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1 | /* The lang_hooks data structure. | |
2 | Copyright (C) 2001-2019 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #ifndef GCC_LANG_HOOKS_H | |
21 | #define GCC_LANG_HOOKS_H | |
22 | ||
23 | /* FIXME: This file should be #include-d after tree.h (for enum tree_code). */ | |
24 | ||
25 | struct diagnostic_info; | |
26 | ||
27 | struct gimplify_omp_ctx; | |
28 | ||
29 | struct array_descr_info; | |
30 | ||
31 | /* A print hook for print_tree (). */ | |
32 | typedef void (*lang_print_tree_hook) (FILE *, tree, int indent); | |
33 | ||
34 | enum classify_record | |
35 | { RECORD_IS_STRUCT, RECORD_IS_CLASS, RECORD_IS_INTERFACE }; | |
36 | ||
37 | class substring_loc; | |
38 | ||
39 | /* The following hooks are documented in langhooks.c. Must not be | |
40 | NULL. */ | |
41 | ||
42 | struct lang_hooks_for_tree_inlining | |
43 | { | |
44 | bool (*var_mod_type_p) (tree, tree); | |
45 | }; | |
46 | ||
47 | /* The following hooks are used by tree-dump.c. */ | |
48 | ||
49 | struct lang_hooks_for_tree_dump | |
50 | { | |
51 | /* Dump language-specific parts of tree nodes. Returns nonzero if it | |
52 | does not want the usual dumping of the second argument. */ | |
53 | bool (*dump_tree) (void *, tree); | |
54 | ||
55 | /* Determine type qualifiers in a language-specific way. */ | |
56 | int (*type_quals) (const_tree); | |
57 | }; | |
58 | ||
59 | /* Hooks related to types. */ | |
60 | ||
61 | struct lang_hooks_for_types | |
62 | { | |
63 | /* Return a new type (with the indicated CODE), doing whatever | |
64 | language-specific processing is required. */ | |
65 | tree (*make_type) (enum tree_code); | |
66 | ||
67 | /* Return what kind of RECORD_TYPE this is, mainly for purposes of | |
68 | debug information. If not defined, record types are assumed to | |
69 | be structures. */ | |
70 | enum classify_record (*classify_record) (tree); | |
71 | ||
72 | /* Given MODE and UNSIGNEDP, return a suitable type-tree with that | |
73 | mode. */ | |
74 | tree (*type_for_mode) (machine_mode, int); | |
75 | ||
76 | /* Given PRECISION and UNSIGNEDP, return a suitable type-tree for an | |
77 | integer type with at least that precision. */ | |
78 | tree (*type_for_size) (unsigned, int); | |
79 | ||
80 | /* True if the type is an instantiation of a generic type, | |
81 | e.g. C++ template implicit specializations. */ | |
82 | bool (*generic_p) (const_tree); | |
83 | ||
84 | /* Returns the TREE_VEC of elements of a given generic argument pack. */ | |
85 | tree (*get_argument_pack_elems) (const_tree); | |
86 | ||
87 | /* Given a type, apply default promotions to unnamed function | |
88 | arguments and return the new type. Return the same type if no | |
89 | change. Required by any language that supports variadic | |
90 | arguments. The default hook dies. */ | |
91 | tree (*type_promotes_to) (tree); | |
92 | ||
93 | /* Register TYPE as a builtin type with the indicated NAME. The | |
94 | TYPE is placed in the outermost lexical scope. The semantics | |
95 | should be analogous to: | |
96 | ||
97 | typedef TYPE NAME; | |
98 | ||
99 | in C. The default hook ignores the declaration. */ | |
100 | void (*register_builtin_type) (tree, const char *); | |
101 | ||
102 | /* This routine is called in tree.c to print an error message for | |
103 | invalid use of an incomplete type. VALUE is the expression that | |
104 | was used (or 0 if that isn't known) and TYPE is the type that was | |
105 | invalid. LOC is the location of the use. */ | |
106 | void (*incomplete_type_error) (location_t loc, const_tree value, | |
107 | const_tree type); | |
108 | ||
109 | /* Called from assign_temp to return the maximum size, if there is one, | |
110 | for a type. */ | |
111 | tree (*max_size) (const_tree); | |
