1 //===--- CodeGenModule.h - Per-Module state for LLVM CodeGen ----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This is the internal per-translation-unit state used for llvm translation.
12 //===----------------------------------------------------------------------===//
14 #ifndef CLANG_CODEGEN_CODEGENMODULE_H
15 #define CLANG_CODEGEN_CODEGENMODULE_H
17 #include "CGVTables.h"
18 #include "CodeGenTypes.h"
19 #include "clang/AST/Attr.h"
20 #include "clang/AST/DeclCXX.h"
21 #include "clang/AST/DeclObjC.h"
22 #include "clang/AST/GlobalDecl.h"
23 #include "clang/AST/Mangle.h"
24 #include "clang/Basic/ABI.h"
25 #include "clang/Basic/LangOptions.h"
26 #include "clang/Basic/Module.h"
27 #include "llvm/ADT/DenseMap.h"
28 #include "llvm/ADT/SetVector.h"
29 #include "llvm/ADT/SmallPtrSet.h"
30 #include "llvm/ADT/StringMap.h"
31 #include "llvm/IR/CallingConv.h"
32 #include "llvm/IR/Module.h"
33 #include "llvm/Support/ValueHandle.h"
34 #include "llvm/Transforms/Utils/BlackList.h"
48 class TargetCodeGenInfo;
54 class ObjCImplementationDecl;
55 class ObjCCategoryImplDecl;
56 class ObjCProtocolDecl;
71 class DiagnosticsEngine;
73 class CXXDestructorDecl;
80 class CodeGenFunction;
85 class CGOpenCLRuntime;
87 class BlockFieldFlags;
88 class FunctionArgList;
90 struct OrderGlobalInits {
91 unsigned int priority;
92 unsigned int lex_order;
93 OrderGlobalInits(unsigned int p, unsigned int l)
94 : priority(p), lex_order(l) {}
96 bool operator==(const OrderGlobalInits &RHS) const {
97 return priority == RHS.priority &&
98 lex_order == RHS.lex_order;
101 bool operator<(const OrderGlobalInits &RHS) const {
102 if (priority < RHS.priority)
105 return priority == RHS.priority && lex_order < RHS.lex_order;
109 struct CodeGenTypeCache {
113 /// i8, i16, i32, and i64
114 llvm::IntegerType *Int8Ty, *Int16Ty, *Int32Ty, *Int64Ty;
116 llvm::Type *FloatTy, *DoubleTy;
119 llvm::IntegerType *IntTy;
121 /// intptr_t, size_t, and ptrdiff_t, which we assume are the same size.
123 llvm::IntegerType *IntPtrTy;
124 llvm::IntegerType *SizeTy;
125 llvm::IntegerType *PtrDiffTy;
128 /// void* in address space 0
130 llvm::PointerType *VoidPtrTy;
131 llvm::PointerType *Int8PtrTy;
134 /// void** in address space 0
136 llvm::PointerType *VoidPtrPtrTy;
137 llvm::PointerType *Int8PtrPtrTy;
140 /// The width of a pointer into the generic address space.
141 unsigned char PointerWidthInBits;
143 /// The size and alignment of a pointer into the generic address
146 unsigned char PointerAlignInBytes;
147 unsigned char PointerSizeInBytes;
148 unsigned char SizeSizeInBytes; // sizeof(size_t)
151 llvm::CallingConv::ID RuntimeCC;
152 llvm::CallingConv::ID getRuntimeCC() const {
157 struct RREntrypoints {
158 RREntrypoints() { memset(this, 0, sizeof(*this)); }
159 /// void objc_autoreleasePoolPop(void*);
160 llvm::Constant *objc_autoreleasePoolPop;
162 /// void *objc_autoreleasePoolPush(void);
163 llvm::Constant *objc_autoreleasePoolPush;
166 struct ARCEntrypoints {
167 ARCEntrypoints() { memset(this, 0, sizeof(*this)); }
169 /// id objc_autorelease(id);
170 llvm::Constant *objc_autorelease;
172 /// id objc_autoreleaseReturnValue(id);
173 llvm::Constant *objc_autoreleaseReturnValue;
175 /// void objc_copyWeak(id *dest, id *src);
176 llvm::Constant *objc_copyWeak;
178 /// void objc_destroyWeak(id*);
179 llvm::Constant *objc_destroyWeak;
181 /// id objc_initWeak(id*, id);
182 llvm::Constant *objc_initWeak;
184 /// id objc_loadWeak(id*);
185 llvm::Constant *objc_loadWeak;
187 /// id objc_loadWeakRetained(id*);
188 llvm::Constant *objc_loadWeakRetained;
190 /// void objc_moveWeak(id *dest, id *src);
191 llvm::Constant *objc_moveWeak;
193 /// id objc_retain(id);
194 llvm::Constant *objc_retain;
196 /// id objc_retainAutorelease(id);
197 llvm::Constant *objc_retainAutorelease;
199 /// id objc_retainAutoreleaseReturnValue(id);
200 llvm::Constant *objc_retainAutoreleaseReturnValue;
202 /// id objc_retainAutoreleasedReturnValue(id);
203 llvm::Constant *objc_retainAutoreleasedReturnValue;
205 /// id objc_retainBlock(id);
206 llvm::Constant *objc_retainBlock;
208 /// void objc_release(id);
209 llvm::Constant *objc_release;
211 /// id objc_storeStrong(id*, id);
212 llvm::Constant *objc_storeStrong;
214 /// id objc_storeWeak(id*, id);
215 llvm::Constant *objc_storeWeak;
217 /// A void(void) inline asm to use to mark that the return value of
218 /// a call will be immediately retain.
