001/*
002 * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.lir.alloc.lsra;
024
025import java.util.*;
026
027import jdk.internal.jvmci.code.*;
028import com.oracle.graal.debug.*;
029
030import com.oracle.graal.compiler.common.alloc.*;
031import com.oracle.graal.compiler.common.cfg.*;
032import com.oracle.graal.lir.gen.*;
033import com.oracle.graal.lir.gen.LIRGeneratorTool.SpillMoveFactory;
034import com.oracle.graal.lir.phases.*;
035
036public final class LinearScanRegisterAllocationPhase extends AllocationPhase {
037
038    private final LinearScan allocator;
039
040    LinearScanRegisterAllocationPhase(LinearScan allocator) {
041        this.allocator = allocator;
042    }
043
044    @Override
045    protected <B extends AbstractBlockBase<B>> void run(TargetDescription target, LIRGenerationResult lirGenRes, List<B> codeEmittingOrder, List<B> linearScanOrder, SpillMoveFactory spillMoveFactory,
046                    RegisterAllocationConfig registerAllocationConfig) {
047        allocator.printIntervals("Before register allocation");
048        allocateRegisters();
049        allocator.printIntervals("After register allocation");
050    }
051
052    void allocateRegisters() {
053        try (Indent indent = Debug.logAndIndent("allocate registers")) {
054            Interval precoloredIntervals;
055            Interval notPrecoloredIntervals;
056
057            Interval.Pair result = allocator.createUnhandledLists(LinearScan.IS_PRECOLORED_INTERVAL, LinearScan.IS_VARIABLE_INTERVAL);
058            precoloredIntervals = result.first;
059            notPrecoloredIntervals = result.second;
060
061            // allocate cpu registers
062            LinearScanWalker lsw;
063            if (OptimizingLinearScanWalker.Options.LSRAOptimization.getValue()) {
064                lsw = new OptimizingLinearScanWalker(allocator, precoloredIntervals, notPrecoloredIntervals);
065            } else {
066                lsw = new LinearScanWalker(allocator, precoloredIntervals, notPrecoloredIntervals);
067            }
068            lsw.walk();
069            lsw.finishAllocation();
070        }
071    }
072
073}