(module
 (type $0 (func))
 (memory $0 0)
 (func $a (type $0)
  (if
   (i32.const 1)
   (block $label$0
    (unreachable)
   )
  )
 )
 (func $b (type $0)
  (if
   (i32.const 1)
   (block $label$0
    (unreachable)
   )
   (block $label$1
    (unreachable)
   )
  )
 )
 (func $a-block (type $0)
  (block $label$0
   (if
    (i32.const 1)
    (block $label$1
     (unreachable)
    )
   )
  )
 )
 (func $b-block (type $0)
  (block $label$0
   (if
    (i32.const 1)
    (block $label$1
     (unreachable)
    )
    (block $label$2
     (unreachable)
    )
   )
  )
 )
 (func $a-prepost (type $0)
  (block $label$0
   (nop)
   (if
    (i32.const 1)
    (block $label$1
     (unreachable)
    )
   )
   (nop)
  )
 )
 (func $b-prepost (type $0)
  (block $label$0
   (nop)
   (if
    (i32.const 1)
    (block $label$1
     (unreachable)
    )
    (block $label$2
     (unreachable)
    )
   )
  )
 )
 (func $a-block-prepost (type $0)
  (block $label$0
   (nop)
   (block $label$1
    (if
     (i32.const 1)
     (block $label$2
      (unreachable)
     )
    )
   )
   (nop)
  )
 )
 (func $b-block-prepost (type $0)
  (block $label$0
   (nop)
   (block $label$1
    (if
     (i32.const 1)
     (block $label$2
      (unreachable)
     )
     (block $label$3
      (unreachable)
     )
    )
   )
  )
 )
 (func $recurse (type $0)
  (block $label$0
   (nop)
   (block $label$1
    (nop)
    (br $label$1)
   )
   (nop)
  )
 )
 (func $recurse-b (type $0)
  (block $label$0
   (nop)
   (block $label$1
    (nop)
    (br $label$0)
   )
  )
 )
)