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b4c522fa | 1 | /* decl.cc -- Lower D frontend declarations to GCC trees. |
83ffe9cd | 2 | Copyright (C) 2006-2023 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" | |
89576d86 | 56 | #include "tree-nested.h" |
67f3791f JH |
57 | #include "alloc-pool.h" |
58 | #include "symbol-summary.h" | |
59 | #include "symtab-thunks.h" | |
ad4c44d2 | 60 | #include "gimple-expr.h" |
b4c522fa IB |
61 | |
62 | #include "d-tree.h" | |
bda51959 | 63 | #include "d-target.h" |
b4c522fa IB |
64 | |
65 | ||
66 | /* Return identifier for the external mangled name of DECL. */ | |
67 | ||
b5446d0c IB |
68 | const char * |
69 | d_mangle_decl (Dsymbol *decl) | |
b4c522fa IB |
70 | { |
71 | if (decl->isFuncDeclaration ()) | |
af3c19f0 | 72 | return mangleExact ((FuncDeclaration *) decl); |
b4c522fa IB |
73 | else |
74 | { | |
75 | OutBuffer buf; | |
76 | mangleToBuffer (decl, &buf); | |
fced594b | 77 | return buf.extractChars (); |
b4c522fa IB |
78 | } |
79 | } | |
80 | ||
81 | /* Generate a mangled identifier using NAME and SUFFIX, prefixed by the | |
82 | assembler name for DECL. */ | |
83 | ||
84 | tree | |
85 | mangle_internal_decl (Dsymbol *decl, const char *name, const char *suffix) | |
86 | { | |
b5446d0c | 87 | const char *prefix = d_mangle_decl (decl); |
b4c522fa IB |
88 | unsigned namelen = strlen (name); |
89 | unsigned buflen = (2 + strlen (prefix) + namelen + strlen (suffix)) * 2; | |
90 | char *buf = (char *) alloca (buflen); | |
91 | ||
92 | snprintf (buf, buflen, "_D%s%u%s%s", prefix, namelen, name, suffix); | |
93 | tree ident = get_identifier (buf); | |
94 | ||
95 | /* Symbol is not found in user code, but generate a readable name for it | |
96 | anyway for debug and diagnostic reporting. */ | |
97 | snprintf (buf, buflen, "%s.%s", decl->toPrettyChars (), name); | |
98 | IDENTIFIER_PRETTY_NAME (ident) = get_identifier (buf); | |
99 | ||
100 | return ident; | |
101 | } | |
102 | ||
f4c3ce32 | 103 | /* Returns true if DECL is from the gcc.attributes module. */ |
b4c522fa IB |
104 | |
105 | static bool | |
106 | gcc_attribute_p (Dsymbol *decl) | |
107 | { | |
108 | ModuleDeclaration *md = decl->getModule ()->md; | |
109 | ||
5fee5ec3 | 110 | if (md && md->packages.length == 1) |
b4c522fa | 111 | { |
5fee5ec3 | 112 | if (!strcmp (md->packages.ptr[0]->toChars (), "gcc") |
8e84a142 | 113 | && !strcmp (md->id->toChars (), "attributes")) |
b4c522fa IB |
114 | return true; |
115 | } | |
116 | ||
117 | return false; | |
118 | } | |
119 | ||
499b0770 IB |
120 | /* Return the DECL_RESULT for the function declaration DECL, create it if it |
121 | doesn't already exist. */ | |
122 | ||
123 | static tree | |
124 | get_fndecl_result (FuncDeclaration *decl) | |
125 | { | |
126 | tree fndecl = get_symbol_decl (decl); | |
127 | tree resdecl = DECL_RESULT (fndecl); | |
128 | ||
129 | if (resdecl != NULL_TREE) | |
130 | return resdecl; | |
131 | ||
132 | resdecl = build_decl (make_location_t (decl->loc), RESULT_DECL, | |
133 | NULL_TREE, TREE_TYPE (TREE_TYPE (fndecl))); | |
134 | ||
135 | DECL_ARTIFICIAL (resdecl) = 1; | |
136 | DECL_IGNORED_P (resdecl) = 1; | |
137 | DECL_CONTEXT (resdecl) = fndecl; | |
138 | DECL_RESULT (fndecl) = resdecl; | |
139 | return resdecl; | |
140 | } | |
141 | ||
142 | /* Return the list of PARAM_DECLs for the function declaration DECL, create it | |
143 | if it doesn't already exist. */ | |
144 | ||
145 | static tree | |
146 | get_fndecl_arguments (FuncDeclaration *decl) | |
147 | { | |
148 | tree fndecl = get_symbol_decl (decl); | |
149 | tree param_list = DECL_ARGUMENTS (fndecl); | |
150 | ||
151 | if (param_list != NULL_TREE) | |
152 | return param_list; | |
153 | ||
154 | if (decl->fbody) | |
155 | { | |
156 | /* Handle special arguments first. */ | |
157 | ||
158 | /* `this' parameter: | |
159 | For nested functions, D still generates a vthis, but it | |
160 | should not be referenced in any expression. */ | |
161 | if (decl->vthis) | |
162 | { | |
163 | tree parm_decl = get_symbol_decl (decl->vthis); | |
164 | DECL_ARTIFICIAL (parm_decl) = 1; | |
165 | TREE_READONLY (parm_decl) = 1; | |
166 | ||
167 | if (decl->vthis->type == Type::tvoidptr) | |
168 | { | |
169 | /* Replace generic pointer with back-end closure type | |
170 | (this wins for gdb). */ | |
171 | tree frame_type = FRAMEINFO_TYPE (get_frameinfo (decl)); | |
172 | gcc_assert (frame_type != NULL_TREE); | |
173 | TREE_TYPE (parm_decl) = build_pointer_type (frame_type); | |
174 | } | |
175 | ||
176 | param_list = chainon (param_list, parm_decl); | |
177 | } | |
178 | ||
179 | /* `_arguments' parameter. */ | |
180 | if (decl->v_arguments) | |
181 | { | |
182 | tree parm_decl = get_symbol_decl (decl->v_arguments); | |
183 | param_list = chainon (param_list, parm_decl); | |
184 | } | |
185 | ||
186 | /* Now add on formal function parameters. */ | |
187 | size_t n_parameters = decl->parameters ? decl->parameters->length : 0; | |
188 | ||
189 | for (size_t i = 0; i < n_parameters; i++) | |
190 | { | |
191 | VarDeclaration *param = (*decl->parameters)[i]; | |
192 | tree parm_decl = get_symbol_decl (param); | |
193 | ||
194 | /* Type `noreturn` is a terminator, as no other arguments can possibly | |
195 | be evaluated after it. */ | |
196 | if (TREE_TYPE (parm_decl) == noreturn_type_node) | |
197 | break; | |
198 | ||
199 | /* Chain them in the correct order. */ | |
200 | param_list = chainon (param_list, parm_decl); | |
201 | } | |
202 | } | |
203 | else | |
204 | { | |
205 | /* Build parameters from the function type. */ | |
206 | tree fntype = TREE_TYPE (fndecl); | |
207 | ||
208 | for (tree t = TYPE_ARG_TYPES (fntype); t; t = TREE_CHAIN (t)) | |
209 | { | |
210 | if (t == void_list_node) | |
211 | break; | |
212 | ||
213 | tree param = build_decl (DECL_SOURCE_LOCATION (fndecl), | |
214 | PARM_DECL, NULL_TREE, TREE_VALUE (t)); | |
215 | DECL_ARG_TYPE (param) = TREE_TYPE (param); | |
216 | DECL_ARTIFICIAL (param) = 1; | |
217 | DECL_IGNORED_P (param) = 1; | |
218 | DECL_CONTEXT (param) = fndecl; | |
219 | param_list = chainon (param_list, param); | |
220 | } | |
221 | } | |
222 | ||
223 | DECL_ARGUMENTS (fndecl) = param_list; | |
224 | return param_list; | |
225 | } | |
226 | ||
b4c522fa IB |
227 | /* Implements the visitor interface to lower all Declaration AST classes |
228 | emitted from the D Front-end to GCC trees. | |
229 | All visit methods accept one parameter D, which holds the frontend AST | |
230 | of the declaration to compile. These also don't return any value, instead | |
231 | generated code are appened to global_declarations or added to the | |
232 | current_binding_level by d_pushdecl(). */ | |
233 | ||
234 | class DeclVisitor : public Visitor | |
235 | { | |
236 | using Visitor::visit; | |
237 | ||
c50eadba IB |
238 | /* If we're lowering the body of a version(unittest) condition. */ |
239 | bool in_version_unittest_; | |
240 | ||
b4c522fa IB |
241 | public: |
242 | DeclVisitor (void) | |
243 | { | |
c50eadba | 244 | this->in_version_unittest_ = false; |
b4c522fa IB |
245 | } |
246 | ||
7edc15f2 IB |
247 | /* Helper for generating code for the dsymbol AST class D. |
248 | Sets up the location of the symbol before lowering. */ | |
249 | ||
250 | void build_dsymbol (Dsymbol *d) | |
251 | { | |
252 | location_t saved_location = input_location; | |
253 | input_location = make_location_t (d->loc); | |
254 | d->accept (this); | |
255 | input_location = saved_location; | |
256 | } | |
257 | ||
b4c522fa IB |
258 | /* This should be overridden by each declaration class. */ |
259 | ||
442cf097 | 260 | void visit (Dsymbol *) final override |
b4c522fa IB |
261 | { |
262 | } | |
263 | ||
264 | /* Compile a D module, and all members of it. */ | |
265 | ||
442cf097 | 266 | void visit (Module *d) final override |
b4c522fa | 267 | { |
0fb57034 | 268 | if (d->semanticRun >= PASS::obj) |
b4c522fa IB |
269 | return; |
270 | ||
271 | build_module_tree (d); | |
0fb57034 | 272 | d->semanticRun = PASS::obj; |
b4c522fa IB |
273 | } |
274 | ||
275 | /* Write the imported symbol to debug. */ | |
276 | ||
442cf097 | 277 | void visit (Import *d) final override |
b4c522fa | 278 | { |
0fb57034 | 279 | if (d->semanticRun >= PASS::obj) |
e64deb74 IB |
280 | return; |
281 | ||
b4c522fa IB |
282 | /* Implements import declarations by telling the debug back-end we are |
283 | importing the NAMESPACE_DECL of the module or IMPORTED_DECL of the | |
284 | declaration into the current lexical scope CONTEXT. NAME is set if | |
285 | this is a renamed import. */ | |
286 | if (d->isstatic) | |
287 | return; | |
288 | ||
289 | /* Get the context of this import, this should never be null. */ | |
290 | tree context = d_module_context (); | |
291 | ||
292 | if (d->ident == NULL) | |
293 | { | |
294 | /* Importing declaration list. */ | |
2cbc99d1 | 295 | for (size_t i = 0; i < d->names.length; i++) |
b4c522fa IB |
296 | { |
297 | AliasDeclaration *aliasdecl = d->aliasdecls[i]; | |
298 | tree decl = build_import_decl (aliasdecl); | |
299 | ||
300 | /* Skip over unhandled imports. */ | |
301 | if (decl == NULL_TREE) | |
302 | continue; | |
303 | ||
304 | Identifier *alias = d->aliases[i]; | |
305 | tree name = (alias != NULL) | |
306 | ? get_identifier (alias->toChars ()) : NULL_TREE; | |
307 | ||
d9d8c967 IB |
308 | if (TREE_CODE (decl) != TREE_LIST) |
309 | debug_hooks->imported_module_or_decl (decl, name, context, | |
310 | false, false); | |
311 | else | |
312 | { | |
313 | /* Overload sets return a list of imported decls. */ | |
314 | for (; decl != NULL_TREE; decl = TREE_CHAIN (decl)) | |
315 | debug_hooks->imported_module_or_decl (TREE_VALUE (decl), name, | |
316 | context, false, false); | |
317 | } | |
b4c522fa IB |
318 | } |
319 | } | |
320 | else | |
321 | { | |
322 | /* Importing the entire module. */ | |
323 | tree decl = build_import_decl (d->mod); | |
324 | ||
325 | tree name = (d->aliasId != NULL) | |
326 | ? get_identifier (d->aliasId->toChars ()) : NULL_TREE; | |
327 | ||
328 | debug_hooks->imported_module_or_decl (decl, name, context, | |
329 | false, false); | |
330 | } | |
e64deb74 | 331 | |
0fb57034 | 332 | d->semanticRun = PASS::obj; |
b4c522fa IB |
333 | } |
334 | ||
335 | /* Expand any local variables found in tuples. */ | |
336 | ||
442cf097 | 337 | void visit (TupleDeclaration *d) final override |
b4c522fa | 338 | { |
2cbc99d1 | 339 | for (size_t i = 0; i < d->objects->length; i++) |
b4c522fa IB |
340 | { |
341 | RootObject *o = (*d->objects)[i]; | |
d873350a | 342 | if (o->dyncast () == DYNCAST_EXPRESSION) |
b4c522fa | 343 | { |
d97f3bca IB |
344 | VarExp *ve = ((Expression *) o)->isVarExp (); |
345 | if (ve) | |
346 | this->build_dsymbol (ve->var); | |
b4c522fa IB |
347 | } |
348 | } | |
349 | } | |
350 | ||
351 | /* Walk over all declarations in the attribute scope. */ | |
352 | ||
442cf097 | 353 | void visit (AttribDeclaration *d) final override |
b4c522fa | 354 | { |
d3da83f6 | 355 | Dsymbols *ds = d->include (NULL); |
b4c522fa IB |
356 | |
357 | if (!ds) | |
358 | return; | |
359 | ||
2cbc99d1 | 360 | for (size_t i = 0; i < ds->length; i++) |
7edc15f2 | 361 | this->build_dsymbol ((*ds)[i]); |
b4c522fa IB |
362 | } |
363 | ||
364 | /* Pragmas are a way to pass special information to the compiler and to add | |
5fee5ec3 | 365 | vendor specific extensions to D. */ |
b4c522fa | 366 | |
442cf097 | 367 | void visit (PragmaDeclaration *d) final override |
b4c522fa | 368 | { |
5fee5ec3 IB |
369 | if (d->ident == Identifier::idPool ("lib") |
370 | || d->ident == Identifier::idPool ("startaddress")) | |
b4c522fa | 371 | { |
5fee5ec3 | 372 | if (!global.params.ignoreUnsupportedPragmas) |
b4c522fa IB |
373 | { |
374 | warning_at (make_location_t (d->loc), OPT_Wunknown_pragmas, | |
375 | "pragma(%s) not implemented", d->ident->toChars ()); | |
376 | } | |
377 | } | |
378 | ||
379 | visit ((AttribDeclaration *) d); | |
380 | } | |
381 | ||
c50eadba IB |
382 | /* Conditional compilation is the process of selecting which code to compile |
383 | and which code to not compile. Look for version conditions that may */ | |
384 | ||
442cf097 | 385 | void visit (ConditionalDeclaration *d) final override |
c50eadba IB |
386 | { |
387 | bool old_condition = this->in_version_unittest_; | |
388 | ||
389 | if (global.params.useUnitTests) | |
390 | { | |
391 | VersionCondition *vc = d->condition->isVersionCondition (); | |
392 | if (vc && vc->ident == Identifier::idPool ("unittest")) | |
393 | this->in_version_unittest_ = true; | |
394 | } | |
395 | ||
396 | visit ((AttribDeclaration *) d); | |
397 | ||
398 | this->in_version_unittest_ = old_condition; | |
399 | } | |
400 | ||
b4c522fa IB |
401 | /* Walk over all members in the namespace scope. */ |
402 | ||
