/*
- * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
* @date 14.12.2005
* @version $Id$
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
#include <stdlib.h>
#include "irgmod.h"
#include "iredges_t.h"
#include "irgwalk.h"
+#include "array_t.h"
#include "bearch_t.h"
#include "belower.h"
#include "besched_t.h"
#include "bestat.h"
#include "bessaconstr.h"
-#include "benodesets.h"
#include "beintlive_t.h"
#undef KEEP_ALIVE_COPYKEEP_HACK
-/* associates op with it's copy and CopyKeep */
+/** Associates an op with it's copy and CopyKeep. */
typedef struct {
- ir_node *op; /* an irn which must be different */
- ir_nodeset_t copies; /* all non-spillable copies of this irn */
+ ir_node *op; /**< an irn which must be different */
+ ir_nodeset_t copies; /**< all non-spillable copies of this irn */
const arch_register_class_t *cls;
} op_copy_assoc_t;
-/* environment for constraints */
+/** Environment for constraints. */
typedef struct {
be_irg_t *birg;
pset *op_set;
DEBUG_ONLY(firm_dbg_module_t *dbg;)
} constraint_env_t;
-/* lowering walker environment */
+/** Lowering walker environment. */
typedef struct _lower_env_t {
be_irg_t *birg;
- const arch_env_t *arch_env;
unsigned do_copy : 1;
DEBUG_ONLY(firm_dbg_module_t *dbg_module;)
} lower_env_t;
-/* holds a perm register pair */
+/** Holds a Perm register pair. */
typedef struct _reg_pair_t {
const arch_register_t *in_reg; /**< a perm IN register */
ir_node *in_node; /**< the in node to which the register belongs */
PERM_COPY
} perm_type_t;
-/* structure to represent cycles or chains in a perm */
+/** Structure to represent cycles or chains in a Perm. */
typedef struct _perm_cycle_t {
const arch_register_t **elems; /**< the registers in the cycle */
int n_elems; /**< number of elements in the cycle */
perm_type_t type; /**< type (CHAIN or CYCLE) */
} perm_cycle_t;
-//
-/* Compare the two operands */
+/** Compare the two operands. */
static int cmp_op_copy_assoc(const void *a, const void *b) {
const op_copy_assoc_t *op1 = a;
const op_copy_assoc_t *op2 = b;
return op1->op != op2->op;
}
-/* Compare the in registers of two register pairs */
+/** Compare the in registers of two register pairs. */
static int compare_reg_pair(const void *a, const void *b) {
const reg_pair_t *pair_a = a;
const reg_pair_t *pair_b = b;
return -1;
}
-/* returns the number register pairs marked as checked */
+/** returns the number register pairs marked as checked. */
static int get_n_checked_pairs(reg_pair_t *pairs, int n) {
int i, n_checked = 0;
if (in_out) {
for (i = 0; i < n; i++) {
/* out register matches */
- if (pairs[i].out_reg->index == reg_idx)
+ if ((int) pairs[i].out_reg->index == reg_idx)
return i;
}
}
else {
for (i = 0; i < n; i++) {
/* in register matches */
- if (pairs[i].in_reg->index == reg_idx)
+ if ((int) pairs[i].in_reg->index == reg_idx)
return i;
}
}
}
/* assume worst case: all remaining pairs build a cycle or chain */
- cycle->elems = xcalloc((n - n_pairs_done) * 2, sizeof(cycle->elems[0]));
+ cycle->elems = XMALLOCNZ(const arch_register_t*, (n - n_pairs_done) * 2);
cycle->n_elems = 2; /* initial number of elements is 2 */
cycle->elems[0] = pairs[start].in_reg;
cycle->elems[1] = pairs[start].out_reg;
static void lower_perm_node(ir_node *irn, void *walk_env) {
ir_graph *irg = get_irn_irg(irn);
const arch_register_class_t *reg_class;
- const arch_env_t *arch_env;
lower_env_t *env = walk_env;
int real_size = 0;
int keep_perm = 0;
int n, i, pn, do_copy, j, n_ops;
reg_pair_t *pairs;
const ir_edge_t *edge;
- perm_cycle_t *cycle;
ir_node *sched_point, *block, *in[2];
ir_node *arg1, *arg2, *res1, *res2;
ir_node *cpyxchg = NULL;
DEBUG_ONLY(firm_dbg_module_t *mod;)
- arch_env = env->arch_env;
do_copy = env->do_copy;
DEBUG_ONLY(mod = env->dbg_module;)
block = get_nodes_block(irn);
should be ok.
