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f0efc7aa DN |
1 | /* Routines for emitting GIMPLE to a file stream. |
2 | ||
818ab71a | 3 | Copyright (C) 2011-2016 Free Software Foundation, Inc. |
f0efc7aa DN |
4 | Contributed by Diego Novillo <dnovillo@google.com> |
5 | ||
6 | This file is part of GCC. | |
7 | ||
8 | GCC is free software; you can redistribute it and/or modify it under | |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 3, or (at your option) any later | |
11 | version. | |
12 | ||
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GCC; see the file COPYING3. If not see | |
20 | <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "config.h" | |
23 | #include "system.h" | |
24 | #include "coretypes.h" | |
c7131fb2 | 25 | #include "backend.h" |
40e23961 | 26 | #include "tree.h" |
c7131fb2 | 27 | #include "gimple.h" |
957060b5 AM |
28 | #include "gimple-ssa.h" |
29 | #include "gimple-streamer.h" | |
2fb9a547 | 30 | #include "tree-eh.h" |
5be5c238 | 31 | #include "gimple-iterator.h" |
c582198b | 32 | #include "cgraph.h" |
89ab31c1 | 33 | #include "value-prof.h" |
f0efc7aa DN |
34 | |
35 | /* Output PHI function PHI to the main stream in OB. */ | |
36 | ||
37 | static void | |
538dd0b7 | 38 | output_phi (struct output_block *ob, gphi *phi) |
f0efc7aa DN |
39 | { |
40 | unsigned i, len = gimple_phi_num_args (phi); | |
41 | ||
412288f1 DN |
42 | streamer_write_record_start (ob, lto_gimple_code_to_tag (GIMPLE_PHI)); |
43 | streamer_write_uhwi (ob, SSA_NAME_VERSION (PHI_RESULT (phi))); | |
f0efc7aa DN |
44 | |
45 | for (i = 0; i < len; i++) | |
46 | { | |
b9393656 | 47 | stream_write_tree (ob, gimple_phi_arg_def (phi, i), true); |
412288f1 | 48 | streamer_write_uhwi (ob, gimple_phi_arg_edge (phi, i)->src->index); |
7cb7d208 RB |
49 | bitpack_d bp = bitpack_create (ob->main_stream); |
50 | stream_output_location (ob, &bp, gimple_phi_arg_location (phi, i)); | |
51 | streamer_write_bitpack (&bp); | |
f0efc7aa DN |
52 | } |
53 | } | |
54 | ||
55 | ||
56 | /* Emit statement STMT on the main stream of output block OB. */ | |
57 | ||
58 | static void | |
355fe088 | 59 | output_gimple_stmt (struct output_block *ob, gimple *stmt) |
f0efc7aa DN |
60 | { |
61 | unsigned i; | |
62 | enum gimple_code code; | |
63 | enum LTO_tags tag; | |
64 | struct bitpack_d bp; | |
89ab31c1 | 65 | histogram_value hist; |
f0efc7aa DN |
66 | |
67 | /* Emit identifying tag. */ | |
68 | code = gimple_code (stmt); | |
69 | tag = lto_gimple_code_to_tag (code); | |
412288f1 | 70 | streamer_write_record_start (ob, tag); |
f0efc7aa DN |
71 | |
72 | /* Emit the tuple header. */ | |
73 | bp = bitpack_create (ob->main_stream); | |
74 | bp_pack_var_len_unsigned (&bp, gimple_num_ops (stmt)); | |
75 | bp_pack_value (&bp, gimple_no_warning_p (stmt), 1); | |
76 | if (is_gimple_assign (stmt)) | |
538dd0b7 DM |
77 | bp_pack_value (&bp, |
78 | gimple_assign_nontemporal_move_p ( | |
79 | as_a <gassign *> (stmt)), | |
80 | 1); | |
f0efc7aa | 81 | bp_pack_value (&bp, gimple_has_volatile_ops (stmt), 1); |
89ab31c1 JH |
82 | hist = gimple_histogram_value (cfun, stmt); |
83 | bp_pack_value (&bp, hist != NULL, 1); | |
daa6e488 | 84 | bp_pack_var_len_unsigned (&bp, stmt->subcode); |
f0efc7aa DN |
85 | |
86 | /* Emit location information for the statement. */ | |
