| // Copyright (c) 2017, 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.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.IRBuilder; |
| import com.android.tools.r8.naming.NamingLens; |
| import org.objectweb.asm.MethodVisitor; |
| |
| public abstract class CfInstruction { |
| |
| public abstract void write(MethodVisitor visitor, NamingLens lens); |
| |
| public abstract void print(CfPrinter printer); |
| |
| @Override |
| public String toString() { |
| CfPrinter printer = new CfPrinter(); |
| print(printer); |
| return printer.toString(); |
| } |
| |
| public void registerUse(UseRegistry registry, DexType clazz) { |
| // Intentionally empty. |
| } |
| |
| public CfLabel getTarget() { |
| return null; |
| } |
| |
| /** Return true if this instruction is CfReturn or CfReturnVoid. */ |
| public boolean isReturn() { |
| return false; |
| } |
| |
| /** Return true if this instruction is CfIf or CfIfCmp. */ |
| public boolean isConditionalJump() { |
| return false; |
| } |
| |
| /** Return true if this instruction or its DEX equivalent can throw. */ |
| public boolean canThrow() { |
| return false; |
| } |
| |
| public abstract void buildIR(IRBuilder builder, CfState state, CfSourceCode code); |
| |
| /** Return true if this instruction directly emits IR instructions. */ |
| public boolean emitsIR() { |
| return true; |
| } |
| } |