diff options
Diffstat (limited to 'lib/compiler/test/bs_match_SUITE.erl')
| -rw-r--r-- | lib/compiler/test/bs_match_SUITE.erl | 120 |
1 files changed, 116 insertions, 4 deletions
diff --git a/lib/compiler/test/bs_match_SUITE.erl b/lib/compiler/test/bs_match_SUITE.erl index 2fe8cd0cff..4bd5e8e2e1 100644 --- a/lib/compiler/test/bs_match_SUITE.erl +++ b/lib/compiler/test/bs_match_SUITE.erl @@ -39,7 +39,8 @@ match_string_opt/1,select_on_integer/1, map_and_binary/1,unsafe_branch_caching/1, bad_literals/1,good_literals/1,constant_propagation/1, - parse_xml/1,get_payload/1,num_slots_different/1]). + parse_xml/1,get_payload/1,escape/1,num_slots_different/1, + beam_bsm/1,guard/1,is_ascii/1,non_opt_eq/1]). -export([coverage_id/1,coverage_external_ignore/2]). @@ -71,7 +72,8 @@ groups() -> match_string_opt,select_on_integer, map_and_binary,unsafe_branch_caching, bad_literals,good_literals,constant_propagation,parse_xml, - get_payload,num_slots_different]}]. + get_payload,escape,num_slots_different, + beam_bsm,guard,is_ascii,non_opt_eq]}]. init_per_suite(Config) -> @@ -799,7 +801,7 @@ multiple_uses_cmp(<<_:16>>, <<_:16>>) -> false. first_after(Data, Offset) -> case byte_size(Data) > Offset of false -> - {First, Rest} = {ok, ok}, + {_First, _Rest} = {ok, ok}, ok; true -> <<_:Offset/binary, Rest/binary>> = Data, @@ -1513,7 +1515,7 @@ is_next_char_whitespace(<<C/utf8,_/binary>>) -> {this_hdr = 17, ext_hdr_opts}). -get_payload(Config) -> +get_payload(_Config) -> <<3445:48>> = do_get_payload(#ext_header{ext_hdr_opts = <<3445:48>>}), {'EXIT',_} = (catch do_get_payload(#ext_header{})), ok. @@ -1524,6 +1526,21 @@ do_get_payload(ExtHdr) -> <<_:13,_:35>> = ExtHdr#ext_header.ext_hdr_opts, ExtHdrOptions. +escape(_Config) -> + 0 = escape(<<>>, 0), + 1 = escape(<<128>>, 0), + 2 = escape(<<128,255>>, 0), + 42 = escape(<<42>>, 0), + 50 = escape(<<42,8>>, 0), + ok. + +escape(<<Byte, Rest/bits>>, Pos) when Byte >= 127 -> + escape(Rest, Pos + 1); +escape(<<Byte, Rest/bits>>, Pos) -> + escape(Rest, Pos + Byte); +escape(<<_Rest/bits>>, Pos) -> + Pos. + %% ERL-490 num_slots_different(_Config) -> Ts = [{<<"de">>, <<"default">>, <<"Remove">>, <<"a">>}, @@ -1557,6 +1574,101 @@ lgettext(<<"de">>, <<"navigation">>, <<"Results">>) -> lgettext(<<"de">>, <<"navigation">>, <<"Resources">>) -> {ok, <<"Ressourcen">>}. +%% Test more code in beam_bsm. +beam_bsm(_Config) -> + true = check_bitstring_list(<<1:1,0:1,1:1,1:1>>, [1,0,1,1]), + false = check_bitstring_list(<<1:1,0:1,1:1,1:1>>, [0]), + + true = bsm_validate_scheme(<<>>), + true = bsm_validate_scheme(<<5,10>>), + false = bsm_validate_scheme(<<5,10,11,12>>), + true = bsm_validate_scheme([]), + true = bsm_validate_scheme([5,10]), + false = bsm_validate_scheme([5,6,7]), + + <<1,2,3>> = bsm_must_save_and_not_save(<<1,2,3>>, []), + D = fun(N) -> 2*N end, + [2,4|<<3>>] = bsm_must_save_and_not_save(<<1,2,3>>, [D,D]), + + ok. + +check_bitstring_list(<<H:1,T1/bitstring>>, [H|T2]) -> + check_bitstring_list(T1, T2); +check_bitstring_list(<<>>, []) -> + true; +check_bitstring_list(_, _) -> + false. + +bsm_validate_scheme([]) -> true; +bsm_validate_scheme([H|T]) -> + case bsm_is_scheme(H) of + true -> bsm_validate_scheme(T); + false -> false + end; +bsm_validate_scheme(<<>>) -> true; +bsm_validate_scheme(<<H, Rest/binary>>) -> + case bsm_is_scheme(H) of + true -> bsm_validate_scheme(Rest); + false -> false + end. + +bsm_is_scheme(Int) -> + Int rem 5 =:= 0. + +%% NOT OPTIMIZED: different control paths use different positions in the binary +bsm_must_save_and_not_save(Bin, []) -> + Bin; +bsm_must_save_and_not_save(<<H,T/binary>>, [F|Fs]) -> + [F(H)|bsm_must_save_and_not_save(T, Fs)]; +bsm_must_save_and_not_save(<<>>, []) -> + []. + +guard(_Config) -> + _Tuple = id({a,b}), + ok = guard_1(<<1,2,3>>, {1,2,3}), + ok = guard_2(<<42>>, #{}), + ok. + +%% Cover handling of #k_put{} in v3_codegen:bsm_rename_ctx/4. +guard_1(<<A,B,C>>, Tuple) when Tuple =:= {A,B,C} -> + ok. + +%% Cover handling of #k_call{} in v3_codegen:bsm_rename_ctx/4. +guard_2(<<_>>, Healing) when Healing#{[] => Healing} =:= #{[] => #{}} -> + ok. + +is_ascii(_Config) -> + true = do_is_ascii(<<>>), + true = do_is_ascii(<<"string">>), + false = do_is_ascii(<<1024/utf8>>), + {'EXIT',{function_clause,_}} = (catch do_is_ascii(<<$A,0:3>>)), + {'EXIT',{function_clause,_}} = (catch do_is_ascii(<<16#80,0:3>>)), + ok. + +do_is_ascii(<<>>) -> + true; +do_is_ascii(<<C,_/binary>>) when C >= 16#80 -> + %% This clause must fail to match if the size of the argument in + %% bits is not divisible by 8. Beware of unsafe optimizations. + false; +do_is_ascii(<<_, T/binary>>) -> + do_is_ascii(T). + +non_opt_eq(_Config) -> + true = non_opt_eq([], <<>>), + true = non_opt_eq([$a], <<$a>>), + false = non_opt_eq([$a], <<$b>>), + ok. + +%% An example from the Efficiency Guide. It used to be not optimized, +%% but now it can be optimized. + +non_opt_eq([H|T1], <<H,T2/binary>>) -> + non_opt_eq(T1, T2); +non_opt_eq([_|_], <<_,_/binary>>) -> + false; +non_opt_eq([], <<>>) -> + true. check(F, R) -> R = F(). |