(module
  ;; Auxiliary
  (func $dummy)
  (table $tab funcref (elem $dummy))
  (memory 1)

  (func (export "select-i32") (param i32 i32 i32) (result i32)
    (select (local.get 0) (local.get 1) (local.get 2))
  )
  (func (export "select-i64") (param i64 i64 i32) (result i64)
    (select (local.get 0) (local.get 1) (local.get 2))
  )
  (func (export "select-f32") (param f32 f32 i32) (result f32)
    (select (local.get 0) (local.get 1) (local.get 2))
  )
  (func (export "select-f64") (param f64 f64 i32) (result f64)
    (select (local.get 0) (local.get 1) (local.get 2))
  )

  (func (export "select-i32-t") (param i32 i32 i32) (result i32)
    (select (result i32) (local.get 0) (local.get 1) (local.get 2))
  )
  (func (export "select-i64-t") (param i64 i64 i32) (result i64)
    (select (result i64) (local.get 0) (local.get 1) (local.get 2))
  )
  (func (export "select-f32-t") (param f32 f32 i32) (result f32)
    (select (result f32) (local.get 0) (local.get 1) (local.get 2))
  )
  (func (export "select-f64-t") (param f64 f64 i32) (result f64)
    (select (result f64) (local.get 0) (local.get 1) (local.get 2))
  )
  (func (export "select-funcref") (param funcref funcref i32) (result funcref)
    (select (result funcref) (local.get 0) (local.get 1) (local.get 2))
  )
  (func (export "select-externref") (param externref externref i32) (result externref)
    (select (result externref) (local.get 0) (local.get 1) (local.get 2))
  )

  (type $t (func))
  (func $tf) (elem declare func $tf)
  (func (export "join-funcnull") (param i32) (result (ref null func))
    (select (result (ref null func))
      (ref.func $tf)
      (ref.null func)
      (local.get 0)
    )
  )

  ;; Check that both sides of the select are evaluated
  (func (export "select-trap-left") (param $cond i32) (result i32)
    (select (unreachable) (i32.const 0) (local.get $cond))
  )
  (func (export "select-trap-right") (param $cond i32) (result i32)
    (select (i32.const 0) (unreachable) (local.get $cond))
  )

  (func (export "select-unreached")
    (unreachable) (select)
    (unreachable) (i32.const 0) (select)
    (unreachable) (i32.const 0) (i32.const 0) (select)
    (unreachable) (i32.const 0) (i32.const 0) (i32.const 0) (select)
    (unreachable) (f32.const 0) (i32.const 0) (select)
    (unreachable)
  )

  (func (export "select_unreached_result_1") (result i32)
    (unreachable) (i32.add (select))
  )

  (func (export "select_unreached_result_2") (result i64)
    (unreachable) (i64.add (select (i64.const 0) (i32.const 0)))
  )


  ;; As the argument of control constructs and instructions

  (func (export "as-select-first") (param i32) (result i32)
    (select (select (i32.const 0) (i32.const 1) (local.get 0)) (i32.const 2) (i32.const 3))
  )
  (func (export "as-select-mid") (param i32) (result i32)
    (select (i32.const 2) (select (i32.const 0) (i32.const 1) (local.get 0)) (i32.const 3))
  )
  (func (export "as-select-last") (param i32) (result i32)
    (select (i32.const 2) (i32.const 3) (select (i32.const 0) (i32.const 1) (local.get 0)))
  )

  (func (export "as-loop-first") (param i32) (result i32)
    (loop (result i32) (select (i32.const 2) (i32.const 3) (local.get 0)) (call $dummy) (call $dummy))
  )
  (func (export "as-loop-mid") (param i32) (result i32)
    (loop (result i32) (call $dummy) (select (i32.const 2) (i32.const 3) (local.get 0)) (call $dummy))
  )
  (func (export "as-loop-last") (param i32) (result i32)
    (loop (result i32) (call $dummy) (call $dummy) (select (i32.const 2) (i32.const 3) (local.get 0)))
  )

