+++ /dev/null
-/* The lang_hooks data structure.
- Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- Free Software Foundation, Inc.
-
-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_LANG_HOOKS_H
-#define GCC_LANG_HOOKS_H
-
-/* This file should be #include-d after tree.h. */
-
-struct diagnostic_context;
-struct diagnostic_info;
-
-struct gimplify_omp_ctx;
-
-struct array_descr_info;
-
-/* A print hook for print_tree (). */
-typedef void (*lang_print_tree_hook) (FILE *, tree, int indent);
-
-enum classify_record
- { RECORD_IS_STRUCT, RECORD_IS_CLASS, RECORD_IS_INTERFACE };
-
-/* The following hooks are documented in langhooks.c. Must not be
- NULL. */
-
-struct lang_hooks_for_tree_inlining
-{
- bool (*var_mod_type_p) (tree, tree);
-};
-
-struct lang_hooks_for_callgraph
-{
- /* The node passed is a language-specific tree node. If its contents
- are relevant to use of other declarations, mark them. */
- tree (*analyze_expr) (tree *, int *);
-
- /* Emit thunks associated to function. */
- void (*emit_associated_thunks) (tree);
-};
-
-/* The following hooks are used by tree-dump.c. */
-
-struct lang_hooks_for_tree_dump
-{
- /* Dump language-specific parts of tree nodes. Returns nonzero if it
- does not want the usual dumping of the second argument. */
- bool (*dump_tree) (void *, tree);
-
- /* Determine type qualifiers in a language-specific way. */
- int (*type_quals) (const_tree);
-};
-
-/* Hooks related to types. */
-
-struct lang_hooks_for_types
-{
- /* Return a new type (with the indicated CODE), doing whatever
- language-specific processing is required. */
- tree (*make_type) (enum tree_code);
-
- /* Return what kind of RECORD_TYPE this is, mainly for purposes of
- debug information. If not defined, record types are assumed to
- be structures. */
- enum classify_record (*classify_record) (tree);
-
- /* Given MODE and UNSIGNEDP, return a suitable type-tree with that
- mode. */
- tree (*type_for_mode) (enum machine_mode, int);
-
- /* Given PRECISION and UNSIGNEDP, return a suitable type-tree for an
- integer type with at least that precision. */
- tree (*type_for_size) (unsigned, int);
-
- /* True if the type is an instantiation of a generic type,
- e.g. C++ template implicit specializations. */
- bool (*generic_p) (const_tree);
-
- /* Given a type, apply default promotions to unnamed function
- arguments and return the new type. Return the same type if no
- change. Required by any language that supports variadic
- arguments. The default hook dies. */
- tree (*type_promotes_to) (tree);
-
- /* Register TYPE as a builtin type with the indicated NAME. The
- TYPE is placed in the outermost lexical scope. The semantics
- should be analogous to:
-
- typedef TYPE NAME;
-
- in C. The default hook ignores the declaration. */
- void (*register_builtin_type) (tree, const char *);
-
- /* This routine is called in tree.c to print an error message for
- invalid use of an incomplete type. VALUE is the expression that
- was used (or 0 if that isn't known) and TYPE is the type that was
- invalid. */
- void (*incomplete_type_error) (const_tree value, const_tree type);
-
- /* Called from assign_temp to return the maximum size, if there is one,
- for a type. */
- tree (*max_size) (const_tree);
-
- /* Register language specific type size variables as potentially OpenMP
- firstprivate variables. */
- void (*omp_firstprivatize_type_sizes) (struct gimplify_omp_ctx *, tree);
-
- /* Return TRUE if TYPE1 and TYPE2 are identical for type hashing purposes.
- Called only after doing all language independent checks.
