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CGCXXABI.h
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1 //===----- CGCXXABI.h - Interface to C++ ABIs -------------------*- C++ -*-===//
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 provides an abstract class for C++ code generation. Concrete subclasses
10 // of this implement code generation for specific C++ ABIs.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_CLANG_LIB_CODEGEN_CGCXXABI_H
15 #define LLVM_CLANG_LIB_CODEGEN_CGCXXABI_H
16 
17 #include "CodeGenFunction.h"
18 #include "clang/Basic/LLVM.h"
20 
21 namespace llvm {
22 class Constant;
23 class Type;
24 class Value;
25 class CallInst;
26 }
27 
28 namespace clang {
29 class CastExpr;
30 class CXXConstructorDecl;
31 class CXXDestructorDecl;
32 class CXXMethodDecl;
33 class CXXRecordDecl;
34 class MangleContext;
35 
36 namespace CodeGen {
37 class CGCallee;
38 class CodeGenFunction;
39 class CodeGenModule;
40 struct CatchTypeInfo;
41 
42 /// Implements C++ ABI-specific code generation functions.
43 class CGCXXABI {
44 protected:
46  std::unique_ptr<MangleContext> MangleCtx;
47 
49  : CGM(CGM), MangleCtx(CGM.getContext().createMangleContext()) {}
50 
51 protected:
53  return CGF.CXXABIThisDecl;
54  }
55  llvm::Value *getThisValue(CodeGenFunction &CGF) {
56  return CGF.CXXABIThisValue;
57  }
59  return Address(
60  CGF.CXXABIThisValue,
61  CGF.ConvertTypeForMem(CGF.CXXABIThisDecl->getType()->getPointeeType()),
62  CGF.CXXABIThisAlignment);
63  }
64 
65  /// Issue a diagnostic about unsupported features in the ABI.
66  void ErrorUnsupportedABI(CodeGenFunction &CGF, StringRef S);
67 
68  /// Get a null value for unsupported member pointers.
69  llvm::Constant *GetBogusMemberPointer(QualType T);
70 
72  return CGF.CXXStructorImplicitParamDecl;
73  }
75  return CGF.CXXStructorImplicitParamValue;
76  }
77 
78  /// Loads the incoming C++ this pointer as it was passed by the caller.
79  llvm::Value *loadIncomingCXXThis(CodeGenFunction &CGF);
80 
81  void setCXXABIThisValue(CodeGenFunction &CGF, llvm::Value *ThisPtr);
82 
83  ASTContext &getContext() const { return CGM.getContext(); }
84 
85  bool mayNeedDestruction(const VarDecl *VD) const;
86 
87  /// Determine whether we will definitely emit this variable with a constant
88  /// initializer, either because the language semantics demand it or because
89  /// we know that the initializer is a constant.
90  // For weak definitions, any initializer available in the current translation
91  // is not necessarily reflective of the initializer used; such initializers
92  // are ignored unless if InspectInitForWeakDef is true.
93  bool
95  bool InspectInitForWeakDef = false) const;
96 
97  virtual bool requiresArrayCookie(const CXXDeleteExpr *E, QualType eltType);
98  virtual bool requiresArrayCookie(const CXXNewExpr *E);
99 
100  /// Determine whether there's something special about the rules of
101  /// the ABI tell us that 'this' is a complete object within the
102  /// given function. Obvious common logic like being defined on a
103  /// final class will have been taken care of by the caller.
104  virtual bool isThisCompleteObject(GlobalDecl GD) const = 0;
105 
106 public:
107 
108  virtual ~CGCXXABI();
109 
110  /// Gets the mangle context.
112  return *MangleCtx;
113  }
114 
115  /// Returns true if the given constructor or destructor is one of the
116  /// kinds that the ABI says returns 'this' (only applies when called
117  /// non-virtually for destructors).
118  ///
119  /// There currently is no way to indicate if a destructor returns 'this'
120  /// when called virtually, and code generation does not support the case.
121  virtual bool HasThisReturn(GlobalDecl GD) const { return false; }
122 
123  virtual bool hasMostDerivedReturn(GlobalDecl GD) const { return false; }
124 
125  virtual bool useSinitAndSterm() const { return false; }
126 
127  /// Returns true if the target allows calling a function through a pointer
128  /// with a different signature than the actual function (or equivalently,
129  /// bitcasting a function or function pointer to a different function type).
130  /// In principle in the most general case this could depend on the target, the
131  /// calling convention, and the actual types of the arguments and return
132  /// value. Here it just means whether the signature mismatch could *ever* be
133  /// allowed; in other words, does the target do strict checking of signatures
134  /// for all calls.
135  virtual bool canCallMismatchedFunctionType() const { return true; }
136 
137  /// If the C++ ABI requires the given type be returned in a particular way,
138  /// this method sets RetAI and returns true.
139  virtual bool classifyReturnType(CGFunctionInfo &FI) const = 0;
140 
141  /// Specify how one should pass an argument of a record type.
143  /// Pass it using the normal C aggregate rules for the ABI, potentially
144  /// introducing extra copies and passing some or all of it in registers.
146 
147  /// Pass it on the stack using its defined layout. The argument must be
148  /// evaluated directly into the correct stack position in the arguments area,
149  /// and the call machinery must not move it or introduce extra copies.
151 
152  /// Pass it as a pointer to temporary memory.
154  };
155 
156  /// Returns how an argument of the given record type should be passed.
157  virtual RecordArgABI getRecordArgABI(const CXXRecordDecl *RD) const = 0;
158 
159  /// Returns true if the implicit 'sret' parameter comes after the implicit
160  /// 'this' parameter of C++ instance methods.
161  virtual bool isSRetParameterAfterThis() const { return false; }
162 
163  /// Returns true if the ABI permits the argument to be a homogeneous
164  /// aggregate.
165  virtual bool
167  return true;
168  };
169 
170  /// Find the LLVM type used to represent the given member pointer
171  /// type.
172  virtual llvm::Type *
174 
175  /// Load a member function from an object and a member function
176  /// pointer. Apply the this-adjustment and set 'This' to the
177  /// adjusted value.
179  CodeGenFunction &CGF, const Expr *E, Address This,
180  llvm::Value *&ThisPtrForCall, llvm::Value *MemPtr,
181  const MemberPointerType *MPT);
182 
183  /// Calculate an l-value from an object and a data member pointer.
184  virtual llvm::Value *
186  Address Base, llvm::Value *MemPtr,
187  const MemberPointerType *MPT);
188 
189  /// Perform a derived-to-base, base-to-derived, or bitcast member
190  /// pointer conversion.
191  virtual llvm::Value *EmitMemberPointerConversion(CodeGenFunction &CGF,
192  const CastExpr *E,
193  llvm::Value *Src);
194 
195  /// Perform a derived-to-base, base-to-derived, or bitcast member
196  /// pointer conversion on a constant value.
197  virtual llvm::Constant *EmitMemberPointerConversion(const CastExpr *E,
198  llvm::Constant *Src);
199 
200  /// Return true if the given member pointer can be zero-initialized
201  /// (in the C++ sense) with an LLVM zeroinitializer.
202  virtual bool isZeroInitializable(const MemberPointerType *MPT);
203 
204  /// Return whether or not a member pointers type is convertible to an IR type.
205  virtual bool isMemberPointerConvertible(const MemberPointerType *MPT) const {
206  return true;
207  }
208 
209  /// Create a null member pointer of the given type.
210  virtual llvm::Constant *EmitNullMemberPointer(const MemberPointerType *MPT);
211 
212  /// Create a member pointer for the given method.
213  virtual llvm::Constant *EmitMemberFunctionPointer(const CXXMethodDecl *MD);
214 
215  /// Create a member pointer for the given field.
216  virtual llvm::Constant *EmitMemberDataPointer(const MemberPointerType *MPT,
217  CharUnits offset);
218 
219  /// Create a member pointer for the given member pointer constant.
220  virtual llvm::Constant *EmitMemberPointer(const APValue &MP, QualType MPT);
221 
222  /// Emit a comparison between two member pointers. Returns an i1.
