clang 10.0.0git

CGCXX.cpp
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1 //===--- CGCXX.cpp - Emit LLVM Code for declarations ----------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This contains code dealing with C++ code generation.
10 //
11 //===----------------------------------------------------------------------===//
12
13 // We might split this into multiple files if it gets too unwieldy
14
15 #include "CGCXXABI.h"
16 #include "CodeGenFunction.h"
17 #include "CodeGenModule.h"
18 #include "clang/AST/ASTContext.h"
19 #include "clang/AST/Attr.h"
20 #include "clang/AST/Decl.h"
21 #include "clang/AST/DeclCXX.h"
22 #include "clang/AST/DeclObjC.h"
23 #include "clang/AST/Mangle.h"
24 #include "clang/AST/RecordLayout.h"
25 #include "clang/AST/StmtCXX.h"
26 #include "clang/Basic/CodeGenOptions.h"
27 #include "llvm/ADT/StringExtras.h"
28 using namespace clang;
29 using namespace CodeGen;
30
31
32 /// Try to emit a base destructor as an alias to its primary
33 /// base-class destructor.
34 bool CodeGenModule::TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D) {
35 if (!getCodeGenOpts().CXXCtorDtorAliases)
36 return true;
37
38 // Producing an alias to a base class ctor/dtor can degrade debug quality
39 // as the debugger cannot tell them apart.
40 if (getCodeGenOpts().OptimizationLevel == 0)
41 return true;
42
43 // If sanitizing memory to check for use-after-dtor, do not emit as
44 // an alias, unless this class owns no members.
45 if (getCodeGenOpts().SanitizeMemoryUseAfterDtor &&
46 !D->getParent()->field_empty())
47 return true;
48
49 // If the destructor doesn't have a trivial body, we have to emit it
50 // separately.
51 if (!D->hasTrivialBody())
52 return true;
53
54 const CXXRecordDecl *Class = D->getParent();
55
56 // We are going to instrument this destructor, so give up even if it is
57 // currently empty.
58 if (Class->mayInsertExtraPadding())
59 return true;
60
61 // If we need to manipulate a VTT parameter, give up.
62 if (Class->getNumVBases()) {
63 // Extra Credit: passing extra parameters is perfectly safe
64 // in many calling conventions, so only bail out if the ctor's
65 // calling convention is nonstandard.
66 return true;
67 }
68
69 // If any field has a non-trivial destructor, we have to emit the
70 // destructor separately.
71 for (const auto *I : Class->fields())
72 if (I->getType().isDestructedType())
73 return true;
74
75 // Try to find a unique base class with a non-trivial destructor.
76 const CXXRecordDecl *UniqueBase = nullptr;
77 for (const auto &I : Class->bases()) {
78
79 // We're in the base destructor, so skip virtual bases.
80 if (I.isVirtual()) continue;
81
82 // Skip base classes with trivial destructors.
83 const auto *Base =
84 cast<CXXRecordDecl>(I.getType()->castAs<RecordType>()->getDecl());
85 if (Base->hasTrivialDestructor()) continue;
86
87 // If we've already found a base class with a non-trivial
88 // destructor, give up.
89 if (UniqueBase) return true;
90 UniqueBase = Base;
91 }
92
93 // If we didn't find any bases with a non-trivial destructor, then
94 // the base destructor is actually effectively trivial, which can
95 // happen if it was needlessly user-defined or if there are virtual
96 // bases with non-trivial destructors.
97 if (!UniqueBase)
98 return true;
99
100 // If the base is at a non-zero offset, give up.
101 const ASTRecordLayout &ClassLayout = Context.getASTRecordLayout(Class);
102 if (!ClassLayout.getBaseClassOffset(UniqueBase).isZero())
103 return true;
104
105 // Give up if the calling conventions don't match. We could update the call,
106 // but it is probably not worth it.
