[jdk11u-dev] RFR: 8275326: C2: assert(no_dead_loop) failed: dead loop detected

[Goetz Lindenmaier]

I backport this for parity with 11.0.15-oracle.

-------------

Commit messages:
 - Backport 70d5dffb4e7110902b59b56efaef31614916148c

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/772/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=772&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8275326
  Stats: 16 lines in 1 file changed: 8 ins; 3 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/772.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/772/head:pull/772

PR: https://git.openjdk.java.net/jdk11u-dev/pull/772