1 files changed, 129 insertions, 0 deletions
diff --git a/lib/compiler/test/beam_bool_SUITE.erl b/lib/compiler/test/beam_bool_SUITE.erl
new file mode 100644
index 0000000000..413d03b0ff
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+++ b/lib/compiler/test/beam_bool_SUITE.erl
@@ -0,0 +1,129 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2015-2016. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(beam_bool_SUITE).
+
+-export([all/0,suite/0,groups/0,init_per_suite/1,end_per_suite/1,
+	 init_per_group/2,end_per_group/2,
+	 before_and_inside_if/1,
+	 scotland/1]).
+
+suite() ->
+    [{ct_hooks,[ts_install_cth]}].
+
+all() ->
+    test_lib:recompile(?MODULE),
+    [{group,p}].
+
+groups() ->
+    [{p,[parallel],
+      [before_and_inside_if,
+       scotland
+      ]}].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+before_and_inside_if(_Config) ->
+    no = before_and_inside_if([a], [b], delete),
+    no = before_and_inside_if([a], [b], x),
+    no = before_and_inside_if([a], [], delete),
+    no = before_and_inside_if([a], [], x),
+    no = before_and_inside_if([], [], delete),
+    yes = before_and_inside_if([], [], x),
+    yes = before_and_inside_if([], [b], delete),
+    yes = before_and_inside_if([], [b], x),
+
+    {ch1,ch2} = before_and_inside_if_2([a], [b], blah),
+    {ch1,ch2} = before_and_inside_if_2([a], [b], xx),
+    {ch1,ch2} = before_and_inside_if_2([a], [], blah),
+    {ch1,ch2} = before_and_inside_if_2([a], [], xx),
+    {no,no} = before_and_inside_if_2([], [b], blah),
+    {no,no} = before_and_inside_if_2([], [b], xx),
+    {ch1,no} = before_and_inside_if_2([], [], blah),
+    {no,ch2} = before_and_inside_if_2([], [], xx),
+    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.
+
+%% Thanks to Simon Cornish.
+%% Used to generate code that would not set {y,0} on
+%% all paths before its use (and therefore fail
+%% validation by the beam_validator).
+before_and_inside_if_2(XDo1, XDo2, Do3) ->
+    Do1    = (XDo1 =/= []),
+    Do2    = (XDo2 =/= []),
+    CH1 = if Do1 == true;
+	     Do1 == false,Do2==false,Do3 == blah ->
+		  ch1;
+	     true ->
+		  no
+	  end,
+    CH2 = if Do1 == true;
+	     Do1 == false,Do2==false,Do3 == xx ->
+		  ch2;
+	     true ->
+		  no
+	  end,
+    {CH1,CH2}.
+
+
+%% beam_bool would remove the initialization of {y,0}.
+%% (Thanks to Thomas Arts and QuickCheck.)
+
+scotland(_Config) ->
+    million = do_scotland(placed),
+    {'EXIT',{{badmatch,placed},_}} = (catch do_scotland(false)),
+    {'EXIT',{{badmatch,placed},_}} = (catch do_scotland(true)),
+    {'EXIT',{{badmatch,placed},_}} = (catch do_scotland(echo)),
+    ok.
+
+do_scotland(Echo) ->
+  found(case Echo of
+	    Echo when true; Echo, Echo, Echo ->
+		Echo;
+	    echo ->
+		[]
+	end,
+	Echo = placed).
+
+found(_, _) -> million.