RFR: 8304258: x86: Improve the code generation of VectorRearrange with int and float [v2]

[Vladimir Kozlov]

On Wed, 22 Mar 2023 20:22:22 GMT, Quan Anh Mai <qamai at openjdk.org> wrote:

>> Hi,
>> 
>> This small patch changes the code generation of VectorRearrangeNode with respect to int and float elements. With not-larger-than-128-bit vectors, we can use `vpermilps` instead of promoting to operating on the extended 256-bit vector. This also helps the code generation of AVX1 to not rely on the sse version.
>> 
>> Please take a look and leave some reviews.
>> Thanks a lot.
>
> Quan Anh Mai 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 branch 'master' into rearrangeI
>  - improve rearrangeI

My testing tier1-3 (includes incubator/vector) and Xcomp passed.

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PR Comment: https://git.openjdk.org/jdk/pull/13042#issuecomment-1481635377