1 /* Miscellaneous utilities for GIMPLE streaming. Things that are used
2 in both input and output are here.
4 Copyright (C) 2009-2022 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 const char *section_name_prefix
= LTO_SECTION_NAME_PREFIX
;
39 /* Set when streaming LTO for offloading compiler. */
40 bool lto_stream_offload_p
;
42 FILE *streamer_dump_file
;
44 /* Return a string representing LTO tag TAG. */
47 lto_tag_name (enum LTO_tags tag
)
49 if (lto_tag_is_tree_code_p (tag
))
51 /* For tags representing tree nodes, return the name of the
52 associated tree code. */
53 return get_tree_code_name (lto_tag_to_tree_code (tag
));
56 if (lto_tag_is_gimple_code_p (tag
))
58 /* For tags representing gimple statements, return the name of
59 the associated gimple code. */
60 return gimple_code_name
[lto_tag_to_gimple_code (tag
)];
72 return "LTO_eh_region";
74 return "LTO_function";
76 return "LTO_eh_table";
78 return "LTO_ert_cleanup";
81 case LTO_ert_allowed_exceptions
:
82 return "LTO_ert_allowed_exceptions";
83 case LTO_ert_must_not_throw
:
84 return "LTO_ert_must_not_throw";
85 case LTO_tree_pickle_reference
:
86 return "LTO_tree_pickle_reference";
87 case LTO_global_stream_ref
:
88 return "LTO_global_sream_ref";
89 case LTO_ssa_name_ref
:
90 return "LTO_ssa_name_ref";
97 /* Get a section name for a particular type or name. The NAME field
98 is only used if SECTION_TYPE is LTO_section_function_body. For all
99 others it is ignored. The callee of this function is responsible
100 to free the returned name. */
103 lto_get_section_name (int section_type
, const char *name
,
104 int node_order
, struct lto_file_decl_data
*f
)
111 if (section_type
== LTO_section_function_body
)
113 gcc_assert (name
!= NULL
);
117 buffer
= (char *)xmalloc (strlen (name
) + 32);
118 sprintf (buffer
, "%s.%d", name
, node_order
);
123 else if (section_type
< LTO_N_SECTION_TYPES
)
125 add
= lto_section_name
[section_type
];
129 internal_error ("bytecode stream: unexpected LTO section %s", name
);
131 /* Make the section name unique so that ld -r combining sections
132 doesn't confuse the reader with merged sections.
134 For options don't add a ID, the option reader cannot deal with them
135 and merging should be ok here. */
136 if (section_type
== LTO_section_opts
)
139 sprintf (post
, "." HOST_WIDE_INT_PRINT_HEX_PURE
, f
->id
);
141 sprintf (post
, "." HOST_WIDE_INT_PRINT_HEX_PURE
, get_random_seed (false));
142 char *res
= concat (section_name_prefix
, sep
, add
, post
, NULL
);
149 /* Show various memory usage statistics related to LTO. */
152 print_lto_report (const char *s
)
156 fprintf (stderr
, "[%s] # of input files: "
157 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
, lto_stats
.num_input_files
);
159 fprintf (stderr
, "[%s] # of input cgraph nodes: "
160 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
161 lto_stats
.num_input_cgraph_nodes
);
163 fprintf (stderr
, "[%s] # of function bodies: "
164 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
165 lto_stats
.num_function_bodies
);
167 for (i
= 0; i
< NUM_TREE_CODES
; i
++)
168 if (lto_stats
.num_trees
[i
])
169 fprintf (stderr
, "[%s] # of '%s' objects read: "
170 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
171 get_tree_code_name ((enum tree_code
) i
), lto_stats
.num_trees
[i
]);
175 fprintf (stderr
, "[%s] Compression: "
176 HOST_WIDE_INT_PRINT_UNSIGNED
" output bytes, "
177 HOST_WIDE_INT_PRINT_UNSIGNED
" compressed bytes", s
,
178 lto_stats
.num_output_il_bytes
,
179 lto_stats
.num_compressed_il_bytes
);
180 if (lto_stats
.num_output_il_bytes
> 0)
182 const float dividend
= (float) lto_stats
.num_compressed_il_bytes
;
183 const float divisor
= (float) lto_stats
.num_output_il_bytes
;
184 fprintf (stderr
, " (ratio: %f)", dividend
/ divisor
);
186 fprintf (stderr
, "\n");
191 fprintf (stderr
, "[%s] # of output files: "
192 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
193 lto_stats
.num_output_files
);
195 fprintf (stderr
, "[%s] # of output symtab nodes: "
196 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
197 lto_stats
.num_output_symtab_nodes
);
199 fprintf (stderr
, "[%s] # of output tree pickle references: "
200 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
201 lto_stats
.num_pickle_refs_output
);
202 fprintf (stderr
, "[%s] # of output tree bodies: "
203 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
204 lto_stats
.num_tree_bodies_output
);
206 fprintf (stderr
, "[%s] # callgraph partitions: "
207 HOST_WIDE_INT_PRINT_UNSIGNED
"\n", s
,
208 lto_stats
.num_cgraph_partitions
);
210 fprintf (stderr
, "[%s] Compression: "
211 HOST_WIDE_INT_PRINT_UNSIGNED
" input bytes, "
212 HOST_WIDE_INT_PRINT_UNSIGNED
" uncompressed bytes", s
,
213 lto_stats
.num_input_il_bytes
,
214 lto_stats
.num_uncompressed_il_bytes
);
215 if (lto_stats
.num_input_il_bytes
> 0)
217 const float dividend
= (float) lto_stats
.num_uncompressed_il_bytes
;
218 const float divisor
= (float) lto_stats
.num_input_il_bytes
;
219 fprintf (stderr
, " (ratio: %f)", dividend
/ divisor
);
221 fprintf (stderr
, "\n");
224 for (i
= 0; i
< LTO_N_SECTION_TYPES
; i
++)
225 fprintf (stderr
, "[%s] Size of mmap'd section %s: "
226 HOST_WIDE_INT_PRINT_UNSIGNED
" bytes\n", s
,
227 lto_section_name
[i
], lto_stats
.section_size
[i
]);
230 /* Initialization common to the LTO reader and writer. */
233 lto_streamer_init (void)
235 /* Check that all the TS_* handled by the reader and writer routines
236 match exactly the structures defined in treestruct.def. When a
237 new TS_* astructure is added, the streamer should be updated to
240 streamer_check_handled_ts_structures ();
244 /* Gate function for all LTO streaming passes. */
249 return ((flag_generate_lto
|| flag_generate_offload
|| in_lto_p
)
250 /* Don't bother doing anything if the program has errors. */
254 /* Check that the version MAJOR.MINOR is the correct version number. */
257 lto_check_version (int major
, int minor
, const char *file_name
)
259 if (major
!= LTO_major_version
|| minor
!= LTO_minor_version
)
260 fatal_error (input_location
,
261 "bytecode stream in file %qs generated with LTO version "
262 "%d.%d instead of the expected %d.%d",
265 LTO_major_version
, LTO_minor_version
);
269 /* Initialize all the streamer hooks used for streaming GIMPLE. */
272 lto_streamer_hooks_init (void)
274 streamer_hooks_init ();
275 streamer_hooks
.write_tree
= lto_output_tree
;
276 streamer_hooks
.read_tree
= lto_input_tree
;
277 streamer_hooks
.input_location
= lto_input_location
;
278 streamer_hooks
.output_location
= lto_output_location
;
279 streamer_hooks
.output_location_and_block
= lto_output_location_and_block
;