;; Test `loop` opcode

(module
  (memory 1)

  (func $dummy)

  (func (export "empty")
    (loop)
    (loop $l)
  )

  (func (export "singular") (result i32)
    (loop (nop))
    (loop (result i32) (i32.const 7))
  )


  (func (export "nested") (result i32)
    (loop (result i32)
      (loop (call $dummy) (block) (nop))
      (loop (result i32) (call $dummy) (i32.const 9))
    )
  )

  (func (export "deep") (result i32)
    (loop (result i32) (block (result i32)
      (loop (result i32) (block (result i32)
        (loop (result i32) (block (result i32)
          (loop (result i32) (block (result i32)
            (loop (result i32) (block (result i32)
              (loop (result i32) (block (result i32)
                (loop (result i32) (block (result i32)
                  (loop (result i32) (block (result i32)
                    (loop (result i32) (block (result i32)
                      (loop (result i32) (block (result i32)
                        (loop (result i32) (block (result i32)
                          (loop (result i32) (block (result i32)
                            (loop (result i32) (block (result i32)
                              (loop (result i32) (block (result i32)
                                (loop (result i32) (block (result i32)
                                  (loop (result i32) (block (result i32)
                                    (loop (result i32) (block (result i32)
                                      (loop (result i32) (block (result i32)
                                        (loop (result i32) (block (result i32)
                                          (loop (result i32) (block (result i32)
                                            (call $dummy) (i32.const 150)
                                          ))
                                        ))
                                      ))
                                    ))
                                  ))
                                ))
                              ))
                            ))
                          ))
                        ))
                      ))
                    ))
                  ))
                ))
              ))
            ))
          ))
        ))
      ))
    ))
  )

  (func (export "as-if-condition")
    (loop (result i32) (i32.const 1)) (if (then (call $dummy)))
  )
  (func (export "as-if-then") (result i32)
    (if (result i32) (i32.const 1) (then (loop (result i32) (i32.const 1))) (else (i32.const 2)))
  )
  (func (export "as-if-else") (result i32)
    (if (result i32) (i32.const 1) (then (i32.const 2)) (else (loop (result i32) (i32.const 1))))
  )

  (func (export "as-br_if-first") (result i32)
    (block (result i32) (br_if 0 (loop (result i32) (i32.const 1)) (i32.const 2)))
  )
  (func (export "as-br_if-last") (result i32)
    (block (result i32) (br_if 0 (i32.const 2) (loop (result i32) (i32.const 1))))
  )

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

  (func (export "as-call-value") (result i32)
    (call $f (loop (result i32) (i32.const 1)))
  )
  (func (export "as-return-value") (result i32)
    (loop (result i32) (i32.const 1)) (return)
  )
  (func (export "as-br-value") (result i32)
    (block (result i32) (br 0 (loop (result i32) (i32.const 1))))
  )
  (func (export "as-local.set-value") (result i32)
    (local i32) (local.set 0 (loop (result i32) (i32.const 1))) (local.get 0)
  )

  (func (export "as-unary-operand") (result i32)
    (i32.ctz (loop (result i32) (call $dummy) (i32.const 13)))
  )
  (func (export "as-binary-operand") (result i32)
    (i32.mul
      (loop (result i32) (call $dummy) (i32.const 3))
      (loop (result i32) (call $dummy) (i32.const 4))
    )
  )
  (func (export "as-test-operand") (result i32)
    (i32.eqz (loop (result i32) (call $dummy) (i32.const 13)))
  )

