/*
- * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
* @file
* @brief Combining congruent blocks
* @author Michael Beck
- * @version $Id$
*
- * This phase find congruent blocks. Works currently for
- * predecessors of the end block only.
+ * This phase find congruent blocks.
* Two block are congruent, if they contains only equal calculations.
*/
#include "config.h"
-#include "ircons.h"
+
#include "iroptimize.h"
+#include "ircons.h"
#include "irgmod.h"
#include "irgraph_t.h"
#include "irnode_t.h"
#include "trouts.h"
#include "irgwalk.h"
#include "set.h"
+#include "irpass.h"
#include "debug.h"
+#include "util.h"
-/* define this for gneral block shaping (buggy yet) */
-#undef GENERAL_SHAPE
+/* define this for general block shaping: congruent blocks
+ are found not only before the end block but anywhere in the graph */
+#define GENERAL_SHAPE
typedef struct partition_t partition_t;
typedef struct block_t block_t;
typedef struct opcode_key_t opcode_key_t;
typedef struct listmap_entry_t listmap_entry_t;
typedef struct environment_t environment_t;
+typedef struct pred_t pred_t;
/** An opcode map key. */
struct opcode_key_t {
- ir_opcode code; /**< The Firm opcode. */
+ unsigned code; /**< The Firm opcode. */
ir_mode *mode; /**< The mode of all nodes in the partition. */
int arity; /**< The arity of this opcode (needed for Phi etc. */
union {
- long proj; /**< For Proj nodes, its proj number */
- ir_entity *ent; /**< For Sel Nodes, its entity */
+ long proj; /**< For Proj nodes, its proj number */
+ ir_entity *ent; /**< For Sel nodes, its entity */
+ ir_tarval *tv; /**< For Const nodes, its tarval */
+ symconst_symbol sym; /**< For SymConst nodes, its symbol .*/
+ void *addr; /**< Alias all addresses. */
+ int intVal; /**< For Conv/Div nodes: strict/remainderless. */
} u;
};
node_t *cf_root; /**< The control flow root node of this block. */
pair_t *input_pairs; /**< The list of inputs to this block. */
phi_t *phis; /**< The list of Phis in this block. */
- block_t *all_next; /**< links all craeted blocks. */
+ block_t *all_next; /**< Links all created blocks. */
+ int meet_input; /**< Input number of this block in the meet-block. */
};
/** A node. */
struct obstack obst; /** obstack for temporary data */
};
-/** A node, input index pair. */
+/** A (node, input index) pair. */
struct pair_t {
pair_t *next; /**< Points to the next pair entry. */
ir_node *irn; /**< The IR-node. */
ir_node **ins; /**< A new in array once allocated. */
};
+/** Describes a predecessor input. */
+struct pred_t {
+ ir_node *pred; /**< The predecessor. */
+ int index; /**< Its input index. */
+};
+
/**
* An entry in the list_map.
*/
DEBUG_ONLY(static firm_dbg_module_t *dbg;)
/** Next partition number. */
-DEBUG_ONLY(static unsigned part_nr = 0);
+DEBUG_ONLY(static unsigned part_nr = 0;)
#ifdef DEBUG_libfirm
/**
* Dump partition to output.
*/
-static void dump_partition(const char *msg, const partition_t *part) {
- const block_t *block;
- int first = 1;
+static void dump_partition(const char *msg, const partition_t *part)
+{
+ int first = 1;
DB((dbg, LEVEL_2, " %s part%u (%u blocks) {\n ", msg, part->nr, part->n_blocks));
list_for_each_entry(block_t, block, &part->blocks, block_list) {
first = 0;
}
DB((dbg, LEVEL_2, "\n }\n"));
-} /* dump_partition */
+}
/**
* Dumps a list.
*/
-static void dump_list(const char *msg, const block_t *block) {
+static void dump_list(const char *msg, const block_t *block)
+{
const block_t *p;
int first = 1;
first = 0;
}
DB((dbg, LEVEL_3, "\n }\n"));
-} /* do_dump_list */
+}
#else
#define dump_partition(msg, part)
#define dump_list(msg, block)
/**
* Compare two pointer values of a listmap.
