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annotate gcc/langhooks.h @ 55:77e2b8dfacca gcc-4.4.5
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| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Fri, 12 Feb 2010 23:39:51 +0900 |
| parents | a06113de4d67 |
| children | b7f97abdc517 |
| rev | line source |
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| 0 | 1 /* The lang_hooks data structure. |
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2 Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
| 0 | 3 Free Software Foundation, Inc. |
| 4 | |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify | |
| 8 it under the terms of the GNU General Public License as published by | |
| 9 the Free Software Foundation; either version 3, or (at your option) | |
| 10 any later version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, | |
| 13 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 GNU General Public License for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with GCC; see the file COPYING3. If not see | |
| 19 <http://www.gnu.org/licenses/>. */ | |
| 20 | |
| 21 #ifndef GCC_LANG_HOOKS_H | |
| 22 #define GCC_LANG_HOOKS_H | |
| 23 | |
| 24 /* This file should be #include-d after tree.h. */ | |
| 25 | |
| 26 struct diagnostic_context; | |
| 27 struct diagnostic_info; | |
| 28 | |
| 29 struct gimplify_omp_ctx; | |
| 30 | |
| 31 struct array_descr_info; | |
| 32 | |
| 33 /* A print hook for print_tree (). */ | |
| 34 typedef void (*lang_print_tree_hook) (FILE *, tree, int indent); | |
| 35 | |
| 36 enum classify_record | |
| 37 { RECORD_IS_STRUCT, RECORD_IS_CLASS, RECORD_IS_INTERFACE }; | |
| 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 struct lang_hooks_for_callgraph | |
| 48 { | |
| 49 /* The node passed is a language-specific tree node. If its contents | |
| 50 are relevant to use of other declarations, mark them. */ | |
| 51 tree (*analyze_expr) (tree *, int *); | |
| 52 }; | |
| 53 | |
| 54 /* The following hooks are used by tree-dump.c. */ | |
| 55 | |
| 56 struct lang_hooks_for_tree_dump | |
| 57 { | |
| 58 /* Dump language-specific parts of tree nodes. Returns nonzero if it | |
| 59 does not want the usual dumping of the second argument. */ | |
| 60 bool (*dump_tree) (void *, tree); | |
| 61 | |
| 62 /* Determine type qualifiers in a language-specific way. */ | |
| 63 int (*type_quals) (const_tree); | |
| 64 }; | |
| 65 | |
| 66 /* Hooks related to types. */ | |
| 67 | |
| 68 struct lang_hooks_for_types | |
| 69 { | |
| 70 /* Return a new type (with the indicated CODE), doing whatever | |
| 71 language-specific processing is required. */ | |
| 72 tree (*make_type) (enum tree_code); | |
| 73 | |
| 74 /* Return what kind of RECORD_TYPE this is, mainly for purposes of | |
| 75 debug information. If not defined, record types are assumed to | |
| 76 be structures. */ | |
| 77 enum classify_record (*classify_record) (tree); | |
| 78 | |
| 79 /* Given MODE and UNSIGNEDP, return a suitable type-tree with that | |
| 80 mode. */ | |
| 81 tree (*type_for_mode) (enum machine_mode, int); | |
| 82 | |
| 83 /* Given PRECISION and UNSIGNEDP, return a suitable type-tree for an | |
| 84 integer type with at least that precision. */ | |
| 85 tree (*type_for_size) (unsigned, int); | |
| 86 | |
| 87 /* True if the type is an instantiation of a generic type, | |
| 88 e.g. C++ template implicit specializations. */ | |
| 89 bool (*generic_p) (const_tree); | |
| 90 | |
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91 /* Returns the TREE_VEC of elements of a given generic argument pack. */ |
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92 tree (*get_argument_pack_elems) (const_tree); |
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93 |
| 0 | 94 /* Given a type, apply default promotions to unnamed function |
| 95 arguments and return the new type. Return the same type if no | |
| 96 change. Required by any language that supports variadic | |
| 97 arguments. The default hook dies. */ | |
| 98 tree (*type_promotes_to) (tree); | |
| 99 | |
| 100 /* Register TYPE as a builtin type with the indicated NAME. The | |
| 101 TYPE is placed in the outermost lexical scope. The semantics | |
| 102 should be analogous to: | |
