| // 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.Sget; |
| import com.android.tools.r8.code.SgetBoolean; |
| import com.android.tools.r8.code.SgetByte; |
| import com.android.tools.r8.code.SgetChar; |
| import com.android.tools.r8.code.SgetObject; |
| import com.android.tools.r8.code.SgetShort; |
| import com.android.tools.r8.code.SgetWide; |
| 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 StaticGet extends FieldInstruction { |
| |
| public StaticGet(Value dest, DexField field) { |
| super(field, dest, (Value) null); |
| } |
| |
| public Value dest() { |
| return outValue; |
| } |
| |
| @Override |
| public boolean couldIntroduceAnAlias() { |
| return true; |
| } |
| |
| @Override |
| public void buildDex(DexBuilder builder) { |
| com.android.tools.r8.code.Instruction instruction; |
| int dest = builder.allocatedRegister(dest(), getNumber()); |
| DexField field = getField(); |
| switch (getType()) { |
| case INT: |
| case FLOAT: |
| instruction = new Sget(dest, field); |
| break; |
| case LONG: |
| case DOUBLE: |
| instruction = new SgetWide(dest, field); |
| break; |
| case OBJECT: |
| instruction = new SgetObject(dest, field); |
| break; |
| case BOOLEAN: |
| instruction = new SgetBoolean(dest, field); |
| break; |
| case BYTE: |
| instruction = new SgetByte(dest, field); |
| break; |
| case CHAR: |
| instruction = new SgetChar(dest, field); |
| break; |
| case SHORT: |
| instruction = new SgetShort(dest, field); |
| break; |
| case INT_OR_FLOAT: |
| case LONG_OR_DOUBLE: |
| throw new Unreachable("Unexpected imprecise type: " + getType()); |
| default: |
| throw new Unreachable("Unexpected type: " + getType()); |
| } |
| builder.add(this, instruction); |
| } |
| |
| @Override |
| public boolean instructionTypeCanThrow() { |
| // This can cause <clinit> to run. |
| return true; |
| } |
| |
| @Override |
| public int maxInValueRegister() { |
| return Constants.U8BIT_MAX; |
| } |
| |
| @Override |
| public int maxOutValueRegister() { |
| return Constants.U8BIT_MAX; |
| } |
| |
| @Override |
| public boolean identicalNonValueNonPositionParts(Instruction other) { |
| if (!other.isStaticGet()) { |
| return false; |
| } |
| StaticGet o = other.asStaticGet(); |
| return o.getField() == getField() && o.getType() == getType(); |
| } |
| |
| @Override |
| public ConstraintWithTarget inliningConstraint( |
| InliningConstraints inliningConstraints, DexType invocationContext) { |
| return inliningConstraints.forStaticGet(getField(), invocationContext); |
| } |
| |
| @Override |
| public String toString() { |
| return super.toString() + "; field: " + getField().toSourceString(); |
| } |
| |
| @Override |
| public boolean isStaticGet() { |
| return true; |
| } |
| |
| @Override |
| public StaticGet asStaticGet() { |
| return this; |
| } |
| |
| @Override |
| public void insertLoadAndStores(InstructionListIterator it, LoadStoreHelper helper) { |
| helper.storeOutValue(this, it); |
| } |
| |
| @Override |
| public void buildCf(CfBuilder builder) { |
| builder.add( |
| new CfFieldInstruction(Opcodes.GETSTATIC, getField(), builder.resolveField(getField()))); |
| } |
| |
| @Override |
| public DexType computeVerificationType(TypeVerificationHelper helper) { |
| return getField().type; |
| } |
| |
| @Override |
| public TypeLatticeElement evaluate(AppInfo appInfo) { |
| return TypeLatticeElement.fromDexType(getField().type, true, appInfo); |
| } |
| |
| @Override |
| public boolean triggersInitializationOfClass(DexType klass) { |
| return getField().clazz == klass; |
| } |
| } |