/* Define control and data flow tables, and regsets.
- Copyright (C) 1987, 1997, 1998, 1999, 2000, 2001
+ Copyright (C) 1987, 1997, 1998, 1999, 2000, 2001, 2002
Free Software Foundation, Inc.
This file is part of GCC.
typedef bitmap regset;
/* Initialize a new regset. */
-#define INIT_REG_SET(HEAD) bitmap_initialize (HEAD)
+#define INIT_REG_SET(HEAD) bitmap_initialize (HEAD, 1)
/* Clear a register set by freeing up the linked list. */
#define CLEAR_REG_SET(HEAD) bitmap_clear (HEAD)
#define OBSTACK_ALLOC_REG_SET(OBSTACK) BITMAP_OBSTACK_ALLOC (OBSTACK)
/* Initialize a register set. Returns the new register set. */
-#define INITIALIZE_REG_SET(HEAD) bitmap_initialize (&HEAD)
+#define INITIALIZE_REG_SET(HEAD) bitmap_initialize (&HEAD, 1)
/* Do any cleanup needed on a regset when it is no longer used. */
#define FREE_REG_SET(REGSET) BITMAP_FREE(REGSET)
#define EDGE_EH 8
#define EDGE_FAKE 16
#define EDGE_DFS_BACK 32
+#define EDGE_CAN_FALLTHRU 64
#define EDGE_COMPLEX (EDGE_ABNORMAL | EDGE_ABNORMAL_CALL | EDGE_EH)
/* The index of this block. */
int index;
+ /* Previous and next blocks in the chain. */
+ struct basic_block_def *prev_bb, *next_bb;
+
/* The loop depth of this block. */
int loop_depth;
+ /* Outermost loop containing the block. */
+ struct loop *loop_father;
+
/* Expected number of executions: calculated in profile.c. */
gcov_type count;
#define BB_FREQ_MAX 10000
/* Masks for basic_block.flags. */
-#define BB_REACHABLE 1
+#define BB_DIRTY 1
+#define BB_NEW 2
+#define BB_REACHABLE 4
+#define BB_VISITED 8
/* Number of basic blocks in the current function. */
extern int n_basic_blocks;
+/* First free basic block number. */
+
+extern int last_basic_block;
+
/* Number of edges in the current function. */
extern int n_edges;
#define BASIC_BLOCK(N) (VARRAY_BB (basic_block_info, (N)))
+/* For iterating over basic blocks. */
+#define FOR_BB_BETWEEN(BB, FROM, TO, DIR) \
+ for (BB = FROM; BB != TO; BB = BB->DIR)
+
+#define FOR_EACH_BB(BB) \
+ FOR_BB_BETWEEN (BB, ENTRY_BLOCK_PTR->next_bb, EXIT_BLOCK_PTR, next_bb)
+
+#define FOR_EACH_BB_REVERSE(BB) \
+ FOR_BB_BETWEEN (BB, EXIT_BLOCK_PTR->prev_bb, ENTRY_BLOCK_PTR, prev_bb)
+
/* What registers are live at the setjmp call. */
extern regset regs_live_at_setjmp;
#define ENTRY_BLOCK_PTR (&entry_exit_blocks[0])
#define EXIT_BLOCK_PTR (&entry_exit_blocks[1])
-extern varray_type basic_block_for_insn;
-#define BLOCK_FOR_INSN(INSN) VARRAY_BB (basic_block_for_insn, INSN_UID (INSN))
#define BLOCK_NUM(INSN) (BLOCK_FOR_INSN (INSN)->index + 0)
+#define set_block_for_insn(INSN, BB) (BLOCK_FOR_INSN (INSN) = BB)
-extern void compute_bb_for_insn PARAMS ((int));
+extern void compute_bb_for_insn PARAMS ((void));
extern void free_bb_for_insn PARAMS ((void));
extern void update_bb_for_insn PARAMS ((basic_block));
-extern void set_block_for_insn PARAMS ((rtx, basic_block));
extern void free_basic_block_vars PARAMS ((int));
extern edge split_block PARAMS ((basic_block, rtx));
extern basic_block split_edge PARAMS ((edge));
extern void insert_insn_on_edge PARAMS ((rtx, edge));
+
extern void commit_edge_insertions PARAMS ((void));
+extern void commit_edge_insertions_watch_calls PARAMS ((void));
+
extern void remove_fake_edges PARAMS ((void));
extern void add_noreturn_fake_exit_edges PARAMS ((void));
extern void connect_infinite_loops_to_exit PARAMS ((void));
extern void redirect_edge_succ PARAMS ((edge, basic_block));
extern edge redirect_edge_succ_nodup PARAMS ((edge, basic_block));
extern void redirect_edge_pred PARAMS ((edge, basic_block));
-extern basic_block create_basic_block_structure PARAMS ((int, rtx, rtx, rtx));
-extern basic_block create_basic_block PARAMS ((int, rtx, rtx));
+extern basic_block create_basic_block_structure PARAMS ((rtx, rtx, rtx, basic_block));
