#include "bespillmorgan.h"
-#include "bechordal.h"
#include "bechordal_t.h"
#include "bespill.h"
-#include "belive.h"
#include "belive_t.h"
-#include "beinsn_t.h"
#include "irgwalk.h"
#include "besched.h"
#include "beutil.h"
-#include "beuses.h"
-#include "interval_analysis.h"
-#include "irloop.h"
#include "irloop_t.h"
-#include "irgraph.h"
#include "irgraph_t.h"
-#include "irphase.h"
#include "irphase_t.h"
#include "irprintf.h"
// maximum safe register pressure
int registers_available;
- be_insn_env_t insn_env;
spill_env_t *senv;
- be_uses_t *uses;
set *loop_attr_set;
set *block_attr_set;
return res;
}
-static int is_mem_phi(const ir_node *irn, void *data) {
- // TODO what is this for?
- return 0;
-}
-
//---------------------------------------------------------------------------
+static INLINE int consider_for_spilling(const arch_env_t *env, const arch_register_class_t *cls, const ir_node *node) {
+ if(!arch_irn_has_reg_class(env, node, -1, cls))
+ return 0;
+
+ return !(arch_irn_get_flags(env, node) & (arch_irn_flags_ignore | arch_irn_flags_dont_spill));
+}
+
/**
* Determine edges going out of a loop (= edges that go to a block that is not inside
* the loop or one of its subloops)
}
}
+static void free_loop_out_edges(morgan_env_t *env) {
+ loop_attr_t *l_attr;
+
+ for(l_attr = set_first(env->loop_attr_set); l_attr != NULL; l_attr = set_next(env->loop_attr_set)) {
+ del_set(l_attr->out_edges);
+ }
+}
+
/**
- * Construct the livethrough unused information for a block
+ * Debugging help, shows all nodes in a (node-)bitset
*/
-static bitset_t *construct_block_livethrough_unused(morgan_env_t* env, ir_node* block) {
+static void show_nodebitset(ir_graph* irg, bitset_t* bitset) {
int i;
- int node_idx;
- ir_node *irn;
- block_attr_t *block_attr = get_block_attr(env, block);
- /*
- * This is the first block in a sequence, all variables that are livethrough this block are potential
- * candidates for livethrough_unused
- */
+ bitset_foreach(bitset, i) {
+ ir_node* node = get_idx_irn(irg, i);
+ DBG((dbg, DBG_LIVE, "\t%+F\n", node));
+ }
+}
+
+/**
+ * Construct the livethrough unused set for a block
+ */
+static bitset_t *construct_block_livethrough_unused(morgan_env_t* env, ir_node* block) {
+ block_attr_t *block_attr = get_block_attr(env, block);
irn_live_t *li;
+ ir_node *node;
+ DBG((dbg, DBG_LIVE, "Processing block %d\n", get_irn_node_nr(block)));
// copy all live-outs into the livethrough_unused set
live_foreach(block, li) {
+ int node_idx;
+
if(!live_is_in(li) || !live_is_out(li))
continue;
- if(!arch_irn_consider_in_reg_alloc(env->arch, env->cls, li->irn))
+ if(!consider_for_spilling(env->arch, env->cls, li->irn))
continue;
node_idx = get_irn_idx(li->irn);
* All values that are used within the block are not unused (and therefore not
* livethrough_unused)
*/
- sched_foreach(block, irn) {
- be_insn_t *insn = be_scan_insn(&env->insn_env, irn);
+ sched_foreach(block, node) {
+ int i, arity;
- for(i = insn->use_start; i < insn->n_ops; ++i) {
- const be_operand_t *op = &insn->ops[i];
- int idx = get_irn_idx(op->irn);
+ for(i = 0, arity = get_irn_arity(node); i < arity; ++i) {
+ int idx = get_irn_idx(get_irn_n(node, i));
bitset_clear(block_attr->livethrough_unused, idx);
}
}
+ show_nodebitset(env->irg, block_attr->livethrough_unused);
return block_attr->livethrough_unused;
}
/**
- * Debugging help, shows all nodes in a (node-)bitset
+ * Construct the livethrough unused set for a loop (and all its subloops+blocks)
*/
-static void show_nodebitset(ir_graph* irg, bitset_t* bitset) {
- int i;
-
- bitset_foreach(bitset, i) {
- ir_node* node = get_idx_irn(irg, i);
- DBG((dbg, DBG_LIVE, "\t%+F\n", node));
- }
-}
-
static bitset_t *construct_loop_livethrough_unused(morgan_env_t *env, ir_loop *loop) {
int i;
loop_attr_t* loop_attr = get_loop_attr(env, loop);
break;
}
}
+ DBG((dbg, DBG_LIVE, "Done with loop %d\n", loop->loop_nr));
// remove all unused livethroughs that are remembered for this loop from child loops and blocks
for(i = 0; i < get_loop_n_elements(loop); ++i) {
*/
sched_foreach_reverse(block, irn) {
// do we need more spills than possible with unused libethroughs?
