hotspot/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/debug/LIRGenerationDebugContext.java

/*
 * 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.debug;

import org.graalvm.compiler.debug.Debug;
import org.graalvm.compiler.lir.LIR;

import jdk.vm.ci.meta.Value;

/**
 * Provides information about {@link LIR} generation for debugging purposes.
 */
public interface LIRGenerationDebugContext {

    /**
     * Gets an object that represents the source of an {@link LIR} {@link Value operand} in a higher
     * representation.
     */
    Object getSourceForOperand(Value value);

    static LIRGenerationDebugContext getFromDebugContext() {
        if (Debug.isEnabled()) {
            LIRGenerationDebugContext lirGen = Debug.contextLookup(LIRGenerationDebugContext.class);
            assert lirGen != null;
            return lirGen;
        }
        return null;
    }

    static Object getSourceForOperandFromDebugContext(Value value) {
        LIRGenerationDebugContext gen = getFromDebugContext();
        if (gen != null) {
            return gen.getSourceForOperand(value);
        }
        return null;
    }

}