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