1c3926645d70842eae22641df1bf69da457a0ff11Charles Davis//===--- MicrosoftCXXABI.cpp - Emit LLVM Code from ASTs for a Module ------===// 2c3926645d70842eae22641df1bf69da457a0ff11Charles Davis// 3c3926645d70842eae22641df1bf69da457a0ff11Charles Davis// The LLVM Compiler Infrastructure 4c3926645d70842eae22641df1bf69da457a0ff11Charles Davis// 5c3926645d70842eae22641df1bf69da457a0ff11Charles Davis// This file is distributed under the University of Illinois Open Source 6c3926645d70842eae22641df1bf69da457a0ff11Charles Davis// License. See LICENSE.TXT for details. 7c3926645d70842eae22641df1bf69da457a0ff11Charles Davis// 8c3926645d70842eae22641df1bf69da457a0ff11Charles Davis//===----------------------------------------------------------------------===// 9c3926645d70842eae22641df1bf69da457a0ff11Charles Davis// 10fc8f0e14ad142ed811e90fbd9a30e419e301c717Chris Lattner// This provides C++ code generation targeting the Microsoft Visual C++ ABI. 11c3926645d70842eae22641df1bf69da457a0ff11Charles Davis// The class in this file generates structures that follow the Microsoft 12c3926645d70842eae22641df1bf69da457a0ff11Charles Davis// Visual C++ ABI, which is actually not very well documented at all outside 13c3926645d70842eae22641df1bf69da457a0ff11Charles Davis// of Microsoft. 14c3926645d70842eae22641df1bf69da457a0ff11Charles Davis// 15c3926645d70842eae22641df1bf69da457a0ff11Charles Davis//===----------------------------------------------------------------------===// 16c3926645d70842eae22641df1bf69da457a0ff11Charles Davis 17c3926645d70842eae22641df1bf69da457a0ff11Charles Davis#include "CGCXXABI.h" 189063302a82423cb83f002257a416741850739a70Reid Kleckner#include "CGVTables.h" 19651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#include "CodeGenModule.h" 20c3926645d70842eae22641df1bf69da457a0ff11Charles Davis#include "clang/AST/Decl.h" 21c3926645d70842eae22641df1bf69da457a0ff11Charles Davis#include "clang/AST/DeclCXX.h" 22635de28950ef84ae26308ff734e778bad1ddde92Timur Iskhodzhanov#include "clang/AST/VTableBuilder.h" 23ef8225444452a1486bd721f3285301fe84643b00Stephen Hines#include "llvm/ADT/StringExtras.h" 24a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov#include "llvm/ADT/StringSet.h" 25ef8225444452a1486bd721f3285301fe84643b00Stephen Hines#include "llvm/IR/CallSite.h" 26c3926645d70842eae22641df1bf69da457a0ff11Charles Davis 27c3926645d70842eae22641df1bf69da457a0ff11Charles Davisusing namespace clang; 28c3926645d70842eae22641df1bf69da457a0ff11Charles Davisusing namespace CodeGen; 29c3926645d70842eae22641df1bf69da457a0ff11Charles Davis 30c3926645d70842eae22641df1bf69da457a0ff11Charles Davisnamespace { 31c3926645d70842eae22641df1bf69da457a0ff11Charles Davis 32651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/// Holds all the vbtable globals for a given class. 33651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesstruct VBTableGlobals { 34651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const VPtrInfoVector *VBTables; 35651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines SmallVector<llvm::GlobalVariable *, 2> Globals; 36651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines}; 37651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 38071cc7deffad608165b1ddd5263e8bf181861520Charles Davisclass MicrosoftCXXABI : public CGCXXABI { 39c3926645d70842eae22641df1bf69da457a0ff11Charles Davispublic: 40ef8225444452a1486bd721f3285301fe84643b00Stephen Hines MicrosoftCXXABI(CodeGenModule &CGM) 41ef8225444452a1486bd721f3285301fe84643b00Stephen Hines : CGCXXABI(CGM), BaseClassDescriptorType(nullptr), 42ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ClassHierarchyDescriptorType(nullptr), 43ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CompleteObjectLocatorType(nullptr) {} 444c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall 45651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool HasThisReturn(GlobalDecl GD) const override; 463b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin 476bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines bool classifyReturnType(CGFunctionInfo &FI) const override; 48ed23bdf69dd63e4fd01c02b12a13d1e6cbff9c2fTimur Iskhodzhanov 496bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines RecordArgABI getRecordArgABI(const CXXRecordDecl *RD) const override; 506bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 516bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines bool isSRetParameterAfterThis() const override { return true; } 52ed23bdf69dd63e4fd01c02b12a13d1e6cbff9c2fTimur Iskhodzhanov 53651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines StringRef GetPureVirtualCallName() override { return "_purecall"; } 542eb9a959d24ad757a82ecab61f343635ad67749aDavid Blaikie // No known support for deleted functions in MSVC yet, so this choice is 552eb9a959d24ad757a82ecab61f343635ad67749aDavid Blaikie // arbitrary. 56651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines StringRef GetDeletedVirtualCallName() override { return "_purecall"; } 57285baac67d722beb6854f5faa45ee1aa62a7ce92Joao Matos 586bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines bool isInlineInitializedStaticDataMemberLinkOnce() override { return true; } 590cbb3ed856d7b9059c6b52cdeb38db2a5d1a3a66Bill Wendling 60ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall llvm::Value *adjustToCompleteObject(CodeGenFunction &CGF, 61ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall llvm::Value *ptr, 62651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines QualType type) override; 63ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall 64ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalVariable *getMSCompleteObjectLocator(const CXXRecordDecl *RD, 65ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const VPtrInfo *Info); 66ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 67ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *getAddrOfRTTIDescriptor(QualType Ty) override; 68ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 69ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool shouldTypeidBeNullChecked(bool IsDeref, QualType SrcRecordTy) override; 70ef8225444452a1486bd721f3285301fe84643b00Stephen Hines void EmitBadTypeidCall(CodeGenFunction &CGF) override; 71ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *EmitTypeid(CodeGenFunction &CGF, QualType SrcRecordTy, 72ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *ThisPtr, 73ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Type *StdTypeInfoPtrTy) override; 74ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 75ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool shouldDynamicCastCallBeNullChecked(bool SrcIsPtr, 76ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType SrcRecordTy) override; 77ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 78ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *EmitDynamicCastCall(CodeGenFunction &CGF, llvm::Value *Value, 79ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType SrcRecordTy, QualType DestTy, 80ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType DestRecordTy, 81ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::BasicBlock *CastEnd) override; 82ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 83ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *EmitDynamicCastToVoid(CodeGenFunction &CGF, llvm::Value *Value, 84ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType SrcRecordTy, 85ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType DestTy) override; 86ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 87ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool EmitBadCastCall(CodeGenFunction &CGF) override; 88ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 89651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value * 90651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines GetVirtualBaseClassOffset(CodeGenFunction &CGF, llvm::Value *This, 91651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *ClassDecl, 92651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *BaseClassDecl) override; 93b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner 944c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall void BuildConstructorSignature(const CXXConstructorDecl *Ctor, 95651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CXXCtorType Type, CanQualType &ResTy, 96651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines SmallVectorImpl<CanQualType> &ArgTys) override; 974c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall 98651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::BasicBlock * 99651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines EmitCtorCompleteObjectHandler(CodeGenFunction &CGF, 100651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD) override; 1011d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov 1025bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov void initializeHiddenVirtualInheritanceMembers(CodeGenFunction &CGF, 103651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD) override; 1045bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov 105651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines void EmitCXXConstructors(const CXXConstructorDecl *D) override; 106bb1b797d2e432293563747bd9704b22cf0787061Timur Iskhodzhanov 107a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // Background on MSVC destructors 108a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // ============================== 109a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // 110a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // Both Itanium and MSVC ABIs have destructor variants. The variant names 111a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // roughly correspond in the following way: 112a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // Itanium Microsoft 113a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // Base -> no name, just ~Class 114a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // Complete -> vbase destructor 115a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // Deleting -> scalar deleting destructor 116a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // vector deleting destructor 117a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // 118a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // The base and complete destructors are the same as in Itanium, although the 119a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // complete destructor does not accept a VTT parameter when there are virtual 120a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // bases. A separate mechanism involving vtordisps is used to ensure that 121a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // virtual methods of destroyed subobjects are not called. 122a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // 123a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // The deleting destructors accept an i32 bitfield as a second parameter. Bit 124a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // 1 indicates if the memory should be deleted. Bit 2 indicates if the this 125a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // pointer points to an array. The scalar deleting destructor assumes that 126a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // bit 2 is zero, and therefore does not contain a loop. 127a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // 128a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // For virtual destructors, only one entry is reserved in the vftable, and it 129a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // always points to the vector deleting destructor. The vector deleting 130a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // destructor is the most general, so it can be used to destroy objects in 131a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // place, delete single heap objects, or delete arrays. 132a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // 133a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // A TU defining a non-inline destructor is only guaranteed to emit a base 134a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // destructor, and all of the other variants are emitted on an as-needed basis 135a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // in COMDATs. Because a non-base destructor can be emitted in a TU that 136a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // lacks a definition for the destructor, non-base destructors must always 137a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // delegate to or alias the base destructor. 138a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner 139a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner void BuildDestructorSignature(const CXXDestructorDecl *Dtor, 1404c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall CXXDtorType Type, 1414c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall CanQualType &ResTy, 142651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines SmallVectorImpl<CanQualType> &ArgTys) override; 1434c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall 144a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner /// Non-base dtors should be emitted as delegating thunks in this ABI. 145a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner bool useThunkForDtorVariant(const CXXDestructorDecl *Dtor, 146651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CXXDtorType DT) const override { 147a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner return DT != Dtor_Base; 148a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner } 149a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner 150651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines void EmitCXXDestructors(const CXXDestructorDecl *D) override; 151a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner 152651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl * 153651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines getThisArgumentTypeForMethod(const CXXMethodDecl *MD) override { 1548f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov MD = MD->getCanonicalDecl(); 1558f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov if (MD->isVirtual() && !isa<CXXDestructorDecl>(MD)) { 1565f0db587078b5af32fc9ac41fe4276b80918fd8dTimur Iskhodzhanov MicrosoftVTableContext::MethodVFTableLocation ML = 1575f0db587078b5af32fc9ac41fe4276b80918fd8dTimur Iskhodzhanov CGM.getMicrosoftVTableContext().getMethodVFTableLocation(MD); 1588f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov // The vbases might be ordered differently in the final overrider object 1598f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov // and the complete object, so the "this" argument may sometimes point to 1608f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov // memory that has no particular type (e.g. past the complete object). 1618f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov // In this case, we just use a generic pointer type. 1628f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov // FIXME: might want to have a more precise type in the non-virtual 1638f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov // multiple inheritance case. 16440aa366f994f7b2c103e94f903a34226b4b8f06bTimur Iskhodzhanov if (ML.VBase || !ML.VFPtrOffset.isZero()) 1656bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return nullptr; 1668f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov } 1678f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov return MD->getParent(); 1688f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov } 1698f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 170651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value * 171651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines adjustThisArgumentForVirtualFunctionCall(CodeGenFunction &CGF, GlobalDecl GD, 172651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *This, 173651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool VirtualCall) override; 1748f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 175651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines void addImplicitStructorParams(CodeGenFunction &CGF, QualType &ResTy, 176651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines FunctionArgList &Params) override; 1774c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall 1788f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov llvm::Value *adjustThisParameterInVirtualFunctionPrologue( 179651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CodeGenFunction &CGF, GlobalDecl GD, llvm::Value *This) override; 1808f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 181651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines void EmitInstanceFunctionProlog(CodeGenFunction &CGF) override; 182fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall 183651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines unsigned addImplicitConstructorArgs(CodeGenFunction &CGF, 184651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXConstructorDecl *D, 185651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CXXCtorType Type, bool ForVirtualBase, 186651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool Delegating, 187651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CallArgList &Args) override; 1888f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 189651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines void EmitDestructorCall(CodeGenFunction &CGF, const CXXDestructorDecl *DD, 190651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CXXDtorType Type, bool ForVirtualBase, 191651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool Delegating, llvm::Value *This) override; 192651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 193651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines void emitVTableDefinitions(CodeGenVTables &CGVT, 194651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD) override; 195a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 196a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov llvm::Value *getVTableAddressPointInStructor( 197a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov CodeGenFunction &CGF, const CXXRecordDecl *VTableClass, 198a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov BaseSubobject Base, const CXXRecordDecl *NearestVBase, 199651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool &NeedsVirtualOffset) override; 200a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 201a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov llvm::Constant * 202a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov getVTableAddressPointForConstExpr(BaseSubobject Base, 203651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *VTableClass) override; 204a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 205a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov llvm::GlobalVariable *getAddrOfVTable(const CXXRecordDecl *RD, 206651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits VPtrOffset) override; 207a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 2088f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov llvm::Value *getVirtualFunctionPointer(CodeGenFunction &CGF, GlobalDecl GD, 209651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *This, 210651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Type *Ty) override; 2118f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 2123b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin void EmitVirtualDestructorCall(CodeGenFunction &CGF, 2133b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin const CXXDestructorDecl *Dtor, 2143b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin CXXDtorType DtorType, SourceLocation CallLoc, 215651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *This) override; 2160f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov 2172cb17a06befb61b1434aaa991652fea4338c95d7Timur Iskhodzhanov void adjustCallArgsForDestructorThunk(CodeGenFunction &CGF, GlobalDecl GD, 218651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CallArgList &CallArgs) override { 2192cb17a06befb61b1434aaa991652fea4338c95d7Timur Iskhodzhanov assert(GD.getDtorType() == Dtor_Deleting && 2202cb17a06befb61b1434aaa991652fea4338c95d7Timur Iskhodzhanov "Only deleting destructor thunks are available in this ABI"); 2212cb17a06befb61b1434aaa991652fea4338c95d7Timur Iskhodzhanov CallArgs.add(RValue::get(getStructorImplicitParamValue(CGF)), 2222cb17a06befb61b1434aaa991652fea4338c95d7Timur Iskhodzhanov CGM.getContext().IntTy); 2232cb17a06befb61b1434aaa991652fea4338c95d7Timur Iskhodzhanov } 2242cb17a06befb61b1434aaa991652fea4338c95d7Timur Iskhodzhanov 225651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines void emitVirtualInheritanceTables(const CXXRecordDecl *RD) override; 2269063302a82423cb83f002257a416741850739a70Reid Kleckner 227651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::GlobalVariable * 228651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines getAddrOfVBTable(const VPtrInfo &VBT, const CXXRecordDecl *RD, 229651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::GlobalVariable::LinkageTypes Linkage); 230651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 231651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines void emitVBTableDefinition(const VPtrInfo &VBT, const CXXRecordDecl *RD, 232651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::GlobalVariable *GV) const; 233651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 234ef8225444452a1486bd721f3285301fe84643b00Stephen Hines void setThunkLinkage(llvm::Function *Thunk, bool ForVTable, 235ef8225444452a1486bd721f3285301fe84643b00Stephen Hines GlobalDecl GD, bool ReturnAdjustment) override { 236ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Never dllimport/dllexport thunks. 237ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Thunk->setDLLStorageClass(llvm::GlobalValue::DefaultStorageClass); 238ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 239ef8225444452a1486bd721f3285301fe84643b00Stephen Hines GVALinkage Linkage = 240ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getContext().GetGVALinkageForFunction(cast<FunctionDecl>(GD.getDecl())); 241ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 242ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (Linkage == GVA_Internal) 243ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Thunk->setLinkage(llvm::GlobalValue::InternalLinkage); 244ef8225444452a1486bd721f3285301fe84643b00Stephen Hines else if (ReturnAdjustment) 245ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Thunk->setLinkage(llvm::GlobalValue::WeakODRLinkage); 246ef8225444452a1486bd721f3285301fe84643b00Stephen Hines else 247ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Thunk->setLinkage(llvm::GlobalValue::LinkOnceODRLinkage); 2482cb17a06befb61b1434aaa991652fea4338c95d7Timur Iskhodzhanov } 2492cb17a06befb61b1434aaa991652fea4338c95d7Timur Iskhodzhanov 250c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov llvm::Value *performThisAdjustment(CodeGenFunction &CGF, llvm::Value *This, 251651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const ThisAdjustment &TA) override; 252c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 253c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov llvm::Value *performReturnAdjustment(CodeGenFunction &CGF, llvm::Value *Ret, 254651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const ReturnAdjustment &RA) override; 255c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 25620bb175cb8ae5844034828db094fb948c0e3454aJohn McCall void EmitGuardedInit(CodeGenFunction &CGF, const VarDecl &D, 25720bb175cb8ae5844034828db094fb948c0e3454aJohn McCall llvm::GlobalVariable *DeclPtr, 258651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool PerformInit) override; 25920bb175cb8ae5844034828db094fb948c0e3454aJohn McCall 260fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // ==== Notes on array cookies ========= 261fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // 262fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // MSVC seems to only use cookies when the class has a destructor; a 263fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // two-argument usual array deallocation function isn't sufficient. 264fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // 265fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // For example, this code prints "100" and "1": 266fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // struct A { 267fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // char x; 268fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // void *operator new[](size_t sz) { 269fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // printf("%u\n", sz); 270fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // return malloc(sz); 271fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // } 272fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // void operator delete[](void *p, size_t sz) { 273fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // printf("%u\n", sz); 274fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // free(p); 275fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // } 276fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // }; 277fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // int main() { 278fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // A *p = new A[100]; 279fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // delete[] p; 280fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // } 281fd708265e3b1dcfaae6a6832186aabb0de0c0aefJohn McCall // Whereas it prints "104" and "104" if you give A a destructor. 282e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall 283651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool requiresArrayCookie(const CXXDeleteExpr *expr, 284651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines QualType elementType) override; 285651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool requiresArrayCookie(const CXXNewExpr *expr) override; 286651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits getArrayCookieSizeImpl(QualType type) override; 287e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall llvm::Value *InitializeArrayCookie(CodeGenFunction &CGF, 288e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall llvm::Value *NewPtr, 289e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall llvm::Value *NumElements, 290e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall const CXXNewExpr *expr, 291651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines QualType ElementType) override; 292e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall llvm::Value *readArrayCookieImpl(CodeGenFunction &CGF, 293e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall llvm::Value *allocPtr, 294651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits cookieSize) override; 295a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 296ef8225444452a1486bd721f3285301fe84643b00Stephen Hines friend struct MSRTTIBuilder; 297ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 298ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool isImageRelative() const { 299ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return CGM.getTarget().getPointerWidth(/*AddressSpace=*/0) == 64; 300ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 301ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 302ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // 5 routines for constructing the llvm types for MS RTTI structs. 303ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::StructType *getTypeDescriptorType(StringRef TypeInfoString) { 304ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::SmallString<32> TDTypeName("rtti.TypeDescriptor"); 305ef8225444452a1486bd721f3285301fe84643b00Stephen Hines TDTypeName += llvm::utostr(TypeInfoString.size()); 306ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::StructType *&TypeDescriptorType = 307ef8225444452a1486bd721f3285301fe84643b00Stephen Hines TypeDescriptorTypeMap[TypeInfoString.size()]; 308ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (TypeDescriptorType) 309ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return TypeDescriptorType; 310ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Type *FieldTypes[] = { 311ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.Int8PtrPtrTy, 312ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.Int8PtrTy, 313ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ArrayType::get(CGM.Int8Ty, TypeInfoString.size() + 1)}; 314ef8225444452a1486bd721f3285301fe84643b00Stephen Hines TypeDescriptorType = 315ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::StructType::create(CGM.getLLVMContext(), FieldTypes, TDTypeName); 316ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return TypeDescriptorType; 317ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 318ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 319ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Type *getImageRelativeType(llvm::Type *PtrType) { 320ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!isImageRelative()) 321ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return PtrType; 322ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return CGM.IntTy; 323ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 324ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 325ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::StructType *getBaseClassDescriptorType() { 326ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (BaseClassDescriptorType) 327ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return BaseClassDescriptorType; 328ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Type *FieldTypes[] = { 329ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getImageRelativeType(CGM.Int8PtrTy), 330ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.IntTy, 331ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.IntTy, 332ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.IntTy, 333ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.IntTy, 334ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.IntTy, 335ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getImageRelativeType(getClassHierarchyDescriptorType()->getPointerTo()), 336ef8225444452a1486bd721f3285301fe84643b00Stephen Hines }; 337ef8225444452a1486bd721f3285301fe84643b00Stephen Hines BaseClassDescriptorType = llvm::StructType::create( 338ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.getLLVMContext(), FieldTypes, "rtti.BaseClassDescriptor"); 339ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return BaseClassDescriptorType; 340ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 341ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 342ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::StructType *getClassHierarchyDescriptorType() { 343ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (ClassHierarchyDescriptorType) 344ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return ClassHierarchyDescriptorType; 345ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Forward-declare RTTIClassHierarchyDescriptor to break a cycle. 346ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ClassHierarchyDescriptorType = llvm::StructType::create( 347ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.getLLVMContext(), "rtti.ClassHierarchyDescriptor"); 348ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Type *FieldTypes[] = { 349ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.IntTy, 350ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.IntTy, 351ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.IntTy, 352ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getImageRelativeType( 353ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getBaseClassDescriptorType()->getPointerTo()->getPointerTo()), 354ef8225444452a1486bd721f3285301fe84643b00Stephen Hines }; 355ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ClassHierarchyDescriptorType->setBody(FieldTypes); 356ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return ClassHierarchyDescriptorType; 357ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 358ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 359ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::StructType *getCompleteObjectLocatorType() { 360ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (CompleteObjectLocatorType) 361ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return CompleteObjectLocatorType; 362ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CompleteObjectLocatorType = llvm::StructType::create( 363ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.getLLVMContext(), "rtti.CompleteObjectLocator"); 364ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Type *FieldTypes[] = { 365ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.IntTy, 366ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.IntTy, 367ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.IntTy, 368ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getImageRelativeType(CGM.Int8PtrTy), 369ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getImageRelativeType(getClassHierarchyDescriptorType()->getPointerTo()), 370ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getImageRelativeType(CompleteObjectLocatorType), 371ef8225444452a1486bd721f3285301fe84643b00Stephen Hines }; 372ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ArrayRef<llvm::Type *> FieldTypesRef(FieldTypes); 373ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!isImageRelative()) 374ef8225444452a1486bd721f3285301fe84643b00Stephen Hines FieldTypesRef = FieldTypesRef.drop_back(); 375ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CompleteObjectLocatorType->setBody(FieldTypesRef); 376ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return CompleteObjectLocatorType; 377ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 378ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 379ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalVariable *getImageBase() { 380ef8225444452a1486bd721f3285301fe84643b00Stephen Hines StringRef Name = "__ImageBase"; 381ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (llvm::GlobalVariable *GV = CGM.getModule().getNamedGlobal(Name)) 382ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return GV; 383ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 384ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return new llvm::GlobalVariable(CGM.getModule(), CGM.Int8Ty, 385ef8225444452a1486bd721f3285301fe84643b00Stephen Hines /*isConstant=*/true, 386ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalValue::ExternalLinkage, 387ef8225444452a1486bd721f3285301fe84643b00Stephen Hines /*Initializer=*/nullptr, Name); 388ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 389ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 390ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *getImageRelativeConstant(llvm::Constant *PtrVal) { 391ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!isImageRelative()) 392ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return PtrVal; 393ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 394ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *ImageBaseAsInt = 395ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantExpr::getPtrToInt(getImageBase(), CGM.IntPtrTy); 396ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *PtrValAsInt = 397ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantExpr::getPtrToInt(PtrVal, CGM.IntPtrTy); 398ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *Diff = 399ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantExpr::getSub(PtrValAsInt, ImageBaseAsInt, 400ef8225444452a1486bd721f3285301fe84643b00Stephen Hines /*HasNUW=*/true, /*HasNSW=*/true); 401ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return llvm::ConstantExpr::getTrunc(Diff, CGM.IntTy); 402ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 403ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 404a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Klecknerprivate: 40511f22a35b7f08a8d017f6ab26e440edffc930f96Timur Iskhodzhanov MicrosoftMangleContext &getMangleContext() { 40611f22a35b7f08a8d017f6ab26e440edffc930f96Timur Iskhodzhanov return cast<MicrosoftMangleContext>(CodeGen::CGCXXABI::getMangleContext()); 40711f22a35b7f08a8d017f6ab26e440edffc930f96Timur Iskhodzhanov } 40811f22a35b7f08a8d017f6ab26e440edffc930f96Timur Iskhodzhanov 409a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Constant *getZeroInt() { 410a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return llvm::ConstantInt::get(CGM.IntTy, 0); 411a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner } 412a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 413a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Constant *getAllOnesInt() { 414a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return llvm::Constant::getAllOnesValue(CGM.IntTy); 415a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner } 416a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 417f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Constant *getConstantOrZeroInt(llvm::Constant *C) { 418f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return C ? C : getZeroInt(); 419f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner } 420f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 421f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Value *getValueOrZeroInt(llvm::Value *C) { 422f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return C ? C : getZeroInt(); 423f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner } 424f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 425651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits getVirtualFunctionPrologueThisAdjustment(GlobalDecl GD); 426651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 427a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner void 428a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner GetNullMemberPointerFields(const MemberPointerType *MPT, 429a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::SmallVectorImpl<llvm::Constant *> &fields); 430a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 431b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner /// \brief Shared code for virtual base adjustment. Returns the offset from 432b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner /// the vbptr to the virtual base. Optionally returns the address of the 433b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner /// vbptr itself. 434b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *GetVBaseOffsetFromVBPtr(CodeGenFunction &CGF, 435b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *Base, 436b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *VBPtrOffset, 437b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *VBTableOffset, 4386bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value **VBPtr = nullptr); 439b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner 440c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov llvm::Value *GetVBaseOffsetFromVBPtr(CodeGenFunction &CGF, 441c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov llvm::Value *Base, 442c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov int32_t VBPtrOffset, 443c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov int32_t VBTableOffset, 4446bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value **VBPtr = nullptr) { 445c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov llvm::Value *VBPOffset = llvm::ConstantInt::get(CGM.IntTy, VBPtrOffset), 446c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov *VBTOffset = llvm::ConstantInt::get(CGM.IntTy, VBTableOffset); 447c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov return GetVBaseOffsetFromVBPtr(CGF, Base, VBPOffset, VBTOffset, VBPtr); 448c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov } 449c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 450b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner /// \brief Performs a full virtual base adjustment. Used to dereference 451b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner /// pointers to members of virtual bases. 452651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *AdjustVirtualBase(CodeGenFunction &CGF, const Expr *E, 453651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD, llvm::Value *Base, 454a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *VirtualBaseAdjustmentOffset, 455a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *VBPtrOffset /* optional */); 456a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 45779e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner /// \brief Emits a full member pointer with the fields common to data and 45879e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner /// function member pointers. 45979e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner llvm::Constant *EmitFullMemberPointer(llvm::Constant *FirstField, 46079e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner bool IsMemberFunction, 461f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner const CXXRecordDecl *RD, 462f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner CharUnits NonVirtualBaseAdjustment); 463f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 464f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Constant *BuildMemberPointer(const CXXRecordDecl *RD, 465f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner const CXXMethodDecl *MD, 466f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner CharUnits NonVirtualBaseAdjustment); 467f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 468f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner bool MemberPointerConstantIsNull(const MemberPointerType *MPT, 469f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Constant *MP); 47079e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner 4719063302a82423cb83f002257a416741850739a70Reid Kleckner /// \brief - Initialize all vbptrs of 'this' with RD as the complete type. 4729063302a82423cb83f002257a416741850739a70Reid Kleckner void EmitVBPtrStores(CodeGenFunction &CGF, const CXXRecordDecl *RD); 4739063302a82423cb83f002257a416741850739a70Reid Kleckner 4749063302a82423cb83f002257a416741850739a70Reid Kleckner /// \brief Caching wrapper around VBTableBuilder::enumerateVBTables(). 475651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const VBTableGlobals &enumerateVBTables(const CXXRecordDecl *RD); 4769063302a82423cb83f002257a416741850739a70Reid Kleckner 47793b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg /// \brief Generate a thunk for calling a virtual member function MD. 478651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Function *EmitVirtualMemPtrThunk( 479651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXMethodDecl *MD, 480651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const MicrosoftVTableContext::MethodVFTableLocation &ML); 48193b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg 482a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Klecknerpublic: 483651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Type *ConvertMemberPointerType(const MemberPointerType *MPT) override; 484a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 485651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool isZeroInitializable(const MemberPointerType *MPT) override; 486a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 487651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Constant *EmitNullMemberPointer(const MemberPointerType *MPT) override; 488a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 489651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Constant *EmitMemberDataPointer(const MemberPointerType *MPT, 490651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits offset) override; 491651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Constant *EmitMemberPointer(const CXXMethodDecl *MD) override; 492651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Constant *EmitMemberPointer(const APValue &MP, QualType MPT) override; 493a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 494651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *EmitMemberPointerComparison(CodeGenFunction &CGF, 495651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *L, 496651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *R, 497651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const MemberPointerType *MPT, 498651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool Inequality) override; 4993d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner 500651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *EmitMemberPointerIsNotNull(CodeGenFunction &CGF, 501651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *MemPtr, 502651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const MemberPointerType *MPT) override; 503a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 504651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value * 505651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines EmitMemberDataPointerAddress(CodeGenFunction &CGF, const Expr *E, 506651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *Base, llvm::Value *MemPtr, 507651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const MemberPointerType *MPT) override; 508a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 509651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *EmitMemberPointerConversion(CodeGenFunction &CGF, 510651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CastExpr *E, 511651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *Src) override; 512f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 513651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Constant *EmitMemberPointerConversion(const CastExpr *E, 514651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Constant *Src) override; 515f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 516651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value * 517651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines EmitLoadOfMemberFunctionPointer(CodeGenFunction &CGF, const Expr *E, 518651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *&This, llvm::Value *MemPtr, 519651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const MemberPointerType *MPT) override; 520a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 5219063302a82423cb83f002257a416741850739a70Reid Klecknerprivate: 522a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov typedef std::pair<const CXXRecordDecl *, CharUnits> VFTableIdTy; 523ef8225444452a1486bd721f3285301fe84643b00Stephen Hines typedef llvm::DenseMap<VFTableIdTy, llvm::GlobalVariable *> VTablesMapTy; 524ef8225444452a1486bd721f3285301fe84643b00Stephen Hines typedef llvm::DenseMap<VFTableIdTy, llvm::GlobalValue *> VFTablesMapTy; 525a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov /// \brief All the vftables that have been referenced. 526a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov VFTablesMapTy VFTablesMap; 527ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VTablesMapTy VTablesMap; 528a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 529a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov /// \brief This set holds the record decls we've deferred vtable emission for. 530a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov llvm::SmallPtrSet<const CXXRecordDecl *, 4> DeferredVFTables; 531a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 532a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 533a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov /// \brief All the vbtables which have been referenced. 534651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::DenseMap<const CXXRecordDecl *, VBTableGlobals> VBTablesMap; 535942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner 536942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner /// Info on the global variable used to guard initialization of static locals. 537942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner /// The BitIndex field is only used for externally invisible declarations. 538942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner struct GuardInfo { 5396bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines GuardInfo() : Guard(nullptr), BitIndex(0) {} 540942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner llvm::GlobalVariable *Guard; 541942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner unsigned BitIndex; 542942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner }; 543942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner 544942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner /// Map from DeclContext to the current guard variable. We assume that the 545942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner /// AST is visited in source code order. 546942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner llvm::DenseMap<const DeclContext *, GuardInfo> GuardVariableMap; 547ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 548ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::DenseMap<size_t, llvm::StructType *> TypeDescriptorTypeMap; 549ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::StructType *BaseClassDescriptorType; 550ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::StructType *ClassHierarchyDescriptorType; 551ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::StructType *CompleteObjectLocatorType; 552c3926645d70842eae22641df1bf69da457a0ff11Charles Davis}; 553c3926645d70842eae22641df1bf69da457a0ff11Charles Davis 554c3926645d70842eae22641df1bf69da457a0ff11Charles Davis} 555c3926645d70842eae22641df1bf69da457a0ff11Charles Davis 5566bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen HinesCGCXXABI::RecordArgABI 5576bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen HinesMicrosoftCXXABI::getRecordArgABI(const CXXRecordDecl *RD) const { 5586bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines switch (CGM.getTarget().getTriple().getArch()) { 5596bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines default: 5606bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // FIXME: Implement for other architectures. 5616bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return RAA_Default; 5626bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 5636bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines case llvm::Triple::x86: 5646bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // All record arguments are passed in memory on x86. Decide whether to 5656bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // construct the object directly in argument memory, or to construct the 5666bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // argument elsewhere and copy the bytes during the call. 5676bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 5686bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // If C++ prohibits us from making a copy, construct the arguments directly 5696bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // into argument memory. 5706bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (!canCopyArgument(RD)) 5716bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return RAA_DirectInMemory; 5726bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 5736bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // Otherwise, construct the argument into a temporary and copy the bytes 5746bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // into the outgoing argument memory. 5756bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return RAA_Default; 5766bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 5776bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines case llvm::Triple::x86_64: 5786bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // Win64 passes objects with non-trivial copy ctors indirectly. 5796bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (RD->hasNonTrivialCopyConstructor()) 5806bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return RAA_Indirect; 5816bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 5826bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // Win64 passes objects larger than 8 bytes indirectly. 5836bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (getContext().getTypeSize(RD->getTypeForDecl()) > 64) 5846bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return RAA_Indirect; 5856bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 5866bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // We have a trivial copy constructor or no copy constructors, but we have 5876bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // to make sure it isn't deleted. 5886bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines bool CopyDeleted = false; 5896bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines for (const CXXConstructorDecl *CD : RD->ctors()) { 5906bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (CD->isCopyConstructor()) { 5916bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines assert(CD->isTrivial()); 5926bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // We had at least one undeleted trivial copy ctor. Return directly. 5936bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (!CD->isDeleted()) 5946bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return RAA_Default; 5956bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CopyDeleted = true; 5966bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines } 5976bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines } 5986bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 5996bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // The trivial copy constructor was deleted. Return indirectly. 6006bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (CopyDeleted) 6016bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return RAA_Indirect; 6026bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 6036bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // There were no copy ctors. Return in RAX. 6046bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return RAA_Default; 6056bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines } 6066bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 6076bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm_unreachable("invalid enum"); 6086bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines} 6096bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 610ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCallllvm::Value *MicrosoftCXXABI::adjustToCompleteObject(CodeGenFunction &CGF, 611ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall llvm::Value *ptr, 612ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall QualType type) { 613ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall // FIXME: implement 614ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall return ptr; 615ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall} 616ecd03b447bb0e2ed1954c77441d49a4a17ca8138John McCall 617ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// \brief Gets the offset to the virtual base that contains the vfptr for 618ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// MS-ABI polymorphic types. 619ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesstatic llvm::Value *getPolymorphicOffset(CodeGenFunction &CGF, 620ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const CXXRecordDecl *RD, 621ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *Value) { 622ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const ASTContext &Context = RD->getASTContext(); 623ef8225444452a1486bd721f3285301fe84643b00Stephen Hines for (const CXXBaseSpecifier &Base : RD->vbases()) 624ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (Context.getASTRecordLayout(Base.getType()->getAsCXXRecordDecl()) 625ef8225444452a1486bd721f3285301fe84643b00Stephen Hines .hasExtendableVFPtr()) 626ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return CGF.CGM.getCXXABI().GetVirtualBaseClassOffset( 627ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGF, Value, RD, Base.getType()->getAsCXXRecordDecl()); 628ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm_unreachable("One of our vbases should be polymorphic."); 629ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 630ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 631ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesstatic std::pair<llvm::Value *, llvm::Value *> 632ef8225444452a1486bd721f3285301fe84643b00Stephen HinesperformBaseAdjustment(CodeGenFunction &CGF, llvm::Value *Value, 633ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType SrcRecordTy) { 634ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Value = CGF.Builder.CreateBitCast(Value, CGF.Int8PtrTy); 635ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const CXXRecordDecl *SrcDecl = SrcRecordTy->getAsCXXRecordDecl(); 636ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 637ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (CGF.getContext().getASTRecordLayout(SrcDecl).hasExtendableVFPtr()) 638ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return std::make_pair(Value, llvm::ConstantInt::get(CGF.Int32Ty, 0)); 639ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 640ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Perform a base adjustment. 641ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *Offset = getPolymorphicOffset(CGF, SrcDecl, Value); 642ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Value = CGF.Builder.CreateInBoundsGEP(Value, Offset); 643ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Offset = CGF.Builder.CreateTrunc(Offset, CGF.Int32Ty); 644ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return std::make_pair(Value, Offset); 645ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 646ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 647ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesbool MicrosoftCXXABI::shouldTypeidBeNullChecked(bool IsDeref, 648ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType SrcRecordTy) { 649ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const CXXRecordDecl *SrcDecl = SrcRecordTy->getAsCXXRecordDecl(); 650ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return IsDeref && 651ef8225444452a1486bd721f3285301fe84643b00Stephen Hines !CGM.getContext().getASTRecordLayout(SrcDecl).hasExtendableVFPtr(); 652ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 653ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 654ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesstatic llvm::CallSite emitRTtypeidCall(CodeGenFunction &CGF, 655ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *Argument) { 656ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Type *ArgTypes[] = {CGF.Int8PtrTy}; 657ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::FunctionType *FTy = 658ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::FunctionType::get(CGF.Int8PtrTy, ArgTypes, false); 659ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *Args[] = {Argument}; 660ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *Fn = CGF.CGM.CreateRuntimeFunction(FTy, "__RTtypeid"); 661ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return CGF.EmitRuntimeCallOrInvoke(Fn, Args); 662ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 663ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 664ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesvoid MicrosoftCXXABI::EmitBadTypeidCall(CodeGenFunction &CGF) { 665ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::CallSite Call = 666ef8225444452a1486bd721f3285301fe84643b00Stephen Hines emitRTtypeidCall(CGF, llvm::Constant::getNullValue(CGM.VoidPtrTy)); 667ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Call.setDoesNotReturn(); 668ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGF.Builder.CreateUnreachable(); 669ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 670ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 671ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesllvm::Value *MicrosoftCXXABI::EmitTypeid(CodeGenFunction &CGF, 672ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType SrcRecordTy, 673ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *ThisPtr, 674ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Type *StdTypeInfoPtrTy) { 675ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *Offset; 676ef8225444452a1486bd721f3285301fe84643b00Stephen Hines std::tie(ThisPtr, Offset) = performBaseAdjustment(CGF, ThisPtr, SrcRecordTy); 677ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return CGF.Builder.CreateBitCast( 678ef8225444452a1486bd721f3285301fe84643b00Stephen Hines emitRTtypeidCall(CGF, ThisPtr).getInstruction(), StdTypeInfoPtrTy); 679ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 680ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 681ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesbool MicrosoftCXXABI::shouldDynamicCastCallBeNullChecked(bool SrcIsPtr, 682ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType SrcRecordTy) { 683ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const CXXRecordDecl *SrcDecl = SrcRecordTy->getAsCXXRecordDecl(); 684ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return SrcIsPtr && 685ef8225444452a1486bd721f3285301fe84643b00Stephen Hines !CGM.getContext().getASTRecordLayout(SrcDecl).hasExtendableVFPtr(); 686ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 687ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 688ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesllvm::Value *MicrosoftCXXABI::EmitDynamicCastCall( 689ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CodeGenFunction &CGF, llvm::Value *Value, QualType SrcRecordTy, 690ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType DestTy, QualType DestRecordTy, llvm::BasicBlock *CastEnd) { 691ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Type *DestLTy = CGF.ConvertType(DestTy); 692ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 693ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *SrcRTTI = 694ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGF.CGM.GetAddrOfRTTIDescriptor(SrcRecordTy.getUnqualifiedType()); 695ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *DestRTTI = 696ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGF.CGM.GetAddrOfRTTIDescriptor(DestRecordTy.getUnqualifiedType()); 697ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 698ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *Offset; 699ef8225444452a1486bd721f3285301fe84643b00Stephen Hines std::tie(Value, Offset) = performBaseAdjustment(CGF, Value, SrcRecordTy); 700ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 701ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // PVOID __RTDynamicCast( 702ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // PVOID inptr, 703ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // LONG VfDelta, 704ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // PVOID SrcType, 705ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // PVOID TargetType, 706ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // BOOL isReference) 707ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Type *ArgTypes[] = {CGF.Int8PtrTy, CGF.Int32Ty, CGF.Int8PtrTy, 708ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGF.Int8PtrTy, CGF.Int32Ty}; 709ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *Function = CGF.CGM.CreateRuntimeFunction( 710ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::FunctionType::get(CGF.Int8PtrTy, ArgTypes, false), 711ef8225444452a1486bd721f3285301fe84643b00Stephen Hines "__RTDynamicCast"); 712ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *Args[] = { 713ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Value, Offset, SrcRTTI, DestRTTI, 714ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGF.Int32Ty, DestTy->isReferenceType())}; 715ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Value = CGF.EmitRuntimeCallOrInvoke(Function, Args).getInstruction(); 716ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return CGF.Builder.CreateBitCast(Value, DestLTy); 717ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 718ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 719ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesllvm::Value * 720ef8225444452a1486bd721f3285301fe84643b00Stephen HinesMicrosoftCXXABI::EmitDynamicCastToVoid(CodeGenFunction &CGF, llvm::Value *Value, 721ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType SrcRecordTy, 722ef8225444452a1486bd721f3285301fe84643b00Stephen Hines QualType DestTy) { 723ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *Offset; 724ef8225444452a1486bd721f3285301fe84643b00Stephen Hines std::tie(Value, Offset) = performBaseAdjustment(CGF, Value, SrcRecordTy); 725ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 726ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // PVOID __RTCastToVoid( 727ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // PVOID inptr) 728ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Type *ArgTypes[] = {CGF.Int8PtrTy}; 729ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *Function = CGF.CGM.CreateRuntimeFunction( 730ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::FunctionType::get(CGF.Int8PtrTy, ArgTypes, false), 731ef8225444452a1486bd721f3285301fe84643b00Stephen Hines "__RTCastToVoid"); 732ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *Args[] = {Value}; 733ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return CGF.EmitRuntimeCall(Function, Args); 734ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 735ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 736ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesbool MicrosoftCXXABI::EmitBadCastCall(CodeGenFunction &CGF) { 737ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return false; 738ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 739ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 740b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Klecknerllvm::Value * 741b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid KlecknerMicrosoftCXXABI::GetVirtualBaseClassOffset(CodeGenFunction &CGF, 742b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *This, 743b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner const CXXRecordDecl *ClassDecl, 744b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner const CXXRecordDecl *BaseClassDecl) { 745651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines int64_t VBPtrChars = 746651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines getContext().getASTRecordLayout(ClassDecl).getVBPtrOffset().getQuantity(); 747b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *VBPtrOffset = llvm::ConstantInt::get(CGM.PtrDiffTy, VBPtrChars); 748b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner CharUnits IntSize = getContext().getTypeSizeInChars(getContext().IntTy); 7495f0db587078b5af32fc9ac41fe4276b80918fd8dTimur Iskhodzhanov CharUnits VBTableChars = 7505f0db587078b5af32fc9ac41fe4276b80918fd8dTimur Iskhodzhanov IntSize * 7515f0db587078b5af32fc9ac41fe4276b80918fd8dTimur Iskhodzhanov CGM.getMicrosoftVTableContext().getVBTableIndex(ClassDecl, BaseClassDecl); 752b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *VBTableOffset = 753b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::ConstantInt::get(CGM.IntTy, VBTableChars.getQuantity()); 754b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner 755b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *VBPtrToNewBase = 7560e4f5598fedc333a05c0611fe3ad46266f5e1b5fTimur Iskhodzhanov GetVBaseOffsetFromVBPtr(CGF, This, VBPtrOffset, VBTableOffset); 757b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner VBPtrToNewBase = 758b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner CGF.Builder.CreateSExtOrBitCast(VBPtrToNewBase, CGM.PtrDiffTy); 759b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner return CGF.Builder.CreateNSWAdd(VBPtrOffset, VBPtrToNewBase); 760b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner} 761b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner 7623b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Linbool MicrosoftCXXABI::HasThisReturn(GlobalDecl GD) const { 7633b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin return isa<CXXConstructorDecl>(GD.getDecl()); 764bd31574a0f01da2cb2abde004b36772eb8a048dcJohn McCall} 765bd31574a0f01da2cb2abde004b36772eb8a048dcJohn McCall 7666bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hinesbool MicrosoftCXXABI::classifyReturnType(CGFunctionInfo &FI) const { 7676bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines const CXXRecordDecl *RD = FI.getReturnType()->getAsCXXRecordDecl(); 7686bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (!RD) 7696bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return false; 7706bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 7716bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (FI.isInstanceMethod()) { 7726bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // If it's an instance method, aggregates are always returned indirectly via 7736bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // the second parameter. 