+extern basic_block create_basic_block PARAMS ((rtx, rtx, basic_block));
extern int flow_delete_block PARAMS ((basic_block));
+extern int flow_delete_block_noexpunge PARAMS ((basic_block));
+extern void clear_bb_flags PARAMS ((void));
extern void merge_blocks_nomove PARAMS ((basic_block, basic_block));
extern void tidy_fallthru_edge PARAMS ((edge, basic_block,
basic_block));
extern void mark_critical_edges PARAMS ((void));
extern rtx first_insn_after_basic_block_note PARAMS ((basic_block));
+/* Dominator information for basic blocks. */
+
+typedef struct dominance_info *dominance_info;
+
/* Structure to hold information for each natural loop. */
struct loop
{
/* The loop nesting depth. */
int depth;
+ /* Superloops of the loop. */
+ struct loop **pred;
+
/* The height of the loop (enclosed loop levels) within the loop
hierarchy tree. */
int level;
/* Link to the next (sibling) loop. */
struct loop *next;
- /* Non-zero if the loop shares a header with another loop. */
- int shared;
-
/* Non-zero if the loop is invalid (e.g., contains setjmp.). */
int invalid;
will find the inner loops before their enclosing outer loops). */
struct loop *array;
+ /* The above array is unused in new loop infrastructure and is kept only for
+ purposes of the old loop optimizer. Instead we store just pointers to
+ loops here. */
+ struct loop **parray;
+
/* Pointer to root of loop heirachy tree. */
struct loop *tree_root;
struct cfg
{
/* The bitmap vector of dominators or NULL if not computed. */
- sbitmap *dom;
+ dominance_info dom;
/* The ordering of the basic blocks in a depth first search. */
int *dfs_order;
void (*)(const struct loop *,
FILE *, int), int));
extern int flow_loop_scan PARAMS ((struct loops *, struct loop *, int));
+extern void flow_loop_tree_node_add PARAMS ((struct loop *, struct loop *));
+extern void flow_loop_tree_node_remove PARAMS ((struct loop *));
/* This structure maintains an edge list vector. */
struct edge_list
by dead code removal. */
#define PROP_AUTOINC 64 /* Create autoinc mem references. */
#define PROP_EQUAL_NOTES 128 /* Take into account REG_EQUAL notes. */
-#define PROP_FINAL 127 /* All of the above. */
+#define PROP_SCAN_DEAD_STORES 256 /* Scan for dead code. */
+#define PROP_FINAL (PROP_DEATH_NOTES | PROP_LOG_LINKS \
+ | PROP_REG_INFO | PROP_KILL_DEAD_CODE \
+ | PROP_SCAN_DEAD_CODE | PROP_AUTOINC \
+ | PROP_ALLOW_CFG_CHANGES \
+ | PROP_SCAN_DEAD_STORES)
#define CLEANUP_EXPENSIVE 1 /* Do relativly expensive optimizations
except for edge forwarding */
notes. */
#define CLEANUP_UPDATE_LIFE 32 /* Keep life information up to date. */
#define CLEANUP_THREADING 64 /* Do jump threading. */
+#define CLEANUP_NO_INSN_DEL 128 /* Do not try to delete trivially dead
+ insns. */
/* Flags for loop discovery. */
#define LOOP_TREE 1 /* Build loop hierarchy tree. */
#define LOOP_ENTRY_EDGES 4 /* Find entry edges. */
#define LOOP_EXIT_EDGES 8 /* Find exit edges. */
#define LOOP_EDGES (LOOP_ENTRY_EDGES | LOOP_EXIT_EDGES)
-#define LOOP_EXITS_DOMS 16 /* Find nodes that dom. all exits. */
-#define LOOP_ALL 31 /* All of the above */
+#define LOOP_ALL 15 /* All of the above */
extern void life_analysis PARAMS ((rtx, FILE *, int));
-extern void update_life_info PARAMS ((sbitmap, enum update_life_extent,
+extern int update_life_info PARAMS ((sbitmap, enum update_life_extent,
int));
+extern int update_life_info_in_dirty_blocks PARAMS ((enum update_life_extent,
+ int));
extern int count_or_remove_death_notes PARAMS ((sbitmap, int));
extern int propagate_block PARAMS ((basic_block, regset, regset, regset,
int));
/* In predict.c */
extern void estimate_probability PARAMS ((struct loops *));
+extern void note_prediction_to_br_prob PARAMS ((void));
extern void expected_value_to_br_prob PARAMS ((void));
