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
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
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/>. */
25 #include "coretypes.h"
29 #include "tree-streamer.h"
31 #include "lto-streamer.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 /* Return a string representing LTO tag TAG. */
50 lto_tag_name (enum LTO_tags tag
)
52 if (lto_tag_is_tree_code_p (tag
))
54 /* For tags representing tree nodes, return the name of the
55 associated tree code. */
56 return get_tree_code_name (lto_tag_to_tree_code (tag
));
59 if (lto_tag_is_gimple_code_p (tag
))
61 /* For tags representing gimple statements, return the name of
62 the associated gimple code. */
63 return gimple_code_name
[lto_tag_to_gimple_code (tag
)];
75 return "LTO_eh_region";
77 return "LTO_function";
79 return "LTO_eh_table";
81 return "LTO_ert_cleanup";
84 case LTO_ert_allowed_exceptions
:
85 return "LTO_ert_allowed_exceptions";
86 case LTO_ert_must_not_throw
:
87 return "LTO_ert_must_not_throw";
88 case LTO_tree_pickle_reference
:
89 return "LTO_tree_pickle_reference";
90 case LTO_field_decl_ref
:
91 return "LTO_field_decl_ref";
92 case LTO_function_decl_ref
:
93 return "LTO_function_decl_ref";
94 case LTO_label_decl_ref
:
95 return "LTO_label_decl_ref";
96 case LTO_namespace_decl_ref
:
97 return "LTO_namespace_decl_ref";
98 case LTO_result_decl_ref
:
99 return "LTO_result_decl_ref";
100 case LTO_ssa_name_ref
:
101 return "LTO_ssa_name_ref";
102 case LTO_type_decl_ref
:
103 return "LTO_type_decl_ref";
105 return "LTO_type_ref";
106 case LTO_global_decl_ref
:
107 return "LTO_global_decl_ref";
109 return "LTO_UNKNOWN";
114 /* Allocate a bitmap from heap. Initializes the LTO obstack if necessary. */
117 lto_bitmap_alloc (void)
119 if (!lto_obstack_initialized
)
121 bitmap_obstack_initialize (<o_obstack
);
122 lto_obstack_initialized
= true;
124 return BITMAP_ALLOC (<o_obstack
);
130 lto_bitmap_free (bitmap b
)
136 /* Get a section name for a particular type or name. The NAME field
137 is only used if SECTION_TYPE is LTO_section_function_body. For all
138 others it is ignored. The callee of this function is responsible
139 to free the returned name. */
142 lto_get_section_name (int section_type
, const char *name
, struct lto_file_decl_data
*f
)
148 if (section_type
== LTO_section_function_body
)
150 gcc_assert (name
!= NULL
);
156 else if (section_type
< LTO_N_SECTION_TYPES
)
158 add
= lto_section_name
[section_type
];
162 internal_error ("bytecode stream: unexpected LTO section %s", name
);
164 /* Make the section name unique so that ld -r combining sections
165 doesn't confuse the reader with merged sections.