7746bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines FI.getReturnInfo() = ABIArgInfo::getIndirect(0, /*ByVal=*/false); 7756bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines FI.getReturnInfo().setSRetAfterThis(FI.isInstanceMethod()); 7766bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return true; 7776bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines } else if (!RD->isPOD()) { 7786bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // If it's a free function, non-POD types are returned indirectly. 7796bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines FI.getReturnInfo() = ABIArgInfo::getIndirect(0, /*ByVal=*/false); 7806bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return true; 7816bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines } 7826bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 7836bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // Otherwise, use the C ABI rules. 7846bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return false; 7856bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines} 7866bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 787651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesvoid MicrosoftCXXABI::BuildConstructorSignature( 788651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXConstructorDecl *Ctor, CXXCtorType Type, CanQualType &ResTy, 789651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines SmallVectorImpl<CanQualType> &ArgTys) { 790651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 791651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // All parameters are already in place except is_most_derived, which goes 792651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // after 'this' if it's variadic and last if it's not. 7931d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov 7941d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov const CXXRecordDecl *Class = Ctor->getParent(); 795651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const FunctionProtoType *FPT = Ctor->getType()->castAs<FunctionProtoType>(); 7961d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov if (Class->getNumVBases()) { 797651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (FPT->isVariadic()) 798651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines ArgTys.insert(ArgTys.begin() + 1, CGM.getContext().IntTy); 799651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines else 800651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines ArgTys.push_back(CGM.getContext().IntTy); 8011d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov } 8021d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov} 8031d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov 8049063302a82423cb83f002257a416741850739a70Reid Klecknerllvm::BasicBlock * 8059063302a82423cb83f002257a416741850739a70Reid KlecknerMicrosoftCXXABI::EmitCtorCompleteObjectHandler(CodeGenFunction &CGF, 8069063302a82423cb83f002257a416741850739a70Reid Kleckner const CXXRecordDecl *RD) { 8071d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov llvm::Value *IsMostDerivedClass = getStructorImplicitParamValue(CGF); 8081d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov assert(IsMostDerivedClass && 8091d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov "ctor for a class with virtual bases must have an implicit parameter"); 8109063302a82423cb83f002257a416741850739a70Reid Kleckner llvm::Value *IsCompleteObject = 8119063302a82423cb83f002257a416741850739a70Reid Kleckner CGF.Builder.CreateIsNotNull(IsMostDerivedClass, "is_complete_object"); 8121d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov 8131d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov llvm::BasicBlock *CallVbaseCtorsBB = CGF.createBasicBlock("ctor.init_vbases"); 8141d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov llvm::BasicBlock *SkipVbaseCtorsBB = CGF.createBasicBlock("ctor.skip_vbases"); 8151d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov CGF.Builder.CreateCondBr(IsCompleteObject, 8161d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov CallVbaseCtorsBB, SkipVbaseCtorsBB); 8171d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov 8181d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov CGF.EmitBlock(CallVbaseCtorsBB); 8199063302a82423cb83f002257a416741850739a70Reid Kleckner 8209063302a82423cb83f002257a416741850739a70Reid Kleckner // Fill in the vbtable pointers here. 8219063302a82423cb83f002257a416741850739a70Reid Kleckner EmitVBPtrStores(CGF, RD); 8221d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov 8231d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov // CGF will put the base ctor calls in this basic block for us later. 8241d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov 8251d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov return SkipVbaseCtorsBB; 826bd31574a0f01da2cb2abde004b36772eb8a048dcJohn McCall} 827bd31574a0f01da2cb2abde004b36772eb8a048dcJohn McCall 8285bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanovvoid MicrosoftCXXABI::initializeHiddenVirtualInheritanceMembers( 8295bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov CodeGenFunction &CGF, const CXXRecordDecl *RD) { 8305bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // In most cases, an override for a vbase virtual method can adjust 8315bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // the "this" parameter by applying a constant offset. 8325bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // However, this is not enough while a constructor or a destructor of some 8335bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // class X is being executed if all the following conditions are met: 8345bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // - X has virtual bases, (1) 8355bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // - X overrides a virtual method M of a vbase Y, (2) 8365bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // - X itself is a vbase of the most derived class. 8375bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // 8385bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // If (1) and (2) are true, the vtorDisp for vbase Y is a hidden member of X 8395bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // which holds the extra amount of "this" adjustment we must do when we use 8405bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // the X vftables (i.e. during X ctor or dtor). 8415bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // Outside the ctors and dtors, the values of vtorDisps are zero. 8425bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov 8435bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov const ASTRecordLayout &Layout = getContext().getASTRecordLayout(RD); 8445bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov typedef ASTRecordLayout::VBaseOffsetsMapTy VBOffsets; 8455bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov const VBOffsets &VBaseMap = Layout.getVBaseOffsetsMap(); 8465bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov CGBuilderTy &Builder = CGF.Builder; 8475bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov 8485bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov unsigned AS = 8495bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov cast<llvm::PointerType>(getThisValue(CGF)->getType())->getAddressSpace(); 8506bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *Int8This = nullptr; // Initialize lazily. 8515bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov 8525bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov for (VBOffsets::const_iterator I = VBaseMap.begin(), E = VBaseMap.end(); 8535bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov I != E; ++I) { 8545bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov if (!I->second.hasVtorDisp()) 8555bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov continue; 8565bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov 85742e68d5b2355d4d4de19ea70e6dc57dfea4da247Timur Iskhodzhanov llvm::Value *VBaseOffset = 85842e68d5b2355d4d4de19ea70e6dc57dfea4da247Timur Iskhodzhanov GetVirtualBaseClassOffset(CGF, getThisValue(CGF), RD, I->first); 8595bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // FIXME: it doesn't look right that we SExt in GetVirtualBaseClassOffset() 8605bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // just to Trunc back immediately. 8615bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov VBaseOffset = Builder.CreateTruncOrBitCast(VBaseOffset, CGF.Int32Ty); 8625bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov uint64_t ConstantVBaseOffset = 8635bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov Layout.getVBaseClassOffset(I->first).getQuantity(); 8645bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov 8655bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // vtorDisp_for_vbase = vbptr[vbase_idx] - offsetof(RD, vbase). 8665bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov llvm::Value *VtorDispValue = Builder.CreateSub( 8675bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov VBaseOffset, llvm::ConstantInt::get(CGM.Int32Ty, ConstantVBaseOffset), 8685bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov "vtordisp.value"); 8695bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov 8705bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov if (!Int8This) 8715bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov Int8This = Builder.CreateBitCast(getThisValue(CGF), 8725bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov CGF.Int8Ty->getPointerTo(AS)); 8735bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov llvm::Value *VtorDispPtr = Builder.CreateInBoundsGEP(Int8This, VBaseOffset); 8745bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov // vtorDisp is always the 32-bits before the vbase in the class layout. 8755bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov VtorDispPtr = Builder.CreateConstGEP1_32(VtorDispPtr, -4); 8765bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov VtorDispPtr = Builder.CreateBitCast( 8775bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov VtorDispPtr, CGF.Int32Ty->getPointerTo(AS), "vtordisp.ptr"); 8785bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov 8795bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov Builder.CreateStore(VtorDispValue, VtorDispPtr); 8805bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov } 8815bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov} 8825bd0d44c8da50f3a629c90fee92ce5cf1e31c9ffTimur Iskhodzhanov 883bb1b797d2e432293563747bd9704b22cf0787061Timur Iskhodzhanovvoid MicrosoftCXXABI::EmitCXXConstructors(const CXXConstructorDecl *D) { 884bb1b797d2e432293563747bd9704b22cf0787061Timur Iskhodzhanov // There's only one constructor type in this ABI. 885bb1b797d2e432293563747bd9704b22cf0787061Timur Iskhodzhanov CGM.EmitGlobal(GlobalDecl(D, Ctor_Complete)); 886bb1b797d2e432293563747bd9704b22cf0787061Timur Iskhodzhanov} 887bb1b797d2e432293563747bd9704b22cf0787061Timur Iskhodzhanov 8889063302a82423cb83f002257a416741850739a70Reid Klecknervoid MicrosoftCXXABI::EmitVBPtrStores(CodeGenFunction &CGF, 8899063302a82423cb83f002257a416741850739a70Reid Kleckner const CXXRecordDecl *RD) { 8909063302a82423cb83f002257a416741850739a70Reid Kleckner llvm::Value *ThisInt8Ptr = 8919063302a82423cb83f002257a416741850739a70Reid Kleckner CGF.Builder.CreateBitCast(getThisValue(CGF), CGM.Int8PtrTy, "this.int8"); 892651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); 8939063302a82423cb83f002257a416741850739a70Reid Kleckner 894651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const VBTableGlobals &VBGlobals = enumerateVBTables(RD); 895651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines for (unsigned I = 0, E = VBGlobals.VBTables->size(); I != E; ++I) { 896651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const VPtrInfo *VBT = (*VBGlobals.VBTables)[I]; 897651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::GlobalVariable *GV = VBGlobals.Globals[I]; 8989063302a82423cb83f002257a416741850739a70Reid Kleckner const ASTRecordLayout &SubobjectLayout = 899651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGM.getContext().getASTRecordLayout(VBT->BaseWithVPtr); 900651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits Offs = VBT->NonVirtualOffset; 901651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Offs += SubobjectLayout.getVBPtrOffset(); 902651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (VBT->getVBaseWithVPtr()) 903651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Offs += Layout.getVBaseClassOffset(VBT->getVBaseWithVPtr()); 9049063302a82423cb83f002257a416741850739a70Reid Kleckner llvm::Value *VBPtr = 905651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGF.Builder.CreateConstInBoundsGEP1_64(ThisInt8Ptr, Offs.getQuantity()); 906651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines VBPtr = CGF.Builder.CreateBitCast(VBPtr, GV->getType()->getPointerTo(0), 907651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines "vbptr." + VBT->ReusingBase->getName()); 908651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGF.Builder.CreateStore(GV, VBPtr); 9099063302a82423cb83f002257a416741850739a70Reid Kleckner } 9109063302a82423cb83f002257a416741850739a70Reid Kleckner} 9119063302a82423cb83f002257a416741850739a70Reid Kleckner 91259660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanovvoid MicrosoftCXXABI::BuildDestructorSignature(const CXXDestructorDecl *Dtor, 91359660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov CXXDtorType Type, 91459660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov CanQualType &ResTy, 91559660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov SmallVectorImpl<CanQualType> &ArgTys) { 91659660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov // 'this' is already in place 9173b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin 91859660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov // TODO: 'for base' flag 91959660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov 92059660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov if (Type == Dtor_Deleting) { 9211f71f393e2d01f73d237e04677a82d4e0e6139efTimur Iskhodzhanov // The scalar deleting destructor takes an implicit int parameter. 9221f71f393e2d01f73d237e04677a82d4e0e6139efTimur Iskhodzhanov ArgTys.push_back(CGM.getContext().IntTy); 92359660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov } 92459660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov} 92559660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov 926a4130baad9d10b7feabb7e003da53424e986d269Reid Klecknervoid MicrosoftCXXABI::EmitCXXDestructors(const CXXDestructorDecl *D) { 927a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // The TU defining a dtor is only guaranteed to emit a base destructor. All 928a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner // other destructor variants are delegating thunks. 929a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner CGM.EmitGlobal(GlobalDecl(D, Dtor_Base)); 930a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner} 931a4130baad9d10b7feabb7e003da53424e986d269Reid Kleckner 932651f13cea278ec967336033dd032faef0e9fc2ecStephen HinesCharUnits 933651f13cea278ec967336033dd032faef0e9fc2ecStephen HinesMicrosoftCXXABI::getVirtualFunctionPrologueThisAdjustment(GlobalDecl GD) { 934651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines GD = GD.getCanonicalDecl(); 935651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); 936651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 937651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines GlobalDecl LookupGD = GD; 938651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(MD)) { 939651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Complete destructors take a pointer to the complete object as a 940651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // parameter, thus don't need this adjustment. 941651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (GD.getDtorType() == Dtor_Complete) 942651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return CharUnits(); 943651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 944651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // There's no Dtor_Base in vftable but it shares the this adjustment with 945651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // the deleting one, so look it up instead. 946651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines LookupGD = GlobalDecl(DD, Dtor_Deleting); 947651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } 948651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 949651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MicrosoftVTableContext::MethodVFTableLocation ML = 950651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGM.getMicrosoftVTableContext().getMethodVFTableLocation(LookupGD); 951651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits Adjustment = ML.VFPtrOffset; 952651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 953651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Normal virtual instance methods need to adjust from the vfptr that first 954651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // defined the virtual method to the virtual base subobject, but destructors 955651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // do not. The vector deleting destructor thunk applies this adjustment for 956651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // us if necessary. 957651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (isa<CXXDestructorDecl>(MD)) 958651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Adjustment = CharUnits::Zero(); 959651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 960651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (ML.VBase) { 961651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const ASTRecordLayout &DerivedLayout = 962651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGM.getContext().getASTRecordLayout(MD->getParent()); 963651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Adjustment += DerivedLayout.getVBaseClassOffset(ML.VBase); 964651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } 965651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 966651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return Adjustment; 967651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines} 968651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 969651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesllvm::Value *MicrosoftCXXABI::adjustThisArgumentForVirtualFunctionCall( 970651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CodeGenFunction &CGF, GlobalDecl GD, llvm::Value *This, bool VirtualCall) { 971651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (!VirtualCall) { 972651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // If the call of a virtual function is not virtual, we just have to 973651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // compensate for the adjustment the virtual function does in its prologue. 974651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits Adjustment = getVirtualFunctionPrologueThisAdjustment(GD); 975651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (Adjustment.isZero()) 976651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return This; 977651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 978651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines unsigned AS = cast<llvm::PointerType>(This->getType())->getAddressSpace(); 979651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Type *charPtrTy = CGF.Int8Ty->getPointerTo(AS); 980651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines This = CGF.Builder.CreateBitCast(This, charPtrTy); 981651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines assert(Adjustment.isPositive()); 982651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return CGF.Builder.CreateConstGEP1_32(This, Adjustment.getQuantity()); 983651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } 984651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 9858f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov GD = GD.getCanonicalDecl(); 9868f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); 98782552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov 98882552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov GlobalDecl LookupGD = GD; 98982552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(MD)) { 99082552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov // Complete dtors take a pointer to the complete object, 99182552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov // thus don't need adjustment. 99282552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov if (GD.getDtorType() == Dtor_Complete) 99382552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov return This; 99482552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov 99582552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov // There's only Dtor_Deleting in vftable but it shares the this adjustment 99682552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov // with the base one, so look up the deleting one instead. 99782552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov LookupGD = GlobalDecl(DD, Dtor_Deleting); 99882552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov } 9995f0db587078b5af32fc9ac41fe4276b80918fd8dTimur Iskhodzhanov MicrosoftVTableContext::MethodVFTableLocation ML = 10005f0db587078b5af32fc9ac41fe4276b80918fd8dTimur Iskhodzhanov CGM.getMicrosoftVTableContext().getMethodVFTableLocation(LookupGD); 10018f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 10028f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov unsigned AS = cast<llvm::PointerType>(This->getType())->getAddressSpace(); 10038f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov llvm::Type *charPtrTy = CGF.Int8Ty->getPointerTo(AS); 100440aa366f994f7b2c103e94f903a34226b4b8f06bTimur Iskhodzhanov CharUnits StaticOffset = ML.VFPtrOffset; 100582552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov 1006651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Base destructors expect 'this' to point to the beginning of the base 1007651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // subobject, not the first vfptr that happens to contain the virtual dtor. 1008651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // However, we still need to apply the virtual base adjustment. 1009651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (isa<CXXDestructorDecl>(MD) && GD.getDtorType() == Dtor_Base) 1010651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines StaticOffset = CharUnits::Zero(); 1011651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1012651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (ML.VBase) { 1013651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines This = CGF.Builder.CreateBitCast(This, charPtrTy); 1014651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *VBaseOffset = 1015651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines GetVirtualBaseClassOffset(CGF, This, MD->getParent(), ML.VBase); 1016651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines This = CGF.Builder.CreateInBoundsGEP(This, VBaseOffset); 10178f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov } 10188f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov if (!StaticOffset.isZero()) { 10198f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov assert(StaticOffset.isPositive()); 10208f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov This = CGF.Builder.CreateBitCast(This, charPtrTy); 10216d87e65b8fd01b36c7d3dd121462cb95f94404d6Timur Iskhodzhanov if (ML.VBase) { 10226d87e65b8fd01b36c7d3dd121462cb95f94404d6Timur Iskhodzhanov // Non-virtual adjustment might result in a pointer outside the allocated 10236d87e65b8fd01b36c7d3dd121462cb95f94404d6Timur Iskhodzhanov // object, e.g. if the final overrider class is laid out after the virtual 10246d87e65b8fd01b36c7d3dd121462cb95f94404d6Timur Iskhodzhanov // base that declares a method in the most derived class. 10256d87e65b8fd01b36c7d3dd121462cb95f94404d6Timur Iskhodzhanov // FIXME: Update the code that emits this adjustment in thunks prologues. 10266d87e65b8fd01b36c7d3dd121462cb95f94404d6Timur Iskhodzhanov This = CGF.Builder.CreateConstGEP1_32(This, StaticOffset.getQuantity()); 10276d87e65b8fd01b36c7d3dd121462cb95f94404d6Timur Iskhodzhanov } else { 10286d87e65b8fd01b36c7d3dd121462cb95f94404d6Timur Iskhodzhanov This = CGF.Builder.CreateConstInBoundsGEP1_32(This, 10296d87e65b8fd01b36c7d3dd121462cb95f94404d6Timur Iskhodzhanov StaticOffset.getQuantity()); 10306d87e65b8fd01b36c7d3dd121462cb95f94404d6Timur Iskhodzhanov } 10318f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov } 10328f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov return This; 10338f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov} 10348f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 103559660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanovstatic bool IsDeletingDtor(GlobalDecl GD) { 103659660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov const CXXMethodDecl* MD = cast<CXXMethodDecl>(GD.getDecl()); 103759660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov if (isa<CXXDestructorDecl>(MD)) { 103859660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov return GD.getDtorType() == Dtor_Deleting; 103959660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov } 104059660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov return false; 104159660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov} 104259660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov 1043651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesvoid MicrosoftCXXABI::addImplicitStructorParams(CodeGenFunction &CGF, 1044651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines QualType &ResTy, 1045651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines FunctionArgList &Params) { 10461d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov ASTContext &Context = getContext(); 10471d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov const CXXMethodDecl *MD = cast<CXXMethodDecl>(CGF.CurGD.getDecl()); 1048651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines assert(isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD)); 10491d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov if (isa<CXXConstructorDecl>(MD) && MD->getParent()->getNumVBases()) { 10501d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov ImplicitParamDecl *IsMostDerived 10516bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines = ImplicitParamDecl::Create(Context, nullptr, 10521d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov CGF.CurGD.getDecl()->getLocation(), 10531d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov &Context.Idents.get("is_most_derived"), 10541d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov Context.IntTy); 1055651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // The 'most_derived' parameter goes second if the ctor is variadic and last 1056651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // if it's not. Dtors can't be variadic. 1057651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const FunctionProtoType *FPT = MD->getType()->castAs<FunctionProtoType>(); 1058651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (FPT->isVariadic()) 1059651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Params.insert(Params.begin() + 1, IsMostDerived); 1060651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines else 1061651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Params.push_back(IsMostDerived); 10621d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov getStructorImplicitParamDecl(CGF) = IsMostDerived; 10631d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov } else if (IsDeletingDtor(CGF.CurGD)) { 106459660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov ImplicitParamDecl *ShouldDelete 10656bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines = ImplicitParamDecl::Create(Context, nullptr, 106659660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov CGF.CurGD.getDecl()->getLocation(), 106759660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov &Context.Idents.get("should_call_delete"), 10681f71f393e2d01f73d237e04677a82d4e0e6139efTimur Iskhodzhanov Context.IntTy); 106959660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov Params.push_back(ShouldDelete); 107059660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov getStructorImplicitParamDecl(CGF) = ShouldDelete; 107159660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov } 1072bd31574a0f01da2cb2abde004b36772eb8a048dcJohn McCall} 1073bd31574a0f01da2cb2abde004b36772eb8a048dcJohn McCall 10748f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanovllvm::Value *MicrosoftCXXABI::adjustThisParameterInVirtualFunctionPrologue( 10758f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov CodeGenFunction &CGF, GlobalDecl GD, llvm::Value *This) { 10768f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov // In this ABI, every virtual function takes a pointer to one of the 10778f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov // subobjects that first defines it as the 'this' parameter, rather than a 1078651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // pointer to the final overrider subobject. Thus, we need to adjust it back 10798f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov // to the final overrider subobject before use. 10808f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov // See comments in the MicrosoftVFTableContext implementation for the details. 1081651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits Adjustment = getVirtualFunctionPrologueThisAdjustment(GD); 10828f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov if (Adjustment.isZero()) 10838f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov return This; 10848f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 10858f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov unsigned AS = cast<llvm::PointerType>(This->getType())->getAddressSpace(); 10868f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov llvm::Type *charPtrTy = CGF.Int8Ty->getPointerTo(AS), 10878f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov *thisTy = This->getType(); 10888f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 10898f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov This = CGF.Builder.CreateBitCast(This, charPtrTy); 10908f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov assert(Adjustment.isPositive()); 10916d87e65b8fd01b36c7d3dd121462cb95f94404d6Timur Iskhodzhanov This = 10926d87e65b8fd01b36c7d3dd121462cb95f94404d6Timur Iskhodzhanov CGF.Builder.CreateConstInBoundsGEP1_32(This, -Adjustment.getQuantity()); 10938f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov return CGF.Builder.CreateBitCast(This, thisTy); 10948f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov} 10958f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 1096bd31574a0f01da2cb2abde004b36772eb8a048dcJohn McCallvoid MicrosoftCXXABI::EmitInstanceFunctionProlog(CodeGenFunction &CGF) { 1097bd31574a0f01da2cb2abde004b36772eb8a048dcJohn McCall EmitThisParam(CGF); 10983b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin 10993b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin /// If this is a function that the ABI specifies returns 'this', initialize 11003b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin /// the return slot to 'this' at the start of the function. 