X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fcselib.h;h=d07c8330d47fd48d87a662c05768a95114531457;hb=4706835117e8da8ad02963fe9de97a1e07851ced;hp=72885982fbf73a5e47f0ce0b80c5ef3cf9f4dd4f;hpb=f12b58b3384f7b4faba39eaa3ebc67c3049f2a3c;p=pf3gnuchains%2Fgcc-fork.git

diff --git a/gcc/cselib.h b/gcc/cselib.h
index 72885982fbf..d07c8330d47 100644
--- a/gcc/cselib.h
+++ b/gcc/cselib.h
@@ -1,12 +1,13 @@
 /* Common subexpression elimination for GNU compiler.
-   Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-   1999 Free Software Foundation, Inc.
+   Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997,
+   1998, 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
@@ -15,34 +16,33 @@ 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.  */
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
 
 /* Describe a value.  */
-typedef struct cselib_val_struct
-{
+typedef struct cselib_val_struct {
   /* The hash value.  */
-  unsigned int value;
-  union
-  {
-    /* A VALUE rtx that points back to this structure.  */
-    rtx val_rtx;
-    /* Used to keep a list of free cselib_val structures.  */
-    struct cselib_val_struct *next_free;
-  } u;
+  unsigned int hash;
+
+  /* A unique id assigned to values.  */
+  int uid;
+
+  /* A VALUE rtx that points back to this structure.  */
+  rtx val_rtx;
 
   /* All rtl expressions that hold this value at the current time during a
      scan.  */
   struct elt_loc_list *locs;
+
   /* If this value is used as an address, points to a list of values that
      use it as an address in a MEM.  */
   struct elt_list *addr_list;
+
+  struct cselib_val_struct *next_containing_mem;
 } cselib_val;
 
 /* A list of rtl expressions that hold the same value.  */
-struct elt_loc_list
-{
+struct elt_loc_list {
   /* Next element in the list.  */
   struct elt_loc_list *next;
   /* An rtl expression that holds the value.  */
@@ -51,18 +51,48 @@ struct elt_loc_list
   rtx setting_insn;
 };
 
-/* A list of cselib_val structures.  */
-struct elt_list
+/* Describe a single set that is part of an insn.  */
+struct cselib_set
 {
-  struct elt_list *next;
-  cselib_val *elt;
+  rtx src;
+  rtx dest;
+  cselib_val *src_elt;
+  cselib_val *dest_addr_elt;
 };
 
-extern cselib_val *cselib_lookup	PARAMS ((rtx, enum machine_mode, int));
-extern void cselib_update_varray_sizes	PARAMS ((void));
-extern void cselib_init			PARAMS ((void));
-extern void cselib_finish		PARAMS ((void));
-extern void cselib_process_insn		PARAMS ((rtx));
-extern int rtx_equal_for_cselib_p	PARAMS ((rtx, rtx));
-extern int references_value_p		PARAMS ((rtx, int));
-extern rtx cselib_subst_to_values	PARAMS ((rtx));
+enum cselib_record_what
+{
+  CSELIB_RECORD_MEMORY = 1,
+  CSELIB_PRESERVE_CONSTANTS = 2
+};
+
+extern void (*cselib_discard_hook) (cselib_val *);
+extern void (*cselib_record_sets_hook) (rtx insn, struct cselib_set *sets,
+					int n_sets);
+
+extern cselib_val *cselib_lookup (rtx, enum machine_mode, int);
+extern cselib_val *cselib_lookup_from_insn (rtx, enum machine_mode, int, rtx);
+extern void cselib_init (int);
+extern void cselib_clear_table (void);
+extern void cselib_finish (void);
+extern void cselib_process_insn (rtx);
+extern enum machine_mode cselib_reg_set_mode (const_rtx);
+extern int rtx_equal_for_cselib_p (rtx, rtx);
+extern int references_value_p (const_rtx, int);
+extern rtx cselib_expand_value_rtx (rtx, bitmap, int);
+typedef rtx (*cselib_expand_callback)(rtx, bitmap, int, void *);
+extern rtx cselib_expand_value_rtx_cb (rtx, bitmap, int,
+				       cselib_expand_callback, void *);
+extern bool cselib_dummy_expand_value_rtx_cb (rtx, bitmap, int,
+					      cselib_expand_callback, void *);
+extern rtx cselib_subst_to_values (rtx);
+extern void cselib_invalidate_rtx (rtx);
+
+extern void cselib_reset_table (unsigned int);
+extern unsigned int cselib_get_next_uid (void);
+extern void cselib_preserve_value (cselib_val *);
+extern bool cselib_preserved_value_p (cselib_val *);
+extern void cselib_preserve_only_values (void);
+extern void cselib_preserve_cfa_base_value (cselib_val *, unsigned int);
+
+extern void dump_cselib_table (FILE *);