* @date 20.09.2005
* @version $Id$
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
#include <stdbool.h>
#include "ircons_t.h"
#include "irprintf.h"
#include "irnodeset.h"
-#include "xmalloc.h"
#include "beutil.h"
-#include "bearch_t.h"
+#include "bearch.h"
#include "beuses.h"
-#include "besched_t.h"
+#include "besched.h"
#include "beirgmod.h"
#include "belive_t.h"
-#include "benode_t.h"
+#include "benode.h"
#include "bechordal_t.h"
-#include "bespilloptions.h"
-#include "beloopana.h"
-#include "beirg_t.h"
#include "bespill.h"
+#include "beloopana.h"
+#include "beirg.h"
+#include "bespillutil.h"
#include "bemodule.h"
#define DBG_SPILL 1
} workset_t;
static struct obstack obst;
-static const arch_env_t *arch_env;
static const arch_register_class_t *cls;
static const be_lv_t *lv;
static be_loopana_t *loop_ana;
static spill_env_t *senv; /**< see bespill.h */
static ir_node **blocklist;
-static bool move_spills = true;
-static bool respectloopdepth = true;
-static bool improve_known_preds = true;
+static int move_spills = true;
+static int respectloopdepth = true;
+static int improve_known_preds = true;
/* factor to weight the different costs of reloading/rematerializing a node
(see bespill.h be_get_reload_costs_no_weight) */
static int remat_bonus = 10;
return p->time - q->time;
}
-void workset_print(const workset_t *w)
-{
- int i;
-
- for(i = 0; i < w->len; ++i) {
- ir_fprintf(stderr, "%+F %d\n", w->vals[i].node, w->vals[i].time);
- }
-}
-
/**
* Alloc a new workset on obstack @p ob with maximum size @p max
*/
static workset_t *new_workset(void)
{
- workset_t *res;
- size_t size = sizeof(*res) + n_regs * sizeof(res->vals[0]);
-
- res = obstack_alloc(&obst, size);
- memset(res, 0, size);
- return res;
+ return OALLOCFZ(&obst, workset_t, vals, n_regs);
}
/**
*/
static workset_t *workset_clone(workset_t *workset)
{
- workset_t *res;
- size_t size = sizeof(*res) + n_regs * sizeof(res->vals[0]);
- res = obstack_alloc(&obst, size);
- memcpy(res, workset, size);
+ workset_t *res = OALLOCF(&obst, workset_t, vals, n_regs);
+ memcpy(res, workset, sizeof(*res) + n_regs * sizeof(res->vals[0]));
return res;
}
loc_t *loc;
int i;
/* check for current regclass */
- assert(arch_irn_consider_in_reg_alloc(arch_env, cls, val));
+ assert(arch_irn_consider_in_reg_alloc(cls, val));
/* check if val is already contained */
for (i = 0; i < workset->len; ++i) {
/**
* Removes the value @p val from the workset if present.
*/
-static INLINE void workset_remove(workset_t *workset, ir_node *val)
+static inline void workset_remove(workset_t *workset, ir_node *val)
{
int i;
- for(i = 0; i < workset->len; ++i) {
+ for (i = 0; i < workset->len; ++i) {
if (workset->vals[i].node == val) {
workset->vals[i] = workset->vals[--workset->len];
return;
}
}
-static INLINE const loc_t *workset_contains(const workset_t *ws,
+static inline const loc_t *workset_contains(const workset_t *ws,
const ir_node *val)
{
int i;
* @p v A variable to put the current value in
* @p i An integer for internal use
*/
-#define workset_foreach(ws, v, i) for(i=0; \
+#define workset_foreach(ws, v, i) for (i=0; \
v=(i < ws->len) ? ws->vals[i].node : NULL, i < ws->len; \
++i)
#define workset_set_length(ws, length) (ws)->len = length
#define workset_get_length(ws) ((ws)->len)
#define workset_get_val(ws, i) ((ws)->vals[i].node)
-#define workset_sort(ws) qsort((ws)->vals, (ws)->len, sizeof((ws)->vals[0]), loc_compare);
+#define workset_sort(ws) do { qsort((ws)->vals, (ws)->len, sizeof((ws)->vals[0]), loc_compare); } while(0)
typedef struct _block_info_t
{
} block_info_t;
-static void *new_block_info(void)
+static block_info_t *new_block_info(void)
