| // 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.CfFieldInstruction; |
| 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.AppInfo; |
| import com.android.tools.r8.graph.DexField; |
| import com.android.tools.r8.graph.DexType; |
| import com.android.tools.r8.ir.analysis.type.TypeLatticeElement; |
| 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 org.objectweb.asm.Opcodes; |
| |
| public class InstanceGet extends FieldInstruction { |
| |
| public InstanceGet(MemberType type, Value dest, Value object, DexField field) { |
| super(type, field, dest, object); |
| } |
| |
| public Value dest() { |
| return outValue; |
| } |
| |
| public Value object() { |
| assert inValues.size() == 1; |
| return inValues.get(0); |
| } |
| |
| @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; |
| switch (type) { |
| case INT: |
| case FLOAT: |
| case INT_OR_FLOAT: |
| instruction = new Iget(destRegister, objectRegister, field); |
| break; |
| case LONG: |
| case DOUBLE: |
| case LONG_OR_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 " + type); |
| } |
| builder.add(this, instruction); |
| } |
| |
| @Override |
| public boolean instructionTypeCanThrow() { |
| return true; |
| } |
| |
| @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.field == field && o.type == type; |
| } |
| |
| @Override |
| public int compareNonValueParts(Instruction other) { |
| InstanceGet o = other.asInstanceGet(); |
| int result = field.slowCompareTo(o.field); |
| if (result != 0) { |
| return result; |
| } |
| return type.ordinal() - o.type.ordinal(); |
| } |
| |
| @Override |
| public ConstraintWithTarget inliningConstraint( |
| InliningConstraints inliningConstraints, DexType invocationContext) { |
| return inliningConstraints.forInstanceGet(field, invocationContext); |
| } |
| |
| @Override |
| public boolean isInstanceGet() { |
| return true; |
| } |
| |
| @Override |
| public InstanceGet asInstanceGet() { |
| return this; |
| } |
| |
| @Override |
| public String toString() { |
| return super.toString() + "; field: " + field.toSourceString(); |
| } |
| |
| @Override |
| public TypeLatticeElement evaluate(AppInfo appInfo) { |
| return TypeLatticeElement.fromDexType(field.type, true, appInfo); |
| } |
| |
| @Override |
| public DexType computeVerificationType(TypeVerificationHelper helper) { |
| return field.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 CfFieldInstruction(Opcodes.GETFIELD, field, builder.resolveField(field))); |
| } |
| |
| @Override |
| public boolean throwsNpeIfValueIsNull(Value value) { |
| return object() == value; |
| } |
| } |