Merge branch 'bjorn/remove-is_constant-vestiges/OTP-6454' into maint

* bjorn/remove-is_constant-vestiges/OTP-6454:
  HiPE: Remove support for is_constant/1
  erl_lint: Remove handling of constant/1
  erl_bif_types: Remove type for is_constant/1
  erl_eval: Remove support for is_constant/1
  Remove support for is_constant/1 in ms_transform
  Remove references to is_constant/1 from the match spec documentation

14 files changed, 11 insertions, 47 deletions

diff --git a/erts/doc/src/match_spec.xml b/erts/doc/src/match_spec.xml
index f0390c9db8..cd2b3abc1e 100644
--- a/erts/doc/src/match_spec.xml
+++ b/erts/doc/src/match_spec.xml
@@ -75,7 +75,7 @@
       <item>MatchCondition ::= { GuardFunction } | 
        { GuardFunction, ConditionExpression, ... }
       </item>
-      <item>BoolFunction ::= <c><![CDATA[is_atom]]></c> | <c><![CDATA[is_constant]]></c> |
+      <item>BoolFunction ::= <c><![CDATA[is_atom]]></c> |
       <c><![CDATA[is_float]]></c> | <c><![CDATA[is_integer]]></c> | <c><![CDATA[is_list]]></c> |
       <c><![CDATA[is_number]]></c> | <c><![CDATA[is_pid]]></c> | <c><![CDATA[is_port]]></c> |
       <c><![CDATA[is_reference]]></c> | <c><![CDATA[is_tuple]]></c> | <c><![CDATA[is_binary]]></c> |
@@ -133,7 +133,7 @@
       <item>MatchCondition ::= { GuardFunction } |
        { GuardFunction, ConditionExpression, ... }
       </item>
-      <item>BoolFunction ::= <c><![CDATA[is_atom]]></c> | <c><![CDATA[is_constant]]></c> |
+      <item>BoolFunction ::= <c><![CDATA[is_atom]]></c> |
       <c><![CDATA[is_float]]></c> | <c><![CDATA[is_integer]]></c> | <c><![CDATA[is_list]]></c> |
       <c><![CDATA[is_number]]></c> | <c><![CDATA[is_pid]]></c> | <c><![CDATA[is_port]]></c> |
       <c><![CDATA[is_reference]]></c> | <c><![CDATA[is_tuple]]></c> | <c><![CDATA[is_binary]]></c> |
@@ -172,7 +172,7 @@
       <title>Functions allowed in all types of match specifications</title>
       <p>The different functions allowed in <c><![CDATA[match_spec]]></c> work like this:
         </p>
-      <p><em>is_atom, is_constant, is_float, is_integer, is_list, is_number, is_pid, is_port, is_reference, is_tuple, is_binary, is_function: </em> Like the corresponding guard tests in
+      <p><em>is_atom, is_float, is_integer, is_list, is_number, is_pid, is_port, is_reference, is_tuple, is_binary, is_function: </em> Like the corresponding guard tests in
         Erlang, return <c><![CDATA[true]]></c> or <c><![CDATA[false]]></c>.
         </p>
       <p><em>is_record: </em>Takes an additional parameter, which SHALL
diff --git a/lib/hipe/cerl/cerl_hipe_primops.hrl b/lib/hipe/cerl/cerl_hipe_primops.hrl
index 36b1b62901..1d82f7bfc7 100644
--- a/lib/hipe/cerl/cerl_hipe_primops.hrl
