[jdk19u] RFR: 8295268: Optimized builds are broken due to incorrect assert_is_rfp shortcuts

[Aleksey Shipilev]

Clean backport to unbreak optimized builds on some platforms.

Additional testing:
 - [x] Linux arm `optimized` build

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Commit messages:
 - Backport e7a964b4dbbdd21eba87dc94eb3680e9553f5039

Changes: https://git.openjdk.org/jdk19u/pull/50/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk19u&pr=50&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295268
  Stats: 5 lines in 5 files changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk19u/pull/50.diff
  Fetch: git fetch https://git.openjdk.org/jdk19u pull/50/head:pull/50

PR: https://git.openjdk.org/jdk19u/pull/50