test/compiler/arguments/TestUseCountTrailingZerosInstructionOnUnsupportedCPU.java

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/**
 * @test
 * @bug 8031321
 * @summary Verify processing of UseCountTrailingZerosInstruction option
 *          on CPU without TZCNT instuction (BMI1 feature) support.
 * @library /testlibrary /testlibrary/whitebox
 * @build TestUseCountTrailingZerosInstructionOnUnsupportedCPU
 *        BMIUnsupportedCPUTest
 * @run main ClassFileInstaller sun.hotspot.WhiteBox
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI
 *                   TestUseCountTrailingZerosInstructionOnUnsupportedCPU
 */

import sun.hotspot.cpuinfo.CPUInfo;
import com.oracle.java.testlibrary.*;
import com.oracle.java.testlibrary.cli.*;

public class TestUseCountTrailingZerosInstructionOnUnsupportedCPU
     extends BMIUnsupportedCPUTest {

    public TestUseCountTrailingZerosInstructionOnUnsupportedCPU() {
        super("UseCountTrailingZerosInstruction", TZCNT_WARNING, "bmi1");
    }

    @Override
    public void unsupportedX86CPUTestCases() throws Throwable {

        super.unsupportedX86CPUTestCases();

        // verify that option will not be turned on during
        // UseBMI1Instuctions processing
        CommandLineOptionTest.
            verifyOptionValue("UseCountTrailingZerosInstruction", "false",
                              "-XX:+UseBMI1Instructions");

        CommandLineOptionTest.
            verifyOptionValue("UseCountTrailingZerosInstruction", "false",
                              "-XX:+UseCountTrailingZerosInstruction",
                              "-XX:+UseBMI1Instructions");
    }

    public static void main(String args[]) throws Throwable {
        new TestUseCountTrailingZerosInstructionOnUnsupportedCPU().test();
    }
}