============ after processor `usage_analysis` ================

[variant baseline]
pub fun Trafo::incr_ref($t0|r: &mut u64) {
     var $t1: u64
     var $t2: u64
     var $t3: u64
  0: trace_local[r]($t0)
  1: $t1 := read_ref($t0)
  2: $t2 := 1
  3: $t3 := +($t1, $t2)
  4: write_ref($t0, $t3)
  5: trace_local[r]($t0)
  6: return ()
}


[variant baseline]
pub fun Trafo::use_incr_ref($t0|b: bool): Trafo::R {
     var $t1|r1: Trafo::R
     var $t2|r2: Trafo::R
     var $t3|r_ref: &mut Trafo::R
     var $t4|tmp#$4: &mut Trafo::R
     var $t5: u64
     var $t6: u64
     var $t7: &mut Trafo::R
     var $t8: &mut Trafo::R
     var $t9: &mut u64
     var $t10: Trafo::R
  0: trace_local[b]($t0)
  1: $t5 := 1
  2: $t1 := pack Trafo::R($t5)
  3: trace_local[r1]($t1)
  4: $t6 := 2
  5: $t2 := pack Trafo::R($t6)
  6: trace_local[r2]($t2)
  7: if ($t0) goto 10 else goto 8
  8: label L1
  9: goto 15
 10: label L0
 11: $t7 := borrow_local($t1)
 12: $t4 := $t7
 13: trace_local[tmp#$4]($t7)
 14: goto 19
 15: label L2
 16: $t8 := borrow_local($t2)
 17: $t4 := $t8
 18: trace_local[tmp#$4]($t8)
 19: label L3
 20: trace_local[r_ref]($t4)
 21: $t9 := borrow_field<Trafo::R>.x($t4)
 22: Trafo::incr_ref($t9)
 23: write_back[Reference($t4)]($t9)
 24: write_back[LocalRoot($t1)]($t4)
 25: write_back[LocalRoot($t2)]($t4)
 26: $t10 := move($t2)
 27: trace_return[0]($t10)
 28: return $t10
}