[jdk25] RFR: 8350177: C2 SuperWord: Integer.numberOfLeadingZeros, numberOfTrailingZeros, reverse and bitCount have input types wrongly truncated for byte and short

Mon Jul 14 05:31:53 UTC 2025

Hi all,

This pull request contains a backport of commit [77bd417c](https://github.com/openjdk/jdk/commit/77bd417c9990f57525257d9df89b9df4d7991461) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Jasmine Karthikeyan on 13 Jul 2025 and was reviewed by Emanuel Peter and Tobias Hartmann.

Thanks!

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Commit messages:
 - Backport 77bd417c9990f57525257d9df89b9df4d7991461

Changes: https://git.openjdk.org/jdk/pull/26286/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26286&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8350177
  Stats: 464 lines in 2 files changed: 460 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/26286.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26286/head:pull/26286

PR: https://git.openjdk.org/jdk/pull/26286