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 * 2 along with this work; if not, write to the Free Software Foundation,
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package org.graalvm.compiler.hotspot;

import static jdk.vm.ci.common.InitTimer.timer;

import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

import jdk.internal.vm.compiler.collections.EconomicMap;
import org.graalvm.compiler.debug.GraalError;
import org.graalvm.compiler.debug.TTY;
import org.graalvm.compiler.lir.phases.LIRPhase;
import org.graalvm.compiler.lir.phases.LIRPhaseSuite;
import org.graalvm.compiler.options.EnumOptionKey;
import org.graalvm.compiler.options.Option;
import org.graalvm.compiler.options.OptionKey;
import org.graalvm.compiler.options.OptionType;
import org.graalvm.compiler.options.OptionValues;
import org.graalvm.compiler.phases.BasePhase;
import org.graalvm.compiler.phases.PhaseSuite;
import org.graalvm.compiler.phases.tiers.CompilerConfiguration;
import org.graalvm.compiler.serviceprovider.GraalServices;

import jdk.vm.ci.code.Architecture;
import jdk.vm.ci.common.InitTimer;

A factory that creates the CompilerConfiguration the Graal compiler will use. Each factory must have a unique name and autoSelectionPriority. The latter imposes a total ordering between factories for the purpose of auto-selecting the factory to use.
/** * A factory that creates the {@link CompilerConfiguration} the Graal compiler will use. Each * factory must have a unique {@link #name} and {@link #autoSelectionPriority}. The latter imposes a * total ordering between factories for the purpose of auto-selecting the factory to use. */
public abstract class CompilerConfigurationFactory implements Comparable<CompilerConfigurationFactory> { enum ShowConfigurationLevel { none, info, verbose } static class Options { // @formatter:off @Option(help = "Names the Graal compiler configuration to use. If ommitted, the compiler configuration " + "with the highest auto-selection priority is used. To see the set of available configurations, " + "supply the value 'help' to this option.", type = OptionType.Expert) public static final OptionKey<String> CompilerConfiguration = new OptionKey<>(null); @Option(help = "Writes to the VM log information about the Graal compiler configuration selected.", type = OptionType.User) public static final OptionKey<ShowConfigurationLevel> ShowConfiguration = new EnumOptionKey<>(ShowConfigurationLevel.none); // @formatter:on }
The name of this factory. This must be unique across all factory instances and is used when selecting a factory based on the value of Options.CompilerConfiguration.
/** * The name of this factory. This must be unique across all factory instances and is used when * selecting a factory based on the value of {@link Options#CompilerConfiguration}. */
private final String name;
The priority of this factory. This must be unique across all factory instances and is used when selecting a factory when Options.CompilerConfiguration is omitted
/** * The priority of this factory. This must be unique across all factory instances and is used * when selecting a factory when {@link Options#CompilerConfiguration} is omitted */
private final int autoSelectionPriority; protected CompilerConfigurationFactory(String name, int autoSelectionPriority) { this.name = name; this.autoSelectionPriority = autoSelectionPriority; } public abstract CompilerConfiguration createCompilerConfiguration();
Collect the set of available backends for this compiler configuration.
/** * Collect the set of available {@linkplain HotSpotBackendFactory backends} for this compiler * configuration. */
public BackendMap createBackendMap() { // default to backend with the same name as the compiler configuration return new DefaultBackendMap(name); }
Returns a name that should uniquely identify this compiler configuration.
/** * Returns a name that should uniquely identify this compiler configuration. */
public final String getName() { return name; } public interface BackendMap { HotSpotBackendFactory getBackendFactory(Architecture arch); } public static class DefaultBackendMap implements BackendMap { private final EconomicMap<Class<? extends Architecture>, HotSpotBackendFactory> backends = EconomicMap.create(); @SuppressWarnings("try") public DefaultBackendMap(String backendName) { try (InitTimer t = timer("HotSpotBackendFactory.register")) { for (HotSpotBackendFactory backend : GraalServices.load(HotSpotBackendFactory.class)) { if (backend.getName().equals(backendName)) { Class<? extends Architecture> arch = backend.getArchitecture(); HotSpotBackendFactory oldEntry = backends.put(arch, backend); assert oldEntry == null || oldEntry == backend : "duplicate Graal backend"; } } } } @Override public final HotSpotBackendFactory getBackendFactory(Architecture arch) { return backends.get(arch.getClass()); } } @Override public int compareTo(CompilerConfigurationFactory o) { if (autoSelectionPriority > o.autoSelectionPriority) { return -1; } if (autoSelectionPriority < o.autoSelectionPriority) { return 1; } assert this == o : "distinct compiler configurations cannot have the same auto selection priority"; return 0; }
