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 * Copyright (c) 2016, 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
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package com.oracle.graal.lir.alloc.trace;

import java.util.List;

import com.oracle.graal.compiler.common.alloc.UniDirectionalTraceBuilder;
import com.oracle.graal.compiler.common.alloc.BiDirectionalTraceBuilder;
import com.oracle.graal.compiler.common.alloc.TraceBuilderResult;
import com.oracle.graal.compiler.common.cfg.AbstractBlockBase;
import com.oracle.graal.lir.LIR;
import com.oracle.graal.lir.gen.LIRGenerationResult;
import com.oracle.graal.lir.phases.LIRPhase;
import com.oracle.graal.options.Option;
import com.oracle.graal.options.OptionType;
import com.oracle.graal.options.OptionValue;

import jdk.vm.ci.code.TargetDescription;

public class TraceBuilderPhase extends LIRPhase<TraceBuilderPhase.TraceBuilderContext> {

    public static class Options {
        // @formatter:off
        @Option(help = "", type = OptionType.Debug)
        public static final OptionValue<Boolean> TraceRAbiDirectionalTraceBuilder = new OptionValue<>(false);
        // @formatter:on
    }

    public static final class TraceBuilderContext {
        public TraceBuilderResult<?> traceBuilderResult;

    }

    @Override
    protected <B extends AbstractBlockBase<B>> void run(TargetDescription target, LIRGenerationResult lirGenRes, List<B> codeEmittingOrder, List<B> linearScanOrder, TraceBuilderContext context) {
        B startBlock = linearScanOrder.get(0);
        LIR lir = lirGenRes.getLIR();
        assert startBlock.equals(lir.getControlFlowGraph().getStartBlock());
        if (Options.TraceRAbiDirectionalTraceBuilder.getValue()) {
            context.traceBuilderResult = BiDirectionalTraceBuilder.computeTraces(startBlock, linearScanOrder);
        } else {
            context.traceBuilderResult = UniDirectionalTraceBuilder.computeTraces(startBlock, linearScanOrder);
        }

    }

}