1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
%% -*- erlang-indent-level: 2 -*-
%%======================================================================
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2001-2014. 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(hipe_icode_cfg).
-export([bb/2, bb_add/3,
cfg_to_linear/1,
is_closure/1,
closure_arity/1,
linear_to_cfg/1,
labels/1, start_label/1,
pp/1, pp/2,
params/1, params_update/2,
pred/2,
redirect/4,
remove_trivial_bbs/1, remove_unreachable_code/1,
succ/2,
visit/2, is_visited/2, none_visited/0
]).
-export([postorder/1, reverse_postorder/1]).
-define(ICODE_CFG, true). % needed by cfg.inc
%%-define(DO_ASSERT, true).
-include("../main/hipe.hrl").
-include("hipe_icode.hrl").
-include("../flow/hipe_bb.hrl").
-include("../flow/cfg.hrl").
-include("../flow/cfg.inc").
%%----------------------------------------------------------------------
%% Prototypes for exported functions which are Icode specific
%%----------------------------------------------------------------------
-spec labels(cfg()) -> [icode_lbl()].
-spec postorder(cfg()) -> [icode_lbl()].
-spec reverse_postorder(cfg()) -> [icode_lbl()].
-spec is_visited(icode_lbl(), gb_sets:set()) -> boolean().
-spec visit(icode_lbl(), gb_sets:set()) -> gb_sets:set().
-spec bb(cfg(), icode_lbl()) -> 'not_found' | bb().
-spec bb_add(cfg(), icode_lbl(), bb()) -> cfg().
-spec pred(cfg(), icode_lbl()) -> [icode_lbl()].
-spec succ(cfg(), icode_lbl()) -> [icode_lbl()].
-spec redirect(cfg(), icode_lbl(), icode_lbl(), icode_lbl()) -> cfg().
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Interface to Icode
%%
-spec linear_to_cfg(#icode{}) -> cfg().
linear_to_cfg(LinearIcode) ->
%% hipe_icode_pp:pp(Icode),
Code = hipe_icode:icode_code(LinearIcode),
IsClosure = hipe_icode:icode_is_closure(LinearIcode),
StartLabel = hipe_icode:label_name(hd(Code)),
CFG0 = mk_empty_cfg(hipe_icode:icode_fun(LinearIcode),
StartLabel,
hipe_icode:icode_data(LinearIcode),
IsClosure,
hipe_icode:icode_is_leaf(LinearIcode),
hipe_icode:icode_params(LinearIcode)),
CFG1 = info_update(CFG0, hipe_icode:icode_info(LinearIcode)),
CFG2 = case IsClosure of
true ->
closure_arity_update(CFG1,
hipe_icode:icode_closure_arity(LinearIcode));
false ->
CFG1
end,
?opt_start_timer("Get BBs icode"),
FullCFG = take_bbs(Code, CFG2),
?opt_stop_timer("Get BBs icode"),
FullCFG.
%% remove_blocks(CFG, []) ->
%% CFG;
%% remove_blocks(CFG, [Lbl|Lbls]) ->
%% remove_blocks(bb_remove(CFG, Lbl), Lbls).
-spec is_label(icode_instr()) -> boolean().
is_label(Instr) ->
hipe_icode:is_label(Instr).
label_name(Instr) ->
hipe_icode:label_name(Instr).
mk_label(Name) ->
hipe_icode:mk_label(Name).
mk_goto(Name) ->
hipe_icode:mk_goto(Name).
branch_successors(Instr) ->
hipe_icode:successors(Instr).
fails_to(Instr) ->
hipe_icode:fails_to(Instr).
%% True if instr has no effect.
-spec is_comment(icode_instr()) -> boolean().
is_comment(Instr) ->
hipe_icode:is_comment(Instr).
%% True if instr is just a jump (no side-effects).
-spec is_goto(icode_instr()) -> boolean().
is_goto(Instr) ->
hipe_icode:is_goto(Instr).
-spec is_branch(icode_instr()) -> boolean().
is_branch(Instr) ->
hipe_icode:is_branch(Instr).
-spec is_pure_branch(icode_instr()) -> boolean().
is_pure_branch(Instr) ->
case Instr of
#icode_if{} -> true;
#icode_goto{} -> true;
#icode_switch_val{} -> true;
#icode_switch_tuple_arity{} -> true;
#icode_type{} -> true;
%% false cases below -- XXX: are they correct?
#icode_label{} -> false;
#icode_move{} -> false;
#icode_phi{} -> false;
#icode_call{} -> false;
#icode_enter{} -> false;
#icode_return{} -> false;
#icode_begin_try{} -> false;
#icode_end_try{} -> false;
#icode_begin_handler{} -> false;
#icode_fail{} -> false;
#icode_comment{} -> false
end.
-spec is_phi(icode_instr()) -> boolean().
is_phi(I) ->
hipe_icode:is_phi(I).
phi_remove_pred(I, Pred) ->
hipe_icode:phi_remove_pred(I, Pred).
%% phi_redirect_pred(I, OldPred, NewPred) ->
%% hipe_icode:phi_redirect_pred(I, OldPred, NewPred).
redirect_jmp(Jmp, ToOld, ToNew) ->
hipe_icode:redirect_jmp(Jmp, ToOld, ToNew).
redirect_ops(_, CFG, _) -> %% We do not refer to labels in Icode ops.
CFG.
%%----------------------------------------------------------------------------
-spec pp(cfg()) -> 'ok'.
pp(CFG) ->
hipe_icode_pp:pp(cfg_to_linear(CFG)).
-spec pp(io:device(), cfg()) -> 'ok'.
pp(Dev, CFG) ->
hipe_icode_pp:pp(Dev, cfg_to_linear(CFG)).
%%----------------------------------------------------------------------------
-spec cfg_to_linear(cfg()) -> #icode{}.
cfg_to_linear(CFG) ->
Code = linearize_cfg(CFG),
IsClosure = is_closure(CFG),
Icode = hipe_icode:mk_icode(function(CFG),
params(CFG),
IsClosure,
is_leaf(CFG),
Code,
data(CFG),
hipe_gensym:var_range(icode),
hipe_gensym:label_range(icode)),
Icode1 = hipe_icode:icode_info_update(Icode, info(CFG)),
case IsClosure of
true -> hipe_icode:icode_closure_arity_update(Icode1, closure_arity(CFG));
false -> Icode1
end.
|