107 const CXXDestructorDecl *BaseD = UniqueBase->getDestructor();
108 if (BaseD->getType()->castAs<FunctionType>()->getCallConv() !=
109 D->getType()->castAs<FunctionType>()->getCallConv())
110 return true;
111
112 GlobalDecl AliasDecl(D, Dtor_Base);
113 GlobalDecl TargetDecl(BaseD, Dtor_Base);
114
115 // The alias will use the linkage of the referent. If we can't
116 // support aliases with that linkage, fail.
117 llvm::GlobalValue::LinkageTypes Linkage = getFunctionLinkage(AliasDecl);
118
119 // We can't use an alias if the linkage is not valid for one.
120 if (!llvm::GlobalAlias::isValidLinkage(Linkage))
121 return true;
122
123 llvm::GlobalValue::LinkageTypes TargetLinkage =
124 getFunctionLinkage(TargetDecl);
125
126 // Check if we have it already.
127 StringRef MangledName = getMangledName(AliasDecl);
128 llvm::GlobalValue *Entry = GetGlobalValue(MangledName);
129 if (Entry && !Entry->isDeclaration())
130 return false;
131 if (Replacements.count(MangledName))
132 return false;
133
134 // Derive the type for the alias.
135 llvm::Type *AliasValueType = getTypes().GetFunctionType(AliasDecl);
136 llvm::PointerType *AliasType = AliasValueType->getPointerTo();
137
138 // Find the referent. Some aliases might require a bitcast, in
139 // which case the caller is responsible for ensuring the soundness
140 // of these semantics.
141 auto *Ref = cast<llvm::GlobalValue>(GetAddrOfGlobal(TargetDecl));
142 llvm::Constant *Aliasee = Ref;
143 if (Ref->getType() != AliasType)
144 Aliasee = llvm::ConstantExpr::getBitCast(Ref, AliasType);
145
146 // Instead of creating as alias to a linkonce_odr, replace all of the uses
147 // of the aliasee.
148 if (llvm::GlobalValue::isDiscardableIfUnused(Linkage) &&
149 !(TargetLinkage == llvm::GlobalValue::AvailableExternallyLinkage &&
150 TargetDecl.getDecl()->hasAttr<AlwaysInlineAttr>())) {
151 // FIXME: An extern template instantiation will create functions with
152 // linkage "AvailableExternally". In libc++, some classes also define
153 // members with attribute "AlwaysInline" and expect no reference to
154 // be generated. It is desirable to reenable this optimisation after
155 // corresponding LLVM changes.
156 addReplacement(MangledName, Aliasee);
157 return false;
158 }
159
160 // If we have a weak, non-discardable alias (weak, weak_odr), like an extern
161 // template instantiation or a dllexported class, avoid forming it on COFF.
162 // A COFF weak external alias cannot satisfy a normal undefined symbol
163 // reference from another TU. The other TU must also mark the referenced
164 // symbol as weak, which we cannot rely on.
165 if (llvm::GlobalValue::isWeakForLinker(Linkage) &&
166 getTriple().isOSBinFormatCOFF()) {
167 return true;
168 }
169
170 // If we don't have a definition for the destructor yet or the definition is
171 // avaialable_externally, don't emit an alias. We can't emit aliases to
172 // declarations; that's just not how aliases work.
173 if (Ref->isDeclarationForLinker())
174 return true;
175
176 // Don't create an alias to a linker weak symbol. This avoids producing
177 // different COMDATs in different TUs. Another option would be to
178 // output the alias both for weak_odr and linkonce_odr, but that
179 // requires explicit comdat support in the IL.
180 if (llvm::GlobalValue::isWeakForLinker(TargetLinkage))
181 return true;
182
183 // Create the alias with no name.
184 auto *Alias = llvm::GlobalAlias::create(AliasValueType, 0, Linkage, "",
185 Aliasee, &getModule());
186
187 // Destructors are always unnamed_addr.