+extern void note_prediction_to_br_prob PARAMS ((void));
+extern bool maybe_hot_bb_p PARAMS ((basic_block));
+extern bool probably_cold_bb_p PARAMS ((basic_block));
+extern bool probably_never_executed_bb_p PARAMS ((basic_block));
/* In flow.c */
extern void init_flow PARAMS ((void));
extern void allocate_reg_life_data PARAMS ((void));
extern void allocate_bb_life_data PARAMS ((void));
extern void expunge_block PARAMS ((basic_block));
+extern void link_block PARAMS ((basic_block, basic_block));
+extern void unlink_block PARAMS ((basic_block));
+extern void compact_blocks PARAMS ((void));
extern basic_block alloc_block PARAMS ((void));
extern void find_unreachable_blocks PARAMS ((void));
-extern void delete_noop_moves PARAMS ((rtx));
+extern int delete_noop_moves PARAMS ((rtx));
extern basic_block redirect_edge_and_branch_force PARAMS ((edge, basic_block));
extern basic_block force_nonfallthru PARAMS ((edge));
extern bool redirect_edge_and_branch PARAMS ((edge, basic_block));
debugger, and it is declared extern so we don't get warnings about
it being unused. */
extern void verify_flow_info PARAMS ((void));
-extern int flow_loop_outside_edge_p PARAMS ((const struct loop *, edge));
+extern bool flow_loop_outside_edge_p PARAMS ((const struct loop *, edge));
+extern bool flow_loop_nested_p PARAMS ((const struct loop *, const struct loop *));
+extern bool flow_bb_inside_loop_p PARAMS ((const struct loop *, basic_block));
+extern basic_block *get_loop_body PARAMS ((const struct loop *));
+extern int dfs_enumerate_from PARAMS ((basic_block, int,
+ bool (*)(basic_block, void *),
+ basic_block *, int, void *));
+
+extern edge loop_preheader_edge PARAMS ((struct loop *));
+extern edge loop_latch_edge PARAMS ((struct loop *));
+
+extern void add_bb_to_loop PARAMS ((basic_block, struct loop *));
+extern void remove_bb_from_loops PARAMS ((basic_block));
+extern struct loop * find_common_loop PARAMS ((struct loop *, struct loop *));
+
+extern void verify_loop_structure PARAMS ((struct loops *, int));
+#define VLS_EXPECT_PREHEADERS 1
+#define VLS_EXPECT_SIMPLE_LATCHES 2
typedef struct conflict_graph_def *conflict_graph;
PARAMS ((regset,
partition));
extern bool mark_dfs_back_edges PARAMS ((void));
+extern void set_edge_can_fallthru_flag PARAMS ((void));
extern void update_br_prob_note PARAMS ((basic_block));
+extern void fixup_abnormal_edges PARAMS ((void));
+extern bool can_hoist_insn_p PARAMS ((rtx, rtx, regset));
+extern rtx hoist_insn_after PARAMS ((rtx, rtx, rtx, rtx));
+extern rtx hoist_insn_to_edge PARAMS ((rtx, edge, rtx, rtx));
/* In dominance.c */
CDI_POST_DOMINATORS
};
-extern void calculate_dominance_info PARAMS ((int *, sbitmap *,
- enum cdi_direction));
-
+extern dominance_info calculate_dominance_info PARAMS ((enum cdi_direction));
+extern void free_dominance_info PARAMS ((dominance_info));
+extern basic_block nearest_common_dominator PARAMS ((dominance_info,
+ basic_block, basic_block));
+extern void set_immediate_dominator PARAMS ((dominance_info,
+ basic_block, basic_block));
+extern basic_block get_immediate_dominator PARAMS ((dominance_info,
+ basic_block));
+extern bool dominated_by_p PARAMS ((dominance_info, basic_block, basic_block));
+extern int get_dominated_by PARAMS ((dominance_info, basic_block, basic_block **));
+extern void add_to_dominance_info PARAMS ((dominance_info, basic_block));
+extern void delete_from_dominance_info PARAMS ((dominance_info, basic_block));
+basic_block recount_dominator PARAMS ((dominance_info, basic_block));
+extern void redirect_immediate_dominators PARAMS ((dominance_info, basic_block,
+ basic_block));
+void iterate_fix_dominators PARAMS ((dominance_info, basic_block *, int));
+extern void verify_dominators PARAMS ((dominance_info));
#endif /* GCC_BASIC_BLOCK_H */