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f0efc7aa DN |
1 | /* Routines for emitting GIMPLE to a file stream. |
2 | ||
8d9254fc | 3 | Copyright (C) 2011-2020 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" |
b4da704c | 34 | #include "gimple-pretty-print.h" |
f0efc7aa DN |
35 | |
36 | /* Output PHI function PHI to the main stream in OB. */ | |
37 | ||
38 | static void | |
538dd0b7 | 39 | output_phi (struct output_block *ob, gphi *phi) |
f0efc7aa DN |
40 | { |
41 | unsigned i, len = gimple_phi_num_args (phi); | |
42 | ||
412288f1 DN |
43 | streamer_write_record_start (ob, lto_gimple_code_to_tag (GIMPLE_PHI)); |
44 | streamer_write_uhwi (ob, SSA_NAME_VERSION (PHI_RESULT (phi))); | |
f0efc7aa DN |
45 | |
46 | for (i = 0; i < len; i++) | |
47 | { | |
b9393656 | 48 | stream_write_tree (ob, gimple_phi_arg_def (phi, i), true); |
412288f1 | 49 | streamer_write_uhwi (ob, gimple_phi_arg_edge (phi, i)->src->index); |
7cb7d208 RB |
50 | bitpack_d bp = bitpack_create (ob->main_stream); |
51 | stream_output_location (ob, &bp, gimple_phi_arg_location (phi, i)); | |
52 | streamer_write_bitpack (&bp); | |
f0efc7aa DN |
53 | } |
54 | } | |
55 | ||
56 | ||
57 | /* Emit statement STMT on the main stream of output block OB. */ | |
58 | ||
59 | static void | |
1fcf52a6 | 60 | output_gimple_stmt (struct output_block *ob, struct function *fn, gimple *stmt) |
f0efc7aa DN |
61 | { |
62 | unsigned i; | |
63 | enum gimple_code code; | |
64 | enum LTO_tags tag; | |
65 | struct bitpack_d bp; | |
89ab31c1 | 66 | histogram_value hist; |
f0efc7aa DN |
67 | |
68 | /* Emit identifying tag. */ | |
69 | code = gimple_code (stmt); | |
70 | tag = lto_gimple_code_to_tag (code); | |
412288f1 | 71 | streamer_write_record_start (ob, tag); |
f0efc7aa DN |
72 | |
73 | /* Emit the tuple header. */ | |
74 | bp = bitpack_create (ob->main_stream); | |
75 | bp_pack_var_len_unsigned (&bp, gimple_num_ops (stmt)); | |
76 | bp_pack_value (&bp, gimple_no_warning_p (stmt), 1); | |
77 | if (is_gimple_assign (stmt)) | |
538dd0b7 DM |
78 | bp_pack_value (&bp, |
79 | gimple_assign_nontemporal_move_p ( | |
80 | as_a <gassign *> (stmt)), | |
81 | 1); | |
f0efc7aa | 82 | bp_pack_value (&bp, gimple_has_volatile_ops (stmt), 1); |
1fcf52a6 | 83 | hist = gimple_histogram_value (fn, stmt); |
89ab31c1 | 84 | bp_pack_value (&bp, hist != NULL, 1); |
daa6e488 | 85 | bp_pack_var_len_unsigned (&bp, stmt->subcode); |
f0efc7aa DN |
86 | |
87 | /* Emit location information for the statement. */ | |
7cb7d208 RB |
88 | stream_output_location (ob, &bp, LOCATION_LOCUS (gimple_location (stmt))); |
89 | streamer_write_bitpack (&bp); | |
f0efc7aa DN |
90 | |
91 | /* Emit the lexical block holding STMT. */ | |
b9393656 | 92 | stream_write_tree (ob, gimple_block (stmt), true); |
f0efc7aa DN |
93 | |
94 | /* Emit the operands. */ | |
95 | switch (gimple_code (stmt)) | |
96 | { | |
97 | case GIMPLE_RESX: | |
538dd0b7 | 98 | streamer_write_hwi (ob, gimple_resx_region (as_a <gresx *> (stmt))); |
f0efc7aa DN |
99 | break; |
100 | ||
101 | case GIMPLE_EH_MUST_NOT_THROW: | |
538dd0b7 DM |
102 | stream_write_tree (ob, |
