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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/langhooks.h')
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diff --git a/gcc-4.2.1-5666.3/gcc/langhooks.h b/gcc-4.2.1-5666.3/gcc/langhooks.h new file mode 100644 index 000000000..6b17e62ad --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/langhooks.h @@ -0,0 +1,491 @@ +/* The lang_hooks data structure. + Copyright 2001, 2002, 2003, 2004, 2005, 2006 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 2, 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 COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +#ifndef GCC_LANG_HOOKS_H +#define GCC_LANG_HOOKS_H + +/* This file should be #include-d after tree.h. */ + +struct diagnostic_context; + +struct gimplify_omp_ctx; + +/* A print hook for print_tree (). */ +typedef void (*lang_print_tree_hook) (FILE *, tree, int indent); + +/* The following hooks are documented in langhooks.c. Must not be + NULL. */ + +struct lang_hooks_for_tree_inlining +{ + tree (*walk_subtrees) (tree *, int *, + tree (*) (tree *, int *, void *), + void *, struct pointer_set_t*); + int (*cannot_inline_tree_fn) (tree *); + int (*disregard_inline_limits) (tree); + tree (*add_pending_fn_decls) (void *, tree); + int (*auto_var_in_fn_p) (tree, tree); + int (*anon_aggr_type_p) (tree); + bool (*var_mod_type_p) (tree, tree); + int (*start_inlining) (tree); + void (*end_inlining) (tree); + tree (*convert_parm_for_inlining) (tree, tree, tree, int); +}; + +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 *, tree); + + /* Produce RTL for function passed as argument. */ + void (*expand_function) (tree); +}; + +/* Lang hooks for management of language-specific data or status + when entering / leaving functions etc. */ +struct lang_hooks_for_functions +{ + /* Called when entering a function. */ + void (*init) (struct function *); + + /* Called when leaving a function. */ + void (*final) (struct function *); + + /* Called when entering a nested function. */ + void (*enter_nested) (struct function *); + + /* Called when leaving a nested function. */ + void (*leave_nested) (struct function *); + + /* Determines if it's ok for a function to have no noreturn attribute. */ + bool (*missing_noreturn_ok_p) (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) (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); + + /* 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); + + /* Given an integer type T, return a type like T but unsigned. + If T is unsigned, the value is T. */ + tree (*unsigned_type) (tree); + + /* Given an integer type T, return a type like T but signed. + If T is signed, the value is T. */ + tree (*signed_type) (tree); + + /* Return a type the same as TYPE except unsigned or signed + according to UNSIGNEDP. */ + tree (*signed_or_unsigned_type) (int, 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) (tree value, tree type); + + /* Called from assign_temp to return the maximum size, if there is one, + for a type. */ + tree (*max_size) (tree); + + /* Register language specific type size variables as potentially OpenMP + firstprivate variables. */ + void (*omp_firstprivatize_type_sizes) (struct gimplify_omp_ctx *, tree); + + /* APPLE LOCAL begin radar 6386976 */ + /* Determine whether the type-tree passed in is specific to the + language/runtime definitions, e.g. is an Objective-C class... */ + bool (*is_runtime_specific_type) (tree); + /* APPLE LOCAL end radar 6386976 */ + + /* 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); + + /* Insert BLOCK at the end of the list of subblocks of the + current binding level. This is used when a BIND_EXPR is expanded, + to handle the BLOCK node inside the BIND_EXPR. */ + void (*insert_block) (tree); + + /* 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) (tree); + + /* Obtain a list of globals and do final output on them at end + of compilation */ + void (*final_write_globals) (void); + + /* Do necessary preparations before assemble_variable can proceed. */ + void (*prepare_assemble_variable) (tree); + + /* True if this decl may be called via a sibcall. */ + bool (*ok_for_sibcall) (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) (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); + + /* Build and return code for a default constructor for DECL in + response to CLAUSE. Return NULL if nothing to be done. */ + tree (*omp_clause_default_ctor) (tree clause, tree decl); + + /* 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); +}; + +/* 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); + + /* Called immediately after parsing to clear the binding stack. */ + void (*clear_binding_stack) (void); + + /* Called to obtain the alias set to be used for an expression or type. + Returns -1 if the language does nothing special for it. */ + HOST_WIDE_INT (*get_alias_set) (tree); + + /* Called with an expression that is to be processed as a constant. + Returns either the same expression or a language-independent + constant equivalent to its input. */ + tree (*expand_constant) (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 *); + + /* Called by expand_expr to generate the definition of a decl. Returns + 1 if handled, 0 otherwise. */ + int (*expand_decl) (tree); + + /* Hook called by safe_from_p for language-specific tree codes. It is + up to the language front-end to install a hook if it has any such + codes that safe_from_p needs to know about. Since same_from_p will + recursively explore the TREE_OPERANDs of an expression, this hook + should not reexamine those pieces. This routine may recursively + call safe_from_p; it should always pass `0' as the TOP_P + parameter. */ + int (*safe_from_p) (rtx, tree); + + /* 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); + + /* Return nonzero if fold-const is free to use bit-field + optimizations, for instance in fold_truthop(). */ + bool (*can_use_bit_fields_p) (void); + + /* Nonzero if operations on types narrower than their mode should + have their results reduced to the precision of the type. */ + bool reduce_bit_field_operations; + + /* Nonzero if this front end does not generate a dummy BLOCK between + the outermost scope of the function and the FUNCTION_DECL. See + is_body_block in stmt.c, and its callers. */ + bool no_body_blocks; + + /* 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); + + /* Given a CALL_EXPR, return a function decl that is its target. */ + tree (*lang_get_callee_fndecl) (tree); + + /* Called by report_error_function to print out function name. */ + void (*print_error_function) (struct diagnostic_context *, const char *); + + /* 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) (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; + + /* APPLE LOCAL begin kext identify vtables */ + int (*vtable_p) (tree); + /* APPLE LOCAL end kext identify vtables */ + + /* Function-related language hooks. */ + struct lang_hooks_for_functions function; + + 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; + + /* Perform language-specific gimplification on the argument. Returns an + enum gimplify_status, though we can't see that type here. */ + int (*gimplify_expr) (tree *, 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); + + /* Return a definition for a builtin function named NAME and whose data type + is TYPE. TYPE should be a function type with argument types. + FUNCTION_CODE tells later passes how to compile calls to this function. + See tree.h for its possible values. + + If LIBRARY_NAME is nonzero, use that for DECL_ASSEMBLER_NAME, + the name to be called if we can't opencode the function. If + ATTRS is nonzero, use that for the function's attribute list. */ + tree (*builtin_function) (const char *name, tree type, int function_code, + enum built_in_class bt_class, + const char *library_name, tree attrs); + + /* 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, *TI or + *SE if in the process TREE_CONSTANT, TREE_INVARIANT or + TREE_SIDE_EFFECTS need updating. */ + tree (*expr_to_decl) (tree expr, bool *tc, bool *ti, bool *se); + + + /* APPLE LOCAL begin radar 6353006 */ + /* For c-based languages, builds a generic type for Blocks pointers (for + emitting debug information. For other languages, returns NULL. */ + tree (*build_generic_block_struct_type) (void); + /* APPLE LOCAL end radar 6353006 */ + + /* 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; + +#endif /* GCC_LANG_HOOKS_H */ |