Integrated: 8343122: RISC-V: C2: Small improvement for real runtime callouts

[Fei Yang]

On Mon, 28 Oct 2024 04:39:17 GMT, Fei Yang <fyang at openjdk.org> wrote:

> Hi, please review this small improvement.
> 
> Currently, we do 11 instructions for real C2 runtime callouts (See riscv_enc_java_to_runtime).
> Seems we can materialize the pointer faster with `movptr2`, which will help reduce 2 instructions.
> But we will need to reorder the original calling sequence a bit to make `t0` available for `movptr2`.
> 
> Testing on linux-riscv64 platform:
> - [x] tier1-tier3 (release)
> - [x] hotspot:tier1 (fastdebug)

This pull request has now been integrated.

Changeset: cbda7580
Author:    Fei Yang <fyang at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/cbda758010c22b0c1b9aec16004d4bfd24ab5c81
Stats:     11 lines in 1 file changed: 4 ins; 2 del; 5 mod

8343122: RISC-V: C2: Small improvement for real runtime callouts

Reviewed-by: rehn, fjiang

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PR: https://git.openjdk.org/jdk/pull/21733