jdk/test/hotspot/jtreg/compiler/ccp/TestCmpUMonotonicity.java

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 */
package compiler.ccp;

/*
 * @test
 * @bug 8375653
 * @summary Test that CmpUNode::sub conforms monotonicity
 *
 * @run main ${test.main.class}
 * @run main/othervm -Xbatch -XX:CompileCommand=compileonly,${test.main.class}::test* ${test.main.class}
 */
public class TestCmpUMonotonicity {
    public static void main(String[] args) {
        for (int i = 0; i < 20000; i++) {
            testInt(true, 1, 100, 2);
            testInt(false, 1, 100, 2);
            testLong(true, 1, 100, 2);
            testLong(false, 1, 100, 2);
        }
    }

    private static int testInt(boolean b, int start, int limit, int step) {
        int v2 = b ? 1 : -1;
        int v1 = 0;
        for (int i = start; i < limit; i *= step) {
            if (Integer.compareUnsigned(v1, v2) < 0) {
                v1 = 2;
            } else {
                v1 = 0;
            }
        }
        return v1;
    }

    private static long testLong(boolean b, int start, int limit, int step) {
        long v2 = b ? 1 : -1;
        long v1 = 0;
        for (int i = start; i < limit; i *= step) {
            if (Long.compareUnsigned(v1, v2) < 0) {
                v1 = 2;
            } else {
                v1 = 0;
            }
        }
        return v1;
    }
}