  (func (export "as-if-condition") (param i32)
    (select (i32.const 2) (i32.const 3) (local.get 0)) (if (then (call $dummy)))
  )
  (func (export "as-if-then") (param i32) (result i32)
    (if (result i32) (i32.const 1) (then (select (i32.const 2) (i32.const 3) (local.get 0))) (else (i32.const 4)))
  )
  (func (export "as-if-else") (param i32) (result i32)
    (if (result i32) (i32.const 0) (then (i32.const 2)) (else (select (i32.const 2) (i32.const 3) (local.get 0))))
  )

  (func (export "as-br_if-first") (param i32) (result i32)
    (block (result i32) (br_if 0 (select (i32.const 2) (i32.const 3) (local.get 0)) (i32.const 4)))
  )
  (func (export "as-br_if-last") (param i32) (result i32)
    (block (result i32) (br_if 0 (i32.const 2) (select (i32.const 2) (i32.const 3) (local.get 0))))
  )

  (func (export "as-br_table-first") (param i32) (result i32)
    (block (result i32) (select (i32.const 2) (i32.const 3) (local.get 0)) (i32.const 2) (br_table 0 0))
  )
  (func (export "as-br_table-last") (param i32) (result i32)
    (block (result i32) (i32.const 2) (select (i32.const 2) (i32.const 3) (local.get 0)) (br_table 0 0))
  )

  (func $func (param i32 i32) (result i32) (local.get 0))
  (type $check (func (param i32 i32) (result i32)))
  (table $t funcref (elem $func))
  (func (export "as-call_indirect-first") (param i32) (result i32)
    (block (result i32)
      (call_indirect $t (type $check)
        (select (i32.const 2) (i32.const 3) (local.get 0)) (i32.const 1) (i32.const 0)
      )
    )
  )
  (func (export "as-call_indirect-mid") (param i32) (result i32)
    (block (result i32)
      (call_indirect $t (type $check)
        (i32.const 1) (select (i32.const 2) (i32.const 3) (local.get 0)) (i32.const 0)
      )
    )
  )
  (func (export "as-call_indirect-last") (param i32) (result i32)
    (block (result i32)
      (call_indirect $t (type $check)
        (i32.const 1) (i32.const 4) (select (i32.const 2) (i32.const 3) (local.get 0))
      )
    )
  )

  (func (export "as-store-first") (param i32)
    (select (i32.const 0) (i32.const 4) (local.get 0)) (i32.const 1) (i32.store)
  )
  (func (export "as-store-last") (param i32)
    (i32.const 8) (select (i32.const 1) (i32.const 2) (local.get 0)) (i32.store)
  )

  (func (export "as-memory.grow-value") (param i32) (result i32)
    (memory.grow (select (i32.const 1) (i32.const 2) (local.get 0)))
  )

  (func $f (param i32) (result i32) (local.get 0))

  (func (export "as-call-value") (param i32) (result i32)
    (call $f (select (i32.const 1) (i32.const 2) (local.get 0)))
  )
  (func (export "as-return-value") (param i32) (result i32)
    (select (i32.const 1) (i32.const 2) (local.get 0)) (return)
  )
  (func (export "as-drop-operand") (param i32)
    (drop (select (i32.const 1) (i32.const 2) (local.get 0)))
  )
  (func (export "as-br-value") (param i32) (result i32)
    (block (result i32) (br 0 (select (i32.const 1) (i32.const 2) (local.get 0))))
  )
  (func (export "as-local.set-value") (param i32) (result i32)
    (local i32) (local.set 0 (select (i32.const 1) (i32.const 2) (local.get 0))) (local.get 0)
  )
  (func (export "as-local.tee-value") (param i32) (result i32)
    (local.tee 0 (select (i32.const 1) (i32.const 2) (local.get 0)))
  )
  (global $a (mut i32) (i32.const 10))
  (func (export "as-global.set-value") (param i32) (result i32)
    (global.set $a (select (i32.const 1) (i32.const 2) (local.get 0)))
    (global.get $a)
  )
  (func (export "as-load-operand") (param i32) (result i32)
    (i32.load (select (i32.const 0) (i32.const 4) (local.get 0)))
  )

