Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 1 | //===--- CGVtable.cpp - Emit LLVM Code for C++ vtables --------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This contains code dealing with C++ code generation of virtual tables. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "CodeGenModule.h" |
| 15 | #include "CodeGenFunction.h" |
| 16 | |
| 17 | #include "clang/AST/RecordLayout.h" |
Zhongxing Xu | 7fe26ac | 2009-11-13 05:46:16 +0000 | [diff] [blame] | 18 | #include <cstdio> |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 19 | |
| 20 | using namespace clang; |
| 21 | using namespace CodeGen; |
| 22 | |
| 23 | class VtableBuilder { |
| 24 | public: |
| 25 | /// Index_t - Vtable index type. |
| 26 | typedef uint64_t Index_t; |
| 27 | private: |
| 28 | std::vector<llvm::Constant *> &methods; |
| 29 | std::vector<llvm::Constant *> submethods; |
| 30 | llvm::Type *Ptr8Ty; |
| 31 | /// Class - The most derived class that this vtable is being built for. |
| 32 | const CXXRecordDecl *Class; |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 33 | /// LayoutClass - The most derived class used for virtual base layout |
| 34 | /// information. |
| 35 | const CXXRecordDecl *LayoutClass; |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 36 | /// LayoutOffset - The offset for Class in LayoutClass. |
| 37 | uint64_t LayoutOffset; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 38 | /// BLayout - Layout for the most derived class that this vtable is being |
| 39 | /// built for. |
| 40 | const ASTRecordLayout &BLayout; |
| 41 | llvm::SmallSet<const CXXRecordDecl *, 32> IndirectPrimary; |
| 42 | llvm::SmallSet<const CXXRecordDecl *, 32> SeenVBase; |
| 43 | llvm::Constant *rtti; |
| 44 | llvm::LLVMContext &VMContext; |
| 45 | CodeGenModule &CGM; // Per-module state. |
| 46 | /// Index - Maps a method decl into a vtable index. Useful for virtual |
| 47 | /// dispatch codegen. |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 48 | llvm::DenseMap<GlobalDecl, Index_t> Index; |
| 49 | llvm::DenseMap<GlobalDecl, Index_t> VCall; |
| 50 | llvm::DenseMap<GlobalDecl, Index_t> VCallOffset; |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 51 | // This is the offset to the nearest virtual base |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 52 | llvm::DenseMap<GlobalDecl, Index_t> NonVirtualOffset; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 53 | llvm::DenseMap<const CXXRecordDecl *, Index_t> VBIndex; |
Mike Stump | 94aff93 | 2009-10-27 23:46:47 +0000 | [diff] [blame] | 54 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 55 | typedef llvm::DenseMap<GlobalDecl, int> Pures_t; |
Mike Stump | 94aff93 | 2009-10-27 23:46:47 +0000 | [diff] [blame] | 56 | Pures_t Pures; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 57 | typedef std::pair<Index_t, Index_t> CallOffset; |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 58 | typedef llvm::DenseMap<GlobalDecl, CallOffset> Thunks_t; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 59 | Thunks_t Thunks; |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 60 | typedef llvm::DenseMap<GlobalDecl, |
Mike Stump | d9878a1 | 2009-10-13 10:55:21 +0000 | [diff] [blame] | 61 | std::pair<std::pair<CallOffset, CallOffset>, |
| 62 | CanQualType> > CovariantThunks_t; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 63 | CovariantThunks_t CovariantThunks; |
| 64 | std::vector<Index_t> VCalls; |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 65 | |
| 66 | typedef std::pair<const CXXRecordDecl *, uint64_t> CtorVtable_t; |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 67 | // subAddressPoints - Used to hold the AddressPoints (offsets) into the built |
| 68 | // vtable for use in computing the initializers for the VTT. |
| 69 | llvm::DenseMap<CtorVtable_t, int64_t> &subAddressPoints; |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 70 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 71 | typedef CXXRecordDecl::method_iterator method_iter; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 72 | const bool Extern; |
| 73 | const uint32_t LLVMPointerWidth; |
| 74 | Index_t extra; |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 75 | typedef std::vector<std::pair<const CXXRecordDecl *, int64_t> > Path_t; |
Mike Stump | 94aff93 | 2009-10-27 23:46:47 +0000 | [diff] [blame] | 76 | llvm::Constant *cxa_pure; |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 77 | static llvm::DenseMap<CtorVtable_t, int64_t>& |
| 78 | AllocAddressPoint(CodeGenModule &cgm, const CXXRecordDecl *l, |
| 79 | const CXXRecordDecl *c) { |
| 80 | CodeGenModule::AddrMap_t *&oref = cgm.AddressPoints[l]; |
| 81 | if (oref == 0) |
| 82 | oref = new CodeGenModule::AddrMap_t; |
| 83 | |
| 84 | llvm::DenseMap<CtorVtable_t, int64_t> *&ref = (*oref)[c]; |
| 85 | if (ref == 0) |
| 86 | ref = new llvm::DenseMap<CtorVtable_t, int64_t>; |
| 87 | return *ref; |
| 88 | } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 89 | public: |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 90 | VtableBuilder(std::vector<llvm::Constant *> &meth, const CXXRecordDecl *c, |
| 91 | const CXXRecordDecl *l, uint64_t lo, CodeGenModule &cgm) |
| 92 | : methods(meth), Class(c), LayoutClass(l), LayoutOffset(lo), |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 93 | BLayout(cgm.getContext().getASTRecordLayout(l)), |
Mike Stump | cbcd4e5 | 2009-11-14 23:32:21 +0000 | [diff] [blame] | 94 | rtti(cgm.GenerateRttiRef(c)), VMContext(cgm.getModule().getContext()), |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 95 | CGM(cgm), subAddressPoints(AllocAddressPoint(cgm, l, c)), |
Mike Stump | 6be2b17 | 2009-11-19 00:49:05 +0000 | [diff] [blame] | 96 | Extern(!l->isInAnonymousNamespace()), |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 97 | LLVMPointerWidth(cgm.getContext().Target.getPointerWidth(0)) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 98 | Ptr8Ty = llvm::PointerType::get(llvm::Type::getInt8Ty(VMContext), 0); |
Mike Stump | 7809e0d | 2009-10-28 00:35:46 +0000 | [diff] [blame] | 99 | |
| 100 | // Calculate pointer for ___cxa_pure_virtual. |
| 101 | const llvm::FunctionType *FTy; |
| 102 | std::vector<const llvm::Type*> ArgTys; |
| 103 | const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); |
| 104 | FTy = llvm::FunctionType::get(ResultType, ArgTys, false); |
| 105 | cxa_pure = wrap(CGM.CreateRuntimeFunction(FTy, "__cxa_pure_virtual")); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 106 | } |
| 107 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 108 | llvm::DenseMap<GlobalDecl, Index_t> &getIndex() { return Index; } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 109 | llvm::DenseMap<const CXXRecordDecl *, Index_t> &getVBIndex() |
| 110 | { return VBIndex; } |
| 111 | |
| 112 | llvm::Constant *wrap(Index_t i) { |
| 113 | llvm::Constant *m; |
| 114 | m = llvm::ConstantInt::get(llvm::Type::getInt64Ty(VMContext), i); |
| 115 | return llvm::ConstantExpr::getIntToPtr(m, Ptr8Ty); |
| 116 | } |
| 117 | |
| 118 | llvm::Constant *wrap(llvm::Constant *m) { |
| 119 | return llvm::ConstantExpr::getBitCast(m, Ptr8Ty); |
| 120 | } |
| 121 | |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 122 | //#define D1(x) |
| 123 | #define D1(X) do { if (getenv("DEBUG")) { X; } } while (0) |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 124 | |
| 125 | void GenerateVBaseOffsets(const CXXRecordDecl *RD, uint64_t Offset, |
Mike Stump | ab28c13 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 126 | bool updateVBIndex, Index_t current_vbindex) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 127 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 128 | e = RD->bases_end(); i != e; ++i) { |
| 129 | const CXXRecordDecl *Base = |
| 130 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
Mike Stump | ab28c13 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 131 | Index_t next_vbindex = current_vbindex; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 132 | if (i->isVirtual() && !SeenVBase.count(Base)) { |
| 133 | SeenVBase.insert(Base); |
Mike Stump | ab28c13 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 134 | if (updateVBIndex) { |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 135 | next_vbindex = (ssize_t)(-(VCalls.size()*LLVMPointerWidth/8) |
Mike Stump | ab28c13 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 136 | - 3*LLVMPointerWidth/8); |
| 137 | VBIndex[Base] = next_vbindex; |
