+/* $Id$ */
#ifndef _BESCHED_T_H
#define _BESCHED_T_H
#include "irnode_t.h"
#include "irgraph_t.h"
+#include "beutil.h"
#include "besched.h"
typedef unsigned int sched_timestep_t;
/**
* The schedule structure which is present at each ir node.
+ *
+ * Currently, only basic blocks are scheduled. The list head of
+ * every block schedule list is the Block list.
*/
typedef struct _sched_info_t {
struct list_head list; /**< The list head to list the nodes in a schedule. */
sched_timestep_t time_step; /**< If a is after b in a schedule, its time step is
larger than b's. */
-
- int scheduled : 1; /**< 1, if the node is in the schedule of the block, 0 else. */
+ unsigned scheduled : 1; /**< 1, if the node is in the schedule of the block, 0 else. */
} sched_info_t;
#define _sched_entry(list_head) (list_entry(list_head, sched_info_t, list))
#define get_sched_info_irn(sched_info) get_irn_data_base(sched_info, sched_irn_data_offset)
/**
- * Init the scheduling stuff.
- * To be called from the central backend initialization routine.
+ * Check, if the node is scheduled.
+ * @param irn The node.
+ * @return 1, if the node is scheduled, 0 if not.
*/
-void be_sched_init(void);
+static INLINE int _sched_is_scheduled(const ir_node *irn)
+{
+ return get_irn_sched_info(irn)->scheduled;
+}
/**
* Get the time step of an irn in a schedule.
*/
static INLINE int _sched_get_time_step(const ir_node *irn)
{
+ assert(_sched_is_scheduled(irn));
return get_irn_sched_info(irn)->time_step;
}
* @param irn The node to check for.
* @return 1, if the node consumes/produces data, false if not.
*/
-static INLINE int to_appear_in_schedule(ir_node *irn)
+static INLINE int to_appear_in_schedule(const ir_node *irn)
{
- int i, n;
-
- for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
- ir_node *op = get_irn_n(irn, i);
- if(mode_is_datab(get_irn_mode(op)))
- return 1;
- }
-
- return mode_is_datab(get_irn_mode(irn));
+ switch(get_irn_opcode(irn)) {
+ case iro_Start:
+ case iro_Jmp:
+ case iro_Break:
+ return 1;
+ default:
+ return is_data_node(irn);
+ }
}
/**
*/
static INLINE int _sched_has_next(const ir_node *irn)
{
- const ir_node *block = is_Block(irn) ? irn : get_nodes_block(irn);
+ const ir_node *block = is_Block(irn) ? irn : get_nodes_block(irn);
const sched_info_t *info = get_irn_sched_info(irn);
const sched_info_t *block_info = get_irn_sched_info(block);
return info->list.next != &block_info->list;
*/
static INLINE int _sched_has_prev(const ir_node *irn)
{
- const ir_node *block = is_Block(irn) ? irn : get_nodes_block(irn);
+ const ir_node *block = is_Block(irn) ? irn : get_nodes_block(irn);
const sched_info_t *info = get_irn_sched_info(irn);
const sched_info_t *block_info = get_irn_sched_info(block);
return info->list.prev != &block_info->list;
static INLINE void _sched_set_time_stamp(ir_node *irn)
{
- sched_info_t *inf = get_irn_sched_info(irn);
- sched_timestep_t before_ts = _sched_entry(inf->list.prev)->time_step;
- sched_timestep_t after_ts = _sched_entry(inf->list.next)->time_step;
-
- /*
- * If we are the last, we can give us a big time step,
- * else we have to compute our time step from our
- * neighbours.
- */
- if(before_ts >= after_ts)
- inf->time_step = before_ts + SCHED_INITIAL_GRANULARITY;
- else {
- sched_timestep_t ts = (before_ts + after_ts) / 2;
-
- /*
- * If the resolution went out, we have to renumber
- * this block.
- */
- if(ts == before_ts || ts == after_ts)
- sched_renumber(get_nodes_block(irn));
- else
- inf->time_step = ts;
- }
+ sched_info_t *inf = get_irn_sched_info(irn);
+ sched_timestep_t before_ts = _sched_entry(inf->list.prev)->time_step;
+ sched_timestep_t after_ts = _sched_entry(inf->list.next)->time_step;
+
+ /*
+ * If we are the last, we can give us a big time step,
+ * else we have to compute our time step from our
+ * neighbours.
+ */
+ if(before_ts >= after_ts)
+ inf->time_step = before_ts + SCHED_INITIAL_GRANULARITY;
+ else {
+ sched_timestep_t ts = (before_ts + after_ts) / 2;
+
+ /*
+ * If the resolution went out, we have to renumber
+ * this block.
+ */
+ if(ts == before_ts || ts == after_ts)
+ sched_renumber(get_nodes_block(irn));
+ else
+ inf->time_step = ts;
+ }
}
/**
static INLINE ir_node *_sched_add_before(ir_node *before, ir_node *irn)
{
sched_info_t *info = get_irn_sched_info(irn);
+ assert(_sched_is_scheduled(before) && !_sched_is_scheduled(irn));
list_add_tail(&info->list, &get_irn_sched_info(before)->list);
_sched_set_time_stamp(irn);
info->scheduled = 1;
*/
static INLINE ir_node *_sched_add_after(ir_node *after, ir_node *irn)
{
- sched_info_t *info = get_irn_sched_info(irn);
+ sched_info_t *info = get_irn_sched_info(irn);
+ assert(_sched_is_scheduled(after) && !_sched_is_scheduled(irn));
list_add(&info->list, &get_irn_sched_info(after)->list);
- _sched_set_time_stamp(irn);
- info->scheduled = 1;
+ _sched_set_time_stamp(irn);
+ info->scheduled = 1;
return irn;
}
+static INLINE void _sched_init_block(ir_node *block)
+{
+ sched_info_t *info = get_irn_sched_info(block);
+ assert(info->scheduled == 0 && info->time_step == 0);
+ INIT_LIST_HEAD(&info->list);
+ info->scheduled = 1;
+}
+
+static INLINE void _sched_reset(ir_node *node)
+{
+ sched_info_t *info = get_irn_sched_info(node);
+ info->scheduled = 0;
+}
+
/**
* Remove a node from the scheduled.
