Hi, I have been getting a lot of questions lately about which LLVM tree to use for r600g and radeonsi, so I would like to give a summary of the current situation:
++ Plans for the next Mesa release 9.1 (it might also be called 10.0): The r600g and radeonsi drivers for this release will be compatible with LLVM 3.2. However, since the R600 backend was not included in the LLVM 3.2 release, it will be necessary to build LLVM from the master branch of this repo: http://cgit.freedesktop.org/~tstellar/llvm/ The code in this branch is the official LLVM 3.2 release + the R600 backend + bug fixes the backend depends on. The bug fixes that have been applied can be found here: http://people.freedesktop.org/~tstellar/llvm/3.2/bug-fixes/ and at this point all of these patches have also been applied to the upstream LLVM SVN repo. R600 backend development will continue in this branch (with all changes also being pushed upstream to the LLVM SVN repo), until the Mesa codebase branches for the next release. Once this happens, this branch will only be updated with bug fixes and other important changes and the R600 backend development will move to upstream LLVM. ++ Plans for subsequent Mesa releases: The r600g and radeonsi drivers will be compatible with upstream LLVM for all subsequent Mesa releases. I'm planning to volunteer to do official point(bugfix) releases of LLVM to make it easier to sync up stable LLVM and stable Mesa releases. However, I'm still not quite sure how this will work. ++ Information for developers: Be aware that I have recently renamed the backend in my tree from AMDGPU to R600 to keep it in-sync with upstream. I can help rebase or convert patches to the new backend name if needed, but usually all that needs to be done is replace Target/AMDGPU with Target/R600. Also, once you've pulled the rename commit, you may need to run make clean in tools/llvm-config/ and also manually delete the file LibraryDependencies.inc in order for llvm-config to update its library dependencies to include the new R600 libraries. Until Mesa code is branched for the next release, please submit patches based on my tree. I will take care of applying them to my tree and also to the upstream LLVM repo. If you would prefer to apply your own patches to the upstream LLVM repo, please request commit access from the LLVM project and then let me know of your intentions. It would be a good idea anyway for most contributors to get LLVM commit access for when we move development to the upstream LLVM tree. ++ Hope this helps to clarify things. If anyone has any questions or suggestions, let me know. -Tom _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
