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/*
 * @test
 * @bug 8336726
 * @summary Test that post-parse call devirtualization works when call does not have an IO projection.
 * @run main/othervm -XX:-TieredCompilation -Xcomp -XX:CompileCommand=compileonly,TestCallDevirtualizationWithInfiniteLoop::test
 *                   TestCallDevirtualizationWithInfiniteLoop
 */

public class TestCallDevirtualizationWithInfiniteLoop {

    static interface I {
        public void method();
    }

    static final class A implements I {
        @Override
        public void method() { };
    }

    static final class B implements I {
        @Override
        public void method() { };
    }

    static final A a = new A();
    static final B b = new B();

    public static void test(boolean flag) {
        // Avoid executing endless loop
        if (flag) {
            return;
        }

        // We only know after loop opts that the receiver type is B.
        I recv = a;
        for (int i = 0; i < 3; ++i) {
            if (i > 1) {
                recv = b;
            }
        }
        // Post-parse call devirtualization will then convert below
        // virtual call to a static call.
        recv.method();

        // Endless loop which does not use IO. As a result the IO
        // projection of the call is removed unexpectedly.
        while (true) { }
    }

    public static void main(String[] args) {
        test(true);
    }
}