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; |
Anders Carlsson | a94822e | 2009-11-26 02:32:05 +0000 | [diff] [blame] | 336 | submethods[idx] = CGM.BuildThunk(MD, Extern, |
| 337 | ThunkAdjustment(nv_O, v_O)); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 338 | } |
| 339 | Thunks.clear(); |
| 340 | for (CovariantThunks_t::iterator i = CovariantThunks.begin(), |
| 341 | e = CovariantThunks.end(); |
| 342 | i != e; ++i) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 343 | GlobalDecl GD = i->first; |
| 344 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); |
Mike Stump | 7809e0d | 2009-10-28 00:35:46 +0000 | [diff] [blame] | 345 | if (MD->isPure()) |
| 346 | continue; |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 347 | Index_t idx = Index[GD]; |
Mike Stump | d9878a1 | 2009-10-13 10:55:21 +0000 | [diff] [blame] | 348 | Index_t nv_t = i->second.first.first.first; |
| 349 | Index_t v_t = i->second.first.first.second; |
| 350 | Index_t nv_r = i->second.first.second.first; |
| 351 | Index_t v_r = i->second.first.second.second; |
Anders Carlsson | 7622cd3 | 2009-11-26 03:09:37 +0000 | [diff] [blame^] | 352 | |
| 353 | CovariantThunkAdjustment Adjustment(ThunkAdjustment(nv_t, v_t), |
| 354 | ThunkAdjustment(nv_r, v_r)); |
| 355 | submethods[idx] = CGM.BuildCovariantThunk(MD, Extern, Adjustment); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 356 | } |
| 357 | CovariantThunks.clear(); |
Mike Stump | 94aff93 | 2009-10-27 23:46:47 +0000 | [diff] [blame] | 358 | for (Pures_t::iterator i = Pures.begin(), e = Pures.end(); |
| 359 | i != e; ++i) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 360 | GlobalDecl GD = i->first; |
| 361 | Index_t idx = Index[GD]; |
Mike Stump | 94aff93 | 2009-10-27 23:46:47 +0000 | [diff] [blame] | 362 | submethods[idx] = cxa_pure; |
| 363 | } |
| 364 | Pures.clear(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 365 | } |
| 366 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 367 | llvm::Constant *WrapAddrOf(GlobalDecl GD) { |
| 368 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); |
| 369 | |
Mike Stump | 1ae3178 | 2009-10-27 23:36:26 +0000 | [diff] [blame] | 370 | if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(MD)) |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 371 | return wrap(CGM.GetAddrOfCXXDestructor(Dtor, GD.getDtorType())); |
Mike Stump | 1ae3178 | 2009-10-27 23:36:26 +0000 | [diff] [blame] | 372 | |
Anders Carlsson | ecf282b | 2009-11-24 05:08:52 +0000 | [diff] [blame] | 373 | const llvm::Type *Ty = CGM.getTypes().GetFunctionTypeForVtable(MD); |
Mike Stump | 1ae3178 | 2009-10-27 23:36:26 +0000 | [diff] [blame] | 374 | |
| 375 | return wrap(CGM.GetAddrOfFunction(MD, Ty)); |
| 376 | } |
| 377 | |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 378 | void OverrideMethods(Path_t *Path, bool MorallyVirtual, int64_t Offset, |
| 379 | int64_t CurrentVBaseOffset) { |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 380 | for (Path_t::reverse_iterator i = Path->rbegin(), |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 381 | e = Path->rend(); i != e; ++i) { |
| 382 | const CXXRecordDecl *RD = i->first; |
Mike Stump | 3425b97 | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 383 | int64_t OverrideOffset = i->second; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 384 | for (method_iter mi = RD->method_begin(), me = RD->method_end(); mi != me; |
| 385 | ++mi) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 386 | const CXXMethodDecl *MD = *mi; |
| 387 | |
| 388 | if (!MD->isVirtual()) |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 389 | continue; |
| 390 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 391 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(MD)) { |
| 392 | // Override both the complete and the deleting destructor. |
| 393 | GlobalDecl CompDtor(DD, Dtor_Complete); |
| 394 | OverrideMethod(CompDtor, WrapAddrOf(CompDtor), MorallyVirtual, |
| 395 | OverrideOffset, Offset, CurrentVBaseOffset); |
| 396 | |
| 397 | GlobalDecl DeletingDtor(DD, Dtor_Deleting); |
| 398 | OverrideMethod(DeletingDtor, WrapAddrOf(DeletingDtor), MorallyVirtual, |
| 399 | OverrideOffset, Offset, CurrentVBaseOffset); |
| 400 | } else { |
| 401 | OverrideMethod(MD, WrapAddrOf(MD), MorallyVirtual, OverrideOffset, |
| 402 | Offset, CurrentVBaseOffset); |
| 403 | } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 404 | } |
| 405 | } |
| 406 | } |
| 407 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 408 | void AddMethod(const GlobalDecl GD, bool MorallyVirtual, Index_t Offset, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 409 | bool ForVirtualBase, int64_t CurrentVBaseOffset) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 410 | llvm::Constant *m = WrapAddrOf(GD); |
Mike Stump | 1ae3178 | 2009-10-27 23:36:26 +0000 | [diff] [blame] | 411 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 412 | // If we can find a previously allocated slot for this, reuse it. |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 413 | if (OverrideMethod(GD, m, MorallyVirtual, Offset, Offset, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 414 | CurrentVBaseOffset)) |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 415 | return; |
| 416 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 417 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); |
| 418 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 419 | // else allocate a new slot. |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 420 | Index[GD] = submethods.size(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 421 | submethods.push_back(m); |
Mike Stump | e99cc45 | 2009-11-13 23:45:53 +0000 | [diff] [blame] | 422 | D1(printf(" vfn for %s at %d\n", MD->getNameAsString().c_str(), |
| 423 | (int)Index[GD])); |
