/* IRA allocation based on graph coloring.
- Copyright (C) 2006, 2007, 2008, 2009
+ Copyright (C) 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
Contributed by Vladimir Makarov <vmakarov@redhat.com>.
continue;
cost = (cp->second == allocno
- ? ira_register_move_cost[mode][rclass][cover_class]
- : ira_register_move_cost[mode][cover_class][rclass]);
+ ? ira_get_register_move_cost (mode, rclass, cover_class)
+ : ira_get_register_move_cost (mode, cover_class, rclass));
if (decr_p)
cost = -cost;
{
HARD_REG_SET conflicting_regs;
int i, j, k, hard_regno, best_hard_regno, class_size;
- int cost, mem_cost, min_cost, full_cost, min_full_cost, add_cost;
+ int cost, mem_cost, min_cost, full_cost, min_full_cost;
int *a_costs;
int *conflict_costs;
- enum reg_class cover_class, rclass, conflict_cover_class;
+ enum reg_class cover_class, conflict_cover_class;
enum machine_mode mode;
ira_allocno_t a, conflict_allocno;
ira_allocno_conflict_iterator aci;
static int costs[FIRST_PSEUDO_REGISTER], full_costs[FIRST_PSEUDO_REGISTER];
+#ifndef HONOR_REG_ALLOC_ORDER
+ enum reg_class rclass;
+ int add_cost;
+#endif
#ifdef STACK_REGS
bool no_stack_reg_p;
#endif
continue;
cost = costs[i];
full_cost = full_costs[i];
+#ifndef HONOR_REG_ALLOC_ORDER
if (! allocated_hardreg_p[hard_regno]
&& ira_hard_reg_not_in_set_p (hard_regno, mode, call_used_reg_set))
/* We need to save/restore the hard register in
cost += add_cost;
full_cost += add_cost;
}
+#endif
if (min_cost > cost)
min_cost = cost;
if (min_full_cost > full_cost)
if (a == allocno)
break;
}
- qsort (sorted_allocnos, j, sizeof (ira_allocno_t),
+ qsort (sorted_allocnos, j, sizeof (ira_allocno_t),
allocno_cost_compare_func);
for (i = 0; i < j; i++)
{
ira_allocno_t a, conflict_allocno;
enum reg_class cover_class;
ira_allocno_conflict_iterator aci;
-
+
ALLOCNO_IN_GRAPH_P (allocno) = false;
VEC_safe_push (ira_allocno_t, heap, allocno_stack_vec, allocno);
cover_class = ALLOCNO_COVER_CLASS (allocno);
}
/* Return the frequency of exit edges (if EXIT_P) or entry from/to the
- loop given by its LOOP_NODE. */
+ loop given by its LOOP_NODE. */
int
ira_loop_edge_freq (ira_loop_tree_node_t loop_node, int regno, bool exit_p)
{
* ira_loop_edge_freq (loop_node, regno, true)
+ ira_memory_move_cost[mode][rclass][0]
* ira_loop_edge_freq (loop_node, regno, false))
- - (ira_register_move_cost[mode][rclass][rclass]
+ - (ira_get_register_move_cost (mode, rclass, rclass)
* (ira_loop_edge_freq (loop_node, regno, false)
+ ira_loop_edge_freq (loop_node, regno, true))));
return cost;
{
int pri1, pri2, diff;
ira_allocno_t a1 = (ira_allocno_t) k1, a2 = (ira_allocno_t) k2;
-
+
pri1 = (ALLOCNO_TEMP (a1)
/ (ALLOCNO_LEFT_CONFLICTS_SIZE (a1)
* ira_reg_class_nregs[ALLOCNO_COVER_CLASS (a1)][ALLOCNO_MODE (a1)]
&& (allocno_pri > i_allocno_pri
|| (allocno_pri == i_allocno_pri
&& (allocno_cost > i_allocno_cost
- || (allocno_cost == i_allocno_cost
+ || (allocno_cost == i_allocno_cost