442cf097 | 403 | void visit (Nspace *d) final override |
b4c522fa IB |
404 | { |
405 | if (isError (d) || !d->members) | |
406 | return; | |
407 | ||
2cbc99d1 | 408 | for (size_t i = 0; i < d->members->length; i++) |
7edc15f2 | 409 | this->build_dsymbol ((*d->members)[i]); |
b4c522fa IB |
410 | } |
411 | ||
9dddefef IB |
412 | /* Templates are D's approach to generic programming. They have no members |
413 | that can be emitted, however if the template is nested and used as a | |
414 | voldemort type, then it's members must be compiled before the parent | |
415 | function finishes. */ | |
416 | ||
442cf097 | 417 | void visit (TemplateDeclaration *d) final override |
9dddefef IB |
418 | { |
419 | /* Type cannot be directly named outside of the scope it's declared in, so | |
420 | the only way it can be escaped is if the function has auto return. */ | |
421 | FuncDeclaration *fd = d_function_chain ? d_function_chain->function : NULL; | |
422 | ||
423 | if (!fd || !fd->isAuto ()) | |
424 | return; | |
425 | ||
426 | /* Check if the function returns an instantiated type that may contain | |
427 | nested members. Only applies to classes or structs. */ | |
428 | Type *tb = fd->type->nextOf ()->baseElemOf (); | |
429 | ||
5fee5ec3 | 430 | while (tb->ty == TY::Tarray || tb->ty == TY::Tpointer) |
9dddefef IB |
431 | tb = tb->nextOf ()->baseElemOf (); |
432 | ||
433 | TemplateInstance *ti = NULL; | |
434 | ||
5fee5ec3 | 435 | if (tb->ty == TY::Tstruct) |
89fdaf5a | 436 | ti = tb->isTypeStruct ()->sym->isInstantiated (); |
5fee5ec3 | 437 | else if (tb->ty == TY::Tclass) |
89fdaf5a | 438 | ti = tb->isTypeClass ()->sym->isInstantiated (); |
9dddefef IB |
439 | |
440 | /* Return type is instantiated from this template declaration, walk over | |
441 | all members of the instance. */ | |
442 | if (ti && ti->tempdecl == d) | |
7edc15f2 | 443 | this->build_dsymbol (ti); |
9dddefef IB |
444 | } |
445 | ||
b4c522fa IB |
446 | /* Walk over all members in the instantiated template. */ |
447 | ||
442cf097 | 448 | void visit (TemplateInstance *d) final override |
b4c522fa IB |
449 | { |
450 | if (isError (d)|| !d->members) | |
451 | return; | |
452 | ||
453 | if (!d->needsCodegen ()) | |
454 | return; | |
455 | ||
2cbc99d1 | 456 | for (size_t i = 0; i < d->members->length; i++) |
7edc15f2 | 457 | this->build_dsymbol ((*d->members)[i]); |
b4c522fa IB |
458 | } |
459 | ||
460 | /* Walk over all members in the mixin template scope. */ | |
461 | ||
442cf097 | 462 | void visit (TemplateMixin *d) final override |
b4c522fa IB |
463 | { |
464 | if (isError (d)|| !d->members) | |
465 | return; | |
466 | ||
2cbc99d1 | 467 | for (size_t i = 0; i < d->members->length; i++) |
7edc15f2 | 468 | this->build_dsymbol ((*d->members)[i]); |
b4c522fa IB |
469 | } |
470 | ||
471 | /* Write out compiler generated TypeInfo, initializer and functions for the | |
472 | given struct declaration, walking over all static members. */ | |
473 | ||
442cf097 | 474 | void visit (StructDeclaration *d) final override |
b4c522fa | 475 | { |
0fb57034 | 476 | if (d->semanticRun >= PASS::obj) |
e64deb74 IB |
477 | return; |
478 | ||
5fee5ec3 | 479 | if (d->type->ty == TY::Terror) |
b4c522fa IB |
480 | { |
481 | error_at (make_location_t (d->loc), | |
482 | "had semantic errors when compiling"); | |
483 | return; | |
484 | } | |
485 | ||
f4c3ce32 IB |
486 | /* Don't emit any symbols from gcc.attributes module. */ |
487 | if (gcc_attribute_p (d)) | |
488 | return; | |
489 | ||
b4c522fa IB |
490 | /* Add this decl to the current binding level. */ |
491 | tree ctype = build_ctype (d->type); | |
492 | if (TYPE_NAME (ctype)) | |
493 | d_pushdecl (TYPE_NAME (ctype)); | |
494 | ||
495 | /* Anonymous structs/unions only exist as part of others, | |
496 | do not output forward referenced structs. */ | |
497 | if (d->isAnonymous () || !d->members) | |
498 | return; | |
499 | ||
b4c522fa | 500 | /* Generate TypeInfo. */ |
c0aebc60 IB |
501 | if (have_typeinfo_p (Type::dtypeinfo)) |
502 | create_typeinfo (d->type, NULL); | |
b4c522fa IB |
503 | |
504 | /* Generate static initializer. */ | |
99d6d3d9 IB |
505 | tree sinit = aggregate_initializer_decl (d); |
506 | DECL_INITIAL (sinit) = layout_struct_initializer (d); | |
507 | d_finish_decl (sinit); | |
b4c522fa | 508 | |
7edc15f2 IB |
509 | /* Put out the members. There might be static constructors in the members |
510 | list, and they cannot be put in separate object files. */ | |
2cbc99d1 | 511 | for (size_t i = 0; i < d->members->length; i++) |
7edc15f2 | 512 | this->build_dsymbol ((*d->members)[i]); |
b4c522fa IB |
513 | |
514 | /* Put out xopEquals, xopCmp and xopHash. */ | |
515 | if (d->xeq && d->xeq != d->xerreq) | |
7edc15f2 | 516 | this->build_dsymbol (d->xeq); |
b4c522fa IB |
517 | |
518 | if (d->xcmp && d->xcmp != d->xerrcmp) | |
7edc15f2 | 519 | this->build_dsymbol (d->xcmp); |
b4c522fa IB |
520 | |
521 | if (d->xhash) | |
7edc15f2 | 522 | this->build_dsymbol (d->xhash); |
e64deb74 | 523 | |
0fb57034 | 524 | d->semanticRun = PASS::obj; |
b4c522fa IB |
525 | } |
526 | ||
527 | /* Finish semantic analysis of functions in vtbl for class CD. */ | |
528 | ||
529 | bool finish_vtable (ClassDeclaration *d) | |
530 | { | |
531 | bool has_errors = false; | |
532 | ||
533 | /* Finish semantic analysis of functions in vtbl[]. */ | |
2cbc99d1 | 534 | for (size_t i = d->vtblOffset (); i < d->vtbl.length; i++) |
b4c522fa IB |
535 | { |
536 | FuncDeclaration *fd = d->vtbl[i]->isFuncDeclaration (); | |
537 | ||
538 | if (!fd || (!fd->fbody && d->isAbstract ())) | |
539 | continue; | |
540 | ||
541 | /* Ensure function has a return value. */ | |
542 | if (!fd->functionSemantic ()) | |
543 | has_errors = true; | |
544 | ||
545 | /* No name hiding to check for. */ | |
546 | if (!d->isFuncHidden (fd) || fd->isFuture ()) | |
547 | continue; | |
548 | ||
549 | /* The function fd is hidden from the view of the class. | |
550 | If it overlaps with any function in the vtbl[], then | |
551 | issue an error. */ | |
2cbc99d1 | 552 | for (size_t j = 1; j < d->vtbl.length; j++) |
b4c522fa IB |
553 | { |
554 | if (j == i) | |
555 | continue; | |
556 | ||
557 | FuncDeclaration *fd2 = d->vtbl[j]->isFuncDeclaration (); | |
558 | if (!fd2->ident->equals (fd->ident)) | |
559 | continue; | |
560 | ||
561 | /* The function is marked as @__future, a deprecation has | |
562 | already been given by the frontend. */ | |
563 | if (fd2->isFuture ()) | |
564 | continue; | |
565 | ||
8da8c7d3 IB |
566 | if (fd->leastAsSpecialized (fd2, NULL) != MATCH::nomatch |
567 | || fd2->leastAsSpecialized (fd, NULL) != MATCH::nomatch) | |
b4c522fa | 568 | { |
6c4db916 IB |
569 | error_at (make_location_t (fd->loc), "use of %qs", |
570 | fd->toPrettyChars ()); | |
571 | inform (make_location_t (fd2->loc), "is hidden by %qs", | |
572 | fd2->toPrettyChars ()); | |
573 | inform (make_location_t (d->loc), | |
574 | "use %<alias %s = %s.%s;%> to introduce base class " | |
575 | "overload set", fd->toChars (), | |
576 | fd->parent->toChars (), fd->toChars ()); | |
b4c522fa IB |
577 | has_errors = true; |
578 | break; | |
579 | } | |
580 | } | |
581 | } | |
582 | ||
583 | return !has_errors; | |
584 | } | |
585 | ||
586 | /* Write out compiler generated TypeInfo, initializer and vtables for the | |
587 | given class declaration, walking over all static members. */ | |
588 | ||
442cf097 | 589 | void visit (ClassDeclaration *d) final override |
b4c522fa | 590 | { |
0fb57034 | 591 | if (d->semanticRun >= PASS::obj) |
e64deb74 IB |
592 | return; |
593 | ||
5fee5ec3 | 594 | if (d->type->ty == TY::Terror) |
b4c522fa IB |
595 | { |
596 | error_at (make_location_t (d->loc), | |
597 | "had semantic errors when compiling"); | |
598 | return; | |
599 | } | |
600 | ||
f4c3ce32 IB |
601 | /* Add this decl to the current binding level. */ |
602 | tree ctype = TREE_TYPE (build_ctype (d->type)); | |
603 | if (TYPE_NAME (ctype)) | |
604 | d_pushdecl (TYPE_NAME (ctype)); | |
605 | ||
b4c522fa IB |
606 | if (!d->members) |
607 | return; | |
608 | ||
609 | /* Put out the members. */ | |
2cbc99d1 | 610 | for (size_t i = 0; i < d->members->length; i++) |
7edc15f2 | 611 | this->build_dsymbol ((*d->members)[i]); |
b4c522fa IB |
612 | |
613 | /* If something goes wrong during final semantic pass, don't bother with | |
614 | the rest as we may have incomplete info. */ | |
615 | if (!this->finish_vtable (d)) | |
616 | return; | |
617 | ||
618 | /* Generate C symbols. */ | |
619 | d->csym = get_classinfo_decl (d); | |
5fee5ec3 IB |
620 | Dsymbol *vtblsym = d->vtblSymbol (); |
621 | vtblsym->csym = get_vtable_decl (d); | |
99d6d3d9 | 622 | tree sinit = aggregate_initializer_decl (d); |
b4c522fa IB |
623 | |
624 | /* Generate static initializer. */ | |
99d6d3d9 IB |
625 | DECL_INITIAL (sinit) = layout_class_initializer (d); |
626 | d_finish_decl (sinit); | |
b4c522fa IB |
627 | |
628 | /* Put out the TypeInfo. */ | |
c0aebc60 IB |
629 | if (have_typeinfo_p (Type::dtypeinfo)) |
630 | create_typeinfo (d->type, NULL); | |
631 | ||
b4c522fa | 632 | DECL_INITIAL (d->csym) = layout_classinfo (d); |
b4c522fa IB |
633 | d_finish_decl (d->csym); |
634 | ||
635 | /* Put out the vtbl[]. */ | |
af3c19f0 | 636 | vec <constructor_elt, va_gc> *elms = NULL; |
b4c522fa IB |
637 | |
638 | /* First entry is ClassInfo reference. */ | |
639 | if (d->vtblOffset ()) | |
640 | CONSTRUCTOR_APPEND_ELT (elms, size_zero_node, build_address (d->csym)); | |
641 | ||
2cbc99d1 | 642 | for (size_t i = d->vtblOffset (); i < d->vtbl.length; i++) |
b4c522fa IB |
643 | { |
644 | FuncDeclaration *fd = d->vtbl[i]->isFuncDeclaration (); | |
645 | ||
af3c19f0 | 646 | if (fd && (fd->fbody || !d->isAbstract ())) |
b4c522fa IB |
647 | { |
648 | CONSTRUCTOR_APPEND_ELT (elms, size_int (i), | |
649 | build_address (get_symbol_decl (fd))); | |
650 | } | |
651 | } | |
652 | ||
5fee5ec3 IB |
653 | DECL_INITIAL (vtblsym->csym) |
654 | = build_constructor (TREE_TYPE (vtblsym->csym), elms); | |
655 | d_finish_decl (vtblsym->csym); | |
b4c522fa | 656 | |
0fb57034 | 657 | d->semanticRun = PASS::obj; |
b4c522fa IB |
658 | } |
659 | ||
660 | /* Write out compiler generated TypeInfo and vtables for the given interface | |
661 | declaration, walking over all static members. */ | |
662 | ||
442cf097 | 663 | void visit (InterfaceDeclaration *d) final override |
b4c522fa | 664 | { |
0fb57034 | 665 | if (d->semanticRun >= PASS::obj) |
e64deb74 IB |
666 | return; |
667 | ||
5fee5ec3 | 668 | if (d->type->ty == TY::Terror) |
b4c522fa IB |
669 | { |
670 | error_at (make_location_t (d->loc), | |
671 | "had semantic errors when compiling"); | |
672 | return; | |
673 | } | |
674 | ||
f4c3ce32 IB |
675 | /* Add this decl to the current binding level. */ |
676 | tree ctype = TREE_TYPE (build_ctype (d->type)); | |
677 | if (TYPE_NAME (ctype)) | |
678 | d_pushdecl (TYPE_NAME (ctype)); | |
679 | ||
b4c522fa IB |
680 | if (!d->members) |
681 | return; | |
682 | ||
683 | /* Put out the members. */ | |
2cbc99d1 | 684 | for (size_t i = 0; i < d->members->length; i++) |
7edc15f2 | 685 | this->build_dsymbol ((*d->members)[i]); |
b4c522fa IB |
686 | |
687 | /* Generate C symbols. */ | |
688 | d->csym = get_classinfo_decl (d); | |
689 | ||
690 | /* Put out the TypeInfo. */ | |
c0aebc60 IB |
691 | if (have_typeinfo_p (Type::dtypeinfo)) |
692 | { | |
693 | create_typeinfo (d->type, NULL); | |
7edc15f2 | 694 | this->build_dsymbol (d->type->vtinfo); |
c0aebc60 | 695 | } |
b4c522fa IB |
696 | |
697 | DECL_INITIAL (d->csym) = layout_classinfo (d); | |
b4c522fa IB |
698 | d_finish_decl (d->csym); |
699 | ||
0fb57034 | 700 | d->semanticRun = PASS::obj; |
b4c522fa IB |
701 | } |
702 | ||
703 | /* Write out compiler generated TypeInfo and initializer for the given | |
704 | enum declaration. */ | |
705 | ||
442cf097 | 706 | void visit (EnumDeclaration *d) final override |
b4c522fa | 707 | { |
0fb57034 | 708 | if (d->semanticRun >= PASS::obj) |
b4c522fa IB |
709 | return; |
710 | ||
5fee5ec3 | 711 | if (d->errors || d->type->ty == TY::Terror) |
b4c522fa IB |
712 | { |
713 | error_at (make_location_t (d->loc), | |
714 | "had semantic errors when compiling"); | |
715 | return; | |
716 | } | |
717 | ||
f4c3ce32 IB |
718 | /* Add this decl to the current binding level. */ |
719 | tree ctype = build_ctype (d->type); | |
720 | if (TREE_CODE (ctype) == ENUMERAL_TYPE && TYPE_NAME (ctype)) | |
721 | d_pushdecl (TYPE_NAME (ctype)); | |
722 | ||
b4c522fa IB |
723 | if (d->isAnonymous ()) |
724 | return; | |
725 | ||
726 | /* Generate TypeInfo. */ | |
c0aebc60 IB |
727 | if (have_typeinfo_p (Type::dtypeinfo)) |
728 | create_typeinfo (d->type, NULL); | |
b4c522fa | 729 | |
89fdaf5a | 730 | TypeEnum *tc = d->type->isTypeEnum (); |
b4c522fa IB |
731 | if (tc->sym->members && !d->type->isZeroInit ()) |
