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b4c522fa | 1 | /* decl.cc -- Lower D frontend declarations to GCC trees. |
8d9254fc | 2 | Copyright (C) 2006-2020 Free Software Foundation, Inc. |
b4c522fa IB |
3 | |
4 | GCC is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation; either version 3, or (at your option) | |
7 | any later version. | |
8 | ||
9 | GCC is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with GCC; see the file COPYING3. If not see | |
16 | <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include "config.h" | |
19 | #include "system.h" | |
20 | #include "coretypes.h" | |
21 | ||
22 | #include "dmd/aggregate.h" | |
23 | #include "dmd/attrib.h" | |
c50eadba | 24 | #include "dmd/cond.h" |
b4c522fa IB |
25 | #include "dmd/ctfe.h" |
26 | #include "dmd/declaration.h" | |
27 | #include "dmd/enum.h" | |
28 | #include "dmd/errors.h" | |
29 | #include "dmd/globals.h" | |
30 | #include "dmd/hdrgen.h" | |
31 | #include "dmd/identifier.h" | |
32 | #include "dmd/import.h" | |
33 | #include "dmd/init.h" | |
34 | #include "dmd/mangle.h" | |
35 | #include "dmd/module.h" | |
36 | #include "dmd/nspace.h" | |
37 | #include "dmd/target.h" | |
38 | #include "dmd/template.h" | |
39 | ||
40 | #include "tree.h" | |
41 | #include "tree-iterator.h" | |
42 | #include "fold-const.h" | |
43 | #include "diagnostic.h" | |
44 | #include "langhooks.h" | |
45 | #include "target.h" | |
46 | #include "common/common-target.h" | |
47 | #include "cgraph.h" | |
48 | #include "toplev.h" | |
49 | #include "stringpool.h" | |
50 | #include "varasm.h" | |
51 | #include "stor-layout.h" | |
52 | #include "attribs.h" | |
53 | #include "function.h" | |
54 | #include "debug.h" | |
55 | #include "tree-pretty-print.h" | |
56 | ||
57 | #include "d-tree.h" | |
58 | ||
59 | ||
60 | /* Return identifier for the external mangled name of DECL. */ | |
61 | ||
b5446d0c IB |
62 | const char * |
63 | d_mangle_decl (Dsymbol *decl) | |
b4c522fa IB |
64 | { |
65 | if (decl->isFuncDeclaration ()) | |
66 | return mangleExact ((FuncDeclaration *)decl); | |
67 | else | |
68 | { | |
69 | OutBuffer buf; | |
70 | mangleToBuffer (decl, &buf); | |
fced594b | 71 | return buf.extractChars (); |
b4c522fa IB |
72 | } |
73 | } | |
74 | ||
75 | /* Generate a mangled identifier using NAME and SUFFIX, prefixed by the | |
76 | assembler name for DECL. */ | |
77 | ||
78 | tree | |
79 | mangle_internal_decl (Dsymbol *decl, const char *name, const char *suffix) | |
80 | { | |
b5446d0c | 81 | const char *prefix = d_mangle_decl (decl); |
b4c522fa IB |
82 | unsigned namelen = strlen (name); |
83 | unsigned buflen = (2 + strlen (prefix) + namelen + strlen (suffix)) * 2; | |
84 | char *buf = (char *) alloca (buflen); | |
85 | ||
86 | snprintf (buf, buflen, "_D%s%u%s%s", prefix, namelen, name, suffix); | |
87 | tree ident = get_identifier (buf); | |
88 | ||
89 | /* Symbol is not found in user code, but generate a readable name for it | |
90 | anyway for debug and diagnostic reporting. */ | |
91 | snprintf (buf, buflen, "%s.%s", decl->toPrettyChars (), name); | |
92 | IDENTIFIER_PRETTY_NAME (ident) = get_identifier (buf); | |
93 | ||
94 | return ident; | |
95 | } | |
96 | ||
97 | /* Returns true if DECL is from the gcc.attribute module. */ | |
98 | ||
99 | static bool | |
100 | gcc_attribute_p (Dsymbol *decl) | |
101 | { | |
102 | ModuleDeclaration *md = decl->getModule ()->md; | |
103 | ||
2cbc99d1 | 104 | if (md && md->packages && md->packages->length == 1) |
b4c522fa IB |
105 | { |
106 | if (!strcmp ((*md->packages)[0]->toChars (), "gcc") | |
107 | && !strcmp (md->id->toChars (), "attribute")) | |
108 | return true; | |
109 | } | |
110 | ||
111 | return false; | |
112 | } | |
113 | ||
114 | /* Implements the visitor interface to lower all Declaration AST classes | |
115 | emitted from the D Front-end to GCC trees. | |
116 | All visit methods accept one parameter D, which holds the frontend AST | |
117 | of the declaration to compile. These also don't return any value, instead | |
118 | generated code are appened to global_declarations or added to the | |
119 | current_binding_level by d_pushdecl(). */ | |
120 | ||
121 | class DeclVisitor : public Visitor | |
122 | { | |
123 | using Visitor::visit; | |
124 | ||
c50eadba IB |
125 | /* If we're lowering the body of a version(unittest) condition. */ |
126 | bool in_version_unittest_; | |
127 | ||
b4c522fa IB |
128 | public: |
129 | DeclVisitor (void) | |
130 | { | |
c50eadba | 131 | this->in_version_unittest_ = false; |
b4c522fa IB |
132 | } |
133 | ||
7edc15f2 IB |
134 | /* Helper for generating code for the dsymbol AST class D. |
135 | Sets up the location of the symbol before lowering. */ | |
136 | ||
137 | void build_dsymbol (Dsymbol *d) | |
138 | { | |
139 | location_t saved_location = input_location; | |
140 | input_location = make_location_t (d->loc); | |
141 | d->accept (this); | |
142 | input_location = saved_location; | |
143 | } | |
144 | ||
b4c522fa IB |
145 | /* This should be overridden by each declaration class. */ |
146 | ||
147 | void visit (Dsymbol *) | |
148 | { | |
149 | } | |
150 | ||
151 | /* Compile a D module, and all members of it. */ | |
152 | ||
153 | void visit (Module *d) | |
154 | { | |
155 | if (d->semanticRun >= PASSobj) | |
156 | return; | |
157 | ||
158 | build_module_tree (d); | |
159 | d->semanticRun = PASSobj; | |
160 | } | |
161 | ||
162 | /* Write the imported symbol to debug. */ | |
163 | ||
164 | void visit (Import *d) | |
165 | { | |
e64deb74 IB |
166 | if (d->semanticRun >= PASSobj) |
167 | return; | |
168 | ||
b4c522fa IB |
169 | /* Implements import declarations by telling the debug back-end we are |
170 | importing the NAMESPACE_DECL of the module or IMPORTED_DECL of the | |
171 | declaration into the current lexical scope CONTEXT. NAME is set if | |
172 | this is a renamed import. */ | |
173 | if (d->isstatic) | |
174 | return; | |
175 | ||
176 | /* Get the context of this import, this should never be null. */ | |
177 | tree context = d_module_context (); | |
178 | ||
179 | if (d->ident == NULL) | |
180 | { | |
181 | /* Importing declaration list. */ | |
2cbc99d1 | 182 | for (size_t i = 0; i < d->names.length; i++) |
b4c522fa IB |
183 | { |
184 | AliasDeclaration *aliasdecl = d->aliasdecls[i]; | |
185 | tree decl = build_import_decl (aliasdecl); | |
186 | ||
187 | /* Skip over unhandled imports. */ | |
188 | if (decl == NULL_TREE) | |
189 | continue; | |
190 | ||
191 | Identifier *alias = d->aliases[i]; | |
192 | tree name = (alias != NULL) | |
193 | ? get_identifier (alias->toChars ()) : NULL_TREE; | |
194 | ||
195 | debug_hooks->imported_module_or_decl (decl, name, context, | |
196 | false, false); | |
197 | } | |
198 | } | |
199 | else | |
200 | { | |
201 | /* Importing the entire module. */ | |
202 | tree decl = build_import_decl (d->mod); | |
203 | ||
204 | tree name = (d->aliasId != NULL) | |
205 | ? get_identifier (d->aliasId->toChars ()) : NULL_TREE; | |
206 | ||
207 | debug_hooks->imported_module_or_decl (decl, name, context, | |
208 | false, false); | |
209 | } | |
e64deb74 IB |
210 | |
211 | d->semanticRun = PASSobj; | |
b4c522fa IB |
212 | } |
213 | ||
214 | /* Expand any local variables found in tuples. */ | |
215 | ||
216 | void visit (TupleDeclaration *d) | |
217 | { | |
2cbc99d1 | 218 | for (size_t i = 0; i < d->objects->length; i++) |
b4c522fa IB |
219 | { |
220 | RootObject *o = (*d->objects)[i]; | |
221 | if ((o->dyncast () == DYNCAST_EXPRESSION) | |
222 | && ((Expression *) o)->op == TOKdsymbol) | |
223 | { | |
224 | Declaration *d = ((DsymbolExp *) o)->s->isDeclaration (); | |
225 | if (d) | |
7edc15f2 | 226 | this->build_dsymbol (d); |
b4c522fa IB |
227 | } |
228 | } | |
229 | } | |
230 | ||
231 | /* Walk over all declarations in the attribute scope. */ | |
232 | ||
233 | void visit (AttribDeclaration *d) | |
234 | { | |
d3da83f6 | 235 | Dsymbols *ds = d->include (NULL); |
b4c522fa IB |
236 | |
237 | if (!ds) | |
238 | return; | |
239 | ||
2cbc99d1 | 240 | for (size_t i = 0; i < ds->length; i++) |
7edc15f2 | 241 | this->build_dsymbol ((*ds)[i]); |
b4c522fa IB |
242 | } |
243 | ||
244 | /* Pragmas are a way to pass special information to the compiler and to add | |
245 | vendor specific extensions to D. We don't do anything here, yet. */ | |
246 | ||
247 | void visit (PragmaDeclaration *d) | |
248 | { | |
249 | if (!global.params.ignoreUnsupportedPragmas) | |
250 | { | |
251 | if (d->ident == Identifier::idPool ("lib") | |
252 | || d->ident == Identifier::idPool ("startaddress")) | |
253 | { | |
254 | warning_at (make_location_t (d->loc), OPT_Wunknown_pragmas, | |
255 | "pragma(%s) not implemented", d->ident->toChars ()); | |
256 | } | |
257 | } | |
258 | ||
259 | visit ((AttribDeclaration *) d); | |
260 | } | |
261 | ||
c50eadba IB |
262 | /* Conditional compilation is the process of selecting which code to compile |
263 | and which code to not compile. Look for version conditions that may */ | |
264 | ||
265 | void visit (ConditionalDeclaration *d) | |
266 | { | |
267 | bool old_condition = this->in_version_unittest_; | |
268 | ||
269 | if (global.params.useUnitTests) | |
270 | { | |
271 | VersionCondition *vc = d->condition->isVersionCondition (); | |
272 | if (vc && vc->ident == Identifier::idPool ("unittest")) | |
273 | this->in_version_unittest_ = true; | |
274 | } | |
275 | ||
276 | visit ((AttribDeclaration *) d); | |
277 | ||
278 | this->in_version_unittest_ = old_condition; | |
279 | } | |
280 | ||
b4c522fa IB |
281 | /* Walk over all members in the namespace scope. */ |
282 | ||
283 | void visit (Nspace *d) | |
284 | { | |
285 | if (isError (d) || !d->members) | |
286 | return; | |
287 | ||
2cbc99d1 | 288 | for (size_t i = 0; i < d->members->length; i++) |
7edc15f2 | 289 | this->build_dsymbol ((*d->members)[i]); |
b4c522fa IB |
290 | } |
291 | ||
9dddefef IB |
292 | /* Templates are D's approach to generic programming. They have no members |
293 | that can be emitted, however if the template is nested and used as a | |
294 | voldemort type, then it's members must be compiled before the parent | |
295 | function finishes. */ | |
296 | ||
297 | void visit (TemplateDeclaration *d) | |
298 | { | |
299 | /* Type cannot be directly named outside of the scope it's declared in, so | |
300 | the only way it can be escaped is if the function has auto return. */ | |
301 | FuncDeclaration *fd = d_function_chain ? d_function_chain->function : NULL; | |
302 | ||
303 | if (!fd || !fd->isAuto ()) | |
304 | return; | |
305 | ||
306 | /* Check if the function returns an instantiated type that may contain | |
307 | nested members. Only applies to classes or structs. */ | |
308 | Type *tb = fd->type->nextOf ()->baseElemOf (); | |
309 | ||
310 | while (tb->ty == Tarray || tb->ty == Tpointer) | |
311 | tb = tb->nextOf ()->baseElemOf (); | |
312 | ||
313 | TemplateInstance *ti = NULL; | |
314 | ||
315 | if (tb->ty == Tstruct) | |
89fdaf5a | 316 | ti = tb->isTypeStruct ()->sym->isInstantiated (); |
9dddefef | 317 | else if (tb->ty == Tclass) |
89fdaf5a | 318 | ti = tb->isTypeClass ()->sym->isInstantiated (); |
9dddefef IB |
319 | |
320 | /* Return type is instantiated from this template declaration, walk over | |
321 | all members of the instance. */ | |
322 | if (ti && ti->tempdecl == d) | |
7edc15f2 | 323 | this->build_dsymbol (ti); |