- int spills_needed = pressure - unused_spills_possible - env->registers_available;
+ int spills_needed = pressure - env->registers_available - unused_spills_possible;
if(spills_needed > 0) {
DBG((dbg, DBG_PRESSURE, "\tWARNING %d more spills needed at %+F\n", spills_needed, irn));
// TODO further spills needed
break;
// update pressure
- {
- int pressure_old = pressure;
- be_liveness_transfer(env->arch, env->cls, irn, live_nodes);
- pressure = pset_count(live_nodes);
- DBG((dbg, DBG_PRESSURE, "\tPressure at %+F - before: %d after: %d\n", irn, pressure_old, pressure));
- }
+ be_liveness_transfer(env->arch, env->cls, irn, live_nodes);
+ pressure = pset_count(live_nodes);
}
+ DBG((dbg, DBG_PRESSURE, "\tMax Pressure in %+F: %d\n", block, max_pressure));
+
/*
* Calculate number of spills from loop_unused_spills_possible that we want to use,
* and spill unused livethroughs from the block if we still don't have enough registers
DBG((dbg, DBG_PRESSURE, "Spilling node %+F around block %+F\n", to_spill, block));
be_add_reload_on_edge(env->senv, to_spill, edge->src, edge->pos);
}
+ spills++;
}
} else {
loop_unused_spills_needed = spills_needed;
env.arch = chordal_env->birg->main_env->arch_env;
env.irg = chordal_env->irg;
env.cls = chordal_env->cls;
- env.senv = be_new_spill_env(chordal_env, is_mem_phi, NULL);
+ env.senv = be_new_spill_env(chordal_env);
DEBUG_ONLY(be_set_spill_env_dbg_module(env.senv, dbg);)
- env.uses = be_begin_uses(env.irg, env.arch, env.cls);
phase_init(&env.phase, "spillmorgan", env.irg, PHASE_DEFAULT_GROWTH, init_phase_data);
env.registers_available = arch_count_non_ignore_regs(env.arch, env.cls);
- be_insn_env_init(&env.insn_env, chordal_env->birg, chordal_env->cls, &env.phase.obst);
-
env.loop_attr_set = new_set(loop_attr_cmp, 5);
env.block_attr_set = new_set(block_attr_cmp, 20);
reduce_register_pressure_in_loop(&env, get_irg_loop(env.irg), 0);
be_insert_spills_reloads(env.senv);
- assert(be_verify_schedule(env.irg));
+ if (chordal_env->opts->vrfy_option == BE_CH_VRFY_WARN) {
+ be_verify_schedule(env.irg);
+ } else if (chordal_env->opts->vrfy_option == BE_CH_VRFY_ASSERT) {
+ assert(be_verify_schedule(env.irg));
+ }
+
+ // we have to remove dead nodes from schedule to not confuse liveness calculation
+ be_remove_dead_nodes_from_schedule(env.irg);
// cleanup
- be_end_uses(env.uses);
- be_dump(env.irg, "-spillmorgan", dump_ir_block_graph_sched);
+ if (chordal_env->opts->dump_flags & BE_CH_DUMP_SPILL)
+ be_dump(env.irg, "-spillmorgan", dump_ir_block_graph_sched);
+
+ free_loop_out_edges(&env);
del_set(env.loop_attr_set);
del_set(env.block_attr_set);
// fix the remaining places with too high register pressure with beladies algorithm
- be_remove_dead_nodes_from_schedule(env.irg);
be_liveness(env.irg);
be_spill_belady_spill_env(chordal_env, env.senv);
projects / libfirm / blobdiff