#define DBG_WSETS 2
#define DBG_FIX 4
#define DBG_SPILL 8
+#define DBG_START 16
#define DBG_TRACE 32
-#define DEBUG_LVL SET_LEVEL_0 //(DBG_DECIDE | DBG_WSETS | DBG_FIX | DBG_SPILL)
+#define DEBUG_LVL (DBG_START | DBG_DECIDE | DBG_WSETS | DBG_FIX | DBG_SPILL)
static firm_dbg_module_t *dbg = NULL;
typedef struct _workset_t workset_t;
typedef struct _block_info_t block_info_t;
-typedef struct _reloader_t reloader_t;
-typedef struct _spill_info_t spill_info_t;
typedef struct _belady_env_t belady_env_t;
struct _workset_t {
workset_t *ws_start, *ws_end;
};
-struct _reloader_t {
- reloader_t *next;
- ir_node *reloader;
-};
-
-struct _spill_info_t {
- ir_node *spilled_node;
- reloader_t *reloaders;
-};
-
struct _belady_env_t {
struct obstack ob;
const be_node_factory_t *factory;
ir_node *instr; /**< current instruction */
unsigned instr_nr; /**< current instruction number (relative to block start) */
pset *used; /**< holds the values used (so far) in the current BB */
- set *spills; /**< all spill_info_t's, which must be placed */
- spill_env_t senv; /* see bespill.h */
+ spill_env_t *senv; /* see bespill.h */
pset *reloads; /**< all reload nodes placed */
};
-static int set_cmp_spillinfo(const void *x, const void *y, size_t size) {
- const spill_info_t *xx = x;
- const spill_info_t *yy = y;
- return ! (xx->spilled_node == yy->spilled_node);
-}
-
-
/**
* Alloc a new workset on obstack @p ob with maximum size @p max
*/
}
}
-static INLINE int workset_contains(const workset_t *ws, ir_node *val) {
+static INLINE int workset_contains(const workset_t *ws, const ir_node *val) {
int i;
for(i=0; i<ws->len; ++i)
if (ws->vals[i].irn == val)
sched_foreach(blk, irn)
if (is_Phi(irn) && arch_get_irn_reg_class(bel->arch, irn, 0) == bel->cls) {
loc.irn = irn;
- loc.time = be_get_next_use(bel->uses, first, 0, irn, 1);
+ loc.time = be_get_next_use(bel->uses, first, 0, irn, 0);
+ DBG((dbg, DBG_START, " %+F next-use %d\n", loc.irn, loc.time));
obstack_grow(&ob, &loc, sizeof(loc));
count++;
} else
live_foreach(blk, li)
if (live_is_in(li) && arch_get_irn_reg_class(bel->arch, li->irn, 0) == bel->cls) {
loc.irn = (ir_node *)li->irn;
- loc.time = be_get_next_use(bel->uses, first, 0, li->irn, 1);
+ loc.time = be_get_next_use(bel->uses, first, 0, li->irn, 0);
+ DBG((dbg, DBG_START, " %+F next-use %d\n", loc.irn, loc.time));
obstack_grow(&ob, &loc, sizeof(loc));
count++;
}
if (!workset_contains(ws, val)) {
DBG((dbg, DBG_DECIDE, " insert %+F\n", val));
to_insert[demand++] = val;
-
- if (is_usage) {
- spill_info_t si, *found;
- reloader_t *rld;
-
- /* find the spill info or create it */
- si.spilled_node = val;
- si.reloaders = NULL;
- found = set_insert(bel->spills, &si, sizeof(si), HASH_PTR(si.spilled_node));
-
- /* insert the reloader into the linked list */
- rld = obstack_alloc(&bel->ob, sizeof(*rld));
- rld->reloader = bel->instr;
- rld->next = found->reloaders;
- found->reloaders = rld;
- }
+ if (is_usage)
+ be_add_spill(bel->senv, val, bel->instr);
} else
DBG((dbg, DBG_DECIDE, " skip %+F\n", val));
}
DBG((dbg, DBG_FIX, " Pred %+F\n", pred));
workset_foreach(wsb, irnb) {
- spill_info_t si, *found;
- reloader_t *rld;
-
/* if irnb is a phi of the current block we reload
* the corresponding argument, else irnb itself */
if(is_Phi(irnb) && blk == get_nodes_block(irnb))
goto next_value;
/* irnb is in memory at the end of pred, so we have to reload it */
-
- /* find the spill info or create it */
- si.spilled_node = irnb;
- si.reloaders = NULL;
- found = set_insert(bel->spills, &si, sizeof(si), HASH_PTR(si.spilled_node));
-
- /* insert the reloader into the linked list.
