Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/CheckCastDynamicNode.java @ 23394:964f28c04d7b default tip
Don't fill the code cache with nmethods from CTW
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Fri, 05 Feb 2016 22:48:36 -0800 |
parents | 615f3bbbb174 |
children |
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/* * Copyright (c) 2009, 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.java; import jdk.vm.ci.meta.ResolvedJavaType; import com.oracle.graal.graph.NodeClass; import com.oracle.graal.graph.spi.Canonicalizable; import com.oracle.graal.graph.spi.CanonicalizerTool; import com.oracle.graal.nodeinfo.NodeInfo; import com.oracle.graal.nodes.FixedWithNextNode; import com.oracle.graal.nodes.ValueNode; import com.oracle.graal.nodes.spi.Lowerable; import com.oracle.graal.nodes.spi.LoweringTool; import com.oracle.graal.nodes.type.StampTool; /** * Implements a type check where the type being checked is loaded at runtime. This is used, for * instance, to implement an object array store check. */ @NodeInfo public final class CheckCastDynamicNode extends FixedWithNextNode implements Canonicalizable.Binary<ValueNode>, Lowerable { public static final NodeClass<CheckCastDynamicNode> TYPE = NodeClass.create(CheckCastDynamicNode.class); @Input ValueNode object; @Input ValueNode hub; /** * Determines the exception thrown by this node if the check fails: {@link ClassCastException} * if false; {@link ArrayStoreException} if true. */ protected final boolean forStoreCheck; public CheckCastDynamicNode(ValueNode hub, ValueNode object, boolean forStoreCheck) { super(TYPE, object.stamp()); this.hub = hub; this.object = object; this.forStoreCheck = forStoreCheck; } public ValueNode object() { return object; } /** * Gets the runtime-loaded type being cast to. */ public ValueNode hub() { return hub; } public ValueNode getX() { return object; } public ValueNode getY() { return hub; } public boolean isForStoreCheck() { return forStoreCheck; } @Override public void lower(LoweringTool tool) { tool.getLowerer().lower(this, tool); } @Override public boolean inferStamp() { return updateStamp(object().stamp()); } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forObject, ValueNode forHub) { if (StampTool.isPointerAlwaysNull(forObject)) { return forObject; } if (forHub.isConstant()) { ResolvedJavaType t = tool.getConstantReflection().asJavaType(forHub.asConstant()); if (t != null) { return new CheckCastNode(t, forObject, null, forStoreCheck); } } return this; } }