Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/TypeProfileProxyNode.java @ 21543:93c50cefb9e8
moved GraalInternalError to com.oracle.jvmci.common and renamed it to JVMCIError (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Mon, 25 May 2015 23:30:34 +0200 |
parents | deab43a789ad |
children | b1530a6cce8c |
line wrap: on
line source
/* * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.nodes; import java.util.*; import com.oracle.graal.api.meta.Assumptions.AssumptionResult; import com.oracle.graal.api.meta.*; import com.oracle.graal.debug.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * A node that attaches a type profile to a proxied input node. */ @NodeInfo public final class TypeProfileProxyNode extends UnaryNode implements IterableNodeType, ValueProxy { public static final NodeClass<TypeProfileProxyNode> TYPE = NodeClass.create(TypeProfileProxyNode.class); protected final JavaTypeProfile profile; protected transient ResolvedJavaType lastCheckedType; protected transient JavaTypeProfile lastCheckedProfile; public static ValueNode proxify(ValueNode object, JavaTypeProfile profile) { if (StampTool.isExactType(object)) { return object; } if (profile == null) { // No profile, so create no node. return object; } if (profile.getTypes().length == 0) { // Only null profiling is not beneficial enough to keep the node around. return object; } return object.graph().addWithoutUnique(new TypeProfileProxyNode(object, profile)); } protected TypeProfileProxyNode(ValueNode value, JavaTypeProfile profile) { super(TYPE, value.stamp(), value); this.profile = profile; } public JavaTypeProfile getProfile() { return profile; } @Override public boolean inferStamp() { return updateStamp(getValue().stamp()); } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) { if (StampTool.isExactType(forValue)) { // The profile is useless - we know the type! return forValue; } else if (forValue instanceof TypeProfileProxyNode) { TypeProfileProxyNode other = (TypeProfileProxyNode) forValue; JavaTypeProfile otherProfile = other.getProfile(); if (otherProfile == lastCheckedProfile) { // We have already incorporated the knowledge about this profile => abort. return this; } lastCheckedProfile = otherProfile; JavaTypeProfile newProfile = this.profile.restrict(otherProfile); if (newProfile.equals(otherProfile)) { // We are useless - just use the other proxy node. Debug.log("Canonicalize with other proxy node."); return forValue; } if (newProfile != this.profile) { Debug.log("Improved profile via other profile."); return new TypeProfileProxyNode(forValue, newProfile); } } else if (StampTool.typeOrNull(forValue) != null) { ResolvedJavaType type = StampTool.typeOrNull(forValue); AssumptionResult<ResolvedJavaType> leafConcreteSubtype = type.findLeafConcreteSubtype(); if (leafConcreteSubtype != null) { // Profile is useless => remove. Debug.log("Profile useless, there is enough static type information available."); return forValue; } if (Objects.equals(type, lastCheckedType)) { // We have already incorporate the knowledge about this type => abort. return this; } lastCheckedType = type; JavaTypeProfile newProfile = this.profile.restrict(type, StampTool.isPointerNonNull(forValue)); if (newProfile != this.profile) { Debug.log("Improved profile via static type information."); if (newProfile.getTypes().length == 0) { // Only null profiling is not beneficial enough to keep the node around. return forValue; } return new TypeProfileProxyNode(forValue, newProfile); } } return this; } @Override public ValueNode getOriginalNode() { return getValue(); } }