[jdk18u] RFR: 8280476: [macOS] : hotspot arm64 bug exposed by latest clang

Tue Apr 12 08:24:18 UTC 2022

Hi all,

This pull request contains a backport of [JDK-8280476](https://bugs.openjdk.java.net/browse/JDK-8280476), commit [f5d6fddc](https://github.com/openjdk/jdk/commit/f5d6fddc6df8c5c5456a2544b131833d5227292b) from the [openjdk/jdk](https://git.openjdk.java.net/jdk) repository.

The commit being backported was authored by Daniel D. Daugherty on 4 Feb 2022 and was reviewed by Kim Barrett and Andrew Dinn.

This fixes potential UB when using latest versions of XCode.

Thanks!

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Commit messages:
 - Backport f5d6fddc6df8c5c5456a2544b131833d5227292b

Changes: https://git.openjdk.java.net/jdk18u/pull/99/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=99&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8280476
  Stats: 11 lines in 1 file changed: 10 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/99.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/99/head:pull/99

PR: https://git.openjdk.java.net/jdk18u/pull/99