$393b7f47 assign-to-argument-no-tdz.js:11:1
  Registers: 7
  Blocks:    1
  Constants:
    [0] = Undefined
    [1] = Int32(0)

block0:
  [   0] GetGlobal dst:reg6, `f`
  [  18] Call dst:reg5, callee:reg6, this_value:Undefined, f, arguments:[Int32(0)]
  [  40] End value:reg5


f$44906188 assign-to-argument-no-tdz.js:6:5
  Registers: 5
  Blocks:    1
  Locals:    y~0
  Constants:
    [0] = Int32(1)

block0:
  [   0] Mov2 dst1:y~0, src1:Int32(1), dst2:arg0, src2:y~0
  [  18] Return value:arg0