--- a/graal/GraalCompiler/src/com/sun/c1x/C1XCompiler.java	Wed Apr 27 16:43:31 2011 +0200
+++ b/graal/GraalCompiler/src/com/sun/c1x/C1XCompiler.java	Wed Apr 27 16:48:23 2011 +0200
@@ -58,11 +58,6 @@
     public final RiXirGenerator xir;
 
     /**
-     * The ordered set of compiler extensions.
-     */
-    public List<C1XCompilerExtension> extensions;
-
-    /**
      * The backend that this compiler has been configured for.
      */
     public final Backend backend;

--- a/graal/GraalCompiler/src/com/sun/c1x/C1XCompilerExtension.java	Wed Apr 27 16:43:31 2011 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,42 +0,0 @@
-/*
- * Copyright (c) 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;
-
-import com.sun.c1x.graph.*;
-
-/**
- * Mechanism for extending C1X with extra transformations, analysis, optimizations.
- *
- * TODO: add support for fine grain specification of where/when extensions are to be called
- *
- * @author Doug Simon
- */
-public class C1XCompilerExtension {
-
-    public final void run(IR ir) {
-        process(ir);
-    }
-
-    protected void process(IR ir) {
-    }
-}

--- a/graal/GraalCompiler/src/com/sun/c1x/graph/IR.java	Wed Apr 27 16:43:31 2011 +0200
+++ b/graal/GraalCompiler/src/com/sun/c1x/graph/IR.java	Wed Apr 27 16:48:23 2011 +0200
@@ -132,12 +132,6 @@
             new BlockMerger(this);
             verifyAndPrint("After block merging");
         }
-
-        if (compilation.compiler.extensions != null) {
-            for (C1XCompilerExtension ext : compilation.compiler.extensions) {
-                ext.run(this);
-            }
-        }
     }
 
     private void computeLinearScanOrder() {