/* Liveness for SSA trees.
- Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
Contributed by Andrew MacLeod <amacleod@redhat.com>
This file is part of GCC.
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, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
#include "config.h"
#include "system.h"
#include "hashtab.h"
#include "tree-dump.h"
#include "tree-ssa-live.h"
-#include "errors.h"
+#include "toplev.h"
-static void live_worklist (tree_live_info_p, varray_type, int);
+static void live_worklist (tree_live_info_p, int *, int);
static tree_live_info_p new_tree_live_info (var_map);
static inline void set_if_valid (var_map, bitmap, tree);
static inline void add_livein_if_notdef (tree_live_info_p, bitmap,
compact_var_map (var_map map, int flags)
{
sbitmap used;
- int x, limit, count, tmp, root, root_i;
+ int tmp, root, root_i;
+ unsigned int x, limit, count;
tree var;
root_var_p rv = NULL;
/* Build a compacted partitioning. */
if (count != limit)
{
+ sbitmap_iterator sbi;
+
map->compact_to_partition = (int *)xmalloc (count * sizeof (int));
count = 0;
/* SSA renaming begins at 1, so skip 0 when compacting. */
- EXECUTE_IF_SET_IN_SBITMAP (used, 1, x,
+ EXECUTE_IF_SET_IN_SBITMAP (used, 1, x, sbi)
{
map->partition_to_compact[x] = count;
map->compact_to_partition[count] = x;
if (TREE_CODE (var) != SSA_NAME)
change_partition_var (map, var, count);
count++;
- });
+ }
}
else
{
map->partition_to_var[map->compact_to_partition[part]] = var;
}
+static inline void mark_all_vars_used (tree *);
/* Helper function for mark_all_vars_used, called via walk_tree. */
{
tree t = *tp;
+ /* Ignore TREE_ORIGINAL for TARGET_MEM_REFS, as well as other
+ fields that do not contain vars. */
+ if (TREE_CODE (t) == TARGET_MEM_REF)
+ {
+ mark_all_vars_used (&TMR_SYMBOL (t));
+ mark_all_vars_used (&TMR_BASE (t));
+ mark_all_vars_used (&TMR_INDEX (t));
+ *walk_subtrees = 0;
+ return NULL;
+ }
+
/* Only need to mark VAR_DECLS; parameters and return results are not
eliminated as unused. */
if (TREE_CODE (t) == VAR_DECL)
basic_block bb;
tree dest, use;
tree stmt;
- stmt_ann_t ann;
var_map map;
ssa_op_iter iter;
#ifdef ENABLE_CHECKING
- sbitmap used_in_real_ops;
- sbitmap used_in_virtual_ops;
+ bitmap used_in_real_ops;
+ bitmap used_in_virtual_ops;
#endif
map = init_var_map (num_ssa_names + 1);
#ifdef ENABLE_CHECKING
- used_in_real_ops = sbitmap_alloc (num_referenced_vars);
- sbitmap_zero (used_in_real_ops);
-
- used_in_virtual_ops = sbitmap_alloc (num_referenced_vars);
- sbitmap_zero (used_in_virtual_ops);
+ used_in_real_ops = BITMAP_ALLOC (NULL);
+ used_in_virtual_ops = BITMAP_ALLOC (NULL);
#endif
if (flags & SSA_VAR_MAP_REF_COUNT)
for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
{
stmt = bsi_stmt (bsi);
- get_stmt_operands (stmt);
- ann = stmt_ann (stmt);
/* Register USE and DEF operands in each statement. */
FOR_EACH_SSA_TREE_OPERAND (use , stmt, iter, SSA_OP_USE)
register_ssa_partition (map, use, true);
#ifdef ENABLE_CHECKING
- SET_BIT (used_in_real_ops, var_ann (SSA_NAME_VAR (use))->uid);
