-#ifdef HAVE_CONFIG_H
+/*
+ * This file is part of libFirm.
+ * Copyright (C) 2012 University of Karlsruhe.
+ */
+
+/**
+ * @file
+ * @brief Contains some useful function for the backend.
+ * @author Sebastian Hack
+ */
#include "config.h"
-#endif
#include <stdio.h>
#include "irgopt.h"
#include "irtools.h"
#include "irprintf.h"
+#include "iredges_t.h"
#include "beutil.h"
-#include "besched_t.h"
+#include "besched.h"
#include "bearch.h"
-/* Get an always empty set. */
-pset *be_empty_set(void)
-{
- static pset *empty_set = NULL;
-
- if(!empty_set)
- empty_set = pset_new_ptr(1);
-
- assert(pset_count(empty_set) == 0);
- return empty_set;
-}
-
-struct dump_env {
- FILE *f;
- arch_env_t *env;
-};
-
-static void dump_allocated_block(ir_node *block, void *data)
-{
- int i, n;
- const ir_node *irn;
- struct dump_env *dump_env = data;
- FILE *f = dump_env->f;
- arch_env_t *env = dump_env->env;
-
- ir_fprintf(f, "node:{title:\"b%N\"\nlabel:\"", block);
- sched_foreach(block, irn) {
- const char *prefix = "";
-
- const arch_register_t *reg = arch_get_irn_register(env, irn);
-
- ir_fprintf(f, "\n");
- if(reg)
- ir_fprintf(f, "%s = ", arch_register_get_name(reg));
-
- ir_fprintf(f, "%n(", irn);
-
- if(block != get_irg_start_block(get_irn_irg(block))) {
- for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
- ir_node *op = get_irn_n(irn, i);
- if(arch_is_register_operand(dump_env->env, op, -1)) {
- ir_fprintf(f, "%s%s", prefix,
- arch_register_get_name(arch_get_irn_register(env, op)));
- prefix = ", ";
- }
- }
- }
-
- ir_fprintf(f, ")");
- }
- ir_fprintf(f, "\"}\n");
-
- if(get_irg_start_block(get_irn_irg(block)) != block) {
- for(i = 0, n = get_irn_arity(block); i < n; ++i) {
- ir_node *pred_bl = get_nodes_block(get_irn_n(block, i));
- ir_fprintf(f, "edge:{sourcename:\"b%N\" targetname:\"b%N\"}\n", block, pred_bl);
- }
- }
-}
-
-void dump_allocated_irg(arch_env_t *arch_env, ir_graph *irg, char *suffix)
-{
- char buf[1024];
- struct dump_env env;
-
- env.env = arch_env;
-
- ir_snprintf(buf, sizeof(buf), "%F-alloc%s.vcg", irg, suffix);
-
- if((env.f = fopen(buf, "wt")) != NULL) {
- fprintf(env.f, "graph:{title:\"prg\"\n");
- irg_block_walk_graph(irg, dump_allocated_block, NULL, &env);
- fprintf(env.f, "}\n");
- fclose(env.f);
- }
-}
-
-static void localize_const_walker(ir_node *irn, void *data)
-{
- if(!is_Block(irn)) {
- int i, n;
-
- for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
- ir_node *op = get_irn_n(irn, i);
- if(get_irn_opcode(op) == iro_Const) {
- ir_node *tgt_block, *cnst;
-
- /* Special treatment for phi nodes, because phi-usage is different */
- tgt_block = get_nodes_block(irn);
- if(is_Phi(irn))
- tgt_block = get_nodes_block(get_irn_n(tgt_block, i));
-
- /*
- * We have to create the const node by ourselves, since the
- * firmcons implementation always places it in the start block.
- */
- cnst = new_ir_node(NULL, get_irn_irg(irn),
- tgt_block, op_Const, get_irn_mode(op), 0, NULL);
- cnst->attr.con.tv = get_Const_tarval(op);
- set_irn_n(irn, i, cnst);
- }
- }
- }
-}
-
-void localize_consts(ir_graph *irg)
+void be_clear_links(ir_graph *irg)
{
- irg_walk_graph(irg, localize_const_walker, NULL, NULL);
- dead_node_elimination(irg);
+ irg_walk_graph(irg, firm_clear_link, NULL, NULL);
}
/**
- * Edge hook to dump the schedule edges.
+ * Gets the Proj with number pn from irn.
