RISC-V: Add support for riscv-*-*.
[official-gcc.git] / gcc / lto-streamer.c
blobf51d66574614e5e68022a410484c53b2a60908cd
1 /* Miscellaneous utilities for GIMPLE streaming. Things that are used
2 in both input and output are here.
4 Copyright (C) 2009-2018 Free Software Foundation, Inc.
5 Contributed by Doug Kwan <dougkwan@google.com>
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
12 version.
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
23 #include "config.h"
24 #include "system.h"
25 #include "coretypes.h"
26 #include "backend.h"
27 #include "tree.h"
28 #include "gimple.h"
29 #include "tree-streamer.h"
30 #include "cgraph.h"
31 #include "lto-streamer.h"
32 #include "toplev.h"
33 #include "lto-section-names.h"
35 /* Statistics gathered during LTO, WPA and LTRANS. */
36 struct lto_stats_d lto_stats;
38 /* LTO uses bitmaps with different life-times. So use a separate
39 obstack for all LTO bitmaps. */
40 static bitmap_obstack lto_obstack;
41 static bool lto_obstack_initialized;
43 const char *section_name_prefix = LTO_SECTION_NAME_PREFIX;
44 /* Set when streaming LTO for offloading compiler. */
45 bool lto_stream_offload_p;
47 FILE *streamer_dump_file;
49 /* Return a string representing LTO tag TAG. */
51 const char *
52 lto_tag_name (enum LTO_tags tag)
54 if (lto_tag_is_tree_code_p (tag))
56 /* For tags representing tree nodes, return the name of the
57 associated tree code. */
58 return get_tree_code_name (lto_tag_to_tree_code (tag));
61 if (lto_tag_is_gimple_code_p (tag))
63 /* For tags representing gimple statements, return the name of
64 the associated gimple code. */
65 return gimple_code_name[lto_tag_to_gimple_code (tag)];
68 switch (tag)
70 case LTO_null:
71 return "LTO_null";
72 case LTO_bb0:
73 return "LTO_bb0";
74 case LTO_bb1:
75 return "LTO_bb1";
76 case LTO_eh_region:
77 return "LTO_eh_region";
78 case LTO_function:
79 return "LTO_function";
80 case LTO_eh_table:
81 return "LTO_eh_table";
82 case LTO_ert_cleanup:
83 return "LTO_ert_cleanup";
84 case LTO_ert_try:
85 return "LTO_ert_try";
86 case LTO_ert_allowed_exceptions:
87 return "LTO_ert_allowed_exceptions";
88 case LTO_ert_must_not_throw:
89 return "LTO_ert_must_not_throw";
90 case LTO_tree_pickle_reference:
91 return "LTO_tree_pickle_reference";
92 case LTO_field_decl_ref:
93 return "LTO_field_decl_ref";
94 case LTO_function_decl_ref:
95 return "LTO_function_decl_ref";
96 case LTO_label_decl_ref:
97 return "LTO_label_decl_ref";
98 case LTO_namespace_decl_ref:
99 return "LTO_namespace_decl_ref";
100 case LTO_result_decl_ref:
101 return "LTO_result_decl_ref";
102 case LTO_ssa_name_ref:
103 return "LTO_ssa_name_ref";
104 case LTO_type_decl_ref:
105 return "LTO_type_decl_ref";
106 case LTO_type_ref:
107 return "LTO_type_ref";
108 case LTO_global_decl_ref:
109 return "LTO_global_decl_ref";
110 default:
111 return "LTO_UNKNOWN";
116 /* Allocate a bitmap from heap. Initializes the LTO obstack if necessary. */
118 bitmap
119 lto_bitmap_alloc (void)
121 if (!lto_obstack_initialized)
123 bitmap_obstack_initialize (&lto_obstack);
124 lto_obstack_initialized = true;
126 return BITMAP_ALLOC (&lto_obstack);
129 /* Free bitmap B. */
131 void
132 lto_bitmap_free (bitmap b)
134 BITMAP_FREE (b);
138 /* Get a section name for a particular type or name. The NAME field
139 is only used if SECTION_TYPE is LTO_section_function_body. For all
140 others it is ignored. The callee of this function is responsible
141 to free the returned name. */
143 char *
144 lto_get_section_name (int section_type, const char *name, struct lto_file_decl_data *f)
146 const char *add;
147 char post[32];
148 const char *sep;
150 if (section_type == LTO_section_function_body)
152 gcc_assert (name != NULL);
153 if (name[0] == '*')
154 name++;
155 add = name;
156 sep = "";
158 else if (section_type < LTO_N_SECTION_TYPES)
160 add = lto_section_name[section_type];
161 sep = ".";
163 else
164 internal_error ("bytecode stream: unexpected LTO section %s", name);
166 /* Make the section name unique so that ld -r combining sections
167 doesn't confuse the reader with merged sections.
