* @file
* @brief implementation of the spill/reload placement abstraction layer
* @author Daniel Grund, Sebastian Hack, Matthias Braun
- * @date 29.09.2005
+ * @date 29.09.2005
* @version $Id$
*/
#include "config.h"
#include "bestatevent.h"
#include "bessaconstr.h"
#include "beirg.h"
+#include "beirgmod.h"
#include "beintlive_t.h"
#include "bemodule.h"
#include "be_t.h"
const arch_env_t *arch_env;
ir_graph *irg;
struct obstack obst;
- be_irg_t *birg;
int spill_cost; /**< the cost of a single spill node */
int reload_cost; /**< the cost of a reload node */
set *spills; /**< all spill_info_t's, which must be
ir_nodeset_t mem_phis; /**< set of all spilled phis. */
ir_exec_freq *exec_freq;
-#ifdef FIRM_STATISTICS
unsigned spill_count;
unsigned reload_count;
unsigned remat_count;
unsigned spilled_phi_count;
-#endif
};
/**
*/
static int cmp_spillinfo(const void *x, const void *y, size_t size)
{
- const spill_info_t *xx = x;
- const spill_info_t *yy = y;
+ const spill_info_t *xx = (const spill_info_t*)x;
+ const spill_info_t *yy = (const spill_info_t*)y;
(void) size;
return xx->to_spill != yy->to_spill;
int hash = hash_irn(value);
info.to_spill = value;
- res = set_find(env->spills, &info, sizeof(info), hash);
+ res = (spill_info_t*)set_find(env->spills, &info, sizeof(info), hash);
if (res == NULL) {
info.reloaders = NULL;
info.spills = NULL;
info.spill_costs = -1;
info.reload_cls = NULL;
- res = set_insert(env->spills, &info, sizeof(info), hash);
+ res = (spill_info_t*)set_insert(env->spills, &info, sizeof(info), hash);
}
return res;
}
-spill_env_t *be_new_spill_env(be_irg_t *birg)
+spill_env_t *be_new_spill_env(ir_graph *irg)
{
- const arch_env_t *arch_env = birg->main_env->arch_env;
+ const arch_env_t *arch_env = be_get_irg_arch_env(irg);
spill_env_t *env = XMALLOC(spill_env_t);
- env->spills = new_set(cmp_spillinfo, 1024);
- env->irg = be_get_birg_irg(birg);
- env->birg = birg;
+ env->spills = new_set(cmp_spillinfo, 1024);
+ env->irg = irg;
env->arch_env = arch_env;
ir_nodeset_init(&env->mem_phis);
env->spill_cost = arch_env->spill_cost;
env->reload_cost = arch_env->reload_cost;
- env->exec_freq = be_get_birg_exec_freq(birg);
+ env->exec_freq = be_get_irg_exec_freq(irg);
obstack_init(&env->obst);
-#ifdef FIRM_STATISTICS
env->spill_count = 0;
env->reload_count = 0;
env->remat_count = 0;
env->spilled_phi_count = 0;
-#endif
return env;
}
void be_add_spill(spill_env_t *env, ir_node *to_spill, ir_node *after)
{
spill_info_t *spill_info = get_spillinfo(env, to_spill);
- const ir_node *insn = skip_Proj_const(to_spill);
spill_t *spill;
spill_t *s;
spill_t *last;
- assert(!arch_irn_is(insn, dont_spill));
+ assert(!arch_irn_is(skip_Proj_const(to_spill), dont_spill));
DB((dbg, LEVEL_1, "Add spill of %+F after %+F\n", to_spill, after));
/* Just for safety make sure that we do not insert the spill in front of a phi */
spill_info->spills = spill;
}
-void be_add_remat(spill_env_t *env, ir_node *to_spill, ir_node *before,
- ir_node *rematted_node)
-{
- spill_info_t *spill_info;
- reloader_t *reloader;
-
- spill_info = get_spillinfo(env, to_spill);
-
- /* add the remat information */
- reloader = OALLOC(&env->obst, reloader_t);
- reloader->next = spill_info->reloaders;
- reloader->reloader = before;
- reloader->rematted_node = rematted_node;
- reloader->remat_cost_delta = 0; /* We will never have a cost win over a
- reload since we're not even allowed to
- create a reload */
-
- spill_info->reloaders = reloader;
-
- DBG((dbg, LEVEL_1, "creating spillinfo for %+F, will be rematerialized before %+F\n",
- to_spill, before));
-}
-
void be_add_reload2(spill_env_t *env, ir_node *to_spill, ir_node *before,