Mike Stump | 7809e0d | 2009-10-28 00:35:46 +0000 | [diff] [blame] | 424 | if (MD->isPure()) |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 425 | Pures[GD] = 1; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 426 | if (MorallyVirtual) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 427 | VCallOffset[GD] = Offset/8; |
| 428 | Index_t &idx = VCall[GD]; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 429 | // Allocate the first one, after that, we reuse the previous one. |
| 430 | if (idx == 0) { |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 431 | NonVirtualOffset[GD] = CurrentVBaseOffset/8 - Offset/8; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 432 | idx = VCalls.size()+1; |
| 433 | VCalls.push_back(0); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 434 | D1(printf(" vcall for %s at %d with delta %d\n", |
Mike Stump | e99cc45 | 2009-11-13 23:45:53 +0000 | [diff] [blame] | 435 | MD->getNameAsString().c_str(), (int)-VCalls.size()-3, 0)); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 436 | } |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | void AddMethods(const CXXRecordDecl *RD, bool MorallyVirtual, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 441 | Index_t Offset, bool RDisVirtualBase, |
| 442 | int64_t CurrentVBaseOffset) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 443 | 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] | 444 | ++mi) { |
| 445 | const CXXMethodDecl *MD = *mi; |
| 446 | if (!MD->isVirtual()) |
| 447 | continue; |
| 448 | |
| 449 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(MD)) { |
| 450 | // For destructors, add both the complete and the deleting destructor |
| 451 | // to the vtable. |
| 452 | AddMethod(GlobalDecl(DD, Dtor_Complete), MorallyVirtual, Offset, |
| 453 | RDisVirtualBase, CurrentVBaseOffset); |
| 454 | AddMethod(GlobalDecl(DD, Dtor_Deleting), MorallyVirtual, Offset, |
| 455 | RDisVirtualBase, CurrentVBaseOffset); |
| 456 | } else |
| 457 | AddMethod(MD, MorallyVirtual, Offset, RDisVirtualBase, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 458 | CurrentVBaseOffset); |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 459 | } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 460 | } |
| 461 | |
| 462 | void NonVirtualBases(const CXXRecordDecl *RD, const ASTRecordLayout &Layout, |
| 463 | const CXXRecordDecl *PrimaryBase, |
| 464 | bool PrimaryBaseWasVirtual, bool MorallyVirtual, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 465 | int64_t Offset, int64_t CurrentVBaseOffset, |
| 466 | Path_t *Path) { |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 467 | Path->push_back(std::make_pair(RD, Offset)); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 468 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 469 | e = RD->bases_end(); i != e; ++i) { |
| 470 | if (i->isVirtual()) |
| 471 | continue; |
| 472 | const CXXRecordDecl *Base = |
| 473 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 474 | if (Base != PrimaryBase || PrimaryBaseWasVirtual) { |
| 475 | uint64_t o = Offset + Layout.getBaseClassOffset(Base); |
| 476 | StartNewTable(); |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 477 | GenerateVtableForBase(Base, o, MorallyVirtual, false, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 478 | CurrentVBaseOffset, Path); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 479 | } |
| 480 | } |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 481 | Path->pop_back(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 482 | } |
| 483 | |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 484 | // #define D(X) do { X; } while (0) |
| 485 | #define D(X) |
| 486 | |
| 487 | void insertVCalls(int InsertionPoint) { |
| 488 | llvm::Constant *e = 0; |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 489 | D1(printf("============= combining vbase/vcall\n")); |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 490 | D(VCalls.insert(VCalls.begin(), 673)); |
| 491 | D(VCalls.push_back(672)); |
Mike Stump | 3425b97 | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 492 | methods.insert(methods.begin() + InsertionPoint, VCalls.size(), e); |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 493 | // The vcalls come first... |
| 494 | for (std::vector<Index_t>::reverse_iterator i = VCalls.rbegin(), |
| 495 | e = VCalls.rend(); |
| 496 | i != e; ++i) |
| 497 | methods[InsertionPoint++] = wrap((0?600:0) + *i); |
| 498 | VCalls.clear(); |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 499 | VCall.clear(); |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 500 | } |
| 501 | |
Mike Stump | 65d0e28 | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 502 | void AddAddressPoints(const CXXRecordDecl *RD, uint64_t Offset, |
| 503 | Index_t AddressPoint) { |
| 504 | D1(printf("XXX address point for %s in %s layout %s at offset %d is %d\n", |
| 505 | RD->getNameAsCString(), Class->getNameAsCString(), |
| 506 | LayoutClass->getNameAsCString(), (int)Offset, (int)AddressPoint)); |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 507 | subAddressPoints[std::make_pair(RD, Offset)] = AddressPoint; |
Mike Stump | 65d0e28 | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 508 | |
| 509 | // Now also add the address point for all our primary bases. |
| 510 | while (1) { |
| 511 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 512 | RD = Layout.getPrimaryBase(); |
| 513 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 514 | // FIXME: Double check this. |
| 515 | if (RD == 0) |
| 516 | break; |
| 517 | if (PrimaryBaseWasVirtual && |
| 518 | BLayout.getVBaseClassOffset(RD) != Offset) |
| 519 | break; |
| 520 | D1(printf("XXX address point for %s in %s layout %s at offset %d is %d\n", |
| 521 | RD->getNameAsCString(), Class->getNameAsCString(), |
| 522 | LayoutClass->getNameAsCString(), (int)Offset, (int)AddressPoint)); |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 523 | subAddressPoints[std::make_pair(RD, Offset)] = AddressPoint; |
Mike Stump | 65d0e28 | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 524 | } |