11013b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin /// 11023b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin /// Unlike the setting of return types, this is done within the ABI 11033b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin /// implementation instead of by clients of CGCXXABI because: 11043b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin /// 1) getThisValue is currently protected 11053b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin /// 2) in theory, an ABI could implement 'this' returns some other way; 11063b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin /// HasThisReturn only specifies a contract, not the implementation 11073b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin if (HasThisReturn(CGF.CurGD)) 1108bd31574a0f01da2cb2abde004b36772eb8a048dcJohn McCall CGF.Builder.CreateStore(getThisValue(CGF), CGF.ReturnValue); 11091d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov 11101d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov const CXXMethodDecl *MD = cast<CXXMethodDecl>(CGF.CurGD.getDecl()); 11111d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov if (isa<CXXConstructorDecl>(MD) && MD->getParent()->getNumVBases()) { 11121d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov assert(getStructorImplicitParamDecl(CGF) && 11131d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov "no implicit parameter for a constructor with virtual bases?"); 11141d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov getStructorImplicitParamValue(CGF) 11151d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov = CGF.Builder.CreateLoad( 11161d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov CGF.GetAddrOfLocalVar(getStructorImplicitParamDecl(CGF)), 11171d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov "is_most_derived"); 11181d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov } 11191d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov 112059660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov if (IsDeletingDtor(CGF.CurGD)) { 112159660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov assert(getStructorImplicitParamDecl(CGF) && 112259660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov "no implicit parameter for a deleting destructor?"); 112359660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov getStructorImplicitParamValue(CGF) 112459660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov = CGF.Builder.CreateLoad( 112559660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov CGF.GetAddrOfLocalVar(getStructorImplicitParamDecl(CGF)), 112659660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov "should_call_delete"); 112759660c21178b6af518bd4b564e032d5c9cc218cbTimur Iskhodzhanov } 1128bd31574a0f01da2cb2abde004b36772eb8a048dcJohn McCall} 1129bd31574a0f01da2cb2abde004b36772eb8a048dcJohn McCall 1130651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesunsigned MicrosoftCXXABI::addImplicitConstructorArgs( 1131651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CodeGenFunction &CGF, const CXXConstructorDecl *D, CXXCtorType Type, 1132651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool ForVirtualBase, bool Delegating, CallArgList &Args) { 11331d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov assert(Type == Ctor_Complete || Type == Ctor_Base); 11341d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov 1135651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Check if we need a 'most_derived' parameter. 1136651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (!D->getParent()->getNumVBases()) 1137651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return 0; 1138651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1139651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Add the 'most_derived' argument second if we are variadic or last if not. 1140651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const FunctionProtoType *FPT = D->getType()->castAs<FunctionProtoType>(); 1141651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *MostDerivedArg = 1142651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::ConstantInt::get(CGM.Int32Ty, Type == Ctor_Complete); 1143651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines RValue RV = RValue::get(MostDerivedArg); 1144651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MostDerivedArg) { 1145651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (FPT->isVariadic()) 1146651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Args.insert(Args.begin() + 1, 1147651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CallArg(RV, getContext().IntTy, /*needscopy=*/false)); 1148651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines else 1149651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Args.add(RV, getContext().IntTy); 1150651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } 1151651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1152651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return 1; // Added one arg. 1153651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines} 1154651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1155651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesvoid MicrosoftCXXABI::EmitDestructorCall(CodeGenFunction &CGF, 1156651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXDestructorDecl *DD, 1157651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CXXDtorType Type, bool ForVirtualBase, 1158651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool Delegating, llvm::Value *This) { 1159651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *Callee = CGM.GetAddrOfCXXDestructor(DD, Type); 1160651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1161651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (DD->isVirtual()) { 1162651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines assert(Type != CXXDtorType::Dtor_Deleting && 1163651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines "The deleting destructor should only be called via a virtual call"); 1164651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines This = adjustThisArgumentForVirtualFunctionCall(CGF, GlobalDecl(DD, Type), 1165651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines This, false); 11661d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov } 11671d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov 11681d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov // FIXME: Provide a source location here. 1169651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGF.EmitCXXMemberCall(DD, SourceLocation(), Callee, ReturnValueSlot(), This, 11706bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines /*ImplicitParam=*/nullptr, 11716bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines /*ImplicitParamTy=*/QualType(), nullptr, nullptr); 11721d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov} 11731d4fff5551c2347010b955b4337a2aa7d65a050eTimur Iskhodzhanov 1174a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanovvoid MicrosoftCXXABI::emitVTableDefinitions(CodeGenVTables &CGVT, 1175a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov const CXXRecordDecl *RD) { 11765f0db587078b5af32fc9ac41fe4276b80918fd8dTimur Iskhodzhanov MicrosoftVTableContext &VFTContext = CGM.getMicrosoftVTableContext(); 1177651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines VPtrInfoVector VFPtrs = VFTContext.getVFPtrOffsets(RD); 1178a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 11796bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines for (VPtrInfo *Info : VFPtrs) { 11806bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::GlobalVariable *VTable = getAddrOfVTable(RD, Info->FullOffsetInMDC); 1181a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov if (VTable->hasInitializer()) 1182a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov continue; 1183ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 1184ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *RTTI = getMSCompleteObjectLocator(RD, Info); 1185a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1186a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov const VTableLayout &VTLayout = 11876bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines VFTContext.getVFTableLayout(RD, Info->FullOffsetInMDC); 1188a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov llvm::Constant *Init = CGVT.CreateVTableInitializer( 1189a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov RD, VTLayout.vtable_component_begin(), 1190a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov VTLayout.getNumVTableComponents(), VTLayout.vtable_thunk_begin(), 1191ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VTLayout.getNumVTableThunks(), RTTI); 1192a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1193ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VTable->setInitializer(Init); 1194a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov } 1195a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov} 1196a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1197a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanovllvm::Value *MicrosoftCXXABI::getVTableAddressPointInStructor( 1198a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov CodeGenFunction &CGF, const CXXRecordDecl *VTableClass, BaseSubobject Base, 1199a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov const CXXRecordDecl *NearestVBase, bool &NeedsVirtualOffset) { 12006bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines NeedsVirtualOffset = (NearestVBase != nullptr); 1201a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1202ef8225444452a1486bd721f3285301fe84643b00Stephen Hines (void)getAddrOfVTable(VTableClass, Base.getBaseOffset()); 1203ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VFTableIdTy ID(VTableClass, Base.getBaseOffset()); 1204ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalValue *VTableAddressPoint = VFTablesMap[ID]; 1205a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov if (!VTableAddressPoint) { 1206a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov assert(Base.getBase()->getNumVBases() && 1207a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov !CGM.getContext().getASTRecordLayout(Base.getBase()).hasOwnVFPtr()); 1208a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov } 1209a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov return VTableAddressPoint; 1210a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov} 1211a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 121211f22a35b7f08a8d017f6ab26e440edffc930f96Timur Iskhodzhanovstatic void mangleVFTableName(MicrosoftMangleContext &MangleContext, 1213651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD, const VPtrInfo *VFPtr, 121411f22a35b7f08a8d017f6ab26e440edffc930f96Timur Iskhodzhanov SmallString<256> &Name) { 1215a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov llvm::raw_svector_ostream Out(Name); 1216651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MangleContext.mangleCXXVFTable(RD, VFPtr->MangledPath, Out); 1217a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov} 1218a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1219a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanovllvm::Constant *MicrosoftCXXABI::getVTableAddressPointForConstExpr( 1220a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov BaseSubobject Base, const CXXRecordDecl *VTableClass) { 1221ef8225444452a1486bd721f3285301fe84643b00Stephen Hines (void)getAddrOfVTable(VTableClass, Base.getBaseOffset()); 1222ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VFTableIdTy ID(VTableClass, Base.getBaseOffset()); 1223ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalValue *VFTable = VFTablesMap[ID]; 1224ef8225444452a1486bd721f3285301fe84643b00Stephen Hines assert(VFTable && "Couldn't find a vftable for the given base?"); 1225ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return VFTable; 1226a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov} 1227a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1228a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanovllvm::GlobalVariable *MicrosoftCXXABI::getAddrOfVTable(const CXXRecordDecl *RD, 1229a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov CharUnits VPtrOffset) { 1230a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov // getAddrOfVTable may return 0 if asked to get an address of a vtable which 1231a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov // shouldn't be used in the given record type. We want to cache this result in 1232a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov // VFTablesMap, thus a simple zero check is not sufficient. 1233a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov VFTableIdTy ID(RD, VPtrOffset); 1234ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VTablesMapTy::iterator I; 1235a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov bool Inserted; 1236ef8225444452a1486bd721f3285301fe84643b00Stephen Hines std::tie(I, Inserted) = VTablesMap.insert(std::make_pair(ID, nullptr)); 1237a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov if (!Inserted) 1238a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov return I->second; 1239a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1240a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov llvm::GlobalVariable *&VTable = I->second; 1241a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 12425f0db587078b5af32fc9ac41fe4276b80918fd8dTimur Iskhodzhanov MicrosoftVTableContext &VTContext = CGM.getMicrosoftVTableContext(); 1243651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const VPtrInfoVector &VFPtrs = VTContext.getVFPtrOffsets(RD); 1244a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1245a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov if (DeferredVFTables.insert(RD)) { 1246a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov // We haven't processed this record type before. 1247a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov // Queue up this v-table for possible deferred emission. 1248a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov CGM.addDeferredVTable(RD); 1249a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1250a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov#ifndef NDEBUG 1251a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov // Create all the vftables at once in order to make sure each vftable has 1252a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov // a unique mangled name. 1253a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov llvm::StringSet<> ObservedMangledNames; 1254a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov for (size_t J = 0, F = VFPtrs.size(); J != F; ++J) { 1255a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov SmallString<256> Name; 125611f22a35b7f08a8d017f6ab26e440edffc930f96Timur Iskhodzhanov mangleVFTableName(getMangleContext(), RD, VFPtrs[J], Name); 1257a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov if (!ObservedMangledNames.insert(Name.str())) 1258a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov llvm_unreachable("Already saw this mangling before?"); 1259a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov } 1260a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov#endif 1261a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov } 1262a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1263a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov for (size_t J = 0, F = VFPtrs.size(); J != F; ++J) { 1264651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (VFPtrs[J]->FullOffsetInMDC != VPtrOffset) 1265a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov continue; 1266ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SmallString<256> VFTableName; 1267ef8225444452a1486bd721f3285301fe84643b00Stephen Hines mangleVFTableName(getMangleContext(), RD, VFPtrs[J], VFTableName); 1268ef8225444452a1486bd721f3285301fe84643b00Stephen Hines StringRef VTableName = VFTableName; 1269a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1270ef8225444452a1486bd721f3285301fe84643b00Stephen Hines uint64_t NumVTableSlots = 1271651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines VTContext.getVFTableLayout(RD, VFPtrs[J]->FullOffsetInMDC) 1272ef8225444452a1486bd721f3285301fe84643b00Stephen Hines .getNumVTableComponents(); 1273ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalValue::LinkageTypes VTableLinkage = 1274ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalValue::ExternalLinkage; 1275ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ArrayType *VTableType = 1276ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ArrayType::get(CGM.Int8PtrTy, NumVTableSlots); 1277ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (getContext().getLangOpts().RTTIData) { 1278ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VTableLinkage = llvm::GlobalValue::PrivateLinkage; 1279ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VTableName = ""; 1280ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 1281ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 1282ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VTable = CGM.getModule().getNamedGlobal(VFTableName); 1283ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!VTable) { 1284ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Create a backing variable for the contents of VTable. The VTable may 1285ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // or may not include space for a pointer to RTTI data. 1286ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalValue *VFTable = VTable = new llvm::GlobalVariable( 1287ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.getModule(), VTableType, /*isConstant=*/true, VTableLinkage, 1288ef8225444452a1486bd721f3285301fe84643b00Stephen Hines /*Initializer=*/nullptr, VTableName); 1289ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VTable->setUnnamedAddr(true); 1290ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 1291ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Only insert a pointer into the VFTable for RTTI data if we are not 1292ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // importing it. We never reference the RTTI data directly so there is no 1293ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // need to make room for it. 1294ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (getContext().getLangOpts().RTTIData && 1295ef8225444452a1486bd721f3285301fe84643b00Stephen Hines !RD->hasAttr<DLLImportAttr>()) { 1296ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *GEPIndices[] = {llvm::ConstantInt::get(CGM.IntTy, 0), 1297ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, 1)}; 1298ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Create a GEP which points just after the first entry in the VFTable, 1299ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // this should be the location of the first virtual method. 1300ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *VTableGEP = 1301ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantExpr::getInBoundsGetElementPtr(VTable, GEPIndices); 1302ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // The symbol for the VFTable is an alias to the GEP. It is 1303ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // transparent, to other modules, what the nature of this symbol is; all 1304ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // that matters is that the alias be the address of the first virtual 1305ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // method. 1306ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VFTable = llvm::GlobalAlias::create( 1307ef8225444452a1486bd721f3285301fe84643b00Stephen Hines cast<llvm::SequentialType>(VTableGEP->getType())->getElementType(), 1308ef8225444452a1486bd721f3285301fe84643b00Stephen Hines /*AddressSpace=*/0, llvm::GlobalValue::ExternalLinkage, 1309ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VFTableName.str(), VTableGEP, &CGM.getModule()); 1310ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } else { 1311ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // We don't need a GlobalAlias to be a symbol for the VTable if we won't 1312ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // be referencing any RTTI data. The GlobalVariable will end up being 1313ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // an appropriate definition of the VFTable. 1314ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VTable->setName(VFTableName.str()); 1315ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 1316a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1317ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VFTable->setUnnamedAddr(true); 1318ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (RD->hasAttr<DLLImportAttr>()) 1319ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VFTable->setDLLStorageClass(llvm::GlobalValue::DLLImportStorageClass); 1320ef8225444452a1486bd721f3285301fe84643b00Stephen Hines else if (RD->hasAttr<DLLExportAttr>()) 1321ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VFTable->setDLLStorageClass(llvm::GlobalValue::DLLExportStorageClass); 1322ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 1323ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalValue::LinkageTypes VFTableLinkage = CGM.getVTableLinkage(RD); 1324ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (VFTable != VTable) { 1325ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (llvm::GlobalValue::isAvailableExternallyLinkage(VFTableLinkage)) { 1326ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // AvailableExternally implies that we grabbed the data from another 1327ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // executable. No need to stick the alias in a Comdat. 1328ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } else if (llvm::GlobalValue::isLocalLinkage(VFTableLinkage)) { 1329ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // If it's local, it means that the virtual function table can't be 1330ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // referenced in another translation unit. No need to stick the alias 1331ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // in a Comdat. 1332ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } else if (llvm::GlobalValue::isWeakODRLinkage(VFTableLinkage) || 1333ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalValue::isLinkOnceODRLinkage(VFTableLinkage)) { 1334ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // The alias is going to be dropped into a Comdat, no need to make it 1335ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // weak. 1336ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VFTableLinkage = llvm::GlobalValue::ExternalLinkage; 1337ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Comdat *C = 1338ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.getModule().getOrInsertComdat(VFTable->getName()); 1339ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // We must indicate which VFTable is larger to support linking between 1340ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // translation units which do and do not have RTTI data. The largest 1341ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // VFTable contains the RTTI data; translation units which reference 1342ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // the smaller VFTable always reference it relative to the first 1343ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // virtual method. 1344ef8225444452a1486bd721f3285301fe84643b00Stephen Hines C->setSelectionKind(llvm::Comdat::Largest); 1345ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VTable->setComdat(C); 1346ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } else { 1347ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm_unreachable("unexpected linkage for vftable!"); 1348ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 1349ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 1350ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VFTable->setLinkage(VFTableLinkage); 1351ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.setGlobalVisibility(VFTable, RD); 1352ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VFTablesMap[ID] = VFTable; 1353ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 1354a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov break; 1355a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov } 1356a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1357a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov return VTable; 1358a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov} 1359a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 13608f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanovllvm::Value *MicrosoftCXXABI::getVirtualFunctionPointer(CodeGenFunction &CGF, 13618f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov GlobalDecl GD, 13628f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov llvm::Value *This, 13638f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov llvm::Type *Ty) { 13648f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov GD = GD.getCanonicalDecl(); 13658f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov CGBuilderTy &Builder = CGF.Builder; 13668f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 13678f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov Ty = Ty->getPointerTo()->getPointerTo(); 1368651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *VPtr = 1369651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines adjustThisArgumentForVirtualFunctionCall(CGF, GD, This, true); 13708f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov llvm::Value *VTable = CGF.GetVTablePtr(VPtr, Ty); 13718f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 13725f0db587078b5af32fc9ac41fe4276b80918fd8dTimur Iskhodzhanov MicrosoftVTableContext::MethodVFTableLocation ML = 13735f0db587078b5af32fc9ac41fe4276b80918fd8dTimur Iskhodzhanov CGM.getMicrosoftVTableContext().getMethodVFTableLocation(GD); 13748f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov llvm::Value *VFuncPtr = 13758f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov Builder.CreateConstInBoundsGEP1_64(VTable, ML.Index, "vfn"); 13768f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov return Builder.CreateLoad(VFuncPtr); 13778f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov} 13788f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov 13793b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Linvoid MicrosoftCXXABI::EmitVirtualDestructorCall(CodeGenFunction &CGF, 13803b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin const CXXDestructorDecl *Dtor, 13813b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin CXXDtorType DtorType, 13823b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin SourceLocation CallLoc, 13833b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin llvm::Value *This) { 13840f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov assert(DtorType == Dtor_Deleting || DtorType == Dtor_Complete); 13850f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov 13860f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov // We have only one destructor in the vftable but can get both behaviors 13871f71f393e2d01f73d237e04677a82d4e0e6139efTimur Iskhodzhanov // by passing an implicit int parameter. 138882552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov GlobalDecl GD(Dtor, Dtor_Deleting); 13898f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov const CGFunctionInfo *FInfo = 13908f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov &CGM.getTypes().arrangeCXXDestructor(Dtor, Dtor_Deleting); 13910f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov llvm::Type *Ty = CGF.CGM.getTypes().GetFunctionType(*FInfo); 139282552742a1002cf1408d6f371efc9cc6a9f2d7ccTimur Iskhodzhanov llvm::Value *Callee = getVirtualFunctionPointer(CGF, GD, This, Ty); 13930f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov 13940f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov ASTContext &Context = CGF.getContext(); 13958f189a9911a992a5c4118c3789485a85bd96e045Timur Iskhodzhanov llvm::Value *ImplicitParam = 13961f71f393e2d01f73d237e04677a82d4e0e6139efTimur Iskhodzhanov llvm::ConstantInt::get(llvm::IntegerType::getInt32Ty(CGF.getLLVMContext()), 13970f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov DtorType == Dtor_Deleting); 13980f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov 1399651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines This = adjustThisArgumentForVirtualFunctionCall(CGF, GD, This, true); 14003b50e8d78c34fc57e25781015a2cb0536ca54f89Stephen Lin CGF.EmitCXXMemberCall(Dtor, CallLoc, Callee, ReturnValueSlot(), This, 14016bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines ImplicitParam, Context.IntTy, nullptr, nullptr); 14020f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov} 14030f9827f5d6248d7008063768eb5f2c3e6ba83e94Timur Iskhodzhanov 1404651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesconst VBTableGlobals & 1405651f13cea278ec967336033dd032faef0e9fc2ecStephen HinesMicrosoftCXXABI::enumerateVBTables(const CXXRecordDecl *RD) { 14069063302a82423cb83f002257a416741850739a70Reid Kleckner // At this layer, we can key the cache off of a single class, which is much 1407651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // easier than caching each vbtable individually. 1408651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::DenseMap<const CXXRecordDecl*, VBTableGlobals>::iterator Entry; 1409651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool Added; 1410651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines std::tie(Entry, Added) = 1411651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines VBTablesMap.insert(std::make_pair(RD, VBTableGlobals())); 1412651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines VBTableGlobals &VBGlobals = Entry->second; 1413651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (!Added) 1414651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return VBGlobals; 1415651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1416651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MicrosoftVTableContext &Context = CGM.getMicrosoftVTableContext(); 1417651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines VBGlobals.VBTables = &Context.enumerateVBTables(RD); 1418651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1419651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Cache the globals for all vbtables so we don't have to recompute the 1420651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // mangled names. 1421651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::GlobalVariable::LinkageTypes Linkage = CGM.getVTableLinkage(RD); 1422651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines for (VPtrInfoVector::const_iterator I = VBGlobals.VBTables->begin(), 1423651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines E = VBGlobals.VBTables->end(); 1424651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines I != E; ++I) { 1425651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines VBGlobals.Globals.push_back(getAddrOfVBTable(**I, RD, Linkage)); 1426651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } 14279063302a82423cb83f002257a416741850739a70Reid Kleckner 1428651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return VBGlobals; 14299063302a82423cb83f002257a416741850739a70Reid Kleckner} 14309063302a82423cb83f002257a416741850739a70Reid Kleckner 1431651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesllvm::Function *MicrosoftCXXABI::EmitVirtualMemPtrThunk( 1432651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXMethodDecl *MD, 1433651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const MicrosoftVTableContext::MethodVFTableLocation &ML) { 1434651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Calculate the mangled name. 1435651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines SmallString<256> ThunkName; 1436651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::raw_svector_ostream Out(ThunkName); 1437651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines getMangleContext().mangleVirtualMemPtrThunk(MD, Out); 1438651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Out.flush(); 1439651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 144093b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg // If the thunk has been generated previously, just return it. 144193b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg if (llvm::GlobalValue *GV = CGM.getModule().getNamedValue(ThunkName)) 144293b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg return cast<llvm::Function>(GV); 144393b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg 144493b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg // Create the llvm::Function. 