/*
- * Author: Matthias Braun
- * Date: 26.7.06
- * Copyright: (c) Universitaet 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.
+ */
+
+/**
+ * @file
+ * @brief Spillslot coalescer.
+ * @author Matthias Braun
+ * @date 26.07.2006
+ * @version $Id$
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#include <stdlib.h>
#include "set.h"
-
+#include "array.h"
#include "irgwalk.h"
#include "ircons.h"
#include "irprintf.h"
#include "execfreq.h"
#include "unionfind.h"
-#include "type.h"
#include "irdump_t.h"
#include "benode_t.h"
#include "bespillslots.h"
#include "bechordal_t.h"
#include "bejavacoal.h"
-
+#include "bestatevent.h"
+#include "bespilloptions.h"
+#include "bemodule.h"
+#include "beintlive_t.h"
+#include "beirg_t.h"
+#include "bearch_t.h"
#define DBG_COALESCING 1
#define DBG_INTERFERENCES 2
-DEBUG_ONLY(
-static firm_dbg_module_t *dbg = NULL;
-)
+DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
typedef struct _spill_t {
ir_node *spill;
- /** regclass of the spilled value */
- const arch_register_class_t *cls;
- /** index into spillslot_unionfind unionfind structure */
- int spillslot;
+ const ir_mode *mode; /**< mode of the spilled value */
+ int alignment; /**< alignment for the spilled value */
+ int spillslot; /**< index into spillslot_unionfind structure */
} spill_t;
typedef struct _affinity_edge_t {
int slot1, slot2;
} affinity_edge_t;
-typedef struct _ss_env_t {
+struct _be_fec_env_t {
struct obstack obst;
- const be_chordal_env_t *chordal_env;
+ const arch_env_t *arch_env;
+ be_irg_t *birg;
set *spills;
ir_node **reloads;
affinity_edge_t **affinity_edges;
set *memperms;
-} ss_env_t;
+};
/** Compare 2 affinity edges (used in quicksort) */
-static int cmp_affinity(const void *d1, const void *d2) {
- const affinity_edge_t *e1 = d1;
- const affinity_edge_t *e2 = d2;
+static int cmp_affinity(const void *d1, const void *d2)
+{
+ const affinity_edge_t * const *e1 = d1;
+ const affinity_edge_t * const *e2 = d2;
- return e1->affinity < e2->affinity ? -1 : 1;
+ /* sort in descending order */
+ return (*e1)->affinity < (*e2)->affinity ? 1 : -1;
}
-static int cmp_spill(const void* d1, const void* d2, size_t size) {
+static int cmp_spill(const void* d1, const void* d2, size_t size)
+{
const spill_t* s1 = d1;
const spill_t* s2 = d2;
+ (void) size;
+
return s1->spill != s2->spill;
}
-static spill_t *get_spill(ss_env_t *env, ir_node *node) {
+static spill_t *get_spill(be_fec_env_t *env, ir_node *node)
+{
spill_t spill, *res;
- int hash = HASH_PTR(node);
+ int hash = hash_irn(node);
spill.spill = node;
res = set_find(env->spills, &spill, sizeof(spill), hash);
return res;
}
-/*
- * ____ _ _ _ ____ _ _ _
- * / ___|___ | | | ___ ___| |_ / ___| _ __ (_) | |___
- * | | / _ \| | |/ _ \/ __| __| \___ \| '_ \| | | / __|
- * | |__| (_) | | | __/ (__| |_ ___) | |_) | | | \__ \
- * \____\___/|_|_|\___|\___|\__| |____/| .__/|_|_|_|___/
- * |_|
- */
-static spill_t *collect_spill(ss_env_t *env, ir_node *node, const arch_register_class_t *cls) {
- spill_t spill, *res;
- int hash = HASH_PTR(node);
+static INLINE ir_node *get_memory_edge(const ir_node *node)
+{
+ int i, arity;
