test/passes/dce_vacuum.txt

(module
 (type $0 (func (result i32)))
 (memory $0 0)
 (func $__Z12serveroptionPc (type $0) (result i32)
  (block $switch$0
   (return
    (i32.const 0)
   )
  )
  (unreachable)
 )
)