+/*
+ * This file is part of libFirm.
+ * Copyright (C) 2012 University of Karlsruhe.
+ */
+
/**
- * Author: Daniel Grund
- * Date: 25.05.2005
- * Copyright: (c) Universitaet Karlsruhe
- * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
- *
- * Performs SSA-Destruction.
+ * @file
+ * @brief Performs SSA-Destruction.
+ * @author Daniel Grund
+ * @date 25.05.2005
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
+
+#include "bessadestr.h"
#include "debug.h"
#include "set.h"
#include "irnode_t.h"
#include "ircons_t.h"
#include "iredges_t.h"
+#include "irgwalk.h"
#include "irgmod.h"
#include "irdump.h"
#include "irprintf.h"
#include "bechordal_t.h"
#include "bearch.h"
#include "belive_t.h"
-#include "benode_t.h"
-#include "besched_t.h"
-
-static firm_dbg_module_t *dbg = NULL;
-#define DUMP_GRAPHS
-
-#define get_chordal_arch(ce) ((ce)->main_env->arch_env)
-#define get_reg(irn) arch_get_irn_register(get_chordal_arch(chordal_env), irn)
-#define set_reg(irn, reg) arch_set_irn_register(get_chordal_arch(chordal_env), irn, reg)
-
-#define is_Perm(irn) (arch_irn_classify(arch_env, irn) == arch_irn_class_perm)
-#define get_reg_cls(irn) (arch_get_irn_reg_class(arch_env, irn, -1))
-#define is_curr_reg_class(irn) (get_reg_cls(p) == chordal_env->cls)
-
-static void clear_link(ir_node *irn, void *data) {
+#include "benode.h"
+#include "besched.h"
+#include "statev_t.h"
+#include "beirg.h"
+#include "beintlive_t.h"
+#include "bespillutil.h"
+
+DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
+
+static void clear_link(ir_node *irn, void *data)
+{
+ (void) data;
set_irn_link(irn, NULL);
}
* - have the current register class
* The list is rooted at get_irn_link(BB).
*/
-static void collect_phis_walker(ir_node *irn, void *data) {
- be_chordal_env_t *env = data;
- if(is_Phi(irn) && chordal_has_class(env, irn)) {
+static void collect_phis_walker(ir_node *irn, void *data)
+{
+ be_chordal_env_t *env = (be_chordal_env_t*)data;
+ if (is_Phi(irn) && arch_irn_consider_in_reg_alloc(env->cls, irn)) {
ir_node *bl = get_nodes_block(irn);
set_irn_link(irn, get_irn_link(bl));
set_irn_link(bl, irn);
ir_node *proj; /**< The proj created for @p arg. */
} perm_proj_t;
-static int cmp_perm_proj(const void *a, const void *b, size_t n) {
- const perm_proj_t *p = a;
- const perm_proj_t *q = b;
+static int cmp_perm_proj(const void *a, const void *b, size_t n)
+{
+ const perm_proj_t *p = (const perm_proj_t*)a;
+ const perm_proj_t *q = (const perm_proj_t*)b;
+ (void) n;
+
return !(p->arg == q->arg);
}
/**
* Insert Perms in all predecessors of a block containing a phi
*/
-static void insert_all_perms_walker(ir_node *bl, void *data) {
- be_chordal_env_t *chordal_env = data;
- pmap *perm_map = chordal_env->data;
- ir_graph *irg = chordal_env->irg;
- const be_node_factory_t *fact = chordal_env->main_env->node_factory;
+static void insert_all_perms_walker(ir_node *bl, void *data)
+{
+ be_chordal_env_t *const chordal_env = (be_chordal_env_t*)data;
+ be_lv_t *lv = be_get_irg_liveness(chordal_env->irg);
int i, n;
assert(is_Block(bl));
/* If the link flag is NULL, this block has no phis. */
- if(!get_irn_link(bl))
+ if (!get_irn_link(bl))
return;
/* Look at all predecessors of the phi block */
- for(i = 0, n = get_irn_arity(bl); i < n; ++i) {
- ir_node *phi, *perm, *insert_after, **in;
- perm_proj_t *pp;
+ for (i = 0, n = get_irn_arity(bl); i < n; ++i) {
+ ir_node *phi, *perm, **in;
set *arg_set = new_set(cmp_perm_proj, chordal_env->cls->n_regs);
ir_node *pred_bl = get_Block_cfgpred_block(bl, i);
int n_projs = 0;
- assert(!pmap_contains(perm_map, pred_bl) && "Already permed that block");
-
/*
* Note that all phis in the list are in the same
* register class by construction.
