1//===----- CGCXXABI.h - Interface to C++ ABIs -------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This provides an abstract class for C++ code generation. Concrete subclasses
11// of this implement code generation for specific C++ ABIs.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CLANG_LIB_CODEGEN_CGCXXABI_H
16#define LLVM_CLANG_LIB_CODEGEN_CGCXXABI_H
17
18#include "CodeGenFunction.h"
19#include "clang/Basic/LLVM.h"
20
21namespace llvm {
22class Constant;
23class Type;
24class Value;
25class CallInst;
26}
27
28namespace clang {
29class CastExpr;
30class CXXConstructorDecl;
31class CXXDestructorDecl;
32class CXXMethodDecl;
33class CXXRecordDecl;
34class FieldDecl;
35class MangleContext;
36
37namespace CodeGen {
38class CodeGenFunction;
39class CodeGenModule;
40struct CatchTypeInfo;
41
42/// \brief Implements C++ ABI-specific code generation functions.
43class CGCXXABI {
44protected:
45  CodeGenModule &CGM;
46  std::unique_ptr<MangleContext> MangleCtx;
47
48  CGCXXABI(CodeGenModule &CGM)
49    : CGM(CGM), MangleCtx(CGM.getContext().createMangleContext()) {}
50
51protected:
52  ImplicitParamDecl *getThisDecl(CodeGenFunction &CGF) {
53    return CGF.CXXABIThisDecl;
54  }
55  llvm::Value *getThisValue(CodeGenFunction &CGF) {
56    return CGF.CXXABIThisValue;
57  }
58  Address getThisAddress(CodeGenFunction &CGF) {
59    return Address(CGF.CXXABIThisValue, CGF.CXXABIThisAlignment);
60  }
61
62  /// Issue a diagnostic about unsupported features in the ABI.
63  void ErrorUnsupportedABI(CodeGenFunction &CGF, StringRef S);
64
65  /// Get a null value for unsupported member pointers.
66  llvm::Constant *GetBogusMemberPointer(QualType T);
67
68  ImplicitParamDecl *&getStructorImplicitParamDecl(CodeGenFunction &CGF) {
69    return CGF.CXXStructorImplicitParamDecl;
70  }
71  llvm::Value *&getStructorImplicitParamValue(CodeGenFunction &CGF) {
72    return CGF.CXXStructorImplicitParamValue;
73  }
74
75  /// Perform prolog initialization of the parameter variable suitable
76  /// for 'this' emitted by buildThisParam.
77  void EmitThisParam(CodeGenFunction &CGF);
78
79  ASTContext &getContext() const { return CGM.getContext(); }
80
81  virtual bool requiresArrayCookie(const CXXDeleteExpr *E, QualType eltType);
82  virtual bool requiresArrayCookie(const CXXNewExpr *E);
83
84  /// Determine whether there's something special about the rules of
85  /// the ABI tell us that 'this' is a complete object within the
86  /// given function.  Obvious common logic like being defined on a
87  /// final class will have been taken care of by the caller.
88  virtual bool isThisCompleteObject(GlobalDecl GD) const = 0;
89
90public:
91
92  virtual ~CGCXXABI();
93
94  /// Gets the mangle context.
95  MangleContext &getMangleContext() {
96    return *MangleCtx;
97  }
98
99  /// Returns true if the given constructor or destructor is one of the
100  /// kinds that the ABI says returns 'this' (only applies when called
101  /// non-virtually for destructors).
102  ///
103  /// There currently is no way to indicate if a destructor returns 'this'
104  /// when called virtually, and code generation does not support the case.
105  virtual bool HasThisReturn(GlobalDecl GD) const { return false; }
106
107  virtual bool hasMostDerivedReturn(GlobalDecl GD) const { return false; }
108
109  /// If the C++ ABI requires the given type be returned in a particular way,
110  /// this method sets RetAI and returns true.
111  virtual bool classifyReturnType(CGFunctionInfo &FI) const = 0;
112
113  /// Specify how one should pass an argument of a record type.
114  enum RecordArgABI {
115    /// Pass it using the normal C aggregate rules for the ABI, potentially
116    /// introducing extra copies and passing some or all of it in registers.
117    RAA_Default = 0,
118
119    /// Pass it on the stack using its defined layout.  The argument must be
120    /// evaluated directly into the correct stack position in the arguments area,
121    /// and the call machinery must not move it or introduce extra copies.
