diff options
Diffstat (limited to 'lib/compiler')
| -rw-r--r-- | lib/compiler/src/beam_bool.erl | 15 | ||||
| -rw-r--r-- | lib/compiler/test/andor_SUITE.erl | 36 |
2 files changed, 42 insertions, 9 deletions
diff --git a/lib/compiler/src/beam_bool.erl b/lib/compiler/src/beam_bool.erl index d8c201a194..ffe5cdb501 100644 --- a/lib/compiler/src/beam_bool.erl +++ b/lib/compiler/src/beam_bool.erl @@ -123,6 +123,12 @@ bopt_block(Reg, Fail, OldIs, [{block,Bl0}|Acc0], St0) -> throw:mixed -> failed; + %% There was a reference to a boolean expression + %% from inside a protected block (try/catch), to + %% a boolean expression outside. + throw:protected_barrier -> + failed; + %% The 'xor' operator was used. We currently don't %% find it worthwile to translate 'xor' operators %% (the code would be clumsy). @@ -414,11 +420,10 @@ bopt_good_args([A|As], Regs) -> bopt_good_args([], _) -> ok. bopt_good_arg({Tag,_}=X, Regs) when Tag =:= x; Tag =:= tmp -> - case gb_trees:get(X, Regs) of - any -> ok; - _Other -> - %%io:format("not any: ~p: ~p\n", [X,_Other]), - throw(mixed) + case gb_trees:lookup(X, Regs) of + {value,any} -> ok; + {value,_} -> throw(mixed); + none -> throw(protected_barrier) end; bopt_good_arg(_, _) -> ok. diff --git a/lib/compiler/test/andor_SUITE.erl b/lib/compiler/test/andor_SUITE.erl index 34609a49f2..6e3ac4d4f4 100644 --- a/lib/compiler/test/andor_SUITE.erl +++ b/lib/compiler/test/andor_SUITE.erl @@ -20,13 +20,14 @@ -export([all/1, t_case/1,t_and_or/1,t_andalso/1,t_orelse/1,inside/1,overlap/1, - combined/1,in_case/1]). + combined/1,in_case/1,before_and_inside_if/1]). -include("test_server.hrl"). all(suite) -> test_lib:recompile(?MODULE), - [t_case,t_and_or,t_andalso,t_orelse,inside,overlap,combined,in_case]. + [t_case,t_and_or,t_andalso,t_orelse,inside,overlap,combined,in_case, + before_and_inside_if]. t_case(Config) when is_list(Config) -> %% We test boolean cases almost but not quite like cases @@ -380,6 +381,35 @@ in_case_1_guard(LenUp, LenDw, LenN, Rotation, Count) -> false -> loop end. +before_and_inside_if(Config) when is_list(Config) -> + ?line no = before_and_inside_if([a], [b], delete), + ?line no = before_and_inside_if([a], [b], x), + ?line no = before_and_inside_if([a], [], delete), + ?line no = before_and_inside_if([a], [], x), + ?line no = before_and_inside_if([], [], delete), + ?line yes = before_and_inside_if([], [], x), + ?line yes = before_and_inside_if([], [b], delete), + ?line yes = before_and_inside_if([], [b], x), + ok. + +%% Thanks to Simon Cornish and Kostis Sagonas. +%% Used to crash beam_bool. +before_and_inside_if(XDo1, XDo2, Do3) -> + Do1 = (XDo1 =/= []), + Do2 = (XDo2 =/= []), + if + %% This expression occurs in a try/catch (protected) + %% block, which cannot refer to variables outside of + %% the block that are boolean expressions. + Do1 =:= true; + Do1 =:= false, Do2 =:= false, Do3 =:= delete -> + no; + true -> + yes + end. + +%% Utilities. + check(V1, V0) -> if V1 /= V0 -> io:fwrite("error: ~w.\n", [V1]), @@ -393,5 +423,3 @@ echo(X) -> X. id(I) -> I. - - |