RFR: 8360000: RISC-V: implement aot [v2]

[Fei Yang]

On Mon, 14 Jul 2025 10:25:30 GMT, Hamlin Li <mli at openjdk.org> wrote:

>> src/hotspot/cpu/riscv/macroAssembler_riscv.cpp line 800:
>> 
>>> 798:   push_reg(RegSet::of(t1, xmethod), sp);   // push << t1 & xmethod >> to sp
>>> 799:   movptr(t1, RuntimeAddress(entry_point), t0);
>>> 800:   jalr(t1);
>> 
>> This movptr + jalr sequence could be further simplified into `rt_call(entry_point)`, which could help save one add instruction.
>
> Not sure if I understand your suggestion right.
> If we use `rt_call` here, it will only call into `movptr1`, whose instructions is one longer than `movptr2`.

Ah, yes. I think you are right.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26101#discussion_r2206144302