- At present, this function is only called when both TYPE1 and TYPE2 are
- FUNCTION_TYPEs. */
- bool (*type_hash_eq) (const_tree, const_tree);
-
- /* Return TRUE if TYPE uses a hidden descriptor and fills in information
- for the debugger about the array bounds, strides, etc. */
- bool (*get_array_descr_info) (const_tree, struct array_descr_info *);
-
- /* If we requested a pointer to a vector, build up the pointers that
- we stripped off while looking for the inner type. Similarly for
- return values from functions. The argument TYPE is the top of the
- chain, and BOTTOM is the new type which we will point to. */
- tree (*reconstruct_complex_type) (tree, tree);
-
- /* Nonzero if types that are identical are to be hashed so that only
- one copy is kept. If a language requires unique types for each
- user-specified type, such as Ada, this should be set to TRUE. */
- bool hash_types;
-};
-
-/* Language hooks related to decls and the symbol table. */
-
-struct lang_hooks_for_decls
-{
- /* Returns nonzero if we are in the global binding level. Ada
- returns -1 for an undocumented reason used in stor-layout.c. */
- int (*global_bindings_p) (void);
-
- /* Function to add a decl to the current scope level. Takes one
- argument, a decl to add. Returns that decl, or, if the same
- symbol is already declared, may return a different decl for that
- name. */
- tree (*pushdecl) (tree);
-
- /* Returns the chain of decls so far in the current scope level. */
- tree (*getdecls) (void);
-
- /* Returns true when we should warn for an unused global DECL.
- We will already have checked that it has static binding. */
- bool (*warn_unused_global) (const_tree);
-
- /* Obtain a list of globals and do final output on them at end
- of compilation */
- void (*final_write_globals) (void);
-
- /* True if this decl may be called via a sibcall. */
- bool (*ok_for_sibcall) (const_tree);
-
- /* Return the COMDAT group into which this DECL should be placed.
- It is known that the DECL belongs in *some* COMDAT group when
- this hook is called. The return value will be used immediately,
- but not explicitly deallocated, so implementations should not use
- xmalloc to allocate the string returned. (Typically, the return
- value will be the string already stored in an
- IDENTIFIER_NODE.) */
- const char * (*comdat_group) (tree);
-
- /* True if OpenMP should privatize what this DECL points to rather
- than the DECL itself. */
- bool (*omp_privatize_by_reference) (const_tree);
-
- /* Return sharing kind if OpenMP sharing attribute of DECL is
- predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
- enum omp_clause_default_kind (*omp_predetermined_sharing) (tree);
-
- /* Return true if DECL's DECL_VALUE_EXPR (if any) should be
- disregarded in OpenMP construct, because it is going to be
- remapped during OpenMP lowering. SHARED is true if DECL
- is going to be shared, false if it is going to be privatized. */
- bool (*omp_disregard_value_expr) (tree, bool);
-
- /* Return true if DECL that is shared iff SHARED is true should
- be put into OMP_CLAUSE_PRIVATE_DEBUG. */
- bool (*omp_private_debug_clause) (tree, bool);
-
- /* Return true if DECL in private clause needs
- OMP_CLAUSE_PRIVATE_OUTER_REF on the private clause. */
- bool (*omp_private_outer_ref) (tree);
-
- /* Build and return code for a default constructor for DECL in
- response to CLAUSE. OUTER is corresponding outer region's
- variable if needed. Return NULL if nothing to be done. */
- tree (*omp_clause_default_ctor) (tree clause, tree decl, tree outer);
-
- /* Build and return code for a copy constructor from SRC to DST. */
- tree (*omp_clause_copy_ctor) (tree clause, tree dst, tree src);
-
- /* Similarly, except use an assignment operator instead. */
- tree (*omp_clause_assign_op) (tree clause, tree dst, tree src);
-
- /* Build and return code destructing DECL. Return NULL if nothing
- to be done. */
- tree (*omp_clause_dtor) (tree clause, tree decl);
-
- /* Do language specific checking on an implicitly determined clause. */
- void (*omp_finish_clause) (tree clause);
-
