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f0efc7aa DN |
1 | /* Routines for emitting GIMPLE to a file stream. |
2 | ||
23a5b65a | 3 | Copyright (C) 2011-2014 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" | |
25 | #include "tree.h" | |
60393bbc AM |
26 | #include "predict.h" |
27 | #include "vec.h" | |
28 | #include "hashtab.h" | |
29 | #include "hash-set.h" | |
30 | #include "machmode.h" | |
31 | #include "tm.h" | |
32 | #include "hard-reg-set.h" | |
33 | #include "input.h" | |
34 | #include "function.h" | |
2fb9a547 AM |
35 | #include "basic-block.h" |
36 | #include "tree-ssa-alias.h" | |
37 | #include "internal-fn.h" | |
38 | #include "tree-eh.h" | |
39 | #include "gimple-expr.h" | |
40 | #include "is-a.h" | |
442b4905 | 41 | #include "gimple.h" |
5be5c238 | 42 | #include "gimple-iterator.h" |
442b4905 | 43 | #include "gimple-ssa.h" |
f0efc7aa DN |
44 | #include "data-streamer.h" |
45 | #include "gimple-streamer.h" | |
46 | #include "lto-streamer.h" | |
b9393656 | 47 | #include "tree-streamer.h" |
89ab31c1 | 48 | #include "value-prof.h" |
f0efc7aa DN |
49 | |
50 | /* Output PHI function PHI to the main stream in OB. */ | |
51 | ||
52 | static void | |
53 | output_phi (struct output_block *ob, gimple phi) | |
54 | { | |
55 | unsigned i, len = gimple_phi_num_args (phi); | |
56 | ||
412288f1 DN |
57 | streamer_write_record_start (ob, lto_gimple_code_to_tag (GIMPLE_PHI)); |
58 | streamer_write_uhwi (ob, SSA_NAME_VERSION (PHI_RESULT (phi))); | |
f0efc7aa DN |
59 | |
60 | for (i = 0; i < len; i++) | |
61 | { | |
b9393656 | 62 | stream_write_tree (ob, gimple_phi_arg_def (phi, i), true); |
412288f1 | 63 | streamer_write_uhwi (ob, gimple_phi_arg_edge (phi, i)->src->index); |
7cb7d208 RB |
64 | bitpack_d bp = bitpack_create (ob->main_stream); |
65 | stream_output_location (ob, &bp, gimple_phi_arg_location (phi, i)); | |
66 | streamer_write_bitpack (&bp); | |
f0efc7aa DN |
67 | } |
68 | } | |
69 | ||
70 | ||
71 | /* Emit statement STMT on the main stream of output block OB. */ | |
72 | ||
73 | static void | |
74 | output_gimple_stmt (struct output_block *ob, gimple stmt) | |
75 | { | |
76 | unsigned i; | |
77 | enum gimple_code code; | |
78 | enum LTO_tags tag; | |
79 | struct bitpack_d bp; | |
89ab31c1 | 80 | histogram_value hist; |
f0efc7aa DN |
81 | |
82 | /* Emit identifying tag. */ | |
83 | code = gimple_code (stmt); | |
84 | tag = lto_gimple_code_to_tag (code); | |
412288f1 | 85 | streamer_write_record_start (ob, tag); |
f0efc7aa DN |
86 | |
87 | /* Emit the tuple header. */ | |
88 | bp = bitpack_create (ob->main_stream); | |
89 | bp_pack_var_len_unsigned (&bp, gimple_num_ops (stmt)); | |
90 | bp_pack_value (&bp, gimple_no_warning_p (stmt), 1); | |
91 | if (is_gimple_assign (stmt)) | |
92 | bp_pack_value (&bp, gimple_assign_nontemporal_move_p (stmt), 1); | |
93 | bp_pack_value (&bp, gimple_has_volatile_ops (stmt), 1); | |
89ab31c1 JH |
94 | hist = gimple_histogram_value (cfun, stmt); |
95 | bp_pack_value (&bp, hist != NULL, 1); | |
daa6e488 | 96 | bp_pack_var_len_unsigned (&bp, stmt->subcode); |
