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 * Copyright (c) 2015, 2018, 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.
 *
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package org.graalvm.compiler.lir.debug;

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

import jdk.vm.ci.meta.Value;

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

    
Gets an object that represents the source of an LIR operand in a higher representation. /**
     * 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(DebugContext debug) {
        if (debug.areScopesEnabled()) {
            LIRGenerationDebugContext lirGen = debug.contextLookup(LIRGenerationDebugContext.class);
            assert lirGen != null;
            return lirGen;
        }
        return null;
    }

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

}