- 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.
- */
-static INLINE int _strictly_dominates_use(const ir_node *irn, const ir_edge_t *edge)
-{
- return get_edge_src_irn(edge) != irn && _dominates_use(irn, edge);
-}
-
-/**
- * Check, if a node is live in front of another.
- * @param birg The backend irg.
- * @param irn The node.
- * @param where The location to check for.
- * @return 1, if @p irn is live in front of @p where.
- */
-static INLINE int _be_lv_chk_before_irn(const be_irg_t *birg, const ir_node *irn, const ir_node *where)
-{
- const be_lv_t *lv = be_get_birg_liveness(birg);
- const ir_edge_t *edge;
-
- /* the node must strictly dominate the location, else it cannot be live there. */
- if (!_value_dominates(irn, where) || irn == where)
- return 0;
-
- /*
- * now that it is clear that it strictly dominates the location it is surely live
- * if it is also live end at the block.
- */
- if (be_is_live_end(lv, get_nodes_block(where), irn))
- return 1;
-
- /*
- * If the node is not live out, we have to check if there
- * is a use which is dominated by the location.
- */
- foreach_out_edge (irn, edge) {
- if (_dominates_use(where, edge))
- return 1;
- }
-
- return 0;
-}
-
-/**
- * Check, if a node is live after another node.
- * @param birg The backend irg.
- * @param irn The node.
- * @param where The location to check for.
- * @return 1, if @p irn is live after @p where.
- */
-static INLINE int _be_lv_chk_after_irn(const be_irg_t *birg, const ir_node *irn, const ir_node *where)
-{
- const be_lv_t *lv = be_get_birg_liveness(birg);
- const ir_edge_t *edge;
-
- if (!_value_dominates(irn, where))
- return 0;
-
- if (be_is_live_end(lv, get_nodes_block(where), irn))
- return 1;
-
- foreach_out_edge (irn, edge) {
- if (_strictly_dominates_use(where, edge))
- return 1;
+ ir_node *const 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 true;
+
+ /* 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) {
+ ir_node const *const user = get_edge_src_irn(edge);
+ if (get_nodes_block(user) == bb && !is_Phi(user) && _value_strictly_dominates_intrablock(b, user))
+ return true;