Method uses_special_return

cranelift/codegen/src/ir/extfunc.rs:71–73

Does this signature have a return whose `ArgumentPurpose` is `purpose`?

(&self, purpose: ArgumentPurpose)

    /// Does this signature have a return whose `ArgumentPurpose` is `purpose`?
    pub fn uses_special_return(&self, purpose: ArgumentPurpose) -> bool {
        self.special_return_index(purpose).is_some()
    }

    /// How many special parameters does this function have?
    pub fn num_special_params(&self) -> usize {