RFR: JDK-8273914: Indy string concat changes order of operations [v3]

[Aleksey Shipilev]

On Thu, 7 Oct 2021 19:43:40 GMT, Liam Miller-Cushon <cushon at openjdk.org> wrote:

>> Done, thanks
>
> (The `WellKnownTypes` test still only exercises the indy strategies, because it's testing logic that only exists in those strategies.)

But still, we probably want to confirm that `inline` strategy yields the same answer in `WellKnownTypes`? That's my thinking why to test `inline`: that is a baseline.

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PR: https://git.openjdk.java.net/jdk/pull/5844