+ bitmap_set_bit (used_in_real_ops, DECL_UID (SSA_NAME_VAR (use)));
#endif
}
register_ssa_partition (map, dest, false);
#ifdef ENABLE_CHECKING
- SET_BIT (used_in_real_ops, var_ann (SSA_NAME_VAR (dest))->uid);
+ bitmap_set_bit (used_in_real_ops, DECL_UID (SSA_NAME_VAR (dest)));
#endif
}
FOR_EACH_SSA_TREE_OPERAND (use, stmt, iter,
SSA_OP_VIRTUAL_USES | SSA_OP_VMUSTDEF)
{
- SET_BIT (used_in_virtual_ops, var_ann (SSA_NAME_VAR (use))->uid);
+ bitmap_set_bit (used_in_virtual_ops,
+ DECL_UID (SSA_NAME_VAR (use)));
}
#endif /* ENABLE_CHECKING */
#if defined ENABLE_CHECKING
{
unsigned i;
- sbitmap both = sbitmap_alloc (num_referenced_vars);
- sbitmap_a_and_b (both, used_in_real_ops, used_in_virtual_ops);
- if (sbitmap_first_set_bit (both) >= 0)
+ bitmap both = BITMAP_ALLOC (NULL);
+ bitmap_and (both, used_in_real_ops, used_in_virtual_ops);
+ if (!bitmap_empty_p (both))
{
- EXECUTE_IF_SET_IN_SBITMAP (both, 0, i,
+ bitmap_iterator bi;
+
+ EXECUTE_IF_SET_IN_BITMAP (both, 0, i, bi)
fprintf (stderr, "Variable %s used in real and virtual operands\n",
- get_name (referenced_var (i))));
+ get_name (referenced_var (i)));
internal_error ("SSA corruption");
}
- sbitmap_free (used_in_real_ops);
- sbitmap_free (used_in_virtual_ops);
- sbitmap_free (both);
+ BITMAP_FREE (used_in_real_ops);
+ BITMAP_FREE (used_in_virtual_ops);
+ BITMAP_FREE (both);
}
#endif
live->map = map;
live->num_blocks = last_basic_block;
- live->global = BITMAP_XMALLOC ();
+ live->global = BITMAP_ALLOC (NULL);
live->livein = (bitmap *)xmalloc (num_var_partitions (map) * sizeof (bitmap));
for (x = 0; x < num_var_partitions (map); x++)
- live->livein[x] = BITMAP_XMALLOC ();
+ live->livein[x] = BITMAP_ALLOC (NULL);
/* liveout is deferred until it is actually requested. */
live->liveout = NULL;
if (live->liveout)
{
for (x = live->num_blocks - 1; x >= 0; x--)
- BITMAP_XFREE (live->liveout[x]);
+ BITMAP_FREE (live->liveout[x]);
free (live->liveout);
}
if (live->livein)
{
for (x = num_var_partitions (live->map) - 1; x >= 0; x--)
- BITMAP_XFREE (live->livein[x]);
+ BITMAP_FREE (live->livein[x]);
free (live->livein);
}
if (live->global)
- BITMAP_XFREE (live->global);
+ BITMAP_FREE (live->global);
free (live);
}
passed in rather than being allocated on every call. */
static void
-live_worklist (tree_live_info_p live, varray_type stack, int i)
+live_worklist (tree_live_info_p live, int *stack, int i)
{
unsigned b;
tree var;
var_map map = live->map;
edge_iterator ei;
bitmap_iterator bi;
+ int *tos = stack;
var = partition_to_var (map, i);
if (SSA_NAME_DEF_STMT (var))
EXECUTE_IF_SET_IN_BITMAP (live->livein[i], 0, b, bi)
{
- VARRAY_PUSH_INT (stack, b);
+ *tos++ = b;
}
- while (VARRAY_ACTIVE_SIZE (stack) > 0)
+ while (tos != stack)
{
- b = VARRAY_TOP_INT (stack);
- VARRAY_POP (stack);
+ b = *--tos;
FOR_EACH_EDGE (e, ei, BASIC_BLOCK (b)->preds)
if (e->src != ENTRY_BLOCK_PTR)
if (!bitmap_bit_p (live->livein[i], e->src->index))
{
bitmap_set_bit (live->livein[i], e->src->index);
- VARRAY_PUSH_INT (stack, e->src->index);