*/
sched_point = sched_prev(irn);
+ DBG((mod, LEVEL_1, "perm: %+F\n", irn));
DBG((mod, LEVEL_1, "sched point is %+F\n", sched_point));
assert(sched_point && "Perm is not scheduled or has no predecessor");
n = get_irn_arity(irn);
assert(n == get_irn_n_edges(irn) && "perm's in and out numbers different");
- reg_class = arch_get_irn_register(arch_env, get_irn_n(irn, 0))->reg_class;
+ reg_class = arch_get_irn_register(get_irn_n(irn, 0))->reg_class;
pairs = alloca(n * sizeof(pairs[0]));
/* build the list of register pairs (in, out) */
pn = get_Proj_proj(pairs[i].out_node);
pairs[i].in_node = get_irn_n(irn, pn);
- pairs[i].in_reg = arch_get_irn_register(arch_env, pairs[i].in_node);
- pairs[i].out_reg = arch_get_irn_register(arch_env, pairs[i].out_node);
+ pairs[i].in_reg = arch_get_irn_register(pairs[i].in_node);
+ pairs[i].out_reg = arch_get_irn_register(pairs[i].out_node);
pairs[i].checked = 0;
i++;
set_Proj_proj(pairs[i].out_node, get_Proj_proj(pairs[i].in_node));
}
-#ifdef SCHEDULE_PROJS
- /* remove the proj from the schedule */
- sched_remove(pairs[i].out_node);
-#endif
-
/* reroute the edges from the proj to the argument */
exchange(pairs[i].out_node, pairs[i].in_node);
//edges_reroute(pairs[i].out_node, pairs[i].in_node, env->birg->irg);
real_size = n - get_n_checked_pairs(pairs, n);
- be_do_stat_perm(reg_class->name, reg_class->n_regs, irn, block, n, real_size);
-
/* check for cycles and chains */
while (get_n_checked_pairs(pairs, n) < n) {
+ perm_cycle_t *cycle;
+
i = n_ops = 0;
/* go to the first not-checked pair */
while (pairs[i].checked) i++;
- cycle = xcalloc(1, sizeof(*cycle));
+ cycle = XMALLOCZ(perm_cycle_t);
cycle = get_perm_cycle(cycle, pairs, n, i);
DB((mod, LEVEL_1, "%+F: following %s created:\n ", irn, cycle->type == PERM_CHAIN ? "chain" : "cycle"));
/* set as in for next Perm */
pairs[pidx].in_node = res1;
}
- else {
-#ifdef SCHEDULE_PROJS
- sched_remove(res1);
-#endif
- }
-
-#ifdef SCHEDULE_PROJS
- sched_remove(res2);
-#endif
set_Proj_pred(res2, cpyxchg);
set_Proj_proj(res2, 0);
set_Proj_pred(res1, cpyxchg);
set_Proj_proj(res1, 1);
-#ifdef SCHEDULE_PROJS
- sched_add_after(sched_point, res1);
- sched_add_after(sched_point, res2);
-#endif
- arch_set_irn_register(arch_env, res2, cycle->elems[i + 1]);
- arch_set_irn_register(arch_env, res1, cycle->elems[i]);
+ arch_set_irn_register(res2, cycle->elems[i + 1]);
+ arch_set_irn_register(res1, cycle->elems[i]);
/* insert the copy/exchange node in schedule after the magic schedule node (see above) */
sched_add_after(sched_point, cpyxchg);
irn, arg1, cycle->elems[i]->name, res2, cycle->elems[i + 1]->name));
cpyxchg = be_new_Copy(reg_class, irg, block, arg1);
- arch_set_irn_register(arch_env, cpyxchg, cycle->elems[i + 1]);
+ arch_set_irn_register(cpyxchg, cycle->elems[i + 1]);
n_ops++;
-#ifdef SCHEDULE_PROJS
- /* remove the proj from the schedule */
- sched_remove(res2);
-#endif
/* exchange copy node and proj */
exchange(res2, cpyxchg);
}
}
- be_do_stat_permcycle(reg_class->name, irn, block, cycle->type == PERM_CHAIN, cycle->n_elems, n_ops);
-
free((void *) cycle->elems);
free(cycle);
}
/* remove the perm from schedule */
if (! keep_perm) {
sched_remove(irn);
- be_kill_node(irn);
+ kill_node(irn);
}
}
-static int get_n_out_edges(const ir_node *irn) {
- const ir_edge_t *edge;
- int cnt = 0;
-
- foreach_out_edge(irn, edge) {
- cnt++;
- }
