/* The lang_hooks data structure.
- Copyright 2001 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
+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.
-GNU CC is distributed in the hope that it will be useful,
+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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+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) PARAMS ((FILE *, tree, int indent));
+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
{
- union tree_node *(*walk_subtrees) PARAMS ((union tree_node **, int *,
- union tree_node *(*)
- (union tree_node **,
- int *, void *),
- void *, void *));
- int (*cannot_inline_tree_fn) PARAMS ((union tree_node **));
- int (*disregard_inline_limits) PARAMS ((union tree_node *));
- union tree_node *(*add_pending_fn_decls) PARAMS ((void *,
- union tree_node *));
- int (*tree_chain_matters_p) PARAMS ((union tree_node *));
- int (*auto_var_in_fn_p) PARAMS ((union tree_node *, union tree_node *));
- union tree_node *(*copy_res_decl_for_inlining) PARAMS ((union tree_node *,
- union tree_node *,
- union tree_node *,
- void *, int *,
- void *));
- int (*anon_aggr_type_p) PARAMS ((union tree_node *));
- int (*start_inlining) PARAMS ((union tree_node *));
- void (*end_inlining) PARAMS ((union tree_node *));
- union tree_node *(*convert_parm_for_inlining) PARAMS ((union tree_node *,
- union tree_node *,
- union tree_node *));
+ 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 non-zero if it
+ /* Dump language-specific parts of tree nodes. Returns nonzero if it
does not want the usual dumping of the second argument. */
- int (*dump_tree) PARAMS ((void *, tree));
+ bool (*dump_tree) (void *, tree);
/* Determine type qualifiers in a language-specific way. */
- int (*type_quals) PARAMS ((tree));
+ 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);
+
+ /* 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. */
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 decode_option. */
- void (*init_options) PARAMS ((void));
-
- /* Function called with an option vector as argument, to decode a
- single option (typically starting with -f or -W or +). It should
- return the number of command-line arguments it uses if it handles
- the option, or 0 and not complain if it does not recognise the
- option. If this function returns a negative number, then its
- absolute value is the number of command-line arguments used, but,
- in addition, no language-independent option processing should be
- done for this option. */
- int (*decode_option) PARAMS ((int, char **));
-
- /* Called when all command line options have been parsed. Should do
- any required consistency checks, modifications etc. Complex
- initialization should be left to the "init" callback, since GC
- and the identifier hashes are set up between now and then. */
- void (*post_options) PARAMS ((void));
-
- /* Called after post_options, to initialize the front end. The main
- input filename is passed, which may be NULL; the front end should
- return the original filename (e.g. foo.i -> foo.c). Return NULL
- to indicate a serious error of some sort; in that case no
- compilation is performed, and the finish hook is called
- immediately. */
- const char * (*init) PARAMS ((const char *));
+ 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) PARAMS ((void));
+ void (*finish) (void);
- /* Parses the entire file. */
- void (*parse_file) PARAMS ((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) PARAMS ((void));
+ 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) PARAMS ((tree));
+ 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) PARAMS ((tree));
+ 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
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) PARAMS ((rtx, tree));
+ 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. */
- int (*staticp) PARAMS ((tree));
+ 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) PARAMS ((tree));
+ 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);
- /* Called before its argument, an UNSAVE_EXPR, is to be
- unsaved. Modify it in-place so that all the evaluate only once
- things are cleared out. */
- tree (*unsave_expr_now) PARAMS ((tree));
+ /* 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 TYPE_READONLY and TREE_READONLY should always be honored. */
- bool honor_readonly;
+ /* 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) PARAMS ((void));
+ void (*print_statistics) (void);
- /* Called by print_tree when there is a tree of class 'x' that it
- doesn't know how to display. */
+ /* 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 a class 'd', class
- 't', and IDENTIFIER_NODE nodes. */
+ /* 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;
- /* Set yydebug for bison-based parsers, when -dy is given on the
- command line. By default, if the parameter is non-zero, prints a
- warning that the front end does not use such a parser. */
- void (*set_yydebug) PARAMS ((int));
+ /* 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;
+
+ /* 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);
+
+ /* Do language specific processing in the builtin function DECL */
+ tree (*builtin_function) (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, *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);
+
/* 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);
#endif /* GCC_LANG_HOOKS_H */
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