Returns a set of all global variables which are statically accessed
by the control flow graph from the current entry point.
Only variables which change the interface for a shader are returned, that is,
variables with storage class of Input, Output, Uniform, UniformConstant, PushConstant and AtomicCounter
storage classes are returned.
To use the returned set as the filter for which variables are used during compilation,
this set can be moved to setEnabledInterfaceVariables().
Returns a set of all global variables which are statically accessed by the control flow graph from the current entry point. Only variables which change the interface for a shader are returned, that is, variables with storage class of Input, Output, Uniform, UniformConstant, PushConstant and AtomicCounter storage classes are returned.
To use the returned set as the filter for which variables are used during compilation, this set can be moved to setEnabledInterfaceVariables().