169 For options don't add a ID, the option reader cannot deal with them
170 and merging should be ok here. */
171 if (section_type == LTO_section_opts)
172 strcpy (post, "");
173 else if (f != NULL)
174 sprintf (post, "." HOST_WIDE_INT_PRINT_HEX_PURE, f->id);
175 else
176 sprintf (post, "." HOST_WIDE_INT_PRINT_HEX_PURE, get_random_seed (false));
177 return concat (section_name_prefix, sep, add, post, NULL);
181 /* Show various memory usage statistics related to LTO. */
183 void
184 print_lto_report (const char *s)
186 unsigned i;
188 fprintf (stderr, "[%s] # of input files: "
189 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, lto_stats.num_input_files);
191 fprintf (stderr, "[%s] # of input cgraph nodes: "
192 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s,
193 lto_stats.num_input_cgraph_nodes);
195 fprintf (stderr, "[%s] # of function bodies: "
196 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s,
197 lto_stats.num_function_bodies);
199 for (i = 0; i < NUM_TREE_CODES; i++)
200 if (lto_stats.num_trees[i])
201 fprintf (stderr, "[%s] # of '%s' objects read: "
202 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s,
203 get_tree_code_name ((enum tree_code) i), lto_stats.num_trees[i]);
205 if (flag_lto)
207 fprintf (stderr, "[%s] Compression: "
208 HOST_WIDE_INT_PRINT_UNSIGNED " output bytes, "
209 HOST_WIDE_INT_PRINT_UNSIGNED " compressed bytes", s,
210 lto_stats.num_output_il_bytes,
211 lto_stats.num_compressed_il_bytes);
212 if (lto_stats.num_output_il_bytes > 0)
214 const float dividend = (float) lto_stats.num_compressed_il_bytes;
215 const float divisor = (float) lto_stats.num_output_il_bytes;
216 fprintf (stderr, " (ratio: %f)", dividend / divisor);
218 fprintf (stderr, "\n");
221 if (flag_wpa)
223 fprintf (stderr, "[%s] # of output files: "
224 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s,
225 lto_stats.num_output_files);
227 fprintf (stderr, "[%s] # of output symtab nodes: "
228 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s,
229 lto_stats.num_output_symtab_nodes);
231 fprintf (stderr, "[%s] # of output tree pickle references: "
232 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s,
233 lto_stats.num_pickle_refs_output);
234 fprintf (stderr, "[%s] # of output tree bodies: "
235 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s,
236 lto_stats.num_tree_bodies_output);
238 fprintf (stderr, "[%s] # callgraph partitions: "
239 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s,
240 lto_stats.num_cgraph_partitions);
242 fprintf (stderr, "[%s] Compression: "
243 HOST_WIDE_INT_PRINT_UNSIGNED " input bytes, "
244 HOST_WIDE_INT_PRINT_UNSIGNED " uncompressed bytes", s,
245 lto_stats.num_input_il_bytes,
246 lto_stats.num_uncompressed_il_bytes);
247 if (lto_stats.num_input_il_bytes > 0)
249 const float dividend = (float) lto_stats.num_uncompressed_il_bytes;
250 const float divisor = (float) lto_stats.num_input_il_bytes;
251 fprintf (stderr, " (ratio: %f)", dividend / divisor);
253 fprintf (stderr, "\n");
256 for (i = 0; i < LTO_N_SECTION_TYPES; i++)
257 fprintf (stderr, "[%s] Size of mmap'd section %s: "
258 HOST_WIDE_INT_PRINT_UNSIGNED " bytes\n", s,
259 lto_section_name[i], lto_stats.section_size[i]);
262 /* Initialization common to the LTO reader and writer. */
264 void
265 lto_streamer_init (void)
267 /* Check that all the TS_* handled by the reader and writer routines
268 match exactly the structures defined in treestruct.def. When a
269 new TS_* astructure is added, the streamer should be updated to
270 handle it. */
271 if (flag_checking)
272 streamer_check_handled_ts_structures ();
276 /* Gate function for all LTO streaming passes. */
278 bool
279 gate_lto_out (void)
281 return ((flag_generate_lto || flag_generate_offload || in_lto_p)
282 /* Don't bother doing anything if the program has errors. */
283 && !seen_error ());
286 /* Check that the version MAJOR.MINOR is the correct version number. */
288 void
289 lto_check_version (int major, int minor, const char *file_name)
291 if (major != LTO_major_version || minor != LTO_minor_version)
292 fatal_error (input_location,
293 "bytecode stream in file %qs generated with LTO version "
294 "%d.%d instead of the expected %d.%d",
295 file_name,
296 major, minor,
297 LTO_major_version, LTO_minor_version);
301 /* Initialize all the streamer hooks used for streaming GIMPLE. */
303 void
304 lto_streamer_hooks_init (void)
306 streamer_hooks_init ();
307 streamer_hooks.write_tree = lto_output_tree;
308 streamer_hooks.read_tree = lto_input_tree;
309 streamer_hooks.input_location = lto_input_location;
310 streamer_hooks.output_location = lto_output_location;