Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/DefaultHotSpotLoweringProvider.java @ 21528:513f8d0ae27d
merge fixes
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Fri, 22 May 2015 23:58:35 +0200 |
parents | 1da7aef31a08 |
children | 93c50cefb9e8 |
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/* * Copyright (c) 2011, 2015, 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 com.oracle.graal.hotspot.meta; import static com.oracle.graal.api.meta.LocationIdentity.*; import static com.oracle.graal.compiler.common.GraalOptions.*; import static com.oracle.graal.hotspot.meta.HotSpotForeignCallsProviderImpl.*; import static com.oracle.graal.hotspot.replacements.HotSpotReplacementsUtil.*; import static com.oracle.graal.hotspot.replacements.NewObjectSnippets.*; import java.lang.ref.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.hotspot.*; import com.oracle.graal.hotspot.jvmci.*; import com.oracle.graal.hotspot.nodes.*; import com.oracle.graal.hotspot.nodes.type.*; import com.oracle.graal.hotspot.replacements.*; import com.oracle.graal.hotspot.replacements.arraycopy.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.debug.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.java.*; import com.oracle.graal.nodes.memory.*; import com.oracle.graal.nodes.memory.HeapAccess.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; import com.oracle.graal.replacements.*; import com.oracle.graal.replacements.nodes.*; /** * HotSpot implementation of {@link LoweringProvider}. */ public class DefaultHotSpotLoweringProvider extends DefaultJavaLoweringProvider implements HotSpotLoweringProvider { protected final HotSpotGraalRuntimeProvider runtime; protected final ForeignCallsProvider foreignCalls; protected final HotSpotRegistersProvider registers; protected CheckCastDynamicSnippets.Templates checkcastDynamicSnippets; protected InstanceOfSnippets.Templates instanceofSnippets; protected NewObjectSnippets.Templates newObjectSnippets; protected MonitorSnippets.Templates monitorSnippets; protected WriteBarrierSnippets.Templates writeBarrierSnippets; protected LoadExceptionObjectSnippets.Templates exceptionObjectSnippets; protected UnsafeLoadSnippets.Templates unsafeLoadSnippets; protected AssertionSnippets.Templates assertionSnippets; protected ArrayCopySnippets.Templates arraycopySnippets; public DefaultHotSpotLoweringProvider(HotSpotGraalRuntimeProvider runtime, MetaAccessProvider metaAccess, ForeignCallsProvider foreignCalls, HotSpotRegistersProvider registers, TargetDescription target) { super(metaAccess, target); this.runtime = runtime; this.foreignCalls = foreignCalls; this.registers = registers; } public void initialize(HotSpotProviders providers, HotSpotVMConfig config) { super.initialize(providers, providers.getSnippetReflection()); assert target == providers.getCodeCache().getTarget(); checkcastDynamicSnippets = new CheckCastDynamicSnippets.Templates(providers, target); instanceofSnippets = new InstanceOfSnippets.Templates(providers, target); newObjectSnippets = new NewObjectSnippets.Templates(providers, target); monitorSnippets = new MonitorSnippets.Templates(providers, target, config.useFastLocking); writeBarrierSnippets = new WriteBarrierSnippets.Templates(providers, target, config.useCompressedOops ? config.getOopEncoding() : null); exceptionObjectSnippets = new LoadExceptionObjectSnippets.Templates(providers, target); unsafeLoadSnippets = new UnsafeLoadSnippets.Templates(providers, target); assertionSnippets = new AssertionSnippets.Templates(providers, target); arraycopySnippets = new ArrayCopySnippets.Templates(providers, target); providers.getReplacements().registerSnippetTemplateCache(new UnsafeArrayCopySnippets.Templates(providers, target)); } @Override public void lower(Node n, LoweringTool tool) { StructuredGraph graph = (StructuredGraph) n.graph(); if (n