/**
- * 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.
#include "pset.h"
#include "irnode_t.h"
#include "ircons_t.h"
+#include "debug.h"
#include "besched.h"
#include "bespill.h"
#include "benode_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 *user; /**< The node this spill is for. */
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_main_session_env_t *session;
+ struct obstack obst;
+ set *spill_ctxs;
+ set *spills; /**< all spill_info_t's, which must be placed */
+};
+
+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_main_session_env_t *session, const arch_register_class_t *cls) {
+ spill_env_t *env = malloc(sizeof(env[0]));
+ env->spill_ctxs = new_set(cmp_spillctx, 1024);
+ env->spills = new_set(cmp_spillinfo, 1024);
+ env->session = session;
+ env->cls = cls;
+ env->dbg = dbg;
+ 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, "spill_irn %+F\n", irn));
ctx = be_get_spill_ctx(senv->spill_ctxs, irn, ctx_irn);
if(!ctx->spill) {
* Thus we spill it and all its operands to the same spill slot.
* Therefore the phi/dataB becomes a phi/Memory
*/
-static ir_node *be_spill_phi(spill_env_t *senv, ir_node *phi, ir_node *ctx_irn) {
+static ir_node *be_spill_phi(spill_env_t *senv, ir_node *phi, ir_node *ctx_irn,
+ pset *mem_phis) {
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->session->irg;
spill_ctx_t *ctx;
assert(is_Phi(phi));
-// DBG((dbg, DBG_SPILL, "spill_phi %+F\n", phi));
+ DBG((senv->dbg, LEVEL_1, "spill_phi %+F\n", phi));
/* search an existing spill for this context */
ctx = be_get_spill_ctx(senv->spill_ctxs, phi, ctx_irn);
ir_node *arg = get_irn_n(phi, i);
ir_node *sub_res;
- if(is_Phi(arg) && pset_find_ptr(senv->mem_phis, arg))
- sub_res = be_spill_phi(senv, arg, ctx_irn);
+ if(is_Phi(arg) && pset_find_ptr(mem_phis, arg))
+ sub_res = be_spill_phi(senv, arg, ctx_irn, mem_phis);
else
sub_res = be_spill_irn(senv, arg, ctx_irn);
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, pset *mem_phis) {
ir_node *res;
- if (pset_find_ptr(senv->mem_phis, to_spill))
- res = be_spill_phi(senv, to_spill, to_spill);
+ if (pset_find_ptr(mem_phis, to_spill))
+ res = be_spill_phi(senv, to_spill, to_spill, mem_phis);
else
res = be_spill_irn(senv, to_spill, to_spill);
return res;
}
-void be_remove_spilled_phis(spill_env_t *senv) {
+void be_insert_spills_reloads(spill_env_t *senv, pset *reload_set, decide_irn_t is_mem_phi, void *data) {
+ ir_graph *irg = senv->session->irg;
ir_node *irn;
- /* remove all special phis form the irg and the schedule */
- for(irn = pset_first(senv->mem_phis); irn; irn = pset_next(senv->mem_phis)) {
+ spill_info_t *si;
+ struct obstack ob;
+ pset *mem_phis = pset_new_ptr_default();
+
+ obstack_init(&ob);
+
+ /* get all special spilled phis */
+ for(si = set_first(senv->spills); si; si = set_next(senv->spills)) {
+ irn = si->spilled_node;
+ if (is_Phi(irn) && is_mem_phi(irn, data))
+ pset_insert_ptr(mem_phis, irn);
+ }
+
+ /* process each spilled node */
+ 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, mem_phis);
+
+ /* the reload */
+ ir_node *bl = is_Block(rld->reloader) ? rld->reloader : get_nodes_block(rld->reloader);
+ ir_node *reload = new_Reload(senv->session->main_env->node_factory,
+ senv->cls, irg, bl, mode, spill);
+
+ DBG((senv->dbg, LEVEL_2, " RELOADER %+F Reload %+F of %+F\n",
+ rld->reloader, reload, si->spilled_node));
+ 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->session->dom_front, si->spilled_node,
+ n_reloads, reloads, mem_phis);
+ obstack_free(&ob, reloads);
+ }
+
+ obstack_free(&ob, NULL);
+
+ for(irn = pset_first(mem_phis); irn; irn = pset_next(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));
sched_remove(irn);
}
+
+ del_pset(mem_phis);
+}
+
+void be_add_spill(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_spill_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_spill(senv, to_spill, insert_bl);
}