  (func (export "as-unary-operand") (param i32) (result i32)
    (i32.eqz (select (i32.const 0) (i32.const 1) (local.get 0)))
  )
  (func (export "as-binary-operand") (param i32) (result i32)
    (i32.mul
      (select (i32.const 1) (i32.const 2) (local.get 0))
      (select (i32.const 1) (i32.const 2) (local.get 0))
    )
  )
  (func (export "as-test-operand") (param i32) (result i32)
    (block (result i32)
      (i32.eqz (select (i32.const 0) (i32.const 1) (local.get 0)))
    )
  )

  (func (export "as-compare-left") (param i32) (result i32)
    (block (result i32)
      (i32.le_s (select (i32.const 1) (i32.const 2) (local.get 0)) (i32.const 1))
    )
  )
  (func (export "as-compare-right") (param i32) (result i32)
    (block (result i32)
      (i32.ne (i32.const 1) (select (i32.const 0) (i32.const 1) (local.get 0)))
    )
  )

  (func (export "as-convert-operand") (param i32) (result i32)
    (block (result i32)
      (i32.wrap_i64 (select (i64.const 1) (i64.const 0) (local.get 0)))
    )
  )
)

(assert_return (invoke "select-i32" (i32.const 1) (i32.const 2) (i32.const 1)) (i32.const 1))
(assert_return (invoke "select-i64" (i64.const 2) (i64.const 1) (i32.const 1)) (i64.const 2))
(assert_return (invoke "select-f32" (f32.const 1) (f32.const 2) (i32.const 1)) (f32.const 1))
(assert_return (invoke "select-f64" (f64.const 1) (f64.const 2) (i32.const 1)) (f64.const 1))

(assert_return (invoke "select-i32" (i32.const 1) (i32.const 2) (i32.const 0)) (i32.const 2))
(assert_return (invoke "select-i32" (i32.const 2) (i32.const 1) (i32.const 0)) (i32.const 1))
(assert_return (invoke "select-i64" (i64.const 2) (i64.const 1) (i32.const -1)) (i64.const 2))
(assert_return (invoke "select-i64" (i64.const 2) (i64.const 1) (i32.const 0xf0f0f0f0)) (i64.const 2))

(assert_return (invoke "select-f32" (f32.const nan) (f32.const 1) (i32.const 1)) (f32.const nan))
(assert_return (invoke "select-f32" (f32.const nan:0x20304) (f32.const 1) (i32.const 1)) (f32.const nan:0x20304))
(assert_return (invoke "select-f32" (f32.const nan) (f32.const 1) (i32.const 0)) (f32.const 1))
(assert_return (invoke "select-f32" (f32.const nan:0x20304) (f32.const 1) (i32.const 0)) (f32.const 1))
(assert_return (invoke "select-f32" (f32.const 2) (f32.const nan) (i32.const 1)) (f32.const 2))
(assert_return (invoke "select-f32" (f32.const 2) (f32.const nan:0x20304) (i32.const 1)) (f32.const 2))
(assert_return (invoke "select-f32" (f32.const 2) (f32.const nan) (i32.const 0)) (f32.const nan))
(assert_return (invoke "select-f32" (f32.const 2) (f32.const nan:0x20304) (i32.const 0)) (f32.const nan:0x20304))

(assert_return (invoke "select-f64" (f64.const nan) (f64.const 1) (i32.const 1)) (f64.const nan))
(assert_return (invoke "select-f64" (f64.const nan:0x20304) (f64.const 1) (i32.const 1)) (f64.const nan:0x20304))
(assert_return (invoke "select-f64" (f64.const nan) (f64.const 1) (i32.const 0)) (f64.const 1))
(assert_return (invoke "select-f64" (f64.const nan:0x20304) (f64.const 1) (i32.const 0)) (f64.const 1))
(assert_return (invoke "select-f64" (f64.const 2) (f64.const nan) (i32.const 1)) (f64.const 2))
(assert_return (invoke "select-f64" (f64.const 2) (f64.const nan:0x20304) (i32.const 1)) (f64.const 2))
(assert_return (invoke "select-f64" (f64.const 2) (f64.const nan) (i32.const 0)) (f64.const nan))
(assert_return (invoke "select-f64" (f64.const 2) (f64.const nan:0x20304) (i32.const 0)) (f64.const nan:0x20304))

