RFR: 8347917: AArch64: Enable upper GPR registers in C1 [v4]

[Andrew Haley]

On Thu, 13 Feb 2025 10:01:16 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> Dmitry Chuyko has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Accurate caller-saved regs definition
>
> src/hotspot/share/c1/c1_Compiler.cpp line 54:
> 
>> 52:   BufferBlob* buffer_blob = CompilerThread::current()->get_buffer_blob();
>> 53:   FrameMap::initialize();
>> 54:   Runtime1::initialize(buffer_blob);
> 
> Why this change?

Ah, I guess it's becuase you refer to `FrameMap::caller_save_cpu_reg_at(i)` in your code.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23152#discussion_r1954200390