112 | ||
113 | /* Register language specific type size variables as potentially OpenMP | |
114 | firstprivate variables. */ | |
115 | void (*omp_firstprivatize_type_sizes) (struct gimplify_omp_ctx *, tree); | |
116 | ||
117 | /* Return true if TYPE is a mappable type. */ | |
118 | bool (*omp_mappable_type) (tree type); | |
119 | ||
120 | /* Return TRUE if TYPE1 and TYPE2 are identical for type hashing purposes. | |
121 | Called only after doing all language independent checks. | |
122 | At present, this function is only called when both TYPE1 and TYPE2 are | |
123 | FUNCTION_TYPE or METHOD_TYPE. */ | |
124 | bool (*type_hash_eq) (const_tree, const_tree); | |
125 | ||
126 | /* If non-NULL, return TYPE1 with any language-specific modifiers copied from | |
127 | TYPE2. */ | |
128 | tree (*copy_lang_qualifiers) (const_tree, const_tree); | |
129 | ||
130 | /* Return TRUE if TYPE uses a hidden descriptor and fills in information | |
131 | for the debugger about the array bounds, strides, etc. */ | |
132 | bool (*get_array_descr_info) (const_tree, struct array_descr_info *); | |
133 | ||
134 | /* Fill in information for the debugger about the bounds of TYPE. */ | |
135 | void (*get_subrange_bounds) (const_tree, tree *, tree *); | |
136 | ||
137 | /* Called on INTEGER_TYPEs. Return NULL_TREE for non-biased types. For | |
138 | biased types, return as an INTEGER_CST node the value that is represented | |
139 | by a physical zero. */ | |
140 | tree (*get_type_bias) (const_tree); | |
141 | ||
142 | /* A type descriptive of TYPE's complex layout generated to help the | |
143 | debugger to decode variable-length or self-referential constructs. | |
144 | This is only used for the AT_GNAT_descriptive_type DWARF attribute. */ | |
145 | tree (*descriptive_type) (const_tree); | |
146 | ||
147 | /* If we requested a pointer to a vector, build up the pointers that | |
148 | we stripped off while looking for the inner type. Similarly for | |
149 | return values from functions. The argument TYPE is the top of the | |
150 | chain, and BOTTOM is the new type which we will point to. */ | |
151 | tree (*reconstruct_complex_type) (tree, tree); | |
152 | ||
153 | /* Returns the tree that represents the underlying data type used to | |
154 | implement the enumeration. The default implementation will just use | |
155 | type_for_size. Used in dwarf2out.c to add a DW_AT_type base type | |
156 | reference to a DW_TAG_enumeration. */ | |
157 | tree (*enum_underlying_base_type) (const_tree); | |
158 | ||
159 | /* Return a type to use in the debug info instead of TYPE, or NULL_TREE to | |
160 | keep TYPE. This is useful to keep a single "source type" when the | |
161 | middle-end uses specialized types, for instance constrained discriminated | |
162 | types in Ada. */ | |
163 | tree (*get_debug_type) (const_tree); | |
164 | ||
165 | /* Return TRUE if TYPE implements a fixed point type and fills in information | |
166 | for the debugger about scale factor, etc. */ | |
167 | bool (*get_fixed_point_type_info) (const_tree, | |
168 | struct fixed_point_type_info *); | |
169 | ||
170 | /* Returns -1 if dwarf ATTR shouldn't be added for TYPE, or the attribute | |
171 | value otherwise. */ | |
172 | int (*type_dwarf_attribute) (const_tree, int); | |
173 | ||
174 | /* Returns a tree for the unit size of T excluding tail padding that | |
175 | might be used by objects inheriting from T. */ | |
176 | tree (*unit_size_without_reusable_padding) (tree); | |
177 | }; | |
178 | ||
179 | /* Language hooks related to decls and the symbol table. */ | |
180 | ||
181 | struct lang_hooks_for_decls | |
182 | { | |
183 | /* Return true if we are in the global binding level. This hook is really | |
184 | needed only if the language supports variable-sized types at the global | |
