On 16.11.2016 19:38, Marek Olšák wrote:
Patches 1-10 are random improvements.
Patches 11-14 are cleanups.
Patches 15-20 add support for optimized shader variants compiled
asynchronously (without stalling rendering).
The following optimizations are implemented for the shader variants:
- If user clipping is disabled, clip distances and the gl_ClipVertex
code is removed from vertex shaders.
- All VS outputs not read by a PS are removed. All VS code that
computes those including vertex attribute loads is removed
automatically by dead-code elimination.
- If GL_RASTERIZER_DISCARD is set, all varyings are removed from
vertex shaders.
- If doing depth-only rendering, it has the same behavior for
vertex shaders as GL_RASTERIZER_DISCARD.
It's all about optimizing vertex shaders and VS output resources.
I've just realized I might have to limit the compilation of optimized
shader variants to only a limited number of threads, so that apps
aren't slowed down by this.
I hope this is just the beginning of many things we can do with
asynchronous compilation.
This is very cool stuff and the patches look good to me.
However, for better testing please add debug flags 'noopt' and
'forceopt' (or something like that), where noopt disables all async
optimized variants and forceopt always waits for the optimized variants,
so we can run piglit with forceopt enabled for additional testing.
With that in mind, patches 15 - 20 are also:
Reviewed-by: Nicolai Hähnle <nicolai.haeh...@amd.com>
Please review.
Marek
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