| 525 | } |
| 526 | |
| 527 | |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 528 | Index_t end(const CXXRecordDecl *RD, const ASTRecordLayout &Layout, |
| 529 | const CXXRecordDecl *PrimaryBase, bool PrimaryBaseWasVirtual, |
| 530 | bool MorallyVirtual, int64_t Offset, bool ForVirtualBase, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 531 | int64_t CurrentVBaseOffset, |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 532 | Path_t *Path) { |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 533 | bool alloc = false; |
| 534 | if (Path == 0) { |
| 535 | alloc = true; |
| 536 | Path = new Path_t; |
| 537 | } |
| 538 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 539 | StartNewTable(); |
| 540 | extra = 0; |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 541 | bool DeferVCalls = MorallyVirtual || ForVirtualBase; |
| 542 | int VCallInsertionPoint = methods.size(); |
| 543 | if (!DeferVCalls) { |
| 544 | insertVCalls(VCallInsertionPoint); |
Mike Stump | 3425b97 | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 545 | } else |
| 546 | // FIXME: just for extra, or for all uses of VCalls.size post this? |
| 547 | extra = -VCalls.size(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 548 | |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 549 | methods.push_back(wrap(-((Offset-LayoutOffset)/8))); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 550 | methods.push_back(rtti); |
| 551 | Index_t AddressPoint = methods.size(); |
| 552 | |
| 553 | InstallThunks(); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 554 | D1(printf("============= combining methods\n")); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 555 | methods.insert(methods.end(), submethods.begin(), submethods.end()); |
| 556 | submethods.clear(); |
| 557 | |
| 558 | // and then the non-virtual bases. |
| 559 | NonVirtualBases(RD, Layout, PrimaryBase, PrimaryBaseWasVirtual, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 560 | MorallyVirtual, Offset, CurrentVBaseOffset, Path); |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 561 | |
| 562 | if (ForVirtualBase) { |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 563 | // FIXME: We're adding to VCalls in callers, we need to do the overrides |
| 564 | // in the inner part, so that we know the complete set of vcalls during |
| 565 | // the build and don't have to insert into methods. Saving out the |
| 566 | // AddressPoint here, would need to be fixed, if we didn't do that. Also |
| 567 | // retroactively adding vcalls for overrides later wind up in the wrong |
| 568 | // place, the vcall slot has to be alloted during the walk of the base |
| 569 | // when the function is first introduces. |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 570 | AddressPoint += VCalls.size(); |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 571 | insertVCalls(VCallInsertionPoint); |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 572 | } |
| 573 | |
Mike Stump | 65d0e28 | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 574 | AddAddressPoints(RD, Offset, AddressPoint); |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 575 | |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 576 | if (alloc) { |
| 577 | delete Path; |
| 578 | } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 579 | return AddressPoint; |
| 580 | } |
| 581 | |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 582 | void Primaries(const CXXRecordDecl *RD, bool MorallyVirtual, int64_t Offset, |
| 583 | bool updateVBIndex, Index_t current_vbindex, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 584 | bool RDisVirtualBase, int64_t CurrentVBaseOffset) { |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 585 | if (!RD->isDynamicClass()) |
| 586 | return; |
| 587 | |
| 588 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 589 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 590 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 591 | |
| 592 | // vtables are composed from the chain of primaries. |
| 593 | if (PrimaryBase) { |
| 594 | D1(printf(" doing primaries for %s most derived %s\n", |
| 595 | RD->getNameAsCString(), Class->getNameAsCString())); |
| 596 | |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 597 | int BaseCurrentVBaseOffset = CurrentVBaseOffset; |
| 598 | if (PrimaryBaseWasVirtual) |
| 599 | BaseCurrentVBaseOffset = BLayout.getVBaseClassOffset(PrimaryBase); |
| 600 | |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 601 | if (!PrimaryBaseWasVirtual) |
| 602 | Primaries(PrimaryBase, PrimaryBaseWasVirtual|MorallyVirtual, Offset, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 603 | updateVBIndex, current_vbindex, PrimaryBaseWasVirtual, |
| 604 | BaseCurrentVBaseOffset); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 605 | } |
| 606 | |
| 607 | D1(printf(" doing vcall entries for %s most derived %s\n", |
| 608 | RD->getNameAsCString(), Class->getNameAsCString())); |
| 609 | |
| 610 | // And add the virtuals for the class to the primary vtable. |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 611 | AddMethods(RD, MorallyVirtual, Offset, RDisVirtualBase, CurrentVBaseOffset); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 612 | } |
| 613 | |
| 614 | void VBPrimaries(const CXXRecordDecl *RD, bool MorallyVirtual, int64_t Offset, |
| 615 | bool updateVBIndex, Index_t current_vbindex, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 616 | bool RDisVirtualBase, int64_t CurrentVBaseOffset, |
| 617 | bool bottom=false) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 618 | if (!RD->isDynamicClass()) |
| 619 | return; |
| 620 | |
| 621 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 622 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 623 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 624 | |
| 625 | // vtables are composed from the chain of primaries. |
