diff options
Diffstat (limited to 'lib/compiler')
-rw-r--r-- | lib/compiler/src/beam_type.erl | 2 | ||||
-rw-r--r-- | lib/compiler/src/sys_core_fold.erl | 27 | ||||
-rw-r--r-- | lib/compiler/src/v3_core.erl | 26 | ||||
-rw-r--r-- | lib/compiler/test/float_SUITE.erl | 12 | ||||
-rw-r--r-- | lib/compiler/test/inline_SUITE_data/decode1.erl | 48 | ||||
-rw-r--r-- | lib/compiler/test/match_SUITE.erl | 26 | ||||
-rw-r--r-- | lib/compiler/test/num_bif_SUITE.erl | 14 | ||||
-rw-r--r-- | lib/compiler/test/record_SUITE.erl | 39 | ||||
-rw-r--r-- | lib/compiler/test/warnings_SUITE.erl | 17 |
9 files changed, 136 insertions, 75 deletions
diff --git a/lib/compiler/src/beam_type.erl b/lib/compiler/src/beam_type.erl index 66c8816409..3729ccb0da 100644 --- a/lib/compiler/src/beam_type.erl +++ b/lib/compiler/src/beam_type.erl @@ -183,7 +183,7 @@ simplify_float_1([], Ts, Rs, Acc0) -> {Is,Ts}. opt_fmoves([{set,[{x,_}=R],[{fr,_}]=Src,fmove}=I1, - {set,[{y,_}]=Dst,[{x,_}=R],move}=I2|Is], Acc) -> + {set,[_]=Dst,[{x,_}=R],move}=I2|Is], Acc) -> case beam_utils:is_killed_block(R, Is) of false -> opt_fmoves(Is, [I2,I1|Acc]); true -> opt_fmoves(Is, [{set,Dst,Src,fmove}|Acc]) diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index 068478496b..6202f07479 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -1,19 +1,19 @@ %% %% %CopyrightBegin% -%% -%% Copyright Ericsson AB 1999-2009. All Rights Reserved. -%% +%% +%% Copyright Ericsson AB 1999-2010. All Rights Reserved. +%% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in %% compliance with the License. You should have received a copy of the %% Erlang Public License along with this software. If not, it can be %% retrieved online at http://www.erlang.org/. -%% +%% %% Software distributed under the License is distributed on an "AS IS" %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See %% the License for the specific language governing rights and limitations %% under the License. -%% +%% %% %CopyrightEnd% %% %% Purpose : Constant folding optimisation for Core @@ -602,15 +602,23 @@ count_bits_1(Int, Bits) -> count_bits_1(Int bsr 64, Bits+64). %% a rewritten expression consisting of a sequence of %% the arguments only is returned. -useless_call(effect, #c_call{module=#c_literal{val=Mod}, +useless_call(effect, #c_call{anno=Anno, + module=#c_literal{val=Mod}, name=#c_literal{val=Name}, args=Args}=Call) -> A = length(Args), case erl_bifs:is_safe(Mod, Name, A) of false -> case erl_bifs:is_pure(Mod, Name, A) of - true -> add_warning(Call, result_ignored); - false -> ok + true -> + case member(result_not_wanted, Anno) of + false -> + add_warning(Call, result_ignored); + true -> + ok + end; + false -> + ok end, no; true -> @@ -2806,7 +2814,8 @@ format_error({no_effect,{erlang,F,A}}) -> end, flatten(io_lib:format(Fmt, Args)); format_error(result_ignored) -> - "the result of the expression is ignored"; + "the result of the expression is ignored " + "(suppress the warning by assigning the expression to the _ variable)"; format_error(useless_building) -> "a term is constructed, but never used"; format_error(bin_opt_alias) -> diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl index 4ac2196d79..b2f0ac75c7 100644 --- a/lib/compiler/src/v3_core.erl +++ b/lib/compiler/src/v3_core.erl @@ -128,6 +128,7 @@ -record(core, {vcount=0 :: non_neg_integer(), %Variable counter fcount=0 :: non_neg_integer(), %Function counter in_guard=false :: boolean(), %In guard or not. + wanted=true :: boolean(), %Result wanted or not. opts :: [compile:option()], %Options. es=[] :: [error()], %Errors. ws=[] :: [warning()], %Warnings. @@ -580,10 +581,14 @@ expr({'fun',L,{function,F,A},{_,_,_}=Id}, St) -> {#c_var{anno=Lanno++[{id,Id}],name={F,A}},[],St}; expr({'fun',L,{clauses,Cs},Id}, St) -> fun_tq(Id, Cs, L, St); -expr({call,L,{remote,_,M,F},As0}, St0) -> +expr({call,L,{remote,_,M,F},As0}, #core{wanted=Wanted}=St0) -> {[M1,F1|As1],Aps,St1} = safe_list([M,F|As0], St0), Lanno = lineno_anno(L, St1), - {#icall{anno=#a{anno=Lanno},module=M1,name=F1,args=As1},Aps,St1}; + Anno = case Wanted of + false -> [result_not_wanted|Lanno]; + true -> Lanno + end, + {#icall{anno=#a{anno=Anno},module=M1,name=F1,args=As1},Aps,St1}; expr({call,Lc,{atom,Lf,F},As0}, St0) -> {As1,Aps,St1} = safe_list(As0, St0), Op = #c_var{anno=lineno_anno(Lf, St1),name={F,length(As1)}}, @@ -596,23 +601,28 @@ expr({call,L,FunExp,As0}, St0) -> expr({match,L,P0,E0}, St0) -> %% First fold matches together to create aliases. {P1,E1} = fold_match(E0, P0), - {E2,Eps,St1} = novars(E1, St0), + St1 = case P1 of + {var,_,'_'} -> St0#core{wanted=false}; + _ -> St0 + end, + {E2,Eps,St2} = novars(E1, St1), + St3 = St2#core{wanted=St0#core.wanted}, P2 = try - pattern(P1, St1) + pattern(P1, St3) catch throw:Thrown -> Thrown end, - {Fpat,St2} = new_var(St1), + {Fpat,St4} = new_var(St3), Fc = fail_clause([Fpat], c_tuple([#c_literal{val=badmatch},Fpat])), - Lanno = lineno_anno(L, St2), + Lanno = lineno_anno(L, St4), case P2 of nomatch -> - St = add_warning(L, nomatch, St2), + St = add_warning(L, nomatch, St4), {#icase{anno=#a{anno=Lanno}, args=[E2],clauses=[],fc=Fc},Eps,St}; Other when not is_atom(Other) -> - {#imatch{anno=#a{anno=Lanno},pat=P2,arg=E2,fc=Fc},Eps,St2} + {#imatch{anno=#a{anno=Lanno},pat=P2,arg=E2,fc=Fc},Eps,St4} end; expr({op,_,'++',{lc,Llc,E,Qs},More}, St0) -> %% Optimise '++' here because of the list comprehension algorithm. diff --git a/lib/compiler/test/float_SUITE.erl b/lib/compiler/test/float_SUITE.erl index 3d2dbf47e9..07779ddd5a 100644 --- a/lib/compiler/test/float_SUITE.erl +++ b/lib/compiler/test/float_SUITE.erl @@ -1,19 +1,19 @@ %% %% %CopyrightBegin% -%% -%% Copyright Ericsson AB 2002-2009. All Rights Reserved. -%% +%% +%% Copyright Ericsson AB 2002-2010. All Rights Reserved. +%% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in %% compliance with the License. You should have received a copy of the %% Erlang Public License along with this software. If not, it can be %% retrieved online at http://www.erlang.org/. -%% +%% %% Software distributed under the License is distributed on an "AS IS" %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See %% the License for the specific language governing rights and limitations %% under the License. -%% +%% %% %CopyrightEnd% %% -module(float_SUITE). @@ -41,7 +41,7 @@ float_sub(A)-> float_mul(0, _, _)-> ok; float_mul(Iter, A, B) when is_float(A), is_float(B) -> - A*B, + _ = A*B, float_mul(Iter-1, A, B). %% Thanks to Mikael Pettersson and Tobias Lindahl (HiPE). diff --git a/lib/compiler/test/inline_SUITE_data/decode1.erl b/lib/compiler/test/inline_SUITE_data/decode1.erl index