188 Alias->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
189
190 // Switch any previous uses to the alias.
191 if (Entry) {
192 assert(Entry->getType() == AliasType &&
193 "declaration exists with different type");
194 Alias->takeName(Entry);
195 Entry->replaceAllUsesWith(Alias);
196 Entry->eraseFromParent();
197 } else {
198 Alias->setName(MangledName);
199 }
200
201 // Finally, set up the alias with its proper name and attributes.
202 SetCommonAttributes(AliasDecl, Alias);
203
204 return false;
205 }
206
207 llvm::Function *CodeGenModule::codegenCXXStructor(GlobalDecl GD) {
208 const CGFunctionInfo &FnInfo = getTypes().arrangeCXXStructorDeclaration(GD);
209 auto *Fn = cast<llvm::Function>(
210 getAddrOfCXXStructor(GD, &FnInfo, /*FnType=*/nullptr,
211 /*DontDefer=*/true, ForDefinition));
212
213 setFunctionLinkage(GD, Fn);
214
215 CodeGenFunction(*this).GenerateCode(GD, Fn, FnInfo);
216 setNonAliasAttributes(GD, Fn);
217 SetLLVMFunctionAttributesForDefinition(cast<CXXMethodDecl>(GD.getDecl()), Fn);
218 return Fn;
219 }
220
221 llvm::FunctionCallee CodeGenModule::getAddrAndTypeOfCXXStructor(
222 GlobalDecl GD, const CGFunctionInfo *FnInfo, llvm::FunctionType *FnType,
223 bool DontDefer, ForDefinition_t IsForDefinition) {
224 auto *MD = cast<CXXMethodDecl>(GD.getDecl());
225
226 if (isa<CXXDestructorDecl>(MD)) {
227 // Always alias equivalent complete destructors to base destructors in the
228 // MS ABI.
229 if (getTarget().getCXXABI().isMicrosoft() &&
230 GD.getDtorType() == Dtor_Complete &&
231 MD->getParent()->getNumVBases() == 0)
232 GD = GD.getWithDtorType(Dtor_Base);
233 }
234
235 if (!FnType) {
236 if (!FnInfo)
237 FnInfo = &getTypes().arrangeCXXStructorDeclaration(GD);
238 FnType = getTypes().GetFunctionType(*FnInfo);
239 }
240
241 llvm::Constant *Ptr = GetOrCreateLLVMFunction(
242 getMangledName(GD), FnType, GD, /*ForVTable=*/false, DontDefer,
243 /*IsThunk=*/false, /*ExtraAttrs=*/llvm::AttributeList(), IsForDefinition);
244 return {FnType, Ptr};
245 }
246
247 static CGCallee BuildAppleKextVirtualCall(CodeGenFunction &CGF,
248 GlobalDecl GD,
249 llvm::Type *Ty,
250 const CXXRecordDecl *RD) {
251 assert(!CGF.CGM.getTarget().getCXXABI().isMicrosoft() &&
252 "No kext in Microsoft ABI");
253 CodeGenModule &CGM = CGF.CGM;
254 llvm::Value *VTable = CGM.getCXXABI().getAddrOfVTable(RD, CharUnits());
255 Ty = Ty->getPointerTo()->getPointerTo();
256 VTable = CGF.Builder.CreateBitCast(VTable, Ty);
257 assert(VTable && "BuildVirtualCall = kext vtbl pointer is null");
258 uint64_t VTableIndex = CGM.getItaniumVTableContext().getMethodVTableIndex(GD);
259 const VTableLayout &VTLayout = CGM.getItaniumVTableContext().getVTableLayout(RD);
260 VTableLayout::AddressPointLocation AddressPoint =
261 VTLayout.getAddressPoint(BaseSubobject(RD, CharUnits::Zero()));
262 VTableIndex += VTLayout.getVTableOffset(AddressPoint.VTableIndex) +
263 AddressPoint.AddressPointIndex;
264 llvm::Value *VFuncPtr =
265 CGF.Builder.CreateConstInBoundsGEP1_64(VTable, VTableIndex, "vfnkxt");
266 llvm::Value *VFunc =
267 CGF.Builder.CreateAlignedLoad(VFuncPtr, CGF.PointerAlignInBytes);
268 CGCallee Callee(GD, VFunc);
269 return Callee;
270 }
271
272 /// BuildAppleKextVirtualCall - This routine is to support gcc's kext ABI making
273 /// indirect call to virtual functions. It makes the call through indexing
274 /// into the vtable.