9dddefef IB |
324 | } |
325 | ||
b4c522fa IB |
326 | /* Walk over all members in the instantiated template. */ |
327 | ||
328 | void visit (TemplateInstance *d) | |
329 | { | |
330 | if (isError (d)|| !d->members) | |
331 | return; | |
332 | ||
333 | if (!d->needsCodegen ()) | |
334 | return; | |
335 | ||
2cbc99d1 | 336 | for (size_t i = 0; i < d->members->length; i++) |
7edc15f2 | 337 | this->build_dsymbol ((*d->members)[i]); |
b4c522fa IB |
338 | } |
339 | ||
340 | /* Walk over all members in the mixin template scope. */ | |
341 | ||
342 | void visit (TemplateMixin *d) | |
343 | { | |
344 | if (isError (d)|| !d->members) | |
345 | return; | |
346 | ||
2cbc99d1 | 347 | for (size_t i = 0; i < d->members->length; i++) |
7edc15f2 | 348 | this->build_dsymbol ((*d->members)[i]); |
b4c522fa IB |
349 | } |
350 | ||
351 | /* Write out compiler generated TypeInfo, initializer and functions for the | |
352 | given struct declaration, walking over all static members. */ | |
353 | ||
354 | void visit (StructDeclaration *d) | |
355 | { | |
e64deb74 IB |
356 | if (d->semanticRun >= PASSobj) |
357 | return; | |
358 | ||
b4c522fa IB |
359 | if (d->type->ty == Terror) |
360 | { | |
361 | error_at (make_location_t (d->loc), | |
362 | "had semantic errors when compiling"); | |
363 | return; | |
364 | } | |
365 | ||
366 | /* Add this decl to the current binding level. */ | |
367 | tree ctype = build_ctype (d->type); | |
368 | if (TYPE_NAME (ctype)) | |
369 | d_pushdecl (TYPE_NAME (ctype)); | |
370 | ||
371 | /* Anonymous structs/unions only exist as part of others, | |
372 | do not output forward referenced structs. */ | |
373 | if (d->isAnonymous () || !d->members) | |
374 | return; | |
375 | ||
376 | /* Don't emit any symbols from gcc.attribute module. */ | |
377 | if (gcc_attribute_p (d)) | |
378 | return; | |
379 | ||
380 | /* Generate TypeInfo. */ | |
c0aebc60 IB |
381 | if (have_typeinfo_p (Type::dtypeinfo)) |
382 | create_typeinfo (d->type, NULL); | |
b4c522fa IB |
383 | |
384 | /* Generate static initializer. */ | |
385 | d->sinit = aggregate_initializer_decl (d); | |
386 | DECL_INITIAL (d->sinit) = layout_struct_initializer (d); | |
387 | ||
388 | if (d->isInstantiated ()) | |
389 | d_linkonce_linkage (d->sinit); | |
390 | ||
391 | d_finish_decl (d->sinit); | |
392 | ||
7edc15f2 IB |
393 | /* Put out the members. There might be static constructors in the members |
394 | list, and they cannot be put in separate object files. */ | |
2cbc99d1 | 395 | for (size_t i = 0; i < d->members->length; i++) |
7edc15f2 | 396 | this->build_dsymbol ((*d->members)[i]); |
b4c522fa IB |
397 | |
398 | /* Put out xopEquals, xopCmp and xopHash. */ | |
399 | if (d->xeq && d->xeq != d->xerreq) | |
7edc15f2 | 400 | this->build_dsymbol (d->xeq); |
b4c522fa IB |
401 | |
402 | if (d->xcmp && d->xcmp != d->xerrcmp) | |
7edc15f2 | 403 | this->build_dsymbol (d->xcmp); |
b4c522fa IB |
404 | |
405 | if (d->xhash) | |
7edc15f2 | 406 | this->build_dsymbol (d->xhash); |
e64deb74 IB |
407 | |
408 | d->semanticRun = PASSobj; | |
b4c522fa IB |
409 | } |
410 | ||
411 | /* Finish semantic analysis of functions in vtbl for class CD. */ | |
412 | ||
413 | bool finish_vtable (ClassDeclaration *d) | |
414 | { | |
415 | bool has_errors = false; | |
416 | ||
417 | /* Finish semantic analysis of functions in vtbl[]. */ | |
2cbc99d1 | 418 | for (size_t i = d->vtblOffset (); i < d->vtbl.length; i++) |
b4c522fa IB |
419 | { |
420 | FuncDeclaration *fd = d->vtbl[i]->isFuncDeclaration (); | |
421 | ||
422 | if (!fd || (!fd->fbody && d->isAbstract ())) | |
423 | continue; | |
424 | ||
425 | /* Ensure function has a return value. */ | |
426 | if (!fd->functionSemantic ()) | |
427 | has_errors = true; | |
428 | ||
429 | /* No name hiding to check for. */ | |
430 | if (!d->isFuncHidden (fd) || fd->isFuture ()) | |
431 | continue; | |
432 | ||
433 | /* The function fd is hidden from the view of the class. | |
434 | If it overlaps with any function in the vtbl[], then | |
435 | issue an error. */ | |
2cbc99d1 | 436 | for (size_t j = 1; j < d->vtbl.length; j++) |
b4c522fa IB |
437 | { |
438 | if (j == i) | |
439 | continue; | |
440 | ||
441 | FuncDeclaration *fd2 = d->vtbl[j]->isFuncDeclaration (); | |
442 | if (!fd2->ident->equals (fd->ident)) | |
443 | continue; | |
444 | ||
445 | /* The function is marked as @__future, a deprecation has | |
446 | already been given by the frontend. */ | |
447 | if (fd2->isFuture ()) | |
448 | continue; | |
449 | ||
450 | if (fd->leastAsSpecialized (fd2) || fd2->leastAsSpecialized (fd)) | |
451 | { | |
452 | TypeFunction *tf = (TypeFunction *) fd->type; | |
453 | if (tf->ty == Tfunction) | |
454 | { | |
455 | error_at (make_location_t (fd->loc), "use of %qs", | |
456 | fd->toPrettyChars ()); | |
457 | inform (make_location_t (fd2->loc), "is hidden by %qs", | |
458 | fd2->toPrettyChars ()); | |
459 | inform (make_location_t (d->loc), | |
460 | "use %<alias %s = %s.%s;%> to introduce base class " | |
a9c697b8 | 461 | "overload set", fd->toChars (), |
b4c522fa IB |
462 | fd->parent->toChars (), fd->toChars ()); |
463 | } | |
464 | else | |
465 | { | |
466 | error_at (make_location_t (fd->loc), "use of %qs", | |
467 | fd->toPrettyChars ()); | |
468 | inform (make_location_t (fd2->loc), "is hidden by %qs", | |
469 | fd2->toPrettyChars ()); | |
470 | } | |
471 | ||
472 | has_errors = true; | |
473 | break; | |
474 | } | |
475 | } | |
476 | } | |
477 | ||
478 | return !has_errors; | |
479 | } | |
480 | ||
481 | /* Write out compiler generated TypeInfo, initializer and vtables for the | |
482 | given class declaration, walking over all static members. */ | |
483 | ||
484 | void visit (ClassDeclaration *d) | |
485 | { | |
e64deb74 IB |
486 | if (d->semanticRun >= PASSobj) |
487 | return; | |
488 | ||
b4c522fa IB |
489 | if (d->type->ty == Terror) |
490 | { | |
491 | error_at (make_location_t (d->loc), | |
492 | "had semantic errors when compiling"); | |
493 | return; | |
494 | } | |
495 | ||
496 | if (!d->members) | |
497 | return; | |
498 | ||
499 | /* Put out the members. */ | |
2cbc99d1 | 500 | for (size_t i = 0; i < d->members->length; i++) |
7edc15f2 | 501 | this->build_dsymbol ((*d->members)[i]); |
b4c522fa IB |
502 | |
503 | /* If something goes wrong during final semantic pass, don't bother with | |
504 | the rest as we may have incomplete info. */ | |
505 | if (!this->finish_vtable (d)) | |
506 | return; | |
507 | ||
508 | /* Generate C symbols. */ | |
509 | d->csym = get_classinfo_decl (d); | |
510 | d->vtblsym = get_vtable_decl (d); | |
511 | d->sinit = aggregate_initializer_decl (d); | |
512 | ||
513 | /* Generate static initializer. */ | |
514 | DECL_INITIAL (d->sinit) = layout_class_initializer (d); | |
515 | d_linkonce_linkage (d->sinit); | |
516 | d_finish_decl (d->sinit); | |
517 | ||
518 | /* Put out the TypeInfo. */ | |
c0aebc60 IB |
519 | if (have_typeinfo_p (Type::dtypeinfo)) |
520 | create_typeinfo (d->type, NULL); | |
521 | ||
b4c522fa IB |
522 | DECL_INITIAL (d->csym) = layout_classinfo (d); |
523 | d_linkonce_linkage (d->csym); | |
524 | d_finish_decl (d->csym); | |
525 | ||
526 | /* Put out the vtbl[]. */ | |
527 | vec<constructor_elt, va_gc> *elms = NULL; | |
528 | ||
529 | /* First entry is ClassInfo reference. */ | |
530 | if (d->vtblOffset ()) | |
531 | CONSTRUCTOR_APPEND_ELT (elms, size_zero_node, build_address (d->csym)); | |
532 | ||
2cbc99d1 | 533 | for (size_t i = d->vtblOffset (); i < d->vtbl.length; i++) |
b4c522fa IB |
534 | { |
535 | FuncDeclaration *fd = d->vtbl[i]->isFuncDeclaration (); | |
536 | ||
537 | if (fd && (fd->fbody || !d->isAbstract())) | |
538 | { | |
539 | CONSTRUCTOR_APPEND_ELT (elms, size_int (i), | |
540 | build_address (get_symbol_decl (fd))); | |
541 | } | |
542 | } | |
543 | ||
544 | DECL_INITIAL (d->vtblsym) | |
545 | = build_constructor (TREE_TYPE (d->vtblsym), elms); | |
546 | d_comdat_linkage (d->vtblsym); | |
547 | d_finish_decl (d->vtblsym); | |
548 | ||
549 | /* Add this decl to the current binding level. */ | |
550 | tree ctype = TREE_TYPE (build_ctype (d->type)); | |
551 | if (TYPE_NAME (ctype)) | |
552 | d_pushdecl (TYPE_NAME (ctype)); | |
e64deb74 IB |
553 | |
554 | d->semanticRun = PASSobj; | |
b4c522fa IB |
555 | } |
556 | ||
557 | /* Write out compiler generated TypeInfo and vtables for the given interface | |
558 | declaration, walking over all static members. */ | |
559 | ||
560 | void visit (InterfaceDeclaration *d) | |
561 | { | |
e64deb74 IB |
562 | if (d->semanticRun >= PASSobj) |
563 | return; | |
564 | ||
b4c522fa IB |
565 | if (d->type->ty == Terror) |
566 | { | |
567 | error_at (make_location_t (d->loc), | |
568 | "had semantic errors when compiling"); | |
569 | return; | |
570 | } | |
571 | ||
572 | if (!d->members) | |
573 | return; | |
574 | ||
575 | /* Put out the members. */ | |
2cbc99d1 | 576 | for (size_t i = 0; i < d->members->length; i++) |
7edc15f2 | 577 | this->build_dsymbol ((*d->members)[i]); |
b4c522fa IB |
578 | |
579 | /* Generate C symbols. */ | |
580 | d->csym = get_classinfo_decl (d); | |
581 | ||
582 | /* Put out the TypeInfo. */ | |
c0aebc60 IB |
583 | if (have_typeinfo_p (Type::dtypeinfo)) |
584 | { | |
585 | create_typeinfo (d->type, NULL); | |
7edc15f2 | 586 | this->build_dsymbol (d->type->vtinfo); |
c0aebc60 | 587 | } |
b4c522fa IB |
588 | |
589 | DECL_INITIAL (d->csym) = layout_classinfo (d); | |
590 | d_linkonce_linkage (d->csym); | |
591 | d_finish_decl (d->csym); | |
592 | ||
593 | /* Add this decl to the current binding level. */ | |
594 | tree ctype = TREE_TYPE (build_ctype (d->type)); | |
595 | if (TYPE_NAME (ctype)) | |
596 | d_pushdecl (TYPE_NAME (ctype)); | |
e64deb74 IB |
597 | |
598 | d->semanticRun = PASSobj; | |
b4c522fa IB |
599 | } |
600 | ||
601 | /* Write out compiler generated TypeInfo and initializer for the given | |
602 | enum declaration. */ | |
603 | ||
604 | void visit (EnumDeclaration *d) | |
605 | { | |
606 | if (d->semanticRun >= PASSobj) | |
607 | return; | |
608 | ||
609 | if (d->errors || d->type->ty == Terror) | |
610 | { | |
611 | error_at (make_location_t (d->loc), | |
612 | "had semantic errors when compiling"); | |
613 | return; | |
614 | } | |
615 | ||
616 | if (d->isAnonymous ()) | |
617 | return; | |
618 | ||
619 | /* Generate TypeInfo. */ | |
c0aebc60 IB |
620 | if (have_typeinfo_p (Type::dtypeinfo)) |
621 | create_typeinfo (d->type, NULL); | |
b4c522fa | 622 | |
89fdaf5a | 623 | TypeEnum *tc = d->type->isTypeEnum (); |
b4c522fa IB |
624 | if (tc->sym->members && !d->type->isZeroInit ()) |
625 | { | |
626 | /* Generate static initializer. */ | |
627 | d->sinit = enum_initializer_decl (d); | |
628 | DECL_INITIAL (d->sinit) = build_expr (tc->sym->defaultval, true); | |
629 | ||
630 | if (d->isInstantiated ()) | |
631 | d_linkonce_linkage (d->sinit); | |
632 | ||
633 | d_finish_decl (d->sinit); | |
634 | ||
635 | /* Add this decl to the current binding level. */ | |
636 | tree ctype = build_ctype (d->type); | |
637 | if (TREE_CODE (ctype) == ENUMERAL_TYPE && TYPE_NAME (ctype)) | |
638 | d_pushdecl (TYPE_NAME (ctype)); | |
639 | } | |
640 | ||
641 | d->semanticRun = PASSobj; | |
642 | } | |
643 | ||
644 | /* Finish up a variable declaration and push it into the current scope. | |
645 | This can either be a static, local or manifest constant. */ | |
646 | ||
