/* Hooks for cfg representation specific functions.
- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008
- Free Software Foundation, Inc.
+ Copyright (C) 2003-2017 Free Software Foundation, Inc.
Contributed by Sebastian Pop <s.pop@laposte.net>
This file is part of GCC.
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
-/* Only basic-block.h includes this. */
+#ifndef GCC_CFGHOOKS_H
+#define GCC_CFGHOOKS_H
+
+#include "predict.h"
+
+/* Structure to gather statistic about profile consistency, per pass.
+ An array of this structure, indexed by pass static number, is allocated
+ in passes.c. The structure is defined here so that different CFG modes
+ can do their book-keeping via CFG hooks.
+
+ For every field[2], field[0] is the count before the pass runs, and
+ field[1] is the post-pass count. This allows us to monitor the effect
+ of each individual pass on the profile consistency.
+
+ This structure is not supposed to be used by anything other than passes.c
+ and one CFG hook per CFG mode. */
+struct profile_record
+{
+ /* The number of basic blocks where sum(freq) of the block's predecessors
+ doesn't match reasonably well with the incoming frequency. */
+ int num_mismatched_freq_in[2];
+ /* Likewise for a basic block's successors. */
+ int num_mismatched_freq_out[2];
+ /* The number of basic blocks where sum(count) of the block's predecessors
+ doesn't match reasonably well with the incoming frequency. */
+ int num_mismatched_count_in[2];
+ /* Likewise for a basic block's successors. */
+ int num_mismatched_count_out[2];
+ /* A weighted cost of the run-time of the function body. */
+ gcov_type time[2];
+ /* A weighted cost of the size of the function body. */
+ int size[2];
+ /* True iff this pass actually was run. */
+ bool run;
+};
+
struct cfg_hooks
{
/* Debugging. */
int (*verify_flow_info) (void);
- void (*dump_bb) (FILE *, basic_block, int, int);
+ void (*dump_bb) (FILE *, basic_block, int, dump_flags_t);
+ void (*dump_bb_for_graph) (pretty_printer *, basic_block);
/* Basic CFG manipulation. */
in loop versioning. */
bool (*cfg_hook_duplicate_loop_to_header_edge) (struct loop *, edge,
unsigned, sbitmap,
- edge, VEC (edge, heap) **,
+ edge, vec<edge> *,
int);
/* Add condition to new basic block and update CFG used in loop
/* Add PHI arguments queued in PENDINT_STMT list on edge E to edge
E->dest (only in tree-ssa loop versioning. */
void (*flush_pending_stmts) (edge);
+
+ /* True if a block contains no executable instructions. */
+ bool (*empty_block_p) (basic_block);
+
+ /* Split a basic block if it ends with a conditional branch and if
+ the other part of the block is not empty. */
+ basic_block (*split_block_before_cond_jump) (basic_block);
+
+ /* Do book-keeping of a basic block for the profile consistency checker. */
+ void (*account_profile_record) (basic_block, int, struct profile_record *);
};
extern void verify_flow_info (void);
-extern void dump_bb (FILE *, basic_block, int, int);
+
+/* Check control flow invariants, if internal consistency checks are
+ enabled. */
+
+static inline void
+checking_verify_flow_info (void)
+{
+ /* TODO: Add a separate option for -fchecking=cfg. */
+ if (flag_checking)
+ verify_flow_info ();
+}
+
+extern void dump_bb (FILE *, basic_block, int, dump_flags_t);
+extern void dump_bb_for_graph (pretty_printer *, basic_block);
+extern void dump_flow_info (FILE *, dump_flags_t);
+
extern edge redirect_edge_and_branch (edge, basic_block);
extern basic_block redirect_edge_and_branch_force (edge, basic_block);
+extern edge redirect_edge_succ_nodup (edge, basic_block);
extern bool can_remove_branch_p (const_edge);
extern void remove_branch (edge);
extern void remove_edge (edge);
-extern edge split_block (basic_block, void *);
+extern edge split_block (basic_block, rtx);
+extern edge split_block (basic_block, gimple *);
extern edge split_block_after_labels (basic_block);
extern bool move_block_after (basic_block, basic_block);
extern void delete_basic_block (basic_block);
extern basic_block split_edge (edge);
-extern basic_block create_basic_block (void *, void *, basic_block);
+extern basic_block create_basic_block (rtx, rtx, basic_block);
+extern basic_block create_basic_block (gimple_seq, basic_block);
extern basic_block create_empty_bb (basic_block);
extern bool can_merge_blocks_p (basic_block, basic_block);
extern void merge_blocks (basic_block, basic_block);
extern bool can_duplicate_block_p (const_basic_block);
extern basic_block duplicate_block (basic_block, edge, basic_block);
extern bool block_ends_with_call_p (basic_block bb);
+extern bool empty_block_p (basic_block);
+extern basic_block split_block_before_cond_jump (basic_block);
extern bool block_ends_with_condjump_p (const_basic_block bb);
extern int flow_call_edges_add (sbitmap);
extern void execute_on_growing_pred (edge);
unsigned int ndupl,
sbitmap wont_exit,
edge orig,
- VEC (edge, heap) **to_remove,
+ vec<edge> *to_remove,
int flags);
extern void lv_flush_pending_stmts (edge);
extern bool can_copy_bbs_p (basic_block *, unsigned);
extern void copy_bbs (basic_block *, unsigned, basic_block *,
edge *, unsigned, edge *, struct loop *,
- basic_block);
+ basic_block, bool);
-extern void cfg_layout_initialize (unsigned int);
-extern void cfg_layout_finalize (void);
+void account_profile_record (struct profile_record *, int);
/* Hooks containers. */
extern struct cfg_hooks gimple_cfg_hooks;
extern struct cfg_hooks get_cfg_hooks (void);
extern void set_cfg_hooks (struct cfg_hooks);
+#endif /* GCC_CFGHOOKS_H */
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