| 103 | |
| 104 typedef TYPE NAME; | |
| 105 | |
| 106 in C. The default hook ignores the declaration. */ | |
| 107 void (*register_builtin_type) (tree, const char *); | |
| 108 | |
| 109 /* This routine is called in tree.c to print an error message for | |
| 110 invalid use of an incomplete type. VALUE is the expression that | |
| 111 was used (or 0 if that isn't known) and TYPE is the type that was | |
| 112 invalid. */ | |
| 113 void (*incomplete_type_error) (const_tree value, const_tree type); | |
| 114 | |
| 115 /* Called from assign_temp to return the maximum size, if there is one, | |
| 116 for a type. */ | |
| 117 tree (*max_size) (const_tree); | |
| 118 | |
| 119 /* Register language specific type size variables as potentially OpenMP | |
| 120 firstprivate variables. */ | |
| 121 void (*omp_firstprivatize_type_sizes) (struct gimplify_omp_ctx *, tree); | |
| 122 | |
| 123 /* Return TRUE if TYPE1 and TYPE2 are identical for type hashing purposes. | |
| 124 Called only after doing all language independent checks. | |
| 125 At present, this function is only called when both TYPE1 and TYPE2 are | |
| 126 FUNCTION_TYPEs. */ | |
| 127 bool (*type_hash_eq) (const_tree, const_tree); | |
| 128 | |
| 129 /* Return TRUE if TYPE uses a hidden descriptor and fills in information | |
| 130 for the debugger about the array bounds, strides, etc. */ | |
| 131 bool (*get_array_descr_info) (const_tree, struct array_descr_info *); | |
| 132 | |
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133 /* Fill in information for the debugger about the bounds of TYPE. */ |
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134 void (*get_subrange_bounds) (const_tree, tree *, tree *); |
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135 |
| 0 | 136 /* If we requested a pointer to a vector, build up the pointers that |
| 137 we stripped off while looking for the inner type. Similarly for | |
| 138 return values from functions. The argument TYPE is the top of the | |
| 139 chain, and BOTTOM is the new type which we will point to. */ | |
| 140 tree (*reconstruct_complex_type) (tree, tree); | |
| 141 | |
| 142 /* Nonzero if types that are identical are to be hashed so that only | |
| 143 one copy is kept. If a language requires unique types for each | |
| 144 user-specified type, such as Ada, this should be set to TRUE. */ | |
| 145 bool hash_types; | |
| 146 }; | |
| 147 | |
| 148 /* Language hooks related to decls and the symbol table. */ | |
| 149 | |
| 150 struct lang_hooks_for_decls | |
| 151 { | |
| 152 /* Returns nonzero if we are in the global binding level. Ada | |
| 153 returns -1 for an undocumented reason used in stor-layout.c. */ | |
| 154 int (*global_bindings_p) (void); | |
| 155 | |
| 156 /* Function to add a decl to the current scope level. Takes one | |
| 157 argument, a decl to add. Returns that decl, or, if the same | |
| 158 symbol is already declared, may return a different decl for that | |
| 159 name. */ | |
| 160 tree (*pushdecl) (tree); | |
| 161 | |
| 162 /* Returns the chain of decls so far in the current scope level. */ | |
| 163 tree (*getdecls) (void); | |
| 164 | |
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165 /* Returns true if DECL is explicit member function. */ |
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166 bool (*function_decl_explicit_p) (tree); |
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167 |
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168 /* Returns True if the parameter is a generic parameter decl |
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169 of a generic type, e.g a template template parameter for the C++ FE. */ |
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170 bool (*generic_generic_parameter_decl_p) (const_tree); |
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171 |
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172 /* Determine if a function parameter got expanded from a |
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173 function parameter pack. */ |
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174 bool (*function_parm_expanded_from_pack_p) (tree, tree); |
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175 |
