--- /dev/null 2016-05-31 09:42:47.975716356 -0700 +++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/java/ExceptionObjectNode.java 2016-12-09 00:55:46.933958430 -0800 @@ -0,0 +1,88 @@ +/* + * Copyright (c) 2009, 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.nodes.java; + +import static org.graalvm.compiler.nodeinfo.InputType.Memory; +import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_10; +import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_8; + +import org.graalvm.compiler.core.common.LocationIdentity; +import org.graalvm.compiler.core.common.type.StampFactory; +import org.graalvm.compiler.core.common.type.TypeReference; +import org.graalvm.compiler.graph.NodeClass; +import org.graalvm.compiler.nodeinfo.InputType; +import org.graalvm.compiler.nodeinfo.NodeInfo; +import org.graalvm.compiler.nodes.AbstractBeginNode; +import org.graalvm.compiler.nodes.BeginStateSplitNode; +import org.graalvm.compiler.nodes.InvokeWithExceptionNode; +import org.graalvm.compiler.nodes.KillingBeginNode; +import org.graalvm.compiler.nodes.StructuredGraph; +import org.graalvm.compiler.nodes.memory.MemoryCheckpoint; +import org.graalvm.compiler.nodes.spi.Lowerable; +import org.graalvm.compiler.nodes.spi.LoweringTool; + +import jdk.vm.ci.meta.MetaAccessProvider; + +/** + * The entry to an exception handler with the exception coming from a call (as opposed to a local + * throw instruction or implicit exception). + */ +@NodeInfo(allowedUsageTypes = Memory, cycles = CYCLES_10, size = SIZE_8) +public final class ExceptionObjectNode extends BeginStateSplitNode implements Lowerable, MemoryCheckpoint.Single { + public static final NodeClass TYPE = NodeClass.create(ExceptionObjectNode.class); + + public ExceptionObjectNode(MetaAccessProvider metaAccess) { + super(TYPE, StampFactory.objectNonNull(TypeReference.createTrustedWithoutAssumptions(metaAccess.lookupJavaType(Throwable.class)))); + } + + @Override + public LocationIdentity getLocationIdentity() { + return LocationIdentity.any(); + } + + @Override + public void lower(LoweringTool tool) { + if (graph().getGuardsStage() == StructuredGraph.GuardsStage.FIXED_DEOPTS) { + /* + * Now the lowering to BeginNode+LoadExceptionNode can be performed, since no more + * deopts can float in between the begin node and the load exception node. + */ + LocationIdentity locationsKilledByInvoke = ((InvokeWithExceptionNode) predecessor()).getLocationIdentity(); + AbstractBeginNode entry = graph().add(new KillingBeginNode(locationsKilledByInvoke)); + LoadExceptionObjectNode loadException = graph().add(new LoadExceptionObjectNode(stamp())); + + loadException.setStateAfter(stateAfter()); + replaceAtUsages(InputType.Value, loadException); + graph().replaceFixedWithFixed(this, entry); + entry.graph().addAfterFixed(entry, loadException); + + loadException.lower(tool); + } + } + + @Override + public boolean verify() { + assertTrue(stateAfter() != null, "an exception handler needs a frame state"); + return super.verify(); + } +}