+++ b/lib/hipe/cerl/cerl_hipe_primops.hrl
@@ -59,7 +59,6 @@
 -define(PRIMOP_IS_ATOM, 'is_atom').		% arity 1
 -define(PRIMOP_IS_BIGNUM, 'is_bignum').		% arity 1
 -define(PRIMOP_IS_BINARY, 'is_binary').		% arity 1
--define(PRIMOP_IS_CONSTANT, 'is_constant').	% arity 1
 -define(PRIMOP_IS_FIXNUM, 'is_fixnum').		% arity 1
 -define(PRIMOP_IS_FLOAT, 'is_float').		% arity 1
 -define(PRIMOP_IS_FUNCTION, 'is_function').	% arity 1
diff --git a/lib/hipe/cerl/cerl_hipeify.erl b/lib/hipe/cerl/cerl_hipeify.erl
index 8f6c3561c9..89b4ec147d 100644
--- a/lib/hipe/cerl/cerl_hipeify.erl
+++ b/lib/hipe/cerl/cerl_hipeify.erl
@@ -392,7 +392,6 @@ call_to_primop(erlang, '=<', 2) -> {yes, ?PRIMOP_LE};
 call_to_primop(erlang, '>=', 2) -> {yes, ?PRIMOP_GE};
 call_to_primop(erlang, is_atom, 1) -> {yes, ?PRIMOP_IS_ATOM};
 call_to_primop(erlang, is_binary, 1) -> {yes, ?PRIMOP_IS_BINARY};
-call_to_primop(erlang, is_constant, 1) -> {yes, ?PRIMOP_IS_CONSTANT};
 call_to_primop(erlang, is_float, 1) -> {yes, ?PRIMOP_IS_FLOAT};
 call_to_primop(erlang, is_function, 1) -> {yes, ?PRIMOP_IS_FUNCTION};
 call_to_primop(erlang, is_integer, 1) -> {yes, ?PRIMOP_IS_INTEGER};
diff --git a/lib/hipe/cerl/cerl_messagean.erl b/lib/hipe/cerl/cerl_messagean.erl
index 6dd93adaa3..b9f82f2a43 100644
--- a/lib/hipe/cerl/cerl_messagean.erl
+++ b/lib/hipe/cerl/cerl_messagean.erl
@@ -1083,7 +1083,6 @@ is_imm_op(erlang, is_alive, 0) -> true;
 is_imm_op(erlang, is_atom, 1) -> true;
 is_imm_op(erlang, is_binary, 1) -> true;
 is_imm_op(erlang, is_builtin, 3) -> true;
-is_imm_op(erlang, is_constant, 1) -> true;
 is_imm_op(erlang, is_float, 1) -> true;
 is_imm_op(erlang, is_function, 1) -> true;
 is_imm_op(erlang, is_integer, 1) -> true;
diff --git a/lib/hipe/cerl/cerl_to_icode.erl b/lib/hipe/cerl/cerl_to_icode.erl
index 362c427cbe..089e3f021e 100644
--- a/lib/hipe/cerl/cerl_to_icode.erl
+++ b/lib/hipe/cerl/cerl_to_icode.erl
@@ -88,7 +88,6 @@
 -define(TYPE_IS_ATOM, atom).
 -define(TYPE_IS_BIGNUM, bignum).
 -define(TYPE_IS_BINARY, binary).
--define(TYPE_IS_CONSTANT, constant).
 -define(TYPE_IS_FIXNUM, fixnum).
 -define(TYPE_IS_FLOAT, float).
 -define(TYPE_IS_FUNCTION, function).
@@ -2051,7 +2050,6 @@ is_record_test(T, A, N, True, False, Ctxt, Env, S) ->
 type_test(?PRIMOP_IS_ATOM) -> ?TYPE_IS_ATOM;
 type_test(?PRIMOP_IS_BIGNUM) -> ?TYPE_IS_BIGNUM;
 type_test(?PRIMOP_IS_BINARY) -> ?TYPE_IS_BINARY;
-type_test(?PRIMOP_IS_CONSTANT) -> ?TYPE_IS_CONSTANT;
 type_test(?PRIMOP_IS_FIXNUM) -> ?TYPE_IS_FIXNUM;
 type_test(?PRIMOP_IS_FLOAT) -> ?TYPE_IS_FLOAT;
 type_test(?PRIMOP_IS_FUNCTION) -> ?TYPE_IS_FUNCTION;
@@ -2082,7 +2080,6 @@ is_bool_op(Op, A) when is_atom(Op), is_integer(A) -> false.