-
- return cnt;
+static int has_irn_users(const ir_node *irn) {
+ return get_irn_out_edge_first_kind(irn, EDGE_KIND_NORMAL) != 0;
}
+/**
+ * Skip all Proj nodes.
+ */
static INLINE ir_node *belower_skip_proj(ir_node *irn) {
while(is_Proj(irn))
irn = get_Proj_pred(irn);
return irn;
}
-static ir_node *find_copy(constraint_env_t *env, ir_node *irn, ir_node *op) {
- const arch_env_t *arch_env = be_get_birg_arch_env(env->birg);
- ir_node *block = get_nodes_block(irn);
- ir_node *cur_node;
+static ir_node *find_copy(ir_node *irn, ir_node *op)
+{
+ ir_node *block = get_nodes_block(irn);
+ ir_node *cur_node;
for (cur_node = sched_prev(irn);
! is_Block(cur_node) && be_is_Copy(cur_node) && get_nodes_block(cur_node) == block;
cur_node = sched_prev(cur_node))
{
- if (be_get_Copy_op(cur_node) == op && arch_irn_is(arch_env, cur_node, dont_spill))
+ if (be_get_Copy_op(cur_node) == op && arch_irn_is(cur_node, dont_spill))
return cur_node;
}
be_irg_t *birg = env->birg;
ir_graph *irg = be_get_birg_irg(birg);
pset *op_set = env->op_set;
- const arch_env_t *arch_env = be_get_birg_arch_env(birg);
ir_node *block = get_nodes_block(irn);
- const arch_register_class_t *cls = arch_get_irn_reg_class(arch_env, other_different, -1);
+ const arch_register_class_t *cls = arch_get_irn_reg_class(other_different, -1);
ir_node *in[2], *keep, *cpy;
op_copy_assoc_t key, *entry;
DEBUG_ONLY(firm_dbg_module_t *mod = env->dbg;)
- if (arch_irn_is(arch_env, other_different, ignore) || ! mode_is_datab(get_irn_mode(other_different))) {
+ if (arch_irn_is(other_different, ignore) ||
+ !mode_is_datab(get_irn_mode(other_different))) {
DBG((mod, LEVEL_1, "ignore constraint for %+F because other_irn is ignore or not a datab node\n", irn));
return;
}
/* in block far far away */
/* The copy is optimized later if not needed */
- /* check if already exists such a copy in the schedule immediatly before */
- cpy = find_copy(env, belower_skip_proj(irn), other_different);
+ /* check if already exists such a copy in the schedule immediately before */
+ cpy = find_copy(belower_skip_proj(irn), other_different);
if (! cpy) {
cpy = be_new_Copy(cls, irg, block, other_different);
be_node_set_flags(cpy, BE_OUT_POS(0), arch_irn_flags_dont_spill);
/* Add the Keep resp. CopyKeep and reroute the users */
/* of the other_different irn in case of CopyKeep. */
- if (get_n_out_edges(other_different) == 0) {
- keep = be_new_Keep(cls, irg, block, 2, in);
- }
- else {
+ if (has_irn_users(other_different)) {
keep = be_new_CopyKeep_single(cls, irg, block, cpy, irn, get_irn_mode(other_different));
be_node_set_reg_class(keep, 1, cls);
}
+ else {
+ keep = be_new_Keep(cls, irg, block, 2, in);
+ }
DBG((mod, LEVEL_1, "created %+F(%+F, %+F)\n\n", keep, irn, cpy));
sched_add_after(irn, keep);
/* insert the other different and it's copies into the set */
- key.op = other_different;
- entry = pset_find(op_set, &key, nodeset_hash(other_different));
+ key.op = other_different;
+ entry = pset_find(op_set, &key, hash_irn(other_different));
if (! entry) {
entry = obstack_alloc(&env->obst, sizeof(*entry));
ir_nodeset_insert(&entry->copies, keep);
}
- pset_insert(op_set, entry, nodeset_hash(other_different));
+ pset_insert(op_set, entry, hash_irn(other_different));
}
/**
- * Checks if node has a should_be_different constraint in output
- * and adds a Keep then to assure the constraint.
