Anders Carlsson | 2bb27f5 | 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" |
Anders Carlsson | f942ee0 | 2009-11-27 20:47:55 +0000 | [diff] [blame] | 16 | #include "clang/AST/CXXInheritance.h" |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 17 | #include "clang/AST/RecordLayout.h" |
Anders Carlsson | d420a31 | 2009-11-26 19:32:45 +0000 | [diff] [blame] | 18 | #include "llvm/ADT/DenseSet.h" |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 19 | #include "llvm/ADT/SetVector.h" |
Chandler Carruth | 94eab4a | 2010-02-13 10:38:52 +0000 | [diff] [blame] | 20 | #include "llvm/Support/Compiler.h" |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 21 | #include "llvm/Support/Format.h" |
Zhongxing Xu | 1721ef7 | 2009-11-13 05:46:16 +0000 | [diff] [blame] | 22 | #include <cstdio> |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 23 | |
| 24 | using namespace clang; |
| 25 | using namespace CodeGen; |
| 26 | |
Anders Carlsson | d5988502 | 2009-11-27 22:21:51 +0000 | [diff] [blame] | 27 | namespace { |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 28 | |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 29 | /// BaseOffset - Represents an offset from a derived class to a direct or |
| 30 | /// indirect base class. |
| 31 | struct BaseOffset { |
| 32 | /// DerivedClass - The derived class. |
| 33 | const CXXRecordDecl *DerivedClass; |
| 34 | |
| 35 | /// VirtualBase - If the path from the derived class to the base class |
| 36 | /// involves a virtual base class, this holds its declaration. |
| 37 | const CXXRecordDecl *VirtualBase; |
| 38 | |
| 39 | /// NonVirtualOffset - The offset from the derived class to the base class. |
| 40 | /// (Or the offset from the virtual base class to the base class, if the |
| 41 | /// path from the derived class to the base class involves a virtual base |
| 42 | /// class. |
| 43 | int64_t NonVirtualOffset; |
| 44 | |
| 45 | BaseOffset() : DerivedClass(0), VirtualBase(0), NonVirtualOffset(0) { } |
| 46 | BaseOffset(const CXXRecordDecl *DerivedClass, |
| 47 | const CXXRecordDecl *VirtualBase, int64_t NonVirtualOffset) |
| 48 | : DerivedClass(DerivedClass), VirtualBase(VirtualBase), |
| 49 | NonVirtualOffset(NonVirtualOffset) { } |
| 50 | |
| 51 | bool isEmpty() const { return !NonVirtualOffset && !VirtualBase; } |
| 52 | }; |
| 53 | |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 54 | /// FinalOverriders - Contains the final overrider member functions for all |
| 55 | /// member functions in the base subobjects of a class. |
| 56 | class FinalOverriders { |
Anders Carlsson | 136bd19 | 2010-02-12 16:55:34 +0000 | [diff] [blame] | 57 | public: |
| 58 | /// OverriderInfo - Information about a final overrider. |
| 59 | struct OverriderInfo { |
| 60 | /// Method - The method decl of the overrider. |
| 61 | const CXXMethodDecl *Method; |
Anders Carlsson | 5a7654a | 2010-02-18 16:29:24 +0000 | [diff] [blame] | 62 | |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 63 | /// Offset - the base offset of the overrider in the layout class. |
| 64 | uint64_t Offset; |
Anders Carlsson | 136bd19 | 2010-02-12 16:55:34 +0000 | [diff] [blame] | 65 | |
Anders Carlsson | 3c28967 | 2010-03-12 05:02:01 +0000 | [diff] [blame^] | 66 | OverriderInfo() : Method(0), Offset(0) { } |
Anders Carlsson | 136bd19 | 2010-02-12 16:55:34 +0000 | [diff] [blame] | 67 | }; |
| 68 | |
| 69 | private: |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 70 | /// MostDerivedClass - The most derived class for which the final overriders |
| 71 | /// are stored. |
| 72 | const CXXRecordDecl *MostDerivedClass; |
| 73 | |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 74 | /// MostDerivedClassOffset - If we're building final overriders for a |
| 75 | /// construction vtable, this holds the offset from the layout class to the |
| 76 | /// most derived class. |
| 77 | const uint64_t MostDerivedClassOffset; |
| 78 | |
| 79 | /// LayoutClass - The class we're using for layout information. Will be |
| 80 | /// different than the most derived class if the final overriders are for a |
| 81 | /// construction vtable. |
| 82 | const CXXRecordDecl *LayoutClass; |
| 83 | |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 84 | ASTContext &Context; |
| 85 | |
| 86 | /// MostDerivedClassLayout - the AST record layout of the most derived class. |
| 87 | const ASTRecordLayout &MostDerivedClassLayout; |
| 88 | |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 89 | /// BaseSubobjectMethodPairTy - Uniquely identifies a member function |
| 90 | /// in a base subobject. |
| 91 | typedef std::pair<BaseSubobject, const CXXMethodDecl *> |
| 92 | BaseSubobjectMethodPairTy; |
| 93 | |
| 94 | typedef llvm::DenseMap<BaseSubobjectMethodPairTy, |
Anders Carlsson | 136bd19 | 2010-02-12 16:55:34 +0000 | [diff] [blame] | 95 | OverriderInfo> OverridersMapTy; |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 96 | |
| 97 | /// OverridersMap - The final overriders for all virtual member functions of |
| 98 | /// all the base subobjects of the most derived class. |
| 99 | OverridersMapTy OverridersMap; |
| 100 | |
Anders Carlsson | 6a7e6a4 | 2010-02-14 00:37:35 +0000 | [diff] [blame] | 101 | /// VisitedVirtualBases - A set of all the visited virtual bases, used to |
| 102 | /// avoid visiting virtual bases more than once. |
| 103 | llvm::SmallPtrSet<const CXXRecordDecl *, 4> VisitedVirtualBases; |
| 104 | |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 105 | typedef llvm::DenseMap<BaseSubobjectMethodPairTy, BaseOffset> |
| 106 | AdjustmentOffsetsMapTy; |
| 107 | |
| 108 | /// ReturnAdjustments - Holds return adjustments for all the overriders that |
| 109 | /// need to perform return value adjustments. |
| 110 | AdjustmentOffsetsMapTy ReturnAdjustments; |
Anders Carlsson | cce9ee8 | 2010-02-13 23:17:31 +0000 | [diff] [blame] | 111 | |
Anders Carlsson | 5b0057c | 2010-03-03 04:58:02 +0000 | [diff] [blame] | 112 | // FIXME: We might be able to get away with making this a SmallSet. |
| 113 | typedef llvm::SmallSetVector<uint64_t, 2> OffsetSetVectorTy; |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 114 | |
| 115 | /// SubobjectOffsetsMapTy - This map is used for keeping track of all the |
| 116 | /// base subobject offsets that a single class declaration might refer to. |
| 117 | /// |
| 118 | /// For example, in: |
| 119 | /// |
| 120 | /// struct A { virtual void f(); }; |
| 121 | /// struct B1 : A { }; |
| 122 | /// struct B2 : A { }; |
| 123 | /// struct C : B1, B2 { virtual void f(); }; |
| 124 | /// |
| 125 | /// when we determine that C::f() overrides A::f(), we need to update the |
| 126 | /// overriders map for both A-in-B1 and A-in-B2 and the subobject offsets map |
| 127 | /// will have the subobject offsets for both A copies. |
Anders Carlsson | 5b0057c | 2010-03-03 04:58:02 +0000 | [diff] [blame] | 128 | typedef llvm::DenseMap<const CXXRecordDecl *, OffsetSetVectorTy> |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 129 | SubobjectOffsetsMapTy; |
| 130 | |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 131 | /// ComputeFinalOverriders - Compute the final overriders for a given base |
| 132 | /// subobject (and all its direct and indirect bases). |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 133 | void ComputeFinalOverriders(BaseSubobject Base, |
Anders Carlsson | 231461f | 2010-02-17 17:48:25 +0000 | [diff] [blame] | 134 | bool BaseSubobjectIsVisitedVBase, |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 135 | uint64_t OffsetInLayoutClass, |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 136 | SubobjectOffsetsMapTy &Offsets); |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 137 | |
| 138 | /// AddOverriders - Add the final overriders for this base subobject to the |
| 139 | /// map of final overriders. |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 140 | void AddOverriders(BaseSubobject Base,uint64_t OffsetInLayoutClass, |
| 141 | SubobjectOffsetsMapTy &Offsets); |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 142 | |
| 143 | /// PropagateOverrider - Propagate the NewMD overrider to all the functions |
| 144 | /// that OldMD overrides. For example, if we have: |
| 145 | /// |
| 146 | /// struct A { virtual void f(); }; |
| 147 | /// struct B : A { virtual void f(); }; |
| 148 | /// struct C : B { virtual void f(); }; |
| 149 | /// |
| 150 | /// and we want to override B::f with C::f, we also need to override A::f with |
| 151 | /// C::f. |
| 152 | void PropagateOverrider(const CXXMethodDecl *OldMD, |
Anders Carlsson | a678aa1 | 2010-02-13 22:23:31 +0000 | [diff] [blame] | 153 | BaseSubobject NewBase, |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 154 | uint64_t OverriderOffsetInLayoutClass, |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 155 | const CXXMethodDecl *NewMD, |
| 156 | SubobjectOffsetsMapTy &Offsets); |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 157 | |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 158 | static void MergeSubobjectOffsets(const SubobjectOffsetsMapTy &NewOffsets, |
| 159 | SubobjectOffsetsMapTy &Offsets); |
| 160 | |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 161 | public: |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 162 | FinalOverriders(const CXXRecordDecl *MostDerivedClass, |
| 163 | uint64_t MostDerivedClassOffset, |
| 164 | const CXXRecordDecl *LayoutClass); |
Anders Carlsson | 8025e7b | 2010-02-24 22:18:01 +0000 | [diff] [blame] | 165 | |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 166 | /// getOverrider - Get the final overrider for the given method declaration in |
| 167 | /// the given base subobject. |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 168 | OverriderInfo getOverrider(BaseSubobject Base, |
| 169 | const CXXMethodDecl *MD) const { |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 170 | assert(OverridersMap.count(std::make_pair(Base, MD)) && |
| 171 | "Did not find overrider!"); |
| 172 | |
| 173 | return OverridersMap.lookup(std::make_pair(Base, MD)); |
| 174 | } |
| 175 | |
Anders Carlsson | d3adb0c | 2010-02-13 23:40:17 +0000 | [diff] [blame] | 176 | /// getReturnAdjustmentOffset - Get the return adjustment offset for the |
| 177 | /// method decl in the given base subobject. Returns an empty base offset if |
| 178 | /// no adjustment is needed. |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 179 | BaseOffset getReturnAdjustmentOffset(BaseSubobject Base, |
| 180 | const CXXMethodDecl *MD) const { |
| 181 | return ReturnAdjustments.lookup(std::make_pair(Base, MD)); |
| 182 | } |
| 183 | |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 184 | /// dump - dump the final overriders. |
Anders Carlsson | 6a7e6a4 | 2010-02-14 00:37:35 +0000 | [diff] [blame] | 185 | void dump() { |
| 186 | assert(VisitedVirtualBases.empty() && |
| 187 | "Visited virtual bases aren't empty!"); |
| 188 | dump(llvm::errs(), BaseSubobject(MostDerivedClass, 0)); |
| 189 | VisitedVirtualBases.clear(); |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | /// dump - dump the final overriders for a base subobject, and all its direct |
| 193 | /// and indirect base subobjects. |
Anders Carlsson | 6a7e6a4 | 2010-02-14 00:37:35 +0000 | [diff] [blame] | 194 | void dump(llvm::raw_ostream &Out, BaseSubobject Base); |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 195 | }; |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 196 | |
Anders Carlsson | 603d7d1 | 2010-02-27 20:02:53 +0000 | [diff] [blame] | 197 | #define DUMP_OVERRIDERS 0 |
| 198 | |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 199 | FinalOverriders::FinalOverriders(const CXXRecordDecl *MostDerivedClass, |
| 200 | uint64_t MostDerivedClassOffset, |
| 201 | const CXXRecordDecl *LayoutClass) |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 202 | : MostDerivedClass(MostDerivedClass), |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 203 | MostDerivedClassOffset(MostDerivedClassOffset), LayoutClass(LayoutClass), |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 204 | Context(MostDerivedClass->getASTContext()), |
| 205 | MostDerivedClassLayout(Context.getASTRecordLayout(MostDerivedClass)) { |
| 206 | |
| 207 | // Compute the final overriders. |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 208 | SubobjectOffsetsMapTy Offsets; |
Anders Carlsson | 231461f | 2010-02-17 17:48:25 +0000 | [diff] [blame] | 209 | ComputeFinalOverriders(BaseSubobject(MostDerivedClass, 0), |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 210 | /*BaseSubobjectIsVisitedVBase=*/false, |
| 211 | MostDerivedClassOffset, Offsets); |
