[jdk21u-dev] RFR: 8323274: C2: array load may float above range check

[Martin Doerr]

Backport of [JDK-8323274](https://bugs.openjdk.org/browse/JDK-8323274). Recognized as clean. "test/hotspot/jtreg/compiler/rangechecks" tests have passed.

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Commit messages:
 - Backport 4406915ebce4266b3eb4a238382fff3c2c1d1739

Changes: https://git.openjdk.org/jdk21u-dev/pull/727/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=727&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8323274
  Stats: 672 lines in 9 files changed: 668 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/727.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/727/head:pull/727

PR: https://git.openjdk.org/jdk21u-dev/pull/727