- /* Return true if DECL is a global destructor. */
- bool (*is_decl_dtor) (tree decl);
-
- /* Return true if DECL is a vptr field. */
- bool (*is_vptr_field) (tree decl);
-
- /* Return true if TYPE is a polymorphic type. */
- bool (*is_type_polymorphic) (tree type);
-
- /* Return true if DECL is global delete. */
- bool (*is_global_delete_fndecl) (tree decl);
-};
-
-/* Lang hooks for LIPO. */
-
-struct lang_hooks_for_lipo
-{
- /* Add DECL to the list of predefined builtins. */
- void (*add_built_in_decl) (tree decl);
-
- /* Save the tree (by making a copy) and binding values
- for builtins before parsing start. */
- void (*save_built_in_decl_pre_parsing) (void);
-
- /* Restore builtins and their bindings to their values
- before parsing. */
- void (*restore_built_in_decl_pre_parsing) (void);
-
- /* Save the tree (by making a copy) and binding values for
- builtins after parsing of a file. */
- void (*save_built_in_decl_post_module_parsing) (void);
-
- /* Restore builtins and their bindings to their post
- parsing values. */
- void (*restore_built_in_decl_post_module_parsing) (void);
-
- /* Clear symbol binding for name ID. */
- void (*clear_global_name_bindings) (tree id);
-
- /* Return true if DECL in SCOPE is scoped in global/namespace scope,
- otherwise return false. */
- bool (*has_global_name) (tree decl, void *scope);
-
- /* Return the actual size of the lang_decl struct for
- decl T. */
- int (*get_lang_decl_size) (tree t);
-
- /* Duplicate language specific type information from SRC
- to DEST. */
- void (*dup_lang_type) (tree src, tree dest);
-
- /* Copy DEST into SRC. */
- void (*copy_lang_type) (tree src, tree dest);
-
- /* Process decls after parsing of a source module. */
- void (*process_pending_decls) (unsigned);
-
- /* Clear the list of deferred functions. */
- void (*clear_deferred_fns) (void);
-
- /* Return true if T is compiler generated. */
- bool (*is_compiler_generated_type) (tree t);
-
- /* Compare language specific types T1 and T2.
- Return 1 if they are compatible. */
- int (*cmp_lang_type) (tree t1, tree t2);
-};
-
-/* Language-specific hooks. See langhooks-def.h for defaults. */
-
-struct lang_hooks
-{
- /* String identifying the front end. e.g. "GNU C++". */
- const char *name;
-
- /* sizeof (struct lang_identifier), so make_node () creates
- identifier nodes long enough for the language-specific slots. */
- size_t identifier_size;
-
- /* Determines the size of any language-specific tcc_constant or
- tcc_exceptional nodes. Since it is called from make_node, the
- only information available is the tree code. Expected to die
- on unrecognized codes. */
- size_t (*tree_size) (enum tree_code);
-
- /* The first callback made to the front end, for simple
- initialization needed before any calls to handle_option. Return
- the language mask to filter the switch array with. */
- unsigned int (*init_options) (unsigned int argc, const char **argv);
-
- /* Callback used to perform language-specific initialization for the
- global diagnostic context structure. */
- void (*initialize_diagnostics) (struct diagnostic_context *);
-
- /* Handle the switch CODE, which has real type enum opt_code from
- options.h. If the switch takes an argument, it is passed in ARG
- which points to permanent storage. The handler is responsible for
- checking whether ARG is NULL, which indicates that no argument
- was in fact supplied. For -f and -W switches, VALUE is 1 or 0
- for the positive and negative forms respectively.
-
- Return 1 if the switch is valid, 0 if invalid, and -1 if it's
- valid and should not be treated as language-independent too. */
- int (*handle_option) (size_t code, const char *arg, int value);
-
- /* Return false to use the default complaint about a missing
- argument, otherwise output a complaint and return true. */
- bool (*missing_argument) (const char *opt, size_t code);
-
- /* Called when all command line options have been parsed to allow
- further processing and initialization
-
- Should return true to indicate that a compiler back-end is
- not required, such as with the -E option.