+
+ arity = get_irn_arity(node);
+ for(i = arity - 1; i >= 0; --i) {
+ ir_node *arg = get_irn_n(node, i);
+ if(get_irn_mode(arg) == mode_M)
+ return arg;
+ }
+
+ return NULL;
+}
- assert(be_is_Spill(node));
+static spill_t *collect_spill(be_fec_env_t *env, ir_node *node,
+ const ir_mode *mode, int align)
+{
+ spill_t spill, *res;
+ int hash = hash_irn(node);
+ /* insert into set of spills if not already there */
spill.spill = node;
- res = set_find(env->spills, &spill, sizeof(spill), hash);
+ res = set_find(env->spills, &spill, sizeof(spill), hash);
if(res == NULL) {
spill.spillslot = set_count(env->spills);
- spill.cls = cls;
- res = set_insert(env->spills, &spill, sizeof(spill), hash);
+ spill.mode = mode;
+ spill.alignment = align;
+ res = set_insert(env->spills, &spill, sizeof(spill), hash);
} else {
- assert(cls == res->cls);
+ assert(res->mode == mode);
+ assert(res->alignment == align);
}
return res;
}
-static spill_t *collect_memphi(ss_env_t *env, ir_node *node, const arch_register_class_t *cls) {
+static spill_t *collect_memphi(be_fec_env_t *env, ir_node *node,
+ const ir_mode *mode, int align)
+{
int i, arity;
spill_t spill, *res;
- int hash = HASH_PTR(node);
+ int hash = hash_irn(node);
+ const ir_exec_freq *exec_freq = be_get_birg_exec_freq(env->birg);
assert(is_Phi(node));
spill.spill = node;
res = set_find(env->spills, &spill, sizeof(spill), hash);
if(res != NULL) {
+ assert(res->mode == mode);
+ assert(res->alignment == align);
return res;
}
spill.spillslot = set_count(env->spills);
- spill.cls = cls;
- res = set_insert(env->spills, &spill, sizeof(spill), hash);
+ spill.mode = mode;
+ spill.alignment = align;
+ res = set_insert(env->spills, &spill, sizeof(spill), hash);
- // is 1 of the arguments a spill?
- for(i = 0, arity = get_irn_arity(node); i < arity; ++i) {
+ /* collect attached spills and mem-phis */
+ arity = get_irn_arity(node);
+ for(i = 0; i < arity; ++i) {
affinity_edge_t *affinty_edge;
- ir_node* arg = get_irn_n(node, i);
- spill_t* arg_spill;
+ ir_node *arg = get_irn_n(node, i);
+ spill_t *arg_spill;
- if(be_is_Spill(arg)) {
- arg_spill = collect_spill(env, arg, cls);
+ if(is_Phi(arg)) {
+ arg_spill = collect_memphi(env, arg, mode, align);
} else {
- // if it wasn't a spill then it must be a Mem-Phi
- assert(is_Phi(arg));
- arg_spill = collect_memphi(env, arg, cls);
+ arg_spill = collect_spill(env, arg, mode, align);
}
- // add an affinity edge
- affinty_edge = obstack_alloc(&env->obst, sizeof(affinty_edge[0]));
- affinty_edge->affinity = get_block_execfreq(env->chordal_env->exec_freq, get_nodes_block(arg));
- affinty_edge->slot1 = res->spillslot;
- affinty_edge->slot2 = arg_spill->spillslot;
+ /* add an affinity edge */
+ affinty_edge = obstack_alloc(&env->obst, sizeof(affinty_edge[0]));
+ affinty_edge->affinity = get_block_execfreq(exec_freq, get_nodes_block(arg));
+ affinty_edge->slot1 = res->spillslot;
+ affinty_edge->slot2 = arg_spill->spillslot;
ARR_APP1(affinity_edge_t*, env->affinity_edges, affinty_edge);
}
return res;
}
-/**
- * This walker function searches for reloads and collects all the spills
- * and memphis attached to them.
