1 /*
2 * Copyright (c) 2011, 2016, 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 package org.graalvm.compiler.hotspot.meta;
24
25 import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider.getArrayBaseOffset;
26 import static org.graalvm.compiler.core.common.GraalOptions.AlwaysInlineVTableStubs;
27 import static org.graalvm.compiler.core.common.GraalOptions.GeneratePIC;
28 import static org.graalvm.compiler.core.common.GraalOptions.InlineVTableStubs;
29 import static org.graalvm.compiler.core.common.GraalOptions.OmitHotExceptionStacktrace;
30 import static org.graalvm.compiler.hotspot.meta.HotSpotForeignCallsProviderImpl.OSR_MIGRATION_END;
31 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.CLASS_KLASS_LOCATION;
32 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.CLASS_MIRROR_LOCATION;
33 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.CLASS_MIRROR_HANDLE_LOCATION;
34 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.COMPRESSED_HUB_LOCATION;
35 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.DISPLACED_MARK_WORD_LOCATION;
36 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.HUB_LOCATION;
37 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.HUB_WRITE_LOCATION;
38 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_LAYOUT_HELPER_LOCATION;
39 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.OBJ_ARRAY_KLASS_ELEMENT_KLASS_LOCATION;
40 import static org.graalvm.word.LocationIdentity.any;
41
42 import java.lang.ref.Reference;
43
44 import org.graalvm.compiler.api.directives.GraalDirectives;
45 import org.graalvm.compiler.core.common.GraalOptions;
46 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
47 import org.graalvm.compiler.core.common.spi.ForeignCallsProvider;
48 import org.graalvm.compiler.core.common.type.ObjectStamp;
49 import org.graalvm.compiler.core.common.type.Stamp;
50 import org.graalvm.compiler.core.common.type.StampFactory;
51 import org.graalvm.compiler.core.common.type.StampPair;
52 import org.graalvm.compiler.debug.DebugHandlersFactory;
53 import org.graalvm.compiler.debug.GraalError;
54 import org.graalvm.compiler.graph.Node;
55 import org.graalvm.compiler.graph.NodeInputList;
56 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
57 import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;
58 import org.graalvm.compiler.hotspot.nodes.BeginLockScopeNode;
59 import org.graalvm.compiler.hotspot.nodes.ComputeObjectAddressNode;
60 import org.graalvm.compiler.hotspot.nodes.G1ArrayRangePostWriteBarrier;
61 import org.graalvm.compiler.hotspot.nodes.G1ArrayRangePreWriteBarrier;
62 import org.graalvm.compiler.hotspot.nodes.G1PostWriteBarrier;
63 import org.graalvm.compiler.hotspot.nodes.G1PreWriteBarrier;
64 import org.graalvm.compiler.hotspot.nodes.G1ReferentFieldReadBarrier;
65 import org.graalvm.compiler.hotspot.nodes.GetObjectAddressNode;
66 import org.graalvm.compiler.hotspot.nodes.HotSpotCompressionNode;
67 import org.graalvm.compiler.hotspot.nodes.HotSpotDirectCallTargetNode;
68 import org.graalvm.compiler.hotspot.nodes.HotSpotIndirectCallTargetNode;
69 import org.graalvm.compiler.hotspot.nodes.SerialArrayRangeWriteBarrier;
70 import org.graalvm.compiler.hotspot.nodes.SerialWriteBarrier;
71 import org.graalvm.compiler.hotspot.nodes.aot.InitializeKlassNode;
72 import org.graalvm.compiler.hotspot.nodes.aot.ResolveConstantNode;
73 import org.graalvm.compiler.hotspot.nodes.aot.ResolveMethodAndLoadCountersNode;
74 import org.graalvm.compiler.hotspot.nodes.profiling.ProfileNode;
75 import org.graalvm.compiler.hotspot.nodes.type.HotSpotNarrowOopStamp;
76 import org.graalvm.compiler.hotspot.nodes.type.KlassPointerStamp;
77 import org.graalvm.compiler.hotspot.nodes.type.MethodPointerStamp;
78 import org.graalvm.compiler.hotspot.replacements.AssertionSnippets;
79 import org.graalvm.compiler.hotspot.replacements.ClassGetHubNode;
80 import org.graalvm.compiler.hotspot.replacements.HashCodeSnippets;
81 import org.graalvm.compiler.hotspot.replacements.HubGetClassNode;
82 import org.graalvm.compiler.hotspot.replacements.IdentityHashCodeNode;
83 import org.graalvm.compiler.hotspot.replacements.InstanceOfSnippets;
84 import org.graalvm.compiler.hotspot.replacements.KlassLayoutHelperNode;
85 import org.graalvm.compiler.hotspot.replacements.LoadExceptionObjectSnippets;
86 import org.graalvm.compiler.hotspot.replacements.MonitorSnippets;
87 import org.graalvm.compiler.hotspot.replacements.NewObjectSnippets;
88 import org.graalvm.compiler.hotspot.replacements.StringToBytesSnippets;
89 import org.graalvm.compiler.hotspot.replacements.UnsafeLoadSnippets;
90 import org.graalvm.compiler.hotspot.replacements.WriteBarrierSnippets;
91 import org.graalvm.compiler.hotspot.replacements.aot.ResolveConstantSnippets;
