/*
- * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved.
- *
* This file is part of libFirm.
- *
- * This file may be distributed and/or modified under the terms of the
- * GNU General Public License version 2 as published by the Free Software
- * Foundation and appearing in the file LICENSE.GPL included in the
- * packaging of this file.
- *
- * Licensees holding valid libFirm Professional Edition licenses may use
- * this file in accordance with the libFirm Commercial License.
- * Agreement provided with the Software.
- *
- * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
- * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE.
+ * Copyright (C) 2012 University of Karlsruhe.
*/
/**
* @file
* @brief Cliff Click's Combined Analysis/Optimization
* @author Michael Beck
- * @version $Id$
*
* This is a slightly enhanced version of Cliff Clicks combo algorithm
* - support for commutative nodes is added, Add(a,b) and Add(b,a) ARE congruent
* - supports all Firm direct (by a data edge) identities except Mux
* (Mux can be a 2-input or 1-input identity, only 2-input is implemented yet)
* - supports Confirm nodes (handle them like Copies but do NOT remove them)
- * - let Cmp nodes calculate Top like all othe data nodes: this would let
+ * - let Cmp nodes calculate Top like all other data nodes: this would let
* Mux nodes to calculate Unknown instead of taking the true result
- * - let Cond(Top) always select FALSE/default: This is tricky. Nodes are only reavaluated
+ * - let Cond(Top) always select FALSE/default: This is tricky. Nodes are only reevaluated
* IFF the predecessor changed its type. Because nodes are initialized with Top
* this never happens, let all Proj(Cond) be unreachable.
* We avoid this condition by the same way we work around Phi: whenever a Block
#include "irpass.h"
#include "tv_t.h"
#include "irtools.h"
+#include "firmstat_t.h"
#include "irprintf.h"
#include "irdump.h"
node_t *race_next; /**< Next node on race list. */
lattice_elem_t type; /**< The associated lattice element "type". */
int max_user_input; /**< Maximum input number of Def-Use edges. */
- int next_edge; /**< Index of the next Def-Use edge to use. */
- int n_followers; /**< Number of Follower in the outs set. */
+ unsigned next_edge; /**< Index of the next Def-Use edge to use. */
+ unsigned n_followers; /**< Number of Follower in the outs set. */
unsigned on_touched:1; /**< Set, if this node is on the partition.touched set. */
unsigned on_cprop:1; /**< Set, if this node is on the partition.cprop list. */
unsigned on_fallen:1; /**< Set, if this node is on the fallen list. */
DEBUG_ONLY(static const char *what_reason;)
/** Next partition number. */
-DEBUG_ONLY(static unsigned part_nr = 0);
+DEBUG_ONLY(static unsigned part_nr = 0;)
/** The tarval returned by Unknown nodes: set to either tarval_bad OR tarval_top. */
static ir_tarval *tarval_UNKNOWN;
return a->op->ops.node_cmp_attr(a, b);
return 0;
-} /* cmp_irn_opcode */
+}
#ifdef CHECK_PARTITIONS
/**
*/
static void check_partition(const partition_t *T)
{
- node_t *node;
unsigned n = 0;
list_for_each_entry(node_t, node, &T->Leader, node_list) {
assert(node->flagged == 0);
assert(node->part == T);
}
-} /* check_partition */
+}
/**
* check that all leader nodes in the partition have the same opcode.
*/
static void check_opcode(const partition_t *Z)
{
- node_t *node;
const ir_node *repr = NULL;
list_for_each_entry(node_t, node, &Z->Leader, node_list) {
assert(cmp_irn_opcode(repr, irn) == 0);
}
}
-} /* check_opcode */
+}
static void check_all_partitions(environment_t *env)
{
#ifdef DEBUG_libfirm
partition_t *P;
- node_t *node;
for (P = env->dbg_list; P != NULL; P = P->dbg_next) {
check_partition(P);
(void) ofs;
(void) Z;
#endif
-} /* ido_check_list */
+}
/**
* Check a local list.
static void check_list(const node_t *list, const partition_t *Z)
{
do_check_list(list, offsetof(node_t, next), Z);
-} /* check_list */
+}
#else
#define check_partition(T)
*/
static void dump_partition(const char *msg, const partition_t *part)
{
- const node_t *node;
int first = 1;
lattice_elem_t type = get_partition_type(part);
}
}
DB((dbg, LEVEL_2, "\n}\n"));
-} /* dump_partition */
+}
/**
* Dumps a list.
DB((dbg, LEVEL_3, "\n}\n"));
#undef GET_LINK
-} /* do_dump_list */
+}
/**
* Dumps a race list.
static void dump_race_list(const char *msg, const node_t *list)
{
do_dump_list(msg, list, offsetof(node_t, race_next));
-} /* dump_race_list */
+}
/**
* Dumps a local list.
static void dump_list(const char *msg, const node_t *list)
{
do_dump_list(msg, list, offsetof(node_t, next));
-} /* dump_list */
+}
/**
* Dump all partitions.
DB((dbg, LEVEL_2, "All partitions\n===============\n"));
for (P = env->dbg_list; P != NULL; P = P->dbg_next)
dump_partition("", P);
-} /* dump_all_partitions */
+}
/**
* Sump a split list.
static void dump_split_list(const partition_t *list)
{
const partition_t *p;
+ char split = ' ';
DB((dbg, LEVEL_2, "Split by %s produced = {\n", what_reason));
- for (p = list; p != NULL; p = p->split_next)
- DB((dbg, LEVEL_2, "part%u, ", p->nr));
+ for (p = list; p != NULL; p = p->split_next) {
+ DB((dbg, LEVEL_2, "%c part%u", split, p->nr));
+ split = ',';
+ }
DB((dbg, LEVEL_2, "\n}\n"));
-} /* dump_split_list */
+}
/**
* Dump partition and type for a node.
