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d23c55c2 | 1 | /* The lang_hooks data structure. |
5624e564 | 2 | Copyright (C) 2001-2015 Free Software Foundation, Inc. |
69dcadff | 3 | |
63b025a5 | 4 | This file is part of GCC. |
69dcadff | 5 | |
63b025a5 | 6 | GCC is free software; you can redistribute it and/or modify |
69dcadff | 7 | it under the terms of the GNU General Public License as published by |
9dcd6f09 | 8 | the Free Software Foundation; either version 3, or (at your option) |
69dcadff AO |
9 | any later version. |
10 | ||
63b025a5 | 11 | GCC is distributed in the hope that it will be useful, |
69dcadff AO |
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 | |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
69dcadff AO |
19 | |
20 | #ifndef GCC_LANG_HOOKS_H | |
21 | #define GCC_LANG_HOOKS_H | |
22 | ||
532aafad | 23 | /* FIXME: This file should be #include-d after tree.h (for enum tree_code). */ |
c9d892a8 | 24 | |
c94ed7a1 | 25 | struct diagnostic_info; |
7cb32822 | 26 | |
953ff289 DN |
27 | struct gimplify_omp_ctx; |
28 | ||
fad0afd7 JJ |
29 | struct array_descr_info; |
30 | ||
5d69f816 | 31 | /* A print hook for print_tree (). */ |
0c20a65f | 32 | typedef void (*lang_print_tree_hook) (FILE *, tree, int indent); |
5d69f816 | 33 | |
394d9fe7 AO |
34 | enum classify_record |
35 | { RECORD_IS_STRUCT, RECORD_IS_CLASS, RECORD_IS_INTERFACE }; | |
36 | ||
d23c55c2 NB |
37 | /* The following hooks are documented in langhooks.c. Must not be |
38 | NULL. */ | |
39 | ||
40 | struct lang_hooks_for_tree_inlining | |
41 | { | |
5377d5ba | 42 | bool (*var_mod_type_p) (tree, tree); |
d23c55c2 NB |
43 | }; |
44 | ||
89d684bb BM |
45 | /* The following hooks are used by tree-dump.c. */ |
46 | ||
47 | struct lang_hooks_for_tree_dump | |
48 | { | |
cc2902df | 49 | /* Dump language-specific parts of tree nodes. Returns nonzero if it |
89d684bb | 50 | does not want the usual dumping of the second argument. */ |
0c20a65f | 51 | bool (*dump_tree) (void *, tree); |
89d684bb BM |
52 | |
53 | /* Determine type qualifiers in a language-specific way. */ | |
ac7d7749 | 54 | int (*type_quals) (const_tree); |
89d684bb BM |
55 | }; |
56 | ||
f1e639b1 NB |
57 | /* Hooks related to types. */ |
58 | ||
59 | struct lang_hooks_for_types | |
60 | { | |
b0c48229 NB |
61 | /* Return a new type (with the indicated CODE), doing whatever |
62 | language-specific processing is required. */ | |
0c20a65f | 63 | tree (*make_type) (enum tree_code); |
e11e816e | 64 | |
394d9fe7 AO |
65 | /* Return what kind of RECORD_TYPE this is, mainly for purposes of |
66 | debug information. If not defined, record types are assumed to | |
67 | be structures. */ | |
68 | enum classify_record (*classify_record) (tree); | |
69 | ||
b0c48229 NB |
70 | /* Given MODE and UNSIGNEDP, return a suitable type-tree with that |
71 | mode. */ | |
ef4bddc2 | 72 | tree (*type_for_mode) (machine_mode, int); |
b0c48229 NB |
73 | |
74 | /* Given PRECISION and UNSIGNEDP, return a suitable type-tree for an | |
75 | integer type with at least that precision. */ | |
0c20a65f | 76 | tree (*type_for_size) (unsigned, int); |
ceef8ce4 | 77 | |
39ef6592 LC |
78 | /* True if the type is an instantiation of a generic type, |
79 | e.g. C++ template implicit specializations. */ | |
ac7d7749 | 80 | bool (*generic_p) (const_tree); |
39ef6592 | 81 | |
f9329c35 DS |
82 | /* Returns the TREE_VEC of elements of a given generic argument pack. */ |
83 | tree (*get_argument_pack_elems) (const_tree); | |
84 | ||
ab393bf1 NB |
85 | /* Given a type, apply default promotions to unnamed function |
86 | arguments and return the new type. Return the same type if no | |
87 | change. Required by any language that supports variadic | |
0e61db61 | 88 | arguments. The default hook dies. */ |