185 | level, i.e. declared outside subprograms. */ | |
186 | bool (*global_bindings_p) (void); | |
187 | ||
188 | /* Function to add a decl to the current scope level. Takes one | |
189 | argument, a decl to add. Returns that decl, or, if the same | |
190 | symbol is already declared, may return a different decl for that | |
191 | name. */ | |
192 | tree (*pushdecl) (tree); | |
193 | ||
194 | /* Returns the chain of decls so far in the current scope level. */ | |
195 | tree (*getdecls) (void); | |
196 | ||
197 | /* Returns -1 if dwarf ATTR shouldn't be added for DECL, or the attribute | |
198 | value otherwise. */ | |
199 | int (*decl_dwarf_attribute) (const_tree, int); | |
200 | ||
201 | /* Returns True if the parameter is a generic parameter decl | |
202 | of a generic type, e.g a template template parameter for the C++ FE. */ | |
203 | bool (*generic_generic_parameter_decl_p) (const_tree); | |
204 | ||
205 | /* Determine if a function parameter got expanded from a | |
206 | function parameter pack. */ | |
207 | bool (*function_parm_expanded_from_pack_p) (tree, tree); | |
208 | ||
209 | /* Returns the generic declaration of a generic function instantiations. */ | |
210 | tree (*get_generic_function_decl) (const_tree); | |
211 | ||
212 | /* Returns true when we should warn for an unused global DECL. | |
213 | We will already have checked that it has static binding. */ | |
214 | bool (*warn_unused_global) (const_tree); | |
215 | ||
216 | /* Perform any post compilation-proper parser cleanups and | |
217 | processing. This is currently only needed for the C++ parser, | |
218 | which hopefully can be cleaned up so this hook is no longer | |
219 | necessary. */ | |
220 | void (*post_compilation_parsing_cleanups) (void); | |
221 | ||
222 | /* True if this decl may be called via a sibcall. */ | |
223 | bool (*ok_for_sibcall) (const_tree); | |
224 | ||
225 | /* True if OpenMP should privatize what this DECL points to rather | |
226 | than the DECL itself. */ | |
227 | bool (*omp_privatize_by_reference) (const_tree); | |
228 | ||
229 | /* Return sharing kind if OpenMP sharing attribute of DECL is | |
230 | predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */ | |
231 | enum omp_clause_default_kind (*omp_predetermined_sharing) (tree); | |
232 | ||
233 | /* Return decl that should be reported for DEFAULT(NONE) failure | |
234 | diagnostics. Usually the DECL passed in. */ | |
235 | tree (*omp_report_decl) (tree); | |
236 | ||
237 | /* Return true if DECL's DECL_VALUE_EXPR (if any) should be | |
238 | disregarded in OpenMP construct, because it is going to be | |
239 | remapped during OpenMP lowering. SHARED is true if DECL | |
240 | is going to be shared, false if it is going to be privatized. */ | |
241 | bool (*omp_disregard_value_expr) (tree, bool); | |
242 | ||
243 | /* Return true if DECL that is shared iff SHARED is true should | |
244 | be put into OMP_CLAUSE_PRIVATE_DEBUG. */ | |
245 | bool (*omp_private_debug_clause) (tree, bool); | |
246 | ||
247 | /* Return true if DECL in private clause needs | |
248 | OMP_CLAUSE_PRIVATE_OUTER_REF on the private clause. */ | |
249 | bool (*omp_private_outer_ref) (tree); | |
250 | ||
251 | /* Build and return code for a default constructor for DECL in | |
252 | response to CLAUSE. OUTER is corresponding outer region's | |
253 | variable if needed. Return NULL if nothing to be done. */ | |
254 | tree (*omp_clause_default_ctor) (tree clause, tree decl, tree outer); | |
255 | ||
256 | /* Build and return code for a copy constructor from SRC to DST. */ | |
257 | tree (*omp_clause_copy_ctor) (tree clause, tree dst, tree src); | |
258 | ||
259 | /* Similarly, except use an assignment operator instead. */ | |