219 llvm::InlineAsm *retainAutoreleasedReturnValueMarker;
221 /// void clang.arc.use(...);
222 llvm::Constant *clang_arc_use;
225 /// CodeGenModule - This class organizes the cross-function state that is used
226 /// while generating LLVM code.
227 class CodeGenModule : public CodeGenTypeCache {
228 CodeGenModule(const CodeGenModule &) LLVM_DELETED_FUNCTION;
229 void operator=(const CodeGenModule &) LLVM_DELETED_FUNCTION;
231 typedef std::vector<std::pair<llvm::Constant*, int> > CtorList;
234 const LangOptions &LangOpts;
235 const CodeGenOptions &CodeGenOpts;
236 const TargetOptions &TargetOpts;
237 llvm::Module &TheModule;
238 const llvm::DataLayout &TheDataLayout;
239 mutable const TargetCodeGenInfo *TheTargetCodeGenInfo;
240 DiagnosticsEngine &Diags;
245 /// VTables - Holds information about C++ vtables.
246 CodeGenVTables VTables;
247 friend class CodeGenVTables;
249 CGObjCRuntime* ObjCRuntime;
250 CGOpenCLRuntime* OpenCLRuntime;
251 CGCUDARuntime* CUDARuntime;
252 CGDebugInfo* DebugInfo;
253 ARCEntrypoints *ARCData;
254 llvm::MDNode *NoObjCARCExceptionsMetadata;
255 RREntrypoints *RRData;
257 // WeakRefReferences - A set of references that have only been seen via
258 // a weakref so far. This is used to remove the weak of the reference if we ever
259 // see a direct reference or a definition.
260 llvm::SmallPtrSet<llvm::GlobalValue*, 10> WeakRefReferences;
262 /// DeferredDecls - This contains all the decls which have definitions but
263 /// which are deferred for emission and therefore should only be output if
264 /// they are actually used. If a decl is in this, then it is known to have
265 /// not been referenced yet.
266 llvm::StringMap<GlobalDecl> DeferredDecls;
268 /// DeferredDeclsToEmit - This is a list of deferred decls which we have seen
269 /// that *are* actually referenced. These get code generated when the module
271 std::vector<GlobalDecl> DeferredDeclsToEmit;
273 /// DeferredVTables - A queue of (optional) vtables to consider emitting.
274 std::vector<const CXXRecordDecl*> DeferredVTables;
276 /// LLVMUsed - List of global values which are required to be
277 /// present in the object file; bitcast to i8*. This is used for
278 /// forcing visibility of symbols which may otherwise be optimized
280 std::vector<llvm::WeakVH> LLVMUsed;
282 /// GlobalCtors - Store the list of global constructors and their respective
283 /// priorities to be emitted when the translation unit is complete.
284 CtorList GlobalCtors;
286 /// GlobalDtors - Store the list of global destructors and their respective
287 /// priorities to be emitted when the translation unit is complete.
288 CtorList GlobalDtors;
290 /// MangledDeclNames - A map of canonical GlobalDecls to their mangled names.
291 llvm::DenseMap<GlobalDecl, StringRef> MangledDeclNames;
292 llvm::BumpPtrAllocator MangledNamesAllocator;
294 /// Global annotations.
295 std::vector<llvm::Constant*> Annotations;
297 /// Map used to get unique annotation strings.
298 llvm::StringMap<llvm::Constant*> AnnotationStrings;
300 llvm::StringMap<llvm::Constant*> CFConstantStringMap;
301 llvm::StringMap<llvm::GlobalVariable*> ConstantStringMap;
302 llvm::DenseMap<const Decl*, llvm::Constant *> StaticLocalDeclMap;
303 llvm::DenseMap<const Decl*, llvm::GlobalVariable*> StaticLocalDeclGuardMap;
305 llvm::DenseMap<QualType, llvm::Constant *> AtomicSetterHelperFnMap;
306 llvm::DenseMap<QualType, llvm::Constant *> AtomicGetterHelperFnMap;
308 /// CXXGlobalInits - Global variables with initializers that need to run
310 std::vector<llvm::Constant*> CXXGlobalInits;
312 /// When a C++ decl with an initializer is deferred, null is
313 /// appended to CXXGlobalInits, and the index of that null is placed
314 /// here so that the initializer will be performed in the correct
316 llvm::DenseMap<const Decl*, unsigned> DelayedCXXInitPosition;
318 typedef std::pair<OrderGlobalInits, llvm::Function*> GlobalInitData;
320 struct GlobalInitPriorityCmp {
321 bool operator()(const GlobalInitData &LHS,
322 const GlobalInitData &RHS) const {
323 return LHS.first.priority < RHS.first.priority;
327 /// - Global variables with initializers whose order of initialization
328 /// is set by init_priority attribute.
