Jaebaek Seo d997c83b10 Add spirv-opt pass to replace descriptor accesses based on variable indices (#4574) ... This commit adds a spirv-opt pass to replace accesses to descriptor array based on variable indices with constant elements. Before: ``` %descriptor = OpVariable %_ptr_array_Image Uniform ... %ac = OpAccessChain %_ptr_Image %descriptor %variable_index (some image instructions using %ac) ``` After: ``` %descriptor = OpVariable %_ptr_array_Image Uniform ... OpSwitch %variable_index 0 %case0 1 %case1 ... ... %case0 = OpLabel %ac = OpAccessChain %_ptr_Image %descriptor %uint_0 ... %case1 = OpLabel %ac = OpAccessChain %_ptr_Image %descriptor %uint_1 ... (use OpPhi for value with concrete type) ```		2021-10-26 17:20:58 -04:00
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spirv-tools	Add spirv-opt pass to replace descriptor accesses based on variable indices (#4574)	2021-10-26 17:20:58 -04:00