| /* Callgraph handling code. |
| Copyright (C) 2003-2020 Free Software Foundation, Inc. |
| Contributed by Jan Hubicka |
| |
| 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_CGRAPH_H |
| #define GCC_CGRAPH_H |
| |
| #include "profile-count.h" |
| #include "ipa-ref.h" |
| #include "plugin-api.h" |
| #include "ipa-param-manipulation.h" |
| |
| extern void debuginfo_early_init (void); |
| extern void debuginfo_init (void); |
| extern void debuginfo_fini (void); |
| extern void debuginfo_start (void); |
| extern void debuginfo_stop (void); |
| extern void debuginfo_early_start (void); |
| extern void debuginfo_early_stop (void); |
| |
| class ipa_opt_pass_d; |
| typedef ipa_opt_pass_d *ipa_opt_pass; |
| |
| /* Symbol table consists of functions and variables. |
| TODO: add labels and CONST_DECLs. */ |
| enum symtab_type |
| { |
| SYMTAB_SYMBOL, |
| SYMTAB_FUNCTION, |
| SYMTAB_VARIABLE |
| }; |
| |
| /* Section names are stored as reference counted strings in GGC safe hashtable |
| (to make them survive through PCH). */ |
| |
| struct GTY((for_user)) section_hash_entry |
| { |
| int ref_count; |
| char *name; /* As long as this datastructure stays in GGC, we cannot put |
| string at the tail of structure of GGC dies in horrible |
| way */ |
| }; |
| |
| struct section_name_hasher : ggc_ptr_hash<section_hash_entry> |
| { |
| typedef const char *compare_type; |
| |
| static hashval_t hash (section_hash_entry *); |
| static bool equal (section_hash_entry *, const char *); |
| }; |
| |
| enum availability |
| { |
| /* Not yet set by cgraph_function_body_availability. */ |
| AVAIL_UNSET, |
| /* Function body/variable initializer is unknown. */ |
| AVAIL_NOT_AVAILABLE, |
| /* Function body/variable initializer is known but might be replaced |
| by a different one from other compilation unit and thus needs to |
| be dealt with a care. Like AVAIL_NOT_AVAILABLE it can have |
| arbitrary side effects on escaping variables and functions, while |
| like AVAILABLE it might access static variables. */ |
| AVAIL_INTERPOSABLE, |
| /* Function body/variable initializer is known and will be used in final |
| program. */ |
| AVAIL_AVAILABLE, |
| /* Function body/variable initializer is known and all it's uses are |
| explicitly visible within current unit (i.e. it's address is never taken |
| and it is not exported to other units). Currently used only for |
| functions. */ |
| AVAIL_LOCAL |
| }; |
| |
| /* Classification of symbols WRT partitioning. */ |
| enum symbol_partitioning_class |
| { |
| /* External declarations are ignored by partitioning algorithms and they are |
| added into the boundary later via compute_ltrans_boundary. */ |
| SYMBOL_EXTERNAL, |
| /* Partitioned symbols are put into one of partitions. */ |
| SYMBOL_PARTITION, |
| /* Duplicated symbols (such as comdat or constant pool references) are |
| copied into every node needing them via add_symbol_to_partition. */ |
| SYMBOL_DUPLICATE |
| }; |
| |
| /* Base of all entries in the symbol table. |
| The symtab_node is inherited by cgraph and varpol nodes. */ |
| struct GTY((desc ("%h.type"), tag ("SYMTAB_SYMBOL"), |
| chain_next ("%h.next"), chain_prev ("%h.previous"))) |
| symtab_node |
| { |
| public: |
| friend class symbol_table; |
| |
| /* Constructor. */ |
| explicit symtab_node (symtab_type t) |
| : type (t), resolution (LDPR_UNKNOWN), definition (false), alias (false), |
| transparent_alias (false), weakref (false), cpp_implicit_alias (false), |
| symver (false), analyzed (false), writeonly (false), |
| refuse_visibility_changes (false), externally_visible (false), |
| no_reorder (false), force_output (false), forced_by_abi (false), |
| unique_name (false), implicit_section (false), body_removed (false), |
| used_from_other_partition (false), in_other_partition (false), |
| address_taken (false), in_init_priority_hash (false), |
| need_lto_streaming (false), offloadable (false), ifunc_resolver (false), |
| order (false), next_sharing_asm_name (NULL), |
| previous_sharing_asm_name (NULL), same_comdat_group (NULL), ref_list (), |
| alias_target (NULL), lto_file_data (NULL), aux (NULL), |
| x_comdat_group (NULL_TREE), x_section (NULL) |
| {} |
| |
| /* Return name. */ |
| const char *name () const; |
| |
| /* Return dump name. */ |
| const char *dump_name () const; |
| |
| /* Return asm name. */ |
| const char *asm_name () const; |
| |
| /* Return dump name with assembler name. */ |
| const char *dump_asm_name () const; |
| |
| /* Return visibility name. */ |
| const char *get_visibility_string () const; |
| |
| /* Return type_name name. */ |
| const char *get_symtab_type_string () const; |
| |
| /* Add node into symbol table. This function is not used directly, but via |
| cgraph/varpool node creation routines. */ |
| void register_symbol (void); |
| |
| /* Remove symbol from symbol table. */ |
| void remove (void); |
| |
| /* Dump symtab node to F. */ |
| void dump (FILE *f); |
| |
| /* Dump symtab callgraph in graphviz format. */ |
| void dump_graphviz (FILE *f); |
| |
| /* Dump symtab node to stderr. */ |
| void DEBUG_FUNCTION debug (void); |
| |
| /* Verify consistency of node. */ |
| void DEBUG_FUNCTION verify (void); |
| |
| /* Return ipa reference from this symtab_node to |
| REFERRED_NODE or REFERRED_VARPOOL_NODE. USE_TYPE specify type |
| of the use and STMT the statement (if it exists). */ |
| ipa_ref *create_reference (symtab_node *referred_node, |
| enum ipa_ref_use use_type); |
| |
| /* Return ipa reference from this symtab_node to |
| REFERRED_NODE or REFERRED_VARPOOL_NODE. USE_TYPE specify type |
| of the use and STMT the statement (if it exists). */ |
| ipa_ref *create_reference (symtab_node *referred_node, |
| enum ipa_ref_use use_type, gimple *stmt); |
| |
| /* If VAL is a reference to a function or a variable, add a reference from |
| this symtab_node to the corresponding symbol table node. Return the new |
| reference or NULL if none was created. */ |
| ipa_ref *maybe_create_reference (tree val, gimple *stmt); |
| |
| /* Clone all references from symtab NODE to this symtab_node. */ |
| void clone_references (symtab_node *node); |
| |
| /* Remove all stmt references in non-speculative references. |
| Those are not maintained during inlining & clonning. |
| The exception are speculative references that are updated along |
| with callgraph edges associated with them. */ |
| void clone_referring (symtab_node *node); |
| |
| /* Clone reference REF to this symtab_node and set its stmt to STMT. */ |
| ipa_ref *clone_reference (ipa_ref *ref, gimple *stmt); |
| |
| /* Find the structure describing a reference to REFERRED_NODE |
| and associated with statement STMT. */ |
| ipa_ref *find_reference (symtab_node *referred_node, gimple *stmt, |
| unsigned int lto_stmt_uid); |
| |
| /* Remove all references that are associated with statement STMT. */ |
| void remove_stmt_references (gimple *stmt); |
| |
| /* Remove all stmt references in non-speculative references. |
| Those are not maintained during inlining & clonning. |
| The exception are speculative references that are updated along |
| with callgraph edges associated with them. */ |
| void clear_stmts_in_references (void); |
| |
| /* Remove all references in ref list. */ |
| void remove_all_references (void); |
| |
| /* Remove all referring items in ref list. */ |
| void remove_all_referring (void); |
| |
| /* Dump references in ref list to FILE. */ |
| void dump_references (FILE *file); |
| |
| /* Dump referring in list to FILE. */ |
| void dump_referring (FILE *); |
| |
| /* Get number of references for this node. */ |
| inline unsigned num_references (void) |
| { |
| return ref_list.references ? ref_list.references->length () : 0; |
| } |
| |
| /* Iterates I-th reference in the list, REF is also set. */ |
| ipa_ref *iterate_reference (unsigned i, ipa_ref *&ref); |
| |
| /* Iterates I-th referring item in the list, REF is also set. */ |
| ipa_ref *iterate_referring (unsigned i, ipa_ref *&ref); |
| |
| /* Iterates I-th referring alias item in the list, REF is also set. */ |
| ipa_ref *iterate_direct_aliases (unsigned i, ipa_ref *&ref); |
| |
| /* Return true if symtab node and TARGET represents |
| semantically equivalent symbols. */ |
| bool semantically_equivalent_p (symtab_node *target); |
| |
| /* Classify symbol symtab node for partitioning. */ |
| enum symbol_partitioning_class get_partitioning_class (void); |
| |
| /* Return comdat group. */ |
| tree get_comdat_group () |
| { |
| return x_comdat_group; |
| } |
| |
| /* Return comdat group as identifier_node. */ |
| tree get_comdat_group_id () |
| { |
| if (x_comdat_group && TREE_CODE (x_comdat_group) != IDENTIFIER_NODE) |
| x_comdat_group = DECL_ASSEMBLER_NAME (x_comdat_group); |
| return x_comdat_group; |
| } |
| |
| /* Set comdat group. */ |
| void set_comdat_group (tree group) |
| { |
| gcc_checking_assert (!group || TREE_CODE (group) == IDENTIFIER_NODE |
| || DECL_P (group)); |
| x_comdat_group = group; |
| } |
| |
| /* Return section as string. */ |
| const char * get_section () |
| { |
| if (!x_section) |
| return NULL; |
| return x_section->name; |
| } |
| |
| /* Remove node from same comdat group. */ |
| void remove_from_same_comdat_group (void); |
| |
| /* Add this symtab_node to the same comdat group that OLD is in. */ |
| void add_to_same_comdat_group (symtab_node *old_node); |
| |
| /* Dissolve the same_comdat_group list in which NODE resides. */ |
| void dissolve_same_comdat_group_list (void); |
| |
| /* Return true when symtab_node is known to be used from other (non-LTO) |
| object file. Known only when doing LTO via linker plugin. */ |
| bool used_from_object_file_p (void); |
| |
| /* Walk the alias chain to return the symbol NODE is alias of. |
| If NODE is not an alias, return NODE. |
| When AVAILABILITY is non-NULL, get minimal availability in the chain. |
| When REF is non-NULL, assume that reference happens in symbol REF |
| when determining the availability. */ |
| symtab_node *ultimate_alias_target (enum availability *avail = NULL, |
| struct symtab_node *ref = NULL); |
| |
| /* Return next reachable static symbol with initializer after NODE. */ |
| inline symtab_node *next_defined_symbol (void); |
| |
| /* Add reference recording that symtab node is alias of TARGET. |
| If TRANSPARENT is true make the alias to be transparent alias. |
| The function can fail in the case of aliasing cycles; in this case |
| it returns false. */ |
| bool resolve_alias (symtab_node *target, bool transparent = false); |
| |
| /* C++ FE sometimes change linkage flags after producing same |
| body aliases. */ |
| void fixup_same_cpp_alias_visibility (symtab_node *target); |
| |
| /* Call callback on symtab node and aliases associated to this node. |
| When INCLUDE_OVERWRITABLE is false, overwritable aliases and thunks are |
| skipped. */ |
| bool call_for_symbol_and_aliases (bool (*callback) (symtab_node *, void *), |
| void *data, |
| bool include_overwrite); |
| |
| /* If node cannot be interposable by static or dynamic linker to point to |
| different definition, return this symbol. Otherwise look for alias with |
| such property and if none exists, introduce new one. */ |
| symtab_node *noninterposable_alias (void); |
| |
| /* Return node that alias is aliasing. */ |
| inline symtab_node *get_alias_target (void); |
| |
| /* Return DECL that alias is aliasing. */ |
| inline tree get_alias_target_tree (); |
| |
| /* Set section for symbol and its aliases. */ |
| void set_section (const char *section); |
| |
| /* Set section, do not recurse into aliases. |
| When one wants to change section of symbol and its aliases, |
| use set_section. */ |
| void set_section_for_node (const char *section); |
| |
| /* Set initialization priority to PRIORITY. */ |
| void set_init_priority (priority_type priority); |
| |
| /* Return the initialization priority. */ |
| priority_type get_init_priority (); |
| |
| /* Return availability of NODE when referenced from REF. */ |
| enum availability get_availability (symtab_node *ref = NULL); |
| |
| /* During LTO stream-in this predicate can be used to check whether node |
| in question prevails in the linking to save some memory usage. */ |
| bool prevailing_p (void); |
| |
| /* Return true if NODE binds to current definition in final executable |
| when referenced from REF. If REF is NULL return conservative value |
| for any reference. */ |
| bool binds_to_current_def_p (symtab_node *ref = NULL); |
| |
| /* Make DECL local. */ |
| void make_decl_local (void); |
| |
| /* Copy visibility from N. */ |
| void copy_visibility_from (symtab_node *n); |
| |
| /* Return desired alignment of the definition. This is NOT alignment useful |
| to access THIS, because THIS may be interposable and DECL_ALIGN should |
| be used instead. It however must be guaranteed when output definition |
| of THIS. */ |
| unsigned int definition_alignment (); |
| |
| /* Return true if alignment can be increased. */ |
| bool can_increase_alignment_p (); |
| |
| /* Increase alignment of symbol to ALIGN. */ |
| void increase_alignment (unsigned int align); |
| |
| /* Return true if list contains an alias. */ |
| bool has_aliases_p (void); |
| |
| /* Return true when the symbol is real symbol, i.e. it is not inline clone |
| or abstract function kept for debug info purposes only. */ |
| bool real_symbol_p (void); |
| |
| /* Return true when the symbol needs to be output to the LTO symbol table. */ |
| bool output_to_lto_symbol_table_p (void); |
| |
| /* Determine if symbol declaration is needed. That is, visible to something |
| either outside this translation unit, something magic in the system |
| configury. This function is used just during symbol creation. */ |
| bool needed_p (void); |
| |
| /* Return true if this symbol is a function from the C frontend specified |
| directly in RTL form (with "__RTL"). */ |
| bool native_rtl_p () const; |
| |
| /* Return true when there are references to the node. */ |
| bool referred_to_p (bool include_self = true); |
| |
| /* Return true if symbol can be discarded by linker from the binary. |
| Assume that symbol is used (so there is no need to take into account |
| garbage collecting linkers) |
| |
| This can happen for comdats, commons and weaks when they are prevailed |
| by other definition at static linking time. */ |
| inline bool |
| can_be_discarded_p (void) |
| { |
| return (DECL_EXTERNAL (decl) |
| || ((get_comdat_group () |
| || DECL_COMMON (decl) |
| || (DECL_SECTION_NAME (decl) && DECL_WEAK (decl))) |
| && ((resolution != LDPR_PREVAILING_DEF |
| && resolution != LDPR_PREVAILING_DEF_IRONLY_EXP) |
| || flag_incremental_link) |
| && resolution != LDPR_PREVAILING_DEF_IRONLY)); |
| } |
| |
| /* Return true if NODE is local to a particular COMDAT group, and must not |
| be named from outside the COMDAT. This is used for C++ decloned |
| constructors. */ |
| inline bool comdat_local_p (void) |
| { |
| return (same_comdat_group && !TREE_PUBLIC (decl)); |
| } |
| |
| /* Return true if ONE and TWO are part of the same COMDAT group. */ |
| inline bool in_same_comdat_group_p (symtab_node *target); |
| |
| /* Return true if symbol is known to be nonzero. */ |
| bool nonzero_address (); |
| |
| /* Return 0 if symbol is known to have different address than S2, |
| Return 1 if symbol is known to have same address as S2, |
| return 2 otherwise. |
| |
| If MEMORY_ACCESSED is true, assume that both memory pointer to THIS |
| and S2 is going to be accessed. This eliminates the situations when |
| either THIS or S2 is NULL and is useful for comparing bases when deciding |
| about memory aliasing. */ |
| int equal_address_to (symtab_node *s2, bool memory_accessed = false); |
| |
