/* IRA conflict builder.
- Copyright (C) 2006, 2007, 2008
+ Copyright (C) 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
Contributed by Vladimir Makarov <vmakarov@redhat.com>.
#include "df.h"
#include "sparseset.h"
#include "ira-int.h"
+#include "addresses.h"
/* This file contains code responsible for allocno conflict creation,
allocno copy creation and allocno info accumulation on upper level
\f
-/* Build allocno conflict table by processing allocno live ranges. */
-static void
+/* Build allocno conflict table by processing allocno live ranges.
+ Return true if the table was built. The table is not built if it
+ is too big. */
+static bool
build_conflict_bit_table (void)
{
int i, num, id, allocated_words_num, conflict_bit_vec_words_num;
int allocno_set_words;
allocno_set_words = (ira_allocnos_num + IRA_INT_BITS - 1) / IRA_INT_BITS;
+ allocated_words_num = 0;
+ FOR_EACH_ALLOCNO (allocno, ai)
+ {
+ if (ALLOCNO_MAX (allocno) < ALLOCNO_MIN (allocno))
+ continue;
+ conflict_bit_vec_words_num
+ = ((ALLOCNO_MAX (allocno) - ALLOCNO_MIN (allocno) + IRA_INT_BITS)
+ / IRA_INT_BITS);
+ allocated_words_num += conflict_bit_vec_words_num;
+ if ((unsigned long long) allocated_words_num * sizeof (IRA_INT_TYPE)
+ > (unsigned long long) IRA_MAX_CONFLICT_TABLE_SIZE * 1024 * 1024)
+ {
+ if (internal_flag_ira_verbose > 0 && ira_dump_file != NULL)
+ fprintf
+ (ira_dump_file,
+ "+++Conflict table will be too big(>%dMB) -- don't use it\n",
+ IRA_MAX_CONFLICT_TABLE_SIZE);
+ return false;
+ }
+ }
allocnos_live = sparseset_alloc (ira_allocnos_num);
conflicts = (IRA_INT_TYPE **) ira_allocate (sizeof (IRA_INT_TYPE *)
* ira_allocnos_num);
EXECUTE_IF_SET_IN_SPARSESET (allocnos_live, j)
{
live_a = ira_allocnos[j];
- if (cover_class == ALLOCNO_COVER_CLASS (live_a)
+ if (ira_reg_classes_intersect_p
+ [cover_class][ALLOCNO_COVER_CLASS (live_a)]
/* Don't set up conflict for the allocno with itself. */
&& num != (int) j)
{
sparseset_clear_bit (allocnos_live, ALLOCNO_NUM (r->allocno));
}
sparseset_free (allocnos_live);
+ return true;
}
\f
/* Can not be tied. It is not in the cover class. */
return false;
if (HARD_REGISTER_P (reg1))
- cost = ira_register_move_cost[mode][cover_class][rclass] * freq;
+ cost = ira_get_register_move_cost (mode, cover_class, rclass) * freq;
else
- cost = ira_register_move_cost[mode][rclass][cover_class] * freq;
+ cost = ira_get_register_move_cost (mode, rclass, cover_class) * freq;
for (;;)
{
ira_allocate_and_set_costs
}
}
-/* Return TRUE if live ranges of allocnos A1 and A2 intersect. It is
- used to find a conflict for new allocnos or allocnos with the
- different cover classes. */
-bool
-ira_allocno_live_ranges_intersect_p (ira_allocno_t a1, ira_allocno_t a2)
-{
- allocno_live_range_t r1, r2;
-
- if (a1 == a2)
- return false;
- if (ALLOCNO_REG (a1) != NULL && ALLOCNO_REG (a2) != NULL
- && (ORIGINAL_REGNO (ALLOCNO_REG (a1))
- == ORIGINAL_REGNO (ALLOCNO_REG (a2))))
- return false;
- /* Remember the ranges are always kept ordered. */
- for (r1 = ALLOCNO_LIVE_RANGES (a1), r2 = ALLOCNO_LIVE_RANGES (a2);
- r1 != NULL && r2 != NULL;)
- {
- if (r1->start > r2->finish)
- r1 = r1->next;
- else if (r2->start > r1->finish)
- r2 = r2->next;
- else
- return true;
- }
- return false;
-}
-
-/* Return TRUE if live ranges of pseudo-registers REGNO1 and REGNO2
- intersect. This should be used when there is only one region.