*/
-static int dump_partition_hook(FILE *F, ir_node *n, ir_node *local)
+static int dump_partition_hook(FILE *F, const ir_node *n, const ir_node *local)
{
- ir_node *irn = local != NULL ? local : n;
+ const ir_node *irn = local != NULL ? local : n;
node_t *node = get_irn_node(irn);
ir_fprintf(F, "info2 : \"partition %u type %+F\"\n", node->part->nr, node->type);
return 1;
-} /* dump_partition_hook */
+}
#else
#define dump_partition(msg, part)
/* bottom reached */
return;
}
- panic("combo: wrong translation from %+F to %+F on node %+F", old_type, node->type, node->node);
-} /* verify_type */
+ panic("wrong translation from %+F to %+F on node %+F", old_type, node->type, node->node);
+}
#else
#define verify_type(old_type, node)
(void) size;
return e1->id != e2->id;
-} /* listmap_cmp_ptr */
+}
/**
* Initializes a listmap.
{
map->map = new_set(listmap_cmp_ptr, 16);
map->values = NULL;
-} /* listmap_init */
+}
/**
* Terminates a listmap.
static void listmap_term(listmap_t *map)
{
del_set(map->map);
-} /* listmap_term */
+}
/**
* Return the associated listmap entry for a given id.
key.id = id;
key.list = NULL;
key.next = NULL;
- entry = (listmap_entry_t*)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.
/* we cannot use the ir ops hash function here, because it hashes the
* predecessors. */
const ir_node *n = entry->irn;
- ir_opcode code = get_irn_opcode(n);
+ ir_opcode code = (ir_opcode)get_irn_opcode(n);
ir_mode *mode = get_irn_mode(n);
unsigned hash = (unsigned)(PTR_TO_INT(mode) * 9 + code) + get_irn_arity(n);
if (code == iro_Const)
- hash ^= (unsigned)HASH_PTR(get_Const_tarval(n));
+ hash ^= (unsigned)hash_ptr(get_Const_tarval(n));
else if (code == iro_Proj)
hash += (unsigned)get_Proj_proj(n);
return hash;
-} /* opcode_hash */
+}
/**
* Compare two entries in the opcode map.
(void) size;
return cmp_irn_opcode(o1->irn, o2->irn);
-} /* cmp_opcode */
+}
/**
* Compare two Def-Use edges for input position.
/* no overrun, because range is [-1, MAXINT] */
return ea->pos - eb->pos;
-} /* cmp_def_use_edge */
+}
/**
* We need the Def-Use edges sorted.
static void sort_irn_outs(node_t *node)
{
ir_node *irn = node->node;
- int n_outs = get_irn_n_outs(irn);
-
- if (n_outs > 1) {
- qsort(&irn->out[1], n_outs, sizeof(irn->out[0]), cmp_def_use_edge);
- }
- node->max_user_input = irn->out[n_outs].pos;
-} /* sort_irn_outs */
+ unsigned n_outs = get_irn_n_outs(irn);
+ qsort(irn->o.out->edges, n_outs, sizeof(irn->o.out->edges[0]),
+ cmp_def_use_edge);
+ node->max_user_input = n_outs > 0 ? irn->o.out->edges[n_outs-1].pos : -1;
+}
/**
* Return the type of a node.
static inline lattice_elem_t get_node_type(const ir_node *irn)
{
return get_irn_node(irn)->type;
-} /* get_node_type */
+}
/**
* Return the tarval of a node.
if (is_tarval(type.tv))
return type.tv;
return tarval_bottom;
-} /* get_node_type */
+}
/**
* Add a partition to the worklist.
X->wl_next = env->worklist;
X->on_worklist = 1;
env->worklist = X;
-} /* add_to_worklist */
+}
/**
* Create a new empty partition.
#endif
return part;
-} /* new_partition */
+}
/**
* Get the first node from a partition.
static inline node_t *get_first_node(const partition_t *X)
{
return list_entry(X->Leader.next, node_t, node_list);
-} /* get_first_node */
+}
/**
* Return the type of a partition (assuming partition is non-empty and
{
const node_t *first = get_first_node(X);
return first->type;
-} /* get_partition_type */
+}
/**
* Creates a partition node for the given IR-node and place it
++part->n_leader;
return node;
-} /* create_partition_node */
+}
/**
* Pre-Walker, initialize all Nodes' type to U or top and place
if (is_Block(irn)) {
set_Block_phis(irn, NULL);
}
-} /* create_initial_partitions */
+}
/**
* Post-Walker, collect all Block-Phi lists, set Cond.
ir_node *block = get_nodes_block(irn);
add_Block_phi(block, irn);
}
-} /* init_block_phis */
+}
/**
* Add a node to the entry.partition.touched set and
check_list(part->touched, part);
}
-} /* add_to_touched */
+}
/**
* Place a node on the cprop list.
if (y->on_cprop == 0) {
partition_t *Y = y->part;
ir_node *irn = y->node;
+ ir_node *skipped = skip_Proj(irn);
/* place Conds and all its Projs on the cprop_X list */
- if (is_Cond(skip_Proj(irn)))
+ if (is_Cond(skipped) || is_Switch(skipped))
list_add_tail(&y->cprop_list, &Y->cprop_X);
else
list_add_tail(&y->cprop_list, &Y->cprop);
if (get_irn_mode(irn) == mode_T) {
/* mode_T nodes always produce tarval_bottom, so we must explicitly
* add its Projs to get constant evaluation to work */
- int i;
-
- for (i = get_irn_n_outs(irn) - 1; i >= 0; --i) {
+ for (unsigned i = get_irn_n_outs(irn); i-- > 0; ) {
node_t *proj = get_irn_node(get_irn_out(irn, i));
add_to_cprop(proj, env);
add_to_cprop(p, env);
}
}
-} /* add_to_cprop */
+}
/**
* Update the worklist: If Z is on worklist then add Z' to worklist.
