[jdk25u-dev] RFR: 8372978: [VectorAPI] Fix incorrect identity values in UMIN/UMAX reductions

[Eric Fang]

Hi all,

This pull request contains a backport of commit 56d7b524 from the openjdk/jdk repository.

The commit being backported was authored by Eric Fang on 14 Jan 2026 and was reviewed by Paul Sandoz, Quan Anh Mai and Xiaohong Gong.

Thanks!

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Commit messages:
 - Backport 56d7b524b3ddb49b985b4e6f061a7128b10cffb5

Changes: https://git.openjdk.org/jdk25u-dev/pull/150/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u-dev&pr=150&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372978
  Stats: 11897 lines in 44 files changed: 6823 ins; 2629 del; 2445 mod
  Patch: https://git.openjdk.org/jdk25u-dev/pull/150.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u-dev.git pull/150/head:pull/150

PR: https://git.openjdk.org/jdk25u-dev/pull/150