0c20a65f | 89 | tree (*type_promotes_to) (tree); |
ab393bf1 | 90 | |
9649812a MM |
91 | /* Register TYPE as a builtin type with the indicated NAME. The |
92 | TYPE is placed in the outermost lexical scope. The semantics | |
93 | should be analogous to: | |
94 | ||
95 | typedef TYPE NAME; | |
96 | ||
97 | in C. The default hook ignores the declaration. */ | |
98 | void (*register_builtin_type) (tree, const char *); | |
99 | ||
7a228918 NB |
100 | /* This routine is called in tree.c to print an error message for |
101 | invalid use of an incomplete type. VALUE is the expression that | |
102 | was used (or 0 if that isn't known) and TYPE is the type that was | |
103 | invalid. */ | |
ac7d7749 | 104 | void (*incomplete_type_error) (const_tree value, const_tree type); |
7548281d | 105 | |
8963a517 RK |
106 | /* Called from assign_temp to return the maximum size, if there is one, |
107 | for a type. */ | |
ac7d7749 | 108 | tree (*max_size) (const_tree); |
8963a517 | 109 | |
953ff289 DN |
110 | /* Register language specific type size variables as potentially OpenMP |
111 | firstprivate variables. */ | |
112 | void (*omp_firstprivatize_type_sizes) (struct gimplify_omp_ctx *, tree); | |
113 | ||
acf0174b JJ |
114 | /* Return true if TYPE is a mappable type. */ |
115 | bool (*omp_mappable_type) (tree type); | |
116 | ||
2dff8956 JJ |
117 | /* Return TRUE if TYPE1 and TYPE2 are identical for type hashing purposes. |
118 | Called only after doing all language independent checks. | |
119 | At present, this function is only called when both TYPE1 and TYPE2 are | |
120 | FUNCTION_TYPEs. */ | |
121 | bool (*type_hash_eq) (const_tree, const_tree); | |
122 | ||
fad0afd7 JJ |
123 | /* Return TRUE if TYPE uses a hidden descriptor and fills in information |
124 | for the debugger about the array bounds, strides, etc. */ | |
125 | bool (*get_array_descr_info) (const_tree, struct array_descr_info *); | |
126 | ||
84fb43a1 EB |
127 | /* Fill in information for the debugger about the bounds of TYPE. */ |
128 | void (*get_subrange_bounds) (const_tree, tree *, tree *); | |
129 | ||
2a9d769a OH |
130 | /* A type descriptive of TYPE's complex layout generated to help the |
131 | debugger to decode variable-length or self-referential constructs. | |
132 | This is only used for the AT_GNAT_descriptive_type DWARF attribute. */ | |
133 | tree (*descriptive_type) (const_tree); | |
134 | ||
5dc11954 JJ |
135 | /* If we requested a pointer to a vector, build up the pointers that |
136 | we stripped off while looking for the inner type. Similarly for | |
137 | return values from functions. The argument TYPE is the top of the | |
138 | chain, and BOTTOM is the new type which we will point to. */ | |
139 | tree (*reconstruct_complex_type) (tree, tree); | |
7315daa6 MW |
140 | |
141 | /* Returns the tree that represents the underlying data type used to | |
142 | implement the enumeration. The default implementation will just use | |
143 | type_for_size. Used in dwarf2out.c to add a DW_AT_type base type | |
144 | reference to a DW_TAG_enumeration. */ | |
145 | tree (*enum_underlying_base_type) (const_tree); | |
f1e639b1 NB |
146 | }; |
147 | ||
43577e6b NB |
148 | /* Language hooks related to decls and the symbol table. */ |
149 | ||
150 | struct lang_hooks_for_decls | |
151 | { | |
c99c0026 EB |
152 | /* Return true if we are in the global binding level. This hook is really |
153 | needed only if the language supports variable-sized types at the global | |
154 | level, i.e. declared outside subprograms. */ | |
155 | bool (*global_bindings_p) (void); | |
43577e6b | 156 | |
43577e6b NB |
157 | /* Function to add a decl to the current scope level. Takes one |
158 | argument, a decl to add. Returns that decl, or, if the same | |
