clang 8.0.0

CodeGenTypes.cpp
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1 //===--- CodeGenTypes.cpp - Type translation for LLVM CodeGen -------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This is the code that handles AST -> LLVM type lowering.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "CodeGenTypes.h"
15 #include "CGCXXABI.h"
16 #include "CGCall.h"
17 #include "CGOpenCLRuntime.h"
18 #include "CGRecordLayout.h"
19 #include "TargetInfo.h"
20 #include "clang/AST/ASTContext.h"
21 #include "clang/AST/DeclCXX.h"
22 #include "clang/AST/DeclObjC.h"
23 #include "clang/AST/Expr.h"
24 #include "clang/AST/RecordLayout.h"
25 #include "clang/CodeGen/CGFunctionInfo.h"
26 #include "llvm/IR/DataLayout.h"
27 #include "llvm/IR/DerivedTypes.h"
28 #include "llvm/IR/Module.h"
29 using namespace clang;
30 using namespace CodeGen;
31
32 CodeGenTypes::CodeGenTypes(CodeGenModule &cgm)
33 : CGM(cgm), Context(cgm.getContext()), TheModule(cgm.getModule()),
34 Target(cgm.getTarget()), TheCXXABI(cgm.getCXXABI()),
35 TheABIInfo(cgm.getTargetCodeGenInfo().getABIInfo()) {
36 SkippedLayout = false;
37 }
38
39 CodeGenTypes::~CodeGenTypes() {
40 llvm::DeleteContainerSeconds(CGRecordLayouts);
41
42 for (llvm::FoldingSet<CGFunctionInfo>::iterator
43 I = FunctionInfos.begin(), E = FunctionInfos.end(); I != E; )
44 delete &*I++;
45 }
46
47 const CodeGenOptions &CodeGenTypes::getCodeGenOpts() const {
48 return CGM.getCodeGenOpts();
49 }
50
51 void CodeGenTypes::addRecordTypeName(const RecordDecl *RD,
52 llvm::StructType *Ty,
53 StringRef suffix) {
54 SmallString<256> TypeName;
55 llvm::raw_svector_ostream OS(TypeName);
56 OS << RD->getKindName() << '.';
57
58 // Name the codegen type after the typedef name
59 // if there is no tag type name available
60 if (RD->getIdentifier()) {
61 // FIXME: We should not have to check for a null decl context here.
62 // Right now we do it because the implicit Obj-C decls don't have one.
63 if (RD->getDeclContext())
64 RD->printQualifiedName(OS);
65 else
66 RD->printName(OS);
67 } else if (const TypedefNameDecl *TDD = RD->getTypedefNameForAnonDecl()) {
68 // FIXME: We should not have to check for a null decl context here.
69 // Right now we do it because the implicit Obj-C decls don't have one.
70 if (TDD->getDeclContext())
71 TDD->printQualifiedName(OS);
72 else
73 TDD->printName(OS);
74 } else
75 OS << "anon";
76
77 if (!suffix.empty())
78 OS << suffix;
79
80 Ty->setName(OS.str());
81 }
82
83 /// ConvertTypeForMem - Convert type T into a llvm::Type. This differs from
84 /// ConvertType in that it is used to convert to the memory representation for
85 /// a type. For example, the scalar representation for _Bool is i1, but the
86 /// memory representation is usually i8 or i32, depending on the target.
87 llvm::Type *CodeGenTypes::ConvertTypeForMem(QualType T) {
88 llvm::Type *R = ConvertType(T);
89
90 // If this is a non-bool type, don't map it.
91 if (!R->isIntegerTy(1))
92 return R;
93
94 // Otherwise, return an integer of the target-specified size.
95 return llvm::IntegerType::get(getLLVMContext(),
96 (unsigned)Context.getTypeSize(T));
97 }
98
99
100 /// isRecordLayoutComplete - Return true if the specified type is already
101 /// completely laid out.
102 bool CodeGenTypes::isRecordLayoutComplete(const Type *Ty) const {
103 llvm::DenseMap<const Type*, llvm::StructType *>::const_iterator I =
104 RecordDeclTypes.find(Ty);
105 return I != RecordDeclTypes.end() && !I->second->isOpaque();
106 }
107
108 static bool
109 isSafeToConvert(QualType T, CodeGenTypes &CGT,
110 llvm::SmallPtrSet<const RecordDecl*, 16> &AlreadyChecked);
111
112
113 /// isSafeToConvert - Return true if it is safe to convert the specified record
114 /// decl to IR and lay it out, false if doing so would cause us to get into a
115 /// recursive compilation mess.
116 static bool
117 isSafeToConvert(const RecordDecl *RD, CodeGenTypes &CGT,
118 llvm::SmallPtrSet<const RecordDecl*, 16> &AlreadyChecked) {
119 // If we have already checked this type (maybe the same type is used by-value
120 // multiple times in multiple structure fields, don't check again.
121 if (!AlreadyChecked.insert(RD).second)
122 return true;
123
124 const Type *Key = CGT.getContext().getTagDeclType(RD).getTypePtr();
125
126 // If this type is already laid out, converting it is a noop.
127 if (CGT.isRecordLayoutComplete(Key)) return true;
128
129 // If this type is currently being laid out, we can't recursively compile it.
130 if (CGT.isRecordBeingLaidOut(Key))
131 return false;
132
133 // If this type would require laying out bases that are currently being laid
134 // out, don't do it. This includes virtual base classes which get laid out
135 // when a class is translated, even though they aren't embedded by-value into
136 // the class.
137 if (const CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) {
138 for (const auto &I : CRD->bases())
139 if (!isSafeToConvert(I.getType()->getAs<RecordType>()->getDecl(),
140 CGT, AlreadyChecked))
141 return false;
142 }
143
144 // If this type would require laying out members that are currently being laid
145 // out, don't do it.
146 for (const auto *I : RD->fields())
147 if (!isSafeToConvert(I->getType(), CGT, AlreadyChecked))
148 return false;
149
150 // If there are no problems, lets do it.
151 return true;
152 }
153
154 /// isSafeToConvert - Return true if it is safe to convert this field type,
155 /// which requires the structure elements contained by-value to all be
156 /// recursively safe to convert.
157 static bool
158 isSafeToConvert(QualType T, CodeGenTypes &CGT,
159 llvm::SmallPtrSet<const RecordDecl*, 16> &AlreadyChecked) {
160 // Strip off atomic type sugar.
