RFR: 8288445: AArch64: C2 compilation fails with guarantee(!true || (true && (shift != 0))) failed: impossible encoding [v3]

[Dean Long]

> The range for aarch64 vector right-shift is 1 to the element width.  This issue fixes the problem in the back-end.  There is a separate problem in the front-end that shift by 0 is not always optimized out.

Dean Long has updated the pull request incrementally with one additional commit since the last revision:

  remove unneeded lines

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

Changes:
  - all: https://git.openjdk.org/jdk19/pull/40/files
  - new: https://git.openjdk.org/jdk19/pull/40/files/e432a308..0f927ce7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk19&pr=40&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk19&pr=40&range=01-02

  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk19/pull/40.diff
  Fetch: git fetch https://git.openjdk.org/jdk19 pull/40/head:pull/40

PR: https://git.openjdk.org/jdk19/pull/40