329 SmallVector<GlobalInitData, 8> PrioritizedCXXGlobalInits;
331 /// CXXGlobalDtors - Global destructor functions and arguments that need to
332 /// run on termination.
333 std::vector<std::pair<llvm::WeakVH,llvm::Constant*> > CXXGlobalDtors;
335 /// \brief The complete set of modules that has been imported.
336 llvm::SetVector<clang::Module *> ImportedModules;
338 /// @name Cache for Objective-C runtime types
341 /// CFConstantStringClassRef - Cached reference to the class for constant
342 /// strings. This value has type int * but is actually an Obj-C class pointer.
343 llvm::Constant *CFConstantStringClassRef;
345 /// ConstantStringClassRef - Cached reference to the class for constant
346 /// strings. This value has type int * but is actually an Obj-C class pointer.
347 llvm::Constant *ConstantStringClassRef;
349 /// \brief The LLVM type corresponding to NSConstantString.
350 llvm::StructType *NSConstantStringType;
352 /// \brief The type used to describe the state of a fast enumeration in
353 /// Objective-C's for..in loop.
354 QualType ObjCFastEnumerationStateType;
358 /// Lazily create the Objective-C runtime
359 void createObjCRuntime();
361 void createOpenCLRuntime();
362 void createCUDARuntime();
364 bool isTriviallyRecursive(const FunctionDecl *F);
365 bool shouldEmitFunction(const FunctionDecl *F);
366 llvm::LLVMContext &VMContext;
368 /// @name Cache for Blocks Runtime Globals
371 llvm::Constant *NSConcreteGlobalBlock;
372 llvm::Constant *NSConcreteStackBlock;
374 llvm::Constant *BlockObjectAssign;
375 llvm::Constant *BlockObjectDispose;
377 llvm::Type *BlockDescriptorType;
378 llvm::Type *GenericBlockLiteralType;
381 int GlobalUniqueCount;
384 /// void @llvm.lifetime.start(i64 %size, i8* nocapture <ptr>)
385 llvm::Constant *LifetimeStartFn;
387 /// void @llvm.lifetime.end(i64 %size, i8* nocapture <ptr>)
388 llvm::Constant *LifetimeEndFn;
390 GlobalDecl initializedGlobalDecl;
392 llvm::BlackList SanitizerBlacklist;
394 const SanitizerOptions &SanOpts;
398 CodeGenModule(ASTContext &C, const CodeGenOptions &CodeGenOpts,
399 const TargetOptions &TargetOpts, llvm::Module &M,
400 const llvm::DataLayout &TD, DiagnosticsEngine &Diags);
404 /// Release - Finalize LLVM code generation.
407 /// getObjCRuntime() - Return a reference to the configured
408 /// Objective-C runtime.
409 CGObjCRuntime &getObjCRuntime() {
410 if (!ObjCRuntime) createObjCRuntime();
414 /// hasObjCRuntime() - Return true iff an Objective-C runtime has
416 bool hasObjCRuntime() { return !!ObjCRuntime; }
418 /// getOpenCLRuntime() - Return a reference to the configured OpenCL runtime.
419 CGOpenCLRuntime &getOpenCLRuntime() {
420 assert(OpenCLRuntime != 0);
421 return *OpenCLRuntime;
424 /// getCUDARuntime() - Return a reference to the configured CUDA runtime.
425 CGCUDARuntime &getCUDARuntime() {
426 assert(CUDARuntime != 0);
430 /// getCXXABI() - Return a reference to the configured C++ ABI.
