wat file from https://github.com/meheleventyone/zig-wasm-test/tree/master/www

wasmtest.wat

(module
  (type $t0 (func (param i32 i32)))
  (type $t1 (func (param i32 i32) (result i32)))
  (func $std.builtin.default_panic (type $t0) (param $p0 i32) (param $p1 i32)
    (local $l2 i32) (local $l3 i32) (local $l4 i32)
    global.get $g0
    local.set $l2
    i32.const 16
    local.set $l3
    local.get $l2
    local.get $l3
    i32.sub
    local.set $l4
    local.get $l4
    local.get $p1
    i32.store offset=12
    loop $L0
      unreachable
      br $L0
    end)
  (func $add (type $t1) (param $p0 i32) (param $p1 i32) (result i32)
    (local $l2 i32) (local $l3 i32) (local $l4 i32) (local $l5 i32) (local $l6 i32) (local $l7 i32) (local $l8 i32) (local $l9 i32) (local $l10 i32) (local $l11 i32) (local $l12 i32) (local $l13 i32) (local $l14 i32) (local $l15 i32) (local $l16 i32) (local $l17 i32) (local $l18 i32)
    global.get $g0
    local.set $l2
    i32.const 16
    local.set $l3
    local.get $l2
    local.get $l3
    i32.sub
    local.set $l4
    local.get $l4
    global.set $g0
    local.get $l4
    local.get $p0
    i32.store offset=8
    local.get $l4
    local.get $p1
    i32.store offset=4
    local.get $l4
    i32.load offset=8
    local.set $l5
    local.get $l4
    i32.load offset=4
    local.set $l6
    i32.const 0
    local.set $l7
    local.get $l6
    local.get $l7
    i32.lt_s
    local.set $l8
    local.get $l5
    local.get $l6
    i32.add
    local.set $l9
    local.get $l9
    local.get $l5
    i32.lt_s
    local.set $l10
    local.get $l8
    local.get $l10
    i32.xor
    local.set $l11
    i32.const 1
    local.set $l12
    local.get $l11
    local.get $l12
    i32.and
    local.set $l13
    block $B0
      local.get $l13
      i32.eqz
      br_if $B0
      i32.const 1044
      local.set $l14
      i32.const 0
      local.set $l15
      local.get $l14
      local.get $l15
      call $std.builtin.default_panic
      unreachable
    end
    local.get $l4
    local.get $l9
    i32.store offset=12
    local.get $l4
    i32.load offset=12
    local.set $l16
    i32.const 16
    local.set $l17
    local.get $l4
    local.get $l17
    i32.add
    local.set $l18
    local.get $l18
    global.set $g0
    local.get $l16
    return)
  (table $T0 1 1 funcref)
  (memory $memory 2)
  (global $g0 (mut i32) (i32.const 66592))
  (export "memory" (memory 0))
  (export "add" (func $add))
  (data $d0 (i32.const 1024) "integer overflow\00\00\00\00\00\04\00\00\10\00\00\00"))