hotspot/test/compiler/codegen/LoadWithMask2.java
author iveresov
Tue, 21 Jan 2014 20:05:28 -0800
changeset 22513 dc47bc8ecb75
child 26916 8a1deee4f9b4
permissions -rw-r--r--
8031743: C2: loadI2L_immI broken for negative memory values Summary: Restrict loadI2L_imm optimizations to positive values of mask Reviewed-by: kvn, dlong
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/*
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 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @bug 8031743
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 * @summary loadI2L_immI broken for negative memory values
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 * @run main/othervm -server -Xbatch -XX:-TieredCompilation -XX:CompileCommand=compileonly,*.foo* LoadWithMask2
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 *
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 */
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public class LoadWithMask2 {
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  static int x;
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  static long foo1() {
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    return x & 0xfffffffe;
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  }
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  static long foo2() {
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    return x & 0xff000000;
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  }
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  static long foo3() {
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    return x & 0x8abcdef1;
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  }
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  public static void main(String[] args) {
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    x = -1;
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    long l = 0;
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    for (int i = 0; i < 100000; ++i) {
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      l = foo1() & foo2() & foo3();
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    }
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    if (l > 0) {
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      System.out.println("FAILED");
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      System.exit(97);
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    }
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    System.out.println("PASSED");
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  }
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}