*/
-static int listmap_cmp_ptr(const void *elt, const void *key, size_t size) {
- const listmap_entry_t *e1 = elt;
- const listmap_entry_t *e2 = key;
+static int listmap_cmp_ptr(const void *elt, const void *key, size_t size)
+{
+ const listmap_entry_t *e1 = (const listmap_entry_t*)elt;
+ const listmap_entry_t *e2 = (const listmap_entry_t*)key;
(void) size;
return e1->id != e2->id;
-} /* listmap_cmp_ptr */
+}
/**
* Initializes a listmap.
*
* @param map the listmap
*/
-static void listmap_init(listmap_t *map) {
+static void listmap_init(listmap_t *map)
+{
map->map = new_set(listmap_cmp_ptr, 16);
map->values = NULL;
-} /* listmap_init */
+}
/**
* Terminates a listmap.
*
* @param map the listmap
*/
-static void listmap_term(listmap_t *map) {
+static void listmap_term(listmap_t *map)
+{
del_set(map->map);
-} /* listmap_term */
+}
/**
* Return the associated listmap entry for a given id.
*
* @return the associated listmap entry for the given id
*/
-static listmap_entry_t *listmap_find(listmap_t *map, void *id) {
+static listmap_entry_t *listmap_find(listmap_t *map, void *id)
+{
listmap_entry_t key, *entry;
key.id = id;
key.list = NULL;
key.next = NULL;
- entry = set_insert(map->map, &key, sizeof(key), HASH_PTR(id));
+ entry = set_insert(listmap_entry_t, map->map, &key, sizeof(key), hash_ptr(id));
if (entry->list == NULL) {
/* a new entry, put into the list */
map->values = entry;
}
return entry;
-} /* listmap_find */
+}
/**
* Calculate the hash value for an opcode map entry.
*
* @return a hash value for the given opcode map entry
*/
-static unsigned opcode_hash(const opcode_key_t *entry) {
- return (entry->mode - (ir_mode *)0) * 9 + entry->code + entry->u.proj * 3 + HASH_PTR(entry->u.ent) + entry->arity;
-} /* opcode_hash */
+static unsigned opcode_hash(const opcode_key_t *entry)
+{
+ /* assume long >= int */
+ return (unsigned)(PTR_TO_INT(entry->mode) * 9 + entry->code + entry->u.proj * 3 + hash_ptr(entry->u.addr) + entry->arity);
+}
/**
* Compare two entries in the opcode map.
*/
-static int cmp_opcode(const void *elt, const void *key, size_t size) {
- const opcode_key_t *o1 = elt;
- const opcode_key_t *o2 = key;
+static int cmp_opcode(const void *elt, const void *key, size_t size)
+{
+ const opcode_key_t *o1 = (opcode_key_t*)elt;
+ const opcode_key_t *o2 = (opcode_key_t*)key;
(void) size;
return o1->code != o2->code || o1->mode != o2->mode ||
o1->arity != o2->arity ||
- o1->u.proj != o2->u.proj || o1->u.ent != o2->u.ent;
-} /* cmp_opcode */
+ o1->u.proj != o2->u.proj || o1->u.addr != o2->u.addr;
+}
/**
* Creates a new empty partition and put in on the
* partitions list.
*
- * @param meet_block the control flow meet block of thi partition
+ * @param meet_block the control flow meet block of this partition
* @param env the environment
*/
-static partition_t *create_partition(ir_node *meet_block, environment_t *env) {
- partition_t *part = obstack_alloc(&env->obst, sizeof(*part));
+static partition_t *create_partition(ir_node *meet_block, environment_t *env)
+{
+ partition_t *part = OALLOC(&env->obst, partition_t);
INIT_LIST_HEAD(&part->blocks);
part->meet_block = meet_block;
part->n_blocks = 0;
- DEBUG_ONLY(part->nr = part_nr++);
+ DEBUG_ONLY(part->nr = part_nr++;)
list_add_tail(&part->part_list, &env->partitions);
return part;
-} /* create_partition */
+}
/**
* Allocate a new block in the given partition.
