| /* Data structures and declarations used for reading and writing |
| GIMPLE to a file stream. |
| |
| Copyright (C) 2009-2021 Free Software Foundation, Inc. |
| Contributed by Doug Kwan <dougkwan@google.com> |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef GCC_LTO_STREAMER_H |
| #define GCC_LTO_STREAMER_H |
| |
| #include "plugin-api.h" |
| #include "gcov-io.h" |
| #include "diagnostic.h" |
| |
| /* The encoding for a function consists of the following sections: |
| |
| 1) The header. |
| 2) FIELD_DECLS. |
| 3) FUNCTION_DECLS. |
| 4) global VAR_DECLS. |
| 5) type_decls |
| 6) types. |
| 7) Names for the labels that have names |
| 8) The SSA names. |
| 9) The control flow graph. |
| 10-11)Gimple for local decls. |
| 12) Gimple for the function. |
| 13) Strings. |
| |
| 1) THE HEADER. |
| 2-6) THE GLOBAL DECLS AND TYPES. |
| |
| The global decls and types are encoded in the same way. For each |
| entry, there is word with the offset within the section to the |
| entry. |
| |
| 7) THE LABEL NAMES. |
| |
| Since most labels do not have names, this section my be of zero |
| length. It consists of an array of string table references, one |
| per label. In the lto code, the labels are given either |
| positive or negative indexes. the positive ones have names and |
| the negative ones do not. The positive index can be used to |
| find the name in this array. |
| |
| 9) THE CFG. |
| |
| 10) Index into the local decls. Since local decls can have local |
| decls inside them, they must be read in randomly in order to |
| properly restore them. |
| |
| 11-12) GIMPLE FOR THE LOCAL DECLS AND THE FUNCTION BODY. |
| |
| The gimple consists of a set of records. |
| |
| THE FUNCTION |
| |
| At the top level of (8) is the function. It consists of five |
| pieces: |
| |
| LTO_function - The tag. |
| eh tree - This is all of the exception handling regions |
| put out in a post order traversial of the |
| tree. Siblings are output as lists terminated |
| by a 0. The set of fields matches the fields |
| defined in except.c. |
| |
| last_basic_block - in uleb128 form. |
| |
| basic blocks - This is the set of basic blocks. |
| |
| zero - The termination of the basic blocks. |
| |
| BASIC BLOCKS |
| |
| There are two forms of basic blocks depending on if they are |
| empty or not. |
| |
| The basic block consists of: |
| |
| LTO_bb1 or LTO_bb0 - The tag. |
| |
| bb->index - the index in uleb128 form. |
| |
| #succs - The number of successors un uleb128 form. |
| |
| the successors - For each edge, a pair. The first of the |
| pair is the index of the successor in |
| uleb128 form and the second are the flags in |
| uleb128 form. |
| |
| the statements - A gimple tree, as described above. |
| These are only present for LTO_BB1. |
| Following each statement is an optional |
| exception handling record LTO_eh_region |
| which contains the region number (for |
| regions >= 0). |
| |
| zero - This is only present for LTO_BB1 and is used |
| to terminate the statements and exception |
| regions within this block. |
| |
| 12) STRINGS |
| |
| String are represented in the table as pairs, a length in ULEB128 |
| form followed by the data for the string. */ |
| |
| #define LTO_major_version 11 |
| #define LTO_minor_version 0 |
| |
| typedef unsigned char lto_decl_flags_t; |
| |
| /* Stream additional data to LTO object files to make it easier to debug |
| streaming code. This changes object files. */ |
| static const bool streamer_debugging = false; |
| |
| /* Tags representing the various IL objects written to the bytecode file |
| (GIMPLE statements, basic blocks, EH regions, tree nodes, etc). |
| |
| NOTE, when adding new LTO tags, also update lto_tag_name. */ |
| enum LTO_tags |
| { |
| LTO_null = 0, |
| |
| /* Reference to previously-streamed node. */ |
| LTO_tree_pickle_reference, |
| |
| /* References to indexable tree nodes. These objects are stored in |
| tables that are written separately from the function bodies |
| and variable constructors that reference them. This way they can be |
| instantiated even when the referencing functions aren't (e.g., during WPA) |
| and it also allows functions to be copied from one file to another without |
| having to unpickle the body first (the references are location |
| independent). */ |
| LTO_global_stream_ref, |
| |
| LTO_ssa_name_ref, |
| |
| /* Special for global streamer. A blob of unnamed tree nodes. */ |
| LTO_tree_scc, |
| |
| /* Sequence of trees. */ |
| LTO_trees, |
| |
| /* Shared INTEGER_CST node. */ |
| LTO_integer_cst, |
| |
| /* Tags of trees are encoded as |
| LTO_first_tree_tag + TREE_CODE. */ |
| LTO_first_tree_tag, |
| /* Tags of gimple typles are encoded as |
| LTO_first_gimple_tag + gimple_code. */ |
| LTO_first_gimple_tag = LTO_first_tree_tag + MAX_TREE_CODES, |
| |
| /* Entry and exit basic blocks. */ |
| LTO_bb0 = LTO_first_gimple_tag + LAST_AND_UNUSED_GIMPLE_CODE, |
| LTO_bb1, |
| |
| /* EH region holding the previous statement. */ |
| LTO_eh_region, |
| |
| /* Function body. */ |