| 626 | if (PrimaryBase) { |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 627 | int BaseCurrentVBaseOffset = CurrentVBaseOffset; |
| 628 | if (PrimaryBaseWasVirtual) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 629 | IndirectPrimary.insert(PrimaryBase); |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 630 | BaseCurrentVBaseOffset = BLayout.getVBaseClassOffset(PrimaryBase); |
| 631 | } |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 632 | |
| 633 | D1(printf(" doing primaries for %s most derived %s\n", |
| 634 | RD->getNameAsCString(), Class->getNameAsCString())); |
| 635 | |
| 636 | VBPrimaries(PrimaryBase, PrimaryBaseWasVirtual|MorallyVirtual, Offset, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 637 | updateVBIndex, current_vbindex, PrimaryBaseWasVirtual, |
| 638 | BaseCurrentVBaseOffset); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 639 | } |
| 640 | |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 641 | D1(printf(" doing vbase entries for %s most derived %s\n", |
| 642 | RD->getNameAsCString(), Class->getNameAsCString())); |
| 643 | GenerateVBaseOffsets(RD, Offset, updateVBIndex, current_vbindex); |
| 644 | |
| 645 | if (RDisVirtualBase || bottom) { |
| 646 | Primaries(RD, MorallyVirtual, Offset, updateVBIndex, current_vbindex, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 647 | RDisVirtualBase, CurrentVBaseOffset); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 648 | } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 649 | } |
| 650 | |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 651 | int64_t GenerateVtableForBase(const CXXRecordDecl *RD, int64_t Offset = 0, |
| 652 | bool MorallyVirtual = false, |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 653 | bool ForVirtualBase = false, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 654 | int CurrentVBaseOffset = 0, |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 655 | Path_t *Path = 0) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 656 | if (!RD->isDynamicClass()) |
| 657 | return 0; |
| 658 | |
Mike Stump | 92774d1 | 2009-11-13 02:35:38 +0000 | [diff] [blame] | 659 | // Construction vtable don't need parts that have no virtual bases and |
| 660 | // aren't morally virtual. |
| 661 | if ((LayoutClass != Class) && RD->getNumVBases() == 0 && !MorallyVirtual) |
| 662 | return 0; |
| 663 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 664 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 665 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 666 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 667 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 668 | extra = 0; |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 669 | D1(printf("building entries for base %s most derived %s\n", |
| 670 | RD->getNameAsCString(), Class->getNameAsCString())); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 671 | |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 672 | if (ForVirtualBase) |
| 673 | extra = VCalls.size(); |
| 674 | |
| 675 | VBPrimaries(RD, MorallyVirtual, Offset, !ForVirtualBase, 0, ForVirtualBase, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 676 | CurrentVBaseOffset, true); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 677 | |
| 678 | if (Path) |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 679 | OverrideMethods(Path, MorallyVirtual, Offset, CurrentVBaseOffset); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 680 | |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 681 | return end(RD, Layout, PrimaryBase, PrimaryBaseWasVirtual, MorallyVirtual, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 682 | Offset, ForVirtualBase, CurrentVBaseOffset, Path); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 683 | } |
| 684 | |
| 685 | void GenerateVtableForVBases(const CXXRecordDecl *RD, |
| 686 | int64_t Offset = 0, |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 687 | Path_t *Path = 0) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 688 | bool alloc = false; |
| 689 | if (Path == 0) { |
| 690 | alloc = true; |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 691 | Path = new Path_t; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 692 | } |
| 693 | // FIXME: We also need to override using all paths to a virtual base, |
| 694 | // right now, we just process the first path |
| 695 | Path->push_back(std::make_pair(RD, Offset)); |
| 696 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 697 | e = RD->bases_end(); i != e; ++i) { |
| 698 | const CXXRecordDecl *Base = |
| 699 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 700 | if (i->isVirtual() && !IndirectPrimary.count(Base)) { |
| 701 | // Mark it so we don't output it twice. |
| 702 | IndirectPrimary.insert(Base); |
| 703 | StartNewTable(); |
Mike Stump | 0ca4279 | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 704 | VCall.clear(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 705 | int64_t BaseOffset = BLayout.getVBaseClassOffset(Base); |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 706 | int64_t CurrentVBaseOffset = BaseOffset; |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 707 | D1(printf("vtable %s virtual base %s\n", |
| 708 | Class->getNameAsCString(), Base->getNameAsCString())); |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 709 | GenerateVtableForBase(Base, BaseOffset, true, true, CurrentVBaseOffset, |
Mike Stump | 9e7e3c6 | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 710 | Path); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 711 | } |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 712 | int64_t BaseOffset; |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 713 | if (i->isVirtual()) |
| 714 | BaseOffset = BLayout.getVBaseClassOffset(Base); |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 715 | else { |
| 716 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 717 | BaseOffset = Offset + Layout.getBaseClassOffset(Base); |
| 718 | } |
