(module
 (type $0 (func))
 (func $contrast
  (local $x i32)
  (local $y i32)
  (local $z i32)
  (local $a i32)
  (local $b i32)
  (local.set $x
   (i32.const 1)
  )
  (if
   (local.get $x)
   (then
    (nop)
   )
  )
  (if
   (local.get $x)
   (then
    (nop)
   )
  )
  (nop)
  (drop
   (if (result i32)
    (i32.const 2)
    (then
     (i32.const 3)
    )
    (else
     (i32.const 4)
    )
   )
  )
  (nop)
  (drop
   (block (result i32)
    (i32.const 5)
   )
  )
  (if
   (i32.const 6)
   (then
    (local.set $a
     (i32.const 7)
    )
   )
   (else
    (local.set $a
     (i32.const 8)
    )
   )
  )
  (drop
   (local.get $a)
  )
  (block $val
   (if
    (i32.const 10)
    (then
     (local.set $b
      (i32.const 11)
     )
     (br $val)
    )
   )
   (local.set $b
    (i32.const 12)
   )
  )
  (drop
   (local.get $b)
  )
 )
)