As said, other vendors might offer similar listings inside their binaries. Those listings are quite easy to find in the binary when opening it with a normal text editor and the syntax is quite straight forward if you know your way around shaders and general assembly programming principles. At least on NVidia hardware (maybe others, too, but I wouldn't know) this binary blob also contains ASCII assembly listings of all the contained shaders in NVidia-extended ARB syntax (continuously refined in the GL_NV_gpu_programX extensions).
There are a few extensions that might help you get that information, though, albeit in a not entirely intuitive or even platform-dependent way (but well, you're talking about micro-optimizations, so we're firmly in platform-dependent territory anyway).įirst of all, there's GL_ARB_get_program_binary (core since 4.1), which let's you retrieve a platform-dependent binary version of the program (after linking). There is really no actual notion of "GLSL assembly code", or not one that's remotely vendor-independent, let alone a way to retrieve that. In unextended OpenGL that's indeed a little difficult, if possible at all.
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