-
- If errorcount is nonzero after this call the compiler exits
- immediately and the finish hook is not called. */
- bool (*post_options) (const char **);
-
- /* Called after post_options to initialize the front end. Return
- false to indicate that no further compilation be performed, in
- which case the finish hook is called immediately. */
- bool (*init) (void);
-
- /* Called at the end of compilation, as a finalizer. */
- void (*finish) (void);
-
- /* Parses the entire file. The argument is nonzero to cause bison
- parsers to dump debugging information during parsing. */
- void (*parse_file) (int);
-
- /* Determines if it's ok for a function to have no noreturn attribute. */
- bool (*missing_noreturn_ok_p) (tree);
-
- /* Called to obtain the alias set to be used for an expression or type.
- Returns -1 if the language does nothing special for it. */
- alias_set_type (*get_alias_set) (tree);
-
- /* Called by expand_expr for language-specific tree codes.
- Fourth argument is actually an enum expand_modifier. */
- rtx (*expand_expr) (tree, rtx, enum machine_mode, int, rtx *);
-
- /* Function to finish handling an incomplete decl at the end of
- compilation. Default hook is does nothing. */
- void (*finish_incomplete_decl) (tree);
-
- /* Mark EXP saying that we need to be able to take the address of
- it; it should not be allocated in a register. Return true if
- successful. */
- bool (*mark_addressable) (tree);
-
- /* Hook called by staticp for language-specific tree codes. */
- tree (*staticp) (tree);
-
- /* Replace the DECL_LANG_SPECIFIC data, which may be NULL, of the
- DECL_NODE with a newly GC-allocated copy. */
- void (*dup_lang_specific_decl) (tree);
-
- /* Set the DECL_ASSEMBLER_NAME for a node. If it is the sort of
- thing that the assembler should talk about, set
- DECL_ASSEMBLER_NAME to an appropriate IDENTIFIER_NODE.
- Otherwise, set it to the ERROR_MARK_NODE to ensure that the
- assembler does not talk about it. */
- void (*set_decl_assembler_name) (tree);
-
- /* The front end can add its own statistics to -fmem-report with
- this hook. It should output to stderr. */
- void (*print_statistics) (void);
-
- /* Called by print_tree when there is a tree of class tcc_exceptional
- that it doesn't know how to display. */
- lang_print_tree_hook print_xnode;
-
- /* Called to print language-dependent parts of tcc_decl, tcc_type,
- and IDENTIFIER_NODE nodes. */
- lang_print_tree_hook print_decl;
- lang_print_tree_hook print_type;
- lang_print_tree_hook print_identifier;
-
- /* Computes the name to use to print a declaration. DECL is the
- non-NULL declaration in question. VERBOSITY determines what
- information will be printed: 0: DECL_NAME, demangled as
- necessary. 1: and scope information. 2: and any other
- information that might be interesting, such as function parameter
- types in C++. */
- const char *(*decl_printable_name) (tree decl, int verbosity);
-
- /* Computes the dwarf-2/3 name for a tree. VERBOSITY determines what
- information will be printed: 0: DECL_NAME, demangled as
- necessary. 1: and scope information. */
- const char *(*dwarf_name) (tree, int verbosity);
-
- /* This compares two types for equivalence ("compatible" in C-based languages).