{
- block_info_t *res = obstack_alloc(&obst, sizeof(res[0]));
- memset(res, 0, sizeof(res[0]));
-
- return res;
+ return OALLOCZ(&obst, block_info_t);
}
#define get_block_info(block) ((block_info_t *)get_irn_link(block))
/**
* @return The distance to the next use or 0 if irn has dont_spill flag set
*/
-static INLINE unsigned get_distance(ir_node *from, unsigned from_step,
+static inline unsigned get_distance(ir_node *from, unsigned from_step,
const ir_node *def, int skip_from_uses)
{
be_next_use_t use;
- int flags = arch_irn_get_flags(arch_env, def);
unsigned costs;
unsigned time;
- assert(! (flags & arch_irn_flags_ignore));
+ assert(!arch_irn_is_ignore(def));
use = be_get_next_use(uses, from, from_step, def, skip_from_uses);
time = use.time;
return USES_INFINITY;
/* We have to keep nonspillable nodes in the workingset */
- if (flags & arch_irn_flags_dont_spill)
+ if (arch_irn_get_flags(skip_Proj_const(def)) & arch_irn_flags_dont_spill)
return 0;
/* give some bonus to rematerialisable nodes */
*/
static void displace(workset_t *new_vals, int is_usage)
{
- ir_node **to_insert = alloca(n_regs * sizeof(to_insert[0]));
- bool *spilled = alloca(n_regs * sizeof(spilled[0]));
+ ir_node **to_insert = ALLOCAN(ir_node*, n_regs);
+ bool *spilled = ALLOCAN(bool, n_regs);
ir_node *val;
int i;
int len;
/* Only make more free room if we do not have enough */
if (spills_needed > 0) {
- ir_node *curr_bb = NULL;
- workset_t *ws_start = NULL;
-
- if (move_spills) {
- curr_bb = get_nodes_block(instr);
- ws_start = get_block_info(curr_bb)->start_workset;
- }
-
DB((dbg, DBG_DECIDE, " disposing %d values\n", spills_needed));
/* calculate current next-use distance for live values */
loc.node = node;
loc.spilled = false;
- if (!arch_irn_consider_in_reg_alloc(arch_env, cls, node)) {
+ if (!arch_irn_consider_in_reg_alloc(cls, node)) {
loc.time = USES_INFINITY;
return loc;
}
/* We have to keep nonspillable nodes in the workingset */
- if (arch_irn_get_flags(arch_env, node) & arch_irn_flags_dont_spill) {
+ if (arch_irn_get_flags(skip_Proj_const(node)) & arch_irn_flags_dont_spill) {
loc.time = 0;
DB((dbg, DBG_START, " %+F taken (dontspill node)\n", node, loc.time));
return loc;
DB((dbg, DBG_START, " %+F taken (%u, live in all preds)\n",
node, loc.time));
return loc;
- } else if(available == AVAILABLE_NOWHERE) {
+ } else if (available == AVAILABLE_NOWHERE) {
DB((dbg, DBG_START, " %+F not taken (%u, live in no pred)\n",
node, loc.time));
loc.time = USES_INFINITY;
/* check predecessors */
arity = get_irn_arity(block);
- pred_worksets = alloca(sizeof(pred_worksets[0]) * arity);
+ pred_worksets = ALLOCAN(workset_t*, arity);
all_preds_known = true;
- for(i = 0; i < arity; ++i) {
+ for (i = 0; i < arity; ++i) {
ir_node *pred_block = get_Block_cfgpred_block(block, i);
block_info_t *pred_info = get_block_info(pred_block);
if (! is_Phi(node))
break;
- if (!arch_irn_consider_in_reg_alloc(arch_env, cls, node))
+ if (!arch_irn_consider_in_reg_alloc(cls, node))
continue;
if (all_preds_known) {
int p, arity;
loc_t *loc = & delayed[i];
- /* don't use values which are dead in a known predecessors
- * to not induce unnecessary reloads */
- arity = get_irn_arity(block);
- for (p = 0; p < arity; ++p) {
- ir_node *pred_block = get_Block_cfgpred_block(block, p);
- block_info_t *pred_info = get_block_info(pred_block);
-
- if (pred_info == NULL)
- continue;
-
- if (!workset_contains(pred_info->end_workset, loc->node)) {
- DB((dbg, DBG_START,
- " delayed %+F not live at pred %+F\n", loc->node,
- pred_block));
- goto skip_delayed;
+ if (!is_Phi(loc->node)) {
+ /* don't use values which are dead in a known predecessors