161 if (const auto *AT = T->getAs<AtomicType>())
162 T = AT->getValueType();
163
164 // If this is a record, check it.
165 if (const auto *RT = T->getAs<RecordType>())
166 return isSafeToConvert(RT->getDecl(), CGT, AlreadyChecked);
167
168 // If this is an array, check the elements, which are embedded inline.
169 if (const auto *AT = CGT.getContext().getAsArrayType(T))
170 return isSafeToConvert(AT->getElementType(), CGT, AlreadyChecked);
171
172 // Otherwise, there is no concern about transforming this. We only care about
173 // things that are contained by-value in a structure that can have another
174 // structure as a member.
175 return true;
176 }
177
178
179 /// isSafeToConvert - Return true if it is safe to convert the specified record
180 /// decl to IR and lay it out, false if doing so would cause us to get into a
181 /// recursive compilation mess.
182 static bool isSafeToConvert(const RecordDecl *RD, CodeGenTypes &CGT) {
183 // If no structs are being laid out, we can certainly do this one.
184 if (CGT.noRecordsBeingLaidOut()) return true;
185
186 llvm::SmallPtrSet<const RecordDecl*, 16> AlreadyChecked;
187 return isSafeToConvert(RD, CGT, AlreadyChecked);
188 }
189
190 /// isFuncParamTypeConvertible - Return true if the specified type in a
191 /// function parameter or result position can be converted to an IR type at this
192 /// point. This boils down to being whether it is complete, as well as whether
193 /// we've temporarily deferred expanding the type because we're in a recursive
194 /// context.
195 bool CodeGenTypes::isFuncParamTypeConvertible(QualType Ty) {
196 // Some ABIs cannot have their member pointers represented in IR unless
197 // certain circumstances have been reached.
198 if (const auto *MPT = Ty->getAs<MemberPointerType>())
199 return getCXXABI().isMemberPointerConvertible(MPT);
200
201 // If this isn't a tagged type, we can convert it!
202 const TagType *TT = Ty->getAs<TagType>();
203 if (!TT) return true;
204
205 // Incomplete types cannot be converted.
206 if (TT->isIncompleteType())
207 return false;
208
209 // If this is an enum, then it is always safe to convert.
210 const RecordType *RT = dyn_cast<RecordType>(TT);
211 if (!RT) return true;
212
213 // Otherwise, we have to be careful. If it is a struct that we're in the
214 // process of expanding, then we can't convert the function type. That's ok
215 // though because we must be in a pointer context under the struct, so we can
216 // just convert it to a dummy type.
217 //
218 // We decide this by checking whether ConvertRecordDeclType returns us an
219 // opaque type for a struct that we know is defined.
220 return isSafeToConvert(RT->getDecl(), *this);
221 }
222
223
224 /// Code to verify a given function type is complete, i.e. the return type
225 /// and all of the parameter types are complete. Also check to see if we are in
226 /// a RS_StructPointer context, and if so whether any struct types have been
227 /// pended. If so, we don't want to ask the ABI lowering code to handle a type
228 /// that cannot be converted to an IR type.
229 bool CodeGenTypes::isFuncTypeConvertible(const FunctionType *FT) {
230 if (!isFuncParamTypeConvertible(FT->getReturnType()))
231 return false;
232
233 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT))
234 for (unsigned i = 0, e = FPT->getNumParams(); i != e; i++)
235 if (!isFuncParamTypeConvertible(FPT->getParamType(i)))
236 return false;
237
238 return true;
239 }
240
241 /// UpdateCompletedType - When we find the full definition for a TagDecl,
242 /// replace the 'opaque' type we previously made for it if applicable.
243 void CodeGenTypes::UpdateCompletedType(const TagDecl *TD) {
244 // If this is an enum being completed, then we flush all non-struct types from
245 // the cache. This allows function types and other things that may be derived
246 // from the enum to be recomputed.
247 if (const EnumDecl *ED = dyn_cast<EnumDecl>(TD)) {
248 // Only flush the cache if we've actually already converted this type.
249 if (TypeCache.count(ED->getTypeForDecl())) {
250 // Okay, we formed some types based on this. We speculated that the enum
251 // would be lowered to i32, so we only need to flush the cache if this
252 // didn't happen.
253 if (!ConvertType(ED->getIntegerType())->isIntegerTy(32))
254 TypeCache.clear();
255 }
256 // If necessary, provide the full definition of a type only used with a
257 // declaration so far.
258 if (CGDebugInfo *DI = CGM.getModuleDebugInfo())
259 DI->completeType(ED);
260 return;
261 }
262
263 // If we completed a RecordDecl that we previously used and converted to an
264 // anonymous type, then go ahead and complete it now.
265 const RecordDecl *RD = cast<RecordDecl>(TD);
266 if (RD->isDependentType()) return;
267
268 // Only complete it if we converted it already. If we haven't converted it
269 // yet, we'll just do it lazily.
270 if (RecordDeclTypes.count(Context.getTagDeclType(RD).getTypePtr()))
271 ConvertRecordDeclType(RD);
272
273 // If necessary, provide the full definition of a type only used with a
274 // declaration so far.
275 if (CGDebugInfo *DI = CGM.getModuleDebugInfo())
276 DI->completeType(RD);
277 }
278
279 void CodeGenTypes::RefreshTypeCacheForClass(const CXXRecordDecl *RD) {
280 QualType T = Context.getRecordType(RD);
281 T = Context.getCanonicalType(T);
282
283 const Type *Ty = T.getTypePtr();
284 if (RecordsWithOpaqueMemberPointers.count(Ty)) {
285 TypeCache.clear();
286 RecordsWithOpaqueMemberPointers.clear();
287 }
288 }
289
290 static llvm::Type *getTypeForFormat(llvm::LLVMContext &VMContext,
291 const llvm::fltSemantics &format,
292 bool UseNativeHalf = false) {
293 if (&format == &llvm::APFloat::IEEEhalf()) {
294 if (UseNativeHalf)
295 return llvm::Type::getHalfTy(VMContext);
296 else
297 return llvm::Type::getInt16Ty(VMContext);
298 }
299 if (&format == &llvm::APFloat::IEEEsingle())
300 return llvm::Type::getFloatTy(VMContext);
301 if (&format == &llvm::APFloat::IEEEdouble())
302 return llvm::Type::getDoubleTy(VMContext);
303 if (&format == &llvm::APFloat::IEEEquad())
304 return llvm::Type::getFP128Ty(VMContext);
305 if (&format == &llvm::APFloat::PPCDoubleDouble())
306 return llvm::Type::getPPC_FP128Ty(VMContext);
307 if (&format == &llvm::APFloat::x87DoubleExtended())
308 return llvm::Type::getX86_FP80Ty(VMContext);
309 llvm_unreachable("Unknown float format!");
310 }
311
312 llvm::Type *CodeGenTypes::ConvertFunctionType(QualType QFT,
313 const FunctionDecl *FD) {
314 assert(QFT.isCanonical());
315 const Type *Ty = QFT.getTypePtr();
316 const FunctionType *FT = cast<FunctionType>(QFT.getTypePtr());
317 // First, check whether we can build the full function type. If the
318 // function type depends on an incomplete type (e.g. a struct or enum), we
319 // cannot lower the function type.