 is_type_test(?PRIMOP_IS_ATOM, 1) -> true;
 is_type_test(?PRIMOP_IS_BIGNUM, 1) -> true;
 is_type_test(?PRIMOP_IS_BINARY, 1) -> true;
-is_type_test(?PRIMOP_IS_CONSTANT, 1) -> true;
 is_type_test(?PRIMOP_IS_FIXNUM, 1) -> true;
 is_type_test(?PRIMOP_IS_FLOAT, 1) -> true;
 is_type_test(?PRIMOP_IS_FUNCTION, 1) -> true;
diff --git a/lib/hipe/cerl/erl_bif_types.erl b/lib/hipe/cerl/erl_bif_types.erl
index cee399e861..825d79bb3c 100644
--- a/lib/hipe/cerl/erl_bif_types.erl
+++ b/lib/hipe/cerl/erl_bif_types.erl
@@ -54,7 +54,6 @@
 		    t_cons/2,
 		    t_cons_hd/1,
 		    t_cons_tl/1,
-		    t_constant/0,
 		    t_fixnum/0,
 		    t_non_neg_fixnum/0,
 		    t_pos_fixnum/0,
@@ -81,7 +80,6 @@
 		    t_is_bitstr/1,
 		    t_is_boolean/1,
 		    t_is_cons/1,
-		    t_is_constant/1,
 		    t_is_float/1,
 		    t_is_float/1,
 		    t_is_fun/1,
@@ -845,11 +843,6 @@ type(erlang, is_boolean, 1, Xs) ->
   strict(arg_types(erlang, is_boolean, 1), Xs, Fun);
 type(erlang, is_builtin, 3, Xs) ->
   strict(arg_types(erlang, is_builtin, 3), Xs, fun (_) -> t_boolean() end);
-type(erlang, is_constant, 1, Xs) ->
-  Fun = fun (X) ->
-	    check_guard(X, fun (Y) -> t_is_constant(Y) end, t_constant())
-	end,
-  strict(arg_types(erlang, is_constant, 1), Xs, Fun);
 type(erlang, is_float, 1, Xs) ->
   Fun = fun (X) ->
 	    check_guard(X, fun (Y) -> t_is_float(Y) end, t_float())
@@ -3567,8 +3560,6 @@ arg_types(erlang, is_boolean, 1) ->
   [t_any()];
 arg_types(erlang, is_builtin, 3) ->
   [t_atom(), t_atom(), t_arity()];
-arg_types(erlang, is_constant, 1) ->
-  [t_any()];
 arg_types(erlang, is_float, 1) ->
   [t_any()];
 arg_types(erlang, is_function, 1) ->
diff --git a/lib/hipe/icode/hipe_beam_to_icode.erl b/lib/hipe/icode/hipe_beam_to_icode.erl
index 992f387bd5..2d2b414a70 100644
--- a/lib/hipe/icode/hipe_beam_to_icode.erl
+++ b/lib/hipe/icode/hipe_beam_to_icode.erl
@@ -465,10 +465,6 @@ trans_fun([{test,is_nil,{f,Lbl},[Arg]}|Instructions], Env) ->
 trans_fun([{test,is_binary,{f,Lbl},[Arg]}|Instructions], Env) ->
   {Code,Env1} = trans_type_test(binary,Lbl,Arg,Env),
   [Code | trans_fun(Instructions,Env1)];
-%%--- is_constant ---
-trans_fun([{test,is_constant,{f,Lbl},[Arg]}|Instructions], Env) ->
-  {Code,Env1} = trans_type_test(constant,Lbl,Arg,Env),
-  [Code | trans_fun(Instructions,Env1)];
 %%--- is_list ---
 trans_fun([{test,is_list,{f,Lbl},[Arg]}|Instructions], Env) ->
   {Code,Env1} = trans_type_test(list,Lbl,Arg,Env),
diff --git a/lib/hipe/icode/hipe_icode_inline_bifs.erl b/lib/hipe/icode/hipe_icode_inline_bifs.erl
index 27296dcad5..9a2fb7846a 100644
--- a/lib/hipe/icode/hipe_icode_inline_bifs.erl
+++ b/lib/hipe/icode/hipe_icode_inline_bifs.erl
@@ -29,7 +29,7 @@
 