instanceof Invoke) { lowerInvoke((Invoke) n, tool, graph); } else if (n instanceof LoadMethodNode) { lowerLoadMethodNode((LoadMethodNode) n); } else if (n instanceof GetClassNode) { lowerGetClassNode((GetClassNode) n, tool, graph); } else if (n instanceof StoreHubNode) { lowerStoreHubNode((StoreHubNode) n, graph); } else if (n instanceof OSRStartNode) { lowerOSRStartNode((OSRStartNode) n); } else if (n instanceof BytecodeExceptionNode) { lowerBytecodeExceptionNode((BytecodeExceptionNode) n); } else if (n instanceof CheckCastDynamicNode) { checkcastDynamicSnippets.lower((CheckCastDynamicNode) n, tool); } else if (n instanceof InstanceOfNode) { if (graph.getGuardsStage().areDeoptsFixed()) { instanceofSnippets.lower((InstanceOfNode) n, tool); } } else if (n instanceof TypeCheckNode) { if (graph.getGuardsStage().areDeoptsFixed()) { instanceofSnippets.lower((TypeCheckNode) n, tool); } } else if (n instanceof InstanceOfDynamicNode) { if (graph.getGuardsStage().areDeoptsFixed()) { instanceofSnippets.lower((InstanceOfDynamicNode) n, tool); } } else if (n instanceof ClassIsAssignableFromNode) { if (graph.getGuardsStage().areDeoptsFixed()) { instanceofSnippets.lower((ClassIsAssignableFromNode) n, tool); } } else if (n instanceof NewInstanceNode) { if (graph.getGuardsStage().areFrameStatesAtDeopts()) { newObjectSnippets.lower((NewInstanceNode) n, registers, tool); } } else if (n instanceof DynamicNewInstanceNode) { if (graph.getGuardsStage().areFrameStatesAtDeopts()) { newObjectSnippets.lower((DynamicNewInstanceNode) n, registers, tool); } } else if (n instanceof NewArrayNode) { if (graph.getGuardsStage().areFrameStatesAtDeopts()) { newObjectSnippets.lower((NewArrayNode) n, registers, runtime, tool); } } else if (n instanceof DynamicNewArrayNode) { if (graph.getGuardsStage().areFrameStatesAtDeopts()) { newObjectSnippets.lower((DynamicNewArrayNode) n, registers, tool); } } else if (n instanceof VerifyHeapNode) { if (graph.getGuardsStage().areFrameStatesAtDeopts()) { newObjectSnippets.lower((VerifyHeapNode) n, registers, runtime, tool); } } else if (n instanceof MonitorEnterNode) { if (graph.getGuardsStage().areFrameStatesAtDeopts()) { monitorSnippets.lower((MonitorEnterNode) n, registers, tool); } } else if (n instanceof MonitorExitNode) { if (graph.getGuardsStage().areFrameStatesAtDeopts()) { monitorSnippets.lower((MonitorExitNode) n, tool); } } else if (n instanceof ArrayCopyNode) { arraycopySnippets.lower((ArrayCopyNode) n, tool); } else if (n instanceof ArrayCopySlowPathNode) { ArrayCopySlowPathNode slowpath = (ArrayCopySlowPathNode) n; // FrameState stateAfter = slowpath.stateAfter(); arraycopySnippets.lower(slowpath, tool); } else if (n instanceof G1PreWriteBarrier) { writeBarrierSnippets.lower((G1PreWriteBarrier) n, registers, tool); } else if (n instanceof G1PostWriteBarrier) { writeBarrierSnippets.lower((G1PostWriteBarrier) n, registers, tool); } else if (n instanceof G1ReferentFieldReadBarrier) { writeBarrierSnippets.lower((G1ReferentFieldReadBarrier) n, registers, tool); } else if (n instanceof SerialWriteBarrier) { writeBarrierSnippets.lower((SerialWriteBarrier) n, tool); } else if (n instanceof SerialArrayRangeWriteBarrier) { writeBarrierSnippets.lower((SerialArrayRangeWriteBarrier) n, tool); } else if (n instanceof G1ArrayRangePreWriteBarrier) { writeBarrierSnippets.lower((G1ArrayRangePreWriteBarrier) n, registers, tool); } else if (n instanceof G1ArrayRangePostWriteBarrier) { writeBarrierSnippets.lower((G1ArrayRangePostWriteBarrier) n, registers, tool); } else if (n instanceof NewMultiArrayNode) { if (graph.getGuardsStage().areFrameStatesAtDeopts()) { newObjectSnippets.lower((NewMultiArrayNode) n, tool); } } else if (n instanceof LoadExceptionObjectNode) { exceptionObjectSnippets.lower((LoadExceptionObjectNode) n, registers, tool); } else if (n instanceof