$9431c529 right-shift-by-zero.js:5:1
  Registers: 7
  Blocks:    1
  Constants:
    [0] = Undefined
    [1] = Double(1.5)

block0:
  [   0] GetGlobal dst:reg6, `foo`
  [  18] Call dst:reg5, callee:reg6, this_value:Undefined, foo, arguments:[Double(1.5)]
  [  40] End value:reg5


foo$962620dc right-shift-by-zero.js:2:5
  Registers: 6
  Blocks:    1
  Constants:
    [0] = Int32(0)

block0:
  [   0] ToInt32 dst:reg5, value:arg0
  [  10] Return value:reg5