144593b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg const CGFunctionInfo &FnInfo = CGM.getTypes().arrangeGlobalDeclaration(MD); 144693b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg llvm::FunctionType *ThunkTy = CGM.getTypes().GetFunctionType(FnInfo); 144793b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg llvm::Function *ThunkFn = 144893b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg llvm::Function::Create(ThunkTy, llvm::Function::ExternalLinkage, 144993b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg ThunkName.str(), &CGM.getModule()); 145093b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg assert(ThunkFn->getName() == ThunkName && "name was uniqued!"); 145193b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg 145293b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg ThunkFn->setLinkage(MD->isExternallyVisible() 145393b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg ? llvm::GlobalValue::LinkOnceODRLinkage 145493b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg : llvm::GlobalValue::InternalLinkage); 145593b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg 145693b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg CGM.SetLLVMFunctionAttributes(MD, FnInfo, ThunkFn); 145793b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg CGM.SetLLVMFunctionAttributesForDefinition(MD, ThunkFn); 145893b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg 145993b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg // Start codegen. 146093b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg CodeGenFunction CGF(CGM); 146193b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg CGF.StartThunk(ThunkFn, MD, FnInfo); 146293b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg 1463651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Load the vfptr and then callee from the vftable. The callee should have 1464651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // adjusted 'this' so that the vfptr is at offset zero. 146593b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg llvm::Value *This = CGF.LoadCXXThis(); 1466651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *VTable = 1467651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGF.GetVTablePtr(This, ThunkTy->getPointerTo()->getPointerTo()); 1468651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *VFuncPtr = 1469651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGF.Builder.CreateConstInBoundsGEP1_64(VTable, ML.Index, "vfn"); 1470651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *Callee = CGF.Builder.CreateLoad(VFuncPtr); 147193b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg 14726bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines unsigned CallingConv; 14736bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CodeGen::AttributeListType AttributeList; 14746bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CGM.ConstructAttributeList(FnInfo, MD, AttributeList, CallingConv, true); 14756bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::AttributeSet Attrs = 14766bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::AttributeSet::get(CGF.getLLVMContext(), AttributeList); 14776bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 14786bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // Do a musttail call with perfect argument forwarding. Any inalloca argument 14796bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // will be forwarded in place without any copy. 14806bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines SmallVector<llvm::Value *, 8> Args; 14816bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines for (llvm::Argument &A : ThunkFn->args()) 14826bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines Args.push_back(&A); 14836bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::CallInst *Call = CGF.Builder.CreateCall(Callee, Args); 14846bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines Call->setTailCallKind(llvm::CallInst::TCK_MustTail); 14856bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines Call->setAttributes(Attrs); 14866bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines Call->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 14876bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 14886bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (Call->getType()->isVoidTy()) 14896bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CGF.Builder.CreateRetVoid(); 14906bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines else 14916bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CGF.Builder.CreateRet(Call); 14926bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 14936bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // Finish the function to maintain CodeGenFunction invariants. 14946bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // FIXME: Don't emit unreachable code. 14956bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CGF.EmitBlock(CGF.createBasicBlock()); 14966bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CGF.FinishFunction(); 149793b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg 149893b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg return ThunkFn; 149993b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg} 150093b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg 1501a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanovvoid MicrosoftCXXABI::emitVirtualInheritanceTables(const CXXRecordDecl *RD) { 1502651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const VBTableGlobals &VBGlobals = enumerateVBTables(RD); 1503651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines for (unsigned I = 0, E = VBGlobals.VBTables->size(); I != E; ++I) { 1504651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const VPtrInfo *VBT = (*VBGlobals.VBTables)[I]; 1505651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::GlobalVariable *GV = VBGlobals.Globals[I]; 1506651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines emitVBTableDefinition(*VBT, RD, GV); 1507651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } 1508651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines} 1509a53d7a0259ff88f78ba8ecac7d0cb3ea96302b1dTimur Iskhodzhanov 1510651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesllvm::GlobalVariable * 1511651f13cea278ec967336033dd032faef0e9fc2ecStephen HinesMicrosoftCXXABI::getAddrOfVBTable(const VPtrInfo &VBT, const CXXRecordDecl *RD, 1512651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::GlobalVariable::LinkageTypes Linkage) { 1513651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines SmallString<256> OutName; 1514651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::raw_svector_ostream Out(OutName); 1515ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getMangleContext().mangleCXXVBTable(RD, VBT.MangledPath, Out); 1516651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Out.flush(); 1517651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines StringRef Name = OutName.str(); 1518651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1519651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::ArrayType *VBTableType = 1520651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::ArrayType::get(CGM.IntTy, 1 + VBT.ReusingBase->getNumVBases()); 1521651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1522651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines assert(!CGM.getModule().getNamedGlobal(Name) && 1523651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines "vbtable with this name already exists: mangling bug?"); 1524651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::GlobalVariable *GV = 1525651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGM.CreateOrReplaceCXXRuntimeVariable(Name, VBTableType, Linkage); 1526651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines GV->setUnnamedAddr(true); 1527ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 1528ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (RD->hasAttr<DLLImportAttr>()) 1529ef8225444452a1486bd721f3285301fe84643b00Stephen Hines GV->setDLLStorageClass(llvm::GlobalValue::DLLImportStorageClass); 1530ef8225444452a1486bd721f3285301fe84643b00Stephen Hines else if (RD->hasAttr<DLLExportAttr>()) 1531ef8225444452a1486bd721f3285301fe84643b00Stephen Hines GV->setDLLStorageClass(llvm::GlobalValue::DLLExportStorageClass); 1532ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 1533651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return GV; 1534651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines} 1535651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1536651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesvoid MicrosoftCXXABI::emitVBTableDefinition(const VPtrInfo &VBT, 1537651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD, 1538651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::GlobalVariable *GV) const { 1539651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *ReusingBase = VBT.ReusingBase; 1540651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1541651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines assert(RD->getNumVBases() && ReusingBase->getNumVBases() && 1542651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines "should only emit vbtables for classes with vbtables"); 1543651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1544651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const ASTRecordLayout &BaseLayout = 1545651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGM.getContext().getASTRecordLayout(VBT.BaseWithVPtr); 1546651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const ASTRecordLayout &DerivedLayout = 1547651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGM.getContext().getASTRecordLayout(RD); 1548651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 15496bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines SmallVector<llvm::Constant *, 4> Offsets(1 + ReusingBase->getNumVBases(), 15506bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines nullptr); 1551651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1552651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // The offset from ReusingBase's vbptr to itself always leads. 1553651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits VBPtrOffset = BaseLayout.getVBPtrOffset(); 1554651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Offsets[0] = llvm::ConstantInt::get(CGM.IntTy, -VBPtrOffset.getQuantity()); 1555651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1556651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MicrosoftVTableContext &Context = CGM.getMicrosoftVTableContext(); 1557651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines for (const auto &I : ReusingBase->vbases()) { 1558651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *VBase = I.getType()->getAsCXXRecordDecl(); 1559651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits Offset = DerivedLayout.getVBaseClassOffset(VBase); 1560651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines assert(!Offset.isNegative()); 1561651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1562651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Make it relative to the subobject vbptr. 1563651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits CompleteVBPtrOffset = VBT.NonVirtualOffset + VBPtrOffset; 1564651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (VBT.getVBaseWithVPtr()) 1565651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CompleteVBPtrOffset += 1566651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines DerivedLayout.getVBaseClassOffset(VBT.getVBaseWithVPtr()); 1567651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Offset -= CompleteVBPtrOffset; 1568651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1569651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines unsigned VBIndex = Context.getVBTableIndex(ReusingBase, VBase); 15706bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines assert(Offsets[VBIndex] == nullptr && "The same vbindex seen twice?"); 1571651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Offsets[VBIndex] = llvm::ConstantInt::get(CGM.IntTy, Offset.getQuantity()); 15729063302a82423cb83f002257a416741850739a70Reid Kleckner } 1573651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1574651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines assert(Offsets.size() == 1575651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines cast<llvm::ArrayType>(cast<llvm::PointerType>(GV->getType()) 1576651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines ->getElementType())->getNumElements()); 1577651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::ArrayType *VBTableType = 1578651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::ArrayType::get(CGM.IntTy, Offsets.size()); 1579651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Constant *Init = llvm::ConstantArray::get(VBTableType, Offsets); 1580651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines GV->setInitializer(Init); 1581651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1582651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Set the right visibility. 1583651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CGM.setGlobalVisibility(GV, RD); 15849063302a82423cb83f002257a416741850739a70Reid Kleckner} 15859063302a82423cb83f002257a416741850739a70Reid Kleckner 1586c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanovllvm::Value *MicrosoftCXXABI::performThisAdjustment(CodeGenFunction &CGF, 1587c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov llvm::Value *This, 1588c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov const ThisAdjustment &TA) { 1589c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov if (TA.isEmpty()) 1590c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov return This; 1591c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 1592c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov llvm::Value *V = CGF.Builder.CreateBitCast(This, CGF.Int8PtrTy); 1593c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 159458b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov if (!TA.Virtual.isEmpty()) { 159558b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov assert(TA.Virtual.Microsoft.VtordispOffset < 0); 159658b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov // Adjust the this argument based on the vtordisp value. 159758b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov llvm::Value *VtorDispPtr = 159858b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov CGF.Builder.CreateConstGEP1_32(V, TA.Virtual.Microsoft.VtordispOffset); 159958b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov VtorDispPtr = 160058b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov CGF.Builder.CreateBitCast(VtorDispPtr, CGF.Int32Ty->getPointerTo()); 160158b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov llvm::Value *VtorDisp = CGF.Builder.CreateLoad(VtorDispPtr, "vtordisp"); 160258b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov V = CGF.Builder.CreateGEP(V, CGF.Builder.CreateNeg(VtorDisp)); 160358b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov 160458b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov if (TA.Virtual.Microsoft.VBPtrOffset) { 160558b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov // If the final overrider is defined in a virtual base other than the one 160658b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov // that holds the vfptr, we have to use a vtordispex thunk which looks up 160758b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov // the vbtable of the derived class. 160858b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov assert(TA.Virtual.Microsoft.VBPtrOffset > 0); 160958b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov assert(TA.Virtual.Microsoft.VBOffsetOffset >= 0); 161058b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov llvm::Value *VBPtr; 161158b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov llvm::Value *VBaseOffset = 161258b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov GetVBaseOffsetFromVBPtr(CGF, V, -TA.Virtual.Microsoft.VBPtrOffset, 161358b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov TA.Virtual.Microsoft.VBOffsetOffset, &VBPtr); 161458b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov V = CGF.Builder.CreateInBoundsGEP(VBPtr, VBaseOffset); 161558b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov } 161658b6db76adab8dee2e64fbc300360f9b46c561baTimur Iskhodzhanov } 1617c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 1618c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov if (TA.NonVirtual) { 1619c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov // Non-virtual adjustment might result in a pointer outside the allocated 1620c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov // object, e.g. if the final overrider class is laid out after the virtual 1621c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov // base that declares a method in the most derived class. 1622c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov V = CGF.Builder.CreateConstGEP1_32(V, TA.NonVirtual); 1623c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov } 1624c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 1625c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov // Don't need to bitcast back, the call CodeGen will handle this. 1626c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov return V; 1627c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov} 1628c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 1629c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanovllvm::Value * 1630c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur IskhodzhanovMicrosoftCXXABI::performReturnAdjustment(CodeGenFunction &CGF, llvm::Value *Ret, 1631c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov const ReturnAdjustment &RA) { 1632c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov if (RA.isEmpty()) 1633c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov return Ret; 1634c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 1635c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov llvm::Value *V = CGF.Builder.CreateBitCast(Ret, CGF.Int8PtrTy); 1636c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 1637c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov if (RA.Virtual.Microsoft.VBIndex) { 1638c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov assert(RA.Virtual.Microsoft.VBIndex > 0); 1639c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov int32_t IntSize = 1640c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov getContext().getTypeSizeInChars(getContext().IntTy).getQuantity(); 1641c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov llvm::Value *VBPtr; 1642c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov llvm::Value *VBaseOffset = 1643c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov GetVBaseOffsetFromVBPtr(CGF, V, RA.Virtual.Microsoft.VBPtrOffset, 1644c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov IntSize * RA.Virtual.Microsoft.VBIndex, &VBPtr); 1645c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov V = CGF.Builder.CreateInBoundsGEP(VBPtr, VBaseOffset); 1646c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov } 1647c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 1648c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov if (RA.NonVirtual) 1649c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov V = CGF.Builder.CreateConstInBoundsGEP1_32(V, RA.NonVirtual); 1650c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 1651c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov // Cast back to the original type. 1652c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov return CGF.Builder.CreateBitCast(V, Ret->getType()); 1653c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov} 1654c70cc5d90403f99ccce5cab3a6c022ad9cdcb66cTimur Iskhodzhanov 1655e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCallbool MicrosoftCXXABI::requiresArrayCookie(const CXXDeleteExpr *expr, 1656e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall QualType elementType) { 1657e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall // Microsoft seems to completely ignore the possibility of a 1658e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall // two-argument usual deallocation function. 1659e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall return elementType.isDestructedType(); 1660e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall} 1661e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall 1662e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCallbool MicrosoftCXXABI::requiresArrayCookie(const CXXNewExpr *expr) { 1663e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall // Microsoft seems to completely ignore the possibility of a 1664e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall // two-argument usual deallocation function. 1665e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall return expr->getAllocatedType().isDestructedType(); 1666e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall} 1667e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall 1668e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCallCharUnits MicrosoftCXXABI::getArrayCookieSizeImpl(QualType type) { 1669e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall // The array cookie is always a size_t; we then pad that out to the 1670e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall // alignment of the element type. 1671e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall ASTContext &Ctx = getContext(); 1672e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall return std::max(Ctx.getTypeSizeInChars(Ctx.getSizeType()), 1673e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall Ctx.getTypeAlignInChars(type)); 1674e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall} 1675e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall 1676e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCallllvm::Value *MicrosoftCXXABI::readArrayCookieImpl(CodeGenFunction &CGF, 1677e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall llvm::Value *allocPtr, 1678e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall CharUnits cookieSize) { 1679956a5a17713deb1b5b27893303c4f308a1bd2a62Micah Villmow unsigned AS = allocPtr->getType()->getPointerAddressSpace(); 1680e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall llvm::Value *numElementsPtr = 1681e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall CGF.Builder.CreateBitCast(allocPtr, CGF.SizeTy->getPointerTo(AS)); 1682e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall return CGF.Builder.CreateLoad(numElementsPtr); 1683e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall} 1684e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall 1685e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCallllvm::Value* MicrosoftCXXABI::InitializeArrayCookie(CodeGenFunction &CGF, 1686e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall llvm::Value *newPtr, 1687e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall llvm::Value *numElements, 1688e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall const CXXNewExpr *expr, 1689e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall QualType elementType) { 1690e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall assert(requiresArrayCookie(expr)); 1691e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall 1692e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall // The size of the cookie. 1693e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall CharUnits cookieSize = getArrayCookieSizeImpl(elementType); 1694e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall 1695e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall // Compute an offset to the cookie. 1696e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall llvm::Value *cookiePtr = newPtr; 1697e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall 1698e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall // Write the number of elements into the appropriate slot. 1699956a5a17713deb1b5b27893303c4f308a1bd2a62Micah Villmow unsigned AS = newPtr->getType()->getPointerAddressSpace(); 1700e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall llvm::Value *numElementsPtr 1701e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall = CGF.Builder.CreateBitCast(cookiePtr, CGF.SizeTy->getPointerTo(AS)); 1702e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall CGF.Builder.CreateStore(numElements, numElementsPtr); 1703e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall 1704e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall // Finally, compute a pointer to the actual data buffer by skipping 1705e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall // over the cookie completely. 1706e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall return CGF.Builder.CreateConstInBoundsGEP1_64(newPtr, 1707e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall cookieSize.getQuantity()); 1708e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall} 1709e2b45e2a43ae46bc00026b63ba7c04ef2b78c3ffJohn McCall 171020bb175cb8ae5844034828db094fb948c0e3454aJohn McCallvoid MicrosoftCXXABI::EmitGuardedInit(CodeGenFunction &CGF, const VarDecl &D, 1711942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner llvm::GlobalVariable *GV, 171220bb175cb8ae5844034828db094fb948c0e3454aJohn McCall bool PerformInit) { 17136bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // MSVC only uses guards for static locals. 17146bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (!D.isStaticLocal()) { 17156bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines assert(GV->hasWeakLinkage() || GV->hasLinkOnceLinkage()); 17166bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // GlobalOpt is allowed to discard the initializer, so use linkonce_odr. 17176bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CGF.CurFn->setLinkage(llvm::GlobalValue::LinkOnceODRLinkage); 17186bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CGF.EmitCXXGlobalVarDeclInit(D, GV, PerformInit); 17196bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return; 17206bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines } 17216bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 1722942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // MSVC always uses an i32 bitfield to guard initialization, which is *not* 1723942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // threadsafe. Since the user may be linking in inline functions compiled by 1724942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // cl.exe, there's no reason to provide a false sense of security by using 1725942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // critical sections here. 172620bb175cb8ae5844034828db094fb948c0e3454aJohn McCall 172704e517650569598e847c2ab609672e6df93effe5Richard Smith if (D.getTLSKind()) 172804e517650569598e847c2ab609672e6df93effe5Richard Smith CGM.ErrorUnsupported(&D, "dynamic TLS initialization"); 172904e517650569598e847c2ab609672e6df93effe5Richard Smith 1730942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner CGBuilderTy &Builder = CGF.Builder; 1731942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner llvm::IntegerType *GuardTy = CGF.Int32Ty; 1732942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner llvm::ConstantInt *Zero = llvm::ConstantInt::get(GuardTy, 0); 1733942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner 1734942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // Get the guard variable for this function if we have one already. 17356bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines GuardInfo *GI = &GuardVariableMap[D.getDeclContext()]; 1736942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner 1737942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner unsigned BitIndex; 17386bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (D.isStaticLocal() && D.isExternallyVisible()) { 1739942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // Externally visible variables have to be numbered in Sema to properly 1740942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // handle unreachable VarDecls. 1741651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines BitIndex = getContext().getStaticLocalNumber(&D); 1742942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner assert(BitIndex > 0); 1743942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner BitIndex--; 1744942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner } else { 1745942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // Non-externally visible variables are numbered here in CodeGen. 17466bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines BitIndex = GI->BitIndex++; 1747942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner } 1748942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner 1749942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner if (BitIndex >= 32) { 1750942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner if (D.isExternallyVisible()) 1751942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner ErrorUnsupportedABI(CGF, "more than 32 guarded initializations"); 1752942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner BitIndex %= 32; 17536bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines GI->Guard = nullptr; 1754942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner } 1755942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner 1756942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // Lazily create the i32 bitfield for this function. 17576bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (!GI->Guard) { 1758942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // Mangle the name for the guard. 1759942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner SmallString<256> GuardName; 1760942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner { 1761942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner llvm::raw_svector_ostream Out(GuardName); 1762942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner getMangleContext().mangleStaticGuardVariable(&D, Out); 1763942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner Out.flush(); 1764942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner } 1765942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner 1766ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Create the guard variable with a zero-initializer. Just absorb linkage, 1767ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // visibility and dll storage class from the guarded variable. 17686bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines GI->Guard = 17696bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines new llvm::GlobalVariable(CGM.getModule(), GuardTy, false, 17706bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines GV->getLinkage(), Zero, GuardName.str()); 17716bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines GI->Guard->setVisibility(GV->getVisibility()); 1772ef8225444452a1486bd721f3285301fe84643b00Stephen Hines GI->Guard->setDLLStorageClass(GV->getDLLStorageClass()); 1773942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner } else { 17746bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines assert(GI->Guard->getLinkage() == GV->getLinkage() && 1775942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner "static local from the same function had different linkage"); 1776942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner } 1777942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner 1778942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // Pseudo code for the test: 1779942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // if (!(GuardVar & MyGuardBit)) { 1780942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // GuardVar |= MyGuardBit; 1781942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // ... initialize the object ...; 1782942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // } 1783942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner 1784942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // Test our bit from the guard variable. 1785942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner llvm::ConstantInt *Bit = llvm::ConstantInt::get(GuardTy, 1U << BitIndex); 17866bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::LoadInst *LI = Builder.CreateLoad(GI->Guard); 1787942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner llvm::Value *IsInitialized = 1788942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner Builder.CreateICmpNE(Builder.CreateAnd(LI, Bit), Zero); 1789942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner llvm::BasicBlock *InitBlock = CGF.createBasicBlock("init"); 1790942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner llvm::BasicBlock *EndBlock = CGF.createBasicBlock("init.end"); 1791942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner Builder.CreateCondBr(IsInitialized, EndBlock, InitBlock); 1792942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner 1793942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // Set our bit in the guard variable and emit the initializer and add a global 1794942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // destructor if appropriate. 1795942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner CGF.EmitBlock(InitBlock); 17966bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines Builder.CreateStore(Builder.CreateOr(LI, Bit), GI->Guard); 1797942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner CGF.EmitCXXGlobalVarDeclInit(D, GV, PerformInit); 1798942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner Builder.CreateBr(EndBlock); 1799942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner 1800942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner // Continue. 1801942f9fe11d3a9583eef6bc4ca2549b1f0d1694daReid Kleckner CGF.EmitBlock(EndBlock); 180220bb175cb8ae5844034828db094fb948c0e3454aJohn McCall} 180320bb175cb8ae5844034828db094fb948c0e3454aJohn McCall 1804a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Klecknerbool MicrosoftCXXABI::isZeroInitializable(const MemberPointerType *MPT) { 1805a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // Null-ness for function memptrs only depends on the first field, which is 1806a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // the function pointer. The rest don't matter, so we can zero initialize. 