732 | { | |
733 | /* Generate static initializer. */ | |
734 | d->sinit = enum_initializer_decl (d); | |
735 | DECL_INITIAL (d->sinit) = build_expr (tc->sym->defaultval, true); | |
b4c522fa | 736 | d_finish_decl (d->sinit); |
b4c522fa IB |
737 | } |
738 | ||
0fb57034 | 739 | d->semanticRun = PASS::obj; |
b4c522fa IB |
740 | } |
741 | ||
742 | /* Finish up a variable declaration and push it into the current scope. | |
743 | This can either be a static, local or manifest constant. */ | |
744 | ||
442cf097 | 745 | void visit (VarDeclaration *d) final override |
b4c522fa | 746 | { |
0fb57034 | 747 | if (d->semanticRun >= PASS::obj) |
e64deb74 IB |
748 | return; |
749 | ||
5fee5ec3 | 750 | if (d->type->ty == TY::Terror) |
b4c522fa IB |
751 | { |
752 | error_at (make_location_t (d->loc), | |
753 | "had semantic errors when compiling"); | |
754 | return; | |
755 | } | |
756 | ||
0fb57034 IB |
757 | /* Variables of type `noreturn` are just placeholders, and evaluate to |
758 | `assert(0)` if ever read. */ | |
759 | if (d->type->isTypeNoreturn ()) | |
760 | { | |
761 | if (!d->isDataseg () && !d->isMember () | |
762 | && d->_init && !d->_init->isVoidInitializer ()) | |
763 | { | |
b6df1132 IB |
764 | /* Evaluate RHS for side effects first. */ |
765 | Expression *ie = initializerToExpression (d->_init); | |
766 | add_stmt (build_expr (ie)); | |
767 | ||
0fb57034 | 768 | Expression *e = d->type->defaultInitLiteral (d->loc); |
b6df1132 | 769 | add_stmt (build_expr (e)); |
0fb57034 IB |
770 | } |
771 | ||
772 | return; | |
773 | } | |
774 | ||
8da8c7d3 | 775 | if (d->aliasTuple) |
b4c522fa | 776 | { |
7edc15f2 | 777 | this->build_dsymbol (d->toAlias ()); |
b4c522fa IB |
778 | return; |
779 | } | |
780 | ||
b4c522fa IB |
781 | if (!d->canTakeAddressOf ()) |
782 | { | |
36c9a3fe IB |
783 | /* Do not store variables we cannot take the address of, |
784 | but keep the values for purposes of debugging. */ | |
b4c522fa | 785 | if (!d->type->isscalar ()) |
b4c522fa | 786 | { |
36c9a3fe | 787 | tree decl = get_symbol_decl (d); |
b4c522fa IB |
788 | d_pushdecl (decl); |
789 | rest_of_decl_compilation (decl, 1, 0); | |
790 | } | |
791 | } | |
91418c42 | 792 | else if (d->isDataseg ()) |
b4c522fa IB |
793 | { |
794 | tree decl = get_symbol_decl (d); | |
795 | ||
91418c42 IB |
796 | /* Only need to build the VAR_DECL for extern declarations. */ |
797 | if (d->storage_class & STCextern) | |
798 | return; | |
799 | ||
b4c522fa IB |
800 | /* Duplicated VarDeclarations map to the same symbol. Check if this |
801 | is the one declaration which will be emitted. */ | |
802 | tree ident = DECL_ASSEMBLER_NAME (decl); | |
803 | if (IDENTIFIER_DSYMBOL (ident) && IDENTIFIER_DSYMBOL (ident) != d) | |
804 | return; | |
805 | ||
806 | /* How big a symbol can be should depend on back-end. */ | |
807 | tree size = build_integer_cst (d->type->size (d->loc), | |
808 | build_ctype (Type::tsize_t)); | |
809 | if (!valid_constant_size_p (size)) | |
810 | { | |
811 | error_at (make_location_t (d->loc), "size is too large"); | |
812 | return; | |
813 | } | |
814 | ||
eacfafbc | 815 | if (d->_init) |
b4c522fa | 816 | { |
eacfafbc IB |
817 | /* Use the explicit initializer, this includes `void`. */ |
818 | if (!d->_init->isVoidInitializer ()) | |
819 | { | |
820 | Expression *e = initializerToExpression (d->_init, d->type); | |
821 | DECL_INITIAL (decl) = build_expr (e, true); | |
822 | } | |
b4c522fa | 823 | } |
8da8c7d3 | 824 | else if (!d->type->isZeroInit ()) |
b4c522fa | 825 | { |
eacfafbc | 826 | /* Use default initializer for the type. */ |
89fdaf5a IB |
827 | if (TypeStruct *ts = d->type->isTypeStruct ()) |
828 | DECL_INITIAL (decl) = layout_struct_initializer (ts->sym); | |
b4c522fa IB |
829 | else |
830 | { | |
831 | Expression *e = d->type->defaultInitLiteral (d->loc); | |
832 | DECL_INITIAL (decl) = build_expr (e, true); | |
833 | } | |
834 | } | |
835 | ||
836 | /* Frontend should have already caught this. */ | |
837 | gcc_assert (!integer_zerop (size) | |
0fb57034 | 838 | || d->type->toBasetype ()->isTypeSArray ()); |
b4c522fa IB |
839 | |
840 | d_finish_decl (decl); | |
841 | ||
842 | /* Maybe record the var against the current module. */ | |
843 | register_module_decl (d); | |
844 | } | |
845 | else if (!d->isDataseg () && !d->isMember ()) | |
846 | { | |
847 | /* This is needed for VarDeclarations in mixins that are to be local | |
848 | variables of a function. Otherwise, it would be enough to make | |
849 | a check for isVarDeclaration() in DeclarationExp codegen. */ | |
850 | declare_local_var (d); | |
851 | ||
27f698bd | 852 | if (d->_init && !d->_init->isVoidInitializer ()) |
b4c522fa IB |
853 | { |
854 | tree decl = get_symbol_decl (d); | |
855 | ||
27f698bd IB |
856 | ExpInitializer *vinit = d->_init->isExpInitializer (); |
857 | Expression *ie = initializerToExpression (vinit); | |
858 | tree exp = build_expr (ie); | |
859 | ||
860 | /* Maybe put variable on list of things needing destruction. */ | |
861 | if (d->needsScopeDtor ()) | |
b4c522fa | 862 | { |
27f698bd IB |
863 | vec_safe_push (d_function_chain->vars_in_scope, decl); |
864 | /* Force a TARGET_EXPR to add the corresponding cleanup. */ | |
865 | exp = force_target_expr (compound_expr (exp, decl)); | |
866 | TARGET_EXPR_CLEANUP (exp) = build_expr (d->edtor); | |
b4c522fa | 867 | } |
27f698bd IB |
868 | |
869 | add_stmt (exp); | |
b4c522fa IB |
870 | } |
871 | } | |
e64deb74 | 872 | |
0fb57034 | 873 | d->semanticRun = PASS::obj; |
b4c522fa IB |
874 | } |
875 | ||
876 | /* Generate and compile a static TypeInfo declaration, but only if it is | |
877 | needed in the current compilation. */ | |
878 | ||
442cf097 | 879 | void visit (TypeInfoDeclaration *d) final override |
b4c522fa | 880 | { |
0fb57034 | 881 | if (d->semanticRun >= PASS::obj) |
e64deb74 IB |
882 | return; |
883 | ||
b4c522fa IB |
884 | if (speculative_type_p (d->tinfo)) |
885 | return; | |
886 | ||
887 | tree t = get_typeinfo_decl (d); | |
888 | DECL_INITIAL (t) = layout_typeinfo (d); | |
889 | d_finish_decl (t); | |
0fb57034 | 890 | d->semanticRun = PASS::obj; |
b4c522fa IB |
891 | } |
892 | ||
893 | /* Finish up a function declaration and compile it all the way | |
894 | down to assembler language output. */ | |
895 | ||
442cf097 | 896 | void visit (FuncDeclaration *d) final override |
b4c522fa IB |
897 | { |
898 | /* Already generated the function. */ | |
0fb57034 | 899 | if (d->semanticRun >= PASS::obj) |
b4c522fa IB |
900 | return; |
901 | ||
f4c3ce32 | 902 | /* Don't emit any symbols from gcc.attributes module. */ |
b4c522fa IB |
903 | if (gcc_attribute_p (d)) |
904 | return; | |
905 | ||
8da8c7d3 IB |
906 | /* Front-end decided this function doesn't require code generation. */ |
907 | if (d->skipCodegen ()) | |
908 | return; | |
909 | ||
b4c522fa IB |
910 | /* Not emitting unittest functions. */ |
911 | if (!global.params.useUnitTests && d->isUnitTestDeclaration ()) | |
912 | return; | |
913 | ||
914 | /* Check if any errors occurred when running semantic. */ | |
89fdaf5a | 915 | if (TypeFunction *tf = d->type->isTypeFunction ()) |
b4c522fa | 916 | { |
5fee5ec3 | 917 | if (tf->next == NULL || tf->next->ty == TY::Terror) |
b4c522fa IB |
918 | return; |
919 | } | |
920 | ||
235d5a96 | 921 | if (d->hasSemantic3Errors ()) |
b4c522fa IB |
922 | return; |
923 | ||
924 | if (d->isNested ()) | |
925 | { | |
926 | FuncDeclaration *fdp = d; | |
927 | while (fdp && fdp->isNested ()) | |
928 | { | |
929 | fdp = fdp->toParent2 ()->isFuncDeclaration (); | |
930 | ||
931 | if (fdp == NULL) | |
932 | break; | |
933 | ||
934 | /* Parent failed to compile, but errors were gagged. */ | |
235d5a96 | 935 | if (fdp->hasSemantic3Errors ()) |
b4c522fa IB |
936 | return; |
937 | } | |
938 | } | |
939 | ||
940 | /* Ensure all semantic passes have run. */ | |
0fb57034 | 941 | if (d->semanticRun < PASS::semantic3) |
b4c522fa | 942 | { |
8063de4a IB |
943 | gcc_assert (!doing_semantic_analysis_p); |
944 | ||
945 | doing_semantic_analysis_p = true; | |
b4c522fa IB |
946 | d->functionSemantic3 (); |
947 | Module::runDeferredSemantic3 (); | |
8063de4a | 948 | doing_semantic_analysis_p = false; |
b4c522fa IB |
949 | } |
950 | ||
951 | if (global.errors) | |
952 | return; | |
953 | ||
04284176 IB |
954 | /* Start generating code for this function. */ |
955 | gcc_assert (d->semanticRun == PASS::semantic3done); | |
956 | d->semanticRun = PASS::obj; | |
957 | ||
b4c522fa IB |
958 | /* Duplicated FuncDeclarations map to the same symbol. Check if this |
959 | is the one declaration which will be emitted. */ | |
960 | tree fndecl = get_symbol_decl (d); | |
961 | tree ident = DECL_ASSEMBLER_NAME (fndecl); | |
962 | if (IDENTIFIER_DSYMBOL (ident) && IDENTIFIER_DSYMBOL (ident) != d) | |
963 | return; | |
964 | ||
965 | if (!d->fbody) | |
966 | { | |
967 | rest_of_decl_compilation (fndecl, 1, 0); | |
968 | return; | |
969 | } | |
970 | ||
971 | if (global.params.verbose) | |
972 | message ("function %s", d->toPrettyChars ()); | |
973 | ||
b4c522fa | 974 | tree old_context = start_function (d); |
499b0770 | 975 | tree param_list = get_fndecl_arguments (d); |
b4c522fa | 976 | |
c50eadba | 977 | DECL_IN_UNITTEST_CONDITION_P (fndecl) = this->in_version_unittest_; |
b4c522fa IB |
978 | rest_of_decl_compilation (fndecl, 1, 0); |
979 | ||
980 | /* If this is a member function that nested (possibly indirectly) in another | |
981 | function, construct an expession for this member function's static chain | |
982 | by going through parent link of nested classes. */ | |
499b0770 IB |
983 | if (d->vthis) |
984 | d_function_chain->static_chain = get_symbol_decl (d->vthis); | |
985 | ||
b4c522fa IB |
986 | if (d->isThis ()) |
987 | { | |
988 | AggregateDeclaration *ad = d->isThis (); | |
989 | tree this_tree = get_symbol_decl (d->vthis); | |
990 | ||
991 | while (ad->isNested ()) | |
992 | { | |
993 | Dsymbol *pd = ad->toParent2 (); | |
994 | tree vthis_field = get_symbol_decl (ad->vthis); | |
995 | this_tree = component_ref (build_deref (this_tree), vthis_field); | |
996 | ||
997 | ad = pd->isAggregateDeclaration (); | |
998 | if (ad == NULL) | |
999 | { | |
499b0770 | 1000 | d_function_chain->static_chain = this_tree; |
b4c522fa IB |
1001 | break; |
1002 | } | |
1003 | } | |
1004 | } | |
1005 | ||
b4c522fa IB |
1006 | /* Named return value optimisation support for D. |
1007 | Implemented by overriding all the RETURN_EXPRs and replacing all | |
1008 | occurrences of VAR with the RESULT_DECL for the function. | |
1009 | This is only worth doing for functions that can return in memory. */ | |
87e36d9b | 1010 | tree resdecl = DECL_RESULT (fndecl); |
b4c522fa | 1011 | |
87e36d9b IB |
1012 | if (TREE_ADDRESSABLE (TREE_TYPE (resdecl)) |
1013 | || aggregate_value_p (TREE_TYPE (resdecl), fndecl)) | |
b4c522fa | 1014 | { |
6bebbc03 IB |
1015 | /* Return non-trivial structs by invisible reference. */ |
1016 | if (TREE_ADDRESSABLE (TREE_TYPE (resdecl))) | |
1017 | { | |
1018 | TREE_TYPE (resdecl) = build_reference_type (TREE_TYPE (resdecl)); | |
1019 | DECL_BY_REFERENCE (resdecl) = 1; | |
1020 | TREE_ADDRESSABLE (resdecl) = 0; | |
1021 | relayout_decl (resdecl); | |
87e36d9b | 1022 | d->shidden = build_deref (resdecl); |
6bebbc03 | 1023 | } |
87e36d9b IB |
1024 | else |
1025 | d->shidden = resdecl; | |
b4c522fa | 1026 | |
235d5a96 | 1027 | if (d->isNRVO () && d->nrvo_var) |
b4c522fa IB |
1028 | { |
1029 | tree var = get_symbol_decl (d->nrvo_var); | |
1030 | ||
1031 | /* Copy name from VAR to RESULT. */ | |
1032 | DECL_NAME (resdecl) = DECL_NAME (var); | |
1033 | /* Don't forget that we take its address. */ | |
1034 | TREE_ADDRESSABLE (var) = 1; | |
6bebbc03 | 1035 | |
b4c522fa IB |
1036 | SET_DECL_VALUE_EXPR (var, resdecl); |
1037 | DECL_HAS_VALUE_EXPR_P (var) = 1; | |
87e36d9b | 1038 | SET_DECL_LANG_NRVO (var, d->shidden); |
b4c522fa IB |
1039 | } |
1040 | } | |
1041 | ||
235d5a96 IB |
1042 | /* May change cfun->static_chain. */ |
1043 | build_closure (d); | |
1044 | ||
1045 | if (d->vresult) | |
1046 | declare_local_var (d->vresult); | |
1047 | ||
1048 | if (d->v_argptr) | |
1049 | push_stmt_list (); | |
1050 | ||
b4c522fa IB |
1051 | build_function_body (d); |
1052 | ||
1053 | /* Initialize the _argptr variable. */ | |
1054 | if (d->v_argptr) | |
1055 | { | |
1056 | tree body = pop_stmt_list (); | |
1057 | tree var = get_decl_tree (d->v_argptr); | |
1058 | var = build_address (var); | |
1059 | ||
1060 | tree init = build_call_expr (builtin_decl_explicit (BUILT_IN_VA_START), | |
499b0770 | 1061 | 2, var, tree_last (param_list)); |
b4c522fa IB |
1062 | declare_local_var (d->v_argptr); |
1063 | add_stmt (init); | |
1064 | ||
1065 | tree cleanup = build_call_expr (builtin_decl_explicit (BUILT_IN_VA_END), | |
1066 | 1, var); | |
