RFR: 8287738: [PPC64] jdk/incubator/vector/*VectorTests failing [v2]

[Martin Doerr]

> `PopCountVI` needs to handle several types after [JDK-8284960](https://bugs.openjdk.java.net/browse/JDK-8284960).
> (See https://github.com/openjdk/jdk/commit/6f6486e97743eadfb20b4175e1b4b2b05b59a17a.)

Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:

  Support T_LONG instead of T_DOUBLE. Neither of these types are currently used.

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8998/files
  - new: https://git.openjdk.java.net/jdk/pull/8998/files/e439bf3d..b0301536

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8998&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8998&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8998.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8998/head:pull/8998

PR: https://git.openjdk.java.net/jdk/pull/8998