/**
- * Author: Daniel Grund
+ * Author: Daniel Grund, Sebastian Hack
* Date: 29.09.2005
* Copyright: (c) Universitaet Karlsruhe
* Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
#include "pset.h"
#include "irnode_t.h"
#include "ircons_t.h"
+#include "iredges_t.h"
+#include "debug.h"
+#include "irgwalk.h"
#include "besched.h"
#include "bespill.h"
#include "benode_t.h"
+#include "bechordal_t.h"
+
+typedef struct _reloader_t reloader_t;
+typedef struct _spill_info_t spill_info_t;
+
+struct _reloader_t {
+ reloader_t *next;
+ ir_node *reloader;
+};
+
+struct _spill_info_t {
+ ir_node *spilled_node;
+ reloader_t *reloaders;
+};
typedef struct _spill_ctx_t {
ir_node *spilled; /**< The spilled node. */
ir_node *spill; /**< The spill itself. */
} spill_ctx_t;
-int be_set_cmp_spillctx(const void *a, const void *b, size_t n) {
+struct _spill_env_t {
+ firm_dbg_module_t *dbg;
+ const arch_register_class_t *cls;
+ const be_chordal_env_t *chordal_env;
+ struct obstack obst;
+ set *spill_ctxs;
+ set *spills; /**< all spill_info_t's, which must be placed */
+ pset *mem_phis; /**< set of all special spilled phis. allocated and freed seperately */
+ decide_irn_t is_mem_phi; /**< callback func to decide if a phi needs special spilling */
+ void *data; /**< data passed to all callbacks */
+};
+
+static int cmp_spillctx(const void *a, const void *b, size_t n) {
const spill_ctx_t *p = a;
const spill_ctx_t *q = b;
return !(p->user == q->user && p->spilled == q->spilled);
}
+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;
+ return ! (xx->spilled_node == yy->spilled_node);
+}
+
+spill_env_t *be_new_spill_env(firm_dbg_module_t *dbg,
+ const be_chordal_env_t *chordal_env,
+ decide_irn_t is_mem_phi, void *data) {
+
+ spill_env_t *env = malloc(sizeof(env[0]));
+ env->spill_ctxs = new_set(cmp_spillctx, 1024);
+ env->spills = new_set(cmp_spillinfo, 1024);
+ env->cls = chordal_env->cls;
+ env->dbg = dbg;
+ env->is_mem_phi = is_mem_phi;
+ env->data = data;
+ env->chordal_env = chordal_env;
+ obstack_init(&env->obst);
+ return env;
+}
+
+void be_delete_spill_env(spill_env_t *senv) {
+ del_set(senv->spill_ctxs);
+ del_set(senv->spills);
+ obstack_free(&senv->obst, NULL);
+ free(senv);
+}
+
static spill_ctx_t *be_get_spill_ctx(set *sc, ir_node *to_spill, ir_node *ctx_irn) {
spill_ctx_t templ;
static ir_node *be_spill_irn(spill_env_t *senv, ir_node *irn, ir_node *ctx_irn) {
spill_ctx_t *ctx;
-// DBG((dbg, DBG_SPILL, "spill_irn %+F\n", irn));
+ DBG((senv->dbg, LEVEL_1, "%+F in ctx %+F\n", irn, ctx_irn));
ctx = be_get_spill_ctx(senv->spill_ctxs, irn, ctx_irn);
if(!ctx->spill) {
- const be_main_env_t *env = senv->session->main_env;
- ctx->spill = be_spill(env->node_factory, env->arch_env, irn);
+ const be_main_env_t *env = senv->chordal_env->main_env;
+ ctx->spill = be_spill(env->node_factory, env->arch_env, irn, ctx_irn);
}
return ctx->spill;
static ir_node *be_spill_phi(spill_env_t *senv, ir_node *phi, ir_node *ctx_irn) {
int i, n = get_irn_arity(phi);
ir_node **ins, *bl = get_nodes_block(phi);
- ir_graph *irg = get_irn_irg(bl);
+ ir_graph *irg = senv->chordal_env->irg;
spill_ctx_t *ctx;
assert(is_Phi(phi));
-// DBG((dbg, DBG_SPILL, "spill_phi %+F\n", phi));
+ DBG((senv->dbg, LEVEL_1, "%+F in ctx %+F\n", phi, ctx_irn));
/* search an existing spill for this context */
ctx = be_get_spill_ctx(senv->spill_ctxs, phi, ctx_irn);
ins = malloc(n * sizeof(ins[0]));
for(i=0; i<n; ++i)
ins[i] = new_r_Unknown(irg, mode_M);
- ctx->spill = new_r_Phi(senv->session->irg, bl, n, ins, mode_M);