103 | gimple_eh_must_not_throw_fndecl ( | |
104 | as_a <geh_mnt *> (stmt)), | |
105 | true); | |
f0efc7aa DN |
106 | break; |
107 | ||
108 | case GIMPLE_EH_DISPATCH: | |
538dd0b7 DM |
109 | streamer_write_hwi (ob, |
110 | gimple_eh_dispatch_region ( | |
111 | as_a <geh_dispatch *> (stmt))); | |
f0efc7aa DN |
112 | break; |
113 | ||
114 | case GIMPLE_ASM: | |
538dd0b7 DM |
115 | { |
116 | gasm *asm_stmt = as_a <gasm *> (stmt); | |
117 | streamer_write_uhwi (ob, gimple_asm_ninputs (asm_stmt)); | |
118 | streamer_write_uhwi (ob, gimple_asm_noutputs (asm_stmt)); | |
119 | streamer_write_uhwi (ob, gimple_asm_nclobbers (asm_stmt)); | |
120 | streamer_write_uhwi (ob, gimple_asm_nlabels (asm_stmt)); | |
121 | streamer_write_string (ob, ob->main_stream, | |
122 | gimple_asm_string (asm_stmt), true); | |
123 | } | |
f0efc7aa DN |
124 | /* Fallthru */ |
125 | ||
126 | case GIMPLE_ASSIGN: | |
127 | case GIMPLE_CALL: | |
128 | case GIMPLE_RETURN: | |
129 | case GIMPLE_SWITCH: | |
130 | case GIMPLE_LABEL: | |
131 | case GIMPLE_COND: | |
132 | case GIMPLE_GOTO: | |
133 | case GIMPLE_DEBUG: | |
134 | for (i = 0; i < gimple_num_ops (stmt); i++) | |
135 | { | |
136 | tree op = gimple_op (stmt, i); | |
976a81ee | 137 | tree *basep = NULL; |
f0efc7aa DN |
138 | /* Wrap all uses of non-automatic variables inside MEM_REFs |
139 | so that we do not have to deal with type mismatches on | |
140 | merged symbols during IL read in. The first operand | |
141 | of GIMPLE_DEBUG must be a decl, not MEM_REF, though. */ | |
1fcf52a6 | 142 | if (!flag_wpa && op && (i || !is_gimple_debug (stmt))) |
f0efc7aa | 143 | { |
976a81ee | 144 | basep = &op; |
3fede979 RB |
145 | if (TREE_CODE (*basep) == ADDR_EXPR) |
146 | basep = &TREE_OPERAND (*basep, 0); | |
f0efc7aa DN |
147 | while (handled_component_p (*basep)) |
148 | basep = &TREE_OPERAND (*basep, 0); | |
8813a647 | 149 | if (VAR_P (*basep) |
1fcf52a6 | 150 | && !auto_var_in_fn_p (*basep, fn->decl) |
f0efc7aa DN |
151 | && !DECL_REGISTER (*basep)) |
152 | { | |
153 | bool volatilep = TREE_THIS_VOLATILE (*basep); | |
3fede979 | 154 | tree ptrtype = build_pointer_type (TREE_TYPE (*basep)); |
f0efc7aa | 155 | *basep = build2 (MEM_REF, TREE_TYPE (*basep), |
3fede979 RB |
156 | build1 (ADDR_EXPR, ptrtype, *basep), |
157 | build_int_cst (ptrtype, 0)); | |
f0efc7aa DN |
158 | TREE_THIS_VOLATILE (*basep) = volatilep; |
159 | } | |
976a81ee RB |
160 | else |
161 | basep = NULL; | |
f0efc7aa | 162 | } |
b9393656 | 163 | stream_write_tree (ob, op, true); |
976a81ee RB |
164 | /* Restore the original base if we wrapped it inside a MEM_REF. */ |
165 | if (basep) | |
166 | *basep = TREE_OPERAND (TREE_OPERAND (*basep, 0), 0); | |
f0efc7aa DN |
167 | } |
168 | if (is_gimple_call (stmt)) | |
169 | { | |
170 | if (gimple_call_internal_p (stmt)) | |
412288f1 DN |
171 | streamer_write_enum (ob->main_stream, internal_fn, |
172 | IFN_LAST, gimple_call_internal_fn (stmt)); | |
f0efc7aa | 173 | else |
b9393656 | 174 | stream_write_tree (ob, gimple_call_fntype (stmt), true); |
f0efc7aa DN |
175 | } |
176 | break; | |
177 | ||
178 | case GIMPLE_NOP: | |