122    RAA_DirectInMemory,
123
124    /// Pass it as a pointer to temporary memory.
125    RAA_Indirect
126  };
127
128  /// Returns true if C++ allows us to copy the memory of an object of type RD
129  /// when it is passed as an argument.
130  bool canCopyArgument(const CXXRecordDecl *RD) const;
131
132  /// Returns how an argument of the given record type should be passed.
133  virtual RecordArgABI getRecordArgABI(const CXXRecordDecl *RD) const = 0;
134
135  /// Returns true if the implicit 'sret' parameter comes after the implicit
136  /// 'this' parameter of C++ instance methods.
137  virtual bool isSRetParameterAfterThis() const { return false; }
138
139  /// Find the LLVM type used to represent the given member pointer
140  /// type.
141  virtual llvm::Type *
142  ConvertMemberPointerType(const MemberPointerType *MPT);
143
144  /// Load a member function from an object and a member function
145  /// pointer.  Apply the this-adjustment and set 'This' to the
146  /// adjusted value.
147  virtual llvm::Value *EmitLoadOfMemberFunctionPointer(
148      CodeGenFunction &CGF, const Expr *E, Address This,
149      llvm::Value *&ThisPtrForCall, llvm::Value *MemPtr,
150      const MemberPointerType *MPT);
151
152  /// Calculate an l-value from an object and a data member pointer.
153  virtual llvm::Value *
154  EmitMemberDataPointerAddress(CodeGenFunction &CGF, const Expr *E,
155                               Address Base, llvm::Value *MemPtr,
156                               const MemberPointerType *MPT);
157
158  /// Perform a derived-to-base, base-to-derived, or bitcast member
159  /// pointer conversion.
160  virtual llvm::Value *EmitMemberPointerConversion(CodeGenFunction &CGF,
161                                                   const CastExpr *E,
162                                                   llvm::Value *Src);
163
164  /// Perform a derived-to-base, base-to-derived, or bitcast member
165  /// pointer conversion on a constant value.
166  virtual llvm::Constant *EmitMemberPointerConversion(const CastExpr *E,
167                                                      llvm::Constant *Src);
168
169  /// Return true if the given member pointer can be zero-initialized
170  /// (in the C++ sense) with an LLVM zeroinitializer.
171  virtual bool isZeroInitializable(const MemberPointerType *MPT);
172
173  /// Return whether or not a member pointers type is convertible to an IR type.
174  virtual bool isMemberPointerConvertible(const MemberPointerType *MPT) const {
175    return true;
176  }
177
178  /// Create a null member pointer of the given type.
179  virtual llvm::Constant *EmitNullMemberPointer(const MemberPointerType *MPT);
180
181  /// Create a member pointer for the given method.
182  virtual llvm::Constant *EmitMemberFunctionPointer(const CXXMethodDecl *MD);
183
184  /// Create a member pointer for the given field.
185  virtual llvm::Constant *EmitMemberDataPointer(const MemberPointerType *MPT,
186                                                CharUnits offset);
187
188  /// Create a member pointer for the given member pointer constant.
189  virtual llvm::Constant *EmitMemberPointer(const APValue &MP, QualType MPT);
190
191  /// Emit a comparison between two member pointers.  Returns an i1.
192  virtual llvm::Value *
193  EmitMemberPointerComparison(CodeGenFunction &CGF,
194                              llvm::Value *L,
195                              llvm::Value *R,
196                              const MemberPointerType *MPT,
197                              bool Inequality);
198
199  /// Determine if a member pointer is non-null.  Returns an i1.
200  virtual llvm::Value *
201  EmitMemberPointerIsNotNull(CodeGenFunction &CGF,
202                             llvm::Value *MemPtr,
203                             const MemberPointerType *MPT);
204
205protected:
206  /// A utility method for computing the offset required for the given
207  /// base-to-derived or derived-to-base member-pointer conversion.
208  /// Does not handle virtual conversions (in case we ever fully
209  /// support an ABI that allows this).  Returns null if no adjustment
210  /// is required.
