RFR: 8364409: [BACKOUT] 8350988: Consolidate Identity of self-inverse operations

Thu Jul 31 09:43:30 UTC 2025

This reverts commit 66b5dba (review #23851). Unfortunately, it does not back out cleanly due to a `ReverseBytesNode` base class introduced in #24382, which was easily resolved by using the new base class.

Testing:
 - [ ] Github Actions
 - [ ] tier1 - tier3 plus some internal testing

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Commit messages:
 - Revert "8350988: Consolidate Identity of self-inverse operations"

Changes: https://git.openjdk.org/jdk/pull/26570/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26570&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8364409
  Stats: 245 lines in 4 files changed: 8 ins; 225 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/26570.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26570/head:pull/26570

PR: https://git.openjdk.org/jdk/pull/26570