- spill_info_t *info;
- reloader_t *rel;
-
- info = get_spillinfo(env, to_spill);
-
- if (is_Phi(to_spill)) {
- int i, arity;
-
- /* create spillinfos for the phi arguments */
- for (i = 0, arity = get_irn_arity(to_spill); i < arity; ++i) {
- ir_node *arg = get_irn_n(to_spill, i);
- get_spillinfo(env, arg);
- }
-
-#if 1
- // hackery... sometimes the morgan algo spilled the value of a phi,
- // the belady algo decides later to spill the whole phi, then sees the
- // spill node and adds a reload for that spill node, problem is the
- // reload gets attach to that same spill (and is totally unnecessary)
- if (info->old_spill != NULL &&
- (before == info->old_spill || value_dominates(before, info->old_spill)))
- {
- printf("spilledphi hack was needed...\n");
- before = sched_next(info->old_spill);
- }
-#endif
- }
-
- /* put reload into list */
- rel = obstack_alloc(&env->obst, sizeof(rel[0]));
- rel->next = info->reloaders;
- rel->reloader = before;
- rel->rematted_node = NULL;
- rel->allow_remat = allow_remat;
-
- info->reloaders = rel;
- assert(info->reload_cls == NULL || info->reload_cls == reload_cls);
- info->reload_cls = reload_cls;
-
- DBG((env->dbg, LEVEL_1, "creating spillinfo for %+F, will be reloaded before %+F, may%s be rematerialized\n",
- to_spill, before, allow_remat ? "" : " not"));
-}
-
-static ir_node *get_reload_insertion_point(ir_node *block, int pos) {
- ir_node *predblock, *last;
-
- /* simply add the reload to the beginning of the block if we only have 1 predecessor
- * (we don't need to check for phis as there can't be any in a block with only 1 pred)
- */
- if(get_Block_n_cfgpreds(block) == 1) {
- assert(!is_Phi(sched_first(block)));
- return sched_first(block);
- }
-
- /* We have to reload the value in pred-block */
- predblock = get_Block_cfgpred_block(block, pos);
- last = sched_last(predblock);
-
- /* we might have projs and keepanys behind the jump... */
- while(is_Proj(last) || be_is_Keep(last)) {
- last = sched_prev(last);
- assert(!sched_is_end(last));
- }
-
- if(!is_cfop(last)) {
- last = sched_next(last);
- // last node must be a cfop, only exception is the start block
- assert(last == get_irg_start_block(get_irn_irg(block)));
- }
-
- // add the reload before the (cond-)jump
- return last;
-}
-
-void be_add_reload_on_edge(spill_env_t *env, ir_node *to_spill, ir_node *block, int pos,
- const arch_register_class_t *reload_cls, int allow_remat)
-{
- ir_node *before = get_reload_insertion_point(block, pos);
- be_add_reload(env, to_spill, before, reload_cls, allow_remat);
-}
-
-void be_spill_phi(spill_env_t *env, ir_node *node) {
- spill_info_t* spill;
- int i, arity;
-
- assert(is_Phi(node));
-
- pset_insert_ptr(env->mem_phis, node);
-
- // create spillinfos for the phi arguments
- spill = get_spillinfo(env, node);
- for(i = 0, arity = get_irn_arity(node); i < arity; ++i) {
- ir_node *arg = get_irn_n(node, i);
- get_spillinfo(env, arg);
- }
-
- // if we had a spill for the phi value before, then remove this spill from
- // schedule, as we will remove it in the insert spill/reload phase
- if(spill->spill != NULL && !is_Phi(spill->spill)) {
- assert(spill->old_spill == NULL);
- spill->old_spill = spill->spill;
- spill->spill = NULL;
- }
-}
-
-/*
- * ____ _ ____ _ _ _
- * / ___|_ __ ___ __ _| |_ ___ / ___| _ __ (_) | |___
- * | | | '__/ _ \/ _` | __/ _ \ \___ \| '_ \| | | / __|
- * | |___| | | __/ (_| | || __/ ___) | |_) | | | \__ \
- * \____|_| \___|\__,_|\__\___| |____/| .__/|_|_|_|___/
- * |_|
- */
-
-/**
- * Schedules a node after an instruction. (That is the place after all projs and phis
- * that are scheduled after the instruction)
- * This function also skips phi nodes at the beginning of a block
- */
-static void sched_add_after_insn(ir_node *sched_after, ir_node *node) {
- ir_node *next = sched_next(sched_after);
- while(is_Proj(next) || is_Phi(next)) {
- next = sched_next(next);
- }
- assert(next != NULL);
-
- if(sched_is_end(next)) {
- sched_add_after(sched_last(get_nodes_block(sched_after)), node);
- } else {
- sched_add_before(next, node);
- }
-}
-
-/**
- * Creates a spill.
- *
- * @param senv the spill environment
- * @param irn the node that should be spilled
- * @param ctx_irn an user of the spilled node
- *
- * @return a be_Spill node
- */
-static void spill_irn(spill_env_t *env, spill_info_t *spillinfo) {
- optimization_state_t opt;
- ir_node *to_spill = spillinfo->spilled_node;
-
- DBG((env->dbg, LEVEL_1, "spilling %+F ... ", to_spill));
-
- /* Trying to spill an already spilled value, no need for a new spill
- * node then, we can simply connect to the same one for this reload
- *
- * (although rematerialization code should handle most of these cases
- * this can still happen when spilling Phis)