X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbepeephole.h;h=26a53c33730e32cc6935f5ce8159801e64b17a09;hb=493edb72be97161f5c8762e4589631a6e7083a29;hp=86fe44f129673499b425ab23d5a4f3a883f72aee;hpb=b70b1794d3fe3c289fd988aacbb567761186cd16;p=libfirm

diff --git a/ir/be/bepeephole.h b/ir/be/bepeephole.h
index 86fe44f12..26a53c337 100644
--- a/ir/be/bepeephole.h
+++ b/ir/be/bepeephole.h
@@ -1,65 +1,77 @@
 /*
- * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
- *
  * This file is part of libFirm.
- *
- * This file may be distributed and/or modified under the terms of the
- * GNU General Public License version 2 as published by the Free Software
- * Foundation and appearing in the file LICENSE.GPL included in the
- * packaging of this file.
- *
- * Licensees holding valid libFirm Professional Edition licenses may use
- * this file in accordance with the libFirm Commercial License.
- * Agreement provided with the Software.
- *
- * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
- * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE.
+ * Copyright (C) 2012 University of Karlsruhe.
  */
 
 /**
  * @file
  * @brief       peephole optimisation framework
  * @author      Matthias Braun
- * @version     $Id$
  */
-
 #ifndef BEPEEPHOLE_H
 #define BEPEEPHOLE_H
 
-#include "beirg.h"
-#include "bearch_t.h"
+#include "bearch.h"
 
-extern ir_node ***register_values;
+extern ir_node **register_values;
 
-static INLINE ir_node *be_peephole_get_value(unsigned regclass_idx,
-                                             unsigned register_idx)
+static inline ir_node *be_peephole_get_value(unsigned register_idx)
 {
-	return register_values[regclass_idx][register_idx];
+	return register_values[register_idx];
 }
 
-static INLINE ir_node *be_peephole_get_reg_value(const arch_register_t *reg)
+static inline ir_node *be_peephole_get_reg_value(const arch_register_t *reg)
 {
-	unsigned regclass_idx = arch_register_class_index(arch_register_get_class(reg));
-	unsigned register_idx = arch_register_get_index(reg);
-
-	return be_peephole_get_value(regclass_idx, register_idx);
+	unsigned register_idx = reg->global_index;
+	return be_peephole_get_value(register_idx);
 }
 
 /**
- * Datatype of the generic op handler for optimisation. If it exchanged node
- * with something else, then it must return the new node, otherwise NULL.
+ * Datatype of the generic op handler for optimisation.
+ */
+typedef void (*peephole_opt_func) (ir_node *node);
+
+/**
+ * When doing peephole optimisation use this function instead of plain
+ * exchange(), so it can update its internal state.  This function also removes
+ * the old node from the schedule.
+ */
+void be_peephole_exchange(ir_node *old, ir_node *nw);
+
+/**
+ * Tries to optimize a beIncSp node with its previous IncSP node.
+ * Must be run from a be_peephole_opt() context.
+ *
+ * @param node  a be_IncSP node
+ *
+ * @return the new IncSP node or node itself
+ */
+ir_node *be_peephole_IncSP_IncSP(ir_node *node);
+
+bool be_has_only_one_user(ir_node *node);
+
+/**
+ * In a scheduled program with registers assigned,
+ * checks whether @p node can be moved before @p before without changing program
+ * semantics.
+ *
+ * Note: It is allowed to use this function without being in a peephole
+ * optimization phase.
  */
-typedef ir_node*(*peephole_opt_func) (ir_node *node);
+bool be_can_move_down(ir_heights_t *heights, const ir_node *node,
+                      const ir_node *before);
+
+bool be_can_move_up(ir_heights_t *heights, const ir_node *node,
+                    const ir_node *after);
 
 /**
  * Do peephole optimisations. It traverses the schedule of all blocks in
  * backward direction. The register_values variable indicates which (live)
  * values are stored in which register.
  * The generic op handler is called for each node if it exists. That's where
- * backedn specific optimisations should be performed based on the
+ * backend specific optimisations should be performed based on the
  * register-liveness information.
  */
-void be_peephole_opt(be_irg_t *birg);
+void be_peephole_opt(ir_graph *irg);
 
 #endif