| /* Return true if symbol's address may possibly be compared to other |
| symbol's address. */ |
| bool address_matters_p (); |
| |
| /* Return true if NODE's address can be compared. This use properties |
| of NODE only and does not look if the address is actually taken in |
| interesting way. For that use ADDRESS_MATTERS_P instead. */ |
| bool address_can_be_compared_p (void); |
| |
| /* Return symbol table node associated with DECL, if any, |
| and NULL otherwise. */ |
| static inline symtab_node *get (const_tree decl) |
| { |
| /* Check that we are called for sane type of object - functions |
| and static or external variables. */ |
| gcc_checking_assert (TREE_CODE (decl) == FUNCTION_DECL |
| || (TREE_CODE (decl) == VAR_DECL |
| && (TREE_STATIC (decl) || DECL_EXTERNAL (decl) |
| || in_lto_p))); |
| /* Check that the mapping is sane - perhaps this check can go away, |
| but at the moment frontends tends to corrupt the mapping by calling |
| memcpy/memset on the tree nodes. */ |
| gcc_checking_assert (!decl->decl_with_vis.symtab_node |
| || decl->decl_with_vis.symtab_node->decl == decl); |
| return decl->decl_with_vis.symtab_node; |
| } |
| |
| /* Try to find a symtab node for declaration DECL and if it does not |
| exist or if it corresponds to an inline clone, create a new one. */ |
| static inline symtab_node * get_create (tree node); |
| |
| /* Return the cgraph node that has ASMNAME for its DECL_ASSEMBLER_NAME. |
| Return NULL if there's no such node. */ |
| static symtab_node *get_for_asmname (const_tree asmname); |
| |
| /* Verify symbol table for internal consistency. */ |
| static DEBUG_FUNCTION void verify_symtab_nodes (void); |
| |
| /* Perform internal consistency checks, if they are enabled. */ |
| static inline void checking_verify_symtab_nodes (void); |
| |
| /* Type of the symbol. */ |
| ENUM_BITFIELD (symtab_type) type : 8; |
| |
| /* The symbols resolution. */ |
| ENUM_BITFIELD (ld_plugin_symbol_resolution) resolution : 8; |
| |
| /*** Flags representing the symbol type. ***/ |
| |
| /* True when symbol corresponds to a definition in current unit. |
| set via finalize_function or finalize_decl */ |
| unsigned definition : 1; |
| /* True when symbol is an alias. |
| Set by assemble_alias. */ |
| unsigned alias : 1; |
| /* When true the alias is translated into its target symbol either by GCC |
| or assembler (it also may just be a duplicate declaration of the same |
| linker name). |
| |
| Currently transparent aliases come in three different flavors |
| - aliases having the same assembler name as their target (aka duplicated |
| declarations). In this case the assembler names compare via |
| assembler_names_equal_p and weakref is false |
| - aliases that are renamed at a time being output to final file |
| by varasm.c. For those DECL_ASSEMBLER_NAME have |
| IDENTIFIER_TRANSPARENT_ALIAS set and thus also their assembler |
| name must be unique. |
| Weakrefs belong to this category when we target assembler without |
| .weakref directive. |
| - weakrefs that are renamed by assembler via .weakref directive. |
| In this case the alias may or may not be definition (depending if |
| target declaration was seen by the compiler), weakref is set. |
| Unless we are before renaming statics, assembler names are different. |
| |
| Given that we now support duplicate declarations, the second option is |
| redundant and will be removed. */ |
| unsigned transparent_alias : 1; |
| /* True when alias is a weakref. */ |
| unsigned weakref : 1; |
| /* C++ frontend produce same body aliases and extra name aliases for |
| virtual functions and vtables that are obviously equivalent. |
| Those aliases are bit special, especially because C++ frontend |
| visibility code is so ugly it cannot get them right at first time |
| and their visibility needs to be copied from their "masters" at |
| the end of parsing. */ |
| unsigned cpp_implicit_alias : 1; |
| /* The alias is a symbol version. */ |
| unsigned symver : 1; |
| /* Set once the definition was analyzed. The list of references and |
| other properties are built during analysis. */ |
| unsigned analyzed : 1; |
| /* Set for write-only variables. */ |
| unsigned writeonly : 1; |
| /* Visibility of symbol was used for further optimization; do not |
| permit further changes. */ |
| unsigned refuse_visibility_changes : 1; |
| |
| /*** Visibility and linkage flags. ***/ |
| |
| /* Set when function is visible by other units. */ |
| unsigned externally_visible : 1; |
| /* Don't reorder to other symbols having this set. */ |
| unsigned no_reorder : 1; |
| /* The symbol will be assumed to be used in an invisible way (like |
| by an toplevel asm statement). */ |
| unsigned force_output : 1; |
| /* Like FORCE_OUTPUT, but in the case it is ABI requiring the symbol to be |
| exported. Unlike FORCE_OUTPUT this flag gets cleared to symbols promoted |
| to static and it does not inhibit optimization. */ |
| unsigned forced_by_abi : 1; |
| /* True when the name is known to be unique and thus it does not need mangling. */ |
| unsigned unique_name : 1; |
| /* Specify whether the section was set by user or by |
| compiler via -ffunction-sections. */ |
| unsigned implicit_section : 1; |
| /* True when body and other characteristics have been removed by |
| symtab_remove_unreachable_nodes. */ |
| unsigned body_removed : 1; |
| |
| /*** WHOPR Partitioning flags. |
| These flags are used at ltrans stage when only part of the callgraph is |
| available. ***/ |
| |
| /* Set when variable is used from other LTRANS partition. */ |
| unsigned used_from_other_partition : 1; |
| /* Set when function is available in the other LTRANS partition. |
| During WPA output it is used to mark nodes that are present in |
| multiple partitions. */ |
| unsigned in_other_partition : 1; |
| |
| |
| |
| /*** other flags. ***/ |
| |
| /* Set when symbol has address taken. */ |
| unsigned address_taken : 1; |
| /* Set when init priority is set. */ |
| unsigned in_init_priority_hash : 1; |
| |
| /* Set when symbol needs to be streamed into LTO bytecode for LTO, or in case |
| of offloading, for separate compilation for a different target. */ |
| unsigned need_lto_streaming : 1; |
| |
| /* Set when symbol can be streamed into bytecode for offloading. */ |
| unsigned offloadable : 1; |
| |
| /* Set when symbol is an IFUNC resolver. */ |
| unsigned ifunc_resolver : 1; |
| |
| |
| /* Ordering of all symtab entries. */ |
| int order; |
| |
| /* Declaration representing the symbol. */ |
| tree decl; |
| |
| /* Linked list of symbol table entries starting with symtab_nodes. */ |
| symtab_node *next; |
| symtab_node *previous; |
| |
| /* Linked list of symbols with the same asm name. There may be multiple |
| entries for single symbol name during LTO, because symbols are renamed |
| only after partitioning. |
| |
| Because inline clones are kept in the assembler name has, they also produce |
| duplicate entries. |
| |
| There are also several long standing bugs where frontends and builtin |
| code produce duplicated decls. */ |
| symtab_node *next_sharing_asm_name; |
| symtab_node *previous_sharing_asm_name; |
| |
| /* Circular list of nodes in the same comdat group if non-NULL. */ |
| symtab_node *same_comdat_group; |
| |
| /* Vectors of referring and referenced entities. */ |
| ipa_ref_list ref_list; |
| |
| /* Alias target. May be either DECL pointer or ASSEMBLER_NAME pointer |
| depending to what was known to frontend on the creation time. |
| Once alias is resolved, this pointer become NULL. */ |
| tree alias_target; |
| |
| /* File stream where this node is being written to. */ |
| struct lto_file_decl_data * lto_file_data; |
| |
| PTR GTY ((skip)) aux; |
| |
| /* Comdat group the symbol is in. Can be private if GGC allowed that. */ |
| tree x_comdat_group; |
| |
| /* Section name. Again can be private, if allowed. */ |
| section_hash_entry *x_section; |
| |
| protected: |
| /* Dump base fields of symtab nodes to F. Not to be used directly. */ |
| void dump_base (FILE *); |
| |
| /* Verify common part of symtab node. */ |
| bool DEBUG_FUNCTION verify_base (void); |
| |
| /* Remove node from symbol table. This function is not used directly, but via |
| cgraph/varpool node removal routines. */ |
| void unregister (void); |
| |
| /* Return the initialization and finalization priority information for |
| DECL. If there is no previous priority information, a freshly |
| allocated structure is returned. */ |
| struct symbol_priority_map *priority_info (void); |
| |
| /* Worker for call_for_symbol_and_aliases_1. */ |
| bool call_for_symbol_and_aliases_1 (bool (*callback) (symtab_node *, void *), |
| void *data, |
| bool include_overwrite); |
| private: |
| /* Worker for set_section. */ |
| static bool set_section (symtab_node *n, void *s); |
| |
| /* Worker for symtab_resolve_alias. */ |
| static bool set_implicit_section (symtab_node *n, void *); |
| |
| /* Worker searching noninterposable alias. */ |
| static bool noninterposable_alias (symtab_node *node, void *data); |
| |
| /* Worker for ultimate_alias_target. */ |
| symtab_node *ultimate_alias_target_1 (enum availability *avail = NULL, |
| symtab_node *ref = NULL); |
| |
| /* Get dump name with normal or assembly name. */ |
| const char *get_dump_name (bool asm_name_p) const; |
| }; |
| |
| inline void |
| symtab_node::checking_verify_symtab_nodes (void) |
| { |
| if (flag_checking) |
| symtab_node::verify_symtab_nodes (); |
| } |
| |
| /* Walk all aliases for NODE. */ |
| #define FOR_EACH_ALIAS(NODE, ALIAS) \ |
| for (unsigned ALIAS##_iter_ = 0; \ |
| (NODE)->iterate_direct_aliases (ALIAS##_iter_, ALIAS); \ |
| ALIAS##_iter_++) |
| |
| /* This is the information that is put into the cgraph local structure |
| to recover a function. */ |
| struct lto_file_decl_data; |
| |
| extern const char * const cgraph_availability_names[]; |
| extern const char * const ld_plugin_symbol_resolution_names[]; |
| extern const char * const tls_model_names[]; |
| |
| /* Sub-structure of cgraph_node. Holds information about thunk, used only for |
| same body aliases. |
| |
| Thunks are basically wrappers around methods which are introduced in case |
| of multiple inheritance in order to adjust the value of the "this" pointer |
| or of the returned value. |
| |
| In the case of this-adjusting thunks, each back-end can override the |
| can_output_mi_thunk/output_mi_thunk target hooks to generate a minimal thunk |
| (with a tail call for instance) directly as assembly. For the default hook |
| or for the case where the can_output_mi_thunk hooks return false, the thunk |
| is gimplified and lowered using the regular machinery. */ |
| |
| struct GTY(()) cgraph_thunk_info { |
| /* Offset used to adjust "this". */ |
| HOST_WIDE_INT fixed_offset; |
| |
| /* Offset in the virtual table to get the offset to adjust "this". Valid iff |
| VIRTUAL_OFFSET_P is true. */ |
| HOST_WIDE_INT virtual_value; |
| |
| /* Offset from "this" to get the offset to adjust "this". Zero means: this |
| offset is to be ignored. */ |
| HOST_WIDE_INT indirect_offset; |
| |
| /* Thunk target, i.e. the method that this thunk wraps. Depending on the |
| TARGET_USE_LOCAL_THUNK_ALIAS_P macro, this may have to be a new alias. */ |
| tree alias; |
| |
| /* Nonzero for a "this" adjusting thunk and zero for a result adjusting |
| thunk. */ |
| bool this_adjusting; |
| |
| /* If true, this thunk is what we call a virtual thunk. In this case: |
| * for this-adjusting thunks, after the FIXED_OFFSET based adjustment is |
| done, add to the result the offset found in the vtable at: |
| vptr + VIRTUAL_VALUE |
| * for result-adjusting thunks, the FIXED_OFFSET adjustment is done after |
| the virtual one. */ |
| bool virtual_offset_p; |
| |
| /* Set to true when alias node (the cgraph_node to which this struct belong) |
| is a thunk. Access to any other fields is invalid if this is false. */ |
| bool thunk_p; |
| }; |
| |
| /* Represent which DECL tree (or reference to such tree) |
| will be replaced by another tree while versioning. */ |
| struct GTY(()) ipa_replace_map |
| { |
| /* The new (replacing) tree. */ |
| tree new_tree; |
| /* Parameter number to replace, when old_tree is NULL. */ |
| int parm_num; |
| }; |
| |
| struct GTY(()) cgraph_clone_info |
| { |
| /* Constants discovered by IPA-CP, i.e. which parameter should be replaced |
| with what. */ |
| vec<ipa_replace_map *, va_gc> *tree_map; |
| /* Parameter modification that IPA-SRA decided to perform. */ |
| ipa_param_adjustments *param_adjustments; |
| /* Lists of dummy-decl and offset pairs representing split formal parameters |
| in the caller. Offsets of all new replacements are enumerated, those |
| coming from the same original parameter have the same dummy decl stored |
| along with them. |
| |
| Dummy decls sit in call statement arguments followed by new parameter |
| decls (or their SSA names) in between (caller) clone materialization and |
| call redirection. Redirection then recognizes the dummy variable and |
| together with the stored offsets can reconstruct what exactly the new |
| parameter decls represent and can leave in place only those that the |
| callee expects. */ |
| vec<ipa_param_performed_split, va_gc> *performed_splits; |
| }; |
| |
| enum cgraph_simd_clone_arg_type |
| { |
| SIMD_CLONE_ARG_TYPE_VECTOR, |
| SIMD_CLONE_ARG_TYPE_UNIFORM, |
| /* These are only for integer/pointer arguments passed by value. */ |
| SIMD_CLONE_ARG_TYPE_LINEAR_CONSTANT_STEP, |
| SIMD_CLONE_ARG_TYPE_LINEAR_VARIABLE_STEP, |
| /* These 6 are only for reference type arguments or arguments passed |
| by reference. */ |
| SIMD_CLONE_ARG_TYPE_LINEAR_REF_CONSTANT_STEP, |
| SIMD_CLONE_ARG_TYPE_LINEAR_REF_VARIABLE_STEP, |
| SIMD_CLONE_ARG_TYPE_LINEAR_UVAL_CONSTANT_STEP, |
| SIMD_CLONE_ARG_TYPE_LINEAR_UVAL_VARIABLE_STEP, |
| SIMD_CLONE_ARG_TYPE_LINEAR_VAL_CONSTANT_STEP, |
| SIMD_CLONE_ARG_TYPE_LINEAR_VAL_VARIABLE_STEP, |
| SIMD_CLONE_ARG_TYPE_MASK |
| }; |
| |
| /* Function arguments in the original function of a SIMD clone. |
| Supplementary data for `struct simd_clone'. */ |
| |
| struct GTY(()) cgraph_simd_clone_arg { |
| /* Original function argument as it originally existed in |
| DECL_ARGUMENTS. */ |
| tree orig_arg; |
| |
| /* orig_arg's function (or for extern functions type from |
| TYPE_ARG_TYPES). */ |
| tree orig_type; |
| |
| /* If argument is a vector, this holds the vector version of |
| orig_arg that after adjusting the argument types will live in |
| DECL_ARGUMENTS. Otherwise, this is NULL. |
| |
| This basically holds: |
| vector(simdlen) __typeof__(orig_arg) new_arg. */ |
| tree vector_arg; |
| |
| /* vector_arg's type (or for extern functions new vector type. */ |
| tree vector_type; |
| |
| /* If argument is a vector, this holds the array where the simd |
| argument is held while executing the simd clone function. This |
| is a local variable in the cloned function. Its content is |
| copied from vector_arg upon entry to the clone. |
| |
| This basically holds: |
| __typeof__(orig_arg) simd_array[simdlen]. */ |
| tree simd_array; |
| |
| /* A SIMD clone's argument can be either linear (constant or |
| variable), uniform, or vector. */ |
| enum cgraph_simd_clone_arg_type arg_type; |
| |
| /* For arg_type SIMD_CLONE_ARG_TYPE_LINEAR_*CONSTANT_STEP this is |
| the constant linear step, if arg_type is |
| SIMD_CLONE_ARG_TYPE_LINEAR_*VARIABLE_STEP, this is index of |
| the uniform argument holding the step, otherwise 0. */ |
| HOST_WIDE_INT linear_step; |
| |
| /* Variable alignment if available, otherwise 0. */ |
| unsigned int alignment; |
| }; |
| |
| /* Specific data for a SIMD function clone. */ |
| |
| struct GTY(()) cgraph_simd_clone { |
| /* Number of words in the SIMD lane associated with this clone. */ |
