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Diffstat (limited to 'lib/compiler/src/beam_utils.erl')
| -rw-r--r-- | lib/compiler/src/beam_utils.erl | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/lib/compiler/src/beam_utils.erl b/lib/compiler/src/beam_utils.erl index dc8079d0b7..45cdf8a659 100644 --- a/lib/compiler/src/beam_utils.erl +++ b/lib/compiler/src/beam_utils.erl @@ -489,10 +489,13 @@ check_liveness(R, [{bs_context_to_binary,S}|Is], St) -> S -> {used,St}; _ -> check_liveness(R, Is, St) end; -check_liveness(R, [{loop_rec,{f,_},{x,0}}|Is], St) -> +check_liveness(R, [{loop_rec,{f,_},{x,0}}|_], St) -> case R of - {x,_} -> {killed,St}; - _ -> check_liveness(R, Is, St) + {x,_} -> + {killed,St}; + _ -> + %% y register. Rarely happens. Be very conversative. + {unknown,St} end; check_liveness(R, [{loop_rec_end,{f,Fail}}|_], St) -> check_liveness_at(R, Fail, St); |