(assert_return (invoke "select-i32-t" (i32.const 1) (i32.const 2) (i32.const 1)) (i32.const 1))
(assert_return (invoke "select-i64-t" (i64.const 2) (i64.const 1) (i32.const 1)) (i64.const 2))
(assert_return (invoke "select-f32-t" (f32.const 1) (f32.const 2) (i32.const 1)) (f32.const 1))
(assert_return (invoke "select-f64-t" (f64.const 1) (f64.const 2) (i32.const 1)) (f64.const 1))
(assert_return (invoke "select-funcref" (ref.null func) (ref.null func) (i32.const 1)) (ref.null func))
(assert_return (invoke "select-externref" (ref.extern 1) (ref.extern 2) (i32.const 1)) (ref.extern 1))

(assert_return (invoke "select-i32-t" (i32.const 1) (i32.const 2) (i32.const 0)) (i32.const 2))
(assert_return (invoke "select-i32-t" (i32.const 2) (i32.const 1) (i32.const 0)) (i32.const 1))
(assert_return (invoke "select-i64-t" (i64.const 2) (i64.const 1) (i32.const -1)) (i64.const 2))
(assert_return (invoke "select-i64-t" (i64.const 2) (i64.const 1) (i32.const 0xf0f0f0f0)) (i64.const 2))
(assert_return (invoke "select-externref" (ref.extern 1) (ref.extern 2) (i32.const 0)) (ref.extern 2))
(assert_return (invoke "select-externref" (ref.extern 2) (ref.extern 1) (i32.const 0)) (ref.extern 1))

(assert_return (invoke "select-f32-t" (f32.const nan) (f32.const 1) (i32.const 1)) (f32.const nan))
(assert_return (invoke "select-f32-t" (f32.const nan:0x20304) (f32.const 1) (i32.const 1)) (f32.const nan:0x20304))
(assert_return (invoke "select-f32-t" (f32.const nan) (f32.const 1) (i32.const 0)) (f32.const 1))
(assert_return (invoke "select-f32-t" (f32.const nan:0x20304) (f32.const 1) (i32.const 0)) (f32.const 1))
(assert_return (invoke "select-f32-t" (f32.const 2) (f32.const nan) (i32.const 1)) (f32.const 2))
(assert_return (invoke "select-f32-t" (f32.const 2) (f32.const nan:0x20304) (i32.const 1)) (f32.const 2))
(assert_return (invoke "select-f32-t" (f32.const 2) (f32.const nan) (i32.const 0)) (f32.const nan))
(assert_return (invoke "select-f32-t" (f32.const 2) (f32.const nan:0x20304) (i32.const 0)) (f32.const nan:0x20304))

(assert_return (invoke "select-f64-t" (f64.const nan) (f64.const 1) (i32.const 1)) (f64.const nan))
(assert_return (invoke "select-f64-t" (f64.const nan:0x20304) (f64.const 1) (i32.const 1)) (f64.const nan:0x20304))
(assert_return (invoke "select-f64-t" (f64.const nan) (f64.const 1) (i32.const 0)) (f64.const 1))
(assert_return (invoke "select-f64-t" (f64.const nan:0x20304) (f64.const 1) (i32.const 0)) (f64.const 1))
(assert_return (invoke "select-f64-t" (f64.const 2) (f64.const nan) (i32.const 1)) (f64.const 2))
(assert_return (invoke "select-f64-t" (f64.const 2) (f64.const nan:0x20304) (i32.const 1)) (f64.const 2))
(assert_return (invoke "select-f64-t" (f64.const 2) (f64.const nan) (i32.const 0)) (f64.const nan))
(assert_return (invoke "select-f64-t" (f64.const 2) (f64.const nan:0x20304) (i32.const 0)) (f64.const nan:0x20304))

(assert_return (invoke "join-funcnull" (i32.const 1)) (ref.func))
(assert_return (invoke "join-funcnull" (i32.const 0)) (ref.null func)) ;; we require type in expected results

