;; Test interesting integer "expressions". These tests contain code
;; patterns which tempt common value-changing optimizations.

;; Test that x+1<y+1 is not folded to x<y.

(module
  (func (export "i32.no_fold_cmp_s_offset") (param $x i32) (param $y i32) (result i32)
    (i32.lt_s (i32.add (local.get $x) (i32.const 1)) (i32.add (local.get $y) (i32.const 1))))
  (func (export "i32.no_fold_cmp_u_offset") (param $x i32) (param $y i32) (result i32)
    (i32.lt_u (i32.add (local.get $x) (i32.const 1)) (i32.add (local.get $y) (i32.const 1))))

  (func (export "i64.no_fold_cmp_s_offset") (param $x i64) (param $y i64) (result i32)
    (i64.lt_s (i64.add (local.get $x) (i64.const 1)) (i64.add (local.get $y) (i64.const 1))))
  (func (export "i64.no_fold_cmp_u_offset") (param $x i64) (param $y i64) (result i32)
    (i64.lt_u (i64.add (local.get $x) (i64.const 1)) (i64.add (local.get $y) (i64.const 1))))
)

(assert_return (invoke "i32.no_fold_cmp_s_offset" (i32.const 0x7fffffff) (i32.const 0)) (i32.const 1))
(assert_return (invoke "i32.no_fold_cmp_u_offset" (i32.const 0xffffffff) (i32.const 0)) (i32.const 1))
(assert_return (invoke "i64.no_fold_cmp_s_offset" (i64.const 0x7fffffffffffffff) (i64.const 0)) (i32.const 1))
(assert_return (invoke "i64.no_fold_cmp_u_offset" (i64.const 0xffffffffffffffff) (i64.const 0)) (i32.const 1))

;; Test that wrap(extend_s(x)) is not folded to x.

(module
  (func (export "i64.no_fold_wrap_extend_s") (param $x i64) (result i64)
    (i64.extend_i32_s (i32.wrap_i64 (local.get $x))))
)

(assert_return (invoke "i64.no_fold_wrap_extend_s" (i64.const 0x0010203040506070)) (i64.const 0x0000000040506070))
(assert_return (invoke "i64.no_fold_wrap_extend_s" (i64.const 0x00a0b0c0d0e0f0a0)) (i64.const 0xffffffffd0e0f0a0))

;; Test that wrap(extend_u(x)) is not folded to x.

(module
  (func (export "i64.no_fold_wrap_extend_u") (param $x i64) (result i64)
    (i64.extend_i32_u (i32.wrap_i64 (local.get $x))))
)

(assert_return (invoke "i64.no_fold_wrap_extend_u" (i64.const 0x0010203040506070)) (i64.const 0x0000000040506070))

;; Test that x<<n>>n is not folded to x.

(module
  (func (export "i32.no_fold_shl_shr_s") (param $x i32) (result i32)
    (i32.shr_s (i32.shl (local.get $x) (i32.const 1)) (i32.const 1)))
  (func (export "i32.no_fold_shl_shr_u") (param $x i32) (result i32)
    (i32.shr_u (i32.shl (local.get $x) (i32.const 1)) (i32.const 1)))

  (func (export "i64.no_fold_shl_shr_s") (param $x i64) (result i64)
    (i64.shr_s (i64.shl (local.get $x) (i64.const 1)) (i64.const 1)))
  (func (export "i64.no_fold_shl_shr_u") (param $x i64) (result i64)
    (i64.shr_u (i64.shl (local.get $x) (i64.const 1)) (i64.const 1)))
)

(assert_return (invoke "i32.no_fold_shl_shr_s" (i32.const 0x80000000)) (i32.const 0))
(assert_return (invoke "i32.no_fold_shl_shr_u" (i32.const 0x80000000)) (i32.const 0))
(assert_return (invoke "i64.no_fold_shl_shr_s" (i64.const 0x8000000000000000)) (i64.const 0))
(assert_return (invoke "i64.no_fold_shl_shr_u" (i64.const 0x8000000000000000)) (i64.const 0))

;; Test that x>>n<<n is not folded to x.