| 138 | } |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 139 | int64_t BaseOffset = -(Offset/8) + BLayout.getVBaseClassOffset(Base)/8; |
| 140 | VCalls.push_back((0?700:0) + BaseOffset); |
| 141 | D1(printf(" vbase for %s at %d delta %d most derived %s\n", |
| 142 | Base->getNameAsCString(), |
| 143 | (int)-VCalls.size()-3, (int)BaseOffset, |
| 144 | Class->getNameAsCString())); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 145 | } |
Mike Stump | ab28c13 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 146 | // We also record offsets for non-virtual bases to closest enclosing |
| 147 | // virtual base. We do this so that we don't have to search |
| 148 | // for the nearst virtual base class when generating thunks. |
| 149 | if (updateVBIndex && VBIndex.count(Base) == 0) |
| 150 | VBIndex[Base] = next_vbindex; |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 151 | GenerateVBaseOffsets(Base, Offset, updateVBIndex, next_vbindex); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 152 | } |
| 153 | } |
| 154 | |
| 155 | void StartNewTable() { |
| 156 | SeenVBase.clear(); |
| 157 | } |
| 158 | |
| 159 | Index_t VBlookup(CXXRecordDecl *D, CXXRecordDecl *B); |
| 160 | |
Mike Stump | 3425b97 | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 161 | Index_t getNVOffset_1(const CXXRecordDecl *D, const CXXRecordDecl *B, |
| 162 | Index_t Offset = 0) { |
| 163 | |
| 164 | if (B == D) |
| 165 | return Offset; |
| 166 | |
| 167 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(D); |
| 168 | for (CXXRecordDecl::base_class_const_iterator i = D->bases_begin(), |
| 169 | e = D->bases_end(); i != e; ++i) { |
| 170 | const CXXRecordDecl *Base = |
| 171 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 172 | int64_t BaseOffset = 0; |
| 173 | if (!i->isVirtual()) |
| 174 | BaseOffset = Offset + Layout.getBaseClassOffset(Base); |
| 175 | int64_t o = getNVOffset_1(Base, B, BaseOffset); |
| 176 | if (o >= 0) |
| 177 | return o; |
| 178 | } |
| 179 | |
| 180 | return -1; |
| 181 | } |
| 182 | |
| 183 | /// getNVOffset - Returns the non-virtual offset for the given (B) base of the |
| 184 | /// derived class D. |
| 185 | Index_t getNVOffset(QualType qB, QualType qD) { |
Mike Stump | 9c21289 | 2009-11-03 19:03:17 +0000 | [diff] [blame] | 186 | qD = qD->getPointeeType(); |
| 187 | qB = qB->getPointeeType(); |
Mike Stump | 3425b97 | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 188 | CXXRecordDecl *D = cast<CXXRecordDecl>(qD->getAs<RecordType>()->getDecl()); |
| 189 | CXXRecordDecl *B = cast<CXXRecordDecl>(qB->getAs<RecordType>()->getDecl()); |
| 190 | int64_t o = getNVOffset_1(D, B); |
| 191 | if (o >= 0) |
| 192 | return o; |
| 193 | |
| 194 | assert(false && "FIXME: non-virtual base not found"); |
| 195 | return 0; |
| 196 | } |
| 197 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 198 | /// getVbaseOffset - Returns the index into the vtable for the virtual base |
| 199 | /// offset for the given (B) virtual base of the derived class D. |
| 200 | Index_t getVbaseOffset(QualType qB, QualType qD) { |
Mike Stump | 9c21289 | 2009-11-03 19:03:17 +0000 | [diff] [blame] | 201 | qD = qD->getPointeeType(); |
| 202 | qB = qB->getPointeeType(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 203 | CXXRecordDecl *D = cast<CXXRecordDecl>(qD->getAs<RecordType>()->getDecl()); |
| 204 | CXXRecordDecl *B = cast<CXXRecordDecl>(qB->getAs<RecordType>()->getDecl()); |
| 205 | if (D != Class) |
| 206 | return VBlookup(D, B); |
| 207 | llvm::DenseMap<const CXXRecordDecl *, Index_t>::iterator i; |
| 208 | i = VBIndex.find(B); |
| 209 | if (i != VBIndex.end()) |
| 210 | return i->second; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 211 | |
Mike Stump | ab28c13 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 212 | assert(false && "FIXME: Base not found"); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 213 | return 0; |
| 214 | } |
| 215 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 216 | bool OverrideMethod(GlobalDecl GD, llvm::Constant *m, |
Mike Stump | 3425b97 | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 217 | bool MorallyVirtual, Index_t OverrideOffset, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 218 | Index_t Offset, int64_t CurrentVBaseOffset) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 219 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); |
| 220 | |
Mike Stump | 7809e0d | 2009-10-28 00:35:46 +0000 | [diff] [blame] | 221 | const bool isPure = MD->isPure(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 222 | typedef CXXMethodDecl::method_iterator meth_iter; |
Mike Stump | 3425b97 | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 223 | // FIXME: Should OverrideOffset's be Offset? |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 224 | |
| 225 | // FIXME: Don't like the nested loops. For very large inheritance |
| 226 | // heirarchies we could have a table on the side with the final overridder |
| 227 | // and just replace each instance of an overridden method once. Would be |
| 228 | // nice to measure the cost/benefit on real code. |
| 229 | |
| 230 | for (meth_iter mi = MD->begin_overridden_methods(), |
| 231 | e = MD->end_overridden_methods(); |
| 232 | mi != e; ++mi) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 233 | GlobalDecl OGD; |
| 234 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 235 | const CXXMethodDecl *OMD = *mi; |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 236 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(OMD)) |
| 237 | OGD = GlobalDecl(DD, GD.getDtorType()); |
| 238 | else |
| 239 | OGD = OMD; |
| 240 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 241 | llvm::Constant *om; |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 242 | om = WrapAddrOf(OGD); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 243 | om = llvm::ConstantExpr::getBitCast(om, Ptr8Ty); |
| 244 | |
| 245 | for (Index_t i = 0, e = submethods.size(); |
| 246 | i != e; ++i) { |
| 247 | // FIXME: begin_overridden_methods might be too lax, covariance */ |
| 248 | if (submethods[i] != om) |
| 249 | continue; |
| 250 | QualType nc_oret = OMD->getType()->getAs<FunctionType>()->getResultType(); |
| 251 | CanQualType oret = CGM.getContext().getCanonicalType(nc_oret); |
| 252 | QualType nc_ret = MD->getType()->getAs<FunctionType>()->getResultType(); |
| 253 | CanQualType ret = CGM.getContext().getCanonicalType(nc_ret); |
| 254 | CallOffset ReturnOffset = std::make_pair(0, 0); |
| 255 | if (oret != ret) { |
| 256 | // FIXME: calculate offsets for covariance |
Mike Stump | d9878a1 | 2009-10-13 10:55:21 +0000 | [diff] [blame] | 257 | if (CovariantThunks.count(OMD)) { |
| 258 | oret = CovariantThunks[OMD].second; |
| 259 | CovariantThunks.erase(OMD); |
| 260 | } |
Mike Stump | 3425b97 | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 261 | // FIXME: Double check oret |
| 262 | Index_t nv = getNVOffset(oret, ret)/8; |
Mike Stump | d9878a1 | 2009-10-13 10:55:21 +0000 | [diff] [blame] | 263 | ReturnOffset = std::make_pair(nv, getVbaseOffset(oret, ret)); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 264 | } |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 265 | Index[GD] = i; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 266 | submethods[i] = m; |
Mike Stump | 7809e0d | 2009-10-28 00:35:46 +0000 | [diff] [blame] | 267 | if (isPure) |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 268 | Pures[GD] = 1; |
| 269 | Pures.erase(OGD); |
| 270 | Thunks.erase(OGD); |
| 271 | if (MorallyVirtual || VCall.count(OGD)) { |
| 272 | Index_t &idx = VCall[OGD]; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 273 | if (idx == 0) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 274 | NonVirtualOffset[GD] = -OverrideOffset/8 + CurrentVBaseOffset/8; |
| 275 | VCallOffset[GD] = OverrideOffset/8; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 276 | idx = VCalls.size()+1; |
| 277 | VCalls.push_back(0); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 278 | D1(printf(" vcall for %s at %d with delta %d most derived %s\n", |
Mike Stump | e99cc45 | 2009-11-13 23:45:53 +0000 | [diff] [blame] | 279 | MD->getNameAsString().c_str(), (int)-idx-3, |
| 280 | (int)VCalls[idx-1], Class->getNameAsCString())); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 281 | } else { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 282 | NonVirtualOffset[GD] = NonVirtualOffset[OGD]; |
