1 /*
2 * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
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
24
25 package org.graalvm.compiler.hotspot.meta;
26
27 import static jdk.vm.ci.services.Services.IS_IN_NATIVE_IMAGE;
28 import static org.graalvm.compiler.core.common.GraalOptions.AlwaysInlineVTableStubs;
29 import static org.graalvm.compiler.core.common.GraalOptions.InlineVTableStubs;
30 import static org.graalvm.compiler.core.common.GraalOptions.OmitHotExceptionStacktrace;
31 import static org.graalvm.compiler.hotspot.meta.HotSpotForeignCallsProviderImpl.OSR_MIGRATION_END;
32 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.CLASS_KLASS_LOCATION;
33 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.CLASS_MIRROR_HANDLE_LOCATION;
34 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.CLASS_MIRROR_LOCATION;
35 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.COMPRESSED_HUB_LOCATION;
36 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.DISPLACED_MARK_WORD_LOCATION;
37 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.HUB_LOCATION;
38 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.HUB_WRITE_LOCATION;
39 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_LAYOUT_HELPER_LOCATION;
40 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.OBJ_ARRAY_KLASS_ELEMENT_KLASS_LOCATION;
41 import static jdk.internal.vm.compiler.word.LocationIdentity.any;
42
43 import java.lang.ref.Reference;
44 import java.util.EnumMap;
45
46 import org.graalvm.compiler.api.directives.GraalDirectives;
47 import org.graalvm.compiler.core.common.CompressEncoding;
48 import org.graalvm.compiler.core.common.GraalOptions;
49 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
50 import org.graalvm.compiler.core.common.spi.ForeignCallsProvider;
51 import org.graalvm.compiler.core.common.type.ObjectStamp;
52 import org.graalvm.compiler.core.common.type.Stamp;
53 import org.graalvm.compiler.core.common.type.StampFactory;
54 import org.graalvm.compiler.core.common.type.StampPair;
55 import org.graalvm.compiler.debug.DebugCloseable;
56 import org.graalvm.compiler.debug.DebugHandlersFactory;
57 import org.graalvm.compiler.debug.GraalError;
58 import org.graalvm.compiler.graph.Node;
59 import org.graalvm.compiler.graph.NodeInputList;
60 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
61 import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;
62 import org.graalvm.compiler.hotspot.gc.g1.G1ArrayRangePostWriteBarrier;
63 import org.graalvm.compiler.hotspot.gc.g1.G1ArrayRangePreWriteBarrier;
64 import org.graalvm.compiler.hotspot.gc.g1.G1PostWriteBarrier;
65 import org.graalvm.compiler.hotspot.gc.g1.G1PreWriteBarrier;
66 import org.graalvm.compiler.hotspot.gc.g1.G1ReferentFieldReadBarrier;
67 import org.graalvm.compiler.hotspot.gc.shared.SerialArrayRangeWriteBarrier;
68 import org.graalvm.compiler.hotspot.gc.shared.SerialWriteBarrier;
69 import org.graalvm.compiler.hotspot.nodes.BeginLockScopeNode;
70 import org.graalvm.compiler.hotspot.nodes.HotSpotCompressionNode;
71 import org.graalvm.compiler.hotspot.nodes.HotSpotDirectCallTargetNode;
72 import org.graalvm.compiler.hotspot.nodes.HotSpotIndirectCallTargetNode;
73 import org.graalvm.compiler.hotspot.nodes.aot.InitializeKlassNode;
74 import org.graalvm.compiler.hotspot.nodes.aot.ResolveConstantNode;
75 import org.graalvm.compiler.hotspot.nodes.aot.ResolveDynamicConstantNode;
76 import org.graalvm.compiler.hotspot.nodes.aot.ResolveMethodAndLoadCountersNode;
77 import org.graalvm.compiler.hotspot.nodes.profiling.ProfileNode;
78 import org.graalvm.compiler.hotspot.nodes.type.HotSpotNarrowOopStamp;
79 import org.graalvm.compiler.hotspot.nodes.type.KlassPointerStamp;
80 import org.graalvm.compiler.hotspot.nodes.type.MethodPointerStamp;
81 import org.graalvm.compiler.hotspot.replacements.AssertionSnippets;
82 import org.graalvm.compiler.hotspot.replacements.ClassGetHubNode;
83 import org.graalvm.compiler.hotspot.replacements.HashCodeSnippets;
84 import org.graalvm.compiler.hotspot.replacements.HubGetClassNode;
85 import org.graalvm.compiler.hotspot.replacements.IdentityHashCodeNode;
86 import org.graalvm.compiler.hotspot.replacements.InstanceOfSnippets;
87 import org.graalvm.compiler.hotspot.replacements.KlassLayoutHelperNode;
88 import org.graalvm.compiler.hotspot.replacements.LoadExceptionObjectSnippets;
89 import org.graalvm.compiler.hotspot.replacements.MonitorSnippets;
90 import org.graalvm.compiler.hotspot.replacements.NewObjectSnippets;
91 import org.graalvm.compiler.hotspot.replacements.ObjectCloneSnippets;
92 import org.graalvm.compiler.hotspot.replacements.StringToBytesSnippets;
93 import org.graalvm.compiler.hotspot.replacements.UnsafeLoadSnippets;
94 import org.graalvm.compiler.hotspot.replacements.WriteBarrierSnippets;
95 import org.graalvm.compiler.hotspot.replacements.aot.ResolveConstantSnippets;
96 import org.graalvm.compiler.hotspot.replacements.arraycopy.HotSpotArraycopySnippets;