1807a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (MPT->isMemberFunctionPointer()) 1808a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return true; 1809a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 1810a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // The virtual base adjustment field is always -1 for null, so if we have one 1811a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // we can't zero initialize. The field offset is sometimes also -1 if 0 is a 1812a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // valid field offset. 1813651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl(); 1814651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MSInheritanceAttr::Spelling Inheritance = RD->getMSInheritanceModel(); 1815651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return (!MSInheritanceAttr::hasVBTableOffsetField(Inheritance) && 1816651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines RD->nullFieldOffsetIsZero()); 1817a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner} 1818a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 1819a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Klecknerllvm::Type * 1820a3609b0c7685346308ed2c8022f94949bbfe7cdfReid KlecknerMicrosoftCXXABI::ConvertMemberPointerType(const MemberPointerType *MPT) { 1821651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl(); 1822651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MSInheritanceAttr::Spelling Inheritance = RD->getMSInheritanceModel(); 1823a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::SmallVector<llvm::Type *, 4> fields; 1824a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (MPT->isMemberFunctionPointer()) 1825a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(CGM.VoidPtrTy); // FunctionPointerOrVirtualThunk 1826a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner else 1827a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(CGM.IntTy); // FieldOffset 1828a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 1829651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasNVOffsetField(MPT->isMemberFunctionPointer(), 1830651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Inheritance)) 1831a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(CGM.IntTy); 1832651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBPtrOffsetField(Inheritance)) 1833a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(CGM.IntTy); 1834651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBTableOffsetField(Inheritance)) 1835a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(CGM.IntTy); // VirtualBaseAdjustmentOffset 1836a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 1837a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (fields.size() == 1) 1838a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return fields[0]; 1839a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return llvm::StructType::get(CGM.getLLVMContext(), fields); 1840a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner} 1841a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 1842a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Klecknervoid MicrosoftCXXABI:: 1843a3609b0c7685346308ed2c8022f94949bbfe7cdfReid KlecknerGetNullMemberPointerFields(const MemberPointerType *MPT, 1844a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::SmallVectorImpl<llvm::Constant *> &fields) { 1845a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner assert(fields.empty()); 1846651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl(); 1847651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MSInheritanceAttr::Spelling Inheritance = RD->getMSInheritanceModel(); 1848a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (MPT->isMemberFunctionPointer()) { 1849a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // FunctionPointerOrVirtualThunk 1850a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(llvm::Constant::getNullValue(CGM.VoidPtrTy)); 1851a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner } else { 1852651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (RD->nullFieldOffsetIsZero()) 1853a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(getZeroInt()); // FieldOffset 1854a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner else 1855a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(getAllOnesInt()); // FieldOffset 1856a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner } 1857a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 1858651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasNVOffsetField(MPT->isMemberFunctionPointer(), 1859651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Inheritance)) 1860a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(getZeroInt()); 1861651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBPtrOffsetField(Inheritance)) 1862a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(getZeroInt()); 1863651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBTableOffsetField(Inheritance)) 1864a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(getAllOnesInt()); 1865a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner} 1866a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 1867a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Klecknerllvm::Constant * 1868a8a0f769ff4113a7f98c232fb0fc773a65371559Reid KlecknerMicrosoftCXXABI::EmitNullMemberPointer(const MemberPointerType *MPT) { 1869a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::SmallVector<llvm::Constant *, 4> fields; 1870a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner GetNullMemberPointerFields(MPT, fields); 1871a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (fields.size() == 1) 1872a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return fields[0]; 1873a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Constant *Res = llvm::ConstantStruct::getAnon(fields); 1874a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner assert(Res->getType() == ConvertMemberPointerType(MPT)); 1875a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return Res; 1876a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner} 1877a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 1878a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Klecknerllvm::Constant * 187979e0291be71adb4c38431e27a683faa40bbedc61Reid KlecknerMicrosoftCXXABI::EmitFullMemberPointer(llvm::Constant *FirstField, 188079e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner bool IsMemberFunction, 1881f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner const CXXRecordDecl *RD, 1882f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner CharUnits NonVirtualBaseAdjustment) 188379e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner{ 1884651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MSInheritanceAttr::Spelling Inheritance = RD->getMSInheritanceModel(); 188579e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner 188679e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner // Single inheritance class member pointer are represented as scalars instead 188779e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner // of aggregates. 1888651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasOnlyOneField(IsMemberFunction, Inheritance)) 188979e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner return FirstField; 189079e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner 1891a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::SmallVector<llvm::Constant *, 4> fields; 189279e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner fields.push_back(FirstField); 189379e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner 1894651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasNVOffsetField(IsMemberFunction, Inheritance)) 1895f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner fields.push_back(llvm::ConstantInt::get( 1896f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner CGM.IntTy, NonVirtualBaseAdjustment.getQuantity())); 189779e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner 1898651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBPtrOffsetField(Inheritance)) { 189942090d6d786accb3551097f0ef1f15d44713982cReid Kleckner CharUnits Offs = CharUnits::Zero(); 190042090d6d786accb3551097f0ef1f15d44713982cReid Kleckner if (RD->getNumVBases()) 1901651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Offs = getContext().getASTRecordLayout(RD).getVBPtrOffset(); 190242090d6d786accb3551097f0ef1f15d44713982cReid Kleckner fields.push_back(llvm::ConstantInt::get(CGM.IntTy, Offs.getQuantity())); 1903a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner } 190479e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner 190579e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner // The rest of the fields are adjusted by conversions to a more derived class. 1906651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBTableOffsetField(Inheritance)) 1907a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(getZeroInt()); 190879e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner 1909a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return llvm::ConstantStruct::getAnon(fields); 1910a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner} 1911a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 191279e0291be71adb4c38431e27a683faa40bbedc61Reid Klecknerllvm::Constant * 191379e0291be71adb4c38431e27a683faa40bbedc61Reid KlecknerMicrosoftCXXABI::EmitMemberDataPointer(const MemberPointerType *MPT, 191479e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner CharUnits offset) { 1915651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl(); 191679e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner llvm::Constant *FirstField = 191779e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner llvm::ConstantInt::get(CGM.IntTy, offset.getQuantity()); 1918f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return EmitFullMemberPointer(FirstField, /*IsMemberFunction=*/false, RD, 1919f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner CharUnits::Zero()); 1920f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner} 1921f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 1922f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Klecknerllvm::Constant *MicrosoftCXXABI::EmitMemberPointer(const CXXMethodDecl *MD) { 1923f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return BuildMemberPointer(MD->getParent(), MD, CharUnits::Zero()); 1924f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner} 1925f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 1926f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Klecknerllvm::Constant *MicrosoftCXXABI::EmitMemberPointer(const APValue &MP, 1927f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner QualType MPType) { 1928f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner const MemberPointerType *MPT = MPType->castAs<MemberPointerType>(); 1929f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner const ValueDecl *MPD = MP.getMemberPointerDecl(); 1930f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (!MPD) 1931f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return EmitNullMemberPointer(MPT); 1932f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 1933f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner CharUnits ThisAdjustment = getMemberPointerPathAdjustment(MP); 1934f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 1935f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // FIXME PR15713: Support virtual inheritance paths. 1936f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 1937f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(MPD)) 1938651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return BuildMemberPointer(MPT->getMostRecentCXXRecordDecl(), MD, 1939651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines ThisAdjustment); 1940f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 1941f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner CharUnits FieldOffset = 1942f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner getContext().toCharUnitsFromBits(getContext().getFieldOffset(MPD)); 1943f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return EmitMemberDataPointer(MPT, ThisAdjustment + FieldOffset); 194479e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner} 194579e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner 194679e0291be71adb4c38431e27a683faa40bbedc61Reid Klecknerllvm::Constant * 1947f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid KlecknerMicrosoftCXXABI::BuildMemberPointer(const CXXRecordDecl *RD, 1948f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner const CXXMethodDecl *MD, 1949f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner CharUnits NonVirtualBaseAdjustment) { 195079e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner assert(MD->isInstance() && "Member function must not be static!"); 195179e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner MD = MD->getCanonicalDecl(); 1952651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines RD = RD->getMostRecentDecl(); 195379e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner CodeGenTypes &Types = CGM.getTypes(); 195479e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner 195579e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner llvm::Constant *FirstField; 195693b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg if (!MD->isVirtual()) { 195779e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner const FunctionProtoType *FPT = MD->getType()->castAs<FunctionProtoType>(); 195879e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner llvm::Type *Ty; 195979e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner // Check whether the function has a computable LLVM signature. 196079e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner if (Types.isFuncTypeConvertible(FPT)) { 196179e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner // The function has a computable LLVM signature; use the correct type. 196279e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner Ty = Types.GetFunctionType(Types.arrangeCXXMethodDeclaration(MD)); 196379e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner } else { 196479e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner // Use an arbitrary non-function type to tell GetAddrOfFunction that the 196579e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner // function type is incomplete. 196679e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner Ty = CGM.PtrDiffTy; 196779e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner } 196879e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner FirstField = CGM.GetAddrOfFunction(MD, Ty); 196979e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner FirstField = llvm::ConstantExpr::getBitCast(FirstField, CGM.VoidPtrTy); 197093b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg } else { 197193b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg MicrosoftVTableContext::MethodVFTableLocation ML = 197293b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg CGM.getMicrosoftVTableContext().getMethodVFTableLocation(MD); 197393b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg if (MD->isVariadic()) { 197493b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg CGM.ErrorUnsupported(MD, "pointer to variadic virtual member function"); 197593b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg FirstField = llvm::Constant::getNullValue(CGM.VoidPtrTy); 197693b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg } else if (!CGM.getTypes().isFuncTypeConvertible( 197793b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg MD->getType()->castAs<FunctionType>())) { 197893b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg CGM.ErrorUnsupported(MD, "pointer to virtual member function with " 197993b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg "incomplete return or parameter type"); 198093b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg FirstField = llvm::Constant::getNullValue(CGM.VoidPtrTy); 198193b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg } else if (ML.VBase) { 198293b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg CGM.ErrorUnsupported(MD, "pointer to virtual member function overriding " 198393b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg "member function in virtual base class"); 198493b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg FirstField = llvm::Constant::getNullValue(CGM.VoidPtrTy); 198593b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg } else { 1986651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Function *Thunk = EmitVirtualMemPtrThunk(MD, ML); 198793b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg FirstField = llvm::ConstantExpr::getBitCast(Thunk, CGM.VoidPtrTy); 1988651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Include the vfptr adjustment if the method is in a non-primary vftable. 1989651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines NonVirtualBaseAdjustment += ML.VFPtrOffset; 199093b717ac956f5c82f7895ed8874cbd514c6d0a4eHans Wennborg } 199179e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner } 199279e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner 199379e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner // The rest of the fields are common with data member pointers. 1994f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return EmitFullMemberPointer(FirstField, /*IsMemberFunction=*/true, RD, 1995f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner NonVirtualBaseAdjustment); 199679e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner} 199779e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner 19983d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner/// Member pointers are the same if they're either bitwise identical *or* both 19993d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner/// null. Null-ness for function members is determined by the first field, 20003d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner/// while for data member pointers we must compare all fields. 20013d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Klecknerllvm::Value * 20023d2f000df9311bfccb6d2ac350be3d3efa5a412bReid KlecknerMicrosoftCXXABI::EmitMemberPointerComparison(CodeGenFunction &CGF, 20033d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::Value *L, 20043d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::Value *R, 20053d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner const MemberPointerType *MPT, 20063d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner bool Inequality) { 20073d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner CGBuilderTy &Builder = CGF.Builder; 20083d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner 20093d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner // Handle != comparisons by switching the sense of all boolean operations. 20103d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::ICmpInst::Predicate Eq; 20113d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::Instruction::BinaryOps And, Or; 20123d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner if (Inequality) { 20133d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner Eq = llvm::ICmpInst::ICMP_NE; 20143d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner And = llvm::Instruction::Or; 20153d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner Or = llvm::Instruction::And; 20163d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner } else { 20173d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner Eq = llvm::ICmpInst::ICMP_EQ; 20183d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner And = llvm::Instruction::And; 20193d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner Or = llvm::Instruction::Or; 20203d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner } 20213d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner 20223d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner // If this is a single field member pointer (single inheritance), this is a 20233d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner // single icmp. 2024651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl(); 2025651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MSInheritanceAttr::Spelling Inheritance = RD->getMSInheritanceModel(); 2026651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasOnlyOneField(MPT->isMemberFunctionPointer(), 2027651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Inheritance)) 20283d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner return Builder.CreateICmp(Eq, L, R); 20293d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner 20303d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner // Compare the first field. 20313d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::Value *L0 = Builder.CreateExtractValue(L, 0, "lhs.0"); 20323d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::Value *R0 = Builder.CreateExtractValue(R, 0, "rhs.0"); 20333d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::Value *Cmp0 = Builder.CreateICmp(Eq, L0, R0, "memptr.cmp.first"); 20343d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner 20353d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner // Compare everything other than the first field. 20366bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *Res = nullptr; 20373d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::StructType *LType = cast<llvm::StructType>(L->getType()); 20383d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner for (unsigned I = 1, E = LType->getNumElements(); I != E; ++I) { 20393d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::Value *LF = Builder.CreateExtractValue(L, I); 20403d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::Value *RF = Builder.CreateExtractValue(R, I); 20413d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::Value *Cmp = Builder.CreateICmp(Eq, LF, RF, "memptr.cmp.rest"); 20423d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner if (Res) 20433d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner Res = Builder.CreateBinOp(And, Res, Cmp); 20443d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner else 20453d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner Res = Cmp; 20463d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner } 20473d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner 20483d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner // Check if the first field is 0 if this is a function pointer. 20493d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner if (MPT->isMemberFunctionPointer()) { 20503d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner // (l1 == r1 && ...) || l0 == 0 20513d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::Value *Zero = llvm::Constant::getNullValue(L0->getType()); 20523d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner llvm::Value *IsZero = Builder.CreateICmp(Eq, L0, Zero, "memptr.cmp.iszero"); 20533d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner Res = Builder.CreateBinOp(Or, Res, IsZero); 20543d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner } 20553d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner 20563d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner // Combine the comparison of the first field, which must always be true for 20573d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner // this comparison to succeeed. 20583d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner return Builder.CreateBinOp(And, Res, Cmp0, "memptr.cmp"); 20593d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner} 20603d2f000df9311bfccb6d2ac350be3d3efa5a412bReid Kleckner 2061a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Klecknerllvm::Value * 2062a8a0f769ff4113a7f98c232fb0fc773a65371559Reid KlecknerMicrosoftCXXABI::EmitMemberPointerIsNotNull(CodeGenFunction &CGF, 2063a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner llvm::Value *MemPtr, 2064a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner const MemberPointerType *MPT) { 2065a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner CGBuilderTy &Builder = CGF.Builder; 2066a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::SmallVector<llvm::Constant *, 4> fields; 2067a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // We only need one field for member functions. 2068a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (MPT->isMemberFunctionPointer()) 2069a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner fields.push_back(llvm::Constant::getNullValue(CGM.VoidPtrTy)); 2070a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner else 2071a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner GetNullMemberPointerFields(MPT, fields); 2072a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner assert(!fields.empty()); 2073a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *FirstField = MemPtr; 2074a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (MemPtr->getType()->isStructTy()) 2075a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner FirstField = Builder.CreateExtractValue(MemPtr, 0); 2076a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *Res = Builder.CreateICmpNE(FirstField, fields[0], "memptr.cmp0"); 2077a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 2078a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // For function member pointers, we only need to test the function pointer 2079a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // field. The other fields if any can be garbage. 2080a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (MPT->isMemberFunctionPointer()) 2081a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return Res; 2082a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 2083a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // Otherwise, emit a series of compares and combine the results. 2084a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner for (int I = 1, E = fields.size(); I < E; ++I) { 2085a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *Field = Builder.CreateExtractValue(MemPtr, I); 2086a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *Next = Builder.CreateICmpNE(Field, fields[I], "memptr.cmp"); 20876bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines Res = Builder.CreateOr(Res, Next, "memptr.tobool"); 2088a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner } 2089a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return Res; 2090a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner} 2091a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 2092f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Klecknerbool MicrosoftCXXABI::MemberPointerConstantIsNull(const MemberPointerType *MPT, 2093f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Constant *Val) { 2094f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // Function pointers are null if the pointer in the first field is null. 2095f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (MPT->isMemberFunctionPointer()) { 2096f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Constant *FirstField = Val->getType()->isStructTy() ? 2097f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Val->getAggregateElement(0U) : Val; 2098f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return FirstField->isNullValue(); 2099f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner } 2100f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2101f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // If it's not a function pointer and it's zero initializable, we can easily 2102f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // check zero. 2103f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (isZeroInitializable(MPT) && Val->isNullValue()) 2104f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return true; 2105f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2106f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // Otherwise, break down all the fields for comparison. Hopefully these 2107f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // little Constants are reused, while a big null struct might not be. 2108f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::SmallVector<llvm::Constant *, 4> Fields; 2109f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner GetNullMemberPointerFields(MPT, Fields); 2110f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (Fields.size() == 1) { 2111f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner assert(Val->getType()->isIntegerTy()); 2112f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return Val == Fields[0]; 2113f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner } 2114f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2115f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner unsigned I, E; 2116f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner for (I = 0, E = Fields.size(); I != E; ++I) { 2117f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (Val->getAggregateElement(I) != Fields[I]) 2118f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner break; 2119f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner } 2120f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return I == E; 2121f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner} 2122f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2123b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Klecknerllvm::Value * 2124b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid KlecknerMicrosoftCXXABI::GetVBaseOffsetFromVBPtr(CodeGenFunction &CGF, 2125b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *This, 2126b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *VBPtrOffset, 21270e4f5598fedc333a05c0611fe3ad46266f5e1b5fTimur Iskhodzhanov llvm::Value *VBTableOffset, 2128b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value **VBPtrOut) { 2129b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner CGBuilderTy &Builder = CGF.Builder; 2130b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner // Load the vbtable pointer from the vbptr in the instance. 2131b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner This = Builder.CreateBitCast(This, CGM.Int8PtrTy); 2132b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *VBPtr = 2133b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner Builder.CreateInBoundsGEP(This, VBPtrOffset, "vbptr"); 2134b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner if (VBPtrOut) *VBPtrOut = VBPtr; 2135b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner VBPtr = Builder.CreateBitCast(VBPtr, CGM.Int8PtrTy->getPointerTo(0)); 2136b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *VBTable = Builder.CreateLoad(VBPtr, "vbtable"); 2137b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner 2138b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner // Load an i32 offset from the vb-table. 2139b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner llvm::Value *VBaseOffs = Builder.CreateInBoundsGEP(VBTable, VBTableOffset); 2140b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner VBaseOffs = Builder.CreateBitCast(VBaseOffs, CGM.Int32Ty->getPointerTo(0)); 2141b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner return Builder.CreateLoad(VBaseOffs, "vbase_offs"); 2142b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner} 2143b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner 2144a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner// Returns an adjusted base cast to i8*, since we do more address arithmetic on 2145a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner// it. 2146651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesllvm::Value *MicrosoftCXXABI::AdjustVirtualBase( 2147651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CodeGenFunction &CGF, const Expr *E, const CXXRecordDecl *RD, 2148651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *Base, llvm::Value *VBTableOffset, llvm::Value *VBPtrOffset) { 2149a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner CGBuilderTy &Builder = CGF.Builder; 2150a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner Base = Builder.CreateBitCast(Base, CGM.Int8PtrTy); 21516bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::BasicBlock *OriginalBB = nullptr; 21526bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::BasicBlock *SkipAdjustBB = nullptr; 21536bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::BasicBlock *VBaseAdjustBB = nullptr; 2154a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 2155a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // In the unspecified inheritance model, there might not be a vbtable at all, 2156a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // in which case we need to skip the virtual base lookup. If there is a 2157a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // vbtable, the first entry is a no-op entry that gives back the original 2158a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // base, so look for a virtual base adjustment offset of zero. 2159a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (VBPtrOffset) { 2160a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner OriginalBB = Builder.GetInsertBlock(); 2161a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner VBaseAdjustBB = CGF.createBasicBlock("memptr.vadjust"); 2162a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner SkipAdjustBB = CGF.createBasicBlock("memptr.skip_vadjust"); 2163a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *IsVirtual = 2164b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner Builder.CreateICmpNE(VBTableOffset, getZeroInt(), 2165a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner "memptr.is_vbase"); 2166a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner Builder.CreateCondBr(IsVirtual, VBaseAdjustBB, SkipAdjustBB); 2167a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner CGF.EmitBlock(VBaseAdjustBB); 2168a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner } 2169a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 2170a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // If we weren't given a dynamic vbptr offset, RD should be complete and we'll 2171a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // know the vbptr offset. 