1 /* 2 * Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 package org.graalvm.compiler.replacements.nodes; 26 27 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2; 28 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1; 29 30 import org.graalvm.compiler.core.common.type.StampFactory; 31 import org.graalvm.compiler.graph.NodeClass; 32 import org.graalvm.compiler.nodeinfo.NodeInfo; 33 import org.graalvm.compiler.nodeinfo.Verbosity; 34 import org.graalvm.compiler.nodes.FixedWithNextNode; 35 import org.graalvm.compiler.nodes.ValueNode; 36 import org.graalvm.compiler.nodes.spi.LIRLowerable; 37 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 38 39 import jdk.vm.ci.code.Register; 40 import jdk.vm.ci.meta.Value; 41 42 /** 43 * Changes the value of a specific register. 44 */ 45 @NodeInfo(nameTemplate = "WriteRegister %{p#register}", cycles = CYCLES_2, size = SIZE_1) 46 public final class WriteRegisterNode extends FixedWithNextNode implements LIRLowerable { 47 48 public static final NodeClass<WriteRegisterNode> TYPE = NodeClass.create(WriteRegisterNode.class); 49 /** 50 * The fixed register to access. 51 */ 52 protected final Register register; 53 54 /** 55 * The new value assigned to the register. 56 */ 57 @Input ValueNode value; 58 59 public WriteRegisterNode(Register register, ValueNode value) { 60 super(TYPE, StampFactory.forVoid()); 61 this.register = register; 62 this.value = value; 63 } 64 65 @Override 66 public void generate(NodeLIRBuilderTool generator) { 67 Value val = generator.operand(value); 68 generator.getLIRGeneratorTool().emitWriteRegister(register, val, val.getValueKind()); 69 } 70 71 @Override 72 public String toString(Verbosity verbosity) { 73 if (verbosity == Verbosity.Name) { 74 return super.toString(Verbosity.Name) + "%" + register; 75 } else { 76 return super.toString(verbosity); 77 } 78 } 79 }