97 import org.graalvm.compiler.hotspot.replacements.profiling.ProfileSnippets;
98 import org.graalvm.compiler.hotspot.stubs.ForeignCallSnippets;
99 import org.graalvm.compiler.hotspot.word.KlassPointer;
100 import org.graalvm.compiler.nodes.AbstractBeginNode;
101 import org.graalvm.compiler.nodes.AbstractDeoptimizeNode;
102 import org.graalvm.compiler.nodes.CompressionNode.CompressionOp;
103 import org.graalvm.compiler.nodes.ComputeObjectAddressNode;
104 import org.graalvm.compiler.nodes.ConstantNode;
105 import org.graalvm.compiler.nodes.FixedNode;
106 import org.graalvm.compiler.nodes.GetObjectAddressNode;
107 import org.graalvm.compiler.nodes.Invoke;
108 import org.graalvm.compiler.nodes.LogicNode;
109 import org.graalvm.compiler.nodes.LoweredCallTargetNode;
110 import org.graalvm.compiler.nodes.NodeView;
111 import org.graalvm.compiler.nodes.ParameterNode;
112 import org.graalvm.compiler.nodes.SafepointNode;
113 import org.graalvm.compiler.nodes.StartNode;
114 import org.graalvm.compiler.nodes.StructuredGraph;
115 import org.graalvm.compiler.nodes.UnwindNode;
116 import org.graalvm.compiler.nodes.ValueNode;
117 import org.graalvm.compiler.nodes.calc.AddNode;
118 import org.graalvm.compiler.nodes.calc.FloatingNode;
119 import org.graalvm.compiler.nodes.calc.IntegerDivRemNode;
120 import org.graalvm.compiler.nodes.calc.IsNullNode;
121 import org.graalvm.compiler.nodes.calc.RemNode;
122 import org.graalvm.compiler.nodes.debug.StringToBytesNode;
123 import org.graalvm.compiler.nodes.debug.VerifyHeapNode;
124 import org.graalvm.compiler.nodes.extended.BytecodeExceptionNode;
125 import org.graalvm.compiler.nodes.extended.BytecodeExceptionNode.BytecodeExceptionKind;
126 import org.graalvm.compiler.nodes.extended.ForeignCallNode;
127 import org.graalvm.compiler.nodes.extended.GetClassNode;
128 import org.graalvm.compiler.nodes.extended.GuardedUnsafeLoadNode;
129 import org.graalvm.compiler.nodes.extended.LoadHubNode;
130 import org.graalvm.compiler.nodes.extended.LoadMethodNode;
131 import org.graalvm.compiler.nodes.extended.OSRLocalNode;
132 import org.graalvm.compiler.nodes.extended.OSRLockNode;
133 import org.graalvm.compiler.nodes.extended.OSRMonitorEnterNode;
134 import org.graalvm.compiler.nodes.extended.OSRStartNode;
135 import org.graalvm.compiler.nodes.extended.RawLoadNode;
136 import org.graalvm.compiler.nodes.extended.StoreHubNode;
137 import org.graalvm.compiler.nodes.java.ClassIsAssignableFromNode;
138 import org.graalvm.compiler.nodes.java.DynamicNewArrayNode;
139 import org.graalvm.compiler.nodes.java.DynamicNewInstanceNode;
140 import org.graalvm.compiler.nodes.java.InstanceOfDynamicNode;
141 import org.graalvm.compiler.nodes.java.InstanceOfNode;
142 import org.graalvm.compiler.nodes.java.LoadExceptionObjectNode;
143 import org.graalvm.compiler.nodes.java.MethodCallTargetNode;
144 import org.graalvm.compiler.nodes.java.MonitorExitNode;
145 import org.graalvm.compiler.nodes.java.MonitorIdNode;
146 import org.graalvm.compiler.nodes.java.NewArrayNode;
147 import org.graalvm.compiler.nodes.java.NewInstanceNode;
148 import org.graalvm.compiler.nodes.java.NewMultiArrayNode;
149 import org.graalvm.compiler.nodes.java.RawMonitorEnterNode;
150 import org.graalvm.compiler.nodes.memory.FloatingReadNode;
151 import org.graalvm.compiler.nodes.memory.HeapAccess.BarrierType;
152 import org.graalvm.compiler.nodes.memory.ReadNode;
153 import org.graalvm.compiler.nodes.memory.WriteNode;
154 import org.graalvm.compiler.nodes.memory.address.AddressNode;
155 import org.graalvm.compiler.nodes.spi.LoweringProvider;
156 import org.graalvm.compiler.nodes.spi.LoweringTool;
157 import org.graalvm.compiler.nodes.spi.StampProvider;
158 import org.graalvm.compiler.nodes.type.StampTool;
159 import org.graalvm.compiler.nodes.util.GraphUtil;
160 import org.graalvm.compiler.options.OptionValues;
161 import org.graalvm.compiler.replacements.DefaultJavaLoweringProvider;
162 import org.graalvm.compiler.replacements.arraycopy.ArrayCopyNode;
163 import org.graalvm.compiler.replacements.arraycopy.ArrayCopySnippets;
164 import org.graalvm.compiler.replacements.arraycopy.ArrayCopyWithSlowPathNode;
165 import org.graalvm.compiler.replacements.nodes.AssertionNode;
166 import org.graalvm.compiler.serviceprovider.JavaVersionUtil;
167 import jdk.internal.vm.compiler.word.LocationIdentity;
168
169 import jdk.vm.ci.code.TargetDescription;
170 import jdk.vm.ci.hotspot.HotSpotCallingConventionType;
171 import jdk.vm.ci.hotspot.HotSpotConstantReflectionProvider;
172 import jdk.vm.ci.hotspot.HotSpotResolvedJavaField;
173 import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
174 import jdk.vm.ci.meta.JavaConstant;
175 import jdk.vm.ci.meta.JavaKind;
176 import jdk.vm.ci.meta.JavaType;
177 import jdk.vm.ci.meta.MetaAccessProvider;
178 import jdk.vm.ci.meta.ResolvedJavaField;
179 import jdk.vm.ci.meta.ResolvedJavaType;
180
181 /**
182 * HotSpot implementation of {@link LoweringProvider}.