| unsigned int simdlen; |
| |
| /* Number of annotated function arguments in `args'. This is |
| usually the number of named arguments in FNDECL. */ |
| unsigned int nargs; |
| |
| /* Max hardware vector size in bits for integral vectors. */ |
| unsigned int vecsize_int; |
| |
| /* Max hardware vector size in bits for floating point vectors. */ |
| unsigned int vecsize_float; |
| |
| /* Machine mode of the mask argument(s), if they are to be passed |
| as bitmasks in integer argument(s). VOIDmode if masks are passed |
| as vectors of characteristic type. */ |
| machine_mode mask_mode; |
| |
| /* The mangling character for a given vector size. This is used |
| to determine the ISA mangling bit as specified in the Intel |
| Vector ABI. */ |
| unsigned char vecsize_mangle; |
| |
| /* True if this is the masked, in-branch version of the clone, |
| otherwise false. */ |
| unsigned int inbranch : 1; |
| |
| /* Doubly linked list of SIMD clones. */ |
| cgraph_node *prev_clone, *next_clone; |
| |
| /* Original cgraph node the SIMD clones were created for. */ |
| cgraph_node *origin; |
| |
| /* Annotated function arguments for the original function. */ |
| cgraph_simd_clone_arg GTY((length ("%h.nargs"))) args[1]; |
| }; |
| |
| /* Function Multiversioning info. */ |
| struct GTY((for_user)) cgraph_function_version_info { |
| /* The cgraph_node for which the function version info is stored. */ |
| cgraph_node *this_node; |
| /* Chains all the semantically identical function versions. The |
| first function in this chain is the version_info node of the |
| default function. */ |
| cgraph_function_version_info *prev; |
| /* If this version node corresponds to a dispatcher for function |
| versions, this points to the version info node of the default |
| function, the first node in the chain. */ |
| cgraph_function_version_info *next; |
| /* If this node corresponds to a function version, this points |
| to the dispatcher function decl, which is the function that must |
| be called to execute the right function version at run-time. |
| |
| If this cgraph node is a dispatcher (if dispatcher_function is |
| true, in the cgraph_node struct) for function versions, this |
| points to resolver function, which holds the function body of the |
| dispatcher. The dispatcher decl is an alias to the resolver |
| function decl. */ |
| tree dispatcher_resolver; |
| }; |
| |
| #define DEFCIFCODE(code, type, string) CIF_ ## code, |
| /* Reasons for inlining failures. */ |
| |
| enum cgraph_inline_failed_t { |
| #include "cif-code.def" |
| CIF_N_REASONS |
| }; |
| |
| enum cgraph_inline_failed_type_t |
| { |
| CIF_FINAL_NORMAL = 0, |
| CIF_FINAL_ERROR |
| }; |
| |
| struct cgraph_edge; |
| |
| struct cgraph_edge_hasher : ggc_ptr_hash<cgraph_edge> |
| { |
| typedef gimple *compare_type; |
| |
| static hashval_t hash (cgraph_edge *); |
| static hashval_t hash (gimple *); |
| static bool equal (cgraph_edge *, gimple *); |
| }; |
| |
| /* The cgraph data structure. |
| Each function decl has assigned cgraph_node listing callees and callers. */ |
| |
| struct GTY((tag ("SYMTAB_FUNCTION"))) cgraph_node : public symtab_node |
| { |
| friend class symbol_table; |
| |
| /* Constructor. */ |
| explicit cgraph_node (int uid) |
| : symtab_node (SYMTAB_FUNCTION), callees (NULL), callers (NULL), |
| indirect_calls (NULL), origin (NULL), nested (NULL), next_nested (NULL), |
| next_sibling_clone (NULL), prev_sibling_clone (NULL), clones (NULL), |
| clone_of (NULL), call_site_hash (NULL), former_clone_of (NULL), |
| simdclone (NULL), simd_clones (NULL), ipa_transforms_to_apply (vNULL), |
| inlined_to (NULL), rtl (NULL), clone (), thunk (), |
| count (profile_count::uninitialized ()), |
| count_materialization_scale (REG_BR_PROB_BASE), profile_id (0), |
| unit_id (0), tp_first_run (0), used_as_abstract_origin (false), |
| lowered (false), process (false), frequency (NODE_FREQUENCY_NORMAL), |
| only_called_at_startup (false), only_called_at_exit (false), |
| tm_clone (false), dispatcher_function (false), calls_comdat_local (false), |
| icf_merged (false), nonfreeing_fn (false), merged_comdat (false), |
| merged_extern_inline (false), parallelized_function (false), |
| split_part (false), indirect_call_target (false), local (false), |
| versionable (false), can_change_signature (false), |
| redefined_extern_inline (false), tm_may_enter_irr (false), |
| ipcp_clone (false), m_uid (uid), m_summary_id (-1) |
| {} |
| |
| /* Remove the node from cgraph and all inline clones inlined into it. |
| Skip however removal of FORBIDDEN_NODE and return true if it needs to be |
| removed. This allows to call the function from outer loop walking clone |
| tree. */ |
| bool remove_symbol_and_inline_clones (cgraph_node *forbidden_node = NULL); |
| |
| /* Record all references from cgraph_node that are taken |
| in statement STMT. */ |
| void record_stmt_references (gimple *stmt); |
| |
| /* Like cgraph_set_call_stmt but walk the clone tree and update all |
| clones sharing the same function body. |
| When WHOLE_SPECULATIVE_EDGES is true, all three components of |
| speculative edge gets updated. Otherwise we update only direct |
| call. */ |
| void set_call_stmt_including_clones (gimple *old_stmt, gcall *new_stmt, |
| bool update_speculative = true); |
| |
| /* Walk the alias chain to return the function cgraph_node is alias of. |
| Walk through thunk, too. |
| When AVAILABILITY is non-NULL, get minimal availability in the chain. |
| When REF is non-NULL, assume that reference happens in symbol REF |
| when determining the availability. */ |
| cgraph_node *function_symbol (enum availability *avail = NULL, |
| struct symtab_node *ref = NULL); |
| |
| /* Walk the alias chain to return the function cgraph_node is alias of. |
| Walk through non virtual thunks, too. Thus we return either a function |
| or a virtual thunk node. |
| When AVAILABILITY is non-NULL, get minimal availability in the chain. |
| When REF is non-NULL, assume that reference happens in symbol REF |
| when determining the availability. */ |
| cgraph_node *function_or_virtual_thunk_symbol |
| (enum availability *avail = NULL, |
| struct symtab_node *ref = NULL); |
| |
| /* Create node representing clone of N executed COUNT times. Decrease |
| the execution counts from original node too. |
| The new clone will have decl set to DECL that may or may not be the same |
| as decl of N. |
| |
| When UPDATE_ORIGINAL is true, the counts are subtracted from the original |
| function's profile to reflect the fact that part of execution is handled |
| by node. |
| When CALL_DUPLICATION_HOOK is true, the ipa passes are acknowledged about |
| the new clone. Otherwise the caller is responsible for doing so later. |
| |
| If the new node is being inlined into another one, NEW_INLINED_TO should be |
| the outline function the new one is (even indirectly) inlined to. |
| All hooks will see this in node's inlined_to, when invoked. |
| Can be NULL if the node is not inlined. SUFFIX is string that is appended |
| to the original name. */ |
| cgraph_node *create_clone (tree decl, profile_count count, |
| bool update_original, |
| vec<cgraph_edge *> redirect_callers, |
| bool call_duplication_hook, |
| cgraph_node *new_inlined_to, |
| ipa_param_adjustments *param_adjustments, |
| const char *suffix = NULL); |
| |
| /* Create callgraph node clone with new declaration. The actual body will be |
| copied later at compilation stage. The name of the new clone will be |
| constructed from the name of the original node, SUFFIX and NUM_SUFFIX. */ |
| cgraph_node *create_virtual_clone (vec<cgraph_edge *> redirect_callers, |
| vec<ipa_replace_map *, va_gc> *tree_map, |
| ipa_param_adjustments *param_adjustments, |
| const char * suffix, unsigned num_suffix); |
| |
| /* Remove the node from the tree of virtual and inline clones and make it a |
| standalone node - not a clone any more. */ |
| void remove_from_clone_tree (); |
| |
| /* cgraph node being removed from symbol table; see if its entry can be |
| replaced by other inline clone. */ |
| cgraph_node *find_replacement (void); |
| |
| /* Create a new cgraph node which is the new version of |
| callgraph node. REDIRECT_CALLERS holds the callers |
| edges which should be redirected to point to |
| NEW_VERSION. ALL the callees edges of the node |
| are cloned to the new version node. Return the new |
| version node. |
| |
| If non-NULL BLOCK_TO_COPY determine what basic blocks |
| was copied to prevent duplications of calls that are dead |
| in the clone. |
| |
| SUFFIX is string that is appended to the original name. */ |
| |
| cgraph_node *create_version_clone (tree new_decl, |
| vec<cgraph_edge *> redirect_callers, |
| bitmap bbs_to_copy, |
| const char *suffix = NULL); |
| |
| /* Perform function versioning. |
| Function versioning includes copying of the tree and |
| a callgraph update (creating a new cgraph node and updating |
| its callees and callers). |
| |
| REDIRECT_CALLERS varray includes the edges to be redirected |
| to the new version. |
| |
| TREE_MAP is a mapping of tree nodes we want to replace with |
| new ones (according to results of prior analysis). |
| |
| If non-NULL ARGS_TO_SKIP determine function parameters to remove |
| from new version. |
| If SKIP_RETURN is true, the new version will return void. |
| If non-NULL BLOCK_TO_COPY determine what basic blocks to copy. |
| If non_NULL NEW_ENTRY determine new entry BB of the clone. |
| |
| If TARGET_ATTRIBUTES is non-null, when creating a new declaration, |
| add the attributes to DECL_ATTRIBUTES. And call valid_attribute_p |
| that will promote value of the attribute DECL_FUNCTION_SPECIFIC_TARGET |
| of the declaration. |
| |
| Return the new version's cgraph node. */ |
| cgraph_node *create_version_clone_with_body |
| (vec<cgraph_edge *> redirect_callers, |
| vec<ipa_replace_map *, va_gc> *tree_map, |
| ipa_param_adjustments *param_adjustments, |
| bitmap bbs_to_copy, basic_block new_entry_block, const char *clone_name, |
| tree target_attributes = NULL_TREE); |
| |
| /* Insert a new cgraph_function_version_info node into cgraph_fnver_htab |
| corresponding to cgraph_node. */ |
| cgraph_function_version_info *insert_new_function_version (void); |
| |
| /* Get the cgraph_function_version_info node corresponding to node. */ |
| cgraph_function_version_info *function_version (void); |
| |
| /* Discover all functions and variables that are trivially needed, analyze |
| them as well as all functions and variables referred by them */ |
| void analyze (void); |
| |
| /* Add thunk alias into callgraph. The alias declaration is ALIAS and it |
| aliases DECL with an adjustments made into the first parameter. |
| See comments in struct cgraph_thunk_info for detail on the parameters. */ |
| cgraph_node * create_thunk (tree alias, tree, bool this_adjusting, |
| HOST_WIDE_INT fixed_offset, |
| HOST_WIDE_INT virtual_value, |
| HOST_WIDE_INT indirect_offset, |
| tree virtual_offset, |
| tree real_alias); |
| |
| |
| /* Return node that alias is aliasing. */ |
| inline cgraph_node *get_alias_target (void); |
| |
| /* Given function symbol, walk the alias chain to return the function node |
| is alias of. Do not walk through thunks. |
| When AVAILABILITY is non-NULL, get minimal availability in the chain. |
| When REF is non-NULL, assume that reference happens in symbol REF |
| when determining the availability. */ |
| |
| cgraph_node *ultimate_alias_target (availability *availability = NULL, |
| symtab_node *ref = NULL); |
| |
| /* Expand thunk NODE to gimple if possible. |
| When FORCE_GIMPLE_THUNK is true, gimple thunk is created and |
| no assembler is produced. |
| When OUTPUT_ASM_THUNK is true, also produce assembler for |
| thunks that are not lowered. */ |
| bool expand_thunk (bool output_asm_thunks, bool force_gimple_thunk); |
| |
| /* Call expand_thunk on all callers that are thunks and analyze those |
| nodes that were expanded. */ |
| void expand_all_artificial_thunks (); |
| |
| /* Assemble thunks and aliases associated to node. */ |
| void assemble_thunks_and_aliases (void); |
| |
| /* Expand function specified by node. */ |
| void expand (void); |
| |
| /* As an GCC extension we allow redefinition of the function. The |
| semantics when both copies of bodies differ is not well defined. |
| We replace the old body with new body so in unit at a time mode |
| we always use new body, while in normal mode we may end up with |
| old body inlined into some functions and new body expanded and |
| inlined in others. */ |
| void reset (void); |
| |
| /* Creates a wrapper from cgraph_node to TARGET node. Thunk is used for this |
| kind of wrapper method. */ |
| void create_wrapper (cgraph_node *target); |
| |
| /* Verify cgraph nodes of the cgraph node. */ |
| void DEBUG_FUNCTION verify_node (void); |
| |
| /* Remove function from symbol table. */ |
| void remove (void); |
| |
| /* Dump call graph node to file F. */ |
| void dump (FILE *f); |
| |
| /* Dump call graph node to file F. */ |
| void dump_graphviz (FILE *f); |
| |
| /* Dump call graph node to stderr. */ |
| void DEBUG_FUNCTION debug (void); |
| |
| /* When doing LTO, read cgraph_node's body from disk if it is not already |
| present. */ |
| bool get_untransformed_body (void); |
| |
| /* Prepare function body. When doing LTO, read cgraph_node's body from disk |
| if it is not already present. When some IPA transformations are scheduled, |
| apply them. */ |
| bool get_body (void); |
| |
| /* Release memory used to represent body of function. |
| Use this only for functions that are released before being translated to |
| target code (i.e. RTL). Functions that are compiled to RTL and beyond |
| are free'd in final.c via free_after_compilation(). */ |
| void release_body (bool keep_arguments = false); |
| |
| /* Return the DECL_STRUCT_FUNCTION of the function. */ |
| struct function *get_fun () const; |
| |
| /* cgraph_node is no longer nested function; update cgraph accordingly. */ |
| void unnest (void); |
| |
| /* Bring cgraph node local. */ |
| void make_local (void); |
| |
| /* Likewise indicate that a node is having address taken. */ |
| void mark_address_taken (void); |
| |
| /* Set finalization priority to PRIORITY. */ |
| void set_fini_priority (priority_type priority); |
| |
| /* Return the finalization priority. */ |
| priority_type get_fini_priority (void); |
| |
| /* Create edge from a given function to CALLEE in the cgraph. */ |
| cgraph_edge *create_edge (cgraph_node *callee, |
| gcall *call_stmt, profile_count count, |
| bool cloning_p = false); |
| |
| /* Create an indirect edge with a yet-undetermined callee where the call |
| statement destination is a formal parameter of the caller with index |
| PARAM_INDEX. */ |
| cgraph_edge *create_indirect_edge (gcall *call_stmt, int ecf_flags, |
| profile_count count, |
| bool cloning_p = false); |
| |
| /* Like cgraph_create_edge walk the clone tree and update all clones sharing |
| same function body. If clones already have edge for OLD_STMT; only |
| update the edge same way as cgraph_set_call_stmt_including_clones does. */ |
| void create_edge_including_clones (cgraph_node *callee, |
| gimple *old_stmt, gcall *stmt, |
| profile_count count, |
| cgraph_inline_failed_t reason); |
| |
| /* Return the callgraph edge representing the GIMPLE_CALL statement |
| CALL_STMT. */ |
| cgraph_edge *get_edge (gimple *call_stmt); |
| |
| /* Collect all callers of cgraph_node and its aliases that are known to lead |
| to NODE (i.e. are not overwritable) and that are not thunks. */ |
| vec<cgraph_edge *> collect_callers (void); |
| |
| /* Remove all callers from the node. */ |
| void remove_callers (void); |
| |