260 | tree (*omp_clause_assign_op) (tree clause, tree dst, tree src); | |
261 | ||
262 | /* Build and return code for a constructor of DST that sets it to | |
263 | SRC + ADD. */ | |
264 | tree (*omp_clause_linear_ctor) (tree clause, tree dst, tree src, tree add); | |
265 | ||
266 | /* Build and return code destructing DECL. Return NULL if nothing | |
267 | to be done. */ | |
268 | tree (*omp_clause_dtor) (tree clause, tree decl); | |
269 | ||
270 | /* Do language specific checking on an implicitly determined clause. */ | |
271 | void (*omp_finish_clause) (tree clause, gimple_seq *pre_p); | |
272 | ||
273 | /* Return true if DECL is a scalar variable (for the purpose of | |
274 | implicit firstprivatization). */ | |
275 | bool (*omp_scalar_p) (tree decl); | |
276 | }; | |
277 | ||
278 | /* Language hooks related to LTO serialization. */ | |
279 | ||
280 | struct lang_hooks_for_lto | |
281 | { | |
282 | /* Begin a new LTO section named NAME. */ | |
283 | void (*begin_section) (const char *name); | |
284 | ||
285 | /* Write DATA of length LEN to the currently open LTO section. BLOCK is a | |
286 | pointer to the dynamically allocated memory containing DATA. The | |
287 | append_data function is responsible for freeing it when it is no longer | |
288 | needed. */ | |
289 | void (*append_data) (const void *data, size_t len, void *block); | |
290 | ||
291 | /* End the previously begun LTO section. */ | |
292 | void (*end_section) (void); | |
293 | }; | |
294 | ||
295 | /* Language-specific hooks. See langhooks-def.h for defaults. */ | |
296 | ||
297 | struct lang_hooks | |
298 | { | |
299 | /* String identifying the front end and optionally language standard | |
300 | version, e.g. "GNU C++98". */ | |
301 | const char *name; | |
302 | ||
303 | /* sizeof (struct lang_identifier), so make_node () creates | |
304 | identifier nodes long enough for the language-specific slots. */ | |
305 | size_t identifier_size; | |
306 | ||
307 | /* Remove any parts of the tree that are used only by the FE. */ | |
308 | void (*free_lang_data) (tree); | |
309 | ||
310 | /* Determines the size of any language-specific tcc_constant, | |
311 | tcc_exceptional or tcc_type nodes. Since it is called from | |
312 | make_node, the only information available is the tree code. | |
313 | Expected to die on unrecognized codes. */ | |
314 | size_t (*tree_size) (enum tree_code); | |
315 | ||
316 | /* Return the language mask used for converting argv into a sequence | |
317 | of options. */ | |
318 | unsigned int (*option_lang_mask) (void); | |
319 | ||
320 | /* Initialize variables in an options structure. */ | |
321 | void (*init_options_struct) (struct gcc_options *opts); | |
322 | ||
323 | /* After the initialize_diagnostics hook is called, do any simple | |
324 | initialization needed before any calls to handle_option, other | |
325 | than that done by the init_options_struct hook. */ | |
326 | void (*init_options) (unsigned int decoded_options_count, | |
327 | struct cl_decoded_option *decoded_options); | |
328 | ||
329 | /* Callback used to perform language-specific initialization for the | |
330 | global diagnostic context structure. */ | |
331 | void (*initialize_diagnostics) (diagnostic_context *); | |
332 | ||
333 | /* Register language-specific dumps. */ | |
334 | void (*register_dumps) (gcc::dump_manager *); | |
335 | ||
336 | /* Return true if a warning should be given about option OPTION, | |
337 | which is for the wrong language, false if it should be quietly | |
338 | ignored. */ | |
339 | bool (*complain_wrong_lang_p) (const struct cl_option *option); | |
340 | ||
341 | /* Handle the switch CODE, which has real type enum opt_code from | |
342 | options.h. If the switch takes an argument, it is passed in ARG | |
343 | which points to permanent storage. The handler is responsible for | |