+ ctx->spill = new_r_Phi(senv->chordal_env->irg, bl, n, ins, mode_M);
free(ins);
/* re-wire the phiM */
return ctx->spill;
}
-ir_node *be_spill_node(spill_env_t *senv, ir_node *to_spill) {
+static ir_node *be_spill_node(spill_env_t *senv, ir_node *to_spill) {
ir_node *res;
if (pset_find_ptr(senv->mem_phis, to_spill))
res = be_spill_phi(senv, to_spill, to_spill);
return res;
}
-void be_remove_spilled_phis(spill_env_t *senv) {
+static void phi_walker(ir_node *irn, void *env) {
+ spill_env_t *senv = env;
+ const arch_env_t *arch = senv->chordal_env->main_env->arch_env;
+
+ if (is_Phi(irn) && arch_irn_has_reg_class(arch, irn, 0, senv->cls)
+ && senv->is_mem_phi(irn, senv->data)) {
+ DBG((senv->dbg, LEVEL_1, " %+F\n", irn));
+ pset_insert_ptr(senv->mem_phis, irn);
+ }
+}
+
+void be_insert_spills_reloads(spill_env_t *senv, pset *reload_set) {
+ ir_graph *irg = senv->chordal_env->irg;
ir_node *irn;
- /* remove all special phis form the irg and the schedule */
+ spill_info_t *si;
+ struct obstack ob;
+
+ obstack_init(&ob);
+
+ /* get all special spilled phis */
+ DBG((senv->dbg, LEVEL_1, "Mem-phis:\n"));
+ senv->mem_phis = pset_new_ptr_default();
+ irg_walk_graph(senv->chordal_env->irg, phi_walker, NULL, senv);
+
+ /* Add reloads for mem_phis */
+ /* BETTER: These reloads (1) should only be inserted, if they are really needed */
+ DBG((senv->dbg, LEVEL_1, "Reloads for mem-phis:\n"));
+ for(irn = pset_first(senv->mem_phis); irn; irn = pset_next(senv->mem_phis)) {
+ const ir_edge_t *e;
+ DBG((senv->dbg, LEVEL_1, " Mem-phi %+F\n", irn));
+ foreach_out_edge(irn, e) {
+ ir_node *user = e->src;
+ if (is_Phi(user) && !pset_find_ptr(senv->mem_phis, user)) {
+ ir_node *use_bl = get_nodes_block(user);
+ DBG((senv->dbg, LEVEL_1, " non-mem-phi user %+F\n", user));
+ be_add_reload_on_edge(senv, irn, use_bl, e->pos); /* (1) */
+ }
+ }
+ }
+
+ /* process each spilled node */
+ DBG((senv->dbg, LEVEL_1, "Insert spills and reloads:\n"));
+ for(si = set_first(senv->spills); si; si = set_next(senv->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(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(senv->chordal_env->main_env->node_factory,
+ senv->cls, irg, bl, mode, spill);
+
+ DBG((senv->dbg, LEVEL_1, " %+F of %+F before %+F\n", reload, si->spilled_node, rld->reloader));
+ if(reload_set)
+ pset_insert_ptr(reload_set, 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(senv->chordal_env->dom_front, si->spilled_node,
+ n_reloads, reloads, senv->mem_phis);
+ obstack_free(&ob, reloads);
+ }
+
+ obstack_free(&ob, NULL);
+
for(irn = pset_first(senv->mem_phis); irn; irn = pset_next(senv->mem_phis)) {
int i, n;
for(i = 0, n = get_irn_arity(irn); i < n; ++i)
- set_irn_n(irn, i, new_r_Bad(senv->session->irg));
+ set_irn_n(irn, i, new_r_Bad(senv->chordal_env->irg));
sched_remove(irn);
}
+
+ del_pset(senv->mem_phis);
+}
+
+void be_add_reload(spill_env_t *senv, ir_node *to_spill, ir_node *before) {
+ spill_info_t templ, *res;
+ reloader_t *rel;
+
+ templ.spilled_node = to_spill;
+ templ.reloaders = NULL;
+ res = set_insert(senv->spills, &templ, sizeof(templ), HASH_PTR(to_spill));
+
+ rel = obstack_alloc(&senv->obst, sizeof(rel[0]));
+ rel->reloader = before;
+ rel->next = res->reloaders;
+ res->reloaders = rel;
+}
+
+void be_add_reload_on_edge(spill_env_t *senv, ir_node *to_spill, ir_node *bl, int pos) {
+ ir_node *insert_bl = get_irn_arity(bl) == 1 ? sched_first(bl) : get_Block_cfgpred_block(bl, pos);
+ be_add_reload(senv, to_spill, insert_bl);
}
projects / libfirm / blobdiff