183 */
184 public class DefaultHotSpotLoweringProvider extends DefaultJavaLoweringProvider implements HotSpotLoweringProvider {
185
186 protected final HotSpotGraalRuntimeProvider runtime;
187 protected final HotSpotRegistersProvider registers;
188 protected final HotSpotConstantReflectionProvider constantReflection;
189
190 protected InstanceOfSnippets.Templates instanceofSnippets;
191 protected NewObjectSnippets.Templates newObjectSnippets;
192 protected MonitorSnippets.Templates monitorSnippets;
193 protected WriteBarrierSnippets.Templates writeBarrierSnippets;
194 protected LoadExceptionObjectSnippets.Templates exceptionObjectSnippets;
195 protected UnsafeLoadSnippets.Templates unsafeLoadSnippets;
196 protected AssertionSnippets.Templates assertionSnippets;
197 protected ArrayCopySnippets.Templates arraycopySnippets;
198 protected StringToBytesSnippets.Templates stringToBytesSnippets;
199 protected HashCodeSnippets.Templates hashCodeSnippets;
200 protected ResolveConstantSnippets.Templates resolveConstantSnippets;
201 protected ProfileSnippets.Templates profileSnippets;
202
203 protected ObjectCloneSnippets.Templates objectCloneSnippets;
204 protected ForeignCallSnippets.Templates foreignCallSnippets;
205
206 public DefaultHotSpotLoweringProvider(HotSpotGraalRuntimeProvider runtime, MetaAccessProvider metaAccess, ForeignCallsProvider foreignCalls, HotSpotRegistersProvider registers,
207 HotSpotConstantReflectionProvider constantReflection, TargetDescription target) {
208 super(metaAccess, foreignCalls, target, runtime.getVMConfig().useCompressedOops);
209 this.runtime = runtime;
210 this.registers = registers;
211 this.constantReflection = constantReflection;
212 }
213
214 @Override
215 public void initialize(OptionValues options, Iterable<DebugHandlersFactory> factories, HotSpotProviders providers, GraalHotSpotVMConfig config) {
216 super.initialize(options, factories, runtime, providers, providers.getSnippetReflection());
217
218 assert target == providers.getCodeCache().getTarget();
219 instanceofSnippets = new InstanceOfSnippets.Templates(options, factories, runtime, providers, target);
220 newObjectSnippets = new NewObjectSnippets.Templates(options, factories, runtime, providers, target, config);
221 monitorSnippets = new MonitorSnippets.Templates(options, factories, runtime, providers, target, config.useFastLocking);
222 writeBarrierSnippets = new WriteBarrierSnippets.Templates(options, factories, runtime, providers, target, config);
223 exceptionObjectSnippets = new LoadExceptionObjectSnippets.Templates(options, factories, providers, target);
224 unsafeLoadSnippets = new UnsafeLoadSnippets.Templates(options, factories, providers, target);
225 assertionSnippets = new AssertionSnippets.Templates(options, factories, providers, target);
226 arraycopySnippets = new ArrayCopySnippets.Templates(new HotSpotArraycopySnippets(), options, factories, runtime, providers, providers.getSnippetReflection(), target);
227 stringToBytesSnippets = new StringToBytesSnippets.Templates(options, factories, providers, target);
228 hashCodeSnippets = new HashCodeSnippets.Templates(options, factories, providers, target);
229 resolveConstantSnippets = new ResolveConstantSnippets.Templates(options, factories, providers, target);
230 if (!JavaVersionUtil.Java8OrEarlier) {
231 profileSnippets = new ProfileSnippets.Templates(options, factories, providers, target);
232 }
233 objectCloneSnippets = new ObjectCloneSnippets.Templates(options, factories, providers, target);
234 foreignCallSnippets = new ForeignCallSnippets.Templates(options, factories, providers, target);
235 }
236
237 public MonitorSnippets.Templates getMonitorSnippets() {
238 return monitorSnippets;
239 }
240
241 @Override
242 @SuppressWarnings("try")
243 public void lower(Node n, LoweringTool tool) {
244 StructuredGraph graph = (StructuredGraph) n.graph();
245 try (DebugCloseable context = n.withNodeSourcePosition()) {
246 if (n instanceof Invoke) {
247 lowerInvoke((Invoke) n, tool, graph);
248 } else if (n instanceof LoadMethodNode) {
249 lowerLoadMethodNode((LoadMethodNode) n);
250 } else if (n instanceof GetClassNode) {
251 lowerGetClassNode((GetClassNode) n, tool, graph);
252 } else if (n instanceof StoreHubNode) {
253 lowerStoreHubNode((StoreHubNode) n, graph);
254 } else if (n instanceof OSRStartNode) {
255 lowerOSRStartNode((OSRStartNode) n);
256 } else if (n instanceof BytecodeExceptionNode) {
257 lowerBytecodeExceptionNode((BytecodeExceptionNode) n);
258 } else if (n instanceof InstanceOfNode) {
259 InstanceOfNode instanceOfNode = (InstanceOfNode) n;
260 if (graph.getGuardsStage().areDeoptsFixed()) {
261 instanceofSnippets.lower(instanceOfNode, tool);
262 } else {
263 if (instanceOfNode.allowsNull()) {
264 ValueNode object = instanceOfNode.getValue();
265 LogicNode newTypeCheck = graph.addOrUniqueWithInputs(InstanceOfNode.create(instanceOfNode.type(), object, instanceOfNode.profile(), instanceOfNode.getAnchor()));
266 LogicNode newNode = LogicNode.or(graph.unique(IsNullNode.create(object)), newTypeCheck, GraalDirectives.UNLIKELY_PROBABILITY);
267 instanceOfNode.replaceAndDelete(newNode);
268 }
269 }
270 } else if (n instanceof InstanceOfDynamicNode) {
271 InstanceOfDynamicNode instanceOfDynamicNode = (InstanceOfDynamicNode) n;
272 if (graph.getGuardsStage().areDeoptsFixed()) {
273 instanceofSnippets.lower(instanceOfDynamicNode, tool);
274 } else {
275 ValueNode mirror = instanceOfDynamicNode.getMirrorOrHub();
276 if (mirror.stamp(NodeView.DEFAULT).getStackKind() == JavaKind.Object) {
277 ClassGetHubNode classGetHub = graph.unique(new ClassGetHubNode(mirror));
278 instanceOfDynamicNode.setMirror(classGetHub);
279 }
280
281 if (instanceOfDynamicNode.allowsNull()) {
282 ValueNode object = instanceOfDynamicNode.getObject();
283 LogicNode newTypeCheck = graph.addOrUniqueWithInputs(
284 InstanceOfDynamicNode.create(graph.getAssumptions(), tool.getConstantReflection(), instanceOfDynamicNode.getMirrorOrHub(), object, false));
285 LogicNode newNode = LogicNode.or(graph.unique(IsNullNode.create(object)), newTypeCheck, GraalDirectives.UNLIKELY_PROBABILITY);
