RFR: 8325520: Vector loads with offsets incorrectly compiled

[Damon Fenacci]

On Wed, 27 Mar 2024 09:17:28 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

> If I am right that you would have made such a optimization impossible, that probably means that our tests don't have an IR test that cover this case. You would definitely need to add such IR tests, otherwise we don't know if we are getting regressions. You will probably also have to run this patch through performance testing eventually.

I've transformed the tests to add IR tests as well. The issue with them seems to be related with [JDK-8302459](https://bugs.openjdk.org/browse/JDK-8302459) (basically there are some missing cleanups when performing late inlining). So, for now the tests force a cleanup at every step (`-XX:+IncrementalInlineForceCleanup`).

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PR Comment: https://git.openjdk.org/jdk/pull/18347#issuecomment-2044306155