- */
-static void collect_spills_walker(ir_node *node, void *data) {
- ss_env_t *env = data;
+void be_node_needs_frame_entity(be_fec_env_t *env, ir_node *node,
+ const ir_mode *mode, int align)
+{
+ ir_node *spillnode = get_memory_edge(node);
+ spill_t *spill;
- if(be_is_Reload(node)) {
- ir_node *spill = get_irn_n(node, be_pos_Reload_mem);
- const arch_env_t *arch_env = env->chordal_env->birg->main_env->arch_env;
- const arch_register_class_t *cls = arch_get_irn_reg_class(arch_env, node, -1);
+ assert(spillnode != NULL);
- if(is_Phi(spill)) {
- collect_memphi(env, spill, cls);
- } else {
- collect_spill(env, spill, cls);
- }
- ARR_APP1(ir_node*, env->reloads, node);
+ /* walk upwards and collect all phis and spills on this way */
+ if (is_Phi(spillnode)) {
+ spill = collect_memphi(env, spillnode, mode, align);
+ } else {
+ spill = collect_spill(env, spillnode, mode, align);
}
+
+ ARR_APP1(ir_node *, env->reloads, node);
}
-/*
- * ____ _ ____ _ _
- * / ___|___ __ _| | ___ ___ ___ ___ / ___|| | ___ | |_ ___
- * | | / _ \ / _` | |/ _ \/ __|/ __/ _ \ \___ \| |/ _ \| __/ __|
- * | |__| (_) | (_| | | __/\__ \ (_| __/ ___) | | (_) | |_\__ \
- * \____\___/ \__,_|_|\___||___/\___\___| |____/|_|\___/ \__|___/
- */
-static int merge_interferences(ss_env_t *env, bitset_t** interferences, int* spillslot_unionfind, int s1, int s2)
+
+static int merge_interferences(be_fec_env_t *env, bitset_t** interferences,
+ int* spillslot_unionfind, int s1, int s2)
{
int res;
int i;
int spillcount;
- // merge spillslots and interferences
+ /* merge spillslots and interferences */
res = uf_union(spillslot_unionfind, s1, s2);
- // we assume that we always merge s2 to s1 so swap s1, s2 if necessary
+ /* we assume that we always merge s2 to s1 so swap s1, s2 if necessary */
if(res != 0) {
int t = s1;
s1 = s2;
bitset_or(interferences[s1], interferences[s2]);
- // update other interferences
+ /* update other interferences */
spillcount = set_count(env->spills);
for(i = 0; i < spillcount; ++i) {
bitset_t *intfs = interferences[i];
return res;
}
-#if 0
-
-static void dump_interference_graph(ss_env_t *env, bitset_t **interferences, const char* suffix) {
- char name[256];
- int i;
- int spillcount;
- spill_t *spill;
- FILE *f;
- static int cnt = 0;
-
- snprintf(name, sizeof(name), "%d-%s-spillslots-%s.vcg", cnt++, get_irg_dump_name(env->chordal_env->birg->irg), suffix);
-
- f = fopen(name, "w");
- assert(f != NULL);
-
- fprintf(f, "graph: {\n");
-
- spillcount = set_count(env->spills);
- for(spill = set_first(env->spills), i = 0; spill != NULL; spill = set_next(env->spills), ++i) {
- int slotid = spill->spillslot;
- fprintf(f, "\tnode: { title: \"n%d\" label: \"%d\" }\n", i, slotid);
- }
-
- for(i = 0; i < ARR_LEN(env->affinity_edges); ++i) {
- affinity_edge_t *edge = env->affinity_edges[i];
- fprintf(f, "\tedge: { sourcename: \"n%d\" targetname: \"n%d\" color: green }\n", edge->slot1, edge->slot2);
- }
-
- for(i = 0; i < spillcount; ++i) {
- int i2;
- for(i2 = 0; i2 < spillcount; ++i2) {
- if(bitset_is_set(interferences[i], i2)) {
- fprintf(f, "\tedge: { sourcename: \"n%d\" targetname: \"n%d\" color: red }\n", i, i2);
+static int my_values_interfere2(be_irg_t *birg, const ir_node *a,
+ const ir_node *b)
+{
+ be_lv_t *lv = be_get_birg_liveness(birg);
+
+ int a2b = _value_dominates(a, b);
+ int b2a = _value_dominates(b, a);
+
+ /* If there is no dominance relation, they do not interfere. */
+ if((a2b | b2a) > 0) {
+ const ir_edge_t *edge;
+ ir_node *bb;
+
+ /*
+ * Adjust a and b so, that a dominates b if
+ * a dominates b or vice versa.
+ */
+ if(b2a) {
+ const ir_node *t = a;
+ a = b;
+ b = t;
+ }
+
+ bb = get_nodes_block(b);
+
+ /*
+ * If a is live end in b's block it is
+ * live at b's definition (a dominates b)
+ */
+ if(be_is_live_end(lv, bb, a))
+ return 1;
+
+ /*
+ * Look at all usages of a.
+ * If there's one usage of a in the block of b, then
+ * we check, if this use is dominated by b, if that's true
+ * a and b interfere. Note that b must strictly dominate the user,
+ * since if b is the last user of in the block, b and a do not
+ * interfere.
+ * Uses of a not in b's block can be disobeyed, because the
+ * check for a being live at the end of b's block is already
+ * performed.
