RFR: 8320379: C2: Sort spilling/unspilling sequence for better ld/st merging into ldp/stp on AArch64

[Fei Gao]

On Thu, 23 Nov 2023 15:34:24 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> This is a good idea, although the real-world gains are small. I'd wonder if this was worth doing for non-AArch64 ports, although even on others sorting the accesses into order might help.
>
>> Hi @theRealAph , thanks a lot for your review! All comments have been resolved in the new commit.
>> 
>> > This is a good idea, although the real-world gains are small. I'd wonder if this was worth doing for non-AArch64 ports, although even on others sorting the accesses into order might help.
>> 
>> Yeah, that's also bothering me. I'm not sure if it benefits other ports. Do you think if we need convert the change to aarch64-only? Thanks.
> 
> #ifdefs are probably wrose, so I'd leave it as it is. We need another reviewer.

@theRealAph thanks for your review!

May I have another review? Maybe @vnkozlov? Thanks.

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PR Comment: https://git.openjdk.org/jdk/pull/16754#issuecomment-1827227091