*/
- for(phi = get_irn_link(bl); phi; phi = get_irn_link(phi)) {
- perm_proj_t templ;
- ir_node *arg = get_irn_n(phi, i);
- unsigned hash = HASH_PTR(arg);
+ for (phi = (ir_node*)get_irn_link(bl); phi != NULL;
+ phi = (ir_node*)get_irn_link(phi)) {
+ ir_node *arg = get_irn_n(phi, i);
+ unsigned hash;
+ perm_proj_t templ;
+ hash = hash_irn(arg);
templ.arg = arg;
- pp = set_find(arg_set, &templ, sizeof(templ), hash);
+ perm_proj_t *const pp = set_find(perm_proj_t, arg_set, &templ, sizeof(templ), hash);
/*
* If a proj_perm_t entry has not been made in the argument set,
* create one. The only restriction is, that the phi argument
* may not be live in at the current block, since this argument
* interferes with the phi and must thus not be member of a
- * Perm. A copy will be inserted for this argument alter on.
+ * Perm. A copy will be inserted for this argument later on.
*/
- if(!pp && !is_live_in(bl, arg)) {
+ if (!pp && !be_is_live_in(lv, bl, arg)) {
templ.pos = n_projs++;
- set_insert(arg_set, &templ, sizeof(templ), hash);
+ (void)set_insert(perm_proj_t, arg_set, &templ, sizeof(templ), hash);
}
}
* Create a new Perm with the arguments just collected
* above in the arg_set and insert it into the schedule.
*/
- in = malloc(n_projs * sizeof(in[0]));
- for(pp = set_first(arg_set); pp; pp = set_next(arg_set))
+ in = XMALLOCN(ir_node*, n_projs);
+ foreach_set(arg_set, perm_proj_t, pp) {
in[pp->pos] = pp->arg;
+ }
- perm = new_Perm(fact, chordal_env->cls, irg, pred_bl, n_projs, in);
- free(in);
- insert_after = sched_skip(sched_last(pred_bl), 0, sched_skip_cf_predicator, chordal_env->main_env->arch_env);
- sched_add_after(insert_after, perm);
+ perm = be_new_Perm(chordal_env->cls, pred_bl, n_projs, in);
+ stat_ev_int("phi_perm", n_projs);
+
+ ir_node *const schedpoint = be_get_end_of_block_insertion_point(pred_bl);
+ sched_add_before(schedpoint, perm);
/*
* Make the Projs for the Perm and insert into schedule.
* Register allocation is copied from the former phi
* arguments to the projs (new phi arguments).
*/
- insert_after = perm;
- for(pp = set_first(arg_set); pp; pp = set_next(arg_set)) {
- ir_node *proj = new_r_Proj(irg, pred_bl, perm, get_irn_mode(pp->arg), pp->pos);
+ foreach_set(arg_set, perm_proj_t, pp) {
+ ir_node *proj = new_r_Proj(perm, get_irn_mode(pp->arg), pp->pos);
pp->proj = proj;
- assert(get_reg(pp->arg));
- set_reg(proj, get_reg(pp->arg));
- sched_add_after(insert_after, proj);
- insert_after = proj;
- DBG((dbg, LEVEL_2, "Copy register assignment %s from %+F to %+F\n", get_reg(pp->arg)->name, pp->arg, pp->proj));
+ assert(arch_get_irn_register(pp->arg));
+ arch_set_irn_register(proj, arch_get_irn_register(pp->arg));
+ DBG((dbg, LEVEL_2, "Copy register assignment %s from %+F to %+F\n", arch_get_irn_register(pp->arg)->name, pp->arg, pp->proj));
}
/*
* Set the phi nodes to their new arguments: The Projs of the Perm
*/
- for(phi = get_irn_link(bl); phi; phi = get_irn_link(phi)) {
+ for (phi = (ir_node*)get_irn_link(bl); phi != NULL;
+ phi = (ir_node*)get_irn_link(phi)) {
perm_proj_t templ;
templ.arg = get_irn_n(phi, i);
- pp = set_find(arg_set, &templ, sizeof(templ), HASH_PTR(templ.arg));
+ perm_proj_t *const pp = set_find(perm_proj_t, arg_set, &templ, sizeof(templ), hash_irn(templ.arg));
/* If not found, it was an interfering argument */
- if (pp)
+ if (pp) {
set_irn_n(phi, i, pp->proj);
+ be_liveness_introduce(lv, pp->proj);
+ }
}
- /* register in perm map */
- pmap_insert(perm_map, pred_bl, perm);
+ /* update the liveness of the Perm's operands. It might be changed. */
+ {
+ int i;
+ for (i = 0; i < n_projs; ++i)
+ be_liveness_update(lv, in[i]);
+ }
+ free(in);
}
del_set(arg_set);
* Adjusts the register allocation for the (new) phi-operands
* and insert duplicates iff necessary.