f0efc7aa DN |
97 | |
98 | /* Emit location information for the statement. */ | |
7cb7d208 RB |
99 | stream_output_location (ob, &bp, LOCATION_LOCUS (gimple_location (stmt))); |
100 | streamer_write_bitpack (&bp); | |
f0efc7aa DN |
101 | |
102 | /* Emit the lexical block holding STMT. */ | |
b9393656 | 103 | stream_write_tree (ob, gimple_block (stmt), true); |
f0efc7aa DN |
104 | |
105 | /* Emit the operands. */ | |
106 | switch (gimple_code (stmt)) | |
107 | { | |
108 | case GIMPLE_RESX: | |
412288f1 | 109 | streamer_write_hwi (ob, gimple_resx_region (stmt)); |
f0efc7aa DN |
110 | break; |
111 | ||
112 | case GIMPLE_EH_MUST_NOT_THROW: | |
b9393656 | 113 | stream_write_tree (ob, gimple_eh_must_not_throw_fndecl (stmt), true); |
f0efc7aa DN |
114 | break; |
115 | ||
116 | case GIMPLE_EH_DISPATCH: | |
412288f1 | 117 | streamer_write_hwi (ob, gimple_eh_dispatch_region (stmt)); |
f0efc7aa DN |
118 | break; |
119 | ||
120 | case GIMPLE_ASM: | |
412288f1 DN |
121 | streamer_write_uhwi (ob, gimple_asm_ninputs (stmt)); |
122 | streamer_write_uhwi (ob, gimple_asm_noutputs (stmt)); | |
123 | streamer_write_uhwi (ob, gimple_asm_nclobbers (stmt)); | |
124 | streamer_write_uhwi (ob, gimple_asm_nlabels (stmt)); | |
125 | streamer_write_string (ob, ob->main_stream, gimple_asm_string (stmt), | |
126 | true); | |
f0efc7aa DN |
127 | /* Fallthru */ |
128 | ||
129 | case GIMPLE_ASSIGN: | |
130 | case GIMPLE_CALL: | |
131 | case GIMPLE_RETURN: | |
132 | case GIMPLE_SWITCH: | |
133 | case GIMPLE_LABEL: | |
134 | case GIMPLE_COND: | |
135 | case GIMPLE_GOTO: | |
136 | case GIMPLE_DEBUG: | |
137 | for (i = 0; i < gimple_num_ops (stmt); i++) | |
138 | { | |
139 | tree op = gimple_op (stmt, i); | |
976a81ee | 140 | tree *basep = NULL; |
f0efc7aa DN |
141 | /* Wrap all uses of non-automatic variables inside MEM_REFs |
142 | so that we do not have to deal with type mismatches on | |
143 | merged symbols during IL read in. The first operand | |
144 | of GIMPLE_DEBUG must be a decl, not MEM_REF, though. */ | |
145 | if (op && (i || !is_gimple_debug (stmt))) | |
146 | { | |
976a81ee | 147 | basep = &op; |
3fede979 RB |
148 | if (TREE_CODE (*basep) == ADDR_EXPR) |
149 | basep = &TREE_OPERAND (*basep, 0); | |
f0efc7aa DN |
150 | while (handled_component_p (*basep)) |
151 | basep = &TREE_OPERAND (*basep, 0); | |
152 | if (TREE_CODE (*basep) == VAR_DECL | |
153 | && !auto_var_in_fn_p (*basep, current_function_decl) | |
154 | && !DECL_REGISTER (*basep)) | |
155 | { | |
156 | bool volatilep = TREE_THIS_VOLATILE (*basep); | |
3fede979 | 157 | tree ptrtype = build_pointer_type (TREE_TYPE (*basep)); |
f0efc7aa | 158 | *basep = build2 (MEM_REF, TREE_TYPE (*basep), |
3fede979 RB |
159 | build1 (ADDR_EXPR, ptrtype, *basep), |
160 | build_int_cst (ptrtype, 0)); | |
f0efc7aa DN |
161 | TREE_THIS_VOLATILE (*basep) = volatilep; |
162 | } | |
976a81ee RB |
163 | else |
164 | basep = NULL; | |
f0efc7aa | 165 | } |
b9393656 | 166 | stream_write_tree (ob, op, true); |
976a81ee RB |
