--- a/graal/GraalCompiler/src/com/sun/c1x/opt/InstructionSubstituter.java	Wed Apr 27 16:59:28 2011 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,99 +0,0 @@
-/*
- * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-package com.sun.c1x.opt;
-
-import com.sun.c1x.ir.*;
-import com.sun.c1x.value.*;
-import com.sun.c1x.graph.IR;
-
-/**
- * This class allows instructions to be substituted within an IR graph. It allows
- * registering substitutions and iterates over the instructions of a program and replaces
- * the occurrence of each instruction with its substitution, if it has one.
- *
- * @author Ben L. Titzer
- */
-public final class InstructionSubstituter implements BlockClosure, ValueClosure {
-
-    final IR ir;
-    boolean hasSubstitution;
-
-    public InstructionSubstituter(IR ir) {
-        this.ir = ir;
-    }
-
-    public void apply(BlockBegin block) {
-        Instruction last = null;
-        if (block.exceptionHandlerStates() != null) {
-            for (FrameState s : block.exceptionHandlerStates()) {
-                s.valuesDo(this);
-            }
-        }
-        for (Instruction n = block; n != null; n = last.next()) {
-            n.allValuesDo(this);
-            if (n.subst != null && last != null) {
-                // this instruction has a substitution, skip it
-                last.resetNext(n.next());
-            } else {
-                last = n;
-            }
-        }
-    }
-
-    public void finish() {
-        if (hasSubstitution) {
-            ir.startBlock.iterateAnyOrder(this, false);
-        }
-    }
-
-    public boolean hasSubst(Value i) {
-        return i.subst != null;
-    }
-
-    public void setSubst(Value i, Value n) {
-        if (i == n) {
-            i.subst = null;
-        } else {
-            hasSubstitution = true;
-            i.subst = n;
-        }
-    }
-
-    public Value getSubst(Value i) {
-        Value p = i;
-        while (true) {
-            if (p.subst == null) {
-                break;
-            }
-            p = p.subst;
-        }
-        return p;
-    }
-
-    public Value apply(Value i) {
-        if (i != null) {
-            return getSubst(i);
-        }
-        return i;
-    }
-}