src/test/java/com/android/tools/r8/graph/invokespecial/TestClassDump.java

// 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.graph.invokespecial;

import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;

// Generated by running ./tools/asmifier.py build/classes/test/com/android/tools/r8/graph/-
// invokespecial/TestClass.class, and changing the invoke-virtual TestClass.m() instruction to
// an invoke-special instruction.
public class TestClassDump implements Opcodes {

  public static byte[] dump() throws Exception {

    ClassWriter cw = new ClassWriter(0);
    FieldVisitor fv;
    MethodVisitor mv;
    AnnotationVisitor av0;

    cw.visit(
        V1_8,
        ACC_PUBLIC + ACC_SUPER,
        "com/android/tools/r8/graph/invokespecial/TestClass",
        null,
        "java/lang/Object",
        null);

    {
      mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
      mv.visitCode();
      mv.visitVarInsn(ALOAD, 0);
      mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
      mv.visitInsn(RETURN);
      mv.visitMaxs(1, 1);
      mv.visitEnd();
    }
    {
      mv = cw.visitMethod(ACC_PUBLIC, "m", "(Z)V", null, null);
      mv.visitCode();
      mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
      mv.visitVarInsn(ILOAD, 1);
      mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Z)V", false);
      mv.visitVarInsn(ILOAD, 1);
      Label l0 = new Label();
      mv.visitJumpInsn(IFEQ, l0);
      mv.visitVarInsn(ALOAD, 0);
      mv.visitInsn(ICONST_0);
      // Note: Changed from INVOKEVIRTUAL to INVOKESPECIAL.
      mv.visitMethodInsn(
          INVOKESPECIAL, "com/android/tools/r8/graph/invokespecial/TestClass", "m", "(Z)V", false);
      mv.visitLabel(l0);
      mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
      mv.visitInsn(RETURN);
      mv.visitMaxs(2, 2);
      mv.visitEnd();
    }
    cw.visitEnd();

    return cw.toByteArray();
  }
}