223  virtual llvm::Value *
225  llvm::Value *L,
226  llvm::Value *R,
227  const MemberPointerType *MPT,
228  bool Inequality);
229 
230  /// Determine if a member pointer is non-null. Returns an i1.
231  virtual llvm::Value *
233  llvm::Value *MemPtr,
234  const MemberPointerType *MPT);
235 
236 protected:
237  /// A utility method for computing the offset required for the given
238  /// base-to-derived or derived-to-base member-pointer conversion.
239  /// Does not handle virtual conversions (in case we ever fully
240  /// support an ABI that allows this). Returns null if no adjustment
241  /// is required.
242  llvm::Constant *getMemberPointerAdjustment(const CastExpr *E);
243 
244 public:
245  virtual void emitVirtualObjectDelete(CodeGenFunction &CGF,
246  const CXXDeleteExpr *DE,
247  Address Ptr, QualType ElementType,
248  const CXXDestructorDecl *Dtor) = 0;
249  virtual void emitRethrow(CodeGenFunction &CGF, bool isNoReturn) = 0;
250  virtual void emitThrow(CodeGenFunction &CGF, const CXXThrowExpr *E) = 0;
251  virtual llvm::GlobalVariable *getThrowInfo(QualType T) { return nullptr; }
252 
253  /// Determine whether it's possible to emit a vtable for \p RD, even
254  /// though we do not know that the vtable has been marked as used by semantic
255  /// analysis.
256  virtual bool canSpeculativelyEmitVTable(const CXXRecordDecl *RD) const = 0;
257 
258  virtual void emitBeginCatch(CodeGenFunction &CGF, const CXXCatchStmt *C) = 0;
259 
260  virtual llvm::CallInst *
262  llvm::Value *Exn);
263 
264  virtual llvm::Constant *getAddrOfRTTIDescriptor(QualType Ty) = 0;
265  virtual CatchTypeInfo
266  getAddrOfCXXCatchHandlerType(QualType Ty, QualType CatchHandlerType) = 0;
268 
269  virtual bool shouldTypeidBeNullChecked(bool IsDeref,
270  QualType SrcRecordTy) = 0;
271  virtual void EmitBadTypeidCall(CodeGenFunction &CGF) = 0;
272  virtual llvm::Value *EmitTypeid(CodeGenFunction &CGF, QualType SrcRecordTy,
273  Address ThisPtr,
274  llvm::Type *StdTypeInfoPtrTy) = 0;
275 
276  virtual bool shouldDynamicCastCallBeNullChecked(bool SrcIsPtr,
277  QualType SrcRecordTy) = 0;
278 
279  virtual llvm::Value *
281  QualType SrcRecordTy, QualType DestTy,
282  QualType DestRecordTy, llvm::BasicBlock *CastEnd) = 0;
283 
284  virtual llvm::Value *EmitDynamicCastToVoid(CodeGenFunction &CGF,
285  Address Value,
286  QualType SrcRecordTy,
287  QualType DestTy) = 0;
288 
289  virtual bool EmitBadCastCall(CodeGenFunction &CGF) = 0;
290 
291  virtual llvm::Value *GetVirtualBaseClassOffset(CodeGenFunction &CGF,
292  Address This,
293  const CXXRecordDecl *ClassDecl,
294  const CXXRecordDecl *BaseClassDecl) = 0;
295 
296  virtual llvm::BasicBlock *EmitCtorCompleteObjectHandler(CodeGenFunction &CGF,
297  const CXXRecordDecl *RD);
298 
299  /// Emit the code to initialize hidden members required
300  /// to handle virtual inheritance, if needed by the ABI.
301  virtual void
303  const CXXRecordDecl *RD) {}
304 
305  /// Emit constructor variants required by this ABI.
306  virtual void EmitCXXConstructors(const CXXConstructorDecl *D) = 0;
307 
308  /// Additional implicit arguments to add to the beginning (Prefix) and end
309  /// (Suffix) of a constructor / destructor arg list.
310  ///
311  /// Note that Prefix should actually be inserted *after* the first existing
312  /// arg; `this` arguments always come first.
314  struct Arg {
315  llvm::Value *Value;
317  };
320  AddedStructorArgs() = default;
322  : Prefix(std::move(P)), Suffix(std::move(S)) {}
324  return {std::move(Args), {}};
325  }
327  return {{}, std::move(Args)};
328  }
329  };
330 
331  /// Similar to AddedStructorArgs, but only notes the number of additional
332  /// arguments.
334  unsigned Prefix = 0;
335  unsigned Suffix = 0;
336  AddedStructorArgCounts() = default;
337  AddedStructorArgCounts(unsigned P, unsigned S) : Prefix(P), Suffix(S) {}
338  static AddedStructorArgCounts prefix(unsigned N) { return {N, 0}; }
339  static AddedStructorArgCounts suffix(unsigned N) { return {0, N}; }
340  };
341 
342  /// Build the signature of the given constructor or destructor variant by
343  /// adding any required parameters. For convenience, ArgTys has been
344  /// initialized with the type of 'this'.
345  virtual AddedStructorArgCounts
347  SmallVectorImpl<CanQualType> &ArgTys) = 0;
348 
349  /// Returns true if the given destructor type should be emitted as a linkonce
350  /// delegating thunk, regardless of whether the dtor is defined in this TU or
351  /// not.
352  virtual bool useThunkForDtorVariant(const CXXDestructorDecl *Dtor,
353  CXXDtorType DT) const = 0;
354 
355  virtual void setCXXDestructorDLLStorage(llvm::GlobalValue *GV,
356  const CXXDestructorDecl *Dtor,
357  CXXDtorType DT) const;
358 
359  virtual llvm::GlobalValue::LinkageTypes
361  CXXDtorType DT) const;
362 
363  /// Emit destructor variants required by this ABI.
364  virtual void EmitCXXDestructors(const CXXDestructorDecl *D) = 0;
365 
366  /// Get the type of the implicit "this" parameter used by a method. May return
367  /// zero if no specific type is applicable, e.g. if the ABI expects the "this"
368  /// parameter to point to some artificial offset in a complete object due to
369  /// vbases being reordered.
370  virtual const CXXRecordDecl *
372  return MD->getParent();
373  }
374 
375  /// Perform ABI-specific "this" argument adjustment required prior to
376  /// a call of a virtual function.
377  /// The "VirtualCall" argument is true iff the call itself is virtual.
378  virtual Address
380  Address This, bool VirtualCall) {
381  return This;
382  }
383 
384  /// Build a parameter variable suitable for 'this'.
385  void buildThisParam(CodeGenFunction &CGF, FunctionArgList &Params);
386 
387  /// Insert any ABI-specific implicit parameters into the parameter list for a
388  /// function. This generally involves extra data for constructors and
389  /// destructors.
390  ///
391  /// ABIs may also choose to override the return type, which has been
392  /// initialized with the type of 'this' if HasThisReturn(CGF.CurGD) is true or
393  /// the formal return type of the function otherwise.
394  virtual void addImplicitStructorParams(CodeGenFunction &CGF, QualType &ResTy,
395  FunctionArgList &Params) = 0;
396 
397  /// Get the ABI-specific "this" parameter adjustment to apply in the prologue
398  /// of a virtual function.
400  return CharUnits::Zero();
401  }
402 
403  /// Emit the ABI-specific prolog for the function.
404  virtual void EmitInstanceFunctionProlog(CodeGenFunction &CGF) = 0;
405 
406  virtual AddedStructorArgs
408  CXXCtorType Type, bool ForVirtualBase,
409  bool Delegating) = 0;
410 
411  /// Add any ABI-specific implicit arguments needed to call a constructor.
412  ///
413  /// \return The number of arguments added at the beginning and end of the
414  /// call, which is typically zero or one.
415  AddedStructorArgCounts
417  CXXCtorType Type, bool ForVirtualBase,
418  bool Delegating, CallArgList &Args);
419 
420  /// Get the implicit (second) parameter that comes after the "this" pointer,
421  /// or nullptr if there is isn't one.