Anders Carlsson | 231461f | 2010-02-17 17:48:25 +0000 | [diff] [blame] | 212 | VisitedVirtualBases.clear(); |
Anders Carlsson | 603d7d1 | 2010-02-27 20:02:53 +0000 | [diff] [blame] | 213 | |
| 214 | #if DUMP_OVERRIDERS |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 215 | // And dump them (for now). |
| 216 | dump(); |
Anders Carlsson | 3f9917d | 2010-02-13 21:33:22 +0000 | [diff] [blame] | 217 | |
| 218 | // Also dump the base offsets (for now). |
| 219 | for (SubobjectOffsetsMapTy::const_iterator I = Offsets.begin(), |
| 220 | E = Offsets.end(); I != E; ++I) { |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 221 | const OffsetSetVectorTy& OffsetSetVector = I->second; |
Anders Carlsson | 3f9917d | 2010-02-13 21:33:22 +0000 | [diff] [blame] | 222 | |
| 223 | llvm::errs() << "Base offsets for "; |
| 224 | llvm::errs() << I->first->getQualifiedNameAsString() << '\n'; |
| 225 | |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 226 | for (unsigned I = 0, E = OffsetSetVector.size(); I != E; ++I) |
| 227 | llvm::errs() << " " << I << " - " << OffsetSetVector[I] / 8 << '\n'; |
Anders Carlsson | 3f9917d | 2010-02-13 21:33:22 +0000 | [diff] [blame] | 228 | } |
Anders Carlsson | 603d7d1 | 2010-02-27 20:02:53 +0000 | [diff] [blame] | 229 | #endif |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 230 | } |
| 231 | |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 232 | void FinalOverriders::AddOverriders(BaseSubobject Base, |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 233 | uint64_t OffsetInLayoutClass, |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 234 | SubobjectOffsetsMapTy &Offsets) { |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 235 | const CXXRecordDecl *RD = Base.getBase(); |
| 236 | |
| 237 | for (CXXRecordDecl::method_iterator I = RD->method_begin(), |
| 238 | E = RD->method_end(); I != E; ++I) { |
| 239 | const CXXMethodDecl *MD = *I; |
| 240 | |
| 241 | if (!MD->isVirtual()) |
| 242 | continue; |
| 243 | |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 244 | // First, propagate the overrider. |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 245 | PropagateOverrider(MD, Base, OffsetInLayoutClass, MD, Offsets); |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 246 | |
| 247 | // Add the overrider as the final overrider of itself. |
Anders Carlsson | 136bd19 | 2010-02-12 16:55:34 +0000 | [diff] [blame] | 248 | OverriderInfo& Overrider = OverridersMap[std::make_pair(Base, MD)]; |
| 249 | assert(!Overrider.Method && "Overrider should not exist yet!"); |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 250 | |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 251 | Overrider.Offset = OffsetInLayoutClass; |
Anders Carlsson | 136bd19 | 2010-02-12 16:55:34 +0000 | [diff] [blame] | 252 | Overrider.Method = MD; |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 253 | } |
| 254 | } |
| 255 | |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 256 | static BaseOffset ComputeBaseOffset(ASTContext &Context, |
| 257 | const CXXRecordDecl *DerivedRD, |
| 258 | const CXXBasePath &Path) { |
Anders Carlsson | cce9ee8 | 2010-02-13 23:17:31 +0000 | [diff] [blame] | 259 | int64_t NonVirtualOffset = 0; |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 260 | |
Anders Carlsson | f3f6784 | 2010-02-13 20:41:15 +0000 | [diff] [blame] | 261 | unsigned NonVirtualStart = 0; |
| 262 | const CXXRecordDecl *VirtualBase = 0; |
| 263 | |
| 264 | // First, look for the virtual base class. |
| 265 | for (unsigned I = 0, E = Path.size(); I != E; ++I) { |
| 266 | const CXXBasePathElement &Element = Path[I]; |
| 267 | |
| 268 | if (Element.Base->isVirtual()) { |
| 269 | // FIXME: Can we break when we find the first virtual base? |
| 270 | // (If we can't, can't we just iterate over the path in reverse order?) |
| 271 | NonVirtualStart = I + 1; |
| 272 | QualType VBaseType = Element.Base->getType(); |
| 273 | VirtualBase = |
| 274 | cast<CXXRecordDecl>(VBaseType->getAs<RecordType>()->getDecl()); |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | // Now compute the non-virtual offset. |
| 279 | for (unsigned I = NonVirtualStart, E = Path.size(); I != E; ++I) { |
| 280 | const CXXBasePathElement &Element = Path[I]; |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 281 | |
| 282 | // Check the base class offset. |
| 283 | const ASTRecordLayout &Layout = Context.getASTRecordLayout(Element.Class); |
Anders Carlsson | ed7d0e8 | 2010-02-25 22:18:35 +0000 | [diff] [blame] | 284 | |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 285 | const RecordType *BaseType = Element.Base->getType()->getAs<RecordType>(); |
| 286 | const CXXRecordDecl *Base = cast<CXXRecordDecl>(BaseType->getDecl()); |
Anders Carlsson | ed7d0e8 | 2010-02-25 22:18:35 +0000 | [diff] [blame] | 287 | |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 288 | NonVirtualOffset += Layout.getBaseClassOffset(Base); |
| 289 | } |
| 290 | |
| 291 | // FIXME: This should probably use CharUnits or something. Maybe we should |
| 292 | // even change the base offsets in ASTRecordLayout to be specified in |
| 293 | // CharUnits. |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 294 | return BaseOffset(DerivedRD, VirtualBase, NonVirtualOffset / 8); |
Anders Carlsson | 258a1e3 | 2010-02-14 00:16:19 +0000 | [diff] [blame] | 295 | |
| 296 | } |
| 297 | |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 298 | static BaseOffset ComputeBaseOffset(ASTContext &Context, |
| 299 | const CXXRecordDecl *BaseRD, |
| 300 | const CXXRecordDecl *DerivedRD) { |
Anders Carlsson | 258a1e3 | 2010-02-14 00:16:19 +0000 | [diff] [blame] | 301 | CXXBasePaths Paths(/*FindAmbiguities=*/false, |
| 302 | /*RecordPaths=*/true, /*DetectVirtual=*/false); |
| 303 | |
| 304 | if (!const_cast<CXXRecordDecl *>(DerivedRD)-> |
| 305 | isDerivedFrom(const_cast<CXXRecordDecl *>(BaseRD), Paths)) { |
| 306 | assert(false && "Class must be derived from the passed in base class!"); |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 307 | return BaseOffset(); |
Anders Carlsson | 258a1e3 | 2010-02-14 00:16:19 +0000 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | return ComputeBaseOffset(Context, DerivedRD, Paths.front()); |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 311 | } |
| 312 | |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 313 | static BaseOffset |
Anders Carlsson | cce9ee8 | 2010-02-13 23:17:31 +0000 | [diff] [blame] | 314 | ComputeReturnAdjustmentBaseOffset(ASTContext &Context, |
| 315 | const CXXMethodDecl *DerivedMD, |
| 316 | const CXXMethodDecl *BaseMD) { |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 317 | const FunctionType *BaseFT = BaseMD->getType()->getAs<FunctionType>(); |
| 318 | const FunctionType *DerivedFT = DerivedMD->getType()->getAs<FunctionType>(); |
| 319 | |
| 320 | // Canonicalize the return types. |
| 321 | CanQualType CanDerivedReturnType = |
| 322 | Context.getCanonicalType(DerivedFT->getResultType()); |
| 323 | CanQualType CanBaseReturnType = |
| 324 | Context.getCanonicalType(BaseFT->getResultType()); |
| 325 | |
| 326 | assert(CanDerivedReturnType->getTypeClass() == |
| 327 | CanBaseReturnType->getTypeClass() && |
| 328 | "Types must have same type class!"); |
| 329 | |
| 330 | if (CanDerivedReturnType == CanBaseReturnType) { |
| 331 | // No adjustment needed. |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 332 | return BaseOffset(); |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | if (isa<ReferenceType>(CanDerivedReturnType)) { |
| 336 | CanDerivedReturnType = |
| 337 | CanDerivedReturnType->getAs<ReferenceType>()->getPointeeType(); |
| 338 | CanBaseReturnType = |
| 339 | CanBaseReturnType->getAs<ReferenceType>()->getPointeeType(); |
| 340 | } else if (isa<PointerType>(CanDerivedReturnType)) { |
| 341 | CanDerivedReturnType = |
| 342 | CanDerivedReturnType->getAs<PointerType>()->getPointeeType(); |
| 343 | CanBaseReturnType = |
| 344 | CanBaseReturnType->getAs<PointerType>()->getPointeeType(); |
| 345 | } else { |
| 346 | assert(false && "Unexpected return type!"); |
| 347 | } |
| 348 | |
| 349 | // We need to compare unqualified types here; consider |
| 350 | // const T *Base::foo(); |
| 351 | // T *Derived::foo(); |
| 352 | if (CanDerivedReturnType.getUnqualifiedType() == |
| 353 | CanBaseReturnType.getUnqualifiedType()) { |
| 354 | // No adjustment needed. |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 355 | return BaseOffset(); |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | const CXXRecordDecl *DerivedRD = |
| 359 | cast<CXXRecordDecl>(cast<RecordType>(CanDerivedReturnType)->getDecl()); |
| 360 | |
| 361 | const CXXRecordDecl *BaseRD = |
| 362 | cast<CXXRecordDecl>(cast<RecordType>(CanBaseReturnType)->getDecl()); |
| 363 | |
Anders Carlsson | cce9ee8 | 2010-02-13 23:17:31 +0000 | [diff] [blame] | 364 | return ComputeBaseOffset(Context, BaseRD, DerivedRD); |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 365 | } |
| 366 | |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 367 | void FinalOverriders::PropagateOverrider(const CXXMethodDecl *OldMD, |
Anders Carlsson | a678aa1 | 2010-02-13 22:23:31 +0000 | [diff] [blame] | 368 | BaseSubobject NewBase, |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 369 | uint64_t OverriderOffsetInLayoutClass, |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 370 | const CXXMethodDecl *NewMD, |
| 371 | SubobjectOffsetsMapTy &Offsets) { |
| 372 | for (CXXMethodDecl::method_iterator I = OldMD->begin_overridden_methods(), |
| 373 | E = OldMD->end_overridden_methods(); I != E; ++I) { |
| 374 | const CXXMethodDecl *OverriddenMD = *I; |
| 375 | const CXXRecordDecl *OverriddenRD = OverriddenMD->getParent(); |
| 376 | |
| 377 | // We want to override OverriddenMD in all subobjects, for example: |
| 378 | // |
| 379 | /// struct A { virtual void f(); }; |
| 380 | /// struct B1 : A { }; |
| 381 | /// struct B2 : A { }; |
| 382 | /// struct C : B1, B2 { virtual void f(); }; |
| 383 | /// |
| 384 | /// When overriding A::f with C::f we need to do so in both A subobjects. |
Anders Carlsson | 5b0057c | 2010-03-03 04:58:02 +0000 | [diff] [blame] | 385 | const OffsetSetVectorTy &OffsetVector = Offsets[OverriddenRD]; |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 386 | |
| 387 | // Go through all the subobjects. |
| 388 | for (unsigned I = 0, E = OffsetVector.size(); I != E; ++I) { |
| 389 | uint64_t Offset = OffsetVector[I]; |
| 390 | |
Anders Carlsson | 258a1e3 | 2010-02-14 00:16:19 +0000 | [diff] [blame] | 391 | BaseSubobject OverriddenSubobject = BaseSubobject(OverriddenRD, Offset); |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 392 | BaseSubobjectMethodPairTy SubobjectAndMethod = |
Anders Carlsson | 258a1e3 | 2010-02-14 00:16:19 +0000 | [diff] [blame] | 393 | std::make_pair(OverriddenSubobject, OverriddenMD); |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 394 | |
| 395 | OverriderInfo &Overrider = OverridersMap[SubobjectAndMethod]; |
| 396 | |
Anders Carlsson | 136bd19 | 2010-02-12 16:55:34 +0000 | [diff] [blame] | 397 | assert(Overrider.Method && "Did not find existing overrider!"); |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 398 | |
Anders Carlsson | cce9ee8 | 2010-02-13 23:17:31 +0000 | [diff] [blame] | 399 | // Check if we need return adjustments or base adjustments. |
Anders Carlsson | c1290ad | 2010-02-13 21:16:54 +0000 | [diff] [blame] | 400 | // (We don't want to do this for pure virtual member functions). |
| 401 | if (!NewMD->isPure()) { |
Anders Carlsson | cce9ee8 | 2010-02-13 23:17:31 +0000 | [diff] [blame] | 402 | // Get the return adjustment base offset. |
Anders Carlsson | c1290ad | 2010-02-13 21:16:54 +0000 | [diff] [blame] | 403 | BaseOffset ReturnBaseOffset = |
Anders Carlsson | cce9ee8 | 2010-02-13 23:17:31 +0000 | [diff] [blame] | 404 | ComputeReturnAdjustmentBaseOffset(Context, NewMD, OverriddenMD); |
| 405 | |
Anders Carlsson | c1290ad | 2010-02-13 21:16:54 +0000 | [diff] [blame] | 406 | if (!ReturnBaseOffset.isEmpty()) { |
| 407 | // Store the return adjustment base offset. |
| 408 | ReturnAdjustments[SubobjectAndMethod] = ReturnBaseOffset; |
| 409 | } |
Anders Carlsson | 8e661e1 | 2010-02-12 17:13:23 +0000 | [diff] [blame] | 410 | } |
| 411 | |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 412 | // Set the new overrider. |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 413 | Overrider.Offset = OverriderOffsetInLayoutClass; |
Anders Carlsson | 136bd19 | 2010-02-12 16:55:34 +0000 | [diff] [blame] | 414 | Overrider.Method = NewMD; |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 415 | |
