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/*
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* Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.hotspot.aarch64;
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import static org.graalvm.compiler.lir.LIRValueUtil.asConstant;
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import static org.graalvm.compiler.lir.LIRValueUtil.isConstantValue;
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import java.util.function.Function;
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import org.graalvm.compiler.asm.Label;
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import org.graalvm.compiler.asm.aarch64.AArch64Address.AddressingMode;
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import org.graalvm.compiler.asm.aarch64.AArch64Assembler.PrefetchMode;
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import org.graalvm.compiler.asm.aarch64.AArch64Assembler.ConditionFlag;
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import org.graalvm.compiler.core.aarch64.AArch64ArithmeticLIRGenerator;
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import org.graalvm.compiler.core.aarch64.AArch64LIRGenerator;
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import org.graalvm.compiler.core.aarch64.AArch64LIRKindTool;
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import org.graalvm.compiler.core.common.CompressEncoding;
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import org.graalvm.compiler.core.common.LIRKind;
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import org.graalvm.compiler.core.common.calc.Condition;
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import org.graalvm.compiler.core.common.spi.ForeignCallLinkage;
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import org.graalvm.compiler.core.common.spi.LIRKindTool;
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import org.graalvm.compiler.debug.GraalError;
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import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
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import org.graalvm.compiler.hotspot.HotSpotBackend;
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import org.graalvm.compiler.hotspot.HotSpotDebugInfoBuilder;
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import org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage;
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import org.graalvm.compiler.hotspot.HotSpotLIRGenerationResult;
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import org.graalvm.compiler.hotspot.HotSpotLIRGenerator;
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import org.graalvm.compiler.hotspot.HotSpotLockStack;
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import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
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import org.graalvm.compiler.hotspot.meta.HotSpotRegistersProvider;
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import org.graalvm.compiler.hotspot.stubs.Stub;
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import org.graalvm.compiler.lir.LIRFrameState;
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import org.graalvm.compiler.lir.LIRInstruction;
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import org.graalvm.compiler.lir.LabelRef;
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import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp;
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import org.graalvm.compiler.lir.SwitchStrategy;
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import org.graalvm.compiler.lir.Variable;
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import org.graalvm.compiler.lir.VirtualStackSlot;
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import org.graalvm.compiler.lir.aarch64.AArch64AddressValue;
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import org.graalvm.compiler.lir.aarch64.AArch64CCall;
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import org.graalvm.compiler.lir.aarch64.AArch64Call;
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import org.graalvm.compiler.lir.aarch64.AArch64ControlFlow.StrategySwitchOp;
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import org.graalvm.compiler.lir.aarch64.AArch64FrameMapBuilder;
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import org.graalvm.compiler.lir.aarch64.AArch64Move;
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import org.graalvm.compiler.lir.aarch64.AArch64Move.StoreOp;
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import org.graalvm.compiler.lir.aarch64.AArch64PrefetchOp;
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import org.graalvm.compiler.lir.gen.LIRGenerationResult;
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import jdk.vm.ci.aarch64.AArch64;
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import jdk.vm.ci.aarch64.AArch64Kind;
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import jdk.vm.ci.code.CallingConvention;
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import jdk.vm.ci.code.Register;
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import jdk.vm.ci.code.RegisterValue;
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import jdk.vm.ci.code.StackSlot;
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import jdk.vm.ci.hotspot.HotSpotCompressedNullConstant;
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import jdk.vm.ci.hotspot.HotSpotObjectConstant;
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import jdk.vm.ci.meta.AllocatableValue;
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import jdk.vm.ci.meta.Constant;
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import jdk.vm.ci.meta.DeoptimizationAction;
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import jdk.vm.ci.meta.DeoptimizationReason;
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import jdk.vm.ci.meta.JavaConstant;
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import jdk.vm.ci.meta.JavaKind;
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import jdk.vm.ci.meta.PlatformKind;
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import jdk.vm.ci.meta.Value;
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/**
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* LIR generator specialized for AArch64 HotSpot.