159 | symbol is already declared, may return a different decl for that | |
160 | name. */ | |
0c20a65f | 161 | tree (*pushdecl) (tree); |
43577e6b NB |
162 | |
163 | /* Returns the chain of decls so far in the current scope level. */ | |
0c20a65f | 164 | tree (*getdecls) (void); |
ef4f94ac | 165 | |
68599f33 DS |
166 | /* Returns true if DECL is explicit member function. */ |
167 | bool (*function_decl_explicit_p) (tree); | |
168 | ||
f5059223 MW |
169 | /* Returns true if DECL is C++11 deleted special member function. */ |
170 | bool (*function_decl_deleted_p) (tree); | |
171 | ||
f9329c35 DS |
172 | /* Returns True if the parameter is a generic parameter decl |
173 | of a generic type, e.g a template template parameter for the C++ FE. */ | |
174 | bool (*generic_generic_parameter_decl_p) (const_tree); | |
175 | ||
d40a19da DS |
176 | /* Determine if a function parameter got expanded from a |
177 | function parameter pack. */ | |
178 | bool (*function_parm_expanded_from_pack_p) (tree, tree); | |
179 | ||
180 | /* Returns the generic declaration of a generic function instantiations. */ | |
181 | tree (*get_generic_function_decl) (const_tree); | |
182 | ||
ef4f94ac RH |
183 | /* Returns true when we should warn for an unused global DECL. |
184 | We will already have checked that it has static binding. */ | |
ac7d7749 | 185 | bool (*warn_unused_global) (const_tree); |
2b59501b | 186 | |
d7438551 AH |
187 | /* Perform any post compilation-proper parser cleanups and |
188 | processing. This is currently only needed for the C++ parser, | |
189 | which hopefully can be cleaned up so this hook is no longer | |
190 | necessary. */ | |
191 | void (*post_compilation_parsing_cleanups) (void); | |
e076f71a AH |
192 | |
193 | /* True if this decl may be called via a sibcall. */ | |
58f9752a | 194 | bool (*ok_for_sibcall) (const_tree); |
c18a5b6c | 195 | |
953ff289 DN |
196 | /* True if OpenMP should privatize what this DECL points to rather |
197 | than the DECL itself. */ | |
58f9752a | 198 | bool (*omp_privatize_by_reference) (const_tree); |
953ff289 DN |
199 | |
200 | /* Return sharing kind if OpenMP sharing attribute of DECL is | |
201 | predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */ | |
202 | enum omp_clause_default_kind (*omp_predetermined_sharing) (tree); | |
203 | ||
79943d19 JJ |
204 | /* Return decl that should be reported for DEFAULT(NONE) failure |
205 | diagnostics. Usually the DECL passed in. */ | |
206 | tree (*omp_report_decl) (tree); | |
207 | ||
953ff289 DN |
208 | /* Return true if DECL's DECL_VALUE_EXPR (if any) should be |
209 | disregarded in OpenMP construct, because it is going to be | |
210 | remapped during OpenMP lowering. SHARED is true if DECL | |
211 | is going to be shared, false if it is going to be privatized. */ | |
212 | bool (*omp_disregard_value_expr) (tree, bool); | |
213 | ||
214 | /* Return true if DECL that is shared iff SHARED is true should | |
215 | be put into OMP_CLAUSE_PRIVATE_DEBUG. */ | |
216 | bool (*omp_private_debug_clause) (tree, bool); | |
217 | ||
a68ab351 JJ |
218 | /* Return true if DECL in private clause needs |
219 | OMP_CLAUSE_PRIVATE_OUTER_REF on the private clause. */ | |
220 | bool (*omp_private_outer_ref) (tree); | |
221 | ||
953ff289 | 222 | /* Build and return code for a default constructor for DECL in |
a68ab351 JJ |
223 | response to CLAUSE. OUTER is corresponding outer region's |
224 | variable if needed. Return NULL if nothing to be done. */ | |
225 | tree (*omp_clause_default_ctor) (tree clause, tree decl, tree outer); | |
953ff289 DN |
226 | |
227 | /* Build and return code for a copy constructor from SRC to DST. */ | |
228 | tree (*omp_clause_copy_ctor) (tree clause, tree dst, tree src); | |
229 | ||
230 | /* Similarly, except use an assignment operator instead. */ | |
