+int get_Block_postdom_pre_num(const ir_node *bl) {
+ assert(get_irn_op(bl) == op_Block);
+ return get_pdom_info(bl)->pre_num;
+}
+
+void set_Block_postdom_pre_num(ir_node *bl, int num) {
+ assert(get_irn_op(bl) == op_Block);
+ get_pdom_info(bl)->pre_num = num;
+}
+
+int get_Block_postdom_depth(const ir_node *bl) {
+ assert(get_irn_op(bl) == op_Block);
+ return get_pdom_info(bl)->dom_depth;
+}
+
+void set_Block_postdom_depth(ir_node *bl, int depth) {
+ assert(get_irn_op(bl) == op_Block);
+ get_pdom_info(bl)->dom_depth = depth;
+}
+
+unsigned get_Block_dom_tree_pre_num(const ir_node *bl) {
+ assert(is_Block(bl));
+ return get_dom_info(bl)->tree_pre_num;
+}
+
+unsigned get_Block_dom_max_subtree_pre_num(const ir_node *bl) {
+ assert(is_Block(bl));
+ return get_dom_info(bl)->max_subtree_pre_num;
+}
+
+unsigned get_Block_pdom_tree_pre_num(const ir_node *bl) {
+ assert(is_Block(bl));
+ return get_pdom_info(bl)->tree_pre_num;
+}
+
+unsigned get_Block_pdom_max_subtree_pre_num(const ir_node *bl) {
+ assert(is_Block(bl));
+ return get_pdom_info(bl)->max_subtree_pre_num;
+}
+
+/* Check, if a block dominates another block. */
+int block_dominates(const ir_node *a, const ir_node *b) {
+ const ir_dom_info *ai, *bi;
+
+ if (is_Block(a) && is_Block(b)) {
+ ai = get_dom_info(a);
+ bi = get_dom_info(b);
+ return bi->tree_pre_num - ai->tree_pre_num
+ <= ai->max_subtree_pre_num - ai->tree_pre_num;
+ }
+
+ return 0;
+}
+
+/* Check, if a block strictly dominates another block. */
+int block_strictly_dominates(const ir_node *a, const ir_node *b) {
+ return (a != b) && block_dominates(a, b);
+}
+
+/* Returns the smallest common dominator block of two nodes. */
+ir_node *node_smallest_common_dominator(ir_node *a, ir_node *b) {
+ ir_node *bl_a = is_Block(a) ? a : get_nodes_block(a);
+ ir_node *bl_b = is_Block(b) ? b : get_nodes_block(b);
+ ir_node *dom_bl = NULL;
+
+ /* Check if block of a dominates block of b */
+ if (block_dominates(bl_a, bl_b))
+ dom_bl = bl_a;
+ /* Check if block of b dominates block of a */
+ else if (block_dominates(bl_b, bl_a))
+ dom_bl = bl_b;
+ else {
+ /* walk up dominator tree and search for first block dominating a and b */
+ while (! dom_bl) {
+ bl_a = get_Block_idom(bl_a);
+
+ assert(! is_Bad(bl_a) && "block is dead?");
+
+ if (block_dominates(bl_a, bl_b))
+ dom_bl = bl_a;
+ }
+ }
+
+ return dom_bl;
+}
+
+/* Returns the smallest common dominator block of all users of a node. */
+ir_node *node_users_smallest_common_dominator(ir_node *irn, int handle_phi) {
+ int n, j, i = 0, success;
+ ir_node **user_blocks, *dom_bl;
+ const ir_edge_t *edge;
+
+ assert(! is_Block(irn) && "WRONG USAGE of node_users_smallest_common_dominator");
+ assert(edges_activated(get_irn_irg(irn)) && "need edges activated");
+
+ n = get_irn_n_edges(irn);
+
+ /* get array to hold all block of the node users */
+ NEW_ARR_A(ir_node *, user_blocks, n);
+ foreach_out_edge(irn, edge) {
+ ir_node *src = get_edge_src_irn(edge);
+
+ if (is_Phi(src) && handle_phi) {
+ /* get the corresponding cfg predecessor block if phi handling requested */
+ j = get_edge_src_pos(edge);
+ assert(j >= 0 && "kaputt");
+ user_blocks[i++] = get_Block_cfgpred_block(get_nodes_block(src), j);
+ }
+ else
+ user_blocks[i++] = is_Block(src) ? src : get_nodes_block(src);
+ }
+
+ assert(i == n && "get_irn_n_edges probably broken");
+
+ /* in case of only one user: return the block of the user */
+ if (n == 1)
+ return user_blocks[0];
+
+ i = 0;
+ /* search the smallest block dominating all user blocks */
+ do {
+ dom_bl = node_smallest_common_dominator(user_blocks[i], user_blocks[i + 1]);
+ success = 1;
+
+ /* check if this block dominates all remaining blocks as well */
+ for (j = i + 2; j < n; j++) {
+ if (! block_dominates(dom_bl, user_blocks[j]))
+ success = 0;
+ }
+
+ if (success)
+ break;
+
+ /* inherit the dominator block of the first (i + 1) users */
+ user_blocks[++i] = dom_bl;
+ } while (i < n - 1);
+
+ assert(success && "no block found dominating all users");
+
+ return dom_bl;
+}
+
+
+/* Get the first node in the list of nodes dominated by a given block. */
+ir_node *get_Block_dominated_first(const ir_node *bl) {
+ assert(is_Block(bl));
+ return get_dom_info(bl)->first;
+}
+
+/* Get the next node in a list of nodes which are dominated by some