| 416 | // And propagate it further. |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 417 | PropagateOverrider(OverriddenMD, NewBase, OverriderOffsetInLayoutClass, |
| 418 | NewMD, Offsets); |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 419 | } |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | void |
| 424 | FinalOverriders::MergeSubobjectOffsets(const SubobjectOffsetsMapTy &NewOffsets, |
| 425 | SubobjectOffsetsMapTy &Offsets) { |
| 426 | // Iterate over the new offsets. |
| 427 | for (SubobjectOffsetsMapTy::const_iterator I = NewOffsets.begin(), |
| 428 | E = NewOffsets.end(); I != E; ++I) { |
| 429 | const CXXRecordDecl *NewRD = I->first; |
Anders Carlsson | 5b0057c | 2010-03-03 04:58:02 +0000 | [diff] [blame] | 430 | const OffsetSetVectorTy& NewOffsetVector = I->second; |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 431 | |
Anders Carlsson | 5b0057c | 2010-03-03 04:58:02 +0000 | [diff] [blame] | 432 | OffsetSetVectorTy &OffsetVector = Offsets[NewRD]; |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 433 | |
Anders Carlsson | 5b0057c | 2010-03-03 04:58:02 +0000 | [diff] [blame] | 434 | // Merge the new offsets set vector into the old. |
| 435 | OffsetVector.insert(NewOffsetVector.begin(), NewOffsetVector.end()); |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 436 | } |
| 437 | } |
| 438 | |
| 439 | void FinalOverriders::ComputeFinalOverriders(BaseSubobject Base, |
Anders Carlsson | 231461f | 2010-02-17 17:48:25 +0000 | [diff] [blame] | 440 | bool BaseSubobjectIsVisitedVBase, |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 441 | uint64_t OffsetInLayoutClass, |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 442 | SubobjectOffsetsMapTy &Offsets) { |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 443 | const CXXRecordDecl *RD = Base.getBase(); |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 444 | const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD); |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 445 | |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 446 | SubobjectOffsetsMapTy NewOffsets; |
| 447 | |
| 448 | for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(), |
| 449 | E = RD->bases_end(); I != E; ++I) { |
| 450 | const CXXRecordDecl *BaseDecl = |
| 451 | cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl()); |
| 452 | |
Anders Carlsson | 033d486 | 2010-02-14 17:05:59 +0000 | [diff] [blame] | 453 | // Ignore bases that don't have any virtual member functions. |
| 454 | if (!BaseDecl->isPolymorphic()) |
| 455 | continue; |
| 456 | |
Anders Carlsson | ed7d0e8 | 2010-02-25 22:18:35 +0000 | [diff] [blame] | 457 | bool IsVisitedVirtualBase = BaseSubobjectIsVisitedVBase; |
Anders Carlsson | 6a7e6a4 | 2010-02-14 00:37:35 +0000 | [diff] [blame] | 458 | uint64_t BaseOffset; |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 459 | uint64_t BaseOffsetInLayoutClass; |
Anders Carlsson | 6a7e6a4 | 2010-02-14 00:37:35 +0000 | [diff] [blame] | 460 | if (I->isVirtual()) { |
Anders Carlsson | 231461f | 2010-02-17 17:48:25 +0000 | [diff] [blame] | 461 | if (!VisitedVirtualBases.insert(BaseDecl)) |
| 462 | IsVisitedVirtualBase = true; |
Anders Carlsson | 6a7e6a4 | 2010-02-14 00:37:35 +0000 | [diff] [blame] | 463 | BaseOffset = MostDerivedClassLayout.getVBaseClassOffset(BaseDecl); |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 464 | |
| 465 | const ASTRecordLayout &LayoutClassLayout = |
| 466 | Context.getASTRecordLayout(LayoutClass); |
| 467 | BaseOffsetInLayoutClass = |
| 468 | LayoutClassLayout.getVBaseClassOffset(BaseDecl); |
Anders Carlsson | 6a7e6a4 | 2010-02-14 00:37:35 +0000 | [diff] [blame] | 469 | } else { |
| 470 | BaseOffset = Layout.getBaseClassOffset(BaseDecl) + Base.getBaseOffset(); |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 471 | BaseOffsetInLayoutClass = Layout.getBaseClassOffset(BaseDecl) + |
| 472 | OffsetInLayoutClass; |
Anders Carlsson | 6a7e6a4 | 2010-02-14 00:37:35 +0000 | [diff] [blame] | 473 | } |
| 474 | |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 475 | // Compute the final overriders for this base. |
Anders Carlsson | 231461f | 2010-02-17 17:48:25 +0000 | [diff] [blame] | 476 | // We always want to compute the final overriders, even if the base is a |
| 477 | // visited virtual base. Consider: |
| 478 | // |
| 479 | // struct A { |
| 480 | // virtual void f(); |
| 481 | // virtual void g(); |
| 482 | // }; |
| 483 | // |
| 484 | // struct B : virtual A { |
| 485 | // void f(); |
| 486 | // }; |
| 487 | // |
| 488 | // struct C : virtual A { |
| 489 | // void g (); |
| 490 | // }; |
| 491 | // |
| 492 | // struct D : B, C { }; |
| 493 | // |
| 494 | // Here, we still want to compute the overriders for A as a base of C, |
| 495 | // because otherwise we'll miss that C::g overrides A::f. |
| 496 | ComputeFinalOverriders(BaseSubobject(BaseDecl, BaseOffset), |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 497 | IsVisitedVirtualBase, BaseOffsetInLayoutClass, |
| 498 | NewOffsets); |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 499 | } |
| 500 | |
| 501 | /// Now add the overriders for this particular subobject. |
Anders Carlsson | 231461f | 2010-02-17 17:48:25 +0000 | [diff] [blame] | 502 | /// (We don't want to do this more than once for a virtual base). |
| 503 | if (!BaseSubobjectIsVisitedVBase) |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 504 | AddOverriders(Base, OffsetInLayoutClass, NewOffsets); |
Anders Carlsson | 9fbf6d9 | 2010-02-12 01:40:03 +0000 | [diff] [blame] | 505 | |
| 506 | // And merge the newly discovered subobject offsets. |
| 507 | MergeSubobjectOffsets(NewOffsets, Offsets); |
| 508 | |
| 509 | /// Finally, add the offset for our own subobject. |
Anders Carlsson | 5b0057c | 2010-03-03 04:58:02 +0000 | [diff] [blame] | 510 | Offsets[RD].insert(Base.getBaseOffset()); |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 511 | } |
| 512 | |
Anders Carlsson | 6a7e6a4 | 2010-02-14 00:37:35 +0000 | [diff] [blame] | 513 | void FinalOverriders::dump(llvm::raw_ostream &Out, BaseSubobject Base) { |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 514 | const CXXRecordDecl *RD = Base.getBase(); |
| 515 | const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD); |
| 516 | |
| 517 | for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(), |
| 518 | E = RD->bases_end(); I != E; ++I) { |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 519 | const CXXRecordDecl *BaseDecl = |
| 520 | cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl()); |
| 521 | |
Anders Carlsson | 033d486 | 2010-02-14 17:05:59 +0000 | [diff] [blame] | 522 | // Ignore bases that don't have any virtual member functions. |
| 523 | if (!BaseDecl->isPolymorphic()) |
| 524 | continue; |
| 525 | |
Anders Carlsson | 6a7e6a4 | 2010-02-14 00:37:35 +0000 | [diff] [blame] | 526 | uint64_t BaseOffset; |
| 527 | if (I->isVirtual()) { |
| 528 | if (!VisitedVirtualBases.insert(BaseDecl)) { |
| 529 | // We've visited this base before. |
| 530 | continue; |
| 531 | } |
| 532 | |
| 533 | BaseOffset = MostDerivedClassLayout.getVBaseClassOffset(BaseDecl); |
| 534 | } else { |
| 535 | BaseOffset = Layout.getBaseClassOffset(BaseDecl) + |
| 536 | Base.getBaseOffset(); |
| 537 | } |
| 538 | |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 539 | dump(Out, BaseSubobject(BaseDecl, BaseOffset)); |
| 540 | } |
| 541 | |
| 542 | Out << "Final overriders for (" << RD->getQualifiedNameAsString() << ", "; |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 543 | Out << Base.getBaseOffset() / 8 << ")\n"; |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 544 | |
| 545 | // Now dump the overriders for this base subobject. |
| 546 | for (CXXRecordDecl::method_iterator I = RD->method_begin(), |
| 547 | E = RD->method_end(); I != E; ++I) { |
| 548 | const CXXMethodDecl *MD = *I; |
| 549 | |
| 550 | if (!MD->isVirtual()) |
| 551 | continue; |
| 552 | |
Anders Carlsson | 136bd19 | 2010-02-12 16:55:34 +0000 | [diff] [blame] | 553 | OverriderInfo Overrider = getOverrider(Base, MD); |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 554 | |
Anders Carlsson | 6f1f002 | 2010-03-02 03:44:06 +0000 | [diff] [blame] | 555 | Out << " " << MD->getQualifiedNameAsString() << " - ("; |
Anders Carlsson | 8e661e1 | 2010-02-12 17:13:23 +0000 | [diff] [blame] | 556 | Out << Overrider.Method->getQualifiedNameAsString(); |
Anders Carlsson | 3c28967 | 2010-03-12 05:02:01 +0000 | [diff] [blame^] | 557 | Out << ", " << ", " << Overrider.Offset / 8 << ')'; |
Anders Carlsson | 6f1f002 | 2010-03-02 03:44:06 +0000 | [diff] [blame] | 558 | |
Benjamin Kramer | 02c6737 | 2010-02-13 09:11:28 +0000 | [diff] [blame] | 559 | AdjustmentOffsetsMapTy::const_iterator AI = |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 560 | ReturnAdjustments.find(std::make_pair(Base, MD)); |
Benjamin Kramer | 02c6737 | 2010-02-13 09:11:28 +0000 | [diff] [blame] | 561 | if (AI != ReturnAdjustments.end()) { |
| 562 | const BaseOffset &Offset = AI->second; |
Anders Carlsson | f3f6784 | 2010-02-13 20:41:15 +0000 | [diff] [blame] | 563 | |
| 564 | Out << " [ret-adj: "; |
| 565 | if (Offset.VirtualBase) |
| 566 | Out << Offset.VirtualBase->getQualifiedNameAsString() << " vbase, "; |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 567 | |
Anders Carlsson | f3f6784 | 2010-02-13 20:41:15 +0000 | [diff] [blame] | 568 | Out << Offset.NonVirtualOffset << " nv]"; |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 569 | } |
Anders Carlsson | cce9ee8 | 2010-02-13 23:17:31 +0000 | [diff] [blame] | 570 | |
Anders Carlsson | 8e661e1 | 2010-02-12 17:13:23 +0000 | [diff] [blame] | 571 | Out << "\n"; |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 572 | } |
| 573 | } |
| 574 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 575 | /// VtableComponent - Represents a single component in a vtable. |
| 576 | class VtableComponent { |
| 577 | public: |
| 578 | enum Kind { |
| 579 | CK_VCallOffset, |
| 580 | CK_VBaseOffset, |
| 581 | CK_OffsetToTop, |
| 582 | CK_RTTI, |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 583 | CK_FunctionPointer, |
| 584 | |
| 585 | /// CK_CompleteDtorPointer - A pointer to the complete destructor. |
| 586 | CK_CompleteDtorPointer, |
| 587 | |
| 588 | /// CK_DeletingDtorPointer - A pointer to the deleting destructor. |
Anders Carlsson | 350b56e | 2010-02-19 20:08:13 +0000 | [diff] [blame] | 589 | CK_DeletingDtorPointer, |
| 590 | |
| 591 | /// CK_UnusedFunctionPointer - In some cases, a vtable function pointer |
| 592 | /// will end up never being called. Such vtable function pointers are |
| 593 | /// represented as a CK_UnusedFunctionPointer. |
| 594 | CK_UnusedFunctionPointer |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 595 | }; |
| 596 | |
Anders Carlsson | b0a588f | 2010-02-17 06:07:19 +0000 | [diff] [blame] | 597 | static VtableComponent MakeVCallOffset(int64_t Offset) { |
| 598 | return VtableComponent(CK_VCallOffset, Offset); |
| 599 | } |
| 600 | |
Anders Carlsson | dc2dba3 | 2010-02-16 04:49:44 +0000 | [diff] [blame] | 601 | static VtableComponent MakeVBaseOffset(int64_t Offset) { |
| 602 | return VtableComponent(CK_VBaseOffset, Offset); |
| 603 | } |
| 604 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 605 | static VtableComponent MakeOffsetToTop(int64_t Offset) { |
| 606 | return VtableComponent(CK_OffsetToTop, Offset); |
| 607 | } |
| 608 | |
| 609 | static VtableComponent MakeRTTI(const CXXRecordDecl *RD) { |
| 610 | return VtableComponent(CK_RTTI, reinterpret_cast<uintptr_t>(RD)); |
| 611 | } |
| 612 | |
| 613 | static VtableComponent MakeFunction(const CXXMethodDecl *MD) { |
| 614 | assert(!isa<CXXDestructorDecl>(MD) && |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 615 | "Don't use MakeFunction with destructors!"); |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 616 | |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 617 | return VtableComponent(CK_FunctionPointer, |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 618 | reinterpret_cast<uintptr_t>(MD)); |
| 619 | } |
| 620 | |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 621 | static VtableComponent MakeCompleteDtor(const CXXDestructorDecl *DD) { |
| 622 | return VtableComponent(CK_CompleteDtorPointer, |
| 623 | reinterpret_cast<uintptr_t>(DD)); |
| 624 | } |
| 625 | |
| 626 | static VtableComponent MakeDeletingDtor(const CXXDestructorDecl *DD) { |
| 627 | return VtableComponent(CK_DeletingDtorPointer, |
| 628 | reinterpret_cast<uintptr_t>(DD)); |
| 629 | } |
| 630 | |
Anders Carlsson | 350b56e | 2010-02-19 20:08:13 +0000 | [diff] [blame] | 631 | static VtableComponent MakeUnusedFunction(const CXXMethodDecl *MD) { |
| 632 | assert(!isa<CXXDestructorDecl>(MD) && |