&& (ALLOCNO_NUM (allocno)
> ALLOCNO_NUM (i_allocno))))))))
{
static void
setup_allocno_available_regs_num (ira_allocno_t allocno)
{
- int i, n, hard_regs_num;
+ int i, n, hard_regs_num, hard_regno;
+ enum machine_mode mode;
enum reg_class cover_class;
ira_allocno_t a;
HARD_REG_SET temp_set;
if (a == allocno)
break;
}
+ mode = ALLOCNO_MODE (allocno);
for (n = 0, i = hard_regs_num - 1; i >= 0; i--)
- if (TEST_HARD_REG_BIT (temp_set, ira_class_hard_regs[cover_class][i]))
- n++;
+ {
+ hard_regno = ira_class_hard_regs[cover_class][i];
+ if (TEST_HARD_REG_BIT (temp_set, hard_regno)
+ || TEST_HARD_REG_BIT (prohibited_class_mode_regs[cover_class][mode],
+ hard_regno))
+ n++;
+ }
if (internal_flag_ira_verbose > 2 && n > 0 && ira_dump_file != NULL)
fprintf (ira_dump_file, " Reg %d of %s has %d regs less\n",
ALLOCNO_REGNO (allocno), reg_class_names[cover_class], n);
int last = (hard_regno
+ hard_regno_nregs
[hard_regno][ALLOCNO_MODE (conflict_allocno)]);
-
+
while (hard_regno < last)
{
if (! TEST_HARD_REG_BIT (temp_set, hard_regno))
static void
put_allocno_into_bucket (ira_allocno_t allocno)
{
- int hard_regs_num;
enum reg_class cover_class;
cover_class = ALLOCNO_COVER_CLASS (allocno);
- hard_regs_num = ira_class_hard_regs_num[cover_class];
if (ALLOCNO_FIRST_COALESCED_ALLOCNO (allocno) != allocno)
return;
ALLOCNO_IN_GRAPH_P (allocno) = true;
for (j = 0; (int) j < ira_reg_class_cover_size; j++)
{
enum reg_class cover_class;
-
+
cover_class = ira_reg_class_cover[j];
if (loop_tree_node->reg_pressure[cover_class] == 0)
continue;
else
{
cover_class = ALLOCNO_COVER_CLASS (subloop_allocno);
- cost = (ira_register_move_cost[mode][rclass][rclass]
+ cost = (ira_get_register_move_cost (mode, rclass, rclass)
* (exit_freq + enter_freq));
ira_allocate_and_set_or_copy_costs
(&ALLOCNO_UPDATED_HARD_REG_COSTS (subloop_allocno), cover_class,
100);
if (internal_flag_ira_verbose > 0 && ira_dump_file != NULL)
fprintf (ira_dump_file, "\n**** Allocnos coloring:\n\n");
-
+
ira_traverse_loop_tree (false, ira_loop_tree_root, color_pass, NULL);
if (internal_flag_ira_verbose > 1 && ira_dump_file != NULL)
+= (ira_memory_move_cost[mode][rclass][0] * exit_freq
+ ira_memory_move_cost[mode][rclass][1] * enter_freq);
if (hard_regno2 != hard_regno)
- cost -= (ira_register_move_cost[mode][rclass][rclass]
+ cost -= (ira_get_register_move_cost (mode, rclass, rclass)
* (exit_freq + enter_freq));
}
}
+= (ira_memory_move_cost[mode][rclass][1] * exit_freq
+ ira_memory_move_cost[mode][rclass][0] * enter_freq);
if (hard_regno2 != hard_regno)
- cost -= (ira_register_move_cost[mode][rclass][rclass]
+ cost -= (ira_get_register_move_cost (mode, rclass, rclass)
* (exit_freq + enter_freq));
}
}
ira_allocno_t another_a;
ira_copy_t cp, next_cp;
+ ira_free_allocno_updated_costs (a);
ira_assert (! ALLOCNO_ASSIGNED_P (a));
cover_class = ALLOCNO_COVER_CLASS (a);
if (cover_class == NO_REGS)
if (i < 0)
continue;
cost = (cp->first == a
