#define DBG_LIVE 1
#define DBG_LOOPANA 2
#define DBG_PRESSURE 4
+#define DBG_SPILLS 8
DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
typedef struct morgan_env {
* 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 INLINE void construct_loop_edges(ir_node* block, void* e) {
- morgan_env_t *env = (morgan_env_t*) e;
+static INLINE void construct_loop_edges(ir_node* block, void* data) {
+ morgan_env_t *env = data;
int n_cfgpreds = get_Block_n_cfgpreds(block);
int i;
ir_loop* loop = get_irn_loop(block);
- loop_attr_t *loop_attr = get_loop_attr(env, loop);
DBG((dbg, DBG_LOOPANA, "Loop for %+F: %d (depth %d)\n", block, loop->loop_nr, loop->depth));
for(i = 0; i < n_cfgpreds; ++i) {
+ loop_edge_t edge;
+ int hash;
ir_node* cfgpred = get_Block_cfgpred(block, i);
ir_node* cfgpred_block = get_nodes_block(cfgpred);
ir_loop* cfgpred_loop = get_irn_loop(cfgpred_block);
- loop_attr_t *outedges = get_loop_attr(env, cfgpred_loop);
if(cfgpred_loop == loop)
continue;
- // is it an edge into the loop?
- if(get_loop_depth(loop) > get_loop_depth(cfgpred_loop)) {
- loop_edge_t edge;
- edge.block = block;
- edge.pos = i;
- DBG((dbg, DBG_LOOPANA, "Loop in edge from %+F (loop %d) to %+F (loop %d)\n", cfgpred_block, get_loop_loop_nr(cfgpred_loop), block, get_loop_loop_nr(loop)));
- set_insert(loop_attr->in_edges, &edge, sizeof(edge), loop_edge_hash(&edge));
- } else {
- ir_loop *p_loop = cfgpred_loop;
- while(get_loop_depth(p_loop) > get_loop_depth(loop)) {
- p_loop = get_loop_outer_loop(p_loop);
- }
- if(p_loop != loop) {
- loop_edge_t edge;
- edge.block = block;
- edge.pos = i;
- DBG((dbg, DBG_LOOPANA, "Loop in edge from %+F (loop %d) to %+F (loop %d)\n", cfgpred_block, get_loop_loop_nr(cfgpred_loop), block, get_loop_loop_nr(loop)));
- set_insert(loop_attr->in_edges, &edge, sizeof(edge), loop_edge_hash(&edge));
- }
- }
+ assert(get_loop_depth(cfgpred_loop) != get_loop_depth(loop));
+
+ edge.block = block;
+ edge.pos = i;
+ hash = loop_edge_hash(&edge);
+
+ // edge out of a loop?
+ if(get_loop_depth(cfgpred_loop) > get_loop_depth(loop)) {
+ ir_loop *l;
+
+ DBG((dbg, DBG_LOOPANA, "Loop out edge from %+F (loop %d) to %+F (loop %d)\n", block, get_loop_loop_nr(loop),
+ cfgpred_block, get_loop_loop_nr(cfgpred_loop)));
- // an edge out of the loop?
- if(get_loop_depth(cfgpred_loop) >= get_loop_depth(loop)) {
- loop_edge_t edge;
- edge.block = block;
- edge.pos = i;
- DBG((dbg, DBG_LOOPANA, "Loop out edge from %+F (loop %d) to %+F\n", cfgpred_block, cfgpred_loop->loop_nr, block));
- set_insert(outedges->out_edges, &edge, sizeof(edge), loop_edge_hash(&edge));
+ /* this might be a jump out of multiple loops, so add this to all
+ * needed outedge sets */
+ l = cfgpred_loop;
+ do {
+ loop_attr_t *l_attr = get_loop_attr(env, l);
+ set_insert(l_attr->out_edges, &edge, sizeof(edge), hash);
+
+ l = get_loop_outer_loop(l);
+ assert(l != NULL);
+ } while(l != loop);
} else {
- ir_loop *o_loop = loop;
+ ir_loop *l;
- // we might jump in the middle of another inner loop which is not inside
- // our loop (happens for irreducible graphs). This would be a
- // real out edge then.