* @param irn The node.
{
sched_info_t *info = get_irn_sched_info(irn);
list_del(&info->list);
+ INIT_LIST_HEAD(&info->list);
info->scheduled = 0;
}
-/**
- * Check, if thenode is scheduled.
- * @param irn The node.
- * @return 1, if the node is scheduled, 0 if not.
- */
-static INLINE int _sched_is_scheduled(const ir_node *irn)
-{
- return get_irn_sched_info(irn)->scheduled;
-}
-
/**
* Compare two nodes according to their position in the schedule.
* @param a The first node.
}
/**
- * Verify a schedule.
- * @param block The block whose schedule to verify.
- * @return 1, if the schedule is proper, 0 if not.
- */
-extern int sched_verify(const ir_node *block);
-
-/**
- * Verify the schedules in all blocks of the irg.
- * @param irg The program graph.
- * @return 1, if all schedules were right, 0 if not.
+ * Checks, if one node is scheduled before another.
+ * @param n1 A node.
+ * @param n2 Another node.
+ * @return 1, if n1 is in front of n2 in the schedule, 0 else.
+ * @note Both nodes must be in the same block.
*/
-extern int sched_verify_irg(ir_graph *irg);
+static INLINE int _sched_comes_after(const ir_node *n1, const ir_node *n2)
+{
+ assert(_sched_is_scheduled(n1));
+ assert(_sched_is_scheduled(n2));
+ assert(get_nodes_block(n1) == get_nodes_block(n2));
+ return _sched_get_time_step(n1) < _sched_get_time_step(n2);
+}
/**
* A predicate for a node.
*/
typedef int (sched_predicator_t)(const ir_node *irn, void *data);
-
+/**
+ * Predicate for sched_skip(), returns non-zero if irn is a control flow changing node.
+ *
+ * @param irn the node to evaluate
+ * @param data an arch_env_t * used to determine if irn is a cf
+ * node for the given architecture
+ */
int sched_skip_cf_predicator(const ir_node *irn, void *data);
+
+/**
+ * Predicate for sched_skip(), returns non-zero if irn is a Phi node.
+ *
+ * Used with sched_skip().
+ *
+ * @param irn the node to evaluate
+ * @param data unused
+ */
int sched_skip_phi_predicator(const ir_node *irn, void *data);
/**
* Skip nodes in a schedule.
- * @param from The node to start from.
- * @param forward The direction (1 for forward, 0 for backward).
- * @param predicator The one who decides what is skipped.
- * @param data Food for the predicator.
- * @return The first node rejected by the predicator or the block
- * itself if none was rejected.
+ * @param from The node to start from.
+ * @param forward The direction (1 for forward, 0 for backward).
+ * @param predicator The predicator function which decides what is skipped.
+ * @param data context parameter for the predicator.
+ *
+ * @return The first node not rejected by the predicator or the block
+ * itself if all nodes were rejected.
*/
-extern ir_node *sched_skip(ir_node *from, int forward,
+ir_node *sched_skip(ir_node *from, int forward,
sched_predicator_t *predicator, void *data);
-#define sched_get_time_step(irn) _sched_get_time_step(irn)
-#define sched_has_succ(irn) _sched_has_succ(irn)
-#define sched_has_prev(irn) _sched_has_prev(irn)
-#define sched_succ(irn) _sched_succ(irn)
-#define sched_prev(irn) _sched_prev(irn)
-#define sched_first(irn) _sched_first(irn)
-#define sched_last(irn) _sched_last(irn)
-#define sched_add_before(before, irn) _sched_add_before(before, irn)
-#define sched_add_after(after, irn) _sched_add_after(after, irn)
-#define sched_remove(irn) _sched_remove(irn)
-#define sched_is_scheduled(irn) _sched_is_scheduled(irn)
-#define sched_cmp(a, b) _sched_cmp(a, b)
+#define sched_get_time_step(irn) _sched_get_time_step(irn)
+#define sched_has_next(irn) _sched_has_next(irn)
+#define sched_has_prev(irn) _sched_has_prev(irn)
+#define sched_next(irn) _sched_next(irn)
+#define sched_prev(irn) _sched_prev(irn)
+#define sched_first(irn) _sched_first(irn)
+#define sched_last(irn) _sched_last(irn)
+#define sched_add_before(before, irn) _sched_add_before(before, irn)
+#define sched_add_after(after, irn) _sched_add_after(after, irn)
+#define sched_remove(irn) _sched_remove(irn)
+#define sched_is_scheduled(irn) _sched_is_scheduled(irn)
+#define sched_comes_after(n1, n2) _sched_comes_after(n1, n2)
+#define sched_cmp(a, b) _sched_cmp(a, b)
#endif
projects / libfirm / blobdiff