431 CGCXXABI &getCXXABI() { return ABI; }
433 ARCEntrypoints &getARCEntrypoints() const {
434 assert(getLangOpts().ObjCAutoRefCount && ARCData != 0);
438 RREntrypoints &getRREntrypoints() const {
443 llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) {
444 return StaticLocalDeclMap[D];
446 void setStaticLocalDeclAddress(const VarDecl *D,
448 StaticLocalDeclMap[D] = C;
451 llvm::GlobalVariable *getStaticLocalDeclGuardAddress(const VarDecl *D) {
452 return StaticLocalDeclGuardMap[D];
454 void setStaticLocalDeclGuardAddress(const VarDecl *D,
455 llvm::GlobalVariable *C) {
456 StaticLocalDeclGuardMap[D] = C;
459 llvm::Constant *getAtomicSetterHelperFnMap(QualType Ty) {
460 return AtomicSetterHelperFnMap[Ty];
462 void setAtomicSetterHelperFnMap(QualType Ty,
463 llvm::Constant *Fn) {
464 AtomicSetterHelperFnMap[Ty] = Fn;
467 llvm::Constant *getAtomicGetterHelperFnMap(QualType Ty) {
468 return AtomicGetterHelperFnMap[Ty];
470 void setAtomicGetterHelperFnMap(QualType Ty,
471 llvm::Constant *Fn) {
472 AtomicGetterHelperFnMap[Ty] = Fn;
475 CGDebugInfo *getModuleDebugInfo() { return DebugInfo; }
477 llvm::MDNode *getNoObjCARCExceptionsMetadata() {
478 if (!NoObjCARCExceptionsMetadata)
479 NoObjCARCExceptionsMetadata =
480 llvm::MDNode::get(getLLVMContext(),
481 SmallVector<llvm::Value*,1>());
482 return NoObjCARCExceptionsMetadata;
485 ASTContext &getContext() const { return Context; }
486 const CodeGenOptions &getCodeGenOpts() const { return CodeGenOpts; }
487 const LangOptions &getLangOpts() const { return LangOpts; }
488 llvm::Module &getModule() const { return TheModule; }
489 CodeGenTypes &getTypes() { return Types; }
490 CodeGenVTables &getVTables() { return VTables; }
491 VTableContext &getVTableContext() { return VTables.getVTableContext(); }
492 DiagnosticsEngine &getDiags() const { return Diags; }
493 const llvm::DataLayout &getDataLayout() const { return TheDataLayout; }
494 const TargetInfo &getTarget() const { return Context.getTargetInfo(); }
495 llvm::LLVMContext &getLLVMContext() { return VMContext; }
496 const TargetCodeGenInfo &getTargetCodeGenInfo();
497 bool isTargetDarwin() const;
499 bool shouldUseTBAA() const { return TBAA != 0; }
501 llvm::MDNode *getTBAAInfo(QualType QTy);
502 llvm::MDNode *getTBAAInfoForVTablePtr();
503 llvm::MDNode *getTBAAStructInfo(QualType QTy);
504 /// Return the MDNode in the type DAG for the given struct type.
505 llvm::MDNode *getTBAAStructTypeInfo(QualType QTy);
506 /// Return the path-aware tag for given base type, access node and offset.
507 llvm::MDNode *getTBAAStructTagInfo(QualType BaseTy, llvm::MDNode *AccessN,
510 bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor);
512 bool isPaddedAtomicType(QualType type);
513 bool isPaddedAtomicType(const AtomicType *type);
515 static void DecorateInstruction(llvm::Instruction *Inst,
516 llvm::MDNode *TBAAInfo);
518 /// getSize - Emit the given number of characters as a value of type size_t.
519 llvm::ConstantInt *getSize(CharUnits numChars);
521 /// setGlobalVisibility - Set the visibility for the given LLVM
523 void setGlobalVisibility(llvm::GlobalValue *GV, const NamedDecl *D) const;
525 /// setTLSMode - Set the TLS mode for the given LLVM GlobalVariable
526 /// for the thread-local variable declaration D.
527 void setTLSMode(llvm::GlobalVariable *GV, const VarDecl &D) const;
529 /// TypeVisibilityKind - The kind of global variable that is passed to
530 /// setTypeVisibility
531 enum TypeVisibilityKind {
534 TVK_ForConstructionVTable,
539 /// setTypeVisibility - Set the visibility for the given global
540 /// value which holds information about a type.
541 void setTypeVisibility(llvm::GlobalValue *GV, const CXXRecordDecl *D,
542 TypeVisibilityKind TVK) const;
544 static llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V) {
546 case DefaultVisibility: return llvm::GlobalValue::DefaultVisibility;
547 case HiddenVisibility: return llvm::GlobalValue::HiddenVisibility;
548 case ProtectedVisibility: return llvm::GlobalValue::ProtectedVisibility;
550 llvm_unreachable("unknown visibility!");
553 llvm::Constant *GetAddrOfGlobal(GlobalDecl GD) {
554 if (isa<CXXConstructorDecl>(GD.getDecl()))
555 return GetAddrOfCXXConstructor(cast<CXXConstructorDecl>(GD.getDecl()),
557 else if (isa<CXXDestructorDecl>(GD.getDecl()))
558 return GetAddrOfCXXDestructor(cast<CXXDestructorDecl>(GD.getDecl()),
560 else if (isa<FunctionDecl>(GD.getDecl()))
561 return GetAddrOfFunction(GD);
563 return GetAddrOfGlobalVar(cast<VarDecl>(GD.getDecl()));
566 /// CreateOrReplaceCXXRuntimeVariable - Will return a global variable of the given
567 /// type. If a variable with a different type already exists then a new
568 /// variable with the right type will be created and all uses of the old
569 /// variable will be replaced with a bitcast to the new variable.
570 llvm::GlobalVariable *
571 CreateOrReplaceCXXRuntimeVariable(StringRef Name, llvm::Type *Ty,
572 llvm::GlobalValue::LinkageTypes Linkage);
574 /// GetGlobalVarAddressSpace - Return the address space of the underlying
575 /// global variable for D, as determined by its declaration. Normally this
576 /// is the same as the address space of D's type, but in CUDA, address spaces
577 /// are associated with declarations, not types.
578 unsigned GetGlobalVarAddressSpace(const VarDecl *D, unsigned AddrSpace);
580 /// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the
581 /// given global variable. If Ty is non-null and if the global doesn't exist,
582 /// then it will be greated with the specified type instead of whatever the
583 /// normal requested type would be.
