Mercurial > hg > graal-jvmci-8
diff jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotJVMCICompilerConfig.java @ 23723:3db9e47b477a
simplified JVMCI compiler auto selection (JDK-8160730)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Sun, 03 Jul 2016 00:13:22 +0200 |
parents | c61554b3f6df |
children | 5595ab8ba8bd |
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--- a/jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotJVMCICompilerConfig.java Sat Jul 02 01:00:54 2016 +0200 +++ b/jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotJVMCICompilerConfig.java Sun Jul 03 00:13:22 2016 +0200 @@ -22,10 +22,6 @@ */ package jdk.vm.ci.hotspot; -import java.util.ArrayList; -import java.util.Collections; -import java.util.Comparator; - import jdk.vm.ci.code.CompilationRequest; import jdk.vm.ci.code.CompilationRequestResult; import jdk.vm.ci.common.JVMCIError; @@ -33,7 +29,6 @@ import jdk.vm.ci.runtime.JVMCICompiler; import jdk.vm.ci.runtime.JVMCIRuntime; import jdk.vm.ci.runtime.services.JVMCICompilerFactory; -import jdk.vm.ci.runtime.services.JVMCICompilerFactory.AutoSelectionPrecedence; import jdk.vm.ci.services.Services; final class HotSpotJVMCICompilerConfig { @@ -61,54 +56,6 @@ private static JVMCICompilerFactory compilerFactory; /** - * Comparator that sorts available {@link JVMCICompilerFactory} objects according to their - * {@link JVMCICompilerFactory#getAutoSelectionRelationTo(JVMCICompilerFactory) relative} - * auto-selection preferences. Factories with higher preferences are sorted earlier. If a - */ - static class FactoryComparator implements Comparator<JVMCICompilerFactory> { - - /** - * Compares two compiler factories and returns -1 if {@code o1} should be auto-selected over - * {@code o2}, -1 if {@code o1} should be auto-selected over {@code o2} or 0 if - * {@code o1 == o2 || o1.getClass() == o2.getClass()}. - * - * @throws JVMCIError there is no auto-selection preference relation between {@code o1} and - * {@code o2} - */ - public int compare(JVMCICompilerFactory o1, JVMCICompilerFactory o2) { - if (o1 == o2 || o1.getClass() == o2.getClass()) { - return 0; - } - AutoSelectionPrecedence o1Precedence = o1.getAutoSelectionRelationTo(o2); - AutoSelectionPrecedence o2Precedence = o2.getAutoSelectionRelationTo(o1); - switch (o1Precedence) { - case HIGHER: { - assert o2Precedence != o1Precedence : "auto selection precedence of " + o1 + " and " + o2 + " cannot both be " + o1Precedence; - return -1; - } - case LOWER: { - assert o2Precedence != o1Precedence : "auto selection precedence of " + o1 + " and " + o2 + " cannot both be " + o1Precedence; - return 1; - } - case UNRELATED: { - switch (o2Precedence) { - case HIGHER: { - return 1; - } - case LOWER: { - return -1; - } - default: - break; - } - } - } - // No auto-selection preference relation between o1 and o2 - throw new JVMCIError("JVMCI compiler must be specified with the '%s' system property", Option.JVMCI_OPTION_PROPERTY_PREFIX + Option.Compiler); - } - } - - /** * Gets the selected system compiler factory. * * @return the selected system compiler factory @@ -127,24 +74,21 @@ throw new JVMCIError("JVMCI compiler '%s' not found", compilerName); } } else { - // Auto selection - ArrayList<JVMCICompilerFactory> factories = new ArrayList<>(); + // Auto select a single available compiler for (JVMCICompilerFactory f : Services.load(JVMCICompilerFactory.class)) { - factories.add(f); + if (factory == null) { + factory = f; + } else { + // Multiple factories seen - cancel auto selection + factory = null; + break; + } } - if (!factories.isEmpty()) { - if (factories.size() == 1) { - factory = factories.get(0); - } else { - Collections.sort(factories, new FactoryComparator()); - factory = factories.get(0); - } - } else { + if (factory == null) { factory = new DummyCompilerFactory(); } - factory.onSelection(); } - assert factory != null; + factory.onSelection(); compilerFactory = factory; } return compilerFactory;