$2b997e90 resolve-this-caching.js:4:1
  Registers: 7
  Blocks:    1
  Constants:
    [0] = Undefined

block0:
  [   0] GetGlobal dst:reg6, `foo`
  [  18] Call dst:reg5, callee:reg6, this_value:Undefined, foo
  [  38] End value:reg5


foo$1d0ffb84 resolve-this-caching.js:2:5
  Registers: 7
  Blocks:    1
  Constants:
    [0] = Undefined

block0:
  [   0] NewFunction dst:reg6, shared_function_data_index:0
  [  18] Call dst:reg5, callee:reg6, this_value:Undefined
  [  38] Return value:reg5


$9bf17e5a resolve-this-caching.js:2:13
  Registers: 8
  Blocks:    1

block0:
  [   0] ResolveThisBinding
  [   8] GetById dst:reg5, base:this, `x` (this.x)
  [  28] GetById dst:reg6, base:this, `y` (this.y)
  [  48] Add dst:reg7, lhs:reg5, rhs:reg6
  [  58] Return value:reg7