286 instanceOfDynamicNode.replaceAndDelete(newNode);
287 }
288 }
289 } else if (n instanceof ClassIsAssignableFromNode) {
290 if (graph.getGuardsStage().areDeoptsFixed()) {
291 instanceofSnippets.lower((ClassIsAssignableFromNode) n, tool);
292 }
293 } else if (n instanceof NewInstanceNode) {
294 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
295 newObjectSnippets.lower((NewInstanceNode) n, registers, tool);
296 }
297 } else if (n instanceof DynamicNewInstanceNode) {
298 DynamicNewInstanceNode newInstanceNode = (DynamicNewInstanceNode) n;
299 if (newInstanceNode.getClassClass() == null) {
300 JavaConstant classClassMirror = constantReflection.asJavaClass(metaAccess.lookupJavaType(Class.class));
301 ConstantNode classClass = ConstantNode.forConstant(classClassMirror, tool.getMetaAccess(), graph);
302 newInstanceNode.setClassClass(classClass);
303 }
304 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
305 newObjectSnippets.lower(newInstanceNode, registers, tool);
306 }
307 } else if (n instanceof NewArrayNode) {
308 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
309 newObjectSnippets.lower((NewArrayNode) n, registers, tool);
310 }
311 } else if (n instanceof DynamicNewArrayNode) {
312 DynamicNewArrayNode dynamicNewArrayNode = (DynamicNewArrayNode) n;
313 if (dynamicNewArrayNode.getVoidClass() == null) {
314 JavaConstant voidClassMirror = constantReflection.asJavaClass(metaAccess.lookupJavaType(void.class));
315 ConstantNode voidClass = ConstantNode.forConstant(voidClassMirror, tool.getMetaAccess(), graph);
316 dynamicNewArrayNode.setVoidClass(voidClass);
317 }
318 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
319 newObjectSnippets.lower(dynamicNewArrayNode, registers, tool);
320 }
321 } else if (n instanceof VerifyHeapNode) {
322 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
323 newObjectSnippets.lower((VerifyHeapNode) n, registers, tool);
324 }
325 } else if (n instanceof RawMonitorEnterNode) {
326 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
327 monitorSnippets.lower((RawMonitorEnterNode) n, registers, tool);
328 }
329 } else if (n instanceof MonitorExitNode) {
330 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
331 monitorSnippets.lower((MonitorExitNode) n, registers, tool);
332 }
333 } else if (n instanceof ArrayCopyNode) {
334 arraycopySnippets.lower((ArrayCopyNode) n, tool);
335 } else if (n instanceof ArrayCopyWithSlowPathNode) {
336 arraycopySnippets.lower((ArrayCopyWithSlowPathNode) n, tool);
337 } else if (n instanceof G1PreWriteBarrier) {
338 writeBarrierSnippets.lower((G1PreWriteBarrier) n, registers, tool);
339 } else if (n instanceof G1PostWriteBarrier) {
340 writeBarrierSnippets.lower((G1PostWriteBarrier) n, registers, tool);
341 } else if (n instanceof G1ReferentFieldReadBarrier) {
342 writeBarrierSnippets.lower((G1ReferentFieldReadBarrier) n, registers, tool);
343 } else if (n instanceof SerialWriteBarrier) {
344 writeBarrierSnippets.lower((SerialWriteBarrier) n, tool);
345 } else if (n instanceof SerialArrayRangeWriteBarrier) {
346 writeBarrierSnippets.lower((SerialArrayRangeWriteBarrier) n, tool);
347 } else if (n instanceof G1ArrayRangePreWriteBarrier) {
348 writeBarrierSnippets.lower((G1ArrayRangePreWriteBarrier) n, registers, tool);
349 } else if (n instanceof G1ArrayRangePostWriteBarrier) {
350 writeBarrierSnippets.lower((G1ArrayRangePostWriteBarrier) n, registers, tool);
351 } else if (n instanceof NewMultiArrayNode) {
352 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
353 newObjectSnippets.lower((NewMultiArrayNode) n, tool);
354 }
355 } else if (n instanceof LoadExceptionObjectNode) {
356 exceptionObjectSnippets.lower((LoadExceptionObjectNode) n, registers, tool);
357 } else if (n instanceof AssertionNode) {
358 assertionSnippets.lower((AssertionNode) n, tool);
359 } else if (n instanceof StringToBytesNode) {
360 if (graph.getGuardsStage().areDeoptsFixed()) {
361 stringToBytesSnippets.lower((StringToBytesNode) n, tool);
362 }
363 } else if (n instanceof IntegerDivRemNode) {
364 // Nothing to do for division nodes. The HotSpot signal handler catches divisions by
365 // zero and the MIN_VALUE / -1 cases.
366 } else if (n instanceof AbstractDeoptimizeNode || n instanceof UnwindNode || n instanceof RemNode || n instanceof SafepointNode) {
367 /* No lowering, we generate LIR directly for these nodes. */
368 } else if (n instanceof ClassGetHubNode) {
369 lowerClassGetHubNode((ClassGetHubNode) n, tool);
370 } else if (n instanceof HubGetClassNode) {
371 lowerHubGetClassNode((HubGetClassNode) n, tool);
372 } else if (n instanceof KlassLayoutHelperNode) {
373 lowerKlassLayoutHelperNode((KlassLayoutHelperNode) n, tool);
374 } else if (n instanceof ComputeObjectAddressNode) {
375 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
376 lowerComputeObjectAddressNode((ComputeObjectAddressNode) n);
377 }
378 } else if (n instanceof IdentityHashCodeNode) {
379 hashCodeSnippets.lower((IdentityHashCodeNode) n, tool);
380 } else if (n instanceof ResolveDynamicConstantNode) {
381 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
382 resolveConstantSnippets.lower((ResolveDynamicConstantNode) n, tool);
383 }
384 } else if (n instanceof ResolveConstantNode) {
385 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
386 resolveConstantSnippets.lower((ResolveConstantNode) n, tool);
387 }
388 } else if (n instanceof ResolveMethodAndLoadCountersNode) {
389 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
390 resolveConstantSnippets.lower((ResolveMethodAndLoadCountersNode) n, tool);
391 }
392 } else if (n instanceof InitializeKlassNode) {
393 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
394 resolveConstantSnippets.lower((InitializeKlassNode) n, tool);
395 }
396 } else if (n instanceof ProfileNode) {
397 profileSnippets.lower((ProfileNode) n, tool);
398 } else {
399 super.lower(n, tool);
400 }
401 }
402 }
403
404 private static void lowerComputeObjectAddressNode(ComputeObjectAddressNode n) {
405 /*
406 * Lower the node into a ComputeObjectAddress node and an Add but ensure that it's below any
407 * potential safepoints and above it's uses.