| 719 | |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 720 | if (Base->getNumVBases()) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 721 | GenerateVtableForVBases(Base, BaseOffset, Path); |
Mike Stump | 11dea94 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 722 | } |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 723 | } |
| 724 | Path->pop_back(); |
| 725 | if (alloc) |
| 726 | delete Path; |
| 727 | } |
| 728 | }; |
| 729 | |
| 730 | |
| 731 | VtableBuilder::Index_t VtableBuilder::VBlookup(CXXRecordDecl *D, |
| 732 | CXXRecordDecl *B) { |
| 733 | return CGM.getVtableInfo().getVirtualBaseOffsetIndex(D, B); |
| 734 | } |
| 735 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 736 | int64_t CGVtableInfo::getMethodVtableIndex(GlobalDecl GD) { |
| 737 | MethodVtableIndicesTy::iterator I = MethodVtableIndices.find(GD); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 738 | if (I != MethodVtableIndices.end()) |
| 739 | return I->second; |
| 740 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 741 | const CXXRecordDecl *RD = cast<CXXMethodDecl>(GD.getDecl())->getParent(); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 742 | |
| 743 | std::vector<llvm::Constant *> methods; |
| 744 | // FIXME: This seems expensive. Can we do a partial job to get |
| 745 | // just this data. |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 746 | VtableBuilder b(methods, RD, RD, 0, CGM); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 747 | D1(printf("vtable %s\n", RD->getNameAsCString())); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 748 | b.GenerateVtableForBase(RD); |
| 749 | b.GenerateVtableForVBases(RD); |
| 750 | |
| 751 | MethodVtableIndices.insert(b.getIndex().begin(), |
| 752 | b.getIndex().end()); |
| 753 | |
Anders Carlsson | a0fdd91 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 754 | I = MethodVtableIndices.find(GD); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 755 | assert(I != MethodVtableIndices.end() && "Did not find index!"); |
| 756 | return I->second; |
| 757 | } |
| 758 | |
| 759 | int64_t CGVtableInfo::getVirtualBaseOffsetIndex(const CXXRecordDecl *RD, |
| 760 | const CXXRecordDecl *VBase) { |
| 761 | ClassPairTy ClassPair(RD, VBase); |
| 762 | |
| 763 | VirtualBaseClassIndiciesTy::iterator I = |
| 764 | VirtualBaseClassIndicies.find(ClassPair); |
| 765 | if (I != VirtualBaseClassIndicies.end()) |
| 766 | return I->second; |
| 767 | |
| 768 | std::vector<llvm::Constant *> methods; |
| 769 | // FIXME: This seems expensive. Can we do a partial job to get |
| 770 | // just this data. |
Mike Stump | 4cde626 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 771 | VtableBuilder b(methods, RD, RD, 0, CGM); |
Mike Stump | 6a9612f | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 772 | D1(printf("vtable %s\n", RD->getNameAsCString())); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 773 | b.GenerateVtableForBase(RD); |
| 774 | b.GenerateVtableForVBases(RD); |
| 775 | |
| 776 | for (llvm::DenseMap<const CXXRecordDecl *, uint64_t>::iterator I = |
| 777 | b.getVBIndex().begin(), E = b.getVBIndex().end(); I != E; ++I) { |
| 778 | // Insert all types. |
| 779 | ClassPairTy ClassPair(RD, I->first); |
| 780 | |
| 781 | VirtualBaseClassIndicies.insert(std::make_pair(ClassPair, I->second)); |
| 782 | } |
| 783 | |
| 784 | I = VirtualBaseClassIndicies.find(ClassPair); |
| 785 | assert(I != VirtualBaseClassIndicies.end() && "Did not find index!"); |
| 786 | |
| 787 | return I->second; |
| 788 | } |
| 789 | |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 790 | llvm::Constant *CodeGenModule::GenerateVtable(const CXXRecordDecl *LayoutClass, |
| 791 | const CXXRecordDecl *RD, |
Mike Stump | 8cfcb52 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 792 | uint64_t Offset) { |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 793 | llvm::SmallString<256> OutName; |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 794 | if (LayoutClass != RD) |
Daniel Dunbar | 94fd26d | 2009-11-21 09:06:22 +0000 | [diff] [blame] | 795 | getMangleContext().mangleCXXCtorVtable(LayoutClass, Offset/8, RD, OutName); |
Mike Stump | 8cfcb52 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 796 | else |
Daniel Dunbar | 94fd26d | 2009-11-21 09:06:22 +0000 | [diff] [blame] | 797 | getMangleContext().mangleCXXVtable(RD, OutName); |
| 798 | llvm::StringRef Name = OutName.str(); |
Benjamin Kramer | 7a9474e | 2009-10-11 22:57:54 +0000 | [diff] [blame] | 799 | |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 800 | std::vector<llvm::Constant *> methods; |
| 801 | llvm::Type *Ptr8Ty=llvm::PointerType::get(llvm::Type::getInt8Ty(VMContext),0); |
| 802 | int64_t AddressPoint; |
| 803 | |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 804 | llvm::GlobalVariable *GV = getModule().getGlobalVariable(Name); |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 805 | if (GV && AddressPoints[LayoutClass] && !GV->isDeclaration()) { |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 806 | AddressPoint=(*(*(AddressPoints[LayoutClass]))[RD])[std::make_pair(RD, |
| 807 | Offset)]; |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 808 | // FIXME: We can never have 0 address point. Do this for now so gepping |
| 809 | // retains the same structure. Later, we'll just assert. |
| 810 | if (AddressPoint == 0) |
| 811 | AddressPoint = 1; |
| 812 | } else { |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 813 | VtableBuilder b(methods, RD, LayoutClass, Offset, *this); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 814 | |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 815 | D1(printf("vtable %s\n", RD->getNameAsCString())); |
| 816 | // First comes the vtables for all the non-virtual bases... |
| 817 | AddressPoint = b.GenerateVtableForBase(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 | // then the vtables for all the virtual bases. |
