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 * version 2 for more details (a copy is included in the LICENSE file that

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/*

 * @test TestVerifyStackAfterDeopt

 * @bug 8148871

 * @bug 8209825

 * @summary Checks VerifyStack after deoptimization of array allocation slow call

 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:TieredStopAtLevel=1

 *                   -XX:AllocatePrefetchLines=1 -XX:AllocateInstancePrefetchLines=1 -XX:AllocatePrefetchStepSize=16 -XX:AllocatePrefetchDistance=1

 *                   -XX:MinTLABSize=1k -XX:TLABSize=1k

 *                   -XX:+DeoptimizeALot -XX:+VerifyStack

 *                   compiler.interpreter.TestVerifyStackAfterDeopt

 */

package compiler.interpreter;

public class TestVerifyStackAfterDeopt {

    private long method(long l1, long l2, Object[] a) {

        return l1 + l2;

    }

    private long result[] = new long[1];

    private void test() {

        // For the array allocation, C1 emits a slow call into the runtime

        // that deoptimizes the caller frame due to -XX:+DeoptimizeALot.

        // The VerifyStack code then gets confused because the following

        // bytecode instruction is an invoke and the interpreter oop map

        // generator reports the oop map after execution of that invoke.

        this.result[0] = method(1L, 2L, new Object[0]);

    }

    public static void main(String[] args) {

        TestVerifyStackAfterDeopt t = new TestVerifyStackAfterDeopt();

        // Run long enough for C1 compilation to trigger and TLAB to fill up

        for (int i = 0; i < 100_000; ++i) {

            t.test();

        }

    }

}