RFR: 8302673: [SuperWord] MaxReduction and MinReduction should vectorize for int

[Jatin Bhateja]

This bugfix patch bypasses couple of canonicalizing ideal transformations for MaxI/MinI IR nodes to prevent breaking reduction chain.

Kindly review.

Best Regards,
Jatin

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Commit messages:
 - 8302673: [SuperWord] MaxReduction and MinReduction should vectorize for int

Changes: https://git.openjdk.org/jdk/pull/13260/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13260&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8302673
  Stats: 124 lines in 3 files changed: 120 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/13260.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13260/head:pull/13260

PR: https://git.openjdk.org/jdk/pull/13260