211  llvm::Constant *getMemberPointerAdjustment(const CastExpr *E);
212
213  /// \brief Computes the non-virtual adjustment needed for a member pointer
214  /// conversion along an inheritance path stored in an APValue.  Unlike
215  /// getMemberPointerAdjustment(), the adjustment can be negative if the path
216  /// is from a derived type to a base type.
217  CharUnits getMemberPointerPathAdjustment(const APValue &MP);
218
219public:
220  virtual void emitVirtualObjectDelete(CodeGenFunction &CGF,
221                                       const CXXDeleteExpr *DE,
222                                       Address Ptr, QualType ElementType,
223                                       const CXXDestructorDecl *Dtor) = 0;
224  virtual void emitRethrow(CodeGenFunction &CGF, bool isNoReturn) = 0;
225  virtual void emitThrow(CodeGenFunction &CGF, const CXXThrowExpr *E) = 0;
226  virtual llvm::GlobalVariable *getThrowInfo(QualType T) { return nullptr; }
227
228  /// \brief Determine whether it's possible to emit a vtable for \p RD, even
229  /// though we do not know that the vtable has been marked as used by semantic
230  /// analysis.
231  virtual bool canSpeculativelyEmitVTable(const CXXRecordDecl *RD) const = 0;
232
233  virtual void emitBeginCatch(CodeGenFunction &CGF, const CXXCatchStmt *C) = 0;
234
235  virtual llvm::CallInst *
236  emitTerminateForUnexpectedException(CodeGenFunction &CGF,
237                                      llvm::Value *Exn);
238
239  virtual llvm::Constant *getAddrOfRTTIDescriptor(QualType Ty) = 0;
240  virtual CatchTypeInfo
241  getAddrOfCXXCatchHandlerType(QualType Ty, QualType CatchHandlerType) = 0;
242  virtual CatchTypeInfo getCatchAllTypeInfo();
243
244  virtual bool shouldTypeidBeNullChecked(bool IsDeref,
245                                         QualType SrcRecordTy) = 0;
246  virtual void EmitBadTypeidCall(CodeGenFunction &CGF) = 0;
247  virtual llvm::Value *EmitTypeid(CodeGenFunction &CGF, QualType SrcRecordTy,
248                                  Address ThisPtr,
249                                  llvm::Type *StdTypeInfoPtrTy) = 0;
250
251  virtual bool shouldDynamicCastCallBeNullChecked(bool SrcIsPtr,
252                                                  QualType SrcRecordTy) = 0;
253
254  virtual llvm::Value *
255  EmitDynamicCastCall(CodeGenFunction &CGF, Address Value,
256                      QualType SrcRecordTy, QualType DestTy,
257                      QualType DestRecordTy, llvm::BasicBlock *CastEnd) = 0;
258
259  virtual llvm::Value *EmitDynamicCastToVoid(CodeGenFunction &CGF,
260                                             Address Value,
261                                             QualType SrcRecordTy,
262                                             QualType DestTy) = 0;
263
264  virtual bool EmitBadCastCall(CodeGenFunction &CGF) = 0;
265
266  virtual llvm::Value *GetVirtualBaseClassOffset(CodeGenFunction &CGF,
267                                                 Address This,
268                                                 const CXXRecordDecl *ClassDecl,
269                                        const CXXRecordDecl *BaseClassDecl) = 0;
270
271  virtual llvm::BasicBlock *EmitCtorCompleteObjectHandler(CodeGenFunction &CGF,
272                                                          const CXXRecordDecl *RD);
273
274  /// Emit the code to initialize hidden members required
275  /// to handle virtual inheritance, if needed by the ABI.
276  virtual void
277  initializeHiddenVirtualInheritanceMembers(CodeGenFunction &CGF,
278                                            const CXXRecordDecl *RD) {}
279
280  /// Emit constructor variants required by this ABI.
281  virtual void EmitCXXConstructors(const CXXConstructorDecl *D) = 0;
282
283  /// Build the signature of the given constructor or destructor variant by
284  /// adding any required parameters.  For convenience, ArgTys has been
285  /// initialized with the type of 'this'.
286  virtual void buildStructorSignature(const CXXMethodDecl *MD, StructorType T,
287                                      SmallVectorImpl<CanQualType> &ArgTys) = 0;
288
289  /// Returns true if the given destructor type should be emitted as a linkonce
290  /// delegating thunk, regardless of whether the dtor is defined in this TU or
291  /// not.