320 if (!isFuncTypeConvertible(FT)) {
321 // This function's type depends on an incomplete tag type.
322
323 // Force conversion of all the relevant record types, to make sure
324 // we re-convert the FunctionType when appropriate.
325 if (const RecordType *RT = FT->getReturnType()->getAs<RecordType>())
326 ConvertRecordDeclType(RT->getDecl());
327 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT))
328 for (unsigned i = 0, e = FPT->getNumParams(); i != e; i++)
329 if (const RecordType *RT = FPT->getParamType(i)->getAs<RecordType>())
330 ConvertRecordDeclType(RT->getDecl());
331
332 SkippedLayout = true;
333
334 // Return a placeholder type.
335 return llvm::StructType::get(getLLVMContext());
336 }
337
338 // While we're converting the parameter types for a function, we don't want
339 // to recursively convert any pointed-to structs. Converting directly-used
340 // structs is ok though.
341 if (!RecordsBeingLaidOut.insert(Ty).second) {
342 SkippedLayout = true;
343 return llvm::StructType::get(getLLVMContext());
344 }
345
346 // The function type can be built; call the appropriate routines to
347 // build it.
348 const CGFunctionInfo *FI;
349 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) {
350 FI = &arrangeFreeFunctionType(
351 CanQual<FunctionProtoType>::CreateUnsafe(QualType(FPT, 0)), FD);
352 } else {
353 const FunctionNoProtoType *FNPT = cast<FunctionNoProtoType>(FT);
354 FI = &arrangeFreeFunctionType(
355 CanQual<FunctionNoProtoType>::CreateUnsafe(QualType(FNPT, 0)));
356 }
357
358 llvm::Type *ResultType = nullptr;
359 // If there is something higher level prodding our CGFunctionInfo, then
360 // don't recurse into it again.
361 if (FunctionsBeingProcessed.count(FI)) {
362
363 ResultType = llvm::StructType::get(getLLVMContext());
364 SkippedLayout = true;
365 } else {
366
367 // Otherwise, we're good to go, go ahead and convert it.
368 ResultType = GetFunctionType(*FI);
369 }
370
371 RecordsBeingLaidOut.erase(Ty);
372
373 if (SkippedLayout)
374 TypeCache.clear();
375
376 if (RecordsBeingLaidOut.empty())
377 while (!DeferredRecords.empty())
378 ConvertRecordDeclType(DeferredRecords.pop_back_val());
379 return ResultType;
380 }
381
382 /// ConvertType - Convert the specified type to its LLVM form.
383 llvm::Type *CodeGenTypes::ConvertType(QualType T) {
384 T = Context.getCanonicalType(T);
385
386 const Type *Ty = T.getTypePtr();
387
388 // RecordTypes are cached and processed specially.
389 if (const RecordType *RT = dyn_cast<RecordType>(Ty))
390 return ConvertRecordDeclType(RT->getDecl());
391
392 // See if type is already cached.
393 llvm::DenseMap<const Type *, llvm::Type *>::iterator TCI = TypeCache.find(Ty);
394 // If type is found in map then use it. Otherwise, convert type T.
395 if (TCI != TypeCache.end())
396 return TCI->second;
397
398 // If we don't have it in the cache, convert it now.
399 llvm::Type *ResultType = nullptr;
400 switch (Ty->getTypeClass()) {
401 case Type::Record: // Handled above.
402 #define TYPE(Class, Base)
403 #define ABSTRACT_TYPE(Class, Base)
404 #define NON_CANONICAL_TYPE(Class, Base) case Type::Class:
405 #define DEPENDENT_TYPE(Class, Base) case Type::Class:
406 #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class:
407 #include "clang/AST/TypeNodes.def"
408 llvm_unreachable("Non-canonical or dependent types aren't possible.");
409
410 case Type::Builtin: {
411 switch (cast<BuiltinType>(Ty)->getKind()) {
412 case BuiltinType::Void:
413 case BuiltinType::ObjCId:
414 case BuiltinType::ObjCClass:
415 case BuiltinType::ObjCSel:
416 // LLVM void type can only be used as the result of a function call. Just
417 // map to the same as char.
418 ResultType = llvm::Type::getInt8Ty(getLLVMContext());
419 break;
420
421 case BuiltinType::Bool:
422 // Note that we always return bool as i1 for use as a scalar type.
423 ResultType = llvm::Type::getInt1Ty(getLLVMContext());
424 break;
425
426 case BuiltinType::Char_S:
427 case BuiltinType::Char_U:
428 case BuiltinType::SChar:
429 case BuiltinType::UChar:
430 case BuiltinType::Short:
431 case BuiltinType::UShort:
432 case BuiltinType::Int:
433 case BuiltinType::UInt:
434 case BuiltinType::Long:
435 case BuiltinType::ULong:
436 case BuiltinType::LongLong:
437 case BuiltinType::ULongLong:
438 case BuiltinType::WChar_S:
439 case BuiltinType::WChar_U:
440 case BuiltinType::Char8:
441 case BuiltinType::Char16:
442 case BuiltinType::Char32:
443 case BuiltinType::ShortAccum:
444 case BuiltinType::Accum:
445 case BuiltinType::LongAccum:
446 case BuiltinType::UShortAccum:
447 case BuiltinType::UAccum:
448 case BuiltinType::ULongAccum:
449 case BuiltinType::ShortFract:
450 case BuiltinType::Fract:
451 case BuiltinType::LongFract:
452 case BuiltinType::UShortFract:
453 case BuiltinType::UFract:
454 case BuiltinType::ULongFract:
455 case BuiltinType::SatShortAccum:
456 case BuiltinType::SatAccum:
457 case BuiltinType::SatLongAccum:
458 case BuiltinType::SatUShortAccum:
459 case BuiltinType::SatUAccum:
460 case BuiltinType::SatULongAccum:
461 case BuiltinType::SatShortFract:
462 case BuiltinType::SatFract:
463 case BuiltinType::SatLongFract:
464 case BuiltinType::SatUShortFract:
465 case BuiltinType::SatUFract:
466 case BuiltinType::SatULongFract:
467 ResultType = llvm::IntegerType::get(getLLVMContext(),
468 static_cast<unsigned>(Context.getTypeSize(T)));
469 break;
470
471 case BuiltinType::Float16:
472 ResultType =
473 getTypeForFormat(getLLVMContext(), Context.getFloatTypeSemantics(T),
474 /* UseNativeHalf = */ true);
475 break;
476
477 case BuiltinType::Half:
478 // Half FP can either be storage-only (lowered to i16) or native.
