-/* List management for the GNU C-Compiler expander.
+/* List management for the GCC expander.
Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999 Free Software Foundation, Inc.
+ 1999, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+ 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
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
-#include "toplev.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "diagnostic-core.h"
#include "rtl.h"
#include "ggc.h"
-static void free_list PARAMS ((rtx *, rtx *));
-static void zap_lists PARAMS ((void *));
+static void free_list (rtx *, rtx *);
/* 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;
+static GTY ((deletable)) rtx unused_insn_list;
/* An EXPR_LIST containing all EXPR_LISTs allocated but currently unused. */
-static rtx unused_expr_list;
+static GTY ((deletable)) 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. */
+/* This function will free an entire list of either EXPR_LIST, INSN_LIST
+ or DEPS_LIST nodes. This is to be used only on lists that consist
+ exclusively of nodes of one type only. This is only called by
+ free_EXPR_LIST_list, free_INSN_LIST_list and free_DEPS_LIST_list. */
static void
-free_list (listp, unused_listp)
- rtx *listp, *unused_listp;
+free_list (rtx *listp, rtx *unused_listp)
{
rtx link, prev_link;
prev_link = *listp;
link = XEXP (prev_link, 1);
+ gcc_assert (unused_listp != &unused_insn_list
+ || GET_CODE (prev_link) == INSN_LIST);
+
while (link)
{
+ gcc_assert (unused_listp != &unused_insn_list
+ || GET_CODE (prev_link) == INSN_LIST);
+
prev_link = link;
link = XEXP (link, 1);
}
*listp = 0;
}
+/* Find corresponding to ELEM node in the list pointed to by LISTP.
+ This node must exist in the list. Returns pointer to that node. */
+static rtx *
+find_list_elem (rtx elem, rtx *listp)
+{
+ while (XEXP (*listp, 0) != elem)
+ listp = &XEXP (*listp, 1);
+ return listp;
+}
+
+/* Remove the node pointed to by LISTP from the list. */
+static void
+remove_list_node (rtx *listp)
+{
+ rtx node;
+
+ node = *listp;
+ *listp = XEXP (node, 1);
+ XEXP (node, 1) = 0;
+}
+
+/* Removes corresponding to ELEM node from the list pointed to by LISTP.
+ Returns that node. */
+rtx
+remove_list_elem (rtx elem, rtx *listp)
+{
+ rtx node;
+
+ listp = find_list_elem (elem, listp);
+ node = *listp;
+ remove_list_node (listp);
+ return node;
+}
+
/* 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;
+alloc_INSN_LIST (rtx val, rtx next)
{
rtx r;
XEXP (r, 0) = val;
XEXP (r, 1) = next;
PUT_REG_NOTE_KIND (r, VOIDmode);
+
+ gcc_assert (GET_CODE (r) == INSN_LIST);
}
else
r = gen_rtx_INSN_LIST (VOIDmode, val, next);
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;
+alloc_EXPR_LIST (int kind, rtx val, rtx next)
{
rtx r;
PUT_REG_NOTE_KIND (r, kind);
}
else
- r = gen_rtx_EXPR_LIST (kind, val, next);
+ r = gen_rtx_EXPR_LIST ((enum machine_mode) 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;
+free_EXPR_LIST_list (rtx *listp)
{
if (*listp == 0)
return;
/* This function will free up an entire list of INSN_LIST nodes. */
void
-free_INSN_LIST_list (listp)
- rtx *listp;
+free_INSN_LIST_list (rtx *listp)
{
if (*listp == 0)
return;
free_list (listp, &unused_insn_list);
}
+/* Make a copy of the INSN_LIST list LINK and return it. */
+rtx
+copy_INSN_LIST (rtx link)
+{
+ rtx new_queue;
+ rtx *pqueue = &new_queue;
+
+ for (; link; link = XEXP (link, 1))
+ {
+ rtx x = XEXP (link, 0);
+ rtx newlink = alloc_INSN_LIST (x, NULL);
+ *pqueue = newlink;
+ pqueue = &XEXP (newlink, 1);
+ }
+ *pqueue = NULL_RTX;
+ return new_queue;
+}
+
+/* Duplicate the INSN_LIST elements of COPY and prepend them to OLD. */
+rtx
+concat_INSN_LIST (rtx copy, rtx old)
+{
+ rtx new_rtx = old;
+ for (; copy ; copy = XEXP (copy, 1))
+ {
+ new_rtx = alloc_INSN_LIST (XEXP (copy, 0), new_rtx);
+ PUT_REG_NOTE_KIND (new_rtx, REG_NOTE_KIND (copy));
+ }
+ return new_rtx;
+}
+
/* This function will free up an individual EXPR_LIST node. */
void
-free_EXPR_LIST_node (ptr)
- rtx ptr;
+free_EXPR_LIST_node (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;
+free_INSN_LIST_node (rtx ptr)
{
+ gcc_assert (GET_CODE (ptr) == INSN_LIST);
XEXP (ptr, 1) = unused_insn_list;
unused_insn_list = ptr;
}
+
+/* Remove and free corresponding to ELEM node in the INSN_LIST pointed to
+ by LISTP. */
+void
+remove_free_INSN_LIST_elem (rtx elem, rtx *listp)
+{
+ free_INSN_LIST_node (remove_list_elem (elem, listp));
+}
+
+/* Remove and free the first node in the INSN_LIST pointed to by LISTP. */
+rtx
+remove_free_INSN_LIST_node (rtx *listp)
+{
+ rtx node = *listp;
+ rtx elem = XEXP (node, 0);
+
+ remove_list_node (listp);
+ free_INSN_LIST_node (node);
+
+ return elem;
+}
+
+/* Remove and free the first node in the EXPR_LIST pointed to by LISTP. */
+rtx
+remove_free_EXPR_LIST_node (rtx *listp)
+{
+ rtx node = *listp;
+ rtx elem = XEXP (node, 0);
+
+ remove_list_node (listp);
+ free_EXPR_LIST_node (node);
+
+ return elem;
+}
+
+#include "gt-lists.h"
OSDN Git Service
