RFR: 8342393: Promote commutative vector IR node sharing [v13]

[Jatin Bhateja]

> Patch promotes the sharing of commutative vector IR with the same inputs but different input ordering.
> Unlike scalar IR where we perform edge swapping by [sorting inputs](https://github.com/openjdk/jdk/blob/master/src/hotspot/share/opto/addnode.cpp#L122) based on node indices during IR idealization, for vector IR we chose a simpler approach to decorate commutative operations with a special node-level flag during IR construction thus
> obviating any dependency on explicit idealization routines. This flag is later used during GVN hashing to enable node sharing.  
> 
> Following are the performance stats for JMH micro included with the patch.
> 
> 
> Granite Rapids (P-core Xeon Server)
> Baseline : 
> Benchmark                                                                (size)   Mode  Cnt      Score   Error   Units
> VectorCommutativeOperSharingBenchmark.commutativeByteOperationShairing     1024  thrpt    2   8982.549          ops/ms
> VectorCommutativeOperSharingBenchmark.commutativeIntOperationShairing      1024  thrpt    2   6072.773          ops/ms
> VectorCommutativeOperSharingBenchmark.commutativeLongOperationShairing     1024  thrpt    2   2368.856          ops/ms
> VectorCommutativeOperSharingBenchmark.commutativeShortOperationShairing    1024  thrpt    2  15215.087          ops/ms
> 
> Withopt:
> Benchmark                                                                (size)   Mode  Cnt      Score   Error   Units
> VectorCommutativeOperSharingBenchmark.commutativeByteOperationShairing     1024  thrpt    2  11963.554          ops/ms
> VectorCommutativeOperSharingBenchmark.commutativeIntOperationShairing      1024  thrpt    2   7036.088          ops/ms
> VectorCommutativeOperSharingBenchmark.commutativeLongOperationShairing     1024  thrpt    2   2906.731          ops/ms
> VectorCommutativeOperSharingBenchmark.commutativeShortOperationShairing    1024  thrpt    2  17148.131          ops/ms
> 
> Sierra Forest (E-core Xeon Server)
> Baseline:
> Benchmark                                                                (size)   Mode  Cnt     Score   Error   Units
> VectorCommutativeOperSharingBenchmark.commutativeByteOperationShairing     1024  thrpt    2  2444.359          ops/ms
> VectorCommutativeOperSharingBenchmark.commutativeIntOperationShairing      1024  thrpt    2  1710.256          ops/ms
> VectorCommutativeOperSharingBenchmark.commutativeLongOperationShairing     1024  thrpt    2   308.766          ops/ms
> VectorCommutativeOperSharingBenchmark.commutativeShortOperationShairing    1024  thrpt    ...

Jatin Bhateja has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 11 additional commits since the last revision:

 - Merge branch 'master' of http://github.com/openjdk/jdk into JDK-8342393
 - Review suggestions incorporated.
 - Adding functional verification to test points using Verify.checkEQ
 - Review suggestions incorporated
 - Generalizing vector size constraints covering different AVX levels and KNLSetting
 - GHA fix
 - Review comments resolutions.
 - removing spaces
 - Adding functional and performance tests
 - Merge branch 'master' of http://github.com/openjdk/jdk into JDK-8342393
 - ... and 1 more: https://git.openjdk.org/jdk/compare/7f8f263b...f21e30f1

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/22863/files
  - new: https://git.openjdk.org/jdk/pull/22863/files/a5c35a9d..f21e30f1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22863&range=12
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22863&range=11-12

  Stats: 52085 lines in 3070 files changed: 19712 ins; 21103 del; 11270 mod
  Patch: https://git.openjdk.org/jdk/pull/22863.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22863/head:pull/22863

PR: https://git.openjdk.org/jdk/pull/22863