479 ResultType = getTypeForFormat(
480 getLLVMContext(), Context.getFloatTypeSemantics(T),
481 Context.getLangOpts().NativeHalfType ||
482 !Context.getTargetInfo().useFP16ConversionIntrinsics());
483 break;
484 case BuiltinType::Float:
485 case BuiltinType::Double:
486 case BuiltinType::LongDouble:
487 case BuiltinType::Float128:
488 ResultType = getTypeForFormat(getLLVMContext(),
489 Context.getFloatTypeSemantics(T),
490 /* UseNativeHalf = */ false);
491 break;
492
493 case BuiltinType::NullPtr:
494 // Model std::nullptr_t as i8*
495 ResultType = llvm::Type::getInt8PtrTy(getLLVMContext());
496 break;
497
498 case BuiltinType::UInt128:
499 case BuiltinType::Int128:
500 ResultType = llvm::IntegerType::get(getLLVMContext(), 128);
501 break;
502
503 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
504 case BuiltinType::Id:
505 #include "clang/Basic/OpenCLImageTypes.def"
506 #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
507 case BuiltinType::Id:
508 #include "clang/Basic/OpenCLExtensionTypes.def"
509 case BuiltinType::OCLSampler:
510 case BuiltinType::OCLEvent:
511 case BuiltinType::OCLClkEvent:
512 case BuiltinType::OCLQueue:
513 case BuiltinType::OCLReserveID:
514 ResultType = CGM.getOpenCLRuntime().convertOpenCLSpecificType(Ty);
515 break;
516
517 case BuiltinType::Dependent:
518 #define BUILTIN_TYPE(Id, SingletonId)
519 #define PLACEHOLDER_TYPE(Id, SingletonId) \
520 case BuiltinType::Id:
521 #include "clang/AST/BuiltinTypes.def"
522 llvm_unreachable("Unexpected placeholder builtin type!");
523 }
524 break;
525 }
526 case Type::Auto:
527 case Type::DeducedTemplateSpecialization:
528 llvm_unreachable("Unexpected undeduced type!");
529 case Type::Complex: {
530 llvm::Type *EltTy = ConvertType(cast<ComplexType>(Ty)->getElementType());
531 ResultType = llvm::StructType::get(EltTy, EltTy);
532 break;
533 }
534 case Type::LValueReference:
535 case Type::RValueReference: {
536 const ReferenceType *RTy = cast<ReferenceType>(Ty);
537 QualType ETy = RTy->getPointeeType();
538 llvm::Type *PointeeType = ConvertTypeForMem(ETy);
539 unsigned AS = Context.getTargetAddressSpace(ETy);
540 ResultType = llvm::PointerType::get(PointeeType, AS);
541 break;
542 }
543 case Type::Pointer: {
544 const PointerType *PTy = cast<PointerType>(Ty);
545 QualType ETy = PTy->getPointeeType();
546 llvm::Type *PointeeType = ConvertTypeForMem(ETy);
547 if (PointeeType->isVoidTy())
548 PointeeType = llvm::Type::getInt8Ty(getLLVMContext());
549 unsigned AS = Context.getTargetAddressSpace(ETy);
550 ResultType = llvm::PointerType::get(PointeeType, AS);
551 break;
552 }
553
554 case Type::VariableArray: {
555 const VariableArrayType *A = cast<VariableArrayType>(Ty);
556 assert(A->getIndexTypeCVRQualifiers() == 0 &&
557 "FIXME: We only handle trivial array types so far!");
558 // VLAs resolve to the innermost element type; this matches
559 // the return of alloca, and there isn't any obviously better choice.
560 ResultType = ConvertTypeForMem(A->getElementType());
561 break;
562 }
563 case Type::IncompleteArray: {
564 const IncompleteArrayType *A = cast<IncompleteArrayType>(Ty);
565 assert(A->getIndexTypeCVRQualifiers() == 0 &&
566 "FIXME: We only handle trivial array types so far!");
567 // int X[] -> [0 x int], unless the element type is not sized. If it is
568 // unsized (e.g. an incomplete struct) just use [0 x i8].
569 ResultType = ConvertTypeForMem(A->getElementType());
570 if (!ResultType->isSized()) {
571 SkippedLayout = true;
572 ResultType = llvm::Type::getInt8Ty(getLLVMContext());
573 }
574 ResultType = llvm::ArrayType::get(ResultType, 0);
575 break;
576 }
577 case Type::ConstantArray: {
578 const ConstantArrayType *A = cast<ConstantArrayType>(Ty);
579 llvm::Type *EltTy = ConvertTypeForMem(A->getElementType());
580
581 // Lower arrays of undefined struct type to arrays of i8 just to have a
582 // concrete type.
583 if (!EltTy->isSized()) {
584 SkippedLayout = true;
585 EltTy = llvm::Type::getInt8Ty(getLLVMContext());
586 }
587
588 ResultType = llvm::ArrayType::get(EltTy, A->getSize().getZExtValue());
589 break;
590 }
591 case Type::ExtVector:
592 case Type::Vector: {
593 const VectorType *VT = cast<VectorType>(Ty);
594 ResultType = llvm::VectorType::get(ConvertType(VT->getElementType()),
595 VT->getNumElements());
596 break;
597 }
598 case Type::FunctionNoProto:
599 case Type::FunctionProto:
600 ResultType = ConvertFunctionType(T);
601 break;
602 case Type::ObjCObject:
603 ResultType = ConvertType(cast<ObjCObjectType>(Ty)->getBaseType());
604 break;
605
606 case Type::ObjCInterface: {
607 // Objective-C interfaces are always opaque (outside of the
608 // runtime, which can do whatever it likes); we never refine
609 // these.
