Merge branch 'ks/hipe-R15B02-fixes/OTP-10230' into maint

* ks/hipe-R15B02-fixes/OTP-10230:
  Changes in comments and minor code cleanups
  Comment out unused cases and some csmetic cleanups.
  Fix a typo and strengthen some type declarations
  Remove unused imports
  Add a missing tag in a type declaration

3 files changed, 23 insertions, 26 deletions

diff --git a/lib/hipe/icode/hipe_beam_to_icode.erl b/lib/hipe/icode/hipe_beam_to_icode.erl
index a44171b2f5..ecf1c77abc 100644
--- a/lib/hipe/icode/hipe_beam_to_icode.erl
+++ b/lib/hipe/icode/hipe_beam_to_icode.erl
@@ -72,12 +72,11 @@
 	end).
 
 %%-----------------------------------------------------------------------
-%% Exported types
+%% Types
 %%-----------------------------------------------------------------------
 
 -type hipe_beam_to_icode_ret() :: [{mfa(),#icode{}}].
 
-
 %%-----------------------------------------------------------------------
 %% Internal data structures
 %%-----------------------------------------------------------------------
@@ -315,19 +314,19 @@ trans_fun([{call_ext_last,_N,{extfunc,M,F,A},_}|Instructions], Env) ->
 %%--- bif0 ---
 trans_fun([{bif,BifName,nofail,[],Reg}|Instructions], Env) ->
   BifInst = trans_bif0(BifName,Reg),
-  [hipe_icode:mk_comment({bif0,BifName}),BifInst|trans_fun(Instructions,Env)];
+  [BifInst|trans_fun(Instructions,Env)];
 %%--- bif1 ---
 trans_fun([{bif,BifName,{f,Lbl},[_] = Args,Reg}|Instructions], Env) ->
   {BifInsts,Env1} = trans_bif(1,BifName,Lbl,Args,Reg,Env),
-  [hipe_icode:mk_comment({bif1,BifName})|BifInsts] ++ trans_fun(Instructions,Env1);
+  BifInsts ++ trans_fun(Instructions,Env1);
 %%--- bif2 ---
 trans_fun([{bif,BifName,{f,Lbl},[_,_] = Args,Reg}|Instructions], Env) ->
   {BifInsts,Env1} = trans_bif(2,BifName,Lbl,Args,Reg,Env),
-  [hipe_icode:mk_comment({bif2,BifName})|BifInsts] ++ trans_fun(Instructions,Env1);
+  BifInsts ++ trans_fun(Instructions,Env1);
 %%--- bif3 ---
 trans_fun([{bif,BifName,{f,Lbl},[_,_,_] = Args,Reg}|Instructions], Env) ->
   {BifInsts,Env1} = trans_bif(3,BifName,Lbl,Args,Reg,Env),
-  [hipe_icode:mk_comment({bif3,BifName})|BifInsts] ++ trans_fun(Instructions,Env1);
+  BifInsts ++ trans_fun(Instructions,Env1);
 %%--- allocate
 trans_fun([{allocate,StackSlots,_}|Instructions], Env) ->
   trans_allocate(StackSlots) ++ trans_fun(Instructions,Env);
@@ -816,7 +815,7 @@ trans_fun([{test,bs_test_tail2,{f,Lbl},[Ms,Numbits]}| Instructions], Env) ->
   trans_op_call({hipe_bs_primop,{bs_test_tail,Numbits}}, 
 		Lbl, [MsVar], [], Env, Instructions);
 %%--------------------------------------------------------------------
-%% New bit syntax instructions added in February 2004 (R10B).
+%% bit syntax instructions added in February 2004 (R10B).
 %%--------------------------------------------------------------------
 trans_fun([{bs_init2,{f,Lbl},Size,_Words,_LiveRegs,{field_flags,Flags0},X}|
 	   Instructions], Env) ->
@@ -1031,7 +1030,7 @@ trans_fun([{arithfbif,fnegate,Lab,[SrcR],DestR}|Instructions], Env) ->
       trans_fun([{arithbif,'-',Lab,[{float,0.0},SrcR],DestR}|Instructions], Env)
   end;
 %%--------------------------------------------------------------------
-%% New apply instructions added in April 2004 (R10B).
+%% apply instructions added in April 2004 (R10B).
 %%--------------------------------------------------------------------
 trans_fun([{apply,Arity}|Instructions], Env) ->
   BeamArgs = extract_fun_args(Arity+2), %% +2 is for M and F
@@ -1047,21 +1046,21 @@ trans_fun([{apply_last,Arity,_N}|Instructions], Env) -> % N is StackAdjustment?
    hipe_icode:mk_enter_primop(#apply_N{arity=Arity}, [M,F|Args])
    | trans_fun(Instructions,Env)];
 %%--------------------------------------------------------------------
-%% New test instruction added in April 2004 (R10B).
+%% test for boolean added in April 2004 (R10B).
 %%--------------------------------------------------------------------
 %%--- is_boolean ---
