| /* |
| * 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.lir.alloc.trace; |
| |
| import static org.graalvm.compiler.lir.alloc.trace.TraceUtil.isTrivialTrace; |
| |
| import java.util.List; |
| |
| import org.graalvm.compiler.core.common.alloc.BiDirectionalTraceBuilder; |
| import org.graalvm.compiler.core.common.alloc.SingleBlockTraceBuilder; |
| import org.graalvm.compiler.core.common.alloc.Trace; |
| import org.graalvm.compiler.core.common.alloc.TraceBuilderResult; |
| import org.graalvm.compiler.core.common.alloc.TraceBuilderResult.TrivialTracePredicate; |
| import org.graalvm.compiler.core.common.alloc.TraceStatisticsPrinter; |
| import org.graalvm.compiler.core.common.alloc.UniDirectionalTraceBuilder; |
| import org.graalvm.compiler.core.common.cfg.AbstractBlockBase; |
| import org.graalvm.compiler.debug.Debug; |
| import org.graalvm.compiler.debug.GraalError; |
| import org.graalvm.compiler.lir.LIR; |
| import org.graalvm.compiler.lir.gen.LIRGenerationResult; |
| import org.graalvm.compiler.lir.phases.AllocationPhase; |
| import org.graalvm.compiler.options.EnumOptionValue; |
| import org.graalvm.compiler.options.Option; |
| import org.graalvm.compiler.options.OptionType; |
| import org.graalvm.compiler.options.OptionValue; |
| |
| import jdk.vm.ci.code.TargetDescription; |
| |
| public class TraceBuilderPhase extends AllocationPhase { |
| |
| public enum TraceBuilder { |
| UniDirectional, |
| BiDirectional, |
| SingleBlock |
| } |
| |
| public static class Options { |
| // @formatter:off |
| @Option(help = "Trace building algorithm.", type = OptionType.Debug) |
| public static final EnumOptionValue<TraceBuilder> TraceBuilding = new EnumOptionValue<>(TraceBuilder.UniDirectional); |
| @Option(help = "Schedule trivial traces as early as possible.", type = OptionType.Debug) |
| public static final OptionValue<Boolean> TraceRAScheduleTrivialTracesEarly = new OptionValue<>(true); |
| // @formatter:on |
| } |
| |
| private static final int TRACE_LOG_LEVEL = 1; |
| public static final int TRACE_DUMP_LEVEL = 3; |
| |
| @Override |
| protected void run(TargetDescription target, LIRGenerationResult lirGenRes, AllocationContext context) { |
| AbstractBlockBase<?>[] linearScanOrder = lirGenRes.getLIR().linearScanOrder(); |
| AbstractBlockBase<?> startBlock = linearScanOrder[0]; |
| LIR lir = lirGenRes.getLIR(); |
| assert startBlock.equals(lir.getControlFlowGraph().getStartBlock()); |
| |
| final TraceBuilderResult traceBuilderResult = getTraceBuilderResult(lir, startBlock, linearScanOrder); |
| |
| if (Debug.isLogEnabled(TRACE_LOG_LEVEL)) { |
| List<Trace> traces = traceBuilderResult.getTraces(); |
| for (int i = 0; i < traces.size(); i++) { |
| Trace trace = traces.get(i); |
| Debug.log(TRACE_LOG_LEVEL, "Trace %5d: %s%s", i, trace, isTrivialTrace(lirGenRes.getLIR(), trace) ? " (trivial)" : ""); |
| } |
| } |
| TraceStatisticsPrinter.printTraceStatistics(traceBuilderResult, lirGenRes.getCompilationUnitName()); |
| Debug.dump(TRACE_DUMP_LEVEL, traceBuilderResult, "After TraceBuilding"); |
| context.contextAdd(traceBuilderResult); |
| } |
| |
| private static TraceBuilderResult getTraceBuilderResult(LIR lir, AbstractBlockBase<?> startBlock, AbstractBlockBase<?>[] linearScanOrder) { |
| TraceBuilderResult.TrivialTracePredicate pred = getTrivialTracePredicate(lir); |
| |
| TraceBuilder selectedTraceBuilder = Options.TraceBuilding.getValue(); |
| Debug.log(TRACE_LOG_LEVEL, "Building Traces using %s", selectedTraceBuilder); |
| switch (Options.TraceBuilding.getValue()) { |
| case SingleBlock: |
| return SingleBlockTraceBuilder.computeTraces(startBlock, linearScanOrder, pred); |
| case BiDirectional: |
| return BiDirectionalTraceBuilder.computeTraces(startBlock, linearScanOrder, pred); |
| case UniDirectional: |
| return UniDirectionalTraceBuilder.computeTraces(startBlock, linearScanOrder, pred); |
| } |
| throw GraalError.shouldNotReachHere("Unknown trace building algorithm: " + Options.TraceBuilding.getValue()); |
| } |
| |
| public static TraceBuilderResult.TrivialTracePredicate getTrivialTracePredicate(LIR lir) { |
| if (!Options.TraceRAScheduleTrivialTracesEarly.getValue()) { |
| return null; |
| } |
| return new TrivialTracePredicate() { |
| @Override |
| public boolean isTrivialTrace(Trace trace) { |
| return TraceUtil.isTrivialTrace(lir, trace); |
| } |
| }; |
| } |
| } |