/*
- * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
* @date 26.07.2006
* @version $Id$
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
#include <stdlib.h>
#include "besched.h"
#include "bespillslots.h"
#include "bechordal_t.h"
-#include "bejavacoal.h"
#include "bestatevent.h"
#include "bespilloptions.h"
#include "bemodule.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;
- /** mode of the spilled value */
- const ir_mode *mode;
- /** alignment for the spilled value */
- int alignment;
- /** 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 {
const affinity_edge_t * const *e1 = d1;
const affinity_edge_t * const *e2 = d2;
- // sort in descending order
+ /* sort in descending order */
return (*e1)->affinity < (*e2)->affinity ? 1 : -1;
}
return res;
}
-/*
- * ____ _ _ _ ____ _ _ _
- * / ___|___ | | | ___ ___| |_ / ___| _ __ (_) | |___
- * | | / _ \| | |/ _ \/ __| __| \___ \| '_ \| | | / __|
- * | |__| (_) | | | __/ (__| |_ ___) | |_) | | | \__ \
- * \____\___/|_|_|\___|\___|\__| |____/| .__/|_|_|_|___/
- * |_|
- */
-static INLINE ir_node *get_memory_edge(const ir_node *node)
+static inline ir_node *get_memory_edge(const ir_node *node)
{
int i, arity;
const ir_mode *mode, int align)
{
spill_t spill, *res;
- int hash = hash_irn(node);
+ int hash = hash_irn(node);
/* insert into set of spills if not already there */
spill.spill = node;
spill.mode = mode;
spill.alignment = align;
res = set_insert(env->spills, &spill, sizeof(spill), hash);
+ DB((dbg, DBG_COALESCING, "Slot %d: %+F\n", spill.spillslot, node));
} else {
assert(res->mode == mode);
assert(res->alignment == align);
spill.spillslot = set_count(env->spills);
spill.mode = mode;
spill.alignment = align;
+ DB((dbg, DBG_COALESCING, "Slot %d: %+F\n", spill.spillslot, node));
res = set_insert(env->spills, &spill, sizeof(spill), hash);
- // collect attached spills and mem-phis
+ /* collect attached spills and mem-phis */
arity = get_irn_arity(node);
for(i = 0; i < arity; ++i) {
affinity_edge_t *affinty_edge;
arg_spill = collect_spill(env, arg, mode, align);
}
- // add an affinity edge
+ /* 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;
assert(spillnode != NULL);
+ /* walk upwards and collect all phis and spills on this way */
if (is_Phi(spillnode)) {
spill = collect_memphi(env, spillnode, mode, align);
} else {
ARR_APP1(ir_node *, env->reloads, node);
}
-/*
- * ____ _ ____ _ _
- * / ___|___ __ _| | ___ ___ ___ ___ / ___|| | ___ | |_ ___
- * | | / _ \ / _` | |/ _ \/ __|/ __/ _ \ \___ \| |/ _ \| __/ __|
- * | |__| (_) | (_| | | __/\__ \ (_| __/ ___) | | (_) | |_\__ \
- * \____\___/ \__,_|_|\___||___/\___\___| |____/|_|\___/ \__|___/
- */
+
static int merge_interferences(be_fec_env_t *env, bitset_t** interferences,
int* spillslot_unionfind, int s1, int s2)
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];
if(spillcount == 0)
return;
- DBG((dbg, DBG_COALESCING, "Coalescing %d spillslots\n", spillcount));
+ DB((dbg, DBG_COALESCING, "Coalescing %d spillslots\n", spillcount));
- interferences = alloca(spillcount * sizeof(interferences[0]));
- spillslot_unionfind = alloca(spillcount * sizeof(spillslot_unionfind[0]));
- spilllist = alloca(spillcount * sizeof(spilllist[0]));
+ interferences = ALLOCAN(bitset_t*, spillcount);
+ spillslot_unionfind = ALLOCAN(int, spillcount);
+ spilllist = ALLOCAN(spill_t*, spillcount);
- uf_init(spillslot_unionfind, 0, spillcount);
+ uf_init(spillslot_unionfind, spillcount);
DEBUG_ONLY(
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;
}
continue;
if (my_values_interfere(env->birg, spill1, spill2)) {
- DBG((dbg, DBG_INTERFERENCES, "Slot %d and %d interfere\n", i, i2));
+ DB((dbg, DBG_INTERFERENCES,
+ "Slot %d and %d interfere\n", i, i2));
+
bitset_set(interferences[i], i2);