| 633 | "Don't use MakeUnusedFunction with destructors!"); |
| 634 | return VtableComponent(CK_UnusedFunctionPointer, |
| 635 | reinterpret_cast<uintptr_t>(MD)); |
| 636 | } |
| 637 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 638 | /// getKind - Get the kind of this vtable component. |
| 639 | Kind getKind() const { |
| 640 | return (Kind)(Value & 0x7); |
| 641 | } |
| 642 | |
Anders Carlsson | b0a588f | 2010-02-17 06:07:19 +0000 | [diff] [blame] | 643 | int64_t getVCallOffset() const { |
| 644 | assert(getKind() == CK_VCallOffset && "Invalid component kind!"); |
| 645 | |
| 646 | return getOffset(); |
| 647 | } |
| 648 | |
Anders Carlsson | dc2dba3 | 2010-02-16 04:49:44 +0000 | [diff] [blame] | 649 | int64_t getVBaseOffset() const { |
| 650 | assert(getKind() == CK_VBaseOffset && "Invalid component kind!"); |
| 651 | |
| 652 | return getOffset(); |
| 653 | } |
| 654 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 655 | int64_t getOffsetToTop() const { |
| 656 | assert(getKind() == CK_OffsetToTop && "Invalid component kind!"); |
| 657 | |
| 658 | return getOffset(); |
| 659 | } |
| 660 | |
| 661 | const CXXRecordDecl *getRTTIDecl() const { |
| 662 | assert(getKind() == CK_RTTI && "Invalid component kind!"); |
| 663 | |
| 664 | return reinterpret_cast<CXXRecordDecl *>(getPointer()); |
| 665 | } |
| 666 | |
| 667 | const CXXMethodDecl *getFunctionDecl() const { |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 668 | assert(getKind() == CK_FunctionPointer); |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 669 | |
| 670 | return reinterpret_cast<CXXMethodDecl *>(getPointer()); |
| 671 | } |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 672 | |
| 673 | const CXXDestructorDecl *getDestructorDecl() const { |
| 674 | assert((getKind() == CK_CompleteDtorPointer || |
| 675 | getKind() == CK_DeletingDtorPointer) && "Invalid component kind!"); |
| 676 | |
| 677 | return reinterpret_cast<CXXDestructorDecl *>(getPointer()); |
| 678 | } |
| 679 | |
Anders Carlsson | 350b56e | 2010-02-19 20:08:13 +0000 | [diff] [blame] | 680 | const CXXMethodDecl *getUnusedFunctionDecl() const { |
| 681 | assert(getKind() == CK_UnusedFunctionPointer); |
| 682 | |
| 683 | return reinterpret_cast<CXXMethodDecl *>(getPointer()); |
| 684 | } |
| 685 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 686 | private: |
| 687 | VtableComponent(Kind ComponentKind, int64_t Offset) { |
| 688 | assert((ComponentKind == CK_VCallOffset || |
| 689 | ComponentKind == CK_VBaseOffset || |
| 690 | ComponentKind == CK_OffsetToTop) && "Invalid component kind!"); |
| 691 | assert(Offset <= ((1LL << 56) - 1) && "Offset is too big!"); |
| 692 | |
| 693 | Value = ((Offset << 3) | ComponentKind); |
| 694 | } |
| 695 | |
| 696 | VtableComponent(Kind ComponentKind, uintptr_t Ptr) { |
| 697 | assert((ComponentKind == CK_RTTI || |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 698 | ComponentKind == CK_FunctionPointer || |
| 699 | ComponentKind == CK_CompleteDtorPointer || |
Anders Carlsson | 350b56e | 2010-02-19 20:08:13 +0000 | [diff] [blame] | 700 | ComponentKind == CK_DeletingDtorPointer || |
| 701 | ComponentKind == CK_UnusedFunctionPointer) && |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 702 | "Invalid component kind!"); |
| 703 | |
| 704 | assert((Ptr & 7) == 0 && "Pointer not sufficiently aligned!"); |
| 705 | |
| 706 | Value = Ptr | ComponentKind; |
| 707 | } |
| 708 | |
| 709 | int64_t getOffset() const { |
| 710 | assert((getKind() == CK_VCallOffset || getKind() == CK_VBaseOffset || |
| 711 | getKind() == CK_OffsetToTop) && "Invalid component kind!"); |
| 712 | |
| 713 | return Value >> 3; |
| 714 | } |
| 715 | |
| 716 | uintptr_t getPointer() const { |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 717 | assert((getKind() == CK_RTTI || |
| 718 | getKind() == CK_FunctionPointer || |
| 719 | getKind() == CK_CompleteDtorPointer || |
Anders Carlsson | 350b56e | 2010-02-19 20:08:13 +0000 | [diff] [blame] | 720 | getKind() == CK_DeletingDtorPointer || |
| 721 | getKind() == CK_UnusedFunctionPointer) && |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 722 | "Invalid component kind!"); |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 723 | |
| 724 | return static_cast<uintptr_t>(Value & ~7ULL); |
| 725 | } |
| 726 | |
| 727 | /// The kind is stored in the lower 3 bits of the value. For offsets, we |
| 728 | /// make use of the facts that classes can't be larger than 2^55 bytes, |
| 729 | /// so we store the offset in the lower part of the 61 bytes that remain. |
| 730 | /// (The reason that we're not simply using a PointerIntPair here is that we |
| 731 | /// need the offsets to be 64-bit, even when on a 32-bit machine). |
| 732 | int64_t Value; |
| 733 | }; |
| 734 | |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 735 | /// VCallOffsetMap - Keeps track of vcall offsets when building a vtable. |
| 736 | struct VCallOffsetMap { |
| 737 | |
| 738 | typedef std::pair<const CXXMethodDecl *, int64_t> MethodAndOffsetPairTy; |
| 739 | |
| 740 | /// Offsets - Keeps track of methods and their offsets. |
| 741 | // FIXME: This should be a real map and not a vector. |
| 742 | llvm::SmallVector<MethodAndOffsetPairTy, 16> Offsets; |
| 743 | |
Anders Carlsson | 8847d9e | 2010-02-18 17:26:40 +0000 | [diff] [blame] | 744 | /// MethodsCanShareVCallOffset - Returns whether two virtual member functions |
| 745 | /// can share the same vcall offset. |
| 746 | static bool MethodsCanShareVCallOffset(const CXXMethodDecl *LHS, |
| 747 | const CXXMethodDecl *RHS); |
| 748 | |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 749 | public: |
| 750 | /// AddVCallOffset - Adds a vcall offset to the map. Returns true if the |
| 751 | /// add was successful, or false if there was already a member function with |
| 752 | /// the same signature in the map. |
| 753 | bool AddVCallOffset(const CXXMethodDecl *MD, int64_t OffsetOffset); |
| 754 | |
| 755 | /// getVCallOffsetOffset - Returns the vcall offset offset (relative to the |
| 756 | /// vtable address point) for the given virtual member function. |
| 757 | int64_t getVCallOffsetOffset(const CXXMethodDecl *MD); |
| 758 | |
Anders Carlsson | 9e3b3a3 | 2010-02-25 22:23:13 +0000 | [diff] [blame] | 759 | // empty - Return whether the offset map is empty or not. |
| 760 | bool empty() const { return Offsets.empty(); } |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 761 | }; |
| 762 | |
John McCall | 43c6ffb | 2010-02-26 20:22:44 +0000 | [diff] [blame] | 763 | static bool HasSameVirtualSignature(const CXXMethodDecl *LHS, |
| 764 | const CXXMethodDecl *RHS) { |
| 765 | ASTContext &C = LHS->getASTContext(); // TODO: thread this down |
| 766 | CanQual<FunctionProtoType> |
| 767 | LT = C.getCanonicalType(LHS->getType()).getAs<FunctionProtoType>(), |
| 768 | RT = C.getCanonicalType(RHS->getType()).getAs<FunctionProtoType>(); |
| 769 | |
| 770 | // Fast-path matches in the canonical types. |
| 771 | if (LT == RT) return true; |
| 772 | |
| 773 | // Force the signatures to match. We can't rely on the overrides |
| 774 | // list here because there isn't necessarily an inheritance |
| 775 | // relationship between the two methods. |
| 776 | if (LT.getQualifiers() != RT.getQualifiers() || |
| 777 | LT->getNumArgs() != RT->getNumArgs()) |
| 778 | return false; |
| 779 | for (unsigned I = 0, E = LT->getNumArgs(); I != E; ++I) |
| 780 | if (LT->getArgType(I) != RT->getArgType(I)) |
| 781 | return false; |
| 782 | return true; |
| 783 | } |
| 784 | |
Anders Carlsson | 8847d9e | 2010-02-18 17:26:40 +0000 | [diff] [blame] | 785 | bool VCallOffsetMap::MethodsCanShareVCallOffset(const CXXMethodDecl *LHS, |
| 786 | const CXXMethodDecl *RHS) { |
| 787 | assert(LHS->isVirtual() && "LHS must be virtual!"); |
| 788 | assert(RHS->isVirtual() && "LHS must be virtual!"); |
| 789 | |
Anders Carlsson | d69b2f9 | 2010-02-27 04:12:52 +0000 | [diff] [blame] | 790 | // A destructor can share a vcall offset with another destructor. |
| 791 | if (isa<CXXDestructorDecl>(LHS)) |
| 792 | return isa<CXXDestructorDecl>(RHS); |
| 793 | |
Anders Carlsson | 8847d9e | 2010-02-18 17:26:40 +0000 | [diff] [blame] | 794 | // FIXME: We need to check more things here. |
| 795 | |
Anders Carlsson | d69b2f9 | 2010-02-27 04:12:52 +0000 | [diff] [blame] | 796 | // The methods must have the same name. |
Anders Carlsson | 8847d9e | 2010-02-18 17:26:40 +0000 | [diff] [blame] | 797 | DeclarationName LHSName = LHS->getDeclName(); |
| 798 | DeclarationName RHSName = RHS->getDeclName(); |
John McCall | 43c6ffb | 2010-02-26 20:22:44 +0000 | [diff] [blame] | 799 | if (LHSName != RHSName) |
Anders Carlsson | 8847d9e | 2010-02-18 17:26:40 +0000 | [diff] [blame] | 800 | return false; |
John McCall | 43c6ffb | 2010-02-26 20:22:44 +0000 | [diff] [blame] | 801 | |
Anders Carlsson | d69b2f9 | 2010-02-27 04:12:52 +0000 | [diff] [blame] | 802 | // And the same signatures. |
| 803 | return HasSameVirtualSignature(LHS, RHS); |
Anders Carlsson | 8847d9e | 2010-02-18 17:26:40 +0000 | [diff] [blame] | 804 | } |
| 805 | |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 806 | bool VCallOffsetMap::AddVCallOffset(const CXXMethodDecl *MD, |
| 807 | int64_t OffsetOffset) { |
Anders Carlsson | 8847d9e | 2010-02-18 17:26:40 +0000 | [diff] [blame] | 808 | // Check if we can reuse an offset. |
| 809 | for (unsigned I = 0, E = Offsets.size(); I != E; ++I) { |
| 810 | if (MethodsCanShareVCallOffset(Offsets[I].first, MD)) |
| 811 | return false; |
| 812 | } |
| 813 | |
| 814 | // Add the offset. |
| 815 | Offsets.push_back(MethodAndOffsetPairTy(MD, OffsetOffset)); |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 816 | return true; |
| 817 | } |
| 818 | |
| 819 | int64_t VCallOffsetMap::getVCallOffsetOffset(const CXXMethodDecl *MD) { |
Anders Carlsson | 8847d9e | 2010-02-18 17:26:40 +0000 | [diff] [blame] | 820 | // Look for an offset. |
| 821 | for (unsigned I = 0, E = Offsets.size(); I != E; ++I) { |
| 822 | if (MethodsCanShareVCallOffset(Offsets[I].first, MD)) |
| 823 | return Offsets[I].second; |
| 824 | } |
| 825 | |
| 826 | assert(false && "Should always find a vcall offset offset!"); |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 827 | return 0; |
| 828 | } |
| 829 | |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 830 | /// VCallAndVBaseOffsetBuilder - Class for building vcall and vbase offsets. |
| 831 | class VCallAndVBaseOffsetBuilder { |
Anders Carlsson | dd819c9 | 2010-03-11 16:06:20 +0000 | [diff] [blame] | 832 | public: |
| 833 | typedef llvm::DenseMap<const CXXRecordDecl *, int64_t> |
| 834 | VBaseOffsetOffsetsMapTy; |
| 835 | |
| 836 | private: |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 837 | /// MostDerivedClass - The most derived class for which we're building vcall |
| 838 | /// and vbase offsets. |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 839 | const CXXRecordDecl *MostDerivedClass; |
| 840 | |
Anders Carlsson | c3f92a1 | 2010-02-27 21:09:00 +0000 | [diff] [blame] | 841 | /// LayoutClass - The class we're using for layout information. Will be |
| 842 | /// different than the most derived class if we're building a construction |
| 843 | /// vtable. |
| 844 | const CXXRecordDecl *LayoutClass; |
| 845 | |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 846 | /// Context - The ASTContext which we will use for layout information. |
| 847 | ASTContext &Context; |
| 848 | |
| 849 | /// Components - vcall and vbase offset components |
| 850 | typedef llvm::SmallVector<VtableComponent, 64> VtableComponentVectorTy; |
| 851 | VtableComponentVectorTy Components; |
| 852 | |
| 853 | /// VisitedVirtualBases - Visited virtual bases. |
| 854 | llvm::SmallPtrSet<const CXXRecordDecl *, 4> VisitedVirtualBases; |
| 855 | |
| 856 | /// VCallOffsets - Keeps track of vcall offsets. |
| 857 | VCallOffsetMap VCallOffsets; |
| 858 | |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 859 | |
| 860 | /// VBaseOffsetOffsets - Contains the offsets of the virtual base offsets, |
| 861 | /// relative to the address point. |
| 862 | VBaseOffsetOffsetsMapTy VBaseOffsetOffsets; |
| 863 | |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 864 | /// FinalOverriders - The final overriders of the most derived class. |
| 865 | /// (Can be null when we're not building a vtable of the most derived class). |
| 866 | const FinalOverriders *Overriders; |
| 867 | |
| 868 | /// AddVCallAndVBaseOffsets - Add vcall offsets and vbase offsets for the |
| 869 | /// given base subobject. |
| 870 | void AddVCallAndVBaseOffsets(BaseSubobject Base, bool BaseIsVirtual, |
| 871 | uint64_t RealBaseOffset); |
| 872 | |
| 873 | /// AddVCallOffsets - Add vcall offsets for the given base subobject. |