+ * other node. */
+ir_node *get_Block_dominated_next(const ir_node *bl) {
+ assert(is_Block(bl));
+ return get_dom_info(bl)->next;
+}
+
+/* Check, if a block post dominates another block. */
+int block_postdominates(const ir_node *a, const ir_node *b) {
+ const ir_dom_info *ai, *bi;
+
+ if (is_Block(a) && is_Block(b)) {
+ ai = get_pdom_info(a);
+ bi = get_pdom_info(b);
+ return bi->tree_pre_num - ai->tree_pre_num
+ <= ai->max_subtree_pre_num - ai->tree_pre_num;
+ }
+
+ return 0;
+}
+
+/* Check, if a block strictly dominates another block. */
+int block_strictly_postdominates(const ir_node *a, const ir_node *b) {
+ return (a != b) && block_postdominates(a, b);
+}
+
+
+/* Get the first node in the list of nodes post dominated by a given block. */
+ir_node *get_Block_postdominated_first(const ir_node *bl) {
+ assert(is_Block(bl));
+ return get_pdom_info(bl)->first;
+}
+
+/* Get the next node in a list of nodes which are post dominated by some
+ * other node. */
+ir_node *get_Block_postdominated_next(const ir_node *bl) {
+ assert(is_Block(bl));
+ return get_pdom_info(bl)->next;
+}
+
+/* Visit all nodes in the dominator subtree of a given node. */
+void dom_tree_walk(ir_node *bl, irg_walk_func *pre,
+ irg_walk_func *post, void *env)
+{
+ ir_node *p;
+
+ if(pre)
+ pre(bl, env);
+
+ dominates_for_each(bl, p) {
+ dom_tree_walk(p, pre, post, env);
+ }
+
+ if(post)
+ post(bl, env);
+}
+
+/* Visit all nodes in the post dominator subtree of a given node. */
+void postdom_tree_walk(ir_node *bl, irg_walk_func *pre,
+ irg_walk_func *post, void *env)
+{
+ ir_node *p;
+
+ if(pre)
+ pre(bl, env);
+
+ postdominates_for_each(bl, p) {
+ postdom_tree_walk(p, pre, post, env);
+ }
+
+ if(post)
+ post(bl, env);
+}
+
+/* Walk over the dominator tree of an irg starting at the root. */
+void dom_tree_walk_irg(ir_graph *irg, irg_walk_func *pre,
+ irg_walk_func *post, void *env)
+{
+ /* The root of the dominator tree should be the Start block. */
+ ir_node *root = get_irg_start_block(irg);
+
+ assert(irg->dom_state == dom_consistent
+ && "The dominators of the irg must be consistent");
+ assert(root && "The start block of the graph is NULL?");
+ assert(get_dom_info(root)->idom == NULL
+ && "The start node in the graph must be the root of the dominator tree");
+ dom_tree_walk(root, pre, post, env);
+}
+
+/* Walk over the post dominator tree of an irg starting at the root. */
+void postdom_tree_walk_irg(ir_graph *irg, irg_walk_func *pre,
+ irg_walk_func *post, void *env)
+{
+ /* The root of the dominator tree should be the End block. */
+ ir_node *root = get_irg_end_block(irg);
+
+ assert(irg->pdom_state == dom_consistent
+ && "The dominators of the irg must be consistent");
+ assert(root && "The end block of the graph is NULL?");
+ assert(get_pdom_info(root)->idom == NULL
+ && "The End block node in the graph must be the root of the post dominator tree");
+ postdom_tree_walk(root, pre, post, env);
+}
+
+
+static void assign_tree_dom_pre_order(ir_node *bl, void *data)
+{
+ unsigned *num = data;
+ ir_dom_info *bi = get_dom_info(bl);
+
+ bi->tree_pre_num = (*num)++;
+}
+
+static void assign_tree_dom_pre_order_max(ir_node *bl, void *data)
+{
+ ir_dom_info *bi = get_dom_info(bl);
+ ir_node *p;
+ unsigned max = 0;
+ unsigned children = 0;
+ (void) data;
+
+ for(p = bi->first; p; p = get_dom_info(p)->next) {
+ unsigned max_p = get_dom_info(p)->max_subtree_pre_num;
+ max = max > max_p ? max : max_p;
+ children++;
+ }
+
+ bi->max_subtree_pre_num = children > 0 ? max : bi->tree_pre_num;
+ assert(bi->max_subtree_pre_num >= bi->tree_pre_num);
+}
+
+static void assign_tree_postdom_pre_order(ir_node *bl, void *data)
+{
+ unsigned *num = data;
+ ir_dom_info *bi = get_pdom_info(bl);
+
+ bi->tree_pre_num = (*num)++;
+}
+
+static void assign_tree_postdom_pre_order_max(ir_node *bl, void *data)
+{
+ ir_dom_info *bi = get_pdom_info(bl);
+ ir_node *p;
+ unsigned max = 0;
+ unsigned children = 0;
+ (void) data;
+
+ for(p = bi->first; p; p = get_pdom_info(p)->next) {
+ unsigned max_p = get_pdom_info(p)->max_subtree_pre_num;
+ max = max > max_p ? max : max_p;
+ children++;
+ }
+
+ bi->max_subtree_pre_num = children > 0 ? max : bi->tree_pre_num;
+ assert(bi->max_subtree_pre_num >= bi->tree_pre_num);
+}