| LTO_function, |
| |
| /* EH table. */ |
| LTO_eh_table, |
| |
| /* EH region types. These mirror enum eh_region_type. */ |
| LTO_ert_cleanup, |
| LTO_ert_try, |
| LTO_ert_allowed_exceptions, |
| LTO_ert_must_not_throw, |
| |
| /* EH landing pad. */ |
| LTO_eh_landing_pad, |
| |
| /* EH try/catch node. */ |
| LTO_eh_catch, |
| |
| /* This tag must always be last. */ |
| LTO_NUM_TAGS |
| }; |
| |
| |
| /* Set of section types that are in an LTO file. This list will grow |
| as the number of IPA passes grows since each IPA pass will need its |
| own section type to store its summary information. |
| |
| When adding a new section type, you must also extend the |
| LTO_SECTION_NAME array in lto-section-in.c. */ |
| enum lto_section_type |
| { |
| LTO_section_decls = 0, |
| LTO_section_function_body, |
| LTO_section_static_initializer, |
| LTO_section_symtab, |
| LTO_section_symtab_extension, |
| LTO_section_refs, |
| LTO_section_asm, |
| LTO_section_jump_functions, |
| LTO_section_ipa_pure_const, |
| LTO_section_ipa_reference, |
| LTO_section_ipa_profile, |
| LTO_section_symtab_nodes, |
| LTO_section_opts, |
| LTO_section_cgraph_opt_sum, |
| LTO_section_ipa_fn_summary, |
| LTO_section_ipcp_transform, |
| LTO_section_ipa_icf, |
| LTO_section_offload_table, |
| LTO_section_mode_table, |
| LTO_section_lto, |
| LTO_section_ipa_sra, |
| LTO_section_odr_types, |
| LTO_section_ipa_modref, |
| LTO_N_SECTION_TYPES /* Must be last. */ |
| }; |
| |
| /* Indices to the various function, type and symbol streams. */ |
| enum lto_decl_stream_e_t |
| { |
| LTO_DECL_STREAM = 0, /* Must be first. */ |
| LTO_N_DECL_STREAMS |
| }; |
| |
| typedef enum ld_plugin_symbol_resolution ld_plugin_symbol_resolution_t; |
| |
| /* Return a char pointer to the start of a data stream for an lto pass |
| or function. The first parameter is the file data that contains |
| the information. The second parameter is the type of information |
| to be obtained. The third parameter is the name of the function |
| and is only used when finding a function body; otherwise it is |
| NULL. The fourth parameter is the length of the data returned. */ |
| typedef const char* (lto_get_section_data_f) (struct lto_file_decl_data *, |
| enum lto_section_type, |
| const char *, |
| int, |
| size_t *); |
| |
| /* Return the data found from the above call. The first three |
| parameters are the same as above. The fourth parameter is the data |
| itself and the fifth is the length of the data. */ |
| typedef void (lto_free_section_data_f) (struct lto_file_decl_data *, |
| enum lto_section_type, |
| const char *, |
| const char *, |
| size_t); |
| |
| /* The location cache holds expanded locations for streamed in trees. |
| This is done to reduce memory usage of libcpp linemap that strongly prefers |
| locations to be inserted in the source order. */ |
| |
| class lto_location_cache |
| { |
| public: |
| /* Apply all changes in location cache. Add locations into linemap and patch |
| trees. */ |
| bool apply_location_cache (); |
| /* Tree merging did not suceed; mark all changes in the cache as accepted. */ |
| void accept_location_cache (); |
| /* Tree merging did suceed; throw away recent changes. */ |
| void revert_location_cache (); |
| void input_location (location_t *loc, struct bitpack_d *bp, |
| class data_in *data_in); |
| void input_location_and_block (location_t *loc, struct bitpack_d *bp, |
| class lto_input_block *ib, |
| class data_in *data_in); |
| lto_location_cache () |
| : loc_cache (), accepted_length (0), current_file (NULL), current_line (0), |
| current_col (0), current_sysp (false), current_loc (UNKNOWN_LOCATION), |
| current_block (NULL_TREE) |
| { |
| gcc_assert (!current_cache); |
| current_cache = this; |
| } |
| ~lto_location_cache () |
| { |
| apply_location_cache (); |
| gcc_assert (current_cache == this); |
| current_cache = NULL; |
| } |
| |
| /* There can be at most one instance of location cache (combining multiple |
| would bring it out of sync with libcpp linemap); point to current |
| one. */ |
| static lto_location_cache *current_cache; |
| |
| private: |
| static int cmp_loc (const void *pa, const void *pb); |
| |
| struct cached_location |
| { |
| const char *file; |
| location_t *loc; |
| int line, col; |
| bool sysp; |
| tree block; |
| }; |
| |
| /* The location cache. */ |
| |
| auto_vec<cached_location> loc_cache; |
| |
| /* Accepted entries are ones used by trees that are known to be not unified |
| by tree merging. */ |
| |
| int accepted_length; |
| |
| /* Bookkeeping to remember state in between calls to lto_apply_location_cache |
| When streaming gimple, the location cache is not used and thus |
| lto_apply_location_cache happens per location basis. It is then |
| useful to avoid redundant calls of linemap API. */ |
| |
| const char *current_file; |
| int current_line; |
| int current_col; |
| bool current_sysp; |
| location_t current_loc; |
| tree current_block; |
| }; |
| |
| /* Structure used as buffer for reading an LTO file. */ |
