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Diffstat (limited to 'lib/compiler')
| -rw-r--r-- | lib/compiler/src/beam_dead.erl | 10 |
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); |