| /* Remove all callees from the node. */ |
| void remove_callees (void); |
| |
| /* Return function availability. See cgraph.h for description of individual |
| return values. */ |
| enum availability get_availability (symtab_node *ref = NULL); |
| |
| /* Set TREE_NOTHROW on cgraph_node's decl and on aliases of the node |
| if any to NOTHROW. */ |
| bool set_nothrow_flag (bool nothrow); |
| |
| /* SET DECL_IS_MALLOC on cgraph_node's decl and on aliases of the node |
| if any. */ |
| bool set_malloc_flag (bool malloc_p); |
| |
| /* If SET_CONST is true, mark function, aliases and thunks to be ECF_CONST. |
| If SET_CONST if false, clear the flag. |
| |
| When setting the flag be careful about possible interposition and |
| do not set the flag for functions that can be interposed and set pure |
| flag for functions that can bind to other definition. |
| |
| Return true if any change was done. */ |
| |
| bool set_const_flag (bool set_const, bool looping); |
| |
| /* Set DECL_PURE_P on cgraph_node's decl and on aliases of the node |
| if any to PURE. |
| |
| When setting the flag, be careful about possible interposition. |
| Return true if any change was done. */ |
| |
| bool set_pure_flag (bool pure, bool looping); |
| |
| /* Call callback on function and aliases associated to the function. |
| When INCLUDE_OVERWRITABLE is false, overwritable aliases and thunks are |
| skipped. */ |
| |
| bool call_for_symbol_and_aliases (bool (*callback) (cgraph_node *, |
| void *), |
| void *data, bool include_overwritable); |
| |
| /* Call callback on cgraph_node, thunks and aliases associated to NODE. |
| When INCLUDE_OVERWRITABLE is false, overwritable aliases and thunks are |
| skipped. When EXCLUDE_VIRTUAL_THUNKS is true, virtual thunks are |
| skipped. */ |
| bool call_for_symbol_thunks_and_aliases (bool (*callback) (cgraph_node *node, |
| void *data), |
| void *data, |
| bool include_overwritable, |
| bool exclude_virtual_thunks = false); |
| |
| /* Likewise indicate that a node is needed, i.e. reachable via some |
| external means. */ |
| inline void mark_force_output (void); |
| |
| /* Return true when function can be marked local. */ |
| bool local_p (void); |
| |
| /* Return true if cgraph_node can be made local for API change. |
| Extern inline functions and C++ COMDAT functions can be made local |
| at the expense of possible code size growth if function is used in multiple |
| compilation units. */ |
| bool can_be_local_p (void); |
| |
| /* Return true when cgraph_node cannot return or throw and thus |
| it is safe to ignore its side effects for IPA analysis. */ |
| bool cannot_return_p (void); |
| |
| /* Return true when function cgraph_node and all its aliases are only called |
| directly. |
| i.e. it is not externally visible, address was not taken and |
| it is not used in any other non-standard way. */ |
| bool only_called_directly_p (void); |
| |
| /* Return true when function is only called directly or it has alias. |
| i.e. it is not externally visible, address was not taken and |
| it is not used in any other non-standard way. */ |
| inline bool only_called_directly_or_aliased_p (void); |
| |
| /* Return true when function cgraph_node can be expected to be removed |
| from program when direct calls in this compilation unit are removed. |
| |
| As a special case COMDAT functions are |
| cgraph_can_remove_if_no_direct_calls_p while the are not |
| cgraph_only_called_directly_p (it is possible they are called from other |
| unit) |
| |
| This function behaves as cgraph_only_called_directly_p because eliminating |
| all uses of COMDAT function does not make it necessarily disappear from |
| the program unless we are compiling whole program or we do LTO. In this |
| case we know we win since dynamic linking will not really discard the |
| linkonce section. |
| |
| If WILL_INLINE is true, assume that function will be inlined into all the |
| direct calls. */ |
| bool will_be_removed_from_program_if_no_direct_calls_p |
| (bool will_inline = false); |
| |
| /* Return true when function can be removed from callgraph |
| if all direct calls and references are eliminated. The function does |
| not take into account comdat groups. */ |
| bool can_remove_if_no_direct_calls_and_refs_p (void); |
| |
| /* Return true when function cgraph_node and its aliases can be removed from |
| callgraph if all direct calls are eliminated. |
| If WILL_INLINE is true, assume that function will be inlined into all the |
| direct calls. */ |
| bool can_remove_if_no_direct_calls_p (bool will_inline = false); |
| |
| /* Return true when callgraph node is a function with Gimple body defined |
| in current unit. Functions can also be define externally or they |
| can be thunks with no Gimple representation. |
| |
| Note that at WPA stage, the function body may not be present in memory. */ |
| inline bool has_gimple_body_p (void); |
| |
| /* Return true if this node represents a former, i.e. an expanded, thunk. */ |
| inline bool former_thunk_p (void); |
| |
| /* Check if function calls comdat local. This is used to recompute |
| calls_comdat_local flag after function transformations. */ |
| bool check_calls_comdat_local_p (); |
| |
| /* Return true if function should be optimized for size. */ |
| bool optimize_for_size_p (void); |
| |
| /* Dump the callgraph to file F. */ |
| static void dump_cgraph (FILE *f); |
| |
| /* Dump the call graph to stderr. */ |
| static inline |
| void debug_cgraph (void) |
| { |
| dump_cgraph (stderr); |
| } |
| |
| /* Get unique identifier of the node. */ |
| inline int get_uid () |
| { |
| return m_uid; |
| } |
| |
| /* Get summary id of the node. */ |
| inline int get_summary_id () |
| { |
| return m_summary_id; |
| } |
| |
| /* Record that DECL1 and DECL2 are semantically identical function |
| versions. */ |
| static void record_function_versions (tree decl1, tree decl2); |
| |
| /* Remove the cgraph_function_version_info and cgraph_node for DECL. This |
| DECL is a duplicate declaration. */ |
| static void delete_function_version_by_decl (tree decl); |
| |
| /* Add the function FNDECL to the call graph. |
| Unlike finalize_function, this function is intended to be used |
| by middle end and allows insertion of new function at arbitrary point |
| of compilation. The function can be either in high, low or SSA form |
| GIMPLE. |
| |
| The function is assumed to be reachable and have address taken (so no |
| API breaking optimizations are performed on it). |
| |
| Main work done by this function is to enqueue the function for later |
| processing to avoid need the passes to be re-entrant. */ |
| static void add_new_function (tree fndecl, bool lowered); |
| |
| /* Return callgraph node for given symbol and check it is a function. */ |
| static inline cgraph_node *get (const_tree decl) |
| { |
| gcc_checking_assert (TREE_CODE (decl) == FUNCTION_DECL); |
| return dyn_cast <cgraph_node *> (symtab_node::get (decl)); |
| } |
| |
| /* DECL has been parsed. Take it, queue it, compile it at the whim of the |
| logic in effect. If NO_COLLECT is true, then our caller cannot stand to |
| have the garbage collector run at the moment. We would need to either |
| create a new GC context, or just not compile right now. */ |
| static void finalize_function (tree, bool); |
| |
| /* Return cgraph node assigned to DECL. Create new one when needed. */ |
| static cgraph_node * create (tree decl); |
| |
| /* Try to find a call graph node for declaration DECL and if it does not |
| exist or if it corresponds to an inline clone, create a new one. */ |
| static cgraph_node * get_create (tree); |
| |
| /* Return local info for the compiled function. */ |
| static cgraph_node *local_info_node (tree decl); |
| |
| /* Return RTL info for the compiled function. */ |
| static struct cgraph_rtl_info *rtl_info (const_tree); |
| |
| /* Return the cgraph node that has ASMNAME for its DECL_ASSEMBLER_NAME. |
| Return NULL if there's no such node. */ |
| static cgraph_node *get_for_asmname (tree asmname); |
| |
| /* Attempt to mark ALIAS as an alias to DECL. Return alias node if |
| successful and NULL otherwise. |
| Same body aliases are output whenever the body of DECL is output, |
| and cgraph_node::get (ALIAS) transparently |
| returns cgraph_node::get (DECL). */ |
| static cgraph_node * create_same_body_alias (tree alias, tree decl); |
| |
| /* Verify whole cgraph structure. */ |
| static void DEBUG_FUNCTION verify_cgraph_nodes (void); |
| |
| /* Verify cgraph, if consistency checking is enabled. */ |
| static inline void checking_verify_cgraph_nodes (void); |
| |
| /* Worker to bring NODE local. */ |
| static bool make_local (cgraph_node *node, void *); |
| |
| /* Mark ALIAS as an alias to DECL. DECL_NODE is cgraph node representing |
| the function body is associated |
| with (not necessarily cgraph_node (DECL). */ |
| static cgraph_node *create_alias (tree alias, tree target); |
| |
| /* Return true if NODE has thunk. */ |
| static bool has_thunk_p (cgraph_node *node, void *); |
| |
| cgraph_edge *callees; |
| cgraph_edge *callers; |
| /* List of edges representing indirect calls with a yet undetermined |
| callee. */ |
| cgraph_edge *indirect_calls; |
| /* For nested functions points to function the node is nested in. */ |
| cgraph_node *origin; |
| /* Points to first nested function, if any. */ |
| cgraph_node *nested; |
| /* Pointer to the next function with same origin, if any. */ |
| cgraph_node *next_nested; |
| /* Pointer to the next clone. */ |
| cgraph_node *next_sibling_clone; |
| cgraph_node *prev_sibling_clone; |
| cgraph_node *clones; |
| cgraph_node *clone_of; |
| /* For functions with many calls sites it holds map from call expression |
| to the edge to speed up cgraph_edge function. */ |
| hash_table<cgraph_edge_hasher> *GTY(()) call_site_hash; |
| /* Declaration node used to be clone of. */ |
| tree former_clone_of; |
| |
| /* If this is a SIMD clone, this points to the SIMD specific |
| information for it. */ |
| cgraph_simd_clone *simdclone; |
| /* If this function has SIMD clones, this points to the first clone. */ |
| cgraph_node *simd_clones; |
| |
| /* Interprocedural passes scheduled to have their transform functions |
| applied next time we execute local pass on them. We maintain it |
| per-function in order to allow IPA passes to introduce new functions. */ |
| vec<ipa_opt_pass> GTY((skip)) ipa_transforms_to_apply; |
| |
| /* For inline clones this points to the function they will be |
| inlined into. */ |
| cgraph_node *inlined_to; |
| |
| struct cgraph_rtl_info *rtl; |
| cgraph_clone_info clone; |
| cgraph_thunk_info thunk; |
| |
| /* Expected number of executions: calculated in profile.c. */ |
| profile_count count; |
| /* How to scale counts at materialization time; used to merge |
| LTO units with different number of profile runs. */ |
| int count_materialization_scale; |
| /* ID assigned by the profiling. */ |
| unsigned int profile_id; |
| /* ID of the translation unit. */ |
| int unit_id; |
| /* Time profiler: first run of function. */ |
| int tp_first_run; |
| |
| /* Set when decl is an abstract function pointed to by the |
| ABSTRACT_DECL_ORIGIN of a reachable function. */ |
| unsigned used_as_abstract_origin : 1; |
| /* Set once the function is lowered (i.e. its CFG is built). */ |
| unsigned lowered : 1; |
| /* Set once the function has been instantiated and its callee |
| lists created. */ |
| unsigned process : 1; |
| /* How commonly executed the node is. Initialized during branch |
| probabilities pass. */ |
| ENUM_BITFIELD (node_frequency) frequency : 2; |
| /* True when function can only be called at startup (from static ctor). */ |
| unsigned only_called_at_startup : 1; |
| /* True when function can only be called at startup (from static dtor). */ |
| unsigned only_called_at_exit : 1; |
| /* True when function is the transactional clone of a function which |
| is called only from inside transactions. */ |
| /* ?? We should be able to remove this. We have enough bits in |
| cgraph to calculate it. */ |
| unsigned tm_clone : 1; |
| /* True if this decl is a dispatcher for function versions. */ |
| unsigned dispatcher_function : 1; |
| /* True if this decl calls a COMDAT-local function. This is set up in |
| compute_fn_summary and inline_call. */ |
| unsigned calls_comdat_local : 1; |
| /* True if node has been created by merge operation in IPA-ICF. */ |
| unsigned icf_merged: 1; |
| /* True if call to node can't result in a call to free, munmap or |
| other operation that could make previously non-trapping memory |
| accesses trapping. */ |
| unsigned nonfreeing_fn : 1; |
| /* True if there was multiple COMDAT bodies merged by lto-symtab. */ |
| unsigned merged_comdat : 1; |
| /* True if this def was merged with extern inlines. */ |
| unsigned merged_extern_inline : 1; |
| /* True if function was created to be executed in parallel. */ |
| unsigned parallelized_function : 1; |
| /* True if function is part split out by ipa-split. */ |
| unsigned split_part : 1; |
| /* True if the function appears as possible target of indirect call. */ |
| unsigned indirect_call_target : 1; |
| /* Set when function is visible in current compilation unit only and |
| its address is never taken. */ |
| unsigned local : 1; |
| /* False when there is something makes versioning impossible. */ |
| unsigned versionable : 1; |
| /* False when function calling convention and signature cannot be changed. |
| This is the case when __builtin_apply_args is used. */ |
| unsigned can_change_signature : 1; |
| /* True when the function has been originally extern inline, but it is |
| redefined now. */ |
| unsigned redefined_extern_inline : 1; |
| /* True if the function may enter serial irrevocable mode. */ |
| unsigned tm_may_enter_irr : 1; |
| /* True if this was a clone created by ipa-cp. */ |
| unsigned ipcp_clone : 1; |
| |
| private: |
| /* Unique id of the node. */ |
| int m_uid; |
| |
| /* Summary id that is recycled. */ |
| int m_summary_id; |
| |
| /* Worker for call_for_symbol_and_aliases. */ |
| bool call_for_symbol_and_aliases_1 (bool (*callback) (cgraph_node *, |
| void *), |
| void *data, bool include_overwritable); |
| }; |
| |
| /* A cgraph node set is a collection of cgraph nodes. A cgraph node |
| can appear in multiple sets. */ |
| struct cgraph_node_set_def |
| { |
| hash_map<cgraph_node *, size_t> *map; |
| vec<cgraph_node *> nodes; |
| }; |
| |
| typedef cgraph_node_set_def *cgraph_node_set; |
| typedef struct varpool_node_set_def *varpool_node_set; |
| |
| struct varpool_node; |
| |
| /* A varpool node set is a collection of varpool nodes. A varpool node |
| can appear in multiple sets. */ |
| struct varpool_node_set_def |
| { |
| hash_map<varpool_node *, size_t> * map; |
| vec<varpool_node *> nodes; |
| }; |
| |
| /* Iterator structure for cgraph node sets. */ |
| struct cgraph_node_set_iterator |
| { |
| cgraph_node_set set; |
| unsigned index; |
| }; |
| |
| /* Iterator structure for varpool node sets. */ |
| struct varpool_node_set_iterator |
| { |
| varpool_node_set set; |
| unsigned index; |
| }; |
| |
| /* Context of polymorphic call. It represent information about the type of |
| instance that may reach the call. This is used by ipa-devirt walkers of the |
| type inheritance graph. */ |
| |
| class GTY(()) ipa_polymorphic_call_context { |
| public: |
| /* The called object appears in an object of type OUTER_TYPE |
| at offset OFFSET. When information is not 100% reliable, we |
| use SPECULATIVE_OUTER_TYPE and SPECULATIVE_OFFSET. */ |
| HOST_WIDE_INT offset; |
| HOST_WIDE_INT speculative_offset; |
| tree outer_type; |
| tree speculative_outer_type; |
| /* True if outer object may be in construction or destruction. */ |