167 | /* Restore the original base if we wrapped it inside a MEM_REF. */ |
168 | if (basep) | |
169 | *basep = TREE_OPERAND (TREE_OPERAND (*basep, 0), 0); | |
f0efc7aa DN |
170 | } |
171 | if (is_gimple_call (stmt)) | |
172 | { | |
173 | if (gimple_call_internal_p (stmt)) | |
412288f1 DN |
174 | streamer_write_enum (ob->main_stream, internal_fn, |
175 | IFN_LAST, gimple_call_internal_fn (stmt)); | |
f0efc7aa | 176 | else |
b9393656 | 177 | stream_write_tree (ob, gimple_call_fntype (stmt), true); |
f0efc7aa DN |
178 | } |
179 | break; | |
180 | ||
181 | case GIMPLE_NOP: | |
182 | case GIMPLE_PREDICT: | |
183 | break; | |
184 | ||
57ac2606 AH |
185 | case GIMPLE_TRANSACTION: |
186 | gcc_assert (gimple_transaction_body (stmt) == NULL); | |
187 | stream_write_tree (ob, gimple_transaction_label (stmt), true); | |
188 | break; | |
189 | ||
f0efc7aa DN |
190 | default: |
191 | gcc_unreachable (); | |
192 | } | |
89ab31c1 JH |
193 | if (hist) |
194 | stream_out_histogram_value (ob, hist); | |
f0efc7aa DN |
195 | } |
196 | ||
197 | ||
198 | /* Output a basic block BB to the main stream in OB for this FN. */ | |
199 | ||
200 | void | |
201 | output_bb (struct output_block *ob, basic_block bb, struct function *fn) | |
202 | { | |
203 | gimple_stmt_iterator bsi = gsi_start_bb (bb); | |
204 | ||
412288f1 DN |
205 | streamer_write_record_start (ob, |
206 | (!gsi_end_p (bsi)) || phi_nodes (bb) | |
207 | ? LTO_bb1 | |
208 | : LTO_bb0); | |
f0efc7aa | 209 | |
412288f1 | 210 | streamer_write_uhwi (ob, bb->index); |
89ab31c1 | 211 | streamer_write_gcov_count (ob, bb->count); |
412288f1 DN |
212 | streamer_write_hwi (ob, bb->frequency); |
213 | streamer_write_hwi (ob, bb->flags); | |
f0efc7aa DN |
214 | |
215 | if (!gsi_end_p (bsi) || phi_nodes (bb)) | |
216 | { | |
217 | /* Output the statements. The list of statements is terminated | |
218 | with a zero. */ | |
219 | for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi)) | |
220 | { | |
221 | int region; | |
222 | gimple stmt = gsi_stmt (bsi); | |
223 | ||
224 | output_gimple_stmt (ob, stmt); | |
225 | ||
226 | /* Emit the EH region holding STMT. */ | |
227 | region = lookup_stmt_eh_lp_fn (fn, stmt); | |
228 | if (region != 0) | |
229 | { | |
412288f1 DN |
230 | streamer_write_record_start (ob, LTO_eh_region); |
231 | streamer_write_hwi (ob, region); | |
f0efc7aa DN |
232 | } |
233 | else | |
412288f1 | 234 | streamer_write_record_start (ob, LTO_null); |
f0efc7aa DN |
235 | } |
236 | ||
412288f1 | 237 | streamer_write_record_start (ob, LTO_null); |
f0efc7aa DN |
238 | |
239 | for (bsi = gsi_start_phis (bb); !gsi_end_p (bsi); gsi_next (&bsi)) | |
240 | { | |
241 | gimple phi = gsi_stmt (bsi); | |
242 | ||
243 | /* Only emit PHIs for gimple registers. PHI nodes for .MEM | |
244 | will be filled in on reading when the SSA form is | |
245 | updated. */ | |
ea057359 | 246 | if (!virtual_operand_p (gimple_phi_result (phi))) |
f0efc7aa DN |
247 | output_phi (ob, phi); |
248 | } | |
249 | ||
412288f1 | 250 | streamer_write_record_start (ob, LTO_null); |
f0efc7aa DN |
251 | } |
252 | } |