*/
-static void set_regs_or_place_dupls_walker(ir_node *bl, void *data) {
- be_chordal_env_t *chordal_env = data;
+static void set_regs_or_place_dupls_walker(ir_node *bl, void *data)
+{
+ be_chordal_env_t *chordal_env = (be_chordal_env_t*)data;
+ be_lv_t *lv = be_get_irg_liveness(chordal_env->irg);
ir_node *phi;
/* Consider all phis of this block */
- for(phi = get_irn_link(bl); phi; phi = get_irn_link(phi)) {
- int i, max;
- ir_node *arg, *phi_block, *arg_block;
- const arch_register_t *phi_reg, *arg_reg;
- const arch_register_class_t *cls;
+ for (phi = (ir_node*)get_irn_link(bl); phi != NULL;
+ phi = (ir_node*)get_irn_link(phi)) {
+ ir_node *phi_block = get_nodes_block(phi);
+ const arch_register_t *phi_reg = arch_get_irn_register(phi);
+ int max;
+ int i;
assert(is_Phi(phi) && "Can only handle phi-destruction :)");
- phi_block = get_nodes_block(phi);
- phi_reg = get_reg(phi);
- cls = arch_get_irn_reg_class(get_chordal_arch(chordal_env), phi, -1);
-
/* process all arguments of the phi */
- for(i=0, max=get_irn_arity(phi); i<max; ++i) {
- arg = get_irn_n(phi, i);
+ for (i = 0, max = get_irn_arity(phi); i < max; ++i) {
+ ir_node *arg = get_irn_n(phi, i);
+ const arch_register_t *arg_reg;
+ ir_node *arg_block;
+
arg_block = get_Block_cfgpred_block(phi_block, i);
- arg_reg = get_reg(arg);
+ arg_reg = arch_get_irn_register(arg);
+
assert(arg_reg && "Register must be set while placing perms");
DBG((dbg, LEVEL_1, " for %+F(%s) -- %+F(%s)\n", phi, phi_reg->name, arg, arg_reg->name));
- if(nodes_interfere(chordal_env, phi, arg)) {
- /* Insert a duplicate in arguments block,
- * make it the new phi arg,
- * set its register,
- * insert it into schedule,
- * pin it
- */
- ir_node *dupl = new_Copy(chordal_env->main_env->node_factory, cls, chordal_env->irg, arg_block, arg);
- assert(get_irn_mode(phi) == get_irn_mode(dupl));
+ if (phi_reg == arg_reg
+ || (arg_reg->type & arch_register_type_virtual)) {
+ /* Phi and arg have the same register, so pin and continue */
+ pin_irn(arg, phi_block);
+ DBG((dbg, LEVEL_1, " arg has same reg: pin %+F(%s)\n", arg, arch_get_irn_register(arg)->name));
+ continue;
+ }
+
+ if (be_values_interfere(lv, phi, arg)) {
+ /*
+ Insert a duplicate in arguments block,
+ make it the new phi arg,
+ set its register,
+ insert it into schedule,
+ pin it
+ */
+ ir_node *dupl = be_new_Copy(arg_block, arg);
+
set_irn_n(phi, i, dupl);
- set_reg(dupl, phi_reg);
- sched_add_after(sched_skip(sched_last(arg_block), 0, sched_skip_cf_predicator, chordal_env->main_env->arch_env), dupl);
+ arch_set_irn_register(dupl, phi_reg);
+ ir_node *const schedpoint = be_get_end_of_block_insertion_point(arg_block);
+ sched_add_before(schedpoint, dupl);
pin_irn(dupl, phi_block);
- DBG((dbg, LEVEL_1, " they do interfere: insert %+F(%s)\n", dupl, get_reg(dupl)->name));
- } else {
- /*
- * First check if there is a phi
- * - in the same block
- * - having arg at the current pos in its arg-list
- * - having the same color as arg
- *
- * If found, then pin the arg
- */
- DBG((dbg, LEVEL_1, " they do not interfere\n"));
- assert(is_Proj(arg));
