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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/varray.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/varray.c | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/varray.c b/gcc-4.2.1-5666.3/gcc/varray.c new file mode 100644 index 000000000..9900f9e1b --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/varray.c @@ -0,0 +1,259 @@ +/* Virtual array support. + Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006 + 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, 51 Franklin Street, Fifth Floor, Boston, + MA 02110-1301, USA. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "toplev.h" +#include "varray.h" +#include "ggc.h" +#include "hashtab.h" + +#define VARRAY_HDR_SIZE (sizeof (struct varray_head_tag) - sizeof (varray_data)) + +#ifdef GATHER_STATISTICS + +/* Store information about each particular varray. */ +struct varray_descriptor +{ + const char *name; + int allocated; + int created; + int resized; + int copied; +}; + +/* Hashtable mapping varray names to descriptors. */ +static htab_t varray_hash; + +/* Hashtable helpers. */ +static hashval_t +hash_descriptor (const void *p) +{ + const struct varray_descriptor *d = p; + return htab_hash_pointer (d->name); +} +static int +eq_descriptor (const void *p1, const void *p2) +{ + const struct varray_descriptor *d = p1; + return d->name == p2; +} + +/* For given name, return descriptor, create new if needed. */ +static struct varray_descriptor * +varray_descriptor (const char *name) +{ + struct varray_descriptor **slot; + + if (!varray_hash) + varray_hash = htab_create (10, hash_descriptor, eq_descriptor, NULL); + + slot = (struct varray_descriptor **) + htab_find_slot_with_hash (varray_hash, name, + htab_hash_pointer (name), + 1); + if (*slot) + return *slot; + *slot = xcalloc (sizeof (**slot), 1); + (*slot)->name = name; + return *slot; +} +#endif + +/* 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 (void *), 0 }, + { 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 basic_block_def *), 1 }, + { sizeof (struct elt_list *), 1 }, + { sizeof (struct edge_def *), 1 }, + { sizeof (tree *), 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; +#ifdef GATHER_STATISTICS + struct varray_descriptor *desc = varray_descriptor (name); + + desc->created++; + desc->allocated += data_size + VARRAY_HDR_SIZE; +#endif + 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; +#ifdef GATHER_STATISTICS + struct varray_descriptor *desc = varray_descriptor (va->name); + varray_type oldva = va; + + if (data_size > old_data_size) + desc->allocated += data_size - old_data_size; + desc->resized ++; +#endif + + + 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.vdt_c[old_data_size], 0, data_size - old_data_size); +#ifdef GATHER_STATISTICS + if (oldva != va) + desc->copied++; +#endif + } + + 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.vdt_c, 0, data_size); + va->elements_used = 0; +} + +/* Check the bounds of a varray access. */ + +#if defined ENABLE_CHECKING && (GCC_VERSION >= 2007) + +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); +} + +void +varray_underflow (varray_type va, const char *file, int line, + const char *function) +{ + internal_error ("underflowed virtual array %s in %s, at %s:%d", + va->name, function, trim_filename (file), line); +} + +#endif + + +/* Output per-varray statistics. */ +#ifdef GATHER_STATISTICS + +/* Used to accumulate statistics about varray sizes. */ +struct output_info +{ + int count; + int size; +}; + +/* Called via htab_traverse. Output varray descriptor pointed out by SLOT + and update statistics. */ +static int +print_statistics (void **slot, void *b) +{ + struct varray_descriptor *d = (struct varray_descriptor *) *slot; + struct output_info *i = (struct output_info *) b; + + if (d->allocated) + { + fprintf (stderr, "%-21s %6d %10d %7d %7d\n", d->name, + d->created, d->allocated, d->resized, d->copied); + i->size += d->allocated; + i->count += d->created; + } + return 1; +} +#endif + +/* Output per-varray memory usage statistics. */ +void +dump_varray_statistics (void) +{ +#ifdef GATHER_STATISTICS + struct output_info info; + + fprintf (stderr, "\nVARRAY Kind Count Bytes Resized copied\n"); + fprintf (stderr, "-------------------------------------------------------\n"); + info.count = 0; + info.size = 0; + htab_traverse (varray_hash, print_statistics, &info); + fprintf (stderr, "-------------------------------------------------------\n"); + fprintf (stderr, "%-20s %7d %10d\n", + "Total", info.count, info.size); + fprintf (stderr, "-------------------------------------------------------\n"); +#endif +} |