MSL: Pad array elements in Metal argument buffer when shader declares scalar. #2406
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… scalar. A shader may declare and access the first element of a descriptor array as a scalar, which throws off the remaining structure of a Metal Argument Buffer. Add a padding member to the shader Metal argument buffer struct to consume the descriptor elements beyond the first. - CompilerMSL::analyze_argument_buffers(): Track when a descriptor array is declared as a scalar in shader, and add a subsequent member to the Metal argument buffer struct to consume the elements beyond the first. - CompilerMSL::get_resource_array_size(): Ensure variable id is valid.
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A shader may declare and access the first element of a descriptor array as a scalar, which throws off the remaining structure of a Metal Argument Buffer. Add a padding member to the shader Metal argument buffer struct to consume the descriptor elements beyond the first.
CompilerMSL::analyze_argument_buffers(): Track when a descriptor array is declared as a scalar in shader, and add a subsequent member to the Metal argument buffer struct to consume the elements beyond the first.CompilerMSL::get_resource_array_size(): Ensure variable id is valid.