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-rw-r--r--lib/compiler/src/beam_dead.erl10
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/compiler/src/beam_dead.erl b/lib/compiler/src/beam_dead.erl
index 8ea949425e..9087586b58 100644
--- a/lib/compiler/src/beam_dead.erl
+++ b/lib/compiler/src/beam_dead.erl
@@ -379,6 +379,14 @@ backward([{kill,_}=I|Is], D, [{line,_},Exit|_]=Acc) ->
false -> backward(Is, D, [I|Acc]);
true -> backward(Is, D, Acc)
end;
+backward([{bif,'or',{f,To0},[Dst,{atom,false}],Dst}=I|Is], D,
+ [{test,is_eq_exact,{f,To},[Dst,{atom,true}]}|_]=Acc) ->
+ case shortcut_label(To0, D) of
+ To ->
+ backward(Is, D, Acc);
+ _ ->
+ backward(Is, D, [I|Acc])
+ end;
backward([I|Is], D, Acc) ->
backward(Is, D, [I|Acc]);
backward([], _D, Acc) -> Acc.
@@ -397,6 +405,8 @@ shortcut_select_list([Lit,{f,To0}|T], Reg, D, Acc) ->
shortcut_select_list(T, Reg, D, [{f,To},Lit|Acc]);
shortcut_select_list([], _, _, Acc) -> reverse(Acc).
+shortcut_label(0, _) ->
+ 0;
shortcut_label(To0, D) ->
case beam_utils:code_at(To0, D) of
[{jump,{f,To}}|_] -> shortcut_label(To, D);