| 820 | b.GenerateVtableForVBases(RD, Offset); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 821 | |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 822 | bool CreateDefinition = true; |
| 823 | if (LayoutClass != RD) |
| 824 | CreateDefinition = true; |
| 825 | else { |
| 826 | // We have to convert it to have a record layout. |
| 827 | Types.ConvertTagDeclType(LayoutClass); |
| 828 | const CGRecordLayout &CGLayout = Types.getCGRecordLayout(LayoutClass); |
| 829 | if (const CXXMethodDecl *KeyFunction = CGLayout.getKeyFunction()) { |
| 830 | if (!KeyFunction->getBody()) { |
| 831 | // If there is a KeyFunction, and it isn't defined, just build a |
| 832 | // reference to the vtable. |
| 833 | CreateDefinition = false; |
| 834 | } |
| 835 | } |
| 836 | } |
| 837 | |
| 838 | llvm::Constant *C = 0; |
| 839 | llvm::Type *type = Ptr8Ty; |
| 840 | llvm::GlobalVariable::LinkageTypes linktype |
| 841 | = llvm::GlobalValue::ExternalLinkage; |
| 842 | if (CreateDefinition) { |
| 843 | llvm::ArrayType *ntype = llvm::ArrayType::get(Ptr8Ty, methods.size()); |
| 844 | C = llvm::ConstantArray::get(ntype, methods); |
| 845 | linktype = llvm::GlobalValue::LinkOnceODRLinkage; |
| 846 | if (LayoutClass->isInAnonymousNamespace()) |
| 847 | linktype = llvm::GlobalValue::InternalLinkage; |
| 848 | type = ntype; |
| 849 | } |
| 850 | llvm::GlobalVariable *OGV = GV; |
| 851 | GV = new llvm::GlobalVariable(getModule(), type, true, linktype, C, Name); |
| 852 | if (OGV) { |
| 853 | GV->takeName(OGV); |
| 854 | llvm::Constant *NewPtr = llvm::ConstantExpr::getBitCast(GV, |
| 855 | OGV->getType()); |
| 856 | OGV->replaceAllUsesWith(NewPtr); |
| 857 | OGV->eraseFromParent(); |
| 858 | } |
| 859 | bool Hidden = getDeclVisibilityMode(RD) == LangOptions::Hidden; |
| 860 | if (Hidden) |
| 861 | GV->setVisibility(llvm::GlobalVariable::HiddenVisibility); |
| 862 | } |
Mike Stump | e56ceca | 2009-11-18 04:00:48 +0000 | [diff] [blame] | 863 | llvm::Constant *vtable = llvm::ConstantExpr::getBitCast(GV, Ptr8Ty); |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 864 | llvm::Constant *AddressPointC; |
| 865 | uint32_t LLVMPointerWidth = getContext().Target.getPointerWidth(0); |
| 866 | AddressPointC = llvm::ConstantInt::get(llvm::Type::getInt64Ty(VMContext), |
| 867 | AddressPoint*LLVMPointerWidth/8); |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 868 | vtable = llvm::ConstantExpr::getInBoundsGetElementPtr(vtable, &AddressPointC, |
| 869 | 1); |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 870 | |
Mike Stump | 23a3542 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 871 | assert(vtable->getType() == Ptr8Ty); |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 872 | return vtable; |
| 873 | } |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 874 | |
| 875 | class VTTBuilder { |
| 876 | /// Inits - The list of values built for the VTT. |
| 877 | std::vector<llvm::Constant *> &Inits; |
| 878 | /// Class - The most derived class that this vtable is being built for. |
| 879 | const CXXRecordDecl *Class; |
| 880 | CodeGenModule &CGM; // Per-module state. |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 881 | llvm::SmallSet<const CXXRecordDecl *, 32> SeenVBase; |
Mike Stump | aee8de3 | 2009-11-11 03:08:24 +0000 | [diff] [blame] | 882 | /// BLayout - Layout for the most derived class that this vtable is being |
| 883 | /// built for. |
| 884 | const ASTRecordLayout &BLayout; |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 885 | CodeGenModule::AddrMap_t &AddressPoints; |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 886 | // vtbl - A pointer to the vtable for Class. |
| 887 | llvm::Constant *ClassVtbl; |
| 888 | llvm::LLVMContext &VMContext; |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 889 | |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 890 | /// BuildVtablePtr - Build up a referene to the given secondary vtable |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 891 | llvm::Constant *BuildVtablePtr(llvm::Constant *vtbl, |
| 892 | const CXXRecordDecl *VtblClass, |
| 893 | const CXXRecordDecl *RD, |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 894 | uint64_t Offset) { |
| 895 | int64_t AddressPoint; |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 896 | AddressPoint = (*AddressPoints[VtblClass])[std::make_pair(RD, Offset)]; |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 897 | // 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] | 898 | // retains the same structure. Later we'll just assert. |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 899 | if (AddressPoint == 0) |
| 900 | AddressPoint = 1; |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 901 | D1(printf("XXX address point for %s in %s layout %s at offset %d was %d\n", |
| 902 | RD->getNameAsCString(), VtblClass->getNameAsCString(), |
| 903 | Class->getNameAsCString(), (int)Offset, (int)AddressPoint)); |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 904 | uint32_t LLVMPointerWidth = CGM.getContext().Target.getPointerWidth(0); |
| 905 | llvm::Constant *init; |
| 906 | init = llvm::ConstantInt::get(llvm::Type::getInt64Ty(VMContext), |
| 907 | AddressPoint*LLVMPointerWidth/8); |
| 908 | init = llvm::ConstantExpr::getInBoundsGetElementPtr(vtbl, &init, 1); |
| 909 | return init; |
| 910 | } |
| 911 | |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 912 | /// Secondary - Add the secondary vtable pointers to Inits. Offset is the |
| 913 | /// current offset in bits to the object we're working on. |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 914 | void Secondary(const CXXRecordDecl *RD, llvm::Constant *vtbl, |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 915 | const CXXRecordDecl *VtblClass, uint64_t Offset=0, |
| 916 | bool MorallyVirtual=false) { |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 917 | if (RD->getNumVBases() == 0 && ! MorallyVirtual) |
| 918 | return; |
| 919 | |