+ * Checks if node has a must_be_different constraint in output and adds a Keep
+ * then to assure the constraint.
*/
static void assure_different_constraints(ir_node *irn, constraint_env_t *env) {
- const arch_register_req_t *req;
- const arch_env_t *arch_env = be_get_birg_arch_env(env->birg);
-
- req = arch_get_register_req(arch_env, irn, -1);
-
- if (arch_register_req_is(req, should_be_different)) {
- ir_node *different_from = get_irn_n(belower_skip_proj(irn), req->other_different);
- gen_assure_different_pattern(irn, different_from, env);
- } else if (arch_register_req_is(req, should_be_different_from_all)) {
- int i, n = get_irn_arity(belower_skip_proj(irn));
- for (i = 0; i < n; i++) {
- gen_assure_different_pattern(irn, get_irn_n(belower_skip_proj(irn), i), env);
+ ir_node *skipped_irn = belower_skip_proj(irn);
+ const arch_register_req_t *req = arch_get_register_req(irn, -1);
+
+ if (arch_register_req_is(req, must_be_different)) {
+ const unsigned other = req->other_different;
+ int i;
+
+ if (arch_register_req_is(req, should_be_same)) {
+ const unsigned same = req->other_same;
+
+ if (is_po2(other) && is_po2(same)) {
+ int idx_other = ntz(other);
+ int idx_same = ntz(same);
+
+ /*
+ * We can safely ignore a should_be_same x must_be_different y
+ * IFF both inputs are equal!
+ */
+ if (get_irn_n(skipped_irn, idx_other) == get_irn_n(skipped_irn, idx_same)) {
+ return;
+ }
+ }
+ }
+ for (i = 0; 1U << i <= other; ++i) {
+ if (other & (1U << i)) {
+ ir_node *different_from = get_irn_n(skipped_irn, i);
+ gen_assure_different_pattern(irn, different_from, env);
+ }
}
}
}
-
-
/**
* Calls the functions to assure register constraints.