+ */
+ foreach_out_edge(a, edge) {
+ const ir_node *user = get_edge_src_irn(edge);
+ if(is_Sync(user)) {
+ const ir_edge_t *edge2;
+ foreach_out_edge(user, edge2) {
+ const ir_node *user2 = get_edge_src_irn(edge2);
+ assert(!is_Sync(user2));
+ if(get_nodes_block(user2) == bb && !is_Phi(user2) &&
+ _value_strictly_dominates(b, user2))
+ return 1;
+ }
+ } else {
+ if(get_nodes_block(user) == bb && !is_Phi(user) &&
+ _value_strictly_dominates(b, user))
+ return 1;
}
- }
- }
+ }
+ }
- fprintf(f, "}\n");
- fclose(f);
+ return 0;
}
-static void show_stats(ss_env_t *env) {
- int spillcount;
- int slotcount;
- int *slotused;
- spill_t *spill;
-
- spillcount = set_count(env->spills);
- fprintf(stderr, "%s: Collected %d spills\n", get_irg_dump_name(env->chordal_env->birg->irg), spillcount);
-
- slotused = alloca(spillcount * sizeof(slotused[0]));
- memset(slotused, 0, spillcount * sizeof(slotused[0]));
-
- slotcount = 0;
- for(spill = set_first(env->spills); spill != NULL; spill = set_next(env->spills)) {
- int slot = spill->spillslot;
- if(slotused[slot] == 0) {
- slotused[slot] = 1;
- slotcount++;
+/**
+ * same as values_interfere but with special handling for Syncs
+ */
+static int my_values_interfere(be_irg_t *birg, ir_node *a, ir_node *b)
+{
+ if(is_Sync(a)) {
+ int i, arity = get_irn_arity(a);
+ for(i = 0; i < arity; ++i) {
+ ir_node *in = get_irn_n(a, i);
+ if(my_values_interfere(birg, in, b))
+ return 1;
}
+ return 0;
+ } else if(is_Sync(b)) {
+ int i, arity = get_irn_arity(b);
+ for(i = 0; i < arity; ++i) {
+ ir_node *in = get_irn_n(b, i);
+ /* a is not a sync, so no need for my_values_interfere */
+ if(my_values_interfere2(birg, a, in))
+ return 1;
+ }
+ return 0;
}
- fprintf(stderr, "%s: Coalesced to %d spillslots\n", get_irg_dump_name(env->chordal_env->birg->irg), slotcount);
+ return my_values_interfere2(birg, a, b);
}
-#endif
-
-static void assign_spillslots(ss_env_t *env);
-
/**
* A greedy coalescing algorithm for spillslots:
* 1. Sort the list of affinity edges
* 2. Try to merge slots with affinity edges (most expensive slots first)
* 3. Try to merge everything else that is possible
*/
-static void do_greedy_coalescing(ss_env_t *env)
+static void do_greedy_coalescing(be_fec_env_t *env)
{
int spillcount;
spill_t **spilllist;
DBG((dbg, DBG_COALESCING, "Coalescing %d spillslots\n", spillcount));
- interferences = alloca(spillcount * sizeof(interferences[0]));
+ interferences = alloca(spillcount * sizeof(interferences[0]));
spillslot_unionfind = alloca(spillcount * sizeof(spillslot_unionfind[0]));
- spilllist = alloca(spillcount * sizeof(spilllist[0]));
+ spilllist = alloca(spillcount * sizeof(spilllist[0]));
uf_init(spillslot_unionfind, 0, spillcount);
memset(spilllist, 0, spillcount * sizeof(spilllist[0]));
);
- for(spill = set_first(env->spills), i = 0; spill != NULL; spill = set_next(env->spills), ++i) {
+ for(spill = set_first(env->spills), i = 0; spill != NULL;
+ spill = set_next(env->spills), ++i) {
assert(spill->spillslot < spillcount);
spilllist[spill->spillslot] = spill;
}
interferences[i] = bitset_alloca(spillcount);
}
- // construct interferences
- for(i = 0; i < spillcount; ++i) {
+ /* construct interferences */
+ for (i = 0; i < spillcount; ++i) {
+ ir_node *spill1 = spilllist[i]->spill;
+
+ if (is_NoMem(spill1))
+ continue;
+
for(i2 = i+1; i2 < spillcount; ++i2) {
- if(values_interfere(env->chordal_env->lv, spilllist[i]->spill, spilllist[i2]->spill)) {
- DBG((dbg, DBG_INTERFERENCES, "Slot %d and %d interfere\n", i, i2));
+ ir_node *spill2 = spilllist[i2]->spill;
