RFR: 8329194: Cleanup Type::cmp definition and usage

[Jasmine Karthikeyan]

On Thu, 28 Mar 2024 15:13:48 GMT, Jasmine Karthikeyan <jkarthikeyan at openjdk.org> wrote:

> Hi all, this patch aims to cleanup `Type::cmp` by changing it from returning a `0` when types are equal and `1` when they are not, to it returning a boolean denoting equality. This makes its usages at various callsites more intuitive. However, as it is passed to the type dictionary as a comparator, a lambda is needed to map the boolean to a comparison value. 
> 
> I was also considering changing the name to `Type::equals` as it's not really returning a comparison value anymore, but I felt it would be too similar to `Type::eq`. If this would be preferred though, I can change it.
> 
> Tier 1 testing passes on my machine. Reviews and thoughts would be appreciated!

Great, thank you for the review and testing!

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PR Comment: https://git.openjdk.org/jdk/pull/18533#issuecomment-2051826574