- Currently this is used during reload. */
-bool
-ira_pseudo_live_ranges_intersect_p (int regno1, int regno2)
-{
- ira_allocno_t a1, a2;
-
- ira_assert (regno1 >= FIRST_PSEUDO_REGISTER
- && regno2 >= FIRST_PSEUDO_REGISTER);
- /* Reg info caclulated by dataflow infrastructure can be different
- from one calculated by regclass. */
- if ((a1 = ira_loop_tree_root->regno_allocno_map[regno1]) == NULL
- || (a2 = ira_loop_tree_root->regno_allocno_map[regno2]) == NULL)
- return false;
- return ira_allocno_live_ranges_intersect_p (a1, a2);
-}
-
/* Array used to collect all conflict allocnos for given allocno. */
static ira_allocno_t *collected_conflict_allocnos;
ALLOCNO_MIN (a), ALLOCNO_MAX (a), i, asi)
{
another_a = ira_conflict_id_allocno_map[i];
- ira_assert (ALLOCNO_COVER_CLASS (a)
- == ALLOCNO_COVER_CLASS (another_a));
+ ira_assert (ira_reg_classes_intersect_p
+ [ALLOCNO_COVER_CLASS (a)][ALLOCNO_COVER_CLASS (another_a)]);
collected_conflict_allocnos[px++] = another_a;
}
if (ira_conflict_vector_profitable_p (a, px))
ALLOCNO_MIN (a), ALLOCNO_MAX (a), i, asi)
{
another_a = ira_conflict_id_allocno_map[i];
- ira_assert (ALLOCNO_COVER_CLASS (a)
- == ALLOCNO_COVER_CLASS (another_a));
+ ira_assert (ira_reg_classes_intersect_p
+ [ALLOCNO_COVER_CLASS (a)][ALLOCNO_COVER_CLASS (another_a)]);
if ((another_parent_a = ALLOCNO_CAP (another_a)) == NULL
&& (another_parent_a = (parent->regno_allocno_map
[ALLOCNO_REGNO (another_a)])) == NULL)
{
ira_allocno_t a;
ira_allocno_iterator ai;
+ HARD_REG_SET temp_hard_reg_set;
- if (optimize)
+ if (ira_conflicts_p)
{
- build_conflict_bit_table ();
- build_conflicts ();
- ira_traverse_loop_tree (true, ira_loop_tree_root, NULL, add_copies);
- /* We need finished conflict table for the subsequent call. */
- if (flag_ira_algorithm == IRA_ALGORITHM_REGIONAL
- || flag_ira_algorithm == IRA_ALGORITHM_MIXED)
- propagate_copies ();
- /* Now we can free memory for the conflict table (see function
- build_allocno_conflicts for details). */
- FOR_EACH_ALLOCNO (a, ai)
+ ira_conflicts_p = build_conflict_bit_table ();
+ if (ira_conflicts_p)
{
- if (ALLOCNO_CONFLICT_ALLOCNO_ARRAY (a) != conflicts[ALLOCNO_NUM (a)])
- ira_free (conflicts[ALLOCNO_NUM (a)]);
+ build_conflicts ();
+ ira_traverse_loop_tree (true, ira_loop_tree_root, NULL, add_copies);
+ /* We need finished conflict table for the subsequent call. */
+ if (flag_ira_region == IRA_REGION_ALL
+ || flag_ira_region == IRA_REGION_MIXED)
+ propagate_copies ();
+ /* Now we can free memory for the conflict table (see function
+ build_allocno_conflicts for details). */
+ FOR_EACH_ALLOCNO (a, ai)
+ {
+ if (ALLOCNO_CONFLICT_ALLOCNO_ARRAY (a)
+ != conflicts[ALLOCNO_NUM (a)])
+ ira_free (conflicts[ALLOCNO_NUM (a)]);
+ }
+ ira_free (conflicts);
}
- ira_free (conflicts);
+ }
+ if (! CLASS_LIKELY_SPILLED_P (base_reg_class (VOIDmode, ADDRESS, SCRATCH)))
+ CLEAR_HARD_REG_SET (temp_hard_reg_set);
+ else
+ {
+ COPY_HARD_REG_SET (temp_hard_reg_set,
+ reg_class_contents[base_reg_class (VOIDmode, ADDRESS, SCRATCH)]);
+ AND_COMPL_HARD_REG_SET (temp_hard_reg_set, ira_no_alloc_regs);
+ AND_HARD_REG_SET (temp_hard_reg_set, call_used_reg_set);
}
FOR_EACH_ALLOCNO (a, ai)
{
- if (ALLOCNO_CALLS_CROSSED_NUM (a) == 0)
- continue;
- if (! flag_caller_saves)
+ reg_attrs *attrs;
+ tree decl;
+
+ if ((! flag_caller_saves && ALLOCNO_CALLS_CROSSED_NUM (a) != 0)
+ /* For debugging purposes don't put user defined variables in
+ callee-clobbered registers. */
+ || (optimize == 0
+ && (attrs = REG_ATTRS (regno_reg_rtx [ALLOCNO_REGNO (a)])) != NULL
+ && (decl = attrs->decl) != NULL
+ && VAR_OR_FUNCTION_DECL_P (decl)
+ && ! DECL_ARTIFICIAL (decl)))
{
IOR_HARD_REG_SET (ALLOCNO_TOTAL_CONFLICT_HARD_REGS (a),
call_used_reg_set);
- if (ALLOCNO_CALLS_CROSSED_NUM (a) != 0)
- IOR_HARD_REG_SET (ALLOCNO_CONFLICT_HARD_REGS (a),
- call_used_reg_set);
+ IOR_HARD_REG_SET (ALLOCNO_CONFLICT_HARD_REGS (a),
+ call_used_reg_set);
}
- else
+ else if (ALLOCNO_CALLS_CROSSED_NUM (a) != 0)
{
IOR_HARD_REG_SET (ALLOCNO_TOTAL_CONFLICT_HARD_REGS (a),
no_caller_save_reg_set);
- if (ALLOCNO_CALLS_CROSSED_NUM (a) != 0)
- IOR_HARD_REG_SET (ALLOCNO_CONFLICT_HARD_REGS (a),
- no_caller_save_reg_set);
+ IOR_HARD_REG_SET (ALLOCNO_TOTAL_CONFLICT_HARD_REGS (a),
+ temp_hard_reg_set);
+ IOR_HARD_REG_SET (ALLOCNO_CONFLICT_HARD_REGS (a),
+ no_caller_save_reg_set);
+ IOR_HARD_REG_SET (ALLOCNO_CONFLICT_HARD_REGS (a),
+ temp_hard_reg_set);
}
}
- if (optimize && internal_flag_ira_verbose > 2 && ira_dump_file != NULL)
+ if (optimize && ira_conflicts_p
+ && internal_flag_ira_verbose > 2 && ira_dump_file != NULL)
print_conflicts (ira_dump_file, false);
}
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