7cb7d208 RB |
87 | stream_output_location (ob, &bp, LOCATION_LOCUS (gimple_location (stmt))); |
88 | streamer_write_bitpack (&bp); | |
f0efc7aa DN |
89 | |
90 | /* Emit the lexical block holding STMT. */ | |
b9393656 | 91 | stream_write_tree (ob, gimple_block (stmt), true); |
f0efc7aa DN |
92 | |
93 | /* Emit the operands. */ | |
94 | switch (gimple_code (stmt)) | |
95 | { | |
96 | case GIMPLE_RESX: | |
538dd0b7 | 97 | streamer_write_hwi (ob, gimple_resx_region (as_a <gresx *> (stmt))); |
f0efc7aa DN |
98 | break; |
99 | ||
100 | case GIMPLE_EH_MUST_NOT_THROW: | |
538dd0b7 DM |
101 | stream_write_tree (ob, |
102 | gimple_eh_must_not_throw_fndecl ( | |
103 | as_a <geh_mnt *> (stmt)), | |
104 | true); | |
f0efc7aa DN |
105 | break; |
106 | ||
107 | case GIMPLE_EH_DISPATCH: | |
538dd0b7 DM |
108 | streamer_write_hwi (ob, |
109 | gimple_eh_dispatch_region ( | |
110 | as_a <geh_dispatch *> (stmt))); | |
f0efc7aa DN |
111 | break; |
112 | ||
113 | case GIMPLE_ASM: | |
538dd0b7 DM |
114 | { |
115 | gasm *asm_stmt = as_a <gasm *> (stmt); | |
116 | streamer_write_uhwi (ob, gimple_asm_ninputs (asm_stmt)); | |
117 | streamer_write_uhwi (ob, gimple_asm_noutputs (asm_stmt)); | |
118 | streamer_write_uhwi (ob, gimple_asm_nclobbers (asm_stmt)); | |
119 | streamer_write_uhwi (ob, gimple_asm_nlabels (asm_stmt)); | |
120 | streamer_write_string (ob, ob->main_stream, | |
121 | gimple_asm_string (asm_stmt), true); | |
122 | } | |
f0efc7aa DN |
123 | /* Fallthru */ |
124 | ||
125 | case GIMPLE_ASSIGN: | |
126 | case GIMPLE_CALL: | |
127 | case GIMPLE_RETURN: | |
128 | case GIMPLE_SWITCH: | |
129 | case GIMPLE_LABEL: | |
130 | case GIMPLE_COND: | |
131 | case GIMPLE_GOTO: | |
132 | case GIMPLE_DEBUG: | |
133 | for (i = 0; i < gimple_num_ops (stmt); i++) | |
134 | { | |
135 | tree op = gimple_op (stmt, i); | |
976a81ee | 136 | tree *basep = NULL; |
f0efc7aa DN |
137 | /* Wrap all uses of non-automatic variables inside MEM_REFs |
138 | so that we do not have to deal with type mismatches on | |
139 | merged symbols during IL read in. The first operand | |
140 | of GIMPLE_DEBUG must be a decl, not MEM_REF, though. */ | |
141 | if (op && (i || !is_gimple_debug (stmt))) | |
142 | { | |
976a81ee | 143 | basep = &op; |
3fede979 RB |
144 | if (TREE_CODE (*basep) == ADDR_EXPR) |
145 | basep = &TREE_OPERAND (*basep, 0); | |
f0efc7aa DN |
146 | while (handled_component_p (*basep)) |
147 | basep = &TREE_OPERAND (*basep, 0); | |
148 | if (TREE_CODE (*basep) == VAR_DECL | |
149 | && !auto_var_in_fn_p (*basep, current_function_decl) | |
150 | && !DECL_REGISTER (*basep)) | |
151 | { | |
152 | bool volatilep = TREE_THIS_VOLATILE (*basep); | |
3fede979 | 153 | tree ptrtype = build_pointer_type (TREE_TYPE (*basep)); |
f0efc7aa | 154 | *basep = build2 (MEM_REF, TREE_TYPE (*basep), |
3fede979 RB |
155 | build1 (ADDR_EXPR, ptrtype, *basep), |
156 | build_int_cst (ptrtype, 0)); | |
f0efc7aa DN |
157 | TREE_THIS_VOLATILE (*basep) = volatilep; |
158 | } | |
976a81ee RB |
159 | else |
160 | basep = NULL; | |
f0efc7aa | 161 | } |
b9393656 | 162 | stream_write_tree (ob, op, true); |
976a81ee RB |
163 | /* Restore the original base if we wrapped it inside a MEM_REF. */ |
164 | if (basep) | |
165 | *basep = TREE_OPERAND (TREE_OPERAND (*basep, 0), 0); | |