| 283 | VCallOffset[GD] = VCallOffset[OGD]; |
| 284 | VCalls[idx-1] = -VCallOffset[OGD] + OverrideOffset/8; |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 285 | D1(printf(" vcall patch for %s at %d with delta %d most derived %s\n", |
Mike Stump | e99cc45 | 2009-11-13 23:45:53 +0000 | [diff] [blame] | 286 | MD->getNameAsString().c_str(), (int)-idx-3, |
| 287 | (int)VCalls[idx-1], Class->getNameAsCString())); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 288 | } |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 289 | VCall[GD] = idx; |
| 290 | int64_t O = NonVirtualOffset[GD]; |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 291 | int v = -((idx+extra+2)*LLVMPointerWidth/8); |
| 292 | // Optimize out virtual adjustments of 0. |
| 293 | if (VCalls[idx-1] == 0) |
| 294 | v = 0; |
| 295 | CallOffset ThisOffset = std::make_pair(O, v); |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 296 | // FIXME: Do we always have to build a covariant thunk to save oret, |
| 297 | // which is the containing virtual base class? |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 298 | if (ReturnOffset.first || ReturnOffset.second) |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 299 | CovariantThunks[GD] = std::make_pair(std::make_pair(ThisOffset, |
Mike Stump | d9878a1 | 2009-10-13 10:55:21 +0000 | [diff] [blame] | 300 | ReturnOffset), |
| 301 | oret); |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 302 | else if (!isPure && (ThisOffset.first || ThisOffset.second)) |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 303 | Thunks[GD] = ThisOffset; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 304 | return true; |
| 305 | } |
Mike Stump | ab28c13 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 306 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 307 | // FIXME: finish off |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 308 | int64_t O = VCallOffset[OGD] - OverrideOffset/8; |
Mike Stump | 33c530e | 2009-11-06 02:38:24 +0000 | [diff] [blame] | 309 | |
Mike Stump | ab28c13 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 310 | if (O || ReturnOffset.first || ReturnOffset.second) { |
| 311 | CallOffset ThisOffset = std::make_pair(O, 0); |
| 312 | |
| 313 | if (ReturnOffset.first || ReturnOffset.second) |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 314 | CovariantThunks[GD] = std::make_pair(std::make_pair(ThisOffset, |
Mike Stump | ab28c13 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 315 | ReturnOffset), |
| 316 | oret); |
Mike Stump | 7809e0d | 2009-10-28 00:35:46 +0000 | [diff] [blame] | 317 | else if (!isPure) |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 318 | Thunks[GD] = ThisOffset; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 319 | } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 320 | return true; |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | return false; |
| 325 | } |
| 326 | |
| 327 | void InstallThunks() { |
| 328 | for (Thunks_t::iterator i = Thunks.begin(), e = Thunks.end(); |
| 329 | i != e; ++i) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 330 | GlobalDecl GD = i->first; |
| 331 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); |
Mike Stump | 7809e0d | 2009-10-28 00:35:46 +0000 | [diff] [blame] | 332 | assert(!MD->isPure() && "Trying to thunk a pure"); |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 333 | Index_t idx = Index[GD]; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 334 | Index_t nv_O = i->second.first; |
| 335 | Index_t v_O = i->second.second; |
| 336 | submethods[idx] = CGM.BuildThunk(MD, Extern, nv_O, v_O); |
| 337 | } |
| 338 | Thunks.clear(); |
| 339 | for (CovariantThunks_t::iterator i = CovariantThunks.begin(), |
| 340 | e = CovariantThunks.end(); |
| 341 | i != e; ++i) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 342 | GlobalDecl GD = i->first; |
| 343 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); |
Mike Stump | 7809e0d | 2009-10-28 00:35:46 +0000 | [diff] [blame] | 344 | if (MD->isPure()) |
| 345 | continue; |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 346 | Index_t idx = Index[GD]; |
Mike Stump | d9878a1 | 2009-10-13 10:55:21 +0000 | [diff] [blame] | 347 | Index_t nv_t = i->second.first.first.first; |
| 348 | Index_t v_t = i->second.first.first.second; |
| 349 | Index_t nv_r = i->second.first.second.first; |
| 350 | Index_t v_r = i->second.first.second.second; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 351 | submethods[idx] = CGM.BuildCovariantThunk(MD, Extern, nv_t, v_t, nv_r, |
| 352 | v_r); |
| 353 | } |
| 354 | CovariantThunks.clear(); |
Mike Stump | 94aff93 | 2009-10-27 23:46:47 +0000 | [diff] [blame] | 355 | for (Pures_t::iterator i = Pures.begin(), e = Pures.end(); |
| 356 | i != e; ++i) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 357 | GlobalDecl GD = i->first; |
| 358 | Index_t idx = Index[GD]; |
Mike Stump | 94aff93 | 2009-10-27 23:46:47 +0000 | [diff] [blame] | 359 | submethods[idx] = cxa_pure; |
| 360 | } |
| 361 | Pures.clear(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 362 | } |
| 363 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 364 | llvm::Constant *WrapAddrOf(GlobalDecl GD) { |
| 365 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); |
| 366 | |
Mike Stump | 1ae3178 | 2009-10-27 23:36:26 +0000 | [diff] [blame] | 367 | if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(MD)) |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 368 | return wrap(CGM.GetAddrOfCXXDestructor(Dtor, GD.getDtorType())); |
Mike Stump | 1ae3178 | 2009-10-27 23:36:26 +0000 | [diff] [blame] | 369 | |
Anders Carlsson | ecf282b | 2009-11-24 05:08:52 +0000 | [diff] [blame] | 370 | const llvm::Type *Ty = CGM.getTypes().GetFunctionTypeForVtable(MD); |
Mike Stump | 1ae3178 | 2009-10-27 23:36:26 +0000 | [diff] [blame] | 371 | |
| 372 | return wrap(CGM.GetAddrOfFunction(MD, Ty)); |
| 373 | } |
| 374 | |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 375 | void OverrideMethods(Path_t *Path, bool MorallyVirtual, int64_t Offset, |
| 376 | int64_t CurrentVBaseOffset) { |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 377 | for (Path_t::reverse_iterator i = Path->rbegin(), |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 378 | e = Path->rend(); i != e; ++i) { |
| 379 | const CXXRecordDecl *RD = i->first; |
Mike Stump | 3425b97 | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 380 | int64_t OverrideOffset = i->second; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 381 | for (method_iter mi = RD->method_begin(), me = RD->method_end(); mi != me; |
| 382 | ++mi) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 383 | const CXXMethodDecl *MD = *mi; |
| 384 | |
| 385 | if (!MD->isVirtual()) |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 386 | continue; |
| 387 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 388 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(MD)) { |
| 389 | // Override both the complete and the deleting destructor. |
| 390 | GlobalDecl CompDtor(DD, Dtor_Complete); |
| 391 | OverrideMethod(CompDtor, WrapAddrOf(CompDtor), MorallyVirtual, |
| 392 | OverrideOffset, Offset, CurrentVBaseOffset); |
| 393 | |
| 394 | GlobalDecl DeletingDtor(DD, Dtor_Deleting); |
| 395 | OverrideMethod(DeletingDtor, WrapAddrOf(DeletingDtor), MorallyVirtual, |
| 396 | OverrideOffset, Offset, CurrentVBaseOffset); |
| 397 | } else { |
| 398 | OverrideMethod(MD, WrapAddrOf(MD), MorallyVirtual, OverrideOffset, |
| 399 | Offset, CurrentVBaseOffset); |
| 400 | } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 401 | } |
| 402 | } |
| 403 | } |
| 404 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 405 | void AddMethod(const GlobalDecl GD, bool MorallyVirtual, Index_t Offset, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 406 | bool ForVirtualBase, int64_t CurrentVBaseOffset) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 407 | llvm::Constant *m = WrapAddrOf(GD); |
Mike Stump | 1ae3178 | 2009-10-27 23:36:26 +0000 | [diff] [blame] | 408 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 409 | // If we can find a previously allocated slot for this, reuse it. |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 410 | if (OverrideMethod(GD, m, MorallyVirtual, Offset, Offset, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 411 | CurrentVBaseOffset)) |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 412 | return; |
