RFR: 8279607: Existing optimization "~x+1" -> "-x" can be generalized to "~x+c" -> "(c-1)-x". [v2]

[Zhiqiang Zang]

On Tue, 11 Jan 2022 07:16:07 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

> Isn't the same applicable to the corresponding `XoINode` and `XorLNode` optimizations?
> 
> https://github.com/openjdk/jdk/blob/126328cb6218a93d23ed6169d7e52fb2719528ed/src/hotspot/share/opto/addnode.cpp#L877-L883

Great catch, thanks. I included similar transformation for `XorINode` and `XorLNode`.

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PR: https://git.openjdk.java.net/jdk/pull/6858