(module
  (memory 0)
  (type $0 (func (param i32 i64)))
  (func $f (type $0) (param $i1 i32) (param $i2 i64)
    (if
      (i32.eqz
        (get_local $i1)
      )
      (drop
        (i32.const 10)
      )
    )
    (if
      (i32.eqz
        (get_local $i1)
      )
      (drop
        (i32.const 11)
      )
      (drop
        (i32.const 12)
      )
    )
    (if
      (i64.eqz
        (get_local $i2)
      )
      (drop
        (i32.const 11)
      )
      (drop
        (i32.const 12)
      )
    )
    (drop
      (i32.eqz
        (i32.gt_s
          (i32.const 1)
          (i32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (i32.ge_s
          (i32.const 1)
          (i32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (i32.lt_s
          (i32.const 1)
          (i32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (i32.le_s
          (i32.const 1)
          (i32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (i32.gt_u
          (i32.const 1)
          (i32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (i32.ge_u
          (i32.const 1)
          (i32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (i32.lt_u
          (i32.const 1)
          (i32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (i32.le_u
          (i32.const 1)
          (i32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (f32.gt
          (f32.const 1)
          (f32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (f32.ge
          (f32.const 1)
          (f32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (f32.lt
          (f32.const 1)
          (f32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (f32.le
          (f32.const 1)
          (f32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (f64.gt
          (f64.const 1)
          (f64.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (f64.ge
          (f64.const 1)
          (f64.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (f64.lt
          (f64.const 1)
          (f64.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (f64.le
          (f64.const 1)
          (f64.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (f32.eq
          (f32.const 1)
          (f32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (f32.ne
          (f32.const 1)
          (f32.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (f64.eq
          (f64.const 1)
          (f64.const 2)
        )
      )
    )
    (drop
      (i32.eqz
        (f64.ne
          (f64.const 1)
          (f64.const 2)
        )
      )
    )
    ;; we handle only 0 in the right position, as we assume a const is there, and don't care about if
    ;; both are consts here (precompute does that, so no need)
    (drop
      (i32.eq
        (i32.const 100)
        (i32.const 0)
      )
    )
    (drop
      (i32.eq
        (i32.const 0)
        (i32.const 100)
      )
    )
    (drop
      (i32.eq
        (i32.const 0)
        (i32.const 0)
      )
    )
    (if
      (i32.eqz
        (i32.eqz
          (i32.const 123)
        )
      )
      (nop)
    )
    (drop
      (select
        (i32.const 101)
        (i32.const 102)
        (i32.eqz
          (get_local $i1)
        )
      )
    )
    (drop
      (select
        (tee_local $i1
          (i32.const 103)
        ) ;; these conflict
        (tee_local $i1
          (i32.const 104)
        )
        (i32.eqz
          (get_local $i1)
        )
      )
    )
    (drop
      (select
        (i32.const 0)
        (i32.const 1)
        (i32.eqz
          (i32.eqz
            (i32.const 2)
          )
        )
      )
    )
  )
  (func $load-store
    (drop (i32.and (i32.load8_s (i32.const 0)) (i32.const 255)))
    (drop (i32.and (i32.load8_u (i32.const 1)) (i32.const 255)))
    (drop (i32.and (i32.load8_s (i32.const 2)) (i32.const 254)))
    (drop (i32.and (i32.load8_u (i32.const 3)) (i32.const 1)))
    (drop (i32.and (i32.load16_s (i32.const 4)) (i32.const 65535)))
    (drop (i32.and (i32.load16_u (i32.const 5)) (i32.const 65535)))
    (drop (i32.and (i32.load16_s (i32.const 6)) (i32.const 65534)))
    (drop (i32.and (i32.load16_u (i32.const 7)) (i32.const 1)))
    ;;
    (i32.store8 (i32.const 8) (i32.and (i32.const -1) (i32.const 255)))
    (i32.store8 (i32.const 9) (i32.and (i32.const -2) (i32.const 254)))
    (i32.store16 (i32.const 10) (i32.and (i32.const -3) (i32.const 65535)))
    (i32.store16 (i32.const 11) (i32.and (i32.const -4) (i32.const 65534)))
    ;;
    (i32.store8 (i32.const 11) (i32.wrap/i64 (i64.const 1)))
    (i32.store16 (i32.const 11) (i32.wrap/i64 (i64.const 2)))
    (i32.store (i32.const 11) (i32.wrap/i64 (i64.const 3)))
  )
  (func $and-neg1
    (drop (i32.and (i32.const 100) (i32.const -1)))
    (drop (i32.and (i32.const 100) (i32.const  1)))
  )
  (func $and-pos1
    (drop (i32.and (i32.eqz (i32.const 1000)) (i32.const 1)))
    (drop (i32.and (i32.const 1) (i32.eqz (i32.const 1000))))
    (drop (i32.and (i32.const 100) (i32.const 1)))
    (drop (i32.and (i32.lt_s (i32.const 2000) (i32.const 3000)) (i32.const 1)))
  )
  (func $canonicalize-binary
