| // Copyright (c) 2016, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| package com.android.tools.r8.ir.code; |
| |
| import com.android.tools.r8.cf.LoadStoreHelper; |
| import com.android.tools.r8.cf.TypeVerificationHelper; |
| import com.android.tools.r8.cf.code.CfInstanceFieldRead; |
| import com.android.tools.r8.code.Iget; |
| import com.android.tools.r8.code.IgetBoolean; |
| import com.android.tools.r8.code.IgetByte; |
| import com.android.tools.r8.code.IgetChar; |
| import com.android.tools.r8.code.IgetObject; |
| import com.android.tools.r8.code.IgetShort; |
| import com.android.tools.r8.code.IgetWide; |
| import com.android.tools.r8.dex.Constants; |
| import com.android.tools.r8.errors.Unreachable; |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.DexField; |
| import com.android.tools.r8.graph.DexType; |
| import com.android.tools.r8.graph.ProgramMethod; |
| import com.android.tools.r8.ir.analysis.ClassInitializationAnalysis; |
| import com.android.tools.r8.ir.analysis.ClassInitializationAnalysis.AnalysisAssumption; |
| import com.android.tools.r8.ir.analysis.ClassInitializationAnalysis.Query; |
| import com.android.tools.r8.ir.analysis.type.Nullability; |
| import com.android.tools.r8.ir.analysis.type.TypeElement; |
| import com.android.tools.r8.ir.conversion.CfBuilder; |
| import com.android.tools.r8.ir.conversion.DexBuilder; |
| import com.android.tools.r8.ir.optimize.Inliner.ConstraintWithTarget; |
| import com.android.tools.r8.ir.optimize.InliningConstraints; |
| import com.android.tools.r8.shaking.AppInfoWithLiveness; |
| import java.util.Set; |
| |
| public class InstanceGet extends FieldInstruction implements FieldGet, InstanceFieldInstruction { |
| |
| public InstanceGet(Value dest, Value object, DexField field) { |
| super(field, dest, object); |
| } |
| |
| @Override |
| public int opcode() { |
| return Opcodes.INSTANCE_GET; |
| } |
| |
| @Override |
| public boolean outTypeKnownToBeBoolean(Set<Phi> seen) { |
| return getField().type.isBooleanType(); |
| } |
| |
| @Override |
| public <T> T accept(InstructionVisitor<T> visitor) { |
| return visitor.visit(this); |
| } |
| |
| public Value dest() { |
| return outValue; |
| } |
| |
| @Override |
| public Value object() { |
| assert inValues.size() == 1; |
| return inValues.get(0); |
| } |
| |
| @Override |
| public Value value() { |
| return outValue; |
| } |
| |
| @Override |
| public boolean couldIntroduceAnAlias(AppView<?> appView, Value root) { |
| assert root != null && root.getType().isReferenceType(); |
| assert outValue != null; |
| return outValue.getType().isReferenceType(); |
| } |
| |
| @Override |
| public void buildDex(DexBuilder builder) { |
| int destRegister = builder.allocatedRegister(dest(), getNumber()); |
| int objectRegister = builder.allocatedRegister(object(), getNumber()); |
| com.android.tools.r8.code.Instruction instruction; |
| DexField field = getField(); |
| switch (getType()) { |
| case INT: |
| case FLOAT: |
| instruction = new Iget(destRegister, objectRegister, field); |
| break; |
| case LONG: |
| case DOUBLE: |
| instruction = new IgetWide(destRegister, objectRegister, field); |
| break; |
| case OBJECT: |
| instruction = new IgetObject(destRegister, objectRegister, field); |
| break; |
| case BOOLEAN: |
| instruction = new IgetBoolean(destRegister, objectRegister, field); |
| break; |
| case BYTE: |
| instruction = new IgetByte(destRegister, objectRegister, field); |
| break; |
| case CHAR: |
| instruction = new IgetChar(destRegister, objectRegister, field); |
| break; |
| case SHORT: |
| instruction = new IgetShort(destRegister, objectRegister, field); |
| break; |
| default: |
| throw new Unreachable("Unexpected type: " + getType()); |
| } |
| builder.add(this, instruction); |
| } |
| |
| @Override |
| public boolean instructionTypeCanThrow() { |
| return true; |
| } |
| |
| @Override |
| public boolean instructionMayHaveSideEffects( |
| AppView<?> appView, ProgramMethod context, SideEffectAssumption assumption) { |
| return instructionInstanceCanThrow(appView, context, assumption); |
| } |
| |
| @Override |
| public int maxInValueRegister() { |
| return Constants.U4BIT_MAX; |
| } |
| |
| @Override |
| public int maxOutValueRegister() { |
| return Constants.U4BIT_MAX; |
| } |
| |
| @Override |
| public boolean identicalNonValueNonPositionParts(Instruction other) { |
| if (!other.isInstanceGet()) { |
| return false; |
| } |
| InstanceGet o = other.asInstanceGet(); |
| return o.getField() == getField() && o.getType() == getType(); |
| } |
| |
| @Override |
| public ConstraintWithTarget inliningConstraint( |
| InliningConstraints inliningConstraints, ProgramMethod context) { |
| return inliningConstraints.forInstanceGet(getField(), context); |
| } |
| |
| @Override |
| public boolean isFieldGet() { |
| return true; |
| } |
| |
| @Override |
| public FieldGet asFieldGet() { |
| return this; |
| } |
| |
| @Override |
| public boolean isInstanceFieldInstruction() { |
| return true; |
| } |
| |
| @Override |
| public InstanceFieldInstruction asInstanceFieldInstruction() { |
| return this; |
| } |
| |
| @Override |
| public boolean isInstanceGet() { |
| return true; |
| } |
| |
| @Override |
| public InstanceGet asInstanceGet() { |
| return this; |
| } |
| |
| @Override |
| public String toString() { |
| return super.toString() + "; field: " + getField().toSourceString(); |
| } |
| |
| @Override |
| public TypeElement evaluate(AppView<?> appView) { |
| return TypeElement.fromDexType(getField().type, Nullability.maybeNull(), appView); |
| } |
| |
| @Override |
| public DexType computeVerificationType(AppView<?> appView, TypeVerificationHelper helper) { |
| return getField().type; |
| } |
| |
| @Override |
| public void insertLoadAndStores(InstructionListIterator it, LoadStoreHelper helper) { |
| helper.loadInValues(this, it); |
| helper.storeOutValue(this, it); |
| } |
| |
| @Override |
| public void buildCf(CfBuilder builder) { |
| builder.add(new CfInstanceFieldRead(getField(), builder.resolveField(getField()))); |
| } |
| |
| @Override |
| public boolean throwsNpeIfValueIsNull(Value value, AppView<?> appView, ProgramMethod context) { |
| return object() == value; |
| } |
| |
| @Override |
| public boolean throwsOnNullInput() { |
| return true; |
| } |
| |
| @Override |
| public Value getNonNullInput() { |
| return object(); |
| } |
| |
| @Override |
| public boolean definitelyTriggersClassInitialization( |
| DexType clazz, |
| ProgramMethod context, |
| AppView<AppInfoWithLiveness> appView, |
| Query mode, |
| AnalysisAssumption assumption) { |
| return ClassInitializationAnalysis.InstructionUtils.forInstanceGet( |
| this, clazz, appView, mode, assumption); |
| } |
| |
| @Override |
| public boolean instructionMayTriggerMethodInvocation(AppView<?> appView, ProgramMethod context) { |
| return false; |
| } |
| } |