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*/
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public class AArch64HotSpotLIRGenerator extends AArch64LIRGenerator implements HotSpotLIRGenerator {
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final GraalHotSpotVMConfig config;
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private HotSpotDebugInfoBuilder debugInfoBuilder;
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protected AArch64HotSpotLIRGenerator(HotSpotProviders providers, GraalHotSpotVMConfig config, LIRGenerationResult lirGenRes) {
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this(new AArch64LIRKindTool(), new AArch64ArithmeticLIRGenerator(), new AArch64HotSpotMoveFactory(), providers, config, lirGenRes);
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}
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protected AArch64HotSpotLIRGenerator(LIRKindTool lirKindTool, AArch64ArithmeticLIRGenerator arithmeticLIRGen, MoveFactory moveFactory, HotSpotProviders providers, GraalHotSpotVMConfig config,
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LIRGenerationResult lirGenRes) {
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super(lirKindTool, arithmeticLIRGen, moveFactory, providers, lirGenRes);
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this.config = config;
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}
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@Override
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public HotSpotProviders getProviders() {
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return (HotSpotProviders) super.getProviders();
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}
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@Override
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public boolean needOnlyOopMaps() {
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// Stubs only need oop maps
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return getResult().getStub() != null;
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}
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@SuppressWarnings("unused") private LIRFrameState currentRuntimeCallInfo;
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@Override
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protected void emitForeignCallOp(ForeignCallLinkage linkage, Value result, Value[] arguments, Value[] temps, LIRFrameState info) {
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currentRuntimeCallInfo = info;
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if (AArch64Call.isNearCall(linkage)) {
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append(new AArch64Call.DirectNearForeignCallOp(linkage, result, arguments, temps, info, label));
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} else {
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append(new AArch64Call.DirectFarForeignCallOp(linkage, result, arguments, temps, info, label));
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}
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}
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@Override
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public void emitTailcall(Value[] args, Value address) {
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throw GraalError.unimplemented();
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}
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@Override
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public void emitCCall(long address, CallingConvention nativeCallingConvention, Value[] args) {
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Value[] argLocations = new Value[args.length];
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getResult().getFrameMapBuilder().callsMethod(nativeCallingConvention);
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for (int i = 0; i < args.length; i++) {
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Value arg = args[i];
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AllocatableValue loc = nativeCallingConvention.getArgument(i);
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emitMove(loc, arg);
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argLocations[i] = loc;
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}
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Value ptr = emitLoadConstant(LIRKind.value(AArch64Kind.QWORD), JavaConstant.forLong(address));
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append(new AArch64CCall(nativeCallingConvention.getReturn(), ptr, argLocations));
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}
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public SaveRegistersOp emitSaveAllRegisters() {
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throw GraalError.unimplemented();
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}
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@Override
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public VirtualStackSlot getLockSlot(int lockDepth) {
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return getLockStack().makeLockSlot(lockDepth);
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}
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private HotSpotLockStack getLockStack() {
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assert debugInfoBuilder != null && debugInfoBuilder.lockStack() != null;
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return debugInfoBuilder.lockStack();
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}
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@Override
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public void emitCompareBranch(PlatformKind cmpKind, Value x, Value y, Condition cond, boolean unorderedIsTrue, LabelRef trueDestination, LabelRef falseDestination,
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double trueDestinationProbability) {
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Value localX = x;
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Value localY = y;
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if (localX instanceof HotSpotObjectConstant) {
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localX = load(localX);
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}
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if (localY instanceof HotSpotObjectConstant) {
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localY = load(localY);
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}
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super.emitCompareBranch(cmpKind, localX, localY, cond, unorderedIsTrue, trueDestination, falseDestination, trueDestinationProbability);
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}
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@Override
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protected boolean emitCompare(PlatformKind cmpKind, Value a, Value b, Condition condition, boolean unorderedIsTrue) {
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Value localA = a;
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Value localB = b;
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if (isConstantValue(a)) {
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Constant c = asConstant(a);
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if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(c)) {
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localA = AArch64.zr.asValue(LIRKind.value(AArch64Kind.DWORD));
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} else if (c instanceof HotSpotObjectConstant) {
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localA = load(localA);
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}
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}
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if (isConstantValue(b)) {
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Constant c = asConstant(b);
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if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(c)) {
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localB = AArch64.zr.asValue(LIRKind.value(AArch64Kind.DWORD));
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} else if (c instanceof HotSpotObjectConstant) {
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localB = load(localB);