| class lto_input_block |
| { |
| public: |
| /* Special constructor for the string table, it abuses this to |
| do random access but use the uhwi decoder. */ |
| lto_input_block (const char *data_, unsigned int p_, unsigned int len_, |
| const unsigned char *mode_table_) |
| : data (data_), mode_table (mode_table_), p (p_), len (len_) {} |
| lto_input_block (const char *data_, unsigned int len_, |
| const unsigned char *mode_table_) |
| : data (data_), mode_table (mode_table_), p (0), len (len_) {} |
| |
| const char *data; |
| const unsigned char *mode_table; |
| unsigned int p; |
| unsigned int len; |
| }; |
| |
| /* Compression algorithm used for compression of LTO bytecode. */ |
| |
| enum lto_compression |
| { |
| ZLIB, |
| ZSTD |
| }; |
| |
| /* Structure that represents LTO ELF section with information |
| about the format. */ |
| |
| struct lto_section |
| { |
| int16_t major_version; |
| int16_t minor_version; |
| unsigned char slim_object; |
| unsigned char _padding; |
| |
| /* Flags is a private field that is not defined publicly. */ |
| uint16_t flags; |
| |
| /* Set compression to FLAGS. */ |
| inline void set_compression (lto_compression c) |
| { |
| flags = c; |
| } |
| |
| /* Get compression from FLAGS. */ |
| inline lto_compression get_compression () |
| { |
| return (lto_compression) flags; |
| } |
| }; |
| |
| STATIC_ASSERT (sizeof (lto_section) == 8); |
| |
| /* The is the first part of the record in an LTO file for many of the |
| IPA passes. */ |
| struct lto_simple_header |
| { |
| /* Size of main gimple body of function. */ |
| int32_t main_size; |
| }; |
| |
| struct lto_simple_header_with_strings : lto_simple_header |
| { |
| /* Size of the string table. */ |
| int32_t string_size; |
| }; |
| |
| /* The header for a function body. */ |
| struct lto_function_header : lto_simple_header_with_strings |
| { |
| /* Size of the cfg. */ |
| int32_t cfg_size; |
| }; |
| |
| |
| /* Structure describing a symbol section. */ |
| struct lto_decl_header : lto_simple_header_with_strings |
| { |
| /* Size of region for decl state. */ |
| int32_t decl_state_size; |
| |
| /* Number of nodes in globals stream. */ |
| int32_t num_nodes; |
| }; |
| |
| |
| /* Statistics gathered during LTO, WPA and LTRANS. */ |
| struct lto_stats_d |
| { |
| unsigned HOST_WIDE_INT num_input_cgraph_nodes; |
| unsigned HOST_WIDE_INT num_output_symtab_nodes; |
| unsigned HOST_WIDE_INT num_input_files; |
| unsigned HOST_WIDE_INT num_output_files; |
| unsigned HOST_WIDE_INT num_cgraph_partitions; |
| unsigned HOST_WIDE_INT section_size[LTO_N_SECTION_TYPES]; |
| unsigned HOST_WIDE_INT num_function_bodies; |
| unsigned HOST_WIDE_INT num_trees[NUM_TREE_CODES]; |
| unsigned HOST_WIDE_INT num_output_il_bytes; |
| unsigned HOST_WIDE_INT num_compressed_il_bytes; |
| unsigned HOST_WIDE_INT num_input_il_bytes; |
| unsigned HOST_WIDE_INT num_uncompressed_il_bytes; |
| unsigned HOST_WIDE_INT num_tree_bodies_output; |
| unsigned HOST_WIDE_INT num_pickle_refs_output; |
| }; |
| |
| /* Entry of LTO symtab encoder. */ |
| struct lto_encoder_entry |
| { |
| symtab_node *node; |
| /* Is the node in this partition (i.e. ltrans of this partition will |
| be responsible for outputting it)? */ |
| unsigned int in_partition:1; |
| /* Do we encode body in this partition? */ |
| unsigned int body:1; |
| /* Do we encode initializer in this partition? |
| For example the readonly variable initializers are encoded to aid |
| constant folding even if they are not in the partition. */ |
| unsigned int initializer:1; |
| }; |
| |
| |
| /* Encoder data structure used to stream callgraph nodes. */ |
| struct lto_symtab_encoder_d |
| { |
| vec<lto_encoder_entry> nodes; |
| hash_map<symtab_node *, size_t> *map; |
| }; |
| |
| typedef struct lto_symtab_encoder_d *lto_symtab_encoder_t; |
| |
| /* Iterator structure for cgraph node sets. */ |
| struct lto_symtab_encoder_iterator |
| { |
| lto_symtab_encoder_t encoder; |
| unsigned index; |
| }; |
| |
| |
| |
| /* The lto_tree_ref_encoder struct is used to encode trees into indices. */ |
| |
| struct lto_tree_ref_encoder |
| { |
| hash_map<tree, unsigned> *tree_hash_table; /* Maps pointers to indices. */ |
| vec<tree> trees; /* Maps indices to pointers. */ |
| }; |
| |
| |
| /* Structure to hold states of input scope. */ |
| struct GTY((for_user)) lto_in_decl_state |
| { |
| /* Array of lto_in_decl_buffers to store type and decls streams. */ |
| vec<tree, va_gc> *streams[LTO_N_DECL_STREAMS]; |
| |
| /* If this in-decl state is associated with a function. FN_DECL |
| point to the FUNCTION_DECL. */ |
| tree fn_decl; |
| |
| /* True if decl state is compressed. */ |
| bool compressed; |
| }; |
| |
| typedef struct lto_in_decl_state *lto_in_decl_state_ptr; |
| |
| struct decl_state_hasher : ggc_ptr_hash<lto_in_decl_state> |
| { |
| static hashval_t |
| hash (lto_in_decl_state *s) |
| { |
| return htab_hash_pointer (s->fn_decl); |
| } |
| |
| static bool |
| equal (lto_in_decl_state *a, lto_in_decl_state *b) |
