/* Perform branch target register load optimizations.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
This file is part of GCC.
unsigned int dest_reg, int other_btr_uses_before_def,
btr_def_group *all_btr_def_groups)
{
- btr_def this
- = XOBNEW (&migrate_btrl_obstack, struct btr_def_s);
- this->bb = bb;
- this->luid = insn_luid;
- this->insn = insn;
- this->btr = dest_reg;
- this->cost = basic_block_freq (bb);
- this->has_ambiguous_use = 0;
- this->other_btr_uses_before_def = other_btr_uses_before_def;
- this->other_btr_uses_after_use = 0;
- this->next_this_bb = NULL;
- this->next_this_group = NULL;
- this->uses = NULL;
- this->live_range = NULL;
- find_btr_def_group (all_btr_def_groups, this);
-
- fibheap_insert (all_btr_defs, -this->cost, this);
+ btr_def this_def = XOBNEW (&migrate_btrl_obstack, struct btr_def_s);
+ this_def->bb = bb;
+ this_def->luid = insn_luid;
+ this_def->insn = insn;
+ this_def->btr = dest_reg;
+ this_def->cost = basic_block_freq (bb);
+ this_def->has_ambiguous_use = 0;
+ this_def->other_btr_uses_before_def = other_btr_uses_before_def;
+ this_def->other_btr_uses_after_use = 0;
+ this_def->next_this_bb = NULL;
+ this_def->next_this_group = NULL;
+ this_def->uses = NULL;
+ this_def->live_range = NULL;
+ find_btr_def_group (all_btr_def_groups, this_def);
+
+ fibheap_insert (all_btr_defs, -this_def->cost, this_def);
if (dump_file)
fprintf (dump_file,
"Found target reg definition: sets %u { bb %d, insn %d }%s priority %d\n",
- dest_reg, bb->index, INSN_UID (insn), (this->group ? "" : ":not const"),
- this->cost);
+ dest_reg, bb->index, INSN_UID (insn),
+ (this_def->group ? "" : ":not const"), this_def->cost);
- return this;
+ return this_def;
}
/* Create a new target register user structure, for a use in block BB,
btr_def_group all_btr_def_groups = NULL;
defs_uses_info info;
- sbitmap_vector_zero (bb_gen, n_basic_blocks);
- for (i = NUM_FIXED_BLOCKS; i < n_basic_blocks; i++)
+ sbitmap_vector_zero (bb_gen, last_basic_block);
+ for (i = NUM_FIXED_BLOCKS; i < last_basic_block; i++)
{
basic_block bb = BASIC_BLOCK (i);
int reg;
/* For each basic block, form the set BB_KILL - the set
of definitions that the block kills. */
- sbitmap_vector_zero (bb_kill, n_basic_blocks);
- for (i = NUM_FIXED_BLOCKS; i < n_basic_blocks; i++)
+ sbitmap_vector_zero (bb_kill, last_basic_block);
+ for (i = NUM_FIXED_BLOCKS; i < last_basic_block; i++)
{
for (regno = first_btr; regno <= last_btr; regno++)
if (TEST_HARD_REG_BIT (all_btrs, regno)
int changed;
sbitmap bb_in = sbitmap_alloc (max_uid);
- for (i = NUM_FIXED_BLOCKS; i < n_basic_blocks; i++)
+ for (i = NUM_FIXED_BLOCKS; i < last_basic_block; i++)
sbitmap_copy (bb_out[i], bb_gen[i]);
changed = 1;
while (changed)
{
changed = 0;
- for (i = NUM_FIXED_BLOCKS; i < n_basic_blocks; i++)
+ for (i = NUM_FIXED_BLOCKS; i < last_basic_block; i++)
{
sbitmap_union_of_preds (bb_in, bb_out, i);
changed |= sbitmap_union_of_diff_cg (bb_out[i], bb_gen[i],
/* Link uses to the uses lists of all of their reaching defs.