- while(get_loop_depth(o_loop) > get_loop_depth(cfgpred_loop)) {
- o_loop = get_loop_outer_loop(o_loop);
- }
+ // edge into a loop
+ DBG((dbg, DBG_LOOPANA, "Loop in edge from %+F (loop %d) to %+F (loop %d)\n", block, get_loop_loop_nr(loop),
+ cfgpred_block, get_loop_loop_nr(cfgpred_loop)));
- if(cfgpred_loop != o_loop) {
- loop_edge_t edge;
- edge.block = block;
- edge.pos = i;
- DBG((dbg, DBG_LOOPANA, "Loop out edge from %+F (loop %d) to %+F (into jump)\n", cfgpred_block, cfgpred_loop->loop_nr, block));
- set_insert(outedges->out_edges, &edge, sizeof(edge), loop_edge_hash(&edge));
- }
+ l = loop;
+ do {
+ loop_attr_t *l_attr = get_loop_attr(env, l);
+ set_insert(l_attr->in_edges, &edge, sizeof(edge), hash);
+
+ l = get_loop_outer_loop(l);
+ } while(l != cfgpred_loop);
}
}
}
bitset_foreach(bitset, i) {
ir_node* node = get_idx_irn(irg, i);
- DBG((dbg, DBG_LIVE, "\t%+F\n", node));
+ ir_fprintf(stderr, " %+F", node);
}
+ fprintf(stderr, "\n");
}
/**
}
}
- show_nodebitset(env->irg, block_attr->livethrough_unused);
return block_attr->livethrough_unused;
}
bitset_andnot(son_attr->livethrough_unused, loop_attr->livethrough_unused);
DBG((dbg, DBG_LIVE, "Livethroughs for loop %d:\n", loop->loop_nr));
- show_nodebitset(env->irg, son_attr->livethrough_unused);
} else if(*elem.kind == k_ir_node) {
block_attr_t *block_attr = get_block_attr(env, elem.node);
bitset_andnot(block_attr->livethrough_unused, loop_attr->livethrough_unused);
DBG((dbg, DBG_LIVE, "Livethroughs for block %+F\n", elem.node));
- show_nodebitset(env->irg, block_attr->livethrough_unused);
} else {
assert(0);
}
spills_to_place = spills_needed;
+ DBG((dbg, DBG_SPILLS, "%d values unused in loop %d, spilling %d\n",
+ spills_possible - outer_spills_possible, loop->loop_nr, spills_to_place));
+ show_nodebitset(env->irg, loop_attr->livethrough_unused);
+
bitset_foreach(loop_attr->livethrough_unused, i) {
loop_edge_t *edge;
ir_node *to_spill = get_idx_irn(env->irg, i);
+ DBG((dbg, DBG_SPILLS, "Spilling node %+F around loop %d\n", to_spill, loop->loop_nr));
+
for(edge = set_first(loop_attr->out_edges); edge != NULL; edge = set_next(loop_attr->out_edges)) {
- DBG((dbg, DBG_PRESSURE, "Spilling node %+F around loop %d\n", to_spill, loop->loop_nr));
be_add_reload_on_edge(env->senv, to_spill, edge->block, edge->pos);
}
morgan_env_t env;
FIRM_DBG_REGISTER(dbg, "ir.be.spillmorgan");
- //firm_dbg_set_mask(dbg, DBG_LOOPANA | DBG_PRESSURE);
+ //firm_dbg_set_mask(dbg, DBG_SPILLS | DBG_LOOPANA);
env.cenv = chordal_env;
env.arch = chordal_env->birg->main_env->arch_env;
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