MSAA Support Lands For R600 LLVM Back-End

Multi-sample anti-aliasing (MSAA) support has landed for AMD's R600 GPU LLVM back-end for their open-source Linux graphics drivers.

The R600 Gallium3D driver with its default back-end has already supported MSAA, but now for the LLVM back-end that's needed for GPGPU/OpenCL support and mandated for "RadeonSI" (HD 7000/8000 series) graphics support, there is now handling for multi-sample anti-aliasing.

Aside from the Mesa patch for R600 LLVM MSAA, there's also an LLVM change that was committed today to add a new intrinsic needed for MSAA in the R600 back-end.

This support will be part of Mesa 9.3/Mesa 10.0 when that is released in November while the LLVM change will be found in LLVM 3.4 to be released around December.