RFR: 8342962: [s390x] TestOSRLotsOfLocals.java crashes [v3]

[Amit Kumar]

> We are on thin ice with the `TestOSRLotsOfLocals` test. Before it breaks, I'd like to provide the fix. :-)
> 
> Testing : Tier1 test with fastdebug vm.

Amit Kumar has updated the pull request incrementally with one additional commit since the last revision:

  more comments from lutz

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21703/files
  - new: https://git.openjdk.org/jdk/pull/21703/files/084fac86..cba88536

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21703&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21703&range=01-02

  Stats: 4 lines in 1 file changed: 0 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/21703.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21703/head:pull/21703

PR: https://git.openjdk.org/jdk/pull/21703