| // 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.code.CfArrayStore; |
| import com.android.tools.r8.code.Aput; |
| import com.android.tools.r8.code.AputBoolean; |
| import com.android.tools.r8.code.AputByte; |
| import com.android.tools.r8.code.AputChar; |
| import com.android.tools.r8.code.AputObject; |
| import com.android.tools.r8.code.AputShort; |
| import com.android.tools.r8.code.AputWide; |
| 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.DexItemFactory; |
| import com.android.tools.r8.graph.DexType; |
| import com.android.tools.r8.ir.conversion.CfBuilder; |
| import com.android.tools.r8.ir.conversion.DexBuilder; |
| import com.android.tools.r8.ir.conversion.TypeConstraintResolver; |
| import com.android.tools.r8.ir.optimize.Inliner.ConstraintWithTarget; |
| import com.android.tools.r8.ir.optimize.InliningConstraints; |
| import com.android.tools.r8.ir.regalloc.RegisterAllocator; |
| import java.util.Arrays; |
| |
| public class ArrayPut extends Instruction implements ImpreciseMemberTypeInstruction { |
| |
| // Input values are ordered according to the stack order of the Java bytecode astore. |
| private static final int ARRAY_INDEX = 0; |
| private static final int INDEX_INDEX = 1; |
| private static final int VALUE_INDEX = 2; |
| |
| private MemberType type; |
| |
| public ArrayPut(MemberType type, Value array, Value index, Value value) { |
| super(null, Arrays.asList(array, index, value)); |
| assert type != null; |
| assert array.verifyCompatible(ValueType.OBJECT); |
| assert index.verifyCompatible(ValueType.INT); |
| this.type = type; |
| } |
| |
| @Override |
| public <T> T accept(InstructionVisitor<T> visitor) { |
| return visitor.visit(this); |
| } |
| |
| public Value array() { |
| return inValues.get(ARRAY_INDEX); |
| } |
| |
| public Value index() { |
| return inValues.get(INDEX_INDEX); |
| } |
| |
| public Value value() { |
| return inValues.get(VALUE_INDEX); |
| } |
| |
| @Override |
| public MemberType getMemberType() { |
| return type; |
| } |
| |
| @Override |
| public void buildDex(DexBuilder builder) { |
| int value = builder.allocatedRegister(value(), getNumber()); |
| int array = builder.allocatedRegister(array(), getNumber()); |
| int index = builder.allocatedRegister(index(), getNumber()); |
| com.android.tools.r8.code.Instruction instruction; |
| switch (type) { |
| case INT: |
| case FLOAT: |
| instruction = new Aput(value, array, index); |
| break; |
| case LONG: |
| case DOUBLE: |
| instruction = new AputWide(value, array, index); |
| break; |
| case OBJECT: |
| instruction = new AputObject(value, array, index); |
| break; |
| case BOOLEAN: |
| instruction = new AputBoolean(value, array, index); |
| break; |
| case BYTE: |
| instruction = new AputByte(value, array, index); |
| break; |
| case CHAR: |
| instruction = new AputChar(value, array, index); |
| break; |
| case SHORT: |
| instruction = new AputShort(value, array, index); |
| break; |
| case INT_OR_FLOAT: |
| case LONG_OR_DOUBLE: |
| throw new Unreachable("Unexpected imprecise type: " + type); |
| default: |
| throw new Unreachable("Unexpected type: " + type); |
| } |
| builder.add(this, instruction); |
| } |
| |
| @Override |
| public int maxInValueRegister() { |
| return Constants.U8BIT_MAX; |
| } |
| |
| @Override |
| public int maxOutValueRegister() { |
| assert false : "ArrayPut instructions define no values."; |
| return 0; |
| } |
| |
| @Override |
| public boolean instructionTypeCanThrow() { |
| return true; |
| } |
| |
| @Override |
| public boolean instructionInstanceCanThrow() { |
| if (index().isConstant() && !array().isPhi() && array().definition.isNewArrayEmpty()) { |
| Value newArraySizeValue = array().definition.asNewArrayEmpty().size(); |
| if (newArraySizeValue.isConstant()) { |
| int newArraySize = newArraySizeValue.getConstInstruction().asConstNumber().getIntValue(); |
| int index = index().getConstInstruction().asConstNumber().getIntValue(); |
| return newArraySize <= 0 || index < 0 || newArraySize <= index; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean canBeDeadCode(AppView<?> appView, IRCode code) { |
| // ArrayPut has side-effects on input values. |
| return false; |
| } |
| |
| @Override |
| public boolean identicalAfterRegisterAllocation(Instruction other, RegisterAllocator allocator) { |
| // We cannot share ArrayPut instructions without knowledge of the type of the array input. |
| // If multiple primitive array types flow to the same ArrayPut instruction the art verifier |
| // gets confused. |
| return false; |
| } |
| |
| @Override |
| public boolean identicalNonValueNonPositionParts(Instruction other) { |
| return other.isArrayPut() && other.asArrayPut().type == type; |
| } |
| |
| @Override |
| public boolean isArrayPut() { |
| return true; |
| } |
| |
| @Override |
| public ArrayPut asArrayPut() { |
| return this; |
| } |
| |
| @Override |
| public ConstraintWithTarget inliningConstraint( |
| InliningConstraints inliningConstraints, DexType invocationContext) { |
| return inliningConstraints.forArrayPut(); |
| } |
| |
| @Override |
| public void insertLoadAndStores(InstructionListIterator it, LoadStoreHelper helper) { |
| helper.loadInValues(this, it); |
| } |
| |
| @Override |
| public boolean hasInvariantOutType() { |
| return true; |
| } |
| |
| @Override |
| public void buildCf(CfBuilder builder) { |
| builder.add(new CfArrayStore(type)); |
| } |
| |
| @Override |
| public boolean throwsNpeIfValueIsNull(Value value, DexItemFactory dexItemFactory) { |
| return array() == value; |
| } |
| |
| @Override |
| public boolean throwsOnNullInput() { |
| return true; |
| } |
| |
| @Override |
| public Value getNonNullInput() { |
| return array(); |
| } |
| |
| @Override |
| public void constrainType(TypeConstraintResolver constraintResolver) { |
| constraintResolver.constrainArrayMemberType(type, value(), array(), t -> type = t); |
| } |
| } |