[15] RFR(T): 8248265: compiler/ciReplay tests fail with AOT compiled java.base

[Tobias Hartmann]

Hi,

please review the following patch:
https://bugs.openjdk.java.net/browse/JDK-8248265
http://cr.openjdk.java.net/~thartmann/8248265/webrev.00/

With AOT compiled java.base, we call the test method EmptyMain::main through
JavaCalls::call_helper(). The fix for JDK-8247832 restored the old behavior that empty methods are
not called: https://hg.openjdk.java.net/jdk/jdk15/rev/94025f9e6a0d#l2.36

As a result, EmptyMain::main is not called and therefore also not compiled. The test fails because
-XX:CICrashAt=1 triggers no VM crash. Empty methods not being called is expected behavior. The test
should use a non-empty method to trigger compilation.

Thanks,
Tobias