 %% Currently inlined BIFs:
 %% and, or, xor, not, <, >, >=, =<, ==, /=, =/=, =:=
-%% is_atom, is_boolean, is_binary, is_constant, is_float, is_function,
+%% is_atom, is_boolean, is_binary, is_float, is_function,
 %% is_integer, is_list, is_pid, is_port, is_reference, is_tuple
 
 -module(hipe_icode_inline_bifs).
@@ -131,7 +131,6 @@ is_type_test(Name) ->
     is_boolean -> {true, boolean};
     is_function -> {true, function};	       
     is_reference -> {true, reference};
-    is_constant -> {true, constant};
     is_port -> {true, port};
     _ -> false
   end.
diff --git a/lib/hipe/icode/hipe_icode_type.erl b/lib/hipe/icode/hipe_icode_type.erl
index 3f9488d7c3..cae4325b9e 100644
--- a/lib/hipe/icode/hipe_icode_type.erl
+++ b/lib/hipe/icode/hipe_icode_type.erl
@@ -899,9 +899,7 @@ test_type0(list, T) ->
 test_type0(cons, T) ->
   t_is_cons(T);
 test_type0(nil, T) ->
-  t_is_nil(T);
-test_type0(constant, T) ->
-  t_is_constant(T).
+  t_is_nil(T).
 
 
 true_branch_info(integer) ->
@@ -940,8 +938,6 @@ true_branch_info(nil) ->
   t_nil();
 true_branch_info(boolean) ->
   t_boolean();
-true_branch_info(constant) ->
-  t_constant();
 true_branch_info(T) ->
   exit({?MODULE,unknown_typetest,T}).
 
diff --git a/lib/stdlib/doc/src/ms_transform.xml b/lib/stdlib/doc/src/ms_transform.xml
index f81f8bda96..ad5f8bd5ac 100644
--- a/lib/stdlib/doc/src/ms_transform.xml
+++ b/lib/stdlib/doc/src/ms_transform.xml
@@ -308,7 +308,7 @@ ets:select(emp_tab, ets:fun2ms(
       Erlang code. Also arithmetics is allowed, as well as ordinary guard
       bif's. Here's a list of bif's and expressions:</p>
     <list type="bulleted">
-      <item>The type tests: is_atom, is_constant, is_float, is_integer,
+      <item>The type tests: is_atom, is_float, is_integer,
        is_list, is_number, is_pid, is_port, is_reference, is_tuple,
        is_binary, is_function, is_record</item>
       <item>The boolean operators: not, and, or, andalso, orelse </item>
@@ -318,7 +318,7 @@ ets:select(emp_tab, ets:fun2ms(
       <item>The guard bif's: abs, element, hd, length, node, round, size, tl, 
        trunc, self</item>
       <item>The obsolete type test (only in guards):
-       atom, constant, float, integer,
+       atom, float, integer,
        list, number, pid, port, reference, tuple,
        binary, function, record</item>
     </list>
diff --git a/lib/stdlib/src/erl_eval.erl b/lib/stdlib/src/erl_eval.erl
index bf3c7b3504..95ba6b1096 100644
--- a/lib/stdlib/src/erl_eval.erl
+++ b/lib/stdlib/src/erl_eval.erl
@@ -947,7 +947,6 @@ type_test(integer) -> is_integer;
 type_test(float) -> is_float;
 type_test(number) -> is_number;
 type_test(atom) -> is_atom;
-type_test(constant) -> is_constant;
 type_test(list) -> is_list;
 type_test(tuple) -> is_tuple;
 type_test(pid) -> is_pid;
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl
index cfbcf54d95..a1af0057ca 100644
--- a/lib/stdlib/src/erl_lint.erl
+++ b/lib/stdlib/src/erl_lint.erl
@@ -3436,17 +3436,11 @@ obsolete_guard({call,Line,{atom,Lr,F},As}, St0) ->
 	false ->
 	    deprecated_function(Line, erlang, F, As, St0);
 	true ->
-	    St1 = case F of
-		      constant ->
-			  deprecated_function(Lr, erlang, is_constant, As, St0);
-		      _ ->
-			  St0
-		  end,
-	    case is_warn_enabled(obsolete_guard, St1) of
+	    case is_warn_enabled(obsolete_guard, St0) of
 		true ->
-		    add_warning(Lr,{obsolete_guard, {F, Arity}}, St1);
+		    add_warning(Lr,{obsolete_guard, {F, Arity}}, St0);
 		false ->
-		    St1
+		    St0
 	    end
     end;
 obsolete_guard(_G, St) ->
diff --git a/lib/stdlib/src/ms_transform.erl b/lib/stdlib/src/ms_transform.erl
index 63b397f3a5..4389fd457c 100644
--- a/lib/stdlib/src/ms_transform.erl
+++ b/lib/stdlib/src/ms_transform.erl
@@ -881,7 +881,6 @@ translate_language_element(Atom) ->
     end.
 
