X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fstat%2Fdags.c;h=debb813bc731fd183de0b1c0226dbbfebdd7e67b;hb=e1c05b012f012400bf9f3b807b11fb6eafd3b99b;hp=5b3caeced2964c33945d8636555c925361f39c62;hpb=7f443d190f851ff3c38508253495470421fdb439;p=libfirm diff --git a/ir/stat/dags.c b/ir/stat/dags.c index 5b3caeced..debb813bc 100644 --- a/ir/stat/dags.c +++ b/ir/stat/dags.c @@ -1,61 +1,71 @@ /* - * Project: libFIRM - * File name: ir/ir/dags.c - * Purpose: Statistics for Firm. DAG's in graphs. - * Author: Michael Beck - * Created: - * CVS-ID: $Id$ - * Copyright: (c) 2004 Universität Karlsruhe - * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE. + * Copyright (C) 1995-2008 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. */ -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif +/** + * @file + * @brief Statistics for Firm. DAG's in graphs. + * @author Michael Beck + * @version $Id$ + */ +#include "config.h" #include #include "irprintf.h" #include "irdump.h" #include "dags.h" +#include "irtools.h" enum dag_counting_options_t { - FIRMSTAT_COPY_CONSTANTS = 0x00000001, /**< if set, constants will be treated as they are in - the same block as its successors */ + FIRMSTAT_COPY_CONSTANTS = 0x00000001, /**< if set, constants will be treated as they are in + the same block as its successors */ + FIRMSTAT_LOAD_IS_LEAVE = 0x00000002, /**< Load nodes are always leaves */ + FIRMSTAT_CALL_IS_LEAVE = 0x00000004, /**< Call nodes are always leaves */ + FIRMSTAT_ARGS_ARE_ROOTS = 0x00000008, /**< arguments (Proj(Proj(Start)) are roots */ }; -/** - * walker for clearing node links - */ -static void clear_links(ir_node *node, void *env) -{ - set_irn_link(node, NULL); -} - typedef struct _dag_entry_t dag_entry_t; /** * Environment for connecting DAG's */ typedef struct _dag_env_t { - struct obstack obst; - unsigned num_of_dags; - dag_entry_t *list_of_dags; - unsigned options; /**< DAG counting options */ + struct obstack obst; + unsigned num_of_dags; /**< Number of found DAGs so far. */ + dag_entry_t *list_of_dags; /**< List of found DAGs. */ + unsigned options; /**< DAG counting options. */ } dag_env_t; /** * a DAG Entry */ struct _dag_entry_t { - unsigned id; /**< assigned ID for this DAG */ - ir_node *root; /**< one root of the DAG */ - unsigned num_roots; /**< number of root nodes in the DAG */ - unsigned num_nodes; /**< overall number of nodes in the DAG */ - unsigned num_inner_nodes; /**< number of inner nodes in the DAG */ - unsigned is_dead; /**< marks a dead entry */ - dag_entry_t *next; /**< link all entries of a DAG */ - dag_entry_t *link; /**< if set, this entry is an ID */ + unsigned id; /**< assigned ID for this DAG */ + ir_node *root; /**< one root of the DAG */ + unsigned num_roots; /**< number of root nodes in the DAG */ + unsigned num_nodes; /**< overall number of nodes in the DAG */ + unsigned num_inner_nodes; /**< number of inner nodes in the DAG */ + unsigned is_dead:1; /**< marks a dead entry */ + unsigned is_tree:1; /**< True if this DAG is a tree. */ + unsigned is_ext_ref:1; /**< True if this DAG is external referenced, so it cannot be combined. */ + dag_entry_t *next; /**< link all entries of a DAG */ + dag_entry_t *link; /**< if set, this entry is an ID */ }; /** @@ -63,193 +73,337 @@ struct _dag_entry_t { */ static dag_entry_t *get_irn_dag_entry(ir_node *n) { - dag_entry_t *res = get_irn_link(n); + dag_entry_t *p = get_irn_link(n); + + if (p) { + /* skip any dead links */ + if (p->link) { + do { + p = p->link; + } while (p->link != NULL); + set_irn_link(n, p); + } + } /* if */ + return p; +} /* get_irn_dag_entry */ - if (res) { - dag_entry_t *p; +#define set_irn_dag_entry(n, e) set_irn_link(n, e) - for (p = res; p->link; p = p->link); +/** + * checks whether a node is an arg + */ +static int is_arg(ir_node *node) +{ + if (! is_Proj(node)) + return 0; - if (p != res) - set_irn_link(n, p); + node = get_Proj_pred(node); + if (! is_Proj(node)) + return 0; - return p; - } - return NULL; -} + node = get_Proj_pred(node); + return is_Start(node); +} /* is_arg */ -#define set_irn_dag_entry(n, e) set_irn_link(n, e) +/** + * Allocate a new DAG entry. + */ +static dag_entry_t *new_dag_entry(dag_env_t *dag_env, ir_node *node) +{ + dag_entry_t *entry = OALLOC(&dag_env->obst, dag_entry_t); + + entry->num_nodes = 1; + entry->num_roots = 1; + entry->num_inner_nodes = 0; + entry->root = node; + entry->is_dead = 0; + entry->is_tree = 1; + entry->is_ext_ref = 0; + entry->next = dag_env->list_of_dags; + entry->link = NULL; + + ++dag_env->num_of_dags; + dag_env->list_of_dags = entry; + + set_irn_dag_entry(node, entry); + return entry; +} /* new_dag_entry */ /** - * walker for connecting DAGs and counting. + * Post-walker to detect DAG roots that are referenced form other blocks + */ +static void find_dag_roots(ir_node *node, void *env) +{ + dag_env_t *dag_env = env; + int i, arity; + dag_entry_t *entry; + ir_node *block; + + if (is_Block(node)) + return; + + block = get_nodes_block(node); + + /* ignore start end end blocks */ + if (block == get_irg_start_block(current_ir_graph) || + block == get_irg_end_block(current_ir_graph)) { + return; + } /* if */ + + /* Phi nodes always references nodes from "other" block */ + if (is_Phi(node)) { + if (get_irn_mode(node) != mode_M) { + for (i = 0, arity = get_irn_arity(node); i < arity; ++i) { + ir_node *prev = get_irn_n(node, i); + + if (is_Phi(prev)) + continue; + + if (dag_env->options & FIRMSTAT_COPY_CONSTANTS) { + if (is_irn_constlike(prev)) + continue; + } /* if */ + + entry = get_irn_dag_entry(prev); + + if (! entry) { + /* found an unassigned node, a new root */ + entry = new_dag_entry(dag_env, node); + entry->is_ext_ref = 1; + } /* if */ + } /* for */ + } /* if */ + } else { + + for (i = 0, arity = get_irn_arity(node); i < arity; ++i) { + ir_node *prev = get_irn_n(node, i); + ir_mode *mode = get_irn_mode(prev); + + if (mode == mode_X || mode == mode_M) + continue; + + if (is_Phi(prev)) + continue; + + if (dag_env->options & FIRMSTAT_COPY_CONSTANTS) { + if (is_irn_constlike(prev)) + continue; + } /* if */ + + if (get_nodes_block(prev) != block) { + /* The predecessor is from another block. It forms + a root. */ + entry = get_irn_dag_entry(prev); + if (! entry) { + /* found an unassigned node, a new root */ + entry = new_dag_entry(dag_env, node); + entry->is_ext_ref = 1; + } /* if */ + } /* if */ + } /* for */ + } /* if */ +} /* find_dag_roots */ + +/** + * Pre-walker for connecting DAGs and counting. */ static void connect_dags(ir_node *node, void *env) { - dag_env_t *dag_env = env; - int i, arity; - ir_node *block; - dag_entry_t *entry; - ir_mode *mode; - - if (is_Block(node)) - return; - - block = get_nodes_block(node); - - /* ignore start end end blocks */ - if (block == get_irg_start_block(current_ir_graph) || - block == get_irg_end_block(current_ir_graph)) - return; - - if (is_Phi(node)) - return; - - mode = get_irn_mode(node); - if (mode == mode_X || mode == mode_M) { - /* do NOT count mode_X nodes */ - return; - } - - entry = get_irn_dag_entry(node); - - if (! entry) { - /* found a not assigned node, maybe a new root */ - entry = obstack_alloc(&dag_env->obst, sizeof(*entry)); - - entry->num_nodes = 1; - entry->num_roots = 1; - entry->num_inner_nodes = 0; - entry->root = node; - entry->is_dead = 0; - entry->next = dag_env->list_of_dags; - entry->link = NULL; - - ++dag_env->num_of_dags; - dag_env->list_of_dags = entry; - - set_irn_dag_entry(node, entry); - } - - /* put the predecessors into the same DAG as the current */ - for (i = 0, arity = get_irn_arity(node); i < arity; ++i) { - ir_node *prev = get_irn_n(node, i); - ir_mode *mode = get_irn_mode(prev); - - if (is_Phi(prev)) - continue; - - if (mode == mode_X || mode == mode_M) - continue; - - /* - * copy constants if requested into the DAG's - * beware, do NOT add a link, as this will result in - * wrong intersections - */ - if (dag_env->options & FIRMSTAT_COPY_CONSTANTS) { - if (get_irn_op(prev) == op_Const || get_irn_op(prev) == op_SymConst) { - ++entry->num_nodes; - ++entry->num_inner_nodes; - } - } - - /* only nodes from the same block goes into the DAG */ - if (get_nodes_block(prev) == block) { - dag_entry_t *prev_entry = get_irn_dag_entry(prev); - - if (! prev_entry) { - /* not assigned node, put it into the same DAG */ - set_irn_dag_entry(prev, entry); - ++entry->num_nodes; - ++entry->num_inner_nodes; - } - else { - if (prev_entry != entry) { - - /* two DAGs intersect */ - entry->num_roots += prev_entry->num_roots; - entry->num_nodes += prev_entry->num_nodes; - entry->num_inner_nodes += prev_entry->num_inner_nodes; - - --dag_env->num_of_dags; - - prev_entry->is_dead = 1; - prev_entry->link = entry; - } - } - } - } -} + dag_env_t *dag_env = env; + int i, arity; + ir_node *block; + dag_entry_t *entry; + ir_mode *mode; + + if (is_Block(node)) + return; + + block = get_nodes_block(node); + + /* ignore start end end blocks */ + if (block == get_irg_start_block(current_ir_graph) || + block == get_irg_end_block(current_ir_graph)) { + return; + } /* if */ + + /* ignore Phi nodes */ + if (is_Phi(node)) + return; + + if (dag_env->options & FIRMSTAT_ARGS_ARE_ROOTS && is_arg(node)) + return; + + mode = get_irn_mode(node); + if (mode == mode_X || mode == mode_M) { + /* do NOT count mode_X and mode_M nodes */ + return; + } /* if */ + + /* if this option is set, Loads are always leaves */ + if (dag_env->options & FIRMSTAT_LOAD_IS_LEAVE && is_Load(node)) + return; + + if (dag_env->options & FIRMSTAT_CALL_IS_LEAVE && is_Call(node)) + return; + + entry = get_irn_dag_entry(node); + + if (! entry) { + /* found an unassigned node, maybe a new root */ + entry = new_dag_entry(dag_env, node); + } /* if */ + + /* put the predecessors into the same DAG as the current */ + for (i = 0, arity = get_irn_arity(node); i < arity; ++i) { + ir_node *prev = get_irn_n(node, i); + ir_mode *mode = get_irn_mode(prev); + + if (is_Phi(prev)) + continue; + + if (mode == mode_X || mode == mode_M) + continue; + + /* + * copy constants if requested into the DAG's + * beware, do NOT add a link, as this will result in + * wrong intersections + */ + if (dag_env->options & FIRMSTAT_COPY_CONSTANTS) { + if (is_irn_constlike(prev)) { + ++entry->num_nodes; + ++entry->num_inner_nodes; + } /* if */ + } /* if */ + + /* only nodes from the same block goes into the DAG */ + if (get_nodes_block(prev) == block) { + dag_entry_t *prev_entry = get_irn_dag_entry(prev); + + if (! prev_entry) { + /* not assigned node, put it into the same DAG */ + set_irn_dag_entry(prev, entry); + ++entry->num_nodes; + ++entry->num_inner_nodes; + } else { + if (prev_entry == entry) { + /* We found a node that is already assigned to this DAG. + This DAG is not a tree. */ + entry->is_tree = 0; + } else { + /* two DAGs intersect: copy the data to one of them + and kill the other */ + entry->num_roots += prev_entry->num_roots; + entry->num_nodes += prev_entry->num_nodes; + entry->num_inner_nodes += prev_entry->num_inner_nodes; + entry->is_tree &= prev_entry->is_tree; + + --dag_env->num_of_dags; + + prev_entry->is_dead = 1; + prev_entry->link = entry; + } /* if */ + } /* if */ + } /* if */ + } /* for */ +} /* connect_dags */ + +#define DEFAULT_RET 1 +#define COLOR_RET 1 + +static unsigned mark_options; /** * a vcg attribute hook */ static int stat_dag_mark_hook(FILE *F, ir_node *n, ir_node *l) { - static const char *colors[] = { "purple", "pink", "lightblue", "orange", "khaki", "orchid", "lilac", "turquoise" }; - dag_entry_t *entry; + static const char *colors[] = { "purple", "pink", "lightblue", "orange", "khaki", "orchid", "lilac", "turquoise" }; + dag_entry_t *entry; + + /* do not count Bad / NoMem */ + if (l) { + ir_op *op = get_irn_op(l); + + if (op == op_NoMem || op == op_Bad) + return DEFAULT_RET; - /* do not count Bad / NoMem */ - if (l && (get_irn_op(l) == op_NoMem || get_irn_op(l) == op_Bad)) - return 0; + /* check for additional options */ + op = get_irn_op(n); - entry = get_irn_dag_entry(n); - if (! entry) - return 0; + if (mark_options & FIRMSTAT_LOAD_IS_LEAVE && op == op_Load) + return DEFAULT_RET; - fprintf(F, "color: %s info3: \"DAG id: %u\"", colors[entry->id & 7], entry->id); + if (mark_options & FIRMSTAT_CALL_IS_LEAVE && op == op_Call) + return DEFAULT_RET; + } /* if */ - /* I know the color! */ - return 1; -} + entry = get_irn_dag_entry(n); + if (! entry) + return DEFAULT_RET; + + fprintf(F, "color: %s info3: \"DAG id: %u\"", colors[entry->id & 7], entry->id); + + /* I know the color! */ + return COLOR_RET; +} /* stat_dag_mark_hook */ /** * count the DAG's size of a graph + * + * @param global the global entry + * @param graph the current graph entry */ void count_dags_in_graph(graph_entry_t *global, graph_entry_t *graph) { - dag_env_t root_env; - dag_entry_t *entry; - unsigned id; + dag_env_t root_env; + dag_entry_t *entry; + unsigned id; + (void) global; + + /* do NOT check the const code irg */ + if (graph->irg == get_const_code_irg()) + return; - /* do NOT check the const code irg */ - if (graph->irg == get_const_code_irg()) - return; + /* first step, clear the links */ + irg_walk_graph(graph->irg, firm_clear_link, NULL, NULL); - /* first step, clear the links */ - irg_walk_graph(graph->irg, clear_links, NULL, NULL); + obstack_init(&root_env.obst); + root_env.num_of_dags = 0; + root_env.list_of_dags = NULL; + root_env.options = FIRMSTAT_COPY_CONSTANTS | FIRMSTAT_LOAD_IS_LEAVE | FIRMSTAT_CALL_IS_LEAVE; - obstack_init(&root_env.obst); - root_env.num_of_dags = 0; - root_env.list_of_dags = NULL; - root_env.options = FIRMSTAT_COPY_CONSTANTS; + /* find the DAG roots that are referenced from other block */ + irg_walk_graph(graph->irg, NULL, find_dag_roots, &root_env); - /* count them */ - irg_walk_graph(graph->irg, connect_dags, NULL, &root_env); + /* connect and count them */ + irg_walk_graph(graph->irg, connect_dags, NULL, &root_env); - printf("Graph %p %s --- %d\n", graph->irg, get_entity_name(get_irg_entity(graph->irg)), - root_env.num_of_dags); + printf("Graph %p %s --- %u\n", (void *)graph->irg, get_entity_name(get_irg_entity(graph->irg)), + root_env.num_of_dags); - for (id = 0, entry = root_env.list_of_dags; entry; entry = entry->next) { - if (entry->is_dead) - continue; - entry->id = id++; + for (id = 0, entry = root_env.list_of_dags; entry; entry = entry->next) { + if (entry->is_dead) + continue; + entry->id = id++; - printf("number of roots %d number of nodes %d inner %d %ld\n", - entry->num_roots, - entry->num_nodes, - entry->num_inner_nodes, - get_irn_node_nr(entry->root)); - } + printf("number of roots %u number of nodes %u inner %u tree %u %ld\n", + entry->num_roots, + entry->num_nodes, + entry->num_inner_nodes, + entry->is_tree, + get_irn_node_nr(entry->root)); + } /* for */ #if 1 - /* dump for test */ - set_dump_node_vcgattr_hook(stat_dag_mark_hook); - dump_ir_block_graph(graph->irg, "-dag"); - set_dump_node_vcgattr_hook(NULL); + /* dump for test */ + mark_options = root_env.options; + set_dump_node_vcgattr_hook(stat_dag_mark_hook); + dump_ir_graph(graph->irg, "-dag"); + set_dump_node_vcgattr_hook(NULL); #endif - assert(id == root_env.num_of_dags); + assert(id == root_env.num_of_dags); - obstack_free(&root_env.obst, NULL); -} + obstack_free(&root_env.obst, NULL); +} /* count_dags_in_graph */