| 874 | void AddVCallOffsets(BaseSubobject Base, uint64_t VBaseOffset); |
| 875 | |
| 876 | /// AddVBaseOffsets - Add vbase offsets for the given class. |
Anders Carlsson | 93b1b49 | 2010-03-02 05:40:45 +0000 | [diff] [blame] | 877 | void AddVBaseOffsets(const CXXRecordDecl *Base, uint64_t OffsetInLayoutClass); |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 878 | |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 879 | /// getCurrentOffsetOffset - Get the current vcall or vbase offset offset in |
| 880 | /// bytes, relative to the vtable address point. |
| 881 | int64_t getCurrentOffsetOffset() const; |
| 882 | |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 883 | public: |
| 884 | VCallAndVBaseOffsetBuilder(const CXXRecordDecl *MostDerivedClass, |
Anders Carlsson | c3f92a1 | 2010-02-27 21:09:00 +0000 | [diff] [blame] | 885 | const CXXRecordDecl *LayoutClass, |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 886 | const FinalOverriders *Overriders, |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 887 | BaseSubobject Base, bool BaseIsVirtual, |
| 888 | uint64_t OffsetInLayoutClass) |
| 889 | : MostDerivedClass(MostDerivedClass), LayoutClass(LayoutClass), |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 890 | Context(MostDerivedClass->getASTContext()), Overriders(Overriders) { |
| 891 | |
| 892 | // Add vcall and vbase offsets. |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 893 | AddVCallAndVBaseOffsets(Base, BaseIsVirtual, OffsetInLayoutClass); |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 894 | } |
| 895 | |
| 896 | /// Methods for iterating over the components. |
| 897 | typedef VtableComponentVectorTy::const_reverse_iterator const_iterator; |
| 898 | const_iterator components_begin() const { return Components.rbegin(); } |
| 899 | const_iterator components_end() const { return Components.rend(); } |
| 900 | |
Anders Carlsson | dd819c9 | 2010-03-11 16:06:20 +0000 | [diff] [blame] | 901 | const VCallOffsetMap &getVCallOffsets() const { return VCallOffsets; } |
| 902 | const VBaseOffsetOffsetsMapTy &getVBaseOffsetOffsets() const { |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 903 | return VBaseOffsetOffsets; |
| 904 | } |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 905 | }; |
| 906 | |
| 907 | void |
| 908 | VCallAndVBaseOffsetBuilder::AddVCallAndVBaseOffsets(BaseSubobject Base, |
| 909 | bool BaseIsVirtual, |
| 910 | uint64_t RealBaseOffset) { |
| 911 | const ASTRecordLayout &Layout = Context.getASTRecordLayout(Base.getBase()); |
| 912 | |
| 913 | // Itanium C++ ABI 2.5.2: |
| 914 | // ..in classes sharing a virtual table with a primary base class, the vcall |
| 915 | // and vbase offsets added by the derived class all come before the vcall |
| 916 | // and vbase offsets required by the base class, so that the latter may be |
| 917 | // laid out as required by the base class without regard to additions from |
| 918 | // the derived class(es). |
| 919 | |
| 920 | // (Since we're emitting the vcall and vbase offsets in reverse order, we'll |
| 921 | // emit them for the primary base first). |
| 922 | if (const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase()) { |
| 923 | bool PrimaryBaseIsVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 924 | |
| 925 | uint64_t PrimaryBaseOffset; |
| 926 | |
| 927 | // Get the base offset of the primary base. |
| 928 | if (PrimaryBaseIsVirtual) { |
| 929 | assert(Layout.getVBaseClassOffset(PrimaryBase) == 0 && |
| 930 | "Primary vbase should have a zero offset!"); |
| 931 | |
| 932 | const ASTRecordLayout &MostDerivedClassLayout = |
| 933 | Context.getASTRecordLayout(MostDerivedClass); |
| 934 | |
| 935 | PrimaryBaseOffset = |
| 936 | MostDerivedClassLayout.getVBaseClassOffset(PrimaryBase); |
| 937 | } else { |
| 938 | assert(Layout.getBaseClassOffset(PrimaryBase) == 0 && |
| 939 | "Primary base should have a zero offset!"); |
| 940 | |
| 941 | PrimaryBaseOffset = Base.getBaseOffset(); |
| 942 | } |
| 943 | |
| 944 | AddVCallAndVBaseOffsets(BaseSubobject(PrimaryBase, PrimaryBaseOffset), |
| 945 | PrimaryBaseIsVirtual, RealBaseOffset); |
| 946 | } |
| 947 | |
Anders Carlsson | 93b1b49 | 2010-03-02 05:40:45 +0000 | [diff] [blame] | 948 | AddVBaseOffsets(Base.getBase(), RealBaseOffset); |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 949 | |
| 950 | // We only want to add vcall offsets for virtual bases. |
| 951 | if (BaseIsVirtual) |
| 952 | AddVCallOffsets(Base, RealBaseOffset); |
| 953 | } |
| 954 | |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 955 | int64_t VCallAndVBaseOffsetBuilder::getCurrentOffsetOffset() const { |
| 956 | // OffsetIndex is the index of this vcall or vbase offset, relative to the |
| 957 | // vtable address point. (We subtract 3 to account for the information just |
| 958 | // above the address point, the RTTI info, the offset to top, and the |
| 959 | // vcall offset itself). |
| 960 | int64_t OffsetIndex = -(int64_t)(3 + Components.size()); |
| 961 | |
| 962 | // FIXME: We shouldn't use / 8 here. |
| 963 | int64_t OffsetOffset = OffsetIndex * |
| 964 | (int64_t)Context.Target.getPointerWidth(0) / 8; |
| 965 | |
| 966 | return OffsetOffset; |
| 967 | } |
| 968 | |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 969 | void VCallAndVBaseOffsetBuilder::AddVCallOffsets(BaseSubobject Base, |
| 970 | uint64_t VBaseOffset) { |
| 971 | const CXXRecordDecl *RD = Base.getBase(); |
| 972 | const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD); |
| 973 | |
John McCall | 43c6ffb | 2010-02-26 20:22:44 +0000 | [diff] [blame] | 974 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 975 | |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 976 | // Handle the primary base first. |
John McCall | 43c6ffb | 2010-02-26 20:22:44 +0000 | [diff] [blame] | 977 | if (PrimaryBase) { |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 978 | uint64_t PrimaryBaseOffset; |
| 979 | |
| 980 | // Get the base offset of the primary base. |
| 981 | if (Layout.getPrimaryBaseWasVirtual()) { |
| 982 | assert(Layout.getVBaseClassOffset(PrimaryBase) == 0 && |
| 983 | "Primary vbase should have a zero offset!"); |
| 984 | |
| 985 | const ASTRecordLayout &MostDerivedClassLayout = |
| 986 | Context.getASTRecordLayout(MostDerivedClass); |
| 987 | |
| 988 | PrimaryBaseOffset = |
| 989 | MostDerivedClassLayout.getVBaseClassOffset(PrimaryBase); |
| 990 | } else { |
| 991 | assert(Layout.getBaseClassOffset(PrimaryBase) == 0 && |
| 992 | "Primary base should have a zero offset!"); |
| 993 | |
| 994 | PrimaryBaseOffset = Base.getBaseOffset(); |
| 995 | } |
| 996 | |
| 997 | AddVCallOffsets(BaseSubobject(PrimaryBase, PrimaryBaseOffset), |
| 998 | VBaseOffset); |
| 999 | } |
| 1000 | |
| 1001 | // Add the vcall offsets. |
| 1002 | for (CXXRecordDecl::method_iterator I = RD->method_begin(), |
| 1003 | E = RD->method_end(); I != E; ++I) { |
| 1004 | const CXXMethodDecl *MD = *I; |
| 1005 | |
| 1006 | if (!MD->isVirtual()) |
| 1007 | continue; |
| 1008 | |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 1009 | int64_t OffsetOffset = getCurrentOffsetOffset(); |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 1010 | |
| 1011 | // Don't add a vcall offset if we already have one for this member function |
| 1012 | // signature. |
| 1013 | if (!VCallOffsets.AddVCallOffset(MD, OffsetOffset)) |
| 1014 | continue; |
| 1015 | |
| 1016 | int64_t Offset = 0; |
| 1017 | |
| 1018 | if (Overriders) { |
| 1019 | // Get the final overrider. |
| 1020 | FinalOverriders::OverriderInfo Overrider = |
| 1021 | Overriders->getOverrider(Base, MD); |
| 1022 | |
Anders Carlsson | 31f595f | 2010-02-28 00:10:58 +0000 | [diff] [blame] | 1023 | /// The vcall offset is the offset from the virtual base to the object |
| 1024 | /// where the function was overridden. |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 1025 | // FIXME: We should not use / 8 here. |
Anders Carlsson | 6f1f002 | 2010-03-02 03:44:06 +0000 | [diff] [blame] | 1026 | Offset = (int64_t)(Overrider.Offset - VBaseOffset) / 8; |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 1027 | } |
| 1028 | |
| 1029 | Components.push_back(VtableComponent::MakeVCallOffset(Offset)); |
| 1030 | } |
| 1031 | |
| 1032 | // And iterate over all non-virtual bases (ignoring the primary base). |
| 1033 | for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(), |
| 1034 | E = RD->bases_end(); I != E; ++I) { |
| 1035 | |
| 1036 | if (I->isVirtual()) |
| 1037 | continue; |
| 1038 | |
| 1039 | const CXXRecordDecl *BaseDecl = |
| 1040 | cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl()); |
John McCall | 43c6ffb | 2010-02-26 20:22:44 +0000 | [diff] [blame] | 1041 | if (BaseDecl == PrimaryBase) |
| 1042 | continue; |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 1043 | |
| 1044 | // Get the base offset of this base. |
| 1045 | uint64_t BaseOffset = Base.getBaseOffset() + |
| 1046 | Layout.getBaseClassOffset(BaseDecl); |
| 1047 | |
| 1048 | AddVCallOffsets(BaseSubobject(BaseDecl, BaseOffset), VBaseOffset); |
| 1049 | } |
| 1050 | } |
| 1051 | |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 1052 | void VCallAndVBaseOffsetBuilder::AddVBaseOffsets(const CXXRecordDecl *RD, |
Anders Carlsson | 93b1b49 | 2010-03-02 05:40:45 +0000 | [diff] [blame] | 1053 | uint64_t OffsetInLayoutClass) { |
Anders Carlsson | c3f92a1 | 2010-02-27 21:09:00 +0000 | [diff] [blame] | 1054 | const ASTRecordLayout &LayoutClassLayout = |
| 1055 | Context.getASTRecordLayout(LayoutClass); |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 1056 | |
| 1057 | // Add vbase offsets. |
| 1058 | for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(), |
| 1059 | E = RD->bases_end(); I != E; ++I) { |
| 1060 | const CXXRecordDecl *BaseDecl = |
| 1061 | cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl()); |
| 1062 | |
| 1063 | // Check if this is a virtual base that we haven't visited before. |
| 1064 | if (I->isVirtual() && VisitedVirtualBases.insert(BaseDecl)) { |
| 1065 | // FIXME: We shouldn't use / 8 here. |
Anders Carlsson | 93b1b49 | 2010-03-02 05:40:45 +0000 | [diff] [blame] | 1066 | int64_t Offset = |
| 1067 | (int64_t)(LayoutClassLayout.getVBaseClassOffset(BaseDecl) - |
| 1068 | OffsetInLayoutClass) / 8; |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 1069 | |
| 1070 | // Add the vbase offset offset. |
| 1071 | assert(!VBaseOffsetOffsets.count(BaseDecl) && |
| 1072 | "vbase offset offset already exists!"); |
| 1073 | |
| 1074 | int64_t VBaseOffsetOffset = getCurrentOffsetOffset(); |
| 1075 | VBaseOffsetOffsets.insert(std::make_pair(BaseDecl, VBaseOffsetOffset)); |
| 1076 | |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 1077 | Components.push_back(VtableComponent::MakeVBaseOffset(Offset)); |
| 1078 | } |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 1079 | |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 1080 | // Check the base class looking for more vbase offsets. |
Anders Carlsson | 93b1b49 | 2010-03-02 05:40:45 +0000 | [diff] [blame] | 1081 | AddVBaseOffsets(BaseDecl, OffsetInLayoutClass); |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 1082 | } |
| 1083 | } |
| 1084 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1085 | /// VtableBuilder - Class for building vtable layout information. |
Benjamin Kramer | 337e3a5 | 2009-11-28 19:45:26 +0000 | [diff] [blame] | 1086 | class VtableBuilder { |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1087 | public: |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1088 | /// PrimaryBasesSetVectorTy - A set vector of direct and indirect |
| 1089 | /// primary bases. |
| 1090 | typedef llvm::SmallSetVector<const CXXRecordDecl *, 8> |
| 1091 | PrimaryBasesSetVectorTy; |
| 1092 | |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1093 | private: |
Anders Carlsson | cf5a882 | 2010-02-13 21:07:32 +0000 | [diff] [blame] | 1094 | /// VtableInfo - Global vtable information. |
| 1095 | CGVtableInfo &VtableInfo; |
| 1096 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1097 | /// MostDerivedClass - The most derived class for which we're building this |
| 1098 | /// vtable. |
| 1099 | const CXXRecordDecl *MostDerivedClass; |
| 1100 | |
Anders Carlsson | 9391375 | 2010-02-27 20:39:05 +0000 | [diff] [blame] | 1101 | /// MostDerivedClassOffset - If we're building a construction vtable, this |
| 1102 | /// holds the offset from the layout class to the most derived class. |
| 1103 | const uint64_t MostDerivedClassOffset; |
| 1104 | |
Anders Carlsson | 62c6c72 | 2010-02-28 00:36:23 +0000 | [diff] [blame] | 1105 | /// MostDerivedClassIsVirtual - Whether the most derived class is a virtual |