647 | void visit (VarDeclaration *d) | |
648 | { | |
e64deb74 IB |
649 | if (d->semanticRun >= PASSobj) |
650 | return; | |
651 | ||
b4c522fa IB |
652 | if (d->type->ty == Terror) |
653 | { | |
654 | error_at (make_location_t (d->loc), | |
655 | "had semantic errors when compiling"); | |
656 | return; | |
657 | } | |
658 | ||
659 | if (d->aliassym) | |
660 | { | |
7edc15f2 | 661 | this->build_dsymbol (d->toAlias ()); |
b4c522fa IB |
662 | return; |
663 | } | |
664 | ||
665 | /* Do not store variables we cannot take the address of, | |
666 | but keep the values for purposes of debugging. */ | |
667 | if (!d->canTakeAddressOf ()) | |
668 | { | |
669 | /* Don't know if there is a good way to handle instantiations. */ | |
670 | if (d->isInstantiated ()) | |
671 | return; | |
672 | ||
e4e13e26 IB |
673 | /* Cannot make an expression out of a void initializer. */ |
674 | if (!d->_init || d->_init->isVoidInitializer ()) | |
675 | return; | |
676 | ||
b4c522fa | 677 | tree decl = get_symbol_decl (d); |
b4c522fa IB |
678 | Expression *ie = initializerToExpression (d->_init); |
679 | ||
680 | /* CONST_DECL was initially intended for enumerals and may be used for | |
681 | scalars in general, but not for aggregates. Here a non-constant | |
682 | value is generated anyway so as the CONST_DECL only serves as a | |
683 | placeholder for the value, however the DECL itself should never be | |
684 | referenced in any generated code, or passed to the back-end. */ | |
685 | if (!d->type->isscalar ()) | |
686 | DECL_INITIAL (decl) = build_expr (ie, false); | |
687 | else | |
688 | { | |
689 | DECL_INITIAL (decl) = build_expr (ie, true); | |
690 | d_pushdecl (decl); | |
691 | rest_of_decl_compilation (decl, 1, 0); | |
692 | } | |
693 | } | |
694 | else if (d->isDataseg () && !(d->storage_class & STCextern)) | |
695 | { | |
696 | tree decl = get_symbol_decl (d); | |
697 | ||
698 | /* Duplicated VarDeclarations map to the same symbol. Check if this | |
699 | is the one declaration which will be emitted. */ | |
700 | tree ident = DECL_ASSEMBLER_NAME (decl); | |
701 | if (IDENTIFIER_DSYMBOL (ident) && IDENTIFIER_DSYMBOL (ident) != d) | |
702 | return; | |
703 | ||
704 | /* How big a symbol can be should depend on back-end. */ | |
705 | tree size = build_integer_cst (d->type->size (d->loc), | |
706 | build_ctype (Type::tsize_t)); | |
707 | if (!valid_constant_size_p (size)) | |
708 | { | |
709 | error_at (make_location_t (d->loc), "size is too large"); | |
710 | return; | |
711 | } | |
712 | ||
713 | if (d->_init && !d->_init->isVoidInitializer ()) | |
714 | { | |
715 | Expression *e = initializerToExpression (d->_init, d->type); | |
716 | DECL_INITIAL (decl) = build_expr (e, true); | |
717 | } | |
718 | else | |
719 | { | |
89fdaf5a IB |
720 | if (TypeStruct *ts = d->type->isTypeStruct ()) |
721 | DECL_INITIAL (decl) = layout_struct_initializer (ts->sym); | |
b4c522fa IB |
722 | else |
723 | { | |
724 | Expression *e = d->type->defaultInitLiteral (d->loc); | |
725 | DECL_INITIAL (decl) = build_expr (e, true); | |
726 | } | |
727 | } | |
728 | ||
729 | /* Frontend should have already caught this. */ | |
730 | gcc_assert (!integer_zerop (size) | |
731 | || d->type->toBasetype ()->ty == Tsarray); | |
732 | ||
733 | d_finish_decl (decl); | |
734 | ||
735 | /* Maybe record the var against the current module. */ | |
736 | register_module_decl (d); | |
737 | } | |
738 | else if (!d->isDataseg () && !d->isMember ()) | |
739 | { | |
740 | /* This is needed for VarDeclarations in mixins that are to be local | |
741 | variables of a function. Otherwise, it would be enough to make | |
742 | a check for isVarDeclaration() in DeclarationExp codegen. */ | |
743 | declare_local_var (d); | |
744 | ||
745 | if (d->_init) | |
746 | { | |
747 | tree decl = get_symbol_decl (d); | |
748 | ||
749 | if (!d->_init->isVoidInitializer ()) | |
750 | { | |
751 | ExpInitializer *vinit = d->_init->isExpInitializer (); | |
752 | Expression *ie = initializerToExpression (vinit); | |
753 | tree exp = build_expr (ie); | |
754 | ||
755 | /* Maybe put variable on list of things needing destruction. */ | |
756 | if (d->needsScopeDtor ()) | |
757 | { | |
758 | vec_safe_push (d_function_chain->vars_in_scope, decl); | |
759 | /* Force a TARGET_EXPR to add the corresponding cleanup. */ | |
760 | exp = force_target_expr (compound_expr (exp, decl)); | |
761 | TARGET_EXPR_CLEANUP (exp) = build_expr (d->edtor); | |
762 | } | |
763 | ||
764 | add_stmt (exp); | |
765 | } | |
766 | else if (d->size (d->loc) != 0) | |
767 | { | |
768 | /* Zero-length arrays do not have an initializer. */ | |
769 | warning (OPT_Wuninitialized, "uninitialized variable '%s'", | |
770 | d->ident ? d->ident->toChars () : "(no name)"); | |
771 | } | |
772 | } | |
773 | } | |
e64deb74 IB |
774 | |
775 | d->semanticRun = PASSobj; | |
b4c522fa IB |
776 | } |
777 | ||
778 | /* Generate and compile a static TypeInfo declaration, but only if it is | |
779 | needed in the current compilation. */ | |
780 | ||
781 | void visit (TypeInfoDeclaration *d) | |
782 | { | |
e64deb74 IB |
783 | if (d->semanticRun >= PASSobj) |
784 | return; | |
785 | ||
b4c522fa IB |
786 | if (speculative_type_p (d->tinfo)) |
787 | return; | |
788 | ||
789 | tree t = get_typeinfo_decl (d); | |
790 | DECL_INITIAL (t) = layout_typeinfo (d); | |
791 | d_finish_decl (t); | |
e64deb74 | 792 | d->semanticRun = PASSobj; |
b4c522fa IB |
793 | } |
794 | ||
795 | /* Finish up a function declaration and compile it all the way | |
796 | down to assembler language output. */ | |
797 | ||
798 | void visit (FuncDeclaration *d) | |
799 | { | |
800 | /* Already generated the function. */ | |
801 | if (d->semanticRun >= PASSobj) | |
802 | return; | |
803 | ||
804 | /* Don't emit any symbols from gcc.attribute module. */ | |
805 | if (gcc_attribute_p (d)) | |
806 | return; | |
807 | ||
808 | /* Not emitting unittest functions. */ | |
809 | if (!global.params.useUnitTests && d->isUnitTestDeclaration ()) | |
810 | return; | |
811 | ||
812 | /* Check if any errors occurred when running semantic. */ | |
89fdaf5a | 813 | if (TypeFunction *tf = d->type->isTypeFunction ()) |
b4c522fa | 814 | { |
b4c522fa IB |
815 | if (tf->next == NULL || tf->next->ty == Terror) |
816 | return; | |
817 | } | |
818 | ||
819 | if (d->semantic3Errors) | |
820 | return; | |
821 | ||
822 | if (d->isNested ()) | |
823 | { | |
824 | FuncDeclaration *fdp = d; | |
825 | while (fdp && fdp->isNested ()) | |
826 | { | |
827 | fdp = fdp->toParent2 ()->isFuncDeclaration (); | |
828 | ||
829 | if (fdp == NULL) | |
830 | break; | |
831 | ||
832 | /* Parent failed to compile, but errors were gagged. */ | |
833 | if (fdp->semantic3Errors) | |
834 | return; | |
835 | } | |
836 | } | |
837 | ||
838 | /* Ensure all semantic passes have run. */ | |
839 | if (d->semanticRun < PASSsemantic3) | |
840 | { | |
841 | d->functionSemantic3 (); | |
842 | Module::runDeferredSemantic3 (); | |
843 | } | |
844 | ||
845 | if (global.errors) | |
846 | return; | |
847 | ||
848 | /* Duplicated FuncDeclarations map to the same symbol. Check if this | |
849 | is the one declaration which will be emitted. */ | |
850 | tree fndecl = get_symbol_decl (d); | |
851 | tree ident = DECL_ASSEMBLER_NAME (fndecl); | |
852 | if (IDENTIFIER_DSYMBOL (ident) && IDENTIFIER_DSYMBOL (ident) != d) | |
853 | return; | |
854 | ||
855 | if (!d->fbody) | |
856 | { | |
857 | rest_of_decl_compilation (fndecl, 1, 0); | |
858 | return; | |
859 | } | |
860 | ||
861 | if (global.params.verbose) | |
862 | message ("function %s", d->toPrettyChars ()); | |
863 | ||
864 | /* Start generating code for this function. */ | |
865 | gcc_assert (d->semanticRun == PASSsemantic3done); | |
866 | d->semanticRun = PASSobj; | |
867 | ||
868 | tree old_context = start_function (d); | |
869 | ||
870 | tree parm_decl = NULL_TREE; | |
871 | tree param_list = NULL_TREE; | |
872 | ||
873 | /* Special arguments... */ | |
874 | ||
875 | /* 'this' parameter: | |
876 | For nested functions, D still generates a vthis, but it | |
877 | should not be referenced in any expression. */ | |
878 | if (d->vthis) | |
879 | { | |
880 | parm_decl = get_symbol_decl (d->vthis); | |
881 | DECL_ARTIFICIAL (parm_decl) = 1; | |
882 | TREE_READONLY (parm_decl) = 1; | |
883 | ||
884 | if (d->vthis->type == Type::tvoidptr) | |
885 | { | |
886 | /* Replace generic pointer with back-end closure type | |
887 | (this wins for gdb). */ | |
888 | tree frame_type = FRAMEINFO_TYPE (get_frameinfo (d)); | |
889 | gcc_assert (frame_type != NULL_TREE); | |
890 | TREE_TYPE (parm_decl) = build_pointer_type (frame_type); | |
891 | } | |
892 | ||
893 | param_list = chainon (param_list, parm_decl); | |
894 | d_function_chain->static_chain = parm_decl; | |
895 | } | |
896 | ||
897 | /* _arguments parameter. */ | |
898 | if (d->v_arguments) | |
899 | { | |
900 | parm_decl = get_symbol_decl (d->v_arguments); | |
901 | param_list = chainon (param_list, parm_decl); | |
902 | } | |
903 | ||
904 | /* formal function parameters. */ | |
2cbc99d1 | 905 | size_t n_parameters = d->parameters ? d->parameters->length : 0; |
b4c522fa IB |
906 | |
907 | for (size_t i = 0; i < n_parameters; i++) | |
908 | { | |
909 | VarDeclaration *param = (*d->parameters)[i]; | |
910 | parm_decl = get_symbol_decl (param); | |
911 | /* Chain them in the correct order. */ | |
912 | param_list = chainon (param_list, parm_decl); | |
913 | } | |
914 | ||
915 | DECL_ARGUMENTS (fndecl) = param_list; | |
c50eadba | 916 | DECL_IN_UNITTEST_CONDITION_P (fndecl) = this->in_version_unittest_; |
b4c522fa IB |
917 | rest_of_decl_compilation (fndecl, 1, 0); |
918 | ||
919 | /* If this is a member function that nested (possibly indirectly) in another | |
920 | function, construct an expession for this member function's static chain | |
921 | by going through parent link of nested classes. */ | |
922 | if (d->isThis ()) | |
923 | { | |
924 | AggregateDeclaration *ad = d->isThis (); | |
925 | tree this_tree = get_symbol_decl (d->vthis); | |
926 | ||
927 | while (ad->isNested ()) | |
928 | { | |
929 | Dsymbol *pd = ad->toParent2 (); | |
930 | tree vthis_field = get_symbol_decl (ad->vthis); | |
931 | this_tree = component_ref (build_deref (this_tree), vthis_field); | |
932 | ||
933 | ad = pd->isAggregateDeclaration (); | |
934 | if (ad == NULL) | |
935 | { | |
936 | cfun->language->static_chain = this_tree; | |
937 | break; | |
938 | } | |
939 | } | |
940 | } | |
941 | ||
942 | /* May change cfun->static_chain. */ | |
943 | build_closure (d); | |
944 | ||
945 | if (d->vresult) | |
946 | declare_local_var (d->vresult); | |
947 | ||
948 | if (d->v_argptr) | |
949 | push_stmt_list (); | |
950 | ||
951 | /* Named return value optimisation support for D. | |
952 | Implemented by overriding all the RETURN_EXPRs and replacing all | |
953 | occurrences of VAR with the RESULT_DECL for the function. | |
954 | This is only worth doing for functions that can return in memory. */ | |
955 | if (d->nrvo_can) | |
956 | { | |
957 | tree restype = TREE_TYPE (DECL_RESULT (fndecl)); | |
958 | ||
959 | if (!AGGREGATE_TYPE_P (restype)) | |
960 | d->nrvo_can = 0; | |
961 | else | |
962 | d->nrvo_can = aggregate_value_p (restype, fndecl); | |
963 | } | |
964 | ||
965 | if (d->nrvo_can) | |
966 | { | |
967 | tree resdecl = DECL_RESULT (fndecl); | |
968 | ||
969 | TREE_TYPE (resdecl) | |