| { |
| return a->fn_decl == b->fn_decl; |
| } |
| }; |
| |
| /* The structure that holds all of the vectors of global types, |
| decls and cgraph nodes used in the serialization of this file. */ |
| struct lto_out_decl_state |
| { |
| /* The buffers contain the sets of decls of various kinds and types we have |
| seen so far and the indexes assigned to them. */ |
| struct lto_tree_ref_encoder streams[LTO_N_DECL_STREAMS]; |
| |
| /* Encoder for cgraph nodes. */ |
| lto_symtab_encoder_t symtab_node_encoder; |
| |
| /* If this out-decl state belongs to a function, fn_decl points to that |
| function. Otherwise, it is NULL. */ |
| tree fn_decl; |
| |
| /* True if decl state is compressed. */ |
| bool compressed; |
| }; |
| |
| typedef struct lto_out_decl_state *lto_out_decl_state_ptr; |
| |
| |
| /* Compact representation of a index <-> resolution pair. Unpacked to an |
| vector later. */ |
| struct res_pair |
| { |
| ld_plugin_symbol_resolution_t res; |
| unsigned index; |
| }; |
| |
| |
| /* One of these is allocated for each object file that being compiled |
| by lto. This structure contains the tables that are needed by the |
| serialized functions and ipa passes to connect themselves to the |
| global types and decls as they are reconstituted. */ |
| struct GTY(()) lto_file_decl_data |
| { |
| /* Decl state currently used. */ |
| struct lto_in_decl_state *current_decl_state; |
| |
| /* Decl state corresponding to regions outside of any functions |
| in the compilation unit. */ |
| struct lto_in_decl_state *global_decl_state; |
| |
| /* Table of cgraph nodes present in this file. */ |
| lto_symtab_encoder_t GTY((skip)) symtab_node_encoder; |
| |
| /* Hash table maps lto-related section names to location in file. */ |
| hash_table<decl_state_hasher> *function_decl_states; |
| |
| /* The .o file that these offsets relate to. */ |
| const char *GTY((skip)) file_name; |
| |
| /* Hash table maps lto-related section names to location in file. */ |
| htab_t GTY((skip)) section_hash_table; |
| |
| /* Hash new name of renamed global declaration to its original name. */ |
| htab_t GTY((skip)) renaming_hash_table; |
| |
| /* Linked list used temporarily in reader */ |
| struct lto_file_decl_data *next; |
| |
| /* Order in which the file appears on the command line. */ |
| int order; |
| |
| /* Sub ID for merged objects. */ |
| unsigned HOST_WIDE_INT id; |
| |
| /* Symbol resolutions for this file */ |
| vec<res_pair> GTY((skip)) respairs; |
| unsigned max_index; |
| |
| gcov_summary GTY((skip)) profile_info; |
| |
| /* Map assigning declarations their resolutions. */ |
| hash_map<tree, ld_plugin_symbol_resolution> * GTY((skip)) resolution_map; |
| |
| /* Mode translation table. */ |
| const unsigned char *mode_table; |
| |
| /* Read LTO section. */ |
| lto_section lto_section_header; |
| |
| int order_base; |
| |
| int unit_base; |
| }; |
| |
| typedef struct lto_file_decl_data *lto_file_decl_data_ptr; |
| |
| struct lto_char_ptr_base |
| { |
| char *ptr; |
| }; |
| |
| /* An incore byte stream to buffer the various parts of the function. |
| The entire structure should be zeroed when created. The record |
| consists of a set of blocks. The first sizeof (ptr) bytes are used |
| as a chain, and the rest store the bytes to be written. */ |
| struct lto_output_stream |
| { |
| /* The pointer to the first block in the stream. */ |
| struct lto_char_ptr_base * first_block; |
| |
| /* The pointer to the last and current block in the stream. */ |
| struct lto_char_ptr_base * current_block; |
| |
| /* The pointer to where the next char should be written. */ |
| char * current_pointer; |
| |
| /* The number of characters left in the current block. */ |
| unsigned int left_in_block; |
| |
| /* The block size of the last block allocated. */ |
| unsigned int block_size; |
| |
| /* The total number of characters written. */ |
| unsigned int total_size; |
| }; |
| |
| /* A simple output block. This can be used for simple IPA passes that |
| do not need more than one stream. */ |
| struct lto_simple_output_block |
| { |
| enum lto_section_type section_type; |
| struct lto_out_decl_state *decl_state; |
| |
| /* The stream that the main tree codes are written to. */ |
| struct lto_output_stream *main_stream; |
| }; |
| |
| /* String hashing. */ |
| |
| struct string_slot |
| { |
| const char *s; |
| int len; |
| unsigned int slot_num; |
| }; |
| |
| /* Hashtable helpers. */ |
| |
| struct string_slot_hasher : nofree_ptr_hash <string_slot> |
| { |
| static inline hashval_t hash (const string_slot *); |
| static inline bool equal (const string_slot *, const string_slot *); |
| }; |
| |
| /* Returns a hash code for DS. Adapted from libiberty's htab_hash_string |
| to support strings that may not end in '\0'. */ |
| |
| inline hashval_t |
| string_slot_hasher::hash (const string_slot *ds) |
| { |
| hashval_t r = ds->len; |
| int i; |
| |
| for (i = 0; i < ds->len; i++) |
| r = r * 67 + (unsigned)ds->s[i] - 113; |
| return r; |
| } |
| |