    (drop (i32.and (unreachable) (i32.const 1))) ;; ok to reorder
    (drop (i32.and (i32.const 1) (unreachable)))
    (drop (i32.div_s (unreachable) (i32.const 1))) ;; not ok
    (drop (i32.div_s (i32.const 1) (unreachable)))
  )
  (func $ne0 (result i32)
    (if (i32.ne (call $ne0) (i32.const 0))
      (nop)
    )
    (if (i32.ne (i32.const 0) (call $ne0))
      (nop)
    )
    ;; through an or
    (if
      (i32.or
        (i32.ne (i32.const 0) (call $ne0))
        (i32.ne (i32.const 0) (call $ne0))
      )
      (nop)
    )
    ;; but not an and
    (if
      (i32.and
        (i32.ne (i32.const 0) (call $ne0))
        (i32.ne (i32.const 0) (call $ne0))
      )
      (nop)
    )
    (i32.const 1)
  )
  (func $recurse-bool
    (if
      (if (result i32)
        (i32.const 1)
        (i32.ne (call $ne0) (i32.const 0))
        (i32.ne (call $ne1) (i32.const 0))
      )
      (nop)
    )
    (if
      (block (result i32)
        (nop)
        (i32.ne (call $ne0) (i32.const 0))
      )
      (nop)
    )
  )
  (func $ne1 (result i32)
    (unreachable)
  )
  (func $load-off-2 "load-off-2" (param $0 i32) (result i32)
    (i32.store offset=2
      (i32.add
        (i32.const 1)
        (i32.const 3)
      )
      (get_local $0)
    )
    (i32.store offset=2
      (i32.add
        (i32.const 3)
        (i32.const 1)
      )
      (get_local $0)
    )
    (i32.store offset=2
      (i32.add
        (get_local $0)
        (i32.const 5)
      )
      (get_local $0)
    )
    (i32.store offset=2
      (i32.add
        (i32.const 7)
        (get_local $0)
      )
      (get_local $0)
    )
    (i32.store offset=2
      (i32.add
        (i32.const -11) ;; do not fold this!
        (get_local $0)
      )
      (get_local $0)
    )
    (i32.store offset=2
      (i32.add
        (get_local $0)
        (i32.const -13) ;; do not fold this!
      )
      (get_local $0)
    )
    (i32.store offset=2
      (i32.add
        (i32.const -15)
        (i32.const 17)
      )
      (get_local $0)
    )
    (i32.store offset=2
      (i32.add
        (i32.const -21)
        (i32.const 19)
      )
      (get_local $0)
    )
    (i32.store offset=2
      (i32.const 23)
      (get_local $0)
    )
    (i32.store offset=2
      (i32.const -25)
      (get_local $0)
    )
    (drop
      (i32.load offset=2
        (i32.add
          (i32.const 2)
          (i32.const 4)
        )
      )
    )
    (drop
      (i32.load offset=2
        (i32.add
          (i32.const 4)
          (i32.const 2)
        )
      )
    )
    (drop
      (i32.load offset=2
        (i32.add
          (get_local $0)
          (i32.const 6)
        )
      )
    )
    (drop
      (i32.load offset=2
        (i32.const 8)
      )
    )
    (i32.load offset=2
      (i32.add
        (i32.const 10)
        (get_local $0)
      )
    )
  )
  (func $sign-ext (param $0 i32) (param $1 i32)
    ;; eq of sign-ext to const, can be a zext
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 0)
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 16)
          )
          (i32.const 16)
        )
        (i32.const 0)
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 5) ;; weird size, but still valid
          )
          (i32.const 5)
        )
        (i32.const 0)
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 100) ;; non-zero
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 32767) ;; non-zero and bigger than the mask, with sign bit
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const -149) ;; non-zero and bigger than the mask, without sign bit
      )
    )
    ;; eq of two sign-ext, can both be a zext
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.shr_s
          (i32.shl
            (get_local $1)
            (i32.const 24)
          )
          (i32.const 24)
        )
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 16)
          )
          (i32.const 16)
        )
        (i32.shr_s
          (i32.shl
            (get_local $1)
            (i32.const 16)
          )
          (i32.const 16)
        )
      )
    )
    ;; corner cases we should not opt
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 23) ;; different shift, smaller
        )
        (i32.const 0)
      )
    )
    (drop
      (i32.eq
        (i32.shr_u ;; unsigned
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 0)
      )
    )
    (drop
      (i32.lt_s ;; non-eq
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 0)
      )
    )
  )
  (func $sign-ext-input (param $0 i32) (param $1 i32)
    (drop
      (i32.shr_s
        (i32.shl
          (i32.const 100) ;; small!
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.const 127) ;; just small enough
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.const 128) ;; just too big
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get-local $0) ;; who knows...
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (unreachable) ;; ignore
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.div_s ;; this could be optimizable in theory, but currently we don't look into adds etc.