970 | = build_reference_type (TREE_TYPE (resdecl)); | |
971 | DECL_BY_REFERENCE (resdecl) = 1; | |
972 | TREE_ADDRESSABLE (resdecl) = 0; | |
973 | relayout_decl (resdecl); | |
974 | ||
975 | if (d->nrvo_var) | |
976 | { | |
977 | tree var = get_symbol_decl (d->nrvo_var); | |
978 | ||
979 | /* Copy name from VAR to RESULT. */ | |
980 | DECL_NAME (resdecl) = DECL_NAME (var); | |
981 | /* Don't forget that we take its address. */ | |
982 | TREE_ADDRESSABLE (var) = 1; | |
983 | resdecl = build_deref (resdecl); | |
984 | ||
985 | SET_DECL_VALUE_EXPR (var, resdecl); | |
986 | DECL_HAS_VALUE_EXPR_P (var) = 1; | |
987 | SET_DECL_LANG_NRVO (var, resdecl); | |
988 | } | |
989 | } | |
990 | ||
991 | build_function_body (d); | |
992 | ||
993 | /* Initialize the _argptr variable. */ | |
994 | if (d->v_argptr) | |
995 | { | |
996 | tree body = pop_stmt_list (); | |
997 | tree var = get_decl_tree (d->v_argptr); | |
998 | var = build_address (var); | |
999 | ||
1000 | tree init = build_call_expr (builtin_decl_explicit (BUILT_IN_VA_START), | |
1001 | 2, var, parm_decl); | |
1002 | declare_local_var (d->v_argptr); | |
1003 | add_stmt (init); | |
1004 | ||
1005 | tree cleanup = build_call_expr (builtin_decl_explicit (BUILT_IN_VA_END), | |
1006 | 1, var); | |
1007 | add_stmt (build2 (TRY_FINALLY_EXPR, void_type_node, body, cleanup)); | |
1008 | } | |
1009 | ||
1010 | finish_function (old_context); | |
1011 | ||
1012 | /* Maybe record the function against the current module. */ | |
1013 | register_module_decl (d); | |
1014 | } | |
1015 | }; | |
1016 | ||
1017 | /* Main entry point for the DeclVisitor interface to send | |
1018 | the Declaration AST class D to GCC back-end. */ | |
1019 | ||
1020 | void | |
1021 | build_decl_tree (Dsymbol *d) | |
1022 | { | |
1023 | location_t saved_location = input_location; | |
1024 | ||
1025 | /* Set input location, empty DECL_SOURCE_FILE can crash debug generator. */ | |
1026 | if (d->loc.filename) | |
1027 | input_location = make_location_t (d->loc); | |
1028 | else | |
1029 | input_location = make_location_t (Loc ("<no_file>", 1, 0)); | |
1030 | ||
1031 | DeclVisitor v = DeclVisitor (); | |
7edc15f2 | 1032 | v.build_dsymbol (d); |
b4c522fa IB |
1033 | |
1034 | input_location = saved_location; | |
1035 | } | |
1036 | ||
1037 | /* Return the decl for the symbol, create it if it doesn't already exist. */ | |
1038 | ||
1039 | tree | |
1040 | get_symbol_decl (Declaration *decl) | |
1041 | { | |
1042 | if (decl->csym) | |
1043 | return decl->csym; | |
1044 | ||
1045 | /* Deal with placeholder symbols immediately: | |
1046 | SymbolDeclaration is used as a shell around an initializer symbol. */ | |
1047 | SymbolDeclaration *sd = decl->isSymbolDeclaration (); | |
1048 | if (sd) | |
1049 | { | |
1050 | decl->csym = aggregate_initializer_decl (sd->dsym); | |
1051 | return decl->csym; | |
1052 | } | |
1053 | ||
1054 | /* Global static TypeInfo declaration. */ | |
1055 | if (decl->isTypeInfoDeclaration ()) | |
1056 | return get_typeinfo_decl ((TypeInfoDeclaration *) decl); | |
1057 | ||
1058 | /* FuncAliasDeclaration is used to import functions from another scope. */ | |
1059 | FuncAliasDeclaration *fad = decl->isFuncAliasDeclaration (); | |
1060 | if (fad) | |
1061 | { | |
1062 | decl->csym = get_symbol_decl (fad->funcalias); | |
1063 | return decl->csym; | |
1064 | } | |
1065 | ||
1066 | /* It is possible for a field declaration symbol to be requested | |
1067 | before the parent type has been built. */ | |
1068 | if (decl->isField ()) | |
1069 | { | |
1070 | AggregateDeclaration *ad = decl->toParent ()->isAggregateDeclaration (); | |
1071 | gcc_assert (ad != NULL); | |
1072 | ||
1073 | /* Finishing off the type should create the associated FIELD_DECL. */ | |
1074 | build_ctype (ad->type); | |
1075 | gcc_assert (decl->csym != NULL); | |
1076 | ||
1077 | return decl->csym; | |
1078 | } | |
1079 | ||
1080 | /* Build the tree for the symbol. */ | |
1081 | FuncDeclaration *fd = decl->isFuncDeclaration (); | |
1082 | if (fd) | |
1083 | { | |
1084 | /* Run full semantic on functions we need to know about. */ | |
1085 | if (!fd->functionSemantic ()) | |
1086 | { | |
1087 | decl->csym = error_mark_node; | |
1088 | return decl->csym; | |
1089 | } | |
1090 | ||
1091 | decl->csym = build_decl (make_location_t (decl->loc), FUNCTION_DECL, | |
1092 | get_identifier (decl->ident->toChars ()), | |
1093 | NULL_TREE); | |
1094 | ||
1095 | /* Set function type afterwards as there could be self references. */ | |
1096 | TREE_TYPE (decl->csym) = build_ctype (fd->type); | |
1097 | ||
013fca64 IB |
1098 | /* Set DECL_INITIAL now if the function has a definition. */ |
1099 | if (fd->fbody) | |
1100 | DECL_INITIAL (decl->csym) = error_mark_node; | |
1101 | else | |
b4c522fa IB |
1102 | DECL_EXTERNAL (decl->csym) = 1; |
1103 | } | |
1104 | else | |
1105 | { | |
1106 | /* Build the variable declaration. */ | |
1107 | VarDeclaration *vd = decl->isVarDeclaration (); | |
1108 | gcc_assert (vd != NULL); | |
1109 | ||
1110 | tree_code code = vd->isParameter () ? PARM_DECL | |
1111 | : !vd->canTakeAddressOf () ? CONST_DECL | |
1112 | : VAR_DECL; | |
1113 | decl->csym = build_decl (make_location_t (decl->loc), code, | |
1114 | get_identifier (decl->ident->toChars ()), | |
1115 | declaration_type (vd)); | |
1116 | ||
1117 | /* If any alignment was set on the declaration. */ | |
1118 | if (vd->alignment != STRUCTALIGN_DEFAULT) | |
1119 | { | |
1120 | SET_DECL_ALIGN (decl->csym, vd->alignment * BITS_PER_UNIT); | |
1121 | DECL_USER_ALIGN (decl->csym) = 1; | |
1122 | } | |
1123 | ||
1124 | if (vd->storage_class & STCextern) | |
1125 | DECL_EXTERNAL (decl->csym) = 1; | |
1126 | } | |
1127 | ||
1128 | /* Set the declaration mangled identifier if static. */ | |
1129 | if (decl->isCodeseg () || decl->isDataseg ()) | |
1130 | { | |
1131 | tree mangled_name; | |
1132 | ||
98866120 IB |
1133 | if (decl->mangleOverride.length) |
1134 | { | |
1135 | mangled_name = | |
1136 | get_identifier_with_length (decl->mangleOverride.ptr, | |
1137 | decl->mangleOverride.length); | |
1138 | } | |
b4c522fa | 1139 | else |
b5446d0c | 1140 | mangled_name = get_identifier (d_mangle_decl (decl)); |
b4c522fa IB |
1141 | |
1142 | mangled_name = targetm.mangle_decl_assembler_name (decl->csym, | |
1143 | mangled_name); | |
1144 | /* The frontend doesn't handle duplicate definitions of unused symbols | |
1145 | with the same mangle. So a check is done here instead. */ | |
013fca64 | 1146 | if (IDENTIFIER_DSYMBOL (mangled_name)) |
b4c522fa | 1147 | { |
013fca64 IB |
1148 | Declaration *other = IDENTIFIER_DSYMBOL (mangled_name); |
1149 | tree olddecl = decl->csym; | |
1150 | decl->csym = get_symbol_decl (other); | |
b4c522fa | 1151 | |
013fca64 IB |
1152 | /* The current declaration is a prototype or marked extern, merge |
1153 | applied user attributes and return. */ | |
1154 | if (DECL_EXTERNAL (olddecl) && !DECL_INITIAL (olddecl)) | |
1155 | { | |
1156 | apply_user_attributes (decl, decl->csym); | |
b4c522fa IB |
1157 | return decl->csym; |
1158 | } | |
013fca64 IB |
1159 | /* The previous declaration is a prototype or marked extern, set the |
1160 | current declaration as the main reference of the symbol. */ | |
1161 | else if (DECL_EXTERNAL (decl->csym) && !DECL_INITIAL (decl->csym)) | |
1162 | { | |
1163 | IDENTIFIER_DSYMBOL (mangled_name) = decl; | |
1164 | DECL_EXTERNAL (decl->csym) = 0; | |
1165 | } | |
1166 | /* Non-extern, non-templated decls shouldn't be defined twice. */ | |
1167 | else if (!decl->isInstantiated ()) | |
1168 | ScopeDsymbol::multiplyDefined (decl->loc, decl, other); | |
1169 | } | |
1170 | else | |
1171 | { | |
b4c522fa IB |
1172 | IDENTIFIER_PRETTY_NAME (mangled_name) |
1173 | = get_identifier (decl->toPrettyChars (true)); | |
1174 | IDENTIFIER_DSYMBOL (mangled_name) = decl; | |
b4c522fa | 1175 | |
013fca64 IB |
1176 | SET_DECL_ASSEMBLER_NAME (decl->csym, mangled_name); |
1177 | } | |
b4c522fa IB |
1178 | } |
1179 | ||
1180 | DECL_LANG_SPECIFIC (decl->csym) = build_lang_decl (decl); | |
1181 | DECL_CONTEXT (decl->csym) = d_decl_context (decl); | |
1182 | ||
1183 | if (TREE_CODE (decl->csym) == PARM_DECL) | |
1184 | { | |
1185 | /* Pass non-trivial structs by invisible reference. */ | |
1186 | if (TREE_ADDRESSABLE (TREE_TYPE (decl->csym))) | |
1187 | { | |
1188 | tree argtype = build_reference_type (TREE_TYPE (decl->csym)); | |
1189 | argtype = build_qualified_type (argtype, TYPE_QUAL_RESTRICT); | |
1190 | gcc_assert (!DECL_BY_REFERENCE (decl->csym)); | |
1191 | TREE_TYPE (decl->csym) = argtype; | |
1192 | DECL_BY_REFERENCE (decl->csym) = 1; | |
1193 | TREE_ADDRESSABLE (decl->csym) = 0; | |
1194 | relayout_decl (decl->csym); | |
1195 | decl->storage_class |= STCref; | |
1196 | } | |
1197 | ||
1198 | DECL_ARG_TYPE (decl->csym) = TREE_TYPE (decl->csym); | |
1199 | gcc_assert (TREE_CODE (DECL_CONTEXT (decl->csym)) == FUNCTION_DECL); | |
1200 | } | |
1201 | else if (TREE_CODE (decl->csym) == CONST_DECL) | |
1202 | { | |
1203 | /* Manifest constants have no address in memory. */ | |
1204 | TREE_CONSTANT (decl->csym) = 1; | |
1205 | TREE_READONLY (decl->csym) = 1; | |
1206 | } | |
1207 | else if (TREE_CODE (decl->csym) == FUNCTION_DECL) | |
1208 | { | |
1209 | /* The real function type may differ from its declaration. */ | |
1210 | tree fntype = TREE_TYPE (decl->csym); | |
1211 | tree newfntype = NULL_TREE; | |
1212 | ||
1213 | if (fd->isNested ()) | |
1214 | { | |
1215 | /* Add an extra argument for the frame/closure pointer, this is also | |
1216 | required to be compatible with D delegates. */ | |
1217 | newfntype = build_vthis_function (void_type_node, fntype); | |
1218 | } | |
1219 | else if (fd->isThis ()) | |
1220 | { | |
1221 | /* Add an extra argument for the 'this' parameter. The handle type is | |
1222 | used even if there is no debug info. It is needed to make sure | |
1223 | virtual member functions are not called statically. */ | |
1224 | AggregateDeclaration *ad = fd->isMember2 (); | |
1225 | tree handle = build_ctype (ad->handleType ()); | |
1226 | ||
1227 | /* If handle is a pointer type, get record type. */ | |
1228 | if (!ad->isStructDeclaration ()) | |
1229 | handle = TREE_TYPE (handle); | |
1230 | ||
1231 | newfntype = build_vthis_function (handle, fntype); | |
1232 | ||
1233 | /* Set the vindex on virtual functions. */ | |
1234 | if (fd->isVirtual () && fd->vtblIndex != -1) | |
1235 | { | |
1236 | DECL_VINDEX (decl->csym) = size_int (fd->vtblIndex); | |
1237 | DECL_VIRTUAL_P (decl->csym) = 1; | |
1238 | } | |
1239 | } | |
1240 | else if (fd->isMain () || fd->isCMain ()) | |
1241 | { | |
1242 | /* The main function is named 'D main' to distinguish from C main. */ | |
1243 | if (fd->isMain ()) | |
1244 | DECL_NAME (decl->csym) = get_identifier (fd->toPrettyChars (true)); | |
1245 | ||
1246 | /* 'void main' is implicitly converted to returning an int. */ | |
1247 | newfntype = build_function_type (d_int_type, TYPE_ARG_TYPES (fntype)); | |
1248 | } | |
1249 | ||
1250 | if (newfntype != NULL_TREE) | |
1251 | { | |
1252 | /* Copy the old attributes from the original type. */ | |
1253 | TYPE_ATTRIBUTES (newfntype) = TYPE_ATTRIBUTES (fntype); | |
1254 | TYPE_LANG_SPECIFIC (newfntype) = TYPE_LANG_SPECIFIC (fntype); | |
1255 | TREE_ADDRESSABLE (newfntype) = TREE_ADDRESSABLE (fntype); | |