275 CGCallee
276 CodeGenFunction::BuildAppleKextVirtualCall(const CXXMethodDecl *MD,
277 NestedNameSpecifier *Qual,
278 llvm::Type *Ty) {
279 assert((Qual->getKind() == NestedNameSpecifier::TypeSpec) &&
280 "BuildAppleKextVirtualCall - bad Qual kind");
281
282 const Type *QTy = Qual->getAsType();
283 QualType T = QualType(QTy, 0);
284 const RecordType *RT = T->getAs<RecordType>();
285 assert(RT && "BuildAppleKextVirtualCall - Qual type must be record");
286 const auto *RD = cast<CXXRecordDecl>(RT->getDecl());
287
288 if (const auto *DD = dyn_cast<CXXDestructorDecl>(MD))
289 return BuildAppleKextVirtualDestructorCall(DD, Dtor_Complete, RD);
290
291 return ::BuildAppleKextVirtualCall(*this, MD, Ty, RD);
292 }
293
294 /// BuildVirtualCall - This routine makes indirect vtable call for
295 /// call to virtual destructors. It returns 0 if it could not do it.
296 CGCallee
297 CodeGenFunction::BuildAppleKextVirtualDestructorCall(
298 const CXXDestructorDecl *DD,
299 CXXDtorType Type,
300 const CXXRecordDecl *RD) {
301 assert(DD->isVirtual() && Type != Dtor_Base);
302 // Compute the function type we're calling.
303 const CGFunctionInfo &FInfo = CGM.getTypes().arrangeCXXStructorDeclaration(
304 GlobalDecl(DD, Dtor_Complete));
305 llvm::Type *Ty = CGM.getTypes().GetFunctionType(FInfo);
306 return ::BuildAppleKextVirtualCall(*this, GlobalDecl(DD, Type), Ty, RD);
307 }
ASTContext.h
Defines the clang::ASTContext interface.
clang::CodeGen::CodeGenFunction::BuildAppleKextVirtualCall
CGCallee BuildAppleKextVirtualCall(const CXXMethodDecl *MD, NestedNameSpecifier *Qual, llvm::Type *Ty)
BuildAppleKextVirtualCall - This routine is to support gcc&#39;s kext ABI making indirect call to virtual...
Definition: CGCXX.cpp:276
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:654
clang::CodeGen::CodeGenModule::getTypes
CodeGenTypes & getTypes()
Definition: CodeGenModule.h:698
clang::CXXRecordDecl::bases
base_class_range bases()
Definition: DeclCXX.h:587
BuildAppleKextVirtualCall
static CGCallee BuildAppleKextVirtualCall(CodeGenFunction &CGF, GlobalDecl GD, llvm::Type *Ty, const CXXRecordDecl *RD)
Definition: CGCXX.cpp:247
clang::CodeGen::CodeGenModule::getCodeGenOpts
const CodeGenOptions & getCodeGenOpts() const
Definition: CodeGenModule.h:680
clang::GlobalDecl::getDtorType
CXXDtorType getDtorType() const
Definition: GlobalDecl.h:84
clang::ASTContext::getASTRecordLayout
const ASTRecordLayout & getASTRecordLayout(const RecordDecl *D) const
Get or compute information about the layout of the specified record (struct/union/class) D...