| /* Returns nonzero if DS1 and DS2 are equal. */ |
| |
| inline bool |
| string_slot_hasher::equal (const string_slot *ds1, const string_slot *ds2) |
| { |
| if (ds1->len == ds2->len) |
| return memcmp (ds1->s, ds2->s, ds1->len) == 0; |
| |
| return 0; |
| } |
| |
| /* Data structure holding all the data and descriptors used when writing |
| an LTO file. */ |
| struct output_block |
| { |
| enum lto_section_type section_type; |
| struct lto_out_decl_state *decl_state; |
| |
| /* The stream that the main tree codes are written to. */ |
| struct lto_output_stream *main_stream; |
| |
| /* The stream that contains the string table. */ |
| struct lto_output_stream *string_stream; |
| |
| /* The stream that contains the cfg. */ |
| struct lto_output_stream *cfg_stream; |
| |
| /* The hash table that contains the set of strings we have seen so |
| far and the indexes assigned to them. */ |
| hash_table<string_slot_hasher> *string_hash_table; |
| |
| /* The current symbol that we are currently serializing. Null |
| if we are serializing something else. */ |
| symtab_node *symbol; |
| |
| /* These are the last file and line that were seen in the stream. |
| If the current node differs from these, it needs to insert |
| something into the stream and fix these up. */ |
| const char *current_file; |
| int current_line; |
| int current_col; |
| bool current_sysp; |
| bool reset_locus; |
| bool emit_pwd; |
| tree current_block; |
| |
| /* Cache of nodes written in this section. */ |
| struct streamer_tree_cache_d *writer_cache; |
| |
| /* All trees identified as local to the unit streamed. */ |
| hash_set<tree> *local_trees; |
| |
| /* All data persistent across whole duration of output block |
| can go here. */ |
| struct obstack obstack; |
| }; |
| |
| |
| /* Data and descriptors used when reading from an LTO file. */ |
| class data_in |
| { |
| public: |
| /* The global decls and types. */ |
| struct lto_file_decl_data *file_data; |
| |
| /* The string table. */ |
| const char *strings; |
| |
| /* The length of the string table. */ |
| unsigned int strings_len; |
| |
| /* Maps each reference number to the resolution done by the linker. */ |
| vec<ld_plugin_symbol_resolution_t> globals_resolution; |
| |
| /* Cache of pickled nodes. */ |
| struct streamer_tree_cache_d *reader_cache; |
| |
| /* Cache of source code location. */ |
| lto_location_cache location_cache; |
| }; |
| |
| |
| /* In lto-section-in.c */ |
| extern class lto_input_block * lto_create_simple_input_block ( |
| struct lto_file_decl_data *, |
| enum lto_section_type, const char **, size_t *); |
| extern void |
| lto_destroy_simple_input_block (struct lto_file_decl_data *, |
| enum lto_section_type, |
| class lto_input_block *, const char *, size_t); |
| extern void lto_set_in_hooks (struct lto_file_decl_data **, |
| lto_get_section_data_f *, |
| lto_free_section_data_f *); |
| extern struct lto_file_decl_data **lto_get_file_decl_data (void); |
| extern const char *lto_get_section_data (struct lto_file_decl_data *, |
| enum lto_section_type, |
| const char *, int, size_t *, |
| bool decompress = false); |
| extern const char *lto_get_summary_section_data (struct lto_file_decl_data *, |
| enum lto_section_type, |
| size_t *); |
| extern const char *lto_get_raw_section_data (struct lto_file_decl_data *, |
| enum lto_section_type, |
| const char *, int, size_t *); |
| extern void lto_free_section_data (struct lto_file_decl_data *, |
| enum lto_section_type, |
| const char *, const char *, size_t, |
| bool decompress = false); |
| extern void lto_free_raw_section_data (struct lto_file_decl_data *, |
| enum lto_section_type, |
| const char *, const char *, size_t); |
| extern htab_t lto_create_renaming_table (void); |
| extern void lto_record_renamed_decl (struct lto_file_decl_data *, |
| const char *, const char *); |
| extern const char *lto_get_decl_name_mapping (struct lto_file_decl_data *, |
| const char *); |
| extern struct lto_in_decl_state *lto_new_in_decl_state (void); |
| extern void lto_delete_in_decl_state (struct lto_in_decl_state *); |
| extern struct lto_in_decl_state *lto_get_function_in_decl_state ( |
| struct lto_file_decl_data *, tree); |
| extern void lto_free_function_in_decl_state (struct lto_in_decl_state *); |
| extern void lto_free_function_in_decl_state_for_node (symtab_node *); |
| extern void lto_section_overrun (class lto_input_block *) ATTRIBUTE_NORETURN; |
| extern void lto_value_range_error (const char *, |
| HOST_WIDE_INT, HOST_WIDE_INT, |
| HOST_WIDE_INT) ATTRIBUTE_NORETURN; |
| |
| /* In lto-section-out.c */ |
| extern void lto_begin_section (const char *, bool); |
| extern void lto_end_section (void); |
| extern void lto_write_data (const void *, unsigned int); |
| extern void lto_write_raw_data (const void *, unsigned int); |
| extern void lto_write_stream (struct lto_output_stream *); |
| extern struct lto_simple_output_block *lto_create_simple_output_block ( |
| enum lto_section_type); |
| extern void lto_destroy_simple_output_block (struct lto_simple_output_block *); |
