RFR: 8287794: Reverse*VNode::Identity problem [v5]

[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 incrementally with one additional commit since the last revision:

  8287794: Separating out SVE related test point since currently VM sve feature is enabled based on CPU feature check even if UseSVE=0.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9623/files
  - new: https://git.openjdk.org/jdk/pull/9623/files/6c2d5a4f..969b4771

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9623&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9623&range=03-04

  Stats: 227 lines in 2 files changed: 139 ins; 60 del; 28 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