[jdk17u-dev] RFR: 8281122: [IR Framework] Cleanup IR matching code in preparation for JDK-8280378

Thu Dec 29 10:09:29 UTC 2022

I backport this for parity with 17.0.7-oracle.

Clean except for omitting the patch to TestMaskedMacroLogicVector.java.
That test came with  "8273322: Enhance macro logic optimization for masked logic operations." which is not backported.

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Commit messages:
 - Backport 2da677793f562236d473afe12b5c941f25f41377

Changes: https://git.openjdk.org/jdk17u-dev/pull/995/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=995&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8281122
  Stats: 3589 lines in 56 files changed: 2756 ins; 766 del; 67 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/995.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/995/head:pull/995

PR: https://git.openjdk.org/jdk17u-dev/pull/995