/* The lang_hooks data structure.
- Copyright 2001 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2003 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
+along with GCC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef GCC_LANG_HOOKS_H
#define GCC_LANG_HOOKS_H
+/* This file should be #include-d after tree.h. */
+
+struct diagnostic_context;
+
/* 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 *));
+ tree (*walk_subtrees) (tree *, int *,
+ tree (*) (tree *, int *, void *),
+ void *, void *);
+ int (*cannot_inline_tree_fn) (tree *);
+ int (*disregard_inline_limits) (tree);
+ tree (*add_pending_fn_decls) (void *, tree);
+ int (*tree_chain_matters_p) (tree);
+ int (*auto_var_in_fn_p) (tree, tree);
+ tree (*copy_res_decl_for_inlining) (tree, tree, tree,
+ void *, int *, tree);
+ int (*anon_aggr_type_p) (tree);
+ bool (*var_mod_type_p) (tree);
+ int (*start_inlining) (tree);
+ void (*end_inlining) (tree);
+ tree (*convert_parm_for_inlining) (tree, tree, tree);
+ int (*estimate_num_insns) (tree);
+};
+
+struct lang_hooks_for_callgraph
+{
+ /* Function passed as argument is needed and will be compiled.
+ Lower the representation so the calls are explicit. */
+ void (*lower_function) (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 *);
};
/* 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 aborts. */
+ tree (*type_promotes_to) (tree);
+
+ /* 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);
+};
+
+/* Language hooks related to decls and the symbol table. */
+
+struct lang_hooks_for_decls
+{
+ /* Enter a new lexical scope. Argument is always zero when called
+ from outside the front end. */
+ void (*pushlevel) (int);
+
+ /* Exit a lexical scope and return a BINDING for that scope.
+ Takes three arguments:
+ KEEP -- nonzero if there were declarations in this scope.
+ REVERSE -- reverse the order of decls before returning them.
+ FUNCTIONBODY -- nonzero if this level is the body of a function. */
+ tree (*poplevel) (int, int, int);
+
+ /* 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);
+
+ /* Set the BLOCK node for the current scope level. */
+ void (*set_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);
};
/* 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 'x' or 'c' nodes.
+ Since it is called from make_node, the only information available
+ is the tree code. Expected to abort 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. 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) (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);
+
+ /* Prepare expr to be an argument of a TRUTH_NOT_EXPR or other logical
+ operation.
+
+ This preparation consists of taking the ordinary representation
+ of an expression expr and producing a valid tree boolean
+ expression describing whether expr is nonzero. We could simply
+ always do build_binary_op (NE_EXPR, expr, integer_zero_node, 1),
+ but we optimize comparisons, &&, ||, and !.
+
+ The result should be an expression of boolean type (if not an
+ error_mark_node). */
+ tree (*truthvalue_conversion) (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);
+
+ /* Function used by unsafe_for_reeval. A non-negative number is
+ returned directly from unsafe_for_reeval, a negative number falls
+ through. The default hook returns a negative number. */
+ int (*unsafe_for_reeval) (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) (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);
+
+ /* 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) (tree);
+
+ /* Called by expand_expr to build and return the cleanup-expression
+ for the passed TARGET_EXPR. Return NULL if there is none. */
+ tree (*maybe_build_cleanup) (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 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. */
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);
+
+ /* 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);
+
+ /* Called from uninitialized_vars_warning to find out if a variable is
+ uninitialized based on DECL_INITIAL. */
+ bool (*decl_uninit) (tree);
+
+ /* 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;
+
/* Whenever you add entries here, make sure you adjust langhooks-def.h
and langhooks.c accordingly. */
};
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