ir_node *can_spill_after, const arch_register_class_t *reload_cls,
int allow_remat)
{
spill_info_t *info;
reloader_t *rel;
- const ir_node *insn = skip_Proj_const(to_spill);
- assert(!arch_irn_is(insn, dont_spill));
+ assert(!arch_irn_is(skip_Proj_const(to_spill), dont_spill));
info = get_spillinfo(env, to_spill);
return last;
}
-static ir_node *skip_keeps_phis(ir_node *node)
+/**
+ * determine final spill position: it should be after all phis, keep nodes
+ * and behind nodes marked as prolog
+ */
+static ir_node *determine_spill_point(ir_node *node)
{
+ node = skip_Proj(node);
while (true) {
ir_node *next = sched_next(node);
if (!is_Phi(next) && !be_is_Keep(next) && !be_is_CopyKeep(next))
}
void be_add_reload_on_edge(spill_env_t *env, ir_node *to_spill, ir_node *block,
- int pos, const arch_register_class_t *reload_cls,
+ int pos, const arch_register_class_t *reload_cls,
int allow_remat)
{
ir_node *before = get_block_insertion_point(block, pos);
void be_spill_phi(spill_env_t *env, ir_node *node)
{
ir_node *block;
- spill_info_t* spill;
int i, arity;
assert(is_Phi(node));
/* create spills for the phi arguments */
block = get_nodes_block(node);
- spill = get_spillinfo(env, node);
for (i = 0, arity = get_irn_arity(node); i < arity; ++i) {
ir_node *arg = get_irn_n(node, i);
ir_node *insert;
- //get_spillinfo(env, arg);
/* some backends have virtual noreg/unknown nodes that are not scheduled
* and simply always available. */
insert = be_get_end_of_block_insertion_point(pred_block);
insert = sched_prev(insert);
} else {
- insert = skip_keeps_phis(arg);
+ insert = determine_spill_point(arg);
}
be_add_spill(env, arg, insert);
* and simply always available. */
if (!sched_is_scheduled(insn)) {
/* override spillinfos or create a new one */
- spillinfo->spills->spill = new_NoMem();
+ ir_graph *irg = get_irn_irg(to_spill);
+ spillinfo->spills->spill = get_irg_no_mem(irg);
DB((dbg, LEVEL_1, "don't spill %+F use NoMem\n", to_spill));
return;
}
spill = spillinfo->spills;
for ( ; spill != NULL; spill = spill->next) {
ir_node *after = spill->after;
- ir_node *block = get_block(after);
+ after = determine_spill_point(after);
- after = skip_keeps_phis(after);
-
- spill->spill = be_spill(block, to_spill);
- sched_add_after(skip_Proj(after), spill->spill);
+ spill->spill = arch_env_new_spill(env->arch_env, to_spill, after);
DB((dbg, LEVEL_1, "\t%+F after %+F\n", spill->spill, after));
-#ifdef FIRM_STATISTICS
env->spill_count++;
-#endif
}
DBG((dbg, LEVEL_1, "\n"));
}
/* override or replace spills list... */
spill = OALLOC(&env->obst, spill_t);
- spill->after = skip_keeps_phis(phi);
- spill->spill = new_r_Phi(block, arity, ins, mode_M);
+ spill->after = determine_spill_point(phi);
+ spill->spill = be_new_Phi(block, arity, ins, mode_M, NULL);
spill->next = NULL;
+ sched_add_after(block, spill->spill);
spillinfo->spills = spill;
-#ifdef FIRM_STATISTICS
env->spilled_phi_count++;
-#endif
for (i = 0; i < arity; ++i) {
ir_node *arg = get_irn_n(phi, i);
static int is_value_available(spill_env_t *env, const ir_node *arg,
const ir_node *reloader)
{
- if (is_Unknown(arg) || arg == new_NoMem())
+ if (is_Unknown(arg) || is_NoMem(arg))
return 1;
if (be_is_Spill(skip_Proj_const(arg)))
(void)reloader;
+ if (get_irn_mode(arg) == mode_T)
+ return 0;
+
/*
* Ignore registers are always available
*/
if (arch_irn_is_ignore(arg))
return 1;
- return 0;
+ return 0;
}
/**
return REMAT_COST_INFINITE;
}
/* never rematerialize a node which modifies the flags.
- * (would be better to test wether the flags are actually live at point
+ * (would be better to test whether the flags are actually live at point
* reloader...)
*/
if (arch_irn_is(insn, modify_flags)) {
/**
* Re-materialize a node.