*
if (sched_is_scheduled(irn) && mode_is_datab(get_irn_mode(irn)))
assure_different_constraints(irn, walk_env);
-
- return;
}
/**
/* now, we can kill the melted keep, except the */
/* ref one, we still need some information */
if (melt_arr[j] != ref)
- be_kill_node(melt_arr[j]);
+ kill_node(melt_arr[j]);
}
#ifdef KEEP_ALIVE_COPYKEEP_HACK
new_ck = be_new_CopyKeep(entry->cls, irg, get_nodes_block(ref), be_get_CopyKeep_op(ref), n_melt, new_ck_in, get_irn_mode(ref));
#endif /* KEEP_ALIVE_COPYKEEP_HACK */
- /* set register class for all keeped inputs */
+ /* set register class for all kept inputs */
for (j = 1; j <= n_melt; ++j)
be_node_set_reg_class(new_ck, j, entry->cls);
ir_nodeset_insert(&entry->copies, new_ck);
/* find scheduling point */
- if (get_irn_mode(ref_mode_T) == mode_T) {
- /* walk along the Projs */
- for (sched_pt = sched_next(ref_mode_T); is_Proj(sched_pt) || be_is_Keep(sched_pt) || be_is_CopyKeep(sched_pt); sched_pt = sched_next(sched_pt))
- /* just walk along the schedule until a non-Proj/Keep/CopyKeep node is found*/ ;
- }
- else {
- sched_pt = ref_mode_T;
- }
+ sched_pt = ref_mode_T;
+ do {
+ /* just walk along the schedule until a non-Keep/CopyKeep node is found */
+ sched_pt = sched_next(sched_pt);
+ } while (be_is_Keep(sched_pt) || be_is_CopyKeep(sched_pt));
sched_add_before(sched_pt, new_ck);
DBG((cenv->dbg, LEVEL_1, "created %+F, scheduled before %+F\n", new_ck, sched_pt));
/* finally: kill the reference copykeep */
- be_kill_node(ref);
+ kill_node(ref);
}
}
*/
void assure_constraints(be_irg_t *birg) {
ir_graph *irg = be_get_birg_irg(birg);
- const arch_env_t *arch_env = be_get_birg_arch_env(birg);
constraint_env_t cenv;
op_copy_assoc_t *entry;
ir_node **nodes;
FIRM_DBG_REGISTER(firm_dbg_module_t *mod, "firm.be.lower.constr");
- be_assure_dom_front(birg);
-
DEBUG_ONLY(cenv.dbg = mod;)
cenv.birg = birg;
cenv.op_set = new_pset(cmp_op_copy_assoc, 16);
ir_node *keep;
int n = get_irn_arity(cp);
- keep = be_new_Keep(arch_get_irn_reg_class(arch_env, cp, -1),
- irg, get_nodes_block(cp), n, (ir_node **)&get_irn_in(cp)[1]);
+ keep = be_new_Keep(arch_get_irn_reg_class(cp, -1),
+ irg, get_nodes_block(cp), n, get_irn_in(cp) + 1);
sched_add_before(cp, keep);
/* Set all ins (including the block) of the CopyKeep BAD to keep the verifier happy. */
sched_remove(cp);
- be_kill_node(cp);
+ kill_node(cp);
}
}
*/
static int push_through_perm(ir_node *perm, void *data)
{
- lower_env_t *env = data;
- const arch_env_t *aenv = env->arch_env;
+ lower_env_t *env = data;
ir_graph *irg = get_irn_irg(perm);
ir_node *bl = get_nodes_block(perm);
- int n = get_irn_arity(perm);
- int *map = alloca(n * sizeof(map[0]));
- ir_node **projs = alloca(n * sizeof(projs[0]));
- bitset_t *keep = bitset_alloca(n);
- ir_node *frontier = sched_first(bl);
+ ir_node *node;
+ int arity = get_irn_arity(perm);
+ int *map;
+ int *proj_map;
+ bitset_t *moved = bitset_alloca(arity);
+ int n_moved;
+ int new_size;
+ ir_node *frontier = bl;
FIRM_DBG_REGISTER(firm_dbg_module_t *mod, "firm.be.lower.permmove");
- int i, new_size, n_keep;
+ int i, n;
const ir_edge_t *edge;
- ir_node *last_proj, *irn;
- const arch_register_class_t *cls;
+ ir_node *one_proj = NULL, *irn;
+ const arch_register_class_t *cls = NULL;
DBG((mod, LEVEL_1, "perm move %+F irg %+F\n", perm, irg));
- /* get some proj and find out the register class of the proj. */
- foreach_out_edge (perm, edge) {
- last_proj = get_edge_src_irn(edge);
- cls = arch_get_irn_reg_class(aenv, last_proj, -1);
- assert(is_Proj(last_proj));
- break;
- }
+ /* get some Proj and find out the register class of that Proj. */
+ edge = get_irn_out_edge_first_kind(perm, EDGE_KIND_NORMAL);
+ one_proj = get_edge_src_irn(edge);
+ assert(is_Proj(one_proj));
+ cls = arch_get_irn_reg_class(one_proj, -1);
- /* find the point in the schedule after which the
+ /* Find the point in the schedule after which the
* potentially movable nodes must be defined.
