Line data Source code
1 : /* Routines for emitting GIMPLE to a file stream.
2 :
3 : Copyright (C) 2011-2026 Free Software Foundation, Inc.
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"
25 : #include "backend.h"
26 : #include "tree.h"
27 : #include "gimple.h"
28 : #include "gimple-ssa.h"
29 : #include "gimple-streamer.h"
30 : #include "tree-eh.h"
31 : #include "gimple-iterator.h"
32 : #include "cgraph.h"
33 : #include "value-prof.h"
34 : #include "gimple-pretty-print.h"
35 :
36 : /* Output PHI function PHI to the main stream in OB. */
37 :
38 : static void
39 91189 : output_phi (struct output_block *ob, gphi *phi)
40 : {
41 91189 : unsigned i, len = gimple_phi_num_args (phi);
42 :
43 91189 : streamer_write_record_start (ob, lto_gimple_code_to_tag (GIMPLE_PHI));
44 91189 : streamer_write_uhwi (ob, SSA_NAME_VERSION (PHI_RESULT (phi)));
45 :
46 331441 : for (i = 0; i < len; i++)
47 : {
48 240252 : stream_write_tree (ob, gimple_phi_arg_def (phi, i), true);
49 240252 : streamer_write_uhwi (ob, gimple_phi_arg_edge (phi, i)->src->index);
50 240252 : bitpack_d bp = bitpack_create (ob->main_stream);
51 240252 : location_t loc = gimple_phi_arg_location (phi, i);
52 240252 : stream_output_location_and_block (ob, &bp, loc);
53 : }
54 91189 : }
55 :
56 :
57 : /* Emit statement STMT on the main stream of output block OB. */
58 :
59 : static void
60 1687061 : output_gimple_stmt (struct output_block *ob, struct function *fn, gimple *stmt)
61 : {
62 1687061 : unsigned i;
63 1687061 : enum gimple_code code;
64 1687061 : enum LTO_tags tag;
65 1687061 : struct bitpack_d bp;
66 1687061 : histogram_value hist;
67 :
68 : /* Emit identifying tag. */
69 1687061 : code = gimple_code (stmt);
70 1687061 : tag = lto_gimple_code_to_tag (code);
71 1687061 : streamer_write_record_start (ob, tag);
72 :
73 : /* Emit the tuple header. */
74 1687061 : bp = bitpack_create (ob->main_stream);
75 1687061 : bp_pack_var_len_unsigned (&bp, gimple_num_ops (stmt));
76 1687061 : bp_pack_value (&bp, gimple_no_warning_p (stmt), 1);
77 1687061 : if (is_gimple_assign (stmt))
78 1554386 : bp_pack_value (&bp,
79 777193 : gimple_assign_nontemporal_move_p (
80 777193 : as_a <gassign *> (stmt)),
81 : 1);
82 3050293 : bp_pack_value (&bp, gimple_has_volatile_ops (stmt), 1);
83 1687061 : hist = gimple_histogram_value (fn, stmt);
84 1687061 : bp_pack_value (&bp, hist != NULL, 1);
85 1687061 : bp_pack_var_len_unsigned (&bp, stmt->subcode);
86 :
87 : /* Emit location information for the statement, including gimple_block. */
88 1687061 : stream_output_location_and_block (ob, &bp, gimple_location (stmt));
89 :
90 : /* Emit the operands. */
91 1687061 : switch (gimple_code (stmt))
92 : {
93 2933 : case GIMPLE_RESX:
94 2933 : streamer_write_hwi (ob, gimple_resx_region (as_a <gresx *> (stmt)));
95 2933 : break;
96 :
97 0 : case GIMPLE_EH_MUST_NOT_THROW:
98 0 : stream_write_tree (ob,
99 : gimple_eh_must_not_throw_fndecl (
100 : as_a <geh_mnt *> (stmt)),
101 : true);
102 0 : break;
103 :
104 301 : case GIMPLE_EH_DISPATCH:
105 602 : streamer_write_hwi (ob,
106 301 : gimple_eh_dispatch_region (
107 301 : as_a <geh_dispatch *> (stmt)));
108 301 : break;
109 :
110 6231 : case GIMPLE_ASM:
111 6231 : {
112 6231 : gasm *asm_stmt = as_a <gasm *> (stmt);
113 6231 : streamer_write_uhwi (ob, gimple_asm_ninputs (asm_stmt));
114 6231 : streamer_write_uhwi (ob, gimple_asm_noutputs (asm_stmt));
115 6231 : streamer_write_uhwi (ob, gimple_asm_nclobbers (asm_stmt));
116 6231 : streamer_write_uhwi (ob, gimple_asm_nlabels (asm_stmt));
117 6231 : streamer_write_string (ob, ob->main_stream,
118 : gimple_asm_string (asm_stmt), true);
119 : }
120 : /* Fallthru */
121 :
122 : case GIMPLE_ASSIGN:
123 : case GIMPLE_CALL:
124 : case GIMPLE_RETURN:
125 : case GIMPLE_SWITCH:
126 : case GIMPLE_LABEL:
127 : case GIMPLE_COND:
128 : case GIMPLE_GOTO:
129 : case GIMPLE_DEBUG:
130 6815748 : for (i = 0; i < gimple_num_ops (stmt); i++)
131 : {
132 5185155 : tree op = gimple_op (stmt, i);
133 5185155 : tree *basep = NULL;
134 : /* Wrap all uses of non-automatic variables inside MEM_REFs
135 : so that we do not have to deal with type mismatches on