+
+ if (is_NoMem(spill2))
+ continue;
+
+ if (my_values_interfere(env->birg, spill1, spill2)) {
+ DBG((dbg, DBG_INTERFERENCES,
+ "Slot %d and %d interfere\n", i, i2));
+
bitset_set(interferences[i], i2);
bitset_set(interferences[i2], i);
}
}
}
- // sort affinity edges
+ /* sort affinity edges */
affinity_edge_count = ARR_LEN(env->affinity_edges);
- qsort(env->affinity_edges, affinity_edge_count, sizeof(env->affinity_edges[0]), cmp_affinity);
+ qsort(env->affinity_edges, affinity_edge_count,
+ sizeof(env->affinity_edges[0]), cmp_affinity);
- //dump_interference_graph(env, interferences, "before");
+ /*dump_interference_graph(env, interferences, "before"); */
- // try to merge affine nodes
+ /* try to merge affine nodes */
for(i = 0; i < affinity_edge_count; ++i) {
const affinity_edge_t *edge = env->affinity_edges[i];
int s1 = uf_find(spillslot_unionfind, edge->slot1);
int s2 = uf_find(spillslot_unionfind, edge->slot2);
/* test if values interfere */
- if(bitset_is_set(interferences[s1], s2)) {
+ if (bitset_is_set(interferences[s1], s2)) {
assert(bitset_is_set(interferences[s2], s1));
continue;
}
- DBG((dbg, DBG_COALESCING, "Merging %d and %d because of affinity edge\n", s1, s2));
+ DBG((dbg, DBG_COALESCING,
+ "Merging %d and %d because of affinity edge\n", s1, s2));
merge_interferences(env, interferences, spillslot_unionfind, s1, s2);
}
- // try to merge as much remaining spillslots as possible
+ /* try to merge as much remaining spillslots as possible */
for(i = 0; i < spillcount; ++i) {
int s1 = uf_find(spillslot_unionfind, i);
if(s1 != i)
continue;
}
- DBG((dbg, DBG_COALESCING, "Merging %d and %d because it is possible\n", s1, s2));
+ DBG((dbg, DBG_COALESCING,
+ "Merging %d and %d because it is possible\n", s1, s2));
if(merge_interferences(env, interferences, spillslot_unionfind, s1, s2) != 0) {
- // we can break the loop here, because s2 is the new supernode now
- // and we'll test s2 again later anyway
+ /* we can break the loop here, because s2 is the new supernode
+ * now and we'll test s2 again later anyway */
break;
}
}
}
- // assign spillslots
+ /* assign spillslots to spills */
for(i = 0; i < spillcount; ++i) {
spill_t *spill = spilllist[i];
spill->spillslot = uf_find(spillslot_unionfind, i);
}
- //dump_interference_graph(env, interferences, "after");
+ /*dump_interference_graph(env, interferences, "after");*/
}
-#if 0
-static void do_java_coalescing(ss_env_t *env)
-{
- int spillcount;
- spill_t **spilllist;
- spill_t *spill;
- int i, i2;
- be_java_coal_t *coal;
-
- spillcount = set_count(env->spills);
- if(spillcount == 0)
- return;
-
- spilllist = alloca(spillcount * sizeof(spilllist[0]));
-
- DEBUG_ONLY(
- memset(spilllist, 0, spillcount * sizeof(spilllist[0]));
- );
-
- coal = be_java_coal_init("spillslot coalescing", spillcount, spillcount, 1);
-
- for(spill = set_first(env->spills), i = 0; spill != NULL; spill = set_next(env->spills), ++i) {
- assert(spill->spillslot < spillcount);
- DEBUG_ONLY(assert(spilllist[spill->spillslot] == NULL));
- spilllist[spill->spillslot] = spill;
-
- be_java_coal_set_color(coal, spill->spillslot, spill->spillslot);
- }
- // construct interferences
- for(i = 0; i < spillcount; ++i) {
- for(i2 = i+1; i2 < spillcount; ++i2) {
- if(values_interfere(env->chordal_env->lv, spilllist[i]->spill, spilllist[i2]->spill)) {
- be_java_coal_add_int_edge(coal, i, i2);
- }
- }
- }
-
- for(i = 0; i < ARR_LEN(env->affinity_edges); ++i) {
- const affinity_edge_t *edge = env->affinity_edges[i];
- int n = edge->slot1;
- int m = edge->slot2;
