[jdk17u-dev] RFR: 8273454: C2: Transform (-a)*(-b) into a*b [v4]

[Aleksey Shipilev]

On Wed, 13 Dec 2023 12:53:35 GMT, Goetz Lindenmaier <goetz at openjdk.org> wrote:

>> I backport this for parity with 17.0.11-oracle.
>> 
>> This contains follow up fix 8274060: C2: Incorrect computation after JDK-8273454 and a part of JDK-8274130) C2: MulNode::Ideal chained transformations may act on wrong nodes which is already backported, but omitted the part to be applied to this patch.
>> This is also the reason why a clean backport failed.
>
> Goetz Lindenmaier has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Part of 8274130

Yeah, this looks right.

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/jdk17u-dev/pull/2035#pullrequestreview-1779853800