2007-05-24 H.J. Lu <hongjiu.lu@intel.com>

[pf3gnuchains/gcc-fork.git] / gcc / cfghooks.h

diff --git a/gcc/cfghooks.h b/gcc/cfghooks.h
index 92a458e..bd7d1b3 100644 (file)
--- a/gcc/cfghooks.h
+++ b/gcc/cfghooks.h
@@ -1,5 +1,5 @@
 /* Hooks for cfg representation specific functions.
-   Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
    Contributed by Sebastian Pop <s.pop@laposte.net>
 
 This file is part of GCC.
@@ -16,8 +16,8 @@ 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.  */
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA.  */
 
 #ifndef GCC_CFGHOOKS_H
 #define GCC_CFGHOOKS_H
@@ -43,10 +43,14 @@ struct cfg_hooks
   edge (*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.  */
+     newly created forwarder basic block is returned.  The edge must
+     not be abnormal.  */
   basic_block (*redirect_edge_and_branch_force) (edge, basic_block);
 
+  /* Returns true if it is possible to remove the edge by redirecting it
+     to the destination of the other edge going from its source.  */
+  bool (*can_remove_branch_p) (edge);
+
   /* Remove statements corresponding to a given basic block.  */
   void (*delete_basic_block) (basic_block);
 
@@ -108,12 +112,38 @@ struct cfg_hooks
   /* This function is called immediately before edge E is removed from
      the edge vector E->dest->preds.  */
   void (*execute_on_shrinking_pred) (edge);
+
+  /* A hook for duplicating loop in CFG, currently this is used
+     in loop versioning.  */
+  bool (*cfg_hook_duplicate_loop_to_header_edge) (struct loop *, edge,
+                                                 unsigned, sbitmap,
+                                                 edge, VEC (edge, heap) **,
+                                                 int);
+
+  /* Add condition to new basic block and update CFG used in loop
+     versioning.  */
+  void (*lv_add_condition_to_bb) (basic_block, basic_block, basic_block,
+                                 void *);
+  /* Update the PHI nodes in case of loop versioning.  */
+  void (*lv_adjust_loop_header_phi) (basic_block, basic_block,
+                                    basic_block, edge);
+
+  /* Given a condition BB extract the true/false taken/not taken edges
+     (depending if we are on tree's or RTL). */
+  void (*extract_cond_bb_edges) (basic_block, edge *, edge *);
+
+
+  /* Add PHI arguments queued in PENDINT_STMT list on edge E to edge
+     E->dest (only in tree-ssa loop versioning.  */
+  void (*flush_pending_stmts) (edge);
 };
 
 extern void verify_flow_info (void);
 extern void dump_bb (basic_block, FILE *, int);
 extern edge redirect_edge_and_branch (edge, basic_block);
 extern basic_block redirect_edge_and_branch_force (edge, basic_block);
+extern bool can_remove_branch_p (edge);
+extern void remove_branch (edge);
 extern edge split_block (basic_block, void *);
 extern edge split_block_after_labels (basic_block);
 extern bool move_block_after (basic_block, basic_block);
@@ -130,12 +160,25 @@ extern void tidy_fallthru_edges (void);
 extern void predict_edge (edge e, enum br_predictor predictor, int probability);
 extern bool predicted_by_p (basic_block bb, enum br_predictor predictor);
 extern bool can_duplicate_block_p (basic_block);
-extern basic_block duplicate_block (basic_block, edge);
+extern basic_block duplicate_block (basic_block, edge, basic_block);
 extern bool block_ends_with_call_p (basic_block bb);
 extern bool block_ends_with_condjump_p (basic_block bb);
 extern int flow_call_edges_add (sbitmap);
 extern void execute_on_growing_pred (edge);
 extern void execute_on_shrinking_pred (edge);
+extern bool cfg_hook_duplicate_loop_to_header_edge (struct loop *loop, edge,
+                                                   unsigned int ndupl,
+                                                   sbitmap wont_exit,
+                                                   edge orig,
+                                                   VEC (edge, heap) **to_remove,
+                                                   int flags);
+
+extern void lv_flush_pending_stmts (edge);
+extern void extract_cond_bb_edges (basic_block, edge *, edge*);
+extern void lv_adjust_loop_header_phi (basic_block, basic_block, basic_block,
+                                      edge);
+extern void lv_add_condition_to_bb (basic_block, basic_block, basic_block,
+                                   void *);
 
 /* Hooks containers.  */
 extern struct cfg_hooks tree_cfg_hooks;
@@ -143,7 +186,7 @@ extern struct cfg_hooks rtl_cfg_hooks;
 extern struct cfg_hooks cfg_layout_rtl_cfg_hooks;
 
 /* Declarations.  */
-extern int ir_type (void);
+extern enum ir_type current_ir_type (void);
 extern void rtl_register_cfg_hooks (void);
 extern void cfg_layout_rtl_register_cfg_hooks (void);
 extern void tree_register_cfg_hooks (void);