- * the schedule position depends on the cf-situation of the block */
- rld = obstack_alloc(&bel->ob, sizeof(*rld));
- rld->reloader = (max==1) ? sched_skip(sched_first(blk), 1, sched_skip_phi_predicator, NULL) : pred;
- rld->next = found->reloaders;
- found->reloaders = rld;
-
- DBG((dbg, DBG_FIX, " reload %+F before %+F\n", irnb, rld->reloader));
+ be_add_spill_on_edge(bel->senv, irnb, blk, i);
next_value:
/*epsilon statement :)*/;
}
}
-static void insert_spills_reloads(ir_graph *irg, belady_env_t *bel) {
- ir_node *irn;
- spill_info_t *si;
- struct obstack ob;
- obstack_init(&ob);
-
- /* get all special spilled phis */
- for(si = set_first(bel->spills); si; si = set_next(bel->spills)) {
- irn = si->spilled_node;
- if (is_Phi(irn)) {
- ir_node *blk = get_nodes_block(irn);
- workset_t *sws = ((block_info_t *)get_irn_link(blk))->ws_start;
- if (!workset_contains(sws, irn))
- pset_insert_ptr(bel->senv.mem_phis, irn);
- }
- }
-
- /* process each spilled node */
- for(si = set_first(bel->spills); si; si = set_next(bel->spills)) {
- reloader_t *rld;
- ir_node **reloads;
- int n_reloads = 0;
- ir_mode *mode = get_irn_mode(si->spilled_node);
-
- /* go through all reloads for this spill */
- for(rld = si->reloaders; rld; rld = rld->next) {
- /* the spill for this reloader */
- ir_node *spill = be_spill_node(&bel->senv, si->spilled_node);
-
- /* the reload */
- ir_node *bl = is_Block(rld->reloader) ? rld->reloader : get_nodes_block(rld->reloader);
- ir_node *reload = new_Reload(bel->factory, bel->cls, irg, bl, mode, spill);
- DBG((dbg, DBG_SPILL, " RELOADER %+F Reload %+F of %+F\n", rld->reloader, reload, si->spilled_node));
- pset_insert_ptr(bel->reloads, reload);
-
- /* remember the reaload */
- obstack_ptr_grow(&ob, reload);
- sched_add_before(rld->reloader, reload);
- n_reloads++;
- }
-
- assert(n_reloads > 0);
- reloads = obstack_finish(&ob);
- be_introduce_copies_ignore(bel->senv.session->dom_front, si->spilled_node, n_reloads, reloads, bel->senv.mem_phis);
- obstack_free(&ob, reloads);
- }
-
- obstack_free(&ob, NULL);
-
- be_remove_spilled_phis(&bel->senv);
-}
-
/**
* Removes all used reloads from bel->reloads.
* The remaining nodes in bel->reloads will be removed from the graph.
}
}
+static int is_mem_phi(const ir_node *irn, void *data) {
+ ir_node *blk = get_nodes_block(irn);
+ workset_t *sws = ((block_info_t *)get_irn_link(blk))->ws_start;
+ return !workset_contains(sws, irn);
+}
+
void be_spill_belady(const be_main_session_env_t *session, const arch_register_class_t *cls) {
ir_node *irn;
/* init belady env */
belady_env_t *bel = alloca(sizeof(*bel));
obstack_init(&bel->ob);
- bel->senv.session = session;
bel->factory = session->main_env->node_factory;
bel->arch = session->main_env->arch_env;
bel->cls = cls;
bel->n_regs = arch_register_class_n_regs(cls);
bel->ws = new_workset(&bel->ob, bel);
bel->uses = be_begin_uses(session->irg, session->main_env->arch_env, cls);
- bel->spills = new_set(set_cmp_spillinfo, 32);
- bel->senv.spill_ctxs = new_set(be_set_cmp_spillctx, 32);
- bel->senv.mem_phis = pset_new_ptr_default();
+ bel->senv = be_new_spill_env(dbg, session, cls);
bel->reloads = pset_new_ptr_default();
/* do the work */
irg_block_walk_graph(session->irg, decide, NULL, bel);
irg_block_walk_graph(session->irg, fix_block_borders, NULL, bel);
- insert_spills_reloads(session->irg, bel);
+ be_insert_spills_reloads(bel->senv, bel->reloads, is_mem_phi, NULL);
/* find all unused reloads and remove them from the schedule */
irg_walk_graph(session->irg, rescue_used_reloads, NULL, bel);
/* clean up */
del_pset(bel->reloads);
- del_pset(bel->senv.mem_phis);
- del_set(bel->senv.spill_ctxs);
- del_set(bel->spills);
+ be_delete_spill_env(bel->senv);
be_end_uses(bel->uses);
obstack_free(&bel->ob, NULL);
}
projects / libfirm / blobdiff