 old_bool_test(atom,1) -> is_atom;
-old_bool_test(constant,1) -> is_constant;
 old_bool_test(float,1) -> is_float;
 old_bool_test(integer,1) -> is_integer;
 old_bool_test(list,1) -> is_list;
@@ -896,7 +895,6 @@ old_bool_test(record,2) -> is_record;
 old_bool_test(_,_) -> undefined.
 
 bool_test(is_atom,1) -> true;
-bool_test(is_constant,1) -> true;
 bool_test(is_float,1) -> true;
 bool_test(is_integer,1) -> true;
 bool_test(is_list,1) -> true;
diff --git a/lib/stdlib/test/ms_transform_SUITE.erl b/lib/stdlib/test/ms_transform_SUITE.erl
index c9688354b1..a17307b07b 100644
--- a/lib/stdlib/test/ms_transform_SUITE.erl
+++ b/lib/stdlib/test/ms_transform_SUITE.erl
@@ -455,7 +455,6 @@ old_guards(Config) when is_list(Config) ->
     ?line setup(Config),
     Tests = [
 	     {atom,is_atom},
-	     {constant,is_constant},
 	     {float,is_float},
 	     {integer,is_integer},
 	     {list,is_list},
@@ -490,7 +489,6 @@ old_guards(Config) when is_list(Config) ->
     ?line [{'$1',[{is_integer,'$1'},
 		  {is_float,'$1'},
 		  {is_atom,'$1'},
-		  {is_constant,'$1'},
 		  {is_list,'$1'},
 		  {is_number,'$1'},
 		  {is_pid,'$1'},
@@ -502,7 +500,7 @@ old_guards(Config) when is_list(Config) ->
 	    [true]}] =
 	compile_and_run(RD, <<
 			     "ets:fun2ms(fun(X) when integer(X),"
-			     "float(X), atom(X), constant(X),"
+			     "float(X), atom(X),"
 			     "list(X), number(X), pid(X),"
 			     "port(X), reference(X), tuple(X),"
 			     "binary(X), record(X,a) -> true end)"
@@ -530,7 +528,6 @@ autoimported(Config) when is_list(Config) ->
 	       {self,0},
                %{float,1}, see float_1_function/1
 	       {is_atom,1},
-	       {is_constant,1},
 	       {is_float,1},
 	       {is_integer,1},
 	       {is_list,1},