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

[Aleksey Shipilev]

Fails on many platforms, for example arm32:

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Commit messages:
 - Fix

Changes: https://git.openjdk.org/jdk/pull/10696/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10696&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/jdk/pull/10696.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10696/head:pull/10696

PR: https://git.openjdk.org/jdk/pull/10696