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elixir_inliner.erl
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elixir_inliner.erl
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% Responsible for code inlining and optimizations in general.
-module(elixir_inliner).
-export([binary_op/8,get_ivar/3,set_ivar/4,set_ivars/4,method_call/5]).
-include("elixir.hrl").
method_call(Line, Expr, Name, TArgs, Else) ->
Snapshot = case Expr of
{constant,Line,Constant} ->
try
elixir_constants:lookup(Constant)
catch
error:{no_module,Constant} -> []
end;
_ -> []
end,
case Snapshot of
[] -> Else;
_ ->
Module = Snapshot#elixir_module__.name,
Reverse = ?ELIXIR_WRAP_CALL(Line, Module, '__module__', [{nil,Line}]),
?ELIXIR_WRAP_CALL(Line, Module, Name, [Reverse|TArgs])
end.
binary_op(Line, Left, Right, TLeft, TRight, Op, S, SF) ->
Optimize = S#elixir_scope.assign or S#elixir_scope.guard,
% Check if left side is an integer or float, if so, dispatch straight to the operator
case Optimize orelse is_number_form(TLeft) orelse is_var_form(TLeft, S, fun({_,X}) -> is_number_form(X) end) of
true -> { {op, Line, Op, TLeft, TRight}, SF };
false ->
Args = [TRight],
% Check if left side surely requires a method dispatch, if not, create a case expression
case is_op_call_form(element(1, Left)) orelse is_var_form(TLeft, S, fun({X,_}) -> is_op_call_form(element(1, X)) end) of
true -> { elixir_tree_helpers:build_method_call(Op, Line, Args, TLeft), SF };
false ->
{ Var, NS } = elixir_tree_helpers:build_var_name(Line, SF),
Match = [{match, Line, Var, TLeft}],
True = [{atom,Line,true}],
False = [{atom,Line,false}],
IsNumber = {call,Line,{atom,Line,is_number},Match},
{ { 'case', Line, IsNumber, [
{ clause, Line, True, [], [{op, Line, Op, Var, TRight}] },
{ clause, Line, False, [], [elixir_tree_helpers:build_method_call(Op, Line, Args, Var)] }
] }, NS }
end
end.
get_ivar(Line, Name, Else) ->
{'try',Line,
[{call,Line,
{remote,Line,{atom,Line,elixir_helpers},{atom,Line,orddict_find}},
[{atom,Line,Name},{call,Line,{atom,Line,element},[{integer,Line,3},{var,Line,self}]}]
}],
[],
else_clause(Line, Else),
[]
}.
set_ivar(Line, [{atom,_,_} = Left, Right], Else, S) ->
Element = [{integer,Line,3},{var,Line,self}],
{ Var, FS } = elixir_tree_helpers:build_var_name(Line, S),
Call = {block,Line,[
{match, Line, Var, Right},
{'try',Line,
[{call,Line,{atom,Line,setelement},Element ++
[{call,Line,
{remote,Line,{atom,Line,orddict},{atom,Line,store}},
[Left, Var, {call,Line,{atom,Line,element},Element}]
}]
}],
[],
else_clause(Line, Else),
[]
}
]},
{ Call, FS };
set_ivar(_Line, _Expr, Else, S) ->
{ Else, S }.
% If it is a raw, already ordered dict, optimize it.
set_ivars(Line, [{tuple,_,[{atom,_,_elixir_orddict__},{cons,_,_,_} = Dict]}], Else, S) ->
Element = [{integer,Line,3},{var,Line,self}],
{ Var, FS } = elixir_tree_helpers:build_var_name(Line, S),
Call = {block,Line,[
{match, Line, Var, Dict},
{'try',Line,
[{call,Line,{atom,Line,setelement},Element ++
[{call,Line,
{remote,Line,{atom,Line,elixir_helpers},{atom,Line,orddict_merge}},
[{call,Line,{atom,Line,element},Element}, Var]
}]
}],
[],
else_clause(Line, Else),
[]
}
]},
{ Call, FS };
set_ivars(_Line, _Expr, Else, S) ->
{ Else, S }.
% Helpers
else_clause(Line, Else) ->
[{clause,Line,
[{tuple,Line,[{atom,Line,error},{var,Line,'_'},{var,Line,'_'}]}],[],[Else]
}].
is_number_form({integer, _, _}) -> true;
is_number_form({float, _, _}) -> true;
is_number_form({op, _, Op, _ }) when Op == '+'; Op == '-' -> true;
is_number_form({op, _, Op, Left, _ }) when Op == '+'; Op == '-'; Op == '*'; Op == '/'; Op == 'div'; Op == 'rem' -> is_number_form(Left);
is_number_form(_) -> false.
is_op_call_form(string) -> true;
is_op_call_form(regexp) -> true;
is_op_call_form(char_list) -> true;
is_op_call_form(list) -> true;
is_op_call_form(tuple) -> true;
is_op_call_form(atom) -> true;
is_op_call_form(function) -> true;
is_op_call_form(orddict) -> true;
is_op_call_form(bin) -> true;
is_op_call_form(interpolated_string) -> true;
is_op_call_form(interpolated_regexp) -> true;
is_op_call_form(interpolated_atom) -> true;
is_op_call_form(interpolated_char_list) -> true;
is_op_call_form(_) -> false.
is_var_form({ var, _, Name }, #elixir_scope{assigned_vars=Dict}, Function) ->
case dict:find(Name, Dict) of
{ ok, Var } -> Function(Var);
error -> false
end;
is_var_form(_, _, _) -> false.