AMD glLinkProgram Performance Tips?
I am having trouble with glLinkProgram on AMD drivers (both Windows and Linux). The compilation time is absolutely absurd, and is killing my game engine. I am seeing 5 to 10 seconds for single shader compiles, where on NV drivers it is immeasurable. The shaders in question are generated by the engine and are quite math-heavy.
Does anyone have general tips / advice for speeding up shader compilation on AMD? For example, should I try hand-unrolling heavily nested function calls, perhaps hand-unrolling, loops, etc? Given my lack of knowledge about shader compilers, I don't really know how to proceed with making my shaders more compiler-friendly.
Thanks for any tips!