92 import org.graalvm.compiler.hotspot.replacements.arraycopy.ArrayCopyNode;
93 import org.graalvm.compiler.hotspot.replacements.arraycopy.ArrayCopySlowPathNode;
94 import org.graalvm.compiler.hotspot.replacements.arraycopy.ArrayCopySnippets;
95 import org.graalvm.compiler.hotspot.replacements.arraycopy.ArrayCopyUnrollNode;
96 import org.graalvm.compiler.hotspot.replacements.arraycopy.UnsafeArrayCopySnippets;
97 import org.graalvm.compiler.hotspot.replacements.profiling.ProfileSnippets;
98 import org.graalvm.compiler.hotspot.word.KlassPointer;
99 import org.graalvm.compiler.nodes.AbstractBeginNode;
100 import org.graalvm.compiler.nodes.AbstractDeoptimizeNode;
101 import org.graalvm.compiler.nodes.CompressionNode.CompressionOp;
102 import org.graalvm.compiler.nodes.ConstantNode;
103 import org.graalvm.compiler.nodes.FixedNode;
104 import org.graalvm.compiler.nodes.Invoke;
105 import org.graalvm.compiler.nodes.LogicNode;
106 import org.graalvm.compiler.nodes.LoweredCallTargetNode;
107 import org.graalvm.compiler.nodes.ParameterNode;
108 import org.graalvm.compiler.nodes.SafepointNode;
109 import org.graalvm.compiler.nodes.StartNode;
110 import org.graalvm.compiler.nodes.StructuredGraph;
111 import org.graalvm.compiler.nodes.UnwindNode;
112 import org.graalvm.compiler.nodes.ValueNode;
113 import org.graalvm.compiler.nodes.calc.AddNode;
114 import org.graalvm.compiler.nodes.calc.FloatingNode;
115 import org.graalvm.compiler.nodes.calc.IntegerDivRemNode;
116 import org.graalvm.compiler.nodes.calc.IsNullNode;
117 import org.graalvm.compiler.nodes.calc.RemNode;
118 import org.graalvm.compiler.nodes.debug.StringToBytesNode;
119 import org.graalvm.compiler.nodes.debug.VerifyHeapNode;
120 import org.graalvm.compiler.nodes.extended.BytecodeExceptionNode;
121 import org.graalvm.compiler.nodes.extended.ForeignCallNode;
122 import org.graalvm.compiler.nodes.extended.GetClassNode;
123 import org.graalvm.compiler.nodes.extended.GuardedUnsafeLoadNode;
124 import org.graalvm.compiler.nodes.extended.LoadHubNode;
125 import org.graalvm.compiler.nodes.extended.LoadMethodNode;
126 import org.graalvm.compiler.nodes.extended.OSRLocalNode;
127 import org.graalvm.compiler.nodes.extended.OSRLockNode;
128 import org.graalvm.compiler.nodes.extended.OSRMonitorEnterNode;
129 import org.graalvm.compiler.nodes.extended.OSRStartNode;
130 import org.graalvm.compiler.nodes.extended.RawLoadNode;
131 import org.graalvm.compiler.nodes.extended.StoreHubNode;
132 import org.graalvm.compiler.nodes.java.ClassIsAssignableFromNode;
133 import org.graalvm.compiler.nodes.java.DynamicNewArrayNode;
134 import org.graalvm.compiler.nodes.java.DynamicNewInstanceNode;
135 import org.graalvm.compiler.nodes.java.InstanceOfDynamicNode;
136 import org.graalvm.compiler.nodes.java.InstanceOfNode;
137 import org.graalvm.compiler.nodes.java.LoadExceptionObjectNode;
138 import org.graalvm.compiler.nodes.java.MethodCallTargetNode;
139 import org.graalvm.compiler.nodes.java.MonitorExitNode;
140 import org.graalvm.compiler.nodes.java.MonitorIdNode;
141 import org.graalvm.compiler.nodes.java.NewArrayNode;
142 import org.graalvm.compiler.nodes.java.NewInstanceNode;
143 import org.graalvm.compiler.nodes.java.NewMultiArrayNode;
144 import org.graalvm.compiler.nodes.java.RawMonitorEnterNode;
145 import org.graalvm.compiler.nodes.memory.FloatingReadNode;
146 import org.graalvm.compiler.nodes.memory.HeapAccess.BarrierType;
147 import org.graalvm.compiler.nodes.memory.ReadNode;
148 import org.graalvm.compiler.nodes.memory.WriteNode;
149 import org.graalvm.compiler.nodes.memory.address.AddressNode;
150 import org.graalvm.compiler.nodes.spi.LoweringProvider;
151 import org.graalvm.compiler.nodes.spi.LoweringTool;
152 import org.graalvm.compiler.nodes.spi.StampProvider;
153 import org.graalvm.compiler.nodes.type.StampTool;
154 import org.graalvm.compiler.nodes.util.GraphUtil;
155 import org.graalvm.compiler.options.OptionValues;
156 import org.graalvm.compiler.replacements.DefaultJavaLoweringProvider;
157 import org.graalvm.compiler.replacements.nodes.AssertionNode;
158 import org.graalvm.word.LocationIdentity;
159
160 import jdk.vm.ci.code.TargetDescription;
161 import jdk.vm.ci.hotspot.HotSpotCallingConventionType;
162 import jdk.vm.ci.hotspot.HotSpotConstantReflectionProvider;
163 import jdk.vm.ci.hotspot.HotSpotResolvedJavaField;
164 import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
165 import jdk.vm.ci.meta.JavaConstant;
166 import jdk.vm.ci.meta.JavaKind;
167 import jdk.vm.ci.meta.JavaType;
168 import jdk.vm.ci.meta.MetaAccessProvider;
169 import jdk.vm.ci.meta.ResolvedJavaField;
170 import jdk.vm.ci.meta.ResolvedJavaType;
171
172 /**
173 * HotSpot implementation of {@link LoweringProvider}.
