RFR: 8310332: Fix -Wconversion warnings in MethodData

[Coleen Phillimore]

On Tue, 20 Jun 2023 12:29:17 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> Please review this change to narrow parameter and return types to avoid implicit casts, add casts where obvious, add checked_cast<> where not obvious and changed the size of a couple parameters to not cast to the smaller size.
> I didn't change TypeProfileWidth and BciProfileWidth because jvmci and SA care about the sizes.
> Tested tier1 all Oracle supported platforms, and tier1-4 linux + windows x64.

Thank you Andrew.  I tried to only use narrowing casts where they're obviously correct because checked_cast<> comes with its own set of problems (and my builds seem to be getting slower).  Thanks for reviewing.

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PR Comment: https://git.openjdk.org/jdk/pull/14557#issuecomment-1598764398