408 */
409 for (Node use : n.usages().snapshot()) {
410 if (use instanceof FixedNode) {
411 FixedNode fixed = (FixedNode) use;
412 StructuredGraph graph = n.graph();
413 GetObjectAddressNode address = graph.add(new GetObjectAddressNode(n.getObject()));
414 graph.addBeforeFixed(fixed, address);
415 AddNode add = graph.addOrUnique(new AddNode(address, n.getOffset()));
416 use.replaceFirstInput(n, add);
417 } else {
418 throw GraalError.shouldNotReachHere("Unexpected floating use of ComputeObjectAddressNode " + n);
419 }
420 }
421 GraphUtil.unlinkFixedNode(n);
422 n.safeDelete();
423 }
424
425 private void lowerKlassLayoutHelperNode(KlassLayoutHelperNode n, LoweringTool tool) {
426 if (tool.getLoweringStage() == LoweringTool.StandardLoweringStage.HIGH_TIER) {
427 return;
428 }
429 StructuredGraph graph = n.graph();
430 assert !n.getHub().isConstant();
431 AddressNode address = createOffsetAddress(graph, n.getHub(), runtime.getVMConfig().klassLayoutHelperOffset);
432 n.replaceAtUsagesAndDelete(graph.unique(new FloatingReadNode(address, KLASS_LAYOUT_HELPER_LOCATION, null, n.stamp(NodeView.DEFAULT), null, BarrierType.NONE)));
433 }
434
435 private void lowerHubGetClassNode(HubGetClassNode n, LoweringTool tool) {
436 if (tool.getLoweringStage() == LoweringTool.StandardLoweringStage.HIGH_TIER) {
437 return;
438 }
439
440 ValueNode hub = n.getHub();
441 GraalHotSpotVMConfig vmConfig = runtime.getVMConfig();
442 StructuredGraph graph = n.graph();
443 assert !hub.isConstant() || GraalOptions.ImmutableCode.getValue(graph.getOptions());
444 AddressNode mirrorAddress = createOffsetAddress(graph, hub, vmConfig.classMirrorOffset);
445 FloatingReadNode read = graph.unique(
446 new FloatingReadNode(mirrorAddress, CLASS_MIRROR_LOCATION, null, vmConfig.classMirrorIsHandle ? StampFactory.forKind(target.wordJavaKind) : n.stamp(NodeView.DEFAULT),
447 null, BarrierType.NONE));
448 if (vmConfig.classMirrorIsHandle) {
449 AddressNode address = createOffsetAddress(graph, read, 0);
450 read = graph.unique(new FloatingReadNode(address, CLASS_MIRROR_HANDLE_LOCATION, null, n.stamp(NodeView.DEFAULT), null, BarrierType.NONE));
451 }
452 n.replaceAtUsagesAndDelete(read);
453 }
454
455 private void lowerClassGetHubNode(ClassGetHubNode n, LoweringTool tool) {
456 if (tool.getLoweringStage() == LoweringTool.StandardLoweringStage.HIGH_TIER) {
457 return;
458 }
459
460 StructuredGraph graph = n.graph();
461 assert !n.getValue().isConstant();
462 AddressNode address = createOffsetAddress(graph, n.getValue(), runtime.getVMConfig().klassOffset);
463 FloatingReadNode read = graph.unique(new FloatingReadNode(address, CLASS_KLASS_LOCATION, null, n.stamp(NodeView.DEFAULT), null, BarrierType.NONE));
464 n.replaceAtUsagesAndDelete(read);
465 }
466
467 private void lowerInvoke(Invoke invoke, LoweringTool tool, StructuredGraph graph) {
468 if (invoke.callTarget() instanceof MethodCallTargetNode) {
469 MethodCallTargetNode callTarget = (MethodCallTargetNode) invoke.callTarget();
470 NodeInputList<ValueNode> parameters = callTarget.arguments();
471 ValueNode receiver = parameters.size() <= 0 ? null : parameters.get(0);
472 if (!callTarget.isStatic() && receiver.stamp(NodeView.DEFAULT) instanceof ObjectStamp && !StampTool.isPointerNonNull(receiver)) {
473 ValueNode nonNullReceiver = createNullCheckedValue(receiver, invoke.asNode(), tool);
474 parameters.set(0, nonNullReceiver);
475 receiver = nonNullReceiver;
476 }
477 JavaType[] signature = callTarget.targetMethod().getSignature().toParameterTypes(callTarget.isStatic() ? null : callTarget.targetMethod().getDeclaringClass());
478
479 LoweredCallTargetNode loweredCallTarget = null;
480 OptionValues options = graph.getOptions();
481 if (InlineVTableStubs.getValue(options) && callTarget.invokeKind().isIndirect() && (AlwaysInlineVTableStubs.getValue(options) || invoke.isPolymorphic())) {
482 HotSpotResolvedJavaMethod hsMethod = (HotSpotResolvedJavaMethod) callTarget.targetMethod();
483 ResolvedJavaType receiverType = invoke.getReceiverType();
484 if (hsMethod.isInVirtualMethodTable(receiverType)) {
485 JavaKind wordKind = runtime.getTarget().wordJavaKind;
486 ValueNode hub = createReadHub(graph, receiver, tool);
487
488 ReadNode metaspaceMethod = createReadVirtualMethod(graph, hub, hsMethod, receiverType);
489 // We use LocationNode.ANY_LOCATION for the reads that access the
490 // compiled code entry as HotSpot does not guarantee they are final
491 // values.
