Otherwise, map the VTT parameter to `NULL'. */
else
*pointer_map_insert (decl_map, parm) = null_pointer_node;
}
/* Map other parameters to their equivalents in the cloned
function. */
else
{
*pointer_map_insert (decl_map, parm) = clone_parm;
clone_parm = TREE_CHAIN (clone_parm);
}
}
if (targetm.cxx.cdtor_returns_this ())
{
parm = DECL_RESULT (fn);
clone_parm = DECL_RESULT (clone);
*pointer_map_insert (decl_map, parm) = clone_parm;
}
/* Clone the body. */
clone_body (clone, fn, decl_map);
/* Clean up. */
pointer_map_destroy (decl_map);
/* The clone can throw iff the original function can throw. */
cp_function_chain->can_throw = !TREE_NOTHROW (fn);
/* Now, expand this function into RTL, if appropriate. */
finish_function (0);
BLOCK_ABSTRACT_ORIGIN (DECL_INITIAL (clone)) = DECL_INITIAL (fn);
DECL_SAVED_TREE (clone) = NULL;
expand_or_defer_fn (clone);
first = false;
}
pop_from_top_level ();
/* We don't need to process the original function any further. */
return 1;
}
|