| unsigned maybe_in_construction : 1; |
| /* True if outer object may be of derived type. */ |
| unsigned maybe_derived_type : 1; |
| /* True if speculative outer object may be of derived type. We always |
| speculate that construction does not happen. */ |
| unsigned speculative_maybe_derived_type : 1; |
| /* True if the context is invalid and all calls should be redirected |
| to BUILTIN_UNREACHABLE. */ |
| unsigned invalid : 1; |
| /* True if the outer type is dynamic. */ |
| unsigned dynamic : 1; |
| |
| /* Build empty "I know nothing" context. */ |
| ipa_polymorphic_call_context (); |
| /* Build polymorphic call context for indirect call E. */ |
| ipa_polymorphic_call_context (cgraph_edge *e); |
| /* Build polymorphic call context for IP invariant CST. |
| If specified, OTR_TYPE specify the type of polymorphic call |
| that takes CST+OFFSET as a parameter. */ |
| ipa_polymorphic_call_context (tree cst, tree otr_type = NULL, |
| HOST_WIDE_INT offset = 0); |
| /* Build context for pointer REF contained in FNDECL at statement STMT. |
| if INSTANCE is non-NULL, return pointer to the object described by |
| the context. */ |
| ipa_polymorphic_call_context (tree fndecl, tree ref, gimple *stmt, |
| tree *instance = NULL); |
| |
| /* Look for vtable stores or constructor calls to work out dynamic type |
| of memory location. */ |
| bool get_dynamic_type (tree, tree, tree, gimple *, unsigned *); |
| |
| /* Make context non-speculative. */ |
| void clear_speculation (); |
| |
| /* Produce context specifying all derived types of OTR_TYPE. If OTR_TYPE is |
| NULL, the context is set to dummy "I know nothing" setting. */ |
| void clear_outer_type (tree otr_type = NULL); |
| |
| /* Walk container types and modify context to point to actual class |
| containing OTR_TYPE (if non-NULL) as base class. |
| Return true if resulting context is valid. |
| |
| When CONSIDER_PLACEMENT_NEW is false, reject contexts that may be made |
| valid only via allocation of new polymorphic type inside by means |
| of placement new. |
| |
| When CONSIDER_BASES is false, only look for actual fields, not base types |
| of TYPE. */ |
| bool restrict_to_inner_class (tree otr_type, |
| bool consider_placement_new = true, |
| bool consider_bases = true); |
| |
| /* Adjust all offsets in contexts by given number of bits. */ |
| void offset_by (HOST_WIDE_INT); |
| /* Use when we cannot track dynamic type change. This speculatively assume |
| type change is not happening. */ |
| void possible_dynamic_type_change (bool, tree otr_type = NULL); |
| /* Assume that both THIS and a given context is valid and strengthen THIS |
| if possible. Return true if any strengthening was made. |
| If actual type the context is being used in is known, OTR_TYPE should be |
| set accordingly. This improves quality of combined result. */ |
| bool combine_with (ipa_polymorphic_call_context, tree otr_type = NULL); |
| bool meet_with (ipa_polymorphic_call_context, tree otr_type = NULL); |
| |
| /* Return TRUE if context is fully useless. */ |
| bool useless_p () const; |
| /* Return TRUE if this context conveys the same information as X. */ |
| bool equal_to (const ipa_polymorphic_call_context &x) const; |
| |
| /* Dump human readable context to F. If NEWLINE is true, it will be |
| terminated by a newline. */ |
| void dump (FILE *f, bool newline = true) const; |
| void DEBUG_FUNCTION debug () const; |
| |
| /* LTO streaming. */ |
| void stream_out (struct output_block *) const; |
| void stream_in (class lto_input_block *, class data_in *data_in); |
| |
| private: |
| bool combine_speculation_with (tree, HOST_WIDE_INT, bool, tree); |
| bool meet_speculation_with (tree, HOST_WIDE_INT, bool, tree); |
| void set_by_decl (tree, HOST_WIDE_INT); |
| bool set_by_invariant (tree, tree, HOST_WIDE_INT); |
| bool speculation_consistent_p (tree, HOST_WIDE_INT, bool, tree) const; |
| void make_speculative (tree otr_type = NULL); |
| }; |
| |
| /* Structure containing additional information about an indirect call. */ |
| |
| class GTY(()) cgraph_indirect_call_info |
| { |
| public: |
| /* When agg_content is set, an offset where the call pointer is located |
| within the aggregate. */ |
| HOST_WIDE_INT offset; |
| /* Context of the polymorphic call; use only when POLYMORPHIC flag is set. */ |
| ipa_polymorphic_call_context context; |
| /* OBJ_TYPE_REF_TOKEN of a polymorphic call (if polymorphic is set). */ |
| HOST_WIDE_INT otr_token; |
| /* Type of the object from OBJ_TYPE_REF_OBJECT. */ |
| tree otr_type; |
| /* Index of the parameter that is called. */ |
| int param_index; |
| /* ECF flags determined from the caller. */ |
| int ecf_flags; |
| |
| /* Number of speculative call targets, it's less than GCOV_TOPN_VALUES. */ |
| unsigned num_speculative_call_targets : 16; |
| |
| /* Set when the call is a virtual call with the parameter being the |
| associated object pointer rather than a simple direct call. */ |
| unsigned polymorphic : 1; |
| /* Set when the call is a call of a pointer loaded from contents of an |
| aggregate at offset. */ |
| unsigned agg_contents : 1; |
| /* Set when this is a call through a member pointer. */ |
| unsigned member_ptr : 1; |
| /* When the agg_contents bit is set, this one determines whether the |
| destination is loaded from a parameter passed by reference. */ |
| unsigned by_ref : 1; |
| /* When the agg_contents bit is set, this one determines whether we can |
| deduce from the function body that the loaded value from the reference is |
| never modified between the invocation of the function and the load |
| point. */ |
| unsigned guaranteed_unmodified : 1; |
| /* For polymorphic calls this specify whether the virtual table pointer |
| may have changed in between function entry and the call. */ |
| unsigned vptr_changed : 1; |
| }; |
| |
| class GTY((chain_next ("%h.next_caller"), chain_prev ("%h.prev_caller"), |
| for_user)) cgraph_edge |
| { |
| public: |
| friend struct cgraph_node; |
| friend class symbol_table; |
| |
| /* Remove EDGE from the cgraph. */ |
| static void remove (cgraph_edge *edge); |
| |
| /* Change field call_stmt of edge E to NEW_STMT. If UPDATE_SPECULATIVE and E |
| is any component of speculative edge, then update all components. |
| Speculations can be resolved in the process and EDGE can be removed and |
| deallocated. Return the edge that now represents the call. */ |
| static cgraph_edge *set_call_stmt (cgraph_edge *e, gcall *new_stmt, |
| bool update_speculative = true); |
| |
| /* Redirect callee of the edge to N. The function does not update underlying |
| call expression. */ |
| void redirect_callee (cgraph_node *n); |
| |
| /* If the edge does not lead to a thunk, simply redirect it to N. Otherwise |
| create one or more equivalent thunks for N and redirect E to the first in |
| the chain. Note that it is then necessary to call |
| n->expand_all_artificial_thunks once all callers are redirected. */ |
| void redirect_callee_duplicating_thunks (cgraph_node *n); |
| |
| /* Make an indirect edge with an unknown callee an ordinary edge leading to |
| CALLEE. Speculations can be resolved in the process and EDGE can be |
| removed and deallocated. Return the edge that now represents the |
| call. */ |
| static cgraph_edge *make_direct (cgraph_edge *edge, cgraph_node *callee); |
| |
| /* Turn edge into speculative call calling N2. Update |
| the profile so the direct call is taken COUNT times |
| with FREQUENCY. speculative_id is used to link direct calls with their |
| corresponding IPA_REF_ADDR references when representing speculative calls. |
| */ |
| cgraph_edge *make_speculative (cgraph_node *n2, profile_count direct_count, |
| unsigned int speculative_id = 0); |
| |
| /* Speculative call consists of an indirect edge and one or more |
| direct edge+ref pairs. Speculative will expand to the following sequence: |
| |
| if (call_dest == target1) // reference to target1 |
| target1 (); // direct call to target1 |
| else if (call_dest == target2) // reference to targt2 |
| target2 (); // direct call to target2 |
| else |
| call_dest (); // indirect call |
| |
| Before the expansion we will have indirect call and the direct call+ref |
| pairs all linked to single statement. |
| |
| Note that ref may point to different symbol than the corresponding call |
| becuase the speculated edge may have been optimized (redirected to |
| a clone) or inlined. |
| |
| Given an edge which is part of speculative call, return the first |
| direct call edge in the speculative call sequence. |
| |
| In the example above called on any cgraph edge in the sequence it will |
| return direct call to target1. */ |
| cgraph_edge *first_speculative_call_target (); |
| |
| /* Return next speculative call target or NULL if there is none. |
| All targets are required to form an interval in the callee list. |
| |
| In example above, if called on call to target1 it will return call to |
| target2. */ |
| cgraph_edge *next_speculative_call_target () |
| { |
| cgraph_edge *e = this; |
| gcc_checking_assert (speculative && callee); |
| |
| if (e->next_callee && e->next_callee->speculative |
| && e->next_callee->call_stmt == e->call_stmt |
| && e->next_callee->lto_stmt_uid == e->lto_stmt_uid) |
| return e->next_callee; |
| return NULL; |
| } |
| |
| /* When called on any edge in the speculative call return the (unique) |
| indirect call edge in the speculative call sequence. */ |
| cgraph_edge *speculative_call_indirect_edge () |
| { |
| gcc_checking_assert (speculative); |
| if (!callee) |
| return this; |
| for (cgraph_edge *e2 = caller->indirect_calls; |
| true; e2 = e2->next_callee) |
| if (e2->speculative |
| && call_stmt == e2->call_stmt |
| && lto_stmt_uid == e2->lto_stmt_uid) |
| return e2; |
| } |
| |
| /* When called on any edge in speculative call and when given any target |
| of ref which is speculated to it returns the corresponding direct call. |
| |
| In example above if called on function target2 it will return call to |
| target2. */ |
| cgraph_edge *speculative_call_for_target (cgraph_node *); |
| |
| /* Return REF corresponding to direct call in the specualtive call |
| sequence. */ |
| ipa_ref *speculative_call_target_ref () |
| { |
| ipa_ref *ref; |
| |
| gcc_checking_assert (speculative); |
| for (unsigned int i = 0; caller->iterate_reference (i, ref); i++) |
| if (ref->speculative && ref->speculative_id == speculative_id |
| && ref->stmt == (gimple *)call_stmt |
| && ref->lto_stmt_uid == lto_stmt_uid) |
| return ref; |
| gcc_unreachable (); |
| } |
| |
| /* Speculative call edge turned out to be direct call to CALLEE_DECL. Remove |
| the speculative call sequence and return edge representing the call, the |
| original EDGE can be removed and deallocated. It is up to caller to |
| redirect the call as appropriate. Return the edge that now represents the |
| call. |
| |
| For "speculative" indirect call that contains multiple "speculative" |
| targets (i.e. edge->indirect_info->num_speculative_call_targets > 1), |
| decrease the count and only remove current direct edge. |
| |
| If no speculative direct call left to the speculative indirect call, remove |
| the speculative of both the indirect call and corresponding direct edge. |
| |
| It is up to caller to iteratively resolve each "speculative" direct call |
| and redirect the call as appropriate. */ |
| static cgraph_edge *resolve_speculation (cgraph_edge *edge, |
| tree callee_decl = NULL); |
| |
| /* If necessary, change the function declaration in the call statement |
| associated with edge E so that it corresponds to the edge callee. |
| Speculations can be resolved in the process and EDGE can be removed and |
| deallocated. |
| |
| The edge could be one of speculative direct call generated from speculative |
| indirect call. In this circumstance, decrease the speculative targets |
| count (i.e. num_speculative_call_targets) and redirect call stmt to the |
| corresponding i-th target. If no speculative direct call left to the |
| speculative indirect call, remove "speculative" of the indirect call and |
| also redirect stmt to it's final direct target. |
| |
| It is up to caller to iteratively transform each "speculative" |
| direct call as appropriate. */ |
| static gimple *redirect_call_stmt_to_callee (cgraph_edge *e); |
| |
| /* Create clone of edge in the node N represented |
| by CALL_EXPR the callgraph. */ |
| cgraph_edge * clone (cgraph_node *n, gcall *call_stmt, unsigned stmt_uid, |
| profile_count num, profile_count den, |
| bool update_original); |
| |
| /* Verify edge count and frequency. */ |
| bool verify_count (); |
| |
| /* Return true when call of edge cannot lead to return from caller |
| and thus it is safe to ignore its side effects for IPA analysis |
| when computing side effects of the caller. */ |
| bool cannot_lead_to_return_p (void); |
| |
| /* Return true when the edge represents a direct recursion. */ |
| bool recursive_p (void); |
| |
| /* Return true if the edge may be considered hot. */ |
| bool maybe_hot_p (void); |
| |
| /* Get unique identifier of the edge. */ |
| inline int get_uid () |
| { |
| return m_uid; |
| } |
| |
| /* Get summary id of the edge. */ |
| inline int get_summary_id () |
| { |
| return m_summary_id; |
| } |
| |
| /* Rebuild cgraph edges for current function node. This needs to be run after |
| passes that don't update the cgraph. */ |
| static unsigned int rebuild_edges (void); |
| |
| /* Rebuild cgraph references for current function node. This needs to be run |
| after passes that don't update the cgraph. */ |
| static void rebuild_references (void); |
| |
| /* During LTO stream in this can be used to check whether call can possibly |
| be internal to the current translation unit. */ |
| bool possibly_call_in_translation_unit_p (void); |
| |
| /* Return num_speculative_targets of this edge. */ |
| int num_speculative_call_targets_p (void); |
| |
| /* Expected number of executions: calculated in profile.c. */ |
| profile_count count; |
| cgraph_node *caller; |
| cgraph_node *callee; |
| cgraph_edge *prev_caller; |
| cgraph_edge *next_caller; |
| cgraph_edge *prev_callee; |
| cgraph_edge *next_callee; |
| gcall *call_stmt; |
| /* Additional information about an indirect call. Not cleared when an edge |
| becomes direct. */ |
| cgraph_indirect_call_info *indirect_info; |
| PTR GTY ((skip (""))) aux; |
| /* When equal to CIF_OK, inline this call. Otherwise, points to the |
| explanation why function was not inlined. */ |
| enum cgraph_inline_failed_t inline_failed; |
| /* The stmt_uid of call_stmt. This is used by LTO to recover the call_stmt |
| when the function is serialized in. */ |
| unsigned int lto_stmt_uid; |
| /* speculative id is used to link direct calls with their corresponding |
| IPA_REF_ADDR references when representing speculative calls. */ |
| unsigned int speculative_id : 16; |
| /* Whether this edge was made direct by indirect inlining. */ |
| unsigned int indirect_inlining_edge : 1; |
| /* Whether this edge describes an indirect call with an undetermined |
| callee. */ |
| unsigned int indirect_unknown_callee : 1; |
| /* Whether this edge is still a dangling */ |
| /* True if the corresponding CALL stmt cannot be inlined. */ |
| unsigned int call_stmt_cannot_inline_p : 1; |
| /* Can this call throw externally? */ |
| unsigned int can_throw_external : 1; |
| /* Edges with SPECULATIVE flag represents indirect calls that was |
| speculatively turned into direct (i.e. by profile feedback). |
| The final code sequence will have form: |
| |
| if (call_target == expected_fn) |
| expected_fn (); |
| else |
| call_target (); |
| |
| Every speculative call is represented by three components attached |
| to a same call statement: |