 trans_fun([{test,is_boolean,{f,Lbl},[Arg]}|Instructions], Env) ->
   {Code,Env1} = trans_type_test(boolean,Lbl,Arg,Env),
   [Code | trans_fun(Instructions,Env1)];
 %%--------------------------------------------------------------------
-%% New test instruction added in June 2005 for R11
+%% test for function with specific arity added in June 2005 (R11).
 %%--------------------------------------------------------------------
 %%--- is_function2 ---
 trans_fun([{test,is_function2,{f,Lbl},[Arg,Arity]}|Instructions], Env) ->
   {Code,Env1} = trans_type_test2(function2,Lbl,Arg,Arity,Env),
   [Code | trans_fun(Instructions,Env1)];
 %%--------------------------------------------------------------------
-%% New garbage-collecting BIFs added in January 2006 for R11B.
+%% garbage collecting BIFs added in January 2006 (R11B).
 %%--------------------------------------------------------------------
 trans_fun([{gc_bif,'-',Fail,_Live,[SrcR],DstR}|Instructions], Env) ->
   %% Unary minus. Change this to binary minus.
@@ -1079,21 +1078,21 @@ trans_fun([{gc_bif,Name,Fail,_Live,SrcRs,DstR}|Instructions], Env) ->
       trans_fun([{bif,Name,Fail,SrcRs,DstR}|Instructions], Env)
   end;
 %%--------------------------------------------------------------------
-%% New test instruction added in July 2007 for R12.
+%% test for bitstream added in July 2007 (R12).
 %%--------------------------------------------------------------------
 %%--- is_bitstr ---
 trans_fun([{test,is_bitstr,{f,Lbl},[Arg]}|Instructions], Env) ->
   {Code,Env1} = trans_type_test(bitstr, Lbl, Arg, Env),
   [Code | trans_fun(Instructions, Env1)];
 %%--------------------------------------------------------------------
-%% New stack triming instruction added in October 2007 for R12.
+%% stack triming instruction added in October 2007 (R12).
 %%--------------------------------------------------------------------
 trans_fun([{trim,N,NY}|Instructions], Env) ->
   %% trim away N registers leaving NY registers
   Moves = trans_trim(N, NY),
   Moves ++ trans_fun(Instructions, Env);
 %%--------------------------------------------------------------------
-%% New line/1 instruction in R15.
+%% line instruction added in Fall 2012 (R15).
 %%--------------------------------------------------------------------
 trans_fun([{line,_}|Instructions], Env) ->
   trans_fun(Instructions,Env);
@@ -1297,7 +1296,7 @@ trans_bin([{bs_put_integer,{f,Lbl},Size,Unit,{field_flags,Flags0},Source}|
   SrcInstrs ++ trans_bin_call({hipe_bs_primop, Name}, 
 			     Lbl, [Src|Args], [Offset], Base, Offset, Env2, Instructions);
 %%----------------------------------------------------------------
-%% New binary construction instructions added in R12B-5 (Fall 2008).
+%% binary construction instructions added in Fall 2008 (R12B-5).
 %%----------------------------------------------------------------
 trans_bin([{bs_put_utf8,{f,Lbl},_FF,A3}|Instructions], Base, Offset, Env) ->
   Src = trans_arg(A3),
@@ -1348,7 +1347,7 @@ trans_bs_get_or_skip_utf32(Lbl, Ms, Flags0, X, Instructions, Env) ->
 		      Lbl, [Dst,MsVar], [MsVar], Env1, Instructions).
 
 %%-----------------------------------------------------------------------
-%% trans_arith(Op, SrcVars, Des, Lab, Env) -> { Icode, NewEnv }
+%% trans_arith(Op, SrcVars, Des, Lab, Env) -> {Icode, NewEnv}
 %%     A failure label of type {f,0} means in a body.
 %%     A failure label of type {f,L} where L>0 means in a guard.
 %%        Within a guard a failure should branch to the next guard and
@@ -1454,7 +1453,7 @@ clone_dst(Dest) ->
 
 
 %%-----------------------------------------------------------------------
-%% trans_type_test(Test, Lbl, Arg, Env) -> { Icode, NewEnv }
+%% trans_type_test(Test, Lbl, Arg, Env) -> {Icode, NewEnv}
 %%     Handles all unary type tests like is_integer etc. 
 %%-----------------------------------------------------------------------
 
@@ -1466,7 +1465,7 @@ trans_type_test(Test, Lbl, Arg, Env) ->
   {[Move,I,True],Env1}.
 