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176 /* Returns the generic declaration of a generic function instantiations. */ |
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177 tree (*get_generic_function_decl) (const_tree); |
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178 |
| 0 | 179 /* Returns true when we should warn for an unused global DECL. |
| 180 We will already have checked that it has static binding. */ | |
| 181 bool (*warn_unused_global) (const_tree); | |
| 182 | |
| 183 /* Obtain a list of globals and do final output on them at end | |
| 184 of compilation */ | |
| 185 void (*final_write_globals) (void); | |
| 186 | |
| 187 /* True if this decl may be called via a sibcall. */ | |
| 188 bool (*ok_for_sibcall) (const_tree); | |
| 189 | |
| 190 /* True if OpenMP should privatize what this DECL points to rather | |
| 191 than the DECL itself. */ | |
| 192 bool (*omp_privatize_by_reference) (const_tree); | |
| 193 | |
| 194 /* Return sharing kind if OpenMP sharing attribute of DECL is | |
| 195 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */ | |
| 196 enum omp_clause_default_kind (*omp_predetermined_sharing) (tree); | |
| 197 | |
| 198 /* Return true if DECL's DECL_VALUE_EXPR (if any) should be | |
| 199 disregarded in OpenMP construct, because it is going to be | |
| 200 remapped during OpenMP lowering. SHARED is true if DECL | |
| 201 is going to be shared, false if it is going to be privatized. */ | |
| 202 bool (*omp_disregard_value_expr) (tree, bool); | |
| 203 | |
| 204 /* Return true if DECL that is shared iff SHARED is true should | |
| 205 be put into OMP_CLAUSE_PRIVATE_DEBUG. */ | |
| 206 bool (*omp_private_debug_clause) (tree, bool); | |
| 207 | |
| 208 /* Return true if DECL in private clause needs | |
| 209 OMP_CLAUSE_PRIVATE_OUTER_REF on the private clause. */ | |
| 210 bool (*omp_private_outer_ref) (tree); | |
| 211 | |
| 212 /* Build and return code for a default constructor for DECL in | |
| 213 response to CLAUSE. OUTER is corresponding outer region's | |
| 214 variable if needed. Return NULL if nothing to be done. */ | |
| 215 tree (*omp_clause_default_ctor) (tree clause, tree decl, tree outer); | |
| 216 | |
| 217 /* Build and return code for a copy constructor from SRC to DST. */ | |
| 218 tree (*omp_clause_copy_ctor) (tree clause, tree dst, tree src); | |
| 219 | |
| 220 /* Similarly, except use an assignment operator instead. */ | |
| 221 tree (*omp_clause_assign_op) (tree clause, tree dst, tree src); | |
| 222 | |
| 223 /* Build and return code destructing DECL. Return NULL if nothing | |
| 224 to be done. */ | |
| 225 tree (*omp_clause_dtor) (tree clause, tree decl); | |
| 226 | |
| 227 /* Do language specific checking on an implicitly determined clause. */ | |
| 228 void (*omp_finish_clause) (tree clause); | |
| 229 }; | |
| 230 | |
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231 /* Language hooks related to LTO serialization. */ |
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232 |
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233 struct lang_hooks_for_lto |
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234 { |
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235 /* Begin a new LTO section named NAME. */ |
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236 void (*begin_section) (const char *name); |
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237 |
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238 /* Write DATA of length LEN to the currently open LTO section. BLOCK is a |
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239 pointer to the dynamically allocated memory containing DATA. The |
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240 append_data function is responsible for freeing it when it is no longer |
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241 needed. */ |
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242 void (*append_data) (const void *data, size_t len, void *block); |
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243 |
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244 /* End the previously begun LTO section. */ |
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245 void (*end_section) (void); |