422  virtual llvm::Value *
425  bool ForVirtualBase, bool Delegating) = 0;
426 
427  /// Emit the destructor call.
428  virtual void EmitDestructorCall(CodeGenFunction &CGF,
430  bool ForVirtualBase, bool Delegating,
431  Address This, QualType ThisTy) = 0;
432 
433  /// Emits the VTable definitions required for the given record type.
434  virtual void emitVTableDefinitions(CodeGenVTables &CGVT,
435  const CXXRecordDecl *RD) = 0;
436 
437  /// Checks if ABI requires extra virtual offset for vtable field.
438  virtual bool
440  CodeGenFunction::VPtr Vptr) = 0;
441 
442  /// Checks if ABI requires to initialize vptrs for given dynamic class.
443  virtual bool doStructorsInitializeVPtrs(const CXXRecordDecl *VTableClass) = 0;
444 
445  /// Get the address point of the vtable for the given base subobject.
446  virtual llvm::Constant *
448  const CXXRecordDecl *VTableClass) = 0;
449 
450  /// Get the address point of the vtable for the given base subobject while
451  /// building a constructor or a destructor.
452  virtual llvm::Value *
455  const CXXRecordDecl *NearestVBase) = 0;
456 
457  /// Get the address point of the vtable for the given base subobject while
458  /// building a constexpr.
459  virtual llvm::Constant *
461  const CXXRecordDecl *VTableClass) = 0;
462 
463  /// Get the address of the vtable for the given record decl which should be
464  /// used for the vptr at the given offset in RD.
465  virtual llvm::GlobalVariable *getAddrOfVTable(const CXXRecordDecl *RD,
466  CharUnits VPtrOffset) = 0;
467 
468  /// Build a virtual function pointer in the ABI-specific way.
470  GlobalDecl GD, Address This,
471  llvm::Type *Ty,
472  SourceLocation Loc) = 0;
473 
474  using DeleteOrMemberCallExpr =
475  llvm::PointerUnion<const CXXDeleteExpr *, const CXXMemberCallExpr *>;
476 
477  /// Emit the ABI-specific virtual destructor call.
478  virtual llvm::Value *EmitVirtualDestructorCall(CodeGenFunction &CGF,
479  const CXXDestructorDecl *Dtor,
480  CXXDtorType DtorType,
481  Address This,
482  DeleteOrMemberCallExpr E) = 0;
483 
485  GlobalDecl GD,
486  CallArgList &CallArgs) {}
487 
488  /// Emit any tables needed to implement virtual inheritance. For Itanium,
489  /// this emits virtual table tables. For the MSVC++ ABI, this emits virtual
490  /// base tables.
491  virtual void emitVirtualInheritanceTables(const CXXRecordDecl *RD) = 0;
492 
493  virtual bool exportThunk() = 0;
494  virtual void setThunkLinkage(llvm::Function *Thunk, bool ForVTable,
495  GlobalDecl GD, bool ReturnAdjustment) = 0;
496 
497  virtual llvm::Value *performThisAdjustment(CodeGenFunction &CGF,
498  Address This,
499  const ThisAdjustment &TA) = 0;
500 
501  virtual llvm::Value *performReturnAdjustment(CodeGenFunction &CGF,
502  Address Ret,
503  const ReturnAdjustment &RA) = 0;
504 
505  virtual void EmitReturnFromThunk(CodeGenFunction &CGF,
506  RValue RV, QualType ResultType);
507 
508  virtual size_t getSrcArgforCopyCtor(const CXXConstructorDecl *,
509  FunctionArgList &Args) const = 0;
510 
511  /// Gets the offsets of all the virtual base pointers in a given class.
512  virtual std::vector<CharUnits> getVBPtrOffsets(const CXXRecordDecl *RD);
513 
514  /// Gets the pure virtual member call function.
515  virtual StringRef GetPureVirtualCallName() = 0;
516 
517  /// Gets the deleted virtual member call name.
518  virtual StringRef GetDeletedVirtualCallName() = 0;
519 
520  /**************************** Array cookies ******************************/
521 
522  /// Returns the extra size required in order to store the array
523  /// cookie for the given new-expression. May return 0 to indicate that no
524  /// array cookie is required.
525  ///
526  /// Several cases are filtered out before this method is called:
527  /// - non-array allocations never need a cookie
528  /// - calls to \::operator new(size_t, void*) never need a cookie
529  ///
530  /// \param expr - the new-expression being allocated.
532 
533  /// Initialize the array cookie for the given allocation.
534  ///
535  /// \param NewPtr - a char* which is the presumed-non-null
536  /// return value of the allocation function
537  /// \param NumElements - the computed number of elements,
538  /// potentially collapsed from the multidimensional array case;
539  /// always a size_t
540  /// \param ElementType - the base element allocated type,
541  /// i.e. the allocated type after stripping all array types
543  Address NewPtr,
544  llvm::Value *NumElements,
545  const CXXNewExpr *expr,
546  QualType ElementType);
547 
548  /// Reads the array cookie associated with the given pointer,
549  /// if it has one.
550  ///
551  /// \param Ptr - a pointer to the first element in the array
552  /// \param ElementType - the base element type of elements of the array
553  /// \param NumElements - an out parameter which will be initialized
554  /// with the number of elements allocated, or zero if there is no
555  /// cookie
556  /// \param AllocPtr - an out parameter which will be initialized
557  /// with a char* pointing to the address returned by the allocation
558  /// function
559  /// \param CookieSize - an out parameter which will be initialized
560  /// with the size of the cookie, or zero if there is no cookie
561  virtual void ReadArrayCookie(CodeGenFunction &CGF, Address Ptr,
562  const CXXDeleteExpr *expr,
563  QualType ElementType, llvm::Value *&NumElements,
564  llvm::Value *&AllocPtr, CharUnits &CookieSize);
565 
566  /// Return whether the given global decl needs a VTT parameter.
567  virtual bool NeedsVTTParameter(GlobalDecl GD);
568 
569 protected:
570  /// Returns the extra size required in order to store the array
571  /// cookie for the given type. Assumes that an array cookie is
572  /// required.
573  virtual CharUnits getArrayCookieSizeImpl(QualType elementType);
574 
575  /// Reads the array cookie for an allocation which is known to have one.
576  /// This is called by the standard implementation of ReadArrayCookie.
577  ///
578  /// \param ptr - a pointer to the allocation made for an array, as a char*
579  /// \param cookieSize - the computed cookie size of an array
580  ///
581  /// Other parameters are as above.
582  ///
583  /// \return a size_t
584  virtual llvm::Value *readArrayCookieImpl(CodeGenFunction &IGF, Address ptr,
585  CharUnits cookieSize);
586 
587 public:
588 
589  /*************************** Static local guards ****************************/
590 
591  /// Emits the guarded initializer and destructor setup for the given
592  /// variable, given that it couldn't be emitted as a constant.
593  /// If \p PerformInit is false, the initialization has been folded to a
594  /// constant and should not be performed.
595  ///
596  /// The variable may be:
597  /// - a static local variable
598  /// - a static data member of a class template instantiation
599  virtual void EmitGuardedInit(CodeGenFunction &CGF, const VarDecl &D,
600  llvm::GlobalVariable *DeclPtr,
601  bool PerformInit) = 0;
602 
603  /// Emit code to force the execution of a destructor during global
604  /// teardown. The default implementation of this uses atexit.
605  ///
606  /// \param Dtor - a function taking a single pointer argument
607  /// \param Addr - a pointer to pass to the destructor function.
608  virtual void registerGlobalDtor(CodeGenFunction &CGF, const VarDecl &D,
609  llvm::FunctionCallee Dtor,
610  llvm::Constant *Addr) = 0;
611 
612  /*************************** thread_local initialization ********************/
613 
614  /// Emits ABI-required functions necessary to initialize thread_local
615  /// variables in this translation unit.