            (i32.const 1)
            (i32.const 2)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.and ;; takes the min, here it is ok
            (i32.const 127)
            (i32.const 128)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.and ;; takes the min, here it is not
            (i32.const 128)
            (i32.const 129)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.xor ;; takes the max, here it is ok
            (i32.const 127)
            (i32.const 126)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.xor ;; takes the max, here it is not
            (i32.const 127)
            (i32.const 128)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.or ;; takes the max, here it is ok
            (i32.const 127)
            (i32.const 126)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.or ;; takes the max, here it is not
            (i32.const 127)
            (i32.const 128)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shl ;; adds, here it is too much
            (i32.const 32)
            (i32.const 2)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shl ;; adds, here it is ok
            (i32.const 32)
            (i32.const 1)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shl ;; adds, here it is too much and "overflows"
            (i32.const 32)
            (i32.const 35)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_u ;; subtracts, here it is still too much
            (i32.const 256)
            (i32.const 1)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_u ;; subtracts, here it is ok
            (i32.const 256)
            (i32.const 2)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_u ;; subtracts, here it "overflows"
            (i32.const 128)
            (i32.const 35)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_s ;; subtracts, here it is still too much
            (i32.const 256)
            (i32.const 1)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_s ;; subtracts, here it is ok
            (i32.const 256)
            (i32.const 2)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_s ;; subtracts, here it "overflows"
            (i32.const 128)
            (i32.const 35)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_s ;; subtracts, here there is a sign bit, so it stays 32 bits no matter how much we shift
            (i32.const -1)
            (i32.const 32)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_s ;; subtracts, here we mask out that sign bit
            (i32.and
              (i32.const -1)
              (i32.const 2147483647)
            )
            (i32.const 31) ;; adjusted after we fixed shift computation to just look at lower 5 bits
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.ne ;; 1 bit
            (i32.const -1)
            (i32.const -1)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (f32.le
            (f32.const -1)
            (f32.const -1)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.clz ;; assumed 5 bits
            (i32.const 0)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shl
            (i32.clz ;; assumed 5 bits
              (i32.const 0)
            )
            (i32.const 2) ;; + 2, so 7
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shl
            (i32.clz ;; assumed 5 bits
              (i32.const 0)
            )
            (i32.const 3) ;; + 3, so 8, too much
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.wrap/i64 ;; preserves 6
            (i64.clz ;; assumed 6 bits
              (i64.const 0)
            )
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shl
            (i32.wrap/i64 ;; preserves 6
              (i64.clz ;; assumed 6 bits
                (i64.const 0)
              )
            )
            (i32.const 1) ;; + 1, so 7
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shl
            (i32.wrap/i64 ;; preserves 6
              (i64.clz ;; assumed 6 bits
                (i64.const 0)
              )
            )
            (i32.const 2) ;; + 2, so 8, too much
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.eqz ;; 1 bit
            (i32.const -1)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_u
            (i32.wrap/i64 ;; down to 32
              (i64.const -1) ;; 64
            )
            (i32.const 24) ;; 32 - 24 = 8
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_u
            (i32.wrap/i64 ;; down to 32
              (i64.const -1) ;; 64
            )
            (i32.const 25) ;; 32 - 25 = 7, ok
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_u
            (i32.wrap/i64 ;; stay 32
              (i64.extend_s/i32
                (i32.const -1)
              )
            )
            (i32.const 24) ;; 32 - 24 = 8
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_u
            (i32.wrap/i64 ;; stay 32
              (i64.extend_s/i32
                (i32.const -1)
              )
            )
            (i32.const 25) ;; 32 - 25 = 7, ok
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop ;; fuzz testcase
      (i32.shr_s
        (i32.shl
          (i32.xor ;; should be 32 bits
            (i32.le_u ;; 1 bit
              (get_local $0)
              (i32.const 2)
            )
            (get_local $0) ;; unknown, so 32 bits
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
  )
  (func $linear-sums (param $0 i32) (param $1 i32)
    (drop
      (i32.add
        (i32.add
          (get_local $1)
          (i32.const 16)
        )
        (i32.shl
          (i32.add
            (get_local $0)
            (i32.const -1) ;; -16, so cancels out!