174 */
175 public class DefaultHotSpotLoweringProvider extends DefaultJavaLoweringProvider implements HotSpotLoweringProvider {
176
177 protected final HotSpotGraalRuntimeProvider runtime;
178 protected final HotSpotRegistersProvider registers;
179 protected final HotSpotConstantReflectionProvider constantReflection;
180
181 protected InstanceOfSnippets.Templates instanceofSnippets;
182 protected NewObjectSnippets.Templates newObjectSnippets;
183 protected MonitorSnippets.Templates monitorSnippets;
184 protected WriteBarrierSnippets.Templates writeBarrierSnippets;
185 protected LoadExceptionObjectSnippets.Templates exceptionObjectSnippets;
186 protected UnsafeLoadSnippets.Templates unsafeLoadSnippets;
187 protected AssertionSnippets.Templates assertionSnippets;
188 protected ArrayCopySnippets.Templates arraycopySnippets;
189 protected StringToBytesSnippets.Templates stringToBytesSnippets;
190 protected HashCodeSnippets.Templates hashCodeSnippets;
191 protected ResolveConstantSnippets.Templates resolveConstantSnippets;
192 protected ProfileSnippets.Templates profileSnippets;
193
194 public DefaultHotSpotLoweringProvider(HotSpotGraalRuntimeProvider runtime, MetaAccessProvider metaAccess, ForeignCallsProvider foreignCalls, HotSpotRegistersProvider registers,
195 HotSpotConstantReflectionProvider constantReflection, TargetDescription target) {
196 super(metaAccess, foreignCalls, target);
197 this.runtime = runtime;
198 this.registers = registers;
199 this.constantReflection = constantReflection;
200 }
201
202 @Override
203 public void initialize(OptionValues options, Iterable<DebugHandlersFactory> factories, HotSpotProviders providers, GraalHotSpotVMConfig config) {
204 super.initialize(options, factories, runtime, providers, providers.getSnippetReflection());
205
206 assert target == providers.getCodeCache().getTarget();
207 instanceofSnippets = new InstanceOfSnippets.Templates(options, factories, runtime, providers, target);
208 newObjectSnippets = new NewObjectSnippets.Templates(options, factories, runtime, providers, target, config);
209 monitorSnippets = new MonitorSnippets.Templates(options, factories, runtime, providers, target, config.useFastLocking);
210 writeBarrierSnippets = new WriteBarrierSnippets.Templates(options, factories, runtime, providers, target, config.useCompressedOops ? config.getOopEncoding() : null);
211 exceptionObjectSnippets = new LoadExceptionObjectSnippets.Templates(options, factories, providers, target);
212 unsafeLoadSnippets = new UnsafeLoadSnippets.Templates(options, factories, providers, target);
213 assertionSnippets = new AssertionSnippets.Templates(options, factories, providers, target);
214 arraycopySnippets = new ArrayCopySnippets.Templates(options, factories, runtime, providers, target);
215 stringToBytesSnippets = new StringToBytesSnippets.Templates(options, factories, providers, target);
216 hashCodeSnippets = new HashCodeSnippets.Templates(options, factories, providers, target);
217 if (GeneratePIC.getValue(options)) {
218 resolveConstantSnippets = new ResolveConstantSnippets.Templates(options, factories, providers, target);
219 profileSnippets = new ProfileSnippets.Templates(options, factories, providers, target);
220 }
221 providers.getReplacements().registerSnippetTemplateCache(new UnsafeArrayCopySnippets.Templates(options, factories, providers, target));
222 }
223
224 public MonitorSnippets.Templates getMonitorSnippets() {
225 return monitorSnippets;
226 }
227
228 @Override
229 public void lower(Node n, LoweringTool tool) {
230 StructuredGraph graph = (StructuredGraph) n.graph();
231 if (n instanceof Invoke) {
232 lowerInvoke((Invoke) n, tool, graph);
233 } else if (n instanceof LoadMethodNode) {
234 lowerLoadMethodNode((LoadMethodNode) n);
235 } else if (n instanceof GetClassNode) {
236 lowerGetClassNode((GetClassNode) n, tool, graph);
237 } else if (n instanceof StoreHubNode) {
238 lowerStoreHubNode((StoreHubNode) n, graph);
239 } else if (n instanceof OSRStartNode) {
240 lowerOSRStartNode((OSRStartNode) n);
241 } else if (n instanceof BytecodeExceptionNode) {
242 lowerBytecodeExceptionNode((BytecodeExceptionNode) n);
243 } else if (n instanceof InstanceOfNode) {
244 InstanceOfNode instanceOfNode = (InstanceOfNode) n;
245 if (graph.getGuardsStage().areDeoptsFixed()) {
246 instanceofSnippets.lower(instanceOfNode, tool);
247 } else {
248 if (instanceOfNode.allowsNull()) {
249 ValueNode object = instanceOfNode.getValue();
250 LogicNode newTypeCheck = graph.addOrUniqueWithInputs(InstanceOfNode.create(instanceOfNode.type(), object, instanceOfNode.profile(), instanceOfNode.getAnchor()));
251 LogicNode newNode = LogicNode.or(graph.unique(IsNullNode.create(object)), newTypeCheck, GraalDirectives.UNLIKELY_PROBABILITY);
252 instanceOfNode.replaceAndDelete(newNode);
253 }
254 }
255 } else if (n instanceof InstanceOfDynamicNode) {
256 InstanceOfDynamicNode instanceOfDynamicNode = (InstanceOfDynamicNode) n;
257 if (graph.getGuardsStage().areDeoptsFixed()) {
258 instanceofSnippets.lower(instanceOfDynamicNode, tool);
259 } else {
260 ValueNode mirror = instanceOfDynamicNode.getMirrorOrHub();
261 if (mirror.stamp().getStackKind() == JavaKind.Object) {
262 ClassGetHubNode classGetHub = graph.unique(new ClassGetHubNode(mirror));
263 instanceOfDynamicNode.setMirror(classGetHub);
264 }
265
266 if (instanceOfDynamicNode.allowsNull()) {
267 ValueNode object = instanceOfDynamicNode.getObject();
268 LogicNode newTypeCheck = graph.addOrUniqueWithInputs(
269 InstanceOfDynamicNode.create(graph.getAssumptions(), tool.getConstantReflection(), instanceOfDynamicNode.getMirrorOrHub(), object, false));
270 LogicNode newNode = LogicNode.or(graph.unique(IsNullNode.create(object)), newTypeCheck, GraalDirectives.UNLIKELY_PROBABILITY);
271 instanceOfDynamicNode.replaceAndDelete(newNode);
272 }
273 }
274 } else if (n instanceof ClassIsAssignableFromNode) {
