X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbepeephole.h;h=def4b8ed19dae9f791d1ed3adb8802f624d8262b;hb=d300330b1e6df8c8914b8fb70cf38ee1c8ca2634;hp=1aeb42255cebee51ba0422aa49008423f3e74051;hpb=283378402a837cb49302e69d479c67b49ed85b5e;p=libfirm

diff --git a/ir/be/bepeephole.h b/ir/be/bepeephole.h
index 1aeb42255..def4b8ed1 100644
--- a/ir/be/bepeephole.h
+++ b/ir/be/bepeephole.h
@@ -1,16 +1,76 @@
+/*
+ * Copyright (C) 1995-2008 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.
+ */
+
+/**
+ * @file
+ * @brief       peephole optimisation framework
+ * @author      Matthias Braun
+ * @version     $Id$
+ */
+
 #ifndef BEPEEPHOLE_H
 #define BEPEEPHOLE_H
 
 #include "beirg.h"
+#include "bearch_t.h"
 
 extern ir_node ***register_values;
 
-static inline ir_node *get_value_in_reg(unsigned regclass_idx,
-                                        unsigned register_idx)
+static INLINE ir_node *be_peephole_get_value(unsigned regclass_idx,
+                                             unsigned register_idx)
 {
 	return register_values[regclass_idx][register_idx];
 }
 
+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);
+}
+
+/**
+ * Datatype of the generic op handler for optimisation.
+ */
+typedef void (*peephole_opt_func) (ir_node *node);
+
+/**
+ * must be called from peephole optimisations before a node is exchanged,
+ * so bepeephole can update it's internal state.
+ */
+void be_peephole_before_exchange(const ir_node *old_node, ir_node *new_node);
+
+/**
+ * must be called from peephole optimisations after a node is exchanged,
+ * so bepeephole can update it's internal state.
+ */
+void be_peephole_after_exchange(ir_node *new_node);
+
+/**
+ * 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
+ * register-liveness information.
+ */
 void be_peephole_opt(be_irg_t *birg);
 
 #endif