[jdk25u] RFR: 8365841: RISC-V: Several IR verification tests fail after JDK-8350960 without Zvfh [v2]

[Dingli Zhang]

> Hi all,
> 
> This pull request contains a backport of commit [2e06a917](https://github.com/openjdk/jdk/commit/2e06a917659d76fa1b4c63f38894564679209625) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Dingli Zhang on 21 Aug 2025 and was reviewed by Fei Yang, Feilong Jiang and Hamlin Li.
> 
> Thanks!

Dingli Zhang 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 remote-tracking branch 'upstream/master' into backport-DingliZhang-2e06a917-master
 - Backport 2e06a917659d76fa1b4c63f38894564679209625

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

Changes:
  - all: https://git.openjdk.org/jdk25u/pull/122/files
  - new: https://git.openjdk.org/jdk25u/pull/122/files/aad81753..0caa5f90

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk25u&pr=122&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk25u&pr=122&range=00-01

  Stats: 178 lines in 21 files changed: 123 ins; 13 del; 42 mod
  Patch: https://git.openjdk.org/jdk25u/pull/122.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/122/head:pull/122

PR: https://git.openjdk.org/jdk25u/pull/122