1067 | add_stmt (build2 (TRY_FINALLY_EXPR, void_type_node, body, cleanup)); | |
1068 | } | |
1069 | ||
1070 | finish_function (old_context); | |
1071 | ||
1072 | /* Maybe record the function against the current module. */ | |
1073 | register_module_decl (d); | |
1074 | } | |
1075 | }; | |
1076 | ||
1077 | /* Main entry point for the DeclVisitor interface to send | |
1078 | the Declaration AST class D to GCC back-end. */ | |
1079 | ||
1080 | void | |
1081 | build_decl_tree (Dsymbol *d) | |
1082 | { | |
1083 | location_t saved_location = input_location; | |
1084 | ||
1085 | /* Set input location, empty DECL_SOURCE_FILE can crash debug generator. */ | |
1086 | if (d->loc.filename) | |
1087 | input_location = make_location_t (d->loc); | |
1088 | else | |
1089 | input_location = make_location_t (Loc ("<no_file>", 1, 0)); | |
1090 | ||
1091 | DeclVisitor v = DeclVisitor (); | |
7edc15f2 | 1092 | v.build_dsymbol (d); |
b4c522fa IB |
1093 | |
1094 | input_location = saved_location; | |
1095 | } | |
1096 | ||
04284176 IB |
1097 | /* Returns true if function FD always needs to be implicitly defined, such as |
1098 | it was declared `pragma(inline)'. */ | |
1099 | ||
1100 | static bool | |
1101 | function_needs_inline_definition_p (FuncDeclaration *fd) | |
1102 | { | |
1103 | /* Function has already been defined. */ | |
1104 | if (!DECL_EXTERNAL (fd->csym)) | |
1105 | return false; | |
1106 | ||
04284176 IB |
1107 | /* No function body available for inlining. */ |
1108 | if (!fd->fbody) | |
1109 | return false; | |
1110 | ||
04284176 IB |
1111 | /* These functions are tied to the module they are defined in. */ |
1112 | if (fd->isFuncLiteralDeclaration () | |
1113 | || fd->isUnitTestDeclaration () | |
1114 | || fd->isFuncAliasDeclaration () | |
1115 | || fd->isInvariantDeclaration ()) | |
1116 | return false; | |
1117 | ||
1118 | /* Check whether function will be regularly defined later in the current | |
1119 | translation unit. */ | |
9fe7d3de IB |
1120 | Module *md = fd->getModule (); |
1121 | if (md && md->isRoot ()) | |
04284176 IB |
1122 | return false; |
1123 | ||
8db5b71e IB |
1124 | /* Non-inlineable functions are always external. */ |
1125 | if (DECL_UNINLINABLE (fd->csym)) | |
1126 | return false; | |
1127 | ||
1128 | /* Ignore functions that aren't decorated with `pragma(inline)'. */ | |
1129 | if (!DECL_DECLARED_INLINE_P (fd->csym)) | |
1130 | return false; | |
1131 | ||
04284176 IB |
1132 | /* Weak functions cannot be inlined. */ |
1133 | if (lookup_attribute ("weak", DECL_ATTRIBUTES (fd->csym))) | |
1134 | return false; | |
1135 | ||
1136 | /* Naked functions cannot be inlined. */ | |
1137 | if (lookup_attribute ("naked", DECL_ATTRIBUTES (fd->csym))) | |
1138 | return false; | |
1139 | ||
1140 | return true; | |
1141 | } | |
1142 | ||
8db5b71e IB |
1143 | /* If the variable or function declaration in DECL needs to be defined, add it |
1144 | to the list of deferred declarations to build later. */ | |
04284176 IB |
1145 | |
1146 | static tree | |
1147 | maybe_build_decl_tree (Declaration *decl) | |
1148 | { | |
1149 | gcc_assert (decl->csym != NULL_TREE); | |
1150 | ||
1151 | /* Still running semantic analysis on declaration, or it has already had its | |
1152 | code generated. */ | |
1153 | if (doing_semantic_analysis_p || decl->semanticRun >= PASS::obj) | |
1154 | return decl->csym; | |
1155 | ||
1156 | if (error_operand_p (decl->csym)) | |
1157 | return decl->csym; | |
1158 | ||
1159 | if (FuncDeclaration *fd = decl->isFuncDeclaration ()) | |
1160 | { | |
1161 | /* Externally defined inline functions need to be emitted. */ | |
1162 | if (function_needs_inline_definition_p (fd)) | |
1163 | { | |
1164 | DECL_EXTERNAL (fd->csym) = 0; | |
8db5b71e | 1165 | d_defer_declaration (fd); |
04284176 IB |
1166 | } |
1167 | } | |
1168 | ||
1169 | return decl->csym; | |
1170 | } | |
1171 | ||
b4c522fa IB |
1172 | /* Return the decl for the symbol, create it if it doesn't already exist. */ |
1173 | ||
1174 | tree | |
1175 | get_symbol_decl (Declaration *decl) | |
1176 | { | |
1177 | if (decl->csym) | |
04284176 | 1178 | return maybe_build_decl_tree (decl); |
b4c522fa IB |
1179 | |
1180 | /* Deal with placeholder symbols immediately: | |
1181 | SymbolDeclaration is used as a shell around an initializer symbol. */ | |
1182 | SymbolDeclaration *sd = decl->isSymbolDeclaration (); | |
1183 | if (sd) | |
1184 | { | |
1185 | decl->csym = aggregate_initializer_decl (sd->dsym); | |
1186 | return decl->csym; | |
1187 | } | |
1188 | ||
1189 | /* Global static TypeInfo declaration. */ | |
1190 | if (decl->isTypeInfoDeclaration ()) | |
1191 | return get_typeinfo_decl ((TypeInfoDeclaration *) decl); | |
1192 | ||
1193 | /* FuncAliasDeclaration is used to import functions from another scope. */ | |
1194 | FuncAliasDeclaration *fad = decl->isFuncAliasDeclaration (); | |
1195 | if (fad) | |
1196 | { | |
1197 | decl->csym = get_symbol_decl (fad->funcalias); | |
1198 | return decl->csym; | |
1199 | } | |
1200 | ||
1201 | /* It is possible for a field declaration symbol to be requested | |
1202 | before the parent type has been built. */ | |
1203 | if (decl->isField ()) | |
1204 | { | |
1205 | AggregateDeclaration *ad = decl->toParent ()->isAggregateDeclaration (); | |
1206 | gcc_assert (ad != NULL); | |
1207 | ||
1208 | /* Finishing off the type should create the associated FIELD_DECL. */ | |
1209 | build_ctype (ad->type); | |
1210 | gcc_assert (decl->csym != NULL); | |
1211 | ||
1212 | return decl->csym; | |
1213 | } | |
1214 | ||
1215 | /* Build the tree for the symbol. */ | |
1216 | FuncDeclaration *fd = decl->isFuncDeclaration (); | |
1217 | if (fd) | |
1218 | { | |
1219 | /* Run full semantic on functions we need to know about. */ | |
1220 | if (!fd->functionSemantic ()) | |
1221 | { | |
1222 | decl->csym = error_mark_node; | |
1223 | return decl->csym; | |
1224 | } | |
1225 | ||
1226 | decl->csym = build_decl (make_location_t (decl->loc), FUNCTION_DECL, | |
1227 | get_identifier (decl->ident->toChars ()), | |
1228 | NULL_TREE); | |
1229 | ||
1230 | /* Set function type afterwards as there could be self references. */ | |
1231 | TREE_TYPE (decl->csym) = build_ctype (fd->type); | |
1232 | ||
013fca64 IB |
1233 | /* Set DECL_INITIAL now if the function has a definition. */ |
1234 | if (fd->fbody) | |
1235 | DECL_INITIAL (decl->csym) = error_mark_node; | |
1236 | else | |
b4c522fa IB |
1237 | DECL_EXTERNAL (decl->csym) = 1; |
1238 | } | |
1239 | else | |
1240 | { | |
1241 | /* Build the variable declaration. */ | |
1242 | VarDeclaration *vd = decl->isVarDeclaration (); | |
1243 | gcc_assert (vd != NULL); | |
1244 | ||
1245 | tree_code code = vd->isParameter () ? PARM_DECL | |
1246 | : !vd->canTakeAddressOf () ? CONST_DECL | |
1247 | : VAR_DECL; | |
1248 | decl->csym = build_decl (make_location_t (decl->loc), code, | |
1249 | get_identifier (decl->ident->toChars ()), | |
1250 | declaration_type (vd)); | |
1251 | ||
1252 | /* If any alignment was set on the declaration. */ | |
0fb57034 | 1253 | if (!vd->alignment.isDefault ()) |
b4c522fa | 1254 | { |
0fb57034 | 1255 | SET_DECL_ALIGN (decl->csym, vd->alignment.get () * BITS_PER_UNIT); |
b4c522fa IB |
1256 | DECL_USER_ALIGN (decl->csym) = 1; |
1257 | } | |
1258 | ||
1259 | if (vd->storage_class & STCextern) | |
1260 | DECL_EXTERNAL (decl->csym) = 1; | |
36c9a3fe IB |
1261 | |
1262 | /* CONST_DECL was initially intended for enumerals and may be used for | |
1263 | scalars in general, but not for aggregates. Here a non-constant | |
1264 | value is generated anyway so as the CONST_DECL only serves as a | |
1265 | placeholder for the value, however the DECL itself should never be | |
1266 | referenced in any generated code, or passed to the back-end. */ | |
1267 | if (vd->storage_class & STCmanifest) | |
1268 | { | |
1269 | /* Cannot make an expression out of a void initializer. */ | |
1270 | if (vd->_init && !vd->_init->isVoidInitializer ()) | |
1271 | { | |
1272 | Expression *ie = initializerToExpression (vd->_init); | |
1273 | ||
1274 | if (!vd->type->isscalar ()) | |
1275 | DECL_INITIAL (decl->csym) = build_expr (ie, false); | |
1276 | else | |
1277 | DECL_INITIAL (decl->csym) = build_expr (ie, true); | |
1278 | } | |
1279 | } | |
61b1c562 IB |
1280 | |
1281 | /* [type-qualifiers/const-and-immutable] | |
1282 | ||
1283 | `immutable` applies to data that cannot change. Immutable data values, | |
1284 | once constructed, remain the same for the duration of the program's | |
1285 | execution. */ | |
1286 | if (vd->isImmutable () && !vd->setInCtorOnly ()) | |
1287 | TREE_READONLY (decl->csym) = 1; | |
1288 | ||
1289 | /* `const` applies to data that cannot be changed by the const reference | |
1290 | to that data. It may, however, be changed by another reference to that | |
1291 | same data. */ | |
1292 | if (vd->isConst () && !vd->isDataseg ()) | |
1293 | TREE_READONLY (decl->csym) = 1; | |
b4c522fa IB |
1294 | } |
1295 | ||
1296 | /* Set the declaration mangled identifier if static. */ | |
1297 | if (decl->isCodeseg () || decl->isDataseg ()) | |
1298 | { | |
1299 | tree mangled_name; | |
1300 | ||
98866120 IB |
1301 | if (decl->mangleOverride.length) |
1302 | { | |
1303 | mangled_name = | |
1304 | get_identifier_with_length (decl->mangleOverride.ptr, | |
1305 | decl->mangleOverride.length); | |
1306 | } | |
b4c522fa | 1307 | else |
b5446d0c | 1308 | mangled_name = get_identifier (d_mangle_decl (decl)); |
b4c522fa IB |
1309 | |
1310 | mangled_name = targetm.mangle_decl_assembler_name (decl->csym, | |
1311 | mangled_name); | |
1312 | /* The frontend doesn't handle duplicate definitions of unused symbols | |
1313 | with the same mangle. So a check is done here instead. */ | |
013fca64 | 1314 | if (IDENTIFIER_DSYMBOL (mangled_name)) |
b4c522fa | 1315 | { |
013fca64 IB |
1316 | Declaration *other = IDENTIFIER_DSYMBOL (mangled_name); |
1317 | tree olddecl = decl->csym; | |
1318 | decl->csym = get_symbol_decl (other); | |
b4c522fa | 1319 | |
8e84a142 IB |
1320 | /* Update the symbol location to the current definition. */ |
1321 | if (DECL_EXTERNAL (decl->csym) && !DECL_INITIAL (decl->csym)) | |
1322 | DECL_SOURCE_LOCATION (decl->csym) = DECL_SOURCE_LOCATION (olddecl); | |
1323 | ||
013fca64 IB |
1324 | /* The current declaration is a prototype or marked extern, merge |
1325 | applied user attributes and return. */ | |
1326 | if (DECL_EXTERNAL (olddecl) && !DECL_INITIAL (olddecl)) | |
1327 | { | |
1328 | apply_user_attributes (decl, decl->csym); | |
b4c522fa IB |
1329 | return decl->csym; |
1330 | } | |
013fca64 IB |
1331 | /* The previous declaration is a prototype or marked extern, set the |
1332 | current declaration as the main reference of the symbol. */ | |
1333 | else if (DECL_EXTERNAL (decl->csym) && !DECL_INITIAL (decl->csym)) | |
1334 | { | |
1335 | IDENTIFIER_DSYMBOL (mangled_name) = decl; | |
1336 | DECL_EXTERNAL (decl->csym) = 0; | |
1337 | } | |
1338 | /* Non-extern, non-templated decls shouldn't be defined twice. */ | |
1339 | else if (!decl->isInstantiated ()) | |
1340 | ScopeDsymbol::multiplyDefined (decl->loc, decl, other); | |
1341 | } | |
1342 | else | |
1343 | { | |
b4c522fa IB |
1344 | IDENTIFIER_PRETTY_NAME (mangled_name) |
1345 | = get_identifier (decl->toPrettyChars (true)); | |
1346 | IDENTIFIER_DSYMBOL (mangled_name) = decl; | |
b4c522fa | 1347 | |
013fca64 IB |
1348 | SET_DECL_ASSEMBLER_NAME (decl->csym, mangled_name); |
1349 | } | |
b4c522fa IB |
1350 | } |
1351 | ||
1352 | DECL_LANG_SPECIFIC (decl->csym) = build_lang_decl (decl); | |
1353 | DECL_CONTEXT (decl->csym) = d_decl_context (decl); | |
1354 | ||
1355 | if (TREE_CODE (decl->csym) == PARM_DECL) | |
1356 | { | |
1357 | /* Pass non-trivial structs by invisible reference. */ | |
1358 | if (TREE_ADDRESSABLE (TREE_TYPE (decl->csym))) | |
1359 | { | |
1360 | tree argtype = build_reference_type (TREE_TYPE (decl->csym)); | |
1361 | argtype = build_qualified_type (argtype, TYPE_QUAL_RESTRICT); | |
1362 | gcc_assert (!DECL_BY_REFERENCE (decl->csym)); | |
1363 | TREE_TYPE (decl->csym) = argtype; | |
1364 | DECL_BY_REFERENCE (decl->csym) = 1; | |
1365 | TREE_ADDRESSABLE (decl->csym) = 0; | |
1366 | relayout_decl (decl->csym); | |
1367 | decl->storage_class |= STCref; | |
1368 | } | |
1369 | ||
1370 | DECL_ARG_TYPE (decl->csym) = TREE_TYPE (decl->csym); | |
1371 | gcc_assert (TREE_CODE (DECL_CONTEXT (decl->csym)) == FUNCTION_DECL); | |
1372 | } | |
1373 | else if (TREE_CODE (decl->csym) == CONST_DECL) | |
1374 | { | |
1375 | /* Manifest constants have no address in memory. */ | |
1376 | TREE_CONSTANT (decl->csym) = 1; | |
1377 | TREE_READONLY (decl->csym) = 1; | |
1378 | } | |
1379 | else if (TREE_CODE (decl->csym) == FUNCTION_DECL) | |
1380 | { | |
5fee5ec3 IB |