| 413 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 414 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); |
| 415 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 416 | // else allocate a new slot. |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 417 | Index[GD] = submethods.size(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 418 | submethods.push_back(m); |
Mike Stump | e99cc45 | 2009-11-13 23:45:53 +0000 | [diff] [blame] | 419 | D1(printf(" vfn for %s at %d\n", MD->getNameAsString().c_str(), |
| 420 | (int)Index[GD])); |
Mike Stump | 7809e0d | 2009-10-28 00:35:46 +0000 | [diff] [blame] | 421 | if (MD->isPure()) |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 422 | Pures[GD] = 1; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 423 | if (MorallyVirtual) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 424 | VCallOffset[GD] = Offset/8; |
| 425 | Index_t &idx = VCall[GD]; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 426 | // Allocate the first one, after that, we reuse the previous one. |
| 427 | if (idx == 0) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 428 | NonVirtualOffset[GD] = CurrentVBaseOffset/8 - Offset/8; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 429 | idx = VCalls.size()+1; |
| 430 | VCalls.push_back(0); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 431 | D1(printf(" vcall for %s at %d with delta %d\n", |
Mike Stump | e99cc45 | 2009-11-13 23:45:53 +0000 | [diff] [blame] | 432 | MD->getNameAsString().c_str(), (int)-VCalls.size()-3, 0)); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 433 | } |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | void AddMethods(const CXXRecordDecl *RD, bool MorallyVirtual, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 438 | Index_t Offset, bool RDisVirtualBase, |
| 439 | int64_t CurrentVBaseOffset) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 440 | for (method_iter mi = RD->method_begin(), me = RD->method_end(); mi != me; |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 441 | ++mi) { |
| 442 | const CXXMethodDecl *MD = *mi; |
| 443 | if (!MD->isVirtual()) |
| 444 | continue; |
| 445 | |
| 446 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(MD)) { |
| 447 | // For destructors, add both the complete and the deleting destructor |
| 448 | // to the vtable. |
| 449 | AddMethod(GlobalDecl(DD, Dtor_Complete), MorallyVirtual, Offset, |
| 450 | RDisVirtualBase, CurrentVBaseOffset); |
| 451 | AddMethod(GlobalDecl(DD, Dtor_Deleting), MorallyVirtual, Offset, |
| 452 | RDisVirtualBase, CurrentVBaseOffset); |
| 453 | } else |
| 454 | AddMethod(MD, MorallyVirtual, Offset, RDisVirtualBase, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 455 | CurrentVBaseOffset); |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 456 | } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | void NonVirtualBases(const CXXRecordDecl *RD, const ASTRecordLayout &Layout, |
| 460 | const CXXRecordDecl *PrimaryBase, |
| 461 | bool PrimaryBaseWasVirtual, bool MorallyVirtual, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 462 | int64_t Offset, int64_t CurrentVBaseOffset, |
| 463 | Path_t *Path) { |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 464 | Path->push_back(std::make_pair(RD, Offset)); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 465 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 466 | e = RD->bases_end(); i != e; ++i) { |
| 467 | if (i->isVirtual()) |
| 468 | continue; |
| 469 | const CXXRecordDecl *Base = |
| 470 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 471 | if (Base != PrimaryBase || PrimaryBaseWasVirtual) { |
| 472 | uint64_t o = Offset + Layout.getBaseClassOffset(Base); |
| 473 | StartNewTable(); |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 474 | GenerateVtableForBase(Base, o, MorallyVirtual, false, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 475 | CurrentVBaseOffset, Path); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 476 | } |
| 477 | } |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 478 | Path->pop_back(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 479 | } |
| 480 | |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 481 | // #define D(X) do { X; } while (0) |
| 482 | #define D(X) |
| 483 | |
| 484 | void insertVCalls(int InsertionPoint) { |
| 485 | llvm::Constant *e = 0; |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 486 | D1(printf("============= combining vbase/vcall\n")); |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 487 | D(VCalls.insert(VCalls.begin(), 673)); |
| 488 | D(VCalls.push_back(672)); |
Mike Stump | 3425b97 | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 489 | methods.insert(methods.begin() + InsertionPoint, VCalls.size(), e); |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 490 | // The vcalls come first... |
| 491 | for (std::vector<Index_t>::reverse_iterator i = VCalls.rbegin(), |
| 492 | e = VCalls.rend(); |
| 493 | i != e; ++i) |
| 494 | methods[InsertionPoint++] = wrap((0?600:0) + *i); |
| 495 | VCalls.clear(); |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 496 | VCall.clear(); |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 497 | } |
| 498 | |
Mike Stump | 65d0e28 | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 499 | void AddAddressPoints(const CXXRecordDecl *RD, uint64_t Offset, |
| 500 | Index_t AddressPoint) { |
| 501 | D1(printf("XXX address point for %s in %s layout %s at offset %d is %d\n", |
| 502 | RD->getNameAsCString(), Class->getNameAsCString(), |
| 503 | LayoutClass->getNameAsCString(), (int)Offset, (int)AddressPoint)); |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 504 | subAddressPoints[std::make_pair(RD, Offset)] = AddressPoint; |
Mike Stump | 65d0e28 | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 505 | |
| 506 | // Now also add the address point for all our primary bases. |
| 507 | while (1) { |
| 508 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 509 | RD = Layout.getPrimaryBase(); |
| 510 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 511 | // FIXME: Double check this. |
| 512 | if (RD == 0) |
| 513 | break; |
| 514 | if (PrimaryBaseWasVirtual && |
| 515 | BLayout.getVBaseClassOffset(RD) != Offset) |
| 516 | break; |
| 517 | D1(printf("XXX address point for %s in %s layout %s at offset %d is %d\n", |
| 518 | RD->getNameAsCString(), Class->getNameAsCString(), |
| 519 | LayoutClass->getNameAsCString(), (int)Offset, (int)AddressPoint)); |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 520 | subAddressPoints[std::make_pair(RD, Offset)] = AddressPoint; |
Mike Stump | 65d0e28 | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 521 | } |
| 522 | } |
| 523 | |
| 524 | |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 525 | Index_t end(const CXXRecordDecl *RD, const ASTRecordLayout &Layout, |
| 526 | const CXXRecordDecl *PrimaryBase, bool PrimaryBaseWasVirtual, |
| 527 | bool MorallyVirtual, int64_t Offset, bool ForVirtualBase, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 528 | int64_t CurrentVBaseOffset, |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 529 | Path_t *Path) { |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 530 | bool alloc = false; |
| 531 | if (Path == 0) { |
| 532 | alloc = true; |
| 533 | Path = new Path_t; |
| 534 | } |
| 535 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 536 | StartNewTable(); |
| 537 | extra = 0; |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 538 | bool DeferVCalls = MorallyVirtual || ForVirtualBase; |
| 539 | int VCallInsertionPoint = methods.size(); |
| 540 | if (!DeferVCalls) { |
| 541 | insertVCalls(VCallInsertionPoint); |
Mike Stump | 3425b97 | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 542 | } else |
| 543 | // FIXME: just for extra, or for all uses of VCalls.size post this? |
| 544 | extra = -VCalls.size(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 545 | |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 546 | methods.push_back(wrap(-((Offset-LayoutOffset)/8))); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 547 | methods.push_back(rtti); |
| 548 | Index_t AddressPoint = methods.size(); |
| 549 | |
| 550 | InstallThunks(); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 551 | D1(printf("============= combining methods\n")); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 552 | methods.insert(methods.end(), submethods.begin(), submethods.end()); |
