1 /*
   2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 
  26 package org.graalvm.compiler.core.test;
  27 
  28 import org.junit.Test;
  29 import org.objectweb.asm.ClassWriter;
  30 import org.objectweb.asm.MethodVisitor;
  31 import org.objectweb.asm.Label;
  32 
  33 import jdk.vm.ci.meta.ResolvedJavaMethod;
  34 
  35 public class TwoSlotMarkerClearingTest extends CustomizedBytecodePatternTest {
  36 
  37     @Test
  38     public void testTwoSlotMarkerClearing() throws ClassNotFoundException {
  39         Class<?> testClass = getClass("Test");
  40         ResolvedJavaMethod t1 = getResolvedJavaMethod(testClass, "t1");
  41         parseForCompile(t1);
  42         ResolvedJavaMethod t2 = getResolvedJavaMethod(testClass, "t2");
  43         parseForCompile(t2);
  44     }
  45 
  46     @Override
  47     protected byte[] generateClass(String className) {
  48         ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
  49         cw.visit(52, ACC_SUPER | ACC_PUBLIC, className, null, "java/lang/Object", null);
  50 
  51         String getDescriptor = "(" + "JII" + ")" + "I";
  52         MethodVisitor t1 = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "t1", getDescriptor, null, null);
  53         t1.visitCode();
  54         t1.visitVarInsn(ILOAD, 2);
  55         t1.visitVarInsn(ISTORE, 0);
  56         t1.visitVarInsn(ILOAD, 0);
  57         Label label = new Label();
  58         t1.visitJumpInsn(IFGE, label);
  59         t1.visitVarInsn(ILOAD, 0);
  60         t1.visitInsn(IRETURN);
  61         t1.visitLabel(label);
  62         t1.visitVarInsn(ILOAD, 3);
  63         t1.visitInsn(IRETURN);
  64         t1.visitMaxs(4, 1);
  65         t1.visitEnd();
  66 
  67         getDescriptor = "(" + "IJIJ" + ")" + "J";
  68         MethodVisitor t2 = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "t2", getDescriptor, null, null);
  69         t2.visitCode();
  70         t2.visitVarInsn(LLOAD, 1);
  71         t2.visitVarInsn(LSTORE, 0);
  72         t2.visitVarInsn(ILOAD, 3);
  73         Label label1 = new Label();
  74         t2.visitJumpInsn(IFGE, label1);
  75         t2.visitVarInsn(LLOAD, 0);
  76         t2.visitInsn(LRETURN);
  77         t2.visitLabel(label1);
  78         t2.visitVarInsn(LLOAD, 4);
  79         t2.visitInsn(LRETURN);
  80         t2.visitMaxs(6, 2);
  81         t2.visitEnd();
  82 
  83         cw.visitEnd();
  84         return cw.toByteArray();
  85     }
  86 }