- int costs = (int) (edge->affinity * 10000);
- be_java_coal_add_aff_edge(coal, n, m, costs);
- }
-
- be_java_coal_coalesce(coal);
-
- // construct spillslots
- for(i = 0; i < spillcount; ++i) {
- spill_t *spill = spilllist[i];
- spill->spillslot = be_java_coal_get_color(coal, i);
- }
- be_java_coal_destroy(coal);
-}
-#endif
-
-/*
- * _ _ _____ _ _ _ _
- * / \ ___ ___(_) __ _ _ __ | ____|_ __ | |_(_) |_(_) ___ ___
- * / _ \ / __/ __| |/ _` | '_ \ | _| | '_ \| __| | __| |/ _ \/ __|
- * / ___ \\__ \__ \ | (_| | | | | | |___| | | | |_| | |_| | __/\__ \
- * /_/ \_\___/___/_|\__, |_| |_| |_____|_| |_|\__|_|\__|_|\___||___/
- * |___/
- */
typedef struct _spill_slot_t {
int size;
int align;
- entity *entity;
+ ir_entity *entity;
} spill_slot_t;
typedef struct _memperm_entry_t {
ir_node* node;
int pos;
- entity *in;
- entity *out;
+ ir_entity *in;
+ ir_entity *out;
struct _memperm_entry_t *next;
} memperm_entry_t;
memperm_entry_t *entries;
} memperm_t;
-static int cmp_memperm(const void* d1, const void* d2, size_t size) {
+static int cmp_memperm(const void* d1, const void* d2, size_t size)
+{
const memperm_t* e1 = d1;
const memperm_t* e2 = d2;
+ (void) size;
+
return e1->block != e2->block;
}
-static memperm_t *get_memperm(ss_env_t *env, ir_node *block) {
+static memperm_t *get_memperm(be_fec_env_t *env, ir_node *block)
+{
memperm_t entry, *res;
int hash;
entry.block = block;
- hash = HASH_PTR(block);
+ hash = hash_irn(block);
res = set_find(env->memperms, &entry, sizeof(entry), hash);
return res;
}
-static entity* create_stack_entity(ss_env_t *env, spill_slot_t *slot) {
- ir_type* frame = get_irg_frame_type(env->chordal_env->irg);
- entity* res = frame_alloc_area(frame, slot->size, slot->align, 0);
+static ir_entity* create_stack_entity(be_fec_env_t *env, spill_slot_t *slot)
+{
+ ir_graph *irg = be_get_birg_irg(env->birg);
+ ir_type *frame = get_irg_frame_type(irg);
+ ir_entity *res = frame_alloc_area(frame, slot->size, slot->align, 0);
+
+ /* adjust size of the entity type... */
+ ir_type *enttype = get_entity_type(res);
+ set_type_size_bytes(enttype, slot->size);
slot->entity = res;
return res;
}
-static int get_spillslotsize_for_spill(ss_env_t *env, spill_t *spill) {
- const ir_mode *mode = arch_register_class_mode(spill->cls);
-
- return get_mode_size_bytes(mode);
-}
-
-static int get_spillslotalign_for_spill(ss_env_t *env, spill_t *spill) {
- const arch_isa_t *isa = env->chordal_env->birg->main_env->arch_env->isa;
-
- return arch_isa_get_reg_class_alignment(isa, spill->cls);
-}
-
/**
* Enlarges a spillslot (if necessary) so that it can carry a value of size
* @p othersize and alignment @p otheralign.
*/
-static void enlarge_spillslot(spill_slot_t *slot, int otheralign, int othersize) {
+static void enlarge_spillslot(spill_slot_t *slot, int otheralign, int othersize)
+{
if(othersize > slot->size) {
slot->size = othersize;
}
}
}
+
+static void assign_spill_entity(const arch_env_t *arch_env, ir_node *node,
+ ir_entity *entity)
+{
+ if(is_NoMem(node))
+ return;
+ if(is_Sync(node)) {
+ int i, arity;
+
+ arity = get_irn_arity(node);
+ for(i = 0; i < arity; ++i) {
+ ir_node *in = get_irn_n(node, i);
+ assert(!is_Phi(in));
+
+ assign_spill_entity(arch_env, in, entity);
+ }
+ return;
+ }
+
+ /* beware: we might have Stores with Memory Proj's, ia32 fisttp for instance */
+ node = skip_Proj(node);
+ assert(arch_get_frame_entity(arch_env, node) == NULL);
+ arch_set_frame_entity(arch_env, node, entity);
+}
+
/**
* Create stack entities for the spillslots and assign them to the spill and
* reload nodes.
