#include "bearch.h"
#include "be_t.h"
#include "benode.h"
-#include "beirg.h"
#include "belive.h"
DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
static double get_spill_costs(ir_node *node)
{
- const ir_edge_t *edge;
- ir_node *spill_place = skip_Proj(node);
- double costs = be_get_spill_costs(spill_env, node,
- spill_place);
+ ir_node *spill_place = skip_Proj(node);
+ double costs = be_get_spill_costs(spill_env, node, spill_place);
foreach_out_edge(node, edge) {
ir_node *use = get_edge_src_irn(edge);
*/
static void spill_node(ir_node *node)
{
- const ir_edge_t *edge;
-
DBG((dbg, LEVEL_3, "\tspilling %+F\n", node));
foreach_out_edge(node, edge) {
continue;
if (is_Phi(use)) {
- int in = get_edge_src_pos(edge);
- ir_node *block = get_nodes_block(use);
+ int in = get_edge_src_pos(edge);
+ ir_node *block = get_nodes_block(use);
be_add_reload_on_edge(spill_env, node, block, in, cls, 1);
} else {
*/
static void do_spilling(ir_nodeset_t *live_nodes, ir_node *node)
{
- size_t n_live_nodes = ir_nodeset_size(live_nodes);
- size_t values_defined = 0;
- size_t free_regs_needed = 0;
- spill_candidate_t *candidates;
- ir_nodeset_iterator_t iter;
- int i, arity;
- size_t c;
- int spills_needed;
- size_t cand_idx;
- ir_node *n;
- ir_node *value;
-
+ size_t values_defined = 0;
be_foreach_definition(node, cls, value,
+ (void)value;
assert(req_->width >= 1);
values_defined += req_->width;
);
/* we need registers for the non-live argument values */
- arity = get_irn_arity(node);
- for (i = 0; i < arity; ++i) {
- ir_node *pred = get_irn_n(node, i);
- if (arch_irn_consider_in_reg_alloc(cls, pred)
- && !ir_nodeset_contains(live_nodes, pred)) {
- free_regs_needed += get_value_width(pred);
+ size_t free_regs_needed = 0;
+ be_foreach_use(node, cls, in_req_, use, pred_req_,
+ if (!ir_nodeset_contains(live_nodes, use)) {
+ free_regs_needed += get_value_width(use);
}
- }
+ );
/* we can reuse all reloaded values for the defined values, but we might
* need even more registers */
if (values_defined > free_regs_needed)
free_regs_needed = values_defined;
- spills_needed = (n_live_nodes + free_regs_needed) - n_regs;
+ size_t n_live_nodes = ir_nodeset_size(live_nodes);
+ int spills_needed = (n_live_nodes + free_regs_needed) - n_regs;
if (spills_needed <= 0)
return;
DBG((dbg, LEVEL_2, "\tspills needed after %+F: %d\n", node, spills_needed));
- candidates = ALLOCAN(spill_candidate_t, n_live_nodes);
+ spill_candidate_t *candidates = ALLOCAN(spill_candidate_t, n_live_nodes);
/* construct array with spill candidates and calculate their costs */
- c = 0;
+ size_t c = 0;
foreach_ir_nodeset(live_nodes, n, iter) {
spill_candidate_t *candidate = & candidates[c];
compare_spill_candidates_desc);
/* spill cheapest ones */
- cand_idx = 0;
+ size_t cand_idx = 0;
while (spills_needed > 0) {
- bool is_use = false;
- spill_candidate_t *candidate;
- ir_node *cand_node;
-
if (cand_idx >= n_live_nodes) {
panic("can't spill enough values for node %+F", node);
}
- candidate = &candidates[cand_idx];
- cand_node = candidate->node;
+ spill_candidate_t *candidate = &candidates[cand_idx];
+ ir_node *cand_node = candidate->node;
++cand_idx;
if (arch_irn_is(skip_Proj_const(cand_node), dont_spill))
continue;
/* make sure the node is not an argument of the instruction */
- for (i = 0; i < arity; ++i) {
+ bool is_use = false;
+ int arity = get_irn_arity(node);
+ for (int i = 0; i < arity; ++i) {
ir_node *in = get_irn_n(node, i);
if (in == cand_node) {
is_use = true;
*/
static void remove_defs(ir_node *node, ir_nodeset_t *nodeset)
{
- ir_node *value;
/* You must break out of your loop when hitting the first phi function. */
assert(!is_Phi(node));
static void add_uses(ir_node *node, ir_nodeset_t *nodeset)
{
- int i, arity;
-
- arity = get_irn_arity(node);
- for (i = 0; i < arity; ++i) {
+ int arity = get_irn_arity(node);
+ for (int i = 0; i < arity; ++i) {
ir_node *op = get_irn_n(node, i);
if (arch_irn_consider_in_reg_alloc(cls, op) &&
static __attribute__((unused))
void print_nodeset(ir_nodeset_t *nodeset)
{
- ir_nodeset_iterator_t iter;
- ir_node *node;
-
foreach_ir_nodeset(nodeset, node, iter) {
ir_fprintf(stderr, "%+F ", node);
}
*/
static void spill_block(ir_node *block, void *data)
{
- ir_nodeset_t live_nodes;
- ir_nodeset_iterator_t iter;
- ir_node *node;
- int n_phi_values_spilled;
- int regpressure;
- int live_nodes_pressure;
- int phi_spills_needed;
(void) data;
-
DBG((dbg, LEVEL_1, "spilling block %+F\n", block));
/* construct set of live nodes at end of block */
+ ir_nodeset_t live_nodes;
ir_nodeset_init(&live_nodes);
be_liveness_end_of_block(lv, cls, block, &live_nodes);
/* until now only the values of some phis have been spilled the phis itself
* are still there and occupy registers, so we need to count them and might
* have to spill some of them. */
- n_phi_values_spilled = 0;
+ int n_phi_values_spilled = 0;
sched_foreach(block, node) {
if (!is_Phi(node))
break;
}
}
- live_nodes_pressure = 0;
+ int live_nodes_pressure = 0;
foreach_ir_nodeset(&live_nodes, node, iter) {
live_nodes_pressure += get_value_width(node);
}
/* calculate how many of the phis need to be spilled */
- regpressure = live_nodes_pressure + n_phi_values_spilled;
- phi_spills_needed = regpressure - n_regs;
+ int regpressure = live_nodes_pressure + n_phi_values_spilled;
+ int phi_spills_needed = regpressure - n_regs;
DBG((dbg, LEVEL_3, "Regpressure before phis: %d phispills: %d\n",
regpressure, phi_spills_needed));
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