(assert_trap (invoke "select-trap-left" (i32.const 1)) "unreachable")
(assert_trap (invoke "select-trap-left" (i32.const 0)) "unreachable")
(assert_trap (invoke "select-trap-right" (i32.const 1)) "unreachable")
(assert_trap (invoke "select-trap-right" (i32.const 0)) "unreachable")

(assert_return (invoke "as-select-first" (i32.const 0)) (i32.const 1))
(assert_return (invoke "as-select-first" (i32.const 1)) (i32.const 0))
(assert_return (invoke "as-select-mid" (i32.const 0)) (i32.const 2))
(assert_return (invoke "as-select-mid" (i32.const 1)) (i32.const 2))
(assert_return (invoke "as-select-last" (i32.const 0)) (i32.const 2))
(assert_return (invoke "as-select-last" (i32.const 1)) (i32.const 3))

(assert_return (invoke "as-loop-first" (i32.const 0)) (i32.const 3))
(assert_return (invoke "as-loop-first" (i32.const 1)) (i32.const 2))
(assert_return (invoke "as-loop-mid" (i32.const 0)) (i32.const 3))
(assert_return (invoke "as-loop-mid" (i32.const 1)) (i32.const 2))
(assert_return (invoke "as-loop-last" (i32.const 0)) (i32.const 3))
(assert_return (invoke "as-loop-last" (i32.const 1)) (i32.const 2))

(assert_return (invoke "as-if-condition" (i32.const 0)))
(assert_return (invoke "as-if-condition" (i32.const 1)))
(assert_return (invoke "as-if-then" (i32.const 0)) (i32.const 3))
(assert_return (invoke "as-if-then" (i32.const 1)) (i32.const 2))
(assert_return (invoke "as-if-else" (i32.const 0)) (i32.const 3))
(assert_return (invoke "as-if-else" (i32.const 1)) (i32.const 2))

(assert_return (invoke "as-br_if-first" (i32.const 0)) (i32.const 3))
(assert_return (invoke "as-br_if-first" (i32.const 1)) (i32.const 2))
(assert_return (invoke "as-br_if-last" (i32.const 0)) (i32.const 2))
(assert_return (invoke "as-br_if-last" (i32.const 1)) (i32.const 2))

(assert_return (invoke "as-br_table-first" (i32.const 0)) (i32.const 3))
(assert_return (invoke "as-br_table-first" (i32.const 1)) (i32.const 2))
(assert_return (invoke "as-br_table-last" (i32.const 0)) (i32.const 2))
(assert_return (invoke "as-br_table-last" (i32.const 1)) (i32.const 2))

(assert_return (invoke "as-call_indirect-first" (i32.const 0)) (i32.const 3))
(assert_return (invoke "as-call_indirect-first" (i32.const 1)) (i32.const 2))
(assert_return (invoke "as-call_indirect-mid" (i32.const 0)) (i32.const 1))
(assert_return (invoke "as-call_indirect-mid" (i32.const 1)) (i32.const 1))
(assert_trap (invoke "as-call_indirect-last" (i32.const 0)) "undefined element")
(assert_trap (invoke "as-call_indirect-last" (i32.const 1)) "undefined element")

(assert_return (invoke "as-store-first" (i32.const 0)))
(assert_return (invoke "as-store-first" (i32.const 1)))
(assert_return (invoke "as-store-last" (i32.const 0)))
(assert_return (invoke "as-store-last" (i32.const 1)))

(assert_return (invoke "as-memory.grow-value" (i32.const 0)) (i32.const 1))
(assert_return (invoke "as-memory.grow-value" (i32.const 1)) (i32.const 3))

