| /* |
| * Copyright (c) 2014, 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 org.graalvm.compiler.replacements.nodes; |
| |
| import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_UNKNOWN; |
| import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_UNKNOWN; |
| |
| import org.graalvm.compiler.core.common.type.StampFactory; |
| import org.graalvm.compiler.debug.GraalError; |
| import org.graalvm.compiler.graph.Node; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.graph.spi.Canonicalizable; |
| import org.graalvm.compiler.graph.spi.CanonicalizerTool; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.FixedWithNextNode; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.spi.LIRLowerable; |
| import org.graalvm.compiler.nodes.spi.Lowerable; |
| import org.graalvm.compiler.nodes.spi.LoweringTool; |
| import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; |
| |
| /** |
| * Assertion nodes will go away as soon as the value evaluates to true. Compile-time assertions will |
| * fail if this has not happened by the time the node is lowered to LIR, while runtime assertions |
| * may need to insert a check. |
| */ |
| @NodeInfo(cycles = CYCLES_UNKNOWN, size = SIZE_UNKNOWN) |
| public final class AssertionNode extends FixedWithNextNode implements Lowerable, Canonicalizable, LIRLowerable { |
| |
| public static final NodeClass<AssertionNode> TYPE = NodeClass.create(AssertionNode.class); |
| @Input ValueNode value; |
| |
| protected final boolean compileTimeAssertion; |
| protected final String message; |
| |
| public AssertionNode(boolean compileTimeAssertion, ValueNode value, String message) { |
| super(TYPE, StampFactory.forVoid()); |
| this.value = value; |
| this.compileTimeAssertion = compileTimeAssertion; |
| this.message = message; |
| } |
| |
| public ValueNode value() { |
| return value; |
| } |
| |
| public String message() { |
| return message; |
| } |
| |
| @Override |
| public Node canonical(CanonicalizerTool tool) { |
| if (value.isConstant() && value.asJavaConstant().asInt() != 0) { |
| return null; |
| } |
| /* |
| * Assertions with a constant "false" value do not immediately cause an error, since they |
| * may be unreachable and could thus be removed by later optimizations. |
| */ |
| return this; |
| } |
| |
| @Override |
| public void lower(LoweringTool tool) { |
| if (!compileTimeAssertion) { |
| tool.getLowerer().lower(this, tool); |
| } |
| } |
| |
| @Override |
| public void generate(NodeLIRBuilderTool generator) { |
| assert compileTimeAssertion; |
| if (value.isConstant()) { |
| if (value.asJavaConstant().asInt() == 0) { |
| throw new GraalError("%s: failed compile-time assertion: %s", this, message); |
| } |
| } else { |
| throw new GraalError("%s: failed compile-time assertion (value %s): %s", this, value, message); |
| } |
| } |
| |
| @NodeIntrinsic |
| public static native void assertion(@ConstantNodeParameter boolean compileTimeAssertion, boolean value, @ConstantNodeParameter String message); |
| } |