616  ///
617  /// \param CXXThreadLocals - The thread_local declarations in this translation
618  /// unit.
619  /// \param CXXThreadLocalInits - If this translation unit contains any
620  /// non-constant initialization or non-trivial destruction for
621  /// thread_local variables, a list of functions to perform the
622  /// initialization.
623  virtual void EmitThreadLocalInitFuncs(
624  CodeGenModule &CGM, ArrayRef<const VarDecl *> CXXThreadLocals,
625  ArrayRef<llvm::Function *> CXXThreadLocalInits,
626  ArrayRef<const VarDecl *> CXXThreadLocalInitVars) = 0;
627 
628  // Determine if references to thread_local global variables can be made
629  // directly or require access through a thread wrapper function.
630  virtual bool usesThreadWrapperFunction(const VarDecl *VD) const = 0;
631 
632  /// Emit a reference to a non-local thread_local variable (including
633  /// triggering the initialization of all thread_local variables in its
634  /// translation unit).
636  const VarDecl *VD,
637  QualType LValType) = 0;
638 
639  /// Emit a single constructor/destructor with the given type from a C++
640  /// constructor Decl.
641  virtual void emitCXXStructor(GlobalDecl GD) = 0;
642 
643  /// Load a vtable from This, an object of polymorphic type RD, or from one of
644  /// its virtual bases if it does not have its own vtable. Returns the vtable
645  /// and the class from which the vtable was loaded.
646  virtual std::pair<llvm::Value *, const CXXRecordDecl *>
648  const CXXRecordDecl *RD) = 0;
649 };
650 
651 // Create an instance of a C++ ABI class:
652 
653 /// Creates an Itanium-family ABI.
654 CGCXXABI *CreateItaniumCXXABI(CodeGenModule &CGM);
655 
656 /// Creates a Microsoft-family ABI.
657 CGCXXABI *CreateMicrosoftCXXABI(CodeGenModule &CGM);
658 
660  llvm::CatchPadInst *CPI;
661 
662  CatchRetScope(llvm::CatchPadInst *CPI) : CPI(CPI) {}
663 
664  void Emit(CodeGenFunction &CGF, Flags flags) override {
665  llvm::BasicBlock *BB = CGF.createBasicBlock("catchret.dest");
666  CGF.Builder.CreateCatchRet(CPI, BB);
667  CGF.EmitBlock(BB);
668  }
669 };
670 }
671 }
672 
673 #endif
clang::CodeGen::CGCXXABI::canCallMismatchedFunctionType
virtual bool canCallMismatchedFunctionType() const
Returns true if the target allows calling a function through a pointer with a different signature tha...
Definition: CGCXXABI.h:135
clang::CodeGen::CGCXXABI::ReadArrayCookie
virtual void ReadArrayCookie(CodeGenFunction &CGF, Address Ptr, const CXXDeleteExpr *expr, QualType ElementType, llvm::Value *&NumElements, llvm::Value *&AllocPtr, CharUnits &CookieSize)
Reads the array cookie associated with the given pointer, if it has one.
Definition: CGCXXABI.cpp:248
clang::CodeGen::CreateItaniumCXXABI
CGCXXABI * CreateItaniumCXXABI(CodeGenModule &CGM)
Creates an Itanium-family ABI.
Definition: ItaniumCXXABI.cpp:514
clang::CodeGen::CodeGenFunction::ConvertTypeForMem
llvm::Type * ConvertTypeForMem(QualType T)
Definition: CodeGenFunction.cpp:208
clang::CodeGen::CGCXXABI::getCXXDestructorLinkage
virtual llvm::GlobalValue::LinkageTypes getCXXDestructorLinkage(GVALinkage Linkage, const CXXDestructorDecl *Dtor, CXXDtorType DT) const
Definition: CGCXXABI.cpp:315
llvm
YAML serialization mapping.
Definition: Dominators.h:30
clang::CXXConstructorDecl
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2421
clang::CodeGen::CGCXXABI::EmitMemberPointerConversion
virtual llvm::Value * EmitMemberPointerConversion(CodeGenFunction &CGF, const CastExpr *E, llvm::Value *Src)
Perform a derived-to-base, base-to-derived, or bitcast member pointer conversion.
Definition: CGCXXABI.cpp:67
clang::CodeGen::CGCXXABI::EmitBadCastCall
virtual bool EmitBadCastCall(CodeGenFunction &CGF)=0
clang::CodeGen::RValue
RValue - This trivial value class is used to represent the result of an expression that is evaluated.
Definition: CGValue.h:39
clang::CodeGen::CGCXXABI::EmitMemberFunctionPointer
virtual llvm::Constant * EmitMemberFunctionPointer(const CXXMethodDecl *MD)
Create a member pointer for the given method.
Definition: CGCXXABI.cpp:102
clang::CodeGen::CGCXXABI::ErrorUnsupportedABI
void ErrorUnsupportedABI(CodeGenFunction &CGF, StringRef S)
Issue a diagnostic about unsupported features in the ABI.
Definition: CGCXXABI.cpp:23
CodeGenFunction.h
clang::CodeGen::CGCXXABI::EmitThreadLocalVarDeclLValue
virtual LValue EmitThreadLocalVarDeclLValue(CodeGenFunction &CGF, const VarDecl *VD, QualType LValType)=0
Emit a reference to a non-local thread_local variable (including triggering the initialization of all...
Ret
static bool Ret(InterpState &S, CodePtr &PC, APValue &Result)
Definition: Interp.cpp:34
clang::CodeGen::CGCXXABI::getAddrOfCXXCatchHandlerType
virtual CatchTypeInfo getAddrOfCXXCatchHandlerType(QualType Ty, QualType CatchHandlerType)=0
clang::CodeGen::CGCXXABI::AddedStructorArgs::Arg
Definition: CGCXXABI.h:314
clang::CodeGen::CGCXXABI::HasThisReturn
virtual bool HasThisReturn(GlobalDecl GD) const
Returns true if the given constructor or destructor is one of the kinds that the ABI says returns 'th...
Definition: CGCXXABI.h:121
clang::CodeGen::CGCXXABI::LoadVTablePtr
virtual std::pair< llvm::Value *, const CXXRecordDecl * > LoadVTablePtr(CodeGenFunction &CGF, Address This, const CXXRecordDecl *RD)=0
Load a vtable from This, an object of polymorphic type RD, or from one of its virtual bases if it doe...
clang::CodeGen::CGCXXABI::RAA_DirectInMemory
@ RAA_DirectInMemory
Pass it on the stack using its defined layout.
Definition: CGCXXABI.h:150
clang::CodeGen::CGCXXABI::emitVirtualObjectDelete
virtual void emitVirtualObjectDelete(CodeGenFunction &CGF, const CXXDeleteExpr *DE, Address Ptr, QualType ElementType, const CXXDestructorDecl *Dtor)=0
clang::CodeGen::CGCXXABI::AddedStructorArgs::AddedStructorArgs
AddedStructorArgs(SmallVector< Arg, 1 > P, SmallVector< Arg, 1 > S)
Definition: CGCXXABI.h:321
llvm::SmallVector
Definition: LLVM.h:38
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:86
clang::CodeGen::CGCXXABI::classifyReturnType
virtual bool classifyReturnType(CGFunctionInfo &FI) const =0
If the C++ ABI requires the given type be returned in a particular way, this method sets RetAI and re...
clang::CodeGen::CGCXXABI::getMangleContext
MangleContext & getMangleContext()
Gets the mangle context.
Definition: CGCXXABI.h:111
clang::CodeGen::CGCXXABI::AddedStructorArgs::Arg::Value
llvm::Value * Value
Definition: CGCXXABI.h:315
clang::CodeGen::CGCXXABI::AddedStructorArgs
Additional implicit arguments to add to the beginning (Prefix) and end (Suffix) of a constructor / de...