} else {
add_to_worklist(Z, env);
}
-} /* update_worklist */
+}
/**
* Make all inputs to x no longer be F.def_use edges.
*/
static void move_edges_to_leader(node_t *x)
{
- ir_node *irn = x->node;
- int i, j, k;
-
- for (i = get_irn_arity(irn) - 1; i >= 0; --i) {
+ ir_node *irn = x->node;
+ for (int i = get_irn_arity(irn) - 1; i >= 0; --i) {
node_t *pred = get_irn_node(get_irn_n(irn, i));
- ir_node *p;
- int n;
-
- p = pred->node;
- n = get_irn_n_outs(p);
- for (j = 1; j <= pred->n_followers; ++j) {
- if (p->out[j].pos == i && p->out[j].use == irn) {
+ ir_node *p = pred->node;
+ unsigned n = get_irn_n_outs(p);
+ for (unsigned j = 0; j < pred->n_followers; ++j) {
+ ir_def_use_edge edge = p->o.out->edges[j];
+ if (edge.pos == i && edge.use == irn) {
/* found a follower edge to x, move it to the Leader */
- ir_def_use_edge edge = p->out[j];
-
/* remove this edge from the Follower set */
- p->out[j] = p->out[pred->n_followers];
--pred->n_followers;
+ p->o.out->edges[j] = p->o.out->edges[pred->n_followers];
/* sort it into the leader set */
- for (k = pred->n_followers + 2; k <= n; ++k) {
- if (p->out[k].pos >= edge.pos)
+ unsigned k;
+ for (k = pred->n_followers+1; k < n; ++k) {
+ if (p->o.out->edges[k].pos >= edge.pos)
break;
- p->out[k - 1] = p->out[k];
+ p->o.out->edges[k-1] = p->o.out->edges[k];
}
/* place the new edge here */
- p->out[k - 1] = edge;
+ p->o.out->edges[k-1] = edge;
/* edge found and moved */
break;
}
}
}
-} /* move_edges_to_leader */
+}
/**
* Split a partition that has NO followers by a local list.
/* for now, copy the type info tag, it will be adjusted in split_by(). */
Z_prime->type_is_T_or_C = Z->type_is_T_or_C;
- update_worklist(Z, Z_prime, env);
-
dump_partition("Now ", Z);
dump_partition("Created new ", Z_prime);
+
+ update_worklist(Z, Z_prime, env);
+
return Z_prime;
-} /* split_no_followers */
+}
/**
* Make the Follower -> Leader transition for a node.
list_del(&n->node_list);
list_add_tail(&n->node_list, &n->part->Leader);
++n->part->n_leader;
-} /* follower_to_leader */
+}
/**
* The environment for one race step.
node_t *initial; /**< The initial node list. */
node_t *unwalked; /**< The unwalked node list. */
node_t *walked; /**< The walked node list. */
- int index; /**< Next index of Follower use_def edge. */
+ unsigned index; /**< Next index of Follower use_def edge. */
unsigned side; /**< side number. */
} step_env;
break;
}
return 1;
-} /* is_real_follower */
+}
/**
* Do one step in the race.
/* let n be the first node in unwalked */
n = env->unwalked;
while (env->index < n->n_followers) {
- const ir_def_use_edge *edge = &n->node->out[1 + env->index];
+ const ir_def_use_edge *edge = &n->node->o.out->edges[env->index];
/* let m be n.F.def_use[index] */
node_t *m = get_irn_node(edge->use);
env->index = 0;
}
return 1;
-} /* step */
+}
/**
* Clear the flags from a list and check for
n->flagged = 0;
}
return res;
-} /* clear_flags */
+}
/**
* Split a partition by a local list using the race.
partition_t *X_prime;
list_head tmp;
step_env senv[2];
- node_t *g, *h, *node, *t;
+ node_t *g, *h;
int max_input, transitions, winner, shf;
unsigned n;
DEBUG_ONLY(static int run = 0;)
/* Remove gg from X.Leader and put into g */
g = NULL;
- for (node = gg; node != NULL; node = node->next) {
+ for (node_t *node = gg; node != NULL; node = node->next) {
assert(node->part == X);
assert(node->is_follower == 0);
* Some informations on the race that are not stated clearly in Click's
* thesis.
* 1) A follower stays on the side that reach him first.
- * 2) If the other side reches a follower, if will be converted to
+ * 2) If the other side reaches a follower, if will be converted to
* a leader. /This must be done after the race is over, else the
* edges we are iterating on are renumbered./
* 3) /New leader might end up on both sides./
X_prime = new_partition(env);
max_input = 0;
n = 0;
- for (node = senv[winner].walked; node != NULL; node = node->race_next) {
+ for (node_t *node = senv[winner].walked; node != NULL; node = node->race_next) {
list_del(&node->node_list);
node->part = X_prime;
if (node->is_follower) {
check_partition(X);
check_partition(X_prime);
+ dump_partition("Now ", X);
+ dump_partition("Created new ", X_prime);
+
/* X' is the smaller part */
add_to_worklist(X_prime, env);
}
}
- dump_partition("Now ", X);
- dump_partition("Created new ", X_prime);
-
/* we have to ensure that the partition containing g is returned */
if (winner != 0) {
*pX = X_prime;
}
return X_prime;
-} /* split */
+}
/**
* Returns non-zero if the i'th input of a Phi node is live.