f0efc7aa DN |
166 | } |
167 | if (is_gimple_call (stmt)) | |
168 | { | |
169 | if (gimple_call_internal_p (stmt)) | |
412288f1 DN |
170 | streamer_write_enum (ob->main_stream, internal_fn, |
171 | IFN_LAST, gimple_call_internal_fn (stmt)); | |
f0efc7aa | 172 | else |
b9393656 | 173 | stream_write_tree (ob, gimple_call_fntype (stmt), true); |
f0efc7aa DN |
174 | } |
175 | break; | |
176 | ||
177 | case GIMPLE_NOP: | |
178 | case GIMPLE_PREDICT: | |
179 | break; | |
180 | ||
57ac2606 | 181 | case GIMPLE_TRANSACTION: |
538dd0b7 | 182 | { |
7c11b0fe RH |
183 | gtransaction *txn = as_a <gtransaction *> (stmt); |
184 | gcc_assert (gimple_transaction_body (txn) == NULL); | |
185 | stream_write_tree (ob, gimple_transaction_label_norm (txn), true); | |
186 | stream_write_tree (ob, gimple_transaction_label_uninst (txn), true); | |
187 | stream_write_tree (ob, gimple_transaction_label_over (txn), true); | |
538dd0b7 | 188 | } |
57ac2606 AH |
189 | break; |
190 | ||
f0efc7aa DN |
191 | default: |
192 | gcc_unreachable (); | |
193 | } | |
89ab31c1 JH |
194 | if (hist) |
195 | stream_out_histogram_value (ob, hist); | |
f0efc7aa DN |
196 | } |
197 | ||
198 | ||
199 | /* Output a basic block BB to the main stream in OB for this FN. */ | |
200 | ||
201 | void | |
202 | output_bb (struct output_block *ob, basic_block bb, struct function *fn) | |
203 | { | |
204 | gimple_stmt_iterator bsi = gsi_start_bb (bb); | |
205 | ||
412288f1 DN |
206 | streamer_write_record_start (ob, |
207 | (!gsi_end_p (bsi)) || phi_nodes (bb) | |
208 | ? LTO_bb1 | |
209 | : LTO_bb0); | |
f0efc7aa | 210 | |
412288f1 | 211 | streamer_write_uhwi (ob, bb->index); |
89ab31c1 | 212 | streamer_write_gcov_count (ob, bb->count); |
412288f1 DN |
213 | streamer_write_hwi (ob, bb->frequency); |
214 | streamer_write_hwi (ob, bb->flags); | |
f0efc7aa DN |
215 | |
216 | if (!gsi_end_p (bsi) || phi_nodes (bb)) | |
217 | { | |
218 | /* Output the statements. The list of statements is terminated | |
219 | with a zero. */ | |
220 | for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi)) | |
221 | { | |
222 | int region; | |
355fe088 | 223 | gimple *stmt = gsi_stmt (bsi); |
f0efc7aa DN |
224 | |
225 | output_gimple_stmt (ob, stmt); | |
226 | ||
227 | /* Emit the EH region holding STMT. */ | |
228 | region = lookup_stmt_eh_lp_fn (fn, stmt); | |
229 | if (region != 0) | |
230 | { | |
412288f1 DN |
231 | streamer_write_record_start (ob, LTO_eh_region); |
232 | streamer_write_hwi (ob, region); | |
f0efc7aa DN |
233 | } |
234 | else | |
412288f1 | 235 | streamer_write_record_start (ob, LTO_null); |
f0efc7aa DN |
236 | } |
237 | ||
412288f1 | 238 | streamer_write_record_start (ob, LTO_null); |
f0efc7aa | 239 | |
538dd0b7 DM |
240 | for (gphi_iterator psi = gsi_start_phis (bb); |
241 | !gsi_end_p (psi); | |
242 | gsi_next (&psi)) | |
f0efc7aa | 243 | { |
538dd0b7 | 244 | gphi *phi = psi.phi (); |
f0efc7aa DN |
245 | |
246 | /* Only emit PHIs for gimple registers. PHI nodes for .MEM | |
247 | will be filled in on reading when the SSA form is | |
248 | updated. */ | |
ea057359 | 249 | if (!virtual_operand_p (gimple_phi_result (phi))) |
f0efc7aa DN |
250 | output_phi (ob, phi); |
251 | } | |
252 | ||
412288f1 | 253 | streamer_write_record_start (ob, LTO_null); |
f0efc7aa DN |
254 | } |
255 | } |