/* The lang_hooks data structure.
Copyright 2001, 2002 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. */
/* 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));
union tree_node *,
union tree_node *,
void *, int *,
- void *));
+ tree));
int (*anon_aggr_type_p) PARAMS ((union tree_node *));
+ bool (*var_mod_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 *));
};
+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) PARAMS ((union tree_node *));
+ /* Produce RTL for function passed as argument. */
+ void (*expand_function) PARAMS ((union tree_node *));
+};
+
+/* 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) PARAMS ((struct function *));
+
+ /* Called when leaving a function. */
+ void (*final) PARAMS ((struct function *));
+
+ /* Called when entering a nested function. */
+ void (*enter_nested) PARAMS ((struct function *));
+
+ /* Called when leaving a nested function. */
+ void (*leave_nested) PARAMS ((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) PARAMS ((void *, tree));
/* Determine type qualifiers in a language-specific way. */
int (*type_quals) PARAMS ((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) PARAMS ((enum tree_code));
+
+ /* Given MODE and UNSIGNEDP, return a suitable type-tree with that
+ mode. */
+ tree (*type_for_mode) PARAMS ((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) PARAMS ((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) PARAMS ((tree));
+
+ /* Given an integer type T, return a type like T but signed.
+ If T is signed, the value is T. */
+ tree (*signed_type) PARAMS ((tree));
+
+ /* Return a type the same as TYPE except unsigned or signed
+ according to UNSIGNEDP. */
+ tree (*signed_or_unsigned_type) PARAMS ((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) PARAMS ((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) PARAMS ((tree value, tree type));
+};
+
/* Language hooks related to decls and the symbol table. */
struct lang_hooks_for_decls
FUNCTIONBODY -- nonzero if this level is the body of a function. */
tree (*poplevel) PARAMS ((int, int, int));
- /* Returns non-zero if we are in the global binding level. Ada
+ /* 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) PARAMS ((void));
/* Returns the chain of decls so far in the current scope level. */
tree (*getdecls) PARAMS ((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) PARAMS ((tree));
+
+ /* Obtain a list of globals and do final output on them at end
+ of compilation */
+ void (*final_write_globals) PARAMS ((void));
+
+ /* True if this decl may be called via a sibcall. */
+ bool (*ok_for_sibcall) PARAMS ((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) PARAMS ((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. */
+ int (*init_options) PARAMS ((void));
+
+ /* 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 resonsible 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);
+
+ /* 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) PARAMS ((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) PARAMS ((void));
/* Called at the end of compilation, as a finalizer. */
void (*finish) PARAMS ((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) PARAMS ((int));
/* Called immediately after parsing to clear the binding stack. */
void (*clear_binding_stack) PARAMS ((void));
Fourth argument is actually an enum expand_modifier. */
rtx (*expand_expr) PARAMS ((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) PARAMS ((tree));
+
+ /* Possibly apply default attributes to a function (represented by
+ a FUNCTION_DECL). */
+ void (*insert_default_attributes) PARAMS ((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
parameter. */
int (*safe_from_p) PARAMS ((rtx, tree));
+ /* Function to finish handling an incomplete decl at the end of
+ compilation. Default hook is does nothing. */
+ void (*finish_incomplete_decl) PARAMS ((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) PARAMS ((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) PARAMS ((tree));
+
/* Hook called by staticp for language-specific tree codes. */
int (*staticp) PARAMS ((tree));
for the passed TARGET_EXPR. Return NULL if there is none. */
tree (*maybe_build_cleanup) PARAMS ((tree));
- /* Mark nodes held through the lang_specific hooks in the tree. */
- void (*mark_tree) PARAMS ((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) PARAMS ((tree));
+
+ /* Return nonzero if fold-const is free to use bit-field
+ optimizations, for instance in fold_truthop(). */
+ bool (*can_use_bit_fields_p) PARAMS ((void));
/* Nonzero if TYPE_READONLY and TREE_READONLY should always be honored. */
bool honor_readonly;
types in C++. */
const char *(*decl_printable_name) PARAMS ((tree decl, int verbosity));
- /* 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));
+ /* Called by report_error_function to print out function name. */
+ void (*print_error_function) PARAMS ((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) PARAMS ((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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