231 | tree (*omp_clause_assign_op) (tree clause, tree dst, tree src); | |
232 | ||
da6f124d JJ |
233 | /* Build and return code for a constructor of DST that sets it to |
234 | SRC + ADD. */ | |
235 | tree (*omp_clause_linear_ctor) (tree clause, tree dst, tree src, tree add); | |
236 | ||
953ff289 DN |
237 | /* Build and return code destructing DECL. Return NULL if nothing |
238 | to be done. */ | |
239 | tree (*omp_clause_dtor) (tree clause, tree decl); | |
a68ab351 JJ |
240 | |
241 | /* Do language specific checking on an implicitly determined clause. */ | |
f014c653 | 242 | void (*omp_finish_clause) (tree clause, gimple_seq *pre_p); |
43577e6b NB |
243 | }; |
244 | ||
d7f09764 DN |
245 | /* Language hooks related to LTO serialization. */ |
246 | ||
247 | struct lang_hooks_for_lto | |
248 | { | |
249 | /* Begin a new LTO section named NAME. */ | |
250 | void (*begin_section) (const char *name); | |
251 | ||
252 | /* Write DATA of length LEN to the currently open LTO section. BLOCK is a | |
253 | pointer to the dynamically allocated memory containing DATA. The | |
254 | append_data function is responsible for freeing it when it is no longer | |
255 | needed. */ | |
256 | void (*append_data) (const void *data, size_t len, void *block); | |
257 | ||
258 | /* End the previously begun LTO section. */ | |
259 | void (*end_section) (void); | |
260 | }; | |
261 | ||
d23c55c2 NB |
262 | /* Language-specific hooks. See langhooks-def.h for defaults. */ |
263 | ||
264 | struct lang_hooks | |
265 | { | |
dcc97066 MW |
266 | /* String identifying the front end and optionally language standard |
267 | version, e.g. "GNU C++98" or "GNU Java". */ | |
3ac88239 NB |
268 | const char *name; |
269 | ||
270 | /* sizeof (struct lang_identifier), so make_node () creates | |
271 | identifier nodes long enough for the language-specific slots. */ | |
272 | size_t identifier_size; | |
273 | ||
4537ec0c DN |
274 | /* Remove any parts of the tree that are used only by the FE. */ |
275 | void (*free_lang_data) (tree); | |
276 | ||
6615c446 JO |
277 | /* Determines the size of any language-specific tcc_constant or |
278 | tcc_exceptional nodes. Since it is called from make_node, the | |
0e61db61 | 279 | only information available is the tree code. Expected to die |
6615c446 | 280 | on unrecognized codes. */ |
0c20a65f | 281 | size_t (*tree_size) (enum tree_code); |
d78e771d | 282 | |
7a9bf9a4 JM |
283 | /* Return the language mask used for converting argv into a sequence |
284 | of options. */ | |
285 | unsigned int (*option_lang_mask) (void); | |
286 | ||
a75bfaa6 JM |
287 | /* Initialize variables in an options structure. */ |
288 | void (*init_options_struct) (struct gcc_options *opts); | |
289 | ||
7a9bf9a4 | 290 | /* After the initialize_diagnostics hook is called, do any simple |
a75bfaa6 JM |
291 | initialization needed before any calls to handle_option, other |
292 | than that done by the init_options_struct hook. */ | |
7a9bf9a4 JM |
293 | void (*init_options) (unsigned int decoded_options_count, |
294 | struct cl_decoded_option *decoded_options); | |
d23c55c2 | 295 | |
21ecc5a7 GDR |
296 | /* Callback used to perform language-specific initialization for the |
297 | global diagnostic context structure. */ | |
1ebe4b4f | 298 | void (*initialize_diagnostics) (diagnostic_context *); |
21ecc5a7 | 299 | |
7a9bf9a4 JM |
300 | /* Return true if a warning should be given about option OPTION, |
301 | which is for the wrong language, false if it should be quietly | |
302 | ignored. */ | |
303 | bool (*complain_wrong_lang_p) (const struct cl_option *option); | |
304 | ||
2772ef3e NB |
305 | /* Handle the switch CODE, which has real type enum opt_code from |
306 | options.h. If the switch takes an argument, it is passed in ARG | |