- This routine should only return 1 if it is sure. It should not be used
- in contexts where erroneously returning 0 causes problems. */
- int (*types_compatible_p) (tree x, tree y);
-
- /* Called by report_error_function to print out function name. */
- void (*print_error_function) (struct diagnostic_context *, const char *,
- struct diagnostic_info *);
-
- /* Called from expr_size to calculate the size of the value of an
- expression in a language-dependent way. Returns a tree for the size
- in bytes. A frontend can call lhd_expr_size to get the default
- semantics in cases that it doesn't want to handle specially. */
- tree (*expr_size) (const_tree);
-
- /* Convert a character from the host's to the target's character
- set. The character should be in what C calls the "basic source
- character set" (roughly, the set of characters defined by plain
- old ASCII). The default is to return the character unchanged,
- which is correct in most circumstances. Note that both argument
- and result should be sign-extended under -fsigned-char,
- zero-extended under -fno-signed-char. */
- HOST_WIDE_INT (*to_target_charset) (HOST_WIDE_INT);
-
- /* Pointers to machine-independent attribute tables, for front ends
- using attribs.c. If one is NULL, it is ignored. Respectively, a
- table of attributes specific to the language, a table of
- attributes common to two or more languages (to allow easy
- sharing), and a table of attributes for checking formats. */
- const struct attribute_spec *attribute_table;
- const struct attribute_spec *common_attribute_table;
- const struct attribute_spec *format_attribute_table;
-
- struct lang_hooks_for_tree_inlining tree_inlining;
-
- struct lang_hooks_for_callgraph callgraph;
-
- struct lang_hooks_for_tree_dump tree_dump;
-
- struct lang_hooks_for_decls decls;
-
- struct lang_hooks_for_types types;
-
- struct lang_hooks_for_lipo l_ipo;
-
- /* Perform language-specific gimplification on the argument. Returns an
- enum gimplify_status, though we can't see that type here. */
- int (*gimplify_expr) (tree *, gimple_seq *, gimple_seq *);
-
- /* Return the virtual function decl for the given OBJ_TYPE_REF expression. */
- tree (*get_virtual_function_decl) (tree, tree);
-
- /* Fold an OBJ_TYPE_REF expression to the address of a function.
- KNOWN_TYPE carries the true type of the OBJ_TYPE_REF_OBJECT. */
- tree (*fold_obj_type_ref) (tree, tree);
-
- /* Determine whether the given DECL is a compiler-generated base field
- in a derived class. */
- bool (*decl_is_base_field) (tree);
-
- /* Return true if DECL is a constructor. */
- bool (*decl_is_constructor) (tree);
-
- /* Return true if DECL is a destructor. */
- bool (*decl_is_destructor) (tree);
-
- /* Do language specific processing in the builtin function DECL */
- tree (*builtin_function) (tree decl);
-
- /* Like builtin_function, but make sure the scope is the external scope.
- This is used to delay putting in back end builtin functions until the ISA
- that defines the builtin is declared via function specific target options,
- which can save memory for machines like the x86_64 that have multiple
- ISAs. If this points to the same function as builtin_function, the
- backend must add all of the builtins at program initialization time. */
- tree (*builtin_function_ext_scope) (tree decl);
-
- /* Returns true if DECL is a user defined conversion operator (C++). */
- bool (*user_conv_function_p) (tree decl);
-
- /* Used to set up the tree_contains_structure array for a frontend. */
- void (*init_ts) (void);
-
- /* Called by recompute_tree_invariant_for_addr_expr to go from EXPR
- to a contained expression or DECL, possibly updating *TC or *SE
- if in the process TREE_CONSTANT or TREE_SIDE_EFFECTS need updating. */
- tree (*expr_to_decl) (tree expr, bool *tc, bool *se);
-
- /* Whenever you add entries here, make sure you adjust langhooks-def.h
- and langhooks.c accordingly. */
-};
-
-/* Each front end provides its own. */
-extern const struct lang_hooks lang_hooks;
-extern tree add_builtin_function (const char *name, tree type,
- int function_code, enum built_in_class cl,
- const char *library_name,
- tree attrs);
-
-extern tree add_builtin_function_ext_scope (const char *name, tree type,
- int function_code,
- enum built_in_class cl,
- const char *library_name,
- tree attrs);
-
-#endif /* GCC_LANG_HOOKS_H */
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