292  virtual bool useThunkForDtorVariant(const CXXDestructorDecl *Dtor,
293                                      CXXDtorType DT) const = 0;
294
295  /// Emit destructor variants required by this ABI.
296  virtual void EmitCXXDestructors(const CXXDestructorDecl *D) = 0;
297
298  /// Get the type of the implicit "this" parameter used by a method. May return
299  /// zero if no specific type is applicable, e.g. if the ABI expects the "this"
300  /// parameter to point to some artificial offset in a complete object due to
301  /// vbases being reordered.
302  virtual const CXXRecordDecl *
303  getThisArgumentTypeForMethod(const CXXMethodDecl *MD) {
304    return MD->getParent();
305  }
306
307  /// Perform ABI-specific "this" argument adjustment required prior to
308  /// a call of a virtual function.
309  /// The "VirtualCall" argument is true iff the call itself is virtual.
310  virtual Address
311  adjustThisArgumentForVirtualFunctionCall(CodeGenFunction &CGF, GlobalDecl GD,
312                                           Address This, bool VirtualCall) {
313    return This;
314  }
315
316  /// Build a parameter variable suitable for 'this'.
317  void buildThisParam(CodeGenFunction &CGF, FunctionArgList &Params);
318
319  /// Insert any ABI-specific implicit parameters into the parameter list for a
320  /// function.  This generally involves extra data for constructors and
321  /// destructors.
322  ///
323  /// ABIs may also choose to override the return type, which has been
324  /// initialized with the type of 'this' if HasThisReturn(CGF.CurGD) is true or
325  /// the formal return type of the function otherwise.
326  virtual void addImplicitStructorParams(CodeGenFunction &CGF, QualType &ResTy,
327                                         FunctionArgList &Params) = 0;
328
329  /// Perform ABI-specific "this" parameter adjustment in a virtual function
330  /// prologue.
331  virtual llvm::Value *adjustThisParameterInVirtualFunctionPrologue(
332      CodeGenFunction &CGF, GlobalDecl GD, llvm::Value *This) {
333    return This;
334  }
335
336  /// Emit the ABI-specific prolog for the function.
337  virtual void EmitInstanceFunctionProlog(CodeGenFunction &CGF) = 0;
338
339  /// Add any ABI-specific implicit arguments needed to call a constructor.
340  ///
341  /// \return The number of args added to the call, which is typically zero or
342  /// one.
343  virtual unsigned
344  addImplicitConstructorArgs(CodeGenFunction &CGF, const CXXConstructorDecl *D,
345                             CXXCtorType Type, bool ForVirtualBase,
346                             bool Delegating, CallArgList &Args) = 0;
347
348  /// Emit the destructor call.
349  virtual void EmitDestructorCall(CodeGenFunction &CGF,
350                                  const CXXDestructorDecl *DD, CXXDtorType Type,
351                                  bool ForVirtualBase, bool Delegating,
352                                  Address This) = 0;
353
354  /// Emits the VTable definitions required for the given record type.
355  virtual void emitVTableDefinitions(CodeGenVTables &CGVT,
356                                     const CXXRecordDecl *RD) = 0;
357
358  /// Checks if ABI requires extra virtual offset for vtable field.
359  virtual bool
360  isVirtualOffsetNeededForVTableField(CodeGenFunction &CGF,
361                                      CodeGenFunction::VPtr Vptr) = 0;
362
363  /// Checks if ABI requires to initilize vptrs for given dynamic class.
364  virtual bool doStructorsInitializeVPtrs(const CXXRecordDecl *VTableClass) = 0;
365
366  /// Get the address point of the vtable for the given base subobject.
367  virtual llvm::Constant *
368  getVTableAddressPoint(BaseSubobject Base,
369                        const CXXRecordDecl *VTableClass) = 0;
370
371  /// Get the address point of the vtable for the given base subobject while
372  /// building a constructor or a destructor.
373  virtual llvm::Value *
374  getVTableAddressPointInStructor(CodeGenFunction &CGF, const CXXRecordDecl *RD,
375                                  BaseSubobject Base,
376                                  const CXXRecordDecl *NearestVBase) = 0;
377
378  /// Get the address point of the vtable for the given base subobject while
379  /// building a constexpr.