          )
          (i32.const 4)
        )
      )
    )
    (drop
      (i32.add
        (i32.add
          (get_local $1)
          (i32.const 20)
        )
        (i32.shl
          (i32.add
            (get_local $0)
            (i32.const -1) ;; -8, so sum is +12
          )
          (i32.const 3)
        )
      )
    )
    (drop
      (i32.add ;; simple sum
        (i32.const 1)
        (i32.const 3)
      )
    )
    (drop
      (i32.add ;; nested sum
        (i32.add
          (i32.const 1)
          (i32.const 3)
        )
        (i32.add
          (i32.const 5)
          (i32.const 9)
        )
      )
    )
    (drop
      (i32.add
        (i32.add
          (i32.const 1)
          (i32.const 3)
        )
        (i32.sub ;; internal sub
          (i32.const 5)
          (i32.const 3)
        )
      )
    )
    (drop
      (i32.sub ;; external sub
        (i32.add
          (i32.const 1)
          (i32.const 3)
        )
        (i32.add
          (i32.const 5)
          (i32.const 3)
        )
      )
    )
    (drop
      (i32.sub ;; external sub
        (i32.add
          (i32.const 1)
          (i32.const 3)
        )
        (i32.sub ;; and also internal sub
          (i32.const 5)
          (i32.const 3)
        )
      )
    )
    (drop
      (i32.add
        (i32.add
          (i32.const 1)
          (i32.const 3)
        )
        (i32.sub ;; negating sub
          (i32.const 0)
          (i32.const 3)
        )
      )
    )
    (drop
      (i32.add
        (i32.sub
          (i32.const 0)
          (i32.sub ;; two negating subs
            (i32.const 0)
            (i32.add
              (i32.const 3)
              (i32.const 20)
            )
          )
        )
        (i32.add
          (i32.const 1)
          (i32.const 2)
        )
      )
    )
    (drop
      (i32.add
        (i32.add
          (i32.const 0)
          (i32.sub ;; one negating sub
            (i32.const 0)
            (i32.add
              (i32.const 3)
              (i32.const 20)
            )
          )
        )
        (i32.add
          (i32.const 1)
          (i32.const 2)
        )
      )
    )
    (drop
      (i32.add
        (i32.shl ;; shifted value
          (i32.const 1)
          (i32.const 3)
        )
        (i32.add
          (i32.const 5)
          (i32.const 9)
        )
      )
    )
    (drop
      (i32.add
        (i32.shl ;; shifted value
          (i32.const 1)
          (get_local $0) ;; but not by const
        )
        (i32.add
          (i32.const 5)
          (i32.const 9)
        )
      )
    )
    (drop
      (i32.add
        (i32.shl ;; shifted nested value
          (i32.sub
            (get_local $1)
            (i32.const 10)
          )
          (i32.const 3)
        )
        (i32.add
          (i32.const 5)
          (i32.const 9)
        )
      )
    )
    (drop
      (i32.add
        (i32.mul ;; multiplied
          (i32.const 10)
          (i32.const 3)
        )
        (i32.add
          (i32.const 5)
          (i32.const 9)
        )
      )
    )
    (drop
      (i32.add
        (i32.mul ;; multiplied by nonconstant - can't recurse
          (i32.const 10)
          (get_local $0)
        )
        (i32.add
          (i32.const 5)
          (i32.const 9)
        )
      )
    )
    (drop
      (i32.add
        (i32.mul ;; nested mul
          (i32.add
            (i32.const 10)
            (get_local $0)
          )
          (i32.const 2)
        )
        (i32.add
          (i32.const 5)
          (i32.const 9)
        )
      )
    )
    (drop
      (i32.add
        (i32.add
          (get_local $0)
          (i32.const 10) ;; cancelled out with the below
        )
        (i32.sub
          (i32.const -5)
          (i32.const 5)
        )
      )
    )
  )
  (func $almost-sign-ext (param $0 i32) (param $0 i32)
    (drop
      (i32.shr_s
        (i32.shl
          (i32.const 100) ;; too big, there is a sign bit, due to the extra shift
          (i32.const 25)
        )
        (i32.const 24) ;; different shift, but larger, so ok to opt if we leave a shift, in theory
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.const 50) ;; small enough, no sign bit
          (i32.const 25)
        )
        (i32.const 24) ;; different shift, but larger, so ok to opt if we leave a shift
      )
    )
  )
  (func $squaring (param $0 i32) (param $1 i32)
    (drop
      (i32.and
        (i32.and
          (get_local $0)
          (i32.const 11)
        )
        (i32.const 200)
      )
    )
    (drop
      (i32.and
        (i32.and
          (get_local $0)
          (i32.const 11)
        )
        (get_local $0) ;; non-const, cannot optimize this!
      )
    )
    (drop
      (i32.and
        (i32.and
          (i32.const 11) ;; flipped order
          (get_local $0)
        )
        (i32.const 200)
      )
    )
    (drop
      (i32.or
        (i32.or
          (get_local $0)
          (i32.const 11)
        )
        (i32.const 200)
      )
    )
    (drop
      (i32.shl
        (i32.shl
          (get_local $0)
          (i32.const 11)
        )
        (i32.const 200)
      )
    )
    (drop
      (i32.shr_s
        (i32.shr_s
          (get_local $0)
          (i32.const 11)
        )
        (i32.const 200)
      )
    )
    (drop
      (i32.shr_u
        (i32.shr_u
          (get_local $0)
          (i32.const 11)
        )
        (i32.const 200)
      )
    )
    (drop
      (i32.shr_u
        (i32.shr_s ;; but do not optimize a mixture or different shifts!