610 llvm::Type *&T = InterfaceTypes[cast<ObjCInterfaceType>(Ty)];
611 if (!T)
612 T = llvm::StructType::create(getLLVMContext());
613 ResultType = T;
614 break;
615 }
616
617 case Type::ObjCObjectPointer: {
618 // Protocol qualifications do not influence the LLVM type, we just return a
619 // pointer to the underlying interface type. We don't need to worry about
620 // recursive conversion.
621 llvm::Type *T =
622 ConvertTypeForMem(cast<ObjCObjectPointerType>(Ty)->getPointeeType());
623 ResultType = T->getPointerTo();
624 break;
625 }
626
627 case Type::Enum: {
628 const EnumDecl *ED = cast<EnumType>(Ty)->getDecl();
629 if (ED->isCompleteDefinition() || ED->isFixed())
630 return ConvertType(ED->getIntegerType());
631 // Return a placeholder 'i32' type. This can be changed later when the
632 // type is defined (see UpdateCompletedType), but is likely to be the
633 // "right" answer.
634 ResultType = llvm::Type::getInt32Ty(getLLVMContext());
635 break;
636 }
637
638 case Type::BlockPointer: {
639 const QualType FTy = cast<BlockPointerType>(Ty)->getPointeeType();
640 llvm::Type *PointeeType = ConvertTypeForMem(FTy);
641 unsigned AS = Context.getTargetAddressSpace(FTy);
642 ResultType = llvm::PointerType::get(PointeeType, AS);
643 break;
644 }
645
646 case Type::MemberPointer: {
647 auto *MPTy = cast<MemberPointerType>(Ty);
648 if (!getCXXABI().isMemberPointerConvertible(MPTy)) {
649 RecordsWithOpaqueMemberPointers.insert(MPTy->getClass());
650 ResultType = llvm::StructType::create(getLLVMContext());
651 } else {
652 ResultType = getCXXABI().ConvertMemberPointerType(MPTy);
653 }
654 break;
655 }
656
657 case Type::Atomic: {
658 QualType valueType = cast<AtomicType>(Ty)->getValueType();
659 ResultType = ConvertTypeForMem(valueType);
660
661 // Pad out to the inflated size if necessary.
662 uint64_t valueSize = Context.getTypeSize(valueType);
663 uint64_t atomicSize = Context.getTypeSize(Ty);
664 if (valueSize != atomicSize) {
665 assert(valueSize < atomicSize);
666 llvm::Type *elts[] = {
667 ResultType,
668 llvm::ArrayType::get(CGM.Int8Ty, (atomicSize - valueSize) / 8)
669 };
670 ResultType = llvm::StructType::get(getLLVMContext(),
671 llvm::makeArrayRef(elts));
672 }
673 break;
674 }
675 case Type::Pipe: {
676 ResultType = CGM.getOpenCLRuntime().getPipeType(cast<PipeType>(Ty));
677 break;
678 }
679 }
680
681 assert(ResultType && "Didn't convert a type?");
682
683 TypeCache[Ty] = ResultType;
684 return ResultType;
685 }
686
687 bool CodeGenModule::isPaddedAtomicType(QualType type) {
688 return isPaddedAtomicType(type->castAs<AtomicType>());
689 }
690
691 bool CodeGenModule::isPaddedAtomicType(const AtomicType *type) {
692 return Context.getTypeSize(type) != Context.getTypeSize(type->getValueType());
693 }
694
695 /// ConvertRecordDeclType - Lay out a tagged decl type like struct or union.
696 llvm::StructType *CodeGenTypes::ConvertRecordDeclType(const RecordDecl *RD) {
697 // TagDecl's are not necessarily unique, instead use the (clang)
698 // type connected to the decl.
699 const Type *Key = Context.getTagDeclType(RD).getTypePtr();
700
701 llvm::StructType *&Entry = RecordDeclTypes[Key];
702
703 // If we don't have a StructType at all yet, create the forward declaration.
704 if (!Entry) {
705 Entry = llvm::StructType::create(getLLVMContext());
706 addRecordTypeName(RD, Entry, "");
707 }
708 llvm::StructType *Ty = Entry;
709
710 // If this is still a forward declaration, or the LLVM type is already
711 // complete, there's nothing more to do.
712 RD = RD->getDefinition();
713 if (!RD || !RD->isCompleteDefinition() || !Ty->isOpaque())
714 return Ty;
715
716 // If converting this type would cause us to infinitely loop, don't do it!
717 if (!isSafeToConvert(RD, *this)) {
718 DeferredRecords.push_back(RD);
719 return Ty;
720 }
721
722 // Okay, this is a definition of a type. Compile the implementation now.
723 bool InsertResult = RecordsBeingLaidOut.insert(Key).second;
724 (void)InsertResult;
725 assert(InsertResult && "Recursively compiling a struct?");
726
727 // Force conversion of non-virtual base classes recursively.
728 if (const CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) {
729 for (const auto &I : CRD->bases()) {
730 if (I.isVirtual()) continue;
731
732 ConvertRecordDeclType(I.getType()->getAs<RecordType>()->getDecl());
733 }
734 }
735
736 // Layout fields.
737 CGRecordLayout *Layout = ComputeRecordLayout(RD, Ty);
738 CGRecordLayouts[Key] = Layout;
739
740 // We're done laying out this struct.
741 bool EraseResult = RecordsBeingLaidOut.erase(Key); (void)EraseResult;
742 assert(EraseResult && "struct not in RecordsBeingLaidOut set?");
743
744 // If this struct blocked a FunctionType conversion, then recompute whatever
745 // was derived from that.
746 // FIXME: This is hugely overconservative.
747 if (SkippedLayout)
748 TypeCache.clear();
749
750 // If we're done converting the outer-most record, then convert any deferred
751 // structs as well.
752 if (RecordsBeingLaidOut.empty())
753 while (!DeferredRecords.empty())
754 ConvertRecordDeclType(DeferredRecords.pop_back_val());
755
756 return Ty;
757 }
758
759 /// getCGRecordLayout - Return record layout info for the given record decl.
760 const CGRecordLayout &
761 CodeGenTypes::getCGRecordLayout(const RecordDecl *RD) {
762 const Type *Key = Context.getTagDeclType(RD).getTypePtr();
763
764 const CGRecordLayout *Layout = CGRecordLayouts.lookup(Key);
765 if (!Layout) {
766 // Compute the type information.