Asserts uniqueness of name and autoSelectionPriority for factory in factories.
/** * Asserts uniqueness of {@link #name} and {@link #autoSelectionPriority} for {@code factory} in * {@code factories}. */
private static boolean checkUnique(CompilerConfigurationFactory factory, List<CompilerConfigurationFactory> factories) { for (CompilerConfigurationFactory other : factories) { if (other != factory) { assert !other.name.equals(factory.name) : factory.getClass().getName() + " cannot have the same selector as " + other.getClass().getName() + ": " + factory.name; assert other.autoSelectionPriority != factory.autoSelectionPriority : factory.getClass().getName() + " cannot have the same auto-selection priority as " + other.getClass().getName() + ": " + factory.autoSelectionPriority; } } return true; }
Returns:sorted list of CompilerConfigurationFactorys
/** * @return sorted list of {@link CompilerConfigurationFactory}s */
private static List<CompilerConfigurationFactory> getAllCandidates() { List<CompilerConfigurationFactory> candidates = new ArrayList<>(); for (CompilerConfigurationFactory candidate : GraalServices.load(CompilerConfigurationFactory.class)) { assert checkUnique(candidate, candidates); candidates.add(candidate); } Collections.sort(candidates); return candidates; }
Selects and instantiates a CompilerConfigurationFactory. The selection algorithm is as follows: if name is non-null, then select the factory with the same name else if Options.CompilerConfiguration.getValue() is non-null then select the factory whose name matches the value else select the factory with the highest autoSelectionPriority value.
Params:
  • name – the name of the compiler configuration to select (optional)
/** * Selects and instantiates a {@link CompilerConfigurationFactory}. The selection algorithm is * as follows: if {@code name} is non-null, then select the factory with the same name else if * {@code Options.CompilerConfiguration.getValue()} is non-null then select the factory whose * name matches the value else select the factory with the highest * {@link #autoSelectionPriority} value. * * @param name the name of the compiler configuration to select (optional) */
@SuppressWarnings("try") public static CompilerConfigurationFactory selectFactory(String name, OptionValues options) { CompilerConfigurationFactory factory = null; try (InitTimer t = timer("CompilerConfigurationFactory.selectFactory")) { String value = name == null ? Options.CompilerConfiguration.getValue(options) : name; if ("help".equals(value)) { System.out.println("The available Graal compiler configurations are:"); for (CompilerConfigurationFactory candidate : getAllCandidates()) { System.out.println(" " + candidate.name); } System.exit(0); } else if (value != null) { for (CompilerConfigurationFactory candidate : GraalServices.load(CompilerConfigurationFactory.class)) { if (candidate.name.equals(value)) { factory = candidate; break; } } if (factory == null) { throw new GraalError("Graal compiler configuration '%s' not found. Available configurations are: %s", value, getAllCandidates().stream().map(c -> c.name).collect(Collectors.joining(", "))); } } else { List<CompilerConfigurationFactory> candidates = getAllCandidates(); if (candidates.isEmpty()) { throw new GraalError("No %s providers found", CompilerConfigurationFactory.class.getName()); } factory = candidates.get(0); } } ShowConfigurationLevel level = Options.ShowConfiguration.getValue(options); if (level != ShowConfigurationLevel.none) { switch (level) { case info: { printConfigInfo(factory); break; } case verbose: { printConfigInfo(factory); CompilerConfiguration config = factory.createCompilerConfiguration(); TTY.println("High tier: " + phaseNames(config.createHighTier(options))); TTY.println("Mid tier: " + phaseNames(config.createMidTier(options))); TTY.println("Low tier: " + phaseNames(config.createLowTier(options))); TTY.println("Pre regalloc stage: " + phaseNames(config.createPreAllocationOptimizationStage(options))); TTY.println("Regalloc stage: " + phaseNames(config.createAllocationStage(options))); TTY.println("Post regalloc stage: " + phaseNames(config.createPostAllocationOptimizationStage(options))); config.createAllocationStage(options); break; } } } return factory; } private static void printConfigInfo(CompilerConfigurationFactory factory) { URL location = factory.getClass().getResource(factory.getClass().getSimpleName() + ".class"); TTY.printf("Using Graal compiler configuration '%s' provided by %s loaded from %s%n", factory.name, factory.getClass().getName(), location); } private static <C> List<String> phaseNames(PhaseSuite<C> suite) { Collection<BasePhase<? super C>> phases = suite.getPhases(); List<String> res = new ArrayList<>(phases.size()); for (BasePhase<?> phase : phases) { res.add(phase.contractorName()); } Collections.sort(res); return res; } private static <C> List<String> phaseNames(LIRPhaseSuite<C> suite) { List<LIRPhase<C>> phases = suite.getPhases(); List<String> res = new ArrayList<>(phases.size()); for (LIRPhase<?> phase : phases) { res.add(phase.getClass().getName()); } Collections.sort(res); return res; } }