added function get nodes nodes live at another including the node inputs

ir/be/belive.c

@@ -734,3 +734,18 @@ pset *be_liveness_nodes_live_at(const be_lv_t *lv, const arch_env_t *arch_env, c
 
 	return live;
 }
+
+pset *be_liveness_nodes_live_at_input(const be_lv_t *lv, const arch_env_t *arch_env, const arch_register_class_t *cls, const ir_node *pos, pset *live)
+{
+	const ir_node *bl = is_Block(pos) ? pos : get_nodes_block(pos);
+	ir_node *irn;
+
+	be_liveness_end_of_block(lv, arch_env, cls, bl, live);
+	sched_foreach_reverse(bl, irn) {
+		be_liveness_transfer(arch_env, cls, irn, live);
+		if(irn == pos)
+			return live;
+	}
+
+	return live;
+}

ir/be/belive.h

@@ -145,6 +145,8 @@ pset *be_liveness_end_of_block(const be_lv_t *lv, const arch_env_t *arch_env, co
 
 /**
  * Compute a set of nodes which are live at another node.
+ * BEWARE: This is the liveness immediately after the node,
+ *         so the node itself is alive but it's operands maybe not.
  * @param arch_env The architecture environment.
  * @param cls      The register class to consider.
  * @param pos      The node.
@@ -153,6 +155,18 @@ pset *be_liveness_end_of_block(const be_lv_t *lv, const arch_env_t *arch_env, co
  */
 pset *be_liveness_nodes_live_at(const be_lv_t *lv, const arch_env_t *arch_env, const arch_register_class_t *cls, const ir_node *pos, pset *live);
 
+/**
+ * Compute a set of nodes which are live at another node.
+ * BEWARE: This is the liveness immediately before the node,
+ *         so the node itself is not alive but it's operands are.
+ * @param arch_env The architecture environment.
+ * @param cls      The register class to consider.
+ * @param pos      The node.
+ * @param live     The set to put them into.
+ * @return live.
+ */
+pset *be_liveness_nodes_live_at_input(const be_lv_t *lv, const arch_env_t *arch_env, const arch_register_class_t *cls, const ir_node *pos, pset *live);
+
 
 /**
  * FIXME: Need comment