          (get_local $0)
          (i32.const 11)
        )
        (i32.const 200)
      )
    )
  )
  (func $sign-ext-ne (param $0 i32) (param $1 i32)
    ;; ne of sign-ext to const, can be a zext
    (drop
      (i32.ne
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 65000)
      )
    )
    (drop
      (i32.ne
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 64872) ;; no sign bit
      )
    )
    (drop
      (i32.ne
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const -149) ;; no sign bit, not all ones
      )
    )
    (drop
      (i32.ne
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 111)
      )
    )
    (drop
      (i32.ne
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.shr_s
          (i32.shl
            (get_local $1)
            (i32.const 24)
          )
          (i32.const 24)
        )
      )
    )
  )
  (func $sign-ext-eqz (param $0 i32) (param $1 i32)
    (drop
      (i32.eqz
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
      )
    )
  )
  (func $sign-ext-boolean (param $0 i32) (param $1 i32)
    (drop
      (if (result i32)
        (i32.shr_s
          (i32.shl
            (get_local $0)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 100)
        (i32.const 200)
      )
    )
  )
  (func $add-sub-zero (param $0 i32) (param $1 i32)
    (drop
      (i32.add
        (get_local $0)
        (i32.const 0)
      )
    )
    (drop
      (i32.sub
        (get_local $0)
        (i32.const 0)
      )
    )
  )
  (func $store-signext (param $0 i32)
    (i32.store8
      (i32.const 8)
      (i32.shr_s
        (i32.shl
          (get_local $0)
          (i32.const 24) ;; exact size we store, sign-ext of 8 bits
        )
        (i32.const 24)
      )
    )
    (i32.store8
      (i32.const 8)
      (i32.shr_s
        (i32.shl
          (get_local $0)
          (i32.const 25) ;; 7 bits. so the ext can alter a bit we store, do not optimize
        )
        (i32.const 25)
      )
    )
    (i32.store8
      (i32.const 8)
      (i32.shr_s
        (i32.shl
          (get_local $0)
          (i32.const 23) ;; 9 bits, this is good to optimize
        )
        (i32.const 23)
      )
    )
    (i32.store16
      (i32.const 8)
      (i32.shr_s
        (i32.shl
          (get_local $0)
          (i32.const 16) ;; exact size we store, sign-ext of 16 bits
        )
        (i32.const 16)
      )
    )
    (i32.store16
      (i32.const 8)
      (i32.shr_s
        (i32.shl
          (get_local $0)
          (i32.const 17) ;; 15 bits. so the ext can alter a bit we store, do not optimize
        )
        (i32.const 17)
      )
    )
    (i32.store16
      (i32.const 8)
      (i32.shr_s
        (i32.shl
          (get_local $0)
          (i32.const 14) ;; 17 bits, this is good to optimize
        )
        (i32.const 14)
      )
    )
    (i32.store
      (i32.const 8)
      (i32.shr_s
        (i32.shl
          (get_local $0)
          (i32.const 16) ;; 4 bytes stored, do nothing
        )
        (i32.const 16)
      )
    )
    (i32.store
      (i32.const 8)
      (i32.shr_s
        (i32.shl
          (get_local $0)
          (i32.const 8) ;; 4 bytes stored, do nothing
        )
        (i32.const 8)
      )
    )
  )
  (func $sign-ext-tee (param $0 i32) (param $1 i32)
    (drop
      (i32.shr_s
        (i32.shl
          (tee_local $0
            (i32.const 128) ;; too big
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (tee_local $0
            (i32.const 127) ;; just right
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
  )
  (func $sign-ext-load (param $0 i32) (param $1 i32)
    (drop
      (i32.shr_s
        (i32.shl
          (i32.load8_s ;; one byte, so perfect
            (i32.const 256)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_u
            (i32.load8_s ;; one byte, but sexted to 32
              (i32.const 256)
            )
            (i32.const 1)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shr_u
            (i32.load8_u ;; one byte, but reduced to 7
              (i32.const 256)
            )
            (i32.const 1)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.load16_s ;; two, so perfect
            (i32.const 256)
          )
          (i32.const 16)
        )
        (i32.const 16)
      )
    )
    ;; through tees, we cannot alter the load sign
    (drop
      (i32.shr_s
        (i32.shl
          (tee_local $1
            (i32.load8_s
              (i32.const 1)
            )
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (tee_local $1
            (i32.load8_u
              (i32.const 1)
            )
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.and
        (tee_local $1
          (i32.load8_s
            (i32.const 1)
          )
        )
        (i32.const 255)
      )
    )
    (drop
      (i32.and
        (tee_local $1
          (i32.load8_u
            (i32.const 1)
          )
        )
        (i32.const 255)
      )
    )
  )
  (func $mask-bits (param $0 i32) (param $1 i32)
    (drop
      (i32.and
        (tee_local $0
          (i32.const 127) ;; 7 bits
        )
        (i32.const 255) ;; mask 8, so we don't need this
      )
    )
    (drop
      (i32.and
        (tee_local $0
          (i32.const 128) ;; 8 bits
        )
        (i32.const 255) ;; mask 8, so we don't need this
      )
    )
    (drop
      (i32.and
        (tee_local $0
          (i32.const 128)
        )
        (i32.const 254) ;; improper mask, small
      )
    )