Definition: RecordLayoutBuilder.cpp:3023
clang::FunctionType
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3422
clang::ASTRecordLayout::getBaseClassOffset
CharUnits getBaseClassOffset(const CXXRecordDecl *Base) const
getBaseClassOffset - Get the offset, in chars, for the given base class.
Definition: RecordLayout.h:232
clang::CXXRecordDecl::getNumVBases
unsigned getNumVBases() const
Retrieves the number of virtual base classes of this class.
Definition: DeclCXX.h:602
Base
clang::CodeGen::CodeGenModule::getAddrOfCXXStructor
llvm::Constant * getAddrOfCXXStructor(GlobalDecl GD, const CGFunctionInfo *FnInfo=nullptr, llvm::FunctionType *FnType=nullptr, bool DontDefer=false, ForDefinition_t IsForDefinition=NotForDefinition)
Return the address of the constructor/destructor of the given type.
Definition: CodeGenModule.h:978
clang::CXXMethodDecl::isVirtual
bool isVirtual() const
Definition: DeclCXX.h:1976
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1450
clang::CodeGen::CodeGenModule::setFunctionLinkage
void setFunctionLinkage(GlobalDecl GD, llvm::Function *F)
Definition: CodeGenModule.h:1183
clang::CodeGen::CodeGenFunction::GenerateCode
void GenerateCode(GlobalDecl GD, llvm::Function *Fn, const CGFunctionInfo &FnInfo)
Definition: CodeGenFunction.cpp:1245
clang::VTableLayout::getAddressPoint
AddressPointLocation getAddressPoint(BaseSubobject Base) const
Definition: VTableBuilder.h:271
clang::CharUnits::isZero
bool isZero() const
isZero - Test whether the quantity equals zero.
Definition: CharUnits.h:116
DeclObjC.h
clang::CodeGen::CodeGenModule::TryEmitBaseDestructorAsAlias
bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D)
Try to emit a base destructor as an alias to its primary base-class destructor.
Definition: CGCXX.cpp:34
Value
Value
Definition: UninitializedValues.cpp:101
clang::VTableLayout::AddressPointLocation::AddressPointIndex
unsigned AddressPointIndex
Definition: VTableBuilder.h:236
clang::Type::getAs
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:7002
clang::RecordDecl::field_empty
bool field_empty() const
Definition: Decl.h:3971
clang::NestedNameSpecifier::getKind
SpecifierKind getKind() const
Determine what kind of nested name specifier is stored.
Definition: NestedNameSpecifier.cpp:142
clang::Linkage
Linkage
Describes the different kinds of linkage (C++ [basic.link], C99 6.2.2) that an entity may have...
Definition: Linkage.h:23
clang::RecordDecl::mayInsertExtraPadding
bool mayInsertExtraPadding(bool EmitRemark=false) const
Whether we are allowed to insert extra padding between fields.
Definition: Decl.cpp:4472
clang::TargetInfo::getCXXABI
TargetCXXABI getCXXABI() const
Get the C++ ABI currently in use.
Definition: TargetInfo.h:1063
clang::CodeGen::CodeGenFunction
CodeGenFunction - This class organizes the per-function state that is used while generating LLVM code...
Definition: CodeGenFunction.h:227
clang::FunctionDecl::hasTrivialBody
bool hasTrivialBody() const
Returns whether the function has a trivial body that does not require any specific codegen...
Definition: Decl.cpp:2870
clang::CodeGen::CodeGenFunction::BuildAppleKextVirtualDestructorCall
CGCallee BuildAppleKextVirtualDestructorCall(const CXXDestructorDecl *DD, CXXDtorType Type, const CXXRecordDecl *RD)
BuildVirtualCall - This routine makes indirect vtable call for call to virtual destructors.
Definition: CGCXX.cpp:297
clang::RecordDecl::fields
field_range fields() const
Definition: Decl.h:3963
clang::NestedNameSpecifier::getAsType
const Type * getAsType() const
Retrieve the type stored in this nested name specifier.