| 1) a direct call (to expected_fn) |
| 2) an indirect call (to call_target) |
| 3) a IPA_REF_ADDR reference to expected_fn. |
| |
| Optimizers may later redirect direct call to clone, so 1) and 3) |
| do not need to necessarily agree with destination. */ |
| unsigned int speculative : 1; |
| /* Set to true when caller is a constructor or destructor of polymorphic |
| type. */ |
| unsigned in_polymorphic_cdtor : 1; |
| |
| /* Return true if call must bind to current definition. */ |
| bool binds_to_current_def_p (); |
| |
| /* Expected frequency of executions within the function. |
| When set to CGRAPH_FREQ_BASE, the edge is expected to be called once |
| per function call. The range is 0 to CGRAPH_FREQ_MAX. */ |
| int frequency (); |
| |
| /* Expected frequency of executions within the function. */ |
| sreal sreal_frequency (); |
| private: |
| /* Unique id of the edge. */ |
| int m_uid; |
| |
| /* Summary id that is recycled. */ |
| int m_summary_id; |
| |
| /* Remove the edge from the list of the callers of the callee. */ |
| void remove_caller (void); |
| |
| /* Remove the edge from the list of the callees of the caller. */ |
| void remove_callee (void); |
| |
| /* Set callee N of call graph edge and add it to the corresponding set of |
| callers. */ |
| void set_callee (cgraph_node *n); |
| |
| /* Output flags of edge to a file F. */ |
| void dump_edge_flags (FILE *f); |
| |
| /* Verify that call graph edge corresponds to DECL from the associated |
| statement. Return true if the verification should fail. */ |
| bool verify_corresponds_to_fndecl (tree decl); |
| }; |
| |
| #define CGRAPH_FREQ_BASE 1000 |
| #define CGRAPH_FREQ_MAX 100000 |
| |
| /* The varpool data structure. |
| Each static variable decl has assigned varpool_node. */ |
| |
| struct GTY((tag ("SYMTAB_VARIABLE"))) varpool_node : public symtab_node |
| { |
| /* Constructor. */ |
| explicit varpool_node () |
| : symtab_node (SYMTAB_VARIABLE), output (0), dynamically_initialized (0), |
| tls_model (TLS_MODEL_NONE), used_by_single_function (0) |
| {} |
| |
| /* Dump given varpool node to F. */ |
| void dump (FILE *f); |
| |
| /* Dump given varpool node to stderr. */ |
| void DEBUG_FUNCTION debug (void); |
| |
| /* Remove variable from symbol table. */ |
| void remove (void); |
| |
| /* Remove node initializer when it is no longer needed. */ |
| void remove_initializer (void); |
| |
| void analyze (void); |
| |
| /* Return variable availability. */ |
| availability get_availability (symtab_node *ref = NULL); |
| |
| /* When doing LTO, read variable's constructor from disk if |
| it is not already present. */ |
| tree get_constructor (void); |
| |
| /* Return true if variable has constructor that can be used for folding. */ |
| bool ctor_useable_for_folding_p (void); |
| |
| /* For given variable pool node, walk the alias chain to return the function |
| the variable is alias of. Do not walk through thunks. |
| When AVAILABILITY is non-NULL, get minimal availability in the chain. |
| When REF is non-NULL, assume that reference happens in symbol REF |
| when determining the availability. */ |
| inline varpool_node *ultimate_alias_target |
| (availability *availability = NULL, symtab_node *ref = NULL); |
| |
| /* Return node that alias is aliasing. */ |
| inline varpool_node *get_alias_target (void); |
| |
| /* Output one variable, if necessary. Return whether we output it. */ |
| bool assemble_decl (void); |
| |
| /* For variables in named sections make sure get_variable_section |
| is called before we switch to those sections. Then section |
| conflicts between read-only and read-only requiring relocations |
| sections can be resolved. */ |
| void finalize_named_section_flags (void); |
| |
| /* Call callback on varpool symbol and aliases associated to varpool symbol. |
| When INCLUDE_OVERWRITABLE is false, overwritable aliases and thunks are |
| skipped. */ |
| bool call_for_symbol_and_aliases (bool (*callback) (varpool_node *, void *), |
| void *data, |
| bool include_overwritable); |
| |
| /* Return true when variable should be considered externally visible. */ |
| bool externally_visible_p (void); |
| |
| /* Return true when all references to variable must be visible |
| in ipa_ref_list. |
| i.e. if the variable is not externally visible or not used in some magic |
| way (asm statement or such). |
| The magic uses are all summarized in force_output flag. */ |
| inline bool all_refs_explicit_p (); |
| |
| /* Return true when variable can be removed from variable pool |
| if all direct calls are eliminated. */ |
| inline bool can_remove_if_no_refs_p (void); |
| |
| /* Add the variable DECL to the varpool. |
| Unlike finalize_decl function is intended to be used |
| by middle end and allows insertion of new variable at arbitrary point |
| of compilation. */ |
| static void add (tree decl); |
| |
| /* Return varpool node for given symbol and check it is a function. */ |
| static inline varpool_node *get (const_tree decl); |
| |
| /* Mark DECL as finalized. By finalizing the declaration, frontend instruct |
| the middle end to output the variable to asm file, if needed or externally |
| visible. */ |
| static void finalize_decl (tree decl); |
| |
| /* Attempt to mark ALIAS as an alias to DECL. Return TRUE if successful. |
| Extra name aliases are output whenever DECL is output. */ |
| static varpool_node * create_extra_name_alias (tree alias, tree decl); |
| |
| /* Attempt to mark ALIAS as an alias to DECL. Return TRUE if successful. |
| Extra name aliases are output whenever DECL is output. */ |
| static varpool_node * create_alias (tree, tree); |
| |
| /* Dump the variable pool to F. */ |
| static void dump_varpool (FILE *f); |
| |
| /* Dump the variable pool to stderr. */ |
| static void DEBUG_FUNCTION debug_varpool (void); |
| |
| /* Allocate new callgraph node and insert it into basic data structures. */ |
| static varpool_node *create_empty (void); |
| |
| /* Return varpool node assigned to DECL. Create new one when needed. */ |
| static varpool_node *get_create (tree decl); |
| |
| /* Given an assembler name, lookup node. */ |
| static varpool_node *get_for_asmname (tree asmname); |
| |
| /* Set when variable is scheduled to be assembled. */ |
| unsigned output : 1; |
| |
| /* Set if the variable is dynamically initialized, except for |
| function local statics. */ |
| unsigned dynamically_initialized : 1; |
| |
| ENUM_BITFIELD(tls_model) tls_model : 3; |
| |
| /* Set if the variable is known to be used by single function only. |
| This is computed by ipa_single_use pass and used by late optimizations |
| in places where optimization would be valid for local static variable |
| if we did not do any inter-procedural code movement. */ |
| unsigned used_by_single_function : 1; |
| |
| private: |
| /* Assemble thunks and aliases associated to varpool node. */ |
| void assemble_aliases (void); |
| |
| /* Worker for call_for_node_and_aliases. */ |
| bool call_for_symbol_and_aliases_1 (bool (*callback) (varpool_node *, void *), |
| void *data, |
| bool include_overwritable); |
| }; |
| |
| /* Every top level asm statement is put into a asm_node. */ |
| |
| struct GTY(()) asm_node { |
| /* Next asm node. */ |
| asm_node *next; |
| /* String for this asm node. */ |
| tree asm_str; |
| /* Ordering of all cgraph nodes. */ |
| int order; |
| }; |
| |
| /* Report whether or not THIS symtab node is a function, aka cgraph_node. */ |
| |
| template <> |
| template <> |
| inline bool |
| is_a_helper <cgraph_node *>::test (symtab_node *p) |
| { |
| return p && p->type == SYMTAB_FUNCTION; |
| } |
| |
| /* Report whether or not THIS symtab node is a variable, aka varpool_node. */ |
| |
| template <> |
| template <> |
| inline bool |
| is_a_helper <varpool_node *>::test (symtab_node *p) |
| { |
| return p && p->type == SYMTAB_VARIABLE; |
| } |
| |
| typedef void (*cgraph_edge_hook)(cgraph_edge *, void *); |
| typedef void (*cgraph_node_hook)(cgraph_node *, void *); |
| typedef void (*varpool_node_hook)(varpool_node *, void *); |
| typedef void (*cgraph_2edge_hook)(cgraph_edge *, cgraph_edge *, void *); |
| typedef void (*cgraph_2node_hook)(cgraph_node *, cgraph_node *, void *); |
| |
| struct cgraph_edge_hook_list; |
| struct cgraph_node_hook_list; |
| struct varpool_node_hook_list; |
| struct cgraph_2edge_hook_list; |
| struct cgraph_2node_hook_list; |
| |
| /* Map from a symbol to initialization/finalization priorities. */ |
| struct GTY(()) symbol_priority_map { |
| priority_type init; |
| priority_type fini; |
| }; |
| |
| enum symtab_state |
| { |
| /* Frontend is parsing and finalizing functions. */ |
| PARSING, |
| /* Callgraph is being constructed. It is safe to add new functions. */ |
| CONSTRUCTION, |
| /* Callgraph is being streamed-in at LTO time. */ |
| LTO_STREAMING, |
| /* Callgraph is built and early IPA passes are being run. */ |
| IPA, |
| /* Callgraph is built and all functions are transformed to SSA form. */ |
| IPA_SSA, |
| /* All inline decisions are done; it is now possible to remove extern inline |
| functions and virtual call targets. */ |
| IPA_SSA_AFTER_INLINING, |
| /* Functions are now ordered and being passed to RTL expanders. */ |
| EXPANSION, |
| /* All cgraph expansion is done. */ |
| FINISHED |
| }; |
| |
| struct asmname_hasher : ggc_ptr_hash <symtab_node> |
| { |
| typedef const_tree compare_type; |
| |
| static hashval_t hash (symtab_node *n); |
| static bool equal (symtab_node *n, const_tree t); |
| }; |
| |
| class GTY((tag ("SYMTAB"))) symbol_table |
| { |
| public: |
| friend struct symtab_node; |
| friend struct cgraph_node; |
| friend struct cgraph_edge; |
| |
| symbol_table (): |
| cgraph_count (0), cgraph_max_uid (1), cgraph_max_summary_id (0), |
| edges_count (0), edges_max_uid (1), edges_max_summary_id (0), |
| cgraph_released_summary_ids (), edge_released_summary_ids (), |
| nodes (NULL), asmnodes (NULL), asm_last_node (NULL), |
| order (0), max_unit (0), global_info_ready (false), state (PARSING), |
| function_flags_ready (false), cpp_implicit_aliases_done (false), |
| section_hash (NULL), assembler_name_hash (NULL), init_priority_hash (NULL), |
| dump_file (NULL), ipa_clones_dump_file (NULL), cloned_nodes (), |
| m_first_edge_removal_hook (NULL), m_first_cgraph_removal_hook (NULL), |
| m_first_edge_duplicated_hook (NULL), m_first_cgraph_duplicated_hook (NULL), |
| m_first_cgraph_insertion_hook (NULL), m_first_varpool_insertion_hook (NULL), |
| m_first_varpool_removal_hook (NULL) |
| { |
| } |
| |
| /* Initialize callgraph dump file. */ |
| void initialize (void); |
| |
| /* Register a top-level asm statement ASM_STR. */ |
| inline asm_node *finalize_toplevel_asm (tree asm_str); |
| |
| /* Analyze the whole compilation unit once it is parsed completely. */ |
| void finalize_compilation_unit (void); |
| |
| /* C++ frontend produce same body aliases all over the place, even before PCH |
| gets streamed out. It relies on us linking the aliases with their function |
| in order to do the fixups, but ipa-ref is not PCH safe. Consequently we |
| first produce aliases without links, but once C++ FE is sure it won't |
| stream PCH we build the links via this function. */ |
| void process_same_body_aliases (void); |
| |
| /* Perform simple optimizations based on callgraph. */ |
| void compile (void); |
| |
| /* Process CGRAPH_NEW_FUNCTIONS and perform actions necessary to add these |
| functions into callgraph in a way so they look like ordinary reachable |
| functions inserted into callgraph already at construction time. */ |
| void process_new_functions (void); |
| |
| /* Once all functions from compilation unit are in memory, produce all clones |
| and update all calls. We might also do this on demand if we don't want to |
| bring all functions to memory prior compilation, but current WHOPR |
| implementation does that and it is bit easier to keep everything right |
| in this order. */ |
| void materialize_all_clones (void); |
| |
| /* Register a symbol NODE. */ |
| inline void register_symbol (symtab_node *node); |
| |
| inline void |
| clear_asm_symbols (void) |
| { |
| asmnodes = NULL; |
| asm_last_node = NULL; |
| } |
| |
| /* Perform reachability analysis and reclaim all unreachable nodes. */ |
| bool remove_unreachable_nodes (FILE *file); |
| |
| /* Optimization of function bodies might've rendered some variables as |
| unnecessary so we want to avoid these from being compiled. Re-do |
| reachability starting from variables that are either externally visible |
| or was referred from the asm output routines. */ |
| void remove_unreferenced_decls (void); |
| |
| /* Unregister a symbol NODE. */ |
| inline void unregister (symtab_node *node); |
| |
| /* Allocate new callgraph node and insert it into basic data structures. */ |
| cgraph_node *create_empty (void); |
| |
| /* Release a callgraph NODE. */ |
| void release_symbol (cgraph_node *node); |
| |
| /* Output all variables enqueued to be assembled. */ |
| bool output_variables (void); |
| |
| /* Weakrefs may be associated to external decls and thus not output |
| at expansion time. Emit all necessary aliases. */ |
| void output_weakrefs (void); |
| |
| /* Return first static symbol with definition. */ |
| inline symtab_node *first_symbol (void); |
| |
| /* Return first assembler symbol. */ |
| inline asm_node * |
| first_asm_symbol (void) |
| { |
| return asmnodes; |
| } |
| |
| /* Return first static symbol with definition. */ |
| inline symtab_node *first_defined_symbol (void); |
| |
| /* Return first variable. */ |
| inline varpool_node *first_variable (void); |
| |
| /* Return next variable after NODE. */ |
| inline varpool_node *next_variable (varpool_node *node); |
| |
| /* Return first static variable with initializer. */ |
| inline varpool_node *first_static_initializer (void); |
| |
| /* Return next static variable with initializer after NODE. */ |
| inline varpool_node *next_static_initializer (varpool_node *node); |
| |
| /* Return first static variable with definition. */ |
| inline varpool_node *first_defined_variable (void); |
| |
| /* Return next static variable with definition after NODE. */ |
| inline varpool_node *next_defined_variable (varpool_node *node); |
| |
| /* Return first function with body defined. */ |
| inline cgraph_node *first_defined_function (void); |
| |
| /* Return next function with body defined after NODE. */ |
| inline cgraph_node *next_defined_function (cgraph_node *node); |
| |
| /* Return first function. */ |
| inline cgraph_node *first_function (void); |
| |
| /* Return next function. */ |
| inline cgraph_node *next_function (cgraph_node *node); |
| |
| /* Return first function with body defined. */ |
| cgraph_node *first_function_with_gimple_body (void); |
| |
| /* Return next reachable static variable with initializer after NODE. */ |
| inline cgraph_node *next_function_with_gimple_body (cgraph_node *node); |
| |
| /* Register HOOK to be called with DATA on each removed edge. */ |
| cgraph_edge_hook_list *add_edge_removal_hook (cgraph_edge_hook hook, |
| void *data); |
| |
| /* Remove ENTRY from the list of hooks called on removing edges. */ |
| void remove_edge_removal_hook (cgraph_edge_hook_list *entry); |
| |
| /* Register HOOK to be called with DATA on each removed node. */ |
| cgraph_node_hook_list *add_cgraph_removal_hook (cgraph_node_hook hook, |
| void *data); |
| |
| /* Remove ENTRY from the list of hooks called on removing nodes. */ |
| void remove_cgraph_removal_hook (cgraph_node_hook_list *entry); |
| |
| /* Register HOOK to be called with DATA on each removed node. */ |
| varpool_node_hook_list *add_varpool_removal_hook (varpool_node_hook hook, |
| void *data); |
| |
| /* Remove ENTRY from the list of hooks called on removing nodes. */ |