1256 | TREE_TYPE (decl->csym) = newfntype; | |
1257 | d_keep (newfntype); | |
1258 | } | |
1259 | ||
1260 | /* Miscellaneous function flags. */ | |
1261 | if (fd->isMember2 () || fd->isFuncLiteralDeclaration ()) | |
1262 | { | |
1263 | /* See grokmethod in cp/decl.c. Maybe we shouldn't be setting inline | |
1264 | flags without reason or proper handling. */ | |
1265 | DECL_DECLARED_INLINE_P (decl->csym) = 1; | |
1266 | DECL_NO_INLINE_WARNING_P (decl->csym) = 1; | |
1267 | } | |
1268 | ||
67e3020b IB |
1269 | /* In [pragma/inline], functions decorated with 'pragma(inline)' affects |
1270 | whether they are inlined or not. */ | |
1271 | if (fd->inlining == PINLINEalways) | |
1272 | DECL_DECLARED_INLINE_P (decl->csym) = 1; | |
1273 | else if (fd->inlining == PINLINEnever) | |
1274 | DECL_UNINLINABLE (decl->csym) = 1; | |
1275 | ||
b4c522fa IB |
1276 | /* Function was declared 'naked'. */ |
1277 | if (fd->naked) | |
1278 | { | |
1279 | insert_decl_attribute (decl->csym, "naked"); | |
1280 | DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl->csym) = 1; | |
1281 | } | |
1282 | ||
1283 | /* Vector array operations are always compiler generated. */ | |
1284 | if (fd->isArrayOp) | |
1285 | { | |
1286 | TREE_PUBLIC (decl->csym) = 1; | |
1287 | DECL_ARTIFICIAL (decl->csym) = 1; | |
1288 | DECL_DECLARED_INLINE_P (decl->csym) = 1; | |
1289 | d_comdat_linkage (decl->csym); | |
1290 | } | |
1291 | ||
1292 | /* And so are ensure and require contracts. */ | |
1293 | if (fd->ident == Identifier::idPool ("ensure") | |
1294 | || fd->ident == Identifier::idPool ("require")) | |
1295 | { | |
1296 | DECL_ARTIFICIAL (decl->csym) = 1; | |
1297 | TREE_PUBLIC (decl->csym) = 1; | |
1298 | } | |
1299 | ||
1300 | if (decl->storage_class & STCfinal) | |
1301 | DECL_FINAL_P (decl->csym) = 1; | |
1302 | ||
1303 | /* Check whether this function is expanded by the frontend. */ | |
1304 | DECL_INTRINSIC_CODE (decl->csym) = INTRINSIC_NONE; | |
1305 | maybe_set_intrinsic (fd); | |
1306 | ||
1307 | /* For nested functions in particular, unnest fndecl in the cgraph, as | |
1308 | all static chain passing is handled by the front-end. Do this even | |
1309 | if we are not emitting the body. */ | |
1310 | struct cgraph_node *node = cgraph_node::get_create (decl->csym); | |
1311 | if (node->origin) | |
1312 | node->unnest (); | |
1313 | } | |
1314 | ||
1315 | /* Mark compiler generated temporaries as artificial. */ | |
1316 | if (decl->storage_class & STCtemp) | |
1317 | DECL_ARTIFICIAL (decl->csym) = 1; | |
1318 | ||
1319 | /* Propagate shared on the decl. */ | |
1320 | if (TYPE_SHARED (TREE_TYPE (decl->csym))) | |
1321 | TREE_ADDRESSABLE (decl->csym) = 1; | |
1322 | ||
1323 | /* Symbol was marked volatile. */ | |
1324 | if (decl->storage_class & STCvolatile) | |
1325 | TREE_THIS_VOLATILE (decl->csym) = 1; | |
1326 | ||
1327 | /* Protection attributes are used by the debugger. */ | |
0a2ee409 | 1328 | if (decl->protection.kind == Prot::private_) |
b4c522fa | 1329 | TREE_PRIVATE (decl->csym) = 1; |
0a2ee409 | 1330 | else if (decl->protection.kind == Prot::protected_) |
b4c522fa IB |
1331 | TREE_PROTECTED (decl->csym) = 1; |
1332 | ||
1333 | /* Likewise, so could the deprecated attribute. */ | |
1334 | if (decl->storage_class & STCdeprecated) | |
1335 | TREE_DEPRECATED (decl->csym) = 1; | |
1336 | ||
1337 | #if TARGET_DLLIMPORT_DECL_ATTRIBUTES | |
1338 | /* Have to test for import first. */ | |
1339 | if (decl->isImportedSymbol ()) | |
1340 | { | |
1341 | insert_decl_attribute (decl->csym, "dllimport"); | |
1342 | DECL_DLLIMPORT_P (decl->csym) = 1; | |
1343 | } | |
1344 | else if (decl->isExport ()) | |
1345 | insert_decl_attribute (decl->csym, "dllexport"); | |
1346 | #endif | |
1347 | ||
1348 | if (decl->isDataseg () || decl->isCodeseg () || decl->isThreadlocal ()) | |
1349 | { | |
1350 | /* Set TREE_PUBLIC by default, but allow private template to override. */ | |
1351 | if (!fd || !fd->isNested ()) | |
1352 | TREE_PUBLIC (decl->csym) = 1; | |
1353 | ||
1354 | TREE_STATIC (decl->csym) = 1; | |
1355 | /* The decl has not been defined -- yet. */ | |
1356 | DECL_EXTERNAL (decl->csym) = 1; | |
1357 | ||
1358 | if (decl->isInstantiated ()) | |
1359 | d_linkonce_linkage (decl->csym); | |
1360 | } | |
1361 | ||
1362 | /* Symbol is going in thread local storage. */ | |
1363 | if (decl->isThreadlocal () && !DECL_ARTIFICIAL (decl->csym)) | |
1364 | { | |
1365 | if (global.params.vtls) | |
1366 | message (decl->loc, "`%s` is thread local", decl->toChars ()); | |
1367 | ||
1368 | set_decl_tls_model (decl->csym, decl_default_tls_model (decl->csym)); | |
1369 | } | |
1370 | ||
1371 | /* Apply any user attributes that may affect semantic meaning. */ | |
013fca64 | 1372 | apply_user_attributes (decl, decl->csym); |
b4c522fa IB |
1373 | |
1374 | /* %% Probably should be a little more intelligent about setting this. */ | |
1375 | TREE_USED (decl->csym) = 1; | |
1376 | d_keep (decl->csym); | |
1377 | ||
1378 | return decl->csym; | |
1379 | } | |
1380 | ||
1381 | /* Returns a declaration for a VAR_DECL. Used to create compiler-generated | |
1382 | global variables. */ | |
1383 | ||
1384 | tree | |
1385 | declare_extern_var (tree ident, tree type) | |
1386 | { | |
1387 | /* If the VAR_DECL has already been declared, return it. */ | |
1388 | if (IDENTIFIER_DECL_TREE (ident)) | |
1389 | return IDENTIFIER_DECL_TREE (ident); | |
1390 | ||
1391 | tree name = IDENTIFIER_PRETTY_NAME (ident) | |
1392 | ? IDENTIFIER_PRETTY_NAME (ident) : ident; | |
1393 | tree decl = build_decl (input_location, VAR_DECL, name, type); | |
1394 | ||
1395 | IDENTIFIER_DECL_TREE (ident) = decl; | |
1396 | d_keep (decl); | |
1397 | ||
1398 | SET_DECL_ASSEMBLER_NAME (decl, ident); | |
1399 | DECL_ARTIFICIAL (decl) = 1; | |
1400 | TREE_STATIC (decl) = 1; | |
1401 | TREE_PUBLIC (decl) = 1; | |
1402 | ||
1403 | /* The decl has not been defined -- yet. */ | |
1404 | DECL_EXTERNAL (decl) = 1; | |
1405 | ||
1406 | return decl; | |
1407 | } | |
1408 | ||
1409 | /* Add local variable VAR into the current function body. */ | |
1410 | ||
1411 | void | |
1412 | declare_local_var (VarDeclaration *var) | |
1413 | { | |
1414 | gcc_assert (!var->isDataseg () && !var->isMember ()); | |
1415 | gcc_assert (current_function_decl != NULL_TREE); | |
1416 | ||
1417 | FuncDeclaration *fd = cfun->language->function; | |
1418 | tree decl = get_symbol_decl (var); | |
1419 | ||
1420 | gcc_assert (!TREE_STATIC (decl)); | |
1421 | d_pushdecl (decl); | |
1422 | DECL_CONTEXT (decl) = current_function_decl; | |
1423 | ||
1424 | /* Compiler generated symbols. */ | |
1425 | if (var == fd->vresult || var == fd->v_argptr) | |
1426 | DECL_ARTIFICIAL (decl) = 1; | |
1427 | ||
1428 | if (DECL_LANG_FRAME_FIELD (decl)) | |
1429 | { | |
1430 | /* Fixes debugging local variables. */ | |
1431 | SET_DECL_VALUE_EXPR (decl, get_decl_tree (var)); | |
1432 | DECL_HAS_VALUE_EXPR_P (decl) = 1; | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | /* Return an unnamed local temporary of type TYPE. */ | |
1437 | ||
1438 | tree | |
1439 | build_local_temp (tree type) | |
1440 | { | |
1441 | tree decl = build_decl (input_location, VAR_DECL, NULL_TREE, type); | |
1442 | ||
1443 | DECL_CONTEXT (decl) = current_function_decl; | |
1444 | DECL_ARTIFICIAL (decl) = 1; | |
1445 | DECL_IGNORED_P (decl) = 1; | |
1446 | d_pushdecl (decl); | |
1447 | ||
1448 | return decl; | |
1449 | } | |
1450 | ||
1451 | /* Return the correct decl to be used for DECL. For VAR_DECLs, this could | |
1452 | instead be a FIELD_DECL from a closure, or a RESULT_DECL from a named return | |
1453 | value. For PARM_DECLs, this could be a FIELD_DECL for a non-local `this'. | |
1454 | For all other kinds of decls, this just returns the result of | |
1455 | get_symbol_decl(). */ | |
1456 | ||
1457 | tree | |
1458 | get_decl_tree (Declaration *decl) | |
1459 | { | |
1460 | tree t = get_symbol_decl (decl); | |
1461 | FuncDeclaration *fd = cfun ? cfun->language->function : NULL; | |
1462 | VarDeclaration *vd = decl->isVarDeclaration (); | |
1463 | ||
1464 | /* If cfun is NULL, then this is a global static. */ | |
1465 | if (vd == NULL || fd == NULL) | |
1466 | return t; | |
1467 | ||
1468 | /* Get the named return value. */ | |
1469 | if (DECL_LANG_NRVO (t)) | |
1470 | return DECL_LANG_NRVO (t); | |
1471 | ||
1472 | /* Get the closure holding the var decl. */ | |
1473 | if (DECL_LANG_FRAME_FIELD (t)) | |
1474 | { | |
1475 | FuncDeclaration *parent = vd->toParent2 ()->isFuncDeclaration (); | |
1476 | tree frame_ref = get_framedecl (fd, parent); | |
1477 | ||
1478 | return component_ref (build_deref (frame_ref), | |
1479 | DECL_LANG_FRAME_FIELD (t)); | |
1480 | } | |
1481 | ||
1482 | /* Get the non-local 'this' value by going through parent link | |
1483 | of nested classes, this routine pretty much undoes what | |
1484 | getRightThis in the frontend removes from codegen. */ | |
1485 | if (vd->parent != fd && vd->isThisDeclaration ()) | |
1486 | { | |
1487 | /* Find the first parent that is a member function. */ | |
1488 | while (!fd->isMember2 ()) | |
1489 | { | |
1490 | gcc_assert (fd->vthis); | |
1491 | fd = fd->toParent2 ()->isFuncDeclaration (); | |
1492 | gcc_assert (fd != NULL); | |
1493 | } | |
1494 | ||
1495 | AggregateDeclaration *ad = fd->isThis (); | |
1496 | gcc_assert (ad != NULL); | |
1497 | ||
1498 | t = get_decl_tree (fd->vthis); | |
1499 | Dsymbol *outer = fd; | |
1500 | ||
1501 | while (outer != vd->parent) | |
1502 | { | |
1503 | gcc_assert (ad != NULL); | |
1504 | outer = ad->toParent2 (); | |
1505 | ||
1506 | /* Get the this->this parent link. */ | |
1507 | tree vfield = get_symbol_decl (ad->vthis); | |
1508 | t = component_ref (build_deref (t), vfield); | |
1509 | ||
1510 | ad = outer->isAggregateDeclaration (); | |
1511 | if (ad != NULL) | |
1512 | continue; | |
1513 | ||
1514 | fd = outer->isFuncDeclaration (); | |
1515 | while (fd != NULL) | |
1516 | { | |
1517 | /* If outer function creates a closure, then the 'this' | |
1518 | value would be the closure pointer, and the real | |
1519 | 'this' the first field of that closure. */ | |
1520 | tree ff = get_frameinfo (fd); | |
1521 | if (FRAMEINFO_CREATES_FRAME (ff)) | |
1522 | { | |
1523 | t = build_nop (build_pointer_type (FRAMEINFO_TYPE (ff)), t); | |
1524 | t = indirect_ref (build_ctype (fd->vthis->type), t); | |
1525 | } | |
1526 | ||
1527 | if (fd == vd->parent) | |
1528 | break; | |
1529 | ||
1530 | /* Continue looking for the right `this'. */ | |
1531 | outer = outer->toParent2 (); | |
1532 | fd = outer->isFuncDeclaration (); | |
1533 | } | |
1534 | ||
1535 | ad = outer->isAggregateDeclaration (); | |
1536 | } | |
1537 | ||
1538 | return t; | |
1539 | } | |
1540 | ||
1541 | /* Auto variable that the back end will handle for us. */ | |
1542 | return t; | |
1543 | } | |
1544 | ||
1545 | /* Finish up a variable declaration and compile it all the way to | |
1546 | the assembler language output. */ | |
1547 | ||
1548 | void | |
1549 | d_finish_decl (tree decl) | |
1550 | { | |
1551 | gcc_assert (!error_operand_p (decl)); | |
1552 | ||
1553 | /* We are sending this symbol to object file, can't be extern. */ | |
1554 | TREE_STATIC (decl) = 1; | |
1555 | DECL_EXTERNAL (decl) = 0; | |
1556 | ||
1557 | /* Update the TLS model as the linkage has been modified. */ | |
1558 | if (DECL_THREAD_LOCAL_P (decl)) | |
