[jdk17u-dev] RFR: 8273454: C2: Transform (-a)*(-b) into a*b [v3]

[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 refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains two new commits since the last revision:

 - Backport c77ebe88748b0a55f1fc7a5497314a752eab1e2a
 - Backport 7c9868c0b3c9bd3d305e71f91596190813cdccce

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Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/2035/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/2035/files/286a84dd..1a7414e9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2035&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2035&range=01-02

  Stats: 217 lines in 6 files changed: 201 ins; 1 del; 15 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