+ be_node_get_irn_ops
+};
+
+/*
+ ____ _ _ ___ ____ _ _ _ _ _ _
+ | _ \| |__ (_) |_ _| _ \| \ | | | | | | __ _ _ __ __| | | ___ _ __
+ | |_) | '_ \| | | || |_) | \| | | |_| |/ _` | '_ \ / _` | |/ _ \ '__|
+ | __/| | | | | | || _ <| |\ | | _ | (_| | | | | (_| | | __/ |
+ |_| |_| |_|_| |___|_| \_\_| \_| |_| |_|\__,_|_| |_|\__,_|_|\___|_|
+
+*/
+
+typedef struct {
+ arch_irn_handler_t irn_handler;
+ arch_irn_ops_t irn_ops;
+ const arch_env_t *arch_env;
+ pmap *regs;
+} phi_handler_t;
+
+#define get_phi_handler_from_handler(h) container_of(h, phi_handler_t, irn_handler)
+#define get_phi_handler_from_ops(h) container_of(h, phi_handler_t, irn_ops)
+
+static const void *phi_get_irn_ops(const arch_irn_handler_t *handler, const ir_node *irn)
+{
+ const phi_handler_t *h = get_phi_handler_from_handler(handler);
+ return is_Phi(irn) && mode_is_datab(get_irn_mode(irn)) ? &h->irn_ops : NULL;
+}
+
+/**
+ * Get register class of a Phi.
+ *
+ */
+static const arch_register_req_t *get_Phi_reg_req_recursive(const phi_handler_t *h, arch_register_req_t *req, const ir_node *phi, pset **visited)
+{
+ int n = get_irn_arity(phi);
+ ir_node *op;
+ int i;
+
+ if(*visited && pset_find_ptr(*visited, phi))
+ return NULL;
+
+ for(i = 0; i < n; ++i) {
+ op = get_irn_n(phi, i);
+ if(!is_Phi(op))
+ return arch_get_register_req(h->arch_env, req, op, BE_OUT_POS(0));
+ }
+
+ /*
+ The operands of that Phi were all Phis themselves.
+ We have to start a DFS for a non-Phi argument now.
+ */
+ if(!*visited)
+ *visited = pset_new_ptr(16);
+
+ pset_insert_ptr(*visited, phi);
+
+ for(i = 0; i < n; ++i) {
+ op = get_irn_n(phi, i);
+ if(get_Phi_reg_req_recursive(h, req, op, visited))
+ return req;
+ }
+
+ return NULL;
+}
+
+static const arch_register_req_t *phi_get_irn_reg_req(const void *self, arch_register_req_t *req, const ir_node *irn, int pos)
+{
+ phi_handler_t *phi_handler = get_phi_handler_from_ops(self);
+ pset *visited = NULL;
+
+ get_Phi_reg_req_recursive(phi_handler, req, irn, &visited);
+ /* Set the requirements type to normal, since an operand of the Phi could have had constraints. */
+ req->type = arch_register_req_type_normal;
+ if(visited)
+ del_pset(visited);
+
+ return req;
+}
+
+static void phi_set_irn_reg(const void *self, ir_node *irn, const arch_register_t *reg)
+{
+ phi_handler_t *h = get_phi_handler_from_ops(self);
+ pmap_insert(h->regs, irn, (void *) reg);
+}
+
+static const arch_register_t *phi_get_irn_reg(const void *self, const ir_node *irn)
+{
+ phi_handler_t *h = get_phi_handler_from_ops(self);
+ return pmap_get(h->regs, (void *) irn);
+}
+
+static arch_irn_class_t phi_classify(const void *_self, const ir_node *irn)
+{
+ return arch_irn_class_normal;
+}
+
+static arch_irn_flags_t phi_get_flags(const void *_self, const ir_node *irn)
+{
+ return arch_irn_flags_none;
+}
+
+static entity *phi_get_frame_entity(const void *_self, const ir_node *irn)
+{
+ return NULL;
+}
+
+static void phi_set_frame_offset(const void *_self, ir_node *irn, int bias)
+{
+}
+
+static const arch_irn_ops_if_t phi_irn_ops = {
+ phi_get_irn_reg_req,
+ phi_set_irn_reg,
+ phi_get_irn_reg,
+ phi_classify,
+ phi_get_flags,
+ phi_get_frame_entity,
+ phi_set_frame_offset