AssertionNode) { assertionSnippets.lower((AssertionNode) n, tool); } else if (n instanceof IntegerDivNode || n instanceof IntegerRemNode || n instanceof UnsignedDivNode || n instanceof UnsignedRemNode) { // Nothing to do for division nodes. The HotSpot signal handler catches divisions by // zero and the MIN_VALUE / -1 cases. } else if (n instanceof AbstractDeoptimizeNode || n instanceof UnwindNode || n instanceof RemNode) { /* No lowering, we generate LIR directly for these nodes. */ } else if (n instanceof ClassGetHubNode) { lowerClassGetHubNode((ClassGetHubNode) n, tool); } else if (n instanceof HubGetClassNode) { lowerHubGetClassNode((HubGetClassNode) n, tool); } else if (n instanceof KlassLayoutHelperNode) { lowerKlassLayoutHelperNode((KlassLayoutHelperNode) n, tool); } else { super.lower(n, tool); } } private void lowerKlassLayoutHelperNode(KlassLayoutHelperNode n, LoweringTool tool) { if (tool.getLoweringStage() == LoweringTool.StandardLoweringStage.HIGH_TIER) { return; } StructuredGraph graph = n.graph(); LocationNode location = graph.unique(new ConstantLocationNode(KLASS_LAYOUT_HELPER_LOCATION, runtime.getConfig().klassLayoutHelperOffset)); assert !n.getHub().isConstant(); graph.replaceFloating(n, graph.unique(new FloatingReadNode(n.getHub(), location, null, n.stamp(), n.getGuard(), BarrierType.NONE))); } private void lowerHubGetClassNode(HubGetClassNode n, LoweringTool tool) { if (tool.getLoweringStage() == LoweringTool.StandardLoweringStage.HIGH_TIER) { return; } StructuredGraph graph = n.graph(); LocationNode location = graph.unique(new ConstantLocationNode(CLASS_MIRROR_LOCATION, runtime.getConfig().classMirrorOffset)); assert !n.getHub().isConstant(); FloatingReadNode read = graph.unique(new FloatingReadNode(n.getHub(), location, null, n.stamp(), n.getGuard(), BarrierType.NONE)); graph.replaceFloating(n, read); } private void lowerClassGetHubNode(ClassGetHubNode n, LoweringTool tool) { if (tool.getLoweringStage() == LoweringTool.StandardLoweringStage.HIGH_TIER) { return; } StructuredGraph graph = n.graph(); LocationNode location = graph.unique(new ConstantLocationNode(CLASS_KLASS_LOCATION, runtime.getConfig().klassOffset)); assert !n.getValue().isConstant(); FloatingReadNode read = graph.unique(new FloatingReadNode(n.getValue(), location, null, n.stamp(), n.getGuard(), BarrierType.NONE)); graph.replaceFloating(n, read); } private void lowerInvoke(Invoke invoke, LoweringTool tool, StructuredGraph graph) { if (invoke.callTarget() instanceof MethodCallTargetNode) { MethodCallTargetNode callTarget = (MethodCallTargetNode) invoke.callTarget(); NodeInputList<ValueNode> parameters = callTarget.arguments(); ValueNode receiver = parameters.size() <= 0 ? null : parameters.get(0); GuardingNode receiverNullCheck = null; if (!callTarget.isStatic() && receiver.stamp() instanceof ObjectStamp && !StampTool.isPointerNonNull(receiver)) { receiverNullCheck = createNullCheck(receiver, invoke.asNode(), tool); invoke.setGuard(receiverNullCheck); } JavaType[] signature = callTarget.targetMethod().getSignature().toParameterTypes(callTarget.isStatic() ? null : callTarget.targetMethod().getDeclaringClass()); LoweredCallTargetNode loweredCallTarget = null; if (InlineVTableStubs.getValue() && callTarget.invokeKind().isIndirect() && (AlwaysInlineVTableStubs.getValue() || invoke.isPolymorphic())) { HotSpotResolvedJavaMethod hsMethod = (HotSpotResolvedJavaMethod) callTarget.targetMethod(); ResolvedJavaType receiverType = invoke.getReceiverType(); if (hsMethod.isInVirtualMethodTable(receiverType)) { Kind wordKind = runtime.getTarget().wordKind; ValueNode hub = createReadHub(graph, receiver, receiverNullCheck); ReadNode metaspaceMethod = createReadVirtualMethod(graph, hub, hsMethod, receiverType); // We use LocationNode.ANY_LOCATION for the reads that access the // compiled code entry as HotSpot does not guarantee they are final // values. int methodCompiledEntryOffset = runtime.getConfig().methodCompiledEntryOffset; ReadNode compiledEntry = graph.add(new ReadNode(metaspaceMethod, graph.unique(new ConstantLocationNode(any(), methodCompiledEntryOffset)), StampFactory.forKind(wordKind), BarrierType.NONE)); loweredCallTarget = graph.add(new HotSpotIndirectCallTargetNode(metaspaceMethod, compiledEntry, parameters, invoke.asNode().stamp(), signature, callTarget.targetMethod(), CallingConvention.Type.JavaCall, callTarget.invokeKind())); graph.addBeforeFixed(invoke.asNode(), metaspaceMethod); graph.addAfterFixed(metaspaceMethod, compiledEntry); } } if (loweredCallTarget == null) { loweredCallTarget = graph.add(new HotSpotDirectCallTargetNode(parameters, invoke.asNode().stamp(), signature, callTarget.targetMethod(), CallingConvention.Type.JavaCall, callTarget.invokeKind())); } callTarget.replaceAndDelete(loweredCallTarget); } } @Override protected Stamp loadStamp(Stamp stamp, Kind kind, boolean compressible) { if (kind == Kind.Object && compressible && runtime.getConfig().useCompressedOops) { return NarrowOopStamp.compressed((ObjectStamp) stamp, runtime.getConfig().getOopEncoding()); } return super.loadStamp(stamp, kind, compressible); } @Override protected ValueNode implicitLoadConvert(StructuredGraph graph, Kind kind, ValueNode value, boolean compressible) { if (kind == Kind.Object && compressible && runtime.getConfig().useCompressedOops) { return CompressionNode.uncompress(value, runtime.getConfig().getOopEncoding()); } return super.implicitLoadConvert(graph, kind, value, compressible); } @Override protected ValueNode staticFieldBase(StructuredGraph graph, ResolvedJavaField f) { HotSpotResolvedJavaField field = (HotSpotResolvedJavaField) f; JavaConstant base = field.getDeclaringClass().getJavaClass(); return ConstantNode.forConstant(base, metaAccess, graph); } @Override protected ValueNode implicitStoreConvert(StructuredGraph graph, Kind kind, ValueNode value, boolean compressible) { if (kind == Kind.Object && compressible && runtime.getConfig().useCompressedOops) { return CompressionNode.compress(value, runtime.getConfig().getOopEncoding()); } return super.implicitStoreConvert(graph, kind, value, compressible); } @Override protected ValueNode createReadArrayComponentHub(StructuredGraph graph, ValueNode arrayHub, FixedNode anchor) { LocationNode location = graph.unique(new ConstantLocationNode(OBJ_ARRAY_KLASS_ELEMENT_KLASS_LOCATION, runtime.getConfig().arrayClassElementOffset)); /* * Anchor the read of the element klass to the cfg, because it is only valid when arrayClass * is an object class, which might not be the case in other parts of the compiled method. */ return graph.unique(new FloatingReadNode(arrayHub, location, null, KlassPointerStamp.klassNonNull(), AbstractBeginNode.prevBegin(anchor))); } @Override protected void lowerUnsafeLoadNode(UnsafeLoadNode load, LoweringTool tool) { StructuredGraph graph = load.graph(); if (load.getGuardingCondition() == null && !graph.getGuardsStage().allowsFloatingGuards() && addReadBarrier(load)) { unsafeLoadSnippets.lower(load, tool); } else { super.lowerUnsafeLoadNode(load, tool); } } private static void lowerLoadMethodNode(LoadMethodNode loadMethodNode) { StructuredGraph graph = loadMethodNode.graph(); HotSpotResolvedJavaMethod method = (HotSpotResolvedJavaMethod) loadMethodNode.getMethod(); ReadNode metaspaceMethod = createReadVirtualMethod(graph, loadMethodNode.getHub(), method, loadMethodNode.getReceiverType()); graph.replaceFixed(loadMethodNode, metaspaceMethod); } private static void lowerGetClassNode(GetClassNode getClass, LoweringTool tool, StructuredGraph graph) { StampProvider stampProvider = tool.getStampProvider(); LoadHubNode hub = graph.unique(new LoadHubNode(stampProvider, getClass.getObject())); HubGetClassNode hubGetClass = graph.unique(new