- * A perm will only be pushed up to first instruction
- * which lets an operand of itself die. */
-
+ * A Perm will only be pushed up to first instruction
+ * which lets an operand of itself die.
+ * If we would allow to move the Perm above this instruction,
+ * the former dead operand would be live now at the point of
+ * the Perm, increasing the register pressure by one.
+ */
sched_foreach_reverse_from (sched_prev(perm), irn) {
- for(i = get_irn_arity(irn) - 1; i >= 0; --i) {
+ for (i = get_irn_arity(irn) - 1; i >= 0; --i) {
ir_node *op = get_irn_n(irn, i);
- if(arch_irn_consider_in_reg_alloc(aenv, cls, op)
- && !values_interfere(env->birg, op, last_proj)) {
- frontier = sched_next(irn);
+ if (arch_irn_consider_in_reg_alloc(cls, op) &&
+ !values_interfere(env->birg, op, one_proj)) {
+ frontier = irn;
goto found_front;
}
}
DBG((mod, LEVEL_2, "\tfrontier: %+F\n", frontier));
- foreach_out_edge (perm, edge) {
- ir_node *proj = get_edge_src_irn(edge);
- int nr = get_Proj_proj(proj);
- ir_node *op = get_irn_n(perm, nr);
-
- assert(nr < n);
-
- /* we will need the last Proj as an insertion point
- * for the instruction(s) pushed through the Perm */
- if (sched_comes_after(last_proj, proj))
- last_proj = proj;
-
- projs[nr] = proj;
-
- bitset_set(keep, nr);
- if (!is_Proj(op) && get_nodes_block(op) == bl
- && (op == frontier || sched_comes_after(frontier, op))) {
- for (i = get_irn_arity(op) - 1; i >= 0; --i) {
- ir_node *opop = get_irn_n(op, i);
- if (!arch_irn_consider_in_reg_alloc(aenv, cls, opop)) {
- bitset_clear(keep, nr);
- break;
- }
+ node = sched_prev(perm);
+ n_moved = 0;
+ while(!sched_is_begin(node)) {
+ const arch_register_req_t *req;
+ int input = -1;
+ ir_node *proj;
+
+ /* search if node is a INPUT of Perm */
+ foreach_out_edge(perm, edge) {
+ ir_node *out = get_edge_src_irn(edge);
+ int pn = get_Proj_proj(out);
+ ir_node *in = get_irn_n(perm, pn);
+ if (node == in) {
+ proj = out;
+ input = pn;
+ break;
}
}
- }
-
- n_keep = bitset_popcnt(keep);
-
- /* well, we could not push enything through the perm */
- if (n_keep == n)
- return 1;
-
- assert(is_Proj(last_proj));
-
- DBG((mod, LEVEL_2, "\tkeep: %d, total: %d, mask: %b\n", n_keep, n, keep));
- last_proj = sched_next(last_proj);
- for (new_size = 0, i = 0; i < n; ++i) {
- ir_node *proj = projs[i];
-
- if (bitset_is_set(keep, i)) {
- map[i] = new_size++;
- set_Proj_proj(proj, map[i]);
- DBG((mod, LEVEL_1, "\targ %d remap to %d\n", i, map[i]));
+ /* it wasn't an input to the perm, we can't do anything more */
+ if(input < 0)
+ break;
+ if(!sched_comes_after(frontier, node))
+ break;
+ if (arch_irn_is(node, modify_flags))
+ break;
+ if(is_Proj(node)) {
+ req = arch_get_register_req(get_Proj_pred(node),
+ -1 - get_Proj_proj(node));
+ } else {
+ req = arch_get_register_req(node, -1);
+ }
+ if(req->type != arch_register_req_type_normal)
+ break;
+ for(i = get_irn_arity(node) - 1; i >= 0; --i) {