| 1106 | /// base. (This only makes sense when building a construction vtable). |
| 1107 | bool MostDerivedClassIsVirtual; |
| 1108 | |
Anders Carlsson | 9391375 | 2010-02-27 20:39:05 +0000 | [diff] [blame] | 1109 | /// LayoutClass - The class we're using for layout information. Will be |
| 1110 | /// different than the most derived class if we're building a construction |
| 1111 | /// vtable. |
| 1112 | const CXXRecordDecl *LayoutClass; |
| 1113 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1114 | /// Context - The ASTContext which we will use for layout information. |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1115 | ASTContext &Context; |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1116 | |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 1117 | /// FinalOverriders - The final overriders of the most derived class. |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 1118 | const FinalOverriders Overriders; |
Anders Carlsson | e8ac42a | 2010-02-11 21:24:32 +0000 | [diff] [blame] | 1119 | |
Anders Carlsson | 9e3b3a3 | 2010-02-25 22:23:13 +0000 | [diff] [blame] | 1120 | /// VCallOffsetsForVBases - Keeps track of vcall offsets for the virtual |
| 1121 | /// bases in this vtable. |
| 1122 | llvm::DenseMap<const CXXRecordDecl *, VCallOffsetMap> VCallOffsetsForVBases; |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 1123 | |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 1124 | typedef llvm::DenseMap<const CXXRecordDecl *, int64_t> |
| 1125 | VBaseOffsetOffsetsMapTy; |
| 1126 | |
| 1127 | /// VBaseOffsetOffsets - Contains the offsets of the virtual base offsets for |
| 1128 | /// the most derived class. |
| 1129 | VBaseOffsetOffsetsMapTy VBaseOffsetOffsets; |
| 1130 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1131 | /// Components - The components of the vtable being built. |
| 1132 | llvm::SmallVector<VtableComponent, 64> Components; |
| 1133 | |
Anders Carlsson | 932c2f2 | 2010-02-11 17:18:51 +0000 | [diff] [blame] | 1134 | /// AddressPoints - Address points for the vtable being built. |
| 1135 | CGVtableInfo::AddressPointsMapTy AddressPoints; |
| 1136 | |
Anders Carlsson | d3adb0c | 2010-02-13 23:40:17 +0000 | [diff] [blame] | 1137 | /// ReturnAdjustment - A return adjustment. |
Anders Carlsson | 5272c25 | 2010-02-12 17:37:14 +0000 | [diff] [blame] | 1138 | struct ReturnAdjustment { |
| 1139 | /// NonVirtual - The non-virtual adjustment from the derived object to its |
| 1140 | /// nearest virtual base. |
| 1141 | int64_t NonVirtual; |
| 1142 | |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 1143 | /// VBaseOffsetOffset - The offset (in bytes), relative to the address point |
Anders Carlsson | cf5a882 | 2010-02-13 21:07:32 +0000 | [diff] [blame] | 1144 | /// of the virtual base class offset. |
| 1145 | int64_t VBaseOffsetOffset; |
Anders Carlsson | 5272c25 | 2010-02-12 17:37:14 +0000 | [diff] [blame] | 1146 | |
Anders Carlsson | cf5a882 | 2010-02-13 21:07:32 +0000 | [diff] [blame] | 1147 | ReturnAdjustment() : NonVirtual(0), VBaseOffsetOffset(0) { } |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1148 | |
Anders Carlsson | cf5a882 | 2010-02-13 21:07:32 +0000 | [diff] [blame] | 1149 | bool isEmpty() const { return !NonVirtual && !VBaseOffsetOffset; } |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1150 | }; |
| 1151 | |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1152 | /// MethodInfo - Contains information about a method in a vtable. |
| 1153 | /// (Used for computing 'this' pointer adjustment thunks. |
| 1154 | struct MethodInfo { |
| 1155 | /// BaseOffset - The base offset of this method. |
| 1156 | const uint64_t BaseOffset; |
| 1157 | |
Anders Carlsson | 423406f3 | 2010-03-10 21:25:37 +0000 | [diff] [blame] | 1158 | /// BaseOffsetInLayoutClass - The base offset in the layout class of this |
| 1159 | /// method. |
| 1160 | const uint64_t BaseOffsetInLayoutClass; |
| 1161 | |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1162 | /// VtableIndex - The index in the vtable that this method has. |
| 1163 | /// (For destructors, this is the index of the complete destructor). |
| 1164 | const uint64_t VtableIndex; |
| 1165 | |
Anders Carlsson | 423406f3 | 2010-03-10 21:25:37 +0000 | [diff] [blame] | 1166 | MethodInfo(uint64_t BaseOffset, uint64_t BaseOffsetInLayoutClass, |
| 1167 | uint64_t VtableIndex) |
| 1168 | : BaseOffset(BaseOffset), |
| 1169 | BaseOffsetInLayoutClass(BaseOffsetInLayoutClass), |
| 1170 | VtableIndex(VtableIndex) { } |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1171 | |
Anders Carlsson | 423406f3 | 2010-03-10 21:25:37 +0000 | [diff] [blame] | 1172 | MethodInfo() : BaseOffset(0), BaseOffsetInLayoutClass(0), VtableIndex(0) { } |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1173 | }; |
| 1174 | |
| 1175 | typedef llvm::DenseMap<const CXXMethodDecl *, MethodInfo> MethodInfoMapTy; |
| 1176 | |
| 1177 | /// MethodInfoMap - The information for all methods in the vtable we're |
| 1178 | /// currently building. |
| 1179 | MethodInfoMapTy MethodInfoMap; |
| 1180 | |
Anders Carlsson | d3adb0c | 2010-02-13 23:40:17 +0000 | [diff] [blame] | 1181 | /// ThisAdjustment - A 'this' pointer adjustment thunk. |
| 1182 | struct ThisAdjustment { |
| 1183 | /// NonVirtual - The non-virtual adjustment from the derived object to its |
| 1184 | /// nearest virtual base. |
| 1185 | int64_t NonVirtual; |
| 1186 | |
John McCall | 43c6ffb | 2010-02-26 20:22:44 +0000 | [diff] [blame] | 1187 | /// VCallOffsetOffset - The offset (in bytes), relative to the address point, |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 1188 | /// of the virtual call offset. |
| 1189 | int64_t VCallOffsetOffset; |
Anders Carlsson | d3adb0c | 2010-02-13 23:40:17 +0000 | [diff] [blame] | 1190 | |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 1191 | ThisAdjustment() : NonVirtual(0), VCallOffsetOffset(0) { } |
Anders Carlsson | d3adb0c | 2010-02-13 23:40:17 +0000 | [diff] [blame] | 1192 | |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 1193 | bool isEmpty() const { return !NonVirtual && !VCallOffsetOffset; } |
Anders Carlsson | d3adb0c | 2010-02-13 23:40:17 +0000 | [diff] [blame] | 1194 | }; |
| 1195 | |
Anders Carlsson | 8a24029 | 2010-03-12 04:54:20 +0000 | [diff] [blame] | 1196 | /// ThunkInfo - The 'this' pointer adjustment as well as an optional return |
| 1197 | /// adjustment for a thunk. |
| 1198 | struct ThunkInfo { |
| 1199 | /// This - The 'this' pointer adjustment. |
| 1200 | ThisAdjustment This; |
| 1201 | |
| 1202 | /// Return - The return adjustment. |
| 1203 | ReturnAdjustment Return; |
| 1204 | |
| 1205 | ThunkInfo() { } |
| 1206 | |
| 1207 | ThunkInfo(const ThisAdjustment &This, const ReturnAdjustment &Return) |
| 1208 | : This(This), Return(Return) { } |
| 1209 | |
| 1210 | bool isEmpty() const { return This.isEmpty() && Return.isEmpty(); } |
| 1211 | }; |
| 1212 | |
| 1213 | typedef llvm::DenseMap<uint64_t, ThunkInfo> ThunksInfoMapTy; |
| 1214 | |
| 1215 | /// Thunks - The thunks by vtable index in the vtable currently being built. |
| 1216 | ThunksInfoMapTy Thunks; |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1217 | |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1218 | /// ComputeThisAdjustments - Compute the 'this' pointer adjustments for the |
| 1219 | /// part of the vtable we're currently building. |
| 1220 | void ComputeThisAdjustments(); |
| 1221 | |
Anders Carlsson | dc2dba3 | 2010-02-16 04:49:44 +0000 | [diff] [blame] | 1222 | typedef llvm::SmallPtrSet<const CXXRecordDecl *, 4> VisitedVirtualBasesSetTy; |
| 1223 | |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1224 | /// PrimaryVirtualBases - All known virtual bases who are a primary base of |
Anders Carlsson | 0570f71 | 2010-02-23 03:48:14 +0000 | [diff] [blame] | 1225 | /// some other base. |
| 1226 | VisitedVirtualBasesSetTy PrimaryVirtualBases; |
| 1227 | |
Anders Carlsson | cf5a882 | 2010-02-13 21:07:32 +0000 | [diff] [blame] | 1228 | /// ComputeReturnAdjustment - Compute the return adjustment given a return |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1229 | /// adjustment base offset. |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 1230 | ReturnAdjustment ComputeReturnAdjustment(BaseOffset Offset); |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1231 | |
Anders Carlsson | 9f19aaaa | 2010-02-27 19:57:44 +0000 | [diff] [blame] | 1232 | /// ComputeThisAdjustmentBaseOffset - Compute the base offset for adjusting |
| 1233 | /// the 'this' pointer from the base subobject to the derived subobject. |
| 1234 | BaseOffset ComputeThisAdjustmentBaseOffset(BaseSubobject Base, |
| 1235 | BaseSubobject Derived) const; |
| 1236 | |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 1237 | /// ComputeThisAdjustment - Compute the 'this' pointer adjustment for the |
| 1238 | /// given virtual member function and the 'this' pointer adjustment base |
| 1239 | /// offset. |
| 1240 | ThisAdjustment ComputeThisAdjustment(const CXXMethodDecl *MD, |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 1241 | BaseOffset Offset); |
Anders Carlsson | d3adb0c | 2010-02-13 23:40:17 +0000 | [diff] [blame] | 1242 | |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1243 | /// AddMethod - Add a single virtual member function to the vtable |
| 1244 | /// components vector. |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1245 | void AddMethod(const CXXMethodDecl *MD, ReturnAdjustment ReturnAdjustment); |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1246 | |
Anders Carlsson | a8796c6 | 2010-02-23 04:26:39 +0000 | [diff] [blame] | 1247 | /// IsOverriderUsed - Returns whether the overrider will ever be used in this |
| 1248 | /// part of the vtable. |
| 1249 | /// |
| 1250 | /// Itanium C++ ABI 2.5.2: |
| 1251 | /// |
| 1252 | /// struct A { virtual void f(); }; |
| 1253 | /// struct B : virtual public A { int i; }; |
| 1254 | /// struct C : virtual public A { int j; }; |
| 1255 | /// struct D : public B, public C {}; |
| 1256 | /// |
| 1257 | /// When B and C are declared, A is a primary base in each case, so although |
| 1258 | /// vcall offsets are allocated in the A-in-B and A-in-C vtables, no this |
| 1259 | /// adjustment is required and no thunk is generated. However, inside D |
| 1260 | /// objects, A is no longer a primary base of C, so if we allowed calls to |
| 1261 | /// C::f() to use the copy of A's vtable in the C subobject, we would need |
| 1262 | /// to adjust this from C* to B::A*, which would require a third-party |
| 1263 | /// thunk. Since we require that a call to C::f() first convert to A*, |
| 1264 | /// C-in-D's copy of A's vtable is never referenced, so this is not |
| 1265 | /// necessary. |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1266 | bool IsOverriderUsed(const CXXMethodDecl *Overrider, |
| 1267 | uint64_t BaseOffsetInLayoutClass, |
| 1268 | const CXXRecordDecl *FirstBaseInPrimaryBaseChain, |
| 1269 | uint64_t FirstBaseOffsetInLayoutClass) const; |
| 1270 | |
Anders Carlsson | a8796c6 | 2010-02-23 04:26:39 +0000 | [diff] [blame] | 1271 | |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1272 | /// AddMethods - Add the methods of this base subobject and all its |
| 1273 | /// primary bases to the vtable components vector. |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1274 | void AddMethods(BaseSubobject Base, uint64_t BaseOffsetInLayoutClass, |
| 1275 | const CXXRecordDecl *FirstBaseInPrimaryBaseChain, |
| 1276 | uint64_t FirstBaseOffsetInLayoutClass, |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1277 | PrimaryBasesSetVectorTy &PrimaryBases); |
Anders Carlsson | b716a54 | 2010-02-16 16:26:28 +0000 | [diff] [blame] | 1278 | |
Anders Carlsson | 62c6c72 | 2010-02-28 00:36:23 +0000 | [diff] [blame] | 1279 | // LayoutVtable - Layout the vtable for the given base class, including its |
Anders Carlsson | b716a54 | 2010-02-16 16:26:28 +0000 | [diff] [blame] | 1280 | // secondary vtables and any vtables for virtual bases. |
| 1281 | void LayoutVtable(); |
| 1282 | |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1283 | /// LayoutPrimaryAndSecondaryVtables - Layout the primary vtable for the |
Anders Carlsson | b716a54 | 2010-02-16 16:26:28 +0000 | [diff] [blame] | 1284 | /// given base subobject, as well as all its secondary vtables. |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1285 | void LayoutPrimaryAndSecondaryVtables(BaseSubobject Base, |
| 1286 | bool BaseIsVirtual, |
| 1287 | uint64_t OffsetInLayoutClass); |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1288 | |