767 ConvertRecordDeclType(RD);
768
769 // Now try again.
770 Layout = CGRecordLayouts.lookup(Key);
771 }
772
773 assert(Layout && "Unable to find record layout information for type");
774 return *Layout;
775 }
776
777 bool CodeGenTypes::isPointerZeroInitializable(QualType T) {
778 assert((T->isAnyPointerType() || T->isBlockPointerType()) && "Invalid type");
779 return isZeroInitializable(T);
780 }
781
782 bool CodeGenTypes::isZeroInitializable(QualType T) {
783 if (T->getAs<PointerType>())
784 return Context.getTargetNullPointerValue(T) == 0;
785
786 if (const auto *AT = Context.getAsArrayType(T)) {
787 if (isa<IncompleteArrayType>(AT))
788 return true;
789 if (const auto *CAT = dyn_cast<ConstantArrayType>(AT))
790 if (Context.getConstantArrayElementCount(CAT) == 0)
791 return true;
792 T = Context.getBaseElementType(T);
793 }
794
795 // Records are non-zero-initializable if they contain any
796 // non-zero-initializable subobjects.
797 if (const RecordType *RT = T->getAs<RecordType>()) {
798 const RecordDecl *RD = RT->getDecl();
799 return isZeroInitializable(RD);
800 }
801
802 // We have to ask the ABI about member pointers.
803 if (const MemberPointerType *MPT = T->getAs<MemberPointerType>())
804 return getCXXABI().isZeroInitializable(MPT);
805
806 // Everything else is okay.
807 return true;
808 }
809
810 bool CodeGenTypes::isZeroInitializable(const RecordDecl *RD) {
811 return getCGRecordLayout(RD).isZeroInitializable();
812 }
clang::CodeGen::CodeGenTypes::noRecordsBeingLaidOut
bool noRecordsBeingLaidOut() const
Definition: CodeGenTypes.h:369
clang::CodeGen::CodeGenTypes::getCXXABI
CGCXXABI & getCXXABI() const
Definition: CodeGenTypes.h:176
clang::CodeGen::CodeGenModule::getOpenCLRuntime
CGOpenCLRuntime & getOpenCLRuntime()
Return a reference to the configured OpenCL runtime.
Definition: CodeGenModule.h:565
ASTContext.h
Defines the clang::ASTContext interface.
clang::FunctionDecl
Represents a function declaration or definition.
Definition: Decl.h:1738
clang::PointerType
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2537
clang::PointerType::getPointeeType
QualType getPointeeType() const
Definition: Type.h:2550
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:638
clang::Type::isBlockPointerType
bool isBlockPointerType() const
Definition: Type.h:6304
clang::CodeGen::CodeGenModule::getCodeGenOpts
const CodeGenOptions & getCodeGenOpts() const
Definition: CodeGenModule.h:658
clang::CodeGen::CodeGenTypes::UpdateCompletedType
void UpdateCompletedType(const TagDecl *TD)
UpdateCompletedType - When we find the full definition for a TagDecl, replace the &#39;opaque&#39; type we pr...
Definition: CodeGenTypes.cpp:243
CGCall.h
clang::CodeGen::CGRecordLayout
CGRecordLayout - This class handles struct and union layout info while lowering AST types to LLVM typ...
Definition: CGRecordLayout.h:109
getTypeForFormat
static llvm::Type * getTypeForFormat(llvm::LLVMContext &VMContext, const llvm::fltSemantics &format, bool UseNativeHalf=false)
Definition: CodeGenTypes.cpp:290
clang::FunctionType
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3355
clang::CodeGen::CodeGenTypes::arrangeFreeFunctionType
const CGFunctionInfo & arrangeFreeFunctionType(CanQual< FunctionProtoType > Ty, const FunctionDecl *FD)
Arrange the argument and result information for a value of the given freestanding function type...
Definition: CGCall.cpp:190
clang::CodeGen::CodeGenTypes::addRecordTypeName
void addRecordTypeName(const RecordDecl *RD, llvm::StructType *Ty, StringRef suffix)
addRecordTypeName - Compute a name from the given record decl with an optional suffix and name the gi...
Definition: CodeGenTypes.cpp:51
clang::CodeGen::CodeGenTypes::isRecordBeingLaidOut
bool isRecordBeingLaidOut(const Type *Ty) const
Definition: CodeGenTypes.h:372
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1407
clang::ASTContext::getTargetInfo
const TargetInfo & getTargetInfo() const
Definition: ASTContext.h:690
DeclObjC.h
clang::AtomicType::getValueType
QualType getValueType() const
Gets the type contained by this atomic type, i.e.
Definition: Type.h:5983
clang::AutoTypeKeyword::Auto
auto
clang::CodeGen::CodeGenTypes::isFuncTypeConvertible
bool isFuncTypeConvertible(const FunctionType *FT)
isFuncTypeConvertible - Utility to check whether a function type can be converted to an LLVM type (i...
Definition: CodeGenTypes.cpp:229
clang::CodeGen::CodeGenTypeCache::Int8Ty
llvm::IntegerType * Int8Ty
i8, i16, i32, and i64
Definition: CodeGenTypeCache.h:38
clang::ArrayType::getElementType
QualType getElementType() const
Definition: Type.h:2847
clang::TagDecl::isCompleteDefinition
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3169
clang::EnumDecl::isFixed
bool isFixed() const
Returns true if this is an Objective-C, C++11, or Microsoft-style enumeration with a fixed underlying...
Definition: Decl.h:3529
clang::Type::getAs
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6748
clang::CodeGen::CodeGenModule::getModuleDebugInfo
CGDebugInfo * getModuleDebugInfo()
Definition: CodeGenModule.h:644
clang::CodeGen::CGDebugInfo
This class gathers all debug information during compilation and is responsible for emitting to llvm g...
Definition: CGDebugInfo.h:54
clang::CodeGen::CodeGenTypes::ConvertTypeForMem
llvm::Type * ConvertTypeForMem(QualType T)
ConvertTypeForMem - Convert type T into a llvm::Type.
Definition: CodeGenTypes.cpp:87
clang::MultiVersionKind::Target
clang::NamedDecl::getIdentifier
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:270
clang::RecordDecl
Represents a struct/union/class.
Definition: Decl.h:3593
CGRecordLayout.h
clang::CodeGen::CodeGenTypes::ConvertType
llvm::Type * ConvertType(QualType T)
ConvertType - Convert type T into a llvm::Type.
