RFR: 8340141: C1: rework ciMethod::equals following 8338471

[Dean Long]

On Tue, 1 Oct 2024 21:26:41 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> @dean-long, may be I misunderstand your statement. Are you re-writing the fix or keep current?
>
> I like @vnkozlov suggestion to null out `cha_monomorphic_target`. Moreover, the validation can be performed inside `ciMethod::find_monomorphic_target()` which is used to compute `cha_monomorphic_target`.

Thanks @iwanowww.
@vnkozlov , please take another look when you get a chance.

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PR Comment: https://git.openjdk.org/jdk/pull/21148#issuecomment-2513225983