136 : merged symbols during IL read in. The first operand
137 : of GIMPLE_DEBUG must be a decl, not MEM_REF, though. */
138 5185155 : if (!flag_wpa && op && (i || !is_gimple_debug (stmt)))
139 : {
140 3691521 : basep = &op;
141 3691521 : if (TREE_CODE (*basep) == ADDR_EXPR)
142 609209 : basep = &TREE_OPERAND (*basep, 0);
143 3877891 : while (handled_component_p (*basep))
144 186370 : basep = &TREE_OPERAND (*basep, 0);
145 3691521 : if (VAR_P (*basep)
146 371203 : && !auto_var_in_fn_p (*basep, fn->decl)
147 3945995 : && !DECL_REGISTER (*basep))
148 : {
149 254456 : bool volatilep = TREE_THIS_VOLATILE (*basep);
150 254456 : tree ptrtype = build_pointer_type (TREE_TYPE (*basep));
151 254456 : *basep = build2 (MEM_REF, TREE_TYPE (*basep),
152 : build1 (ADDR_EXPR, ptrtype, *basep),
153 : build_int_cst (ptrtype, 0));
154 254456 : TREE_THIS_VOLATILE (*basep) = volatilep;
155 : }
156 : else
157 : basep = NULL;
158 : }
159 5185155 : stream_write_tree (ob, op, true);
160 : /* Restore the original base if we wrapped it inside a MEM_REF. */
161 5185155 : if (basep)
162 254456 : *basep = TREE_OPERAND (TREE_OPERAND (*basep, 0), 0);
163 : }
164 1630593 : if (is_gimple_call (stmt))
165 : {
166 420729 : if (gimple_call_internal_p (stmt))
167 36169 : streamer_write_enum (ob->main_stream, internal_fn,
168 : IFN_LAST, gimple_call_internal_fn (stmt));
169 : else
170 384560 : stream_write_tree (ob, gimple_call_fntype (stmt), true);
171 : }
172 : break;
173 :
174 : case GIMPLE_NOP:
175 : case GIMPLE_PREDICT:
176 : break;
177 :
178 1 : case GIMPLE_TRANSACTION:
179 1 : {
180 1 : gtransaction *txn = as_a <gtransaction *> (stmt);
181 1 : gcc_assert (gimple_transaction_body (txn) == NULL);
182 1 : stream_write_tree (ob, gimple_transaction_label_norm (txn), true);
183 1 : stream_write_tree (ob, gimple_transaction_label_uninst (txn), true);
184 1 : stream_write_tree (ob, gimple_transaction_label_over (txn), true);
185 : }
186 1 : break;
187 :
188 0 : default:
189 0 : gcc_unreachable ();
190 : }
191 1687061 : if (hist)
192 1 : stream_out_histogram_value (ob, hist);
193 1687061 : }
194 :
195 :
196 : /* Output a basic block BB to the main stream in OB for this FN. */
197 :
198 : void
199 912188 : output_bb (struct output_block *ob, basic_block bb, struct function *fn)
200 : {
201 912188 : gimple_stmt_iterator bsi = gsi_start_bb (bb);
202 :
203 1824376 : streamer_write_record_start (ob,
204 912188 : (!gsi_end_p (bsi)) || phi_nodes (bb)
205 : ? LTO_bb1
206 : : LTO_bb0);
207 :
208 912188 : streamer_write_uhwi (ob, bb->index);
209 912188 : bb->count.stream_out (ob);
210 912188 : streamer_write_hwi (ob, bb->flags);
211 :
212 912188 : if (!gsi_end_p (bsi) || phi_nodes (bb))
213 : {
214 : /* Output the statements. The list of statements is terminated
215 : with a zero. */
216 2987561 : for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi))
217 : {
218 1687061 : int region;
219 1687061 : gimple *stmt = gsi_stmt (bsi);
220 1687061 : if (streamer_dump_file)
221 : {
222 92 : fprintf (streamer_dump_file, " Streaming gimple stmt ");
223 92 : print_gimple_stmt (streamer_dump_file, stmt, 0, TDF_SLIM);
224 : }
225 :
226 1687061 : output_gimple_stmt (ob, fn, stmt);
227 :
228 : /* Emit the EH region holding STMT. */
229 1687061 : region = lookup_stmt_eh_lp_fn (fn, stmt);
230 1687061 : if (region != 0)
231 : {
232 6179 : streamer_write_record_start (ob, LTO_eh_region);
233 6179 : streamer_write_hwi (ob, region);
234 : }
235 : else
236 1680882 : streamer_write_record_start (ob, LTO_null);
237 : }
238 :
239 650250 : streamer_write_record_start (ob, LTO_null);
240 :
241 650250 : for (gphi_iterator psi = gsi_start_phis (bb);
242 807703 : !gsi_end_p (psi);
243 157453 : gsi_next (&psi))
244 : {
245 157453 : gphi *phi = psi.phi ();
246 :
247 : /* Only emit PHIs for gimple registers. PHI nodes for .MEM
248 : will be filled in on reading when the SSA form is
249 : updated. */
250 314906 : if (!virtual_operand_p (gimple_phi_result (phi)))
251 91189 : output_phi (ob, phi);
252 : }
253 :
254 650250 : streamer_write_record_start (ob, LTO_null);
255 : }
256 912188 : }
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