*/
-static int sched_edge_hook(FILE *F, ir_node *irn)
+ir_node *be_get_Proj_for_pn(const ir_node *irn, long pn)
{
- if(sched_is_scheduled(irn) && sched_has_prev(irn)) {
- ir_node *prev = sched_prev(irn);
- fprintf(F, "edge:{sourcename:\"");
- PRINT_NODEID(irn);
- fprintf(F, "\" targetname:\"");
- PRINT_NODEID(prev);
- fprintf(F, "\" color:magenta}\n");
- }
- return 1;
-}
-
-void dump_ir_block_graph_sched(ir_graph *irg, const char *suffix) {
- DUMP_NODE_EDGE_FUNC old = get_dump_node_edge_hook();
+ ir_node *proj;
+ assert(get_irn_mode(irn) == mode_T && "need mode_T");
- dump_consts_local(0);
- set_dump_node_edge_hook(sched_edge_hook);
- dump_ir_block_graph(irg, suffix);
- set_dump_node_edge_hook(old);
-}
+ foreach_out_edge(irn, edge) {
+ proj = get_edge_src_irn(edge);
-void dump_ir_extblock_graph_sched(ir_graph *irg, const char *suffix) {
- DUMP_NODE_EDGE_FUNC old = get_dump_node_edge_hook();
+ if (is_Proj(proj) && get_Proj_proj(proj) == pn)
+ return proj;
+ }
- dump_consts_local(0);
- set_dump_node_edge_hook(sched_edge_hook);
- dump_ir_extblock_graph(irg, suffix);
- set_dump_node_edge_hook(old);
+ return NULL;
}
/**
- * Dumps a graph and numbers all dumps.
- * @param irg The graph
- * @param suffix A suffix to its file name.
- * @param dumper The dump function
+ * Block-walker: adds the visited block to a flexible array.
*/
-void be_dump(ir_graph *irg, const char *suffix, void (*dumper)(ir_graph *, const char *)) {
- static ir_graph *last_irg = NULL;
- static int nr = 0;
- char buf[128];
-
- if (irg != last_irg) {
- last_irg = irg;
- nr = 0;
- }
-
- snprintf(buf, sizeof(buf), "-%02d%s", nr++, suffix);
- buf[sizeof(buf) - 1] = '\0';
- dumper(irg, buf);
-}
-
-
-
-static void collect_phis(ir_node *irn, void *data)
-{
- if(is_Phi(irn)) {
- ir_node *bl = get_nodes_block(irn);
- set_irn_link(irn, get_irn_link(bl));
- set_irn_link(bl, irn);
- }
-}
-
-void be_clear_links(ir_graph *irg)
+static void add_to_postorder(ir_node *block, void *data)
{
- irg_walk_graph(irg, firm_clear_link, NULL, NULL);
+ ir_node ***list = (ir_node***) data;
+ ARR_APP1(ir_node*, *list, block);
}
-void be_collect_phis(ir_graph *irg)
+ir_node **be_get_cfgpostorder(ir_graph *irg)
{
- irg_walk_graph(irg, collect_phis, NULL, NULL);
-}
+ ir_node **list = NEW_ARR_F(ir_node*, 0);
+ ir_node *end_block = get_irg_end_block(irg);
-/* FIXME: not used. can be deleted? */
-ir_node *dom_up_search(pset *accept, ir_node *start_point_exclusive) {
- ir_node *irn, *idom;
+ /* end block may be unreachable in case of endless loops */
+ if (get_Block_n_cfgpreds(end_block) == 0)
+ ARR_APP1(ir_node*, list, end_block);
- /* search the current block */
- for (irn=sched_prev(start_point_exclusive); irn; irn=sched_prev(irn))
- if (pset_find_ptr(accept, irn))
- return irn;
+ /* walk blocks */
+ irg_block_edges_walk(get_irg_start_block(irg), NULL, add_to_postorder,
+ &list);
- /* FIXME: This is obviously buggy: after the first recursive call idom is a block
- and get_nodes_block will fail.
- Moreover, why not a simple iteration instead of recursion */
- idom = get_Block_idom(get_nodes_block(start_point_exclusive));
+ return list;
+}
- if (idom)
- return dom_up_search(accept, idom); /* continue search in idom-block */
- else
- return NULL; /* this was the start block and we did not find an acceptable irn */
+ir_node *get_first_block_succ(const ir_node *block)
+{
+ const ir_edge_t *edge = get_irn_out_edge_first_kind(block, EDGE_KIND_BLOCK);
+ assert(edge != NULL);
+ return get_edge_src_irn(edge);
}
projects / libfirm / blobdiff