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

[Dmitry Chuyko]

On Thu, 13 Feb 2025 10:04:10 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> 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.

Yes.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23152#discussion_r1954202897