d51bedcb2e..9b4fc071a3 100644 --- a/lib/compiler/test/inline_SUITE_data/decode1.erl +++ b/lib/compiler/test/inline_SUITE_data/decode1.erl @@ -1,19 +1,19 @@ %% %% %CopyrightBegin% -%% -%% Copyright Ericsson AB 2006-2009. All Rights Reserved. -%% +%% +%% Copyright Ericsson AB 2006-2010. All Rights Reserved. +%% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in %% compliance with the License. You should have received a copy of the %% Erlang Public License along with this software. If not, it can be %% retrieved online at http://www.erlang.org/. -%% +%% %% Software distributed under the License is distributed on an "AS IS" %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See %% the License for the specific language governing rights and limitations %% under the License. -%% +%% %% %CopyrightEnd% %% %---------------------------------------------------------------------- @@ -37,25 +37,25 @@ FrameList = [89,128,0,8,132,0,26,133,133,0,38,148,94, 128,0,2,129,128,92,128,0,2,0,0,112,128,0, 10,194,69,0,0,0,0,0,18,52,95], - Frame = concat_binary([list_to_binary([89]),list_to_binary([128]), - list_to_binary([0]),list_to_binary([8]), - list_to_binary([132]),list_to_binary([0]), - list_to_binary([26]),list_to_binary([133]), - list_to_binary([133]),list_to_binary([0]), - list_to_binary([38]),list_to_binary([148]), - list_to_binary([94]),list_to_binary([128]), - list_to_binary([0]),list_to_binary([2]), - list_to_binary([129]),list_to_binary([128]), - list_to_binary([92]),list_to_binary([128]), - list_to_binary([0]),list_to_binary([2]), - list_to_binary([0]),list_to_binary([0]), - list_to_binary([112]),list_to_binary([128]), - list_to_binary([0]),list_to_binary([10]), - list_to_binary([194]),list_to_binary([69]), - list_to_binary([0]),list_to_binary([0]), - list_to_binary([0]),list_to_binary([0]), - list_to_binary([0]),list_to_binary([18]), - list_to_binary([52]),list_to_binary([95])]), + Frame = list_to_binary([list_to_binary([89]),list_to_binary([128]), + list_to_binary([0]),list_to_binary([8]), + list_to_binary([132]),list_to_binary([0]), + list_to_binary([26]),list_to_binary([133]), + list_to_binary([133]),list_to_binary([0]), + list_to_binary([38]),list_to_binary([148]), + list_to_binary([94]),list_to_binary([128]), + list_to_binary([0]),list_to_binary([2]), + list_to_binary([129]),list_to_binary([128]), + list_to_binary([92]),list_to_binary([128]), + list_to_binary([0]),list_to_binary([2]), + list_to_binary([0]),list_to_binary([0]), + list_to_binary([112]),list_to_binary([128]), + list_to_binary([0]),list_to_binary([10]), + list_to_binary([194]),list_to_binary([69]), + list_to_binary([0]),list_to_binary([0]), + list_to_binary([0]),list_to_binary([0]), + list_to_binary([0]),list_to_binary([18]), + list_to_binary([52]),list_to_binary([95])]), R = loop(2,0,Frame), {R,R =:= {0,[{ie,112,itu_t_standard,ignore,10,<<194,69,0,0,0,0,0,18,52,95>>}, diff --git a/lib/compiler/test/match_SUITE.erl b/lib/compiler/test/match_SUITE.erl index 20969c0b26..9c4687efa1 100644 --- a/lib/compiler/test/match_SUITE.erl +++ b/lib/compiler/test/match_SUITE.erl @@ -1,19 +1,19 @@ %% %% %CopyrightBegin% -%% -%% Copyright Ericsson AB 2004-2009. All Rights Reserved. -%% +%% +%% Copyright Ericsson AB 2004-2010. All Rights Reserved. +%% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in %% compliance with the License. You should have received a copy of the %% Erlang Public License along with this software. If not, it can be %% retrieved online at http://www.erlang.org/. -%% +%% %% Software distributed under the License is distributed on an "AS IS" %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See %% the License for the specific language governing rights and limitations %% under the License. -%% +%% %% %CopyrightEnd% %% -module(match_SUITE). @@ -21,14 +21,14 @@ -export([all/1, pmatch/1,mixed/1,aliases/1,match_in_call/1, untuplify/1,shortcut_boolean/1,letify_guard/1, - selectify/1]). + selectify/1,underscore/1]). -include("test_server.hrl"). all(suite) -> test_lib:recompile(?MODULE), [pmatch,mixed,aliases,match_in_call,untuplify,shortcut_boolean, - letify_guard,selectify]. + letify_guard,selectify,underscore]. pmatch(Config) when is_list(Config) -> ?line ok = doit(1), @@ -352,4 +352,16 @@ sel_same_value2(V) when V =:= 42; V =:= 43 -> sel_same_value2(_) -> error. +underscore(Config) when is_list(Config) -> + case Config of + [] -> + %% Assignment to _ at the end of a construct. + _ = length(Config); + [_|_] -> + %% Assignment to _ at the end of a construct. + _ = list_to_tuple(Config) + end, + _ = is_list(Config), + ok. + id(I) -> I. diff --git a/lib/compiler/test/num_bif_SUITE.erl b/lib/compiler/test/num_bif_SUITE.erl index c246f56611..912f7366dd 100644 --- a/lib/compiler/test/num_bif_SUITE.erl +++ b/lib/compiler/test/num_bif_SUITE.erl @@ -1,19 +1,19 @@ %% %% %CopyrightBegin% -%% -%% Copyright Ericsson AB 2004-2009. All Rights Reserved. -%% +%% +%% Copyright Ericsson AB 2004-2010. All Rights Reserved. +%% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in %% compliance with the License. You should have received a copy of the %% Erlang Public License along with this software. If not, it can be %% retrieved online at http://www.erlang.org/. -%% +%% %% Software distributed under the License is distributed on an "AS IS" %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See %% the License for the specific language governing rights and limitations %% under the License. -%% +%% %% %CopyrightEnd% %% -module(num_bif_SUITE). @@ -166,7 +166,7 @@ t_list_to_float_safe(Config) when is_list(Config) -> t_list_to_float_risky(Config) when is_list(Config) -> ?line Many_Ones = lists:duplicate(25000, $1), - ?line list_to_float("2."++Many_Ones), + ?line _ = list_to_float("2."++Many_Ones), ?line {'EXIT', {badarg, _}} = (catch list_to_float("2"++Many_Ones)), ok. @@ -186,7 +186,7 @@ t_list_to_integer(Config) when is_list(Config) -> %% Bignums. ?line 123456932798748738738 = list_to_integer("123456932798748738738"), - ?line list_to_integer(lists:duplicate(2000, $1)), + ?line _ = list_to_integer(lists:duplicate(2000, $1)), ok. %% Tests round/1. diff --git a/lib/compiler/test/record_SUITE.erl b/lib/compiler/test/record_SUITE.erl index bd2ffd7f65..f26ff769c7 100644 --- a/lib/compiler/test/record_SUITE.erl +++ b/lib/compiler/test/record_SUITE.erl @@ -1,19 +1,19 @@ %% %% %CopyrightBegin% -%% -%% Copyright Ericsson AB 2003-2009. All Rights Reserved. -%% +%% +%% Copyright Ericsson AB 2003-2010. All Rights Reserved. +%% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in %% compliance with the License. You should have received a copy of