*/
-static void assign_spillslots(ss_env_t *env) {
+static void assign_spillslots(be_fec_env_t *env)
+{
+ const arch_env_t *arch_env = env->arch_env;
int i;
int spillcount;
spill_t *spill;
memset(spillslots, 0, spillcount * sizeof(spillslots[0]));
- // construct spillslots
- for(spill = set_first(env->spills); spill != NULL; spill = set_next(env->spills)) {
+ /* construct spillslots */
+ for(spill = set_first(env->spills); spill != NULL;
+ spill = set_next(env->spills)) {
+
int slotid = spill->spillslot;
+ const ir_mode *mode = spill->mode;
spill_slot_t *slot = & (spillslots[slotid]);
- int align = get_spillslotalign_for_spill(env, spill);
- int size = get_spillslotsize_for_spill(env, spill);
+ int size = get_mode_size_bytes(mode);
+ int align = spill->alignment;
if(slot->align == 0 && slot->size == 0) {
slot->align = align;
}
}
- for(spill = set_first(env->spills); spill != NULL; spill = set_next(env->spills)) {
+ for(spill = set_first(env->spills); spill != NULL;
+ spill = set_next(env->spills)) {
+
+ ir_node *node = spill->spill;
+ int slotid = spill->spillslot;
spill_slot_t *slot;
- ir_node *node = spill->spill;
- int slotid = spill->spillslot;
slot = &spillslots[slotid];
if(slot->entity == NULL) {
create_stack_entity(env, slot);
}
- if(be_is_Spill(node)) {
- be_set_frame_entity(node, slot->entity);
- } else {
+ if(is_Phi(node)) {
int i, arity;
+ ir_node *block = get_nodes_block(node);
- // should be a PhiM
+ /* should be a PhiM */
assert(is_Phi(node));
for(i = 0, arity = get_irn_arity(node); i < arity; ++i) {
ir_node *arg = get_irn_n(node, i);
+ ir_node *predblock = get_Block_cfgpred_block(block, i);
spill_t *argspill;
int argslotid;
create_stack_entity(env, argslot);
}
- memperm = get_memperm(env, get_nodes_block(arg));
+ memperm = get_memperm(env, predblock);
entry = obstack_alloc(&env->obst, sizeof(entry[0]));
entry->node = node;
memperm->entries = entry;
}
}
+ } else {
+ assign_spill_entity(arch_env, node, slot->entity);
}
}
for(i = 0; i < ARR_LEN(env->reloads); ++i) {
- const ir_node* reload = env->reloads[i];
- ir_node* spillnode = get_irn_n(reload, be_pos_Reload_mem);
- spill_t *spill = get_spill(env, spillnode);
- const spill_slot_t *slot = & spillslots[spill->spillslot];
+ ir_node *reload = env->reloads[i];
+ ir_node *spillnode = get_memory_edge(reload);
+ spill_t *spill = get_spill(env, spillnode);
+ const spill_slot_t *slot = & spillslots[spill->spillslot];
assert(slot->entity != NULL);
- be_set_frame_entity(reload, slot->entity);
+ arch_set_frame_entity(arch_env, reload, slot->entity);
}
}
return ins;
}
-static void create_memperms(ss_env_t *env) {
+static void create_memperms(be_fec_env_t *env)
+{
+ const arch_env_t *arch_env = env->arch_env;
+ ir_graph *irg = be_get_birg_irg(env->birg);
memperm_t *memperm;
for(memperm = set_first(env->memperms); memperm != NULL; memperm = set_next(env->memperms)) {
nodes[i] = arg;
}
- mempermnode = be_new_MemPerm(env->chordal_env->birg->main_env->arch_env, env->chordal_env->irg, memperm->block,
- memperm->entrycount, nodes);
+ mempermnode = be_new_MemPerm(arch_env, irg, memperm->block,
+ memperm->entrycount, nodes);
- // insert node into schedule
+ /* insert node into schedule */
blockend = get_end_of_block_insertion_point(memperm->block);
- sched_add_after(blockend, mempermnode);
+ sched_add_before(blockend, mempermnode);
+ stat_ev_dbl("mem_perm", memperm->entrycount);
- for(entry = memperm->entries, i = 0; entry != NULL; entry = entry->next, ++i) {
+ i = 0;
+ for(entry = memperm->entries; entry != NULL; entry = entry->next, ++i) {
ir_node *proj;
ir_node* arg = get_irn_n(entry->node, entry->pos);
be_set_MemPerm_in_entity(mempermnode, i, entry->in);
