RFR: 8277882: New subnode ideal optimization: converting "c0 - (x + c1)" into "(c0 - c1) - x" [v5]

[Dean Long]

On Thu, 2 Dec 2021 02:38:09 GMT, Zang, Zhiqiang <duke at openjdk.java.net> wrote:

>> Suggest two new optimizations that can be done in SubINode::Ideal.
>
> Zang, Zhiqiang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   address comments from code review.

Do you want to make the same change to SubLNode for completeness, and adds tests for "long" like you did for "int"?
If so, then you might find the refactoring that Roland is doing in 8262341 useful.

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PR: https://git.openjdk.java.net/jdk/pull/6441