view test/compiler/5091921/Test6992759.java @ 4181:319860ae697a

Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
author Christian Wimmer <Christian.Wimmer@Oracle.com>
date Mon, 02 Jan 2012 14:16:08 -0800
parents bad7ecd0b6ed
children 514efad5e81a
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/*
 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

/**
 * @test
 * @bug 6992759
 * @summary Bad code generated for integer <= comparison, fails for Integer.MAX_VALUE
 *
 * @run main Test6992759
 */

public class Test6992759 {

    static final int N_TESTS = 1000000000;

    public static void main(String[] args) throws Exception {

        /*
         * If MAX_VALUE is changed to MAX_VALUE - 1 below, the test passes
         * because (apparently) bad code is only generated when comparing
         * <= MAX_VALUE in the doTest method.
         */
        Test6992759 test = new Test6992759();
        for (int i = 0; i < N_TESTS; i += 1) {
            test.doTest(10, Integer.MAX_VALUE, i);
            //test.doTest(10, Integer.MAX_VALUE - 1, i);
        }
        System.out.println("No failure");
    }

    void doTest(int expected, int max, int i) {
        int counted;
        for (counted = 0;
             (counted <= max) && (counted < expected);
             counted += 1) {
        }
        if (counted != expected) {
            throw new RuntimeException("Failed test iteration=" + i +
                                       " max=" + max +
                                       " counted=" + counted +
                                       " expected=" + expected);
        }
    }
}