--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/phases/LIRPhase.java	2017-02-15 17:05:54.593717969 -0800
@@ -0,0 +1,146 @@
+/*
+ * 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 org.graalvm.compiler.lir.phases;
+
+import java.util.regex.Pattern;
+
+import org.graalvm.compiler.debug.Debug;
+import org.graalvm.compiler.debug.Debug.Scope;
+import org.graalvm.compiler.debug.DebugCloseable;
+import org.graalvm.compiler.debug.DebugMemUseTracker;
+import org.graalvm.compiler.debug.DebugTimer;
+import org.graalvm.compiler.lir.LIR;
+import org.graalvm.compiler.lir.gen.LIRGenerationResult;
+import org.graalvm.compiler.options.Option;
+import org.graalvm.compiler.options.OptionType;
+import org.graalvm.compiler.options.OptionValue;
+
+import jdk.vm.ci.code.TargetDescription;
+
+/**
+ * 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 LIRPhase<C> {
+
+    public static class Options {
+        // @formatter:off
+        @Option(help = "Enable LIR level optimiztations.", type = OptionType.Debug)
+        public static final OptionValue<Boolean> LIROptimization = new OptionValue<>(true);
+        // @formatter:on
+    }
+
+    /**
+     * Records time spent within {@link #apply}.
+     */
+    private final DebugTimer timer;
+
+    /**
+     * Records memory usage within {@link #apply}.
+     */
+    private final DebugMemUseTracker memUseTracker;
+
+    public static final class LIRPhaseStatistics {
+        /**
+         * Records time spent within {@link #apply}.
+         */
+        public final DebugTimer timer;
+
+        /**
+         * Records memory usage within {@link #apply}.
+         */
+        public final DebugMemUseTracker memUseTracker;
+
+        private LIRPhaseStatistics(Class<?> clazz) {
+            timer = Debug.timer("LIRPhaseTime_%s", clazz);
+            memUseTracker = Debug.memUseTracker("LIRPhaseMemUse_%s", clazz);
+        }
+    }
+
+    public static final ClassValue<LIRPhaseStatistics> statisticsClassValue = new ClassValue<LIRPhaseStatistics>() {
+        @Override
+        protected LIRPhaseStatistics computeValue(Class<?> c) {
+            return new LIRPhaseStatistics(c);
+        }
+    };
+
+    /** Lazy initialization to create pattern only when assertions are enabled. */
+    static class NamePatternHolder {
+        static final Pattern NAME_PATTERN = Pattern.compile("[A-Z][A-Za-z0-9]+");
+    }
+
+    private static boolean checkName(CharSequence name) {
+        assert name == null || NamePatternHolder.NAME_PATTERN.matcher(name).matches() : "illegal phase name: " + name;
+        return true;
+    }
+
+    public LIRPhase() {
+        LIRPhaseStatistics statistics = statisticsClassValue.get(getClass());
+        timer = statistics.timer;
+        memUseTracker = statistics.memUseTracker;
+    }
+
+    public final void apply(TargetDescription target, LIRGenerationResult lirGenRes, C context) {
+        apply(target, lirGenRes, context, true);
+    }
+
+    @SuppressWarnings("try")
+    public final void apply(TargetDescription target, LIRGenerationResult lirGenRes, C context, boolean dumpLIR) {
+        try (Scope s = Debug.scope(getName(), this)) {
+            try (DebugCloseable a = timer.start(); DebugCloseable c = memUseTracker.start()) {
+                run(target, lirGenRes, context);
+                if (dumpLIR && Debug.isDumpEnabled(Debug.BASIC_LOG_LEVEL)) {
+                    Debug.dump(Debug.BASIC_LOG_LEVEL, lirGenRes.getLIR(), "%s", getName());
+                }
+            }
+        } catch (Throwable e) {
+            throw Debug.handle(e);
+        }
+    }
+
+    protected abstract void run(TargetDescription target, LIRGenerationResult lirGenRes, C context);
+
+    public static CharSequence createName(Class<?> clazz) {
+        String className = clazz.getName();
+        String s = className.substring(className.lastIndexOf(".") + 1); // strip the package name
+        int innerClassPos = s.indexOf('$');
+        if (innerClassPos > 0) {
+            /* Remove inner class name. */
+            s = s.substring(0, innerClassPos);
+        }
+        if (s.endsWith("Phase")) {
+            s = s.substring(0, s.length() - "Phase".length());
+        }
+        return s;
+    }
+
+    protected CharSequence createName() {
+        return createName(getClass());
+    }
+
+    public final CharSequence getName() {
+        CharSequence name = createName();
+        assert checkName(name);
+        return name;
+    }
+}