275 if (graph.getGuardsStage().areDeoptsFixed()) {
276 instanceofSnippets.lower((ClassIsAssignableFromNode) n, tool);
277 }
278 } else if (n instanceof NewInstanceNode) {
279 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
280 newObjectSnippets.lower((NewInstanceNode) n, registers, tool);
281 }
282 } else if (n instanceof DynamicNewInstanceNode) {
283 DynamicNewInstanceNode newInstanceNode = (DynamicNewInstanceNode) n;
284 if (newInstanceNode.getClassClass() == null) {
285 JavaConstant classClassMirror = constantReflection.forObject(Class.class);
286 ConstantNode classClass = ConstantNode.forConstant(classClassMirror, tool.getMetaAccess(), graph);
287 newInstanceNode.setClassClass(classClass);
288 }
289 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
290 newObjectSnippets.lower(newInstanceNode, registers, tool);
291 }
292 } else if (n instanceof NewArrayNode) {
293 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
294 newObjectSnippets.lower((NewArrayNode) n, registers, tool);
295 }
296 } else if (n instanceof DynamicNewArrayNode) {
297 DynamicNewArrayNode dynamicNewArrayNode = (DynamicNewArrayNode) n;
298 if (dynamicNewArrayNode.getVoidClass() == null) {
299 JavaConstant voidClassMirror = constantReflection.forObject(void.class);
300 ConstantNode voidClass = ConstantNode.forConstant(voidClassMirror, tool.getMetaAccess(), graph);
301 dynamicNewArrayNode.setVoidClass(voidClass);
302 }
303 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
304 newObjectSnippets.lower(dynamicNewArrayNode, registers, tool);
305 }
306 } else if (n instanceof VerifyHeapNode) {
307 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
308 newObjectSnippets.lower((VerifyHeapNode) n, registers, tool);
309 }
310 } else if (n instanceof RawMonitorEnterNode) {
311 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
312 monitorSnippets.lower((RawMonitorEnterNode) n, registers, tool);
313 }
314 } else if (n instanceof MonitorExitNode) {
315 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
316 monitorSnippets.lower((MonitorExitNode) n, registers, tool);
317 }
318 } else if (n instanceof ArrayCopyNode) {
319 arraycopySnippets.lower((ArrayCopyNode) n, tool);
320 } else if (n instanceof ArrayCopySlowPathNode) {
321 arraycopySnippets.lower((ArrayCopySlowPathNode) n, tool);
322 } else if (n instanceof ArrayCopyUnrollNode) {
323 arraycopySnippets.lower((ArrayCopyUnrollNode) n, tool);
324 } else if (n instanceof G1PreWriteBarrier) {
325 writeBarrierSnippets.lower((G1PreWriteBarrier) n, registers, tool);
326 } else if (n instanceof G1PostWriteBarrier) {
327 writeBarrierSnippets.lower((G1PostWriteBarrier) n, registers, tool);
328 } else if (n instanceof G1ReferentFieldReadBarrier) {
329 writeBarrierSnippets.lower((G1ReferentFieldReadBarrier) n, registers, tool);
330 } else if (n instanceof SerialWriteBarrier) {
331 writeBarrierSnippets.lower((SerialWriteBarrier) n, tool);
332 } else if (n instanceof SerialArrayRangeWriteBarrier) {
333 writeBarrierSnippets.lower((SerialArrayRangeWriteBarrier) n, tool);
334 } else if (n instanceof G1ArrayRangePreWriteBarrier) {
335 writeBarrierSnippets.lower((G1ArrayRangePreWriteBarrier) n, registers, tool);
336 } else if (n instanceof G1ArrayRangePostWriteBarrier) {
337 writeBarrierSnippets.lower((G1ArrayRangePostWriteBarrier) n, registers, tool);
338 } else if (n instanceof NewMultiArrayNode) {
339 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
340 newObjectSnippets.lower((NewMultiArrayNode) n, tool);
341 }
342 } else if (n instanceof LoadExceptionObjectNode) {
343 exceptionObjectSnippets.lower((LoadExceptionObjectNode) n, registers, tool);
344 } else if (n instanceof AssertionNode) {
345 assertionSnippets.lower((AssertionNode) n, tool);
346 } else if (n instanceof StringToBytesNode) {
347 if (graph.getGuardsStage().areDeoptsFixed()) {
348 stringToBytesSnippets.lower((StringToBytesNode) n, tool);
349 }
350 } else if (n instanceof IntegerDivRemNode) {
351 // Nothing to do for division nodes. The HotSpot signal handler catches divisions by
352 // zero and the MIN_VALUE / -1 cases.
353 } else if (n instanceof AbstractDeoptimizeNode || n instanceof UnwindNode || n instanceof RemNode || n instanceof SafepointNode) {
354 /* No lowering, we generate LIR directly for these nodes. */
355 } else if (n instanceof ClassGetHubNode) {
356 lowerClassGetHubNode((ClassGetHubNode) n, tool);
357 } else if (n instanceof HubGetClassNode) {
358 lowerHubGetClassNode((HubGetClassNode) n, tool);
359 } else if (n instanceof KlassLayoutHelperNode) {
360 lowerKlassLayoutHelperNode((KlassLayoutHelperNode) n, tool);
361 } else if (n instanceof ComputeObjectAddressNode) {
362 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
363 lowerComputeObjectAddressNode((ComputeObjectAddressNode) n);
364 }
365 } else if (n instanceof IdentityHashCodeNode) {
366 hashCodeSnippets.lower((IdentityHashCodeNode) n, tool);
367 } else if (n instanceof ResolveConstantNode) {
368 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
369 resolveConstantSnippets.lower((ResolveConstantNode) n, tool);
370 }
371 } else if (n instanceof ResolveMethodAndLoadCountersNode) {
372 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
373 resolveConstantSnippets.lower((ResolveMethodAndLoadCountersNode) n, tool);
374 }
375 } else if (n instanceof InitializeKlassNode) {
376 if (graph.getGuardsStage().areFrameStatesAtDeopts()) {
377 resolveConstantSnippets.lower((InitializeKlassNode) n, tool);
378 }
379 } else if (n instanceof ProfileNode) {
380 profileSnippets.lower((ProfileNode) n, tool);
381 } else {
382 super.lower(n, tool);
383 }
384 }
385
386 private static void lowerComputeObjectAddressNode(ComputeObjectAddressNode n) {
387 /*
388 * Lower the node into a ComputeObjectAddress node and an Add but ensure that it's below any
389 * potential safepoints and above it's uses.