| 553 | submethods.clear(); |
| 554 | |
| 555 | // and then the non-virtual bases. |
| 556 | NonVirtualBases(RD, Layout, PrimaryBase, PrimaryBaseWasVirtual, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 557 | MorallyVirtual, Offset, CurrentVBaseOffset, Path); |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 558 | |
| 559 | if (ForVirtualBase) { |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 560 | // FIXME: We're adding to VCalls in callers, we need to do the overrides |
| 561 | // in the inner part, so that we know the complete set of vcalls during |
| 562 | // the build and don't have to insert into methods. Saving out the |
| 563 | // AddressPoint here, would need to be fixed, if we didn't do that. Also |
| 564 | // retroactively adding vcalls for overrides later wind up in the wrong |
| 565 | // place, the vcall slot has to be alloted during the walk of the base |
| 566 | // when the function is first introduces. |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 567 | AddressPoint += VCalls.size(); |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 568 | insertVCalls(VCallInsertionPoint); |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 569 | } |
| 570 | |
Mike Stump | 65d0e28 | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 571 | AddAddressPoints(RD, Offset, AddressPoint); |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 572 | |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 573 | if (alloc) { |
| 574 | delete Path; |
| 575 | } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 576 | return AddressPoint; |
| 577 | } |
| 578 | |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 579 | void Primaries(const CXXRecordDecl *RD, bool MorallyVirtual, int64_t Offset, |
| 580 | bool updateVBIndex, Index_t current_vbindex, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 581 | bool RDisVirtualBase, int64_t CurrentVBaseOffset) { |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 582 | if (!RD->isDynamicClass()) |
| 583 | return; |
| 584 | |
| 585 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 586 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 587 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 588 | |
| 589 | // vtables are composed from the chain of primaries. |
| 590 | if (PrimaryBase) { |
| 591 | D1(printf(" doing primaries for %s most derived %s\n", |
| 592 | RD->getNameAsCString(), Class->getNameAsCString())); |
| 593 | |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 594 | int BaseCurrentVBaseOffset = CurrentVBaseOffset; |
| 595 | if (PrimaryBaseWasVirtual) |
| 596 | BaseCurrentVBaseOffset = BLayout.getVBaseClassOffset(PrimaryBase); |
| 597 | |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 598 | if (!PrimaryBaseWasVirtual) |
| 599 | Primaries(PrimaryBase, PrimaryBaseWasVirtual|MorallyVirtual, Offset, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 600 | updateVBIndex, current_vbindex, PrimaryBaseWasVirtual, |
| 601 | BaseCurrentVBaseOffset); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 602 | } |
| 603 | |
| 604 | D1(printf(" doing vcall entries for %s most derived %s\n", |
| 605 | RD->getNameAsCString(), Class->getNameAsCString())); |
| 606 | |
| 607 | // And add the virtuals for the class to the primary vtable. |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 608 | AddMethods(RD, MorallyVirtual, Offset, RDisVirtualBase, CurrentVBaseOffset); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 609 | } |
| 610 | |
| 611 | void VBPrimaries(const CXXRecordDecl *RD, bool MorallyVirtual, int64_t Offset, |
| 612 | bool updateVBIndex, Index_t current_vbindex, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 613 | bool RDisVirtualBase, int64_t CurrentVBaseOffset, |
| 614 | bool bottom=false) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 615 | if (!RD->isDynamicClass()) |
| 616 | return; |
| 617 | |
| 618 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 619 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 620 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 621 | |
| 622 | // vtables are composed from the chain of primaries. |
| 623 | if (PrimaryBase) { |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 624 | int BaseCurrentVBaseOffset = CurrentVBaseOffset; |
| 625 | if (PrimaryBaseWasVirtual) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 626 | IndirectPrimary.insert(PrimaryBase); |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 627 | BaseCurrentVBaseOffset = BLayout.getVBaseClassOffset(PrimaryBase); |
| 628 | } |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 629 | |
| 630 | D1(printf(" doing primaries for %s most derived %s\n", |
| 631 | RD->getNameAsCString(), Class->getNameAsCString())); |
| 632 | |
| 633 | VBPrimaries(PrimaryBase, PrimaryBaseWasVirtual|MorallyVirtual, Offset, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 634 | updateVBIndex, current_vbindex, PrimaryBaseWasVirtual, |
| 635 | BaseCurrentVBaseOffset); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 636 | } |
| 637 | |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 638 | D1(printf(" doing vbase entries for %s most derived %s\n", |
| 639 | RD->getNameAsCString(), Class->getNameAsCString())); |
| 640 | GenerateVBaseOffsets(RD, Offset, updateVBIndex, current_vbindex); |
| 641 | |
| 642 | if (RDisVirtualBase || bottom) { |
| 643 | Primaries(RD, MorallyVirtual, Offset, updateVBIndex, current_vbindex, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 644 | RDisVirtualBase, CurrentVBaseOffset); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 645 | } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 646 | } |
| 647 | |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 648 | int64_t GenerateVtableForBase(const CXXRecordDecl *RD, int64_t Offset = 0, |
| 649 | bool MorallyVirtual = false, |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 650 | bool ForVirtualBase = false, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 651 | int CurrentVBaseOffset = 0, |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 652 | Path_t *Path = 0) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 653 | if (!RD->isDynamicClass()) |
| 654 | return 0; |
| 655 | |
Mike Stump | 92774d1 | 2009-11-13 02:35:38 +0000 | [diff] [blame] | 656 | // Construction vtable don't need parts that have no virtual bases and |
| 657 | // aren't morally virtual. |
| 658 | if ((LayoutClass != Class) && RD->getNumVBases() == 0 && !MorallyVirtual) |
| 659 | return 0; |
| 660 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 661 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 662 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 663 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 664 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 665 | extra = 0; |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 666 | D1(printf("building entries for base %s most derived %s\n", |
| 667 | RD->getNameAsCString(), Class->getNameAsCString())); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 668 | |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 669 | if (ForVirtualBase) |
| 670 | extra = VCalls.size(); |
| 671 | |
| 672 | VBPrimaries(RD, MorallyVirtual, Offset, !ForVirtualBase, 0, ForVirtualBase, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 673 | CurrentVBaseOffset, true); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 674 | |
| 675 | if (Path) |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 676 | OverrideMethods(Path, MorallyVirtual, Offset, CurrentVBaseOffset); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 677 | |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 678 | return end(RD, Layout, PrimaryBase, PrimaryBaseWasVirtual, MorallyVirtual, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 679 | Offset, ForVirtualBase, CurrentVBaseOffset, Path); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 680 | } |
| 681 | |
| 682 | void GenerateVtableForVBases(const CXXRecordDecl *RD, |
| 683 | int64_t Offset = 0, |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 684 | Path_t *Path = 0) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 685 | bool alloc = false; |
| 686 | if (Path == 0) { |
| 687 | alloc = true; |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 688 | Path = new Path_t; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 689 | } |
