You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
#ifndef GCC_BASIC_BLOCK_H
#define GCC_BASIC_BLOCK_H
#include "hard-reg-set.h"
#include "predict.h"
#include "vec.h"
-#include "errors.h"
#include "function.h"
/* Head of register set linked list. */
struct loops;
/* Declared in tree-flow.h. */
-struct bb_ann_d;
+struct edge_prediction;
+struct rtl_bb_info;
/* A basic block is a sequence of instructions with only entry and
only one exit. If any one of the instructions are executed, they
/* Basic block information indexed by block number. */
struct basic_block_def GTY((chain_next ("%h.next_bb"), chain_prev ("%h.prev_bb")))
{
- /* The first and last insns of the block. */
- rtx head_;
- rtx end_;
-
/* Pointers to the first and last trees of the block. */
tree stmt_list;
VEC(edge,gc) *preds;
VEC(edge,gc) *succs;
- /* The registers that are live on entry to this block. */
- bitmap GTY ((skip (""))) global_live_at_start;
-
- /* The registers that are live on exit from this block. */
- bitmap GTY ((skip (""))) global_live_at_end;
-
/* Auxiliary info specific to a pass. */
PTR GTY ((skip (""))) aux;
struct basic_block_def *prev_bb;
struct basic_block_def *next_bb;
- /* The data used by basic block copying and reordering functions. */
- struct reorder_block_def * rbi;
+ union basic_block_il_dependent {
+ struct rtl_bb_info * GTY ((tag ("1"))) rtl;
+ } GTY ((desc ("((%1.flags & BB_RTL) != 0)"))) il;
+
+ /* Chain of PHI nodes for this block. */
+ tree phi_nodes;
- /* Annotations used at the tree level. */
- struct bb_ann_d *tree_annotations;
+ /* A list of predictions. */
+ struct edge_prediction *predictions;
/* Expected number of executions: calculated in profile.c. */
gcov_type count;
/* Various flags. See BB_* below. */
int flags;
-
- /* Which section block belongs in, when partitioning basic blocks. */
- int partition;
};
-typedef struct basic_block_def *basic_block;
-
-/* Structure to hold information about the blocks during reordering and
- copying. Needs to be put on a diet. */
-
-struct reorder_block_def GTY(())
+struct rtl_bb_info GTY(())
{
- rtx header;
- rtx footer;
+ /* The first and last insns of the block. */
+ rtx head_;
+ rtx end_;
- basic_block next;
+ /* The registers that are live on entry to this block. */
+ bitmap GTY ((skip (""))) global_live_at_start;
- /* These pointers may be unreliable as the first is only used for
- debugging (and should probably be removed, and the second is only
- used by copying. The basic blocks pointed to may be removed and
- that leaves these pointers pointing to garbage. */
- basic_block GTY ((skip (""))) original;
- basic_block GTY ((skip (""))) copy;
+ /* The registers that are live on exit from this block. */
+ bitmap GTY ((skip (""))) global_live_at_end;
- int duplicated;
- int copy_number;
+ /* In CFGlayout mode points to insn notes/jumptables to be placed just before
+ and after the block. */
+ rtx header;
+ rtx footer;
/* This field is used by the bb-reorder and tracer passes. */
int visited;
};
-typedef struct reorder_block_def *reorder_block_def;
+typedef struct basic_block_def *basic_block;
#define BB_FREQ_MAX 10000
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. */
-enum
+enum bb_flags
{
/* Set if insns in BB have are modified. Used for updating liveness info. */
BB_HOT_PARTITION = 64,
/* Set on blocks that should be put in a cold section. */
- BB_COLD_PARTITION = 128
+ BB_COLD_PARTITION = 128,
+
+ /* Set on block that was duplicated. */
+ BB_DUPLICATED = 256,
+
+ /* Set on blocks that are in RTL format. */
+ BB_RTL = 1024,
+
+ /* Set on blocks that are forwarder blocks.
+ Only used in cfgcleanup.c. */
+ BB_FORWARDER_BLOCK = 2048,
+
+ /* Set on blocks that cannot be threaded through.
+ Only used in cfgcleanup.c. */
+ BB_NONTHREADABLE_BLOCK = 4096
};
/* Dummy flag for convenience in the hot/cold partitioning code. */
#define FOR_ALL_BB(BB) \
for (BB = ENTRY_BLOCK_PTR; BB; BB = BB->next_bb)
-/* Special labels found during CFG build. */
-
-extern GTY(()) rtx label_value_list;
+#define FOR_ALL_BB_FN(BB, FN) \
+ for (BB = ENTRY_BLOCK_PTR_FOR_FUNCTION (FN); BB; BB = BB->next_bb)
extern bitmap_obstack reg_obstack;
\f
/* Stuff for recording basic block info. */
-#define BB_HEAD(B) (B)->head_
-#define BB_END(B) (B)->end_
+#define BB_HEAD(B) (B)->il.rtl->head_
+#define BB_END(B) (B)->il.rtl->end_
/* Special block numbers [markers] for entry and exit. */
#define ENTRY_BLOCK (-1)
edge *index_to_edge;
};
+/* The base value for branch probability notes and edge probabilities. */
+#define REG_BR_PROB_BASE 10000
+
/* This is the value which indicates no edge is present. */
#define EDGE_INDEX_NO_EDGE -1
#define PROP_SCAN_DEAD_STORES 128 /* Scan for dead code. */
#define PROP_ASM_SCAN 256 /* Internal flag used within flow.c
to flag analysis of asms. */
+#define PROP_DEAD_INSN 1024 /* Internal flag used within flow.c
+ to flag analysis of dead insn. */
#define PROP_FINAL (PROP_DEATH_NOTES | PROP_LOG_LINKS \
| PROP_REG_INFO | PROP_KILL_DEAD_CODE \
| PROP_SCAN_DEAD_CODE | PROP_AUTOINC \
extern void rtl_predict_edge (edge, enum br_predictor, int);
extern void predict_edge_def (edge, enum br_predictor, enum prediction);
extern void guess_outgoing_edge_probabilities (basic_block);
+extern void remove_predictions_associated_with_edge (edge);
/* In flow.c */
extern void init_flow (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 */
-extern void initialize_bb_rbi (basic_block bb);
-
/* In dominance.c */
enum cdi_direction
extern void break_superblocks (void);
extern void check_bb_profile (basic_block, FILE *);
extern void update_bb_profile_for_threading (basic_block, int, gcov_type, edge);
+extern void init_rtl_bb_info (basic_block);
+
+extern void initialize_original_copy_tables (void);
+extern void free_original_copy_tables (void);
+extern void set_bb_original (basic_block, basic_block);
+extern basic_block get_bb_original (basic_block);
+extern void set_bb_copy (basic_block, basic_block);
+extern basic_block get_bb_copy (basic_block);
#include "cfghooks.h"
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