RFR: JDK-8293978: Duplicate simple loop back-edge will crash the vm [v2]

[王超]

> Duplicate back-edge of the following simple loop will make jvm crash.
> 
> <img width="458" alt="image" src="https://user-images.githubusercontent.com/25214855/190945327-ebce5342-bede-4fad-b940-088753034fa6.png">

王超 has updated the pull request incrementally with one additional commit since the last revision:

  Move the condition ahead

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10329/files
  - new: https://git.openjdk.org/jdk/pull/10329/files/beea2ffb..63fd328e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10329&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10329&range=00-01

  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/10329.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10329/head:pull/10329

PR: https://git.openjdk.org/jdk/pull/10329