| // Copyright (c) 2018, 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.cf.code; |
| |
| import com.android.tools.r8.cf.CfPrinter; |
| import com.android.tools.r8.errors.Unreachable; |
| import com.android.tools.r8.graph.DexField; |
| import com.android.tools.r8.graph.DexType; |
| import com.android.tools.r8.graph.UseRegistry; |
| import com.android.tools.r8.ir.conversion.CfSourceCode; |
| import com.android.tools.r8.ir.conversion.CfState; |
| import com.android.tools.r8.ir.conversion.CfState.Slot; |
| import com.android.tools.r8.ir.conversion.IRBuilder; |
| import com.android.tools.r8.naming.NamingLens; |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Opcodes; |
| |
| public class CfFieldInstruction extends CfInstruction { |
| |
| private final int opcode; |
| private final DexField field; |
| private final DexField declaringField; |
| |
| public CfFieldInstruction(int opcode, DexField field, DexField declaringField) { |
| this.opcode = opcode; |
| this.field = field; |
| this.declaringField = declaringField; |
| assert field.type == declaringField.type; |
| } |
| |
| public DexField getField() { |
| return field; |
| } |
| |
| public int getOpcode() { |
| return opcode; |
| } |
| |
| @Override |
| public void write(MethodVisitor visitor, NamingLens lens) { |
| String owner = lens.lookupInternalName(field.getHolder()); |
| String name = lens.lookupName(declaringField).toString(); |
| String desc = lens.lookupDescriptor(field.type).toString(); |
| visitor.visitFieldInsn(opcode, owner, name, desc); |
| } |
| |
| @Override |
| public void print(CfPrinter printer) { |
| printer.print(this); |
| } |
| |
| @Override |
| public void registerUse(UseRegistry registry, DexType clazz) { |
| switch (opcode) { |
| case Opcodes.GETFIELD: |
| registry.registerInstanceFieldRead(field); |
| break; |
| case Opcodes.PUTFIELD: |
| registry.registerInstanceFieldWrite(field); |
| break; |
| case Opcodes.GETSTATIC: |
| registry.registerStaticFieldRead(field); |
| break; |
| case Opcodes.PUTSTATIC: |
| registry.registerStaticFieldWrite(field); |
| break; |
| default: |
| throw new Unreachable("Unexpected opcode " + opcode); |
| } |
| } |
| |
| @Override |
| public boolean canThrow() { |
| return true; |
| } |
| |
| @Override |
| public void buildIR(IRBuilder builder, CfState state, CfSourceCode code) { |
| DexType type = field.type; |
| switch (opcode) { |
| case Opcodes.GETSTATIC: |
| { |
| builder.addStaticGet(state.push(type).register, field); |
| break; |
| } |
| case Opcodes.PUTSTATIC: |
| { |
| Slot value = state.pop(); |
| builder.addStaticPut(value.register, field); |
| break; |
| } |
| case Opcodes.GETFIELD: |
| { |
| Slot object = state.pop(); |
| builder.addInstanceGet(state.push(type).register, object.register, field); |
| break; |
| } |
| case Opcodes.PUTFIELD: |
| { |
| Slot value = state.pop(); |
| Slot object = state.pop(); |
| builder.addInstancePut(value.register, object.register, field); |
| break; |
| } |
| default: |
| throw new Unreachable("Unexpected opcode " + opcode); |
| } |
| } |
| } |