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/* Hooks for cfg representation specific functions.
Copyright (C) 2003 Free Software Foundation, Inc.
Contributed by Sebastian Pop <s.pop@laposte.net>
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
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. */
#ifndef GCC_CFGHOOKS_H
#define GCC_CFGHOOKS_H
struct cfg_hooks
{
/* Name of the corresponding ir. */
const char *name;
/* Debugging. */
int (*verify_flow_info) (void);
void (*dump_bb) (basic_block, FILE *, int);
/* Basic CFG manipulation. */
/* Return new basic block. */
basic_block (*create_basic_block) (void *head, void *end, basic_block after);
/* Redirect edge E to the given basic block B and update underlying program
representation. Returns false when edge is not easily redirectable for
whatever reason. */
bool (*redirect_edge_and_branch) (edge e, basic_block b);
/* Same as the above but allows redirecting of fallthru edges. In that case
newly created forwarder basic block is returned. It aborts when called
on abnormal edge. */
basic_block (*redirect_edge_and_branch_force) (edge, basic_block);
/* Remove statements corresponding to a given basic block. */
void (*delete_basic_block) (basic_block);
/* Creates a new basic block just after basic block B by splitting
everything after specified instruction I. */
basic_block (*split_block) (basic_block b, void * i);
/* Move block B immediately after block A. */
bool (*move_block_after) (basic_block b, basic_block a);
/* Return true when blocks A and B can be merged into single basic block. */
bool (*can_merge_blocks_p) (basic_block a, basic_block b);
/* Merge blocks A and B. */
void (*merge_blocks) (basic_block a, basic_block b);
/* Higher level functions representable by primitive operations above if
we didn't have some oddities in RTL and Tree representations. */
basic_block (*split_edge) (edge);
void (*make_forwarder_block) (edge);
/* Tries to make the edge fallthru. */
void (*tidy_fallthru_edge) (edge);
};
extern void verify_flow_info (void);
extern void dump_bb (basic_block, FILE *, int);
extern bool redirect_edge_and_branch (edge, basic_block);
extern basic_block redirect_edge_and_branch_force (edge, basic_block);
extern edge split_block (basic_block, void *);
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_empty_bb (basic_block);
extern bool can_merge_blocks_p (basic_block, basic_block);
extern void merge_blocks (basic_block, basic_block);
extern edge make_forwarder_block (basic_block, bool (*)(edge),
void (*) (basic_block));
extern void tidy_fallthru_edge (edge);
extern void tidy_fallthru_edges (void);
/* Hooks containers. */
extern struct cfg_hooks rtl_cfg_hooks;
extern struct cfg_hooks cfg_layout_rtl_cfg_hooks;
/* Declarations. */
extern void rtl_register_cfg_hooks (void);
extern void cfg_layout_rtl_register_cfg_hooks (void);
#endif /* GCC_CFGHOOKS_H */
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