ecc495ac39
This removes unused closure branches in the principled BSDF code using the Material flags. On top of this, use constants for weights to use compiler dead code eliminitation for unused branches when there is different variants of the principled BSDF node used. Finally, remove Gbuffer packing cases that are not present inside the nodetree. Testing with the same setup as #145347: | | main (ms) | PR (ms) | Delta (ms) | | -------- | ----------- | ------------ |------------ | | Nvidia | 174 | 132 (1.31x) | 42 | | Mesa AMD | 191 | 170 (1.12x) | 21 | Barbershop compilation time is almost equal because it is not using the principled BSDF. Rel #145347 Pull Request: https://projects.blender.org/blender/blender/pulls/146324
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