}
/* else it's the control input, always live */
return 1;
-} /* is_live_input */
+}
/**
* Return non-zero if a type is a constant.
if (type.tv != tarval_bottom && type.tv != tarval_top)
return 1;
return 0;
-} /* is_constant_type */
+}
/**
* Check whether a type is neither Top or a constant.
return 0;
}
return 1;
-} /* type_is_neither_top_nor_const */
+}
/**
* Collect nodes to the touched list.
*/
static void collect_touched(list_head *list, int idx, environment_t *env)
{
- node_t *x, *y;
+ node_t *y;
int end_idx = env->end_idx;
list_for_each_entry(node_t, x, list, node_list) {
- int num_edges;
-
if (idx == -1) {
/* leader edges start AFTER follower edges */
- x->next_edge = x->n_followers + 1;
+ x->next_edge = x->n_followers;
}
- num_edges = get_irn_n_outs(x->node);
+ unsigned num_edges = get_irn_n_outs(x->node);
/* for all edges in x.L.def_use_{idx} */
- while (x->next_edge <= num_edges) {
- const ir_def_use_edge *edge = &x->node->out[x->next_edge];
+ while (x->next_edge < num_edges) {
+ const ir_def_use_edge *edge = &x->node->o.out->edges[x->next_edge];
ir_node *succ;
/* check if we have necessary edges */
}
}
}
-} /* collect_touched */
+}
/**
* Collect commutative nodes to the touched list.
*/
static void collect_commutative_touched(list_head *list, environment_t *env)
{
- node_t *x, *y;
+ node_t *y;
list_for_each_entry(node_t, x, list, node_list) {
- int num_edges;
-
- num_edges = get_irn_n_outs(x->node);
+ unsigned num_edges = get_irn_n_outs(x->node);
- x->next_edge = x->n_followers + 1;
+ x->next_edge = x->n_followers;
/* for all edges in x.L.def_use_{idx} */
- while (x->next_edge <= num_edges) {
- const ir_def_use_edge *edge = &x->node->out[x->next_edge];
+ while (x->next_edge < num_edges) {
+ const ir_def_use_edge *edge = &x->node->o.out->edges[x->next_edge];
ir_node *succ;
/* check if we have necessary edges */
}
}
}
-} /* collect_commutative_touched */
+}
/**
* Split the partitions if caused by the first entry on the worklist.
assert(n_touched <= Z->n_leader);
}
}
-} /* cause_splits */
+}
/**
* Implements split_by_what(): Split a partition by characteristics given
static partition_t *split_by_what(partition_t *X, what_func What,
partition_t **P, environment_t *env)
{
- node_t *x, *S;
+ node_t *S;
listmap_t map;
listmap_entry_t *iter;
partition_t *R;
listmap_term(&map);
return *P;
-} /* split_by_what */
+}
/** lambda n.(n.type) */
static void *lambda_type(const node_t *node, environment_t *env)
{
(void)env;
return node->type.tv;
-} /* lambda_type */
+}
/** lambda n.(n.opcode) */
static void *lambda_opcode(const node_t *node, environment_t *env)
key.irn = node->node;
- entry = (opcode_key_t*)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;
-} /* lambda_opcode */
+}
/** lambda n.(n[i].partition) */
static void *lambda_partition(const node_t *node, environment_t *env)
pred = i == -1 ? get_irn_n(skipped, i) : get_irn_n(node->node, i);
p = get_irn_node(pred);
return p->part;
-} /* lambda_partition */
+}
/** lambda n.(n[i].partition) for commutative nodes */
static void *lambda_commutative_partition(const node_t *node, environment_t *env)
return p->part;
}
-} /* lambda_commutative_partition */
+}
/**
* Returns true if a type is a constant (and NOT Top
if (is_tarval(type.tv))
return tarval_is_constant(type.tv);
return is_entity(type.sym.entity_p);
-} /* is_con */
+}
/**
* Implements split_by().
}
}
} while (P != NULL);
-} /* split_by */
+}
/**
* (Re-)compute the type for a given node.
node->type.tv = tarval_reachable;
else
node->type.tv = computed_value(irn);
-} /* default_compute */
+}
/**
* (Re-)compute the type for a Block node.
int i;
ir_node *block = node->node;
- if (block == get_irg_start_block(current_ir_graph) || has_Block_entity(block)) {
+ ir_graph *const irg = get_Block_irg(block);
+ if (block == get_irg_start_block(irg) || get_Block_entity(block) != NULL) {
/* start block and labelled blocks are always reachable */
node->type.tv = tarval_reachable;
return;
}
}
node->type.tv = tarval_top;
-} /* compute_Block */
+}
/**
* (Re-)compute the type for a Bad node.
{
/* Bad nodes ALWAYS compute Top */
node->type.tv = tarval_top;
-} /* compute_Bad */
+}
/**
* (Re-)compute the type for an Unknown node.
* (jump threading for instance) might replace them by Phib's...
*/
node->type.tv = tarval_UNKNOWN;
-} /* compute_Unknown */
+}
/**
* (Re-)compute the type for a Jmp node.
node_t *block = get_irn_node(get_nodes_block(node->node));
node->type = block->type;
-} /* compute_Jmp */
+}
/**
* (Re-)compute the type for the Return node.