1381 | /* Dual-context functions require the code generation to build an array |
1382 | for the context pointer of the function, making the delicate task of | |
1383 | tracking which context to follow when encountering a non-local symbol, | |
1384 | and so are a not planned to be supported. */ | |
1385 | if (fd->needThis () && !fd->isMember2 ()) | |
1386 | { | |
1387 | fatal_error (make_location_t (fd->loc), | |
1388 | "function requires a dual-context, which is not yet " | |
1389 | "supported by GDC"); | |
1390 | } | |
1391 | ||
b4c522fa IB |
1392 | /* The real function type may differ from its declaration. */ |
1393 | tree fntype = TREE_TYPE (decl->csym); | |
1394 | tree newfntype = NULL_TREE; | |
1395 | ||
1396 | if (fd->isNested ()) | |
1397 | { | |
1398 | /* Add an extra argument for the frame/closure pointer, this is also | |
1399 | required to be compatible with D delegates. */ | |
1400 | newfntype = build_vthis_function (void_type_node, fntype); | |
1401 | } | |
1402 | else if (fd->isThis ()) | |
1403 | { | |
cdbf48be | 1404 | /* Add an extra argument for the `this' parameter. The handle type is |
b4c522fa IB |
1405 | used even if there is no debug info. It is needed to make sure |
1406 | virtual member functions are not called statically. */ | |
1407 | AggregateDeclaration *ad = fd->isMember2 (); | |
1408 | tree handle = build_ctype (ad->handleType ()); | |
1409 | ||
1410 | /* If handle is a pointer type, get record type. */ | |
1411 | if (!ad->isStructDeclaration ()) | |
1412 | handle = TREE_TYPE (handle); | |
1413 | ||
1414 | newfntype = build_vthis_function (handle, fntype); | |
1415 | ||
1416 | /* Set the vindex on virtual functions. */ | |
1417 | if (fd->isVirtual () && fd->vtblIndex != -1) | |
1418 | { | |
1419 | DECL_VINDEX (decl->csym) = size_int (fd->vtblIndex); | |
1420 | DECL_VIRTUAL_P (decl->csym) = 1; | |
1421 | } | |
213b7d9c IB |
1422 | |
1423 | /* Align method to the minimum boundary for target. */ | |
1424 | SET_DECL_ALIGN (decl->csym, MINIMUM_METHOD_BOUNDARY); | |
b4c522fa IB |
1425 | } |
1426 | else if (fd->isMain () || fd->isCMain ()) | |
1427 | { | |
cdbf48be | 1428 | /* The main function is named `D main' to distinguish from C main. */ |
b4c522fa IB |
1429 | if (fd->isMain ()) |
1430 | DECL_NAME (decl->csym) = get_identifier (fd->toPrettyChars (true)); | |
1431 | ||
cdbf48be | 1432 | /* `void main' is implicitly converted to returning an int. */ |
b4c522fa IB |
1433 | newfntype = build_function_type (d_int_type, TYPE_ARG_TYPES (fntype)); |
1434 | } | |
1435 | ||
1436 | if (newfntype != NULL_TREE) | |
1437 | { | |
1438 | /* Copy the old attributes from the original type. */ | |
1439 | TYPE_ATTRIBUTES (newfntype) = TYPE_ATTRIBUTES (fntype); | |
1440 | TYPE_LANG_SPECIFIC (newfntype) = TYPE_LANG_SPECIFIC (fntype); | |
1441 | TREE_ADDRESSABLE (newfntype) = TREE_ADDRESSABLE (fntype); | |
1442 | TREE_TYPE (decl->csym) = newfntype; | |
1443 | d_keep (newfntype); | |
1444 | } | |
1445 | ||
1446 | /* Miscellaneous function flags. */ | |
b4c522fa | 1447 | |
cdbf48be | 1448 | /* In [pragma/inline], functions decorated with `pragma(inline)' affects |
67e3020b | 1449 | whether they are inlined or not. */ |
5fee5ec3 | 1450 | if (fd->inlining == PINLINE::always) |
67e3020b | 1451 | DECL_DECLARED_INLINE_P (decl->csym) = 1; |
5fee5ec3 | 1452 | else if (fd->inlining == PINLINE::never) |
67e3020b IB |
1453 | DECL_UNINLINABLE (decl->csym) = 1; |
1454 | ||
0fb57034 IB |
1455 | /* In [pragma/crtctor], Annotates a function so it is run after the C |
1456 | runtime library is initialized and before the D runtime library is | |
1457 | initialized. */ | |
235d5a96 | 1458 | if (fd->isCrtCtor ()) |
0fb57034 IB |
1459 | { |
1460 | DECL_STATIC_CONSTRUCTOR (decl->csym) = 1; | |
1461 | decl_init_priority_insert (decl->csym, DEFAULT_INIT_PRIORITY); | |
1462 | } | |
235d5a96 | 1463 | else if (fd->isCrtDtor ()) |
0fb57034 IB |
1464 | { |
1465 | DECL_STATIC_DESTRUCTOR (decl->csym) = 1; | |
1466 | decl_fini_priority_insert (decl->csym, DEFAULT_INIT_PRIORITY); | |
235d5a96 | 1467 | } |
0fb57034 | 1468 | |
cdbf48be | 1469 | /* Function was declared `naked'. */ |
235d5a96 | 1470 | if (fd->isNaked ()) |
b4c522fa IB |
1471 | { |
1472 | insert_decl_attribute (decl->csym, "naked"); | |
1473 | DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl->csym) = 1; | |
1474 | } | |
1475 | ||
423d34f6 IB |
1476 | /* In [expression/function_literals], function literals (aka lambdas) |
1477 | enable embedding anonymous functions and anonymous delegates directly | |
1478 | into expressions. They are defined in each referencing module. */ | |
1479 | if (fd->isFuncLiteralDeclaration ()) | |
1480 | DECL_SET_LAMBDA_FUNCTION (decl->csym, true); | |
1481 | ||
76a7e7e7 | 1482 | /* Mark compiler generated functions as artificial. */ |
235d5a96 | 1483 | if (fd->isGenerated ()) |
76a7e7e7 IB |
1484 | DECL_ARTIFICIAL (decl->csym) = 1; |
1485 | ||
76a7e7e7 IB |
1486 | /* Ensure and require contracts are lexically nested in the function they |
1487 | part of, but are always publicly callable. */ | |
b4c522fa IB |
1488 | if (fd->ident == Identifier::idPool ("ensure") |
1489 | || fd->ident == Identifier::idPool ("require")) | |
76a7e7e7 | 1490 | TREE_PUBLIC (decl->csym) = 1; |
b4c522fa IB |
1491 | |
1492 | if (decl->storage_class & STCfinal) | |
1493 | DECL_FINAL_P (decl->csym) = 1; | |
1494 | ||
5a0aa603 | 1495 | /* Function is of type `noreturn' or `typeof(*null)'. */ |
0fb57034 | 1496 | if (fd->type->nextOf ()->isTypeNoreturn ()) |
5a0aa603 IB |
1497 | TREE_THIS_VOLATILE (decl->csym) = 1; |
1498 | ||
b4c522fa IB |
1499 | /* Check whether this function is expanded by the frontend. */ |
1500 | DECL_INTRINSIC_CODE (decl->csym) = INTRINSIC_NONE; | |
1501 | maybe_set_intrinsic (fd); | |
1502 | ||
1503 | /* For nested functions in particular, unnest fndecl in the cgraph, as | |
1504 | all static chain passing is handled by the front-end. Do this even | |
1505 | if we are not emitting the body. */ | |
1506 | struct cgraph_node *node = cgraph_node::get_create (decl->csym); | |
89576d86 JH |
1507 | if (nested_function_origin (node)) |
1508 | unnest_function (node); | |
b4c522fa IB |
1509 | } |
1510 | ||
1511 | /* Mark compiler generated temporaries as artificial. */ | |
1512 | if (decl->storage_class & STCtemp) | |
1513 | DECL_ARTIFICIAL (decl->csym) = 1; | |
1514 | ||
1515 | /* Propagate shared on the decl. */ | |
1516 | if (TYPE_SHARED (TREE_TYPE (decl->csym))) | |
1517 | TREE_ADDRESSABLE (decl->csym) = 1; | |
1518 | ||
1519 | /* Symbol was marked volatile. */ | |
1520 | if (decl->storage_class & STCvolatile) | |
1521 | TREE_THIS_VOLATILE (decl->csym) = 1; | |
1522 | ||
91418c42 IB |
1523 | /* Symbol was marked register. */ |
1524 | if (decl->storage_class & STCregister) | |
1525 | DECL_REGISTER (decl->csym) = 1; | |
1526 | ||
1527 | /* Symbol was declared with deprecated attribute. */ | |
b4c522fa IB |
1528 | if (decl->storage_class & STCdeprecated) |
1529 | TREE_DEPRECATED (decl->csym) = 1; | |
1530 | ||
b4c522fa IB |
1531 | if (decl->isDataseg () || decl->isCodeseg () || decl->isThreadlocal ()) |
1532 | { | |
1533 | /* Set TREE_PUBLIC by default, but allow private template to override. */ | |
1534 | if (!fd || !fd->isNested ()) | |
1535 | TREE_PUBLIC (decl->csym) = 1; | |
1536 | ||
1537 | TREE_STATIC (decl->csym) = 1; | |
1538 | /* The decl has not been defined -- yet. */ | |
1539 | DECL_EXTERNAL (decl->csym) = 1; | |
1540 | ||
636b01ab IB |
1541 | /* Visibility attributes are used by the debugger. */ |
1542 | set_visibility_for_decl (decl->csym, decl); | |
1543 | ||
76a7e7e7 IB |
1544 | DECL_INSTANTIATED (decl->csym) = (decl->isInstantiated () != NULL); |
1545 | set_linkage_for_decl (decl->csym); | |
b4c522fa IB |
1546 | } |
1547 | ||
1548 | /* Symbol is going in thread local storage. */ | |
1549 | if (decl->isThreadlocal () && !DECL_ARTIFICIAL (decl->csym)) | |
1550 | { | |
1551 | if (global.params.vtls) | |
1552 | message (decl->loc, "`%s` is thread local", decl->toChars ()); | |
1553 | ||
1554 | set_decl_tls_model (decl->csym, decl_default_tls_model (decl->csym)); | |
1555 | } | |
1556 | ||
1557 | /* Apply any user attributes that may affect semantic meaning. */ | |
013fca64 | 1558 | apply_user_attributes (decl, decl->csym); |
b4c522fa | 1559 | |
91418c42 IB |
1560 | /* Handle any conflicts between D language attributes and compiler-recognized |
1561 | * user attributes. */ | |
1562 | if (VAR_P (decl->csym) && DECL_HARD_REGISTER (decl->csym)) | |
1563 | { | |
1564 | if (decl->storage_class & STCextern) | |
1565 | error_at (make_location_t (decl->loc), "explicit register variable " | |
1566 | "%qs declared %<extern%>", decl->toChars ()); | |
1567 | else if (decl->isThreadlocal ()) | |
1568 | error_at (make_location_t (decl->loc), "explicit register variable " | |
1569 | "%qs declared thread local", decl->toChars ()); | |
1570 | } | |
1571 | ||
b4c522fa IB |
1572 | /* %% Probably should be a little more intelligent about setting this. */ |
1573 | TREE_USED (decl->csym) = 1; | |
1574 | d_keep (decl->csym); | |
1575 | ||
04284176 | 1576 | return maybe_build_decl_tree (decl); |
b4c522fa IB |
1577 | } |
1578 | ||
1579 | /* Returns a declaration for a VAR_DECL. Used to create compiler-generated | |
1580 | global variables. */ | |
1581 | ||
1582 | tree | |
1583 | declare_extern_var (tree ident, tree type) | |
1584 | { | |
1585 | /* If the VAR_DECL has already been declared, return it. */ | |
1586 | if (IDENTIFIER_DECL_TREE (ident)) | |
1587 | return IDENTIFIER_DECL_TREE (ident); | |
1588 | ||
1589 | tree name = IDENTIFIER_PRETTY_NAME (ident) | |
1590 | ? IDENTIFIER_PRETTY_NAME (ident) : ident; | |
1591 | tree decl = build_decl (input_location, VAR_DECL, name, type); | |
1592 | ||
1593 | IDENTIFIER_DECL_TREE (ident) = decl; | |
1594 | d_keep (decl); | |
1595 | ||
1596 | SET_DECL_ASSEMBLER_NAME (decl, ident); | |
1597 | DECL_ARTIFICIAL (decl) = 1; | |
1598 | TREE_STATIC (decl) = 1; | |
1599 | TREE_PUBLIC (decl) = 1; | |
1600 | ||
1601 | /* The decl has not been defined -- yet. */ | |
1602 | DECL_EXTERNAL (decl) = 1; | |
1603 | ||
5b63eb17 IB |
1604 | set_linkage_for_decl (decl); |
1605 | ||
b4c522fa IB |
1606 | return decl; |
1607 | } | |
1608 | ||
1609 | /* Add local variable VAR into the current function body. */ | |
1610 | ||
1611 | void | |
1612 | declare_local_var (VarDeclaration *var) | |
1613 | { | |
1614 | gcc_assert (!var->isDataseg () && !var->isMember ()); | |
1615 | gcc_assert (current_function_decl != NULL_TREE); | |
1616 | ||
1617 | FuncDeclaration *fd = cfun->language->function; | |
1618 | tree decl = get_symbol_decl (var); | |
1619 | ||
1620 | gcc_assert (!TREE_STATIC (decl)); | |
1621 | d_pushdecl (decl); | |
1622 | DECL_CONTEXT (decl) = current_function_decl; | |
1623 | ||
1624 | /* Compiler generated symbols. */ | |
1625 | if (var == fd->vresult || var == fd->v_argptr) | |
1626 | DECL_ARTIFICIAL (decl) = 1; | |
1627 | ||
1628 | if (DECL_LANG_FRAME_FIELD (decl)) | |
1629 | { | |
1630 | /* Fixes debugging local variables. */ | |
1631 | SET_DECL_VALUE_EXPR (decl, get_decl_tree (var)); | |
1632 | DECL_HAS_VALUE_EXPR_P (decl) = 1; | |
1633 | } | |
1634 | } | |
1635 | ||
1636 | /* Return an unnamed local temporary of type TYPE. */ | |
1637 | ||
1638 | tree | |
1639 | build_local_temp (tree type) | |
1640 | { | |
ad4c44d2 | 1641 | tree decl = create_tmp_var_raw (type); |
b4c522fa IB |
1642 | d_pushdecl (decl); |
1643 | ||
1644 | return decl; | |
1645 | } | |
1646 | ||
1647 | /* Return the correct decl to be used for DECL. For VAR_DECLs, this could | |
1648 | instead be a FIELD_DECL from a closure, or a RESULT_DECL from a named return | |
1649 | value. For PARM_DECLs, this could be a FIELD_DECL for a non-local `this'. | |
1650 | For all other kinds of decls, this just returns the result of | |
1651 | get_symbol_decl(). */ | |
1652 | ||
1653 | tree | |
1654 | get_decl_tree (Declaration *decl) | |
1655 | { | |
1656 | tree t = get_symbol_decl (decl); | |
1657 | FuncDeclaration *fd = cfun ? cfun->language->function : NULL; | |
1658 | VarDeclaration *vd = decl->isVarDeclaration (); | |
1659 | ||
1660 | /* If cfun is NULL, then this is a global static. */ | |
1661 | if (vd == NULL || fd == NULL) | |
1662 | return t; | |
1663 | ||
b4c522fa IB |
1664 | /* Get the closure holding the var decl. */ |
1665 | if (DECL_LANG_FRAME_FIELD (t)) | |
1666 | { | |
1667 | FuncDeclaration *parent = vd->toParent2 ()->isFuncDeclaration (); | |
1668 | tree frame_ref = get_framedecl (fd, parent); | |
1669 | ||
235d5a96 IB |
1670 | tree field = component_ref (build_deref (frame_ref), |
1671 | DECL_LANG_FRAME_FIELD (t)); | |
1672 | /* Frame field can also be a reference to the DECL_RESULT of a function. | |