179 | case GIMPLE_PREDICT: | |
180 | break; | |
181 | ||
57ac2606 | 182 | case GIMPLE_TRANSACTION: |
538dd0b7 | 183 | { |
7c11b0fe RH |
184 | gtransaction *txn = as_a <gtransaction *> (stmt); |
185 | gcc_assert (gimple_transaction_body (txn) == NULL); | |
186 | stream_write_tree (ob, gimple_transaction_label_norm (txn), true); | |
187 | stream_write_tree (ob, gimple_transaction_label_uninst (txn), true); | |
188 | stream_write_tree (ob, gimple_transaction_label_over (txn), true); | |
538dd0b7 | 189 | } |
57ac2606 AH |
190 | break; |
191 | ||
f0efc7aa DN |
192 | default: |
193 | gcc_unreachable (); | |
194 | } | |
89ab31c1 JH |
195 | if (hist) |
196 | stream_out_histogram_value (ob, hist); | |
f0efc7aa DN |
197 | } |
198 | ||
199 | ||
200 | /* Output a basic block BB to the main stream in OB for this FN. */ | |
201 | ||
202 | void | |
203 | output_bb (struct output_block *ob, basic_block bb, struct function *fn) | |
204 | { | |
205 | gimple_stmt_iterator bsi = gsi_start_bb (bb); | |
206 | ||
412288f1 DN |
207 | streamer_write_record_start (ob, |
208 | (!gsi_end_p (bsi)) || phi_nodes (bb) | |
209 | ? LTO_bb1 | |
210 | : LTO_bb0); | |
f0efc7aa | 211 | |
412288f1 | 212 | streamer_write_uhwi (ob, bb->index); |
3995f3a2 | 213 | bb->count.stream_out (ob); |
412288f1 | 214 | streamer_write_hwi (ob, bb->flags); |
b348c78a | 215 | streamer_write_hwi (ob, bb->discriminator); |
f0efc7aa DN |
216 | |
217 | if (!gsi_end_p (bsi) || phi_nodes (bb)) | |
218 | { | |
219 | /* Output the statements. The list of statements is terminated | |
220 | with a zero. */ | |
221 | for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi)) | |
222 | { | |
223 | int region; | |
355fe088 | 224 | gimple *stmt = gsi_stmt (bsi); |
b4da704c JH |
225 | if (streamer_dump_file) |
226 | { | |
227 | fprintf (streamer_dump_file, " Streaming gimple stmt "); | |
228 | print_gimple_stmt (streamer_dump_file, stmt, 0, TDF_SLIM); | |
229 | } | |
f0efc7aa | 230 | |
1fcf52a6 | 231 | output_gimple_stmt (ob, fn, stmt); |
f0efc7aa DN |
232 | |
233 | /* Emit the EH region holding STMT. */ | |
234 | region = lookup_stmt_eh_lp_fn (fn, stmt); | |
235 | if (region != 0) | |
236 | { | |
412288f1 DN |
237 | streamer_write_record_start (ob, LTO_eh_region); |
238 | streamer_write_hwi (ob, region); | |
f0efc7aa DN |
239 | } |
240 | else | |
412288f1 | 241 | streamer_write_record_start (ob, LTO_null); |
f0efc7aa DN |
242 | } |
243 | ||
412288f1 | 244 | streamer_write_record_start (ob, LTO_null); |
f0efc7aa | 245 | |
538dd0b7 DM |
246 | for (gphi_iterator psi = gsi_start_phis (bb); |
247 | !gsi_end_p (psi); | |
248 | gsi_next (&psi)) | |
f0efc7aa | 249 | { |
538dd0b7 | 250 | gphi *phi = psi.phi (); |
f0efc7aa DN |
251 | |
252 | /* Only emit PHIs for gimple registers. PHI nodes for .MEM | |
253 | will be filled in on reading when the SSA form is | |
254 | updated. */ | |
ea057359 | 255 | if (!virtual_operand_p (gimple_phi_result (phi))) |
f0efc7aa DN |
256 | output_phi (ob, phi); |
257 | } | |
258 | ||
412288f1 | 259 | streamer_write_record_start (ob, LTO_null); |
f0efc7aa DN |
260 | } |
261 | } |