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

[Goetz Lindenmaier]

> 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

-------------

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/2035/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/2035/files/1a7414e9..2dab157f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2035&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2035&range=02-03

  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2035.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2035/head:pull/2035

PR: https://git.openjdk.org/jdk17u-dev/pull/2035