2172a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (!VBPtrOffset) { 2173b0f533e716ae5a21ca5682ea235a68082fd5ed28Reid Kleckner CharUnits offs = CharUnits::Zero(); 2174651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (!RD->hasDefinition()) { 2175651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines DiagnosticsEngine &Diags = CGF.CGM.getDiags(); 2176651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines unsigned DiagID = Diags.getCustomDiagID( 2177651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines DiagnosticsEngine::Error, 2178651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines "member pointer representation requires a " 2179651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines "complete class type for %0 to perform this expression"); 2180651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Diags.Report(E->getExprLoc(), DiagID) << RD << E->getSourceRange(); 2181651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } else if (RD->getNumVBases()) 2182651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines offs = getContext().getASTRecordLayout(RD).getVBPtrOffset(); 2183a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner VBPtrOffset = llvm::ConstantInt::get(CGM.IntTy, offs.getQuantity()); 2184a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner } 21856bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *VBPtr = nullptr; 2186a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *VBaseOffs = 21870e4f5598fedc333a05c0611fe3ad46266f5e1b5fTimur Iskhodzhanov GetVBaseOffsetFromVBPtr(CGF, Base, VBPtrOffset, VBTableOffset, &VBPtr); 2188a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *AdjustedBase = Builder.CreateInBoundsGEP(VBPtr, VBaseOffs); 2189a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 2190a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // Merge control flow with the case where we didn't have to adjust. 2191a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (VBaseAdjustBB) { 2192a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner Builder.CreateBr(SkipAdjustBB); 2193a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner CGF.EmitBlock(SkipAdjustBB); 2194a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::PHINode *Phi = Builder.CreatePHI(CGM.Int8PtrTy, 2, "memptr.base"); 2195a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner Phi->addIncoming(Base, OriginalBB); 2196a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner Phi->addIncoming(AdjustedBase, VBaseAdjustBB); 2197a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return Phi; 2198a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner } 2199a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return AdjustedBase; 2200a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner} 2201a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 2202651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesllvm::Value *MicrosoftCXXABI::EmitMemberDataPointerAddress( 2203651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CodeGenFunction &CGF, const Expr *E, llvm::Value *Base, llvm::Value *MemPtr, 2204651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const MemberPointerType *MPT) { 2205a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner assert(MPT->isMemberDataPointer()); 2206a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner unsigned AS = Base->getType()->getPointerAddressSpace(); 2207a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner llvm::Type *PType = 2208a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner CGF.ConvertTypeForMem(MPT->getPointeeType())->getPointerTo(AS); 2209a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner CGBuilderTy &Builder = CGF.Builder; 2210651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl(); 2211651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MSInheritanceAttr::Spelling Inheritance = RD->getMSInheritanceModel(); 2212a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 2213a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // Extract the fields we need, regardless of model. We'll apply them if we 2214a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // have them. 2215a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *FieldOffset = MemPtr; 22166bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *VirtualBaseAdjustmentOffset = nullptr; 22176bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *VBPtrOffset = nullptr; 2218a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (MemPtr->getType()->isStructTy()) { 2219a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // We need to extract values. 2220a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner unsigned I = 0; 2221a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner FieldOffset = Builder.CreateExtractValue(MemPtr, I++); 2222651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBPtrOffsetField(Inheritance)) 2223a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner VBPtrOffset = Builder.CreateExtractValue(MemPtr, I++); 2224651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBTableOffsetField(Inheritance)) 2225a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner VirtualBaseAdjustmentOffset = Builder.CreateExtractValue(MemPtr, I++); 2226a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner } 2227a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 2228a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (VirtualBaseAdjustmentOffset) { 2229651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Base = AdjustVirtualBase(CGF, E, RD, Base, VirtualBaseAdjustmentOffset, 2230a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner VBPtrOffset); 2231a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner } 2232651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 2233651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Cast to char*. 2234651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Base = Builder.CreateBitCast(Base, Builder.getInt8Ty()->getPointerTo(AS)); 2235651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 2236651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Apply the offset, which we assume is non-null. 2237a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *Addr = 2238a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner Builder.CreateInBoundsGEP(Base, FieldOffset, "memptr.offset"); 2239a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 2240a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner // Cast the address to the appropriate pointer type, adopting the address 2241a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner // space of the base pointer. 2242a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner return Builder.CreateBitCast(Addr, PType); 2243a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner} 2244a8a0f769ff4113a7f98c232fb0fc773a65371559Reid Kleckner 2245651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesstatic MSInheritanceAttr::Spelling 2246f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid KlecknergetInheritanceFromMemptr(const MemberPointerType *MPT) { 2247651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return MPT->getMostRecentCXXRecordDecl()->getMSInheritanceModel(); 2248f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner} 2249f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2250f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Klecknerllvm::Value * 2251f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid KlecknerMicrosoftCXXABI::EmitMemberPointerConversion(CodeGenFunction &CGF, 2252f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner const CastExpr *E, 2253f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Value *Src) { 2254f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner assert(E->getCastKind() == CK_DerivedToBaseMemberPointer || 2255f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner E->getCastKind() == CK_BaseToDerivedMemberPointer || 2256f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner E->getCastKind() == CK_ReinterpretMemberPointer); 2257f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2258f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // Use constant emission if we can. 2259f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (isa<llvm::Constant>(Src)) 2260f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return EmitMemberPointerConversion(E, cast<llvm::Constant>(Src)); 2261f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2262f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // We may be adding or dropping fields from the member pointer, so we need 2263f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // both types and the inheritance models of both records. 2264f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner const MemberPointerType *SrcTy = 2265f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner E->getSubExpr()->getType()->castAs<MemberPointerType>(); 2266f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner const MemberPointerType *DstTy = E->getType()->castAs<MemberPointerType>(); 2267f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner bool IsFunc = SrcTy->isMemberFunctionPointer(); 2268f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2269f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // If the classes use the same null representation, reinterpret_cast is a nop. 2270f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner bool IsReinterpret = E->getCastKind() == CK_ReinterpretMemberPointer; 2271651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (IsReinterpret && IsFunc) 2272651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return Src; 2273651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 2274651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CXXRecordDecl *SrcRD = SrcTy->getMostRecentCXXRecordDecl(); 2275651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CXXRecordDecl *DstRD = DstTy->getMostRecentCXXRecordDecl(); 2276651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (IsReinterpret && 2277651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines SrcRD->nullFieldOffsetIsZero() == DstRD->nullFieldOffsetIsZero()) 2278f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return Src; 2279f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2280f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner CGBuilderTy &Builder = CGF.Builder; 2281f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2282f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // Branch past the conversion if Src is null. 2283f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Value *IsNotNull = EmitMemberPointerIsNotNull(CGF, Src, SrcTy); 2284f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Constant *DstNull = EmitNullMemberPointer(DstTy); 2285f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2286f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // C++ 5.2.10p9: The null member pointer value is converted to the null member 2287f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // pointer value of the destination type. 2288f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (IsReinterpret) { 2289f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // For reinterpret casts, sema ensures that src and dst are both functions 2290f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // or data and have the same size, which means the LLVM types should match. 2291f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner assert(Src->getType() == DstNull->getType()); 2292f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return Builder.CreateSelect(IsNotNull, Src, DstNull); 2293f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner } 2294f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2295f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::BasicBlock *OriginalBB = Builder.GetInsertBlock(); 2296f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::BasicBlock *ConvertBB = CGF.createBasicBlock("memptr.convert"); 2297f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::BasicBlock *ContinueBB = CGF.createBasicBlock("memptr.converted"); 2298f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Builder.CreateCondBr(IsNotNull, ConvertBB, ContinueBB); 2299f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner CGF.EmitBlock(ConvertBB); 2300f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2301f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // Decompose src. 2302f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Value *FirstField = Src; 23036bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *NonVirtualBaseAdjustment = nullptr; 23046bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *VirtualBaseAdjustmentOffset = nullptr; 23056bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *VBPtrOffset = nullptr; 2306651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MSInheritanceAttr::Spelling SrcInheritance = SrcRD->getMSInheritanceModel(); 2307651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (!MSInheritanceAttr::hasOnlyOneField(IsFunc, SrcInheritance)) { 2308f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // We need to extract values. 2309f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner unsigned I = 0; 2310f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner FirstField = Builder.CreateExtractValue(Src, I++); 2311651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasNVOffsetField(IsFunc, SrcInheritance)) 2312f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner NonVirtualBaseAdjustment = Builder.CreateExtractValue(Src, I++); 2313651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBPtrOffsetField(SrcInheritance)) 2314f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner VBPtrOffset = Builder.CreateExtractValue(Src, I++); 2315651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBTableOffsetField(SrcInheritance)) 2316f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner VirtualBaseAdjustmentOffset = Builder.CreateExtractValue(Src, I++); 2317f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner } 2318f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2319f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // For data pointers, we adjust the field offset directly. For functions, we 2320f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // have a separate field. 2321f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Constant *Adj = getMemberPointerAdjustment(E); 2322f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (Adj) { 2323f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Adj = llvm::ConstantExpr::getTruncOrBitCast(Adj, CGM.IntTy); 2324f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Value *&NVAdjustField = IsFunc ? NonVirtualBaseAdjustment : FirstField; 2325f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner bool isDerivedToBase = (E->getCastKind() == CK_DerivedToBaseMemberPointer); 2326f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (!NVAdjustField) // If this field didn't exist in src, it's zero. 2327f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner NVAdjustField = getZeroInt(); 2328f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (isDerivedToBase) 2329f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner NVAdjustField = Builder.CreateNSWSub(NVAdjustField, Adj, "adj"); 2330f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner else 2331f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner NVAdjustField = Builder.CreateNSWAdd(NVAdjustField, Adj, "adj"); 2332f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner } 2333f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2334f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // FIXME PR15713: Support conversions through virtually derived classes. 2335f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2336f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // Recompose dst from the null struct and the adjusted fields from src. 2337651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MSInheritanceAttr::Spelling DstInheritance = DstRD->getMSInheritanceModel(); 2338f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Value *Dst; 2339651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasOnlyOneField(IsFunc, DstInheritance)) { 2340f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Dst = FirstField; 2341f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner } else { 2342f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Dst = llvm::UndefValue::get(DstNull->getType()); 2343f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner unsigned Idx = 0; 2344f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Dst = Builder.CreateInsertValue(Dst, FirstField, Idx++); 2345651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasNVOffsetField(IsFunc, DstInheritance)) 2346f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Dst = Builder.CreateInsertValue( 2347f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Dst, getValueOrZeroInt(NonVirtualBaseAdjustment), Idx++); 2348651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBPtrOffsetField(DstInheritance)) 2349f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Dst = Builder.CreateInsertValue( 2350f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Dst, getValueOrZeroInt(VBPtrOffset), Idx++); 2351651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBTableOffsetField(DstInheritance)) 2352f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Dst = Builder.CreateInsertValue( 2353f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Dst, getValueOrZeroInt(VirtualBaseAdjustmentOffset), Idx++); 2354f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner } 2355f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Builder.CreateBr(ContinueBB); 2356f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2357f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // In the continuation, choose between DstNull and Dst. 2358f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner CGF.EmitBlock(ContinueBB); 2359f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::PHINode *Phi = Builder.CreatePHI(DstNull->getType(), 2, "memptr.converted"); 2360f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Phi->addIncoming(DstNull, OriginalBB); 2361f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Phi->addIncoming(Dst, ConvertBB); 2362f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return Phi; 2363f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner} 2364f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2365f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Klecknerllvm::Constant * 2366f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid KlecknerMicrosoftCXXABI::EmitMemberPointerConversion(const CastExpr *E, 2367f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Constant *Src) { 2368f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner const MemberPointerType *SrcTy = 2369f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner E->getSubExpr()->getType()->castAs<MemberPointerType>(); 2370f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner const MemberPointerType *DstTy = E->getType()->castAs<MemberPointerType>(); 2371f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2372f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // If src is null, emit a new null for dst. We can't return src because dst 2373f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // might have a new representation. 2374f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (MemberPointerConstantIsNull(SrcTy, Src)) 2375f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return EmitNullMemberPointer(DstTy); 2376f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2377f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // We don't need to do anything for reinterpret_casts of non-null member 2378f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // pointers. We should only get here when the two type representations have 2379f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // the same size. 2380f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (E->getCastKind() == CK_ReinterpretMemberPointer) 2381f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return Src; 2382f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2383651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MSInheritanceAttr::Spelling SrcInheritance = getInheritanceFromMemptr(SrcTy); 2384651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MSInheritanceAttr::Spelling DstInheritance = getInheritanceFromMemptr(DstTy); 2385f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2386f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // Decompose src. 2387f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Constant *FirstField = Src; 23886bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Constant *NonVirtualBaseAdjustment = nullptr; 23896bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Constant *VirtualBaseAdjustmentOffset = nullptr; 23906bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Constant *VBPtrOffset = nullptr; 2391f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner bool IsFunc = SrcTy->isMemberFunctionPointer(); 2392651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (!MSInheritanceAttr::hasOnlyOneField(IsFunc, SrcInheritance)) { 2393f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // We need to extract values. 2394f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner unsigned I = 0; 2395f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner FirstField = Src->getAggregateElement(I++); 2396651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasNVOffsetField(IsFunc, SrcInheritance)) 2397f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner NonVirtualBaseAdjustment = Src->getAggregateElement(I++); 2398651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBPtrOffsetField(SrcInheritance)) 2399f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner VBPtrOffset = Src->getAggregateElement(I++); 2400651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBTableOffsetField(SrcInheritance)) 2401f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner VirtualBaseAdjustmentOffset = Src->getAggregateElement(I++); 2402f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner } 2403f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2404f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // For data pointers, we adjust the field offset directly. For functions, we 2405f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // have a separate field. 2406f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Constant *Adj = getMemberPointerAdjustment(E); 2407f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (Adj) { 2408f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Adj = llvm::ConstantExpr::getTruncOrBitCast(Adj, CGM.IntTy); 2409f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::Constant *&NVAdjustField = 2410f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner IsFunc ? NonVirtualBaseAdjustment : FirstField; 2411f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner bool IsDerivedToBase = (E->getCastKind() == CK_DerivedToBaseMemberPointer); 2412f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (!NVAdjustField) // If this field didn't exist in src, it's zero. 2413f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner NVAdjustField = getZeroInt(); 2414f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner if (IsDerivedToBase) 2415f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner NVAdjustField = llvm::ConstantExpr::getNSWSub(NVAdjustField, Adj); 2416f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner else 2417f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner NVAdjustField = llvm::ConstantExpr::getNSWAdd(NVAdjustField, Adj); 2418f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner } 2419f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2420f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // FIXME PR15713: Support conversions through virtually derived classes. 2421f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2422f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner // Recompose dst from the null struct and the adjusted fields from src. 2423651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasOnlyOneField(IsFunc, DstInheritance)) 2424f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return FirstField; 2425f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2426f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner llvm::SmallVector<llvm::Constant *, 4> Fields; 2427f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Fields.push_back(FirstField); 2428651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasNVOffsetField(IsFunc, DstInheritance)) 2429f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Fields.push_back(getConstantOrZeroInt(NonVirtualBaseAdjustment)); 2430651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBPtrOffsetField(DstInheritance)) 2431f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Fields.push_back(getConstantOrZeroInt(VBPtrOffset)); 2432651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBTableOffsetField(DstInheritance)) 2433f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner Fields.push_back(getConstantOrZeroInt(VirtualBaseAdjustmentOffset)); 2434f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner return llvm::ConstantStruct::getAnon(Fields); 2435f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner} 2436f632730ffb0b8ca531a35e737b29cc9f9774ca1dReid Kleckner 2437651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesllvm::Value *MicrosoftCXXABI::EmitLoadOfMemberFunctionPointer( 2438651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CodeGenFunction &CGF, const Expr *E, llvm::Value *&This, 2439651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines llvm::Value *MemPtr, const MemberPointerType *MPT) { 2440a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner assert(MPT->isMemberFunctionPointer()); 2441a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner const FunctionProtoType *FPT = 2442a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner MPT->getPointeeType()->castAs<FunctionProtoType>(); 2443651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl(); 2444a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::FunctionType *FTy = 2445a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner CGM.getTypes().GetFunctionType( 2446a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner CGM.getTypes().arrangeCXXMethodType(RD, FPT)); 2447a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner CGBuilderTy &Builder = CGF.Builder; 2448a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 2449651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines MSInheritanceAttr::Spelling Inheritance = RD->getMSInheritanceModel(); 2450a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 2451a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // Extract the fields we need, regardless of model. We'll apply them if we 2452a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // have them. 2453a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *FunctionPointer = MemPtr; 24546bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *NonVirtualBaseAdjustment = nullptr; 24556bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *VirtualBaseAdjustmentOffset = nullptr; 24566bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines llvm::Value *VBPtrOffset = nullptr; 2457a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (MemPtr->getType()->isStructTy()) { 2458a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // We need to extract values. 2459a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner unsigned I = 0; 2460a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner FunctionPointer = Builder.CreateExtractValue(MemPtr, I++); 2461651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasNVOffsetField(MPT, Inheritance)) 2462a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner NonVirtualBaseAdjustment = Builder.CreateExtractValue(MemPtr, I++); 2463651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBPtrOffsetField(Inheritance)) 246479e0291be71adb4c38431e27a683faa40bbedc61Reid Kleckner VBPtrOffset = Builder.CreateExtractValue(MemPtr, I++); 2465651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (MSInheritanceAttr::hasVBTableOffsetField(Inheritance)) 2466a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner VirtualBaseAdjustmentOffset = Builder.CreateExtractValue(MemPtr, I++); 2467a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner } 2468a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 2469a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (VirtualBaseAdjustmentOffset) { 2470651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines This = AdjustVirtualBase(CGF, E, RD, This, VirtualBaseAdjustmentOffset, 2471a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner VBPtrOffset); 2472a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner } 2473a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 2474a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner if (NonVirtualBaseAdjustment) { 2475a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner // Apply the adjustment and cast back to the original struct type. 2476a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner llvm::Value *Ptr = Builder.CreateBitCast(This, Builder.getInt8PtrTy()); 2477a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner Ptr = Builder.CreateInBoundsGEP(Ptr, NonVirtualBaseAdjustment); 2478a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner This = Builder.CreateBitCast(Ptr, This->getType(), "this.adjusted"); 2479a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner } 2480a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 2481a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner return Builder.CreateBitCast(FunctionPointer, FTy->getPointerTo()); 2482a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner} 2483a3609b0c7685346308ed2c8022f94949bbfe7cdfReid Kleckner 2484071cc7deffad608165b1ddd5263e8bf181861520Charles DavisCGCXXABI *clang::CodeGen::CreateMicrosoftCXXABI(CodeGenModule &CGM) { 2485c3926645d70842eae22641df1bf69da457a0ff11Charles Davis return new MicrosoftCXXABI(CGM); 2486c3926645d70842eae22641df1bf69da457a0ff11Charles Davis} 2487ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2488ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// MS RTTI Overview: 2489ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// The run time type information emitted by cl.exe contains 5 distinct types of 2490ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// structures. Many of them reference each other. 2491ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// 2492ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// TypeInfo: Static classes that are returned by typeid. 2493ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// 2494ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// CompleteObjectLocator: Referenced by vftables. They contain information 2495ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// required for dynamic casting, including OffsetFromTop. They also contain 2496ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// a reference to the TypeInfo for the type and a reference to the 2497ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// CompleteHierarchyDescriptor for the type. 2498ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// 2499ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// ClassHieararchyDescriptor: Contains information about a class hierarchy. 2500ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// Used during dynamic_cast to walk a class hierarchy. References a base 2501ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// class array and the size of said array. 2502ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// 2503ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// BaseClassArray: Contains a list of classes in a hierarchy. BaseClassArray is 2504ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// somewhat of a misnomer because the most derived class is also in the list 2505ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// as well as multiple copies of virtual bases (if they occur multiple times 2506ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// in the hiearchy.) The BaseClassArray contains one BaseClassDescriptor for 2507ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// every path in the hierarchy, in pre-order depth first order. Note, we do 2508ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// not declare a specific llvm type for BaseClassArray, it's merely an array 2509ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// of BaseClassDescriptor pointers. 