Count up the number of reaching defs of each use. */
- for (i = NUM_FIXED_BLOCKS; i < n_basic_blocks; i++)
+ for (i = NUM_FIXED_BLOCKS; i < last_basic_block; i++)
{
basic_block bb = BASIC_BLOCK (i);
rtx insn;
btr_user *use_array = XCNEWVEC (btr_user, max_uid);
sbitmap *btr_defset = sbitmap_vector_alloc (
(last_btr - first_btr) + 1, max_uid);
- sbitmap *bb_gen = sbitmap_vector_alloc (n_basic_blocks, max_uid);
- HARD_REG_SET *btrs_written = XCNEWVEC (HARD_REG_SET, n_basic_blocks);
+ sbitmap *bb_gen = sbitmap_vector_alloc (last_basic_block, max_uid);
+ HARD_REG_SET *btrs_written = XCNEWVEC (HARD_REG_SET, last_basic_block);
sbitmap *bb_kill;
sbitmap *bb_out;
compute_defs_uses_and_gen (all_btr_defs, def_array, use_array, btr_defset,
bb_gen, btrs_written);
- bb_kill = sbitmap_vector_alloc (n_basic_blocks, max_uid);
+ bb_kill = sbitmap_vector_alloc (last_basic_block, max_uid);
compute_kill (bb_kill, btr_defset, btrs_written);
free (btrs_written);
- bb_out = sbitmap_vector_alloc (n_basic_blocks, max_uid);
+ bb_out = sbitmap_vector_alloc (last_basic_block, max_uid);
compute_out (bb_out, bb_gen, bb_kill, max_uid);
sbitmap_vector_free (bb_gen);
HARD_REG_SET btrs_live_in_range;
int btr_used_near_def = 0;
int def_basic_block_freq;
- basic_block try;
+ basic_block attempt;
int give_up = 0;
int def_moved = 0;
btr_user user;
def_basic_block_freq = basic_block_freq (def->bb);
- for (try = get_immediate_dominator (CDI_DOMINATORS, def->bb);
- !give_up && try && try != ENTRY_BLOCK_PTR && def->cost >= min_cost;
- try = get_immediate_dominator (CDI_DOMINATORS, try))
+ for (attempt = get_immediate_dominator (CDI_DOMINATORS, def->bb);
+ !give_up && attempt && attempt != ENTRY_BLOCK_PTR && def->cost >= min_cost;
+ attempt = get_immediate_dominator (CDI_DOMINATORS, attempt))
{
/* Try to move the instruction that sets the target register into
- basic block TRY. */
- int try_freq = basic_block_freq (try);
+ basic block ATTEMPT. */
+ int try_freq = basic_block_freq (attempt);
edge_iterator ei;
edge e;
- /* If TRY has abnormal edges, skip it. */
- FOR_EACH_EDGE (e, ei, try->succs)
+ /* If ATTEMPT has abnormal edges, skip it. */
+ FOR_EACH_EDGE (e, ei, attempt->succs)
if (e->flags & EDGE_COMPLEX)
break;
if (e)
continue;
if (dump_file)
- fprintf (dump_file, "trying block %d ...", try->index);
+ fprintf (dump_file, "trying block %d ...", attempt->index);
if (try_freq < def_basic_block_freq
|| (try_freq == def_basic_block_freq && btr_used_near_def))
{
int btr;
- augment_live_range (live_range, &btrs_live_in_range, def->bb, try,
+ augment_live_range (live_range, &btrs_live_in_range, def->bb, attempt,
flag_btr_bb_exclusive);
if (dump_file)
{
btr = choose_btr (btrs_live_in_range);
if (btr != -1)
{
- move_btr_def (try, btr, def, live_range, &btrs_live_in_range);
+ move_btr_def (attempt, btr, def, live_range, &btrs_live_in_range);
bitmap_copy(live_range, def->live_range);
btr_used_near_def = 0;
def_moved = 1;
{
int i;
- for (i = NUM_FIXED_BLOCKS; i < n_basic_blocks; i++)
+ for (i = NUM_FIXED_BLOCKS; i < last_basic_block; i++)
{
basic_block bb = BASIC_BLOCK (i);
fprintf(dump_file,
CLEAR_HARD_REG_SET (all_btrs);
for (first_btr = -1, reg = 0; reg < FIRST_PSEUDO_REGISTER; reg++)
if (TEST_HARD_REG_BIT (reg_class_contents[(int) btr_class], reg)
- && (allow_callee_save || call_used_regs[reg]
+ && (allow_callee_save || call_used_regs[reg]
|| df_regs_ever_live_p (reg)))
{
SET_HARD_REG_BIT (all_btrs, reg);
first_btr = reg;
}
- btrs_live = XCNEWVEC (HARD_REG_SET, n_basic_blocks);
- btrs_live_at_end = XCNEWVEC (HARD_REG_SET, n_basic_blocks);
+ btrs_live = XCNEWVEC (HARD_REG_SET, last_basic_block);
+ btrs_live_at_end = XCNEWVEC (HARD_REG_SET, last_basic_block);
build_btr_def_use_webs (all_btr_defs);
static void
branch_target_load_optimize (bool after_prologue_epilogue_gen)
{
- enum reg_class class = targetm.branch_target_register_class ();
- if (class != NO_REGS)
+ enum reg_class klass = targetm.branch_target_register_class ();
+ if (klass != NO_REGS)
{
/* Initialize issue_rate. */
if (targetm.sched.issue_rate)
/* Dominator info is also needed for migrate_btr_def. */
calculate_dominance_info (CDI_DOMINATORS);
- migrate_btr_defs (class,
+ migrate_btr_defs (klass,
(targetm.branch_target_register_callee_saved
(after_prologue_epilogue_gen)));
NULL, /* sub */
NULL, /* next */
0, /* static_pass_number */
- 0, /* tv_id */
+ TV_NONE, /* tv_id */
0, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
NULL, /* sub */
NULL, /* next */
0, /* static_pass_number */
- 0, /* tv_id */
+ TV_NONE, /* tv_id */
0, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
TODO_ggc_collect, /* todo_flags_finish */
}
};
-
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