/* Masks for basic_block.flags.
- BB_VISITED should not be used by passes, it is used internally by
- dfs_enumerate_from.
-
BB_HOT_PARTITION and BB_COLD_PARTITION should be preserved throughout
the compilation, so they are never cleared.
All other flags may be cleared by clear_bb_flags(). It is generally
a bad idea to rely on any flags being up-to-date. */
-/* Set if insns in BB have are modified. Used for updating liveness info. */
-#define BB_DIRTY 1
+enum
+{
-/* Only set on blocks that have just been created by create_bb. */
-#define BB_NEW 2
+ /* Set if insns in BB have are modified. Used for updating liveness info. */
+ BB_DIRTY = 1,
-/* Set by find_unreachable_blocks. Do not rely on this being set in any
- pass. */
-#define BB_REACHABLE 4
+ /* Only set on blocks that have just been created by create_bb. */
+ BB_NEW = 2,
-/* Used by dfs_enumerate_from to keep track of visited basic blocks. */
-#define BB_VISITED 8
+ /* Set by find_unreachable_blocks. Do not rely on this being set in any
+ pass. */
+ BB_REACHABLE = 4,
-/* Set for blocks in an irreducible loop by loop analysis. */
-#define BB_IRREDUCIBLE_LOOP 16
+ /* Set for blocks in an irreducible loop by loop analysis. */
+ BB_IRREDUCIBLE_LOOP = 8,
-/* Set on blocks that may actually not be single-entry single-exit block. */
-#define BB_SUPERBLOCK 32
+ /* Set on blocks that may actually not be single-entry single-exit block. */
+ BB_SUPERBLOCK = 16,
-/* Set on basic blocks that the scheduler should not touch. This is used
- by SMS to prevent other schedulers from messing with the loop schedule. */
-#define BB_DISABLE_SCHEDULE 64
+ /* Set on basic blocks that the scheduler should not touch. This is used
+ by SMS to prevent other schedulers from messing with the loop schedule. */
+ BB_DISABLE_SCHEDULE = 32,
-/* Set on blocks that should be put in a hot section. */
-#define BB_HOT_PARTITION 128
+ /* Set on blocks that should be put in a hot section. */
+ BB_HOT_PARTITION = 64,
-/* Set on blocks that should be put in a cold section. */
-#define BB_COLD_PARTITION 256
+ /* Set on blocks that should be put in a cold section. */
+ BB_COLD_PARTITION = 128
+};
/* Dummy flag for convenience in the hot/cold partitioning code. */
#define BB_UNPARTITIONED 0
extern int n_edges;
+/* TRUE if we should re-run loop discovery after threading jumps, FALSE
+ otherwise. */
+extern bool rediscover_loops_after_threading;
+
/* Signalize the status of profile information in the CFG. */
extern enum profile_status
{
#define FOR_ALL_BB(BB) \
for (BB = ENTRY_BLOCK_PTR; BB; BB = BB->next_bb)
-/* What registers are live at the setjmp call. */
-
-extern regset regs_live_at_setjmp;
-
/* Special labels found during CFG build. */
extern GTY(()) rtx label_value_list;
extern void add_noreturn_fake_exit_edges (void);
extern void connect_infinite_loops_to_exit (void);
extern edge unchecked_make_edge (basic_block, basic_block, int);
-extern edge cached_make_edge (sbitmap *, basic_block, basic_block, int);
+extern edge cached_make_edge (sbitmap, basic_block, basic_block, int);
extern edge make_edge (basic_block, basic_block, int);
extern edge make_single_succ_edge (basic_block, basic_block, int);
extern void remove_edge (edge);
extern void brief_dump_cfg (FILE *);
extern void clear_edges (void);
extern rtx first_insn_after_basic_block_note (basic_block);
+extern void scale_bbs_frequencies_int (basic_block *, int, int, int);
+extern void scale_bbs_frequencies_gcov_type (basic_block *, int, gcov_type,
+ gcov_type);
/* Structure to group all of the information to process IF-THEN and
IF-THEN-ELSE blocks for the conditional execution support. This
#define EDGE_PRED(bb,i) VEC_index (edge, (bb)->preds, (i))
#define EDGE_SUCC(bb,i) VEC_index (edge, (bb)->succs, (i))
+/* Returns true if BB has precisely one successor. */
+
+static inline bool
+single_succ_p (basic_block bb)
+{
+ return EDGE_COUNT (bb->succs) == 1;
+}
+
+/* Returns true if BB has precisely one predecessor. */
+
+static inline bool
+single_pred_p (basic_block bb)
+{
+ return EDGE_COUNT (bb->preds) == 1;
+}
+
+/* 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)
+{
+ gcc_assert (single_succ_p (bb));
+ return EDGE_SUCC (bb, 0);
+}
+
+/* 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)
+{
+ gcc_assert (single_pred_p (bb));
+ return EDGE_PRED (bb, 0);
+}
+
+/* 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. Aborts
+ if BB does not have exactly one predecessor.*/
+
+static inline basic_block
+single_pred (basic_block bb)
+{
+ return single_pred_edge (bb)->src;
+}
+
/* Iterator object for edges. */
typedef struct {
extern bool forwarder_block_p (basic_block);
extern bool purge_all_dead_edges (int);
extern bool purge_dead_edges (basic_block);
-extern void find_sub_basic_blocks (basic_block);
extern void find_many_sub_basic_blocks (sbitmap);
-extern void rtl_make_eh_edge (sbitmap *, basic_block, rtx);
+extern void rtl_make_eh_edge (sbitmap, basic_block, rtx);
extern bool can_fallthru (basic_block, basic_block);
extern bool could_fall_through (basic_block, basic_block);
extern void flow_nodes_print (const char *, const sbitmap, FILE *);
extern void alloc_aux_for_edges (int);
extern void clear_aux_for_edges (void);
extern void free_aux_for_edges (void);
-extern void find_basic_blocks (rtx, int, FILE *);
+extern void find_basic_blocks (rtx);
extern bool cleanup_cfg (int);
extern bool delete_unreachable_blocks (void);
extern bool merge_seq_blocks (void);
/* In bb-reorder.c */
extern void reorder_basic_blocks (unsigned int);
+extern void duplicate_computed_gotos (void);
extern void partition_hot_cold_basic_blocks (void);
/* In cfg.c */
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