test/hotspot/jtreg/compiler/print/TestPrintInliningLateMHCall.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @bug 8335843
 * @summary C2 hits assert(_print_inlining_stream->size() > 0) failed: missing inlining msg
 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:-BackgroundCompilation -XX:+PrintCompilation -XX:+PrintInlining TestPrintInliningLateMHCall
 */

import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;

public class TestPrintInliningLateMHCall {
    static final MethodHandle mh1;
    static MethodHandle mh2;

    static {
        try {
            MethodHandles.Lookup lookup = MethodHandles.lookup();
            mh1 = lookup.findStatic(TestPrintInliningLateMHCall.class, "lateResolved", MethodType.methodType(void.class));
            mh2 = mh1;
        } catch (NoSuchMethodException | IllegalAccessException e) {
            e.printStackTrace();
            throw new RuntimeException("Method handle lookup failed");
        }
    }

    public static void main(String[] args) throws Throwable {
        for (int i = 0; i < 20_000; i++) {
            testHelper(0);
            testHelper(10);
            test();
        }
    }

    private static void testHelper(int i) throws Throwable {
        MethodHandle mh = null;
        if (i == 10) {
            mh = mh1;
        } else {
            mh = mh2;
        }
        mh.invokeExact();
    }

    private static void test() throws Throwable {
        int i;
        for (i = 0; i < 10; i++) {

        }
        testHelper(i);
    }

    private static void lateResolved() {
        // noop
    }
}