390 */
391 for (Node use : n.usages().snapshot()) {
392 if (use instanceof FixedNode) {
393 FixedNode fixed = (FixedNode) use;
394 StructuredGraph graph = n.graph();
395 GetObjectAddressNode address = graph.add(new GetObjectAddressNode(n.getObject()));
396 graph.addBeforeFixed(fixed, address);
397 AddNode add = graph.addOrUnique(new AddNode(address, n.getOffset()));
398 use.replaceFirstInput(n, add);
399 } else {
400 throw GraalError.shouldNotReachHere("Unexpected floating use of ComputeObjectAddressNode " + n);
401 }
402 }
403 GraphUtil.unlinkFixedNode(n);
404 n.safeDelete();
405 }
406
407 private void lowerKlassLayoutHelperNode(KlassLayoutHelperNode n, LoweringTool tool) {
408 if (tool.getLoweringStage() == LoweringTool.StandardLoweringStage.HIGH_TIER) {
409 return;
410 }
411 StructuredGraph graph = n.graph();
412 assert !n.getHub().isConstant();
413 AddressNode address = createOffsetAddress(graph, n.getHub(), runtime.getVMConfig().klassLayoutHelperOffset);
414 n.replaceAtUsagesAndDelete(graph.unique(new FloatingReadNode(address, KLASS_LAYOUT_HELPER_LOCATION, null, n.stamp(), null, BarrierType.NONE)));
415 }
416
417 private void lowerHubGetClassNode(HubGetClassNode n, LoweringTool tool) {
418 if (tool.getLoweringStage() == LoweringTool.StandardLoweringStage.HIGH_TIER) {
419 return;
420 }
421
422 ValueNode hub = n.getHub();
423 GraalHotSpotVMConfig vmConfig = runtime.getVMConfig();
424 StructuredGraph graph = n.graph();
425 assert !hub.isConstant() || GraalOptions.ImmutableCode.getValue(graph.getOptions());
426 AddressNode mirrorAddress = createOffsetAddress(graph, hub, vmConfig.classMirrorOffset);
427 FloatingReadNode read = graph.unique(new FloatingReadNode(mirrorAddress, CLASS_MIRROR_LOCATION, null, vmConfig.classMirrorIsHandle ? StampFactory.forKind(target.wordJavaKind) : n.stamp(),
428 null, BarrierType.NONE));
429 if (vmConfig.classMirrorIsHandle) {
430 AddressNode address = createOffsetAddress(graph, read, 0);
431 read = graph.unique(new FloatingReadNode(address, CLASS_MIRROR_HANDLE_LOCATION, null, n.stamp(), null, BarrierType.NONE));
432 }
433 n.replaceAtUsagesAndDelete(read);
434 }
435
436 private void lowerClassGetHubNode(ClassGetHubNode n, LoweringTool tool) {
437 if (tool.getLoweringStage() == LoweringTool.StandardLoweringStage.HIGH_TIER) {
438 return;
439 }
440
441 StructuredGraph graph = n.graph();
442 assert !n.getValue().isConstant();
443 AddressNode address = createOffsetAddress(graph, n.getValue(), runtime.getVMConfig().klassOffset);
444 FloatingReadNode read = graph.unique(new FloatingReadNode(address, CLASS_KLASS_LOCATION, null, n.stamp(), null, BarrierType.NONE));
445 n.replaceAtUsagesAndDelete(read);
446 }
447
448 private void lowerInvoke(Invoke invoke, LoweringTool tool, StructuredGraph graph) {
449 if (invoke.callTarget() instanceof MethodCallTargetNode) {
450 MethodCallTargetNode callTarget = (MethodCallTargetNode) invoke.callTarget();
451 NodeInputList<ValueNode> parameters = callTarget.arguments();
452 ValueNode receiver = parameters.size() <= 0 ? null : parameters.get(0);
453 if (!callTarget.isStatic() && receiver.stamp() instanceof ObjectStamp && !StampTool.isPointerNonNull(receiver)) {
454 ValueNode nonNullReceiver = createNullCheckedValue(receiver, invoke.asNode(), tool);
455 parameters.set(0, nonNullReceiver);
456 receiver = nonNullReceiver;
457 }
458 JavaType[] signature = callTarget.targetMethod().getSignature().toParameterTypes(callTarget.isStatic() ? null : callTarget.targetMethod().getDeclaringClass());
459
460 LoweredCallTargetNode loweredCallTarget = null;
461 OptionValues options = graph.getOptions();
462 if (InlineVTableStubs.getValue(options) && callTarget.invokeKind().isIndirect() && (AlwaysInlineVTableStubs.getValue(options) || invoke.isPolymorphic())) {
463 HotSpotResolvedJavaMethod hsMethod = (HotSpotResolvedJavaMethod) callTarget.targetMethod();
464 ResolvedJavaType receiverType = invoke.getReceiverType();
465 if (hsMethod.isInVirtualMethodTable(receiverType)) {
466 JavaKind wordKind = runtime.getTarget().wordJavaKind;
467 ValueNode hub = createReadHub(graph, receiver, tool);
468
469 ReadNode metaspaceMethod = createReadVirtualMethod(graph, hub, hsMethod, receiverType);
470 // We use LocationNode.ANY_LOCATION for the reads that access the
471 // compiled code entry as HotSpot does not guarantee they are final
472 // values.
