I'm not conviced this will help that much for Intel GPUs. Developers from Intel have been optimizing shader compilers specifically for Dota 2 for some time without much impact on performance.
Dota 2 is probably memory bandwidth limited on Intel/Linux/OpenGL and that is likely the case for other games too.
So maybe modifying the OpenGL part of the game engine a bit to take memory bandwidth constraints of Intel GPUs into account would help more.
When I was looking into the issue of Intel GPU peformance on Linux many months ago there were no tools to profile memory bandwidth bottlenecks.
Dota 2 is probably memory bandwidth limited on Intel/Linux/OpenGL and that is likely the case for other games too.
So maybe modifying the OpenGL part of the game engine a bit to take memory bandwidth constraints of Intel GPUs into account would help more.
When I was looking into the issue of Intel GPU peformance on Linux many months ago there were no tools to profile memory bandwidth bottlenecks.