    (drop
      (i32.and
        (tee_local $0
          (i32.const 128)
        )
        (i32.const 1279) ;; improper mask, large
      )
    )
    (drop
      (i32.and
        (tee_local $0
          (i32.const 128)
        )
        (i32.const 1290) ;; improper mask, large
      )
    )
    (drop
      (i32.and
        (tee_local $0
          (i32.const 128)
        )
        (i32.const 4095) ;; proper mask, huge
      )
    )
    (drop
      (i32.and
        (tee_local $0
          (i32.const 128)
        )
        (i32.const 511) ;; proper mask, large
      )
    )
    (drop
      (i32.and
        (tee_local $0
          (i32.const 128)
        )
        (i32.const 127) ;; proper mask, just too small
      )
    )
  )
  (func $local-info-zero-ext (param $0 i32) (param $1 i32)
    (local $x i32)
    (local $y i32)
    (local $z i32)
    (local $w i32)
    (set_local $x
      (i32.const 212) ;; mask is unneeded, we are small
    )
    (drop
      (i32.and
        (get_local $x)
        (i32.const 255)
      )
    )
    (set_local $y
      (i32.const 500) ;; mask is needed, we are too big
    )
    (drop
      (i32.and
        (get_local $y)
        (i32.const 255)
      )
    )
    (set_local $0
      (i32.const 212) ;; mask is unneeded, but we are a param, not a var, so no
    )
    (drop
      (i32.and
        (get_local $0)
        (i32.const 255)
      )
    )
    (set_local $z
      (i32.const 212) ;; mask is unneeded, we are small
    )
    (set_local $z
      (i32.const 220) ;; mask is still unneeded even with 2 uses
    )
    (drop
      (i32.and
        (get_local $z)
        (i32.const 255)
      )
    )
    (set_local $w
      (i32.const 212) ;; mask is unneeded, we are small
    )
    (set_local $w
      (i32.const 1000) ;; mask is needed, one use is too big
    )
    (drop
      (i32.and
        (get_local $w)
        (i32.const 255)
      )
    )
  )
  (func $local-info-sign-ext-bitsize (param $0 i32) (param $1 i32)
    (local $x i32)
    (local $y i32)
    (local $z i32)
    (local $w i32)
    (set_local $x
      (i32.const 127) ;; mask is unneeded, we are small
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $x)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (set_local $y
      (i32.const 128) ;; mask is needed, we are too big
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $y)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (set_local $0
      (i32.const 127) ;; mask is unneeded, but we are a param, not a var, so no
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $0)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (set_local $z
      (i32.const 127) ;; mask is unneeded, we are small
    )
    (set_local $z
      (i32.const 100) ;; mask is still unneeded even with 2 uses
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $z)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (set_local $w
      (i32.const 127) ;; mask is unneeded, we are small
    )
    (set_local $w
      (i32.const 150) ;; mask is needed, one use is too big
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $w)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
  )
  (func $local-info-sign-ext-already-exted (param $0 i32) (param $1 i32)
    (local $x i32)
    (local $y i32)
    (local $z i32)
    (local $w i32)
    (set_local $x
      (i32.shr_s
        (i32.shl
          (get_local $0) ;; already sign-exted here, so no need later
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $x)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (set_local $y
      (i32.shr_s
        (i32.shl
          (get_local $0) ;; already sign-exted here, but wrong bit size
          (i32.const 16)
        )
        (i32.const 16)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $y)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (set_local $0
      (i32.shr_s
        (i32.shl
          (get_local $0) ;; already sign-exted here, so no need later, but we are a param
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $0)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (set_local $z
      (i32.shr_s
        (i32.shl
          (get_local $0) ;; already sign-exted here, so no need later
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (set_local $z
      (i32.shr_s
        (i32.shl
          (get_local $1) ;; already sign-exted here, so no need later
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $z)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (set_local $w
      (i32.shr_s
        (i32.shl
          (get_local $0) ;; already sign-exted here, so no need later
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (set_local $w
      (i32.shr_s
        (i32.shl
          (get_local $0) ;; not quite a sign-ext
          (i32.const 23)
        )
        (i32.const 24)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $w)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (drop ;; odd corner case
      (i32.shr_s
        (i32.shl
          (get_local $0) ;; param, so we should know nothing
          (i32.const 24)
        )
        (i32.const 23) ;; different shift, smaller
      )
    )
  )
  (func $signed-loads-fill-the-bits (param $$e i32) (result i32)
    (local $$0 i32)
    (local $$conv i32)
    (set_local $$0
      (i32.load8_s ;; one byte, but 32 bits due to sign-extend
        (i32.const 1024)
      )
    )
    (set_local $$conv
      (i32.and
        (get_local $$0)
        (i32.const 255) ;; so we need this zexting!