4d6922ee | 307 | which points to permanent storage. The handler is responsible for |
2772ef3e NB |
308 | checking whether ARG is NULL, which indicates that no argument |
309 | was in fact supplied. For -f and -W switches, VALUE is 1 or 0 | |
5f20c657 | 310 | for the positive and negative forms respectively. HANDLERS should |
a4d8c676 JM |
311 | be passed to any recursive handle_option calls. LOC is the |
312 | location of the option. | |
2772ef3e | 313 | |
5f20c657 JM |
314 | Return true if the switch is valid, false if invalid. */ |
315 | bool (*handle_option) (size_t code, const char *arg, int value, int kind, | |
a4d8c676 | 316 | location_t loc, |
5f20c657 | 317 | const struct cl_option_handlers *handlers); |
2772ef3e | 318 | |
4bfec483 NB |
319 | /* Called when all command line options have been parsed to allow |
320 | further processing and initialization | |
e5f3b786 | 321 | |
4bfec483 NB |
322 | Should return true to indicate that a compiler back-end is |
323 | not required, such as with the -E option. | |
0c20a65f | 324 | |
cc2902df | 325 | If errorcount is nonzero after this call the compiler exits |
e5f3b786 | 326 | immediately and the finish hook is not called. */ |
0c20a65f | 327 | bool (*post_options) (const char **); |
4bfec483 NB |
328 | |
329 | /* Called after post_options to initialize the front end. Return | |
330 | false to indicate that no further compilation be performed, in | |
331 | which case the finish hook is called immediately. */ | |
0c20a65f | 332 | bool (*init) (void); |
4d6baafa NB |
333 | |
334 | /* Called at the end of compilation, as a finalizer. */ | |
0c20a65f | 335 | void (*finish) (void); |
4d6baafa | 336 | |
b37421c6 JM |
337 | /* Parses the entire file. */ |
338 | void (*parse_file) (void); | |
52dabb6c | 339 | |
e8924938 PB |
340 | /* Determines if it's ok for a function to have no noreturn attribute. */ |
341 | bool (*missing_noreturn_ok_p) (tree); | |
342 | ||
d23c55c2 NB |
343 | /* Called to obtain the alias set to be used for an expression or type. |
344 | Returns -1 if the language does nothing special for it. */ | |
4862826d | 345 | alias_set_type (*get_alias_set) (tree); |
d23c55c2 | 346 | |
48a7a235 NB |
347 | /* Function to finish handling an incomplete decl at the end of |
348 | compilation. Default hook is does nothing. */ | |
0c20a65f | 349 | void (*finish_incomplete_decl) (tree); |
48a7a235 | 350 | |
63e1b1c4 NB |
351 | /* Replace the DECL_LANG_SPECIFIC data, which may be NULL, of the |
352 | DECL_NODE with a newly GC-allocated copy. */ | |
0c20a65f | 353 | void (*dup_lang_specific_decl) (tree); |
63e1b1c4 | 354 | |
599bba86 NB |
355 | /* Set the DECL_ASSEMBLER_NAME for a node. If it is the sort of |
356 | thing that the assembler should talk about, set | |
357 | DECL_ASSEMBLER_NAME to an appropriate IDENTIFIER_NODE. | |
358 | Otherwise, set it to the ERROR_MARK_NODE to ensure that the | |
359 | assembler does not talk about it. */ | |
0c20a65f | 360 | void (*set_decl_assembler_name) (tree); |
599bba86 | 361 | |
5d69f816 NB |
362 | /* The front end can add its own statistics to -fmem-report with |
363 | this hook. It should output to stderr. */ | |
0c20a65f | 364 | void (*print_statistics) (void); |
5d69f816 | 365 | |
6615c446 JO |
366 | /* Called by print_tree when there is a tree of class tcc_exceptional |
367 | that it doesn't know how to display. */ | |
5d69f816 NB |
368 | lang_print_tree_hook print_xnode; |
369 | ||
6615c446 JO |
370 | /* Called to print language-dependent parts of tcc_decl, tcc_type, |
371 | and IDENTIFIER_NODE nodes. */ | |
5d69f816 NB |
372 | lang_print_tree_hook print_decl; |
373 | lang_print_tree_hook print_type; | |
374 | lang_print_tree_hook print_identifier; | |
375 | ||
7afff7cf NB |
