diff options
Diffstat (limited to 'lib/compiler/src/beam_utils.erl')
| -rw-r--r-- | lib/compiler/src/beam_utils.erl | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/lib/compiler/src/beam_utils.erl b/lib/compiler/src/beam_utils.erl index bd1423cb40..6f20fc94de 100644 --- a/lib/compiler/src/beam_utils.erl +++ b/lib/compiler/src/beam_utils.erl @@ -380,9 +380,16 @@ check_liveness(R, [{bs_init,_,_,none,Ss,Dst}|Is], St) -> check_liveness(R, [{bs_init,_,_,Live,Ss,Dst}|Is], St) -> case R of {x,X} -> - case X < Live orelse member(R, Ss) of - true -> {used,St}; - false -> {killed,St} + case member(R, Ss) of + true -> + {used,St}; + false -> + if + X < Live -> + not_used(check_liveness(R, Is, St)); + true -> + {killed,St} + end end; {y,_} -> case member(R, Ss) of |