Definition: NestedNameSpecifier.h:194
clang::CharUnits::Zero
static CharUnits Zero()
Zero - Construct a CharUnits quantity of zero.
Definition: CharUnits.h:53
clang::CodeGen::CodeGenFunction::Builder
CGBuilderTy Builder
Definition: CodeGenFunction.h:263
StmtCXX.h
clang::CharUnits
CharUnits - This is an opaque type for sizes expressed in character units.
Definition: CharUnits.h:38
clang::VTableLayout::AddressPointLocation::VTableIndex
unsigned VTableIndex
Definition: VTableBuilder.h:236
clang::CodeGen::ForDefinition_t
ForDefinition_t
Definition: CodeGenModule.h:100
Mangle.h
clang::CXXRecordDecl::getDestructor
CXXDestructorDecl * getDestructor() const
Returns the destructor decl for this class.
Definition: DeclCXX.cpp:1770
clang::GlobalDecl::getWithDtorType
GlobalDecl getWithDtorType(CXXDtorType Type)
Definition: GlobalDecl.h:130
clang::Decl::hasAttr
bool hasAttr() const
Definition: DeclBase.h:542
clang::ASTRecordLayout
ASTRecordLayout - This class contains layout information for one RecordDecl, which is a struct/union/...
Definition: RecordLayout.h:38
clang::CodeGen::CodeGenTypes::arrangeCXXStructorDeclaration
const CGFunctionInfo & arrangeCXXStructorDeclaration(GlobalDecl GD)
Definition: CGCall.cpp:306
clang::CXXDtorType
CXXDtorType
C++ destructor types.
Definition: ABI.h:33
CodeGenModule.h
clang::Type::castAs
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:7067
clang::CXXDestructorDecl
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2649
CGCXXABI.h
clang::Dtor_Base
Base object dtor.
Definition: ABI.h:36
clang::BaseSubobject
Definition: BaseSubobject.h:30
clang::CodeGen::CodeGenModule::getFunctionLinkage
llvm::GlobalVariable::LinkageTypes getFunctionLinkage(GlobalDecl GD)
Definition: CodeGenModule.cpp:1205
clang::VTableLayout::AddressPointLocation
Definition: VTableBuilder.h:235
clang::CodeGen::CodeGenModule::getTarget
const TargetInfo & getTarget() const
Definition: CodeGenModule.h:686
clang::CodeGen::CodeGenModule::SetCommonAttributes
void SetCommonAttributes(GlobalDecl GD, llvm::GlobalValue *GV)
Set attributes which are common to any form of a global definition (alias, Objective-C method...
Definition: CodeGenModule.cpp:1654
clang::NestedNameSpecifier::TypeSpec
A type, stored as a Type*.
Definition: NestedNameSpecifier.h:88
CodeGenFunction.h
clang::GlobalDecl
GlobalDecl - represents a global declaration.
Definition: GlobalDecl.h:40
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:4505
clang::CodeGen::CGBuilderTy::CreateBitCast
Address CreateBitCast(Address Addr, llvm::Type *Ty, const llvm::Twine &Name="")
Definition: CGBuilder.h:141
Attr.h
clang::GlobalDecl::getDecl
const Decl * getDecl() const
Definition: GlobalDecl.h:77
clang::CXXMethodDecl
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:1931
clang::NestedNameSpecifier
Represents a C++ nested name specifier, such as "\::std::vector<int>::".
Definition: NestedNameSpecifier.h:48
clang::CodeGen::CodeGenModule::SetLLVMFunctionAttributesForDefinition
void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F)
Set the LLVM function attributes which only apply to a function definition.
Definition: CodeGenModule.cpp:1496
clang::CodeGen::CGCallee
All available information about a concrete callee.
Definition: CGCall.h:66
clang::Dtor_Complete
Complete object dtor.
