RFR: 8336919: Cleanup and rename tags in placeholders code [v4]

[Coleen Phillimore]

On Mon, 29 Jul 2024 12:16:02 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> This change does some renaming of tags, fields and function name (resolve_super_or_fail => resolve_with_circularity_detection) in the Placeholders and SystemDictionary (class loading) code.  resolve_super_or_fail implied that it's always the super class, which it is not, especially with the upcoming changes to valhalla.  Renaming the function to resolve/load and check for circularity error is more accurate. These are changes made by @fparain brought over from the valhalla branch.
>> Tested with tier1-4.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix some comments

Thanks David.  Once this is merged into the Valhalla repo, we'll fix the rest of the comments in that repo.  Edit: I guess I already said this.

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PR Comment: https://git.openjdk.org/jdk/pull/20279#issuecomment-2258874666