| extern struct lto_out_decl_state *lto_new_out_decl_state (void); |
| extern void lto_delete_out_decl_state (struct lto_out_decl_state *); |
| extern struct lto_out_decl_state *lto_get_out_decl_state (void); |
| extern void lto_push_out_decl_state (struct lto_out_decl_state *); |
| extern struct lto_out_decl_state *lto_pop_out_decl_state (void); |
| extern void lto_record_function_out_decl_state (tree, |
| struct lto_out_decl_state *); |
| extern void lto_append_block (struct lto_output_stream *); |
| |
| |
| /* In lto-streamer.c. */ |
| |
| /* Set when streaming LTO for offloading compiler. */ |
| extern bool lto_stream_offload_p; |
| |
| extern const char *lto_tag_name (enum LTO_tags); |
| extern char *lto_get_section_name (int, const char *, int, |
| struct lto_file_decl_data *); |
| extern void print_lto_report (const char *); |
| extern void lto_streamer_init (void); |
| extern bool gate_lto_out (void); |
| extern void lto_check_version (int, int, const char *); |
| extern void lto_streamer_hooks_init (void); |
| |
| /* In lto-streamer-in.c */ |
| extern void lto_input_cgraph (struct lto_file_decl_data *, const char *); |
| extern void lto_reader_init (void); |
| extern void lto_free_file_name_hash (void); |
| extern void lto_input_function_body (struct lto_file_decl_data *, |
| struct cgraph_node *, |
| const char *); |
| extern void lto_input_variable_constructor (struct lto_file_decl_data *, |
| struct varpool_node *, |
| const char *); |
| extern void lto_input_constructors_and_inits (struct lto_file_decl_data *, |
| const char *); |
| extern void lto_input_toplevel_asms (struct lto_file_decl_data *, int); |
| extern void lto_input_mode_table (struct lto_file_decl_data *); |
| extern class data_in *lto_data_in_create (struct lto_file_decl_data *, |
| const char *, unsigned, |
| vec<ld_plugin_symbol_resolution_t> ); |
| extern void lto_data_in_delete (class data_in *); |
| extern void lto_input_data_block (class lto_input_block *, void *, size_t); |
| void lto_input_location (location_t *, struct bitpack_d *, class data_in *); |
| tree lto_input_tree_ref (class lto_input_block *, class data_in *, |
| struct function *, enum LTO_tags); |
| void lto_tag_check_set (enum LTO_tags, int, ...); |
| void lto_init_eh (void); |
| hashval_t lto_input_scc (class lto_input_block *, class data_in *, |
| unsigned *, unsigned *, bool); |
| tree lto_input_tree_1 (class lto_input_block *, class data_in *, |
| enum LTO_tags, hashval_t hash); |
| tree lto_input_tree (class lto_input_block *, class data_in *); |
| tree stream_read_tree_ref (class lto_input_block *, class data_in *); |
| |
| |
| /* In lto-streamer-out.c */ |
| extern void lto_register_decl_definition (tree, struct lto_file_decl_data *); |
| extern struct output_block *create_output_block (enum lto_section_type); |
| extern void destroy_output_block (struct output_block *); |
| extern void lto_output_tree (struct output_block *, tree, bool, bool); |
| extern void stream_write_tree_ref (struct output_block *, tree); |
| extern void lto_output_var_decl_ref (struct lto_out_decl_state *, |
| struct lto_output_stream *, tree); |
| extern void lto_output_fn_decl_ref (struct lto_out_decl_state *, |
| struct lto_output_stream *, tree); |
| extern tree lto_input_var_decl_ref (lto_input_block *, lto_file_decl_data *); |
| extern tree lto_input_fn_decl_ref (lto_input_block *, lto_file_decl_data *); |
| extern void lto_output_toplevel_asms (void); |
| extern void produce_asm (struct output_block *ob, tree fn); |
| extern void lto_output (); |
| extern void produce_asm_for_decls (); |
| void lto_output_decl_state_streams (struct output_block *, |
| struct lto_out_decl_state *); |
| void lto_output_decl_state_refs (struct output_block *, |
| struct lto_output_stream *, |
| struct lto_out_decl_state *); |
| void lto_output_location (struct output_block *, struct bitpack_d *, |
| location_t); |
| void lto_output_location_and_block (struct output_block *, struct bitpack_d *, |
| location_t); |
| void lto_output_init_mode_table (void); |
| void lto_prepare_function_for_streaming (cgraph_node *); |
| |
| |
| /* In lto-cgraph.c */ |
| extern bool asm_nodes_output; |
| lto_symtab_encoder_t lto_symtab_encoder_new (bool); |
| int lto_symtab_encoder_encode (lto_symtab_encoder_t, symtab_node *); |
| void lto_symtab_encoder_delete (lto_symtab_encoder_t); |
| bool lto_symtab_encoder_delete_node (lto_symtab_encoder_t, symtab_node *); |
| bool lto_symtab_encoder_encode_body_p (lto_symtab_encoder_t, |
| struct cgraph_node *); |
| bool lto_symtab_encoder_in_partition_p (lto_symtab_encoder_t, |
| symtab_node *); |
| void lto_set_symtab_encoder_in_partition (lto_symtab_encoder_t, |
| symtab_node *); |
| |
| bool lto_symtab_encoder_encode_initializer_p (lto_symtab_encoder_t, |
| varpool_node *); |
| void output_symtab (void); |
| void input_symtab (void); |
| void output_offload_tables (void); |
| void input_offload_tables (bool); |
| bool referenced_from_other_partition_p (struct ipa_ref_list *, |
