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f0efc7aa DN |
1 | /* Routines for emitting GIMPLE to a file stream. |
2 | ||
d1e082c2 | 3 | Copyright (C) 2011-2013 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" | |
442b4905 AM |
26 | #include "gimple.h" |
27 | #include "gimple-ssa.h" | |
f0efc7aa DN |
28 | #include "data-streamer.h" |
29 | #include "gimple-streamer.h" | |
30 | #include "lto-streamer.h" | |
b9393656 | 31 | #include "tree-streamer.h" |
89ab31c1 | 32 | #include "value-prof.h" |
f0efc7aa DN |
33 | |
34 | /* Output PHI function PHI to the main stream in OB. */ | |
35 | ||
36 | static void | |
37 | output_phi (struct output_block *ob, gimple phi) | |
38 | { | |
39 | unsigned i, len = gimple_phi_num_args (phi); | |
40 | ||
412288f1 DN |
41 | streamer_write_record_start (ob, lto_gimple_code_to_tag (GIMPLE_PHI)); |
42 | streamer_write_uhwi (ob, SSA_NAME_VERSION (PHI_RESULT (phi))); | |
f0efc7aa DN |
43 | |
44 | for (i = 0; i < len; i++) | |
45 | { | |
b9393656 | 46 | stream_write_tree (ob, gimple_phi_arg_def (phi, i), true); |
412288f1 | 47 | streamer_write_uhwi (ob, gimple_phi_arg_edge (phi, i)->src->index); |
7cb7d208 RB |
48 | bitpack_d bp = bitpack_create (ob->main_stream); |
49 | stream_output_location (ob, &bp, gimple_phi_arg_location (phi, i)); | |
50 | streamer_write_bitpack (&bp); | |
f0efc7aa DN |
51 | } |
52 | } | |
53 | ||
54 | ||
55 | /* Emit statement STMT on the main stream of output block OB. */ | |
56 | ||
57 | static void | |
58 | output_gimple_stmt (struct output_block *ob, gimple stmt) | |
59 | { | |
60 | unsigned i; | |
61 | enum gimple_code code; | |
62 | enum LTO_tags tag; | |
63 | struct bitpack_d bp; | |
89ab31c1 | 64 | histogram_value hist; |
f0efc7aa DN |
65 | |
66 | /* Emit identifying tag. */ | |
67 | code = gimple_code (stmt); | |
68 | tag = lto_gimple_code_to_tag (code); | |
412288f1 | 69 | streamer_write_record_start (ob, tag); |
f0efc7aa DN |
70 | |
71 | /* Emit the tuple header. */ | |
72 | bp = bitpack_create (ob->main_stream); | |
73 | bp_pack_var_len_unsigned (&bp, gimple_num_ops (stmt)); | |
74 | bp_pack_value (&bp, gimple_no_warning_p (stmt), 1); | |
75 | if (is_gimple_assign (stmt)) | |
76 | bp_pack_value (&bp, gimple_assign_nontemporal_move_p (stmt), 1); | |
77 | bp_pack_value (&bp, gimple_has_volatile_ops (stmt), 1); | |
89ab31c1 JH |
78 | hist = gimple_histogram_value (cfun, stmt); |
79 | bp_pack_value (&bp, hist != NULL, 1); | |
f0efc7aa | 80 | bp_pack_var_len_unsigned (&bp, stmt->gsbase.subcode); |
f0efc7aa DN |
81 | |
82 | /* Emit location information for the statement. */ | |
7cb7d208 RB |
83 | stream_output_location (ob, &bp, LOCATION_LOCUS (gimple_location (stmt))); |
84 | streamer_write_bitpack (&bp); | |
f0efc7aa DN |
85 | |
86 | /* Emit the lexical block holding STMT. */ | |
b9393656 | 87 | stream_write_tree (ob, gimple_block (stmt), true); |