* This is already checked in compute(). so we can return
* Reachable here. */
node->type.tv = tarval_reachable;
-} /* compute_Return */
+}
/**
* (Re-)compute the type for the End node.
{
/* the End node is NOT dead of course */
node->type.tv = tarval_reachable;
-} /* compute_End */
+}
/**
* (Re-)compute the type for a Call.
* predecessors.
*/
node->type.tv = tarval_bottom;
-} /* compute_Call */
+}
/**
* (Re-)compute the type for a SymConst node.
default:
node->type.tv = computed_value(irn);
}
-} /* compute_SymConst */
+}
/**
* (Re-)compute the type for a Phi node.
/* else nothing, constants are the same */
}
node->type = type;
-} /* compute_Phi */
+}
/**
* (Re-)compute the type for an Add. Special case: one nodes is a Zero Const.
}
node->type.tv = tarval_bottom;
}
-} /* compute_Add */
+}
/**
* (Re-)compute the type for a Sub. Special case: both nodes are congruent.
} else {
node->type.tv = tarval_bottom;
}
-} /* compute_Sub */
+}
/**
* (Re-)compute the type for an Eor. Special case: both nodes are congruent.
} else {
node->type.tv = tarval_bottom;
}
-} /* compute_Eor */
+}
/**
* (Re-)compute the type for Cmp.
} else if (r->part == l->part && !mode_is_float(get_irn_mode(l->node))) {
tv = relation & ir_relation_equal ? tarval_b_true : tarval_b_false;
- /* if the node was ONCE evaluated by all constants, but now
+ /* if the node was ONCE evaluated to a constant, but now
this breaks AND we get from the argument partitions a different
- result, switch to bottom.
+ result, ensure monotony by fall to bottom.
This happens because initially all nodes are in the same partition ... */
- if (node->type.tv != tv)
+ if (node->type.tv == tarval_bottom)
+ tv = tarval_bottom;
+ else if (node->type.tv != tv && is_constant_type(node->type))
tv = tarval_bottom;
node->type.tv = tv;
} else {
if (node->type.tv == tarval_reachable)
return;
- if (get_irn_mode(sel) == mode_b) {
- /* an IF */
- if (pnc == pn_Cond_true) {
- if (selector->type.tv == tarval_b_false) {
- node->type.tv = tarval_unreachable;
- } else if (selector->type.tv == tarval_b_true) {
- node->type.tv = tarval_reachable;
- } else if (selector->type.tv == tarval_bottom) {
- node->type.tv = tarval_reachable;
- } else {
- assert(selector->type.tv == tarval_top);
- if (tarval_UNKNOWN == tarval_top) {
- /* any condition based on Top is "!=" */
- node->type.tv = tarval_unreachable;
- } else {
- node->type.tv = tarval_unreachable;
- }
- }
+ if (pnc == pn_Cond_true) {
+ if (selector->type.tv == tarval_b_false) {
+ node->type.tv = tarval_unreachable;
+ } else if (selector->type.tv == tarval_b_true) {
+ node->type.tv = tarval_reachable;
+ } else if (selector->type.tv == tarval_bottom) {
+ node->type.tv = tarval_reachable;
} else {
- assert(pnc == pn_Cond_false);
-
- if (selector->type.tv == tarval_b_false) {
- node->type.tv = tarval_reachable;
- } else if (selector->type.tv == tarval_b_true) {
+ assert(selector->type.tv == tarval_top);
+ if (tarval_UNKNOWN == tarval_top) {
+ /* any condition based on Top is "!=" */
node->type.tv = tarval_unreachable;
- } else if (selector->type.tv == tarval_bottom) {
- node->type.tv = tarval_reachable;
} else {
- assert(selector->type.tv == tarval_top);
- if (tarval_UNKNOWN == tarval_top) {
- /* any condition based on Top is "!=" */
- node->type.tv = tarval_reachable;
- } else {
- node->type.tv = tarval_unreachable;
- }
+ node->type.tv = tarval_unreachable;
}
}
} else {
- /* an SWITCH */
- if (selector->type.tv == tarval_bottom) {
+ assert(pnc == pn_Cond_false);
+
+ if (selector->type.tv == tarval_b_false) {
+ node->type.tv = tarval_reachable;
+ } else if (selector->type.tv == tarval_b_true) {
+ node->type.tv = tarval_unreachable;
+ } else if (selector->type.tv == tarval_bottom) {
node->type.tv = tarval_reachable;
- } else if (selector->type.tv == tarval_top) {
- if (tarval_UNKNOWN == tarval_top &&
- pnc == get_Cond_default_proj(cond)) {
- /* a switch based of Top is always "default" */
+ } else {
+ assert(selector->type.tv == tarval_top);
+ if (tarval_UNKNOWN == tarval_top) {
+ /* any condition based on Top is "!=" */
node->type.tv = tarval_reachable;
} else {
node->type.tv = tarval_unreachable;
}
+ }
+ }
+}
+
+static void compute_Proj_Switch(node_t *node, ir_node *switchn)
+{
+ ir_node *proj = node->node;
+ long pnc = get_Proj_proj(proj);
+ ir_node *sel = get_Switch_selector(switchn);
+ node_t *selector = get_irn_node(sel);
+
+ /* see long comment in compute_Proj_Cond */
+ if (node->type.tv == tarval_reachable)
+ return;