1559 | set_decl_tls_model (decl, decl_default_tls_model (decl)); | |
1560 | ||
1561 | relayout_decl (decl); | |
1562 | ||
1563 | if (flag_checking && DECL_INITIAL (decl)) | |
1564 | { | |
1565 | /* Initializer must never be bigger than symbol size. */ | |
1566 | dinteger_t tsize = int_size_in_bytes (TREE_TYPE (decl)); | |
1567 | dinteger_t dtsize = int_size_in_bytes (TREE_TYPE (DECL_INITIAL (decl))); | |
1568 | ||
1569 | if (tsize < dtsize) | |
1570 | { | |
1571 | tree name = DECL_ASSEMBLER_NAME (decl); | |
1572 | ||
1573 | internal_error ("Mismatch between declaration %qE size (%wd) and " | |
1574 | "its initializer size (%wd).", | |
1575 | IDENTIFIER_PRETTY_NAME (name) | |
1576 | ? IDENTIFIER_PRETTY_NAME (name) : name, | |
1577 | tsize, dtsize); | |
1578 | } | |
1579 | } | |
1580 | ||
1581 | /* Without weak symbols, symbol should be put in .common, but that can't | |
1582 | be done if there is a nonzero initializer. */ | |
1583 | if (DECL_COMDAT (decl) && DECL_COMMON (decl) | |
1584 | && initializer_zerop (DECL_INITIAL (decl))) | |
1585 | DECL_INITIAL (decl) = error_mark_node; | |
1586 | ||
1587 | /* Add this decl to the current binding level. */ | |
1588 | d_pushdecl (decl); | |
1589 | ||
1590 | rest_of_decl_compilation (decl, 1, 0); | |
1591 | } | |
1592 | ||
1593 | /* Thunk code is based on g++. */ | |
1594 | ||
1595 | static int thunk_labelno; | |
1596 | ||
1597 | /* Create a static alias to function. */ | |
1598 | ||
1599 | static tree | |
1600 | make_alias_for_thunk (tree function) | |
1601 | { | |
1602 | tree alias; | |
1603 | char buf[256]; | |
1604 | ||
1605 | /* Thunks may reference extern functions which cannot be aliased. */ | |
1606 | if (DECL_EXTERNAL (function)) | |
1607 | return function; | |
1608 | ||
1609 | targetm.asm_out.generate_internal_label (buf, "LTHUNK", thunk_labelno); | |
1610 | thunk_labelno++; | |
1611 | ||
1612 | alias = build_decl (DECL_SOURCE_LOCATION (function), FUNCTION_DECL, | |
1613 | get_identifier (buf), TREE_TYPE (function)); | |
1614 | DECL_LANG_SPECIFIC (alias) = DECL_LANG_SPECIFIC (function); | |
1615 | lang_hooks.dup_lang_specific_decl (alias); | |
1616 | DECL_CONTEXT (alias) = NULL_TREE; | |
1617 | TREE_READONLY (alias) = TREE_READONLY (function); | |
1618 | TREE_THIS_VOLATILE (alias) = TREE_THIS_VOLATILE (function); | |
1619 | TREE_PUBLIC (alias) = 0; | |
1620 | ||
1621 | DECL_EXTERNAL (alias) = 0; | |
1622 | DECL_ARTIFICIAL (alias) = 1; | |
1623 | ||
1624 | DECL_DECLARED_INLINE_P (alias) = 0; | |
1625 | DECL_INITIAL (alias) = error_mark_node; | |
1626 | DECL_ARGUMENTS (alias) = copy_list (DECL_ARGUMENTS (function)); | |
1627 | ||
1628 | TREE_ADDRESSABLE (alias) = 1; | |
1629 | TREE_USED (alias) = 1; | |
1630 | SET_DECL_ASSEMBLER_NAME (alias, DECL_NAME (alias)); | |
1631 | ||
1632 | if (!flag_syntax_only) | |
1633 | { | |
1634 | cgraph_node *aliasn; | |
1635 | aliasn = cgraph_node::create_same_body_alias (alias, function); | |
1636 | gcc_assert (aliasn != NULL); | |
1637 | } | |
1638 | return alias; | |
1639 | } | |
1640 | ||
1641 | /* Emit the definition of a D vtable thunk. */ | |
1642 | ||
1643 | static void | |
1644 | finish_thunk (tree thunk, tree function) | |
1645 | { | |
1646 | /* Setup how D thunks are outputted. */ | |
1647 | int fixed_offset = -THUNK_LANG_OFFSET (thunk); | |
1648 | bool this_adjusting = true; | |
1649 | tree alias; | |
1650 | ||
1651 | if (TARGET_USE_LOCAL_THUNK_ALIAS_P (function)) | |
1652 | alias = make_alias_for_thunk (function); | |
1653 | else | |
1654 | alias = function; | |
1655 | ||
1656 | TREE_ADDRESSABLE (function) = 1; | |
1657 | TREE_USED (function) = 1; | |
1658 | ||
1659 | if (flag_syntax_only) | |
1660 | { | |
1661 | TREE_ASM_WRITTEN (thunk) = 1; | |
1662 | return; | |
1663 | } | |
1664 | ||
1665 | if (TARGET_USE_LOCAL_THUNK_ALIAS_P (function) | |
1666 | && targetm_common.have_named_sections) | |
1667 | { | |
1668 | tree fn = function; | |
1669 | symtab_node *symbol = symtab_node::get (function); | |
1670 | ||
1671 | if (symbol != NULL && symbol->alias) | |
1672 | { | |
1673 | if (symbol->analyzed) | |
1674 | fn = symtab_node::get (function)->ultimate_alias_target ()->decl; | |
1675 | else | |
1676 | fn = symtab_node::get (function)->alias_target; | |
1677 | } | |
1678 | resolve_unique_section (fn, 0, flag_function_sections); | |
1679 | ||
1680 | if (DECL_SECTION_NAME (fn) != NULL && DECL_ONE_ONLY (fn)) | |
1681 | { | |
1682 | resolve_unique_section (thunk, 0, flag_function_sections); | |
1683 | ||
1684 | /* Output the thunk into the same section as function. */ | |
1685 | set_decl_section_name (thunk, DECL_SECTION_NAME (fn)); | |
1686 | symtab_node::get (thunk)->implicit_section | |
1687 | = symtab_node::get (fn)->implicit_section; | |
1688 | } | |
1689 | } | |
1690 | ||
1691 | /* Set up cloned argument trees for the thunk. */ | |
1692 | tree t = NULL_TREE; | |
1693 | for (tree a = DECL_ARGUMENTS (function); a; a = DECL_CHAIN (a)) | |
1694 | { | |
1695 | tree x = copy_node (a); | |
1696 | DECL_CHAIN (x) = t; | |
1697 | DECL_CONTEXT (x) = thunk; | |
1698 | SET_DECL_RTL (x, NULL); | |
1699 | DECL_HAS_VALUE_EXPR_P (x) = 0; | |
1700 | TREE_ADDRESSABLE (x) = 0; | |
1701 | t = x; | |
1702 | } | |
1703 | DECL_ARGUMENTS (thunk) = nreverse (t); | |
1704 | TREE_ASM_WRITTEN (thunk) = 1; | |
1705 | ||
1706 | cgraph_node *funcn, *thunk_node; | |
1707 | ||
1708 | funcn = cgraph_node::get_create (function); | |
1709 | gcc_assert (funcn); | |
1710 | thunk_node = funcn->create_thunk (thunk, thunk, this_adjusting, | |
1711 | fixed_offset, 0, 0, 0, alias); | |
1712 | ||
1713 | if (DECL_ONE_ONLY (function)) | |
1714 | thunk_node->add_to_same_comdat_group (funcn); | |
1715 | ||
1716 | /* Target assemble_mi_thunk doesn't work across section boundaries | |
1717 | on many targets, instead force thunk to be expanded in gimple. */ | |
1718 | if (DECL_EXTERNAL (function)) | |
1719 | { | |
1720 | /* cgraph::expand_thunk writes over current_function_decl, so if this | |
1721 | could ever be in use by the codegen pass, we want to know about it. */ | |
1722 | gcc_assert (current_function_decl == NULL_TREE); | |
1723 | ||
1724 | if (!stdarg_p (TREE_TYPE (thunk))) | |
1725 | { | |
1726 | thunk_node->create_edge (funcn, NULL, thunk_node->count); | |
1727 | thunk_node->expand_thunk (false, true); | |
1728 | } | |
1729 | ||
1730 | /* Tell the back-end to not bother inlining the function, this is | |
1731 | assumed not to work as it could be referencing symbols outside | |
1732 | of the current compilation unit. */ | |
1733 | DECL_UNINLINABLE (function) = 1; | |
1734 | } | |
1735 | } | |
1736 | ||
1737 | /* Return a thunk to DECL. Thunks adjust the incoming `this' pointer by OFFSET. | |
1738 | Adjustor thunks are created and pointers to them stored in the method entries | |
1739 | in the vtable in order to set the this pointer to the start of the object | |
1740 | instance corresponding to the implementing method. */ | |
1741 | ||
1742 | tree | |
1743 | make_thunk (FuncDeclaration *decl, int offset) | |
1744 | { | |
1745 | tree function = get_symbol_decl (decl); | |
1746 | ||
1747 | if (!DECL_ARGUMENTS (function) || !DECL_RESULT (function)) | |
1748 | { | |
1749 | /* Compile the function body before generating the thunk, this is done | |
1750 | even if the decl is external to the current module. */ | |
1751 | if (decl->fbody) | |
1752 | build_decl_tree (decl); | |
1753 | else | |
1754 | { | |
1755 | /* Build parameters for functions that are not being compiled, | |
1756 | so that they can be correctly cloned in finish_thunk. */ | |
1757 | tree fntype = TREE_TYPE (function); | |
1758 | tree params = NULL_TREE; | |
1759 | ||
1760 | for (tree t = TYPE_ARG_TYPES (fntype); t; t = TREE_CHAIN (t)) | |
1761 | { | |
1762 | if (t == void_list_node) | |
1763 | break; | |
1764 | ||
1765 | tree param = build_decl (DECL_SOURCE_LOCATION (function), | |
1766 | PARM_DECL, NULL_TREE, TREE_VALUE (t)); | |
1767 | DECL_ARG_TYPE (param) = TREE_TYPE (param); | |
1768 | DECL_ARTIFICIAL (param) = 1; | |
1769 | DECL_IGNORED_P (param) = 1; | |
1770 | DECL_CONTEXT (param) = function; | |
1771 | params = chainon (params, param); | |
1772 | } | |
1773 | ||
1774 | DECL_ARGUMENTS (function) = params; | |
1775 | ||
1776 | /* Also build the result decl, which is needed when force creating | |
1777 | the thunk in gimple inside cgraph_node::expand_thunk. */ | |
1778 | tree resdecl = build_decl (DECL_SOURCE_LOCATION (function), | |
1779 | RESULT_DECL, NULL_TREE, | |
1780 | TREE_TYPE (fntype)); | |
1781 | DECL_ARTIFICIAL (resdecl) = 1; | |
1782 | DECL_IGNORED_P (resdecl) = 1; | |
1783 | DECL_CONTEXT (resdecl) = function; | |
1784 | DECL_RESULT (function) = resdecl; | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | /* Don't build the thunk if the compilation step failed. */ | |
1789 | if (global.errors) | |
1790 | return error_mark_node; | |
1791 | ||
1792 | /* See if we already have the thunk in question. */ | |
1793 | for (tree t = DECL_LANG_THUNKS (function); t; t = DECL_CHAIN (t)) | |
1794 | { | |
1795 | if (THUNK_LANG_OFFSET (t) == offset) | |
1796 | return t; | |
1797 | } | |
1798 | ||
1799 | tree thunk = build_decl (DECL_SOURCE_LOCATION (function), | |
1800 | FUNCTION_DECL, NULL_TREE, TREE_TYPE (function)); | |
1801 | DECL_LANG_SPECIFIC (thunk) = DECL_LANG_SPECIFIC (function); | |
1802 | lang_hooks.dup_lang_specific_decl (thunk); | |
1803 | THUNK_LANG_OFFSET (thunk) = offset; | |
1804 | ||
1805 | TREE_READONLY (thunk) = TREE_READONLY (function); | |
1806 | TREE_THIS_VOLATILE (thunk) = TREE_THIS_VOLATILE (function); | |
1807 | TREE_NOTHROW (thunk) = TREE_NOTHROW (function); | |
1808 | ||
1809 | DECL_CONTEXT (thunk) = d_decl_context (decl); | |
1810 | ||
447d196e IB |
1811 | /* Thunks inherit the public access of the function they are targetting. |
1812 | When the function is outside the current compilation unit however, then the | |
1813 | thunk must be kept private to not conflict. */ | |
1814 | TREE_PUBLIC (thunk) = TREE_PUBLIC (function) && !DECL_EXTERNAL (function); | |
1815 | ||
b4c522fa IB |
1816 | DECL_EXTERNAL (thunk) = 0; |
1817 | ||
1818 | /* Thunks are always addressable. */ | |
1819 | TREE_ADDRESSABLE (thunk) = 1; | |
1820 | TREE_USED (thunk) = 1; | |
1821 | DECL_ARTIFICIAL (thunk) = 1; | |
1822 | DECL_DECLARED_INLINE_P (thunk) = 0; | |
1823 | ||
1824 | DECL_VISIBILITY (thunk) = DECL_VISIBILITY (function); | |
1825 | DECL_COMDAT (thunk) = DECL_COMDAT (function); | |
1826 | DECL_WEAK (thunk) = DECL_WEAK (function); | |
1827 | ||
1828 | tree target_name = DECL_ASSEMBLER_NAME (function); | |
1829 | unsigned identlen = IDENTIFIER_LENGTH (target_name) + 14; | |
1830 | const char *ident = XNEWVEC (const char, identlen); | |
1831 | snprintf (CONST_CAST (char *, ident), identlen, | |
1832 | "_DT%u%s", offset, IDENTIFIER_POINTER (target_name)); | |
1833 | ||
1834 | DECL_NAME (thunk) = get_identifier (ident); | |
1835 | SET_DECL_ASSEMBLER_NAME (thunk, DECL_NAME (thunk)); | |
1836 | ||
1837 | d_keep (thunk); | |
1838 | ||
1839 | finish_thunk (thunk, function); | |
1840 | ||
1841 | /* Add it to the list of thunks associated with the function. */ | |
1842 | DECL_LANG_THUNKS (thunk) = NULL_TREE; | |
1843 | DECL_CHAIN (thunk) = DECL_LANG_THUNKS (function); | |
1844 | DECL_LANG_THUNKS (function) = thunk; | |
1845 | ||
1846 | return thunk; | |
