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
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/* Callgraph summary data structure.
Copyright (C) 2014-2015 Free Software Foundation, Inc.
Contributed by Martin Liska
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/>. */
#ifndef GCC_SYMBOL_SUMMARY_H
#define GCC_SYMBOL_SUMMARY_H
/* We want to pass just pointer types as argument for function_summary
template class. */
template <class T>
class function_summary
{
private:
function_summary();
};
template <class T>
class GTY((user)) function_summary <T *>
{
public:
/* Default construction takes SYMTAB as an argument. */
function_summary (symbol_table *symtab, bool ggc = false): m_ggc (ggc),
m_map (13, ggc), m_insertion_enabled (true), m_symtab (symtab)
{
#ifdef ENABLE_CHECKING
cgraph_node *node;
FOR_EACH_FUNCTION (node)
{
gcc_checking_assert (node->summary_uid > 0);
}
#endif
m_symtab_insertion_hook =
symtab->add_cgraph_insertion_hook
(function_summary::symtab_insertion, this);
m_symtab_removal_hook =
symtab->add_cgraph_removal_hook
(function_summary::symtab_removal, this);
m_symtab_duplication_hook =
symtab->add_cgraph_duplication_hook
(function_summary::symtab_duplication, this);
}
/* Destructor. */
virtual ~function_summary ()
{
release ();
}
/* Destruction method that can be called for GGT purpose. */
void release ()
{
if (m_symtab_insertion_hook)
m_symtab->remove_cgraph_insertion_hook (m_symtab_insertion_hook);
if (m_symtab_removal_hook)
m_symtab->remove_cgraph_removal_hook (m_symtab_removal_hook);
if (m_symtab_duplication_hook)
m_symtab->remove_cgraph_duplication_hook (m_symtab_duplication_hook);
m_symtab_insertion_hook = NULL;
m_symtab_removal_hook = NULL;
m_symtab_duplication_hook = NULL;
/* Release all summaries. */
typedef typename hash_map <int, T *, summary_hashmap_traits>::iterator map_iterator;
for (map_iterator it = m_map.begin (); it != m_map.end (); ++it)
release ((*it).second);
}
/* Traverses all summarys with a function F called with
ARG as argument. */
template<typename Arg, bool (*f)(const T &, Arg)>
void traverse (Arg a) const
{
m_map.traverse <f> (a);
}
/* Basic implementation of insert operation. */
virtual void insert (cgraph_node *, T *) {}
/* Basic implementation of removal operation. */
virtual void remove (cgraph_node *, T *) {}
/* Basic implementation of duplication operation. */
virtual void duplicate (cgraph_node *, cgraph_node *, T *, T *) {}
/* Allocates new data that are stored within map. */
T* allocate_new ()
{
return m_ggc ? new (ggc_alloc <T> ()) T() : new T () ;
}
/* Release an item that is stored within map. */
void release (T *item)
{
if (m_ggc)
{
item->~T ();
ggc_free (item);
}
else
delete item;
}
/* Getter for summary callgraph node pointer. */
T* get (cgraph_node *node)
{
return get (node->summary_uid);
}
/* Return number of elements handled by data structure. */
size_t elements ()
{
return m_map.elements ();
}
/* Enable insertion hook invocation. */
void enable_insertion_hook ()
{
m_insertion_enabled = true;
}
/* Enable insertion hook invocation. */
void disable_insertion_hook ()
{
m_insertion_enabled = false;
}
/* Symbol insertion hook that is registered to symbol table. */
static void symtab_insertion (cgraph_node *node, void *data)
{
function_summary *summary = (function_summary <T *> *) (data);
if (summary->m_insertion_enabled)
summary->insert (node, summary->get (node));
}
/* Symbol removal hook that is registered to symbol table. */
static void symtab_removal (cgraph_node *node, void *data)
{
gcc_checking_assert (node->summary_uid);
function_summary *summary = (function_summary <T *> *) (data);
int summary_uid = node->summary_uid;
T **v = summary->m_map.get (summary_uid);
if (v)
{
summary->remove (node, *v);
if (!summary->m_ggc)
delete (*v);
summary->m_map.remove (summary_uid);
}
}
/* Symbol duplication hook that is registered to symbol table. */
static void symtab_duplication (cgraph_node *node, cgraph_node *node2,
void *data)
{
function_summary *summary = (function_summary <T *> *) (data);
T **v = summary->m_map.get (node->summary_uid);
gcc_checking_assert (node2->summary_uid > 0);
if (v)
{
/* This load is necessary, because we insert a new value! */
T *data = *v;
T *duplicate = summary->allocate_new ();
summary->m_map.put (node2->summary_uid, duplicate);
summary->duplicate (node, node2, data, duplicate);
}
}
protected:
/* Indication if we use ggc summary. */
bool m_ggc;
private:
typedef int_hash <int, 0, -1> map_hash;
typedef simple_hashmap_traits <map_hash> summary_hashmap_traits;
/* Getter for summary callgraph ID. */
T* get (int uid)
{
bool existed;
T **v = &m_map.get_or_insert (uid, &existed);
if (!existed)
*v = allocate_new ();
return *v;
}
/* Main summary store, where summary ID is used as key. */
hash_map <int, T *, summary_hashmap_traits> m_map;
/* Internal summary insertion hook pointer. */
cgraph_node_hook_list *m_symtab_insertion_hook;
/* Internal summary removal hook pointer. */
cgraph_node_hook_list *m_symtab_removal_hook;
/* Internal summary duplication hook pointer. */
cgraph_2node_hook_list *m_symtab_duplication_hook;
/* Indicates if insertion hook is enabled. */
bool m_insertion_enabled;
/* Symbol table the summary is registered to. */
symbol_table *m_symtab;
template <typename U> friend void gt_ggc_mx (function_summary <U *> * const &);
template <typename U> friend void gt_pch_nx (function_summary <U *> * const &);
template <typename U> friend void gt_pch_nx (function_summary <U *> * const &,
gt_pointer_operator, void *);
};
template <typename T>
void
gt_ggc_mx(function_summary<T *>* const &summary)
{
gcc_checking_assert (summary->m_ggc);
gt_ggc_mx (&summary->m_map);
}
template <typename T>
void
gt_pch_nx(function_summary<T *>* const &summary)
{
gcc_checking_assert (summary->m_ggc);
gt_pch_nx (&summary->m_map);
}
template <typename T>
void
gt_pch_nx(function_summary<T *>* const& summary, gt_pointer_operator op,
void *cookie)
{
gcc_checking_assert (summary->m_ggc);
gt_pch_nx (&summary->m_map, op, cookie);
}
#endif /* GCC_SYMBOL_SUMMARY_H */
|