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246 }; |
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247 |
| 0 | 248 /* Language-specific hooks. See langhooks-def.h for defaults. */ |
| 249 | |
| 250 struct lang_hooks | |
| 251 { | |
| 252 /* String identifying the front end. e.g. "GNU C++". */ | |
| 253 const char *name; | |
| 254 | |
| 255 /* sizeof (struct lang_identifier), so make_node () creates | |
| 256 identifier nodes long enough for the language-specific slots. */ | |
| 257 size_t identifier_size; | |
| 258 | |
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259 /* Remove any parts of the tree that are used only by the FE. */ |
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260 void (*free_lang_data) (tree); |
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261 |
| 0 | 262 /* Determines the size of any language-specific tcc_constant or |
| 263 tcc_exceptional nodes. Since it is called from make_node, the | |
| 264 only information available is the tree code. Expected to die | |
| 265 on unrecognized codes. */ | |
| 266 size_t (*tree_size) (enum tree_code); | |
| 267 | |
| 268 /* The first callback made to the front end, for simple | |
| 269 initialization needed before any calls to handle_option. Return | |
| 270 the language mask to filter the switch array with. */ | |
| 271 unsigned int (*init_options) (unsigned int argc, const char **argv); | |
| 272 | |
| 273 /* Callback used to perform language-specific initialization for the | |
| 274 global diagnostic context structure. */ | |
| 275 void (*initialize_diagnostics) (struct diagnostic_context *); | |
| 276 | |
| 277 /* Handle the switch CODE, which has real type enum opt_code from | |
| 278 options.h. If the switch takes an argument, it is passed in ARG | |
| 279 which points to permanent storage. The handler is responsible for | |
| 280 checking whether ARG is NULL, which indicates that no argument | |
| 281 was in fact supplied. For -f and -W switches, VALUE is 1 or 0 | |
| 282 for the positive and negative forms respectively. | |
| 283 | |
| 284 Return 1 if the switch is valid, 0 if invalid, and -1 if it's | |
| 285 valid and should not be treated as language-independent too. */ | |
| 286 int (*handle_option) (size_t code, const char *arg, int value); | |
| 287 | |
| 288 /* Return false to use the default complaint about a missing | |
| 289 argument, otherwise output a complaint and return true. */ | |
| 290 bool (*missing_argument) (const char *opt, size_t code); | |
| 291 | |
| 292 /* Called when all command line options have been parsed to allow | |
| 293 further processing and initialization | |
| 294 | |
| 295 Should return true to indicate that a compiler back-end is | |
| 296 not required, such as with the -E option. | |
| 297 | |
| 298 If errorcount is nonzero after this call the compiler exits | |
| 299 immediately and the finish hook is not called. */ | |
| 300 bool (*post_options) (const char **); | |
| 301 | |
| 302 /* Called after post_options to initialize the front end. Return | |
| 303 false to indicate that no further compilation be performed, in | |
| 304 which case the finish hook is called immediately. */ | |
| 305 bool (*init) (void); | |
| 306 | |
| 307 /* Called at the end of compilation, as a finalizer. */ | |
| 308 void (*finish) (void); | |
| 309 | |
| 310 /* Parses the entire file. The argument is nonzero to cause bison | |
| 311 parsers to dump debugging information during parsing. */ | |
| 312 void (*parse_file) (int); | |
| 313 | |
| 314 /* Determines if it's ok for a function to have no noreturn attribute. */ | |
| 315 bool (*missing_noreturn_ok_p) (tree); | |
| 316 | |
| 317 /* Called to obtain the alias set to be used for an expression or type. | |
| 318 Returns -1 if the language does nothing special for it. */ | |
| 319 alias_set_type (*get_alias_set) (tree); | |
| 320 | |
| 321 /* Function to finish handling an incomplete decl at the end of | |
| 322 compilation. Default hook is does nothing. */ | |
| 323 void (*finish_incomplete_decl) (tree); | |
| 324 | |
| 325 /* Replace the DECL_LANG_SPECIFIC data, which may be NULL, of the | |
| 326 DECL_NODE with a newly GC-allocated copy. */ | |
| 327 void (*dup_lang_specific_decl) (tree); | |
| 328 | |