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}
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}
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return super.emitCompare(cmpKind, localA, localB, condition, unorderedIsTrue);
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}
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@Override
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public Value emitCompress(Value pointer, CompressEncoding encoding, boolean nonNull) {
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LIRKind inputKind = pointer.getValueKind(LIRKind.class);
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assert inputKind.getPlatformKind() == AArch64Kind.QWORD;
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if (inputKind.isReference(0)) {
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// oop
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Variable result = newVariable(LIRKind.reference(AArch64Kind.DWORD));
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append(new AArch64HotSpotMove.CompressPointer(result, asAllocatable(pointer), getProviders().getRegisters().getHeapBaseRegister().asValue(), encoding, nonNull));
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return result;
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} else {
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// metaspace pointer
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Variable result = newVariable(LIRKind.value(AArch64Kind.DWORD));
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AllocatableValue base = Value.ILLEGAL;
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if (encoding.hasBase()) {
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base = emitLoadConstant(LIRKind.value(AArch64Kind.QWORD), JavaConstant.forLong(encoding.getBase()));
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}
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append(new AArch64HotSpotMove.CompressPointer(result, asAllocatable(pointer), base, encoding, nonNull));
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return result;
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}
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}
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@Override
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public Value emitUncompress(Value pointer, CompressEncoding encoding, boolean nonNull) {
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LIRKind inputKind = pointer.getValueKind(LIRKind.class);
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assert inputKind.getPlatformKind() == AArch64Kind.DWORD;
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if (inputKind.isReference(0)) {
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// oop
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Variable result = newVariable(LIRKind.reference(AArch64Kind.QWORD));
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append(new AArch64HotSpotMove.UncompressPointer(result, asAllocatable(pointer), getProviders().getRegisters().getHeapBaseRegister().asValue(), encoding, nonNull));
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return result;
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} else {
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// metaspace pointer
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Variable result = newVariable(LIRKind.value(AArch64Kind.QWORD));
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AllocatableValue base = Value.ILLEGAL;
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if (encoding.hasBase()) {
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base = emitLoadConstant(LIRKind.value(AArch64Kind.QWORD), JavaConstant.forLong(encoding.getBase()));
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}
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append(new AArch64HotSpotMove.UncompressPointer(result, asAllocatable(pointer), base, encoding, nonNull));
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return result;
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}
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}
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@Override
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public void emitNullCheck(Value address, LIRFrameState state) {
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if (address.getValueKind().getPlatformKind() == AArch64Kind.DWORD) {
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CompressEncoding encoding = config.getOopEncoding();
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Value uncompressed = emitUncompress(address, encoding, false);
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append(new AArch64Move.NullCheckOp(asAddressValue(uncompressed), state));
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} else {
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super.emitNullCheck(address, state);
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}
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}
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@Override
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public void emitPrefetchAllocate(Value address) {
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append(new AArch64PrefetchOp(asAddressValue(address), PrefetchMode.PSTL1KEEP));
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}
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@Override
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public void beforeRegisterAllocation() {
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super.beforeRegisterAllocation();
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boolean hasDebugInfo = getResult().getLIR().hasDebugInfo();
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if (hasDebugInfo) {
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getResult().setDeoptimizationRescueSlot(((AArch64FrameMapBuilder) getResult().getFrameMapBuilder()).allocateDeoptimizationRescueSlot());
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}
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getResult().setMaxInterpreterFrameSize(debugInfoBuilder.maxInterpreterFrameSize());
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}
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private Label label;
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@Override
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public Variable emitForeignCall(ForeignCallLinkage linkage, LIRFrameState state, Value... args) {
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HotSpotForeignCallLinkage hotspotLinkage = (HotSpotForeignCallLinkage) linkage;
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Variable result;
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LIRFrameState debugInfo = null;
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if (hotspotLinkage.needsDebugInfo()) {
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debugInfo = state;
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assert debugInfo != null || getStub() != null;
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}
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if (linkage.destroysRegisters() || hotspotLinkage.needsJavaFrameAnchor()) {
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HotSpotRegistersProvider registers = getProviders().getRegisters();
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Register thread = registers.getThreadRegister();
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Variable scratch = newVariable(LIRKind.value(target().arch.getWordKind()));
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// We need a label for the return address.
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label = new Label();
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append(new AArch64HotSpotCRuntimeCallPrologueOp(config.threadLastJavaSpOffset(), config.threadLastJavaPcOffset(), config.threadLastJavaFpOffset(), thread, scratch, label));
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result = super.emitForeignCall(hotspotLinkage, debugInfo, args);
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append(new AArch64HotSpotCRuntimeCallEpilogueOp(config.threadLastJavaSpOffset(), config.threadLastJavaFpOffset(), thread));
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// Clear it out so it's not being reused later.
