| /* |
| * Copyright (c) 2017, 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.core.amd64; |
| |
| import jdk.vm.ci.code.Register; |
| import org.graalvm.compiler.asm.amd64.AMD64Address; |
| import org.graalvm.compiler.core.common.LIRKind; |
| import org.graalvm.compiler.core.common.type.StampFactory; |
| import org.graalvm.compiler.debug.CounterKey; |
| import org.graalvm.compiler.debug.DebugContext; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.CompressionNode; |
| import org.graalvm.compiler.nodes.NodeView; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.calc.FloatingNode; |
| import org.graalvm.compiler.nodes.spi.LIRLowerable; |
| import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; |
| |
| import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0; |
| import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0; |
| |
| public abstract class AMD64CompressAddressLowering extends AMD64AddressLowering { |
| private static final CounterKey counterFoldedUncompressDuringAddressLowering = DebugContext.counter("FoldedUncompressDuringAddressLowering"); |
| |
| @Override |
| protected final boolean improve(StructuredGraph graph, DebugContext debug, AMD64AddressNode addr, boolean isBaseNegated, boolean isIndexNegated) { |
| if (super.improve(graph, debug, addr, isBaseNegated, isIndexNegated)) { |
| return true; |
| } |
| |
| if (!isBaseNegated && !isIndexNegated && addr.getScale() == AMD64Address.Scale.Times1) { |
| ValueNode base = addr.getBase(); |
| ValueNode index = addr.getIndex(); |
| |
| if (tryToImproveUncompression(addr, index, base) || tryToImproveUncompression(addr, base, index)) { |
| counterFoldedUncompressDuringAddressLowering.increment(debug); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| private boolean tryToImproveUncompression(AMD64AddressNode addr, ValueNode value, ValueNode other) { |
| if (value instanceof CompressionNode) { |
| CompressionNode compression = (CompressionNode) value; |
| if (compression.getOp() == CompressionNode.CompressionOp.Uncompress && improveUncompression(addr, compression, other)) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| protected abstract boolean improveUncompression(AMD64AddressNode addr, CompressionNode compression, ValueNode other); |
| |
| @NodeInfo(cycles = CYCLES_0, size = SIZE_0) |
| public static class HeapBaseNode extends FloatingNode implements LIRLowerable { |
| |
| public static final NodeClass<HeapBaseNode> TYPE = NodeClass.create(HeapBaseNode.class); |
| |
| private final Register heapBaseRegister; |
| |
| public HeapBaseNode(Register heapBaseRegister) { |
| super(TYPE, StampFactory.pointer()); |
| this.heapBaseRegister = heapBaseRegister; |
| } |
| |
| @Override |
| public void generate(NodeLIRBuilderTool generator) { |
| LIRKind kind = generator.getLIRGeneratorTool().getLIRKind(stamp(NodeView.DEFAULT)); |
| generator.setResult(this, heapBaseRegister.asValue(kind)); |
| } |
| } |
| } |