/* Register renaming for the GNU compiler.
- Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
+ Copyright (C) 2000, 2001, 2002, 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)
+ the Free 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
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, 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301, USA. */
+ along with GCC; see the file COPYING3. If not see
+ <http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "obstack.h"
#include "timevar.h"
#include "tree-pass.h"
+#include "df.h"
struct du_chain
{
enum op_type, int);
static struct du_chain *build_def_use (basic_block);
static void dump_def_use_chain (struct du_chain *);
-static void note_sets (rtx, rtx, void *);
+static void note_sets (rtx, const_rtx, void *);
static void clear_dead_regs (HARD_REG_SET *, enum machine_mode, rtx);
static void merge_overlapping_regs (basic_block, HARD_REG_SET *,
struct du_chain *);
-/* Called through note_stores from update_life. Find sets of registers, and
+/* Called through note_stores. Find sets of registers, and
record them in *DATA (which is actually a HARD_REG_SET *). */
static void
-note_sets (rtx x, rtx set ATTRIBUTE_UNUSED, void *data)
+note_sets (rtx x, const_rtx set ATTRIBUTE_UNUSED, void *data)
{
HARD_REG_SET *pset = (HARD_REG_SET *) data;
- unsigned int regno;
- int nregs;
if (GET_CODE (x) == SUBREG)
x = SUBREG_REG (x);
if (!REG_P (x))
return;
- regno = REGNO (x);
- nregs = hard_regno_nregs[regno][GET_MODE (x)];
-
/* There must not be pseudos at this point. */
- gcc_assert (regno + nregs <= FIRST_PSEUDO_REGISTER);
-
- while (nregs-- > 0)
- SET_HARD_REG_BIT (*pset, regno + nregs);
+ gcc_assert (HARD_REGISTER_P (x));
+ add_to_hard_reg_set (pset, GET_MODE (x), REGNO (x));
}
/* Clear all registers from *PSET for which a note of kind KIND can be found
if (REG_NOTE_KIND (note) == kind && REG_P (XEXP (note, 0)))
{
rtx reg = XEXP (note, 0);
- unsigned int regno = REGNO (reg);
- int nregs = hard_regno_nregs[regno][GET_MODE (reg)];
-
/* There must not be pseudos at this point. */
- gcc_assert (regno + nregs <= FIRST_PSEUDO_REGISTER);
-
- while (nregs-- > 0)
- CLEAR_HARD_REG_BIT (*pset, regno + nregs);
+ gcc_assert (HARD_REGISTER_P (reg));
+ remove_from_hard_reg_set (pset, GET_MODE (reg), REGNO (reg));
}
}
rtx insn;
HARD_REG_SET live;
- REG_SET_TO_HARD_REG_SET (live, b->il.rtl->global_live_at_start);
+ REG_SET_TO_HARD_REG_SET (live, df_get_live_in (b));
insn = BB_HEAD (b);
while (t)
{
basic_block bb;
char *first_obj;
+ df_set_flags (DF_LR_RUN_DCE);
+ df_note_add_problem ();
+ df_analyze ();
+ df_set_flags (DF_DEFER_INSN_RESCAN);
+
memset (tick, 0, sizeof tick);
gcc_obstack_init (&rename_obstack);
/* Don't clobber traceback for noreturn functions. */
if (frame_pointer_needed)
{
- int i;
-
- for (i = hard_regno_nregs[FRAME_POINTER_REGNUM][Pmode]; i--;)
- SET_HARD_REG_BIT (unavailable, FRAME_POINTER_REGNUM + i);
-
+ add_to_hard_reg_set (&unavailable, Pmode, FRAME_POINTER_REGNUM);
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
- for (i = hard_regno_nregs[HARD_FRAME_POINTER_REGNUM][Pmode]; i--;)
- SET_HARD_REG_BIT (unavailable, HARD_FRAME_POINTER_REGNUM + i);
+ add_to_hard_reg_set (&unavailable, Pmode, HARD_FRAME_POINTER_REGNUM);
#endif
}
|| fixed_regs[new_reg + i]
|| global_regs[new_reg + i]
/* Can't use regs which aren't saved by the prologue. */
- || (! regs_ever_live[new_reg + i]
+ || (! df_regs_ever_live_p (new_reg + i)
&& ! call_used_regs[new_reg + i])
#ifdef LEAF_REGISTERS
/* We can't use a non-leaf register if we're in a
do_replace (this, best_new_reg);
tick[best_new_reg] = ++this_tick;