473 int methodCompiledEntryOffset = runtime.getVMConfig().methodCompiledEntryOffset;
474 AddressNode address = createOffsetAddress(graph, metaspaceMethod, methodCompiledEntryOffset);
475 ReadNode compiledEntry = graph.add(new ReadNode(address, any(), StampFactory.forKind(wordKind), BarrierType.NONE));
476
477 loweredCallTarget = graph.add(new HotSpotIndirectCallTargetNode(metaspaceMethod, compiledEntry, parameters.toArray(new ValueNode[parameters.size()]), callTarget.returnStamp(),
478 signature, callTarget.targetMethod(),
479 HotSpotCallingConventionType.JavaCall, callTarget.invokeKind()));
480
481 graph.addBeforeFixed(invoke.asNode(), metaspaceMethod);
482 graph.addAfterFixed(metaspaceMethod, compiledEntry);
483 }
484 }
485
486 if (loweredCallTarget == null) {
487 loweredCallTarget = graph.add(new HotSpotDirectCallTargetNode(parameters.toArray(new ValueNode[parameters.size()]), callTarget.returnStamp(),
488 signature, callTarget.targetMethod(),
489 HotSpotCallingConventionType.JavaCall,
490 callTarget.invokeKind()));
491 }
492 callTarget.replaceAndDelete(loweredCallTarget);
493 }
494 }
495
496 @Override
497 protected Stamp loadStamp(Stamp stamp, JavaKind kind, boolean compressible) {
498 if (kind == JavaKind.Object && compressible && runtime.getVMConfig().useCompressedOops) {
499 return HotSpotNarrowOopStamp.compressed((ObjectStamp) stamp, runtime.getVMConfig().getOopEncoding());
500 }
501 return super.loadStamp(stamp, kind, compressible);
502 }
503
504 @Override
505 protected ValueNode implicitLoadConvert(JavaKind kind, ValueNode value, boolean compressible) {
506 if (kind == JavaKind.Object && compressible && runtime.getVMConfig().useCompressedOops) {
507 return new HotSpotCompressionNode(CompressionOp.Uncompress, value, runtime.getVMConfig().getOopEncoding());
508 }
509 return super.implicitLoadConvert(kind, value, compressible);
510 }
511
512 @Override
513 public ValueNode staticFieldBase(StructuredGraph graph, ResolvedJavaField f) {
514 HotSpotResolvedJavaField field = (HotSpotResolvedJavaField) f;
515 JavaConstant base = constantReflection.asJavaClass(field.getDeclaringClass());
516 return ConstantNode.forConstant(base, metaAccess, graph);
517 }
518
519 @Override
520 protected ValueNode implicitStoreConvert(JavaKind kind, ValueNode value, boolean compressible) {
521 if (kind == JavaKind.Object && compressible && runtime.getVMConfig().useCompressedOops) {
522 return new HotSpotCompressionNode(CompressionOp.Compress, value, runtime.getVMConfig().getOopEncoding());
523 }
524 return super.implicitStoreConvert(kind, value, compressible);
525 }
526
527 @Override
528 protected ValueNode createReadArrayComponentHub(StructuredGraph graph, ValueNode arrayHub, FixedNode anchor) {
529 /*
530 * Anchor the read of the element klass to the cfg, because it is only valid when arrayClass
531 * is an object class, which might not be the case in other parts of the compiled method.
532 */
533 AddressNode address = createOffsetAddress(graph, arrayHub, runtime.getVMConfig().arrayClassElementOffset);
534 return graph.unique(new FloatingReadNode(address, OBJ_ARRAY_KLASS_ELEMENT_KLASS_LOCATION, null, KlassPointerStamp.klassNonNull(), AbstractBeginNode.prevBegin(anchor)));
535 }
536
537 @Override
538 protected void lowerUnsafeLoadNode(RawLoadNode load, LoweringTool tool) {
539 StructuredGraph graph = load.graph();
540 if (!(load instanceof GuardedUnsafeLoadNode) && !graph.getGuardsStage().allowsFloatingGuards() && addReadBarrier(load)) {
541 unsafeLoadSnippets.lower(load, tool);
542 } else {
543 super.lowerUnsafeLoadNode(load, tool);
544 }
545 }
546
547 private void lowerLoadMethodNode(LoadMethodNode loadMethodNode) {
548 StructuredGraph graph = loadMethodNode.graph();
549 HotSpotResolvedJavaMethod method = (HotSpotResolvedJavaMethod) loadMethodNode.getMethod();
550 ReadNode metaspaceMethod = createReadVirtualMethod(graph, loadMethodNode.getHub(), method, loadMethodNode.getReceiverType());
551 graph.replaceFixed(loadMethodNode, metaspaceMethod);
552 }
553
554 private static void lowerGetClassNode(GetClassNode getClass, LoweringTool tool, StructuredGraph graph) {
555 StampProvider stampProvider = tool.getStampProvider();
556 LoadHubNode hub = graph.unique(new LoadHubNode(stampProvider, getClass.getObject()));
557 HubGetClassNode hubGetClass = graph.unique(new HubGetClassNode(tool.getMetaAccess(), hub));
558 getClass.replaceAtUsagesAndDelete(hubGetClass);
559 hub.lower(tool);
560 hubGetClass.lower(tool);
561 }
562
563 private void lowerStoreHubNode(StoreHubNode storeHub, StructuredGraph graph) {
564 WriteNode hub = createWriteHub(graph, storeHub.getObject(), storeHub.getValue());
565 graph.replaceFixed(storeHub, hub);
566 }
567
568 @Override
569 public BarrierType fieldInitializationBarrier(JavaKind entryKind) {
570 return (entryKind == JavaKind.Object && !runtime.getVMConfig().useDeferredInitBarriers) ? BarrierType.IMPRECISE : BarrierType.NONE;
571 }
572
573 @Override
574 public BarrierType arrayInitializationBarrier(JavaKind entryKind) {
575 return (entryKind == JavaKind.Object && !runtime.getVMConfig().useDeferredInitBarriers) ? BarrierType.PRECISE : BarrierType.NONE;
576 }
577
578 private void lowerOSRStartNode(OSRStartNode osrStart) {
579 StructuredGraph graph = osrStart.graph();
580 if (graph.getGuardsStage() == StructuredGraph.GuardsStage.FIXED_DEOPTS) {
