1 /* Virtual array support.
2 Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
3 Contributed by Cygnus Solutions.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GCC is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
20 MA 02111-1307, USA. */
28 #define VARRAY_HDR_SIZE (sizeof (struct varray_head_tag) - sizeof (varray_data))
30 static const size_t element_size[NUM_VARRAY_DATA] = {
32 sizeof (unsigned char),
34 sizeof (unsigned short),
36 sizeof (unsigned int),
38 sizeof (unsigned long),
39 sizeof (HOST_WIDE_INT),
40 sizeof (unsigned HOST_WIDE_INT),
43 sizeof (struct rtx_def *),
44 sizeof (struct rtvec_def *),
45 sizeof (union tree_node *),
46 sizeof (struct bitmap_head_def *),
47 sizeof (struct reg_info_def *),
48 sizeof (struct const_equiv_data),
49 sizeof (struct basic_block_def *),
50 sizeof (struct elt_list *)
53 static const int uses_ggc[NUM_VARRAY_DATA] = {
54 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* unsigned HOST_WIDE_INT */
56 1, 1, 1, 1, 1, /* bitmap_head_def */
60 /* Allocate a virtual array with NUM_ELEMENT elements, each of which is
61 ELEMENT_SIZE bytes long, named NAME. Array elements are zeroed. */
63 varray_init (num_elements, element_kind, name)
65 enum varray_data_enum element_kind;
68 size_t data_size = num_elements * element_size[element_kind];
70 if (uses_ggc [element_kind])
71 ptr = (varray_type) ggc_alloc_cleared (VARRAY_HDR_SIZE + data_size);
73 ptr = (varray_type) xcalloc (VARRAY_HDR_SIZE + data_size, 1);
75 ptr->num_elements = num_elements;
76 ptr->elements_used = 0;
77 ptr->type = element_kind;
82 /* Grow/shrink the virtual array VA to N elements. Zero any new elements
89 size_t old_elements = va->num_elements;
91 if (n != old_elements)
93 size_t elem_size = element_size[va->type];
94 size_t old_data_size = old_elements * elem_size;
95 size_t data_size = n * elem_size;
97 if (uses_ggc[va->type])
98 va = (varray_type) ggc_realloc (va, VARRAY_HDR_SIZE + data_size);
100 va = (varray_type) xrealloc ((char *) va, VARRAY_HDR_SIZE + data_size);
101 va->num_elements = n;
102 if (n > old_elements)
103 memset (&va->data.c[old_data_size], 0, data_size - old_data_size);
109 /* Reset a varray to its original state. */
114 size_t data_size = element_size[va->type] * va->num_elements;
116 memset (va->data.c, 0, data_size);
117 va->elements_used = 0;
120 /* Check the bounds of a varray access. */
122 #if defined ENABLE_CHECKING && (GCC_VERSION >= 2007)
124 extern void error PARAMS ((const char *, ...)) ATTRIBUTE_PRINTF_1;
127 varray_check_failed (va, n, file, line, function)
132 const char *function;
134 internal_error ("virtual array %s[%lu]: element %lu out of bounds in %s, at %s:%d",
135 va->name, (unsigned long) va->num_elements, (unsigned long) n,
136 function, trim_filename (file), line);