Anders Carlsson | 1415793 | 2010-02-16 16:02:57 +0000 | [diff] [blame] | 1289 | /// LayoutSecondaryVtables - Layout the secondary vtables for the given base |
| 1290 | /// subobject. |
Anders Carlsson | 115b475 | 2010-03-10 19:39:11 +0000 | [diff] [blame] | 1291 | /// |
| 1292 | /// \param BaseIsMorallyVirtual whether the base subobject is a virtual base |
| 1293 | /// or a direct or indirect base of a virtual base. |
| 1294 | void LayoutSecondaryVtables(BaseSubobject Base, bool BaseIsMorallyVirtual, |
| 1295 | uint64_t OffsetInLayoutClass); |
Anders Carlsson | b08aaa3 | 2010-02-27 04:05:52 +0000 | [diff] [blame] | 1296 | |
| 1297 | /// DeterminePrimaryVirtualBases - Determine the primary virtual bases in this |
| 1298 | /// class hierarchy. |
| 1299 | void DeterminePrimaryVirtualBases(const CXXRecordDecl *RD, |
Anders Carlsson | 02b99d6 | 2010-03-10 03:02:01 +0000 | [diff] [blame] | 1300 | uint64_t OffsetInLayoutClass, |
Anders Carlsson | b08aaa3 | 2010-02-27 04:05:52 +0000 | [diff] [blame] | 1301 | VisitedVirtualBasesSetTy &VBases); |
| 1302 | |
Anders Carlsson | 13f0f66 | 2010-02-16 16:49:35 +0000 | [diff] [blame] | 1303 | /// LayoutVtablesForVirtualBases - Layout vtables for all virtual bases of the |
| 1304 | /// given base (excluding any primary bases). |
| 1305 | void LayoutVtablesForVirtualBases(const CXXRecordDecl *RD, |
| 1306 | VisitedVirtualBasesSetTy &VBases); |
| 1307 | |
Anders Carlsson | 31f595f | 2010-02-28 00:10:58 +0000 | [diff] [blame] | 1308 | /// isBuildingConstructionVtable - Return whether this vtable builder is |
| 1309 | /// building a construction vtable. |
| 1310 | bool isBuildingConstructorVtable() const { |
| 1311 | return MostDerivedClass != LayoutClass; |
| 1312 | } |
| 1313 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1314 | public: |
Anders Carlsson | 9391375 | 2010-02-27 20:39:05 +0000 | [diff] [blame] | 1315 | VtableBuilder(CGVtableInfo &VtableInfo, const CXXRecordDecl *MostDerivedClass, |
Anders Carlsson | 62c6c72 | 2010-02-28 00:36:23 +0000 | [diff] [blame] | 1316 | uint64_t MostDerivedClassOffset, bool MostDerivedClassIsVirtual, |
Anders Carlsson | 9391375 | 2010-02-27 20:39:05 +0000 | [diff] [blame] | 1317 | const CXXRecordDecl *LayoutClass) |
| 1318 | : VtableInfo(VtableInfo), MostDerivedClass(MostDerivedClass), |
Anders Carlsson | 62c6c72 | 2010-02-28 00:36:23 +0000 | [diff] [blame] | 1319 | MostDerivedClassOffset(MostDerivedClassOffset), |
| 1320 | MostDerivedClassIsVirtual(MostDerivedClassIsVirtual), |
| 1321 | LayoutClass(LayoutClass), Context(MostDerivedClass->getASTContext()), |
Anders Carlsson | ca82a4f | 2010-03-10 02:33:41 +0000 | [diff] [blame] | 1322 | Overriders(MostDerivedClass, MostDerivedClassOffset, LayoutClass) { |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1323 | |
Anders Carlsson | b716a54 | 2010-02-16 16:26:28 +0000 | [diff] [blame] | 1324 | LayoutVtable(); |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1325 | } |
| 1326 | |
| 1327 | /// dumpLayout - Dump the vtable layout. |
| 1328 | void dumpLayout(llvm::raw_ostream&); |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1329 | }; |
| 1330 | |
Anders Carlsson | d202541 | 2010-02-27 06:38:03 +0000 | [diff] [blame] | 1331 | /// OverridesMethodInBases - Checks whether whether this virtual member |
| 1332 | /// function overrides a member function in any of the given bases. |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1333 | /// Returns the overridden member function, or null if none was found. |
| 1334 | static const CXXMethodDecl * |
Anders Carlsson | d202541 | 2010-02-27 06:38:03 +0000 | [diff] [blame] | 1335 | OverridesMethodInBases(const CXXMethodDecl *MD, |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1336 | VtableBuilder::PrimaryBasesSetVectorTy &Bases) { |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1337 | for (CXXMethodDecl::method_iterator I = MD->begin_overridden_methods(), |
| 1338 | E = MD->end_overridden_methods(); I != E; ++I) { |
| 1339 | const CXXMethodDecl *OverriddenMD = *I; |
| 1340 | const CXXRecordDecl *OverriddenRD = OverriddenMD->getParent(); |
| 1341 | assert(OverriddenMD->isCanonicalDecl() && |
| 1342 | "Should have the canonical decl of the overridden RD!"); |
| 1343 | |
Anders Carlsson | d202541 | 2010-02-27 06:38:03 +0000 | [diff] [blame] | 1344 | if (Bases.count(OverriddenRD)) |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1345 | return OverriddenMD; |
| 1346 | } |
| 1347 | |
| 1348 | return 0; |
| 1349 | } |
| 1350 | |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1351 | void VtableBuilder::ComputeThisAdjustments() { |
| 1352 | // Now go through the method info map and see if any of the methods need |
| 1353 | // 'this' pointer adjustments. |
| 1354 | for (MethodInfoMapTy::const_iterator I = MethodInfoMap.begin(), |
| 1355 | E = MethodInfoMap.end(); I != E; ++I) { |
| 1356 | const CXXMethodDecl *MD = I->first; |
| 1357 | const MethodInfo &MethodInfo = I->second; |
| 1358 | |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1359 | // Get the final overrider for this method. |
| 1360 | FinalOverriders::OverriderInfo Overrider = |
Anders Carlsson | 423406f3 | 2010-03-10 21:25:37 +0000 | [diff] [blame] | 1361 | Overriders.getOverrider(BaseSubobject(MD->getParent(), |
| 1362 | MethodInfo.BaseOffset), MD); |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1363 | |
| 1364 | // Check if we need an adjustment. |
Anders Carlsson | 423406f3 | 2010-03-10 21:25:37 +0000 | [diff] [blame] | 1365 | if (Overrider.Offset == MethodInfo.BaseOffsetInLayoutClass) |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1366 | continue; |
| 1367 | |
Anders Carlsson | 01d3c7d | 2010-02-27 18:09:40 +0000 | [diff] [blame] | 1368 | uint64_t VtableIndex = MethodInfo.VtableIndex; |
Anders Carlsson | 2b381bb | 2010-02-27 18:16:50 +0000 | [diff] [blame] | 1369 | |
| 1370 | // Ignore adjustments for pure virtual member functions. |
| 1371 | if (Overrider.Method->isPure()) |
| 1372 | continue; |
| 1373 | |
| 1374 | // Ignore adjustments for unused function pointers. |
Anders Carlsson | 01d3c7d | 2010-02-27 18:09:40 +0000 | [diff] [blame] | 1375 | if (Components[VtableIndex].getKind() == |
| 1376 | VtableComponent::CK_UnusedFunctionPointer) |
| 1377 | continue; |
| 1378 | |
Anders Carlsson | 423406f3 | 2010-03-10 21:25:37 +0000 | [diff] [blame] | 1379 | BaseSubobject OverriddenBaseSubobject(MD->getParent(), |
| 1380 | MethodInfo.BaseOffsetInLayoutClass); |
| 1381 | |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1382 | BaseSubobject OverriderBaseSubobject(Overrider.Method->getParent(), |
Anders Carlsson | 423406f3 | 2010-03-10 21:25:37 +0000 | [diff] [blame] | 1383 | Overrider.Offset); |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1384 | |
| 1385 | // Compute the adjustment offset. |
| 1386 | BaseOffset ThisAdjustmentOffset = |
Anders Carlsson | 9f19aaaa | 2010-02-27 19:57:44 +0000 | [diff] [blame] | 1387 | ComputeThisAdjustmentBaseOffset(OverriddenBaseSubobject, |
| 1388 | OverriderBaseSubobject); |
| 1389 | |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1390 | // Then compute the adjustment itself. |
| 1391 | ThisAdjustment ThisAdjustment = ComputeThisAdjustment(Overrider.Method, |
| 1392 | ThisAdjustmentOffset); |
| 1393 | |
Anders Carlsson | 01d3c7d | 2010-02-27 18:09:40 +0000 | [diff] [blame] | 1394 | // Add it. |
Anders Carlsson | 8a24029 | 2010-03-12 04:54:20 +0000 | [diff] [blame] | 1395 | Thunks[VtableIndex].This = ThisAdjustment; |
Anders Carlsson | 01d3c7d | 2010-02-27 18:09:40 +0000 | [diff] [blame] | 1396 | |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1397 | if (isa<CXXDestructorDecl>(MD)) { |
| 1398 | // Add an adjustment for the deleting destructor as well. |
Anders Carlsson | 8a24029 | 2010-03-12 04:54:20 +0000 | [diff] [blame] | 1399 | Thunks[VtableIndex + 1].This = ThisAdjustment; |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1400 | } |
| 1401 | } |
| 1402 | |
| 1403 | /// Clear the method info map. |
| 1404 | MethodInfoMap.clear(); |
| 1405 | } |
| 1406 | |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1407 | VtableBuilder::ReturnAdjustment |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 1408 | VtableBuilder::ComputeReturnAdjustment(BaseOffset Offset) { |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1409 | ReturnAdjustment Adjustment; |
| 1410 | |
| 1411 | if (!Offset.isEmpty()) { |
Anders Carlsson | cf5a882 | 2010-02-13 21:07:32 +0000 | [diff] [blame] | 1412 | if (Offset.VirtualBase) { |
| 1413 | // Get the virtual base offset offset. |
Anders Carlsson | e442488 | 2010-03-11 07:00:45 +0000 | [diff] [blame] | 1414 | if (Offset.DerivedClass == MostDerivedClass) { |
| 1415 | // We can get the offset offset directly from our map. |
| 1416 | Adjustment.VBaseOffsetOffset = |
| 1417 | VBaseOffsetOffsets.lookup(Offset.VirtualBase); |
| 1418 | } else { |
| 1419 | Adjustment.VBaseOffsetOffset = |
Anders Carlsson | 4cbe83c | 2010-03-11 07:15:17 +0000 | [diff] [blame] | 1420 | VtableInfo.getVirtualBaseOffsetOffset(Offset.DerivedClass, |
| 1421 | Offset.VirtualBase); |
Anders Carlsson | e442488 | 2010-03-11 07:00:45 +0000 | [diff] [blame] | 1422 | } |
| 1423 | |
Anders Carlsson | dd819c9 | 2010-03-11 16:06:20 +0000 | [diff] [blame] | 1424 | // FIXME: Once the assert in getVirtualBaseOffsetOffset is back again, |
Anders Carlsson | cf5a882 | 2010-02-13 21:07:32 +0000 | [diff] [blame] | 1425 | // we can get rid of this assert. |
| 1426 | assert(Adjustment.VBaseOffsetOffset != 0 && |
Anders Carlsson | dd819c9 | 2010-03-11 16:06:20 +0000 | [diff] [blame] | 1427 | "Invalid vbase offset offset!"); |
Anders Carlsson | cf5a882 | 2010-02-13 21:07:32 +0000 | [diff] [blame] | 1428 | } |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1429 | |
| 1430 | Adjustment.NonVirtual = Offset.NonVirtualOffset; |
| 1431 | } |
| 1432 | |
| 1433 | return Adjustment; |
| 1434 | } |
| 1435 | |
Anders Carlsson | 9f19aaaa | 2010-02-27 19:57:44 +0000 | [diff] [blame] | 1436 | BaseOffset |
| 1437 | VtableBuilder::ComputeThisAdjustmentBaseOffset(BaseSubobject Base, |
| 1438 | BaseSubobject Derived) const { |
| 1439 | const CXXRecordDecl *BaseRD = Base.getBase(); |
| 1440 | const CXXRecordDecl *DerivedRD = Derived.getBase(); |
| 1441 | |
| 1442 | CXXBasePaths Paths(/*FindAmbiguities=*/true, |
| 1443 | /*RecordPaths=*/true, /*DetectVirtual=*/true); |
| 1444 | |
| 1445 | if (!const_cast<CXXRecordDecl *>(DerivedRD)-> |
| 1446 | isDerivedFrom(const_cast<CXXRecordDecl *>(BaseRD), Paths)) { |
| 1447 | assert(false && "Class must be derived from the passed in base class!"); |
| 1448 | return BaseOffset(); |
| 1449 | } |
| 1450 | |
| 1451 | // We have to go through all the paths, and see which one leads us to the |
| 1452 | // right base subobject. |
| 1453 | for (CXXBasePaths::const_paths_iterator I = Paths.begin(), E = Paths.end(); |
| 1454 | I != E; ++I) { |
| 1455 | BaseOffset Offset = ComputeBaseOffset(Context, DerivedRD, *I); |
| 1456 | |
| 1457 | // FIXME: Should not use * 8 here. |
| 1458 | uint64_t OffsetToBaseSubobject = Offset.NonVirtualOffset * 8; |
| 1459 | |
| 1460 | if (Offset.VirtualBase) { |
| 1461 | // If we have a virtual base class, the non-virtual offset is relative |
| 1462 | // to the virtual base class offset. |
Anders Carlsson | 423406f3 | 2010-03-10 21:25:37 +0000 | [diff] [blame] | 1463 | const ASTRecordLayout &LayoutClassLayout = |
| 1464 | Context.getASTRecordLayout(LayoutClass); |
Anders Carlsson | 9f19aaaa | 2010-02-27 19:57:44 +0000 | [diff] [blame] | 1465 | |
| 1466 | /// Get the virtual base offset, relative to the most derived class |
| 1467 | /// layout. |
| 1468 | OffsetToBaseSubobject += |
Anders Carlsson | 423406f3 | 2010-03-10 21:25:37 +0000 | [diff] [blame] | 1469 | LayoutClassLayout.getVBaseClassOffset(Offset.VirtualBase); |
Anders Carlsson | 9f19aaaa | 2010-02-27 19:57:44 +0000 | [diff] [blame] | 1470 | } else { |
| 1471 | // Otherwise, the non-virtual offset is relative to the derived class |
| 1472 | // offset. |
| 1473 | OffsetToBaseSubobject += Derived.getBaseOffset(); |
| 1474 | } |
| 1475 | |
| 1476 | // Check if this path gives us the right base subobject. |
| 1477 | if (OffsetToBaseSubobject == Base.getBaseOffset()) { |
| 1478 | // Since we're going from the base class _to_ the derived class, we'll |
| 1479 | // invert the non-virtual offset here. |
| 1480 | Offset.NonVirtualOffset = -Offset.NonVirtualOffset; |
| 1481 | return Offset; |
| 1482 | } |
| 1483 | } |
| 1484 | |
| 1485 | return BaseOffset(); |
| 1486 | } |
| 1487 | |
| 1488 | |
Anders Carlsson | d3adb0c | 2010-02-13 23:40:17 +0000 | [diff] [blame] | 1489 | VtableBuilder::ThisAdjustment |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 1490 | VtableBuilder::ComputeThisAdjustment(const CXXMethodDecl *MD, |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 1491 | BaseOffset Offset) { |