| lto_symtab_encoder_t); |
| bool reachable_from_other_partition_p (struct cgraph_node *, |
| lto_symtab_encoder_t); |
| bool referenced_from_this_partition_p (symtab_node *, |
| lto_symtab_encoder_t); |
| bool reachable_from_this_partition_p (struct cgraph_node *, |
| lto_symtab_encoder_t); |
| lto_symtab_encoder_t compute_ltrans_boundary (lto_symtab_encoder_t encoder); |
| void select_what_to_stream (void); |
| |
| /* In omp-general.c. */ |
| void omp_lto_output_declare_variant_alt (lto_simple_output_block *, |
| cgraph_node *, lto_symtab_encoder_t); |
| void omp_lto_input_declare_variant_alt (lto_input_block *, cgraph_node *, |
| vec<symtab_node *>); |
| |
| /* In options-save.c. */ |
| void cl_target_option_stream_out (struct output_block *, struct bitpack_d *, |
| struct cl_target_option *); |
| |
| void cl_target_option_stream_in (class data_in *, |
| struct bitpack_d *, |
| struct cl_target_option *); |
| |
| void cl_optimization_stream_out (struct output_block *, |
| struct bitpack_d *, struct cl_optimization *); |
| |
| void cl_optimization_stream_in (class data_in *, |
| struct bitpack_d *, struct cl_optimization *); |
| |
| |
| |
| /* In lto-opts.c. */ |
| extern void lto_write_options (void); |
| |
| |
| /* Statistics gathered during LTO, WPA and LTRANS. */ |
| extern struct lto_stats_d lto_stats; |
| |
| /* Section names corresponding to the values of enum lto_section_type. */ |
| extern const char *lto_section_name[]; |
| |
| /* Holds all the out decl states of functions output so far in the |
| current output file. */ |
| extern vec<lto_out_decl_state_ptr> lto_function_decl_states; |
| |
| /* Return true if LTO tag TAG corresponds to a tree code. */ |
| static inline bool |
| lto_tag_is_tree_code_p (enum LTO_tags tag) |
| { |
| return tag > LTO_first_tree_tag && (unsigned) tag <= MAX_TREE_CODES; |
| } |
| |
| |
| /* Return true if LTO tag TAG corresponds to a gimple code. */ |
| static inline bool |
| lto_tag_is_gimple_code_p (enum LTO_tags tag) |
| { |
| return (unsigned) tag >= LTO_first_gimple_tag |
| && (unsigned) tag |
| < LTO_first_gimple_tag + LAST_AND_UNUSED_GIMPLE_CODE; |
| } |
| |
| |
| /* Return the LTO tag corresponding to gimple code CODE. See enum |
| LTO_tags for details on the conversion. */ |
| static inline enum LTO_tags |
| lto_gimple_code_to_tag (enum gimple_code code) |
| { |
| return (enum LTO_tags) ((unsigned) code + LTO_first_gimple_tag); |
| } |
| |
| |
| /* Return the GIMPLE code corresponding to TAG. See enum LTO_tags for |
| details on the conversion. */ |
| static inline enum gimple_code |
| lto_tag_to_gimple_code (enum LTO_tags tag) |
| { |
| gcc_assert (lto_tag_is_gimple_code_p (tag)); |
| return (enum gimple_code) ((unsigned) tag - LTO_first_gimple_tag); |
| } |
| |
| |
| /* Return the LTO tag corresponding to tree code CODE. See enum |
| LTO_tags for details on the conversion. */ |
| static inline enum LTO_tags |
| lto_tree_code_to_tag (enum tree_code code) |
| { |
| return (enum LTO_tags) ((unsigned) code + LTO_first_tree_tag); |
| } |
| |
| |
| /* Return the tree code corresponding to TAG. See enum LTO_tags for |
| details on the conversion. */ |
| static inline enum tree_code |
| lto_tag_to_tree_code (enum LTO_tags tag) |
| { |
| gcc_assert (lto_tag_is_tree_code_p (tag)); |
| return (enum tree_code) ((unsigned) tag - LTO_first_tree_tag); |
| } |
| |
| /* Check that tag ACTUAL == EXPECTED. */ |
| static inline void |
| lto_tag_check (enum LTO_tags actual, enum LTO_tags expected) |
| { |
| if (actual != expected) |
| internal_error ("bytecode stream: expected tag %s instead of %s", |
| lto_tag_name (expected), lto_tag_name (actual)); |
| } |
| |
| /* Check that tag ACTUAL is in the range [TAG1, TAG2]. */ |
| static inline void |
| lto_tag_check_range (enum LTO_tags actual, enum LTO_tags tag1, |
| enum LTO_tags tag2) |
| { |
| if (actual < tag1 || actual > tag2) |
| internal_error ("bytecode stream: tag %s is not in the expected range " |
| "[%s, %s]", |
| lto_tag_name (actual), |
| lto_tag_name (tag1), |
| lto_tag_name (tag2)); |
| } |
| |
| /* Initialize an lto_out_decl_buffer ENCODER. */ |
| static inline void |
| lto_init_tree_ref_encoder (struct lto_tree_ref_encoder *encoder) |
| { |
| encoder->tree_hash_table = new hash_map<tree, unsigned> (251); |
| encoder->trees.create (0); |
| } |
| |
| |
| /* Destroy an lto_tree_ref_encoder ENCODER by freeing its contents. The |
| memory used by ENCODER is not freed by this function. */ |
| static inline void |
| lto_destroy_tree_ref_encoder (struct lto_tree_ref_encoder *encoder) |
| { |
| /* Hash table may be delete already. */ |
| delete encoder->tree_hash_table; |
| encoder->tree_hash_table = NULL; |
| encoder->trees.release (); |
| } |
| |
| /* Return the number of trees encoded in ENCODER. */ |
| static inline unsigned int |
| lto_tree_ref_encoder_size (struct lto_tree_ref_encoder *encoder) |
| { |
| return encoder->trees.length (); |
| } |
| |
| /* Return the IDX-th tree in ENCODER. */ |