- regs_ever_live[best_new_reg] = 1;
+ df_set_regs_ever_live (best_new_reg, true);
if (dump_file)
fprintf (dump_file, ", renamed as %s\n", reg_names[best_new_reg]);
if (dump_file)
fputc ('\n', dump_file);
-
- count_or_remove_death_notes (NULL, 1);
- update_life_info (NULL, UPDATE_LIFE_LOCAL,
- PROP_DEATH_NOTES);
}
static void
if (regno >= FIRST_PSEUDO_REGISTER)
ORIGINAL_REGNO (*chain->loc) = regno;
REG_ATTRS (*chain->loc) = attr;
+ df_insn_rescan (chain->insn);
chain = chain->next_use;
}
}
rtx op1 = orig_op1;
rtx *locI = NULL;
rtx *locB = NULL;
- enum rtx_code index_code;
+ enum rtx_code index_code = SCRATCH;
if (GET_CODE (op0) == SUBREG)
{
int index_op;
unsigned regno0 = REGNO (op0), regno1 = REGNO (op1);
- if (REGNO_OK_FOR_INDEX_P (regno0)
- && regno_ok_for_base_p (regno1, mode, PLUS, REG))
+ if (REGNO_OK_FOR_INDEX_P (regno1)
+ && regno_ok_for_base_p (regno0, mode, PLUS, REG))
+ index_op = 1;
+ else if (REGNO_OK_FOR_INDEX_P (regno0)
+ && regno_ok_for_base_p (regno1, mode, PLUS, REG))
index_op = 0;
- else if (REGNO_OK_FOR_INDEX_P (regno1)
- && regno_ok_for_base_p (regno0, mode, PLUS, REG))
+ else if (regno_ok_for_base_p (regno0, mode, PLUS, REG)
+ || REGNO_OK_FOR_INDEX_P (regno1))
index_op = 1;
else if (regno_ok_for_base_p (regno1, mode, PLUS, REG))
index_op = 0;
- else if (regno_ok_for_base_p (regno0, mode, PLUS, REG))
- index_op = 1;
- else if (REGNO_OK_FOR_INDEX_P (regno1))
- index_op = 1;
else
- index_op = 0;
+ index_op = 1;
locI = &XEXP (x, index_op);
locB = &XEXP (x, !index_op);
case CONST:
case CONST_INT:
case CONST_DOUBLE:
+ case CONST_FIXED:
case CONST_VECTOR:
case SYMBOL_REF:
case LABEL_REF:
}
for (i = 0; i < recog_data.n_dups; i++)
{
- int dup_num = recog_data.dup_num[i];
-
old_dups[i] = *recog_data.dup_loc[i];
*recog_data.dup_loc[i] = cc0_rtx;
-
- /* For match_dup of match_operator or match_parallel, share
- them, so that we don't miss changes in the dup. */
- if (icode >= 0
- && insn_data[icode].operand[dup_num].eliminable == 0)
- old_dups[i] = recog_data.operand[dup_num];
}
scan_rtx (insn, &PATTERN (insn), NO_REGS, terminate_all_read,
OP_IN, 0);
for (i = 0; i < recog_data.n_dups; i++)
- *recog_data.dup_loc[i] = old_dups[i];
+ *recog_data.dup_loc[i] = copy_rtx (old_dups[i]);
for (i = 0; i < n_ops; i++)
*recog_data.operand_loc[i] = old_operands[i];
+ if (recog_data.n_dups)
+ df_insn_rescan (insn);
/* Step 2B: Can't rename function call argument registers. */
if (CALL_P (insn) && CALL_INSN_FUNCTION_USAGE (insn))
static void kill_value (rtx, struct value_data *);
static void set_value_regno (unsigned, enum machine_mode, struct value_data *);
static void init_value_data (struct value_data *);
-static void kill_clobbered_value (rtx, rtx, void *);
-static void kill_set_value (rtx, rtx, void *);
+static void kill_clobbered_value (rtx, const_rtx, void *);
+static void kill_set_value (rtx, const_rtx, void *);
static int kill_autoinc_value (rtx *, void *);
static void copy_value (rtx, rtx, struct value_data *);
static bool mode_change_ok (enum machine_mode, enum machine_mode,
/* Called through note_stores. If X is clobbered, kill its value. */
static void
-kill_clobbered_value (rtx x, rtx set, void *data)
+kill_clobbered_value (rtx x, const_rtx set, void *data)
{
struct value_data *vd = data;
if (GET_CODE (set) == CLOBBER)
current value and install it as the root of its own value list. */
static void
-kill_set_value (rtx x, rtx set, void *data)
+kill_set_value (rtx x, const_rtx set, void *data)
{
struct value_data *vd = data;
if (GET_CODE (set) != CLOBBER)
{
enum machine_mode oldmode = vd->e[i].mode;
rtx new;
- unsigned int last;