*
* @param block the IR-node
+ * @param meet_input Input number of this block in the meet-block
* @param partition the partition to add to
* @param env the environment
*/
-static block_t *create_block(ir_node *block, partition_t *partition, environment_t *env) {
- block_t *bl = obstack_alloc(&env->obst, sizeof(*bl));
+static block_t *create_block(ir_node *block, int meet_input, partition_t *partition, environment_t *env)
+{
+ block_t *bl = OALLOC(&env->obst, block_t);
set_irn_link(block, bl);
bl->cf_root = NULL;
bl->input_pairs = NULL;
bl->phis = NULL;
+ bl->meet_input = meet_input;
/* put it into the list of partition blocks */
list_add_tail(&bl->block_list, &partition->blocks);
env->all_blocks = bl;
return bl;
-} /* create_block */
+}
/**
* Allocate a new node and add it to a blocks wait queue.
* @param block the block to add to
* @param env the environment
*/
-static node_t *create_node(ir_node *irn, block_t *block, environment_t *env) {
- node_t *node = obstack_alloc(&env->obst, sizeof(*node));
+static node_t *create_node(ir_node *irn, block_t *block, environment_t *env)
+{
+ node_t *node = OALLOC(&env->obst, node_t);
node->node = irn;
node->is_input = 0;
list_add_tail(&node->node_list, &block->nodes);
return node;
-} /* create_node */
+}
/**
* Add an input pair to a block.
* @param idx the index of the block input in node's predecessors
* @param env the environment
*/
-static void add_pair(block_t *block, ir_node *irn, int idx, environment_t *env) {
- pair_t *pair = obstack_alloc(&env->obst, sizeof(*pair));
+static void add_pair(block_t *block, ir_node *irn, int idx, environment_t *env)
+{
+ pair_t *pair = OALLOC(&env->obst, pair_t);
pair->next = block->input_pairs;
pair->irn = irn;
pair->ins = NULL;
block->input_pairs = pair;
-} /* add_pair */
+}
/**
* Add a Phi to a block.
* @param phi the Phi node
* @param env the environment
*/
-static void add_phi(block_t *block, ir_node *phi, environment_t *env) {
- phi_t *node = obstack_alloc(&env->obst, sizeof(*node));
+static void add_phi(block_t *block, ir_node *phi, environment_t *env)
+{
+ phi_t *node = OALLOC(&env->obst, phi_t);
node->next = block->phis;
node->phi = phi;
node->ins = NULL;
block->phis = node;
-} /** add_phi */
+}
/**
* Creates an opcode from a node.
*/
-static opcode_key_t *opcode(const node_t *node, environment_t *env) {
+static opcode_key_t *opcode(const node_t *node, environment_t *env)
+{
opcode_key_t key, *entry;
ir_node *irn = node->node;
}
key.mode = get_irn_mode(node->node);
key.u.proj = 0;
- key.u.ent = NULL;
+ key.u.addr = NULL;
switch (key.code) {
case iro_Proj:
case iro_Sel:
key.u.ent = get_Sel_entity(irn);
break;
+ case iro_SymConst:
+ key.u.sym = get_SymConst_symbol(irn);
+ break;
+ case iro_Const:
+ key.u.tv = get_Const_tarval(irn);
+ break;
+ case iro_Load:
+ key.mode = get_Load_mode(irn);
+ break;
+ case iro_Div:
+ key.u.intVal = get_Div_no_remainder(irn);
+ break;
+ case iro_Builtin:
+ key.u.intVal = get_Builtin_kind(irn);
+ break;
default:
break;
}
- entry = set_insert(env->opcode2id_map, &key, sizeof(key), opcode_hash(&key));
+ entry = set_insert(opcode_key_t, env->opcode2id_map, &key, sizeof(key), opcode_hash(&key));
return entry;
-} /* opcode */
+}
/**
* Split a partition by a local list.
*
* @return a new partition containing the nodes of g
*/
-static partition_t *split(partition_t *Z, block_t *g, environment_t *env) {
+static partition_t *split(partition_t *Z, block_t *g, environment_t *env)
+{
partition_t *Z_prime;
block_t *block;
unsigned n = 0;
dump_partition("Now ", Z);
dump_partition("Created new ", Z_prime);
return Z_prime;
-} /* split */
+}
+
+/**
+ * Return non-zero if pred should be tread as a input node.