1673 | Dereference it to get the value. */ | |
1674 | if (DECL_LANG_NRVO (t)) | |
1675 | field = build_deref (field); | |
1676 | ||
1677 | return field; | |
b4c522fa IB |
1678 | } |
1679 | ||
235d5a96 IB |
1680 | /* Get the named return value. */ |
1681 | if (DECL_LANG_NRVO (t)) | |
1682 | return DECL_LANG_NRVO (t); | |
1683 | ||
cdbf48be | 1684 | /* Get the non-local `this' value by going through parent link |
b4c522fa IB |
1685 | of nested classes, this routine pretty much undoes what |
1686 | getRightThis in the frontend removes from codegen. */ | |
1687 | if (vd->parent != fd && vd->isThisDeclaration ()) | |
1688 | { | |
1689 | /* Find the first parent that is a member function. */ | |
1690 | while (!fd->isMember2 ()) | |
1691 | { | |
1692 | gcc_assert (fd->vthis); | |
1693 | fd = fd->toParent2 ()->isFuncDeclaration (); | |
1694 | gcc_assert (fd != NULL); | |
1695 | } | |
1696 | ||
1697 | AggregateDeclaration *ad = fd->isThis (); | |
1698 | gcc_assert (ad != NULL); | |
1699 | ||
2b1c2a4b IB |
1700 | /* The parent function is for the same `this' declaration we are |
1701 | building a chain to. Non-local declaration is inaccessible. */ | |
1702 | if (fd->vthis == vd) | |
1703 | return error_no_frame_access (fd); | |
1704 | ||
b4c522fa IB |
1705 | t = get_decl_tree (fd->vthis); |
1706 | Dsymbol *outer = fd; | |
1707 | ||
1708 | while (outer != vd->parent) | |
1709 | { | |
1710 | gcc_assert (ad != NULL); | |
1711 | outer = ad->toParent2 (); | |
1712 | ||
1713 | /* Get the this->this parent link. */ | |
1714 | tree vfield = get_symbol_decl (ad->vthis); | |
1715 | t = component_ref (build_deref (t), vfield); | |
1716 | ||
1717 | ad = outer->isAggregateDeclaration (); | |
1718 | if (ad != NULL) | |
1719 | continue; | |
1720 | ||
1721 | fd = outer->isFuncDeclaration (); | |
1722 | while (fd != NULL) | |
1723 | { | |
cdbf48be | 1724 | /* If outer function creates a closure, then the `this' |
b4c522fa | 1725 | value would be the closure pointer, and the real |
cdbf48be | 1726 | `this' the first field of that closure. */ |
b4c522fa IB |
1727 | tree ff = get_frameinfo (fd); |
1728 | if (FRAMEINFO_CREATES_FRAME (ff)) | |
1729 | { | |
1730 | t = build_nop (build_pointer_type (FRAMEINFO_TYPE (ff)), t); | |
1731 | t = indirect_ref (build_ctype (fd->vthis->type), t); | |
1732 | } | |
1733 | ||
1734 | if (fd == vd->parent) | |
1735 | break; | |
1736 | ||
1737 | /* Continue looking for the right `this'. */ | |
1738 | outer = outer->toParent2 (); | |
1739 | fd = outer->isFuncDeclaration (); | |
1740 | } | |
1741 | ||
1742 | ad = outer->isAggregateDeclaration (); | |
1743 | } | |
1744 | ||
1745 | return t; | |
1746 | } | |
1747 | ||
1748 | /* Auto variable that the back end will handle for us. */ | |
1749 | return t; | |
1750 | } | |
1751 | ||
1752 | /* Finish up a variable declaration and compile it all the way to | |
1753 | the assembler language output. */ | |
1754 | ||
1755 | void | |
1756 | d_finish_decl (tree decl) | |
1757 | { | |
1758 | gcc_assert (!error_operand_p (decl)); | |
1759 | ||
1760 | /* We are sending this symbol to object file, can't be extern. */ | |
1761 | TREE_STATIC (decl) = 1; | |
1762 | DECL_EXTERNAL (decl) = 0; | |
1763 | ||
1764 | /* Update the TLS model as the linkage has been modified. */ | |
1765 | if (DECL_THREAD_LOCAL_P (decl)) | |
1766 | set_decl_tls_model (decl, decl_default_tls_model (decl)); | |
1767 | ||
1768 | relayout_decl (decl); | |
1769 | ||
1770 | if (flag_checking && DECL_INITIAL (decl)) | |
1771 | { | |
1772 | /* Initializer must never be bigger than symbol size. */ | |
d6ec661e IB |
1773 | HOST_WIDE_INT tsize = int_size_in_bytes (TREE_TYPE (decl)); |
1774 | HOST_WIDE_INT dtsize = | |
1775 | int_size_in_bytes (TREE_TYPE (DECL_INITIAL (decl))); | |
b4c522fa IB |
1776 | |
1777 | if (tsize < dtsize) | |
1778 | { | |
1779 | tree name = DECL_ASSEMBLER_NAME (decl); | |
1780 | ||
206222e0 | 1781 | internal_error ("mismatch between declaration %qE size (%wd) and " |
e97cfaa9 | 1782 | "its initializer size (%wd)", |
b4c522fa IB |
1783 | IDENTIFIER_PRETTY_NAME (name) |
1784 | ? IDENTIFIER_PRETTY_NAME (name) : name, | |
1785 | tsize, dtsize); | |
1786 | } | |
1787 | } | |
1788 | ||
1789 | /* Without weak symbols, symbol should be put in .common, but that can't | |
1790 | be done if there is a nonzero initializer. */ | |
1791 | if (DECL_COMDAT (decl) && DECL_COMMON (decl) | |
1792 | && initializer_zerop (DECL_INITIAL (decl))) | |
1793 | DECL_INITIAL (decl) = error_mark_node; | |
1794 | ||
1795 | /* Add this decl to the current binding level. */ | |
1796 | d_pushdecl (decl); | |
1797 | ||
1798 | rest_of_decl_compilation (decl, 1, 0); | |
1799 | } | |
1800 | ||
1801 | /* Thunk code is based on g++. */ | |
1802 | ||
1803 | static int thunk_labelno; | |
1804 | ||
1805 | /* Create a static alias to function. */ | |
1806 | ||
1807 | static tree | |
1808 | make_alias_for_thunk (tree function) | |
1809 | { | |
1810 | tree alias; | |
1811 | char buf[256]; | |
1812 | ||
1813 | /* Thunks may reference extern functions which cannot be aliased. */ | |
1814 | if (DECL_EXTERNAL (function)) | |
1815 | return function; | |
1816 | ||
1817 | targetm.asm_out.generate_internal_label (buf, "LTHUNK", thunk_labelno); | |
1818 | thunk_labelno++; | |
1819 | ||
1820 | alias = build_decl (DECL_SOURCE_LOCATION (function), FUNCTION_DECL, | |
1821 | get_identifier (buf), TREE_TYPE (function)); | |
1822 | DECL_LANG_SPECIFIC (alias) = DECL_LANG_SPECIFIC (function); | |
1823 | lang_hooks.dup_lang_specific_decl (alias); | |
1824 | DECL_CONTEXT (alias) = NULL_TREE; | |
1825 | TREE_READONLY (alias) = TREE_READONLY (function); | |
1826 | TREE_THIS_VOLATILE (alias) = TREE_THIS_VOLATILE (function); | |
1827 | TREE_PUBLIC (alias) = 0; | |
1828 | ||
1829 | DECL_EXTERNAL (alias) = 0; | |
1830 | DECL_ARTIFICIAL (alias) = 1; | |
1831 | ||
1832 | DECL_DECLARED_INLINE_P (alias) = 0; | |
1833 | DECL_INITIAL (alias) = error_mark_node; | |
1834 | DECL_ARGUMENTS (alias) = copy_list (DECL_ARGUMENTS (function)); | |
1835 | ||
1836 | TREE_ADDRESSABLE (alias) = 1; | |
1837 | TREE_USED (alias) = 1; | |
1838 | SET_DECL_ASSEMBLER_NAME (alias, DECL_NAME (alias)); | |
1839 | ||
1840 | if (!flag_syntax_only) | |
1841 | { | |
1842 | cgraph_node *aliasn; | |
1843 | aliasn = cgraph_node::create_same_body_alias (alias, function); | |
1844 | gcc_assert (aliasn != NULL); | |
1845 | } | |
1846 | return alias; | |
1847 | } | |
1848 | ||
1849 | /* Emit the definition of a D vtable thunk. */ | |
1850 | ||
1851 | static void | |
1852 | finish_thunk (tree thunk, tree function) | |
1853 | { | |
1854 | /* Setup how D thunks are outputted. */ | |
1855 | int fixed_offset = -THUNK_LANG_OFFSET (thunk); | |
1856 | bool this_adjusting = true; | |
1857 | tree alias; | |
1858 | ||
1859 | if (TARGET_USE_LOCAL_THUNK_ALIAS_P (function)) | |
1860 | alias = make_alias_for_thunk (function); | |
1861 | else | |
1862 | alias = function; | |
1863 | ||
1864 | TREE_ADDRESSABLE (function) = 1; | |
1865 | TREE_USED (function) = 1; | |
d1bddcaf | 1866 | DECL_EXTERNAL (thunk) = 0; |
b4c522fa IB |
1867 | |
1868 | if (flag_syntax_only) | |
1869 | { | |
1870 | TREE_ASM_WRITTEN (thunk) = 1; | |
1871 | return; | |
1872 | } | |
1873 | ||
1874 | if (TARGET_USE_LOCAL_THUNK_ALIAS_P (function) | |
1875 | && targetm_common.have_named_sections) | |
1876 | { | |
1877 | tree fn = function; | |
1878 | symtab_node *symbol = symtab_node::get (function); | |
1879 | ||
1880 | if (symbol != NULL && symbol->alias) | |
1881 | { | |
1882 | if (symbol->analyzed) | |
1883 | fn = symtab_node::get (function)->ultimate_alias_target ()->decl; | |
1884 | else | |
1885 | fn = symtab_node::get (function)->alias_target; | |
1886 | } | |
1887 | resolve_unique_section (fn, 0, flag_function_sections); | |
1888 | ||
1889 | if (DECL_SECTION_NAME (fn) != NULL && DECL_ONE_ONLY (fn)) | |
1890 | { | |
1891 | resolve_unique_section (thunk, 0, flag_function_sections); | |
1892 | ||
1893 | /* Output the thunk into the same section as function. */ | |
8b9a92f7 | 1894 | set_decl_section_name (thunk, fn); |
b4c522fa IB |
1895 | symtab_node::get (thunk)->implicit_section |
1896 | = symtab_node::get (fn)->implicit_section; | |
1897 | } | |
1898 | } | |
1899 | ||
1900 | /* Set up cloned argument trees for the thunk. */ | |
1901 | tree t = NULL_TREE; | |
1902 | for (tree a = DECL_ARGUMENTS (function); a; a = DECL_CHAIN (a)) | |
1903 | { | |
1904 | tree x = copy_node (a); | |
1905 | DECL_CHAIN (x) = t; | |
1906 | DECL_CONTEXT (x) = thunk; | |
1907 | SET_DECL_RTL (x, NULL); | |
1908 | DECL_HAS_VALUE_EXPR_P (x) = 0; | |
1909 | TREE_ADDRESSABLE (x) = 0; | |
1910 | t = x; | |
1911 | } | |
1912 | DECL_ARGUMENTS (thunk) = nreverse (t); | |
1913 | TREE_ASM_WRITTEN (thunk) = 1; | |
1914 | ||
1915 | cgraph_node *funcn, *thunk_node; | |
1916 | ||
1917 | funcn = cgraph_node::get_create (function); | |
1918 | gcc_assert (funcn); | |
1919 | thunk_node = funcn->create_thunk (thunk, thunk, this_adjusting, | |
1920 | fixed_offset, 0, 0, 0, alias); | |
1921 | ||
1922 | if (DECL_ONE_ONLY (function)) | |
1923 | thunk_node->add_to_same_comdat_group (funcn); | |
b4c522fa IB |
1924 | } |
1925 | ||
1926 | /* Return a thunk to DECL. Thunks adjust the incoming `this' pointer by OFFSET. | |
1927 | Adjustor thunks are created and pointers to them stored in the method entries | |
1928 | in the vtable in order to set the this pointer to the start of the object | |
1929 | instance corresponding to the implementing method. */ | |
1930 | ||
1931 | tree | |
1932 | make_thunk (FuncDeclaration *decl, int offset) | |
1933 | { | |
1934 | tree function = get_symbol_decl (decl); | |
1935 | ||
1936 | if (!DECL_ARGUMENTS (function) || !DECL_RESULT (function)) | |
1937 | { | |
d1bddcaf IB |
1938 | /* Build parameters for functions that are not being compiled, |
1939 | so that they can be correctly cloned in finish_thunk. */ | |
1940 | tree function = get_symbol_decl (decl); | |
1941 | DECL_ARGUMENTS (function) = get_fndecl_arguments (decl); | |
1942 | ||
1943 | /* Also build the result decl, which is needed when force creating | |
1944 | the thunk in gimple inside cgraph_node::expand_thunk. */ | |
1945 | DECL_RESULT (function) = get_fndecl_result (decl); | |
b4c522fa IB |
1946 | } |
1947 | ||
1948 | /* Don't build the thunk if the compilation step failed. */ | |
1949 | if (global.errors) | |
1950 | return error_mark_node; | |
1951 | ||
1952 | /* See if we already have the thunk in question. */ | |
1953 | for (tree t = DECL_LANG_THUNKS (function); t; t = DECL_CHAIN (t)) | |
1954 | { | |
1955 | if (THUNK_LANG_OFFSET (t) == offset) | |
1956 | return t; | |
1957 | } | |
1958 | ||
1959 | tree thunk = build_decl (DECL_SOURCE_LOCATION (function), | |
1960 | FUNCTION_DECL, NULL_TREE, TREE_TYPE (function)); | |
1961 | DECL_LANG_SPECIFIC (thunk) = DECL_LANG_SPECIFIC (function); | |
1962 | lang_hooks.dup_lang_specific_decl (thunk); | |
1963 | THUNK_LANG_OFFSET (thunk) = offset; | |
1964 | ||
1965 | TREE_READONLY (thunk) = TREE_READONLY (function); | |
1966 | TREE_THIS_VOLATILE (thunk) = TREE_THIS_VOLATILE (function); | |
1967 | TREE_NOTHROW (thunk) = TREE_NOTHROW (function); | |
1968 | ||
1969 | DECL_CONTEXT (thunk) = d_decl_context (decl); | |
1970 | ||
d1bddcaf | 1971 | /* Thunks inherit the public access of the function they are targeting. */ |
5d4b824f | 1972 | TREE_PUBLIC (thunk) = TREE_PUBLIC (function); |
d1bddcaf IB |
1973 | /* The thunk has not been defined -- yet. */ |
1974 | DECL_EXTERNAL (thunk) = 1; | |
b4c522fa IB |
1975 | |
1976 | /* Thunks are always addressable. */ | |
1977 | TREE_ADDRESSABLE (thunk) = 1; | |
1978 | TREE_USED (thunk) = 1; | |
1979 | DECL_ARTIFICIAL (thunk) = 1; | |
1980 | DECL_DECLARED_INLINE_P (thunk) = 0; | |
1981 | ||
e22b7ae1 IB |
1982 | if (TREE_PUBLIC (thunk)) |
1983 | { | |
1984 | DECL_VISIBILITY (thunk) = DECL_VISIBILITY (function); | |
1985 | DECL_COMDAT (thunk) = DECL_COMDAT (function); | |
1986 | DECL_WEAK (thunk) = DECL_WEAK (function); | |
1987 | } | |
b4c522fa | 1988 | |
5d4b824f IB |
1989 | /* When the thunk is for an extern C++ function, let C++ do the thunk |
1990 | generation and just reference the symbol as extern, instead of | |
1991 | forcing a D local thunk to be emitted. */ | |
1992 | const char *ident; | |
1993 | ||
5eb9927a | 1994 | if (decl->resolvedLinkage () == LINK::cpp) |
5d4b824f IB |
1995 | ident = target.cpp.thunkMangle (decl, offset); |
1996 | else | |
1997 | { | |
1998 | tree target_name = DECL_ASSEMBLER_NAME (function); | |
1999 | unsigned identlen = IDENTIFIER_LENGTH (target_name) + 14; | |
2000 | ident = XNEWVEC (const char, identlen); | |
2001 | ||
2002 | snprintf (CONST_CAST (char *, ident), identlen, | |
2003 | "_DTi%u%s", offset, IDENTIFIER_POINTER (target_name)); | |
2004 | } | |
b4c522fa IB |
