Merge branch 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly
[dragonfly.git] / contrib / gcc-3.4 / gcc / varray.c
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1/* Virtual array support.
2 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
4 Contributed by Cygnus Solutions.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any later version.
12
13 GCC is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
21 MA 02111-1307, USA. */
22
23#include "config.h"
24#include "errors.h"
25#include "system.h"
26#include "coretypes.h"
27#include "tm.h"
28#include "varray.h"
29#include "ggc.h"
30#include "hashtab.h"
31
32#define VARRAY_HDR_SIZE (sizeof (struct varray_head_tag) - sizeof (varray_data))
33
34#ifdef GATHER_STATISTICS
35
36/* Store infromation about each particular varray. */
37struct varray_descriptor
38{
39 const char *name;
40 int allocated;
41 int created;
42 int resized;
43 int copied;
44};
45
46/* Hashtable mapping varray names to descriptors. */
47static htab_t varray_hash;
48
49/* Hashtable helpers. */
50static hashval_t
51hash_descriptor (const void *p)
52{
53 const struct varray_descriptor *d = p;
54 return htab_hash_pointer (d->name);
55}
56static int
57eq_descriptor (const void *p1, const void *p2)
58{
59 const struct varray_descriptor *d = p1;
60 return d->name == p2;
61}
62
63/* For given name, return descriptor, create new if needed. */
64static struct varray_descriptor *
65varray_descriptor (const char *name)
66{
67 struct varray_descriptor **slot;
68
69 if (!varray_hash)
70 varray_hash = htab_create (10, hash_descriptor, eq_descriptor, NULL);
71
72 slot = (struct varray_descriptor **)
73 htab_find_slot_with_hash (varray_hash, name,
74 htab_hash_pointer (name),
75 1);
76 if (*slot)
77 return *slot;
78 *slot = xcalloc (sizeof (**slot), 1);
79 (*slot)->name = name;
80 return *slot;
81}
82#endif
83
84/* Do not add any more non-GC items here. Please either remove or GC
85 those items that are not GCed. */
86
87static const struct {
88 unsigned char size;
89 bool uses_ggc;
90} element[NUM_VARRAY_DATA] = {
91 { sizeof (char), 1 },
92 { sizeof (unsigned char), 1 },
93 { sizeof (short), 1 },
94 { sizeof (unsigned short), 1 },
95 { sizeof (int), 1 },
96 { sizeof (unsigned int), 1 },
97 { sizeof (long), 1 },
98 { sizeof (unsigned long), 1 },
99 { sizeof (HOST_WIDE_INT), 1 },
100 { sizeof (unsigned HOST_WIDE_INT), 1 },
101 { sizeof (void *), 1 },
102 { sizeof (char *), 1 },
103 { sizeof (struct rtx_def *), 1 },
104 { sizeof (struct rtvec_def *), 1 },
105 { sizeof (union tree_node *), 1 },
106 { sizeof (struct bitmap_head_def *), 1 },
107 { sizeof (struct reg_info_def *), 0 },
108 { sizeof (struct const_equiv_data), 0 },
109 { sizeof (struct basic_block_def *), 0 },
110 { sizeof (struct elt_list *), 1 },
111};
112
113/* Allocate a virtual array with NUM_ELEMENT elements, each of which is
114 ELEMENT_SIZE bytes long, named NAME. Array elements are zeroed. */
115varray_type
116varray_init (size_t num_elements, enum varray_data_enum element_kind,
117 const char *name)
118{
119 size_t data_size = num_elements * element[element_kind].size;
120 varray_type ptr;
121#ifdef GATHER_STATISTICS
122 struct varray_descriptor *desc = varray_descriptor (name);
123
124 desc->created++;
125 desc->allocated += data_size + VARRAY_HDR_SIZE;
126#endif
127 if (element[element_kind].uses_ggc)
128 ptr = ggc_alloc_cleared (VARRAY_HDR_SIZE + data_size);
129 else
130 ptr = xcalloc (VARRAY_HDR_SIZE + data_size, 1);
131
132 ptr->num_elements = num_elements;
133 ptr->elements_used = 0;
134 ptr->type = element_kind;
135 ptr->name = name;
136 return ptr;
137}
138
139/* Grow/shrink the virtual array VA to N elements. Zero any new elements
140 allocated. */
141varray_type
142varray_grow (varray_type va, size_t n)
143{
144 size_t old_elements = va->num_elements;
145 if (n != old_elements)
146 {
147 size_t elem_size = element[va->type].size;
148 size_t old_data_size = old_elements * elem_size;
149 size_t data_size = n * elem_size;
150#ifdef GATHER_STATISTICS
151 struct varray_descriptor *desc = varray_descriptor (va->name);
152 varray_type oldva = va;
153
154 if (data_size > old_data_size)
155 desc->allocated += data_size - old_data_size;
156 desc->resized ++;
157#endif
158
159
160 if (element[va->type].uses_ggc)
161 va = ggc_realloc (va, VARRAY_HDR_SIZE + data_size);
162 else
163 va = xrealloc (va, VARRAY_HDR_SIZE + data_size);
164 va->num_elements = n;
165 if (n > old_elements)
166 memset (&va->data.c[old_data_size], 0, data_size - old_data_size);
167#ifdef GATHER_STATISTICS
168 if (oldva != va)
169 desc->copied++;
170#endif
171 }
172
173 return va;
174}
175
176/* Reset a varray to its original state. */
177void
178varray_clear (varray_type va)
179{
180 size_t data_size = element[va->type].size * va->num_elements;
181
182 memset (va->data.c, 0, data_size);
183 va->elements_used = 0;
184}
185
186/* Check the bounds of a varray access. */
187
188#if defined ENABLE_CHECKING && (GCC_VERSION >= 2007)
189
190void
191varray_check_failed (varray_type va, size_t n, const char *file, int line,
192 const char *function)
193{
194 internal_error ("virtual array %s[%lu]: element %lu out of bounds "
195 "in %s, at %s:%d",
196 va->name, (unsigned long) va->num_elements, (unsigned long) n,
197 function, trim_filename (file), line);
198}
199
200void
201varray_underflow (varray_type va, const char *file, int line,
202 const char *function)
203{
204 internal_error ("underflowed virtual array %s in %s, at %s:%d",
205 va->name, function, trim_filename (file), line);
206}
207
208#endif
209
210/* Output per-varray statistics. */
211#ifdef GATHER_STATISTICS
212struct output_info
213{
214 int count;
215 int size;
216};
217static int
218print_statistics (void **slot, void *b)
219{
220 struct varray_descriptor *d = (struct varray_descriptor *) *slot;
221 struct output_info *i = (struct output_info *) b;
222
223 if (d->allocated)
224 {
225 fprintf (stderr, "%-21s %6d %10d %7d %7d\n", d->name,
226 d->created, d->allocated, d->resized, d->copied);
227 i->size += d->allocated;
228 i->count += d->created;
229 }
230 return 1;
231}
232#endif
233void dump_varray_statistics (void)
234{
235#ifdef GATHER_STATISTICS
236 struct output_info info;
237
238 fprintf (stderr, "\nVARRAY Kind Count Bytes Resized copied\n");
239 fprintf (stderr, "-------------------------------------------------------\n");
240 info.count = 0;
241 info.size = 0;
242 htab_traverse (varray_hash, print_statistics, &info);
243 fprintf (stderr, "-------------------------------------------------------\n");
244 fprintf (stderr, "%-20s %7d %10d\n",
245 "Total", info.count, info.size);
246 fprintf (stderr, "-------------------------------------------------------\n");
247#endif
248}