1847 | } | |
1848 | ||
1849 | /* Create the FUNCTION_DECL for a function definition. | |
1850 | This function creates a binding context for the function body | |
1851 | as well as setting up the FUNCTION_DECL in current_function_decl. | |
1852 | Returns the previous function context if it was already set. */ | |
1853 | ||
1854 | tree | |
1855 | start_function (FuncDeclaration *fd) | |
1856 | { | |
1857 | tree fndecl = get_symbol_decl (fd); | |
1858 | ||
1859 | /* Function has been defined, check now whether we intend to send it to | |
1860 | object file, or it really is extern. Such as inlinable functions from | |
1861 | modules not in this compilation, or thunk aliases. */ | |
1862 | TemplateInstance *ti = fd->isInstantiated (); | |
1863 | if (ti && ti->needsCodegen ()) | |
1864 | { | |
1865 | /* Warn about templates instantiated in this compilation. */ | |
1866 | if (ti == fd->parent) | |
1867 | { | |
1868 | warning (OPT_Wtemplates, "%s %qs instantiated", | |
1869 | ti->kind (), ti->toPrettyChars (false)); | |
1870 | } | |
1871 | ||
1872 | DECL_EXTERNAL (fndecl) = 0; | |
1873 | } | |
1874 | else | |
1875 | { | |
1876 | Module *md = fd->getModule (); | |
1877 | if (md && md->isRoot ()) | |
1878 | DECL_EXTERNAL (fndecl) = 0; | |
1879 | } | |
1880 | ||
1881 | DECL_INITIAL (fndecl) = error_mark_node; | |
1882 | ||
1883 | /* Add this decl to the current binding level. */ | |
1884 | d_pushdecl (fndecl); | |
1885 | ||
1886 | /* Save the current function context. */ | |
1887 | tree old_context = current_function_decl; | |
1888 | ||
1889 | if (old_context) | |
1890 | push_function_context (); | |
1891 | ||
1892 | /* Let GCC know the current scope is this function. */ | |
1893 | current_function_decl = fndecl; | |
1894 | ||
1895 | tree restype = TREE_TYPE (TREE_TYPE (fndecl)); | |
1896 | tree resdecl = build_decl (make_location_t (fd->loc), RESULT_DECL, | |
1897 | NULL_TREE, restype); | |
1898 | ||
1899 | DECL_RESULT (fndecl) = resdecl; | |
1900 | DECL_CONTEXT (resdecl) = fndecl; | |
1901 | DECL_ARTIFICIAL (resdecl) = 1; | |
1902 | DECL_IGNORED_P (resdecl) = 1; | |
1903 | ||
1904 | /* Initialize the RTL code for the function. */ | |
1905 | allocate_struct_function (fndecl, false); | |
1906 | ||
1907 | /* Store the end of the function. */ | |
1908 | if (fd->endloc.filename) | |
1909 | cfun->function_end_locus = make_location_t (fd->endloc); | |
1910 | else | |
1911 | cfun->function_end_locus = DECL_SOURCE_LOCATION (fndecl); | |
1912 | ||
1913 | cfun->language = ggc_cleared_alloc<language_function> (); | |
1914 | cfun->language->function = fd; | |
1915 | ||
1916 | /* Default chain value is 'null' unless parent found. */ | |
1917 | cfun->language->static_chain = null_pointer_node; | |
1918 | ||
1919 | /* Find module for this function. */ | |
1920 | for (Dsymbol *p = fd->parent; p != NULL; p = p->parent) | |
1921 | { | |
1922 | cfun->language->module = p->isModule (); | |
1923 | if (cfun->language->module) | |
1924 | break; | |
1925 | } | |
1926 | gcc_assert (cfun->language->module != NULL); | |
1927 | ||
1928 | /* Begin the statement tree for this function. */ | |
1929 | push_stmt_list (); | |
1930 | push_binding_level (level_function); | |
1931 | ||
1932 | return old_context; | |
1933 | } | |
1934 | ||
1935 | /* Finish up a function declaration and compile that function all | |
1936 | the way to assembler language output. The free the storage for | |
1937 | the function definition. Restores the previous function context. */ | |
1938 | ||
1939 | void | |
1940 | finish_function (tree old_context) | |
1941 | { | |
1942 | tree fndecl = current_function_decl; | |
1943 | ||
1944 | /* Tie off the statement tree for this function. */ | |
1945 | tree block = pop_binding_level (); | |
1946 | tree body = pop_stmt_list (); | |
1947 | tree bind = build3 (BIND_EXPR, void_type_node, | |
1948 | BLOCK_VARS (block), body, block); | |
1949 | ||
1950 | gcc_assert (vec_safe_is_empty (d_function_chain->stmt_list)); | |
1951 | ||
1952 | /* Back-end expects a statement list to come from somewhere, however | |
1953 | pop_stmt_list returns expressions when there is a single statement. | |
1954 | So here we create a statement list unconditionally. */ | |
1955 | if (TREE_CODE (body) != STATEMENT_LIST) | |
1956 | { | |
1957 | tree stmtlist = alloc_stmt_list (); | |
1958 | append_to_statement_list_force (body, &stmtlist); | |
1959 | BIND_EXPR_BODY (bind) = stmtlist; | |
1960 | } | |
1961 | else if (!STATEMENT_LIST_HEAD (body)) | |
1962 | { | |
1963 | /* For empty functions add a void return. */ | |
1964 | append_to_statement_list_force (return_expr (NULL_TREE), &body); | |
1965 | } | |
1966 | ||
1967 | DECL_SAVED_TREE (fndecl) = bind; | |
1968 | ||
1969 | if (!errorcount && !global.errors) | |
1970 | { | |
1971 | /* Dump the D-specific tree IR. */ | |
1972 | dump_function (TDI_original, fndecl); | |
1973 | ||
1974 | cgraph_node::finalize_function (fndecl, true); | |
1975 | } | |
1976 | ||
1977 | /* We're leaving the context of this function, so free it. */ | |
1978 | ggc_free (cfun->language); | |
1979 | cfun->language = NULL; | |
1980 | set_cfun (NULL); | |
1981 | ||
1982 | if (old_context) | |
1983 | pop_function_context (); | |
1984 | ||
1985 | current_function_decl = old_context; | |
1986 | } | |
1987 | ||
1988 | /* Mark DECL, which is a VAR_DECL or FUNCTION_DECL as a symbol that | |
1989 | must be emitted in this, output module. */ | |
1990 | ||
1991 | void | |
1992 | mark_needed (tree decl) | |
1993 | { | |
1994 | TREE_USED (decl) = 1; | |
1995 | ||
1996 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
1997 | { | |
1998 | struct cgraph_node *node = cgraph_node::get_create (decl); | |
1999 | node->forced_by_abi = true; | |
2000 | } | |
2001 | else if (VAR_P (decl)) | |
2002 | { | |
2003 | struct varpool_node *node = varpool_node::get_create (decl); | |
2004 | node->forced_by_abi = true; | |
2005 | } | |
2006 | } | |
2007 | ||
2008 | /* Get the offset to the BC's vtbl[] initializer from the start of CD. | |
2009 | Returns "~0u" if the base class is not found in any vtable interfaces. */ | |
2010 | ||
2011 | unsigned | |
2012 | base_vtable_offset (ClassDeclaration *cd, BaseClass *bc) | |
2013 | { | |
5905cbdb | 2014 | unsigned csymoffset = target.classinfosize; |
b4c522fa | 2015 | unsigned interfacesize = int_size_in_bytes (vtbl_interface_type_node); |
2cbc99d1 | 2016 | csymoffset += cd->vtblInterfaces->length * interfacesize; |
b4c522fa | 2017 | |
2cbc99d1 | 2018 | for (size_t i = 0; i < cd->vtblInterfaces->length; i++) |
b4c522fa IB |
2019 | { |
2020 | BaseClass *b = (*cd->vtblInterfaces)[i]; | |
2021 | if (b == bc) | |
2022 | return csymoffset; | |
5905cbdb | 2023 | csymoffset += b->sym->vtbl.length * target.ptrsize; |
b4c522fa IB |
2024 | } |
2025 | ||
2026 | /* Check all overriding interface vtbl[]s. */ | |
2027 | for (ClassDeclaration *cd2 = cd->baseClass; cd2; cd2 = cd2->baseClass) | |
2028 | { | |
2cbc99d1 | 2029 | for (size_t k = 0; k < cd2->vtblInterfaces->length; k++) |
b4c522fa IB |
2030 | { |
2031 | BaseClass *bs = (*cd2->vtblInterfaces)[k]; | |
2032 | if (bs->fillVtbl (cd, NULL, 0)) | |
2033 | { | |
2034 | if (bc == bs) | |
2035 | return csymoffset; | |
5905cbdb | 2036 | csymoffset += bs->sym->vtbl.length * target.ptrsize; |
b4c522fa IB |
2037 | } |
2038 | } | |
2039 | } | |
2040 | ||
2041 | return ~0u; | |
2042 | } | |
2043 | ||
2044 | /* Get the VAR_DECL of the vtable symbol for DECL. If this does not yet exist, | |
2045 | create it. The vtable is accessible via ClassInfo, but since it is needed | |
2046 | frequently (like for rtti comparisons), make it directly accessible. */ | |
2047 | ||
2048 | tree | |
2049 | get_vtable_decl (ClassDeclaration *decl) | |
2050 | { | |
2051 | if (decl->vtblsym) | |
2052 | return decl->vtblsym; | |
2053 | ||
2054 | tree ident = mangle_internal_decl (decl, "__vtbl", "Z"); | |
2055 | /* Note: Using a static array type for the VAR_DECL, the DECL_INITIAL value | |
2056 | will have a different type. However the back-end seems to accept this. */ | |
2cbc99d1 | 2057 | tree type = build_ctype (Type::tvoidptr->sarrayOf (decl->vtbl.length)); |
b4c522fa IB |
2058 | |
2059 | decl->vtblsym = declare_extern_var (ident, type); | |
2060 | DECL_LANG_SPECIFIC (decl->vtblsym) = build_lang_decl (NULL); | |
2061 | ||
2062 | /* Class is a reference, want the record type. */ | |
2063 | DECL_CONTEXT (decl->vtblsym) = TREE_TYPE (build_ctype (decl->type)); | |
2064 | TREE_READONLY (decl->vtblsym) = 1; | |
2065 | DECL_VIRTUAL_P (decl->vtblsym) = 1; | |
2066 | ||
2067 | SET_DECL_ALIGN (decl->vtblsym, TARGET_VTABLE_ENTRY_ALIGN); | |
2068 | DECL_USER_ALIGN (decl->vtblsym) = true; | |
2069 | ||
2070 | return decl->vtblsym; | |
2071 | } | |
2072 | ||
2073 | /* Helper function of build_class_instance. Find the field inside aggregate | |
2074 | TYPE identified by IDENT at field OFFSET. */ | |
2075 | ||
2076 | static tree | |
2077 | find_aggregate_field (tree type, tree ident, tree offset) | |
2078 | { | |
2079 | tree fields = TYPE_FIELDS (type); | |
2080 | ||
2081 | for (tree field = fields; field != NULL_TREE; field = TREE_CHAIN (field)) | |
2082 | { | |
2083 | if (DECL_NAME (field) == NULL_TREE | |
2084 | && RECORD_OR_UNION_TYPE_P (TREE_TYPE (field)) | |
2085 | && ANON_AGGR_TYPE_P (TREE_TYPE (field))) | |
2086 | { | |
2087 | /* Search nesting anonymous structs and unions. */ | |
2088 | tree vfield = find_aggregate_field (TREE_TYPE (field), | |
2089 | ident, offset); | |
2090 | if (vfield != NULL_TREE) | |
2091 | return vfield; | |
2092 | } | |
2093 | else if (DECL_NAME (field) == ident | |
2094 | && (offset == NULL_TREE | |
2095 | || DECL_FIELD_OFFSET (field) == offset)) | |
2096 | { | |
2097 | /* Found matching field at offset. */ | |
2098 | return field; | |
2099 | } | |
2100 | } | |
2101 | ||
2102 | return NULL_TREE; | |
2103 | } | |
2104 | ||
2105 | /* Helper function of build_new_class_expr. Return a constructor that matches | |
2106 | the layout of the class expression EXP. */ | |
2107 | ||
2108 | static tree | |
2109 | build_class_instance (ClassReferenceExp *exp) | |
2110 | { | |
2111 | ClassDeclaration *cd = exp->originalClass (); | |
2112 | tree type = TREE_TYPE (build_ctype (exp->value->stype)); | |
2113 | vec<constructor_elt, va_gc> *ve = NULL; | |
2114 | ||
2115 | /* The set base vtable field. */ | |
2116 | tree vptr = build_address (get_vtable_decl (cd)); | |
2117 | CONSTRUCTOR_APPEND_ELT (ve, TYPE_FIELDS (type), vptr); | |
2118 | ||
2119 | /* Go through the inheritance graph from top to bottom. This will add all | |
2120 | values to the constructor out of order, however build_struct_literal | |
2121 | will re-order all values before returning the finished literal. */ | |
2122 | for (ClassDeclaration *bcd = cd; bcd != NULL; bcd = bcd->baseClass) | |
2123 | { | |
2124 | /* Anonymous vtable interface fields are laid out before the fields of | |
2125 | each class. The interface offset is used to determine where to put | |
2126 | the classinfo offset reference. */ | |
2cbc99d1 | 2127 | for (size_t i = 0; i < bcd->vtblInterfaces->length; i++) |
b4c522fa IB |
2128 | { |
2129 | BaseClass *bc = (*bcd->vtblInterfaces)[i]; | |
2130 | ||
2131 | for (ClassDeclaration *cd2 = cd; 1; cd2 = cd2->baseClass) | |
2132 | { | |
2133 | gcc_assert (cd2 != NULL); | |
2134 | ||
2135 | unsigned csymoffset = base_vtable_offset (cd2, bc); | |
