RFR: 8263582: WB_IsMethodCompilable ignores compiler directives [v2]

[Christian Hagedorn]

On Thu, 25 Mar 2021 17:19:13 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Christian Hagedorn has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   fix typo
>
> src/hotspot/share/prims/whitebox.cpp line 869:
> 
>> 867:     // Both compilers could have ExcludeOption set. Check all combinations.
>> 868:     bool excluded_c1 = is_excluded_for_compiler(CompileBroker::compiler1(), mh);
>> 869:     bool excluded_c2 = is_excluded_for_compiler(CompileBroker::compiler2(), mh);
> 
> May be use next instead as we do in `WhiteBox::compile_method` at line #992:
>  *comp = CompileBroker::compiler(comp_level);```

The problem is that `CompileBroker::compiler()` returns `NULL` for `CompLevel_any`. And even if it returned one compiler, I also need to check the other one to decide if the method is completly non-compilable. That's why I added this additional logic for `CompLevel_any`.

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PR: https://git.openjdk.java.net/jdk/pull/3195