RFR: 8300638: Tier1 IR Test failure after JDK-8298632 on macosx-x64-debug

[Jatin Bhateja]

Patch fixes failing IR verification tests.

CPU feature checks in the IR rules modified appropriately.

Kindly review and approve.

Best Regards,
Jatin

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

Commit messages:
 - 8300638: Tier1 IR Test failure after JDK-8298632 on macosx-x64-debug

Changes: https://git.openjdk.org/jdk/pull/12124/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12124&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300638
  Stats: 53 lines in 13 files changed: 2 ins; 0 del; 51 mod
  Patch: https://git.openjdk.org/jdk/pull/12124.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12124/head:pull/12124

PR: https://git.openjdk.org/jdk/pull/12124