[jdk21u-dev] RFR: 8361892: AArch64: Incorrect matching rule leading to improper oop instruction encoding [v2]

[Zhaokun Xie]

> Hi all,
> 
> This pull request contains a backport of commit [dccb1782](https://github.com/openjdk/jdk/commit/dccb1782ec35d1ee95220a237aef29ddfc292cbd) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Yadong Wang on 22 Jul 2025 and was reviewed by Aleksey Shipilev and Andrew Dinn.
> 
> Thanks!

Zhaokun Xie has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'openjdk:master' into master
 - 8361892: AArch64: Incorrect matching rule leading to improper oop instruction encoding
   
   Backport-of: e22b34ad83596eb9886d4140de8509b37ce2dc9c

-------------

Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/2108/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/2108/files/c6bc668d..647398d7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2108&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2108&range=00-01

  Stats: 2929 lines in 61 files changed: 2756 ins; 111 del; 62 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2108.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2108/head:pull/2108

PR: https://git.openjdk.org/jdk21u-dev/pull/2108