380  virtual llvm::Constant *
381  getVTableAddressPointForConstExpr(BaseSubobject Base,
382                                    const CXXRecordDecl *VTableClass) = 0;
383
384  /// Get the address of the vtable for the given record decl which should be
385  /// used for the vptr at the given offset in RD.
386  virtual llvm::GlobalVariable *getAddrOfVTable(const CXXRecordDecl *RD,
387                                                CharUnits VPtrOffset) = 0;
388
389  /// Build a virtual function pointer in the ABI-specific way.
390  virtual llvm::Value *getVirtualFunctionPointer(CodeGenFunction &CGF,
391                                                 GlobalDecl GD,
392                                                 Address This,
393                                                 llvm::Type *Ty,
394                                                 SourceLocation Loc) = 0;
395
396  /// Emit the ABI-specific virtual destructor call.
397  virtual llvm::Value *
398  EmitVirtualDestructorCall(CodeGenFunction &CGF, const CXXDestructorDecl *Dtor,
399                            CXXDtorType DtorType, Address This,
400                            const CXXMemberCallExpr *CE) = 0;
401
402  virtual void adjustCallArgsForDestructorThunk(CodeGenFunction &CGF,
403                                                GlobalDecl GD,
404                                                CallArgList &CallArgs) {}
405
406  /// Emit any tables needed to implement virtual inheritance.  For Itanium,
407  /// this emits virtual table tables.  For the MSVC++ ABI, this emits virtual
408  /// base tables.
409  virtual void emitVirtualInheritanceTables(const CXXRecordDecl *RD) = 0;
410
411  virtual void setThunkLinkage(llvm::Function *Thunk, bool ForVTable,
412                               GlobalDecl GD, bool ReturnAdjustment) = 0;
413
414  virtual llvm::Value *performThisAdjustment(CodeGenFunction &CGF,
415                                             Address This,
416                                             const ThisAdjustment &TA) = 0;
417
418  virtual llvm::Value *performReturnAdjustment(CodeGenFunction &CGF,
419                                               Address Ret,
420                                               const ReturnAdjustment &RA) = 0;
421
422  virtual void EmitReturnFromThunk(CodeGenFunction &CGF,
423                                   RValue RV, QualType ResultType);
424
425  virtual size_t getSrcArgforCopyCtor(const CXXConstructorDecl *,
426                                      FunctionArgList &Args) const = 0;
427
428  /// Gets the offsets of all the virtual base pointers in a given class.
429  virtual std::vector<CharUnits> getVBPtrOffsets(const CXXRecordDecl *RD);
430
431  /// Gets the pure virtual member call function.
432  virtual StringRef GetPureVirtualCallName() = 0;
433
434  /// Gets the deleted virtual member call name.
435  virtual StringRef GetDeletedVirtualCallName() = 0;
436
437  /**************************** Array cookies ******************************/
438
439  /// Returns the extra size required in order to store the array
440  /// cookie for the given new-expression.  May return 0 to indicate that no
441  /// array cookie is required.
442  ///
443  /// Several cases are filtered out before this method is called:
444  ///   - non-array allocations never need a cookie
445  ///   - calls to \::operator new(size_t, void*) never need a cookie
446  ///
447  /// \param expr - the new-expression being allocated.
448  virtual CharUnits GetArrayCookieSize(const CXXNewExpr *expr);
449
450  /// Initialize the array cookie for the given allocation.
451  ///
452  /// \param NewPtr - a char* which is the presumed-non-null
453  ///   return value of the allocation function
454  /// \param NumElements - the computed number of elements,
455  ///   potentially collapsed from the multidimensional array case;
456  ///   always a size_t
457  /// \param ElementType - the base element allocated type,
458  ///   i.e. the allocated type after stripping all array types
459  virtual Address InitializeArrayCookie(CodeGenFunction &CGF,
460                                        Address NewPtr,
461                                        llvm::Value *NumElements,
462                                        const CXXNewExpr *expr,
463                                        QualType ElementType);
464
465  /// Reads the array cookie associated with the given pointer,
466  /// if it has one.
