[vectorIntrinsics] RFR: 8274631: assert(false) failed: bad AD file with -XX:UseKNLSetting [v2]

[Jatin Bhateja]

> - Fix for assertion failure in test/hotspot/jtreg/compiler/vectorapi/VectorMaskCastTest.java crashes during compilation over KNL target.
> - A safety check has been added to prevent intrinsification of VectorMask.cast API if source and destination have incompatible ideal types i.e one is predicate vector type (TypeVectMask) and other a vector type (TypeVect).

Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:

  8274631: Review comment resolution.

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Changes:
  - all: https://git.openjdk.java.net/panama-vector/pull/141/files
  - new: https://git.openjdk.java.net/panama-vector/pull/141/files/4642767f..63103571

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=141&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=141&range=00-01

  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/141.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/141/head:pull/141

PR: https://git.openjdk.java.net/panama-vector/pull/141