  (func (export "break-inner") (result i32)
    (local i32)
    (local.set 0 (i32.const 0))
    (local.set 0 (i32.add (local.get 0) (block (result i32) (loop (result i32) (block (result i32) (br 2 (i32.const 0x1)))))))
    (local.set 0 (i32.add (local.get 0) (block (result i32) (loop (result i32) (loop (result i32) (br 2 (i32.const 0x2)))))))
    (local.set 0 (i32.add (local.get 0) (block (result i32) (loop (result i32) (block (result i32) (loop (result i32) (br 1 (i32.const 0x4))))))))
    (local.set 0 (i32.add (local.get 0) (block (result i32) (loop (result i32) (i32.ctz (br 1 (i32.const 0x8)))))))
    (local.set 0 (i32.add (local.get 0) (block (result i32) (loop (result i32) (i32.ctz (loop (result i32) (br 2 (i32.const 0x10))))))))
    (local.get 0)
  )

  (func $fx (export "effects") (result i32)
    (local i32)
    (block
      (loop
        (local.set 0 (i32.const 1))
        (local.set 0 (i32.mul (local.get 0) (i32.const 3)))
        (local.set 0 (i32.sub (local.get 0) (i32.const 5)))
        (local.set 0 (i32.mul (local.get 0) (i32.const 7)))
        (br 1)
        (local.set 0 (i32.mul (local.get 0) (i32.const 100)))
      )
    )
    (i32.eq (local.get 0) (i32.const -14))
  )

  (func (export "while") (param i64) (result i64)
    (local i64)
    (local.set 1 (i64.const 1))
    (block
      (loop
        (br_if 1 (i64.eqz (local.get 0)))
        (local.set 1 (i64.mul (local.get 0) (local.get 1)))
        (local.set 0 (i64.sub (local.get 0) (i64.const 1)))
        (br 0)
      )
    )
    (local.get 1)
  )

  (func (export "for") (param i64) (result i64)
    (local i64 i64)
    (local.set 1 (i64.const 1))
    (local.set 2 (i64.const 2))
    (block
      (loop
        (br_if 1 (i64.gt_u (local.get 2) (local.get 0)))
        (local.set 1 (i64.mul (local.get 1) (local.get 2)))
        (local.set 2 (i64.add (local.get 2) (i64.const 1)))
        (br 0)
      )
    )
    (local.get 1)
  )
)

(assert_return (invoke "empty"))
(assert_return (invoke "singular") (i32.const 7))
(assert_return (invoke "nested") (i32.const 9))
(assert_return (invoke "deep") (i32.const 150))
(assert_return (invoke "as-if-condition"))
(assert_return (invoke "as-if-then") (i32.const 1))
(assert_return (invoke "as-if-else") (i32.const 2))
(assert_return (invoke "as-br_if-first") (i32.const 1))
(assert_return (invoke "as-br_if-last") (i32.const 2))
(assert_return (invoke "as-call-value") (i32.const 1))
(assert_return (invoke "as-return-value") (i32.const 1))
(assert_return (invoke "as-br-value") (i32.const 1))
(assert_return (invoke "as-local.set-value") (i32.const 1))
(assert_return (invoke "as-unary-operand") (i32.const 0))
(assert_return (invoke "as-binary-operand") (i32.const 12))
(assert_return (invoke "as-test-operand") (i32.const 0))
(assert_return (invoke "break-inner") (i32.const 0x1f))
(assert_return (invoke "effects") (i32.const 1))
(assert_return (invoke "while" (i64.const 0)) (i64.const 1))
(assert_return (invoke "while" (i64.const 1)) (i64.const 1))
(assert_return (invoke "while" (i64.const 2)) (i64.const 2))
(assert_return (invoke "while" (i64.const 3)) (i64.const 6))
(assert_return (invoke "while" (i64.const 5)) (i64.const 120))
(assert_return (invoke "while" (i64.const 20)) (i64.const 2432902008176640000))
(assert_return (invoke "for" (i64.const 0)) (i64.const 1))
(assert_return (invoke "for" (i64.const 1)) (i64.const 1))
(assert_return (invoke "for" (i64.const 2)) (i64.const 2))
(assert_return (invoke "for" (i64.const 3)) (i64.const 6))
(assert_return (invoke "for" (i64.const 5)) (i64.const 120))
(assert_return (invoke "for" (i64.const 20)) (i64.const 2432902008176640000))