*
- * @param senv the spill environment
+ * @param env the spill environment
* @param spilled the node that was spilled
* @param reloader a irn that requires a reload
*/
ins[i] = arg;
} else {
ins[i] = do_remat(env, arg, reloader);
-#ifdef FIRM_STATISTICS
- /* don't count the recursive call as remat */
- env->remat_count--;
-#endif
+ /* don't count the argument rematerialization as an extra remat */
+ --env->remat_count;
}
}
/* insert in schedule */
sched_reset(res);
sched_add_before(reloader, res);
-#ifdef FIRM_STATISTICS
- env->remat_count++;
-#endif
+ ++env->remat_count;
}
return res;
return be_get_reload_costs(env, to_spill, before);
}
+ir_node *be_new_spill(ir_node *value, ir_node *after)
+{
+ ir_graph *irg = get_irn_irg(value);
+ ir_node *frame = get_irg_frame(irg);
+ const arch_register_class_t *cls = arch_get_irn_reg_class(value);
+ const arch_register_class_t *cls_frame = arch_get_irn_reg_class(frame);
+ ir_node *block = get_block(after);
+ ir_node *spill
+ = be_new_Spill(cls, cls_frame, block, frame, value);
+
+ sched_add_after(after, spill);
+ return spill;
+}
+
+ir_node *be_new_reload(ir_node *value, ir_node *spill, ir_node *before)
+{
+ ir_graph *irg = get_irn_irg(value);
+ ir_node *frame = get_irg_frame(irg);
+ ir_node *block = get_block(before);
+ const arch_register_class_t *cls = arch_get_irn_reg_class(value);
+ const arch_register_class_t *cls_frame = arch_get_irn_reg_class(frame);
+ ir_mode *mode = get_irn_mode(value);
+ ir_node *reload;
+
+ assert(be_is_Spill(spill) || is_Phi(spill));
+ assert(get_irn_mode(spill) == mode_M);
+
+ reload = be_new_Reload(cls, cls_frame, block, frame, spill, mode);
+ sched_add_before(before, reload);
+
+ return reload;
+}
+
/*
* ___ _ ____ _ _
* |_ _|_ __ ___ ___ _ __| |_ | _ \ ___| | ___ __ _ __| |___
* predecessor (of a PhiM) but this test might match other things too...
*/
if (!sched_is_scheduled(insn)) {
+ ir_graph *irg = get_irn_irg(to_spill);
/* override spillinfos or create a new one */
spill_t *spill = OALLOC(&env->obst, spill_t);
spill->after = NULL;
spill->next = NULL;
- spill->spill = new_NoMem();
+ spill->spill = get_irg_no_mem(irg);
spillinfo->spills = spill;
spillinfo->spill_costs = 0;
/* override spillinfos or create a new one */
spill = OALLOC(&env->obst, spill_t);
- spill->after = skip_keeps_phis(to_spill);
+ spill->after = determine_spill_point(to_spill);
spill->next = NULL;
spill->spill = NULL;
}
/* process each spilled node */
- for (si = set_first(env->spills); si; si = set_next(env->spills)) {
- reloader_t *rld;
+ foreach_set(env->spills, spill_info_t*, si) {
ir_node *to_spill = si->to_spill;
- ir_mode *mode = get_irn_mode(to_spill);
ir_node **copies = NEW_ARR_F(ir_node*, 0);
double all_remat_costs = 0; /** costs when we would remat all nodes */
- int force_remat = 0;
+ bool force_remat = false;
+ reloader_t *rld;
DBG((dbg, LEVEL_1, "\nhandling all reloaders of %+F:\n", to_spill));
if (all_remat_costs < 0) {
DBG((dbg, LEVEL_1, "\nforcing remats of all reloaders (%f)\n",
all_remat_costs));
- force_remat = 1;
+ force_remat = true;
}
}
/* create a reload, use the first spill for now SSA
* reconstruction for memory comes below */
assert(si->spills != NULL);
- copy = be_reload(si->reload_cls, rld->reloader, mode,
- si->spills->spill);
-#ifdef FIRM_STATISTICS
+ copy = arch_env_new_reload(env->arch_env, si->to_spill,
+ si->spills->spill, rld->reloader);
env->reload_count++;
-#endif
}
DBG((dbg, LEVEL_1, " %+F of %+F before %+F\n",
* SSA form for the spilled value */
if (ARR_LEN(copies) > 0) {
be_ssa_construction_env_t senv;
- /* be_lv_t *lv = be_get_birg_liveness(env->birg); */
+ /* be_lv_t *lv = be_get_irg_liveness(env->irg); */
- be_ssa_construction_init(&senv, env->birg);
+ be_ssa_construction_init(&senv, env->irg);
be_ssa_construction_add_copy(&senv, to_spill);
be_ssa_construction_add_copies(&senv, copies, ARR_LEN(copies));
be_ssa_construction_fix_users(&senv, to_spill);
be_ssa_construction_env_t senv;
- be_ssa_construction_init(&senv, env->birg);
+ be_ssa_construction_init(&senv, env->irg);
spill = si->spills;
for ( ; spill != NULL; spill = spill->next) {
/* maybe we rematerialized the value and need no spill */
/* Matze: In theory be_ssa_construction should take care of the liveness...
* try to disable this again in the future */
- be_liveness_invalidate(env->birg->lv);
+ be_liveness_invalidate(be_get_irg_liveness(env->irg));
- be_remove_dead_nodes_from_schedule(env->birg);
+ be_remove_dead_nodes_from_schedule(env->irg);
be_timer_pop(T_RA_SPILL_APPLY);
}
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_spill)
void be_init_spill(void)
{
FIRM_DBG_REGISTER(dbg, "firm.be.spill");
}
-
-BE_REGISTER_MODULE_CONSTRUCTOR(be_init_spill);
projects / libfirm / blobdiff