Integrated: Cleanups, TODOs, asserts (part 2)

[Aleksey Shipilev]

On Tue, 11 Apr 2023 15:00:19 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> I have been reading the openjdk/shenandoah vs openjdk/jdk diff and these are the simple code massages we can do to improve and bullet-proof the code, hopefully without changing the semantics. This would continue with more parts later.
> 
> Additional testing:
>  - [x] macos-aarch64-server-fastdebug (some pre-existing failures)
>  - [x] GHA builds

This pull request has now been integrated.

Changeset: 9f256a5a
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.org/shenandoah/commit/9f256a5ac31e943b6c3781e36559b812c4dd6201
Stats:     758 lines in 24 files changed: 296 ins; 280 del; 182 mod

Cleanups, TODOs, asserts (part 2)

Reviewed-by: ysr, kdnilsen

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PR: https://git.openjdk.org/shenandoah/pull/252