[jdk17u-dev] RFR: 8276064: CheckCastPP with raw oop input floats below a safepoint

[Goetz Lindenmaier]

I backport this for parity with 17.0.7-oracle.

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Commit messages:
 - Backport cd9c688bfce36e4b2d37dd68dd8031f197b9eddc

Changes: https://git.openjdk.org/jdk17u-dev/pull/1028/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1028&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8276064
  Stats: 154 lines in 4 files changed: 146 ins; 4 del; 4 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1028.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/1028/head:pull/1028

PR: https://git.openjdk.org/jdk17u-dev/pull/1028