+
+ if (selector->type.tv == tarval_bottom) {
+ node->type.tv = tarval_reachable;
+ } else if (selector->type.tv == tarval_top) {
+ if (tarval_UNKNOWN == tarval_top && pnc == pn_Switch_default) {
+ /* a switch based of Top is always "default" */
+ node->type.tv = tarval_reachable;
} else {
- long value = get_tarval_long(selector->type.tv);
- if (pnc == get_Cond_default_proj(cond)) {
- /* default switch, have to check ALL other cases */
- int i;
-
- for (i = get_irn_n_outs(cond) - 1; i >= 0; --i) {
- ir_node *succ = get_irn_out(cond, i);
-
- if (succ == proj)
- continue;
- if (value == get_Proj_proj(succ)) {
- /* we found a match, will NOT take the default case */
- node->type.tv = tarval_unreachable;
- return;
- }
+ node->type.tv = tarval_unreachable;
+ }
+ } else {
+ long value = get_tarval_long(selector->type.tv);
+ const ir_switch_table *table = get_Switch_table(switchn);
+ size_t n_entries = ir_switch_table_get_n_entries(table);
+ size_t e;
+
+ for (e = 0; e < n_entries; ++e) {
+ const ir_switch_table_entry *entry
+ = ir_switch_table_get_entry_const(table, e);
+ ir_tarval *min = entry->min;
+ ir_tarval *max = entry->max;
+ if (min == max) {
+ if (selector->type.tv == min) {
+ node->type.tv = entry->pn == pnc
+ ? tarval_reachable : tarval_unreachable;
+ return;
}
- /* all cases checked, no match, will take default case */
- node->type.tv = tarval_reachable;
} else {
- /* normal case */
- node->type.tv = value == pnc ? tarval_reachable : tarval_unreachable;
+ long minval = get_tarval_long(min);
+ long maxval = get_tarval_long(max);
+ if (minval <= value && value <= maxval) {
+ node->type.tv = entry->pn == pnc
+ ? tarval_reachable : tarval_unreachable;
+ return;
+ }
}
}
+
+ /* no entry matched: default */
+ node->type.tv
+ = pnc == pn_Switch_default ? tarval_reachable : tarval_unreachable;
}
-} /* compute_Proj_Cond */
+}
/**
- * (Re-)compute the type for a Proj-Node.
- *
- * @param node the node
- */
+* (Re-)compute the type for a Proj-Node.
+*
+* @param node the node
+*/
static void compute_Proj(node_t *node)
{
- ir_node *proj = node->node;
+ir_node *proj = node->node;
ir_mode *mode = get_irn_mode(proj);
node_t *block = get_irn_node(get_nodes_block(skip_Proj(proj)));
ir_node *pred = get_Proj_pred(proj);
node->type.tv = tarval_top;
return;
}
- if (get_irn_node(pred)->type.tv == tarval_top && !is_Cond(pred)) {
+ if (get_irn_node(pred)->type.tv == tarval_top && !is_Cond(pred) && !is_Switch(pred)) {
/* if the predecessor is Top, its Proj follow */
node->type.tv = tarval_top;
return;
case iro_Cond:
compute_Proj_Cond(node, pred);
return;
+ case iro_Switch:
+ compute_Proj_Switch(node, pred);
+ return;
default:
break;
}
}
default_compute(node);
-} /* compute_Proj */
+}
/**
* (Re-)compute the type for a Confirm.
}
/* a Confirm is a copy OR a Const */
node->type = pred->type;
-} /* compute_Confirm */
+}
/**
* (Re-)compute the type for a given node.
func = (compute_func)node->node->op->ops.generic;
if (func != NULL)
func(node);
-} /* compute */
+}
/*
* Identity functions: Note that one might think that identity() is just a
* tarval_top, is in the TOP partition and should NOT being split! */
assert(n_part != NULL);
return n_part;
-} /* identity_Phi */
+}
/**
* Calculates the Identity for commutative 0 neutral nodes.
if (b->type.tv == zero)
return a;
return node;
-} /* identity_comm_zero_binop */
+}
/**
* Calculates the Identity for Shift nodes.
if (b->type.tv == zero)
return get_irn_node(get_binop_left(op));
return node;
-} /* identity_shift */
+}
/**
* Calculates the Identity for Mul nodes.
if (b->type.tv == one)
return a;
return node;
-} /* identity_Mul */
+}
/**
* Calculates the Identity for Sub nodes.
if (b->type.tv == get_mode_null(mode))
return get_irn_node(get_Sub_left(sub));
return node;
-} /* identity_Sub */
+}
/**
* Calculates the Identity for And nodes.
if (b->type.tv == neutral)
return a;
return node;
-} /* identity_And */
+}
/**
* Calculates the Identity for Confirm nodes.
/* a Confirm is always a Copy */
return get_irn_node(get_Confirm_value(confirm));
-} /* identity_Confirm */
+}
/**
* Calculates the Identity for Mux nodes.
return t;
/* for now, the 1-input identity is not supported */
-#if 0
- sel = get_irn_node(get_Mux_sel(mux));
-
- /* Mux sel input is mode_b, so it is always a tarval */
- if (sel->type.tv == tarval_b_true)
- return t;
- if (sel->type.tv == tarval_b_false)
- return f;
-#endif
return node;
-} /* identity_Mux */
+}
/**
* Calculates the Identity for nodes.