167 For options don't add a ID, the option reader cannot deal with them
168 and merging should be ok here. */
169 if (section_type
== LTO_section_opts
)
172 sprintf (post
, "." HOST_WIDE_INT_PRINT_HEX_PURE
, f
->id
);
174 sprintf (post
, "." HOST_WIDE_INT_PRINT_HEX_PURE
, get_random_seed (false));
175 return concat (section_name_prefix
, sep
, add
, post
, NULL
);
179 /* Show various memory usage statistics related to LTO. */
182 print_lto_report (const char *s
)
186 fprintf (stderr
, "[%s] # of input files: "
187 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
, lto_stats
.num_input_files
);
189 fprintf (stderr
, "[%s] # of input cgraph nodes: "
190 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
191 lto_stats
.num_input_cgraph_nodes
);
193 fprintf (stderr
, "[%s] # of function bodies: "
194 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
195 lto_stats
.num_function_bodies
);
197 for (i
= 0; i
< NUM_TREE_CODES
; i
++)
198 if (lto_stats
.num_trees
[i
])
199 fprintf (stderr
, "[%s] # of '%s' objects read: "
200 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
201 get_tree_code_name ((enum tree_code
) i
), lto_stats
.num_trees
[i
]);
205 fprintf (stderr
, "[%s] Compression: "
206 HOST_WIDE_INT_PRINT_UNSIGNED
" output bytes, "
207 HOST_WIDE_INT_PRINT_UNSIGNED
" compressed bytes", s
,
208 lto_stats
.num_output_il_bytes
,
209 lto_stats
.num_compressed_il_bytes
);
210 if (lto_stats
.num_output_il_bytes
> 0)
212 const float dividend
= (float) lto_stats
.num_compressed_il_bytes
;
213 const float divisor
= (float) lto_stats
.num_output_il_bytes
;
214 fprintf (stderr
, " (ratio: %f)", dividend
/ divisor
);
216 fprintf (stderr
, "\n");
221 fprintf (stderr
, "[%s] # of output files: "
222 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
223 lto_stats
.num_output_files
);
225 fprintf (stderr
, "[%s] # of output symtab nodes: "
226 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
227 lto_stats
.num_output_symtab_nodes
);
229 fprintf (stderr
, "[%s] # of output tree pickle references: "
230 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
231 lto_stats
.num_pickle_refs_output
);
232 fprintf (stderr
, "[%s] # of output tree bodies: "
233 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
234 lto_stats
.num_tree_bodies_output
);
236 fprintf (stderr
, "[%s] # callgraph partitions: "
237 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
238 lto_stats
.num_cgraph_partitions
);
240 fprintf (stderr
, "[%s] Compression: "
241 HOST_WIDE_INT_PRINT_UNSIGNED
" input bytes, "
242 HOST_WIDE_INT_PRINT_UNSIGNED
" uncompressed bytes", s
,
243 lto_stats
.num_input_il_bytes
,
244 lto_stats
.num_uncompressed_il_bytes
);
245 if (lto_stats
.num_input_il_bytes
> 0)
247 const float dividend
= (float) lto_stats
.num_uncompressed_il_bytes
;
248 const float divisor
= (float) lto_stats
.num_input_il_bytes
;
249 fprintf (stderr
, " (ratio: %f)", dividend
/ divisor
);
251 fprintf (stderr
, "\n");
254 for (i
= 0; i
< LTO_N_SECTION_TYPES
; i
++)
255 fprintf (stderr
, "[%s] Size of mmap'd section %s: "
256 HOST_WIDE_INT_PRINT_UNSIGNED
" bytes\n", s
,
257 lto_section_name
[i
], lto_stats
.section_size
[i
]);
260 /* Initialization common to the LTO reader and writer. */
263 lto_streamer_init (void)
265 /* Check that all the TS_* handled by the reader and writer routines
266 match exactly the structures defined in treestruct.def. When a
267 new TS_* astructure is added, the streamer should be updated to
270 streamer_check_handled_ts_structures ();
274 /* Gate function for all LTO streaming passes. */
279 return ((flag_generate_lto
|| flag_generate_offload
|| in_lto_p
)
280 /* Don't bother doing anything if the program has errors. */
284 /* Check that the version MAJOR.MINOR is the correct version number. */
287 lto_check_version (int major
, int minor
, const char *file_name
)
289 if (major
!= LTO_major_version
|| minor
!= LTO_minor_version
)
290 fatal_error (input_location
,
291 "bytecode stream in file %qs generated with LTO version "
292 "%d.%d instead of the expected %d.%d",
295 LTO_major_version
, LTO_minor_version
);
299 /* Initialize all the streamer hooks used for streaming GIMPLE. */
302 lto_streamer_hooks_init (void)
304 streamer_hooks_init ();
305 streamer_hooks
.write_tree
= lto_output_tree
;
306 streamer_hooks
.read_tree
= lto_input_tree
;
307 streamer_hooks
.input_location
= lto_input_location
;
308 streamer_hooks
.output_location
= lto_output_location
;