test/passes/dce_vacuum.txt

(module
 (type $none_=>_i32 (func (result i32)))
 (type $i64_=>_i64 (func (param i64) (result i64)))
 (type $f32_f32_=>_f32 (func (param f32 f32) (result f32)))
 (func $__Z12serveroptionPc (result i32)
  (return
   (i32.const 0)
  )
 )
 (func $drop-unreachable (param $var$0 f32) (param $var$1 f32) (result f32)
  (unreachable)
 )
 (func $set-unreachable (param $var$0 i64) (result i64)
  (local $var$1 i64)
  (local $var$2 i64)
  (if
   (i64.eq
    (local.get $var$1)
    (i64.const 0)
   )
   (unreachable)
   (unreachable)
  )
 )
)