HubGetClassNode(tool.getMetaAccess(), hub)); graph.replaceFloating(getClass, hubGetClass); hub.lower(tool); hubGetClass.lower(tool); } private void lowerStoreHubNode(StoreHubNode storeHub, StructuredGraph graph) { WriteNode hub = createWriteHub(graph, storeHub.getObject(), storeHub.getValue()); graph.replaceFixed(storeHub, hub); } @Override protected BarrierType fieldInitializationBarrier(Kind entryKind) { return (entryKind == Kind.Object && !runtime.getConfig().useDeferredInitBarriers) ? BarrierType.IMPRECISE : BarrierType.NONE; } @Override protected BarrierType arrayInitializationBarrier(Kind entryKind) { return (entryKind == Kind.Object && !runtime.getConfig().useDeferredInitBarriers) ? BarrierType.PRECISE : BarrierType.NONE; } private void lowerOSRStartNode(OSRStartNode osrStart) { StructuredGraph graph = osrStart.graph(); if (graph.getGuardsStage() == StructuredGraph.GuardsStage.FIXED_DEOPTS) { StartNode newStart = graph.add(new StartNode()); ParameterNode buffer = graph.unique(new ParameterNode(0, StampFactory.forKind(runtime.getTarget().wordKind))); ForeignCallNode migrationEnd = graph.add(new ForeignCallNode(foreignCalls, OSR_MIGRATION_END, buffer)); migrationEnd.setStateAfter(osrStart.stateAfter()); newStart.setNext(migrationEnd); FixedNode next = osrStart.next(); osrStart.setNext(null); migrationEnd.setNext(next); graph.setStart(newStart); // mirroring the calculations in c1_GraphBuilder.cpp (setup_osr_entry_block) int localsOffset = (graph.method().getMaxLocals() - 1) * 8; for (OSRLocalNode osrLocal : graph.getNodes(OSRLocalNode.TYPE)) { int size = osrLocal.getKind().getSlotCount(); int offset = localsOffset - (osrLocal.index() + size - 1) * 8; IndexedLocationNode location = graph.unique(new IndexedLocationNode(any(), offset, ConstantNode.forLong(0, graph), 1)); ReadNode load = graph.add(new ReadNode(buffer, location, osrLocal.stamp(), BarrierType.NONE)); osrLocal.replaceAndDelete(load); graph.addBeforeFixed(migrationEnd, load); } osrStart.replaceAtUsages(newStart); osrStart.safeDelete(); } } static final class Exceptions { protected static final ArrayIndexOutOfBoundsException cachedArrayIndexOutOfBoundsException; protected static final NullPointerException cachedNullPointerException; static { cachedArrayIndexOutOfBoundsException = new ArrayIndexOutOfBoundsException(); cachedArrayIndexOutOfBoundsException.setStackTrace(new StackTraceElement[0]); cachedNullPointerException = new NullPointerException(); cachedNullPointerException.setStackTrace(new StackTraceElement[0]); } } public static final class RuntimeCalls { public static final ForeignCallDescriptor CREATE_NULL_POINTER_EXCEPTION = new ForeignCallDescriptor("createNullPointerException", NullPointerException.class); public static final ForeignCallDescriptor CREATE_OUT_OF_BOUNDS_EXCEPTION = new ForeignCallDescriptor("createOutOfBoundsException", ArrayIndexOutOfBoundsException.class, int.class); } private void lowerBytecodeExceptionNode(BytecodeExceptionNode node) { StructuredGraph graph = node.graph(); if (graph.getGuardsStage().allowsFloatingGuards()) { if (OmitHotExceptionStacktrace.getValue()) { Throwable exception; if (node.getExceptionClass() == NullPointerException.class) { exception = Exceptions.cachedNullPointerException; } else if (node.getExceptionClass() == ArrayIndexOutOfBoundsException.class) { exception = Exceptions.cachedArrayIndexOutOfBoundsException; } else { throw GraalInternalError.shouldNotReachHere(); } FloatingNode exceptionNode = ConstantNode.forConstant(HotSpotObjectConstantImpl.forObject(exception), metaAccess, graph); graph.replaceFixedWithFloating(node, exceptionNode); } else { ForeignCallDescriptor descriptor; if (node.getExceptionClass() == NullPointerException.class) { descriptor = RuntimeCalls.CREATE_NULL_POINTER_EXCEPTION; } else if (node.getExceptionClass() == ArrayIndexOutOfBoundsException.class) { descriptor = RuntimeCalls.CREATE_OUT_OF_BOUNDS_EXCEPTION; } else { throw GraalInternalError.shouldNotReachHere(); } ForeignCallNode foreignCallNode = graph.add(new ForeignCallNode(foreignCalls, descriptor, node.stamp(), node.getArguments())); graph.replaceFixedWithFixed(node, foreignCallNode); } } } private boolean addReadBarrier(UnsafeLoadNode load) { if (runtime.getConfig().useG1GC && load.graph().getGuardsStage() == StructuredGraph.GuardsStage.FIXED_DEOPTS && load.object().getKind() == Kind.Object && load.accessKind() == Kind.Object && !StampTool.isPointerAlwaysNull(load.object())) { ResolvedJavaType type = StampTool.typeOrNull(load.object()); if (type != null && !type.isArray()) { return true; } } return false; } private static ReadNode createReadVirtualMethod(StructuredGraph graph, ValueNode hub, HotSpotResolvedJavaMethod method, ResolvedJavaType receiverType) { return createReadVirtualMethod(graph, hub, method.vtableEntryOffset(receiverType)); } private static ReadNode createReadVirtualMethod(StructuredGraph graph, ValueNode hub, int vtableEntryOffset) { assert vtableEntryOffset > 0; // We use LocationNode.ANY_LOCATION for the reads that access the vtable // entry as HotSpot does not guarantee that this is a final value. Stamp methodStamp = MethodPointerStamp.method(); ReadNode metaspaceMethod = graph.add(new ReadNode(hub, graph.unique(new ConstantLocationNode(any(), vtableEntryOffset)), methodStamp, BarrierType.NONE)); return metaspaceMethod; } @Override protected ValueNode createReadHub(StructuredGraph graph, ValueNode object, GuardingNode guard) { HotSpotVMConfig config = runtime.getConfig(); LocationNode location = graph.unique(new ConstantLocationNode(HUB_LOCATION, config.hubOffset)); assert !object.isConstant() || object.isNullConstant(); KlassPointerStamp hubStamp = KlassPointerStamp.klassNonNull(); if (config.useCompressedClassPointers) { hubStamp = hubStamp.compressed(config.getKlassEncoding()); } FloatingReadNode memoryRead = graph.unique(new FloatingReadNode(object, location, null, hubStamp, guard, BarrierType.NONE)); if (config.useCompressedClassPointers) { return CompressionNode.uncompress(memoryRead, config.getKlassEncoding()); } else { return memoryRead; } } private WriteNode createWriteHub(StructuredGraph graph, ValueNode object, ValueNode value) { HotSpotVMConfig config = runtime.getConfig(); LocationNode location = graph.unique(new ConstantLocationNode(HUB_WRITE_LOCATION, config.hubOffset)); assert !object.isConstant() || object.asConstant().isDefaultForKind(); ValueNode writeValue = value; if (config.useCompressedClassPointers) { writeValue = CompressionNode.compress(value, config.getKlassEncoding()); } return graph.add(new WriteNode(object, writeValue, location, BarrierType.NONE)); } @Override protected BarrierType fieldLoadBarrierType(ResolvedJavaField f) { HotSpotResolvedJavaField loadField = (HotSpotResolvedJavaField) f; BarrierType barrierType = BarrierType.NONE; if (runtime.getConfig().useG1GC && loadField.getKind() == Kind.Object && metaAccess.lookupJavaType(Reference.class).equals(loadField.getDeclaringClass()) && loadField.getName().equals("referent")) { barrierType = BarrierType.PRECISE; } return barrierType; } @Override protected int fieldOffset(ResolvedJavaField f) { HotSpotResolvedJavaField field = (HotSpotResolvedJavaField) f; return field.offset(); } @Override public int arrayScalingFactor(Kind kind) { if (runtime.getConfig().useCompressedOops && kind == Kind.Object) { return this.runtime.getTarget().getSizeInBytes(Kind.Int); } return super.arrayScalingFactor(kind); } @Override protected int arrayBaseOffset(Kind kind) { return runtime.getJVMCIRuntime().getArrayBaseOffset(kind); } @Override protected int arrayLengthOffset() { return runtime.getConfig().arrayLengthOffset; } @Override protected LocationIdentity initLocationIdentity() { return INIT_LOCATION; } }