On 21 August 2014 19:10, Henri Verbeet <hverb...@gmail.com> wrote: > On 21 August 2014 04:56, Michel Dänzer <mic...@daenzer.net> wrote: >> On 21.08.2014 04:29, Henri Verbeet wrote: >>> For whatever it's worth, I have been avoiding radeonsi in part because >>> of the LLVM dependency. Some of the other issues already mentioned >>> aside, I also think it makes it just painful to do bisects over >>> moderate/longer periods of time. >> >> More painful, sure, but not too bad IME. In particular, if you know the >> regression is in Mesa, you can always use a stable release of LLVM for >> the bisect. You only need to change the --with-llvm-prefix= parameter to >> Mesa's configure for that. Of course, it could still be mildly painful >> if you need to go so far back that the current stable LLVM release >> wasn't supported yet. But how often does that happen? Very rarely for me. >> > Sure, it's not impossible, but is that really the kind of process you > want users to go through when bisecting a regression? Perhaps throw in > building 32-bit versions of both Mesa and LLVM on 64-bit as well if > they want to run 32-bit applications. > >> Without LLVM, I'm not sure there would be a driver you could avoid. :) >> > R600g didn't really exist either, and that one seems to have worked > out fine. I think in a large part because of work done by Jerome and > Dave in the early days, but regardless. From what I've seen from SI, I > don't think radeonsi needed to be a separate driver to start with, and > while its ISA is certainly different from R600-Cayman, it doesn't > particularly strike me as much harder to work with. > > Back to the more immediate topic though, I think think that on > occasion the discussion is framed as "Is there any reason using LLVM > IR wouldn't work?", while it would perhaps be more appropriate to > think of as "Would using LLVM IR provide enough advantages to justify > adding a LLVM dependency to core Mesa?".
Could we use an llvm compatible IR? is also a question I'd like to see answered. Dave. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