344 | checking whether ARG is NULL, which indicates that no argument | |
345 | was in fact supplied. For -f and -W switches, VALUE is 1 or 0 | |
346 | for the positive and negative forms respectively. HANDLERS should | |
347 | be passed to any recursive handle_option calls. LOC is the | |
348 | location of the option. | |
349 | ||
350 | Return true if the switch is valid, false if invalid. */ | |
351 | bool (*handle_option) (size_t code, const char *arg, HOST_WIDE_INT value, | |
352 | int kind, location_t loc, | |
353 | const struct cl_option_handlers *handlers); | |
354 | ||
355 | /* Called when all command line options have been parsed to allow | |
356 | further processing and initialization | |
357 | ||
358 | Should return true to indicate that a compiler back-end is | |
359 | not required, such as with the -E option. | |
360 | ||
361 | If errorcount is nonzero after this call the compiler exits | |
362 | immediately and the finish hook is not called. */ | |
363 | bool (*post_options) (const char **); | |
364 | ||
365 | /* Called after post_options to initialize the front end. Return | |
366 | false to indicate that no further compilation be performed, in | |
367 | which case the finish hook is called immediately. */ | |
368 | bool (*init) (void); | |
369 | ||
370 | /* Called at the end of compilation, as a finalizer. */ | |
371 | void (*finish) (void); | |
372 | ||
373 | /* Parses the entire file. */ | |
374 | void (*parse_file) (void); | |
375 | ||
376 | /* Determines if it's ok for a function to have no noreturn attribute. */ | |
377 | bool (*missing_noreturn_ok_p) (tree); | |
378 | ||
379 | /* Called to obtain the alias set to be used for an expression or type. | |
380 | Returns -1 if the language does nothing special for it. */ | |
381 | alias_set_type (*get_alias_set) (tree); | |
382 | ||
383 | /* Function to finish handling an incomplete decl at the end of | |
384 | compilation. Default hook is does nothing. */ | |
385 | void (*finish_incomplete_decl) (tree); | |
386 | ||
387 | /* Replace the DECL_LANG_SPECIFIC data, which may be NULL, of the | |
388 | DECL_NODE with a newly GC-allocated copy. */ | |
389 | void (*dup_lang_specific_decl) (tree); | |
390 | ||
391 | /* Set the DECL_ASSEMBLER_NAME for a node. If it is the sort of | |
392 | thing that the assembler should talk about, set | |
393 | DECL_ASSEMBLER_NAME to an appropriate IDENTIFIER_NODE. | |
394 | Otherwise, set it to the ERROR_MARK_NODE to ensure that the | |
395 | assembler does not talk about it. */ | |
396 | void (*set_decl_assembler_name) (tree); | |
397 | ||
398 | /* Overwrite the DECL_ASSEMBLER_NAME for a node. The name is being | |
399 | changed (including to or from NULL_TREE). */ | |
400 | void (*overwrite_decl_assembler_name) (tree, tree); | |
401 | ||
402 | /* The front end can add its own statistics to -fmem-report with | |
403 | this hook. It should output to stderr. */ | |
404 | void (*print_statistics) (void); | |
405 | ||
406 | /* Called by print_tree when there is a tree of class tcc_exceptional | |
407 | that it doesn't know how to display. */ | |
408 | lang_print_tree_hook print_xnode; | |
409 | ||
410 | /* Called to print language-dependent parts of tcc_decl, tcc_type, | |
411 | and IDENTIFIER_NODE nodes. */ | |
412 | lang_print_tree_hook print_decl; | |
413 | lang_print_tree_hook print_type; | |
414 | lang_print_tree_hook print_identifier; | |
415 | ||
416 | /* Computes the name to use to print a declaration. DECL is the | |
417 | non-NULL declaration in question. VERBOSITY determines what | |
418 | information will be printed: 0: DECL_NAME, demangled as | |
419 | necessary. 1: and scope information. 2: and any other | |
420 | information that might be interesting, such as function parameter | |