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label = null;
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} else {
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result = super.emitForeignCall(hotspotLinkage, debugInfo, args);
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}
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return result;
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}
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@Override
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public void emitDeoptimizeCaller(DeoptimizationAction action, DeoptimizationReason reason) {
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Value actionAndReason = emitJavaConstant(getMetaAccess().encodeDeoptActionAndReason(action, reason, 0));
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Value nullValue = emitConstant(LIRKind.reference(AArch64Kind.QWORD), JavaConstant.NULL_POINTER);
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moveDeoptValuesToThread(actionAndReason, nullValue);
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append(new AArch64HotSpotDeoptimizeCallerOp(config));
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}
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@Override
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public void emitDeoptimize(Value actionAndReason, Value failedSpeculation, LIRFrameState state) {
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moveDeoptValuesToThread(actionAndReason, failedSpeculation);
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append(new AArch64HotSpotDeoptimizeOp(state));
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}
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private void moveDeoptValuesToThread(Value actionAndReason, Value speculation) {
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moveValueToThread(actionAndReason, config.pendingDeoptimizationOffset);
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moveValueToThread(speculation, config.pendingFailedSpeculationOffset);
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}
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private void moveValueToThread(Value value, int offset) {
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LIRKind wordKind = LIRKind.value(target().arch.getWordKind());
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RegisterValue thread = getProviders().getRegisters().getThreadRegister().asValue(wordKind);
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final int transferSize = value.getValueKind().getPlatformKind().getSizeInBytes();
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AArch64AddressValue address = new AArch64AddressValue(value.getValueKind(), thread, Value.ILLEGAL, offset, transferSize, AddressingMode.IMMEDIATE_SCALED);
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append(new StoreOp((AArch64Kind) value.getPlatformKind(), address, loadReg(value), null));
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}
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@Override
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public void emitUnwind(Value exception) {
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ForeignCallLinkage linkage = getForeignCalls().lookupForeignCall(HotSpotBackend.UNWIND_EXCEPTION_TO_CALLER);
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CallingConvention outgoingCc = linkage.getOutgoingCallingConvention();
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assert outgoingCc.getArgumentCount() == 2;
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RegisterValue exceptionParameter = (RegisterValue) outgoingCc.getArgument(0);
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emitMove(exceptionParameter, exception);
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append(new AArch64HotSpotUnwindOp(config, exceptionParameter));
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}
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@Override
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public void emitReturn(JavaKind kind, Value input) {
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AllocatableValue operand = Value.ILLEGAL;
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if (input != null) {
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operand = resultOperandFor(kind, input.getValueKind());
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emitMove(operand, input);
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}
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append(new AArch64HotSpotReturnOp(operand, getStub() != null, config));
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}
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|
347 |
|
|
348 |
/**
|
|
349 |
* Gets the {@link Stub} this generator is generating code for or {@code null} if a stub is not
|
|
350 |
* being generated.
|
|
351 |
*/
|
|
352 |
public Stub getStub() {
|
|
353 |
return getResult().getStub();
|
|
354 |
}
|
|
355 |
|
|
356 |
@Override
|
|
357 |
public HotSpotLIRGenerationResult getResult() {
|
|
358 |
return ((HotSpotLIRGenerationResult) super.getResult());
|
|
359 |
}
|
|
360 |
|
|
361 |
@Override
|
|
362 |
protected StrategySwitchOp createStrategySwitchOp(SwitchStrategy strategy, LabelRef[] keyTargets, LabelRef defaultTarget, Variable key, AllocatableValue scratchValue,
|
|
363 |
Function<Condition, ConditionFlag> converter) {
|
|
364 |
return new AArch64HotSpotStrategySwitchOp(strategy, keyTargets, defaultTarget, key, scratchValue, converter);
|
|
365 |
}
|
|
366 |
|
|
367 |
public void setDebugInfoBuilder(HotSpotDebugInfoBuilder debugInfoBuilder) {
|
|
368 |
this.debugInfoBuilder = debugInfoBuilder;
|
|
369 |
}
|
|
370 |
|
|
371 |
@Override
|
|
372 |
public SaveRegistersOp createZapRegisters(Register[] zappedRegisters, JavaConstant[] zapValues) {
|
|
373 |
throw GraalError.unimplemented();
|
|
374 |
}
|
|
375 |
|
|
376 |
@Override
|
|
377 |
public LIRInstruction createZapArgumentSpace(StackSlot[] zappedStack, JavaConstant[] zapValues) {
|
|
378 |
throw GraalError.unimplemented();
|
|
379 |
}
|
|
380 |
}
|