/* 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, 2009, 2010
- Free Software Foundation, Inc.
+ Copyright (C) 1987-2015 Free Software Foundation, Inc.
This file is part of GCC.
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
+#ifndef GCC_CSELIB_H
+#define GCC_CSELIB_H
+
/* Describe a value. */
-typedef struct cselib_val_struct {
+struct cselib_val
+{
/* The hash value. */
unsigned int hash;
use it as an address in a MEM. */
struct elt_list *addr_list;
- struct cselib_val_struct *next_containing_mem;
-} cselib_val;
+ struct cselib_val *next_containing_mem;
+
+ /* Pool allocation new operator. */
+ inline void *operator new (size_t)
+ {
+ return pool.allocate ();
+ }
+
+ /* Delete operator utilizing pool allocation. */
+ inline void operator delete (void *ptr)
+ {
+ pool.remove ((cselib_val *) ptr);
+ }
+
+ /* Memory allocation pool. */
+ static pool_allocator<cselib_val> pool;
+};
/* A list of rtl expressions that hold the same value. */
struct elt_loc_list {
/* An rtl expression that holds the value. */
rtx loc;
/* The insn that made the equivalence. */
- rtx setting_insn;
+ rtx_insn *setting_insn;
+
+ /* Pool allocation new operator. */
+ inline void *operator new (size_t)
+ {
+ return pool.allocate ();
+ }
+
+ /* Delete operator utilizing pool allocation. */
+ inline void operator delete (void *ptr)
+ {
+ pool.remove ((elt_loc_list *) ptr);
+ }
+
+ /* Memory allocation pool. */
+ static pool_allocator<elt_loc_list> pool;
};
/* Describe a single set that is part of an insn. */
};
extern void (*cselib_discard_hook) (cselib_val *);
-extern void (*cselib_record_sets_hook) (rtx insn, struct cselib_set *sets,
+extern void (*cselib_record_sets_hook) (rtx_insn *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 cselib_val *cselib_lookup (rtx, machine_mode,
+ int, machine_mode);
+extern cselib_val *cselib_lookup_from_insn (rtx, machine_mode,
+ int, machine_mode, rtx_insn *);
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 void cselib_process_insn (rtx_insn *);
+extern bool fp_setter_insn (rtx_insn *);
+extern 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);
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 rtx cselib_subst_to_values (rtx, machine_mode);
+extern rtx cselib_subst_to_values_from_insn (rtx, machine_mode, rtx_insn *);
extern void cselib_invalidate_rtx (rtx);
extern void cselib_reset_table (unsigned int);
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 cselib_add_permanent_equiv (cselib_val *, rtx, rtx_insn *);
+extern bool cselib_have_permanent_equivalences (void);
+extern void cselib_set_value_sp_based (cselib_val *);
+extern bool cselib_sp_based_value_p (cselib_val *);
extern void dump_cselib_table (FILE *);
+
+/* Return the canonical value for VAL, following the equivalence chain
+ towards the earliest (== lowest uid) equivalent value. */
+
+static inline cselib_val *
+canonical_cselib_val (cselib_val *val)
+{
+ cselib_val *canon;
+
+ if (!val->locs || val->locs->next
+ || !val->locs->loc || GET_CODE (val->locs->loc) != VALUE
+ || val->uid < CSELIB_VAL_PTR (val->locs->loc)->uid)
+ return val;
+
+ canon = CSELIB_VAL_PTR (val->locs->loc);
+ gcc_checking_assert (canonical_cselib_val (canon) == canon);
+ return canon;
+}
+
+#endif /* GCC_CSELIB_H */