Definition: CGCXXABI.h:313
clang::CodeGen::CGCXXABI::EmitGuardedInit
virtual void EmitGuardedInit(CodeGenFunction &CGF, const VarDecl &D, llvm::GlobalVariable *DeclPtr, bool PerformInit)=0
Emits the guarded initializer and destructor setup for the given variable, given that it couldn't be ...
clang::CodeGen::CGCXXABI::NeedsVTTParameter
virtual bool NeedsVTTParameter(GlobalDecl GD)
Return whether the given global decl needs a VTT parameter.
Definition: CGCXXABI.cpp:322
clang::CodeGen::CGCXXABI::InitializeArrayCookie
virtual Address InitializeArrayCookie(CodeGenFunction &CGF, Address NewPtr, llvm::Value *NumElements, const CXXNewExpr *expr, QualType ElementType)
Initialize the array cookie for the given allocation.
Definition: CGCXXABI.cpp:219
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:675
clang::CodeGen::CGCXXABI::MangleCtx
std::unique_ptr< MangleContext > MangleCtx
Definition: CGCXXABI.h:46
clang::GVALinkage
GVALinkage
A more specific kind of linkage than enum Linkage.
Definition: Linkage.h:73
clang::CodeGen::CodeGenModule::getContext
ASTContext & getContext() const
Definition: CodeGenModule.h:697
clang::CodeGen::CGCXXABI::isVirtualOffsetNeededForVTableField
virtual bool isVirtualOffsetNeededForVTableField(CodeGenFunction &CGF, CodeGenFunction::VPtr Vptr)=0
Checks if ABI requires extra virtual offset for vtable field.
clang::CodeGen::CGCXXABI::getMemberPointerAdjustment
llvm::Constant * getMemberPointerAdjustment(const CastExpr *E)
A utility method for computing the offset required for the given base-to-derived or derived-to-base m...
Definition: CGCXXABI.cpp:280
clang::CodeGen::CGCXXABI::setCXXABIThisValue
void setCXXABIThisValue(CodeGenFunction &CGF, llvm::Value *ThisPtr)
Definition: CGCXXABI.cpp:150
clang::CodeGen::CodeGenFunction::createBasicBlock
llvm::BasicBlock * createBasicBlock(const Twine &name="", llvm::Function *parent=nullptr, llvm::BasicBlock *before=nullptr)
createBasicBlock - Create an LLVM basic block.
Definition: CodeGenFunction.h:2430
clang::CXXNewExpr
Represents a new-expression for memory allocation and constructor calls, e.g: "new CXXNewExpr(foo)".
Definition: ExprCXX.h:2139
clang::CodeGen::CGCXXABI::usesThreadWrapperFunction
virtual bool usesThreadWrapperFunction(const VarDecl *VD) const =0
clang::CodeGen::CGCXXABI::isSRetParameterAfterThis
virtual bool isSRetParameterAfterThis() const
Returns true if the implicit 'sret' parameter comes after the implicit 'this' parameter of C++ instan...
Definition: CGCXXABI.h:161
clang::CodeGen::CatchRetScope::CPI
llvm::CatchPadInst * CPI
Definition: CGCXXABI.h:660
clang::CodeGen::CGCXXABI::registerGlobalDtor
virtual void registerGlobalDtor(CodeGenFunction &CGF, const VarDecl &D, llvm::FunctionCallee Dtor, llvm::Constant *Addr)=0
Emit code to force the execution of a destructor during global teardown.
clang::CodeGen::CGCXXABI::emitRethrow
virtual void emitRethrow(CodeGenFunction &CGF, bool isNoReturn)=0
clang::CodeGen::CatchRetScope::CatchRetScope
CatchRetScope(llvm::CatchPadInst *CPI)
Definition: CGCXXABI.h:662
clang::CodeGen::CGCXXABI::EmitTypeid
virtual llvm::Value * EmitTypeid(CodeGenFunction &CGF, QualType SrcRecordTy, Address ThisPtr, llvm::Type *StdTypeInfoPtrTy)=0
clang::CodeGen::CGCXXABI::EmitDestructorCall
virtual void EmitDestructorCall(CodeGenFunction &CGF, const CXXDestructorDecl *DD, CXXDtorType Type, bool ForVirtualBase, bool Delegating, Address This, QualType ThisTy)=0
Emit the destructor call.
clang::CodeGen::EHScopeStack::Cleanup::Flags
Generation flags.
Definition: EHScopeStack.h:156
clang::CodeGen::CodeGenFunction::Builder
CGBuilderTy Builder
Definition: CodeGenFunction.h:269
CodeGenABITypes.h
clang::CodeGen::CGCXXABI::getAddrOfRTTIDescriptor
virtual llvm::Constant * getAddrOfRTTIDescriptor(QualType Ty)=0
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1500
clang::CodeGen::CGCXXABI::mayNeedDestruction
bool mayNeedDestruction(const VarDecl *VD) const
Definition: CGCXXABI.cpp:156
clang::CXXThrowExpr
A C++ throw-expression (C++ [except.throw]).
Definition: ExprCXX.h:1181
clang::GlobalDecl
GlobalDecl - represents a global declaration.
Definition: GlobalDecl.h:56
clang::CodeGen::CGCXXABI::getAddrOfVTable
virtual llvm::GlobalVariable * getAddrOfVTable(const CXXRecordDecl *RD, CharUnits VPtrOffset)=0
Get the address of the vtable for the given record decl which should be used for the vptr at the give...
clang::CodeGen::CGCXXABI::RAA_Default
@ RAA_Default
Pass it using the normal C aggregate rules for the ABI, potentially introducing extra copies and pass...
Definition: CGCXXABI.h:145
clang::CodeGen::CGCXXABI::getCatchAllTypeInfo
virtual CatchTypeInfo getCatchAllTypeInfo()
Definition: CGCXXABI.cpp:333
clang::CodeGen::CGCXXABI::emitVirtualInheritanceTables
virtual void emitVirtualInheritanceTables(const CXXRecordDecl *RD)=0
Emit any tables needed to implement virtual inheritance.
clang::CodeGen::CGCXXABI::readArrayCookieImpl
virtual llvm::Value * readArrayCookieImpl(CodeGenFunction &IGF, Address ptr, CharUnits cookieSize)
Reads the array cookie for an allocation which is known to have one.
Definition: CGCXXABI.cpp:270
clang::CodeGen::CGCXXABI::loadIncomingCXXThis
llvm::Value * loadIncomingCXXThis(CodeGenFunction &CGF)
Loads the incoming C++ this pointer as it was passed by the caller.
Definition: CGCXXABI.cpp:145
clang::CodeGen::CGCXXABI::buildThisParam
void buildThisParam(CodeGenFunction &CGF, FunctionArgList &Params)
Build a parameter variable suitable for 'this'.
Definition: CGCXXABI.cpp:121
clang::CodeGen::CGCXXABI::EmitNullMemberPointer
virtual llvm::Constant * EmitNullMemberPointer(const MemberPointerType *MPT)
Create a null member pointer of the given type.
Definition: CGCXXABI.cpp:98
clang::ast_matchers::expr
const internal::VariadicDynCastAllOfMatcher< Stmt, Expr > expr
Matches expressions.
Definition: ASTMatchersInternal.cpp:890
clang::CodeGen::CGCXXABI::initializeHiddenVirtualInheritanceMembers
virtual void initializeHiddenVirtualInheritanceMembers(CodeGenFunction &CGF, const CXXRecordDecl *RD)
Emit the code to initialize hidden members required to handle virtual inheritance,...
Definition: CGCXXABI.h:302
clang::MangleContext
MangleContext - Context for tracking state which persists across multiple calls to the C++ name mangl...
Definition: Mangle.h:44
clang::CXXCtorType
CXXCtorType
C++ constructor types.
Definition: ABI.h:24
clang::CodeGen::CGCXXABI::EmitMemberPointerComparison
virtual llvm::Value * EmitMemberPointerComparison(CodeGenFunction &CGF, llvm::Value *L, llvm::Value *R, const MemberPointerType *MPT, bool Inequality)
Emit a comparison between two member pointers. Returns an i1.
Definition: CGCXXABI.cpp:80
clang::CodeGen::EHScopeStack::Cleanup
Information for lazily generating a cleanup.