584 llvm::Constant *GetAddrOfGlobalVar(const VarDecl *D,
588 /// GetAddrOfFunction - Return the address of the given function. If Ty is
589 /// non-null, then this function will use the specified type if it has to
591 llvm::Constant *GetAddrOfFunction(GlobalDecl GD,
593 bool ForVTable = false);
595 /// GetAddrOfRTTIDescriptor - Get the address of the RTTI descriptor
596 /// for the given type.
597 llvm::Constant *GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH = false);
599 /// GetAddrOfUuidDescriptor - Get the address of a uuid descriptor .
600 llvm::Constant *GetAddrOfUuidDescriptor(const CXXUuidofExpr* E);
602 /// GetAddrOfThunk - Get the address of the thunk for the given global decl.
603 llvm::Constant *GetAddrOfThunk(GlobalDecl GD, const ThunkInfo &Thunk);
605 /// GetWeakRefReference - Get a reference to the target of VD.
606 llvm::Constant *GetWeakRefReference(const ValueDecl *VD);
608 /// GetNonVirtualBaseClassOffset - Returns the offset from a derived class to
609 /// a class. Returns null if the offset is 0.
611 GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl,
612 CastExpr::path_const_iterator PathBegin,
613 CastExpr::path_const_iterator PathEnd);
615 /// A pair of helper functions for a __block variable.
616 class ByrefHelpers : public llvm::FoldingSetNode {
618 llvm::Constant *CopyHelper;
619 llvm::Constant *DisposeHelper;
621 /// The alignment of the field. This is important because
622 /// different offsets to the field within the byref struct need to
623 /// have different helper functions.
626 ByrefHelpers(CharUnits alignment) : Alignment(alignment) {}
627 virtual ~ByrefHelpers();
629 void Profile(llvm::FoldingSetNodeID &id) const {
630 id.AddInteger(Alignment.getQuantity());
633 virtual void profileImpl(llvm::FoldingSetNodeID &id) const = 0;
635 virtual bool needsCopy() const { return true; }
636 virtual void emitCopy(CodeGenFunction &CGF,
637 llvm::Value *dest, llvm::Value *src) = 0;
639 virtual bool needsDispose() const { return true; }
640 virtual void emitDispose(CodeGenFunction &CGF, llvm::Value *field) = 0;
643 llvm::FoldingSet<ByrefHelpers> ByrefHelpersCache;
645 /// getUniqueBlockCount - Fetches the global unique block count.
646 int getUniqueBlockCount() { return ++Block.GlobalUniqueCount; }
648 /// getBlockDescriptorType - Fetches the type of a generic block
650 llvm::Type *getBlockDescriptorType();
652 /// getGenericBlockLiteralType - The type of a generic block literal.
653 llvm::Type *getGenericBlockLiteralType();
655 /// GetAddrOfGlobalBlock - Gets the address of a block which
656 /// requires no captures.
657 llvm::Constant *GetAddrOfGlobalBlock(const BlockExpr *BE, const char *);
659 /// GetAddrOfConstantCFString - Return a pointer to a constant CFString object
660 /// for the given string.
661 llvm::Constant *GetAddrOfConstantCFString(const StringLiteral *Literal);
663 /// GetAddrOfConstantString - Return a pointer to a constant NSString object
664 /// for the given string. Or a user defined String object as defined via
665 /// -fconstant-string-class=class_name option.
666 llvm::Constant *GetAddrOfConstantString(const StringLiteral *Literal);
668 /// GetConstantArrayFromStringLiteral - Return a constant array for the given
670 llvm::Constant *GetConstantArrayFromStringLiteral(const StringLiteral *E);
672 /// GetAddrOfConstantStringFromLiteral - Return a pointer to a constant array
673 /// for the given string literal.
674 llvm::Constant *GetAddrOfConstantStringFromLiteral(const StringLiteral *S);
676 /// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant
677 /// array for the given ObjCEncodeExpr node.
678 llvm::Constant *GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *);
680 /// GetAddrOfConstantString - Returns a pointer to a character array
681 /// containing the literal. This contents are exactly that of the given
682 /// string, i.e. it will not be null terminated automatically; see
683 /// GetAddrOfConstantCString. Note that whether the result is actually a
684 /// pointer to an LLVM constant depends on Feature.WriteableStrings.
686 /// The result has pointer to array type.
688 /// \param GlobalName If provided, the name to use for the global
689 /// (if one is created).
690 llvm::Constant *GetAddrOfConstantString(StringRef Str,
691 const char *GlobalName=0,
692 unsigned Alignment=1);
694 /// GetAddrOfConstantCString - Returns a pointer to a character array
695 /// containing the literal and a terminating '\0' character. The result has
696 /// pointer to array type.
698 /// \param GlobalName If provided, the name to use for the global (if one is
700 llvm::Constant *GetAddrOfConstantCString(const std::string &str,
701 const char *GlobalName=0,
702 unsigned Alignment=1);
704 /// GetAddrOfConstantCompoundLiteral - Returns a pointer to a constant global
705 /// variable for the given file-scope compound literal expression.
706 llvm::Constant *GetAddrOfConstantCompoundLiteral(const CompoundLiteralExpr*E);
708 /// \brief Retrieve the record type that describes the state of an
709 /// Objective-C fast enumeration loop (for..in).
