[jdk18u] RFR: 8272493: Suboptimal code generation around Preconditions.checkIndex intrinsic with AVX2

[Tobias Hartmann]

Backport of [JDK-8272493](https://bugs.openjdk.java.net/browse/JDK-8272493). Applies cleanly. Approval is pending.

Thanks,
Tobias

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Commit messages:
 - 8272493: Suboptimal code generation around Preconditions.checkIndex intrinsic with AVX2

Changes: https://git.openjdk.java.net/jdk18u/pull/61/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=61&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272493
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/61.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/61/head:pull/61

PR: https://git.openjdk.java.net/jdk18u/pull/61