RFR: 8348858: [leyden] Bump the default code buffer sizes to store more generated code

[Vladimir Kozlov]

On Wed, 29 Jan 2025 19:00:37 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> src/hotspot/share/opto/output.cpp line 1368:
>> 
>>> 1366:   // the insn section, and should be counted in code_req.
>>> 1367:   BarrierSetC2* bs = BarrierSet::barrier_set()->barrier_set_c2();
>>> 1368:   code_req += bs->estimate_stub_size();
>> 
>> I would be careful with this. I tried this change as part of [JDK-8331253](https://git.openjdk.org/jdk/commit/3383ad6397d5a2d8fb232ffd3e29a54e0b37b686) fix. But then I have to rollback that to avoid regression [JDK-8333226](https://github.com/openjdk/jdk/pull/19531)
>> 
>> It is affecting inlining decision (InlineSmallCode) and have to be handled carefully.
>
> Here is PR for original change: https://github.com/openjdk/jdk/pull/19029

On other hand this line change affects only requested size and not how final instructions section size is calculated. So it could be fine.

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PR Review Comment: https://git.openjdk.org/leyden/pull/28#discussion_r1934430065