+ */
+static int is_input_node(ir_node *pred, ir_node *irn, int index)
+{
+ /* for now, do NOT turn direct calls into indirect one */
+ if (index != 1)
+ return 1;
+ if (! is_SymConst_addr_ent(pred))
+ return 1;
+ if (! is_Call(irn))
+ return 1;
+ return 0;
+}
/**
* Propagate nodes on all wait queues of the given partition.
*
* @param part the partition
- * @param env the environment
+ * @param env the environment
*/
-void propagate_blocks(partition_t *part, environment_t *env) {
+static void propagate_blocks(partition_t *part, environment_t *env)
+{
block_t *ready_blocks = NULL;
unsigned n_ready = 0;
- block_t *bl, *next;
listmap_t map;
listmap_entry_t *iter;
DB((dbg, LEVEL_2, " Propagate blocks on part%u\n", part->nr));
- /* Let map be an empty mapping from the range of Opcodes to (local) list of Nodes. */
+ /* Let map be an empty mapping from the range of Opcodes to (local) list of blocks. */
listmap_init(&map);
list_for_each_entry_safe(block_t, bl, next, &part->blocks, block_list) {
opcode_key_t *id;
for (i = get_irn_arity(irn) - 1; i >= 0; --i) {
ir_node *pred = get_irn_n(irn, i);
ir_node *block = get_nodes_block(skip_Proj(pred));
- node_t *p_node;
if (block != bl->block) {
- p_node = create_node(pred, bl, env);
- /* do not threat Constants like live-ins */
- if (! is_irn_constlike(pred)) {
+ node_t *p_node = create_node(pred, bl, env);
+ if (is_input_node(pred, irn, i)) {
+ /* is a block live input */
p_node->is_input = 1;
if (! is_Phi(irn))
add_pair(bl, irn, i, env);
+ } else if (is_Phi(pred)) {
+ /* update the Phi list */
+ add_phi(bl, pred, env);
}
} else if (! irn_visited_else_mark(pred)) {
/* not yet visited, ok */
- p_node = create_node(pred, bl, env);
+ create_node(pred, bl, env);
if (is_Phi(pred)) {
/* update the Phi list */
DB((dbg, LEVEL_3, " propagate Input %+F\n", node->node));
}
- /* Add bl to map[opcode(bl)]. */
+ /* Add bl to map[opcode(n)]. */
id = opcode(node, env);
entry = listmap_find(&map, id);
bl->next = entry->list;
split(part, S, env);
}
listmap_term(&map);
-} /* propagate_blocks */
+}
/**
* Propagate nodes on all wait queues.
*
* @param env the environment
*/
-void propagate(environment_t *env) {
- partition_t *part, *next;
-
+static void propagate(environment_t *env)
+{
list_for_each_entry_safe(partition_t, part, next, &env->partitions, part_list) {
if (part->n_blocks < 2) {
/* zero or one block left, kill this partition */
} else
propagate_blocks(part, env);
}
-} /* propagate */
+}
+
+/**
+ * Map a block to the phi[block->input] live-trough.
+ */
+static void *live_throughs(const block_t *bl, const ir_node *phi)
+{
+ ir_node *input = get_Phi_pred(phi, bl->meet_input);
+
+ /* If this input is inside our block, this
+ is a live-out and not a live trough.
+ Live-outs are tested inside propagate, so map all of
+ them to the "general" value NULL */
+ if (get_nodes_block(input) == bl->block)
+ return NULL;
+ return input;
+}
+
+/**
+ * Split partition by live-outs and live-troughs.