(assert_return (invoke "as-call-value" (i32.const 0)) (i32.const 2))
(assert_return (invoke "as-call-value" (i32.const 1)) (i32.const 1))
(assert_return (invoke "as-return-value" (i32.const 0)) (i32.const 2))
(assert_return (invoke "as-return-value" (i32.const 1)) (i32.const 1))
(assert_return (invoke "as-drop-operand" (i32.const 0)))
(assert_return (invoke "as-drop-operand" (i32.const 1)))
(assert_return (invoke "as-br-value" (i32.const 0)) (i32.const 2))
(assert_return (invoke "as-br-value" (i32.const 1)) (i32.const 1))
(assert_return (invoke "as-local.set-value" (i32.const 0)) (i32.const 2))
(assert_return (invoke "as-local.set-value" (i32.const 1)) (i32.const 1))
(assert_return (invoke "as-local.tee-value" (i32.const 0)) (i32.const 2))
(assert_return (invoke "as-local.tee-value" (i32.const 1)) (i32.const 1))
(assert_return (invoke "as-global.set-value" (i32.const 0)) (i32.const 2))
(assert_return (invoke "as-global.set-value" (i32.const 1)) (i32.const 1))
(assert_return (invoke "as-load-operand" (i32.const 0)) (i32.const 1))
(assert_return (invoke "as-load-operand" (i32.const 1)) (i32.const 1))

(assert_return (invoke "as-unary-operand" (i32.const 0)) (i32.const 0))
(assert_return (invoke "as-unary-operand" (i32.const 1)) (i32.const 1))
(assert_return (invoke "as-binary-operand" (i32.const 0)) (i32.const 4))
(assert_return (invoke "as-binary-operand" (i32.const 1)) (i32.const 1))
(assert_return (invoke "as-test-operand" (i32.const 0)) (i32.const 0))
(assert_return (invoke "as-test-operand" (i32.const 1)) (i32.const 1))
(assert_return (invoke "as-compare-left" (i32.const 0)) (i32.const 0))
(assert_return (invoke "as-compare-left" (i32.const 1)) (i32.const 1))
(assert_return (invoke "as-compare-right" (i32.const 0)) (i32.const 0))
(assert_return (invoke "as-compare-right" (i32.const 1)) (i32.const 1))
(assert_return (invoke "as-convert-operand" (i32.const 0)) (i32.const 0))
(assert_return (invoke "as-convert-operand" (i32.const 1)) (i32.const 1))

(assert_invalid
  (module (func $arity-0-implicit (select (nop) (nop) (i32.const 1))))
  "type mismatch"
)
(assert_invalid
  (module (func $arity-0 (select (result) (nop) (nop) (i32.const 1))))
  "invalid result arity"
)
(assert_invalid
  (module (func $arity-2 (result i32 i32)
    (select (result i32 i32)
      (i32.const 0) (i32.const 0)
      (i32.const 0) (i32.const 0)
      (i32.const 1)
    )
  ))
  "invalid result arity"
)


(assert_invalid
  (module (type $t (func))
    (func $type-ref-implicit (param $r (ref $t))
      (drop (select (local.get $r) (local.get $r) (i32.const 1)))
    )
  )
  "type mismatch"
)
(assert_invalid
  (module (func $type-funcref-implicit (param $r funcref)
    (drop (select (local.get $r) (local.get $r) (i32.const 1)))
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-externref-implicit (param $r externref)
    (drop (select (local.get $r) (local.get $r) (i32.const 1)))
  ))
  "type mismatch"
)
(module (func $type-unreachable-ref-implicit
  (drop (ref.is_null (select (unreachable) (i32.const 1))))
))

(assert_invalid
  (module (func $type-num-vs-num
    (drop (select (i32.const 1) (i64.const 1) (i32.const 1)))
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-num-vs-num
    (drop (select (i32.const 1) (f32.const 1.0) (i32.const 1)))
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-num-vs-num
    (drop (select (i32.const 1) (f64.const 1.0) (i32.const 1)))
  ))
  "type mismatch"
)

(assert_invalid
  (module (func $type-num-vs-num (select (i32.const 1) (i64.const 1) (i32.const 1)) (drop)))
  "type mismatch"
)
(assert_invalid
  (module (func $type-num-vs-num (select (i32.const 1) (f32.const 1.0) (i32.const 1)) (drop)))
  "type mismatch"
)
(assert_invalid
  (module (func $type-num-vs-num (select (i32.const 1) (i64.const 1) (i32.const 1)) (drop)))
  "type mismatch"
)
(assert_invalid
  (module (func $type-num-vs-num (select (i32.const 1) (f32.const 1.0) (i32.const 1)) (drop)))
  "type mismatch"
)
(assert_invalid
  (module (func $type-num-vs-num (select (i32.const 1) (f64.const 1.0) (i32.const 1)) (drop)))
  "type mismatch"
)