be_set_MemPerm_out_entity(mempermnode, i, entry->out);
- set_irg_current_block(env->chordal_env->irg, memperm->block);
+ set_irg_current_block(irg, memperm->block);
proj = new_Proj(mempermnode, get_irn_mode(arg), i);
- sched_add_after(blockend, proj);
set_irn_n(entry->node, entry->pos, proj);
}
}
}
-void be_coalesce_spillslots(const be_chordal_env_t *chordal_env) {
- ss_env_t env;
+static int count_spillslots(const be_fec_env_t *env)
+{
+ const spill_t *spill;
+ int spillcount = set_count(env->spills);
+ bitset_t *counted = bitset_alloca(spillcount);
+ int slotcount;
- obstack_init(&env.obst);
- env.chordal_env = chordal_env;
- env.spills = new_set(cmp_spill, 10);
- env.reloads = NEW_ARR_F(ir_node*, 0);
- env.affinity_edges = NEW_ARR_F(affinity_edge_t*, 0);
- env.memperms = new_set(cmp_memperm, 10);
- FIRM_DBG_REGISTER(dbg, "firm.be.spillslots");
- //firm_dbg_set_mask(dbg, DBG_COALESCING);
+ slotcount = 0;
+ for(spill = set_first(env->spills); spill != NULL;
+ spill = set_next(env->spills)) {
+ int spillslot = spill->spillslot;
+ if(!bitset_is_set(counted, spillslot)) {
+ slotcount++;
+ bitset_set(counted, spillslot);
+ }
+ }
+
+ return slotcount;
+}
+
+be_fec_env_t *be_new_frame_entity_coalescer(be_irg_t *birg)
+{
+ const arch_env_t *arch_env = &birg->main_env->arch_env;
+ be_fec_env_t *env = xmalloc(sizeof(env[0]));
+
+ be_liveness_assure_chk(be_assure_liveness(birg));
+
+ obstack_init(&env->obst);
+ env->arch_env = arch_env;
+ env->birg = birg;
+ env->spills = new_set(cmp_spill, 10);
+ env->reloads = NEW_ARR_F(ir_node*, 0);
+ env->affinity_edges = NEW_ARR_F(affinity_edge_t*, 0);
+ env->memperms = new_set(cmp_memperm, 10);
+
+ return env;
+}
+
+void be_free_frame_entity_coalescer(be_fec_env_t *env)
+{
+ del_set(env->memperms);
+ DEL_ARR_F(env->reloads);
+ DEL_ARR_F(env->affinity_edges);
+ del_set(env->spills);
+ obstack_free(&env->obst, NULL);
+
+ free(env);
+}
+
+void be_assign_entities(be_fec_env_t *env)
+{
+ stat_ev_dbl("spillslots", set_count(env->spills));
+
+ if(be_coalesce_spill_slots) {
+ do_greedy_coalescing(env);
+ }
+
+ stat_ev_dbl("spillslots_after_coalescing", count_spillslots(env));
+
+ assign_spillslots(env);
+
+ create_memperms(env);
+}
+
+/**
+ * This walker function searches for reloads and collects all the spills
+ * and memphis attached to them.
+ */
+static void collect_spills_walker(ir_node *node, void *data)
+{
+ be_fec_env_t *env = data;
+ const arch_env_t *arch_env = env->arch_env;
+ const ir_mode *mode;
+ const arch_register_class_t *cls;
+ int align;
+
+ /* classify returns classification of the irn the proj is attached to */
+ if (is_Proj(node))
+ return;
+
+ if (!arch_irn_class_is(arch_env, node, reload))
+ return;
+
+ mode = get_irn_mode(node);
+ cls = arch_get_irn_reg_class(arch_env, node, -1);
+ align = arch_isa_get_reg_class_alignment(arch_env_get_isa(arch_env), cls);
- /* Get initial spill slots */
- irg_walk_graph(chordal_env->irg, NULL, collect_spills_walker, &env);
+ be_node_needs_frame_entity(env, node, mode, align);
+}
- do_greedy_coalescing(&env);
+void be_coalesce_spillslots(be_irg_t *birg)
+{
+ be_fec_env_t *env = be_new_frame_entity_coalescer(birg);
- assign_spillslots(&env);
+ /* collect reloads */
+ irg_walk_graph(birg->irg, NULL, collect_spills_walker, env);
- create_memperms(&env);
+ be_assign_entities(env);
- //show_stats(&env);
+ be_free_frame_entity_coalescer(env);
+}
- del_set(env.memperms);
- DEL_ARR_F(env.reloads);
- DEL_ARR_F(env.affinity_edges);
- del_set(env.spills);
- obstack_free(&env.obst, NULL);
+void be_init_spillslots(void)
+{
+ FIRM_DBG_REGISTER(dbg, "firm.be.spillslots");
}
+
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_spillslots);
projects / libfirm / blobdiff