710 QualType getObjCFastEnumerationStateType();
712 /// GetAddrOfCXXConstructor - Return the address of the constructor of the
714 llvm::GlobalValue *GetAddrOfCXXConstructor(const CXXConstructorDecl *ctor,
715 CXXCtorType ctorType,
716 const CGFunctionInfo *fnInfo = 0);
718 /// GetAddrOfCXXDestructor - Return the address of the constructor of the
720 llvm::GlobalValue *GetAddrOfCXXDestructor(const CXXDestructorDecl *dtor,
721 CXXDtorType dtorType,
722 const CGFunctionInfo *fnInfo = 0);
724 /// getBuiltinLibFunction - Given a builtin id for a function like
725 /// "__builtin_fabsf", return a Function* for "fabsf".
726 llvm::Value *getBuiltinLibFunction(const FunctionDecl *FD,
729 llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys =
730 ArrayRef<llvm::Type*>());
732 /// EmitTopLevelDecl - Emit code for a single top level declaration.
733 void EmitTopLevelDecl(Decl *D);
735 /// HandleCXXStaticMemberVarInstantiation - Tell the consumer that this
736 // variable has been instantiated.
737 void HandleCXXStaticMemberVarInstantiation(VarDecl *VD);
739 /// AddUsedGlobal - Add a global which should be forced to be
740 /// present in the object file; these are emitted to the llvm.used
742 void AddUsedGlobal(llvm::GlobalValue *GV);
744 /// AddCXXDtorEntry - Add a destructor and object to add to the C++ global
745 /// destructor function.
746 void AddCXXDtorEntry(llvm::Constant *DtorFn, llvm::Constant *Object) {
747 CXXGlobalDtors.push_back(std::make_pair(DtorFn, Object));
750 /// CreateRuntimeFunction - Create a new runtime function with the specified
752 llvm::Constant *CreateRuntimeFunction(llvm::FunctionType *Ty,
754 llvm::AttributeSet ExtraAttrs =
755 llvm::AttributeSet());
756 /// CreateRuntimeVariable - Create a new runtime global variable with the
757 /// specified type and name.
758 llvm::Constant *CreateRuntimeVariable(llvm::Type *Ty,
761 ///@name Custom Blocks Runtime Interfaces
764 llvm::Constant *getNSConcreteGlobalBlock();
765 llvm::Constant *getNSConcreteStackBlock();
766 llvm::Constant *getBlockObjectAssign();
767 llvm::Constant *getBlockObjectDispose();
771 llvm::Constant *getLLVMLifetimeStartFn();
772 llvm::Constant *getLLVMLifetimeEndFn();
774 // UpdateCompleteType - Make sure that this type is translated.
775 void UpdateCompletedType(const TagDecl *TD);
777 llvm::Constant *getMemberPointerConstant(const UnaryOperator *e);
779 /// EmitConstantInit - Try to emit the initializer for the given declaration
780 /// as a constant; returns 0 if the expression cannot be emitted as a
782 llvm::Constant *EmitConstantInit(const VarDecl &D, CodeGenFunction *CGF = 0);
784 /// EmitConstantExpr - Try to emit the given expression as a
785 /// constant; returns 0 if the expression cannot be emitted as a
787 llvm::Constant *EmitConstantExpr(const Expr *E, QualType DestType,
788 CodeGenFunction *CGF = 0);
790 /// EmitConstantValue - Emit the given constant value as a constant, in the
791 /// type's scalar representation.
792 llvm::Constant *EmitConstantValue(const APValue &Value, QualType DestType,
793 CodeGenFunction *CGF = 0);
795 /// EmitConstantValueForMemory - Emit the given constant value as a constant,
796 /// in the type's memory representation.
797 llvm::Constant *EmitConstantValueForMemory(const APValue &Value,
799 CodeGenFunction *CGF = 0);
801 /// EmitNullConstant - Return the result of value-initializing the given
802 /// type, i.e. a null expression of the given type. This is usually,
803 /// but not always, an LLVM null constant.
804 llvm::Constant *EmitNullConstant(QualType T);
806 /// EmitNullConstantForBase - Return a null constant appropriate for
807 /// zero-initializing a base class with the given type. This is usually,
808 /// but not always, an LLVM null constant.
809 llvm::Constant *EmitNullConstantForBase(const CXXRecordDecl *Record);
811 /// Error - Emit a general error that something can't be done.
812 void Error(SourceLocation loc, StringRef error);
814 /// ErrorUnsupported - Print out an error that codegen doesn't support the
815 /// specified stmt yet.
816 /// \param OmitOnError - If true, then this error should only be emitted if no
817 /// other errors have been reported.
818 void ErrorUnsupported(const Stmt *S, const char *Type,
819 bool OmitOnError=false);
821 /// ErrorUnsupported - Print out an error that codegen doesn't support the
822 /// specified decl yet.
823 /// \param OmitOnError - If true, then this error should only be emitted if no
824 /// other errors have been reported.
