[jdk17u-dev] RFR: 8290082: [PPC64] ZGC C2 load barrier stub needs to preserve vector registers [v2]

[Martin Doerr]

> Backport of JDK-8290082.

Martin Doerr 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 one additional commit since the last revision:

  Backport 393dc7ade716485f4452d0185caf9e630e4c6139

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Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/547/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/547/files/fd598d56..9ba423e5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=547&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=547&range=00-01

  Stats: 796 lines in 16 files changed: 57 ins; 707 del; 32 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/547.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/547/head:pull/547

PR: https://git.openjdk.org/jdk17u-dev/pull/547