beam_block: Improve the move optimizations

Here is an example of a move instruction that could not be optimized
away because the {x,2} register was not killed:

  get_tuple_element Reg Pos {x,2}
  .
  .
  .
  move {x,2} {y,0}
  put_list {x,2} nil Any

We can do the optimization if we replace all occurrences of the {x,2}
register as a source with {y,0}:

  get_tuple_element Reg Pos {y,0}
  .
  .
  .
  put_list {y,0} nil Dst

0 files changed, 0 insertions, 0 deletions