492 int methodCompiledEntryOffset = runtime.getVMConfig().methodCompiledEntryOffset;
493 AddressNode address = createOffsetAddress(graph, metaspaceMethod, methodCompiledEntryOffset);
494 ReadNode compiledEntry = graph.add(new ReadNode(address, any(), StampFactory.forKind(wordKind), BarrierType.NONE));
495
496 loweredCallTarget = graph.add(new HotSpotIndirectCallTargetNode(metaspaceMethod, compiledEntry, parameters.toArray(new ValueNode[parameters.size()]), callTarget.returnStamp(),
497 signature, callTarget.targetMethod(),
498 HotSpotCallingConventionType.JavaCall, callTarget.invokeKind()));
499
500 graph.addBeforeFixed(invoke.asNode(), metaspaceMethod);
501 graph.addAfterFixed(metaspaceMethod, compiledEntry);
502 }
503 }
504
505 if (loweredCallTarget == null) {
506 loweredCallTarget = graph.add(new HotSpotDirectCallTargetNode(parameters.toArray(new ValueNode[parameters.size()]), callTarget.returnStamp(),
507 signature, callTarget.targetMethod(),
508 HotSpotCallingConventionType.JavaCall,
509 callTarget.invokeKind()));
510 }
511 callTarget.replaceAndDelete(loweredCallTarget);
512 }
513 }
514
515 private CompressEncoding getOopEncoding() {
516 return runtime.getVMConfig().getOopEncoding();
517 }
518
519 @Override
520 protected Stamp loadCompressedStamp(ObjectStamp stamp) {
521 return HotSpotNarrowOopStamp.compressed(stamp, getOopEncoding());
522 }
523
524 @Override
525 protected ValueNode newCompressionNode(CompressionOp op, ValueNode value) {
526 return new HotSpotCompressionNode(op, value, getOopEncoding());
527 }
528
529 @Override
530 public ValueNode staticFieldBase(StructuredGraph graph, ResolvedJavaField f) {
531 HotSpotResolvedJavaField field = (HotSpotResolvedJavaField) f;
532 JavaConstant base = constantReflection.asJavaClass(field.getDeclaringClass());
533 return ConstantNode.forConstant(base, metaAccess, graph);
534 }
535
536 @Override
537 protected ValueNode createReadArrayComponentHub(StructuredGraph graph, ValueNode arrayHub, FixedNode anchor) {
538 /*
539 * Anchor the read of the element klass to the cfg, because it is only valid when arrayClass
540 * is an object class, which might not be the case in other parts of the compiled method.
541 */
542 AddressNode address = createOffsetAddress(graph, arrayHub, runtime.getVMConfig().arrayClassElementOffset);
543 return graph.unique(new FloatingReadNode(address, OBJ_ARRAY_KLASS_ELEMENT_KLASS_LOCATION, null, KlassPointerStamp.klassNonNull(), AbstractBeginNode.prevBegin(anchor)));
544 }
545
546 @Override
547 protected void lowerUnsafeLoadNode(RawLoadNode load, LoweringTool tool) {
548 StructuredGraph graph = load.graph();
549 if (!(load instanceof GuardedUnsafeLoadNode) && !graph.getGuardsStage().allowsFloatingGuards() && addReadBarrier(load)) {
550 unsafeLoadSnippets.lower(load, tool);
551 } else {
552 super.lowerUnsafeLoadNode(load, tool);
553 }
554 }
555
556 private void lowerLoadMethodNode(LoadMethodNode loadMethodNode) {
557 StructuredGraph graph = loadMethodNode.graph();
558 HotSpotResolvedJavaMethod method = (HotSpotResolvedJavaMethod) loadMethodNode.getMethod();
559 ReadNode metaspaceMethod = createReadVirtualMethod(graph, loadMethodNode.getHub(), method, loadMethodNode.getReceiverType());
560 graph.replaceFixed(loadMethodNode, metaspaceMethod);
561 }
562
563 private static void lowerGetClassNode(GetClassNode getClass, LoweringTool tool, StructuredGraph graph) {
564 StampProvider stampProvider = tool.getStampProvider();
565 LoadHubNode hub = graph.unique(new LoadHubNode(stampProvider, getClass.getObject()));
566 HubGetClassNode hubGetClass = graph.unique(new HubGetClassNode(tool.getMetaAccess(), hub));
567 getClass.replaceAtUsagesAndDelete(hubGetClass);
568 hub.lower(tool);
569 hubGetClass.lower(tool);
570 }
571
572 private void lowerStoreHubNode(StoreHubNode storeHub, StructuredGraph graph) {
573 WriteNode hub = createWriteHub(graph, storeHub.getObject(), storeHub.getValue());
574 graph.replaceFixed(storeHub, hub);
575 }
576
577 @Override
578 public BarrierType fieldInitializationBarrier(JavaKind entryKind) {
579 return (entryKind == JavaKind.Object && !runtime.getVMConfig().useDeferredInitBarriers) ? BarrierType.IMPRECISE : BarrierType.NONE;
580 }
581
582 @Override
583 public BarrierType arrayInitializationBarrier(JavaKind entryKind) {
584 return (entryKind == JavaKind.Object && !runtime.getVMConfig().useDeferredInitBarriers) ? BarrierType.PRECISE : BarrierType.NONE;
585 }
586
587 private void lowerOSRStartNode(OSRStartNode osrStart) {
588 StructuredGraph graph = osrStart.graph();
589 if (graph.getGuardsStage() == StructuredGraph.GuardsStage.FIXED_DEOPTS) {
590 StartNode newStart = graph.add(new StartNode());
591 ParameterNode buffer = graph.addWithoutUnique(new ParameterNode(0, StampPair.createSingle(StampFactory.forKind(runtime.getTarget().wordJavaKind))));
592 ForeignCallNode migrationEnd = graph.add(new ForeignCallNode(foreignCalls, OSR_MIGRATION_END, buffer));
593 migrationEnd.setStateAfter(osrStart.stateAfter());
594 newStart.setNext(migrationEnd);
595 FixedNode next = osrStart.next();
596 osrStart.setNext(null);
597 migrationEnd.setNext(next);
598 graph.setStart(newStart);
599
600 final int wordSize = target.wordSize;