+ *
+ * @param part the partition
+ * @param env the environment
+ */
+static void propagate_blocks_live_troughs(partition_t *part, environment_t *env)
+{
+ const ir_node *meet_block = part->meet_block;
+ listmap_t map;
+ listmap_entry_t *iter;
+ const ir_node *phi;
+
+ DB((dbg, LEVEL_2, " Propagate live-troughs on part%u\n", part->nr));
+
+ for (phi = get_Block_phis(meet_block); phi != NULL; phi = get_Phi_next(phi)) {
+ /* propagate on all Phis of the meet-block */
+
+ if (part->n_blocks < 2) {
+ /* zero or one block left, kill this partition */
+ list_del(&part->part_list);
+ DB((dbg, LEVEL_2, " Partition %u contains less than 2 blocks, killed\n", part->nr));
+ return;
+ }
+
+ /* Let map be an empty mapping from the range of live-troughs to (local) list of blocks. */
+ listmap_init(&map);
+ list_for_each_entry_safe(block_t, bl, next, &part->blocks, block_list) {
+ opcode_key_t *id;
+ listmap_entry_t *entry;
+
+ /* Add bl to map[live_trough(bl)]. */
+ id = (opcode_key_t*)live_throughs(bl, phi);
+ entry = listmap_find(&map, id);
+ bl->next = entry->list;
+ entry->list = bl;
+ }
+
+ /* for all sets S except one in the range of map do */
+ for (iter = map.values; iter != NULL; iter = iter->next) {
+ block_t *S;
+
+ if (iter->next == NULL) {
+ /* this is the last entry, ignore */
+ break;
+ }
+ S = iter->list;
+
+ /* Add SPLIT( X, S ) to P. */
+ split(part, S, env);
+ }
+ listmap_term(&map);
+ }
+}
+
+/**
+ * Propagate live-troughs on all partitions on the partition list.
+ *
+ * @param env the environment
+ */
+static void propagate_live_troughs(environment_t *env)
+{
+ list_for_each_entry_safe(partition_t, part, next, &env->partitions, part_list) {
+ propagate_blocks_live_troughs(part, env);
+ }
+}
/**
* Apply analysis results by replacing all blocks of a partition
*
* @param part the partition to process
*/
-static void apply(ir_graph *irg, partition_t *part) {
+static void apply(ir_graph *irg, partition_t *part)
+{
block_t *repr = list_entry(part->blocks.next, block_t, block_list);
- block_t *bl;
ir_node *block, *end, *meet_block, *p, *next;
ir_node **ins, **phi_ins;
phi_t *repr_phi, *phi;
pair_t *repr_pair, *pair;
- int i, j, k, n, block_nr, n_phis;
+ int i, j, k, n, n_phis;
list_del(&repr->block_list);
/* collect new in arrays */
end = get_irg_end(irg);
- block_nr = 0;
list_for_each_entry(block_t, bl, &part->blocks, block_list) {
block = bl->block;
- ++block_nr;
DB((dbg, LEVEL_1, "%+F, ", block));
if (is_op_forking(cfop)) {
/* a critical edge */
ir_node *block = new_r_Block(irg, 1, &ins[i]);
- ir_node *jmp = new_r_Jmp(irg, block);
+ ir_node *jmp = new_r_Jmp(block);
ins[i] = jmp;
}
}
for (repr_pair = repr->input_pairs; repr_pair != NULL; repr_pair = repr_pair->next) {
ir_node *input = get_irn_n(repr_pair->irn, repr_pair->index);
ir_mode *mode = get_irn_mode(input);
- ir_node *phi = new_r_Phi(current_ir_graph, block, n, repr_pair->ins, mode);
+ ir_node *phi = new_r_Phi(block, n, repr_pair->ins, mode);
set_irn_n(repr_pair->irn, repr_pair->index, phi);
DEL_ARR_F(repr_pair->ins);
/* fix inputs of the meet block */
set_irn_in(meet_block, j, ins);
DEL_ARR_F(ins);
-} /* apply */
+}
/**
* Create a partition for a the end block.