| 920 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 921 | e = RD->bases_end(); i != e; ++i) { |
| 922 | const CXXRecordDecl *Base = |
| 923 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 924 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 925 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 926 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 927 | bool NonVirtualPrimaryBase; |
| 928 | NonVirtualPrimaryBase = !PrimaryBaseWasVirtual && Base == PrimaryBase; |
| 929 | bool BaseMorallyVirtual = MorallyVirtual | i->isVirtual(); |
Mike Stump | aee8de3 | 2009-11-11 03:08:24 +0000 | [diff] [blame] | 930 | uint64_t BaseOffset; |
| 931 | if (!i->isVirtual()) { |
| 932 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 933 | BaseOffset = Offset + Layout.getBaseClassOffset(Base); |
| 934 | } else |
| 935 | BaseOffset = BLayout.getVBaseClassOffset(Base); |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 936 | llvm::Constant *subvtbl = vtbl; |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 937 | const CXXRecordDecl *subVtblClass = VtblClass; |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 938 | if ((Base->getNumVBases() || BaseMorallyVirtual) |
| 939 | && !NonVirtualPrimaryBase) { |
| 940 | // FIXME: Slightly too many of these for __ZTT8test8_B2 |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 941 | llvm::Constant *init; |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 942 | if (BaseMorallyVirtual) |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 943 | init = BuildVtablePtr(vtbl, VtblClass, RD, Offset); |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 944 | else { |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 945 | init = CGM.getVtableInfo().getCtorVtable(Class, Base, BaseOffset); |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 946 | subvtbl = dyn_cast<llvm::Constant>(init->getOperand(0)); |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 947 | subVtblClass = Base; |
Mike Stump | 80ac235 | 2009-11-12 23:36:21 +0000 | [diff] [blame] | 948 | } |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 949 | Inits.push_back(init); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 950 | } |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 951 | Secondary(Base, subvtbl, subVtblClass, BaseOffset, BaseMorallyVirtual); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 952 | } |
| 953 | } |
| 954 | |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 955 | /// BuiltVTT - Add the VTT to Inits. Offset is the offset in bits to the |
| 956 | /// currnet object we're working on. |
| 957 | void BuildVTT(const CXXRecordDecl *RD, uint64_t Offset, bool MorallyVirtual) { |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 958 | if (RD->getNumVBases() == 0 && !MorallyVirtual) |
| 959 | return; |
| 960 | |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 961 | llvm::Constant *init; |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 962 | const CXXRecordDecl *VtblClass; |
| 963 | |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 964 | // First comes the primary virtual table pointer... |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 965 | if (MorallyVirtual) { |
| 966 | init = BuildVtablePtr(ClassVtbl, Class, RD, Offset); |
| 967 | VtblClass = Class; |
| 968 | } else { |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 969 | init = CGM.getVtableInfo().getCtorVtable(Class, RD, Offset); |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 970 | VtblClass = RD; |
| 971 | } |
Mike Stump | 28f7ce1 | 2009-11-12 22:56:32 +0000 | [diff] [blame] | 972 | llvm::Constant *vtbl = dyn_cast<llvm::Constant>(init->getOperand(0)); |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 973 | Inits.push_back(init); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 974 | |
| 975 | // then the secondary VTTs.... |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 976 | SecondaryVTTs(RD, Offset, MorallyVirtual); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 977 | |
| 978 | // and last the secondary vtable pointers. |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 979 | Secondary(RD, vtbl, VtblClass, Offset, MorallyVirtual); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 980 | } |
| 981 | |
| 982 | /// SecondaryVTTs - Add the secondary VTTs to Inits. The secondary VTTs are |
| 983 | /// built from each direct non-virtual proper base that requires a VTT in |
| 984 | /// declaration order. |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 985 | void SecondaryVTTs(const CXXRecordDecl *RD, uint64_t Offset=0, |
| 986 | bool MorallyVirtual=false) { |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 987 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 988 | e = RD->bases_end(); i != e; ++i) { |
| 989 | const CXXRecordDecl *Base = |
| 990 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 991 | if (i->isVirtual()) |
| 992 | continue; |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 993 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 994 | uint64_t BaseOffset = Offset + Layout.getBaseClassOffset(Base); |
| 995 | BuildVTT(Base, BaseOffset, MorallyVirtual); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 996 | } |
| 997 | } |
| 998 | |
| 999 | /// VirtualVTTs - Add the VTT for each proper virtual base in inheritance |
| 1000 | /// graph preorder. |
| 1001 | void VirtualVTTs(const CXXRecordDecl *RD) { |
| 1002 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 1003 | e = RD->bases_end(); i != e; ++i) { |
| 1004 | const CXXRecordDecl *Base = |
| 1005 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 1006 | if (i->isVirtual() && !SeenVBase.count(Base)) { |
| 1007 | SeenVBase.insert(Base); |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1008 | uint64_t BaseOffset = BLayout.getVBaseClassOffset(Base); |
| 1009 | BuildVTT(Base, BaseOffset, true); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 1010 | } |
| 1011 | VirtualVTTs(Base); |
| 1012 | } |
