Review: Indify String Concat JEP

[Aleksey Shipilev]

Hi,

I recently sent the review request to compiler-dev@ [1], but got no
response. Resending at corelibs-dev@ to gain more exposure.

Please review the submitted "Indify String Concat" JEP. It seems
complete to me: with working implementation, testing, and general
understanding of an issue. Start here:
  https://bugs.openjdk.java.net/browse/JDK-8085796

General feedback, comments, concerns, testing is appreciated.

Thanks,
-Aleksey

[1]
http://mail.openjdk.java.net/pipermail/compiler-dev/2015-September/009785.html