| 690 | // FIXME: We also need to override using all paths to a virtual base, |
| 691 | // right now, we just process the first path |
| 692 | Path->push_back(std::make_pair(RD, Offset)); |
| 693 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 694 | e = RD->bases_end(); i != e; ++i) { |
| 695 | const CXXRecordDecl *Base = |
| 696 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 697 | if (i->isVirtual() && !IndirectPrimary.count(Base)) { |
| 698 | // Mark it so we don't output it twice. |
| 699 | IndirectPrimary.insert(Base); |
| 700 | StartNewTable(); |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 701 | VCall.clear(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 702 | int64_t BaseOffset = BLayout.getVBaseClassOffset(Base); |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 703 | int64_t CurrentVBaseOffset = BaseOffset; |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 704 | D1(printf("vtable %s virtual base %s\n", |
| 705 | Class->getNameAsCString(), Base->getNameAsCString())); |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 706 | GenerateVtableForBase(Base, BaseOffset, true, true, CurrentVBaseOffset, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 707 | Path); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 708 | } |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 709 | int64_t BaseOffset; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 710 | if (i->isVirtual()) |
| 711 | BaseOffset = BLayout.getVBaseClassOffset(Base); |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 712 | else { |
| 713 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 714 | BaseOffset = Offset + Layout.getBaseClassOffset(Base); |
| 715 | } |
| 716 | |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 717 | if (Base->getNumVBases()) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 718 | GenerateVtableForVBases(Base, BaseOffset, Path); |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 719 | } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 720 | } |
| 721 | Path->pop_back(); |
| 722 | if (alloc) |
| 723 | delete Path; |
| 724 | } |
| 725 | }; |
| 726 | |
| 727 | |
| 728 | VtableBuilder::Index_t VtableBuilder::VBlookup(CXXRecordDecl *D, |
| 729 | CXXRecordDecl *B) { |
| 730 | return CGM.getVtableInfo().getVirtualBaseOffsetIndex(D, B); |
| 731 | } |
| 732 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 733 | int64_t CGVtableInfo::getMethodVtableIndex(GlobalDecl GD) { |
| 734 | MethodVtableIndicesTy::iterator I = MethodVtableIndices.find(GD); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 735 | if (I != MethodVtableIndices.end()) |
| 736 | return I->second; |
| 737 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 738 | const CXXRecordDecl *RD = cast<CXXMethodDecl>(GD.getDecl())->getParent(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 739 | |
| 740 | std::vector<llvm::Constant *> methods; |
| 741 | // FIXME: This seems expensive. Can we do a partial job to get |
| 742 | // just this data. |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 743 | VtableBuilder b(methods, RD, RD, 0, CGM); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 744 | D1(printf("vtable %s\n", RD->getNameAsCString())); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 745 | b.GenerateVtableForBase(RD); |
| 746 | b.GenerateVtableForVBases(RD); |
| 747 | |
| 748 | MethodVtableIndices.insert(b.getIndex().begin(), |
| 749 | b.getIndex().end()); |
| 750 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 751 | I = MethodVtableIndices.find(GD); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 752 | assert(I != MethodVtableIndices.end() && "Did not find index!"); |
| 753 | return I->second; |
| 754 | } |
| 755 | |
| 756 | int64_t CGVtableInfo::getVirtualBaseOffsetIndex(const CXXRecordDecl *RD, |
| 757 | const CXXRecordDecl *VBase) { |
| 758 | ClassPairTy ClassPair(RD, VBase); |
| 759 | |
| 760 | VirtualBaseClassIndiciesTy::iterator I = |
| 761 | VirtualBaseClassIndicies.find(ClassPair); |
| 762 | if (I != VirtualBaseClassIndicies.end()) |
| 763 | return I->second; |
| 764 | |
| 765 | std::vector<llvm::Constant *> methods; |
| 766 | // FIXME: This seems expensive. Can we do a partial job to get |
| 767 | // just this data. |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 768 | VtableBuilder b(methods, RD, RD, 0, CGM); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 769 | D1(printf("vtable %s\n", RD->getNameAsCString())); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 770 | b.GenerateVtableForBase(RD); |
| 771 | b.GenerateVtableForVBases(RD); |
| 772 | |
| 773 | for (llvm::DenseMap<const CXXRecordDecl *, uint64_t>::iterator I = |
| 774 | b.getVBIndex().begin(), E = b.getVBIndex().end(); I != E; ++I) { |
| 775 | // Insert all types. |
| 776 | ClassPairTy ClassPair(RD, I->first); |
| 777 | |
| 778 | VirtualBaseClassIndicies.insert(std::make_pair(ClassPair, I->second)); |
| 779 | } |
| 780 | |
| 781 | I = VirtualBaseClassIndicies.find(ClassPair); |
| 782 | assert(I != VirtualBaseClassIndicies.end() && "Did not find index!"); |
| 783 | |
| 784 | return I->second; |
| 785 | } |
| 786 | |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 787 | llvm::Constant *CodeGenModule::GenerateVtable(const CXXRecordDecl *LayoutClass, |
| 788 | const CXXRecordDecl *RD, |
Mike Stump | 8cfcb52 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 789 | uint64_t Offset) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 790 | llvm::SmallString<256> OutName; |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 791 | if (LayoutClass != RD) |
Daniel Dunbar | 94fd26d | 2009-11-21 09:06:22 +0000 | [diff] [blame] | 792 | getMangleContext().mangleCXXCtorVtable(LayoutClass, Offset/8, RD, OutName); |
Mike Stump | 8cfcb52 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 793 | else |
Daniel Dunbar | 94fd26d | 2009-11-21 09:06:22 +0000 | [diff] [blame] | 794 | getMangleContext().mangleCXXVtable(RD, OutName); |
| 795 | llvm::StringRef Name = OutName.str(); |
Benjamin Kramer | 7a9474e | 2009-10-11 22:57:54 +0000 | [diff] [blame] | 796 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 797 | std::vector<llvm::Constant *> methods; |
| 798 | llvm::Type *Ptr8Ty=llvm::PointerType::get(llvm::Type::getInt8Ty(VMContext),0); |
| 799 | int64_t AddressPoint; |
| 800 | |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 801 | llvm::GlobalVariable *GV = getModule().getGlobalVariable(Name); |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 802 | if (GV && AddressPoints[LayoutClass] && !GV->isDeclaration()) { |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 803 | AddressPoint=(*(*(AddressPoints[LayoutClass]))[RD])[std::make_pair(RD, |
| 804 | Offset)]; |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 805 | // FIXME: We can never have 0 address point. Do this for now so gepping |
| 806 | // retains the same structure. Later, we'll just assert. |
| 807 | if (AddressPoint == 0) |
| 808 | AddressPoint = 1; |
| 809 | } else { |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 810 | VtableBuilder b(methods, RD, LayoutClass, Offset, *this); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 811 | |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 812 | D1(printf("vtable %s\n", RD->getNameAsCString())); |
| 813 | // First comes the vtables for all the non-virtual bases... |
| 814 | AddressPoint = b.GenerateVtableForBase(RD, Offset); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 815 | |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 816 | // then the vtables for all the virtual bases. |
| 817 | b.GenerateVtableForVBases(RD, Offset); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 818 | |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 819 | bool CreateDefinition = true; |
| 820 | if (LayoutClass != RD) |
| 821 | CreateDefinition = true; |
| 822 | else { |
| 823 | // We have to convert it to have a record layout. |
| 824 | Types.ConvertTagDeclType(LayoutClass); |
| 825 | const CGRecordLayout &CGLayout = Types.getCGRecordLayout(LayoutClass); |
| 826 | if (const CXXMethodDecl *KeyFunction = CGLayout.getKeyFunction()) { |
| 827 | if (!KeyFunction->getBody()) { |
| 828 | // If there is a KeyFunction, and it isn't defined, just build a |
| 829 | // reference to the vtable. |
| 830 | CreateDefinition = false; |
| 831 | } |
| 832 | } |
| 833 | } |
| 834 | |
| 835 | llvm::Constant *C = 0; |
| 836 | llvm::Type *type = Ptr8Ty; |
