gcc/

[pf3gnuchains/gcc-fork.git] / gcc / cselib.h

diff --git a/gcc/cselib.h b/gcc/cselib.h
index 394e731..0e4c6f2 100644 (file)
--- a/gcc/cselib.h
+++ b/gcc/cselib.h
@@ -1,12 +1,12 @@
 /* Common subexpression elimination for GNU compiler.
    Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-   1999, 2003, 2004 Free Software Foundation, Inc.
+   1999, 2003, 2004, 2005, 2006, 2007 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
@@ -15,26 +15,22 @@ 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 GTY(())
 {
   /* The hash value.  */
   unsigned int value;
-  union cselib_val_u
-  {
-    /* A VALUE rtx that points back to this structure.  */
-    rtx GTY ((tag ("1"))) val_rtx;
-    /* Used to keep a list of free cselib_val structures.  */
-    struct cselib_val_struct * GTY ((skip)) next_free;
-  } GTY ((desc ("1"))) u;
+
+  /* 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;
@@ -62,13 +58,16 @@ struct elt_list GTY(())
   cselib_val *elt;
 };
 
+extern void (*cselib_discard_hook) (cselib_val *);
+
 extern cselib_val *cselib_lookup (rtx, enum machine_mode, int);
 extern void cselib_init (bool record_memory);
 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 (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 (rtx, int);
+extern int references_value_p (const_rtx, int);
+extern rtx cselib_expand_value_rtx (rtx, bitmap, int);
 extern rtx cselib_subst_to_values (rtx);
 extern void cselib_invalidate_rtx (rtx);