101 lines
3.7 KiB
C
101 lines
3.7 KiB
C
/* Hooks for cfg representation specific functions.
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Copyright (C) 2003, 2004 Free Software Foundation, Inc.
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Contributed by Sebastian Pop <s.pop@laposte.net>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef GCC_CFGHOOKS_H
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#define GCC_CFGHOOKS_H
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struct cfg_hooks
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{
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/* Name of the corresponding ir. */
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const char *name;
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/* Debugging. */
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int (*verify_flow_info) (void);
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void (*dump_bb) (basic_block, FILE *, int);
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/* Basic CFG manipulation. */
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/* Return new basic block. */
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basic_block (*create_basic_block) (void *head, void *end, basic_block after);
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/* Redirect edge E to the given basic block B and update underlying program
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representation. Returns false when edge is not easily redirectable for
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whatever reason. */
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bool (*redirect_edge_and_branch) (edge e, basic_block b);
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/* Same as the above but allows redirecting of fallthru edges. In that case
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newly created forwarder basic block is returned. It aborts when called
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on abnormal edge. */
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basic_block (*redirect_edge_and_branch_force) (edge, basic_block);
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/* Remove statements corresponding to a given basic block. */
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void (*delete_basic_block) (basic_block);
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/* Creates a new basic block just after basic block B by splitting
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everything after specified instruction I. */
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basic_block (*split_block) (basic_block b, void * i);
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/* Move block B immediately after block A. */
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bool (*move_block_after) (basic_block b, basic_block a);
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/* Return true when blocks A and B can be merged into single basic block. */
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bool (*can_merge_blocks_p) (basic_block a, basic_block b);
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/* Merge blocks A and B. */
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void (*merge_blocks) (basic_block a, basic_block b);
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/* Higher level functions representable by primitive operations above if
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we didn't have some oddities in RTL and Tree representations. */
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basic_block (*split_edge) (edge);
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void (*make_forwarder_block) (edge);
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/* Tries to make the edge fallthru. */
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void (*tidy_fallthru_edge) (edge);
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};
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extern void verify_flow_info (void);
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extern void dump_bb (basic_block, FILE *, int);
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extern bool redirect_edge_and_branch (edge, basic_block);
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extern basic_block redirect_edge_and_branch_force (edge, basic_block);
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extern edge split_block (basic_block, void *);
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extern edge split_block_after_labels (basic_block);
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extern bool move_block_after (basic_block, basic_block);
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extern void delete_basic_block (basic_block);
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extern basic_block split_edge (edge);
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extern basic_block create_basic_block (void *, void *, basic_block);
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extern basic_block create_empty_bb (basic_block);
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extern bool can_merge_blocks_p (basic_block, basic_block);
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extern void merge_blocks (basic_block, basic_block);
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extern edge make_forwarder_block (basic_block, bool (*)(edge),
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void (*) (basic_block));
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extern void tidy_fallthru_edge (edge);
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extern void tidy_fallthru_edges (void);
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/* Hooks containers. */
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extern struct cfg_hooks rtl_cfg_hooks;
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extern struct cfg_hooks cfg_layout_rtl_cfg_hooks;
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/* Declarations. */
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extern void rtl_register_cfg_hooks (void);
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extern void cfg_layout_rtl_register_cfg_hooks (void);
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#endif /* GCC_CFGHOOKS_H */
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