2005 | |
2006 | DECL_NAME (thunk) = get_identifier (ident); | |
2007 | SET_DECL_ASSEMBLER_NAME (thunk, DECL_NAME (thunk)); | |
2008 | ||
2009 | d_keep (thunk); | |
5fee5ec3 | 2010 | |
5eb9927a | 2011 | if (decl->resolvedLinkage () != LINK::cpp) |
5fee5ec3 | 2012 | free (CONST_CAST (char *, ident)); |
b4c522fa | 2013 | |
d1bddcaf IB |
2014 | /* Thunks are connected to the definitions of the functions, so thunks are |
2015 | not produced for external functions. */ | |
5d4b824f IB |
2016 | if (!DECL_EXTERNAL (function)) |
2017 | finish_thunk (thunk, function); | |
b4c522fa IB |
2018 | |
2019 | /* Add it to the list of thunks associated with the function. */ | |
2020 | DECL_LANG_THUNKS (thunk) = NULL_TREE; | |
2021 | DECL_CHAIN (thunk) = DECL_LANG_THUNKS (function); | |
2022 | DECL_LANG_THUNKS (function) = thunk; | |
2023 | ||
2024 | return thunk; | |
2025 | } | |
2026 | ||
2027 | /* Create the FUNCTION_DECL for a function definition. | |
2028 | This function creates a binding context for the function body | |
2029 | as well as setting up the FUNCTION_DECL in current_function_decl. | |
2030 | Returns the previous function context if it was already set. */ | |
2031 | ||
2032 | tree | |
2033 | start_function (FuncDeclaration *fd) | |
2034 | { | |
2035 | tree fndecl = get_symbol_decl (fd); | |
2036 | ||
423d34f6 IB |
2037 | /* Function has been defined. Whether we intend to send it to object file, or |
2038 | discard it has already been determined by set_linkage_for_decl. */ | |
2039 | DECL_EXTERNAL (fndecl) = 0; | |
b4c522fa IB |
2040 | DECL_INITIAL (fndecl) = error_mark_node; |
2041 | ||
2042 | /* Add this decl to the current binding level. */ | |
2043 | d_pushdecl (fndecl); | |
2044 | ||
2045 | /* Save the current function context. */ | |
2046 | tree old_context = current_function_decl; | |
2047 | ||
2048 | if (old_context) | |
2049 | push_function_context (); | |
2050 | ||
2051 | /* Let GCC know the current scope is this function. */ | |
2052 | current_function_decl = fndecl; | |
2053 | ||
499b0770 IB |
2054 | /* Build the result decl before calling allocate_struct_function. */ |
2055 | DECL_RESULT (fndecl) = get_fndecl_result (fd); | |
b4c522fa IB |
2056 | |
2057 | /* Initialize the RTL code for the function. */ | |
2058 | allocate_struct_function (fndecl, false); | |
2059 | ||
2060 | /* Store the end of the function. */ | |
2061 | if (fd->endloc.filename) | |
2062 | cfun->function_end_locus = make_location_t (fd->endloc); | |
2063 | else | |
2064 | cfun->function_end_locus = DECL_SOURCE_LOCATION (fndecl); | |
2065 | ||
af3c19f0 | 2066 | cfun->language = ggc_cleared_alloc <language_function> (); |
b4c522fa IB |
2067 | cfun->language->function = fd; |
2068 | ||
cdbf48be | 2069 | /* Default chain value is `null' unless parent found. */ |
b4c522fa IB |
2070 | cfun->language->static_chain = null_pointer_node; |
2071 | ||
2072 | /* Find module for this function. */ | |
2073 | for (Dsymbol *p = fd->parent; p != NULL; p = p->parent) | |
2074 | { | |
2075 | cfun->language->module = p->isModule (); | |
2076 | if (cfun->language->module) | |
2077 | break; | |
2078 | } | |
2079 | gcc_assert (cfun->language->module != NULL); | |
2080 | ||
2081 | /* Begin the statement tree for this function. */ | |
2082 | push_stmt_list (); | |
2083 | push_binding_level (level_function); | |
2084 | ||
2085 | return old_context; | |
2086 | } | |
2087 | ||
2088 | /* Finish up a function declaration and compile that function all | |
2089 | the way to assembler language output. The free the storage for | |
2090 | the function definition. Restores the previous function context. */ | |
2091 | ||
2092 | void | |
2093 | finish_function (tree old_context) | |
2094 | { | |
2095 | tree fndecl = current_function_decl; | |
2096 | ||
2097 | /* Tie off the statement tree for this function. */ | |
2098 | tree block = pop_binding_level (); | |
2099 | tree body = pop_stmt_list (); | |
2100 | tree bind = build3 (BIND_EXPR, void_type_node, | |
2101 | BLOCK_VARS (block), body, block); | |
2102 | ||
2103 | gcc_assert (vec_safe_is_empty (d_function_chain->stmt_list)); | |
2104 | ||
2105 | /* Back-end expects a statement list to come from somewhere, however | |
2106 | pop_stmt_list returns expressions when there is a single statement. | |
2107 | So here we create a statement list unconditionally. */ | |
2108 | if (TREE_CODE (body) != STATEMENT_LIST) | |
2109 | { | |
2110 | tree stmtlist = alloc_stmt_list (); | |
2111 | append_to_statement_list_force (body, &stmtlist); | |
2112 | BIND_EXPR_BODY (bind) = stmtlist; | |
2113 | } | |
2114 | else if (!STATEMENT_LIST_HEAD (body)) | |
2115 | { | |
2116 | /* For empty functions add a void return. */ | |
2117 | append_to_statement_list_force (return_expr (NULL_TREE), &body); | |
2118 | } | |
2119 | ||
2120 | DECL_SAVED_TREE (fndecl) = bind; | |
2121 | ||
d1bddcaf IB |
2122 | /* Finish any forward referenced thunks for the function. */ |
2123 | for (tree t = DECL_LANG_THUNKS (fndecl); t; t = DECL_CHAIN (t)) | |
2124 | finish_thunk (t, fndecl); | |
2125 | ||
b4c522fa IB |
2126 | if (!errorcount && !global.errors) |
2127 | { | |
2128 | /* Dump the D-specific tree IR. */ | |
2129 | dump_function (TDI_original, fndecl); | |
2130 | ||
2131 | cgraph_node::finalize_function (fndecl, true); | |
2132 | } | |
2133 | ||
2134 | /* We're leaving the context of this function, so free it. */ | |
2135 | ggc_free (cfun->language); | |
2136 | cfun->language = NULL; | |
2137 | set_cfun (NULL); | |
2138 | ||
2139 | if (old_context) | |
2140 | pop_function_context (); | |
2141 | ||
2142 | current_function_decl = old_context; | |
2143 | } | |
2144 | ||
2145 | /* Mark DECL, which is a VAR_DECL or FUNCTION_DECL as a symbol that | |
2146 | must be emitted in this, output module. */ | |
2147 | ||
bda51959 IB |
2148 | static void |
2149 | d_mark_needed (tree decl) | |
b4c522fa IB |
2150 | { |
2151 | TREE_USED (decl) = 1; | |
2152 | ||
2153 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
2154 | { | |
2155 | struct cgraph_node *node = cgraph_node::get_create (decl); | |
2156 | node->forced_by_abi = true; | |
2157 | } | |
2158 | else if (VAR_P (decl)) | |
2159 | { | |
2160 | struct varpool_node *node = varpool_node::get_create (decl); | |
2161 | node->forced_by_abi = true; | |
2162 | } | |
2163 | } | |
2164 | ||
b4c522fa IB |
2165 | /* Get the VAR_DECL of the vtable symbol for DECL. If this does not yet exist, |
2166 | create it. The vtable is accessible via ClassInfo, but since it is needed | |
2167 | frequently (like for rtti comparisons), make it directly accessible. */ | |
2168 | ||
2169 | tree | |
2170 | get_vtable_decl (ClassDeclaration *decl) | |
2171 | { | |
5fee5ec3 IB |
2172 | if (decl->vtblsym && decl->vtblsym->csym) |
2173 | return decl->vtblsym->csym; | |
b4c522fa IB |
2174 | |
2175 | tree ident = mangle_internal_decl (decl, "__vtbl", "Z"); | |
2176 | /* Note: Using a static array type for the VAR_DECL, the DECL_INITIAL value | |
2177 | will have a different type. However the back-end seems to accept this. */ | |
2cbc99d1 | 2178 | tree type = build_ctype (Type::tvoidptr->sarrayOf (decl->vtbl.length)); |
b4c522fa | 2179 | |
5fee5ec3 IB |
2180 | Dsymbol *vtblsym = decl->vtblSymbol (); |
2181 | vtblsym->csym = declare_extern_var (ident, type); | |
2182 | DECL_LANG_SPECIFIC (vtblsym->csym) = build_lang_decl (NULL); | |
b4c522fa IB |
2183 | |
2184 | /* Class is a reference, want the record type. */ | |
5fee5ec3 IB |
2185 | DECL_CONTEXT (vtblsym->csym) = TREE_TYPE (build_ctype (decl->type)); |
2186 | TREE_READONLY (vtblsym->csym) = 1; | |
2187 | DECL_VIRTUAL_P (vtblsym->csym) = 1; | |
b4c522fa | 2188 | |
5fee5ec3 IB |
2189 | SET_DECL_ALIGN (vtblsym->csym, TARGET_VTABLE_ENTRY_ALIGN); |
2190 | DECL_USER_ALIGN (vtblsym->csym) = true; | |
b4c522fa | 2191 | |
5fee5ec3 | 2192 | return vtblsym->csym; |
b4c522fa IB |
2193 | } |
2194 | ||
2195 | /* Helper function of build_class_instance. Find the field inside aggregate | |
2196 | TYPE identified by IDENT at field OFFSET. */ | |
2197 | ||
2198 | static tree | |
2199 | find_aggregate_field (tree type, tree ident, tree offset) | |
2200 | { | |
2201 | tree fields = TYPE_FIELDS (type); | |
2202 | ||
2203 | for (tree field = fields; field != NULL_TREE; field = TREE_CHAIN (field)) | |
2204 | { | |
2205 | if (DECL_NAME (field) == NULL_TREE | |
2206 | && RECORD_OR_UNION_TYPE_P (TREE_TYPE (field)) | |
2207 | && ANON_AGGR_TYPE_P (TREE_TYPE (field))) | |
2208 | { | |
2209 | /* Search nesting anonymous structs and unions. */ | |
2210 | tree vfield = find_aggregate_field (TREE_TYPE (field), | |
2211 | ident, offset); | |
2212 | if (vfield != NULL_TREE) | |
2213 | return vfield; | |
2214 | } | |
2215 | else if (DECL_NAME (field) == ident | |
2216 | && (offset == NULL_TREE | |
2217 | || DECL_FIELD_OFFSET (field) == offset)) | |
2218 | { | |
2219 | /* Found matching field at offset. */ | |
2220 | return field; | |
2221 | } | |
2222 | } | |
2223 | ||
2224 | return NULL_TREE; | |
2225 | } | |
2226 | ||
2227 | /* Helper function of build_new_class_expr. Return a constructor that matches | |
2228 | the layout of the class expression EXP. */ | |
2229 | ||
2230 | static tree | |
2231 | build_class_instance (ClassReferenceExp *exp) | |
2232 | { | |
2233 | ClassDeclaration *cd = exp->originalClass (); | |
2234 | tree type = TREE_TYPE (build_ctype (exp->value->stype)); | |
af3c19f0 | 2235 | vec <constructor_elt, va_gc> *ve = NULL; |
b4c522fa IB |
2236 | |
2237 | /* The set base vtable field. */ | |
2238 | tree vptr = build_address (get_vtable_decl (cd)); | |
2239 | CONSTRUCTOR_APPEND_ELT (ve, TYPE_FIELDS (type), vptr); | |
2240 | ||
2241 | /* Go through the inheritance graph from top to bottom. This will add all | |
2242 | values to the constructor out of order, however build_struct_literal | |
2243 | will re-order all values before returning the finished literal. */ | |
2244 | for (ClassDeclaration *bcd = cd; bcd != NULL; bcd = bcd->baseClass) | |
2245 | { | |
2246 | /* Anonymous vtable interface fields are laid out before the fields of | |
2247 | each class. The interface offset is used to determine where to put | |
2248 | the classinfo offset reference. */ | |
2cbc99d1 | 2249 | for (size_t i = 0; i < bcd->vtblInterfaces->length; i++) |
b4c522fa IB |
2250 | { |
2251 | BaseClass *bc = (*bcd->vtblInterfaces)[i]; | |
2252 | ||
2253 | for (ClassDeclaration *cd2 = cd; 1; cd2 = cd2->baseClass) | |
2254 | { | |
2255 | gcc_assert (cd2 != NULL); | |
2256 | ||
2257 | unsigned csymoffset = base_vtable_offset (cd2, bc); | |
2258 | /* If the base class vtable was found. */ | |
2259 | if (csymoffset != ~0u) | |
2260 | { | |
2261 | tree csym = build_address (get_classinfo_decl (cd2)); | |
2262 | csym = build_offset (csym, size_int (csymoffset)); | |
2263 | ||
2264 | tree field = find_aggregate_field (type, NULL_TREE, | |
2265 | size_int (bc->offset)); | |
2266 | gcc_assert (field != NULL_TREE); | |
2267 | ||
2268 | CONSTRUCTOR_APPEND_ELT (ve, field, csym); | |
2269 | break; | |
2270 | } | |
2271 | } | |
2272 | } | |
2273 | ||
2274 | /* Generate initial values of all fields owned by current class. | |
2275 | Use both the name and offset to find the right field. */ | |
2cbc99d1 | 2276 | for (size_t i = 0; i < bcd->fields.length; i++) |
b4c522fa IB |
2277 | { |
2278 | VarDeclaration *vfield = bcd->fields[i]; | |
2279 | int index = exp->findFieldIndexByName (vfield); | |
2280 | gcc_assert (index != -1); | |
2281 | ||
2282 | Expression *value = (*exp->value->elements)[index]; | |
2283 | if (!value) | |
2284 | continue; | |
2285 | ||
2286 | /* Use find_aggregate_field to get the overridden field decl, | |
2287 | instead of the field associated with the base class. */ | |
2288 | tree field = get_symbol_decl (bcd->fields[i]); | |
2289 | field = find_aggregate_field (type, DECL_NAME (field), | |
2290 | DECL_FIELD_OFFSET (field)); | |
2291 | gcc_assert (field != NULL_TREE); | |
2292 | ||
2293 | CONSTRUCTOR_APPEND_ELT (ve, field, build_expr (value, true)); | |
2294 | } | |
2295 | } | |
2296 | ||
2297 | return build_struct_literal (type, ve); | |
2298 | } | |
2299 | ||
2300 | /* Get the VAR_DECL of a class instance representing EXPR as static data. | |
2301 | If this does not yet exist, create it. This is used to support initializing | |
2302 | a static variable that is of a class type using values known during CTFE. | |
2303 | In user code, it is analogous to the following code snippet. | |
2304 | ||
2305 | enum E = new C(1, 2, 3); | |
2306 | ||
2307 | That we write the contents of `C(1, 2, 3)' to static data is only a compiler | |
2308 | implementation detail. The initialization of these symbols could be done at | |
2309 | run-time using during as part of the module initialization or shared static | |