825 void ErrorUnsupported(const Decl *D, const char *Type,
826 bool OmitOnError=false);
828 /// SetInternalFunctionAttributes - Set the attributes on the LLVM
829 /// function for the given decl and function info. This applies
830 /// attributes necessary for handling the ABI as well as user
831 /// specified attributes like section.
832 void SetInternalFunctionAttributes(const Decl *D, llvm::Function *F,
833 const CGFunctionInfo &FI);
835 /// SetLLVMFunctionAttributes - Set the LLVM function attributes
836 /// (sext, zext, etc).
837 void SetLLVMFunctionAttributes(const Decl *D,
838 const CGFunctionInfo &Info,
841 /// SetLLVMFunctionAttributesForDefinition - Set the LLVM function attributes
842 /// which only apply to a function definintion.
843 void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F);
845 /// ReturnTypeUsesSRet - Return true iff the given type uses 'sret' when used
846 /// as a return type.
847 bool ReturnTypeUsesSRet(const CGFunctionInfo &FI);
849 /// ReturnTypeUsesFPRet - Return true iff the given type uses 'fpret' when
850 /// used as a return type.
851 bool ReturnTypeUsesFPRet(QualType ResultType);
853 /// ReturnTypeUsesFP2Ret - Return true iff the given type uses 'fp2ret' when
854 /// used as a return type.
855 bool ReturnTypeUsesFP2Ret(QualType ResultType);
857 /// ConstructAttributeList - Get the LLVM attributes and calling convention to
858 /// use for a particular function type.
860 /// \param Info - The function type information.
861 /// \param TargetDecl - The decl these attributes are being constructed
862 /// for. If supplied the attributes applied to this decl may contribute to the
863 /// function attributes and calling convention.
864 /// \param PAL [out] - On return, the attribute list to use.
865 /// \param CallingConv [out] - On return, the LLVM calling convention to use.
866 void ConstructAttributeList(const CGFunctionInfo &Info,
867 const Decl *TargetDecl,
868 AttributeListType &PAL,
869 unsigned &CallingConv,
870 bool AttrOnCallSite);
872 StringRef getMangledName(GlobalDecl GD);
873 void getBlockMangledName(GlobalDecl GD, MangleBuffer &Buffer,
874 const BlockDecl *BD);
876 void EmitTentativeDefinition(const VarDecl *D);
878 void EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired);
880 llvm::GlobalVariable::LinkageTypes
881 getFunctionLinkage(const FunctionDecl *FD);
883 void setFunctionLinkage(const FunctionDecl *FD, llvm::GlobalValue *V) {
884 V->setLinkage(getFunctionLinkage(FD));
887 /// getVTableLinkage - Return the appropriate linkage for the vtable, VTT,
888 /// and type information of the given class.
889 llvm::GlobalVariable::LinkageTypes getVTableLinkage(const CXXRecordDecl *RD);
891 /// GetTargetTypeStoreSize - Return the store size, in character units, of
892 /// the given LLVM type.
893 CharUnits GetTargetTypeStoreSize(llvm::Type *Ty) const;
895 /// GetLLVMLinkageVarDefinition - Returns LLVM linkage for a global
897 llvm::GlobalValue::LinkageTypes
898 GetLLVMLinkageVarDefinition(const VarDecl *D,
899 llvm::GlobalVariable *GV);
901 /// Emit all the global annotations.
902 void EmitGlobalAnnotations();
904 /// Emit an annotation string.
905 llvm::Constant *EmitAnnotationString(StringRef Str);
907 /// Emit the annotation's translation unit.
908 llvm::Constant *EmitAnnotationUnit(SourceLocation Loc);
910 /// Emit the annotation line number.
911 llvm::Constant *EmitAnnotationLineNo(SourceLocation L);
913 /// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the
914 /// annotation information for a given GlobalValue. The annotation struct is
915 /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the
916 /// GlobalValue being annotated. The second field is the constant string
917 /// created from the AnnotateAttr's annotation. The third field is a constant
918 /// string containing the name of the translation unit. The fourth field is
919 /// the line number in the file of the annotated value declaration.
920 llvm::Constant *EmitAnnotateAttr(llvm::GlobalValue *GV,
921 const AnnotateAttr *AA,
924 /// Add global annotations that are set on D, for the global GV. Those
925 /// annotations are emitted during finalization of the LLVM code.
926 void AddGlobalAnnotations(const ValueDecl *D, llvm::GlobalValue *GV);
928 const llvm::BlackList &getSanitizerBlacklist() const {
929 return SanitizerBlacklist;
932 const SanitizerOptions &getSanOpts() const { return SanOpts; }
934 void addDeferredVTable(const CXXRecordDecl *RD) {
935 DeferredVTables.push_back(RD);
939 llvm::GlobalValue *GetGlobalValue(StringRef Ref);
941 llvm::Constant *GetOrCreateLLVMFunction(StringRef MangledName,
945 llvm::AttributeSet ExtraAttrs =
946 llvm::AttributeSet());
947 llvm::Constant *GetOrCreateLLVMGlobal(StringRef MangledName,
948 llvm::PointerType *PTy,
950 bool UnnamedAddr = false);
952 /// SetCommonAttributes - Set attributes which are common to any
953 /// form of a global definition (alias, Objective-C method,
954 /// function, global variable).