- for (last = i; last < i + hard_regno_nregs[i][mode]; last++)
- if (!TEST_HARD_REG_BIT (reg_class_contents[cl], last))
- return NULL_RTX;
+ if (!in_hard_reg_set_p (reg_class_contents[cl], mode, i))
+ return NULL_RTX;
new = maybe_mode_change (oldmode, vd->e[regno].mode, mode, i, regno);
if (new)
rtx op1 = orig_op1;
rtx *locI = NULL;
rtx *locB = NULL;
- enum rtx_code index_code;
+ enum rtx_code index_code = SCRATCH;
if (GET_CODE (op0) == SUBREG)
{
int index_op;
unsigned regno0 = REGNO (op0), regno1 = REGNO (op1);
- if (REGNO_OK_FOR_INDEX_P (regno0)
- && regno_ok_for_base_p (regno1, mode, PLUS, REG))
+ if (REGNO_OK_FOR_INDEX_P (regno1)
+ && regno_ok_for_base_p (regno0, mode, PLUS, REG))
+ index_op = 1;
+ else if (REGNO_OK_FOR_INDEX_P (regno0)
+ && regno_ok_for_base_p (regno1, mode, PLUS, REG))
index_op = 0;
- else if (REGNO_OK_FOR_INDEX_P (regno1)
- && regno_ok_for_base_p (regno0, mode, PLUS, REG))
+ else if (regno_ok_for_base_p (regno0, mode, PLUS, REG)
+ || REGNO_OK_FOR_INDEX_P (regno1))
index_op = 1;
else if (regno_ok_for_base_p (regno1, mode, PLUS, REG))
index_op = 0;
- else if (regno_ok_for_base_p (regno0, mode, PLUS, REG))
- index_op = 1;
- else if (REGNO_OK_FOR_INDEX_P (regno1))
- index_op = 1;
else
- index_op = 0;
+ index_op = 1;
locI = &XEXP (x, index_op);
locB = &XEXP (x, !index_op);
recog_data.operand[i] = new;
for (j = 0; j < recog_data.n_dups; j++)
if (recog_data.dup_num[j] == i)
- validate_change (insn, recog_data.dup_loc[j], new, 1);
+ validate_unshare_change (insn, recog_data.dup_loc[j], new, 1);
any_replacements = true;
}
copyprop_hardreg_forward (void)
{
struct value_data *all_vd;
- bool need_refresh;
basic_block bb;
sbitmap visited;
- need_refresh = false;
-
all_vd = XNEWVEC (struct value_data, last_basic_block);
visited = sbitmap_alloc (last_basic_block);
else
init_value_data (all_vd + bb->index);
- if (copyprop_hardreg_forward_1 (bb, all_vd + bb->index))
- need_refresh = true;
+ copyprop_hardreg_forward_1 (bb, all_vd + bb->index);
}
sbitmap_free (visited);
-
- if (need_refresh)
- {
- if (dump_file)
- fputs ("\n\n", dump_file);
-
- /* ??? Irritatingly, delete_noop_moves does not take a set of blocks
- to scan, so we have to do a life update with no initial set of
- blocks Just In Case. */
- delete_noop_moves ();
- update_life_info (NULL, UPDATE_LIFE_GLOBAL_RM_NOTES,
- PROP_DEATH_NOTES
- | PROP_SCAN_DEAD_CODE
- | PROP_KILL_DEAD_CODE);
- }
-
free (all_vd);
}
static bool
gate_handle_regrename (void)
{
- return (optimize > 0 && (flag_rename_registers || flag_cprop_registers));
+ return (optimize > 0 && (flag_rename_registers));
}
static unsigned int
rest_of_handle_regrename (void)
{
- if (flag_rename_registers)
- regrename_optimize ();
- if (flag_cprop_registers)
- copyprop_hardreg_forward ();
+ regrename_optimize ();
return 0;
}
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
+ TODO_df_finish | TODO_verify_rtl_sharing |
TODO_dump_func, /* todo_flags_finish */
'n' /* letter */
};
+static bool
+gate_handle_cprop (void)
+{
+ return (optimize > 0 && (flag_cprop_registers));
+}
+
+
+/* Run the regrename and cprop passes. */
+static unsigned int
+rest_of_handle_cprop (void)
+{
+ copyprop_hardreg_forward ();
+ return 0;
+}
+
+struct tree_opt_pass pass_cprop_hardreg =
+{
+ "cprop_hardreg", /* name */
+ gate_handle_cprop, /* gate */
+ rest_of_handle_cprop, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ TV_RENAME_REGISTERS, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ TODO_dump_func | TODO_verify_rtl_sharing, /* todo_flags_finish */
+ 'n' /* letter */
+};
+
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