- if (!is_pinned(arg)) {
- ir_node *other_phi;
- DBG((dbg, LEVEL_1, " searching for phi with same arg having args register\n"));
- for(other_phi = get_irn_link(phi_block); other_phi; other_phi = get_irn_link(other_phi)) {
- assert(is_Phi(other_phi) && get_nodes_block(phi) == get_nodes_block(other_phi) && "link fields are screwed up");
- if (get_irn_n(other_phi, i) == arg && get_reg(other_phi) == arg_reg) {
- DBG((dbg, LEVEL_1, " found %+F(%s)\n", other_phi, get_reg(other_phi)->name));
- pin_irn(arg, phi_block);
- }
+ be_liveness_introduce(lv, dupl);
+ be_liveness_update(lv, arg);
+ DBG((dbg, LEVEL_1, " they do interfere: insert %+F(%s)\n", dupl, arch_get_irn_register(dupl)->name));
+ continue; /* with next argument */
+ }
+
+ DBG((dbg, LEVEL_1, " they do not interfere\n"));
+ assert(is_Proj(arg));
+ /*
+ First check if there is an other phi
+ - in the same block
+ - having arg at the current pos in its arg-list
+ - having the same color as arg
+
+ If found, then pin the arg (for that phi)
+ */
+ if (! is_pinned(arg)) {
+ ir_node *other_phi;
+
+ DBG((dbg, LEVEL_1, " searching for phi with same arg having args register\n"));
+
+ for (other_phi = (ir_node*)get_irn_link(phi_block);
+ other_phi != NULL;
+ other_phi = (ir_node*)get_irn_link(other_phi)) {
+
+ assert(is_Phi(other_phi) &&
+ get_nodes_block(phi) == get_nodes_block(other_phi) &&
+ "link fields are screwed up");
+
+ if (get_irn_n(other_phi, i) == arg && arch_get_irn_register(other_phi) == arg_reg) {
+ DBG((dbg, LEVEL_1, " found %+F(%s)\n", other_phi, arch_get_irn_register(other_phi)->name));
+ pin_irn(arg, phi_block);
+ break;
}
}
+ }
- if (is_pinned(arg)) {
- /* Insert a duplicate of the original value in arguments block,
- * make it the new phi arg,
- * set its register,
- * insert it into schedule,
- * pin it
- */
- ir_node *perm = get_Proj_pred(arg);
- ir_node *orig_val = get_irn_n(perm, get_Proj_proj(arg));
- ir_node *dupl = new_Copy(chordal_env->main_env->node_factory, cls, chordal_env->irg, arg_block, orig_val);
- assert(get_irn_mode(phi) == get_irn_mode(dupl));
- set_irn_n(phi, i, dupl);
- set_reg(dupl, phi_reg);
- sched_add_before(perm, dupl);
- pin_irn(dupl, phi_block);
- DBG((dbg, LEVEL_1, " arg is pinned: insert %+F(%s)\n", dupl, get_reg(dupl)->name));
- } else {
- /* No other phi has the same color (else arg would have been pinned),
- * so just set the register and pin
- */
- set_reg(arg, phi_reg);
- pin_irn(arg, phi_block);
- DBG((dbg, LEVEL_1, " arg is not pinned: so pin %+F(%s)\n", arg, get_reg(arg)->name));
- }
+ if (is_pinned(arg)) {
+ /*
+ Insert a duplicate of the original value in arguments block,
+ make it the new phi arg,
+ set its register,
+ insert it into schedule,
+ pin it
+ */
+ ir_node *perm = get_Proj_pred(arg);
+ ir_node *dupl = be_new_Copy(arg_block, arg);
+
+ set_irn_n(phi, i, dupl);
+ arch_set_irn_register(dupl, phi_reg);
+ sched_add_after(perm, dupl);
+ pin_irn(dupl, phi_block);
+ be_liveness_introduce(lv, dupl);
+ be_liveness_update(lv, arg);
+ DBG((dbg, LEVEL_1, " arg is pinned: insert %+F(%s)\n", dupl, arch_get_irn_register(dupl)->name));
