- * @return 1, if a and b interfere, 0 if not.
- */
-static INLINE int _lv_values_interfere(const be_lv_t *lv, const ir_node *a, const ir_node *b)
-{
- int a2b = _value_dominates(a, b);
- int b2a = _value_dominates(b, a);
-
- /* If there is no dominance relation, they do not interfere. */
- if((a2b | b2a) > 0) {
- const ir_edge_t *edge;
- ir_node *bb;
-
- /*
- * Adjust a and b so, that a dominates b if
- * a dominates b or vice versa.
- */
- if(b2a) {
- const ir_node *t = a;
- a = b;
- b = t;
- }
-
- bb = get_nodes_block(b);
-
- /*
- * If a is live end in b's block it is
- * live at b's definition (a dominates b)
- */
- if(be_is_live_end(lv, bb, a))
- return 1;
-
- /*
- * Look at all usages of a.
- * If there's one usage of a in the block of b, then
- * we check, if this use is dominated by b, if that's true
- * a and b interfere. Note that b must strictly dominate the user,
- * since if b is the last user of in the block, b and a do not
- * interfere.
- * Uses of a not in b's block can be disobeyed, because the
- * check for a being live at the end of b's block is already
- * performed.
- */
- foreach_out_edge(a, edge) {
- const ir_node *user = get_edge_src_irn(edge);
- if(get_nodes_block(user) == bb && !is_Phi(user) && b != user && _value_dominates(b, user))
- return 1;
- }
- }
-
- return 0;
-}
-
-
-
-/**
- * Check if a node dominates a use.
- * Note that the use of a phi is in its corresponding predecessor.
- * @param irn The node.
- * @param edge The use.
- * @return 1, if @p irn dominates the use @p edge.
- */
-static INLINE int _dominates_use(const ir_node *irn, const ir_edge_t *edge)
-{
- ir_node *use = get_edge_src_irn(edge);
-
- if (is_Phi(use)) {
- int pos = get_edge_src_pos(edge);
- ir_node *phi_bl = get_nodes_block(use);
- ir_node *use_bl = get_Block_cfgpred_block(phi_bl, pos);
- ir_node *irn_bl = get_nodes_block(irn);
- return block_dominates(irn_bl, use_bl);
- }
-
- return _value_dominates(irn, use);
-}
-
-/**
- * Check if a node strictly dominates a use.
- * Note that the use of a phi is in its corresponding predecessor.
- * @param irn The node.
- * @param edge The use.
- * @return 1, if @p irn strictly dominates the use @p edge.