--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/phases/LowLevelLowTierPhase.java	Fri Feb 06 16:57:37 2015 +0100
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2015, 2015, 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.oracle.graal.lir.phases;
+
+import com.oracle.graal.api.code.*;
+import com.oracle.graal.lir.gen.*;
+
+public abstract class LowLevelLowTierPhase extends LowLevelPhase<LowLevelLowTierPhase.Context> {
+
+    public static final class Context {
+    }
+
+    @Override
+    protected void run(TargetDescription target, LIRGenerationResult lirGenRes, Context context) {
+        run(target, lirGenRes);
+    }
+
+    protected abstract void run(TargetDescription target, LIRGenerationResult lirGenRes);
+
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/phases/LowLevelPhase.java	Fri Feb 06 16:57:37 2015 +0100
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2015, 2015, 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.oracle.graal.lir.phases;
+
+import com.oracle.graal.api.code.*;
+import com.oracle.graal.debug.*;
+import com.oracle.graal.debug.Debug.Scope;
+import com.oracle.graal.debug.DebugMemUseTracker.Closeable;
+import com.oracle.graal.debug.internal.*;
+import com.oracle.graal.lir.*;
+import com.oracle.graal.lir.gen.*;
+
+/**
+ * Base class for all {@link LIR low-level} phases. Subclasses should be stateless. There will be
+ * one global instance for each phase that is shared for all compilations.
+ */
+public abstract class LowLevelPhase<C> {
+
+    /**
+     * Records time spent within {@link #apply}.
+     */
+    private final DebugTimer timer;
+
+    /**
+     * Records memory usage within {@link #apply}.
+     */
+    private final DebugMemUseTracker memUseTracker;
+
+    public LowLevelPhase() {
+        timer = Debug.timer("LowLevelPhaseTime_%s", getClass());
+        memUseTracker = Debug.memUseTracker("LowLevelPhaseMemUse_%s", getClass());
+    }
+
+    public void apply(TargetDescription target, LIRGenerationResult lirGenRes, C context) {
+        try (TimerCloseable a = timer.start(); Scope s = Debug.scope(getClass(), this); Closeable c = memUseTracker.start()) {
+            run(target, lirGenRes, context);
+        } catch (Throwable e) {
+            throw Debug.handle(e);
+        }
+    }
+
+    protected abstract void run(TargetDescription target, LIRGenerationResult lirGenRes, C context);
+}