19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.hotspot.replacements;
  24 
  25 import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG;
  26 import static org.graalvm.compiler.hotspot.meta.HotSpotForeignCallsProviderImpl.IDENTITY_HASHCODE;
  27 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.biasedLockMaskInPlace;
  28 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.identityHashCode;
  29 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.identityHashCodeShift;
  30 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.loadWordFromObject;
  31 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.markOffset;
  32 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.uninitializedIdentityHashCodeValue;
  33 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.unlockedMask;
  34 import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.FAST_PATH_PROBABILITY;
  35 import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.NOT_FREQUENT_PROBABILITY;
  36 import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.probability;
  37 
  38 import org.graalvm.compiler.api.replacements.Snippet;

  39 import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
  40 import org.graalvm.compiler.nodes.StructuredGraph;
  41 import org.graalvm.compiler.nodes.spi.LoweringTool;
  42 import org.graalvm.compiler.options.OptionValues;
  43 import org.graalvm.compiler.replacements.SnippetTemplate;
  44 import org.graalvm.compiler.replacements.SnippetTemplate.AbstractTemplates;
  45 import org.graalvm.compiler.replacements.SnippetTemplate.Arguments;
  46 import org.graalvm.compiler.replacements.SnippetTemplate.SnippetInfo;
  47 import org.graalvm.compiler.replacements.Snippets;
  48 import org.graalvm.compiler.word.Word;
  49 import org.graalvm.word.WordFactory;
  50 
  51 import jdk.vm.ci.code.TargetDescription;
  52 
  53 public class HashCodeSnippets implements Snippets {
  54 
  55     @Snippet
  56     public static int identityHashCodeSnippet(final Object thisObj) {
  57         if (probability(NOT_FREQUENT_PROBABILITY, thisObj == null)) {
  58             return 0;

  61     }
  62 
  63     static int computeHashCode(final Object x) {
  64         Word mark = loadWordFromObject(x, markOffset(INJECTED_VMCONFIG));
  65 
  66         // this code is independent from biased locking (although it does not look that way)
  67         final Word biasedLock = mark.and(biasedLockMaskInPlace(INJECTED_VMCONFIG));
  68         if (probability(FAST_PATH_PROBABILITY, biasedLock.equal(WordFactory.unsigned(unlockedMask(INJECTED_VMCONFIG))))) {
  69             int hash = (int) mark.unsignedShiftRight(identityHashCodeShift(INJECTED_VMCONFIG)).rawValue();
  70             if (probability(FAST_PATH_PROBABILITY, hash != uninitializedIdentityHashCodeValue(INJECTED_VMCONFIG))) {
  71                 return hash;
  72             }
  73         }
  74         return identityHashCode(IDENTITY_HASHCODE, x);
  75     }
  76 
  77     public static class Templates extends AbstractTemplates {
  78 
  79         private final SnippetInfo identityHashCodeSnippet = snippet(HashCodeSnippets.class, "identityHashCodeSnippet", HotSpotReplacementsUtil.MARK_WORD_LOCATION);
  80 
  81         public Templates(OptionValues options, HotSpotProviders providers, TargetDescription target) {
  82             super(options, providers, providers.getSnippetReflection(), target);
  83         }
  84 
  85         public void lower(IdentityHashCodeNode node, LoweringTool tool) {
  86             StructuredGraph graph = node.graph();
  87             Arguments args = new Arguments(identityHashCodeSnippet, graph.getGuardsStage(), tool.getLoweringStage());
  88             args.add("thisObj", node.object);
  89             SnippetTemplate template = template(args);
  90             template.instantiate(providers.getMetaAccess(), node, SnippetTemplate.DEFAULT_REPLACER, args);
  91         }
  92 
  93     }
  94 
  95 }

  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.hotspot.replacements;
  24 
  25 import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG;
  26 import static org.graalvm.compiler.hotspot.meta.HotSpotForeignCallsProviderImpl.IDENTITY_HASHCODE;
  27 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.biasedLockMaskInPlace;
  28 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.identityHashCode;
  29 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.identityHashCodeShift;
  30 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.loadWordFromObject;
  31 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.markOffset;
  32 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.uninitializedIdentityHashCodeValue;
  33 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.unlockedMask;
  34 import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.FAST_PATH_PROBABILITY;
  35 import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.NOT_FREQUENT_PROBABILITY;
  36 import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.probability;
  37 
  38 import org.graalvm.compiler.api.replacements.Snippet;
  39 import org.graalvm.compiler.debug.DebugHandlersFactory;
  40 import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
  41 import org.graalvm.compiler.nodes.StructuredGraph;
  42 import org.graalvm.compiler.nodes.spi.LoweringTool;
  43 import org.graalvm.compiler.options.OptionValues;
  44 import org.graalvm.compiler.replacements.SnippetTemplate;
  45 import org.graalvm.compiler.replacements.SnippetTemplate.AbstractTemplates;
  46 import org.graalvm.compiler.replacements.SnippetTemplate.Arguments;
  47 import org.graalvm.compiler.replacements.SnippetTemplate.SnippetInfo;
  48 import org.graalvm.compiler.replacements.Snippets;
  49 import org.graalvm.compiler.word.Word;
  50 import org.graalvm.word.WordFactory;
  51 
  52 import jdk.vm.ci.code.TargetDescription;
  53 
  54 public class HashCodeSnippets implements Snippets {
  55 
  56     @Snippet
  57     public static int identityHashCodeSnippet(final Object thisObj) {
  58         if (probability(NOT_FREQUENT_PROBABILITY, thisObj == null)) {
  59             return 0;

  62     }
  63 
  64     static int computeHashCode(final Object x) {
  65         Word mark = loadWordFromObject(x, markOffset(INJECTED_VMCONFIG));
  66 
  67         // this code is independent from biased locking (although it does not look that way)
  68         final Word biasedLock = mark.and(biasedLockMaskInPlace(INJECTED_VMCONFIG));
  69         if (probability(FAST_PATH_PROBABILITY, biasedLock.equal(WordFactory.unsigned(unlockedMask(INJECTED_VMCONFIG))))) {
  70             int hash = (int) mark.unsignedShiftRight(identityHashCodeShift(INJECTED_VMCONFIG)).rawValue();
  71             if (probability(FAST_PATH_PROBABILITY, hash != uninitializedIdentityHashCodeValue(INJECTED_VMCONFIG))) {
  72                 return hash;
  73             }
  74         }
  75         return identityHashCode(IDENTITY_HASHCODE, x);
  76     }
  77 
  78     public static class Templates extends AbstractTemplates {
  79 
  80         private final SnippetInfo identityHashCodeSnippet = snippet(HashCodeSnippets.class, "identityHashCodeSnippet", HotSpotReplacementsUtil.MARK_WORD_LOCATION);
  81 
  82         public Templates(OptionValues options, Iterable<DebugHandlersFactory> factories, HotSpotProviders providers, TargetDescription target) {
  83             super(options, factories, providers, providers.getSnippetReflection(), target);
  84         }
  85 
  86         public void lower(IdentityHashCodeNode node, LoweringTool tool) {
  87             StructuredGraph graph = node.graph();
  88             Arguments args = new Arguments(identityHashCodeSnippet, graph.getGuardsStage(), tool.getLoweringStage());
  89             args.add("thisObj", node.object);
  90             SnippetTemplate template = template(node.getDebug(), args);
  91             template.instantiate(providers.getMetaAccess(), node, SnippetTemplate.DEFAULT_REPLACER, args);
  92         }
  93 
  94     }
  95 
  96 }