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author | obrien <obrien@FreeBSD.org> | 2002-02-01 18:16:02 +0000 |
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committer | obrien <obrien@FreeBSD.org> | 2002-02-01 18:16:02 +0000 |
commit | c9ab9ae440a8066b2c2b85b157b1fdadcf09916a (patch) | |
tree | 086d9d6c8fbd4fc8fe4495059332f66bc0f8d12b /contrib/gcc/lists.c | |
parent | 2ecfd8bd04b63f335c1ec6295740a4bfd97a4fa6 (diff) | |
download | FreeBSD-src-c9ab9ae440a8066b2c2b85b157b1fdadcf09916a.zip FreeBSD-src-c9ab9ae440a8066b2c2b85b157b1fdadcf09916a.tar.gz |
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0.
These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
Diffstat (limited to 'contrib/gcc/lists.c')
-rw-r--r-- | contrib/gcc/lists.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/contrib/gcc/lists.c b/contrib/gcc/lists.c new file mode 100644 index 0000000..0adacfb --- /dev/null +++ b/contrib/gcc/lists.c @@ -0,0 +1,163 @@ +/* List management for the GNU C-Compiler expander. + Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999 Free Software Foundation, Inc. + +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 +Software Foundation, 59 Temple Place - Suite 330, Boston, MA +02111-1307, USA. */ + +#include "config.h" +#include "system.h" +#include "toplev.h" +#include "rtl.h" +#include "ggc.h" + +static void free_list PARAMS ((rtx *, rtx *)); +static void zap_lists PARAMS ((void *)); + +/* Functions for maintaining cache-able lists of EXPR_LIST and INSN_LISTs. */ + +/* An INSN_LIST containing all INSN_LISTs allocated but currently unused. */ +static rtx unused_insn_list; + +/* An EXPR_LIST containing all EXPR_LISTs allocated but currently unused. */ +static rtx unused_expr_list; + + +/* This function will free an entire list of either EXPR_LIST or INSN_LIST + nodes. This is to be used only only lists that consist exclusively of + nodes of one type only. This is only called by free_EXPR_LIST_list + and free_INSN_LIST_list. */ +static void +free_list (listp, unused_listp) + rtx *listp, *unused_listp; +{ + rtx link, prev_link; + + prev_link = *listp; + link = XEXP (prev_link, 1); + + while (link) + { + prev_link = link; + link = XEXP (link, 1); + } + + XEXP (prev_link, 1) = *unused_listp; + *unused_listp = *listp; + *listp = 0; +} + +/* This call is used in place of a gen_rtx_INSN_LIST. If there is a cached + node available, we'll use it, otherwise a call to gen_rtx_INSN_LIST + is made. */ +rtx +alloc_INSN_LIST (val, next) + rtx val, next; +{ + rtx r; + + if (unused_insn_list) + { + r = unused_insn_list; + unused_insn_list = XEXP (r, 1); + XEXP (r, 0) = val; + XEXP (r, 1) = next; + PUT_REG_NOTE_KIND (r, VOIDmode); + } + else + r = gen_rtx_INSN_LIST (VOIDmode, val, next); + + return r; +} + +/* This call is used in place of a gen_rtx_EXPR_LIST. If there is a cached + node available, we'll use it, otherwise a call to gen_rtx_EXPR_LIST + is made. */ +rtx +alloc_EXPR_LIST (kind, val, next) + int kind; + rtx val, next; +{ + rtx r; + + if (unused_expr_list) + { + r = unused_expr_list; + unused_expr_list = XEXP (r, 1); + XEXP (r, 0) = val; + XEXP (r, 1) = next; + PUT_REG_NOTE_KIND (r, kind); + } + else + r = gen_rtx_EXPR_LIST (kind, val, next); + + return r; +} + +/* This function will initialize the EXPR_LIST and INSN_LIST caches. */ + +static void +zap_lists (dummy) + void *dummy ATTRIBUTE_UNUSED; +{ + unused_expr_list = NULL; + unused_insn_list = NULL; +} + +void +init_EXPR_INSN_LIST_cache () +{ + ggc_add_root (&unused_expr_list, 1, 1, zap_lists); +} + +/* This function will free up an entire list of EXPR_LIST nodes. */ +void +free_EXPR_LIST_list (listp) + rtx *listp; +{ + if (*listp == 0) + return; + free_list (listp, &unused_expr_list); +} + +/* This function will free up an entire list of INSN_LIST nodes. */ +void +free_INSN_LIST_list (listp) + rtx *listp; +{ + if (*listp == 0) + return; + free_list (listp, &unused_insn_list); +} + +/* This function will free up an individual EXPR_LIST node. */ +void +free_EXPR_LIST_node (ptr) + rtx ptr; +{ + XEXP (ptr, 1) = unused_expr_list; + unused_expr_list = ptr; +} + +/* This function will free up an individual INSN_LIST node. */ +void +free_INSN_LIST_node (ptr) + rtx ptr; +{ + XEXP (ptr, 1) = unused_insn_list; + unused_insn_list = ptr; +} |