| 329 /* Set the DECL_ASSEMBLER_NAME for a node. If it is the sort of | |
| 330 thing that the assembler should talk about, set | |
| 331 DECL_ASSEMBLER_NAME to an appropriate IDENTIFIER_NODE. | |
| 332 Otherwise, set it to the ERROR_MARK_NODE to ensure that the | |
| 333 assembler does not talk about it. */ | |
| 334 void (*set_decl_assembler_name) (tree); | |
| 335 | |
| 336 /* The front end can add its own statistics to -fmem-report with | |
| 337 this hook. It should output to stderr. */ | |
| 338 void (*print_statistics) (void); | |
| 339 | |
| 340 /* Called by print_tree when there is a tree of class tcc_exceptional | |
| 341 that it doesn't know how to display. */ | |
| 342 lang_print_tree_hook print_xnode; | |
| 343 | |
| 344 /* Called to print language-dependent parts of tcc_decl, tcc_type, | |
| 345 and IDENTIFIER_NODE nodes. */ | |
| 346 lang_print_tree_hook print_decl; | |
| 347 lang_print_tree_hook print_type; | |
| 348 lang_print_tree_hook print_identifier; | |
| 349 | |
| 350 /* Computes the name to use to print a declaration. DECL is the | |
| 351 non-NULL declaration in question. VERBOSITY determines what | |
| 352 information will be printed: 0: DECL_NAME, demangled as | |
| 353 necessary. 1: and scope information. 2: and any other | |
| 354 information that might be interesting, such as function parameter | |
|
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355 types in C++. The name is in the internal character set and |
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356 needs to be converted to the locale character set of diagnostics, |
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357 or to the execution character set for strings such as |
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358 __PRETTY_FUNCTION__. */ |
| 0 | 359 const char *(*decl_printable_name) (tree decl, int verbosity); |
| 360 | |
| 361 /* Computes the dwarf-2/3 name for a tree. VERBOSITY determines what | |
| 362 information will be printed: 0: DECL_NAME, demangled as | |
| 363 necessary. 1: and scope information. */ | |
| 364 const char *(*dwarf_name) (tree, int verbosity); | |
| 365 | |
| 366 /* This compares two types for equivalence ("compatible" in C-based languages). | |
| 367 This routine should only return 1 if it is sure. It should not be used | |
| 368 in contexts where erroneously returning 0 causes problems. */ | |
| 369 int (*types_compatible_p) (tree x, tree y); | |
| 370 | |
| 371 /* Called by report_error_function to print out function name. */ | |
| 372 void (*print_error_function) (struct diagnostic_context *, const char *, | |
| 373 struct diagnostic_info *); | |
| 374 | |
| 375 /* Convert a character from the host's to the target's character | |
| 376 set. The character should be in what C calls the "basic source | |
| 377 character set" (roughly, the set of characters defined by plain | |
| 378 old ASCII). The default is to return the character unchanged, | |
| 379 which is correct in most circumstances. Note that both argument | |
| 380 and result should be sign-extended under -fsigned-char, | |
| 381 zero-extended under -fno-signed-char. */ | |
| 382 HOST_WIDE_INT (*to_target_charset) (HOST_WIDE_INT); | |
| 383 | |
| 384 /* Pointers to machine-independent attribute tables, for front ends | |
| 385 using attribs.c. If one is NULL, it is ignored. Respectively, a | |
| 386 table of attributes specific to the language, a table of | |
| 387 attributes common to two or more languages (to allow easy | |
| 388 sharing), and a table of attributes for checking formats. */ | |
| 389 const struct attribute_spec *attribute_table; | |
| 390 const struct attribute_spec *common_attribute_table; | |
| 391 const struct attribute_spec *format_attribute_table; | |
| 392 | |
| 393 struct lang_hooks_for_tree_inlining tree_inlining; | |
| 394 | |
| 395 struct lang_hooks_for_callgraph callgraph; | |
| 396 | |
| 397 struct lang_hooks_for_tree_dump tree_dump; | |
| 398 | |
| 399 struct lang_hooks_for_decls decls; | |
| 400 | |
| 401 struct lang_hooks_for_types types; | |
| 402 | |
|
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403 struct lang_hooks_for_lto lto; |
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404 |