| void remove_varpool_removal_hook (varpool_node_hook_list *entry); |
| |
| /* Register HOOK to be called with DATA on each inserted node. */ |
| cgraph_node_hook_list *add_cgraph_insertion_hook (cgraph_node_hook hook, |
| void *data); |
| |
| /* Remove ENTRY from the list of hooks called on inserted nodes. */ |
| void remove_cgraph_insertion_hook (cgraph_node_hook_list *entry); |
| |
| /* Register HOOK to be called with DATA on each inserted node. */ |
| varpool_node_hook_list *add_varpool_insertion_hook (varpool_node_hook hook, |
| void *data); |
| |
| /* Remove ENTRY from the list of hooks called on inserted nodes. */ |
| void remove_varpool_insertion_hook (varpool_node_hook_list *entry); |
| |
| /* Register HOOK to be called with DATA on each duplicated edge. */ |
| cgraph_2edge_hook_list *add_edge_duplication_hook (cgraph_2edge_hook hook, |
| void *data); |
| /* Remove ENTRY from the list of hooks called on duplicating edges. */ |
| void remove_edge_duplication_hook (cgraph_2edge_hook_list *entry); |
| |
| /* Register HOOK to be called with DATA on each duplicated node. */ |
| cgraph_2node_hook_list *add_cgraph_duplication_hook (cgraph_2node_hook hook, |
| void *data); |
| |
| /* Remove ENTRY from the list of hooks called on duplicating nodes. */ |
| void remove_cgraph_duplication_hook (cgraph_2node_hook_list *entry); |
| |
| /* Call all edge removal hooks. */ |
| void call_edge_removal_hooks (cgraph_edge *e); |
| |
| /* Call all node insertion hooks. */ |
| void call_cgraph_insertion_hooks (cgraph_node *node); |
| |
| /* Call all node removal hooks. */ |
| void call_cgraph_removal_hooks (cgraph_node *node); |
| |
| /* Call all node duplication hooks. */ |
| void call_cgraph_duplication_hooks (cgraph_node *node, cgraph_node *node2); |
| |
| /* Call all edge duplication hooks. */ |
| void call_edge_duplication_hooks (cgraph_edge *cs1, cgraph_edge *cs2); |
| |
| /* Call all node removal hooks. */ |
| void call_varpool_removal_hooks (varpool_node *node); |
| |
| /* Call all node insertion hooks. */ |
| void call_varpool_insertion_hooks (varpool_node *node); |
| |
| /* Arrange node to be first in its entry of assembler_name_hash. */ |
| void symtab_prevail_in_asm_name_hash (symtab_node *node); |
| |
| /* Initialize asm name hash unless. */ |
| void symtab_initialize_asm_name_hash (void); |
| |
| /* Set the DECL_ASSEMBLER_NAME and update symtab hashtables. */ |
| void change_decl_assembler_name (tree decl, tree name); |
| |
| /* Dump symbol table to F. */ |
| void dump (FILE *f); |
| |
| /* Dump symbol table to F in graphviz format. */ |
| void dump_graphviz (FILE *f); |
| |
| /* Dump symbol table to stderr. */ |
| void DEBUG_FUNCTION debug (void); |
| |
| /* Assign a new summary ID for the callgraph NODE. */ |
| inline int assign_summary_id (cgraph_node *node) |
| { |
| if (!cgraph_released_summary_ids.is_empty ()) |
| node->m_summary_id = cgraph_released_summary_ids.pop (); |
| else |
| node->m_summary_id = cgraph_max_summary_id++; |
| |
| return node->m_summary_id; |
| } |
| |
| /* Assign a new summary ID for the callgraph EDGE. */ |
| inline int assign_summary_id (cgraph_edge *edge) |
| { |
| if (!edge_released_summary_ids.is_empty ()) |
| edge->m_summary_id = edge_released_summary_ids.pop (); |
| else |
| edge->m_summary_id = edges_max_summary_id++; |
| |
| return edge->m_summary_id; |
| } |
| |
| /* Return true if assembler names NAME1 and NAME2 leads to the same symbol |
| name. */ |
| static bool assembler_names_equal_p (const char *name1, const char *name2); |
| |
| int cgraph_count; |
| int cgraph_max_uid; |
| int cgraph_max_summary_id; |
| |
| int edges_count; |
| int edges_max_uid; |
| int edges_max_summary_id; |
| |
| /* Vector of released summary IDS for cgraph nodes. */ |
| vec<int> GTY ((skip)) cgraph_released_summary_ids; |
| |
| /* Vector of released summary IDS for cgraph nodes. */ |
| vec<int> GTY ((skip)) edge_released_summary_ids; |
| |
| /* Return symbol used to separate symbol name from suffix. */ |
| static char symbol_suffix_separator (); |
| |
| symtab_node* GTY(()) nodes; |
| asm_node* GTY(()) asmnodes; |
| asm_node* GTY(()) asm_last_node; |
| |
| /* The order index of the next symtab node to be created. This is |
| used so that we can sort the cgraph nodes in order by when we saw |
| them, to support -fno-toplevel-reorder. */ |
| int order; |
| |
| /* Maximal unit ID used. */ |
| int max_unit; |
| |
| /* Set when whole unit has been analyzed so we can access global info. */ |
| bool global_info_ready; |
| /* What state callgraph is in right now. */ |
| enum symtab_state state; |
| /* Set when the cgraph is fully build and the basic flags are computed. */ |
| bool function_flags_ready; |
| |
| bool cpp_implicit_aliases_done; |
| |
| /* Hash table used to hold sections. */ |
| hash_table<section_name_hasher> *GTY(()) section_hash; |
| |
| /* Hash table used to convert assembler names into nodes. */ |
| hash_table<asmname_hasher> *assembler_name_hash; |
| |
| /* Hash table used to hold init priorities. */ |
| hash_map<symtab_node *, symbol_priority_map> *init_priority_hash; |
| |
| FILE* GTY ((skip)) dump_file; |
| |
| FILE* GTY ((skip)) ipa_clones_dump_file; |
| |
| hash_set <const cgraph_node *> GTY ((skip)) cloned_nodes; |
| |
| private: |
| /* Allocate a cgraph_edge structure and fill it with data according to the |
| parameters of which only CALLEE can be NULL (when creating an indirect |
| call edge). CLONING_P should be set if properties that are copied from an |
| original edge should not be calculated. */ |
| cgraph_edge *create_edge (cgraph_node *caller, cgraph_node *callee, |
| gcall *call_stmt, profile_count count, |
| bool indir_unknown_callee, bool cloning_p); |
| |
| /* Put the edge onto the free list. */ |
| void free_edge (cgraph_edge *e); |
| |
| /* Insert NODE to assembler name hash. */ |
| void insert_to_assembler_name_hash (symtab_node *node, bool with_clones); |
| |
| /* Remove NODE from assembler name hash. */ |
| void unlink_from_assembler_name_hash (symtab_node *node, bool with_clones); |
| |
| /* Hash asmnames ignoring the user specified marks. */ |
| static hashval_t decl_assembler_name_hash (const_tree asmname); |
| |
| /* Compare ASMNAME with the DECL_ASSEMBLER_NAME of DECL. */ |
| static bool decl_assembler_name_equal (tree decl, const_tree asmname); |
| |
| friend struct asmname_hasher; |
| |
| /* List of hooks triggered when an edge is removed. */ |
| cgraph_edge_hook_list * GTY((skip)) m_first_edge_removal_hook; |
| /* List of hooks trigger_red when a cgraph node is removed. */ |
| cgraph_node_hook_list * GTY((skip)) m_first_cgraph_removal_hook; |
| /* List of hooks triggered when an edge is duplicated. */ |
| cgraph_2edge_hook_list * GTY((skip)) m_first_edge_duplicated_hook; |
| /* List of hooks triggered when a node is duplicated. */ |
| cgraph_2node_hook_list * GTY((skip)) m_first_cgraph_duplicated_hook; |
| /* List of hooks triggered when an function is inserted. */ |
| cgraph_node_hook_list * GTY((skip)) m_first_cgraph_insertion_hook; |
| /* List of hooks triggered when an variable is inserted. */ |
| varpool_node_hook_list * GTY((skip)) m_first_varpool_insertion_hook; |
| /* List of hooks triggered when a node is removed. */ |
| varpool_node_hook_list * GTY((skip)) m_first_varpool_removal_hook; |
| }; |
| |
| extern GTY(()) symbol_table *symtab; |
| |
| extern vec<cgraph_node *> cgraph_new_nodes; |
| |
| inline hashval_t |
| asmname_hasher::hash (symtab_node *n) |
| { |
| return symbol_table::decl_assembler_name_hash |
| (DECL_ASSEMBLER_NAME (n->decl)); |
| } |
| |
| inline bool |
| asmname_hasher::equal (symtab_node *n, const_tree t) |
| { |
| return symbol_table::decl_assembler_name_equal (n->decl, t); |
| } |
| |
| /* In cgraph.c */ |
| void cgraph_c_finalize (void); |
| void release_function_body (tree); |
| cgraph_indirect_call_info *cgraph_allocate_init_indirect_info (void); |
| |
| void cgraph_update_edges_for_call_stmt (gimple *, tree, gimple *); |
| bool cgraph_function_possibly_inlined_p (tree); |
| |
| const char* cgraph_inline_failed_string (cgraph_inline_failed_t); |
| cgraph_inline_failed_type_t cgraph_inline_failed_type (cgraph_inline_failed_t); |
| |
| /* In cgraphunit.c */ |
| void cgraphunit_c_finalize (void); |
| int tp_first_run_node_cmp (const void *pa, const void *pb); |
| |
| /* Initialize datastructures so DECL is a function in lowered gimple form. |
| IN_SSA is true if the gimple is in SSA. */ |
| basic_block init_lowered_empty_function (tree, bool, profile_count); |
| |
| tree thunk_adjust (gimple_stmt_iterator *, tree, bool, HOST_WIDE_INT, tree, |
| HOST_WIDE_INT); |
| /* In cgraphclones.c */ |
| |
| tree clone_function_name_numbered (const char *name, const char *suffix); |
| tree clone_function_name_numbered (tree decl, const char *suffix); |
| tree clone_function_name (const char *name, const char *suffix, |
| unsigned long number); |
| tree clone_function_name (tree decl, const char *suffix, |
| unsigned long number); |
| tree clone_function_name (tree decl, const char *suffix); |
| |
| void tree_function_versioning (tree, tree, vec<ipa_replace_map *, va_gc> *, |
| ipa_param_adjustments *, |
| bool, bitmap, basic_block); |
| |
| void dump_callgraph_transformation (const cgraph_node *original, |
| const cgraph_node *clone, |
| const char *suffix); |
| /* In cgraphbuild.c */ |
| int compute_call_stmt_bb_frequency (tree, basic_block bb); |
| void record_references_in_initializer (tree, bool); |
| |
| /* In ipa.c */ |
| void cgraph_build_static_cdtor (char which, tree body, int priority); |
| bool ipa_discover_variable_flags (void); |
| |
| /* In varpool.c */ |
| tree ctor_for_folding (tree); |
| |
| /* In ipa-inline-analysis.c */ |
| void initialize_inline_failed (struct cgraph_edge *); |
| bool speculation_useful_p (struct cgraph_edge *e, bool anticipate_inlining); |
| |
| /* Return true when the symbol is real symbol, i.e. it is not inline clone |
| or abstract function kept for debug info purposes only. */ |
| inline bool |
| symtab_node::real_symbol_p (void) |
| { |
| cgraph_node *cnode; |
| |
| if (DECL_ABSTRACT_P (decl)) |
| return false; |
| if (transparent_alias && definition) |
| return false; |
| if (!is_a <cgraph_node *> (this)) |
| return true; |
| cnode = dyn_cast <cgraph_node *> (this); |
| if (cnode->inlined_to) |
| return false; |
| return true; |
| } |
| |
| /* Return true if DECL should have entry in symbol table if used. |
| Those are functions and static & external variables. */ |
| |
| static inline bool |
| decl_in_symtab_p (const_tree decl) |
| { |
| return (TREE_CODE (decl) == FUNCTION_DECL |
| || (TREE_CODE (decl) == VAR_DECL |
| && (TREE_STATIC (decl) || DECL_EXTERNAL (decl)))); |
| } |
| |
| inline bool |
| symtab_node::in_same_comdat_group_p (symtab_node *target) |
| { |
| symtab_node *source = this; |
| |
| if (cgraph_node *cn = dyn_cast <cgraph_node *> (target)) |
| { |
| if (cn->inlined_to) |
| source = cn->inlined_to; |
| } |
| if (cgraph_node *cn = dyn_cast <cgraph_node *> (target)) |
| { |
| if (cn->inlined_to) |
| target = cn->inlined_to; |
| } |
| |
| return source->get_comdat_group () == target->get_comdat_group (); |
| } |
| |
| /* Return node that alias is aliasing. */ |
| |
| inline symtab_node * |
| symtab_node::get_alias_target (void) |
| { |
| ipa_ref *ref = NULL; |
| iterate_reference (0, ref); |
| gcc_checking_assert (ref->use == IPA_REF_ALIAS); |
| return ref->referred; |
| } |
| |
| /* Return the DECL (or identifier) that alias is aliasing. Unlike the above, |
| this works whether or not the alias has been analyzed already. */ |
| |
| inline tree |
| symtab_node::get_alias_target_tree () |
| { |
| if (alias_target) |
| return alias_target; |
| return get_alias_target ()->decl; |
| } |
| |
| /* Return next reachable static symbol with initializer after the node. */ |
| |
| inline symtab_node * |
| symtab_node::next_defined_symbol (void) |
| { |
| symtab_node *node1 = next; |
| |
| for (; node1; node1 = node1->next) |
| if (node1->definition) |
| return node1; |
| |
| return NULL; |
| } |
| |
| /* Iterates I-th reference in the list, REF is also set. */ |
| |
| inline ipa_ref * |
| symtab_node::iterate_reference (unsigned i, ipa_ref *&ref) |
| { |
| vec_safe_iterate (ref_list.references, i, &ref); |
| |
| return ref; |
| } |
| |
| /* Iterates I-th referring item in the list, REF is also set. */ |
| |
| inline ipa_ref * |
| symtab_node::iterate_referring (unsigned i, ipa_ref *&ref) |
| { |
| ref_list.referring.iterate (i, &ref); |
| |
| return ref; |
| } |
| |
| /* Iterates I-th referring alias item in the list, REF is also set. */ |
| |
| inline ipa_ref * |
| symtab_node::iterate_direct_aliases (unsigned i, ipa_ref *&ref) |
| { |
| ref_list.referring.iterate (i, &ref); |
| |
| if (ref && ref->use != IPA_REF_ALIAS) |
| return NULL; |
| |
| return ref; |
| } |
| |
| /* Return true if list contains an alias. */ |
| |
| inline bool |
| symtab_node::has_aliases_p (void) |
| { |
| ipa_ref *ref = NULL; |
| |
| return (iterate_direct_aliases (0, ref) != NULL); |
| } |
| |
| /* Return true when RESOLUTION indicate that linker will use |
| the symbol from non-LTO object files. */ |
| |
| inline bool |
| resolution_used_from_other_file_p (enum ld_plugin_symbol_resolution resolution) |
| { |
| return (resolution == LDPR_PREVAILING_DEF |
| || resolution == LDPR_PREEMPTED_REG |
| || resolution == LDPR_RESOLVED_EXEC |
| || resolution == LDPR_RESOLVED_DYN); |
| } |
| |
| /* Return true when symtab_node is known to be used from other (non-LTO) |
| object file. Known only when doing LTO via linker plugin. */ |
| |
| inline bool |
| symtab_node::used_from_object_file_p (void) |
| { |
| if (!TREE_PUBLIC (decl) || DECL_EXTERNAL (decl)) |
| return false; |
| if (resolution_used_from_other_file_p (resolution)) |
| return true; |
| return false; |
| } |
| |
| /* Return varpool node for given symbol and check it is a function. */ |
| |
| inline varpool_node * |
| varpool_node::get (const_tree decl) |
| { |
| gcc_checking_assert (TREE_CODE (decl) == VAR_DECL); |
| return dyn_cast<varpool_node *> (symtab_node::get (decl)); |
| } |
| |
| /* Register a symbol NODE. */ |
| |
| inline void |
| symbol_table::register_symbol (symtab_node *node) |
| { |
| node->next = nodes; |
| node->previous = NULL; |
| |
| if (nodes) |
| nodes->previous = node; |
| nodes = node; |
| |
| node->order = order++; |
| } |
| |
| /* Register a top-level asm statement ASM_STR. */ |
| |
| asm_node * |
| symbol_table::finalize_toplevel_asm (tree asm_str) |
| { |
| asm_node *node; |
| |
| node = ggc_cleared_alloc<asm_node> (); |
| node->asm_str = asm_str; |
| node->order = order++; |
| node->next = NULL; |
| |
| if (asmnodes == NULL) |
| asmnodes = node; |
| else |
| asm_last_node->next = node; |
| |
| asm_last_node = node; |
| return node; |
| } |
| |
| /* Unregister a symbol NODE. */ |
| inline void |
| symbol_table::unregister (symtab_node *node) |
| { |
| if (node->previous) |
| node->previous->next = node->next; |
| else |
| nodes = node->next; |
| |
| if (node->next) |
| node->next->previous = node->previous; |
| |
| node->next = NULL; |
| node->previous = NULL; |
| } |
| |
| /* Release a callgraph NODE with UID and put in to the list of free nodes. */ |
| |
| inline void |
| symbol_table::release_symbol (cgraph_node *node) |
| { |
| cgraph_count--; |
| if (node->m_summary_id != -1) |
| cgraph_released_summary_ids.safe_push (node->m_summary_id); |
| ggc_free (node); |
| } |
| |
| /* Return first static symbol with definition. */ |
| inline symtab_node * |
| symbol_table::first_symbol (void) |
| { |
| return nodes; |
| } |
| |
| /* Walk all symbols. */ |
| #define FOR_EACH_SYMBOL(node) \ |