581 StartNode newStart = graph.add(new StartNode());
582 ParameterNode buffer = graph.addWithoutUnique(new ParameterNode(0, StampPair.createSingle(StampFactory.forKind(runtime.getTarget().wordJavaKind))));
583 ForeignCallNode migrationEnd = graph.add(new ForeignCallNode(foreignCalls, OSR_MIGRATION_END, buffer));
584 migrationEnd.setStateAfter(osrStart.stateAfter());
585 newStart.setNext(migrationEnd);
586 FixedNode next = osrStart.next();
587 osrStart.setNext(null);
588 migrationEnd.setNext(next);
589 graph.setStart(newStart);
590
591 final int wordSize = target.wordSize;
592
593 // @formatter:off
594 // taken from c2 locals_addr = osr_buf + (max_locals-1)*wordSize)
595 // @formatter:on
596 int localsOffset = (graph.method().getMaxLocals() - 1) * wordSize;
597 for (OSRLocalNode osrLocal : graph.getNodes(OSRLocalNode.TYPE)) {
598 int size = osrLocal.getStackKind().getSlotCount();
599 int offset = localsOffset - (osrLocal.index() + size - 1) * wordSize;
600 AddressNode address = createOffsetAddress(graph, buffer, offset);
601 ReadNode load = graph.add(new ReadNode(address, any(), osrLocal.stamp(), BarrierType.NONE));
602 osrLocal.replaceAndDelete(load);
603 graph.addBeforeFixed(migrationEnd, load);
604 }
605
606 // @formatter:off
607 // taken from c2 monitors_addr = osr_buf + (max_locals+mcnt*2-1)*wordSize);
608 // @formatter:on
609 final int lockCount = osrStart.stateAfter().locksSize();
610 final int locksOffset = (graph.method().getMaxLocals() + lockCount * 2 - 1) * wordSize;
611
612 // first initialize the lock slots for all enters with the displaced marks read from the
613 // buffer
614 for (OSRMonitorEnterNode osrMonitorEnter : graph.getNodes(OSRMonitorEnterNode.TYPE)) {
615 MonitorIdNode monitorID = osrMonitorEnter.getMonitorId();
616 OSRLockNode lock = (OSRLockNode) osrMonitorEnter.object();
617 final int index = lock.index();
618
619 final int offsetDisplacedHeader = locksOffset - ((index * 2) + 1) * wordSize;
620 final int offsetLockObject = locksOffset - index * 2 * wordSize;
621
622 // load the displaced mark from the osr buffer
623 AddressNode addressDisplacedHeader = createOffsetAddress(graph, buffer, offsetDisplacedHeader);
624 ReadNode loadDisplacedHeader = graph.add(new ReadNode(addressDisplacedHeader, any(), lock.stamp(), BarrierType.NONE));
625 graph.addBeforeFixed(migrationEnd, loadDisplacedHeader);
626
627 // we need to initialize the stack slot for the lock
628 BeginLockScopeNode beginLockScope = graph.add(new BeginLockScopeNode(lock.getStackKind(), monitorID.getLockDepth()));
629 graph.addBeforeFixed(migrationEnd, beginLockScope);
630
631 // write the displaced mark to the correct stack slot
632 AddressNode addressDisplacedMark = createOffsetAddress(graph, beginLockScope, runtime.getVMConfig().basicLockDisplacedHeaderOffset);
633 WriteNode writeStackSlot = graph.add(new WriteNode(addressDisplacedMark, DISPLACED_MARK_WORD_LOCATION, loadDisplacedHeader, BarrierType.NONE));
634 graph.addBeforeFixed(migrationEnd, writeStackSlot);
635
636 // load the lock object from the osr buffer
637 AddressNode addressLockObject = createOffsetAddress(graph, buffer, offsetLockObject);
638 ReadNode loadObject = graph.add(new ReadNode(addressLockObject, any(), lock.stamp(), BarrierType.NONE));
639 lock.replaceAndDelete(loadObject);
640 graph.addBeforeFixed(migrationEnd, loadObject);
641 }
642
643 osrStart.replaceAtUsagesAndDelete(newStart);
644 }
645 }
646
647 static final class Exceptions {
648 protected static final ArrayIndexOutOfBoundsException cachedArrayIndexOutOfBoundsException;
649 protected static final NullPointerException cachedNullPointerException;
650
651 static {
652 cachedArrayIndexOutOfBoundsException = new ArrayIndexOutOfBoundsException();
653 cachedArrayIndexOutOfBoundsException.setStackTrace(new StackTraceElement[0]);
654 cachedNullPointerException = new NullPointerException();
655 cachedNullPointerException.setStackTrace(new StackTraceElement[0]);
656 }
657 }
658
659 public static final class RuntimeCalls {
660 public static final ForeignCallDescriptor CREATE_ARRAY_STORE_EXCEPTION = new ForeignCallDescriptor("createArrayStoreException", ArrayStoreException.class, Object.class);
661 public static final ForeignCallDescriptor CREATE_CLASS_CAST_EXCEPTION = new ForeignCallDescriptor("createClassCastException", ClassCastException.class, Object.class, KlassPointer.class);
662 public static final ForeignCallDescriptor CREATE_NULL_POINTER_EXCEPTION = new ForeignCallDescriptor("createNullPointerException", NullPointerException.class);
663 public static final ForeignCallDescriptor CREATE_OUT_OF_BOUNDS_EXCEPTION = new ForeignCallDescriptor("createOutOfBoundsException", ArrayIndexOutOfBoundsException.class, int.class);
664 }
665
666 private boolean throwCachedException(BytecodeExceptionNode node) {
667 Throwable exception;
668 if (node.getExceptionClass() == NullPointerException.class) {
669 exception = Exceptions.cachedNullPointerException;
670 } else if (node.getExceptionClass() == ArrayIndexOutOfBoundsException.class) {
671 exception = Exceptions.cachedArrayIndexOutOfBoundsException;
672 } else {
673 return false;
674 }
675
676 StructuredGraph graph = node.graph();
677 FloatingNode exceptionNode = ConstantNode.forConstant(constantReflection.forObject(exception), metaAccess, graph);
