RFR: 8251462: Remove legacy compilation policy [v3]

[Igor Veresov]

On Fri, 22 Jan 2021 00:24:34 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Igor Veresov has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix another s390 compilation failure
>
> src/hotspot/share/compiler/compileBroker.cpp line 972:
> 
>> 970: 
>> 971:   // Initialize the compilation queue
>> 972:   if (_c2_count > 0) {
> 
> Is ZERO treated as `is_interpreter_only()` ? How this change works with ZERO?

I forgot why I removed that. Let me put it back and run it through testing again.

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PR: https://git.openjdk.java.net/jdk/pull/1985