376 | /* Computes the name to use to print a declaration. DECL is the |
377 | non-NULL declaration in question. VERBOSITY determines what | |
378 | information will be printed: 0: DECL_NAME, demangled as | |
379 | necessary. 1: and scope information. 2: and any other | |
380 | information that might be interesting, such as function parameter | |
4f1e4960 JM |
381 | types in C++. The name is in the internal character set and |
382 | needs to be converted to the locale character set of diagnostics, | |
383 | or to the execution character set for strings such as | |
384 | __PRETTY_FUNCTION__. */ | |
0c20a65f | 385 | const char *(*decl_printable_name) (tree decl, int verbosity); |
7afff7cf | 386 | |
721a8ac5 NS |
387 | /* Computes the dwarf-2/3 name for a tree. VERBOSITY determines what |
388 | information will be printed: 0: DECL_NAME, demangled as | |
389 | necessary. 1: and scope information. */ | |
390 | const char *(*dwarf_name) (tree, int verbosity); | |
391 | ||
6de9cd9a DN |
392 | /* This compares two types for equivalence ("compatible" in C-based languages). |
393 | This routine should only return 1 if it is sure. It should not be used | |
394 | in contexts where erroneously returning 0 causes problems. */ | |
395 | int (*types_compatible_p) (tree x, tree y); | |
396 | ||
7cb32822 | 397 | /* Called by report_error_function to print out function name. */ |
1ebe4b4f | 398 | void (*print_error_function) (diagnostic_context *, const char *, |
c94ed7a1 | 399 | struct diagnostic_info *); |
7cb32822 | 400 | |
c5ff069d ZW |
401 | /* Convert a character from the host's to the target's character |
402 | set. The character should be in what C calls the "basic source | |
403 | character set" (roughly, the set of characters defined by plain | |
404 | old ASCII). The default is to return the character unchanged, | |
405 | which is correct in most circumstances. Note that both argument | |
406 | and result should be sign-extended under -fsigned-char, | |
407 | zero-extended under -fno-signed-char. */ | |
408 | HOST_WIDE_INT (*to_target_charset) (HOST_WIDE_INT); | |
409 | ||
349ae713 NB |
410 | /* Pointers to machine-independent attribute tables, for front ends |
411 | using attribs.c. If one is NULL, it is ignored. Respectively, a | |
412 | table of attributes specific to the language, a table of | |
413 | attributes common to two or more languages (to allow easy | |
414 | sharing), and a table of attributes for checking formats. */ | |
415 | const struct attribute_spec *attribute_table; | |
416 | const struct attribute_spec *common_attribute_table; | |
417 | const struct attribute_spec *format_attribute_table; | |
418 | ||
d23c55c2 | 419 | struct lang_hooks_for_tree_inlining tree_inlining; |
e11e816e | 420 | |
89d684bb | 421 | struct lang_hooks_for_tree_dump tree_dump; |
d23c55c2 | 422 | |
43577e6b NB |
423 | struct lang_hooks_for_decls decls; |
424 | ||
f1e639b1 | 425 | struct lang_hooks_for_types types; |
939b37da | 426 | |
d7f09764 DN |
427 | struct lang_hooks_for_lto lto; |
428 | ||
98e81123 JM |
429 | /* Returns a TREE_VEC of the generic parameters of an instantiation of |
430 | a generic type or decl, e.g. C++ template instantiation. If | |
431 | TREE_CHAIN of the return value is set, it is an INTEGER_CST | |
432 | indicating how many of the elements are non-default. */ | |
f9329c35 DS |
433 | tree (*get_innermost_generic_parms) (const_tree); |
434 | ||
435 | /* Returns the TREE_VEC of arguments of an instantiation | |
436 | of a generic type of decl, e.g. C++ template instantiation. */ | |
437 | tree (*get_innermost_generic_args) (const_tree); | |
438 | ||
d40a19da DS |
439 | /* Determine if a tree is a function parameter pack. */ |
440 | bool (*function_parameter_pack_p) (const_tree); | |
441 | ||
6de9cd9a DN |