Definition: EHScopeStack.h:141
clang::CodeGen::CGCXXABI::getImplicitConstructorArgs
virtual AddedStructorArgs getImplicitConstructorArgs(CodeGenFunction &CGF, const CXXConstructorDecl *D, CXXCtorType Type, bool ForVirtualBase, bool Delegating)=0
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::CodeGen::CGCXXABI::getVTableAddressPoint
virtual llvm::Constant * getVTableAddressPoint(BaseSubobject Base, const CXXRecordDecl *VTableClass)=0
Get the address point of the vtable for the given base subobject.
clang::CodeGen::CGCXXABI::AddedStructorArgs::AddedStructorArgs
AddedStructorArgs()=default
clang::BaseSubobject
Definition: BaseSubobject.h:30
clang::CodeGen::CGCXXABI::EmitMemberDataPointer
virtual llvm::Constant * EmitMemberDataPointer(const MemberPointerType *MPT, CharUnits offset)
Create a member pointer for the given field.
Definition: CGCXXABI.cpp:107
clang::CodeGen::CGCXXABI::addImplicitConstructorArgs
AddedStructorArgCounts addImplicitConstructorArgs(CodeGenFunction &CGF, const CXXConstructorDecl *D, CXXCtorType Type, bool ForVirtualBase, bool Delegating, CallArgList &Args)
Add any ABI-specific implicit arguments needed to call a constructor.
Definition: CGCXXABI.cpp:341
clang::ASTContext
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:208
clang::CXXDtorType
CXXDtorType
C++ destructor types.
Definition: ABI.h:33
clang::CodeGen::CGCXXABI::performReturnAdjustment
virtual llvm::Value * performReturnAdjustment(CodeGenFunction &CGF, Address Ret, const ReturnAdjustment &RA)=0
clang::CodeGen::CGCXXABI::emitThrow
virtual void emitThrow(CodeGenFunction &CGF, const CXXThrowExpr *E)=0
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:205
clang::CodeGen::CGCXXABI::getThrowInfo
virtual llvm::GlobalVariable * getThrowInfo(QualType T)
Definition: CGCXXABI.h:251
clang::CodeGen::CGCXXABI::RecordArgABI
RecordArgABI
Specify how one should pass an argument of a record type.
Definition: CGCXXABI.h:142
clang::CodeGen::CGCXXABI::getVTableAddressPointInStructor
virtual llvm::Value * getVTableAddressPointInStructor(CodeGenFunction &CGF, const CXXRecordDecl *RD, BaseSubobject Base, const CXXRecordDecl *NearestVBase)=0
Get the address point of the vtable for the given base subobject while building a constructor or a de...
clang::CodeGen::CGCXXABI::getThisArgumentTypeForMethod
virtual const CXXRecordDecl * getThisArgumentTypeForMethod(const CXXMethodDecl *MD)
Get the type of the implicit "this" parameter used by a method.
Definition: CGCXXABI.h:371
clang::CodeGen::CGCXXABI::getThisValue
llvm::Value * getThisValue(CodeGenFunction &CGF)
Definition: CGCXXABI.h:55
clang::CodeGen::CGCXXABI::AddedStructorArgCounts::Suffix
unsigned Suffix
Definition: CGCXXABI.h:335
clang::CodeGen::CGCXXABI::AddedStructorArgCounts::AddedStructorArgCounts
AddedStructorArgCounts(unsigned P, unsigned S)
Definition: CGCXXABI.h:337
clang::CodeGen::CGCXXABI::adjustThisArgumentForVirtualFunctionCall
virtual Address adjustThisArgumentForVirtualFunctionCall(CodeGenFunction &CGF, GlobalDecl GD, Address This, bool VirtualCall)
Perform ABI-specific "this" argument adjustment required prior to a call of a virtual function.
Definition: CGCXXABI.h:379
clang::CXXDestructorDecl
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2688
clang::CodeGen::CGCXXABI::performThisAdjustment
virtual llvm::Value * performThisAdjustment(CodeGenFunction &CGF, Address This, const ThisAdjustment &TA)=0
clang::ImplicitParamDecl
Definition: Decl.h:1613
clang::CodeGen::CGCXXABI::getThisAddress
Address getThisAddress(CodeGenFunction &CGF)
Definition: CGCXXABI.h:58
clang::CodeGen::CGCXXABI::AddedStructorArgCounts::suffix
static AddedStructorArgCounts suffix(unsigned N)
Definition: CGCXXABI.h:339
clang::CodeGen::CGCXXABI::EmitBadTypeidCall
virtual void EmitBadTypeidCall(CodeGenFunction &CGF)=0
clang::CodeGen::CGCXXABI::EmitLoadOfMemberFunctionPointer
virtual CGCallee EmitLoadOfMemberFunctionPointer(CodeGenFunction &CGF, const Expr *E, Address This, llvm::Value *&ThisPtrForCall, llvm::Value *MemPtr, const MemberPointerType *MPT)
Load a member function from an object and a member function pointer.
Definition: CGCXXABI.cpp:41
clang::VarDecl
Represents a variable declaration or definition.
Definition: Decl.h:874
clang::CodeGen::CGCXXABI::~CGCXXABI
virtual ~CGCXXABI()
Definition: CGCXXABI.cpp:21
clang::Type::getPointeeType
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee.
Definition: Type.cpp:625
clang::ReturnAdjustment
A return adjustment.
Definition: Thunk.h:26
clang::CodeGen::CGCXXABI::isEmittedWithConstantInitializer
bool isEmittedWithConstantInitializer(const VarDecl *VD, bool InspectInitForWeakDef=false) const
Determine whether we will definitely emit this variable with a constant initializer,...
Definition: CGCXXABI.cpp:169
clang::CodeGen::CGCXXABI::getVBPtrOffsets
virtual std::vector< CharUnits > getVBPtrOffsets(const CXXRecordDecl *RD)
Gets the offsets of all the virtual base pointers in a given class.
Definition: CGCXXABI.cpp:337
clang::CodeGen::CGCXXABI::getVirtualFunctionPointer
virtual CGCallee getVirtualFunctionPointer(CodeGenFunction &CGF, GlobalDecl GD, Address This, llvm::Type *Ty, SourceLocation Loc)=0
Build a virtual function pointer in the ABI-specific way.
clang::CodeGen::CGCXXABI::emitBeginCatch
virtual void emitBeginCatch(CodeGenFunction &CGF, const CXXCatchStmt *C)=0
clang::CodeGen::CGCXXABI::getStructorImplicitParamValue
llvm::Value *& getStructorImplicitParamValue(CodeGenFunction &CGF)
Definition: CGCXXABI.h:74
clang::CharUnits::Zero
static CharUnits Zero()
Zero - Construct a CharUnits quantity of zero.
Definition: CharUnits.h:53
clang::CodeGen::Address
An aligned address.
Definition: Address.h:74
Base
clang::CodeGen::CGCXXABI::AddedStructorArgCounts::AddedStructorArgCounts
AddedStructorArgCounts()=default
clang::CodeGen::CatchRetScope::Emit
void Emit(CodeGenFunction &CGF, Flags flags) override
Emit the cleanup.
Definition: CGCXXABI.h:664
clang::CodeGen::CGCXXABI::GetBogusMemberPointer
llvm::Constant * GetBogusMemberPointer(QualType T)
Get a null value for unsupported member pointers.
