| /* |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2017, Red Hat Inc. 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.core.aarch64; |
| |
| import jdk.vm.ci.aarch64.AArch64Kind; |
| |
| import org.graalvm.compiler.core.common.type.IntegerStamp; |
| import org.graalvm.compiler.core.common.type.Stamp; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.lir.aarch64.AArch64AddressValue; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.FrameState; |
| import org.graalvm.compiler.nodes.NodeView; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.calc.SignExtendNode; |
| import org.graalvm.compiler.nodes.calc.ZeroExtendNode; |
| import org.graalvm.compiler.nodes.extended.GuardingNode; |
| import org.graalvm.compiler.nodes.memory.ReadNode; |
| import org.graalvm.compiler.nodes.memory.address.AddressNode; |
| import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; |
| import jdk.internal.vm.compiler.word.LocationIdentity; |
| |
| /** |
| * AArch64-specific subclass of ReadNode that knows how to merge ZeroExtend and SignExtend into the |
| * read. |
| */ |
| |
| @NodeInfo |
| public class AArch64ReadNode extends ReadNode { |
| public static final NodeClass<AArch64ReadNode> TYPE = NodeClass.create(AArch64ReadNode.class); |
| private final IntegerStamp accessStamp; |
| private final boolean isSigned; |
| |
| public AArch64ReadNode(AddressNode address, LocationIdentity location, Stamp stamp, GuardingNode guard, BarrierType barrierType, boolean nullCheck, |
| FrameState stateBefore, IntegerStamp accessStamp, boolean isSigned) { |
| super(TYPE, address, location, stamp, guard, barrierType, nullCheck, stateBefore); |
| this.accessStamp = accessStamp; |
| this.isSigned = isSigned; |
| } |
| |
| @Override |
| public void generate(NodeLIRBuilderTool gen) { |
| AArch64LIRGenerator lirgen = (AArch64LIRGenerator) gen.getLIRGeneratorTool(); |
| AArch64ArithmeticLIRGenerator arithgen = (AArch64ArithmeticLIRGenerator) lirgen.getArithmetic(); |
| AArch64Kind readKind = (AArch64Kind) lirgen.getLIRKind(accessStamp).getPlatformKind(); |
| int resultBits = ((IntegerStamp) stamp(NodeView.DEFAULT)).getBits(); |
| gen.setResult(this, arithgen.emitExtendMemory(isSigned, readKind, resultBits, (AArch64AddressValue) gen.operand(getAddress()), gen.state(this))); |
| } |
| |
| /** |
| * replace a ReadNode with an AArch64-specific variant which knows how to merge a downstream |
| * zero or sign extend into the read operation. |
| * |
| * @param readNode |
| */ |
| public static void replace(ReadNode readNode) { |
| assert readNode.getUsageCount() == 1; |
| assert readNode.getUsageAt(0) instanceof ZeroExtendNode || readNode.getUsageAt(0) instanceof SignExtendNode; |
| |
| ValueNode usage = (ValueNode) readNode.getUsageAt(0); |
| boolean isSigned = usage instanceof SignExtendNode; |
| IntegerStamp accessStamp = ((IntegerStamp) readNode.getAccessStamp()); |
| |
| AddressNode address = readNode.getAddress(); |
| LocationIdentity location = readNode.getLocationIdentity(); |
| Stamp stamp = usage.stamp(NodeView.DEFAULT); |
| GuardingNode guard = readNode.getGuard(); |
| BarrierType barrierType = readNode.getBarrierType(); |
| boolean nullCheck = readNode.getNullCheck(); |
| FrameState stateBefore = readNode.stateBefore(); |
| AArch64ReadNode clone = new AArch64ReadNode(address, location, stamp, guard, barrierType, nullCheck, stateBefore, accessStamp, isSigned); |
| StructuredGraph graph = readNode.graph(); |
| graph.add(clone); |
| // splice out the extend node |
| usage.replaceAtUsagesAndDelete(readNode); |
| // swap the clone for the read |
| graph.replaceFixedWithFixed(readNode, clone); |
| } |
| } |