+ *tos++ = e->src->index;
}
}
}
tree phi, var, stmt;
tree op;
edge e;
- varray_type stack;
+ int *stack;
block_stmt_iterator bsi;
- stmt_ann_t ann;
ssa_op_iter iter;
bitmap_iterator bi;
#ifdef ENABLE_CHECKING
edge_iterator ei;
#endif
- saw_def = BITMAP_XMALLOC ();
+ saw_def = BITMAP_ALLOC (NULL);
live = new_tree_live_info (map);
if (!phi_ssa_name_p (var))
continue;
stmt = SSA_NAME_DEF_STMT (var);
- e = PHI_ARG_EDGE (phi, i);
+ e = EDGE_PRED (bb, i);
/* Any uses in PHIs which either don't have def's or are not
defined in the block from which the def comes, will be live
for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
{
stmt = bsi_stmt (bsi);
- get_stmt_operands (stmt);
- ann = stmt_ann (stmt);
FOR_EACH_SSA_TREE_OPERAND (op, stmt, iter, SSA_OP_USE)
{
}
}
- VARRAY_INT_INIT (stack, last_basic_block, "stack");
+ stack = xmalloc (sizeof (int) * last_basic_block);
EXECUTE_IF_SET_IN_BITMAP (live->global, 0, i, bi)
{
live_worklist (live, stack, i);
}
+ free (stack);
#ifdef ENABLE_CHECKING
/* Check for live on entry partitions and report those with a DEF in
gcc_assert (num <= 0);
#endif
- BITMAP_XFREE (saw_def);
+ BITMAP_FREE (saw_def);
return live;
}
on_exit = (bitmap *)xmalloc (last_basic_block * sizeof (bitmap));
for (x = 0; x < (unsigned)last_basic_block; x++)
- on_exit[x] = BITMAP_XMALLOC ();
+ on_exit[x] = BITMAP_ALLOC (NULL);
/* Set all the live-on-exit bits for uses in PHIs. */
FOR_EACH_BB (bb)
memset (tpa->partition_to_tree_map, TPA_NONE, num_partitions * sizeof (int));
x = MAX (40, (num_partitions / 20));
- VARRAY_TREE_INIT (tpa->trees, x, "trees");
+ tpa->trees = VEC_alloc (tree, heap, x);
VARRAY_INT_INIT (tpa->first_partition, x, "first_partition");
return tpa;
if (!tpa)
return;
+ VEC_free (tree, heap, tpa->trees);
free (tpa->partition_to_tree_map);
free (tpa->next_partition);
free (tpa);
of the tree list. */
if (tpa_next_partition (tpa, first) == NO_PARTITION)
{
- swap_t = VARRAY_TREE (tpa->trees, last);
+ swap_t = VEC_index (tree, tpa->trees, last);
swap_i = VARRAY_INT (tpa->first_partition, last);
/* Update the last entry. Since it is known to only have one
partition, there is nothing else to update. */
- VARRAY_TREE (tpa->trees, last) = VARRAY_TREE (tpa->trees, x);
+ VEC_replace (tree, tpa->trees, last,
+ VEC_index (tree, tpa->trees, x));
VARRAY_INT (tpa->first_partition, last)
= VARRAY_INT (tpa->first_partition, x);
tpa->partition_to_tree_map[tpa_first_partition (tpa, last)] = last;
/* Since this list is known to have more than one partition, update
the list owner entries. */
- VARRAY_TREE (tpa->trees, x) = swap_t;
+ VEC_replace (tree, tpa->trees, x, swap_t);
VARRAY_INT (tpa->first_partition, x) = swap_i;
for (y = tpa_first_partition (tpa, x);
y != NO_PARTITION;
{
ann->root_var_processed = 1;
VAR_ANN_ROOT_INDEX (ann) = rv->num_trees++;
- VARRAY_PUSH_TREE (rv->trees, t);
+ VEC_safe_push (tree, heap, rv->trees, t);
VARRAY_PUSH_INT (rv->first_partition, p);
}
rv->partition_to_tree_map[p] = VAR_ANN_ROOT_INDEX (ann);
