RFR: 8241503: C2: Share MacroAssembler between mach nodes during code emission [v13]

[Cesar Soares Lucas]

On Wed, 10 Apr 2024 23:53:00 GMT, Cesar Soares Lucas <cslucas at openjdk.org> wrote:

>> # Description
>> 
>> Please review this PR with a patch to re-use the same C2_MacroAssembler object to emit all instructions in the same compilation unit.
>> 
>> Overall, the change is pretty simple. However, due to the renaming of the variable to access C2_MacroAssembler, from `_masm.` to `masm->`, and also some method prototype changes, the patch became quite large.
>> 
>> # Help Needed for Testing
>> 
>> I don't have access to all platforms necessary to test this. I hope some other folks can help with testing on `S390`, `RISC-V` and `PPC`.
>
> Cesar Soares Lucas has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove unused operands in arm.ad

Thank you all for reviewing!!

-------------

PR Comment: https://git.openjdk.org/jdk/pull/16484#issuecomment-2049976529