TestBeautifyLoops.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 *
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/**
 * @test
 * @bug 8240576
 * @summary JVM crashes after transformation in C2 IdealLoopTree::merge_many_backedges
 *
 * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation
 *      compiler.loopopts.TestBeautifyLoops
 */

package compiler.loopopts;

public class TestBeautifyLoops {
    private int mI = 0;
    private long mJ = 0;
    private float mF = 0f;

    public void testMethod() {
        for (int i0 = 0; i0 < 100; i0++) {
            if (mF != 0) {
                // do nothing
            } else {
                try {
                    mJ = Long.MAX_VALUE;
                    for (int i1 = 0; i1 < 101; i1++) {
                        for (int i2 = 0; i2 < 102; i2++) {
                            mI = new Integer(0x1234);
                        }
                    }
                } catch (Exception ignored) {}
            }
        }
    }

    public static void main(String[] args) {
        TestBeautifyLoops obj = new TestBeautifyLoops();
        obj.testMethod();
    }
}