* @param end_block the end block
* @param env the environment
*/
-static void partition_for_end_block(ir_node *end_block, environment_t *env) {
+static void partition_for_end_block(ir_node *end_block, environment_t *env)
+{
partition_t *part = create_partition(end_block, env);
ir_node *end;
int i;
mark_irn_visited(pred);
block = get_nodes_block(pred);
- bl = create_block(block, part, env);
+ bl = create_block(block, i, part, env);
node = create_node(pred, bl, env);
bl->cf_root = node;
}
/* collect all no-return blocks */
- end = get_irg_end(current_ir_graph);
+ end = get_irg_end(get_irn_irg(end_block));
for (i = get_End_n_keepalives(end) - 1; i >= 0; --i) {
ir_node *ka = get_End_keepalive(end, i);
ir_node *block;
/* found one */
block = get_nodes_block(ka);
- bl = create_block(block, part, env);
+ bl = create_block(block, -1, part, env);
node = create_node(ka, bl, env);
bl->cf_root = node;
}
dump_partition("Created", part);
-} /* partition_for_end_block */
+}
#ifdef GENERAL_SHAPE
/**
* @param n_preds number of elements in preds
* @param env the environment
*/
-static void partition_for_block(ir_node *block, ir_node *preds[], int n_preds, environment_t *env) {
+static void partition_for_block(ir_node *block, pred_t preds[], int n_preds, environment_t *env)
+{
partition_t *part = create_partition(block, env);
int i;
for (i = n_preds - 1; i >= 0; --i) {
- ir_node *pred = preds[i];
+ ir_node *pred = preds[i].pred;
ir_node *block;
block_t *bl;
node_t *node;
mark_irn_visited(pred);
block = get_nodes_block(pred);
- bl = create_block(block, part, env);
+ bl = create_block(block, preds[i].index, part, env);
node = create_node(pred, bl, env);
bl->cf_root = node;
}
dump_partition("Created", part);
-} /* partition_for_block */
+}
/**
* Walker: clear the links of all block phi lists and normal
* links.
*/
-static void clear_phi_links(ir_node *irn, void *env) {
+static void clear_phi_links(ir_node *irn, void *env)
+{
(void) env;
if (is_Block(irn)) {
set_Block_phis(irn, NULL);
set_irn_link(irn, NULL);
}
-} /* clear_phi_links */
+}
/**
- * Walker, detect live-out only nodes.
+ * Walker, detect live-out nodes.
*/
-static void find_liveouts(ir_node *irn, void *ctx) {
- environment_t *env = ctx;
+static void find_liveouts(ir_node *irn, void *ctx)
+{
+ environment_t *env = (environment_t*)ctx;
ir_node **live_outs = env->live_outs;
ir_node *this_block;
int i;
ir_node *pred = get_irn_n(irn, i);
int idx = get_irn_idx(pred);
- if (live_outs[idx] == pred) {
- /* referenced by other nodes inside this block */
+ if (live_outs[idx] != NULL) {
+ /* already marked as live-out */
return;
}
pred_block = get_nodes_block(pred);
- if (this_block != pred_block) {
+ /* Phi nodes always refer to live-outs */
+ if (is_Phi(irn) || this_block != pred_block) {
/* pred is a live-out */
live_outs[idx] = pred_block;
- } else {
- /* this node is referenced from inside this block */
- live_outs[idx] = pred;
}
}
}
/**
- * Check if the current block is the meet block of a its predecessors.
+ * Check if the current block is the meet block of its predecessors.
*/
-static void check_for_cf_meet(ir_node *block, void *ctx) {
- environment_t *env = ctx;
+static void check_for_cf_meet(ir_node *block, void *ctx)
+{
+ environment_t *env = (environment_t*)ctx;
int i, k, n;
- ir_node **preds;
+ pred_t *preds;
- if (block == get_irg_end_block(current_ir_graph)) {
+ if (block == get_irg_end_block(get_irn_irg(block))) {
/* always create a partition for the end block */
partition_for_end_block(block, env);
return;
/* Must have at least two predecessors */
return;
}
- NEW_ARR_A(ir_node *, preds, n);
+ NEW_ARR_A(pred_t, preds, n);
k = 0;
for (i = n - 1; i >= 0; --i) {
ir_node *pred = get_Block_cfgpred(block, i);
/* pred must be a direct jump to us */
- if (! is_Jmp(pred) && ! is_Raise(pred))
+ if (! is_Jmp(pred) && ! is_Raise(pred) && !is_Bad(pred))
continue;
- preds[k++] = pred;
+
+ preds[k].pred = pred;
+ preds[k].index = i;
+ ++k;
}
if (k > 1)
partition_for_block(block, preds, k, env);
-} /* check_for_cf_meet */
+}
/**
* Compare two nodes for root ordering.
