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/* Virtual array support.
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003
Free Software Foundation, Inc.
Contributed by Cygnus Solutions.
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 2, 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 COPYING. If not, write to the Free
the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include "config.h"
#include "errors.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "varray.h"
#include "ggc.h"
#define VARRAY_HDR_SIZE (sizeof (struct varray_head_tag) - sizeof (varray_data))
/* Do not add any more non-GC items here. Please either remove or GC those items that
are not GCed. */
static const struct {
unsigned char size;
bool uses_ggc;
} element[NUM_VARRAY_DATA] = {
{ sizeof (char), 1 },
{ sizeof (unsigned char), 1 },
{ sizeof (short), 1 },
{ sizeof (unsigned short), 1 },
{ sizeof (int), 1 },
{ sizeof (unsigned int), 1 },
{ sizeof (long), 1 },
{ sizeof (unsigned long), 1 },
{ sizeof (HOST_WIDE_INT), 1 },
{ sizeof (unsigned HOST_WIDE_INT), 1 },
{ sizeof (void *), 1 },
{ sizeof (char *), 1 },
{ sizeof (struct rtx_def *), 1 },
{ sizeof (struct rtvec_def *), 1 },
{ sizeof (union tree_node *), 1 },
{ sizeof (struct bitmap_head_def *), 1 },
{ sizeof (struct reg_info_def *), 0 },
{ sizeof (struct const_equiv_data), 0 },
{ sizeof (struct basic_block_def *), 0 },
{ sizeof (struct elt_list *), 1 },
};
/* Allocate a virtual array with NUM_ELEMENT elements, each of which is
ELEMENT_SIZE bytes long, named NAME. Array elements are zeroed. */
varray_type
varray_init (size_t num_elements, enum varray_data_enum element_kind,
const char *name)
{
size_t data_size = num_elements * element[element_kind].size;
varray_type ptr;
if (element[element_kind].uses_ggc)
ptr = ggc_alloc_cleared (VARRAY_HDR_SIZE + data_size);
else
ptr = xcalloc (VARRAY_HDR_SIZE + data_size, 1);
ptr->num_elements = num_elements;
ptr->elements_used = 0;
ptr->type = element_kind;
ptr->name = name;
return ptr;
}
/* Grow/shrink the virtual array VA to N elements. Zero any new elements
allocated. */
varray_type
varray_grow (varray_type va, size_t n)
{
size_t old_elements = va->num_elements;
if (n != old_elements)
{
size_t elem_size = element[va->type].size;
size_t old_data_size = old_elements * elem_size;
size_t data_size = n * elem_size;
if (element[va->type].uses_ggc)
va = ggc_realloc (va, VARRAY_HDR_SIZE + data_size);
else
va = xrealloc (va, VARRAY_HDR_SIZE + data_size);
va->num_elements = n;
if (n > old_elements)
memset (&va->data.c[old_data_size], 0, data_size - old_data_size);
}
return va;
}
/* Reset a varray to its original state. */
void
varray_clear (varray_type va)
{
size_t data_size = element[va->type].size * va->num_elements;
memset (va->data.c, 0, data_size);
va->elements_used = 0;
}
/* Check the bounds of a varray access. */
#if defined ENABLE_CHECKING && (GCC_VERSION >= 2007)
extern void error (const char *, ...) ATTRIBUTE_PRINTF_1;
void
varray_check_failed (varray_type va, size_t n, const char *file, int line,
const char *function)
{
internal_error ("virtual array %s[%lu]: element %lu out of bounds in %s, at %s:%d",
va->name, (unsigned long) va->num_elements, (unsigned long) n,
function, trim_filename (file), line);
}
#endif
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