601
602 // @formatter:off
603 // taken from c2 locals_addr = osr_buf + (max_locals-1)*wordSize)
604 // @formatter:on
605 int localsOffset = (graph.method().getMaxLocals() - 1) * wordSize;
606 for (OSRLocalNode osrLocal : graph.getNodes(OSRLocalNode.TYPE)) {
607 int size = osrLocal.getStackKind().getSlotCount();
608 int offset = localsOffset - (osrLocal.index() + size - 1) * wordSize;
609 AddressNode address = createOffsetAddress(graph, buffer, offset);
610 ReadNode load = graph.add(new ReadNode(address, any(), osrLocal.stamp(NodeView.DEFAULT), BarrierType.NONE));
611 osrLocal.replaceAndDelete(load);
612 graph.addBeforeFixed(migrationEnd, load);
613 }
614
615 // @formatter:off
616 // taken from c2 monitors_addr = osr_buf + (max_locals+mcnt*2-1)*wordSize);
617 // @formatter:on
618 final int lockCount = osrStart.stateAfter().locksSize();
619 final int locksOffset = (graph.method().getMaxLocals() + lockCount * 2 - 1) * wordSize;
620
621 // first initialize the lock slots for all enters with the displaced marks read from the
622 // buffer
623 for (OSRMonitorEnterNode osrMonitorEnter : graph.getNodes(OSRMonitorEnterNode.TYPE)) {
624 MonitorIdNode monitorID = osrMonitorEnter.getMonitorId();
625 OSRLockNode lock = (OSRLockNode) osrMonitorEnter.object();
626 final int index = lock.index();
627
628 final int offsetDisplacedHeader = locksOffset - ((index * 2) + 1) * wordSize;
629 final int offsetLockObject = locksOffset - index * 2 * wordSize;
630
631 // load the displaced mark from the osr buffer
632 AddressNode addressDisplacedHeader = createOffsetAddress(graph, buffer, offsetDisplacedHeader);
633 ReadNode loadDisplacedHeader = graph.add(new ReadNode(addressDisplacedHeader, any(), lock.stamp(NodeView.DEFAULT), BarrierType.NONE));
634 graph.addBeforeFixed(migrationEnd, loadDisplacedHeader);
635
636 // we need to initialize the stack slot for the lock
637 BeginLockScopeNode beginLockScope = graph.add(new BeginLockScopeNode(lock.getStackKind(), monitorID.getLockDepth()));
638 graph.addBeforeFixed(migrationEnd, beginLockScope);
639
640 // write the displaced mark to the correct stack slot
641 AddressNode addressDisplacedMark = createOffsetAddress(graph, beginLockScope, runtime.getVMConfig().basicLockDisplacedHeaderOffset);
642 WriteNode writeStackSlot = graph.add(new WriteNode(addressDisplacedMark, DISPLACED_MARK_WORD_LOCATION, loadDisplacedHeader, BarrierType.NONE));
643 graph.addBeforeFixed(migrationEnd, writeStackSlot);
644
645 // load the lock object from the osr buffer
646 AddressNode addressLockObject = createOffsetAddress(graph, buffer, offsetLockObject);
647 ReadNode loadObject = graph.add(new ReadNode(addressLockObject, any(), lock.stamp(NodeView.DEFAULT), BarrierType.NONE));
648 lock.replaceAndDelete(loadObject);
649 graph.addBeforeFixed(migrationEnd, loadObject);
650 }
651
652 osrStart.replaceAtUsagesAndDelete(newStart);
653 }
654 }
655
656 static final class Exceptions {
657 protected static final EnumMap<BytecodeExceptionKind, RuntimeException> cachedExceptions;
658
659 static {
660 cachedExceptions = new EnumMap<>(BytecodeExceptionKind.class);
661 cachedExceptions.put(BytecodeExceptionKind.NULL_POINTER, clearStackTrace(new NullPointerException()));
662 cachedExceptions.put(BytecodeExceptionKind.OUT_OF_BOUNDS, clearStackTrace(new ArrayIndexOutOfBoundsException()));
663 cachedExceptions.put(BytecodeExceptionKind.CLASS_CAST, clearStackTrace(new ClassCastException()));
664 cachedExceptions.put(BytecodeExceptionKind.ARRAY_STORE, clearStackTrace(new ArrayStoreException()));
665 cachedExceptions.put(BytecodeExceptionKind.DIVISION_BY_ZERO, clearStackTrace(new ArithmeticException()));
666 }
667
668 private static RuntimeException clearStackTrace(RuntimeException ex) {
669 ex.setStackTrace(new StackTraceElement[0]);
670 return ex;
671 }
672 }
673
674 public static final class RuntimeCalls {
675 public static final EnumMap<BytecodeExceptionKind, ForeignCallDescriptor> runtimeCalls;
676
677 static {
678 runtimeCalls = new EnumMap<>(BytecodeExceptionKind.class);
679 runtimeCalls.put(BytecodeExceptionKind.ARRAY_STORE, new ForeignCallDescriptor("createArrayStoreException", ArrayStoreException.class, Object.class));
680 runtimeCalls.put(BytecodeExceptionKind.CLASS_CAST, new ForeignCallDescriptor("createClassCastException", ClassCastException.class, Object.class, KlassPointer.class));
681 runtimeCalls.put(BytecodeExceptionKind.NULL_POINTER, new ForeignCallDescriptor("createNullPointerException", NullPointerException.class));
682 runtimeCalls.put(BytecodeExceptionKind.OUT_OF_BOUNDS, new ForeignCallDescriptor("createOutOfBoundsException", ArrayIndexOutOfBoundsException.class, int.class, int.class));
683 runtimeCalls.put(BytecodeExceptionKind.DIVISION_BY_ZERO, new ForeignCallDescriptor("createDivisionByZeroException", ArithmeticException.class));
684 runtimeCalls.put(BytecodeExceptionKind.INTEGER_EXACT_OVERFLOW, new ForeignCallDescriptor("createIntegerExactOverflowException", ArithmeticException.class));
685 runtimeCalls.put(BytecodeExceptionKind.LONG_EXACT_OVERFLOW, new ForeignCallDescriptor("createLongExactOverflowException", ArithmeticException.class));
686 }
687 }
688