956 /// NOTE: This should only be called for definitions.
957 void SetCommonAttributes(const Decl *D, llvm::GlobalValue *GV);
959 /// SetFunctionDefinitionAttributes - Set attributes for a global definition.
960 void SetFunctionDefinitionAttributes(const FunctionDecl *D,
961 llvm::GlobalValue *GV);
963 /// SetFunctionAttributes - Set function attributes for a function
965 void SetFunctionAttributes(GlobalDecl GD,
967 bool IsIncompleteFunction);
969 /// EmitGlobal - Emit code for a singal global function or var decl. Forward
970 /// declarations are emitted lazily.
971 void EmitGlobal(GlobalDecl D);
973 void EmitGlobalDefinition(GlobalDecl D);
975 void EmitGlobalFunctionDefinition(GlobalDecl GD);
976 void EmitGlobalVarDefinition(const VarDecl *D);
977 llvm::Constant *MaybeEmitGlobalStdInitializerListInitializer(const VarDecl *D,
979 void EmitAliasDefinition(GlobalDecl GD);
980 void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D);
981 void EmitObjCIvarInitializations(ObjCImplementationDecl *D);
983 // C++ related functions.
985 bool TryEmitDefinitionAsAlias(GlobalDecl Alias, GlobalDecl Target);
986 bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D);
988 void EmitNamespace(const NamespaceDecl *D);
989 void EmitLinkageSpec(const LinkageSpecDecl *D);
991 /// EmitCXXConstructors - Emit constructors (base, complete) from a
992 /// C++ constructor Decl.
993 void EmitCXXConstructors(const CXXConstructorDecl *D);
995 /// EmitCXXConstructor - Emit a single constructor with the given type from
996 /// a C++ constructor Decl.
997 void EmitCXXConstructor(const CXXConstructorDecl *D, CXXCtorType Type);
999 /// EmitCXXDestructors - Emit destructors (base, complete) from a
1000 /// C++ destructor Decl.
1001 void EmitCXXDestructors(const CXXDestructorDecl *D);
1003 /// EmitCXXDestructor - Emit a single destructor with the given type from
1004 /// a C++ destructor Decl.
1005 void EmitCXXDestructor(const CXXDestructorDecl *D, CXXDtorType Type);
1007 /// EmitCXXGlobalInitFunc - Emit the function that initializes C++ globals.
1008 void EmitCXXGlobalInitFunc();
1010 /// EmitCXXGlobalDtorFunc - Emit the function that destroys C++ globals.
1011 void EmitCXXGlobalDtorFunc();
1013 /// EmitCXXGlobalVarDeclInitFunc - Emit the function that initializes the
1014 /// specified global (if PerformInit is true) and registers its destructor.
1015 void EmitCXXGlobalVarDeclInitFunc(const VarDecl *D,
1016 llvm::GlobalVariable *Addr,
1019 // FIXME: Hardcoding priority here is gross.
1020 void AddGlobalCtor(llvm::Function *Ctor, int Priority=65535);
1021 void AddGlobalDtor(llvm::Function *Dtor, int Priority=65535);
1023 /// EmitCtorList - Generates a global array of functions and priorities using
1024 /// the given list and name. This array will have appending linkage and is
1025 /// suitable for use as a LLVM constructor or destructor array.
1026 void EmitCtorList(const CtorList &Fns, const char *GlobalName);
1028 /// EmitFundamentalRTTIDescriptor - Emit the RTTI descriptors for the
1030 void EmitFundamentalRTTIDescriptor(QualType Type);
1032 /// EmitFundamentalRTTIDescriptors - Emit the RTTI descriptors for the
1034 void EmitFundamentalRTTIDescriptors();
1036 /// EmitDeferred - Emit any needed decls for which code generation
1038 void EmitDeferred();
1040 /// EmitDeferredVTables - Emit any vtables which we deferred and
1041 /// still have a use for.
1042 void EmitDeferredVTables();
1044 /// EmitLLVMUsed - Emit the llvm.used metadata used to force
1045 /// references to global which may otherwise be optimized out.
1046 void EmitLLVMUsed();
1048 /// \brief Emit the link options introduced by imported modules.
1049 void EmitModuleLinkOptions();
1051 void EmitDeclMetadata();
1053 /// EmitCoverageFile - Emit the llvm.gcov metadata used to tell LLVM where
1054 /// to emit the .gcno and .gcda files in a way that persists in .bc files.
1055 void EmitCoverageFile();
1057 /// Emits the initializer for a uuidof string.
1058 llvm::Constant *EmitUuidofInitializer(StringRef uuidstr, QualType IIDType);
1060 /// MayDeferGeneration - Determine if the given decl can be emitted
1061 /// lazily; this is only relevant for definitions. The given decl
1062 /// must be either a function or var decl.
1063 bool MayDeferGeneration(const ValueDecl *D);
1065 /// SimplifyPersonality - Check whether we can use a "simpler", more
1066 /// core exceptions personality function.
1067 void SimplifyPersonality();
1069 } // end namespace CodeGen
1070 } // end namespace clang