2510ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// 2511ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// BaseClassDescriptor: Contains information about a class in a class hierarchy. 2512ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// BaseClassDescriptor is also somewhat of a misnomer for the same reason that 2513ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// BaseClassArray is. It contains information about a class within a 2514ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// hierarchy such as: is this base is ambiguous and what is its offset in the 2515ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// vbtable. The names of the BaseClassDescriptors have all of their fields 2516ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// mangled into them so they can be aggressively deduplicated by the linker. 2517ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2518ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesstatic llvm::GlobalVariable *getTypeInfoVTable(CodeGenModule &CGM) { 2519ef8225444452a1486bd721f3285301fe84643b00Stephen Hines StringRef MangledName("\01??_7type_info@@6B@"); 2520ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (auto VTable = CGM.getModule().getNamedGlobal(MangledName)) 2521ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return VTable; 2522ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return new llvm::GlobalVariable(CGM.getModule(), CGM.Int8PtrTy, 2523ef8225444452a1486bd721f3285301fe84643b00Stephen Hines /*Constant=*/true, 2524ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalVariable::ExternalLinkage, 2525ef8225444452a1486bd721f3285301fe84643b00Stephen Hines /*Initializer=*/nullptr, MangledName); 2526ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 2527ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2528ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesnamespace { 2529ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2530ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// \brief A Helper struct that stores information about a class in a class 2531ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// hierarchy. The information stored in these structs struct is used during 2532ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// the generation of ClassHierarchyDescriptors and BaseClassDescriptors. 2533ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// During RTTI creation, MSRTTIClasses are stored in a contiguous array with 2534ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// implicit depth first pre-order tree connectivity. getFirstChild and 2535ef8225444452a1486bd721f3285301fe84643b00Stephen Hines// getNextSibling allow us to walk the tree efficiently. 2536ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesstruct MSRTTIClass { 2537ef8225444452a1486bd721f3285301fe84643b00Stephen Hines enum { 2538ef8225444452a1486bd721f3285301fe84643b00Stephen Hines IsPrivateOnPath = 1 | 8, 2539ef8225444452a1486bd721f3285301fe84643b00Stephen Hines IsAmbiguous = 2, 2540ef8225444452a1486bd721f3285301fe84643b00Stephen Hines IsPrivate = 4, 2541ef8225444452a1486bd721f3285301fe84643b00Stephen Hines IsVirtual = 16, 2542ef8225444452a1486bd721f3285301fe84643b00Stephen Hines HasHierarchyDescriptor = 64 2543ef8225444452a1486bd721f3285301fe84643b00Stephen Hines }; 2544ef8225444452a1486bd721f3285301fe84643b00Stephen Hines MSRTTIClass(const CXXRecordDecl *RD) : RD(RD) {} 2545ef8225444452a1486bd721f3285301fe84643b00Stephen Hines uint32_t initialize(const MSRTTIClass *Parent, 2546ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const CXXBaseSpecifier *Specifier); 2547ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2548ef8225444452a1486bd721f3285301fe84643b00Stephen Hines MSRTTIClass *getFirstChild() { return this + 1; } 2549ef8225444452a1486bd721f3285301fe84643b00Stephen Hines static MSRTTIClass *getNextChild(MSRTTIClass *Child) { 2550ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return Child + 1 + Child->NumBases; 2551ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2552ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2553ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const CXXRecordDecl *RD, *VirtualRoot; 2554ef8225444452a1486bd721f3285301fe84643b00Stephen Hines uint32_t Flags, NumBases, OffsetInVBase; 2555ef8225444452a1486bd721f3285301fe84643b00Stephen Hines}; 2556ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2557ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// \brief Recursively initialize the base class array. 2558ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesuint32_t MSRTTIClass::initialize(const MSRTTIClass *Parent, 2559ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const CXXBaseSpecifier *Specifier) { 2560ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Flags = HasHierarchyDescriptor; 2561ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!Parent) { 2562ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VirtualRoot = nullptr; 2563ef8225444452a1486bd721f3285301fe84643b00Stephen Hines OffsetInVBase = 0; 2564ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } else { 2565ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (Specifier->getAccessSpecifier() != AS_public) 2566ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Flags |= IsPrivate | IsPrivateOnPath; 2567ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (Specifier->isVirtual()) { 2568ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Flags |= IsVirtual; 2569ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VirtualRoot = RD; 2570ef8225444452a1486bd721f3285301fe84643b00Stephen Hines OffsetInVBase = 0; 2571ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } else { 2572ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (Parent->Flags & IsPrivateOnPath) 2573ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Flags |= IsPrivateOnPath; 2574ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VirtualRoot = Parent->VirtualRoot; 2575ef8225444452a1486bd721f3285301fe84643b00Stephen Hines OffsetInVBase = Parent->OffsetInVBase + RD->getASTContext() 2576ef8225444452a1486bd721f3285301fe84643b00Stephen Hines .getASTRecordLayout(Parent->RD).getBaseClassOffset(RD).getQuantity(); 2577ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2578ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2579ef8225444452a1486bd721f3285301fe84643b00Stephen Hines NumBases = 0; 2580ef8225444452a1486bd721f3285301fe84643b00Stephen Hines MSRTTIClass *Child = getFirstChild(); 2581ef8225444452a1486bd721f3285301fe84643b00Stephen Hines for (const CXXBaseSpecifier &Base : RD->bases()) { 2582ef8225444452a1486bd721f3285301fe84643b00Stephen Hines NumBases += Child->initialize(this, &Base) + 1; 2583ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Child = getNextChild(Child); 2584ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2585ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return NumBases; 2586ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 2587ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2588ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesstatic llvm::GlobalValue::LinkageTypes getLinkageForRTTI(QualType Ty) { 2589ef8225444452a1486bd721f3285301fe84643b00Stephen Hines switch (Ty->getLinkage()) { 2590ef8225444452a1486bd721f3285301fe84643b00Stephen Hines case NoLinkage: 2591ef8225444452a1486bd721f3285301fe84643b00Stephen Hines case InternalLinkage: 2592ef8225444452a1486bd721f3285301fe84643b00Stephen Hines case UniqueExternalLinkage: 2593ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return llvm::GlobalValue::InternalLinkage; 2594ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2595ef8225444452a1486bd721f3285301fe84643b00Stephen Hines case VisibleNoLinkage: 2596ef8225444452a1486bd721f3285301fe84643b00Stephen Hines case ExternalLinkage: 2597ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return llvm::GlobalValue::LinkOnceODRLinkage; 2598ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2599ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm_unreachable("Invalid linkage!"); 2600ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 2601ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2602ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// \brief An ephemeral helper class for building MS RTTI types. It caches some 2603ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// calls to the module and information about the most derived class in a 2604ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// hierarchy. 2605ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesstruct MSRTTIBuilder { 2606ef8225444452a1486bd721f3285301fe84643b00Stephen Hines enum { 2607ef8225444452a1486bd721f3285301fe84643b00Stephen Hines HasBranchingHierarchy = 1, 2608ef8225444452a1486bd721f3285301fe84643b00Stephen Hines HasVirtualBranchingHierarchy = 2, 2609ef8225444452a1486bd721f3285301fe84643b00Stephen Hines HasAmbiguousBases = 4 2610ef8225444452a1486bd721f3285301fe84643b00Stephen Hines }; 2611ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2612ef8225444452a1486bd721f3285301fe84643b00Stephen Hines MSRTTIBuilder(MicrosoftCXXABI &ABI, const CXXRecordDecl *RD) 2613ef8225444452a1486bd721f3285301fe84643b00Stephen Hines : CGM(ABI.CGM), Context(CGM.getContext()), 2614ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VMContext(CGM.getLLVMContext()), Module(CGM.getModule()), RD(RD), 2615ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Linkage(getLinkageForRTTI(CGM.getContext().getTagDeclType(RD))), 2616ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI(ABI) {} 2617ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2618ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalVariable *getBaseClassDescriptor(const MSRTTIClass &Classes); 2619ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalVariable * 2620ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getBaseClassArray(SmallVectorImpl<MSRTTIClass> &Classes); 2621ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalVariable *getClassHierarchyDescriptor(); 2622ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalVariable *getCompleteObjectLocator(const VPtrInfo *Info); 2623ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2624ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CodeGenModule &CGM; 2625ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ASTContext &Context; 2626ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::LLVMContext &VMContext; 2627ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Module &Module; 2628ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const CXXRecordDecl *RD; 2629ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::GlobalVariable::LinkageTypes Linkage; 2630ef8225444452a1486bd721f3285301fe84643b00Stephen Hines MicrosoftCXXABI &ABI; 2631ef8225444452a1486bd721f3285301fe84643b00Stephen Hines}; 2632ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2633ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} // namespace 2634ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2635ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// \brief Recursively serializes a class hierarchy in pre-order depth first 2636ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// order. 2637ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesstatic void serializeClassHierarchy(SmallVectorImpl<MSRTTIClass> &Classes, 2638ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const CXXRecordDecl *RD) { 2639ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Classes.push_back(MSRTTIClass(RD)); 2640ef8225444452a1486bd721f3285301fe84643b00Stephen Hines for (const CXXBaseSpecifier &Base : RD->bases()) 2641ef8225444452a1486bd721f3285301fe84643b00Stephen Hines serializeClassHierarchy(Classes, Base.getType()->getAsCXXRecordDecl()); 2642ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 2643ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2644ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// \brief Find ambiguity among base classes. 2645ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesstatic void 2646ef8225444452a1486bd721f3285301fe84643b00Stephen HinesdetectAmbiguousBases(SmallVectorImpl<MSRTTIClass> &Classes) { 2647ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::SmallPtrSet<const CXXRecordDecl *, 8> VirtualBases; 2648ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::SmallPtrSet<const CXXRecordDecl *, 8> UniqueBases; 2649ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::SmallPtrSet<const CXXRecordDecl *, 8> AmbiguousBases; 2650ef8225444452a1486bd721f3285301fe84643b00Stephen Hines for (MSRTTIClass *Class = &Classes.front(); Class <= &Classes.back();) { 2651ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if ((Class->Flags & MSRTTIClass::IsVirtual) && 2652ef8225444452a1486bd721f3285301fe84643b00Stephen Hines !VirtualBases.insert(Class->RD)) { 2653ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Class = MSRTTIClass::getNextChild(Class); 2654ef8225444452a1486bd721f3285301fe84643b00Stephen Hines continue; 2655ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2656ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!UniqueBases.insert(Class->RD)) 2657ef8225444452a1486bd721f3285301fe84643b00Stephen Hines AmbiguousBases.insert(Class->RD); 2658ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Class++; 2659ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2660ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (AmbiguousBases.empty()) 2661ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return; 2662ef8225444452a1486bd721f3285301fe84643b00Stephen Hines for (MSRTTIClass &Class : Classes) 2663ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (AmbiguousBases.count(Class.RD)) 2664ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Class.Flags |= MSRTTIClass::IsAmbiguous; 2665ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 2666ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2667ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesllvm::GlobalVariable *MSRTTIBuilder::getClassHierarchyDescriptor() { 2668ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SmallString<256> MangledName; 2669ef8225444452a1486bd721f3285301fe84643b00Stephen Hines { 2670ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::raw_svector_ostream Out(MangledName); 2671ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getMangleContext().mangleCXXRTTIClassHierarchyDescriptor(RD, Out); 2672ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2673ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2674ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Check to see if we've already declared this ClassHierarchyDescriptor. 2675ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (auto CHD = Module.getNamedGlobal(MangledName)) 2676ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return CHD; 2677ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2678ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Serialize the class hierarchy and initialize the CHD Fields. 2679ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SmallVector<MSRTTIClass, 8> Classes; 2680ef8225444452a1486bd721f3285301fe84643b00Stephen Hines serializeClassHierarchy(Classes, RD); 2681ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Classes.front().initialize(/*Parent=*/nullptr, /*Specifier=*/nullptr); 2682ef8225444452a1486bd721f3285301fe84643b00Stephen Hines detectAmbiguousBases(Classes); 2683ef8225444452a1486bd721f3285301fe84643b00Stephen Hines int Flags = 0; 2684ef8225444452a1486bd721f3285301fe84643b00Stephen Hines for (auto Class : Classes) { 2685ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (Class.RD->getNumBases() > 1) 2686ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Flags |= HasBranchingHierarchy; 2687ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Note: cl.exe does not calculate "HasAmbiguousBases" correctly. We 2688ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // believe the field isn't actually used. 2689ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (Class.Flags & MSRTTIClass::IsAmbiguous) 2690ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Flags |= HasAmbiguousBases; 2691ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2692ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if ((Flags & HasBranchingHierarchy) && RD->getNumVBases() != 0) 2693ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Flags |= HasVirtualBranchingHierarchy; 2694ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // These gep indices are used to get the address of the first element of the 2695ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // base class array. 2696ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Value *GEPIndices[] = {llvm::ConstantInt::get(CGM.IntTy, 0), 2697ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, 0)}; 2698ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2699ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Forward-declare the class hierarchy descriptor 2700ef8225444452a1486bd721f3285301fe84643b00Stephen Hines auto Type = ABI.getClassHierarchyDescriptorType(); 2701ef8225444452a1486bd721f3285301fe84643b00Stephen Hines auto CHD = new llvm::GlobalVariable(Module, Type, /*Constant=*/true, Linkage, 2702ef8225444452a1486bd721f3285301fe84643b00Stephen Hines /*Initializer=*/nullptr, 2703ef8225444452a1486bd721f3285301fe84643b00Stephen Hines MangledName.c_str()); 2704ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2705ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Initialize the base class ClassHierarchyDescriptor. 2706ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *Fields[] = { 2707ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, 0), // Unknown 2708ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, Flags), 2709ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, Classes.size()), 2710ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getImageRelativeConstant(llvm::ConstantExpr::getInBoundsGetElementPtr( 2711ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getBaseClassArray(Classes), 2712ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ArrayRef<llvm::Value *>(GEPIndices))), 2713ef8225444452a1486bd721f3285301fe84643b00Stephen Hines }; 2714ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CHD->setInitializer(llvm::ConstantStruct::get(Type, Fields)); 2715ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return CHD; 2716ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 2717ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2718ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesllvm::GlobalVariable * 2719ef8225444452a1486bd721f3285301fe84643b00Stephen HinesMSRTTIBuilder::getBaseClassArray(SmallVectorImpl<MSRTTIClass> &Classes) { 2720ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SmallString<256> MangledName; 2721ef8225444452a1486bd721f3285301fe84643b00Stephen Hines { 2722ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::raw_svector_ostream Out(MangledName); 2723ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getMangleContext().mangleCXXRTTIBaseClassArray(RD, Out); 2724ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2725ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2726ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Forward-declare the base class array. 2727ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // cl.exe pads the base class array with 1 (in 32 bit mode) or 4 (in 64 bit 2728ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // mode) bytes of padding. We provide a pointer sized amount of padding by 2729ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // adding +1 to Classes.size(). The sections have pointer alignment and are 2730ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // marked pick-any so it shouldn't matter. 2731ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Type *PtrType = ABI.getImageRelativeType( 2732ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getBaseClassDescriptorType()->getPointerTo()); 2733ef8225444452a1486bd721f3285301fe84643b00Stephen Hines auto *ArrType = llvm::ArrayType::get(PtrType, Classes.size() + 1); 2734ef8225444452a1486bd721f3285301fe84643b00Stephen Hines auto *BCA = new llvm::GlobalVariable( 2735ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Module, ArrType, 2736ef8225444452a1486bd721f3285301fe84643b00Stephen Hines /*Constant=*/true, Linkage, /*Initializer=*/nullptr, MangledName.c_str()); 2737ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2738ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Initialize the BaseClassArray. 2739ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SmallVector<llvm::Constant *, 8> BaseClassArrayData; 2740ef8225444452a1486bd721f3285301fe84643b00Stephen Hines for (MSRTTIClass &Class : Classes) 2741ef8225444452a1486bd721f3285301fe84643b00Stephen Hines BaseClassArrayData.push_back( 2742ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getImageRelativeConstant(getBaseClassDescriptor(Class))); 2743ef8225444452a1486bd721f3285301fe84643b00Stephen Hines BaseClassArrayData.push_back(llvm::Constant::getNullValue(PtrType)); 2744ef8225444452a1486bd721f3285301fe84643b00Stephen Hines BCA->setInitializer(llvm::ConstantArray::get(ArrType, BaseClassArrayData)); 2745ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return BCA; 2746ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 2747ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2748ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesllvm::GlobalVariable * 2749ef8225444452a1486bd721f3285301fe84643b00Stephen HinesMSRTTIBuilder::getBaseClassDescriptor(const MSRTTIClass &Class) { 2750ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Compute the fields for the BaseClassDescriptor. They are computed up front 2751ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // because they are mangled into the name of the object. 2752ef8225444452a1486bd721f3285301fe84643b00Stephen Hines uint32_t OffsetInVBTable = 0; 2753ef8225444452a1486bd721f3285301fe84643b00Stephen Hines int32_t VBPtrOffset = -1; 2754ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (Class.VirtualRoot) { 2755ef8225444452a1486bd721f3285301fe84643b00Stephen Hines auto &VTableContext = CGM.getMicrosoftVTableContext(); 2756ef8225444452a1486bd721f3285301fe84643b00Stephen Hines OffsetInVBTable = VTableContext.getVBTableIndex(RD, Class.VirtualRoot) * 4; 2757ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VBPtrOffset = Context.getASTRecordLayout(RD).getVBPtrOffset().getQuantity(); 2758ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2759ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2760ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SmallString<256> MangledName; 2761ef8225444452a1486bd721f3285301fe84643b00Stephen Hines { 2762ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::raw_svector_ostream Out(MangledName); 2763ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getMangleContext().mangleCXXRTTIBaseClassDescriptor( 2764ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Class.RD, Class.OffsetInVBase, VBPtrOffset, OffsetInVBTable, 2765ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Class.Flags, Out); 2766ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2767ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2768ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Check to see if we've already declared this object. 2769ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (auto BCD = Module.getNamedGlobal(MangledName)) 2770ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return BCD; 2771ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2772ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Forward-declare the base class descriptor. 2773ef8225444452a1486bd721f3285301fe84643b00Stephen Hines auto Type = ABI.getBaseClassDescriptorType(); 2774ef8225444452a1486bd721f3285301fe84643b00Stephen Hines auto BCD = new llvm::GlobalVariable(Module, Type, /*Constant=*/true, Linkage, 2775ef8225444452a1486bd721f3285301fe84643b00Stephen Hines /*Initializer=*/nullptr, 2776ef8225444452a1486bd721f3285301fe84643b00Stephen Hines MangledName.c_str()); 2777ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2778ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Initialize the BaseClassDescriptor. 2779ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *Fields[] = { 2780ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getImageRelativeConstant( 2781ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getAddrOfRTTIDescriptor(Context.getTypeDeclType(Class.RD))), 2782ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, Class.NumBases), 2783ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, Class.OffsetInVBase), 2784ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, VBPtrOffset), 2785ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, OffsetInVBTable), 2786ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, Class.Flags), 2787ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getImageRelativeConstant( 2788ef8225444452a1486bd721f3285301fe84643b00Stephen Hines MSRTTIBuilder(ABI, Class.RD).getClassHierarchyDescriptor()), 2789ef8225444452a1486bd721f3285301fe84643b00Stephen Hines }; 2790ef8225444452a1486bd721f3285301fe84643b00Stephen Hines BCD->setInitializer(llvm::ConstantStruct::get(Type, Fields)); 2791ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return BCD; 2792ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 2793ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2794ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesllvm::GlobalVariable * 2795ef8225444452a1486bd721f3285301fe84643b00Stephen HinesMSRTTIBuilder::getCompleteObjectLocator(const VPtrInfo *Info) { 2796ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SmallString<256> MangledName; 2797ef8225444452a1486bd721f3285301fe84643b00Stephen Hines { 2798ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::raw_svector_ostream Out(MangledName); 2799ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getMangleContext().mangleCXXRTTICompleteObjectLocator(RD, Info->MangledPath, Out); 2800ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2801ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2802ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Check to see if we've already computed this complete object locator. 2803ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (auto COL = Module.getNamedGlobal(MangledName)) 2804ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return COL; 2805ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2806ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Compute the fields of the complete object locator. 2807ef8225444452a1486bd721f3285301fe84643b00Stephen Hines int OffsetToTop = Info->FullOffsetInMDC.getQuantity(); 2808ef8225444452a1486bd721f3285301fe84643b00Stephen Hines int VFPtrOffset = 0; 2809ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // The offset includes the vtordisp if one exists. 2810ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (const CXXRecordDecl *VBase = Info->getVBaseWithVPtr()) 2811ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (Context.getASTRecordLayout(RD) 2812ef8225444452a1486bd721f3285301fe84643b00Stephen Hines .getVBaseOffsetsMap() 2813ef8225444452a1486bd721f3285301fe84643b00Stephen Hines .find(VBase) 2814ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ->second.hasVtorDisp()) 2815ef8225444452a1486bd721f3285301fe84643b00Stephen Hines VFPtrOffset = Info->NonVirtualOffset.getQuantity() + 4; 2816ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2817ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Forward-declare the complete object locator. 2818ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::StructType *Type = ABI.getCompleteObjectLocatorType(); 2819ef8225444452a1486bd721f3285301fe84643b00Stephen Hines auto COL = new llvm::GlobalVariable(Module, Type, /*Constant=*/true, Linkage, 2820ef8225444452a1486bd721f3285301fe84643b00Stephen Hines /*Initializer=*/nullptr, MangledName.c_str()); 2821ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2822ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Initialize the CompleteObjectLocator. 2823ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *Fields[] = { 2824ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, ABI.isImageRelative()), 2825ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, OffsetToTop), 2826ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantInt::get(CGM.IntTy, VFPtrOffset), 2827ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getImageRelativeConstant( 2828ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.GetAddrOfRTTIDescriptor(Context.getTypeDeclType(RD))), 2829ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getImageRelativeConstant(getClassHierarchyDescriptor()), 2830ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ABI.getImageRelativeConstant(COL), 2831ef8225444452a1486bd721f3285301fe84643b00Stephen Hines }; 2832ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ArrayRef<llvm::Constant *> FieldsRef(Fields); 2833ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!ABI.isImageRelative()) 2834ef8225444452a1486bd721f3285301fe84643b00Stephen Hines FieldsRef = FieldsRef.drop_back(); 2835ef8225444452a1486bd721f3285301fe84643b00Stephen Hines COL->setInitializer(llvm::ConstantStruct::get(Type, FieldsRef)); 2836ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return COL; 2837ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 2838ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2839ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// \brief Gets a TypeDescriptor. Returns a llvm::Constant * rather than a 2840ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// llvm::GlobalVariable * because different type descriptors have different 2841ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// types, and need to be abstracted. They are abstracting by casting the 2842ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// address to an Int8PtrTy. 2843ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesllvm::Constant *MicrosoftCXXABI::getAddrOfRTTIDescriptor(QualType Type) { 2844ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SmallString<256> MangledName, TypeInfoString; 2845ef8225444452a1486bd721f3285301fe84643b00Stephen Hines { 2846ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::raw_svector_ostream Out(MangledName); 2847ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getMangleContext().mangleCXXRTTI(Type, Out); 2848ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2849ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2850ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Check to see if we've already declared this TypeDescriptor. 2851ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (llvm::GlobalVariable *GV = CGM.getModule().getNamedGlobal(MangledName)) 2852ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return llvm::ConstantExpr::getBitCast(GV, CGM.Int8PtrTy); 2853ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2854ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Compute the fields for the TypeDescriptor. 2855ef8225444452a1486bd721f3285301fe84643b00Stephen Hines { 2856ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::raw_svector_ostream Out(TypeInfoString); 2857ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getMangleContext().mangleCXXRTTIName(Type, Out); 2858ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } 2859ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2860ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Declare and initialize the TypeDescriptor. 2861ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::Constant *Fields[] = { 2862ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getTypeInfoVTable(CGM), // VFPtr 2863ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantPointerNull::get(CGM.Int8PtrTy), // Runtime data 2864ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantDataArray::getString(CGM.getLLVMContext(), TypeInfoString)}; 2865ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::StructType *TypeDescriptorType = 2866ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getTypeDescriptorType(TypeInfoString); 2867ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return llvm::ConstantExpr::getBitCast( 2868ef8225444452a1486bd721f3285301fe84643b00Stephen Hines new llvm::GlobalVariable( 2869ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.getModule(), TypeDescriptorType, /*Constant=*/false, 2870ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getLinkageForRTTI(Type), 2871ef8225444452a1486bd721f3285301fe84643b00Stephen Hines llvm::ConstantStruct::get(TypeDescriptorType, Fields), 2872ef8225444452a1486bd721f3285301fe84643b00Stephen Hines MangledName.c_str()), 2873ef8225444452a1486bd721f3285301fe84643b00Stephen Hines CGM.Int8PtrTy); 2874ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 2875ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 2876ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// \brief Gets or a creates a Microsoft CompleteObjectLocator. 2877ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesllvm::GlobalVariable * 2878ef8225444452a1486bd721f3285301fe84643b00Stephen HinesMicrosoftCXXABI::getMSCompleteObjectLocator(const CXXRecordDecl *RD, 2879ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const VPtrInfo *Info) { 2880ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return MSRTTIBuilder(*this, RD).getCompleteObjectLocator(Info); 2881ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 2882