| for ((node) = symtab->first_symbol (); (node); (node) = (node)->next) |
| |
| /* Return first static symbol with definition. */ |
| inline symtab_node * |
| symbol_table::first_defined_symbol (void) |
| { |
| symtab_node *node; |
| |
| for (node = nodes; node; node = node->next) |
| if (node->definition) |
| return node; |
| |
| return NULL; |
| } |
| |
| /* Walk all symbols with definitions in current unit. */ |
| #define FOR_EACH_DEFINED_SYMBOL(node) \ |
| for ((node) = symtab->first_defined_symbol (); (node); \ |
| (node) = node->next_defined_symbol ()) |
| |
| /* Return first variable. */ |
| inline varpool_node * |
| symbol_table::first_variable (void) |
| { |
| symtab_node *node; |
| for (node = nodes; node; node = node->next) |
| if (varpool_node *vnode = dyn_cast <varpool_node *> (node)) |
| return vnode; |
| return NULL; |
| } |
| |
| /* Return next variable after NODE. */ |
| inline varpool_node * |
| symbol_table::next_variable (varpool_node *node) |
| { |
| symtab_node *node1 = node->next; |
| for (; node1; node1 = node1->next) |
| if (varpool_node *vnode1 = dyn_cast <varpool_node *> (node1)) |
| return vnode1; |
| return NULL; |
| } |
| /* Walk all variables. */ |
| #define FOR_EACH_VARIABLE(node) \ |
| for ((node) = symtab->first_variable (); \ |
| (node); \ |
| (node) = symtab->next_variable ((node))) |
| |
| /* Return first static variable with initializer. */ |
| inline varpool_node * |
| symbol_table::first_static_initializer (void) |
| { |
| symtab_node *node; |
| for (node = nodes; node; node = node->next) |
| { |
| varpool_node *vnode = dyn_cast <varpool_node *> (node); |
| if (vnode && DECL_INITIAL (node->decl)) |
| return vnode; |
| } |
| return NULL; |
| } |
| |
| /* Return next static variable with initializer after NODE. */ |
| inline varpool_node * |
| symbol_table::next_static_initializer (varpool_node *node) |
| { |
| symtab_node *node1 = node->next; |
| for (; node1; node1 = node1->next) |
| { |
| varpool_node *vnode1 = dyn_cast <varpool_node *> (node1); |
| if (vnode1 && DECL_INITIAL (node1->decl)) |
| return vnode1; |
| } |
| return NULL; |
| } |
| |
| /* Walk all static variables with initializer set. */ |
| #define FOR_EACH_STATIC_INITIALIZER(node) \ |
| for ((node) = symtab->first_static_initializer (); (node); \ |
| (node) = symtab->next_static_initializer (node)) |
| |
| /* Return first static variable with definition. */ |
| inline varpool_node * |
| symbol_table::first_defined_variable (void) |
| { |
| symtab_node *node; |
| for (node = nodes; node; node = node->next) |
| { |
| varpool_node *vnode = dyn_cast <varpool_node *> (node); |
| if (vnode && vnode->definition) |
| return vnode; |
| } |
| return NULL; |
| } |
| |
| /* Return next static variable with definition after NODE. */ |
| inline varpool_node * |
| symbol_table::next_defined_variable (varpool_node *node) |
| { |
| symtab_node *node1 = node->next; |
| for (; node1; node1 = node1->next) |
| { |
| varpool_node *vnode1 = dyn_cast <varpool_node *> (node1); |
| if (vnode1 && vnode1->definition) |
| return vnode1; |
| } |
| return NULL; |
| } |
| /* Walk all variables with definitions in current unit. */ |
| #define FOR_EACH_DEFINED_VARIABLE(node) \ |
| for ((node) = symtab->first_defined_variable (); (node); \ |
| (node) = symtab->next_defined_variable (node)) |
| |
| /* Return first function with body defined. */ |
| inline cgraph_node * |
| symbol_table::first_defined_function (void) |
| { |
| symtab_node *node; |
| for (node = nodes; node; node = node->next) |
| { |
| cgraph_node *cn = dyn_cast <cgraph_node *> (node); |
| if (cn && cn->definition) |
| return cn; |
| } |
| return NULL; |
| } |
| |
| /* Return next function with body defined after NODE. */ |
| inline cgraph_node * |
| symbol_table::next_defined_function (cgraph_node *node) |
| { |
| symtab_node *node1 = node->next; |
| for (; node1; node1 = node1->next) |
| { |
| cgraph_node *cn1 = dyn_cast <cgraph_node *> (node1); |
| if (cn1 && cn1->definition) |
| return cn1; |
| } |
| return NULL; |
| } |
| |
| /* Walk all functions with body defined. */ |
| #define FOR_EACH_DEFINED_FUNCTION(node) \ |
| for ((node) = symtab->first_defined_function (); (node); \ |
| (node) = symtab->next_defined_function ((node))) |
| |
| /* Return first function. */ |
| inline cgraph_node * |
| symbol_table::first_function (void) |
| { |
| symtab_node *node; |
| for (node = nodes; node; node = node->next) |
| if (cgraph_node *cn = dyn_cast <cgraph_node *> (node)) |
| return cn; |
| return NULL; |
| } |
| |
| /* Return next function. */ |
| inline cgraph_node * |
| symbol_table::next_function (cgraph_node *node) |
| { |
| symtab_node *node1 = node->next; |
| for (; node1; node1 = node1->next) |
| if (cgraph_node *cn1 = dyn_cast <cgraph_node *> (node1)) |
| return cn1; |
| return NULL; |
| } |
| |
| /* Return first function with body defined. */ |
| inline cgraph_node * |
| symbol_table::first_function_with_gimple_body (void) |
| { |
| symtab_node *node; |
| for (node = nodes; node; node = node->next) |
| { |
| cgraph_node *cn = dyn_cast <cgraph_node *> (node); |
| if (cn && cn->has_gimple_body_p ()) |
| return cn; |
| } |
| return NULL; |
| } |
| |
| /* Return next reachable static variable with initializer after NODE. */ |
| inline cgraph_node * |
| symbol_table::next_function_with_gimple_body (cgraph_node *node) |
| { |
| symtab_node *node1 = node->next; |
| for (; node1; node1 = node1->next) |
| { |
| cgraph_node *cn1 = dyn_cast <cgraph_node *> (node1); |
| if (cn1 && cn1->has_gimple_body_p ()) |
| return cn1; |
| } |
| return NULL; |
| } |
| |
| /* Walk all functions. */ |
| #define FOR_EACH_FUNCTION(node) \ |
| for ((node) = symtab->first_function (); (node); \ |
| (node) = symtab->next_function ((node))) |
| |
| /* Return true when callgraph node is a function with Gimple body defined |
| in current unit. Functions can also be define externally or they |
| can be thunks with no Gimple representation. |
| |
| Note that at WPA stage, the function body may not be present in memory. */ |
| |
| inline bool |
| cgraph_node::has_gimple_body_p (void) |
| { |
| return definition && !thunk.thunk_p && !alias; |
| } |
| |
| /* Return true if this node represents a former, i.e. an expanded, thunk. */ |
| |
| inline bool |
| cgraph_node::former_thunk_p (void) |
| { |
| return (!thunk.thunk_p |
| && (thunk.fixed_offset |
| || thunk.virtual_offset_p |
| || thunk.indirect_offset)); |
| } |
| |
| /* Walk all functions with body defined. */ |
| #define FOR_EACH_FUNCTION_WITH_GIMPLE_BODY(node) \ |
| for ((node) = symtab->first_function_with_gimple_body (); (node); \ |
| (node) = symtab->next_function_with_gimple_body (node)) |
| |
| /* Uniquize all constants that appear in memory. |
| Each constant in memory thus far output is recorded |
| in `const_desc_table'. */ |
| |
| struct GTY((for_user)) constant_descriptor_tree { |
| /* A MEM for the constant. */ |
| rtx rtl; |
| |
| /* The value of the constant. */ |
| tree value; |
| |
| /* Hash of value. Computing the hash from value each time |
| hashfn is called can't work properly, as that means recursive |
| use of the hash table during hash table expansion. */ |
| hashval_t hash; |
| }; |
| |
| /* Return true when function is only called directly or it has alias. |
| i.e. it is not externally visible, address was not taken and |
| it is not used in any other non-standard way. */ |
| |
| inline bool |
| cgraph_node::only_called_directly_or_aliased_p (void) |
| { |
| gcc_assert (!inlined_to); |
| return (!force_output && !address_taken |
| && !ifunc_resolver |
| && !used_from_other_partition |
| && !DECL_VIRTUAL_P (decl) |
| && !DECL_STATIC_CONSTRUCTOR (decl) |
| && !DECL_STATIC_DESTRUCTOR (decl) |
| && !used_from_object_file_p () |
| && !externally_visible); |
| } |
| |
| /* Return true when function can be removed from callgraph |
| if all direct calls are eliminated. */ |
| |
| inline bool |
| cgraph_node::can_remove_if_no_direct_calls_and_refs_p (void) |
| { |
| gcc_checking_assert (!inlined_to); |
| /* Extern inlines can always go, we will use the external definition. */ |
| if (DECL_EXTERNAL (decl)) |
| return true; |
| /* When function is needed, we cannot remove it. */ |
| if (force_output || used_from_other_partition) |
| return false; |
| if (DECL_STATIC_CONSTRUCTOR (decl) |
| || DECL_STATIC_DESTRUCTOR (decl)) |
| return false; |
| /* Only COMDAT functions can be removed if externally visible. */ |
| if (externally_visible |
| && ((!DECL_COMDAT (decl) || ifunc_resolver) |
| || forced_by_abi |
| || used_from_object_file_p ())) |
| return false; |
| return true; |
| } |
| |
| /* Verify cgraph, if consistency checking is enabled. */ |
| |
| inline void |
| cgraph_node::checking_verify_cgraph_nodes (void) |
| { |
| if (flag_checking) |
| cgraph_node::verify_cgraph_nodes (); |
| } |
| |
| /* Return true when variable can be removed from variable pool |
| if all direct calls are eliminated. */ |
| |
| inline bool |
| varpool_node::can_remove_if_no_refs_p (void) |
| { |
| if (DECL_EXTERNAL (decl)) |
| return true; |
| return (!force_output && !used_from_other_partition |
| && ((DECL_COMDAT (decl) |
| && !forced_by_abi |
| && !used_from_object_file_p ()) |
| || !externally_visible |
| || DECL_HAS_VALUE_EXPR_P (decl))); |
| } |
| |
| /* Return true when all references to variable must be visible in ipa_ref_list. |
| i.e. if the variable is not externally visible or not used in some magic |
| way (asm statement or such). |
| The magic uses are all summarized in force_output flag. */ |
| |
| inline bool |
| varpool_node::all_refs_explicit_p () |
| { |
| return (definition |
| && !externally_visible |
| && !used_from_other_partition |
| && !force_output); |
| } |
| |
| struct tree_descriptor_hasher : ggc_ptr_hash<constant_descriptor_tree> |
| { |
| static hashval_t hash (constant_descriptor_tree *); |
| static bool equal (constant_descriptor_tree *, constant_descriptor_tree *); |
| }; |
| |
| /* Constant pool accessor function. */ |
| hash_table<tree_descriptor_hasher> *constant_pool_htab (void); |
| |
| /* Return node that alias is aliasing. */ |
| |
| inline cgraph_node * |
| cgraph_node::get_alias_target (void) |
| { |
| return dyn_cast <cgraph_node *> (symtab_node::get_alias_target ()); |
| } |
| |
| /* Return node that alias is aliasing. */ |
| |
| inline varpool_node * |
| varpool_node::get_alias_target (void) |
| { |
| return dyn_cast <varpool_node *> (symtab_node::get_alias_target ()); |
| } |
| |
| /* Walk the alias chain to return the symbol NODE is alias of. |
| If NODE is not an alias, return NODE. |
| When AVAILABILITY is non-NULL, get minimal availability in the chain. |
| When REF is non-NULL, assume that reference happens in symbol REF |
| when determining the availability. */ |
| |
| inline symtab_node * |
| symtab_node::ultimate_alias_target (enum availability *availability, |
| symtab_node *ref) |
| { |
| if (!alias) |
| { |
| if (availability) |
| *availability = get_availability (ref); |
| return this; |
| } |
| |
| return ultimate_alias_target_1 (availability, ref); |
| } |
| |
| /* Given function symbol, walk the alias chain to return the function node |
| is alias of. Do not walk through thunks. |
| When AVAILABILITY is non-NULL, get minimal availability in the chain. |
| When REF is non-NULL, assume that reference happens in symbol REF |
| when determining the availability. */ |
| |
| inline cgraph_node * |
| cgraph_node::ultimate_alias_target (enum availability *availability, |
| symtab_node *ref) |
| { |
| cgraph_node *n = dyn_cast <cgraph_node *> |
| (symtab_node::ultimate_alias_target (availability, ref)); |
| if (!n && availability) |
| *availability = AVAIL_NOT_AVAILABLE; |
| return n; |
| } |
| |
| /* For given variable pool node, walk the alias chain to return the function |
| the variable is alias of. Do not walk through thunks. |
| When AVAILABILITY is non-NULL, get minimal availability in the chain. |
| When REF is non-NULL, assume that reference happens in symbol REF |
| when determining the availability. */ |
| |
| inline varpool_node * |
| varpool_node::ultimate_alias_target (availability *availability, |
| symtab_node *ref) |
| { |
| varpool_node *n = dyn_cast <varpool_node *> |
| (symtab_node::ultimate_alias_target (availability, ref)); |
| |
| if (!n && availability) |
| *availability = AVAIL_NOT_AVAILABLE; |
| return n; |
| } |
| |
| /* Set callee N of call graph edge and add it to the corresponding set of |
| callers. */ |
| |
| inline void |
| cgraph_edge::set_callee (cgraph_node *n) |
| { |
| prev_caller = NULL; |
| if (n->callers) |
| n->callers->prev_caller = this; |
| next_caller = n->callers; |
| n->callers = this; |
| callee = n; |
| } |
| |
| /* Return true when the edge represents a direct recursion. */ |
| |
| inline bool |
| cgraph_edge::recursive_p (void) |
| { |
| cgraph_node *c = callee->ultimate_alias_target (); |
| if (caller->inlined_to) |
| return caller->inlined_to->decl == c->decl; |
| else |
| return caller->decl == c->decl; |
| } |
| |
| /* Remove the edge from the list of the callers of the callee. */ |
| |
| inline void |
| cgraph_edge::remove_callee (void) |
| { |
| gcc_assert (!indirect_unknown_callee); |
| if (prev_caller) |
| prev_caller->next_caller = next_caller; |
| if (next_caller) |
| next_caller->prev_caller = prev_caller; |
| if (!prev_caller) |
| callee->callers = next_caller; |
| } |
| |
| /* Return true if call must bind to current definition. */ |
| |
| inline bool |
| cgraph_edge::binds_to_current_def_p () |
| { |
| if (callee) |
| return callee->binds_to_current_def_p (caller); |
| else |
| return false; |
| } |
| |
| /* Expected frequency of executions within the function. |
| When set to CGRAPH_FREQ_BASE, the edge is expected to be called once |
| per function call. The range is 0 to CGRAPH_FREQ_MAX. */ |
| |
| inline int |
| cgraph_edge::frequency () |
| { |
| return count.to_cgraph_frequency (caller->inlined_to |
| ? caller->inlined_to->count |
| : caller->count); |
| } |
| |
| |
| /* Return true if the TM_CLONE bit is set for a given FNDECL. */ |
| static inline bool |
| decl_is_tm_clone (const_tree fndecl) |
| { |
| cgraph_node *n = cgraph_node::get (fndecl); |
| if (n) |
| return n->tm_clone; |
| return false; |
| } |
| |
| /* Likewise indicate that a node is needed, i.e. reachable via some |
| external means. */ |
| |
| inline void |
| cgraph_node::mark_force_output (void) |
| { |
| force_output = 1; |
| gcc_checking_assert (!inlined_to); |
| } |
| |
| /* Return true if function should be optimized for size. */ |
| |
| inline bool |
| cgraph_node::optimize_for_size_p (void) |
| { |
| if (opt_for_fn (decl, optimize_size)) |
| return true; |
| if (frequency == NODE_FREQUENCY_UNLIKELY_EXECUTED) |
| return true; |
| else |
| return false; |
| } |
| |
| /* Return symtab_node for NODE or create one if it is not present |
| in symtab. */ |
| |
| inline symtab_node * |
| symtab_node::get_create (tree node) |
| { |
| if (TREE_CODE (node) == VAR_DECL) |
| return varpool_node::get_create (node); |
| else |
| return cgraph_node::get_create (node); |
| } |
| |
| /* Return availability of NODE when referenced from REF. */ |
| |
| inline enum availability |
| symtab_node::get_availability (symtab_node *ref) |
| { |
| if (is_a <cgraph_node *> (this)) |
| return dyn_cast <cgraph_node *> (this)->get_availability (ref); |
| else |
| return dyn_cast <varpool_node *> (this)->get_availability (ref); |
| } |
| |
| /* Call callback on symtab node and aliases associated to this node. |
| When INCLUDE_OVERWRITABLE is false, overwritable symbols are skipped. */ |
| |
| inline bool |
| symtab_node::call_for_symbol_and_aliases (bool (*callback) (symtab_node *, |
| void *), |
| void *data, |
| bool include_overwritable) |
|