f0efc7aa DN |
88 | |
89 | /* Emit the operands. */ | |
90 | switch (gimple_code (stmt)) | |
91 | { | |
92 | case GIMPLE_RESX: | |
412288f1 | 93 | streamer_write_hwi (ob, gimple_resx_region (stmt)); |
f0efc7aa DN |
94 | break; |
95 | ||
96 | case GIMPLE_EH_MUST_NOT_THROW: | |
b9393656 | 97 | stream_write_tree (ob, gimple_eh_must_not_throw_fndecl (stmt), true); |
f0efc7aa DN |
98 | break; |
99 | ||
100 | case GIMPLE_EH_DISPATCH: | |
412288f1 | 101 | streamer_write_hwi (ob, gimple_eh_dispatch_region (stmt)); |
f0efc7aa DN |
102 | break; |
103 | ||
104 | case GIMPLE_ASM: | |
412288f1 DN |
105 | streamer_write_uhwi (ob, gimple_asm_ninputs (stmt)); |
106 | streamer_write_uhwi (ob, gimple_asm_noutputs (stmt)); | |
107 | streamer_write_uhwi (ob, gimple_asm_nclobbers (stmt)); | |
108 | streamer_write_uhwi (ob, gimple_asm_nlabels (stmt)); | |
109 | streamer_write_string (ob, ob->main_stream, gimple_asm_string (stmt), | |
110 | true); | |
f0efc7aa DN |
111 | /* Fallthru */ |
112 | ||
113 | case GIMPLE_ASSIGN: | |
114 | case GIMPLE_CALL: | |
115 | case GIMPLE_RETURN: | |
116 | case GIMPLE_SWITCH: | |
117 | case GIMPLE_LABEL: | |
118 | case GIMPLE_COND: | |
119 | case GIMPLE_GOTO: | |
120 | case GIMPLE_DEBUG: | |
121 | for (i = 0; i < gimple_num_ops (stmt); i++) | |
122 | { | |
123 | tree op = gimple_op (stmt, i); | |
976a81ee | 124 | tree *basep = NULL; |
f0efc7aa DN |
125 | /* Wrap all uses of non-automatic variables inside MEM_REFs |
126 | so that we do not have to deal with type mismatches on | |
127 | merged symbols during IL read in. The first operand | |
128 | of GIMPLE_DEBUG must be a decl, not MEM_REF, though. */ | |
129 | if (op && (i || !is_gimple_debug (stmt))) | |
130 | { | |
976a81ee | 131 | basep = &op; |
3fede979 RB |
132 | if (TREE_CODE (*basep) == ADDR_EXPR) |
133 | basep = &TREE_OPERAND (*basep, 0); | |
f0efc7aa DN |
134 | while (handled_component_p (*basep)) |
135 | basep = &TREE_OPERAND (*basep, 0); | |
136 | if (TREE_CODE (*basep) == VAR_DECL | |
137 | && !auto_var_in_fn_p (*basep, current_function_decl) | |
138 | && !DECL_REGISTER (*basep)) | |
139 | { | |
140 | bool volatilep = TREE_THIS_VOLATILE (*basep); | |
3fede979 | 141 | tree ptrtype = build_pointer_type (TREE_TYPE (*basep)); |
f0efc7aa | 142 | *basep = build2 (MEM_REF, TREE_TYPE (*basep), |
3fede979 RB |
143 | build1 (ADDR_EXPR, ptrtype, *basep), |
144 | build_int_cst (ptrtype, 0)); | |
f0efc7aa DN |
145 | TREE_THIS_VOLATILE (*basep) = volatilep; |
146 | } | |
976a81ee RB |
147 | else |
148 | basep = NULL; | |
f0efc7aa | 149 | } |
b9393656 | 150 | stream_write_tree (ob, op, true); |
976a81ee RB |
151 | /* Restore the original base if we wrapped it inside a MEM_REF. */ |
152 | if (basep) | |
153 | *basep = TREE_OPERAND (TREE_OPERAND (*basep, 0), 0); | |
f0efc7aa DN |
154 | } |
155 | if (is_gimple_call (stmt)) | |