(module
  (func (export "i32.no_fold_shr_s_shl") (param $x i32) (result i32)
    (i32.shl (i32.shr_s (local.get $x) (i32.const 1)) (i32.const 1)))
  (func (export "i32.no_fold_shr_u_shl") (param $x i32) (result i32)
    (i32.shl (i32.shr_u (local.get $x) (i32.const 1)) (i32.const 1)))

  (func (export "i64.no_fold_shr_s_shl") (param $x i64) (result i64)
    (i64.shl (i64.shr_s (local.get $x) (i64.const 1)) (i64.const 1)))
  (func (export "i64.no_fold_shr_u_shl") (param $x i64) (result i64)
    (i64.shl (i64.shr_u (local.get $x) (i64.const 1)) (i64.const 1)))
)

(assert_return (invoke "i32.no_fold_shr_s_shl" (i32.const 1)) (i32.const 0))
(assert_return (invoke "i32.no_fold_shr_u_shl" (i32.const 1)) (i32.const 0))
(assert_return (invoke "i64.no_fold_shr_s_shl" (i64.const 1)) (i64.const 0))
(assert_return (invoke "i64.no_fold_shr_u_shl" (i64.const 1)) (i64.const 0))

;; Test that x/n*n is not folded to x.

(module
  (func (export "i32.no_fold_div_s_mul") (param $x i32) (result i32)
    (i32.mul (i32.div_s (local.get $x) (i32.const 6)) (i32.const 6)))
  (func (export "i32.no_fold_div_u_mul") (param $x i32) (result i32)
    (i32.mul (i32.div_u (local.get $x) (i32.const 6)) (i32.const 6)))

  (func (export "i64.no_fold_div_s_mul") (param $x i64) (result i64)
    (i64.mul (i64.div_s (local.get $x) (i64.const 6)) (i64.const 6)))
  (func (export "i64.no_fold_div_u_mul") (param $x i64) (result i64)
    (i64.mul (i64.div_u (local.get $x) (i64.const 6)) (i64.const 6)))
)

(assert_return (invoke "i32.no_fold_div_s_mul" (i32.const 1)) (i32.const 0))
(assert_return (invoke "i32.no_fold_div_u_mul" (i32.const 1)) (i32.const 0))
(assert_return (invoke "i64.no_fold_div_s_mul" (i64.const 1)) (i64.const 0))
(assert_return (invoke "i64.no_fold_div_u_mul" (i64.const 1)) (i64.const 0))

;; Test that x/x is not folded to 1.

(module
  (func (export "i32.no_fold_div_s_self") (param $x i32) (result i32)
    (i32.div_s (local.get $x) (local.get $x)))
  (func (export "i32.no_fold_div_u_self") (param $x i32) (result i32)
    (i32.div_u (local.get $x) (local.get $x)))

  (func (export "i64.no_fold_div_s_self") (param $x i64) (result i64)
    (i64.div_s (local.get $x) (local.get $x)))
  (func (export "i64.no_fold_div_u_self") (param $x i64) (result i64)
    (i64.div_u (local.get $x) (local.get $x)))
)

(assert_trap (invoke "i32.no_fold_div_s_self" (i32.const 0)) "integer divide by zero")
(assert_trap (invoke "i32.no_fold_div_u_self" (i32.const 0)) "integer divide by zero")
(assert_trap (invoke "i64.no_fold_div_s_self" (i64.const 0)) "integer divide by zero")
(assert_trap (invoke "i64.no_fold_div_u_self" (i64.const 0)) "integer divide by zero")

;; Test that x%x is not folded to 0.

(module
  (func (export "i32.no_fold_rem_s_self") (param $x i32) (result i32)
    (i32.rem_s (local.get $x) (local.get $x)))
  (func (export "i32.no_fold_rem_u_self") (param $x i32) (result i32)
    (i32.rem_u (local.get $x) (local.get $x)))

  (func (export "i64.no_fold_rem_s_self") (param $x i64) (result i64)
    (i64.rem_s (local.get $x) (local.get $x)))
  (func (export "i64.no_fold_rem_u_self") (param $x i64) (result i64)
    (i64.rem_u (local.get $x) (local.get $x)))
)

(assert_trap (invoke "i32.no_fold_rem_s_self" (i32.const 0)) "integer divide by zero")
(assert_trap (invoke "i32.no_fold_rem_u_self" (i32.const 0)) "integer divide by zero")
(assert_trap (invoke "i64.no_fold_rem_s_self" (i64.const 0)) "integer divide by zero")
(assert_trap (invoke "i64.no_fold_rem_u_self" (i64.const 0)) "integer divide by zero")

;; Test that x*n/n is not folded to x.