2136 | /* If the base class vtable was found. */ | |
2137 | if (csymoffset != ~0u) | |
2138 | { | |
2139 | tree csym = build_address (get_classinfo_decl (cd2)); | |
2140 | csym = build_offset (csym, size_int (csymoffset)); | |
2141 | ||
2142 | tree field = find_aggregate_field (type, NULL_TREE, | |
2143 | size_int (bc->offset)); | |
2144 | gcc_assert (field != NULL_TREE); | |
2145 | ||
2146 | CONSTRUCTOR_APPEND_ELT (ve, field, csym); | |
2147 | break; | |
2148 | } | |
2149 | } | |
2150 | } | |
2151 | ||
2152 | /* Generate initial values of all fields owned by current class. | |
2153 | Use both the name and offset to find the right field. */ | |
2cbc99d1 | 2154 | for (size_t i = 0; i < bcd->fields.length; i++) |
b4c522fa IB |
2155 | { |
2156 | VarDeclaration *vfield = bcd->fields[i]; | |
2157 | int index = exp->findFieldIndexByName (vfield); | |
2158 | gcc_assert (index != -1); | |
2159 | ||
2160 | Expression *value = (*exp->value->elements)[index]; | |
2161 | if (!value) | |
2162 | continue; | |
2163 | ||
2164 | /* Use find_aggregate_field to get the overridden field decl, | |
2165 | instead of the field associated with the base class. */ | |
2166 | tree field = get_symbol_decl (bcd->fields[i]); | |
2167 | field = find_aggregate_field (type, DECL_NAME (field), | |
2168 | DECL_FIELD_OFFSET (field)); | |
2169 | gcc_assert (field != NULL_TREE); | |
2170 | ||
2171 | CONSTRUCTOR_APPEND_ELT (ve, field, build_expr (value, true)); | |
2172 | } | |
2173 | } | |
2174 | ||
2175 | return build_struct_literal (type, ve); | |
2176 | } | |
2177 | ||
2178 | /* Get the VAR_DECL of a class instance representing EXPR as static data. | |
2179 | If this does not yet exist, create it. This is used to support initializing | |
2180 | a static variable that is of a class type using values known during CTFE. | |
2181 | In user code, it is analogous to the following code snippet. | |
2182 | ||
2183 | enum E = new C(1, 2, 3); | |
2184 | ||
2185 | That we write the contents of `C(1, 2, 3)' to static data is only a compiler | |
2186 | implementation detail. The initialization of these symbols could be done at | |
2187 | run-time using during as part of the module initialization or shared static | |
2188 | constructors phase of run-time start-up - whichever comes after `gc_init()'. | |
2189 | And infact that would be the better thing to do here eventually. */ | |
2190 | ||
2191 | tree | |
2192 | build_new_class_expr (ClassReferenceExp *expr) | |
2193 | { | |
2194 | if (expr->value->sym) | |
2195 | return expr->value->sym; | |
2196 | ||
2197 | /* Build the reference symbol. */ | |
2198 | tree type = build_ctype (expr->value->stype); | |
2199 | expr->value->sym = build_artificial_decl (TREE_TYPE (type), NULL_TREE, "C"); | |
2200 | ||
2201 | DECL_INITIAL (expr->value->sym) = build_class_instance (expr); | |
2202 | d_pushdecl (expr->value->sym); | |
2203 | rest_of_decl_compilation (expr->value->sym, 1, 0); | |
2204 | ||
2205 | return expr->value->sym; | |
2206 | } | |
2207 | ||
2208 | /* Get the VAR_DECL of the static initializer symbol for the struct/class DECL. | |
2209 | If this does not yet exist, create it. The static initializer data is | |
2210 | accessible via TypeInfo, and is also used in 'new class' and default | |
2211 | initializing struct literals. */ | |
2212 | ||
2213 | tree | |
2214 | aggregate_initializer_decl (AggregateDeclaration *decl) | |
2215 | { | |
2216 | if (decl->sinit) | |
2217 | return decl->sinit; | |
2218 | ||
2219 | /* Class is a reference, want the record type. */ | |
2220 | tree type = build_ctype (decl->type); | |
2221 | StructDeclaration *sd = decl->isStructDeclaration (); | |
2222 | if (!sd) | |
2223 | type = TREE_TYPE (type); | |
2224 | ||
2225 | tree ident = mangle_internal_decl (decl, "__init", "Z"); | |
2226 | ||
2227 | decl->sinit = declare_extern_var (ident, type); | |
2228 | DECL_LANG_SPECIFIC (decl->sinit) = build_lang_decl (NULL); | |
2229 | ||
2230 | DECL_CONTEXT (decl->sinit) = type; | |
2231 | TREE_READONLY (decl->sinit) = 1; | |
2232 | ||
2233 | /* Honor struct alignment set by user. */ | |
2234 | if (sd && sd->alignment != STRUCTALIGN_DEFAULT) | |
2235 | { | |
2236 | SET_DECL_ALIGN (decl->sinit, sd->alignment * BITS_PER_UNIT); | |
2237 | DECL_USER_ALIGN (decl->sinit) = true; | |
2238 | } | |
2239 | ||
2240 | return decl->sinit; | |
2241 | } | |
2242 | ||
2243 | /* Generate the data for the static initializer. */ | |
2244 | ||
2245 | tree | |
2246 | layout_class_initializer (ClassDeclaration *cd) | |
2247 | { | |
2248 | NewExp *ne = NewExp::create (cd->loc, NULL, NULL, cd->type, NULL); | |
2249 | ne->type = cd->type; | |
2250 | ||
2251 | Expression *e = ne->ctfeInterpret (); | |
2252 | gcc_assert (e->op == TOKclassreference); | |
2253 | ||
2254 | return build_class_instance ((ClassReferenceExp *) e); | |
2255 | } | |
2256 | ||
2257 | tree | |
2258 | layout_struct_initializer (StructDeclaration *sd) | |
2259 | { | |
2260 | StructLiteralExp *sle = StructLiteralExp::create (sd->loc, sd, NULL); | |
2261 | ||
2262 | if (!sd->fill (sd->loc, sle->elements, true)) | |
2263 | gcc_unreachable (); | |
2264 | ||
2265 | sle->type = sd->type; | |
2266 | return build_expr (sle, true); | |
2267 | } | |
2268 | ||
2269 | /* Get the VAR_DECL of the static initializer symbol for the enum DECL. | |
2270 | If this does not yet exist, create it. The static initializer data is | |
2271 | accessible via TypeInfo_Enum, but the field member type is a byte[] that | |
2272 | requires a pointer to a symbol reference. */ | |
2273 | ||
2274 | tree | |
2275 | enum_initializer_decl (EnumDeclaration *decl) | |
2276 | { | |
2277 | if (decl->sinit) | |
2278 | return decl->sinit; | |
2279 | ||
2280 | tree type = build_ctype (decl->type); | |
2281 | ||
2282 | Identifier *ident_save = decl->ident; | |
2283 | if (!decl->ident) | |
2284 | decl->ident = Identifier::generateId ("__enum"); | |
2285 | tree ident = mangle_internal_decl (decl, "__init", "Z"); | |
2286 | decl->ident = ident_save; | |
2287 | ||
2288 | decl->sinit = declare_extern_var (ident, type); | |
2289 | DECL_LANG_SPECIFIC (decl->sinit) = build_lang_decl (NULL); | |
2290 | ||
2291 | DECL_CONTEXT (decl->sinit) = d_decl_context (decl); | |
2292 | TREE_READONLY (decl->sinit) = 1; | |
2293 | ||
2294 | return decl->sinit; | |
2295 | } | |
2296 | ||
2297 | /* Return an anonymous static variable of type TYPE, initialized with INIT, | |
2298 | and optionally prefixing the name with PREFIX. */ | |
2299 | ||
2300 | tree | |
2301 | build_artificial_decl (tree type, tree init, const char *prefix) | |
2302 | { | |
2303 | tree decl = build_decl (UNKNOWN_LOCATION, VAR_DECL, NULL_TREE, type); | |
2304 | const char *name = prefix ? prefix : "___s"; | |
2305 | char *label; | |
2306 | ||
2307 | ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl)); | |
2308 | SET_DECL_ASSEMBLER_NAME (decl, get_identifier (label)); | |
2309 | DECL_NAME (decl) = DECL_ASSEMBLER_NAME (decl); | |
2310 | ||
2311 | TREE_PUBLIC (decl) = 0; | |
2312 | TREE_STATIC (decl) = 1; | |
2313 | TREE_USED (decl) = 1; | |
2314 | DECL_IGNORED_P (decl) = 1; | |
2315 | DECL_ARTIFICIAL (decl) = 1; | |
2316 | ||
2317 | /* Perhaps at some point the initializer constant should be hashed | |
2318 | to remove duplicates. */ | |
2319 | DECL_INITIAL (decl) = init; | |
2320 | ||
2321 | return decl; | |
2322 | } | |
2323 | ||
2324 | /* Build TYPE_DECL for the declaration DSYM. */ | |
2325 | ||
2326 | void | |
2327 | build_type_decl (tree type, Dsymbol *dsym) | |
2328 | { | |
2329 | if (TYPE_STUB_DECL (type)) | |
2330 | return; | |
2331 | ||
2332 | gcc_assert (!POINTER_TYPE_P (type)); | |
2333 | ||
9dddefef IB |
2334 | /* If a templated type, use the template instance name, as that includes all |
2335 | template parameters. */ | |
2336 | const char *name = dsym->parent->isTemplateInstance () | |
2337 | ? ((TemplateInstance *) dsym->parent)->toChars () : dsym->ident->toChars (); | |
2338 | ||
b4c522fa | 2339 | tree decl = build_decl (make_location_t (dsym->loc), TYPE_DECL, |
9dddefef | 2340 | get_identifier (name), type); |
b5446d0c | 2341 | SET_DECL_ASSEMBLER_NAME (decl, get_identifier (d_mangle_decl (dsym))); |
b4c522fa IB |
2342 | TREE_PUBLIC (decl) = 1; |
2343 | DECL_ARTIFICIAL (decl) = 1; | |
2344 | DECL_CONTEXT (decl) = d_decl_context (dsym); | |
2345 | ||
2346 | TYPE_CONTEXT (type) = DECL_CONTEXT (decl); | |
2347 | TYPE_NAME (type) = decl; | |
2348 | ||
2349 | /* Not sure if there is a need for separate TYPE_DECLs in | |
2350 | TYPE_NAME and TYPE_STUB_DECL. */ | |
2351 | if (TREE_CODE (type) == ENUMERAL_TYPE || RECORD_OR_UNION_TYPE_P (type)) | |
2352 | TYPE_STUB_DECL (type) = decl; | |
2353 | ||
2354 | rest_of_decl_compilation (decl, SCOPE_FILE_SCOPE_P (decl), 0); | |
2355 | } | |
2356 | ||
2357 | /* Create a declaration for field NAME of a given TYPE, setting the flags | |
2358 | for whether the field is ARTIFICIAL and/or IGNORED. */ | |
2359 | ||
2360 | tree | |
2361 | create_field_decl (tree type, const char *name, int artificial, int ignored) | |
2362 | { | |
2363 | tree decl = build_decl (input_location, FIELD_DECL, | |
2364 | name ? get_identifier (name) : NULL_TREE, type); | |
2365 | DECL_ARTIFICIAL (decl) = artificial; | |
2366 | DECL_IGNORED_P (decl) = ignored; | |
2367 | ||
2368 | return decl; | |
2369 | } | |
2370 | ||
2371 | /* Return the COMDAT group into which DECL should be placed. */ | |
2372 | ||
2373 | static tree | |
2374 | d_comdat_group (tree decl) | |
2375 | { | |
2376 | /* If already part of a comdat group, use that. */ | |
2377 | if (DECL_COMDAT_GROUP (decl)) | |
2378 | return DECL_COMDAT_GROUP (decl); | |
2379 | ||
2380 | return DECL_ASSEMBLER_NAME (decl); | |
2381 | } | |
2382 | ||
2383 | /* Set DECL up to have the closest approximation of "initialized common" | |
2384 | linkage available. */ | |
2385 | ||
2386 | void | |
2387 | d_comdat_linkage (tree decl) | |
2388 | { | |
2389 | if (flag_weak) | |
2390 | make_decl_one_only (decl, d_comdat_group (decl)); | |
2391 | else if (TREE_CODE (decl) == FUNCTION_DECL | |
2392 | || (VAR_P (decl) && DECL_ARTIFICIAL (decl))) | |
2393 | /* We can just emit function and compiler-generated variables statically; | |
2394 | having multiple copies is (for the most part) only a waste of space. */ | |
2395 | TREE_PUBLIC (decl) = 0; | |
2396 | else if (DECL_INITIAL (decl) == NULL_TREE | |
2397 | || DECL_INITIAL (decl) == error_mark_node) | |
2398 | /* Fallback, cannot have multiple copies. */ | |
2399 | DECL_COMMON (decl) = 1; | |
2400 | ||
2401 | if (TREE_PUBLIC (decl)) | |
2402 | DECL_COMDAT (decl) = 1; | |
2403 | } | |
2404 | ||
2405 | /* Set DECL up to have the closest approximation of "linkonce" linkage. */ | |
2406 | ||
2407 | void | |
2408 | d_linkonce_linkage (tree decl) | |
2409 | { | |
2410 | /* Weak definitions have to be public. */ | |
2411 | if (!TREE_PUBLIC (decl)) | |
2412 | return; | |
2413 | ||
2414 | /* Necessary to allow DECL_ONE_ONLY or DECL_WEAK functions to be inlined. */ | |
2415 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
2416 | DECL_DECLARED_INLINE_P (decl) = 1; | |
2417 | ||
2418 | /* No weak support, fallback to COMDAT linkage. */ | |
2419 | if (!flag_weak) | |
2420 | return d_comdat_linkage (decl); | |
2421 | ||
2422 | make_decl_one_only (decl, d_comdat_group (decl)); | |
2423 | } |