1 /*
   2  * Copyright (c) 2016, 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  * @bug 6700100 8156760
  27  * @summary small instance clone as loads/stores
  28  * @library /
  29  *
  30  * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
  31  *                   -XX:CompileCommand=dontinline,compiler.arraycopy.TestInstanceCloneAsLoadsStores::m*
  32  *                   compiler.arraycopy.TestInstanceCloneAsLoadsStores
  33  * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
  34  *                   -XX:CompileCommand=dontinline,compiler.arraycopy.TestInstanceCloneAsLoadsStores::m*
  35  *                   -XX:+IgnoreUnrecognizedVMOptions -XX:+StressArrayCopyMacroNode
  36  *                   compiler.arraycopy.TestInstanceCloneAsLoadsStores
  37  * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
  38  *                   -XX:CompileCommand=dontinline,compiler.arraycopy.TestInstanceCloneAsLoadsStores::m*
  39  *                   -XX:+IgnoreUnrecognizedVMOptions -XX:-ReduceInitialCardMarks
  40  *                   compiler.arraycopy.TestInstanceCloneAsLoadsStores
  41  */
  42 
  43 package compiler.arraycopy;
  44 
  45 public class TestInstanceCloneAsLoadsStores extends TestInstanceCloneUtils {
  46 
  47     // Should be compiled as loads/stores
  48     static Object m1(D src) throws CloneNotSupportedException {
  49         return src.clone();
  50     }
  51 
  52     // Should be compiled as adds of src (dest allocation eliminated)
  53     static int m2(D src) throws CloneNotSupportedException {
  54         D dest = (D)src.clone();
  55         return dest.i1 + dest.i2 + ((int)dest.i3) + dest.i4 + dest.i5;
  56     }
  57 
  58     // Should be compiled as arraycopy stub call (object too large)
  59     static int m3(E src) throws CloneNotSupportedException {
  60         E dest = (E)src.clone();
  61         return dest.i1 + dest.i2 + dest.i3 + dest.i4 + dest.i5 +
  62             dest.i6 + dest.i7 + dest.i8 + dest.i9;
  63     }
  64 
  65     // Need profiling on src's type to be able to know number of
  66     // fields. Cannot clone as loads/stores if compile doesn't use it.
  67     static Object m4(A src) throws CloneNotSupportedException {
  68         return src.clone();
  69     }
  70 
  71     // Same as above but should optimize out dest allocation
  72     static int m5(A src) throws CloneNotSupportedException {
  73         A dest = (A)src.clone();
  74         return dest.i1 + dest.i2 + dest.i3 + dest.i4 + dest.i5;
  75     }
  76 
  77     // Check that if we have no fields to clone we do fine
  78     static Object m6(F src) throws CloneNotSupportedException {
  79         return src.clone();
  80     }
  81 
  82     // With virtual call to clone: clone inlined from profling which
  83     // gives us exact type of src so we can clone it with
  84     // loads/stores.
  85     static G m7(G src) throws CloneNotSupportedException {
  86         return (G)src.myclone();
  87     }
  88 
  89     // Virtual call to clone but single target: exact type unknown,
  90     // clone intrinsic uses profiling to determine exact type and
  91     // clone with loads/stores.
  92     static J m8(J src) throws CloneNotSupportedException {
  93         return (J)src.myclone();
  94     }
  95 
  96     public static void main(String[] args) throws Exception {
  97 
  98         TestInstanceCloneAsLoadsStores test = new TestInstanceCloneAsLoadsStores();
  99 
 100         test.doTest(d, "m1");
 101         test.doTest(d, "m2");
 102         test.doTest(e, "m3");
 103         test.doTest(a, "m4");
 104         test.doTest(a, "m5");
 105         test.doTest(f, "m6");
 106         test.doTest(g, "m7");
 107         test.doTest(k, "m8");
 108 
 109         if (!test.success) {
 110             throw new RuntimeException("some tests failed");
 111         }
 112 
 113     }
 114 }