X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fopt%2Fstrength_red.h;h=f4c33fa7372b85cecb3d9ba92542b08abfa0e25f;hb=ff0e8d7fcb34481652f0bf521ba04b1eca5e2106;hp=eab6f2fe78f8fb7ffefc038965aba0ae611753bf;hpb=d957d95d2acb2d73015af7458949938161a6dd8f;p=libfirm

diff --git a/ir/opt/strength_red.h b/ir/opt/strength_red.h
index eab6f2fe7..f4c33fa73 100644
--- a/ir/opt/strength_red.h
+++ b/ir/opt/strength_red.h
@@ -7,9 +7,9 @@
  * Purpose:     Strength reduction.
  * Author:      Beyhan Veliev
  * Modified by:
- * Created:     22.8.2003
+ * Created:     22.8.2004
  * CVS-ID:      $Id$
- * Copyright:   (c) 2003 Universität Karlsruhe
+ * Copyright:   (c) 2004 Universität Karlsruhe
  * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE.
  *
  *
@@ -21,11 +21,40 @@
 # ifndef _STRENGTH_RED_H_
 # define _STRENGTH_RED_H_
 
-# include "irgraph.h"
+#include "irnode.h"
+#include "irgraph.h"
+#include "irloop.h"
 
 /** Performs strength reduction for the passed graph. */
 void reduce_strength(ir_graph *irg);
 
+/* The information needed for an induction variable */
+# ifndef _STRENGTH_RED_TYP_
+# define _STRENGTH_RED_TYP_
+typedef struct _induct_var_info {
+  ir_op   *operation_code;  /**< The opcode of "op" */
+  ir_node *increment;       /**< The value which increase or decrease the iteration variable. */
+  ir_node *init;            /**< The start value of the iteration variable. */
+  ir_node *op;              /**< The operation which increase or decrease the iteration variable. */
+  ir_node *itervar_phi;     /**< The iteration variable. */
+  ir_node *new_phi;         /**< The new iteration variable. */
+  ir_node *new_increment;   /**< The new increment which replace the old one. */
+  ir_node *new_init;        /**< The new init value of the iteration variable. */
+  ir_node *new_op;          /**< The new operation that we need after replace. */
+  ir_node *new_cmp;         /**< The new Cmp which replaces the old one. */
+  ir_node *cmp;             /**< The Cmp which breaks the loop and compares the iteration variable with a constant. */
+  ir_node *cmp_const;       /**< The other operand of Cmp. */
+  ir_node *cmp_init_block;  /**< The initial block of the Cmp. */
+  ir_node *reducible_node;  /**< The reducible nodes are save here. */
+  int     is_reducible;     /**< To save information if anything is reducible. */
+  int     phi_pred;         /**< To save the value of iteration variable predecessors. */
+  int     init_pred_pos;    /**< To save the position of iteration variable start value. */
+  int     op_pred_pos;      /**< To save the backedge of iteration variable. */
+  ir_loop *l_itervar_phi;   /**< The loop of the induction variable */
+} induct_var_info;
+#endif
 
+/** If an ir_node is an induction variable return info else return NULL. */
+induct_var_info *is_induction_variable(induct_var_info *info);
 
 #endif /* _STRENGTH_RED_H_ */