(assert_invalid
  (module
    (func $type-1st-operand-empty
      (select) (drop)
    )
  )
  "type mismatch"
)
(assert_invalid
  (module
    (func $type-2nd-operand-empty
      (i32.const 0) (select) (drop)
    )
  )
  "type mismatch"
)
(assert_invalid
  (module
    (func $type-3rd-operand-empty
      (i32.const 0) (i32.const 0) (select) (drop)
    )
  )
  "type mismatch"
)
(assert_invalid
  (module
    (func $type-1st-operand-empty-in-block
      (i32.const 0) (i32.const 0) (i32.const 0)
      (block (select) (drop))
    )
  )
  "type mismatch"
)
(assert_invalid
  (module
    (func $type-2nd-operand-empty-in-block
      (i32.const 0) (i32.const 0)
      (block (i32.const 0) (select) (drop))
    )
  )
  "type mismatch"
)
(assert_invalid
  (module
    (func $type-3rd-operand-empty-in-block
      (i32.const 0)
      (block (i32.const 0) (i32.const 0) (select) (drop))
    )
  )
  "type mismatch"
)
(assert_invalid
  (module
    (func $type-1st-operand-empty-in-loop
      (i32.const 0) (i32.const 0) (i32.const 0)
      (loop (select) (drop))
    )
  )
  "type mismatch"
)
(assert_invalid
  (module
    (func $type-2nd-operand-empty-in-loop
      (i32.const 0) (i32.const 0)
      (loop (i32.const 0) (select) (drop))
    )
  )
  "type mismatch"
)
(assert_invalid
  (module
    (func $type-3rd-operand-empty-in-loop
      (i32.const 0)
      (loop (i32.const 0) (i32.const 0) (select) (drop))
    )
  )
  "type mismatch"
)
(assert_invalid
  (module
    (func $type-1st-operand-empty-in-then
      (i32.const 0) (i32.const 0) (i32.const 0)
      (if (then (select) (drop)))
    )
  )
  "type mismatch"
)
(assert_invalid
  (module
    (func $type-2nd-operand-empty-in-then
      (i32.const 0) (i32.const 0)
      (if (then (i32.const 0) (select) (drop)))
    )
  )
  "type mismatch"
)
(assert_invalid
  (module
    (func $type-3rd-operand-empty-in-then
      (i32.const 0)
      (if (then (i32.const 0) (i32.const 0) (select) (drop)))
    )
  )
  "type mismatch"
)

;; Third operand must be i32

(assert_invalid
  (module (func (select (i32.const 1) (i32.const 1) (i64.const 1)) (drop)))
  "type mismatch"
)
(assert_invalid
  (module (func (select (i32.const 1) (i32.const 1) (f32.const 1)) (drop)))
  "type mismatch"
)
(assert_invalid
  (module (func (select (i32.const 1) (i32.const 1) (f64.const 1)) (drop)))
  "type mismatch"
)

;; Result of select has type of first two operands

(assert_invalid
  (module (func (result i32) (select (i64.const 1) (i64.const 1) (i32.const 1))))
  "type mismatch"
)


;; Flat syntax

(module
  (table 1 funcref)
  (func (result i32) unreachable select)
  (func (result i32) unreachable select nop)
  (func (result i32) unreachable select (select))
  (func (result i32) unreachable select select)
  (func (result i32) unreachable select select select)
  (func (result i32) unreachable select (result i32))
  (func (result i32) unreachable select (result i32) (result))
  (func (result i32) unreachable select (result i32) (result) select)
  (func (result i32) unreachable select (result) (result i32) select (result i32))
  (func (result i32) unreachable select call_indirect)
  (func (result i32) unreachable select call_indirect select)
)