(module
  (func (export "i32.no_fold_mul_div_s") (param $x i32) (result i32)
    (i32.div_s (i32.mul (local.get $x) (i32.const 6)) (i32.const 6)))
  (func (export "i32.no_fold_mul_div_u") (param $x i32) (result i32)
    (i32.div_u (i32.mul (local.get $x) (i32.const 6)) (i32.const 6)))

  (func (export "i64.no_fold_mul_div_s") (param $x i64) (result i64)
    (i64.div_s (i64.mul (local.get $x) (i64.const 6)) (i64.const 6)))
  (func (export "i64.no_fold_mul_div_u") (param $x i64) (result i64)
    (i64.div_u (i64.mul (local.get $x) (i64.const 6)) (i64.const 6)))
)

(assert_return (invoke "i32.no_fold_mul_div_s" (i32.const 0x80000000)) (i32.const 0))
(assert_return (invoke "i32.no_fold_mul_div_u" (i32.const 0x80000000)) (i32.const 0))
(assert_return (invoke "i64.no_fold_mul_div_s" (i64.const 0x8000000000000000)) (i64.const 0))
(assert_return (invoke "i64.no_fold_mul_div_u" (i64.const 0x8000000000000000)) (i64.const 0))

;; Test that x/n where n is a known power of 2 is not folded to shr_s.

(module
  (func (export "i32.no_fold_div_s_2") (param $x i32) (result i32)
    (i32.div_s (local.get $x) (i32.const 2)))

  (func (export "i64.no_fold_div_s_2") (param $x i64) (result i64)
    (i64.div_s (local.get $x) (i64.const 2)))
)

(assert_return (invoke "i32.no_fold_div_s_2" (i32.const -11)) (i32.const -5))
(assert_return (invoke "i64.no_fold_div_s_2" (i64.const -11)) (i64.const -5))

;; Test that x%n where n is a known power of 2 is not folded to and.

(module
  (func (export "i32.no_fold_rem_s_2") (param $x i32) (result i32)
    (i32.rem_s (local.get $x) (i32.const 2)))

  (func (export "i64.no_fold_rem_s_2") (param $x i64) (result i64)
    (i64.rem_s (local.get $x) (i64.const 2)))
)

(assert_return (invoke "i32.no_fold_rem_s_2" (i32.const -11)) (i32.const -1))
(assert_return (invoke "i64.no_fold_rem_s_2" (i64.const -11)) (i64.const -1))

;; Test that x/0 works.

(module
  (func (export "i32.div_s_0") (param $x i32) (result i32)
    (i32.div_s (local.get $x) (i32.const 0)))
  (func (export "i32.div_u_0") (param $x i32) (result i32)
    (i32.div_u (local.get $x) (i32.const 0)))

  (func (export "i64.div_s_0") (param $x i64) (result i64)
    (i64.div_s (local.get $x) (i64.const 0)))
  (func (export "i64.div_u_0") (param $x i64) (result i64)
    (i64.div_u (local.get $x) (i64.const 0)))
)

(assert_trap (invoke "i32.div_s_0" (i32.const 71)) "integer divide by zero")
(assert_trap (invoke "i32.div_u_0" (i32.const 71)) "integer divide by zero")
(assert_trap (invoke "i64.div_s_0" (i64.const 71)) "integer divide by zero")
(assert_trap (invoke "i64.div_u_0" (i64.const 71)) "integer divide by zero")

;; Test that x/3 works.