| static inline tree |
| lto_tree_ref_encoder_get_tree (struct lto_tree_ref_encoder *encoder, |
| unsigned int idx) |
| { |
| return encoder->trees[idx]; |
| } |
| |
| /* Return number of encoded nodes in ENCODER. */ |
| static inline int |
| lto_symtab_encoder_size (lto_symtab_encoder_t encoder) |
| { |
| return encoder->nodes.length (); |
| } |
| |
| /* Value used to represent failure of lto_symtab_encoder_lookup. */ |
| #define LCC_NOT_FOUND (-1) |
| |
| /* Look up NODE in encoder. Return NODE's reference if it has been encoded |
| or LCC_NOT_FOUND if it is not there. */ |
| |
| static inline int |
| lto_symtab_encoder_lookup (lto_symtab_encoder_t encoder, |
| symtab_node *node) |
| { |
| size_t *slot = encoder->map->get (node); |
| return (slot && *slot ? *(slot) - 1 : LCC_NOT_FOUND); |
| } |
| |
| /* Return true if iterator LSE points to nothing. */ |
| static inline bool |
| lsei_end_p (lto_symtab_encoder_iterator lsei) |
| { |
| return lsei.index >= (unsigned)lto_symtab_encoder_size (lsei.encoder); |
| } |
| |
| /* Advance iterator LSE. */ |
| static inline void |
| lsei_next (lto_symtab_encoder_iterator *lsei) |
| { |
| lsei->index++; |
| } |
| |
| /* Return the node pointed to by LSI. */ |
| static inline symtab_node * |
| lsei_node (lto_symtab_encoder_iterator lsei) |
| { |
| return lsei.encoder->nodes[lsei.index].node; |
| } |
| |
| /* Return the node pointed to by LSI. */ |
| static inline struct cgraph_node * |
| lsei_cgraph_node (lto_symtab_encoder_iterator lsei) |
| { |
| return dyn_cast<cgraph_node *> (lsei.encoder->nodes[lsei.index].node); |
| } |
| |
| /* Return the node pointed to by LSI. */ |
| static inline varpool_node * |
| lsei_varpool_node (lto_symtab_encoder_iterator lsei) |
| { |
| return dyn_cast<varpool_node *> (lsei.encoder->nodes[lsei.index].node); |
| } |
| |
| /* Return the cgraph node corresponding to REF using ENCODER. */ |
| |
| static inline symtab_node * |
| lto_symtab_encoder_deref (lto_symtab_encoder_t encoder, int ref) |
| { |
| if (ref == LCC_NOT_FOUND) |
| return NULL; |
| |
| return encoder->nodes[ref].node; |
| } |
| |
| /* Return an iterator to the first node in LSI. */ |
| static inline lto_symtab_encoder_iterator |
| lsei_start (lto_symtab_encoder_t encoder) |
| { |
| lto_symtab_encoder_iterator lsei; |
| |
| lsei.encoder = encoder; |
| lsei.index = 0; |
| return lsei; |
| } |
| |
| /* Advance iterator LSE. */ |
| static inline void |
| lsei_next_in_partition (lto_symtab_encoder_iterator *lsei) |
| { |
| lsei_next (lsei); |
| while (!lsei_end_p (*lsei) |
| && !lto_symtab_encoder_in_partition_p (lsei->encoder, lsei_node (*lsei))) |
| lsei_next (lsei); |
| } |
| |
| /* Return an iterator to the first node in LSI. */ |
| static inline lto_symtab_encoder_iterator |
| lsei_start_in_partition (lto_symtab_encoder_t encoder) |
| { |
| lto_symtab_encoder_iterator lsei = lsei_start (encoder); |
| |
| if (lsei_end_p (lsei)) |
| return lsei; |
| if (!lto_symtab_encoder_in_partition_p (encoder, lsei_node (lsei))) |
| lsei_next_in_partition (&lsei); |
| |
| return lsei; |
| } |
| |
| /* Advance iterator LSE. */ |
| static inline void |
| lsei_next_function_in_partition (lto_symtab_encoder_iterator *lsei) |
| { |
| lsei_next (lsei); |
| while (!lsei_end_p (*lsei) |
| && (!is_a <cgraph_node *> (lsei_node (*lsei)) |
| || !lto_symtab_encoder_in_partition_p (lsei->encoder, lsei_node (*lsei)))) |
| lsei_next (lsei); |
| } |
| |
| /* Return an iterator to the first node in LSI. */ |
| static inline lto_symtab_encoder_iterator |
| lsei_start_function_in_partition (lto_symtab_encoder_t encoder) |
| { |
| lto_symtab_encoder_iterator lsei = lsei_start (encoder); |
| |
| if (lsei_end_p (lsei)) |
| return lsei; |
| if (!is_a <cgraph_node *> (lsei_node (lsei)) |
| || !lto_symtab_encoder_in_partition_p (encoder, lsei_node (lsei))) |
| lsei_next_function_in_partition (&lsei); |
| |
| return lsei; |
| } |
| |
| /* Advance iterator LSE. */ |
| static inline void |
| lsei_next_variable_in_partition (lto_symtab_encoder_iterator *lsei) |
| { |
| lsei_next (lsei); |
| while (!lsei_end_p (*lsei) |
| && (!is_a <varpool_node *> (lsei_node (*lsei)) |
| || !lto_symtab_encoder_in_partition_p (lsei->encoder, lsei_node (*lsei)))) |
| lsei_next (lsei); |
| } |
| |
| /* Return an iterator to the first node in LSI. */ |
| static inline lto_symtab_encoder_iterator |
| lsei_start_variable_in_partition (lto_symtab_encoder_t encoder) |
| { |
| lto_symtab_encoder_iterator lsei = lsei_start (encoder); |
| |
| if (lsei_end_p (lsei)) |
| return lsei; |
| if (!is_a <varpool_node *> (lsei_node (lsei)) |
| || !lto_symtab_encoder_in_partition_p (encoder, lsei_node (lsei))) |
| lsei_next_variable_in_partition (&lsei); |
| |
| return lsei; |
| } |
| |
| /* Entry for the delayed registering of decl -> DIE references. */ |
| struct dref_entry { |
| tree decl; |
| const char *sym; |
| unsigned HOST_WIDE_INT off; |
| }; |
| |
| extern vec<dref_entry> dref_queue; |
| |
| extern FILE *streamer_dump_file; |
| |
| #endif /* GCC_LTO_STREAMER_H */ |