(module
 (type $none_=>_none (func))
 (func $a
  (if
   (i32.const 1)
   (unreachable)
  )
 )
 (func $b
  (if
   (i32.const 1)
   (unreachable)
   (unreachable)
  )
 )
 (func $a-block
  (block $block
   (if
    (i32.const 1)
    (unreachable)
   )
  )
 )
 (func $b-block
  (block $block
   (if
    (i32.const 1)
    (unreachable)
    (unreachable)
   )
  )
 )
 (func $a-prepost
  (nop)
  (if
   (i32.const 1)
   (unreachable)
  )
  (nop)
 )
 (func $b-prepost
  (nop)
  (if
   (i32.const 1)
   (unreachable)
   (unreachable)
  )
  (nop)
 )
 (func $a-block-prepost
  (nop)
  (block $block
   (if
    (i32.const 1)
    (unreachable)
   )
  )
  (nop)
 )
 (func $b-block-prepost
  (nop)
  (block $block
   (if
    (i32.const 1)
    (unreachable)
    (unreachable)
   )
  )
  (nop)
 )
 (func $recurse
  (block $a
   (nop)
   (block $b
    (nop)
    (br $b)
    (nop)
   )
   (nop)
  )
 )
 (func $recurse-b
  (block $a
   (nop)
   (block $b
    (nop)
    (br $a)
    (nop)
   )
   (nop)
  )
 )
)