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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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/*
 * @test
 * @bug 8357105
 * @summary Test stacked string concatenations where the toString result
 *          of the first StringBuilder chain is wired into an uncommon trap
 *          located in the second one.
 * @run main/othervm compiler.stringopts.TestStackedConcatsAppendUncommonTrap
 * @run main/othervm -XX:-TieredCompilation -Xbatch
 *                   -XX:CompileOnly=compiler.stringopts.TestStackedConcatsAppendUncommonTrap::*
 *                   compiler.stringopts.TestStackedConcatsAppendUncommonTrap
 */

package compiler.stringopts;

public class TestStackedConcatsAppendUncommonTrap {

    public static void main (String... args) {
        for (int i = 0; i < 10000; i++) {
            String s = f(" ");
            if (!s.equals("    ")) {
                throw new RuntimeException("wrong result.");
            }
        }
    }

    static String f(String c) {
        String s = " ";
        s = new StringBuilder().append(s).append(s).toString();
        s = new StringBuilder().append(s).append(s == c ? s : "  ").toString();
        return s;
    }
}