RFR: 8307312: Replace "int which" with "int cp_index" in constantPool [v3]

[Coleen Phillimore]

On Mon, 31 Jul 2023 16:46:19 GMT, Matias Saavedra Silva <matsaave at openjdk.org> wrote:

>> Many accessors in the constant pool take an argument "int which" that is meant to represent an ambiguous index. Despite this, several methods in the API use "int which" when the argument is exclusively a constant pool index. This patch aims to rename all of these instances to "int cp_index" in order to be more clear and to distinguish methods that take constant pool indices and methods that use derived indices.
>> 
>> The callers have been updated to use more clear naming as well. Verified with tier 1-5 tests.
>
> Matias Saavedra Silva has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Reverted resolved_constant_at

Thanks for reverting resolve_constant_at_impl.

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Marked as reviewed by coleenp (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/15027#pullrequestreview-1555386484