2005-03-11 Zdenek Dvorak <dvorakz@suse.cz>
* basic-block.h (single_succ_p, single_pred_p, single_succ_edge,
+ single_pred_edge, single_succ, single_pred): Improve comments.
+
+2005-03-11 Zdenek Dvorak <dvorakz@suse.cz>
+
+ * basic-block.h (single_succ_p, single_pred_p, single_succ_edge,
single_pred_edge, single_succ, single_pred): New inline functions.
* bb-reorder.c (rotate_loop, find_traces_1_round,
add_labels_and_missing_jumps, fix_up_fall_thru_edges,
return EDGE_COUNT (bb->preds) == 1;
}
-/* Returns the single successor edge of basic block BB. */
+/* Returns the single successor edge of basic block BB. Aborts if
+ BB does not have exactly one successor. */
static inline edge
single_succ_edge (basic_block bb)
return EDGE_SUCC (bb, 0);
}
-/* Returns the single predecessor edge of basic block BB. */
+/* Returns the single predecessor edge of basic block BB. Aborts
+ if BB does not have exactly one predecessor. */
static inline edge
single_pred_edge (basic_block bb)
return EDGE_PRED (bb, 0);
}
-/* Returns the single successor block of basic block BB. */
+/* Returns the single successor block of basic block BB. Aborts
+ if BB does not have exactly one successor. */
static inline basic_block
single_succ (basic_block bb)
return single_succ_edge (bb)->dest;
}
-/* Returns the single predecessor block of basic block BB. */
+/* Returns the single predecessor block of basic block BB. Aborts
+ if BB does not have exactly one predecessor.*/
static inline basic_block
single_pred (basic_block bb)