      )
    )
    (return
      (i32.eq
        (get_local $$conv)
        (get_local $$e)
      )
    )
  )
  (func $local-info-sign-ext-already-exted-by-load (param $0 i32) (param $1 i32)
    (local $x i32)
    (local $y i32)
    (local $z i32)
    (local $w i32)
    (set_local $x
      (i32.load8_s (i32.const 1024)) ;; 8 bits, sign extended, no need to do it again
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $x)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (set_local $y
      (i32.load8_u (i32.const 1024)) ;; 8 bits, zext, so bad
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $y)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
    (set_local $z
      (i32.load16_s (i32.const 1024)) ;; 16 bits sign-extended, wrong size
    )
    (drop
      (i32.shr_s
        (i32.shl
          (get_local $z)
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
  )
  (func $compare-load-s-sign-extend (param $0 i32) (param $1 i32)
    (drop
      (i32.eq
        (i32.load8_s
          (get_local $0)
        )
        (i32.shr_s
          (i32.shl
            (get_local $1)
            (i32.const 24)
          )
          (i32.const 24)
        )
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $1)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.load8_s
          (get_local $0) ;; flip order, we should canonicalize
        )
      )
    )
    (drop
      (i32.eq
        (i32.load8_u ;; unsigned, bad
          (get_local $0)
        )
        (i32.shr_s
          (i32.shl
            (get_local $1)
            (i32.const 24)
          )
          (i32.const 24)
        )
      )
    )
    (drop
      (i32.eq
        (i32.load8_s
          (get_local $0)
        )
        (i32.shr_s
          (i32.shl
            (get_local $1)
            (i32.const 16) ;; wrong size
          )
          (i32.const 16)
        )
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $1)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.load8_u ;; unsigned, bad
          (get_local $0)
        )
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $1)
            (i32.const 16) ;; wrong size
          )
          (i32.const 16)
        )
        (i32.load8_s
          (get_local $0)
        )
      )
    )
  )
  (func $unsign-diff-sizes (param $x i32) (param $y i32) (result i32)
    (i32.ne
      (i32.shr_s
        (i32.shl
          (call $unsign-diff-sizes
            (i32.const -1)
            (i32.const 5)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
      (i32.shr_s
        (i32.shl
          (call $unsign-diff-sizes
            (i32.const 1)
            (i32.const 2006)
          )
          (i32.const 16)
        )
        (i32.const 16)
      )
    )
  )
  (func $unsign-same-sizes (param $x i32) (param $y i32) (result i32)
    (i32.ne
      (i32.shr_s
        (i32.shl
          (call $unsign-same-sizes
            (i32.const -1)
            (i32.const 5)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
      (i32.shr_s
        (i32.shl
          (call $unsign-same-sizes
            (i32.const 1)
            (i32.const 2006)
          )
          (i32.const 24)
        )
        (i32.const 24)
      )
    )
  )
  (func $fuzz-almost-sign-ext
    (drop
      (i32.shr_s
        (i32.shl
          (i32.load16_u
            (i32.const 2278)
          )
          (i32.const 17)
        )
        (i32.const 16)
      )
    )
    (drop
      (i32.shr_s
        (i32.shl
          (i32.shl
            (i32.load16_u
              (i32.const 2278)
            )
            (i32.const 1)
          )
          (i32.const 16)
        )
        (i32.const 16)
      )
    )
  )
  (func $fuzz-comp-impossible (param $x i32)
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $x)
            (i32.const 16)
          )
          (i32.const 16)
        )
        (i32.const 65535) ;; impossible to be equal, the effective sign bit is set, but not the higher bits, which the sign-ext will set on the non-const value
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $x)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 255)
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $x)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 127) ;; safe
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $x)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 128) ;; unsafe again
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $x)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 4223) ;; more big bits, so sign bit though
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $x)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const 4224) ;; more big bits
      )
    )
    (drop
      (i32.eq
        (i32.shr_s
          (i32.shl
            (get_local $x)
            (i32.const 24)
          )
          (i32.const 24)
        )
        (i32.const -4) ;; safe even with more big bits, as they are all 1s
      )
    )
  )
  (func $if-parallel (param $0 i32) (param $1 i32)
    (drop
      (if (result i32)
        (get_local $0)
        (i32.add (get_local $1) (i32.const 1))
        (i32.add (get_local $1) (i32.const 1))
      )
    )
    (drop
      (if (result i32)
        (tee_local $0 (get_local $1)) ;; side effects!
        (i32.add (get_local $1) (i32.const 1))
        (i32.add (get_local $1) (i32.const 1))
      )
    )
    (drop
      (if (result i32)
        (get_local $0)
        (i32.add (get_local $1) (unreachable)) ;; folding them would change the type of the if
        (i32.add (get_local $1) (unreachable))
      )
    )
    (drop
      (if (result i32)
        (tee_local $0 (get_local $1)) ;; side effects!
        (i32.add (get_local $1) (unreachable)) ;; folding them would change the type of the if
        (i32.add (get_local $1) (unreachable))
      )
    )
    (drop
      (if (result i32)
        (unreachable) ;; !!!
        (i32.add (get_local $1) (unreachable)) ;; folding them would change the type of the if
        (i32.add (get_local $1) (unreachable))
      )
    )
  )
  (func $select-parallel (param $0 i32) (param $1 i32)
    (drop
      (select
        (i32.add (get_local $1) (i32.const 1))
        (i32.add (get_local $1) (i32.const 1))
        (get_local $0)
      )
    )
    (drop
      (select
        (tee_local $0 (get_local $1)) ;; side effects!
        (tee_local $0 (get_local $1)) ;; side effects!
        (get_local $0)
      )
    )
    (drop
      (select
        (i32.add (get_local $1) (i32.const 1))
        (i32.add (get_local $1) (i32.const 1))
        (tee_local $0 (get_local $1)) ;; side effects! (but no interference with values)
      )
    )
    (drop
      (select
        (tee_local $0 (get_local $1)) ;; side effects! interference!
        (tee_local $0 (get_local $1)) ;; side effects! interference!
