[jdk21u-dev] RFR: 8335860: compiler/vectorization/TestFloat16VectorConvChain.java fails with non-standard AVX/SSE settings [v2]

[Goetz Lindenmaier]

> I backport this to fix test failures caused by backport of JDK-8333890.
> 
> Omitted change to ProblemList as test is not ProblemListed in 21.
> 
> Further I add an additon to the IR framework from https://bugs.openjdk.org/browse/JDK-8318683 that is required by this change. 
> JDK-8318683 is not a candidate for backport, as the change causing this is an enhancement in 22.

Goetz Lindenmaier has updated the pull request incrementally with one additional commit since the last revision:

  Part of 8318683

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

Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/1588/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/1588/files/56d0822c..fc6de271

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1588&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1588&range=00-01

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1588.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1588/head:pull/1588

PR: https://git.openjdk.org/jdk21u-dev/pull/1588