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405 /* Returns the generic parameters of an instantiation of |
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406 a generic type or decl, e.g. C++ template instantiation. */ |
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407 tree (*get_innermost_generic_parms) (const_tree); |
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408 |
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409 /* Returns the TREE_VEC of arguments of an instantiation |
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410 of a generic type of decl, e.g. C++ template instantiation. */ |
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411 tree (*get_innermost_generic_args) (const_tree); |
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412 |
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413 /* Determine if a tree is a function parameter pack. */ |
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414 bool (*function_parameter_pack_p) (const_tree); |
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415 |
| 0 | 416 /* Perform language-specific gimplification on the argument. Returns an |
| 417 enum gimplify_status, though we can't see that type here. */ | |
| 418 int (*gimplify_expr) (tree *, gimple_seq *, gimple_seq *); | |
| 419 | |
| 420 /* Fold an OBJ_TYPE_REF expression to the address of a function. | |
| 421 KNOWN_TYPE carries the true type of the OBJ_TYPE_REF_OBJECT. */ | |
| 422 tree (*fold_obj_type_ref) (tree, tree); | |
| 423 | |
| 424 /* Do language specific processing in the builtin function DECL */ | |
| 425 tree (*builtin_function) (tree decl); | |
| 426 | |
| 427 /* Like builtin_function, but make sure the scope is the external scope. | |
| 428 This is used to delay putting in back end builtin functions until the ISA | |
| 429 that defines the builtin is declared via function specific target options, | |
| 430 which can save memory for machines like the x86_64 that have multiple | |
| 431 ISAs. If this points to the same function as builtin_function, the | |
| 432 backend must add all of the builtins at program initialization time. */ | |
| 433 tree (*builtin_function_ext_scope) (tree decl); | |
| 434 | |
| 435 /* Used to set up the tree_contains_structure array for a frontend. */ | |
| 436 void (*init_ts) (void); | |
| 437 | |
| 438 /* Called by recompute_tree_invariant_for_addr_expr to go from EXPR | |
| 439 to a contained expression or DECL, possibly updating *TC or *SE | |
| 440 if in the process TREE_CONSTANT or TREE_SIDE_EFFECTS need updating. */ | |
| 441 tree (*expr_to_decl) (tree expr, bool *tc, bool *se); | |
| 442 | |
|
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443 /* The EH personality function decl. */ |
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444 tree (*eh_personality) (void); |
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445 |
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446 /* Map a type to a runtime object to match type. */ |
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447 tree (*eh_runtime_type) (tree); |
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448 |
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449 /* True if this language uses __cxa_end_cleanup when the ARM EABI |
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450 is enabled. */ |
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451 bool eh_use_cxa_end_cleanup; |
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452 |
| 0 | 453 /* Whenever you add entries here, make sure you adjust langhooks-def.h |
| 454 and langhooks.c accordingly. */ | |
| 455 }; | |
| 456 | |
| 457 /* Each front end provides its own. */ | |
|
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458 extern struct lang_hooks lang_hooks; |
| 0 | 459 extern tree add_builtin_function (const char *name, tree type, |
| 460 int function_code, enum built_in_class cl, | |
| 461 const char *library_name, | |
| 462 tree attrs); | |
| 463 | |
| 464 extern tree add_builtin_function_ext_scope (const char *name, tree type, | |
| 465 int function_code, | |
| 466 enum built_in_class cl, | |
| 467 const char *library_name, | |
| 468 tree attrs); | |
| 469 | |
| 470 #endif /* GCC_LANG_HOOKS_H */ |