+ * to not induce unnecessary reloads */
+ arity = get_irn_arity(block);
+ for (p = 0; p < arity; ++p) {
+ ir_node *pred_block = get_Block_cfgpred_block(block, p);
+ block_info_t *pred_info = get_block_info(pred_block);
+
+ if (pred_info == NULL)
+ continue;
+
+ if (!workset_contains(pred_info->end_workset, loc->node)) {
+ DB((dbg, DBG_START,
+ " delayed %+F not live at pred %+F\n", loc->node,
+ pred_block));
+ goto skip_delayed;
+ }
}
}
/* determine spill status of the values: If there's 1 pred block (which
* is no backedge) where the value is spilled then we must set it to
* spilled here. */
- for(i = 0; i < ws_count; ++i) {
+ for (i = 0; i < ws_count; ++i) {
loc_t *loc = &ws->vals[i];
ir_node *value = loc->node;
bool spilled;
/* determine if value was spilled on any predecessor */
spilled = false;
- for(n = 0; n < arity; ++n) {
+ for (n = 0; n < arity; ++n) {
workset_t *pred_workset = pred_worksets[n];
int p_len;
int p;
continue;
p_len = workset_get_length(pred_workset);
- for(p = 0; p < p_len; ++p) {
+ for (p = 0; p < p_len; ++p) {
loc_t *l = &pred_workset->vals[p];
if (l->node != value)
/* allocate all values _used_ by this instruction */
workset_clear(new_vals);
- for(i = 0, arity = get_irn_arity(irn); i < arity; ++i) {
+ for (i = 0, arity = get_irn_arity(irn); i < arity; ++i) {
ir_node *in = get_irn_n(irn, i);
- if (!arch_irn_consider_in_reg_alloc(arch_env, cls, in))
+ if (!arch_irn_consider_in_reg_alloc(cls, in))
continue;
/* (note that "spilled" is irrelevant here) */
foreach_out_edge(irn, edge) {
ir_node *proj = get_edge_src_irn(edge);
- if (!arch_irn_consider_in_reg_alloc(arch_env, cls, proj))
+ if (!arch_irn_consider_in_reg_alloc(cls, proj))
continue;
workset_insert(new_vals, proj, false);
}
} else {
- if (!arch_irn_consider_in_reg_alloc(arch_env, cls, irn))
+ if (!arch_irn_consider_in_reg_alloc(cls, irn))
continue;
workset_insert(new_vals, irn, false);
}
DB((dbg, DBG_FIX, "\n"));
DB((dbg, DBG_FIX, "Fixing %+F\n", block));
+ arity = get_irn_arity(block);
+ /* can happen for endless loops */
+ if (arity == 0)
+ return;
+
start_workset = get_block_info(block)->start_workset;
/* process all pred blocks */
- arity = get_irn_arity(block);
for (i = 0; i < arity; ++i) {
ir_node *pred = get_Block_cfgpred_block(block, i);
workset_t *pred_end_workset = get_block_info(pred)->end_workset;
assert(!l->spilled);
/* we might have unknowns as argument for the phi */
- if (!arch_irn_consider_in_reg_alloc(arch_env, cls, node))
+ if (!arch_irn_consider_in_reg_alloc(cls, node))
continue;
}
}
}
-static void add_block(ir_node *block, void *data)
-{
- (void) data;
- ARR_APP1(ir_node*, blocklist, block);
-}
-
static void be_spill_belady(be_irg_t *birg, const arch_register_class_t *rcls)
{
int i;
/* init belady env */
stat_ev_tim_push();
obstack_init(&obst);
- arch_env = birg->main_env->arch_env;
cls = rcls;
lv = be_get_birg_liveness(birg);
n_regs = cls->n_regs - be_put_ignore_regs(birg, cls, NULL);
uses = be_begin_uses(irg, lv);
loop_ana = be_new_loop_pressure(birg, cls);
senv = be_new_spill_env(birg);
- blocklist = NEW_ARR_F(ir_node*, 0);
- irg_block_edges_walk(get_irg_start_block(irg), NULL, add_block, NULL);
+ blocklist = be_get_cfgpostorder(irg);
stat_ev_tim_pop("belady_time_init");
stat_ev_tim_push();
obstack_free(&obst, NULL);
}
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_spillbelady);
void be_init_spillbelady(void)
{
static be_spiller_t belady_spiller = {
be_register_spiller("belady", &belady_spiller);
FIRM_DBG_REGISTER(dbg, "firm.be.spill.belady");
}
-
-BE_REGISTER_MODULE_CONSTRUCTOR(be_init_spillbelady);
projects / libfirm / blobdiff