467  ///
468  /// \param Ptr - a pointer to the first element in the array
469  /// \param ElementType - the base element type of elements of the array
470  /// \param NumElements - an out parameter which will be initialized
471  ///   with the number of elements allocated, or zero if there is no
472  ///   cookie
473  /// \param AllocPtr - an out parameter which will be initialized
474  ///   with a char* pointing to the address returned by the allocation
475  ///   function
476  /// \param CookieSize - an out parameter which will be initialized
477  ///   with the size of the cookie, or zero if there is no cookie
478  virtual void ReadArrayCookie(CodeGenFunction &CGF, Address Ptr,
479                               const CXXDeleteExpr *expr,
480                               QualType ElementType, llvm::Value *&NumElements,
481                               llvm::Value *&AllocPtr, CharUnits &CookieSize);
482
483  /// Return whether the given global decl needs a VTT parameter.
484  virtual bool NeedsVTTParameter(GlobalDecl GD);
485
486protected:
487  /// Returns the extra size required in order to store the array
488  /// cookie for the given type.  Assumes that an array cookie is
489  /// required.
490  virtual CharUnits getArrayCookieSizeImpl(QualType elementType);
491
492  /// Reads the array cookie for an allocation which is known to have one.
493  /// This is called by the standard implementation of ReadArrayCookie.
494  ///
495  /// \param ptr - a pointer to the allocation made for an array, as a char*
496  /// \param cookieSize - the computed cookie size of an array
497  ///
498  /// Other parameters are as above.
499  ///
500  /// \return a size_t
501  virtual llvm::Value *readArrayCookieImpl(CodeGenFunction &IGF, Address ptr,
502                                           CharUnits cookieSize);
503
504public:
505
506  /*************************** Static local guards ****************************/
507
508  /// Emits the guarded initializer and destructor setup for the given
509  /// variable, given that it couldn't be emitted as a constant.
510  /// If \p PerformInit is false, the initialization has been folded to a
511  /// constant and should not be performed.
512  ///
513  /// The variable may be:
514  ///   - a static local variable
515  ///   - a static data member of a class template instantiation
516  virtual void EmitGuardedInit(CodeGenFunction &CGF, const VarDecl &D,
517                               llvm::GlobalVariable *DeclPtr,
518                               bool PerformInit) = 0;
519
520  /// Emit code to force the execution of a destructor during global
521  /// teardown.  The default implementation of this uses atexit.
522  ///
523  /// \param Dtor - a function taking a single pointer argument
524  /// \param Addr - a pointer to pass to the destructor function.
525  virtual void registerGlobalDtor(CodeGenFunction &CGF, const VarDecl &D,
526                                  llvm::Constant *Dtor,
527                                  llvm::Constant *Addr) = 0;
528
529  /*************************** thread_local initialization ********************/
530
531  /// Emits ABI-required functions necessary to initialize thread_local
532  /// variables in this translation unit.
533  ///
534  /// \param CXXThreadLocals - The thread_local declarations in this translation
535  ///        unit.
536  /// \param CXXThreadLocalInits - If this translation unit contains any
537  ///        non-constant initialization or non-trivial destruction for
538  ///        thread_local variables, a list of functions to perform the
539  ///        initialization.
540  virtual void EmitThreadLocalInitFuncs(
541      CodeGenModule &CGM, ArrayRef<const VarDecl *> CXXThreadLocals,
542      ArrayRef<llvm::Function *> CXXThreadLocalInits,
543      ArrayRef<const VarDecl *> CXXThreadLocalInitVars) = 0;
544
545  // Determine if references to thread_local global variables can be made
546  // directly or require access through a thread wrapper function.
547  virtual bool usesThreadWrapperFunction() const = 0;
548
549  /// Emit a reference to a non-local thread_local variable (including
550  /// triggering the initialization of all thread_local variables in its
551  /// translation unit).
552  virtual LValue EmitThreadLocalVarDeclLValue(CodeGenFunction &CGF,
553                                              const VarDecl *VD,
554                                              QualType LValType) = 0;
555
556  /// Emit a single constructor/destructor with the given type from a C++
557  /// constructor Decl.
558  virtual void emitCXXStructor(const CXXMethodDecl *MD, StructorType Type) = 0;
559};
560
561// Create an instance of a C++ ABI class:
562
563/// Creates an Itanium-family ABI.
564CGCXXABI *CreateItaniumCXXABI(CodeGenModule &CGM);
565
566/// Creates a Microsoft-family ABI.
567CGCXXABI *CreateMicrosoftCXXABI(CodeGenModule &CGM);
568
569}
570}
571
572#endif
573