A few months ago I reported on
Intel's Windows driver beginning to use IGC and there was even an internal prototype for Mesa. In speaking with Lisa, that IGC work for Mesa is advancing. In adapting their ANV Vulkan driver to use IGC rather than their internal Intel Mesa compiler is yielding promising performance results that appear to be measurably faster than the current compiler. Intel is also looking at using IGC for their Iris Gallium3D OpenGL driver too but the Vulkan driver is understandably the immediate focus. Right now on Linux the Intel Graphics Compiler is just used by their OpenCL/Level-Zero compute stack.
While providing faster performance and more code re-use across platforms, there are implications though on Intel's Mesa drivers using IGC: the Intel Graphics Compiler would be a new build dependency for Mesa and Linux distributions would need to begin packaging it, adding to additional size on the image. The Intel IGC core binary comes in at roughly an additional 30MB to be squeezed on Linux desktop ISOs.
