RFR: 8350753: Deprecate UseCompressedClassPointers [v2]

[Thomas Stuefe]

On Mon, 7 Apr 2025 06:19:37 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Thomas Stuefe has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
>> 
>>  - Merge branch 'openjdk:master' into JDK-8350753-Deprecate-UseCompressedClassPointers
>>  - not on 32-bit
>>  - Deprecate UseCompressedClassPointers
>
> src/hotspot/share/runtime/arguments.cpp line 532:
> 
>> 530:   { "CreateMinidumpOnCrash",        JDK_Version::jdk(9),  JDK_Version::undefined(), JDK_Version::undefined() },
>> 531: #ifdef _LP64
>> 532:   // Note: on 32-bit, the option is not available; therefore a deprecation notice makes no sense.
> 
> No need for the comment - the ifdef tells you this is something only for 64-bit

I initially thought a casual reader may interpret the ifdef as "the option is still accepted on 32-bit" - to know otherwise, one has to read globals.hpp. But I am fine with removing the comment.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24436#discussion_r2030892614