442 | /* Perform language-specific gimplification on the argument. Returns an |
443 | enum gimplify_status, though we can't see that type here. */ | |
726a989a | 444 | int (*gimplify_expr) (tree *, gimple_seq *, gimple_seq *); |
6de9cd9a | 445 | |
c79efc4d RÁE |
446 | /* Do language specific processing in the builtin function DECL */ |
447 | tree (*builtin_function) (tree decl); | |
6e34d3a3 | 448 | |
5779e713 MM |
449 | /* Like builtin_function, but make sure the scope is the external scope. |
450 | This is used to delay putting in back end builtin functions until the ISA | |
451 | that defines the builtin is declared via function specific target options, | |
452 | which can save memory for machines like the x86_64 that have multiple | |
453 | ISAs. If this points to the same function as builtin_function, the | |
454 | backend must add all of the builtins at program initialization time. */ | |
455 | tree (*builtin_function_ext_scope) (tree decl); | |
456 | ||
820cc88f DB |
457 | /* Used to set up the tree_contains_structure array for a frontend. */ |
458 | void (*init_ts) (void); | |
459 | ||
127203ac | 460 | /* Called by recompute_tree_invariant_for_addr_expr to go from EXPR |
51eed280 PB |
461 | to a contained expression or DECL, possibly updating *TC or *SE |
462 | if in the process TREE_CONSTANT or TREE_SIDE_EFFECTS need updating. */ | |
463 | tree (*expr_to_decl) (tree expr, bool *tc, bool *se); | |
73f397d4 | 464 | |
f9417da1 RG |
465 | /* The EH personality function decl. */ |
466 | tree (*eh_personality) (void); | |
467 | ||
468 | /* Map a type to a runtime object to match type. */ | |
469 | tree (*eh_runtime_type) (tree); | |
470 | ||
3b06d379 SB |
471 | /* If non-NULL, this is a function that returns a function decl to be |
472 | executed if an unhandled exception is propagated out of a cleanup | |
473 | region. For example, in C++, an exception thrown by a destructor | |
474 | during stack unwinding is required to result in a call to | |
475 | `std::terminate', so the C++ version of this function returns a | |
476 | FUNCTION_DECL for `std::terminate'. */ | |
477 | tree (*eh_protect_cleanup_actions) (void); | |
478 | ||
88cd0e88 JJ |
479 | /* Return true if a stmt can fallthru. Used by block_may_fallthru |
480 | to possibly handle language trees. */ | |
481 | bool (*block_may_fallthru) (const_tree); | |
482 | ||
384c400a RH |
483 | /* True if this language uses __cxa_end_cleanup when the ARM EABI |
484 | is enabled. */ | |
485 | bool eh_use_cxa_end_cleanup; | |
486 | ||
616f1431 EB |
487 | /* True if this language requires deep unsharing of tree nodes prior to |
488 | gimplification. */ | |
489 | bool deep_unsharing; | |
490 | ||
89d684bb | 491 | /* Whenever you add entries here, make sure you adjust langhooks-def.h |
d23c55c2 NB |
492 | and langhooks.c accordingly. */ |
493 | }; | |
494 | ||
495 | /* Each front end provides its own. */ | |
4537ec0c | 496 | extern struct lang_hooks lang_hooks; |
c0814136 | 497 | |
c79efc4d RÁE |
498 | extern tree add_builtin_function (const char *name, tree type, |
499 | int function_code, enum built_in_class cl, | |
500 | const char *library_name, | |
501 | tree attrs); | |
69dcadff | 502 | |
5779e713 MM |
503 | extern tree add_builtin_function_ext_scope (const char *name, tree type, |
504 | int function_code, | |
505 | enum built_in_class cl, | |
506 | const char *library_name, | |
507 | tree attrs); | |
c0814136 | 508 | extern tree add_builtin_type (const char *name, tree type); |
dcc97066 MW |
509 | |
510 | /* Language helper functions. */ | |
511 | ||
512 | extern bool lang_GNU_C (void); | |
513 | extern bool lang_GNU_CXX (void); | |
de3aebff | 514 | extern bool lang_GNU_Fortran (void); |
c0814136 | 515 | |
69dcadff | 516 | #endif /* GCC_LANG_HOOKS_H */ |