Definition: ABI.h:35
clang::CodeGen::CodeGenModule::addReplacement
void addReplacement(StringRef Name, llvm::Constant *C)
Definition: CodeGenModule.cpp:236
clang::CodeGen::CodeGenModule::GetAddrOfGlobal
llvm::Constant * GetAddrOfGlobal(GlobalDecl GD, ForDefinition_t IsForDefinition=NotForDefinition)
Definition: CodeGenModule.cpp:3621
clang::CodeGen::CGFunctionInfo
CGFunctionInfo - Class to encapsulate the information about a function definition.
Definition: CGFunctionInfo.h:476
clang::CodeGen::CodeGenModule
This class organizes the cross-function state that is used while generating LLVM code.
Definition: CodeGenModule.h:280
clang::CodeGen::CodeGenModule::GetGlobalValue
llvm::GlobalValue * GetGlobalValue(StringRef Ref)
Definition: CodeGenModule.cpp:1142
Decl.h
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:21
clang::CodeGen::CodeGenTypeCache::PointerAlignInBytes
unsigned char PointerAlignInBytes
Definition: CodeGenTypeCache.h:87
CodeGenOptions.h
clang::CodeGen::CGBuilderTy::CreateAlignedLoad
llvm::LoadInst * CreateAlignedLoad(llvm::Value *Addr, CharUnits Align, const llvm::Twine &Name="")
Definition: CGBuilder.h:90
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:298
clang::CXXMethodDecl::getParent
const CXXRecordDecl * getParent() const
Return the parent of this method declaration, which is the class in which this method is defined...
Definition: DeclCXX.h:2046
clang::CodeGen::CodeGenModule::getModule
llvm::Module & getModule() const
Definition: CodeGenModule.h:681
clang::RecordType
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4495
clang::CodeGen::CodeGenModule::getMangledName
StringRef getMangledName(GlobalDecl GD)
Definition: CodeGenModule.cpp:1089
clang::CodeGen::CodeGenModule::getAddrAndTypeOfCXXStructor
llvm::FunctionCallee getAddrAndTypeOfCXXStructor(GlobalDecl GD, const CGFunctionInfo *FnInfo=nullptr, llvm::FunctionType *FnType=nullptr, bool DontDefer=false, ForDefinition_t IsForDefinition=NotForDefinition)
Definition: CGCXX.cpp:221
DeclCXX.h
Defines the C++ Decl subclasses, other than those for templates (found in DeclTemplate.h) and friends (in DeclFriend.h).
clang::CodeGen::ForDefinition
Definition: CodeGenModule.h:102
clang::CXXRecordDecl
Represents a C++ struct/union/class.
Definition: DeclCXX.h:253
RecordLayout.h
clang::VTableLayout
Definition: VTableBuilder.h:232
clang::TargetCXXABI::isMicrosoft
bool isMicrosoft() const
Is this ABI an MSVC-compatible ABI?
Definition: TargetCXXABI.h:160
clang::CodeGen::CodeGenModule::codegenCXXStructor
llvm::Function * codegenCXXStructor(GlobalDecl GD)
Definition: CGCXX.cpp:207
clang::ValueDecl::getType
QualType getType() const
Definition: Decl.h:630
clang::CodeGen::CodeGenFunction::CGM
CodeGenModule & CGM
Definition: CodeGenFunction.h:258
clang::VTableLayout::getVTableOffset
size_t getVTableOffset(size_t i) const
Definition: VTableBuilder.h:286
clang::CodeGen::CodeGenTypes::GetFunctionType
llvm::FunctionType * GetFunctionType(const CGFunctionInfo &Info)
GetFunctionType - Get the LLVM function type for.
Definition: CGCall.cpp:1556
clang::CodeGen::CodeGenModule::getTriple
const llvm::Triple & getTriple() const
Definition: CodeGenModule.h:687