+ } else {
+ /*
+ No other phi has the same color (else arg would have been pinned),
+ so just set the register and pin
+ */
+ arch_set_irn_register(arg, phi_reg);
+ pin_irn(arg, phi_block);
+ DBG((dbg, LEVEL_1, " arg is not pinned: so pin %+F(%s)\n", arg, arch_get_irn_register(arg)->name));
}
}
}
}
-void be_ssa_destruction(be_chordal_env_t *chordal_env) {
- pmap *perm_map = pmap_create();
+void be_ssa_destruction(be_chordal_env_t *chordal_env)
+{
ir_graph *irg = chordal_env->irg;
- dbg = firm_dbg_register("ir.be.ssadestr");
+ FIRM_DBG_REGISTER(dbg, "ir.be.ssadestr");
+
+ be_invalidate_live_sets(irg);
/* create a map for fast lookup of perms: block --> perm */
- chordal_env->data = perm_map;
irg_walk_graph(irg, clear_link, collect_phis_walker, chordal_env);
DBG((dbg, LEVEL_1, "Placing perms...\n"));
irg_block_walk_graph(irg, insert_all_perms_walker, NULL, chordal_env);
-#ifdef DUMP_GRAPHS
- dump_ir_block_graph_sched(irg, "-ssa_destr_perms_placed");
-#endif
+
+ if (chordal_env->opts->dump_flags & BE_CH_DUMP_SSADESTR)
+ dump_ir_graph(irg, "ssa_destr_perms_placed");
+
+ be_assure_live_chk(irg);
DBG((dbg, LEVEL_1, "Setting regs and placing dupls...\n"));
irg_block_walk_graph(irg, set_regs_or_place_dupls_walker, NULL, chordal_env);
-#ifdef DUMP_GRAPHS
- dump_ir_block_graph_sched(irg, "-ssa_destr_regs_set");
-#endif
- pmap_destroy(perm_map);
+ /* unfortunately updating doesn't work yet. */
+ be_invalidate_live_chk(irg);
+
+ if (chordal_env->opts->dump_flags & BE_CH_DUMP_SSADESTR)
+ dump_ir_graph(irg, "ssa_destr_regs_set");
}
-static void ssa_destruction_check_walker(ir_node *bl, void *data) {
- be_chordal_env_t *chordal_env = data;
+static void ssa_destruction_check_walker(ir_node *bl, void *data)
+{
ir_node *phi;
int i, max;
+ (void)data;
- for(phi = get_irn_link(bl); phi; phi = get_irn_link(phi)) {
+ for (phi = (ir_node*)get_irn_link(bl); phi != NULL;
+ phi = (ir_node*)get_irn_link(phi)) {
const arch_register_t *phi_reg, *arg_reg;
- phi_reg = get_reg(phi);
+ phi_reg = arch_get_irn_register(phi);
/* iterate over all args of phi */
- for(i=0, max=get_irn_arity(phi); i<max; ++i) {
- ir_node *arg = get_irn_n(phi, i);
- arg_reg = get_reg(arg);
- if(phi_reg != arg_reg) {
+ for (i = 0, max = get_irn_arity(phi); i < max; ++i) {
+ ir_node *arg = get_irn_n(phi, i);
+ const arch_register_req_t *req = arch_get_irn_register_req(arg);
+ if (arch_register_req_is(req, ignore))
+ continue;
+
+ arg_reg = arch_get_irn_register(arg);
+
+ if (phi_reg != arg_reg) {
DBG((dbg, 0, "Error: Registers of %+F and %+F differ: %s %s\n", phi, arg, phi_reg->name, arg_reg->name));
assert(0);
}
- if(!is_pinned(arg)) {
+
+ if (! is_pinned(arg)) {
DBG((dbg, 0, "Warning: Phi argument %+F is not pinned.\n", arg));
assert(0);
}
}
}
-void be_ssa_destruction_check(be_chordal_env_t *chordal_env) {
- irg_block_walk_graph(chordal_env->irg, ssa_destruction_check_walker, NULL, chordal_env);
+void be_ssa_destruction_check(be_chordal_env_t *chordal_env)
+{
+ irg_block_walk_graph(chordal_env->irg, ssa_destruction_check_walker, NULL, NULL);
}
projects / libfirm / blobdiff