The GlassyMesa driver is an enhanced Mesa driver for Intel GPUs. The shader pipeline utilizes LLVM via LunarGLASS and a new adapter to the existing Intel Mesa backend. Significant portions of the Intel Mesa backend scheduler and register allocator have been rewritten as well. This driver also includes multithreaded shader compilation and shader caching to improve startup speeds. More information on this project is available from http://www.LunarG.com