RFR: 8331733: [PPC64] saving and restoring CR is not needed at most places [v5]

[Varada M]

> PPC64 uses save/restore CR less often. Only LR is critical, CR is mainly needed for native-to-Java calls.
> Fastdebug: build and tier1 testing successful. [unrelated failures]

Varada M 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 seven additional commits since the last revision:

 - Merge branch 'master' into LR
 - [PPC64] saving and restoring CR is not needed at most places
 - [PPC64] saving and restoring CR is not needed at most places
 - [PPC64] saving and restoring CR is not needed at most places
 - [PPC64] saving and restoring CR is not needed at most places
 - [PPC64] saving and restoring CR is not needed at most places
 - [PPC64] saving and restoring CR is not needed at most places

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/19494/files
  - new: https://git.openjdk.org/jdk/pull/19494/files/3445e9ac..5938878b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19494&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19494&range=03-04

  Stats: 90827 lines in 1720 files changed: 65308 ins; 17165 del; 8354 mod
  Patch: https://git.openjdk.org/jdk/pull/19494.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19494/head:pull/19494

PR: https://git.openjdk.org/jdk/pull/19494