156 | { | |
157 | if (gimple_call_internal_p (stmt)) | |
412288f1 DN |
158 | streamer_write_enum (ob->main_stream, internal_fn, |
159 | IFN_LAST, gimple_call_internal_fn (stmt)); | |
f0efc7aa | 160 | else |
b9393656 | 161 | stream_write_tree (ob, gimple_call_fntype (stmt), true); |
f0efc7aa DN |
162 | } |
163 | break; | |
164 | ||
165 | case GIMPLE_NOP: | |
166 | case GIMPLE_PREDICT: | |
167 | break; | |
168 | ||
57ac2606 AH |
169 | case GIMPLE_TRANSACTION: |
170 | gcc_assert (gimple_transaction_body (stmt) == NULL); | |
171 | stream_write_tree (ob, gimple_transaction_label (stmt), true); | |
172 | break; | |
173 | ||
f0efc7aa DN |
174 | default: |
175 | gcc_unreachable (); | |
176 | } | |
89ab31c1 JH |
177 | if (hist) |
178 | stream_out_histogram_value (ob, hist); | |
f0efc7aa DN |
179 | } |
180 | ||
181 | ||
182 | /* Output a basic block BB to the main stream in OB for this FN. */ | |
183 | ||
184 | void | |
185 | output_bb (struct output_block *ob, basic_block bb, struct function *fn) | |
186 | { | |
187 | gimple_stmt_iterator bsi = gsi_start_bb (bb); | |
188 | ||
412288f1 DN |
189 | streamer_write_record_start (ob, |
190 | (!gsi_end_p (bsi)) || phi_nodes (bb) | |
191 | ? LTO_bb1 | |
192 | : LTO_bb0); | |
f0efc7aa | 193 | |
412288f1 | 194 | streamer_write_uhwi (ob, bb->index); |
89ab31c1 | 195 | streamer_write_gcov_count (ob, bb->count); |
412288f1 DN |
196 | streamer_write_hwi (ob, bb->frequency); |
197 | streamer_write_hwi (ob, bb->flags); | |
f0efc7aa DN |
198 | |
199 | if (!gsi_end_p (bsi) || phi_nodes (bb)) | |
200 | { | |
201 | /* Output the statements. The list of statements is terminated | |
202 | with a zero. */ | |
203 | for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi)) | |
204 | { | |
205 | int region; | |
206 | gimple stmt = gsi_stmt (bsi); | |
207 | ||
208 | output_gimple_stmt (ob, stmt); | |
209 | ||
210 | /* Emit the EH region holding STMT. */ | |
211 | region = lookup_stmt_eh_lp_fn (fn, stmt); | |
212 | if (region != 0) | |
213 | { | |
412288f1 DN |
214 | streamer_write_record_start (ob, LTO_eh_region); |
215 | streamer_write_hwi (ob, region); | |
f0efc7aa DN |
216 | } |
217 | else | |
412288f1 | 218 | streamer_write_record_start (ob, LTO_null); |
f0efc7aa DN |
219 | } |
220 | ||
412288f1 | 221 | streamer_write_record_start (ob, LTO_null); |
f0efc7aa DN |
222 | |
223 | for (bsi = gsi_start_phis (bb); !gsi_end_p (bsi); gsi_next (&bsi)) | |
224 | { | |
225 | gimple phi = gsi_stmt (bsi); | |
226 | ||
227 | /* Only emit PHIs for gimple registers. PHI nodes for .MEM | |
228 | will be filled in on reading when the SSA form is | |
229 | updated. */ | |
ea057359 | 230 | if (!virtual_operand_p (gimple_phi_result (phi))) |
f0efc7aa DN |
231 | output_phi (ob, phi); |
232 | } | |
233 | ||
412288f1 | 234 | streamer_write_record_start (ob, LTO_null); |
f0efc7aa DN |
235 | } |
236 | } |