Dead code removal
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81fc1de479
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@ -1546,7 +1546,6 @@ simplify(Env, {proj, _, {var, X}, I} = Expr) ->
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simplify(Env, {switch, Split}) ->
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simplify(Env, {switch, Split}) ->
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case simpl_switch(Env, [], Split) of
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case simpl_switch(Env, [], Split) of
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nomatch -> {builtin, abort, [{lit, {string, <<"Incomplete patterns">>}}]};
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nomatch -> {builtin, abort, [{lit, {string, <<"Incomplete patterns">>}}]};
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stuck -> {switch, Split};
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Expr -> Expr
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Expr -> Expr
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end;
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end;
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@ -1596,21 +1595,17 @@ nest_catchalls([C = {'case', {var, _}, {nosplit, _}} | _]) -> C;
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nest_catchalls([{'case', P = {var, _}, {split, Type, X, Alts}} | Catchalls]) ->
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nest_catchalls([{'case', P = {var, _}, {split, Type, X, Alts}} | Catchalls]) ->
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{'case', P, {split, Type, X, add_catchalls(Alts, Catchalls)}}.
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{'case', P, {split, Type, X, add_catchalls(Alts, Catchalls)}}.
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-spec simpl_switch(expr_env(), [fcase()], fsplit()) -> fexpr() | stuck | nomatch.
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-spec simpl_switch(expr_env(), [fcase()], fsplit()) -> fexpr() | nomatch.
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simpl_switch(_Env, _, {nosplit, E}) -> E;
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simpl_switch(_Env, _, {nosplit, E}) -> E;
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simpl_switch(Env, Catchalls, {split, Type, X, Alts}) ->
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simpl_switch(Env, Catchalls, {split, Type, X, Alts}) ->
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Alts1 = add_catchalls(Alts, Catchalls),
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Alts1 = add_catchalls(Alts, Catchalls),
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Stuck = {switch, {split, Type, X, Alts1}},
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Stuck = {switch, {split, Type, X, Alts1}},
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case constructor_form(Env, {var, X}) of
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case constructor_form(Env, {var, X}) of
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false -> Stuck;
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false -> Stuck;
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E ->
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E -> simpl_case(Env, E, Alts1)
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case simpl_case(Env, E, Alts1) of
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stuck -> Stuck;
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Res -> Res
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end
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end.
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end.
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-spec simpl_case(expr_env(), fexpr(), [fcase()]) -> fexpr() | stuck | nomatch.
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-spec simpl_case(expr_env(), fexpr(), [fcase()]) -> fexpr() | nomatch.
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simpl_case(_, _, []) -> nomatch;
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simpl_case(_, _, []) -> nomatch;
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simpl_case(Env, E, [{'case', Pat, Body} | Alts]) ->
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simpl_case(Env, E, [{'case', Pat, Body} | Alts]) ->
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case match_pat(Pat, E) of
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case match_pat(Pat, E) of
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@ -1619,7 +1614,6 @@ simpl_case(Env, E, [{'case', Pat, Body} | Alts]) ->
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Env1 = maps:merge(Env, maps:from_list(Binds)),
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Env1 = maps:merge(Env, maps:from_list(Binds)),
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case simpl_switch(Env1, get_catchalls(Alts), Body) of
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case simpl_switch(Env1, get_catchalls(Alts), Body) of
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nomatch -> simpl_case(Env, E, Alts);
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nomatch -> simpl_case(Env, E, Alts);
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stuck -> stuck;
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Body1 -> let_bind(Binds, Body1)
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Body1 -> let_bind(Binds, Body1)
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end
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end
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end.
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end.
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