1 /*
   2  * Copyright (c) 2018, 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  * @test
  26  * @summary Check constant propagation behavior
  27  * @modules jdk.compiler/com.sun.tools.javac.util jdk.jdeps/com.sun.tools.javap
  28  * @compile ConstantPropagationTest.java
  29  * @run main/othervm -Xverify:none -XX:+EnableValhalla ConstantPropagationTest
  30  * @modules jdk.compiler
  31  */
  32 
  33 import java.io.PrintWriter;
  34 import java.io.StringWriter;
  35 import java.nio.file.Paths;
  36 
  37 public class ConstantPropagationTest {
  38 
  39     static final __ByValue class X {
  40         static final int sfif = 8888;
  41         final int ifif = 9999;
  42         static void foo(X x) {
  43             System.out.println(sfif);
  44             System.out.println(x.ifif);
  45         }
  46     }
  47 
  48     public static void main(String[] args) {
  49         new ConstantPropagationTest().run();
  50     }
  51 
  52     void run() {
  53         String [] params = new String [] { "-v",
  54                                             Paths.get(System.getProperty("test.classes"),
  55                                                 "ConstantPropagationTest$X.class").toString() };
  56         runCheck(params, new String [] {
  57 
  58          "ConstantValue: int 8888",
  59          "3: sipush        8888",
  60          }, new String [] {
  61          "ConstantValue: int 9999"
  62          });
  63 
  64      }
  65 
  66      void runCheck(String [] params, String [] expectedOut, String [] unexpectedOut) {
  67         StringWriter s;
  68         String out;
  69 
  70         try (PrintWriter pw = new PrintWriter(s = new StringWriter())) {
  71             com.sun.tools.javap.Main.run(params, pw);
  72             out = s.toString();
  73         }
  74         int errors = 0;
  75         for (String eo: expectedOut) {
  76             if (!out.contains(eo)) {
  77                 System.err.println("Match not found for string: " + eo);
  78                 errors++;
  79             }
  80         }
  81         for (String eo: unexpectedOut) {
  82             if (out.contains(eo)) {
  83                 System.err.println("Unexpected output found for string: " + eo);
  84                 errors++;
  85             }
  86         }
  87         if (errors > 0) {
  88              throw new AssertionError("Unexpected javap output: " + out);
  89         }
  90     }
  91 }