+static inline struct backend_instruction *
+bblock_start(struct bblock_t *block)
+{
+ return (struct backend_instruction *)exec_list_get_head(&block->instructions);
+}
+
+static inline const struct backend_instruction *
+bblock_start_const(const struct bblock_t *block)
+{
+ return (const struct backend_instruction *)exec_list_get_head_const(&block->instructions);
+}
+
+static inline struct backend_instruction *
+bblock_end(struct bblock_t *block)
+{
+ return (struct backend_instruction *)exec_list_get_tail(&block->instructions);
+}
+
+static inline const struct backend_instruction *
+bblock_end_const(const struct bblock_t *block)
+{
+ return (const struct backend_instruction *)exec_list_get_tail_const(&block->instructions);
+}
+
+static inline struct bblock_t *
+bblock_next(struct bblock_t *block)
+{
+ return (struct bblock_t *)block->link.next;
+}
+
+static inline const struct bblock_t *
+bblock_next_const(const struct bblock_t *block)
+{
+ return (const struct bblock_t *)block->link.next;
+}
+
+static inline struct bblock_t *
+bblock_prev(struct bblock_t *block)
+{
+ return (struct bblock_t *)block->link.prev;
+}
+
+static inline const struct bblock_t *
+bblock_prev_const(const struct bblock_t *block)
+{
+ return (const struct bblock_t *)block->link.prev;
+}
+
+static inline bool
+bblock_starts_with_control_flow(const struct bblock_t *block)
+{
+ enum opcode op = bblock_start_const(block)->opcode;
+ return op == BRW_OPCODE_DO || op == BRW_OPCODE_ENDIF;
+}
+
+static inline bool
+bblock_ends_with_control_flow(const struct bblock_t *block)
+{
+ enum opcode op = bblock_end_const(block)->opcode;
+ return op == BRW_OPCODE_IF ||
+ op == BRW_OPCODE_ELSE ||
+ op == BRW_OPCODE_WHILE ||
+ op == BRW_OPCODE_BREAK ||
+ op == BRW_OPCODE_CONTINUE;
+}
+
+static inline struct backend_instruction *
+bblock_first_non_control_flow_inst(struct bblock_t *block)
+{
+ struct backend_instruction *inst = bblock_start(block);
+ if (bblock_starts_with_control_flow(block))
+#ifdef __cplusplus
+ inst = (struct backend_instruction *)inst->next;
+#else
+ inst = (struct backend_instruction *)inst->link.next;
+#endif
+ return inst;
+}
+
+static inline struct backend_instruction *
+bblock_last_non_control_flow_inst(struct bblock_t *block)
+{
+ struct backend_instruction *inst = bblock_end(block);
+ if (bblock_ends_with_control_flow(block))
+#ifdef __cplusplus
+ inst = (struct backend_instruction *)inst->prev;
+#else
+ inst = (struct backend_instruction *)inst->link.prev;
+#endif
+ return inst;
+}
+
+#ifdef __cplusplus
+inline backend_instruction *
+bblock_t::start()
+{
+ return bblock_start(this);
+}
+
+inline const backend_instruction *
+bblock_t::start() const
+{
+ return bblock_start_const(this);
+}
+
+inline backend_instruction *
+bblock_t::end()
+{
+ return bblock_end(this);
+}
+
+inline const backend_instruction *
+bblock_t::end() const
+{
+ return bblock_end_const(this);
+}
+
+inline bblock_t *
+bblock_t::next()
+{
+ return bblock_next(this);
+}
+
+inline const bblock_t *
+bblock_t::next() const
+{
+ return bblock_next_const(this);
+}
+
+inline bblock_t *
+bblock_t::prev()
+{
+ return bblock_prev(this);
+}
+
+inline const bblock_t *
+bblock_t::prev() const
+{
+ return bblock_prev_const(this);
+}
+
+inline bool
+bblock_t::starts_with_control_flow() const
+{
+ return bblock_starts_with_control_flow(this);
+}
+
+inline bool
+bblock_t::ends_with_control_flow() const
+{
+ return bblock_ends_with_control_flow(this);
+}
+
+inline backend_instruction *
+bblock_t::first_non_control_flow_inst()
+{
+ return bblock_first_non_control_flow_inst(this);
+}
+
+inline backend_instruction *
+bblock_t::last_non_control_flow_inst()
+{
+ return bblock_last_non_control_flow_inst(this);
+}
+#endif
+