| 837 | llvm::GlobalVariable::LinkageTypes linktype |
| 838 | = llvm::GlobalValue::ExternalLinkage; |
| 839 | if (CreateDefinition) { |
| 840 | llvm::ArrayType *ntype = llvm::ArrayType::get(Ptr8Ty, methods.size()); |
| 841 | C = llvm::ConstantArray::get(ntype, methods); |
| 842 | linktype = llvm::GlobalValue::LinkOnceODRLinkage; |
| 843 | if (LayoutClass->isInAnonymousNamespace()) |
| 844 | linktype = llvm::GlobalValue::InternalLinkage; |
| 845 | type = ntype; |
| 846 | } |
| 847 | llvm::GlobalVariable *OGV = GV; |
| 848 | GV = new llvm::GlobalVariable(getModule(), type, true, linktype, C, Name); |
| 849 | if (OGV) { |
| 850 | GV->takeName(OGV); |
| 851 | llvm::Constant *NewPtr = llvm::ConstantExpr::getBitCast(GV, |
| 852 | OGV->getType()); |
| 853 | OGV->replaceAllUsesWith(NewPtr); |
| 854 | OGV->eraseFromParent(); |
| 855 | } |
| 856 | bool Hidden = getDeclVisibilityMode(RD) == LangOptions::Hidden; |
| 857 | if (Hidden) |
| 858 | GV->setVisibility(llvm::GlobalVariable::HiddenVisibility); |
| 859 | } |
Mike Stump | e56ceca | 2009-11-18 04:00:48 +0000 | [diff] [blame] | 860 | llvm::Constant *vtable = llvm::ConstantExpr::getBitCast(GV, Ptr8Ty); |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 861 | llvm::Constant *AddressPointC; |
| 862 | uint32_t LLVMPointerWidth = getContext().Target.getPointerWidth(0); |
| 863 | AddressPointC = llvm::ConstantInt::get(llvm::Type::getInt64Ty(VMContext), |
| 864 | AddressPoint*LLVMPointerWidth/8); |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 865 | vtable = llvm::ConstantExpr::getInBoundsGetElementPtr(vtable, &AddressPointC, |
| 866 | 1); |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 867 | |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 868 | assert(vtable->getType() == Ptr8Ty); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 869 | return vtable; |
| 870 | } |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 871 | |
| 872 | class VTTBuilder { |
| 873 | /// Inits - The list of values built for the VTT. |
| 874 | std::vector<llvm::Constant *> &Inits; |
| 875 | /// Class - The most derived class that this vtable is being built for. |
| 876 | const CXXRecordDecl *Class; |
| 877 | CodeGenModule &CGM; // Per-module state. |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 878 | llvm::SmallSet<const CXXRecordDecl *, 32> SeenVBase; |
Mike Stump | aee8de3 | 2009-11-11 03:08:24 +0000 | [diff] [blame] | 879 | /// BLayout - Layout for the most derived class that this vtable is being |
| 880 | /// built for. |
| 881 | const ASTRecordLayout &BLayout; |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 882 | CodeGenModule::AddrMap_t &AddressPoints; |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 883 | // vtbl - A pointer to the vtable for Class. |
| 884 | llvm::Constant *ClassVtbl; |
| 885 | llvm::LLVMContext &VMContext; |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 886 | |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 887 | /// BuildVtablePtr - Build up a referene to the given secondary vtable |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 888 | llvm::Constant *BuildVtablePtr(llvm::Constant *vtbl, |
| 889 | const CXXRecordDecl *VtblClass, |
| 890 | const CXXRecordDecl *RD, |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 891 | uint64_t Offset) { |
| 892 | int64_t AddressPoint; |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 893 | AddressPoint = (*AddressPoints[VtblClass])[std::make_pair(RD, Offset)]; |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 894 | // FIXME: We can never have 0 address point. Do this for now so gepping |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 895 | // retains the same structure. Later we'll just assert. |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 896 | if (AddressPoint == 0) |
| 897 | AddressPoint = 1; |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 898 | D1(printf("XXX address point for %s in %s layout %s at offset %d was %d\n", |
| 899 | RD->getNameAsCString(), VtblClass->getNameAsCString(), |
| 900 | Class->getNameAsCString(), (int)Offset, (int)AddressPoint)); |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 901 | uint32_t LLVMPointerWidth = CGM.getContext().Target.getPointerWidth(0); |
| 902 | llvm::Constant *init; |
| 903 | init = llvm::ConstantInt::get(llvm::Type::getInt64Ty(VMContext), |
| 904 | AddressPoint*LLVMPointerWidth/8); |
| 905 | init = llvm::ConstantExpr::getInBoundsGetElementPtr(vtbl, &init, 1); |
| 906 | return init; |
| 907 | } |
| 908 | |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 909 | /// Secondary - Add the secondary vtable pointers to Inits. Offset is the |
| 910 | /// current offset in bits to the object we're working on. |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 911 | void Secondary(const CXXRecordDecl *RD, llvm::Constant *vtbl, |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 912 | const CXXRecordDecl *VtblClass, uint64_t Offset=0, |
| 913 | bool MorallyVirtual=false) { |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 914 | if (RD->getNumVBases() == 0 && ! MorallyVirtual) |
| 915 | return; |
| 916 | |
| 917 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 918 | e = RD->bases_end(); i != e; ++i) { |
| 919 | const CXXRecordDecl *Base = |
| 920 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 921 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 922 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 923 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 924 | bool NonVirtualPrimaryBase; |
| 925 | NonVirtualPrimaryBase = !PrimaryBaseWasVirtual && Base == PrimaryBase; |
| 926 | bool BaseMorallyVirtual = MorallyVirtual | i->isVirtual(); |
Mike Stump | aee8de3 | 2009-11-11 03:08:24 +0000 | [diff] [blame] | 927 | uint64_t BaseOffset; |
| 928 | if (!i->isVirtual()) { |
| 929 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 930 | BaseOffset = Offset + Layout.getBaseClassOffset(Base); |
| 931 | } else |
| 932 | BaseOffset = BLayout.getVBaseClassOffset(Base); |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 933 | llvm::Constant *subvtbl = vtbl; |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 934 | const CXXRecordDecl *subVtblClass = VtblClass; |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 935 | if ((Base->getNumVBases() || BaseMorallyVirtual) |
| 936 | && !NonVirtualPrimaryBase) { |
| 937 | // FIXME: Slightly too many of these for __ZTT8test8_B2 |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 938 | llvm::Constant *init; |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 939 | if (BaseMorallyVirtual) |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 940 | init = BuildVtablePtr(vtbl, VtblClass, RD, Offset); |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 941 | else { |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 942 | init = CGM.getVtableInfo().getCtorVtable(Class, Base, BaseOffset); |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 943 | subvtbl = dyn_cast<llvm::Constant>(init->getOperand(0)); |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 944 | subVtblClass = Base; |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 945 | } |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 946 | Inits.push_back(init); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 947 | } |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 948 | Secondary(Base, subvtbl, subVtblClass, BaseOffset, BaseMorallyVirtual); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 949 | } |
| 950 | } |
| 951 | |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 952 | /// BuiltVTT - Add the VTT to Inits. Offset is the offset in bits to the |
| 953 | /// currnet object we're working on. |
| 954 | void BuildVTT(const CXXRecordDecl *RD, uint64_t Offset, bool MorallyVirtual) { |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 955 | if (RD->getNumVBases() == 0 && !MorallyVirtual) |
| 956 | return; |
| 957 | |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 958 | llvm::Constant *init; |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 959 | const CXXRecordDecl *VtblClass; |
| 960 | |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 961 | // First comes the primary virtual table pointer... |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 962 | if (MorallyVirtual) { |
| 963 | init = BuildVtablePtr(ClassVtbl, Class, RD, Offset); |
| 964 | VtblClass = Class; |