Definition: CGCXXABI.cpp:32
clang::CodeGen::CGCXXABI::getRecordArgABI
virtual RecordArgABI getRecordArgABI(const CXXRecordDecl *RD) const =0
Returns how an argument of the given record type should be passed.
clang::CodeGen::CGCXXABI::emitCXXStructor
virtual void emitCXXStructor(GlobalDecl GD)=0
Emit a single constructor/destructor with the given type from a C++ constructor Decl.
clang::CodeGen::CGCXXABI::setCXXDestructorDLLStorage
virtual void setCXXDestructorDLLStorage(llvm::GlobalValue *GV, const CXXDestructorDecl *Dtor, CXXDtorType DT) const
Definition: CGCXXABI.cpp:308
clang::CodeGen::CGCXXABI::emitTerminateForUnexpectedException
virtual llvm::CallInst * emitTerminateForUnexpectedException(CodeGenFunction &CGF, llvm::Value *Exn)
Definition: CGCXXABI.cpp:327
clang::CodeGen::CGCXXABI::isPermittedToBeHomogeneousAggregate
virtual bool isPermittedToBeHomogeneousAggregate(const CXXRecordDecl *RD) const
Returns true if the ABI permits the argument to be a homogeneous aggregate.
Definition: CGCXXABI.h:166
clang::CodeGen::CGCXXABI::useThunkForDtorVariant
virtual bool useThunkForDtorVariant(const CXXDestructorDecl *Dtor, CXXDtorType DT) const =0
Returns true if the given destructor type should be emitted as a linkonce delegating thunk,...
clang::CodeGen::CGCXXABI::EmitMemberPointer
virtual llvm::Constant * EmitMemberPointer(const APValue &MP, QualType MPT)
Create a member pointer for the given member pointer constant.
Definition: CGCXXABI.cpp:112
clang::CodeGen::CGCXXABI::getVTableAddressPointForConstExpr
virtual llvm::Constant * getVTableAddressPointForConstExpr(BaseSubobject Base, const CXXRecordDecl *VTableClass)=0
Get the address point of the vtable for the given base subobject while building a constexpr.
clang::CXXRecordDecl
Represents a C++ struct/union/class.
Definition: DeclCXX.h:254
clang::CodeGen::LValue
LValue - This represents an lvalue references.
Definition: CGValue.h:171
P
StringRef P
Definition: ASTMatchersInternal.cpp:563
clang::CodeGen::CGCXXABI::doStructorsInitializeVPtrs
virtual bool doStructorsInitializeVPtrs(const CXXRecordDecl *VTableClass)=0
Checks if ABI requires to initialize vptrs for given dynamic class.
clang::CodeGen::CGCXXABI::addImplicitStructorParams
virtual void addImplicitStructorParams(CodeGenFunction &CGF, QualType &ResTy, FunctionArgList &Params)=0
Insert any ABI-specific implicit parameters into the parameter list for a function.
clang::CodeGen::CodeGenFunction
CodeGenFunction - This class organizes the per-function state that is used while generating LLVM code...
Definition: CodeGenFunction.h:231
clang::CodeGen::CGCXXABI::RAA_Indirect
@ RAA_Indirect
Pass it as a pointer to temporary memory.
Definition: CGCXXABI.h:153
clang::CodeGen::CGCXXABI::setThunkLinkage
virtual void setThunkLinkage(llvm::Function *Thunk, bool ForVTable, GlobalDecl GD, bool ReturnAdjustment)=0
clang::CodeGen::CGCXXABI::AddedStructorArgCounts
Similar to AddedStructorArgs, but only notes the number of additional arguments.
Definition: CGCXXABI.h:333
clang::CodeGen::CodeGenModule
This class organizes the cross-function state that is used while generating LLVM code.
Definition: CodeGenModule.h:275
clang::CXXDeleteExpr
Represents a delete expression for memory deallocation and destructor calls, e.g.
Definition: ExprCXX.h:2415
llvm::ArrayRef
Definition: LLVM.h:34
Value
Value
Definition: UninitializedValues.cpp:102
clang::CodeGen::CGCXXABI::buildStructorSignature
virtual AddedStructorArgCounts buildStructorSignature(GlobalDecl GD, SmallVectorImpl< CanQualType > &ArgTys)=0
Build the signature of the given constructor or destructor variant by adding any required parameters.
clang::CodeGen::CGCXXABI::requiresArrayCookie
virtual bool requiresArrayCookie(const CXXDeleteExpr *E, QualType eltType)
Definition: CGCXXABI.cpp:229
clang::CodeGen::CGCXXABI::GetDeletedVirtualCallName
virtual StringRef GetDeletedVirtualCallName()=0
Gets the deleted virtual member call name.
clang::CodeGen::CGCallee
All available information about a concrete callee.
Definition: CGCall.h:63
clang::CodeGen::FunctionArgList
FunctionArgList - Type for representing both the decl and type of parameters to a function.
Definition: CGCall.h:356
LLVM.h
clang::CodeGen::CGCXXABI::hasMostDerivedReturn
virtual bool hasMostDerivedReturn(GlobalDecl GD) const
Definition: CGCXXABI.h:123
clang::CodeGen::CGCXXABI::AddedStructorArgs::Suffix
SmallVector< Arg, 1 > Suffix
Definition: CGCXXABI.h:319
clang::CodeGen::CGCXXABI::CGM
CodeGenModule & CGM
Definition: CGCXXABI.h:45
clang::CodeGen::CGCXXABI::EmitReturnFromThunk
virtual void EmitReturnFromThunk(CodeGenFunction &CGF, RValue RV, QualType ResultType)
Definition: CGCXXABI.cpp:201
clang::CodeGen::CGCXXABI::EmitMemberPointerIsNotNull
virtual llvm::Value * EmitMemberPointerIsNotNull(CodeGenFunction &CGF, llvm::Value *MemPtr, const MemberPointerType *MPT)
Determine if a member pointer is non-null. Returns an i1.
Definition: CGCXXABI.cpp:90
clang::CodeGen::CGCXXABI::AddedStructorArgs::prefix
static AddedStructorArgs prefix(SmallVector< Arg, 1 > Args)
Definition: CGCXXABI.h:323
clang::CodeGen::CGCXXABI::shouldTypeidBeNullChecked
virtual bool shouldTypeidBeNullChecked(bool IsDeref, QualType SrcRecordTy)=0
clang::MemberPointerType
A pointer to member type per C++ 8.3.3 - Pointers to members.
Definition: Type.h:2844
clang::CodeGen::CGFunctionInfo
CGFunctionInfo - Class to encapsulate the information about a function definition.
Definition: CGFunctionInfo.h:546
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:37
clang::CodeGen::CGCXXABI::EmitMemberDataPointerAddress
virtual llvm::Value * EmitMemberDataPointerAddress(CodeGenFunction &CGF, const Expr *E, Address Base, llvm::Value *MemPtr, const MemberPointerType *MPT)
Calculate an l-value from an object and a data member pointer.
Definition: CGCXXABI.cpp:58
std
Definition: Format.h:4296
clang::CodeGen::CGCXXABI::shouldDynamicCastCallBeNullChecked
virtual bool shouldDynamicCastCallBeNullChecked(bool SrcIsPtr, QualType SrcRecordTy)=0
clang::interp::This
bool This(InterpState &S, CodePtr OpPC)
Definition: Interp.h:829
clang::CodeGen::CGCXXABI::getCXXDestructorImplicitParam
virtual llvm::Value * getCXXDestructorImplicitParam(CodeGenFunction &CGF, const CXXDestructorDecl *DD, CXXDtorType Type, bool ForVirtualBase, bool Delegating)=0
Get the implicit (second) parameter that comes after the "this" pointer, or nullptr if there is isn't...
clang::CodeGen::CGCXXABI::EmitDynamicCastToVoid
virtual llvm::Value * EmitDynamicCastToVoid(CodeGenFunction &CGF, Address Value, QualType SrcRecordTy, QualType DestTy)=0
clang
Definition: CalledOnceCheck.h:17
clang::CodeGen::CGCXXABI::EmitCtorCompleteObjectHandler
virtual llvm::BasicBlock * EmitCtorCompleteObjectHandler(CodeGenFunction &CGF, const CXXRecordDecl *RD)
Definition: CGCXXABI.cpp:299
clang::CodeGen::CatchTypeInfo
The MS C++ ABI needs a pointer to RTTI data plus some flags to describe the type of a catch handler,...