421 | types in C++. The name is in the internal character set and | |
422 | needs to be converted to the locale character set of diagnostics, | |
423 | or to the execution character set for strings such as | |
424 | __PRETTY_FUNCTION__. */ | |
425 | const char *(*decl_printable_name) (tree decl, int verbosity); | |
426 | ||
427 | /* Computes the dwarf-2/3 name for a tree. VERBOSITY determines what | |
428 | information will be printed: 0: DECL_NAME, demangled as | |
429 | necessary. 1: and scope information. */ | |
430 | const char *(*dwarf_name) (tree, int verbosity); | |
431 | ||
432 | /* This compares two types for equivalence ("compatible" in C-based languages). | |
433 | This routine should only return 1 if it is sure. It should not be used | |
434 | in contexts where erroneously returning 0 causes problems. */ | |
435 | int (*types_compatible_p) (tree x, tree y); | |
436 | ||
437 | /* Called by report_error_function to print out function name. */ | |
438 | void (*print_error_function) (diagnostic_context *, const char *, | |
439 | struct diagnostic_info *); | |
440 | ||
441 | /* Convert a character from the host's to the target's character | |
442 | set. The character should be in what C calls the "basic source | |
443 | character set" (roughly, the set of characters defined by plain | |
444 | old ASCII). The default is to return the character unchanged, | |
445 | which is correct in most circumstances. Note that both argument | |
446 | and result should be sign-extended under -fsigned-char, | |
447 | zero-extended under -fno-signed-char. */ | |
448 | HOST_WIDE_INT (*to_target_charset) (HOST_WIDE_INT); | |
449 | ||
450 | /* Pointers to machine-independent attribute tables, for front ends | |
451 | using attribs.c. If one is NULL, it is ignored. Respectively, a | |
452 | table of attributes specific to the language, a table of | |
453 | attributes common to two or more languages (to allow easy | |
454 | sharing), and a table of attributes for checking formats. */ | |
455 | const struct attribute_spec *attribute_table; | |
456 | const struct attribute_spec *common_attribute_table; | |
457 | const struct attribute_spec *format_attribute_table; | |
458 | ||
459 | struct lang_hooks_for_tree_inlining tree_inlining; | |
460 | ||
461 | struct lang_hooks_for_tree_dump tree_dump; | |
462 | ||
463 | struct lang_hooks_for_decls decls; | |
464 | ||
465 | struct lang_hooks_for_types types; | |
466 | ||
467 | struct lang_hooks_for_lto lto; | |
468 | ||
469 | /* Returns a TREE_VEC of the generic parameters of an instantiation of | |
470 | a generic type or decl, e.g. C++ template instantiation. If | |
471 | TREE_CHAIN of the return value is set, it is an INTEGER_CST | |
472 | indicating how many of the elements are non-default. */ | |
473 | tree (*get_innermost_generic_parms) (const_tree); | |
474 | ||
475 | /* Returns the TREE_VEC of arguments of an instantiation | |
476 | of a generic type of decl, e.g. C++ template instantiation. */ | |
477 | tree (*get_innermost_generic_args) (const_tree); | |
478 | ||
479 | /* Determine if a tree is a function parameter pack. */ | |
480 | bool (*function_parameter_pack_p) (const_tree); | |
481 | ||
482 | /* Perform language-specific gimplification on the argument. Returns an | |
483 | enum gimplify_status, though we can't see that type here. */ | |
484 | int (*gimplify_expr) (tree *, gimple_seq *, gimple_seq *); | |
485 | ||
486 | /* Do language specific processing in the builtin function DECL */ | |
487 | tree (*builtin_function) (tree decl); | |
488 | ||
489 | /* Like builtin_function, but make sure the scope is the external scope. | |
490 | This is used to delay putting in back end builtin functions until the ISA | |