689 private void throwCachedException(BytecodeExceptionNode node) {
690 if (IS_IN_NATIVE_IMAGE) {
691 throw new InternalError("Can't throw exception from SVM object");
692 }
693 Throwable exception = Exceptions.cachedExceptions.get(node.getExceptionKind());
694 assert exception != null;
695
696 StructuredGraph graph = node.graph();
697 FloatingNode exceptionNode = ConstantNode.forConstant(constantReflection.forObject(exception), metaAccess, graph);
698 graph.replaceFixedWithFloating(node, exceptionNode);
699 }
700
701 private void lowerBytecodeExceptionNode(BytecodeExceptionNode node) {
702 if (OmitHotExceptionStacktrace.getValue(node.getOptions())) {
703 throwCachedException(node);
704 return;
705 }
706
707 ForeignCallDescriptor descriptor = RuntimeCalls.runtimeCalls.get(node.getExceptionKind());
708 assert descriptor != null;
709
710 StructuredGraph graph = node.graph();
711 ForeignCallNode foreignCallNode = graph.add(new ForeignCallNode(foreignCalls, descriptor, node.stamp(NodeView.DEFAULT), node.getArguments()));
712 graph.replaceFixedWithFixed(node, foreignCallNode);
713 }
714
715 private boolean addReadBarrier(RawLoadNode load) {
716 if (runtime.getVMConfig().useG1GC && load.graph().getGuardsStage() == StructuredGraph.GuardsStage.FIXED_DEOPTS && load.object().getStackKind() == JavaKind.Object &&
717 load.accessKind() == JavaKind.Object && !StampTool.isPointerAlwaysNull(load.object())) {
718 ResolvedJavaType type = StampTool.typeOrNull(load.object());
719 if (type != null && !type.isArray()) {
720 return true;
721 }
722 }
723 return false;
724 }
725
726 private ReadNode createReadVirtualMethod(StructuredGraph graph, ValueNode hub, HotSpotResolvedJavaMethod method, ResolvedJavaType receiverType) {
727 return createReadVirtualMethod(graph, hub, method.vtableEntryOffset(receiverType));
728 }
729
730 private ReadNode createReadVirtualMethod(StructuredGraph graph, ValueNode hub, int vtableEntryOffset) {
731 assert vtableEntryOffset > 0;
732 // We use LocationNode.ANY_LOCATION for the reads that access the vtable
733 // entry as HotSpot does not guarantee that this is a final value.
734 Stamp methodStamp = MethodPointerStamp.methodNonNull();
735 AddressNode address = createOffsetAddress(graph, hub, vtableEntryOffset);
736 ReadNode metaspaceMethod = graph.add(new ReadNode(address, any(), methodStamp, BarrierType.NONE));
737 return metaspaceMethod;
738 }
739
740 @Override
741 protected ValueNode createReadHub(StructuredGraph graph, ValueNode object, LoweringTool tool) {
742 if (tool.getLoweringStage() != LoweringTool.StandardLoweringStage.LOW_TIER) {
743 return graph.unique(new LoadHubNode(tool.getStampProvider(), object));
744 }
745 assert !object.isConstant() || object.isNullConstant();
746
747 KlassPointerStamp hubStamp = KlassPointerStamp.klassNonNull();
748 if (runtime.getVMConfig().useCompressedClassPointers) {
749 hubStamp = hubStamp.compressed(runtime.getVMConfig().getKlassEncoding());
750 }
751
752 AddressNode address = createOffsetAddress(graph, object, runtime.getVMConfig().hubOffset);
753 LocationIdentity hubLocation = runtime.getVMConfig().useCompressedClassPointers ? COMPRESSED_HUB_LOCATION : HUB_LOCATION;
754 FloatingReadNode memoryRead = graph.unique(new FloatingReadNode(address, hubLocation, null, hubStamp, null, BarrierType.NONE));
755 if (runtime.getVMConfig().useCompressedClassPointers) {
756 return HotSpotCompressionNode.uncompress(memoryRead, runtime.getVMConfig().getKlassEncoding());
757 } else {
758 return memoryRead;
759 }
760 }
761
762 private WriteNode createWriteHub(StructuredGraph graph, ValueNode object, ValueNode value) {
763 assert !object.isConstant() || object.asConstant().isDefaultForKind();
764
765 ValueNode writeValue = value;
766 if (runtime.getVMConfig().useCompressedClassPointers) {
767 writeValue = HotSpotCompressionNode.compress(value, runtime.getVMConfig().getKlassEncoding());
768 }
769
770 AddressNode address = createOffsetAddress(graph, object, runtime.getVMConfig().hubOffset);
771 return graph.add(new WriteNode(address, HUB_WRITE_LOCATION, writeValue, BarrierType.NONE));
772 }
773
774 @Override
775 protected BarrierType fieldLoadBarrierType(ResolvedJavaField f) {
776 HotSpotResolvedJavaField loadField = (HotSpotResolvedJavaField) f;
777 BarrierType barrierType = BarrierType.NONE;
778 if (runtime.getVMConfig().useG1GC && loadField.getJavaKind() == JavaKind.Object && metaAccess.lookupJavaType(Reference.class).equals(loadField.getDeclaringClass()) &&
779 loadField.getName().equals("referent")) {
780 barrierType = BarrierType.PRECISE;
781 }
782 return barrierType;
783 }
784
785 @Override
786 public int fieldOffset(ResolvedJavaField f) {
787 return f.getOffset();
788 }
789
790 @Override
791 public int arrayLengthOffset() {
792 return runtime.getVMConfig().arrayOopDescLengthOffset();
793 }
794
795 @Override
796 protected final JavaKind getStorageKind(ResolvedJavaField field) {
797 return field.getJavaKind();
798 }
799
800 @Override
801 public ObjectCloneSnippets.Templates getObjectCloneSnippets() {
802 return objectCloneSnippets;
803 }
804
805 @Override
806 public ForeignCallSnippets.Templates getForeignCallSnippets() {
807 return foreignCallSnippets;
808 }
809 }