| 965 | } else { |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 966 | init = CGM.getVtableInfo().getCtorVtable(Class, RD, Offset); |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 967 | VtblClass = RD; |
| 968 | } |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 969 | llvm::Constant *vtbl = dyn_cast<llvm::Constant>(init->getOperand(0)); |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 970 | Inits.push_back(init); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 971 | |
| 972 | // then the secondary VTTs.... |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 973 | SecondaryVTTs(RD, Offset, MorallyVirtual); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 974 | |
| 975 | // and last the secondary vtable pointers. |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 976 | Secondary(RD, vtbl, VtblClass, Offset, MorallyVirtual); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 977 | } |
| 978 | |
| 979 | /// SecondaryVTTs - Add the secondary VTTs to Inits. The secondary VTTs are |
| 980 | /// built from each direct non-virtual proper base that requires a VTT in |
| 981 | /// declaration order. |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 982 | void SecondaryVTTs(const CXXRecordDecl *RD, uint64_t Offset=0, |
| 983 | bool MorallyVirtual=false) { |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 984 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 985 | e = RD->bases_end(); i != e; ++i) { |
| 986 | const CXXRecordDecl *Base = |
| 987 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 988 | if (i->isVirtual()) |
| 989 | continue; |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 990 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 991 | uint64_t BaseOffset = Offset + Layout.getBaseClassOffset(Base); |
| 992 | BuildVTT(Base, BaseOffset, MorallyVirtual); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 993 | } |
| 994 | } |
| 995 | |
| 996 | /// VirtualVTTs - Add the VTT for each proper virtual base in inheritance |
| 997 | /// graph preorder. |
| 998 | void VirtualVTTs(const CXXRecordDecl *RD) { |
| 999 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 1000 | e = RD->bases_end(); i != e; ++i) { |
| 1001 | const CXXRecordDecl *Base = |
| 1002 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 1003 | if (i->isVirtual() && !SeenVBase.count(Base)) { |
| 1004 | SeenVBase.insert(Base); |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1005 | uint64_t BaseOffset = BLayout.getVBaseClassOffset(Base); |
| 1006 | BuildVTT(Base, BaseOffset, true); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 1007 | } |
| 1008 | VirtualVTTs(Base); |
| 1009 | } |
| 1010 | } |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1011 | public: |
| 1012 | VTTBuilder(std::vector<llvm::Constant *> &inits, const CXXRecordDecl *c, |
Mike Stump | aee8de3 | 2009-11-11 03:08:24 +0000 | [diff] [blame] | 1013 | CodeGenModule &cgm) |
| 1014 | : Inits(inits), Class(c), CGM(cgm), |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1015 | BLayout(cgm.getContext().getASTRecordLayout(c)), |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 1016 | AddressPoints(*cgm.AddressPoints[c]), |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1017 | VMContext(cgm.getModule().getContext()) { |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 1018 | |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 1019 | // First comes the primary virtual table pointer for the complete class... |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1020 | ClassVtbl = CGM.getVtableInfo().getVtable(Class); |
| 1021 | Inits.push_back(ClassVtbl); |
| 1022 | ClassVtbl = dyn_cast<llvm::Constant>(ClassVtbl->getOperand(0)); |
| 1023 | |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 1024 | // then the secondary VTTs... |
| 1025 | SecondaryVTTs(Class); |
| 1026 | |
| 1027 | // then the secondary vtable pointers... |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 1028 | Secondary(Class, ClassVtbl, Class); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 1029 | |
| 1030 | // and last, the virtual VTTs. |
| 1031 | VirtualVTTs(Class); |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1032 | } |
| 1033 | }; |
| 1034 | |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 1035 | llvm::Constant *CodeGenModule::GenerateVTT(const CXXRecordDecl *RD) { |
Mike Stump | f1c0333 | 2009-11-10 19:13:04 +0000 | [diff] [blame] | 1036 | // Only classes that have virtual bases need a VTT. |
| 1037 | if (RD->getNumVBases() == 0) |
| 1038 | return 0; |
| 1039 | |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1040 | llvm::SmallString<256> OutName; |
Daniel Dunbar | 94fd26d | 2009-11-21 09:06:22 +0000 | [diff] [blame] | 1041 | getMangleContext().mangleCXXVTT(RD, OutName); |
| 1042 | llvm::StringRef Name = OutName.str(); |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1043 | |
| 1044 | llvm::GlobalVariable::LinkageTypes linktype; |
| 1045 | linktype = llvm::GlobalValue::LinkOnceODRLinkage; |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 1046 | if (RD->isInAnonymousNamespace()) |
| 1047 | linktype = llvm::GlobalValue::InternalLinkage; |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1048 | std::vector<llvm::Constant *> inits; |
| 1049 | llvm::Type *Ptr8Ty=llvm::PointerType::get(llvm::Type::getInt8Ty(VMContext),0); |
| 1050 | |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1051 | D1(printf("vtt %s\n", RD->getNameAsCString())); |
| 1052 | |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 1053 | VTTBuilder b(inits, RD, *this); |
| 1054 | |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1055 | llvm::Constant *C; |
| 1056 | llvm::ArrayType *type = llvm::ArrayType::get(Ptr8Ty, inits.size()); |
| 1057 | C = llvm::ConstantArray::get(type, inits); |
Mike Stump | e56ceca | 2009-11-18 04:00:48 +0000 | [diff] [blame] | 1058 | llvm::GlobalVariable *vtt = new llvm::GlobalVariable(getModule(), type, true, |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 1059 | linktype, C, Name); |
Mike Stump | e56ceca | 2009-11-18 04:00:48 +0000 | [diff] [blame] | 1060 | bool Hidden = getDeclVisibilityMode(RD) == LangOptions::Hidden; |
| 1061 | if (Hidden) |
| 1062 | vtt->setVisibility(llvm::GlobalVariable::HiddenVisibility); |
| 1063 | return llvm::ConstantExpr::getBitCast(vtt, Ptr8Ty); |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1064 | } |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 1065 | |
Mike Stump | 5858894 | 2009-11-19 01:08:19 +0000 | [diff] [blame] | 1066 | void CGVtableInfo::GenerateClassData(const CXXRecordDecl *RD) { |
| 1067 | Vtables[RD] = CGM.GenerateVtable(RD, RD); |
| 1068 | CGM.GenerateRtti(RD); |
| 1069 | CGM.GenerateVTT(RD); |
| 1070 | } |
| 1071 | |
Mike Stump | 8cfcb52 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 1072 | llvm::Constant *CGVtableInfo::getVtable(const CXXRecordDecl *RD) { |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 1073 | llvm::Constant *&vtbl = Vtables[RD]; |
| 1074 | if (vtbl) |
| 1075 | return vtbl; |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1076 | vtbl = CGM.GenerateVtable(RD, RD); |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 1077 | |
| 1078 | bool CreateDefinition = true; |
| 1079 | // We have to convert it to have a record layout. |
| 1080 | CGM.getTypes().ConvertTagDeclType(RD); |
| 1081 | const CGRecordLayout &CGLayout = CGM.getTypes().getCGRecordLayout(RD); |
| 1082 | if (const CXXMethodDecl *KeyFunction = CGLayout.getKeyFunction()) { |
| 1083 | if (!KeyFunction->getBody()) { |
| 1084 | // If there is a KeyFunction, and it isn't defined, just build a |
| 1085 | // reference to the vtable. |
| 1086 | CreateDefinition = false; |
| 1087 | } |
| 1088 | } |
| 1089 | |
| 1090 | if (CreateDefinition) { |
| 1091 | CGM.GenerateRtti(RD); |
| 1092 | CGM.GenerateVTT(RD); |
| 1093 | } |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 1094 | return vtbl; |
| 1095 | } |
Mike Stump | 8cfcb52 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 1096 | |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1097 | llvm::Constant *CGVtableInfo::getCtorVtable(const CXXRecordDecl *LayoutClass, |
| 1098 | const CXXRecordDecl *RD, |
Mike Stump | 8cfcb52 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 1099 | uint64_t Offset) { |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1100 | return CGM.GenerateVtable(LayoutClass, RD, Offset); |
Mike Stump | 8cfcb52 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 1101 | } |