--- /dev/null 2016-05-31 09:42:47.975716356 -0700 +++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/meta/HotSpotWordOperationPlugin.java 2016-12-09 00:49:28.632282934 -0800 @@ -0,0 +1,164 @@ +/* + * Copyright (c) 2015, 2016, 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 org.graalvm.compiler.hotspot.meta; + +import static org.graalvm.compiler.core.common.LocationIdentity.any; +import static org.graalvm.compiler.hotspot.word.HotSpotOperation.HotspotOpcode.POINTER_EQ; +import static org.graalvm.compiler.hotspot.word.HotSpotOperation.HotspotOpcode.POINTER_NE; +import static org.graalvm.compiler.nodes.ConstantNode.forBoolean; + +import org.graalvm.compiler.api.replacements.SnippetReflectionProvider; +import org.graalvm.compiler.bytecode.BridgeMethodUtils; +import org.graalvm.compiler.core.common.LocationIdentity; +import org.graalvm.compiler.core.common.type.Stamp; +import org.graalvm.compiler.core.common.type.StampFactory; +import org.graalvm.compiler.debug.GraalError; +import org.graalvm.compiler.hotspot.nodes.LoadIndexedPointerNode; +import org.graalvm.compiler.hotspot.nodes.type.KlassPointerStamp; +import org.graalvm.compiler.hotspot.nodes.type.MetaspacePointerStamp; +import org.graalvm.compiler.hotspot.nodes.type.MethodPointerStamp; +import org.graalvm.compiler.hotspot.word.HotSpotOperation; +import org.graalvm.compiler.hotspot.word.HotSpotOperation.HotspotOpcode; +import org.graalvm.compiler.hotspot.word.PointerCastNode; +import org.graalvm.compiler.nodes.AbstractBeginNode; +import org.graalvm.compiler.nodes.LogicNode; +import org.graalvm.compiler.nodes.ValueNode; +import org.graalvm.compiler.nodes.calc.ConditionalNode; +import org.graalvm.compiler.nodes.calc.IsNullNode; +import org.graalvm.compiler.nodes.calc.PointerEqualsNode; +import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext; +import org.graalvm.compiler.nodes.java.LoadIndexedNode; +import org.graalvm.compiler.nodes.memory.HeapAccess.BarrierType; +import org.graalvm.compiler.nodes.memory.ReadNode; +import org.graalvm.compiler.nodes.memory.address.AddressNode; +import org.graalvm.compiler.nodes.type.StampTool; +import org.graalvm.compiler.replacements.WordOperationPlugin; +import org.graalvm.compiler.word.WordTypes; + +import jdk.vm.ci.meta.JavaKind; +import jdk.vm.ci.meta.ResolvedJavaMethod; +import jdk.vm.ci.meta.ResolvedJavaType; + +/** + * Extends {@link WordOperationPlugin} to handle {@linkplain HotSpotOperation HotSpot word + * operations}. + */ +class HotSpotWordOperationPlugin extends WordOperationPlugin { + HotSpotWordOperationPlugin(SnippetReflectionProvider snippetReflection, WordTypes wordTypes) { + super(snippetReflection, wordTypes); + } + + @Override + protected LoadIndexedNode createLoadIndexedNode(ValueNode array, ValueNode index) { + ResolvedJavaType arrayType = StampTool.typeOrNull(array); + Stamp componentStamp = wordTypes.getWordStamp(arrayType.getComponentType()); + if (componentStamp instanceof MetaspacePointerStamp) { + return new LoadIndexedPointerNode(componentStamp, array, index); + } else { + return super.createLoadIndexedNode(array, index); + } + } + + @Override + public boolean handleInvoke(GraphBuilderContext b, ResolvedJavaMethod method, ValueNode[] args) { + if (!wordTypes.isWordOperation(method)) { + return false; + } + + HotSpotOperation operation = BridgeMethodUtils.getAnnotation(HotSpotOperation.class, method); + if (operation == null) { + processWordOperation(b, args, wordTypes.getWordOperation(method, b.getMethod().getDeclaringClass())); + return true; + } + processHotSpotWordOperation(b, method, args, operation); + return true; + } + + protected void processHotSpotWordOperation(GraphBuilderContext b, ResolvedJavaMethod method, ValueNode[] args, HotSpotOperation operation) { + JavaKind returnKind = method.getSignature().getReturnKind(); + switch (operation.opcode()) { + case POINTER_EQ: + case POINTER_NE: + assert args.length == 2; + HotspotOpcode opcode = operation.opcode(); + ValueNode left = args[0]; + ValueNode right = args[1]; + assert left.stamp() instanceof MetaspacePointerStamp : left + " " + left.stamp(); + assert right.stamp() instanceof MetaspacePointerStamp : right + " " + right.stamp(); + assert opcode == POINTER_EQ || opcode == POINTER_NE; + + PointerEqualsNode comparison = b.add(new PointerEqualsNode(left, right)); + ValueNode eqValue = b.add(forBoolean(opcode == POINTER_EQ)); + ValueNode neValue = b.add(forBoolean(opcode == POINTER_NE)); + b.addPush(returnKind, new ConditionalNode(comparison, eqValue, neValue)); + break; + + case IS_NULL: + assert args.length == 1; + ValueNode pointer = args[0]; + assert pointer.stamp() instanceof MetaspacePointerStamp; + + LogicNode isNull = b.add(IsNullNode.create(pointer)); + b.addPush(returnKind, new ConditionalNode(isNull, b.add(forBoolean(true)), b.add(forBoolean(false)))); + break; + + case FROM_POINTER: + assert args.length == 1; + b.addPush(returnKind, new PointerCastNode(StampFactory.forKind(wordKind), args[0])); + break; + + case TO_KLASS_POINTER: + assert args.length == 1; + b.addPush(returnKind, new PointerCastNode(KlassPointerStamp.klass(), args[0])); + break; + + case TO_METHOD_POINTER: + assert args.length == 1; + b.addPush(returnKind, new PointerCastNode(MethodPointerStamp.method(), args[0])); + break; + + case READ_KLASS_POINTER: + assert args.length == 2 || args.length == 3; + Stamp readStamp = KlassPointerStamp.klass(); + AddressNode address = makeAddress(b, args[0], args[1]); + LocationIdentity location; + if (args.length == 2) { + location = any(); + } else { + assert args[2].isConstant(); + location = snippetReflection.asObject(LocationIdentity.class, args[2].asJavaConstant()); + } + ReadNode read = b.add(new ReadNode(address, location, readStamp, BarrierType.NONE)); + /* + * The read must not float outside its block otherwise it may float above an + * explicit zero check on its base address. + */ + read.setGuard(AbstractBeginNode.prevBegin(read)); + b.push(returnKind, read); + break; + + default: + throw GraalError.shouldNotReachHere("unknown operation: " + operation.opcode()); + } + } +}