bitset_set(interferences[i2], i);
}
/* 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 */
for(i = 0; i < affinity_edge_count; ++i) {
continue;
}
- DBG((dbg, DBG_COALESCING, "Merging %d and %d because of affinity edge\n", s1, s2));
+ DB((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));
+ DB((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 to spills
+ /* 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");*/
}
-/*
- * _ _ _____ _ _ _ _
- * / \ ___ ___(_) __ _ _ __ | ____|_ __ | |_(_) |_(_) ___ ___
- * / _ \ / __/ __| |/ _` | '_ \ | _| | '_ \| __| | __| |/ _ \/ __|
- * / ___ \\__ \__ \ | (_| | | | | | |___| | | | |_| | |_| | __/\__ \
- * /_/ \_\___/___/_|\__, |_| |_| |_____|_| |_|\__|_|\__|_|\___||___/
- * |___/
- */
+
typedef struct _spill_slot_t {
int size;
{
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);
+ /* TODO: backend should be able to specify wether we want spill slots
+ * at begin or end of frame */
+ int at_start = 1;
+ ir_entity *res = frame_alloc_area(frame, slot->size, slot->align, at_start);
/* adjust size of the entity type... */
ir_type *enttype = get_entity_type(res);
}
-static void assign_spill_entity(const arch_env_t *arch_env, ir_node *node, ir_entity *entity)
+static void assign_spill_entity(ir_node *node, ir_entity *entity)
{
if(is_NoMem(node))
return;
ir_node *in = get_irn_n(node, i);
assert(!is_Phi(in));
- assign_spill_entity(arch_env, in, entity);
+ assign_spill_entity(in, entity);
}
return;
}
- assert(arch_get_frame_entity(arch_env, node) == NULL);
- arch_set_frame_entity(arch_env, node, entity);
+ /* beware: we might have Stores with Memory Proj's, ia32 fisttp for instance */
+ node = skip_Proj(node);
+ assert(arch_get_frame_entity(node) == NULL);
+ arch_set_frame_entity(node, entity);
}
/**
*/
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;
- spill_slot_t* spillslots;
+ int spillcount = set_count(env->spills);
+ spill_slot_t *spillslots = ALLOCANZ(spill_slot_t, spillcount);
+ spill_t *spill;
+ int i;
- spillcount = set_count(env->spills);
- spillslots = alloca(spillcount * sizeof(spillslots[0]));
-
- 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]);
}
}
- 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) {
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) {
}
}
} else {
- assign_spill_entity(arch_env, node, slot->entity);
+ assign_spill_entity(node, slot->entity);
}
}
for(i = 0; i < ARR_LEN(env->reloads); ++i) {
- 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];
+ 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);
- arch_set_frame_entity(arch_env, reload, slot->entity);
+ arch_set_frame_entity(reload, slot->entity);
}
}
memperm_t *memperm;
for(memperm = set_first(env->memperms); memperm != NULL; memperm = set_next(env->memperms)) {
- int i;
- memperm_entry_t *entry;
- ir_node *blockend;
- ir_node** nodes = alloca(memperm->entrycount * sizeof(nodes[0]));
- ir_node* mempermnode;
+ ir_node **nodes = ALLOCAN(ir_node*, memperm->entrycount);
+ memperm_entry_t *entry;
+ ir_node *blockend;
+ ir_node *mempermnode;
+ int i;
assert(memperm->entrycount > 0);
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_before(blockend, mempermnode);
stat_ev_dbl("mem_perm", memperm->entrycount);
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_fec_env_t *env = XMALLOC(be_fec_env_t);
be_liveness_assure_chk(be_assure_liveness(birg));
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;
if (is_Proj(node))
return;
- if (!arch_irn_class_is(arch_env, node, reload))
+ if (!arch_irn_class_is(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);
+ cls = arch_get_irn_reg_class_out(node);
+ align = arch_env_get_reg_class_alignment(env->arch_env, cls);
be_node_needs_frame_entity(env, node, mode, align);
}