(module
  (func (export "i32.div_s_3") (param $x i32) (result i32)
    (i32.div_s (local.get $x) (i32.const 3)))
  (func (export "i32.div_u_3") (param $x i32) (result i32)
    (i32.div_u (local.get $x) (i32.const 3)))

  (func (export "i64.div_s_3") (param $x i64) (result i64)
    (i64.div_s (local.get $x) (i64.const 3)))
  (func (export "i64.div_u_3") (param $x i64) (result i64)
    (i64.div_u (local.get $x) (i64.const 3)))
)

(assert_return (invoke "i32.div_s_3" (i32.const 71)) (i32.const 23))
(assert_return (invoke "i32.div_s_3" (i32.const 0x60000000)) (i32.const 0x20000000))
(assert_return (invoke "i32.div_u_3" (i32.const 71)) (i32.const 23))
(assert_return (invoke "i32.div_u_3" (i32.const 0xc0000000)) (i32.const 0x40000000))
(assert_return (invoke "i64.div_s_3" (i64.const 71)) (i64.const 23))
(assert_return (invoke "i64.div_s_3" (i64.const 0x3000000000000000)) (i64.const 0x1000000000000000))
(assert_return (invoke "i64.div_u_3" (i64.const 71)) (i64.const 23))
(assert_return (invoke "i64.div_u_3" (i64.const 0xc000000000000000)) (i64.const 0x4000000000000000))

;; Test that x/5 works.

(module
  (func (export "i32.div_s_5") (param $x i32) (result i32)
    (i32.div_s (local.get $x) (i32.const 5)))
  (func (export "i32.div_u_5") (param $x i32) (result i32)
    (i32.div_u (local.get $x) (i32.const 5)))

  (func (export "i64.div_s_5") (param $x i64) (result i64)
    (i64.div_s (local.get $x) (i64.const 5)))
  (func (export "i64.div_u_5") (param $x i64) (result i64)
    (i64.div_u (local.get $x) (i64.const 5)))
)

(assert_return (invoke "i32.div_s_5" (i32.const 71)) (i32.const 14))
(assert_return (invoke "i32.div_s_5" (i32.const 0x50000000)) (i32.const 0x10000000))
(assert_return (invoke "i32.div_u_5" (i32.const 71)) (i32.const 14))
(assert_return (invoke "i32.div_u_5" (i32.const 0xa0000000)) (i32.const 0x20000000))
(assert_return (invoke "i64.div_s_5" (i64.const 71)) (i64.const 14))
(assert_return (invoke "i64.div_s_5" (i64.const 0x5000000000000000)) (i64.const 0x1000000000000000))
(assert_return (invoke "i64.div_u_5" (i64.const 71)) (i64.const 14))
(assert_return (invoke "i64.div_u_5" (i64.const 0xa000000000000000)) (i64.const 0x2000000000000000))

;; Test that x/7 works.

(module
  (func (export "i32.div_s_7") (param $x i32) (result i32)
    (i32.div_s (local.get $x) (i32.const 7)))
  (func (export "i32.div_u_7") (param $x i32) (result i32)
    (i32.div_u (local.get $x) (i32.const 7)))

  (func (export "i64.div_s_7") (param $x i64) (result i64)
    (i64.div_s (local.get $x) (i64.const 7)))
  (func (export "i64.div_u_7") (param $x i64) (result i64)
    (i64.div_u (local.get $x) (i64.const 7)))
)

(assert_return (invoke "i32.div_s_7" (i32.const 71)) (i32.const 10))
(assert_return (invoke "i32.div_s_7" (i32.const 0x70000000)) (i32.const 0x10000000))
(assert_return (invoke "i32.div_u_7" (i32.const 71)) (i32.const 10))
(assert_return (invoke "i32.div_u_7" (i32.const 0xe0000000)) (i32.const 0x20000000))
(assert_return (invoke "i64.div_s_7" (i64.const 71)) (i64.const 10))
(assert_return (invoke "i64.div_s_7" (i64.const 0x7000000000000000)) (i64.const 0x1000000000000000))
(assert_return (invoke "i64.div_u_7" (i64.const 71)) (i64.const 10))
(assert_return (invoke "i64.div_u_7" (i64.const 0xe000000000000000)) (i64.const 0x2000000000000000))

;; Test that x%3 works.