- ? ira_register_move_cost[mode][rclass][cover_class]
- : ira_register_move_cost[mode][cover_class][rclass]);
+ ? ira_get_register_move_cost (mode, rclass, cover_class)
+ : ira_get_register_move_cost (mode, cover_class, rclass));
ira_allocate_and_set_or_copy_costs
(&ALLOCNO_UPDATED_HARD_REG_COSTS (a),
cover_class, ALLOCNO_COVER_CLASS_COST (a),
{
a = sorted_allocnos[i];
ALLOCNO_ASSIGNED_P (a) = false;
- ira_assert (ALLOCNO_UPDATED_HARD_REG_COSTS (a) == NULL);
- ira_assert (ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a) == NULL);
update_curr_costs (a);
}
for (i = 0; i < allocnos_to_color_num; i++)
ALLOCNO_NUM (a), ALLOCNO_REGNO (a), ALLOCNO_FREQ (a),
MAX (PSEUDO_REGNO_BYTES (ALLOCNO_REGNO (a)),
reg_max_ref_width[ALLOCNO_REGNO (a)]));
-
+
if (a == allocno)
break;
}
int hard_regno;
enum reg_class cover_class;
int regno = ALLOCNO_REGNO (a);
+ HARD_REG_SET saved;
+ COPY_HARD_REG_SET (saved, ALLOCNO_TOTAL_CONFLICT_HARD_REGS (a));
IOR_HARD_REG_SET (ALLOCNO_TOTAL_CONFLICT_HARD_REGS (a), forbidden_regs);
if (! flag_caller_saves && ALLOCNO_CALLS_CROSSED_NUM (a) != 0)
IOR_HARD_REG_SET (ALLOCNO_TOTAL_CONFLICT_HARD_REGS (a), call_used_reg_set);
ALLOCNO_ASSIGNED_P (a) = false;
- ira_assert (ALLOCNO_UPDATED_HARD_REG_COSTS (a) == NULL);
- ira_assert (ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a) == NULL);
cover_class = ALLOCNO_COVER_CLASS (a);
update_curr_costs (a);
assign_hard_reg (a, true);
}
else if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
fprintf (ira_dump_file, "\n");
-
+ COPY_HARD_REG_SET (ALLOCNO_TOTAL_CONFLICT_HARD_REGS (a), saved);
return reg_renumber[regno] >= 0;
}
ira_reassign_pseudos (int *spilled_pseudo_regs, int num,
HARD_REG_SET bad_spill_regs,
HARD_REG_SET *pseudo_forbidden_regs,
- HARD_REG_SET *pseudo_previous_regs, bitmap spilled)
+ HARD_REG_SET *pseudo_previous_regs,
+ bitmap spilled)
{
- int i, m, n, regno;
+ int i, n, regno;
bool changed_p;
ira_allocno_t a, conflict_a;
HARD_REG_SET forbidden_regs;
ira_allocno_conflict_iterator aci;
+ bitmap temp = BITMAP_ALLOC (NULL);
+
+ /* Add pseudos which conflict with pseudos already in
+ SPILLED_PSEUDO_REGS to SPILLED_PSEUDO_REGS. This is preferable
+ to allocating in two steps as some of the conflicts might have
+ a higher priority than the pseudos passed in SPILLED_PSEUDO_REGS. */
+ for (i = 0; i < num; i++)
+ bitmap_set_bit (temp, spilled_pseudo_regs[i]);
+
+ for (i = 0, n = num; i < n; i++)
+ {
+ int regno = spilled_pseudo_regs[i];
+ bitmap_set_bit (temp, regno);
+
+ a = ira_regno_allocno_map[regno];
+ FOR_EACH_ALLOCNO_CONFLICT (a, conflict_a, aci)
+ if (ALLOCNO_HARD_REGNO (conflict_a) < 0
+ && ! ALLOCNO_DONT_REASSIGN_P (conflict_a)
+ && ! bitmap_bit_p (temp, ALLOCNO_REGNO (conflict_a)))
+ {
+ spilled_pseudo_regs[num++] = ALLOCNO_REGNO (conflict_a);
+ bitmap_set_bit (temp, ALLOCNO_REGNO (conflict_a));
+ /* ?!? This seems wrong. */
+ bitmap_set_bit (consideration_allocno_bitmap,
+ ALLOCNO_NUM (conflict_a));
