RFR: 8310577: Fix -Wconversion warnings in interpreter and oops [v2]

[Frederic Parain]

On Thu, 22 Jun 2023 14:19:16 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Please review this change that's mostly casts and a few int type narrowing changes.  The casts are for size calculations between two addresses within the same area so can be int and are never going to be 64 bit.
>> I didn't change CompileThreshold to be 'int' because SA and JVMCI code expects it to be intx.  Maybe that should change though.
>> Tested with tier1 on Oracle platforms, and tier1-4 linux and windows x64.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fred's suggestion.

Marked as reviewed by fparain (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/14604#pullrequestreview-1493338853