Definition: CGCleanup.h:36
clang::CodeGen::CGCXXABI::canSpeculativelyEmitVTable
virtual bool canSpeculativelyEmitVTable(const CXXRecordDecl *RD) const =0
Determine whether it's possible to emit a vtable for RD, even though we do not know that the vtable h...
clang::CXXCatchStmt
CXXCatchStmt - This represents a C++ catch block.
Definition: StmtCXX.h:28
clang::CodeGen::CGCXXABI::EmitCXXConstructors
virtual void EmitCXXConstructors(const CXXConstructorDecl *D)=0
Emit constructor variants required by this ABI.
clang::CodeGen::CGCXXABI::EmitCXXDestructors
virtual void EmitCXXDestructors(const CXXDestructorDecl *D)=0
Emit destructor variants required by this ABI.
clang::CodeGen::CGCXXABI::DeleteOrMemberCallExpr
llvm::PointerUnion< const CXXDeleteExpr *, const CXXMemberCallExpr * > DeleteOrMemberCallExpr
Definition: CGCXXABI.h:475
clang::CodeGen::CGCXXABI::EmitInstanceFunctionProlog
virtual void EmitInstanceFunctionProlog(CodeGenFunction &CGF)=0
Emit the ABI-specific prolog for the function.
clang::CodeGen::CGCXXABI::getVirtualFunctionPrologueThisAdjustment
virtual CharUnits getVirtualFunctionPrologueThisAdjustment(GlobalDecl GD)
Get the ABI-specific "this" parameter adjustment to apply in the prologue of a virtual function.
Definition: CGCXXABI.h:399
clang::CodeGen::CGCXXABI::AddedStructorArgCounts::Prefix
unsigned Prefix
Definition: CGCXXABI.h:334
clang::CodeGen::CGCXXABI::emitVTableDefinitions
virtual void emitVTableDefinitions(CodeGenVTables &CGVT, const CXXRecordDecl *RD)=0
Emits the VTable definitions required for the given record type.
clang::CodeGen::CGCXXABI::GetVirtualBaseClassOffset
virtual llvm::Value * GetVirtualBaseClassOffset(CodeGenFunction &CGF, Address This, const CXXRecordDecl *ClassDecl, const CXXRecordDecl *BaseClassDecl)=0
clang::CodeGen::CodeGenFunction::VPtr
Struct with all information about dynamic [sub]class needed to set vptr.
Definition: CodeGenFunction.h:2266
clang::CodeGen::CodeGenVTables
Definition: CGVTables.h:32
clang::CodeGen::CGCXXABI::useSinitAndSterm
virtual bool useSinitAndSterm() const
Definition: CGCXXABI.h:125
clang::CodeGen::CGCXXABI
Implements C++ ABI-specific code generation functions.
Definition: CGCXXABI.h:43
clang::CodeGen::CGCXXABI::EmitVirtualDestructorCall
virtual llvm::Value * EmitVirtualDestructorCall(CodeGenFunction &CGF, const CXXDestructorDecl *Dtor, CXXDtorType DtorType, Address This, DeleteOrMemberCallExpr E)=0
Emit the ABI-specific virtual destructor call.
clang::CodeGen::CatchRetScope
Definition: CGCXXABI.h:659
clang::CharUnits
CharUnits - This is an opaque type for sizes expressed in character units.
Definition: CharUnits.h:38
clang::APValue
APValue - This class implements a discriminated union of [uninitialized] [APSInt] [APFloat],...
Definition: APValue.h:122
clang::CodeGen::CGCXXABI::getStructorImplicitParamDecl
ImplicitParamDecl *& getStructorImplicitParamDecl(CodeGenFunction &CGF)
Definition: CGCXXABI.h:71
clang::CodeGen::CGCXXABI::AddedStructorArgs::Arg::Type
QualType Type
Definition: CGCXXABI.h:316
llvm::SmallVectorImpl
Definition: Randstruct.h:18
clang::ValueDecl::getType
QualType getType() const
Definition: Decl.h:685
clang::Expr
This represents one expression.
Definition: Expr.h:109
clang::CodeGen::CGCXXABI::isThisCompleteObject
virtual bool isThisCompleteObject(GlobalDecl GD) const =0
Determine whether there's something special about the rules of the ABI tell us that 'this' is a compl...
clang::CodeGen::CGCXXABI::adjustCallArgsForDestructorThunk
virtual void adjustCallArgsForDestructorThunk(CodeGenFunction &CGF, GlobalDecl GD, CallArgList &CallArgs)
Definition: CGCXXABI.h:484
clang::CodeGen::CreateMicrosoftCXXABI
CGCXXABI * CreateMicrosoftCXXABI(CodeGenModule &CGM)
Creates a Microsoft-family ABI.
Definition: MicrosoftCXXABI.cpp:3542
clang::ThisAdjustment
A this pointer adjustment.
Definition: Thunk.h:91
clang::CodeGen::CGCXXABI::exportThunk
virtual bool exportThunk()=0
clang::CodeGen::CGCXXABI::getArrayCookieSizeImpl
virtual CharUnits getArrayCookieSizeImpl(QualType elementType)
Returns the extra size required in order to store the array cookie for the given type.
Definition: CGCXXABI.cpp:214
clang::CodeGen::CGCXXABI::CGCXXABI
CGCXXABI(CodeGenModule &CGM)
Definition: CGCXXABI.h:48
clang::CodeGen::CGCXXABI::EmitThreadLocalInitFuncs
virtual void EmitThreadLocalInitFuncs(CodeGenModule &CGM, ArrayRef< const VarDecl * > CXXThreadLocals, ArrayRef< llvm::Function * > CXXThreadLocalInits, ArrayRef< const VarDecl * > CXXThreadLocalInitVars)=0
Emits ABI-required functions necessary to initialize thread_local variables in this translation unit.
clang::CastExpr
CastExpr - Base class for type casts, including both implicit casts (ImplicitCastExpr) and explicit c...
Definition: Expr.h:3475
clang::CodeGen::CGCXXABI::GetPureVirtualCallName
virtual StringRef GetPureVirtualCallName()=0
Gets the pure virtual member call function.
clang::CodeGen::CallArgList
CallArgList - Type for representing both the value and type of arguments in a call.
Definition: CGCall.h:262
clang::CodeGen::CodeGenFunction::EmitBlock
void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false)
EmitBlock - Emit the given block.
Definition: CGStmt.cpp:544
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:116
clang::CodeGen::CGCXXABI::AddedStructorArgCounts::prefix
static AddedStructorArgCounts prefix(unsigned N)
Definition: CGCXXABI.h:338
clang::CodeGen::CGCXXABI::GetArrayCookieSize
virtual CharUnits GetArrayCookieSize(const CXXNewExpr *expr)
Returns the extra size required in order to store the array cookie for the given new-expression.
Definition: CGCXXABI.cpp:208
clang::CodeGen::CGCXXABI::EmitDynamicCastCall
virtual llvm::Value * EmitDynamicCastCall(CodeGenFunction &CGF, Address Value, QualType SrcRecordTy, QualType DestTy, QualType DestRecordTy, llvm::BasicBlock *CastEnd)=0
clang::CodeGen::CGCXXABI::getContext
ASTContext & getContext() const
Definition: CGCXXABI.h:83
clang::CodeGen::CGCXXABI::AddedStructorArgs::Prefix
SmallVector< Arg, 1 > Prefix
Definition: CGCXXABI.h:318
clang::CodeGen::CGCXXABI::getThisDecl
ImplicitParamDecl * getThisDecl(CodeGenFunction &CGF)
Definition: CGCXXABI.h:52
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:2083
clang::CXXMethodDecl
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:1968
clang::CodeGen::CGCXXABI::AddedStructorArgs::suffix
static AddedStructorArgs suffix(SmallVector< Arg, 1 > Args)
Definition: CGCXXABI.h:326
clang::CodeGen::CGCXXABI::getSrcArgforCopyCtor
virtual size_t getSrcArgforCopyCtor(const CXXConstructorDecl *, FunctionArgList &Args) const =0
Type
MatchType Type
Definition: ASTMatchFinder.cpp:71