*/
-static int cmp_nodes(const void *a, const void *b) {
- ir_node *const *pa = a;
- ir_node *const *pb = b;
+static int cmp_nodes(const void *a, const void *b)
+{
+ const ir_node *const *pa = (const ir_node*const*)a;
+ const ir_node *const *pb = (const ir_node*const*)b;
const ir_node *irn_a = *pa;
const ir_node *irn_b = *pb;
- ir_opcode code_a = get_irn_opcode(irn_a);
- ir_opcode code_b = get_irn_opcode(irn_b);
+ unsigned code_a = get_irn_opcode(irn_a);
+ unsigned code_b = get_irn_opcode(irn_b);
ir_mode *mode_a, *mode_b;
unsigned idx_a, idx_b;
idx_b = get_irn_idx(irn_b);
return (idx_a > idx_b) - (idx_a < idx_b);
-} /* cmp_nodes */
+}
/**
* Add the roots to all blocks.
*/
-static void add_roots(ir_graph *irg, environment_t *env) {
+static void add_roots(ir_graph *irg, environment_t *env)
+{
unsigned idx, n = get_irg_last_idx(irg);
ir_node **live_outs = env->live_outs;
block_t *bl;
}
/*
* Now sort the roots to normalize them as good as possible.
- * Else, we will split identical blocks if we start which different roots
+ * Else, we will split identical blocks if we start which different roots.
*/
for (bl = env->all_blocks; bl != NULL; bl = bl->all_next) {
- int i, n = ARR_LEN(bl->roots);
+ size_t i, n = ARR_LEN(bl->roots);
#if 1
/* TODO: is this really needed? The roots are already in
DEL_ARR_F(bl->roots);
bl->roots = NULL;
}
-} /* add_roots */
+}
#endif /* GENERAL_SHAPE */
/* Combines congruent end blocks into one. */
-int shape_blocks(ir_graph *irg) {
- ir_graph *rem;
+void shape_blocks(ir_graph *irg)
+{
environment_t env;
- partition_t *part;
+ block_t *bl;
int res, n;
- rem = current_ir_graph;
- current_ir_graph = irg;
-
/* register a debug mask */
FIRM_DBG_REGISTER(dbg, "firm.opt.blocks");
- DEBUG_ONLY(part_nr = 0);
+ DEBUG_ONLY(part_nr = 0;)
DB((dbg, LEVEL_1, "Shaping blocks for %+F\n", irg));
/* works better, when returns are placed at the end of the blocks */
env.opcode2id_map = new_set(cmp_opcode, iro_Last * 4);
n = get_irg_last_idx(irg);
- env.live_outs = NEW_ARR_F(ir_node *, n);
- memset(env.live_outs, 0, sizeof(*env.live_outs) * n);
+ env.live_outs = NEW_ARR_FZ(ir_node*, n);
env.all_blocks = NULL;
partition_for_end_block(get_irg_end_block(irg), &env);
#endif
+ propagate_live_troughs(&env);
while (! list_empty(&env.partitions))
propagate(&env);
res = !list_empty(&env.ready);
+ //if (res) dump_ir_block_graph(irg, "-before");
+
list_for_each_entry(partition_t, part, &env.ready, part_list) {
dump_partition("Ready Partition", part);
if (res) {
/* control flow changed */
- set_irg_outs_inconsistent(irg);
- set_irg_extblk_inconsistent(irg);
- set_irg_doms_inconsistent(irg);
- /* Hmm, only the root loop is inconsistent */
- set_irg_loopinfo_inconsistent(irg);
-
- /* Calls might be removed. */
- set_trouts_inconsistent();
+ clear_irg_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_DOMINANCE);
+ }
+
+ for (bl = env.all_blocks; bl != NULL; bl = bl->all_next) {
+ DEL_ARR_F(bl->roots);
}
DEL_ARR_F(env.live_outs);
del_set(env.opcode2id_map);
obstack_free(&env.obst, NULL);
- current_ir_graph = rem;
+}
- return res;
-} /* shape_blocks */
+ir_graph_pass_t *shape_blocks_pass(const char *name)
+{
+ return def_graph_pass(name ? name : "shape_blocks", shape_blocks);
+}
projects / libfirm / blobdiff