        (tee_local $0 (get_local $1)) ;; side effects! interference!
      )
    )
    (drop
      (select
        (tee_local $0 (get_local $1)) ;; side effects!
        (tee_local $0 (get_local $1)) ;; side effects!
        (unreachable) ;; side effects! (but no interference with values)
      )
    )
  )
  (func $zero-shifts-is-not-sign-ext
   (drop
    (i32.eq
     (i32.const -5431187)
     (i32.add
      (i32.const 0)
      (i32.shr_s
       (i32.shl
        (i32.load16_s align=1
         (i32.const 790656516)
        )
        (i32.const 0)
       )
       (i32.const 0)
      )
     )
    )
   )
   (drop
    (i32.eq
     (i32.const -5431187)
     (i32.add
      (i32.const 0)
      (i32.shr_s
       (i32.shl
        (i32.load16_s align=1
         (i32.const 790656516)
        )
        (i32.const 1)
       )
       (i32.const 0)
      )
     )
    )
   )
  )
  (func $zero-ops (result i32)
   (return
    (i32.eq
     (i32.const -1337)
     (i32.shr_u
      (i32.add
       (i32.const 0)
       (i32.shr_s
        (i32.shl
         (i32.load16_s align=1
          (i32.const 790656516)
         )
         (i32.const 0)
        )
        (i32.const 0)
       )
      )
      (i32.const 0)
     )
    )
   )
  )
  (func $sign-ext-1-and-ne (result i32)
   (select
    (i32.ne
     (i32.const 1333788672)
     (i32.shr_s
      (i32.shl
       (call $sign-ext-1-and-ne)
       (i32.const 1)
      )
      (i32.const 1)
     )
    )
    (i32.const 2)
    (i32.const 1)
   )
  )
  (func $neg-shifts-and-255 (result i32)
    (i32.and
     (i32.shr_u
      (i32.const -99)
      (i32.const -32) ;; this shift does nothing
     )
     (i32.const 255)
    )
  )
  (func $neg-shifts-and-255-b (result i32)
   (i32.and
    (i32.shl
     (i32.const -2349025)
     (i32.const -32) ;; this shift does nothing
    )
    (i32.const 255)
   )
  )
  (func $shifts-square-overflow (param $x i32) (result i32)
   (i32.shr_u
    (i32.shr_u
     (get_local $x)
     (i32.const 65535) ;; 31 bits effectively
    )
    (i32.const 32767) ;; also 31 bits, so two shifts that force the value into nothing for sure
   )
  )
  (func $shifts-square-no-overflow-small (param $x i32) (result i32)
   (i32.shr_u
    (i32.shr_u
     (get_local $x)
     (i32.const 1031) ;; 7 bits effectively
    )
    (i32.const 4098) ;; 2 bits effectively
   )
  )
  (func $shifts-square-overflow-64 (param $x i64) (result i64)
   (i64.shr_u
    (i64.shr_u
     (get_local $x)
     (i64.const 65535) ;; 63 bits effectively
    )
    (i64.const 64767) ;; also 63 bits, so two shifts that force the value into nothing for sure
   )
  )
  (func $shifts-square-no-overflow-small-64 (param $x i64) (result i64)
   (i64.shr_u
    (i64.shr_u
     (get_local $x)
     (i64.const 1031) ;; 7 bits effectively
    )
    (i64.const 4098) ;; 2 bits effectively
   )
  )
  (func $shifts-square-unreachable (param $x i32) (result i32)
   (i32.shr_u
    (i32.shr_u
     (unreachable)
     (i32.const 1031) ;; 7 bits effectively
    )
    (i32.const 4098) ;; 2 bits effectively
   )
  )
  (func $mix-shifts (result i32)
    (i32.shr_s
     (i32.shl
      (i32.const 23)
      (i32.const -61)
     )
     (i32.const 168)
    )
  )
  (func $actually-no-shifts (result i32)
    (i32.add
      (i32.shl
        (i32.const 23)
        (i32.const 32) ;; really 0
      )
      (i32.const 10)
    )
  )
  (func $less-shifts-than-it-seems (param $x i32) (result i32)
    (i32.add
      (i32.shl
        (i32.const 200)
        (i32.const 36) ;; really 4
      )
      (i32.shl
        (i32.const 100)
        (i32.const 4)
      )
    )
  )
  (func $and-popcount32 (result i32)
    (i32.and
      (i32.popcnt
        (i32.const -1)
      )
      (i32.const 31)
    )
  )
  (func $and-popcount32-big (result i32)
    (i32.and
      (i32.popcnt
        (i32.const -1)
      )
      (i32.const 63)
    )
  )
  (func $and-popcount64 (result i64) ;; these are TODOs
    (i64.and
      (i64.popcnt
        (i64.const -1)
      )
      (i64.const 63)
    )
  )
  (func $and-popcount64-big (result i64)
    (i64.and
      (i64.popcnt
        (i64.const -1)
      )
      (i64.const 127)
    )
  )
  (func $and-popcount64-bigger (result i64)
    (i64.and
      (i64.popcnt
        (i64.const -1)
      )
      (i64.const 255)
    )
  )
)