RFR: 8287794: Reverse*VNode::Identity problem [v3]

[Jatin Bhateja]

> Hi All,
> 
> - This bug fix patch fixes a missing case during reverse[bits|bytes] identity transformation.
> - Unlike AARCH64(SVE), X86(AVX512) ISA has no direct instruction to reverse[bits|bytes] of a vector lane hence a predicated operation is supported through blend instruction.
> - New IR framework based tests has been added to test transforms relevant to AVX2, AVX512 and SVE.
> 
> Kindly review and share your feedback.
> 
> Best Regards,
> Jatin

Jatin Bhateja has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:

 - Merge branch 'master' of http://github.com/openjdk/jdk into JDK-8287794
 - 8287794: Review comments resolved.
 - 8287794: Reverse*VNode::Identity problem

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Changes: https://git.openjdk.org/jdk/pull/9623/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9623&range=02
  Stats: 349 lines in 2 files changed: 322 ins; 25 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/9623.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9623/head:pull/9623

PR: https://git.openjdk.org/jdk/pull/9623