+ ir_node *opop = get_irn_n(node, i);
+ if (arch_irn_consider_in_reg_alloc(cls, opop)) {
+ break;
+ }
}
+ if(i >= 0)
+ break;
- else {
- ir_node *move = get_irn_n(perm, i);
+ DBG((mod, LEVEL_2, "\tmoving %+F after %+F, killing %+F\n", node, perm, proj));
- DBG((mod, LEVEL_2, "\tmoving %+F before %+F, killing %+F\n", move, last_proj, proj));
+ /* move the movable node in front of the Perm */
+ sched_remove(node);
+ sched_add_after(perm, node);
- /* move the movable node in front of the Perm */
- sched_remove(move);
- sched_add_before(last_proj, move);
+ /* give it the proj's register */
+ arch_set_irn_register(node, arch_get_irn_register(proj));
- /* give it the proj's register */
- arch_set_irn_register(aenv, move, arch_get_irn_register(aenv, proj));
+ /* reroute all users of the proj to the moved node. */
+ edges_reroute(proj, node, irg);
- /* reroute all users of the proj to the moved node. */
- edges_reroute(proj, move, irg);
+ /* and kill it */
+ set_Proj_pred(proj, new_Bad());
+ kill_node(proj);
-#ifdef SCHEDULE_PROJS
- /* remove the proj from the schedule. */
- sched_remove(proj);
-#endif
+ bitset_set(moved, input);
+ n_moved++;
- /* and like it to bad so it is no more in the use array of the perm */
- set_Proj_pred(proj, get_irg_bad(irg));
+ node = sched_prev(node);
+ }
- map[i] = -1;
- }
+ /* well, we could not push anything through the perm */
+ if(n_moved == 0)
+ return 1;
+ new_size = arity - n_moved;
+ if(new_size == 0) {
+ return 0;
}
- if (n_keep > 0)
- be_Perm_reduce(perm, new_size, map);
+ map = alloca(new_size * sizeof(map[0]));
+ proj_map = alloca(arity * sizeof(proj_map[0]));
+ memset(proj_map, -1, sizeof(proj_map[0]));
+ n = 0;
+ for(i = 0; i < arity; ++i) {
+ if(bitset_is_set(moved, i))
+ continue;
+ map[n] = i;
+ proj_map[i] = n;
+ n++;
+ }
+ assert(n == new_size);
+ foreach_out_edge(perm, edge) {
+ ir_node *proj = get_edge_src_irn(edge);
+ int pn = get_Proj_proj(proj);
+ pn = proj_map[pn];
+ assert(pn >= 0);
+ set_Proj_proj(proj, pn);
+ }
- return n_keep > 0;
+ be_Perm_reduce(perm, new_size, map);
+ return 1;
}
/**
* @param walk_env The walker environment
*/
static void lower_nodes_after_ra_walker(ir_node *irn, void *walk_env) {
- if (! is_Block(irn) && ! is_Proj(irn)) {
- if (be_is_Perm(irn)) {
- int perm_stayed = push_through_perm(irn, walk_env);
- if (perm_stayed)
- lower_perm_node(irn, walk_env);
- }
- }
+ int perm_stayed;
+
+ if (is_Block(irn) || is_Proj(irn))
+ return;
+ if (!be_is_Perm(irn))
+ return;
+
+ perm_stayed = push_through_perm(irn, walk_env);
+ if (!perm_stayed)
+ return;
- return;
+ lower_perm_node(irn, walk_env);
}
/**
lower_env_t env;
ir_graph *irg = be_get_birg_irg(birg);
- env.birg = birg;
- env.arch_env = be_get_birg_arch_env(birg);
- env.do_copy = do_copy;
+ env.birg = birg;
+ env.do_copy = do_copy;
FIRM_DBG_REGISTER(env.dbg_module, "firm.be.lower");
/* we will need interference */
projects / libfirm / blobdiff