Definition: CodeGenTypes.cpp:383
clang::RecordDecl::getDefinition
RecordDecl * getDefinition() const
Returns the RecordDecl that actually defines this struct/union/class.
Definition: Decl.h:3774
clang::RecordDecl::fields
field_range fields() const
Definition: Decl.h:3784
clang::CodeGen::CodeGenModule::isPaddedAtomicType
bool isPaddedAtomicType(QualType type)
Definition: CodeGenTypes.cpp:687
isSafeToConvert
static bool isSafeToConvert(QualType T, CodeGenTypes &CGT, llvm::SmallPtrSet< const RecordDecl *, 16 > &AlreadyChecked)
isSafeToConvert - Return true if it is safe to convert this field type, which requires the structure ...
Definition: CodeGenTypes.cpp:158
clang::ASTContext::getConstantArrayElementCount
uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const
Return number of constant array elements.
Definition: ASTContext.cpp:5539
clang::QualType::getTypePtr
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:6072
CGFunctionInfo.h
llvm::SmallString
Definition: LLVM.h:35
clang::CodeGen::CodeGenTypes::~CodeGenTypes
~CodeGenTypes()
Definition: CodeGenTypes.cpp:39
clang::CodeGen::CGRecordLayout::isZeroInitializable
bool isZeroInitializable() const
Check whether this struct can be C++ zero-initialized with a zeroinitializer.
Definition: CGRecordLayout.h:173
clang::CodeGen::CGCXXABI::ConvertMemberPointerType
virtual llvm::Type * ConvertMemberPointerType(const MemberPointerType *MPT)
Find the LLVM type used to represent the given member pointer type.
Definition: CGCXXABI.cpp:43
clang::CodeGen::CGOpenCLRuntime::getPipeType
virtual llvm::Type * getPipeType(const PipeType *T, StringRef Name, llvm::Type *&PipeTy)
Definition: CGOpenCLRuntime.cpp:80
clang::CodeGen::CGOpenCLRuntime::convertOpenCLSpecificType
virtual llvm::Type * convertOpenCLSpecificType(const Type *T)
Definition: CGOpenCLRuntime.cpp:34
clang::CodeGen::CGCXXABI::isZeroInitializable
virtual bool isZeroInitializable(const MemberPointerType *MPT)
Return true if the given member pointer can be zero-initialized (in the C++ sense) with an LLVM zeroi...
Definition: CGCXXABI.cpp:123
clang::FunctionNoProtoType
Represents a K&R-style &#39;int foo()&#39; function, which has no information available about its arguments...
Definition: Type.h:3650
clang::FunctionProtoType
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3687
clang::CodeGen::CodeGenTypes::isPointerZeroInitializable
bool isPointerZeroInitializable(QualType T)
Check if the pointer type can be zero-initialized (in the C++ sense) with an LLVM zeroinitializer...
Definition: CodeGenTypes.cpp:777
clang::TagDecl::isDependentType
bool isDependentType() const
Whether this declaration declares a type that is dependent, i.e., a type that somehow depends on temp...
Definition: Decl.h:3220
clang::CodeGen::CodeGenTypes::CodeGenTypes
CodeGenTypes(CodeGenModule &cgm)
Definition: CodeGenTypes.cpp:32
clang::TagDecl::getKindName
StringRef getKindName() const
Definition: Decl.h:3239
clang::ReferenceType::getPointeeType
QualType getPointeeType() const
Definition: Type.h:2694
clang::Type::castAs
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:6811
clang::ASTContext::getTagDeclType
QualType getTagDeclType(const TagDecl *Decl) const
Return the unique reference to the type for the specified TagDecl (struct/union/class/enum) decl...
Definition: ASTContext.cpp:4948
CGCXXABI.h
clang::Decl::getDeclContext
DeclContext * getDeclContext()
Definition: DeclBase.h:427
clang::CodeGen::CodeGenTypes::getCodeGenOpts
const CodeGenOptions & getCodeGenOpts() const
Definition: CodeGenTypes.cpp:47
clang::ASTContext::getRecordType
QualType getRecordType(const RecordDecl *Decl) const
Definition: ASTContext.cpp:3903
clang::VectorType
Represents a GCC generic vector type.
Definition: Type.h:3168
clang::NamedDecl::printQualifiedName
void printQualifiedName(raw_ostream &OS) const
Returns a human-readable qualified name for this declaration, like A::B::i, for i being member of nam...
Definition: Decl.cpp:1527
clang::CodeGen::AlignmentSource::Type
The l-value was considered opaque, so the alignment was determined from a type.
clang::RecordType::getDecl
RecordDecl * getDecl() const
Definition: Type.h:4380
clang::TargetInfo::useFP16ConversionIntrinsics
virtual bool useFP16ConversionIntrinsics() const
Check whether llvm intrinsics such as llvm.convert.to.fp16 should be used to convert to and from __fp...
Definition: TargetInfo.h:723
clang::NamedDecl::printName
virtual void printName(raw_ostream &os) const
Definition: Decl.cpp:1516
clang::FunctionType::getReturnType
QualType getReturnType() const
Definition: Type.h:3613
TargetInfo.h
clang::TagDecl
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3064
clang::VectorType::getElementType
QualType getElementType() const
Definition: Type.h:3203
clang::ASTContext::getBaseElementType
QualType getBaseElementType(const ArrayType *VAT) const
Return the innermost element type of an array type.
Definition: ASTContext.cpp:5519
clang::ASTContext::getAsArrayType
const ArrayType * getAsArrayType(QualType T) const
Type Query functions.
Definition: ASTContext.cpp:5409
clang::CanQual
Represents a canonical, potentially-qualified type.
Definition: CanonicalType.h:66
clang::CodeGen::CodeGenTypes::isRecordLayoutComplete
bool isRecordLayoutComplete(const Type *Ty) const
isRecordLayoutComplete - Return true if the specified type is already completely laid out...
Definition: CodeGenTypes.cpp:102
clang::Type::isAnyPointerType
bool isAnyPointerType() const
Definition: Type.h:6300
CGOpenCLRuntime.h
clang::CodeGen::CodeGenTypes::getLLVMContext
llvm::LLVMContext & getLLVMContext()
Definition: CodeGenTypes.h:177
clang::Type::getTypeClass
TypeClass getTypeClass() const
Definition: Type.h:1811
clang::AtomicType
Definition: Type.h:5968
clang::QualType::isCanonical
bool isCanonical() const
Definition: Type.h:6116
clang::ASTContext::getFloatTypeSemantics
const llvm::fltSemantics & getFloatTypeSemantics(QualType T) const
Return the APFloat &#39;semantics&#39; for the specified scalar floating point type.
