/* Control flow graph manipulation code header file.
- Copyright (C) 2014-2016 Free Software Foundation, Inc.
+ Copyright (C) 2014-2021 Free Software Foundation, Inc.
This file is part of GCC.
/* Maximal number of entities in the single jumptable. Used to estimate
final flowgraph size. */
int max_jumptable_ents;
+
+ /* Maximal count of BB in function. */
+ profile_count count_max;
+
+ /* Dynamically allocated edge/bb flags. */
+ int edge_flags_allocated;
+ int bb_flags_allocated;
};
extern void init_flow (function *);
-extern void clear_edges (function *);
+extern void free_cfg (function *);
extern basic_block alloc_block (void);
extern void link_block (basic_block, basic_block);
extern void unlink_block (basic_block);
extern void redirect_edge_succ (edge, basic_block);
extern void redirect_edge_pred (edge, basic_block);
extern void clear_bb_flags (void);
-extern void dump_edge_info (FILE *, edge, int, int);
+extern void dump_edge_info (FILE *, edge, dump_flags_t, int);
extern void debug (edge_def &ref);
extern void debug (edge_def *ptr);
extern void alloc_aux_for_blocks (int);
extern void free_aux_for_edges (void);
extern void debug_bb (basic_block);
extern basic_block debug_bb_n (int);
-extern void dump_bb_info (FILE *, basic_block, int, int, bool, bool);
-extern void brief_dump_cfg (FILE *, int);
-extern void update_bb_profile_for_threading (basic_block, int, gcov_type, edge);
-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);
+extern void debug_bb (basic_block, dump_flags_t);
+extern basic_block debug_bb_n (int, dump_flags_t);
+extern void dump_bb_info (FILE *, basic_block, int, dump_flags_t, bool, bool);
+extern void brief_dump_cfg (FILE *, dump_flags_t);
+extern void update_bb_profile_for_threading (basic_block, profile_count, edge);
+extern void scale_bbs_frequencies_profile_count (basic_block *, int,
+ profile_count, profile_count);
+extern void scale_bbs_frequencies (basic_block *, int, profile_probability);
extern void initialize_original_copy_tables (void);
+extern void reset_original_copy_tables (void);
extern void free_original_copy_tables (void);
+extern bool original_copy_tables_initialized_p (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);
-void set_loop_copy (struct loop *, struct loop *);
-struct loop *get_loop_copy (struct loop *);
+void set_loop_copy (class loop *, class loop *);
+class loop *get_loop_copy (class loop *);
+
+/* Generic RAII class to allocate a bit from storage of integer type T.
+ The allocated bit is accessible as mask with the single bit set
+ via the conversion operator to T. */
+
+template <class T>
+class auto_flag
+{
+public:
+ /* static assert T is integer type of max HOST_WIDE_INT precision. */
+ auto_flag (T *sptr)
+ {
+ m_sptr = sptr;
+ int free_bit = ffs_hwi (~*sptr);
+ /* If there are no unset bits... */
+ if (free_bit == 0)
+ gcc_unreachable ();
+ m_flag = HOST_WIDE_INT_1U << (free_bit - 1);
+ /* ...or if T is signed and thus the complement is sign-extended,
+ check if we ran out of bits. We could spare us this bit
+ if we could use C++11 std::make_unsigned<T>::type to pass
+ ~*sptr to ffs_hwi. */
+ if (m_flag == 0)
+ gcc_unreachable ();
+ gcc_checking_assert ((*sptr & m_flag) == 0);
+ *sptr |= m_flag;
+ }
+ ~auto_flag ()
+ {
+ gcc_checking_assert ((*m_sptr & m_flag) == m_flag);
+ *m_sptr &= ~m_flag;
+ }
+ operator T () const { return m_flag; }
+private:
+ T *m_sptr;
+ T m_flag;
+};
+
+/* RAII class to allocate an edge flag for temporary use. You have
+ to clear the flag from all edges when you are finished using it. */
+
+class auto_edge_flag : public auto_flag<int>
+{
+public:
+ auto_edge_flag (function *fun)
+ : auto_flag<int> (&fun->cfg->edge_flags_allocated) {}
+};
+
+/* RAII class to allocate a bb flag for temporary use. You have
+ to clear the flag from all edges when you are finished using it. */
+class auto_bb_flag : public auto_flag<int>
+{
+public:
+ auto_bb_flag (function *fun)
+ : auto_flag<int> (&fun->cfg->bb_flags_allocated) {}
+};
#endif /* GCC_CFG_H */