In891d71a4d4this keyword was dropped due to performance regression afterfdc2962beb, but currently code does not experience this performance degradation, and in fact there is minor performance improvement on Lunar Lake GPUs, along with an expected improvement in compile time. However, this change brings a minor performance regression to shade_surface kernel on Intel Arc and Meteor Lake GPUs, which will be solved later by disabling this keyword for these platforms only. Pull Request: https://projects.blender.org/blender/blender/pulls/130299