Definition: ASTContext.cpp:1541
clang::TypedefNameDecl
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2916
clang::CodeGen::CGFunctionInfo
CGFunctionInfo - Class to encapsulate the information about a function definition.
Definition: CGFunctionInfo.h:493
clang::CodeGen::CodeGenModule
This class organizes the cross-function state that is used while generating LLVM code.
Definition: CodeGenModule.h:274
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:22
type
CodeGenTypes.h
clang::serialized_diags::create
std::unique_ptr< DiagnosticConsumer > create(StringRef OutputFile, DiagnosticOptions *Diags, bool MergeChildRecords=false)
Returns a DiagnosticConsumer that serializes diagnostics to a bitcode file.
Definition: SerializedDiagnosticPrinter.cpp:297
clang::CodeGen::CGCXXABI::isMemberPointerConvertible
virtual bool isMemberPointerConvertible(const MemberPointerType *MPT) const
Return whether or not a member pointers type is convertible to an IR type.
Definition: CGCXXABI.h:186
clang::EnumDecl
Represents an enum.
Definition: Decl.h:3326
clang::MemberPointerType
A pointer to member type per C++ 8.3.3 - Pointers to members.
Definition: Type.h:2756
clang::CodeGen::CodeGenTypes::ConvertRecordDeclType
llvm::StructType * ConvertRecordDeclType(const RecordDecl *TD)
ConvertRecordDeclType - Lay out a tagged decl type like struct or union.
Definition: CodeGenTypes.cpp:696
clang::RecordType
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4370
clang::ArrayType::getIndexTypeCVRQualifiers
unsigned getIndexTypeCVRQualifiers() const
Definition: Type.h:2857
clang::CodeGen::CodeGenTypes::ConvertFunctionType
llvm::Type * ConvertFunctionType(QualType FT, const FunctionDecl *FD=nullptr)
Converts the GlobalDecl into an llvm::Type.
Definition: CodeGenTypes.cpp:312
clang::ConstantArrayType::getSize
const llvm::APInt & getSize() const
Definition: Type.h:2890
clang::CodeGen::CodeGenTypes
This class organizes the cross-module state that is used while lowering AST types to LLVM types...
Definition: CodeGenTypes.h:119
clang::CodeGenOptions
CodeGenOptions - Track various options which control how the code is optimized and passed to the back...
Definition: CodeGenOptions.h:46
clang::ReferenceType
Base for LValueReferenceType and RValueReferenceType.
Definition: Type.h:2673
clang::ASTContext::getTypeSize
uint64_t getTypeSize(QualType T) const
Return the size of the specified (complete) type T, in bits.
Definition: ASTContext.h:2070
clang::Type::isIncompleteType
bool isIncompleteType(NamedDecl **Def=nullptr) const
Types are partitioned into 3 broad categories (C99 6.2.5p1): object types, function types...
Definition: Type.cpp:2031
clang::CodeGen::CodeGenTypes::getContext
ASTContext & getContext() const
Definition: CodeGenTypes.h:173
clang::ASTContext::getCanonicalType
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2253
DeclCXX.h
Defines the C++ Decl subclasses, other than those for templates (found in DeclTemplate.h) and friends (in DeclFriend.h).
clang::TagDecl::getTypedefNameForAnonDecl
TypedefNameDecl * getTypedefNameForAnonDecl() const
Definition: Decl.h:3274
clang::CXXRecordDecl
Represents a C++ struct/union/class.
Definition: DeclCXX.h:300
clang::IncompleteArrayType
Represents a C array with an unspecified size.
Definition: Type.h:2926
RecordLayout.h
clang::CodeGen::CodeGenTypes::isFuncParamTypeConvertible
bool isFuncParamTypeConvertible(QualType Ty)
isFuncParamTypeConvertible - Return true if the specified type in a function parameter or result posi...
Definition: CodeGenTypes.cpp:195
Expr.h
clang::CodeGen::CodeGenTypes::RefreshTypeCacheForClass
void RefreshTypeCacheForClass(const CXXRecordDecl *RD)
Remove stale types from the type cache when an inheritance model gets assigned to a class...
Definition: CodeGenTypes.cpp:279
clang::EnumDecl::getIntegerType
QualType getIntegerType() const
Return the integer type this enum decl corresponds to.
Definition: Decl.h:3480
getKind
static Decl::Kind getKind(const Decl *D)
Definition: DeclBase.cpp:954
clang::VectorType::getNumElements
unsigned getNumElements() const
Definition: Type.h:3204
clang::ASTContext::getTargetNullPointerValue
uint64_t getTargetNullPointerValue(QualType QT) const
Get target-dependent integer value for null pointer which is used for constant folding.
Definition: ASTContext.cpp:10326
clang::CodeGen::CodeGenTypes::ComputeRecordLayout
CGRecordLayout * ComputeRecordLayout(const RecordDecl *D, llvm::StructType *Ty)
Compute a new LLVM record layout object for the given record.
Definition: CGRecordLayoutBuilder.cpp:723
clang::TagType
Definition: Type.h:4347
clang::VariableArrayType
Represents a C array with a specified size that is not an integer-constant-expression.
Definition: Type.h:2971
clang::ASTContext::getTargetAddressSpace
unsigned getTargetAddressSpace(QualType T) const
Definition: ASTContext.h:2499
clang::CodeGen::CodeGenTypes::getCGRecordLayout
const CGRecordLayout & getCGRecordLayout(const RecordDecl *)
getCGRecordLayout - Return record layout info for the given record decl.
Definition: CodeGenTypes.cpp:761
clang::ASTContext::getLangOpts
const LangOptions & getLangOpts() const
Definition: ASTContext.h:707
clang::ConstantArrayType
Represents the canonical version of C arrays with a specified constant size.
Definition: Type.h:2872
clang::CodeGen::CodeGenTypes::isZeroInitializable
bool isZeroInitializable(QualType T)
IsZeroInitializable - Return whether a type can be zero-initialized (in the C++ sense) with an LLVM z...
Definition: CodeGenTypes.cpp:782
clang::CodeGen::CodeGenTypes::GetFunctionType
llvm::FunctionType * GetFunctionType(const CGFunctionInfo &Info)
GetFunctionType - Get the LLVM function type for.
Definition: CGCall.cpp:1550