 %%
-%% This handles binary type tests. Currently, the only such is the new
+%% This handles binary type tests. Currently, the only such is the
 %% is_function/2 BIF.
 %%
 trans_type_test2(function2, Lbl, Arg, Arity, Env) ->
@@ -1479,7 +1478,7 @@ trans_type_test2(function2, Lbl, Arg, Arity, Env) ->
 
 %%-----------------------------------------------------------------------
 %% trans_puts(Code, Environment) -> 
-%%            { Movs, Code, Vars, NewEnv }
+%%            {Movs, Code, Vars, NewEnv}
 %%-----------------------------------------------------------------------
 
 trans_puts(Code, Env) ->
diff --git a/lib/hipe/icode/hipe_icode.hrl b/lib/hipe/icode/hipe_icode.hrl
index 65deaf6d7c..3b21276209 100644
--- a/lib/hipe/icode/hipe_icode.hrl
+++ b/lib/hipe/icode/hipe_icode.hrl
@@ -64,9 +64,9 @@
 -type icode_if_op()  :: '>' | '<' | '>=' | '=<' | '=:=' | '=/=' | '==' | '/='
                       | 'fixnum_eq' | 'fixnum_neq' | 'fixnum_lt'
                       | 'fixnum_le' | 'fixnum_ge' | 'fixnum_gt' 
-                      | 'suspend_msg_timeout'.
+                      | 'op_exact_eqeq_2' | 'suspend_msg_timeout'.
 
--type icode_type_test()	:: 'atom' | 'bignum' | 'binary' | 'bitrst' | 'boolean'
+-type icode_type_test()	:: 'atom' | 'bignum' | 'binary' | 'bitstr' | 'boolean'
                          | 'cons' | 'constant' | 'fixnum' | 'float'
                          | 'function' | 'function2' | 'integer' | 'list' | 'nil'
                          | 'number' | 'pid' | 'port' | 'reference' | 'tuple'
@@ -88,7 +88,7 @@
 -type icode_call_type()   :: 'local' | 'primop' | 'remote'.
 -type icode_exit_class()  :: 'error' | 'exit' | 'rethrow' | 'throw'.
 
--type icode_comment_text() :: atom() | string() | {atom(), term()}.
+-type icode_comment_text() :: atom() | string().
 
 -type icode_info() :: [{'arg_types', [erl_types:erl_type()]}].
 
diff --git a/lib/hipe/icode/hipe_icode_type.erl b/lib/hipe/icode/hipe_icode_type.erl
index f98d859822..046949d2f2 100644
--- a/lib/hipe/icode/hipe_icode_type.erl
+++ b/lib/hipe/icode/hipe_icode_type.erl
@@ -79,13 +79,13 @@
 -import(erl_types, [number_min/1, number_max/1,
 		    t_any/0, t_atom/1, t_atom/0, t_atom_vals/1,
 		    t_binary/0, t_bitstr/0, t_bitstr_base/1, t_bitstr_unit/1, 
-		    t_boolean/0, t_cons/0, t_constant/0,
+		    t_boolean/0, t_cons/0,
 		    t_float/0, t_from_term/1, t_from_range/2,
 		    t_fun/0, t_fun/1, t_fun/2, t_fun_args/1, t_fun_arity/1, 
 		    t_inf/2, t_inf_lists/2, t_integer/0,
 		    t_integer/1, t_is_atom/1, t_is_any/1,
 		    t_is_binary/1, t_is_bitstr/1, t_is_bitwidth/1, t_is_boolean/1,
-		    t_is_fixnum/1, t_is_cons/1, t_is_constant/1,
+		    t_is_fixnum/1, t_is_cons/1,
 		    t_is_maybe_improper_list/1, t_is_equal/2, t_is_float/1,
 		    t_is_fun/1, t_is_integer/1, t_is_non_neg_integer/1, 
 		    t_is_number/1, t_is_matchstate/1,
@@ -587,7 +587,6 @@ do_type(I, Info, Var) ->
   TrueLab = hipe_icode:type_true_label(I),
   FalseLab = hipe_icode:type_false_label(I),
   None = t_none(),
-  
   case lookup(Var, Info) of
     None ->
       [{TrueLab, Info}, {FalseLab, Info}];
@@ -1699,7 +1698,6 @@ lookup_list0([H|T], Info, Acc) ->
 lookup_list0([], _, Acc) ->
   lists:reverse(Acc).
 
-
 %% safe_lookup treats anything that is neither in the map nor a
 %% constant as t_any(). Use this during transformations.