default:
return node;
}
-} /* identity */
+}
/**
* Node follower is a (new) follower of leader, segregate Leader
*/
static void segregate_def_use_chain_1(const ir_node *follower, node_t *leader)
{
- ir_node *l = leader->node;
- int j, i, n = get_irn_n_outs(l);
-
DB((dbg, LEVEL_2, "%+F is a follower of %+F\n", follower, leader->node));
/* The leader edges must remain sorted, but follower edges can
be unsorted. */
- for (i = leader->n_followers + 1; i <= n; ++i) {
- if (l->out[i].use == follower) {
- ir_def_use_edge t = l->out[i];
-
- for (j = i - 1; j >= leader->n_followers + 1; --j)
- l->out[j + 1] = l->out[j];
+ ir_node *l = leader->node;
+ unsigned n = get_irn_n_outs(l);
+ for (unsigned i = leader->n_followers; i < n; ++i) {
+ if (l->o.out->edges[i].use == follower) {
+ ir_def_use_edge t = l->o.out->edges[i];
+
+ for (unsigned j = i; j-- > leader->n_followers; )
+ l->o.out->edges[j+1] = l->o.out->edges[j];
+ l->o.out->edges[leader->n_followers] = t;
++leader->n_followers;
- l->out[leader->n_followers] = t;
break;
}
}
-} /* segregate_def_use_chain_1 */
+}
/**
* Node follower is a (new) follower segregate its Leader
segregate_def_use_chain_1(follower, pred);
}
-} /* segregate_def_use_chain */
+}
/**
* Propagate constant evaluation.
lattice_elem_t old_type;
node_t *fallen;
unsigned n_fallen, old_type_was_T_or_C;
- int i;
while (env->cprop != NULL) {
void *oldopcode = NULL;
/* x will make the follower -> leader transition */
follower_to_leader(x);
+
+ /* In case of a follower -> leader transition of a Phi node
+ * we have to ensure that the current partition will be split
+ * by lambda n.(n[i].partition).
+ *
+ * This split may already happened before when some predecessors
+ * of the Phi's Block are unreachable. Thus, we have to put the
+ * current partition in the worklist to repeat the check.
+ */
+ if (is_Phi(x->node) && ! x->part->on_worklist)
+ add_to_worklist(x->part, env);
}
/* compute a new type for x */
++n_fallen;
DB((dbg, LEVEL_2, "Add node %+F to fallen\n", x->node));
}
- for (i = get_irn_n_outs(x->node) - 1; i >= 0; --i) {
+ for (unsigned i = get_irn_n_outs(x->node); i-- > 0; ) {
ir_node *succ = get_irn_out(x->node, i);
node_t *y = get_irn_node(succ);
x->on_fallen = 0;
if (old_type_was_T_or_C) {
- node_t *y, *tmp;
-
/* check if some nodes will make the leader -> follower transition */
list_for_each_entry_safe(node_t, y, tmp, &Y->Leader, node_list) {
if (y->type.tv != tarval_top && ! is_con(y->type)) {
}
split_by(Y, env);
}
-} /* propagate */
+}
/**
* Get the leader for a given node from its congruence class.
return get_first_node(part)->node;
}
return node->node;
-} /* get_leader */
+}
/**
* Returns non-zero if a mode_T node has only one reachable output.
*/
static int only_one_reachable_proj(ir_node *n)
{
- int i, k = 0;
+ int k = 0;
- for (i = get_irn_n_outs(n) - 1; i >= 0; --i) {
+ for (unsigned i = get_irn_n_outs(n); i-- > 0; ) {
ir_node *proj = get_irn_out(n, i);
node_t *node;
}
}
return 1;
-} /* only_one_reachable_proj */
+}
/**
* Return non-zero if the control flow predecessor node pred
*/
static int can_exchange(ir_node *pred, ir_node *block)
{
- if (is_Start(pred) || has_Block_entity(block))
+ if (is_Start(pred) || get_Block_entity(block) != NULL)
return 0;
else if (is_Jmp(pred))
return 1;
+ else if (is_Raise(pred)) {
+ /* Raise is a tuple and usually has only one reachable ProjX,
+ * but it must not be eliminated like a Jmp */
+ return 0;
+ }
else if (get_irn_mode(pred) == mode_T) {
/* if the predecessor block has more than one
reachable outputs we cannot remove the block */
return only_one_reachable_proj(pred);
}
return 0;
-} /* can_exchange */
+}
/**
* Block Post-Walker, apply the analysis results on control flow by
}
}
- /* the EndBlock is always reachable even if the analysis
- finds out the opposite :-) */
- if (block != get_irg_end_block(current_ir_graph)) {
- /* mark dead blocks */
- //set_Block_dead(block);
- //ir_graph *irg = get_irn_irg(block);
- //exchange(block, get_irg_bad(irg));
- DB((dbg, LEVEL_1, "Removing dead %+F\n", block));
- } else {
- /* the endblock is unreachable */
+ ir_graph *const irg = get_Block_irg(block);
+ if (block == get_irg_end_block(irg)) {
+ /* Analysis found out that the end block is unreachable,
+ * hence we remove all its control flow predecessors. */
set_irn_in(block, 0, NULL);
}
return;
}
set_irn_in(block, k, in_X);
env->modified = 1;
-} /* apply_cf */
+}
/**
* Exchange a node by its leader.
