RFR: 8313249: Fix -Wconversion warnings in verifier code

Fri Jul 28 18:00:43 UTC 2023

On Thu, 27 Jul 2023 15:51:01 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> See bugid for comments.  Most of the verifier code deals with ints, so the u2 and other parameters weren't really needed and can be promoted to int. Mostly types are changed, but a few checked_cast<>s are added.
> Tested with tier1-4, sanity Oracle platforms.

Looks good to me!

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Marked as reviewed by matsaave (Committer).

PR Review: https://git.openjdk.org/jdk/pull/15056#pullrequestreview-1552666500