RFR: 8278949: Cleanups for 8277850

Sat Dec 18 00:14:29 UTC 2021

On Fri, 17 Dec 2021 08:03:19 GMT, Roland Westrelin <roland at openjdk.org> wrote:

> When 8277850 (C2: optimize mask checks in counted loops) was reviewed,
> John made a number of comments and suggestions after the change was
> integrated. This change includes all of his comments, extra tests to
> cover all cases. I also moved the AndIL_add_shift_and_mask() call in
> AndXNode::Ideal() up so the expression with a non constant mask can be
> optimized as well.

Good.

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Marked as reviewed by kvn (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6876