| 1013 | } |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1014 | public: |
| 1015 | VTTBuilder(std::vector<llvm::Constant *> &inits, const CXXRecordDecl *c, |
Mike Stump | aee8de3 | 2009-11-11 03:08:24 +0000 | [diff] [blame] | 1016 | CodeGenModule &cgm) |
| 1017 | : Inits(inits), Class(c), CGM(cgm), |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1018 | BLayout(cgm.getContext().getASTRecordLayout(c)), |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 1019 | AddressPoints(*cgm.AddressPoints[c]), |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1020 | VMContext(cgm.getModule().getContext()) { |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 1021 | |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 1022 | // First comes the primary virtual table pointer for the complete class... |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1023 | ClassVtbl = CGM.getVtableInfo().getVtable(Class); |
| 1024 | Inits.push_back(ClassVtbl); |
| 1025 | ClassVtbl = dyn_cast<llvm::Constant>(ClassVtbl->getOperand(0)); |
| 1026 | |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 1027 | // then the secondary VTTs... |
| 1028 | SecondaryVTTs(Class); |
| 1029 | |
| 1030 | // then the secondary vtable pointers... |
Mike Stump | acfd1e5 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 1031 | Secondary(Class, ClassVtbl, Class); |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 1032 | |
| 1033 | // and last, the virtual VTTs. |
| 1034 | VirtualVTTs(Class); |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1035 | } |
| 1036 | }; |
| 1037 | |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 1038 | llvm::Constant *CodeGenModule::GenerateVTT(const CXXRecordDecl *RD) { |
Mike Stump | f1c0333 | 2009-11-10 19:13:04 +0000 | [diff] [blame] | 1039 | // Only classes that have virtual bases need a VTT. |
| 1040 | if (RD->getNumVBases() == 0) |
| 1041 | return 0; |
| 1042 | |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1043 | llvm::SmallString<256> OutName; |
Daniel Dunbar | 94fd26d | 2009-11-21 09:06:22 +0000 | [diff] [blame] | 1044 | getMangleContext().mangleCXXVTT(RD, OutName); |
| 1045 | llvm::StringRef Name = OutName.str(); |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1046 | |
| 1047 | llvm::GlobalVariable::LinkageTypes linktype; |
| 1048 | linktype = llvm::GlobalValue::LinkOnceODRLinkage; |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 1049 | if (RD->isInAnonymousNamespace()) |
| 1050 | linktype = llvm::GlobalValue::InternalLinkage; |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1051 | std::vector<llvm::Constant *> inits; |
| 1052 | llvm::Type *Ptr8Ty=llvm::PointerType::get(llvm::Type::getInt8Ty(VMContext),0); |
| 1053 | |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1054 | D1(printf("vtt %s\n", RD->getNameAsCString())); |
| 1055 | |
Mike Stump | 971977f | 2009-11-11 00:35:07 +0000 | [diff] [blame] | 1056 | VTTBuilder b(inits, RD, *this); |
| 1057 | |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1058 | llvm::Constant *C; |
| 1059 | llvm::ArrayType *type = llvm::ArrayType::get(Ptr8Ty, inits.size()); |
| 1060 | C = llvm::ConstantArray::get(type, inits); |
Mike Stump | e56ceca | 2009-11-18 04:00:48 +0000 | [diff] [blame] | 1061 | llvm::GlobalVariable *vtt = new llvm::GlobalVariable(getModule(), type, true, |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 1062 | linktype, C, Name); |
Mike Stump | e56ceca | 2009-11-18 04:00:48 +0000 | [diff] [blame] | 1063 | bool Hidden = getDeclVisibilityMode(RD) == LangOptions::Hidden; |
| 1064 | if (Hidden) |
| 1065 | vtt->setVisibility(llvm::GlobalVariable::HiddenVisibility); |
| 1066 | return llvm::ConstantExpr::getBitCast(vtt, Ptr8Ty); |
Mike Stump | fbfb52d | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 1067 | } |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 1068 | |
Mike Stump | 5858894 | 2009-11-19 01:08:19 +0000 | [diff] [blame] | 1069 | void CGVtableInfo::GenerateClassData(const CXXRecordDecl *RD) { |
| 1070 | Vtables[RD] = CGM.GenerateVtable(RD, RD); |
| 1071 | CGM.GenerateRtti(RD); |
| 1072 | CGM.GenerateVTT(RD); |
| 1073 | } |
| 1074 | |
Mike Stump | 8cfcb52 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 1075 | llvm::Constant *CGVtableInfo::getVtable(const CXXRecordDecl *RD) { |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 1076 | llvm::Constant *&vtbl = Vtables[RD]; |
| 1077 | if (vtbl) |
| 1078 | return vtbl; |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1079 | vtbl = CGM.GenerateVtable(RD, RD); |
Mike Stump | 85615df | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 1080 | |
| 1081 | bool CreateDefinition = true; |
| 1082 | // We have to convert it to have a record layout. |
| 1083 | CGM.getTypes().ConvertTagDeclType(RD); |
| 1084 | const CGRecordLayout &CGLayout = CGM.getTypes().getCGRecordLayout(RD); |
| 1085 | if (const CXXMethodDecl *KeyFunction = CGLayout.getKeyFunction()) { |
| 1086 | if (!KeyFunction->getBody()) { |
| 1087 | // If there is a KeyFunction, and it isn't defined, just build a |
| 1088 | // reference to the vtable. |
| 1089 | CreateDefinition = false; |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | if (CreateDefinition) { |
| 1094 | CGM.GenerateRtti(RD); |
| 1095 | CGM.GenerateVTT(RD); |
| 1096 | } |
Mike Stump | 380dd75 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 1097 | return vtbl; |
| 1098 | } |
Mike Stump | 8cfcb52 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 1099 | |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1100 | llvm::Constant *CGVtableInfo::getCtorVtable(const CXXRecordDecl *LayoutClass, |
| 1101 | const CXXRecordDecl *RD, |
Mike Stump | 8cfcb52 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 1102 | uint64_t Offset) { |
Mike Stump | 9840c70 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 1103 | return CGM.GenerateVtable(LayoutClass, RD, Offset); |
Mike Stump | 8cfcb52 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 1104 | } |