491 | that defines the builtin is declared via function specific target options, | |
492 | which can save memory for machines like the x86_64 that have multiple | |
493 | ISAs. If this points to the same function as builtin_function, the | |
494 | backend must add all of the builtins at program initialization time. */ | |
495 | tree (*builtin_function_ext_scope) (tree decl); | |
496 | ||
497 | /* Used to set up the tree_contains_structure array for a frontend. */ | |
498 | void (*init_ts) (void); | |
499 | ||
500 | /* Called by recompute_tree_invariant_for_addr_expr to go from EXPR | |
501 | to a contained expression or DECL, possibly updating *TC or *SE | |
502 | if in the process TREE_CONSTANT or TREE_SIDE_EFFECTS need updating. */ | |
503 | tree (*expr_to_decl) (tree expr, bool *tc, bool *se); | |
504 | ||
505 | /* The EH personality function decl. */ | |
506 | tree (*eh_personality) (void); | |
507 | ||
508 | /* Map a type to a runtime object to match type. */ | |
509 | tree (*eh_runtime_type) (tree); | |
510 | ||
511 | /* If non-NULL, this is a function that returns a function decl to be | |
512 | executed if an unhandled exception is propagated out of a cleanup | |
513 | region. For example, in C++, an exception thrown by a destructor | |
514 | during stack unwinding is required to result in a call to | |
515 | `std::terminate', so the C++ version of this function returns a | |
516 | FUNCTION_DECL for `std::terminate'. */ | |
517 | tree (*eh_protect_cleanup_actions) (void); | |
518 | ||
519 | /* Return true if a stmt can fallthru. Used by block_may_fallthru | |
520 | to possibly handle language trees. */ | |
521 | bool (*block_may_fallthru) (const_tree); | |
522 | ||
523 | /* True if this language uses __cxa_end_cleanup when the ARM EABI | |
524 | is enabled. */ | |
525 | bool eh_use_cxa_end_cleanup; | |
526 | ||
527 | /* True if this language requires deep unsharing of tree nodes prior to | |
528 | gimplification. */ | |
529 | bool deep_unsharing; | |
530 | ||
531 | /* True if this language may use custom descriptors for nested functions | |
532 | instead of trampolines. */ | |
533 | bool custom_function_descriptors; | |
534 | ||
535 | /* True if this language emits begin stmt notes. */ | |
536 | bool emits_begin_stmt; | |
537 | ||
538 | /* Run all lang-specific selftests. */ | |
539 | void (*run_lang_selftests) (void); | |
540 | ||
541 | /* Attempt to determine the source location of the substring. | |
542 | If successful, return NULL and write the source location to *OUT_LOC. | |
543 | Otherwise return an error message. Error messages are intended | |
544 | for GCC developers (to help debugging) rather than for end-users. */ | |
545 | const char *(*get_substring_location) (const substring_loc &, | |
546 | location_t *out_loc); | |
547 | ||
548 | /* Whenever you add entries here, make sure you adjust langhooks-def.h | |
549 | and langhooks.c accordingly. */ | |
550 | }; | |
551 | ||
552 | /* Each front end provides its own. */ | |
553 | extern struct lang_hooks lang_hooks; | |
554 | ||
555 | extern tree add_builtin_function (const char *name, tree type, | |
556 | int function_code, enum built_in_class cl, | |
557 | const char *library_name, | |
558 | tree attrs); | |
559 | ||
560 | extern tree add_builtin_function_ext_scope (const char *name, tree type, | |
561 | int function_code, | |
562 | enum built_in_class cl, | |
563 | const char *library_name, | |
564 | tree attrs); | |
565 | extern tree add_builtin_type (const char *name, tree type); | |
566 | ||
567 | /* Language helper functions. */ | |
568 | ||
569 | extern bool lang_GNU_C (void); | |
570 | extern bool lang_GNU_CXX (void); | |
571 | extern bool lang_GNU_Fortran (void); | |
572 | extern bool lang_GNU_OBJC (void); | |
573 | ||
574 | #endif /* GCC_LANG_HOOKS_H */ |