/* Reset the out_of_ssa_tag flag on each variable for later use. */
for (x = 0; x < rv->num_trees; x++)
{
- t = VARRAY_TREE (rv->trees, x);
+ t = VEC_index (tree, rv->trees, x);
var_ann (t)->root_var_processed = 0;
}
/* Find the list for this type. */
for (y = 0; y < tv->num_trees; y++)
- if (t == VARRAY_TREE (tv->trees, y))
+ if (t == VEC_index (tree, tv->trees, y))
break;
if (y == tv->num_trees)
{
tv->num_trees++;
- VARRAY_PUSH_TREE (tv->trees, t);
+ VEC_safe_push (tree, heap, tv->trees, t);
VARRAY_PUSH_INT (tv->first_partition, p);
}
else
}
}
+DEF_VEC_I(int);
+DEF_VEC_ALLOC_I(int,heap);
/* Return a conflict graph for the information contained in LIVE_INFO. Only
conflicts between items in the same TPA list are added. If optional
bitmap live;
unsigned x, y, i;
basic_block bb;
- varray_type partition_link, tpa_to_clear, tpa_nodes;
+ int *partition_link, *tpa_nodes;
+ VEC(int,heap) *tpa_to_clear;
unsigned l;
ssa_op_iter iter;
bitmap_iterator bi;
if (tpa_num_trees (tpa) == 0)
return graph;
- live = BITMAP_XMALLOC ();
+ live = BITMAP_ALLOC (NULL);
- VARRAY_INT_INIT (partition_link, num_var_partitions (map) + 1, "part_link");
- VARRAY_INT_INIT (tpa_nodes, tpa_num_trees (tpa), "tpa nodes");
- VARRAY_INT_INIT (tpa_to_clear, 50, "tpa to clear");
+ partition_link = xcalloc (num_var_partitions (map) + 1, sizeof (int));
+ tpa_nodes = xcalloc (tpa_num_trees (tpa), sizeof (int));
+ tpa_to_clear = VEC_alloc (int, heap, 50);
FOR_EACH_BB (bb)
{
block_stmt_iterator bsi;
tree phi;
+ int idx;
/* Start with live on exit temporaries. */
bitmap_copy (live, live_on_exit (liveinfo, bb));
{
bool is_a_copy = false;
tree stmt = bsi_stmt (bsi);
- stmt_ann_t ann;
-
- get_stmt_operands (stmt);
- ann = stmt_ann (stmt);
/* A copy between 2 partitions does not introduce an interference
by itself. If they did, you would never be able to coalesce
i = tpa_find_tree (tpa, x);
if (i != (unsigned)TPA_NONE)
{
- int start = VARRAY_INT (tpa_nodes, i);
+ int start = tpa_nodes[i];
/* If start is 0, a new root reference list is being started.
Register it to be cleared. */
if (!start)
- VARRAY_PUSH_INT (tpa_to_clear, i);
+ VEC_safe_push (int, heap, tpa_to_clear, i);
/* Add interferences to other tpa members seen. */
- for (y = start; y != 0; y = VARRAY_INT (partition_link, y))
+ for (y = start; y != 0; y = partition_link[y])
conflict_graph_add (graph, x, y - 1);
- VARRAY_INT (tpa_nodes, i) = x + 1;
- VARRAY_INT (partition_link, x + 1) = start;
+ tpa_nodes[i] = x + 1;
+ partition_link[x + 1] = start;
}
}
/* Now clear the used tpa root references. */
- for (l = 0; l < VARRAY_ACTIVE_SIZE (tpa_to_clear); l++)
- VARRAY_INT (tpa_nodes, VARRAY_INT (tpa_to_clear, l)) = 0;
- VARRAY_POP_ALL (tpa_to_clear);
+ for (l = 0; VEC_iterate (int, tpa_to_clear, l, idx); l++)
+ tpa_nodes[idx] = 0;
+ VEC_truncate (int, tpa_to_clear, 0);
}
- BITMAP_XFREE (live);
+ free (tpa_nodes);
+ free (partition_link);
+ VEC_free (int, heap, tpa_to_clear);
+ BITMAP_FREE (live);
return graph;
}
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