+ }
+ }
if (num > 1)
qsort (spilled_pseudo_regs, num, sizeof (int), pseudo_reg_compare);
changed_p = false;
/* Try to assign hard registers to pseudos from
SPILLED_PSEUDO_REGS. */
- for (m = i = 0; i < num; i++)
+ for (i = 0; i < num; i++)
{
regno = spilled_pseudo_regs[i];
COPY_HARD_REG_SET (forbidden_regs, bad_spill_regs);
ira_assert (reg_renumber[regno] < 0);
if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
fprintf (ira_dump_file,
- " Spill %d(a%d), cost=%d", regno, ALLOCNO_NUM (a),
+ " Try Assign %d(a%d), cost=%d", regno, ALLOCNO_NUM (a),
ALLOCNO_MEMORY_COST (a)
- ALLOCNO_COVER_CLASS_COST (a));
allocno_reload_assign (a, forbidden_regs);
CLEAR_REGNO_REG_SET (spilled, regno);
changed_p = true;
}
- else
- spilled_pseudo_regs[m++] = regno;
- }
- if (m == 0)
- return changed_p;
- if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
- {
- fprintf (ira_dump_file, " Spilled regs");
- for (i = 0; i < m; i++)
- fprintf (ira_dump_file, " %d", spilled_pseudo_regs[i]);
- fprintf (ira_dump_file, "\n");
- }
- /* Try to assign hard registers to pseudos conflicting with ones
- from SPILLED_PSEUDO_REGS. */
- for (i = n = 0; i < m; i++)
- {
- regno = spilled_pseudo_regs[i];
- a = ira_regno_allocno_map[regno];
- FOR_EACH_ALLOCNO_CONFLICT (a, conflict_a, aci)
- if (ALLOCNO_HARD_REGNO (conflict_a) < 0
- && ! ALLOCNO_DONT_REASSIGN_P (conflict_a)
- && ! bitmap_bit_p (consideration_allocno_bitmap,
- ALLOCNO_NUM (conflict_a)))
- {
- sorted_allocnos[n++] = conflict_a;
- bitmap_set_bit (consideration_allocno_bitmap,
- ALLOCNO_NUM (conflict_a));
- }
- }
- if (n != 0)
- {
- setup_allocno_priorities (sorted_allocnos, n);
- qsort (sorted_allocnos, n, sizeof (ira_allocno_t),
- allocno_priority_compare_func);
- for (i = 0; i < n; i++)
- {
- a = sorted_allocnos[i];
- regno = ALLOCNO_REGNO (a);
- COPY_HARD_REG_SET (forbidden_regs, bad_spill_regs);
- IOR_HARD_REG_SET (forbidden_regs, pseudo_forbidden_regs[regno]);
- IOR_HARD_REG_SET (forbidden_regs, pseudo_previous_regs[regno]);
- if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
- fprintf (ira_dump_file,
- " Try assign %d(a%d), cost=%d",
- regno, ALLOCNO_NUM (a),
- ALLOCNO_MEMORY_COST (a)
- - ALLOCNO_COVER_CLASS_COST (a));
- if (allocno_reload_assign (a, forbidden_regs))
- {
- changed_p = true;
- bitmap_clear_bit (spilled, regno);
- }
- }
}
+ BITMAP_FREE (temp);
return changed_p;
}
if (slot->width < total_size
|| GET_MODE_SIZE (GET_MODE (slot->mem)) < inherent_size)
continue;
-
+
EXECUTE_IF_SET_IN_BITMAP (&slot->spilled_regs,
FIRST_PSEUDO_REGISTER, i, bi)
{
int call_used_count, other_call_used_count;
int hard_regno, other_hard_regno;
- cost = calculate_spill_cost (regnos, in, out, insn,
+ cost = calculate_spill_cost (regnos, in, out, insn,
&length, &nrefs, &call_used_count, &hard_regno);
other_cost = calculate_spill_cost (other_regnos, in, out, insn,
&other_length, &other_nrefs,
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