the %% Erlang Public License along with this software. If not, it can be %% retrieved online at http://www.erlang.org/. -%% +%% %% Software distributed under the License is distributed on an "AS IS" %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See %% the License for the specific language governing rights and limitations %% under the License. -%% +%% %% %CopyrightEnd% %% %%% Purpose : Test records. @@ -24,7 +24,7 @@ -export([all/1,init_per_testcase/2,fin_per_testcase/2, errors/1,record_test_2/1,record_test_3/1,record_access_in_guards/1, - guard_opt/1,eval_once/1,foobar/1,missing_test_heap/1]). + guard_opt/1,eval_once/1,foobar/1,missing_test_heap/1, nested_access/1]). init_per_testcase(_Case, Config) -> ?line Dog = test_server:timetrap(test_server:minutes(2)), @@ -38,7 +38,7 @@ fin_per_testcase(_Case, Config) -> all(suite) -> test_lib:recompile(?MODULE), [errors,record_test_2,record_test_3,record_access_in_guards, - guard_opt,eval_once,foobar,missing_test_heap]. + guard_opt,eval_once,foobar,missing_test_heap,nested_access]. -record(foo, {a,b,c,d}). -record(bar, {a,b,c,d}). @@ -522,4 +522,29 @@ missing_test_heap_1(A = #foo_rec {foo_1 = _B, foo_3 = C + 1, foo_2 = D + 1}. +-record(nrec0, {name = <<"nested0">>}). +-record(nrec1, {name = <<"nested1">>, nrec0=#nrec0{}}). +-record(nrec2, {name = <<"nested2">>, nrec1=#nrec1{}}). + +nested_access(Config) when is_list(Config) -> + N0 = #nrec0{}, + N1 = #nrec1{}, + N2 = #nrec2{}, + ?line <<"nested0">> = N0#nrec0.name, + ?line <<"nested1">> = N1#nrec1.name, + ?line <<"nested2">> = N2#nrec2.name, + ?line <<"nested0">> = N1#nrec1.nrec0#nrec0.name, + ?line <<"nested0">> = N2#nrec2.nrec1#nrec1.nrec0#nrec0.name, + ?line <<"nested1">> = N2#nrec2.nrec1#nrec1.name, + ?line <<"nested0">> = ((N2#nrec2.nrec1)#nrec1.nrec0)#nrec0.name, + + N1a = N2#nrec2.nrec1#nrec1{name = <<"nested1a">>}, + ?line <<"nested1a">> = N1a#nrec1.name, + + N2a = N2#nrec2.nrec1#nrec1.nrec0#nrec0{name = <<"nested0a">>}, + N2b = ((N2#nrec2.nrec1)#nrec1.nrec0)#nrec0{name = <<"nested0a">>}, + ?line <<"nested0a">> = N2a#nrec0.name, + ?line N2a = N2b, + ok. + id(I) -> I. diff --git a/lib/compiler/test/warnings_SUITE.erl b/lib/compiler/test/warnings_SUITE.erl index 6e60ab88cb..5ed8836c70 100644 --- a/lib/compiler/test/warnings_SUITE.erl +++ b/lib/compiler/test/warnings_SUITE.erl @@ -1,19 +1,19 @@ %% %% %CopyrightBegin% -%% -%% Copyright Ericsson AB 2003-2009. All Rights Reserved. -%% +%% +%% Copyright Ericsson AB 2003-2010. All Rights Reserved. +%% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in %% compliance with the License. You should have received a copy of the %% Erlang Public License along with this software. If not, it can be %% retrieved online at http://www.erlang.org/. -%% +%% %% Software distributed under the License is distributed on an "AS IS" %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See %% the License for the specific language governing rights and limitations %% under the License. -%% +%% %% %CopyrightEnd% %% -module(warnings_SUITE). @@ -375,7 +375,12 @@ effect(Config) when is_list(Config) -> comp_op -> X =:= 2; cookie -> - erlang:get_cookie() + erlang:get_cookie(); + result_ignore -> + _ = list_to_integer(X); + warn_lc_4 -> + %% No warning because of assignment to _. + [_ = abs(Z) || Z <- [1,2,3]] end, ok. |