/* Hooks for cfg representation specific functions.
- Copyright (C) 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004 Free Software Foundation, Inc.
Contributed by Sebastian Pop <s.pop@laposte.net>
This file is part of GCC.
struct cfg_hooks
{
- /* Debugging. Do not use macros to hook these so they can be called from
- debugger! */
- void (*cfgh_verify_flow_info) PARAMS ((void));
+ /* 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 easilly redirectable for
+ representation. Returns false when edge is not easily redirectable for
whatever reason. */
- bool (*redirect_edge_and_branch) PARAMS ((edge e, basic_block b));
+ 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)PARAMS ((edge, basic_block));
+ 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);
- /* Remove given basic block and all edges possibly pointing into it. */
- void (*delete_block)PARAMS ((basic_block));
+ /* Move block B immediately after block A. */
+ bool (*move_block_after) (basic_block b, basic_block a);
- /* Split basic block B after specified instruction I. */
- edge (*split_block) PARAMS ((basic_block b, void * i));
+ /* 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 (*cfgh_split_edge) PARAMS ((edge));
+ basic_block (*split_edge) (edge);
+ void (*make_forwarder_block) (edge);
+
+ /* Tries to make the edge fallthru. */
+ void (*tidy_fallthru_edge) (edge);
};
-#define redirect_edge_and_branch(e,b) cfg_hooks->redirect_edge_and_branch (e,b)
-#define redirect_edge_and_branch_force(e,b) cfg_hooks->redirect_edge_and_branch_force (e,b)
-#define split_block(e,i) cfg_hooks->split_block (e,i)
-#define delete_block(b) cfg_hooks->delete_block (b)
-#define split_edge(e) cfg_hooks->cfgh_split_edge (e)
+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;
-
-/* A pointer to one of the hooks containers. */
-extern struct cfg_hooks *cfg_hooks;
+extern struct cfg_hooks cfg_layout_rtl_cfg_hooks;
/* Declarations. */
-extern void rtl_register_cfg_hooks PARAMS ((void));
-extern void cfg_layout_rtl_register_cfg_hooks PARAMS ((void));
+extern void rtl_register_cfg_hooks (void);
+extern void cfg_layout_rtl_register_cfg_hooks (void);
#endif /* GCC_CFGHOOKS_H */
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