abandon all U-types, welcome to L-world (or, what I learned in Burlington)
john.r.rose at oracle.com
Mon Nov 20 00:15:02 UTC 2017
On Nov 19, 2017, at 3:33 PM, forax at univ-mlv.fr wrote:
> but you need a way disambiguate a reference type from a value type at runtime in the interpreter.
> You also nedd to teach JITs to propagate L vs which Q info on local variables for generics specialization (and it works even if the inlining fails because the boxing/wrapping in the thread local storage is done by the adapters so the JITed code doesn't have to be conservative).
Yes, that leads to the sort of tag bot schemes I alluded to. I didn’t want to go into detail because it is a spec. list not a dev. list. On the dev. list we will say more about it. The problems seem solvable especially after the MVT prototyping experience on HotSpot, and I hope the IBM experience corroborates.
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