2310 | constructors phase of run-time start-up - whichever comes after `gc_init()'. | |
2311 | And infact that would be the better thing to do here eventually. */ | |
2312 | ||
2313 | tree | |
2314 | build_new_class_expr (ClassReferenceExp *expr) | |
2315 | { | |
2316 | if (expr->value->sym) | |
2317 | return expr->value->sym; | |
2318 | ||
2319 | /* Build the reference symbol. */ | |
2320 | tree type = build_ctype (expr->value->stype); | |
2321 | expr->value->sym = build_artificial_decl (TREE_TYPE (type), NULL_TREE, "C"); | |
2322 | ||
2323 | DECL_INITIAL (expr->value->sym) = build_class_instance (expr); | |
2324 | d_pushdecl (expr->value->sym); | |
2325 | rest_of_decl_compilation (expr->value->sym, 1, 0); | |
2326 | ||
2327 | return expr->value->sym; | |
2328 | } | |
2329 | ||
2330 | /* Get the VAR_DECL of the static initializer symbol for the struct/class DECL. | |
2331 | If this does not yet exist, create it. The static initializer data is | |
cdbf48be | 2332 | accessible via TypeInfo, and is also used in `new class' and default |
b4c522fa IB |
2333 | initializing struct literals. */ |
2334 | ||
2335 | tree | |
2336 | aggregate_initializer_decl (AggregateDeclaration *decl) | |
2337 | { | |
2338 | if (decl->sinit) | |
99d6d3d9 | 2339 | return (tree) decl->sinit; |
b4c522fa IB |
2340 | |
2341 | /* Class is a reference, want the record type. */ | |
2342 | tree type = build_ctype (decl->type); | |
2343 | StructDeclaration *sd = decl->isStructDeclaration (); | |
2344 | if (!sd) | |
2345 | type = TREE_TYPE (type); | |
2346 | ||
2347 | tree ident = mangle_internal_decl (decl, "__init", "Z"); | |
2348 | ||
99d6d3d9 IB |
2349 | tree sinit = declare_extern_var (ident, type); |
2350 | DECL_LANG_SPECIFIC (sinit) = build_lang_decl (NULL); | |
b4c522fa | 2351 | |
99d6d3d9 IB |
2352 | DECL_CONTEXT (sinit) = type; |
2353 | TREE_READONLY (sinit) = 1; | |
b4c522fa IB |
2354 | |
2355 | /* Honor struct alignment set by user. */ | |
0fb57034 | 2356 | if (sd && !sd->alignment.isDefault ()) |
b4c522fa | 2357 | { |
0fb57034 | 2358 | SET_DECL_ALIGN (sinit, sd->alignment.get () * BITS_PER_UNIT); |
99d6d3d9 | 2359 | DECL_USER_ALIGN (sinit) = true; |
b4c522fa IB |
2360 | } |
2361 | ||
99d6d3d9 IB |
2362 | decl->sinit = sinit; |
2363 | return sinit; | |
b4c522fa IB |
2364 | } |
2365 | ||
2366 | /* Generate the data for the static initializer. */ | |
2367 | ||
2368 | tree | |
2369 | layout_class_initializer (ClassDeclaration *cd) | |
2370 | { | |
6384eff5 | 2371 | NewExp *ne = NewExp::create (cd->loc, NULL, cd->type, NULL); |
b4c522fa IB |
2372 | ne->type = cd->type; |
2373 | ||
2374 | Expression *e = ne->ctfeInterpret (); | |
9c7d5e88 | 2375 | gcc_assert (e->op == EXP::classReference); |
b4c522fa | 2376 | |
d873350a | 2377 | return build_class_instance (e->isClassReferenceExp ()); |
b4c522fa IB |
2378 | } |
2379 | ||
2380 | tree | |
2381 | layout_struct_initializer (StructDeclaration *sd) | |
2382 | { | |
2383 | StructLiteralExp *sle = StructLiteralExp::create (sd->loc, sd, NULL); | |
2384 | ||
c8dfa79c | 2385 | if (!sd->fill (sd->loc, *sle->elements, true)) |
b4c522fa IB |
2386 | gcc_unreachable (); |
2387 | ||
2388 | sle->type = sd->type; | |
2389 | return build_expr (sle, true); | |
2390 | } | |
2391 | ||
2392 | /* Get the VAR_DECL of the static initializer symbol for the enum DECL. | |
2393 | If this does not yet exist, create it. The static initializer data is | |
2394 | accessible via TypeInfo_Enum, but the field member type is a byte[] that | |
2395 | requires a pointer to a symbol reference. */ | |
2396 | ||
2397 | tree | |
2398 | enum_initializer_decl (EnumDeclaration *decl) | |
2399 | { | |
2400 | if (decl->sinit) | |
2401 | return decl->sinit; | |
2402 | ||
370f66b6 | 2403 | gcc_assert (decl->ident); |
b4c522fa | 2404 | |
370f66b6 | 2405 | tree type = build_ctype (decl->type); |
b4c522fa | 2406 | tree ident = mangle_internal_decl (decl, "__init", "Z"); |
b4c522fa IB |
2407 | |
2408 | decl->sinit = declare_extern_var (ident, type); | |
2409 | DECL_LANG_SPECIFIC (decl->sinit) = build_lang_decl (NULL); | |
2410 | ||
2411 | DECL_CONTEXT (decl->sinit) = d_decl_context (decl); | |
2412 | TREE_READONLY (decl->sinit) = 1; | |
2413 | ||
2414 | return decl->sinit; | |
2415 | } | |
2416 | ||
2417 | /* Return an anonymous static variable of type TYPE, initialized with INIT, | |
2418 | and optionally prefixing the name with PREFIX. */ | |
2419 | ||
2420 | tree | |
2421 | build_artificial_decl (tree type, tree init, const char *prefix) | |
2422 | { | |
2423 | tree decl = build_decl (UNKNOWN_LOCATION, VAR_DECL, NULL_TREE, type); | |
2424 | const char *name = prefix ? prefix : "___s"; | |
2425 | char *label; | |
2426 | ||
2427 | ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl)); | |
2428 | SET_DECL_ASSEMBLER_NAME (decl, get_identifier (label)); | |
2429 | DECL_NAME (decl) = DECL_ASSEMBLER_NAME (decl); | |
2430 | ||
2431 | TREE_PUBLIC (decl) = 0; | |
2432 | TREE_STATIC (decl) = 1; | |
2433 | TREE_USED (decl) = 1; | |
2434 | DECL_IGNORED_P (decl) = 1; | |
2435 | DECL_ARTIFICIAL (decl) = 1; | |
2436 | ||
2437 | /* Perhaps at some point the initializer constant should be hashed | |
2438 | to remove duplicates. */ | |
2439 | DECL_INITIAL (decl) = init; | |
2440 | ||
2441 | return decl; | |
2442 | } | |
2443 | ||
2444 | /* Build TYPE_DECL for the declaration DSYM. */ | |
2445 | ||
2446 | void | |
2447 | build_type_decl (tree type, Dsymbol *dsym) | |
2448 | { | |
2449 | if (TYPE_STUB_DECL (type)) | |
2450 | return; | |
2451 | ||
9dddefef IB |
2452 | /* If a templated type, use the template instance name, as that includes all |
2453 | template parameters. */ | |
2454 | const char *name = dsym->parent->isTemplateInstance () | |
2455 | ? ((TemplateInstance *) dsym->parent)->toChars () : dsym->ident->toChars (); | |
2456 | ||
b4c522fa | 2457 | tree decl = build_decl (make_location_t (dsym->loc), TYPE_DECL, |
9dddefef | 2458 | get_identifier (name), type); |
b5446d0c | 2459 | SET_DECL_ASSEMBLER_NAME (decl, get_identifier (d_mangle_decl (dsym))); |
b4c522fa | 2460 | TREE_PUBLIC (decl) = 1; |
b4c522fa IB |
2461 | DECL_CONTEXT (decl) = d_decl_context (dsym); |
2462 | ||
2463 | TYPE_CONTEXT (type) = DECL_CONTEXT (decl); | |
2464 | TYPE_NAME (type) = decl; | |
2465 | ||
2466 | /* Not sure if there is a need for separate TYPE_DECLs in | |
2467 | TYPE_NAME and TYPE_STUB_DECL. */ | |
2468 | if (TREE_CODE (type) == ENUMERAL_TYPE || RECORD_OR_UNION_TYPE_P (type)) | |
e4011c13 IB |
2469 | { |
2470 | DECL_ARTIFICIAL (decl) = 1; | |
2471 | TYPE_STUB_DECL (type) = decl; | |
2472 | } | |
2473 | else if (type != TYPE_MAIN_VARIANT (type)) | |
2474 | DECL_ORIGINAL_TYPE (decl) = TYPE_MAIN_VARIANT (type); | |
b4c522fa IB |
2475 | } |
2476 | ||
2477 | /* Create a declaration for field NAME of a given TYPE, setting the flags | |
2478 | for whether the field is ARTIFICIAL and/or IGNORED. */ | |
2479 | ||
2480 | tree | |
2481 | create_field_decl (tree type, const char *name, int artificial, int ignored) | |
2482 | { | |
2483 | tree decl = build_decl (input_location, FIELD_DECL, | |
2484 | name ? get_identifier (name) : NULL_TREE, type); | |
2485 | DECL_ARTIFICIAL (decl) = artificial; | |
2486 | DECL_IGNORED_P (decl) = ignored; | |
2487 | ||
2488 | return decl; | |
2489 | } | |
2490 | ||
2491 | /* Return the COMDAT group into which DECL should be placed. */ | |
2492 | ||
2493 | static tree | |
2494 | d_comdat_group (tree decl) | |
2495 | { | |
2496 | /* If already part of a comdat group, use that. */ | |
2497 | if (DECL_COMDAT_GROUP (decl)) | |
2498 | return DECL_COMDAT_GROUP (decl); | |
2499 | ||
2500 | return DECL_ASSEMBLER_NAME (decl); | |
2501 | } | |
2502 | ||
2503 | /* Set DECL up to have the closest approximation of "initialized common" | |
2504 | linkage available. */ | |
2505 | ||
76a7e7e7 | 2506 | static void |
b4c522fa IB |
2507 | d_comdat_linkage (tree decl) |
2508 | { | |
76a7e7e7 IB |
2509 | /* COMDAT definitions have to be public. */ |
2510 | gcc_assert (TREE_PUBLIC (decl)); | |
2511 | ||
2512 | if (supports_one_only ()) | |
b4c522fa | 2513 | make_decl_one_only (decl, d_comdat_group (decl)); |
76a7e7e7 | 2514 | else if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INSTANTIATED (decl)) |
b4c522fa IB |
2515 | || (VAR_P (decl) && DECL_ARTIFICIAL (decl))) |
2516 | /* We can just emit function and compiler-generated variables statically; | |
2517 | having multiple copies is (for the most part) only a waste of space. */ | |
2518 | TREE_PUBLIC (decl) = 0; | |
2519 | else if (DECL_INITIAL (decl) == NULL_TREE | |
2520 | || DECL_INITIAL (decl) == error_mark_node) | |
2521 | /* Fallback, cannot have multiple copies. */ | |
2522 | DECL_COMMON (decl) = 1; | |
2523 | ||
76a7e7e7 | 2524 | if (TREE_PUBLIC (decl) && DECL_INSTANTIATED (decl)) |
b4c522fa IB |
2525 | DECL_COMDAT (decl) = 1; |
2526 | } | |
2527 | ||
76a7e7e7 | 2528 | /* Set DECL up to have the closest approximation of "weak" linkage. */ |
b4c522fa | 2529 | |
76a7e7e7 IB |
2530 | static void |
2531 | d_weak_linkage (tree decl) | |
b4c522fa IB |
2532 | { |
2533 | /* Weak definitions have to be public. */ | |
76a7e7e7 IB |
2534 | gcc_assert (TREE_PUBLIC (decl)); |
2535 | ||
2536 | /* Allow comdat linkage to be forced with the flag `-fno-weak-templates'. */ | |
2537 | if (!flag_weak_templates || !TARGET_SUPPORTS_WEAK) | |
2538 | return d_comdat_linkage (decl); | |
2539 | ||
2540 | declare_weak (decl); | |
2541 | } | |
2542 | ||
2543 | /* DECL is a FUNCTION_DECL or a VAR_DECL with static storage. Set flags to | |
2544 | reflect the linkage that DECL will receive in the object file. */ | |
2545 | ||
2546 | void | |
2547 | set_linkage_for_decl (tree decl) | |
2548 | { | |
2549 | gcc_assert (VAR_OR_FUNCTION_DECL_P (decl) && TREE_STATIC (decl)); | |
2550 | ||
2551 | /* Non-public decls keep their internal linkage. */ | |
b4c522fa IB |
2552 | if (!TREE_PUBLIC (decl)) |
2553 | return; | |
2554 | ||
423d34f6 IB |
2555 | /* Function literals and functions declared as `pragma(inline, true)' can |
2556 | appear in multiple translation units. */ | |
2557 | if (TREE_CODE (decl) == FUNCTION_DECL | |
2558 | && (DECL_DECLARED_INLINE_P (decl) || DECL_LAMBDA_FUNCTION_P (decl))) | |
76a7e7e7 | 2559 | return d_comdat_linkage (decl); |
b4c522fa | 2560 | |
04284176 IB |
2561 | /* Don't need to give private or protected symbols a special linkage. */ |
2562 | if ((TREE_PRIVATE (decl) || TREE_PROTECTED (decl)) | |
2563 | && !DECL_INSTANTIATED (decl)) | |
2564 | return; | |
2565 | ||
bda51959 IB |
2566 | /* If all instantiations must go in COMDAT, give them that linkage. |
2567 | This also applies to other extern declarations, so that it is possible | |
2568 | for them to override template declarations. */ | |
2569 | if (targetdm.d_templates_always_comdat) | |
2570 | { | |
2571 | /* Make sure that instantiations are not removed. */ | |
2572 | if (flag_weak_templates && DECL_INSTANTIATED (decl)) | |
2573 | d_mark_needed (decl); | |
2574 | ||
2575 | return d_comdat_linkage (decl); | |
2576 | } | |
2577 | ||
76a7e7e7 IB |
2578 | /* Instantiated variables and functions need to be overridable by any other |
2579 | symbol with the same name, so give them weak linkage. */ | |
2580 | if (DECL_INSTANTIATED (decl)) | |
2581 | return d_weak_linkage (decl); | |
b4c522fa | 2582 | |
76a7e7e7 IB |
2583 | /* Compiler generated public symbols can appear in multiple contexts. */ |
2584 | if (DECL_ARTIFICIAL (decl)) | |
2585 | return d_weak_linkage (decl); | |
b4c522fa | 2586 | } |
636b01ab IB |
2587 | |
2588 | /* NODE is a FUNCTION_DECL, VAR_DECL or RECORD_TYPE for the declaration SYM. | |
2589 | Set flags to reflect visibility that NODE will get in the object file. */ | |
2590 | ||
2591 | void | |
2592 | set_visibility_for_decl (tree node, Dsymbol *sym) | |
2593 | { | |
2594 | Visibility visibility = sym->visible (); | |
2595 | if (visibility.kind == Visibility::private_) | |
2596 | TREE_PRIVATE (node) = 1; | |
2597 | else if (visibility.kind == Visibility::protected_) | |
2598 | TREE_PROTECTED (node) = 1; | |
2599 | ||
2600 | /* If the declaration was declared `export', append either the dllimport | |
2601 | or dllexport attribute. */ | |
2602 | if (TARGET_DLLIMPORT_DECL_ATTRIBUTES) | |
2603 | { | |
2604 | const char *attrname = NULL; | |
2605 | ||
2606 | /* Have to test for import first. */ | |
2607 | if (sym->isImportedSymbol ()) | |
2608 | attrname = "dllimport"; | |
2609 | else if (sym->isExport ()) | |
2610 | attrname = "dllexport"; | |
2611 | ||
2612 | if (attrname != NULL) | |
2613 | { | |
2614 | if (DECL_P (node)) | |
2615 | insert_decl_attribute (node, attrname); | |
2616 | else if (TYPE_P (node)) | |
2617 | insert_type_attribute (node, attrname); | |
2618 | } | |
2619 | } | |
2620 | } |