b9bd6f7438
This patch basically arranges for the allocation size of line_map
buffers to be as close as possible to a power of two. This
*significantly* decreases peak memory consumption as (macro) maps are
numerous and stay live during all the compilation.
The patch adds a new ggc_round_alloc_size interface to the ggc
allocator. In each of the two main allocator implementations ('page'
and 'zone') the function has been extracted from the main allocation
function code and returns the actual size of the allocated memory
region, thus giving a chance to the caller to maximize the amount of
memory it actually uses from the allocated memory region. In the
'none' allocator implementation (that uses xmalloc) the
ggc_round_alloc_size just returns the requested allocation size.
Co-Authored-By: Dodji Seketeli <dodji@redhat.com>
From-SVN: r180086
102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
/* Null garbage collection for the GNU compiler.
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Copyright (C) 1998, 1999, 2000, 2003, 2004, 2005, 2007, 2010
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Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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/* This version is used by the gen* programs and certain language-specific
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targets (such as java), where we don't really need GC at all.
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This prevents problems with pulling in all the tree stuff. */
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#ifdef GENERATOR_FILE
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#include "bconfig.h"
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#else
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#include "config.h"
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#endif
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#include "system.h"
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#include "coretypes.h"
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#include "ggc.h"
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void *
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ggc_alloc_typed_stat (enum gt_types_enum ARG_UNUSED (gte), size_t size
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MEM_STAT_DECL)
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{
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return xmalloc (size);
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}
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/* For a given size of memory requested for allocation, return the
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actual size that is going to be allocated. */
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size_t
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ggc_round_alloc_size (size_t requested_size)
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{
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return requested_size;
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}
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void *
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ggc_internal_alloc_stat (size_t size MEM_STAT_DECL)
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{
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return xmalloc (size);
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}
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void *
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ggc_internal_cleared_alloc_stat (size_t size MEM_STAT_DECL)
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{
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return xcalloc (size, 1);
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}
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void *
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ggc_realloc_stat (void *x, size_t size MEM_STAT_DECL)
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{
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return xrealloc (x, size);
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}
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void
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ggc_free (void *p)
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{
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free (p);
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}
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struct alloc_zone
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{
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int dummy;
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};
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struct alloc_zone rtl_zone;
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struct alloc_zone tree_zone;
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struct alloc_zone tree_id_zone;
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#if defined (GGC_ZONE) && !defined (GENERATOR_FILE)
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void *
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ggc_internal_alloc_zone_stat (size_t size,
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struct alloc_zone * ARG_UNUSED(z) MEM_STAT_DECL)
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{
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return xmalloc (size);
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}
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void *
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ggc_internal_cleared_alloc_zone_stat (size_t size,
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struct alloc_zone * ARG_UNUSED(z)
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MEM_STAT_DECL)
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{
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return xcalloc (size, 1);
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}
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#endif
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