/* Common subexpression elimination for GNU compiler.
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999 Free Software Foundation, Inc.
+ 1999, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
This file is part of GCC.
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. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
/* Describe a value. */
-typedef struct cselib_val_struct
+typedef struct cselib_val_struct GTY(())
{
/* 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;
+
+ /* 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 GTY(())
{
/* Next element in the list. */
struct elt_loc_list *next;
rtx loc;
/* The insn that made the equivalence. */
rtx setting_insn;
+ /* True when setting insn is inside libcall. */
+ bool in_libcall;
};
/* A list of cselib_val structures. */
-struct elt_list
+struct elt_list GTY(())
{
struct elt_list *next;
cselib_val *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));
+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 int rtx_equal_for_cselib_p (rtx, rtx);
+extern int references_value_p (rtx, int);
+extern rtx cselib_expand_value_rtx (rtx, bitmap, int);
+extern rtx cselib_subst_to_values (rtx);
+extern void cselib_invalidate_rtx (rtx);