* tree.c (build_common_builtin_nodes): Always clear TREE_NOTHROW on

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

diff --git a/gcc/cselib.h b/gcc/cselib.h
index 59ccec6..90d9638 100644 (file)
--- a/gcc/cselib.h
+++ b/gcc/cselib.h
@@ -1,6 +1,7 @@
 /* Common subexpression elimination for GNU compiler.
-   Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-   1999, 2003, 2004, 2005, 2006, 2007, 2008 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.
 
@@ -19,10 +20,12 @@ along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
 /* Describe a value.  */
-typedef struct cselib_val_struct GTY(())
-{
+typedef struct GTY(()) cselib_val_struct {
   /* The hash value.  */
-  unsigned int value;
+  unsigned int hash;
+
+  /* A unique id assigned to values.  */
+  int uid;
 
   /* A VALUE rtx that points back to this structure.  */
   rtx val_rtx;
@@ -39,8 +42,7 @@ typedef struct cselib_val_struct GTY(())
 } cselib_val;
 
 /* A list of rtl expressions that hold the same value.  */
-struct elt_loc_list GTY(())
-{
+struct GTY(()) elt_loc_list {
   /* Next element in the list.  */
   struct elt_loc_list *next;
   /* An rtl expression that holds the value.  */
@@ -50,16 +52,33 @@ struct elt_loc_list GTY(())
 };
 
 /* A list of cselib_val structures.  */
-struct elt_list GTY(())
-{
+struct GTY(()) elt_list {
   struct elt_list *next;
   cselib_val *elt;
 };
 
+/* Describe a single set that is part of an insn.  */
+struct cselib_set
+{
+  rtx src;
+  rtx dest;
+  cselib_val *src_elt;
+  cselib_val *dest_addr_elt;
+};
+
+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 void cselib_init (bool record_memory);
+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);
@@ -67,5 +86,19 @@ 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 *);
+
+extern void dump_cselib_table (FILE *);