[jdk17u-dev] RFR: 8338100: C2: assert(!n_loop->is_member(get_loop(lca))) failed: control must not be back in the loop

[Goetz Lindenmaier]

I backport this for parity with 17.0.15-oracle.

Two trivial resolved due to context changes.

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Commit messages:
 - Backport e203df46faf610e35e2c2510271ad68199f4fa3f

Changes: https://git.openjdk.org/jdk17u-dev/pull/3123/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3123&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338100
  Stats: 68 lines in 3 files changed: 18 ins; 31 del; 19 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3123.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3123/head:pull/3123

PR: https://git.openjdk.org/jdk17u-dev/pull/3123