}
}
exchange(irn, leader);
-} /* exchange_leader */
+}
/**
* Check, if all users of a mode_M node are dead. Use
*/
static int all_users_are_dead(const ir_node *irn)
{
- int i, n = get_irn_n_outs(irn);
-
- for (i = 1; i <= n; ++i) {
- const ir_node *succ = irn->out[i].use;
+ unsigned n = get_irn_n_outs(irn);
+ for (unsigned i = 0; i < n; ++i) {
+ const ir_node *succ = get_irn_out(irn, i);
const node_t *block = get_irn_node(get_nodes_block(succ));
const node_t *node;
}
/* all users are unreachable */
return 1;
-} /* all_user_are_dead */
+}
/**
* Walker: Find reachable mode_M nodes that have only
DB((dbg, LEVEL_1, "%+F must be kept\n", irn));
ARR_APP1(ir_node *, env->kept_memory, irn);
}
-} /* find_kept_memory */
+}
/**
* Post-Walker, apply the analysis results;
node_t *block = get_irn_node(get_nodes_block(irn));
if (block->type.tv == tarval_unreachable) {
- ir_node *bad = get_irg_bad(current_ir_graph);
+ ir_graph *irg = get_irn_irg(irn);
+ ir_mode *mode = get_irn_mode(node->node);
+ ir_node *bad = new_r_Bad(irg, mode);
/* here, bad might already have a node, but this can be safely ignored
as long as bad has at least ONE valid node */
/* leave or Jmp */
ir_node *cond = get_Proj_pred(irn);
- if (is_Cond(cond)) {
+ if (is_Cond(cond) || is_Switch(cond)) {
if (only_one_reachable_proj(cond)) {
ir_node *jmp = new_r_Jmp(block->node);
set_irn_node(jmp, node);
exchange(irn, jmp);
env->modified = 1;
} else {
- node_t *sel = get_irn_node(get_Cond_selector(cond));
- ir_tarval *tv = sel->type.tv;
-
- if (is_tarval(tv) && tarval_is_constant(tv)) {
- /* The selector is a constant, but more
- * than one output is active: An unoptimized
- * case found. */
- env->unopt_cf = 1;
+ if (is_Switch(cond)) {
+ node_t *sel = get_irn_node(get_Switch_selector(cond));
+ ir_tarval *tv = sel->type.tv;
+
+ if (is_tarval(tv) && tarval_is_constant(tv)) {
+ /* The selector is a constant, but more
+ * than one output is active: An unoptimized
+ * case found. */
+ env->unopt_cf = 1;
+ }
}
}
}
}
}
}
-} /* apply_result */
+}
/**
* Fix the keep-alives by deleting unreachable ones.
set_End_keepalives(end, j, in);
env->modified = 1;
}
-} /* apply_end */
+}
#define SET(code) op_##code->ops.generic = (op_func)compute_##code
size_t i, n;
/* set the default compute function */
- for (i = 0, n = get_irp_n_opcodes(); i < n; ++i) {
- ir_op *op = get_irp_opcode(i);
+ for (i = 0, n = ir_get_n_opcodes(); i < n; ++i) {
+ ir_op *op = ir_get_opcode(i);
op->ops.generic = (op_func)default_compute;
}
SET(Return);
SET(End);
SET(Call);
-} /* set_compute_functions */
+}
/**
* Add memory keeps.
}
}
ir_nodeset_destroy(&set);
-} /* add_memory_keeps */
+}
void combo(ir_graph *irg)
{
ir_graph *rem = current_ir_graph;
size_t len;
+ assure_irg_properties(irg,
+ IR_GRAPH_PROPERTY_NO_BADS
+ | IR_GRAPH_PROPERTY_CONSISTENT_OUTS
+ | IR_GRAPH_PROPERTY_CONSISTENT_LOOPINFO);
+
current_ir_graph = irg;
/* register a debug mask */
env.commutative = 1;
env.opt_unknown = 1;
- assure_irg_outs(irg);
- assure_cf_loop(irg);
-
/* we have our own value_of function */
set_value_of_func(get_node_tarval);
set_compute_functions();
- DEBUG_ONLY(part_nr = 0);
+ DEBUG_ONLY(part_nr = 0;)
ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
irg_walk_graph(irg, create_initial_partitions, init_block_phis, &env);
/* set the hook: from now, every node has a partition and a type */
- DEBUG_ONLY(set_dump_node_vcgattr_hook(dump_partition_hook));
+ DEBUG_ONLY(set_dump_node_vcgattr_hook(dump_partition_hook);)
/* all nodes on the initial partition have type Top */
env.initial->type_is_T_or_C = 1;
dump_all_partitions(&env);
check_all_partitions(&env);
-#if 0
- dump_ir_block_graph(irg, "-partition");
-#endif
-
/* apply the result */
/* check, which nodes must be kept */
DB((dbg, LEVEL_1, "Unoptimized Control Flow left"));
}
- if (env.modified) {
- /* control flow might changed */
- set_irg_outs_inconsistent(irg);
- set_irg_extblk_inconsistent(irg);
- set_irg_doms_inconsistent(irg);
- set_irg_loopinfo_inconsistent(irg);
- set_irg_entity_usage_state(irg, ir_entity_usage_not_computed);
- }
-
ir_free_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
/* remove the partition hook */
- DEBUG_ONLY(set_dump_node_vcgattr_hook(NULL));
+ DEBUG_ONLY(set_dump_node_vcgattr_hook(NULL);)
DEL_ARR_F(env.kept_memory);
del_set(env.opcode2id_map);
/* restore value_of() default behavior */
set_value_of_func(NULL);
current_ir_graph = rem;
-} /* combo */
+
+ confirm_irg_properties(irg, IR_GRAPH_PROPERTIES_NONE);
+}
/* Creates an ir_graph pass for combo. */
ir_graph_pass_t *combo_pass(const char *name)
{
return def_graph_pass(name ? name : "combo", combo);
-} /* combo_pass */
+}
projects / libfirm / blobdiff