(module
  (func (export "i32.rem_s_3") (param $x i32) (result i32)
    (i32.rem_s (local.get $x) (i32.const 3)))
  (func (export "i32.rem_u_3") (param $x i32) (result i32)
    (i32.rem_u (local.get $x) (i32.const 3)))

  (func (export "i64.rem_s_3") (param $x i64) (result i64)
    (i64.rem_s (local.get $x) (i64.const 3)))
  (func (export "i64.rem_u_3") (param $x i64) (result i64)
    (i64.rem_u (local.get $x) (i64.const 3)))
)

(assert_return (invoke "i32.rem_s_3" (i32.const 71)) (i32.const 2))
(assert_return (invoke "i32.rem_s_3" (i32.const 0x60000000)) (i32.const 0))
(assert_return (invoke "i32.rem_u_3" (i32.const 71)) (i32.const 2))
(assert_return (invoke "i32.rem_u_3" (i32.const 0xc0000000)) (i32.const 0))
(assert_return (invoke "i64.rem_s_3" (i64.const 71)) (i64.const 2))
(assert_return (invoke "i64.rem_s_3" (i64.const 0x3000000000000000)) (i64.const 0))
(assert_return (invoke "i64.rem_u_3" (i64.const 71)) (i64.const 2))
(assert_return (invoke "i64.rem_u_3" (i64.const 0xc000000000000000)) (i64.const 0))

;; Test that x%5 works.

(module
  (func (export "i32.rem_s_5") (param $x i32) (result i32)
    (i32.rem_s (local.get $x) (i32.const 5)))
  (func (export "i32.rem_u_5") (param $x i32) (result i32)
    (i32.rem_u (local.get $x) (i32.const 5)))

  (func (export "i64.rem_s_5") (param $x i64) (result i64)
    (i64.rem_s (local.get $x) (i64.const 5)))
  (func (export "i64.rem_u_5") (param $x i64) (result i64)
    (i64.rem_u (local.get $x) (i64.const 5)))
)

(assert_return (invoke "i32.rem_s_5" (i32.const 71)) (i32.const 1))
(assert_return (invoke "i32.rem_s_5" (i32.const 0x50000000)) (i32.const 0))
(assert_return (invoke "i32.rem_u_5" (i32.const 71)) (i32.const 1))
(assert_return (invoke "i32.rem_u_5" (i32.const 0xa0000000)) (i32.const 0))
(assert_return (invoke "i64.rem_s_5" (i64.const 71)) (i64.const 1))
(assert_return (invoke "i64.rem_s_5" (i64.const 0x5000000000000000)) (i64.const 0))
(assert_return (invoke "i64.rem_u_5" (i64.const 71)) (i64.const 1))
(assert_return (invoke "i64.rem_u_5" (i64.const 0xa000000000000000)) (i64.const 0))

;; Test that x%7 works.

(module
  (func (export "i32.rem_s_7") (param $x i32) (result i32)
    (i32.rem_s (local.get $x) (i32.const 7)))
  (func (export "i32.rem_u_7") (param $x i32) (result i32)
    (i32.rem_u (local.get $x) (i32.const 7)))

  (func (export "i64.rem_s_7") (param $x i64) (result i64)
    (i64.rem_s (local.get $x) (i64.const 7)))
  (func (export "i64.rem_u_7") (param $x i64) (result i64)
    (i64.rem_u (local.get $x) (i64.const 7)))
)

(assert_return (invoke "i32.rem_s_7" (i32.const 71)) (i32.const 1))
(assert_return (invoke "i32.rem_s_7" (i32.const 0x70000000)) (i32.const 0))
(assert_return (invoke "i32.rem_u_7" (i32.const 71)) (i32.const 1))
(assert_return (invoke "i32.rem_u_7" (i32.const 0xe0000000)) (i32.const 0))
(assert_return (invoke "i64.rem_s_7" (i64.const 71)) (i64.const 1))
(assert_return (invoke "i64.rem_s_7" (i64.const 0x7000000000000000)) (i64.const 0))
(assert_return (invoke "i64.rem_u_7" (i64.const 71)) (i64.const 1))
(assert_return (invoke "i64.rem_u_7" (i64.const 0xe000000000000000)) (i64.const 0))

;; Test that x/-1 is not folded to -x.

(module
  (func (export "i32.no_fold_div_neg1") (param $x i32) (result i32)
    (i32.div_s (local.get $x) (i32.const -1)))

  (func (export "i64.no_fold_div_neg1") (param $x i64) (result i64)
    (i64.div_s (local.get $x) (i64.const -1)))
)

(assert_trap (invoke "i32.no_fold_div_neg1" (i32.const 0x80000000)) "integer overflow")
(assert_trap (invoke "i64.no_fold_div_neg1" (i64.const 0x8000000000000000)) "integer overflow")