678 graph.replaceFixedWithFloating(node, exceptionNode);
679 return true;
680 }
681
682 private void lowerBytecodeExceptionNode(BytecodeExceptionNode node) {
683 if (OmitHotExceptionStacktrace.getValue(node.getOptions())) {
684 if (throwCachedException(node)) {
685 return;
686 }
687 }
688
689 ForeignCallDescriptor descriptor;
690 if (node.getExceptionClass() == NullPointerException.class) {
691 descriptor = RuntimeCalls.CREATE_NULL_POINTER_EXCEPTION;
692 } else if (node.getExceptionClass() == ArrayIndexOutOfBoundsException.class) {
693 descriptor = RuntimeCalls.CREATE_OUT_OF_BOUNDS_EXCEPTION;
694 } else if (node.getExceptionClass() == ArrayStoreException.class) {
695 descriptor = RuntimeCalls.CREATE_ARRAY_STORE_EXCEPTION;
696 } else if (node.getExceptionClass() == ClassCastException.class) {
697 descriptor = RuntimeCalls.CREATE_CLASS_CAST_EXCEPTION;
698 } else {
699 throw GraalError.shouldNotReachHere();
700 }
701
702 StructuredGraph graph = node.graph();
703 ForeignCallNode foreignCallNode = graph.add(new ForeignCallNode(foreignCalls, descriptor, node.stamp(), node.getArguments()));
704 graph.replaceFixedWithFixed(node, foreignCallNode);
705 }
706
707 private boolean addReadBarrier(RawLoadNode load) {
708 if (runtime.getVMConfig().useG1GC && load.graph().getGuardsStage() == StructuredGraph.GuardsStage.FIXED_DEOPTS && load.object().getStackKind() == JavaKind.Object &&
709 load.accessKind() == JavaKind.Object && !StampTool.isPointerAlwaysNull(load.object())) {
710 ResolvedJavaType type = StampTool.typeOrNull(load.object());
711 if (type != null && !type.isArray()) {
712 return true;
713 }
714 }
715 return false;
716 }
717
718 private ReadNode createReadVirtualMethod(StructuredGraph graph, ValueNode hub, HotSpotResolvedJavaMethod method, ResolvedJavaType receiverType) {
719 return createReadVirtualMethod(graph, hub, method.vtableEntryOffset(receiverType));
720 }
721
722 private ReadNode createReadVirtualMethod(StructuredGraph graph, ValueNode hub, int vtableEntryOffset) {
723 assert vtableEntryOffset > 0;
724 // We use LocationNode.ANY_LOCATION for the reads that access the vtable
725 // entry as HotSpot does not guarantee that this is a final value.
726 Stamp methodStamp = MethodPointerStamp.methodNonNull();
727 AddressNode address = createOffsetAddress(graph, hub, vtableEntryOffset);
728 ReadNode metaspaceMethod = graph.add(new ReadNode(address, any(), methodStamp, BarrierType.NONE));
729 return metaspaceMethod;
730 }
731
732 @Override
733 protected ValueNode createReadHub(StructuredGraph graph, ValueNode object, LoweringTool tool) {
734 if (tool.getLoweringStage() != LoweringTool.StandardLoweringStage.LOW_TIER) {
735 return graph.unique(new LoadHubNode(tool.getStampProvider(), object));
736 }
737 assert !object.isConstant() || object.isNullConstant();
738
739 KlassPointerStamp hubStamp = KlassPointerStamp.klassNonNull();
740 if (runtime.getVMConfig().useCompressedClassPointers) {
741 hubStamp = hubStamp.compressed(runtime.getVMConfig().getKlassEncoding());
742 }
743
744 AddressNode address = createOffsetAddress(graph, object, runtime.getVMConfig().hubOffset);
745 LocationIdentity hubLocation = runtime.getVMConfig().useCompressedClassPointers ? COMPRESSED_HUB_LOCATION : HUB_LOCATION;
746 FloatingReadNode memoryRead = graph.unique(new FloatingReadNode(address, hubLocation, null, hubStamp, null, BarrierType.NONE));
747 if (runtime.getVMConfig().useCompressedClassPointers) {
748 return HotSpotCompressionNode.uncompress(memoryRead, runtime.getVMConfig().getKlassEncoding());
749 } else {
750 return memoryRead;
751 }
752 }
753
754 private WriteNode createWriteHub(StructuredGraph graph, ValueNode object, ValueNode value) {
755 assert !object.isConstant() || object.asConstant().isDefaultForKind();
756
757 ValueNode writeValue = value;
758 if (runtime.getVMConfig().useCompressedClassPointers) {
759 writeValue = HotSpotCompressionNode.compress(value, runtime.getVMConfig().getKlassEncoding());
760 }
761
762 AddressNode address = createOffsetAddress(graph, object, runtime.getVMConfig().hubOffset);
763 return graph.add(new WriteNode(address, HUB_WRITE_LOCATION, writeValue, BarrierType.NONE));
764 }
765
766 @Override
767 protected BarrierType fieldLoadBarrierType(ResolvedJavaField f) {
768 HotSpotResolvedJavaField loadField = (HotSpotResolvedJavaField) f;
769 BarrierType barrierType = BarrierType.NONE;
770 if (runtime.getVMConfig().useG1GC && loadField.getJavaKind() == JavaKind.Object && metaAccess.lookupJavaType(Reference.class).equals(loadField.getDeclaringClass()) &&
771 loadField.getName().equals("referent")) {
772 barrierType = BarrierType.PRECISE;
773 }
774 return barrierType;
775 }
776
777 @Override
778 public int fieldOffset(ResolvedJavaField f) {
779 HotSpotResolvedJavaField field = (HotSpotResolvedJavaField) f;
780 return field.offset();
781 }
782
783 @Override
784 public int arrayScalingFactor(JavaKind kind) {
785 if (runtime.getVMConfig().useCompressedOops && kind == JavaKind.Object) {
786 return super.arrayScalingFactor(JavaKind.Int);
787 } else {
788 return super.arrayScalingFactor(kind);
789 }
790 }
791
792 @Override
793 public int arrayBaseOffset(JavaKind kind) {
794 return getArrayBaseOffset(kind);
795 }
796
797 @Override
798 public int arrayLengthOffset() {
799 return runtime.getVMConfig().arrayOopDescLengthOffset();
800 }
801 }