84 lines
3.2 KiB
C
84 lines
3.2 KiB
C
/* Hooks for cfg representation specific functions.
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Copyright (C) 2003 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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/* Debugging. Do not use macros to hook these so they can be called from
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debugger! */
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int (*cfgh_verify_flow_info) (void);
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void (*dump_bb) (basic_block, FILE *);
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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 given basic block and all edges possibly pointing into it. */
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void (*delete_block) (basic_block);
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/* Split basic block B after specified instruction I. */
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edge (*split_block) (basic_block b, void * i);
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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 (*cfgh_split_edge) (edge);
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};
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#define redirect_edge_and_branch(e,b) cfg_hooks->redirect_edge_and_branch (e,b)
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#define redirect_edge_and_branch_force(e,b) cfg_hooks->redirect_edge_and_branch_force (e,b)
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#define split_block(e,i) cfg_hooks->split_block (e,i)
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#define delete_block(b) cfg_hooks->delete_block (b)
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#define split_edge(e) cfg_hooks->cfgh_split_edge (e)
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#define create_basic_block(h,e,a) cfg_hooks->create_basic_block (h,e,a)
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#define can_merge_blocks_p(a,b) cfg_hooks->can_merge_blocks_p (a,b)
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#define merge_blocks(a,b) cfg_hooks->merge_blocks (a,b)
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/* Hooks containers. */
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extern struct cfg_hooks rtl_cfg_hooks;
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/* A pointer to one of the hooks containers. */
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extern struct cfg_hooks *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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