Anders Carlsson | d3adb0c | 2010-02-13 23:40:17 +0000 | [diff] [blame] | 1492 | ThisAdjustment Adjustment; |
| 1493 | |
| 1494 | if (!Offset.isEmpty()) { |
Anders Carlsson | 8847d9e | 2010-02-18 17:26:40 +0000 | [diff] [blame] | 1495 | if (Offset.VirtualBase) { |
Anders Carlsson | 9e3b3a3 | 2010-02-25 22:23:13 +0000 | [diff] [blame] | 1496 | // Get the vcall offset map for this virtual base. |
| 1497 | VCallOffsetMap &VCallOffsets = VCallOffsetsForVBases[Offset.VirtualBase]; |
| 1498 | |
| 1499 | if (VCallOffsets.empty()) { |
| 1500 | // We don't have vcall offsets for this virtual base, go ahead and |
| 1501 | // build them. |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1502 | VCallAndVBaseOffsetBuilder Builder(MostDerivedClass, MostDerivedClass, |
| 1503 | /*FinalOverriders=*/0, |
| 1504 | BaseSubobject(Offset.VirtualBase, 0), |
| 1505 | /*BaseIsVirtual=*/true, |
| 1506 | /*OffsetInLayoutClass=*/0); |
Anders Carlsson | 9e3b3a3 | 2010-02-25 22:23:13 +0000 | [diff] [blame] | 1507 | |
| 1508 | VCallOffsets = Builder.getVCallOffsets(); |
| 1509 | } |
| 1510 | |
Anders Carlsson | 8847d9e | 2010-02-18 17:26:40 +0000 | [diff] [blame] | 1511 | Adjustment.VCallOffsetOffset = VCallOffsets.getVCallOffsetOffset(MD); |
| 1512 | } |
| 1513 | |
Anders Carlsson | d3adb0c | 2010-02-13 23:40:17 +0000 | [diff] [blame] | 1514 | Adjustment.NonVirtual = Offset.NonVirtualOffset; |
| 1515 | } |
| 1516 | |
| 1517 | return Adjustment; |
| 1518 | } |
| 1519 | |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1520 | void |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1521 | VtableBuilder::AddMethod(const CXXMethodDecl *MD, |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1522 | ReturnAdjustment ReturnAdjustment) { |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1523 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(MD)) { |
| 1524 | assert(ReturnAdjustment.isEmpty() && |
| 1525 | "Destructor can't have return adjustment!"); |
Anders Carlsson | d3adb0c | 2010-02-13 23:40:17 +0000 | [diff] [blame] | 1526 | |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1527 | // Add both the complete destructor and the deleting destructor. |
| 1528 | Components.push_back(VtableComponent::MakeCompleteDtor(DD)); |
| 1529 | Components.push_back(VtableComponent::MakeDeletingDtor(DD)); |
| 1530 | } else { |
| 1531 | // Add the return adjustment if necessary. |
| 1532 | if (!ReturnAdjustment.isEmpty()) |
Anders Carlsson | 8a24029 | 2010-03-12 04:54:20 +0000 | [diff] [blame] | 1533 | Thunks[Components.size()].Return = ReturnAdjustment; |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1534 | |
| 1535 | // Add the function. |
| 1536 | Components.push_back(VtableComponent::MakeFunction(MD)); |
| 1537 | } |
| 1538 | } |
| 1539 | |
Anders Carlsson | d202541 | 2010-02-27 06:38:03 +0000 | [diff] [blame] | 1540 | /// OverridesIndirectMethodInBase - Return whether the given member function |
| 1541 | /// overrides any methods in the set of given bases. |
| 1542 | /// Unlike OverridesMethodInBase, this checks "overriders of overriders". |
| 1543 | /// For example, if we have: |
| 1544 | /// |
| 1545 | /// struct A { virtual void f(); } |
| 1546 | /// struct B : A { virtual void f(); } |
| 1547 | /// struct C : B { virtual void f(); } |
| 1548 | /// |
| 1549 | /// OverridesIndirectMethodInBase will return true if given C::f as the method |
| 1550 | /// and { A } as the set of bases. |
| 1551 | static bool |
| 1552 | OverridesIndirectMethodInBases(const CXXMethodDecl *MD, |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1553 | VtableBuilder::PrimaryBasesSetVectorTy &Bases) { |
Anders Carlsson | d202541 | 2010-02-27 06:38:03 +0000 | [diff] [blame] | 1554 | for (CXXMethodDecl::method_iterator I = MD->begin_overridden_methods(), |
| 1555 | E = MD->end_overridden_methods(); I != E; ++I) { |
| 1556 | const CXXMethodDecl *OverriddenMD = *I; |
| 1557 | const CXXRecordDecl *OverriddenRD = OverriddenMD->getParent(); |
| 1558 | assert(OverriddenMD->isCanonicalDecl() && |
| 1559 | "Should have the canonical decl of the overridden RD!"); |
| 1560 | |
| 1561 | if (Bases.count(OverriddenRD)) |
| 1562 | return true; |
| 1563 | |
| 1564 | // Check "indirect overriders". |
| 1565 | if (OverridesIndirectMethodInBases(OverriddenMD, Bases)) |
| 1566 | return true; |
| 1567 | } |
| 1568 | |
| 1569 | return false; |
| 1570 | } |
| 1571 | |
Anders Carlsson | a8796c6 | 2010-02-23 04:26:39 +0000 | [diff] [blame] | 1572 | bool |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1573 | VtableBuilder::IsOverriderUsed(const CXXMethodDecl *Overrider, |
| 1574 | uint64_t BaseOffsetInLayoutClass, |
| 1575 | const CXXRecordDecl *FirstBaseInPrimaryBaseChain, |
| 1576 | uint64_t FirstBaseOffsetInLayoutClass) const { |
Anders Carlsson | a8796c6 | 2010-02-23 04:26:39 +0000 | [diff] [blame] | 1577 | // If the base and the first base in the primary base chain have the same |
| 1578 | // offsets, then this overrider will be used. |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1579 | if (BaseOffsetInLayoutClass == FirstBaseOffsetInLayoutClass) |
Anders Carlsson | 8939e40 | 2010-02-23 06:34:44 +0000 | [diff] [blame] | 1580 | return true; |
| 1581 | |
| 1582 | // We know now that Base (or a direct or indirect base of it) is a primary |
| 1583 | // base in part of the class hierarchy, but not a primary base in the most |
| 1584 | // derived class. |
| 1585 | |
| 1586 | // If the overrider is the first base in the primary base chain, we know |
| 1587 | // that the overrider will be used. |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1588 | if (Overrider->getParent() == FirstBaseInPrimaryBaseChain) |
Anders Carlsson | a8796c6 | 2010-02-23 04:26:39 +0000 | [diff] [blame] | 1589 | return true; |
| 1590 | |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1591 | VtableBuilder::PrimaryBasesSetVectorTy PrimaryBases; |
Anders Carlsson | 8939e40 | 2010-02-23 06:34:44 +0000 | [diff] [blame] | 1592 | |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1593 | const CXXRecordDecl *RD = FirstBaseInPrimaryBaseChain; |
Anders Carlsson | 8939e40 | 2010-02-23 06:34:44 +0000 | [diff] [blame] | 1594 | PrimaryBases.insert(RD); |
| 1595 | |
| 1596 | // Now traverse the base chain, starting with the first base, until we find |
| 1597 | // the base that is no longer a primary base. |
| 1598 | while (true) { |
| 1599 | const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD); |
| 1600 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 1601 | |
| 1602 | if (!PrimaryBase) |
| 1603 | break; |
| 1604 | |
| 1605 | if (Layout.getPrimaryBaseWasVirtual()) { |
| 1606 | assert(Layout.getVBaseClassOffset(PrimaryBase) == 0 && |
| 1607 | "Primary base should always be at offset 0!"); |
| 1608 | |
Anders Carlsson | 7162ab9 | 2010-02-28 18:37:33 +0000 | [diff] [blame] | 1609 | const ASTRecordLayout &LayoutClassLayout = |
| 1610 | Context.getASTRecordLayout(LayoutClass); |
Anders Carlsson | 8939e40 | 2010-02-23 06:34:44 +0000 | [diff] [blame] | 1611 | |
| 1612 | // Now check if this is the primary base that is not a primary base in the |
| 1613 | // most derived class. |
Anders Carlsson | 7162ab9 | 2010-02-28 18:37:33 +0000 | [diff] [blame] | 1614 | if (LayoutClassLayout.getVBaseClassOffset(PrimaryBase) != |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1615 | FirstBaseOffsetInLayoutClass) { |
Anders Carlsson | 8939e40 | 2010-02-23 06:34:44 +0000 | [diff] [blame] | 1616 | // We found it, stop walking the chain. |
| 1617 | break; |
| 1618 | } |
| 1619 | } else { |
| 1620 | assert(Layout.getBaseClassOffset(PrimaryBase) == 0 && |
| 1621 | "Primary base should always be at offset 0!"); |
| 1622 | } |
Anders Carlsson | 01d3c7d | 2010-02-27 18:09:40 +0000 | [diff] [blame] | 1623 | |
Anders Carlsson | b26c2ab | 2010-02-27 19:51:04 +0000 | [diff] [blame] | 1624 | if (!PrimaryBases.insert(PrimaryBase)) |
| 1625 | assert(false && "Found a duplicate primary base!"); |
| 1626 | |
Anders Carlsson | 01d3c7d | 2010-02-27 18:09:40 +0000 | [diff] [blame] | 1627 | RD = PrimaryBase; |
Anders Carlsson | 8939e40 | 2010-02-23 06:34:44 +0000 | [diff] [blame] | 1628 | } |
| 1629 | |
| 1630 | // If the final overrider is an override of one of the primary bases, |
| 1631 | // then we know that it will be used. |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1632 | return OverridesIndirectMethodInBases(Overrider, PrimaryBases); |
Anders Carlsson | a8796c6 | 2010-02-23 04:26:39 +0000 | [diff] [blame] | 1633 | } |
| 1634 | |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1635 | /// FindNearestOverriddenMethod - Given a method, returns the overridden method |
| 1636 | /// from the nearest base. Returns null if no method was found. |
| 1637 | static const CXXMethodDecl * |
| 1638 | FindNearestOverriddenMethod(const CXXMethodDecl *MD, |
| 1639 | VtableBuilder::PrimaryBasesSetVectorTy &Bases) { |
| 1640 | for (int I = Bases.size(), E = 0; I != E; --I) { |
| 1641 | const CXXRecordDecl *PrimaryBase = Bases[I - 1]; |
| 1642 | |
| 1643 | // Now check the overriden methods. |
| 1644 | for (CXXMethodDecl::method_iterator I = MD->begin_overridden_methods(), |
| 1645 | E = MD->end_overridden_methods(); I != E; ++I) { |
| 1646 | const CXXMethodDecl *OverriddenMD = *I; |
| 1647 | |
| 1648 | // We found our overridden method. |
| 1649 | if (OverriddenMD->getParent() == PrimaryBase) |
| 1650 | return OverriddenMD; |
| 1651 | } |
| 1652 | } |
| 1653 | |
| 1654 | return 0; |
| 1655 | } |
| 1656 | |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1657 | void |
| 1658 | VtableBuilder::AddMethods(BaseSubobject Base, uint64_t BaseOffsetInLayoutClass, |
| 1659 | const CXXRecordDecl *FirstBaseInPrimaryBaseChain, |
| 1660 | uint64_t FirstBaseOffsetInLayoutClass, |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1661 | PrimaryBasesSetVectorTy &PrimaryBases) { |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1662 | const CXXRecordDecl *RD = Base.getBase(); |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1663 | const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD); |
| 1664 | |
| 1665 | if (const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase()) { |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1666 | uint64_t PrimaryBaseOffset; |
| 1667 | uint64_t PrimaryBaseOffsetInLayoutClass; |
Anders Carlsson | 0570f71 | 2010-02-23 03:48:14 +0000 | [diff] [blame] | 1668 | if (Layout.getPrimaryBaseWasVirtual()) { |
| 1669 | assert(Layout.getVBaseClassOffset(PrimaryBase) == 0 && |
| 1670 | "Primary vbase should have a zero offset!"); |
| 1671 | |
| 1672 | const ASTRecordLayout &MostDerivedClassLayout = |
| 1673 | Context.getASTRecordLayout(MostDerivedClass); |
| 1674 | |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1675 | PrimaryBaseOffset = |
| 1676 | MostDerivedClassLayout.getVBaseClassOffset(PrimaryBase); |
| 1677 | |
| 1678 | const ASTRecordLayout &LayoutClassLayout = |
| 1679 | Context.getASTRecordLayout(LayoutClass); |
| 1680 | |
| 1681 | PrimaryBaseOffsetInLayoutClass = |
| 1682 | LayoutClassLayout.getVBaseClassOffset(PrimaryBase); |
Anders Carlsson | 0570f71 | 2010-02-23 03:48:14 +0000 | [diff] [blame] | 1683 | } else { |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1684 | assert(Layout.getBaseClassOffset(PrimaryBase) == 0 && |
| 1685 | "Primary base should have a zero offset!"); |
Anders Carlsson | 0570f71 | 2010-02-23 03:48:14 +0000 | [diff] [blame] | 1686 | |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1687 | PrimaryBaseOffset = Base.getBaseOffset(); |
| 1688 | PrimaryBaseOffsetInLayoutClass = BaseOffsetInLayoutClass; |
Anders Carlsson | 0570f71 | 2010-02-23 03:48:14 +0000 | [diff] [blame] | 1689 | } |
Anders Carlsson | 7162ab9 | 2010-02-28 18:37:33 +0000 | [diff] [blame] | 1690 | |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1691 | AddMethods(BaseSubobject(PrimaryBase, PrimaryBaseOffset), |
| 1692 | PrimaryBaseOffsetInLayoutClass, FirstBaseInPrimaryBaseChain, |
| 1693 | FirstBaseOffsetInLayoutClass, PrimaryBases); |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1694 | |
| 1695 | if (!PrimaryBases.insert(PrimaryBase)) |
| 1696 | assert(false && "Found a duplicate primary base!"); |
| 1697 | } |
Anders Carlsson | 932c2f2 | 2010-02-11 17:18:51 +0000 | [diff] [blame] | 1698 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1699 | // Now go through all virtual member functions and add them. |
| 1700 | for (CXXRecordDecl::method_iterator I = RD->method_begin(), |
| 1701 | E = RD->method_end(); I != E; ++I) { |
| 1702 | const CXXMethodDecl *MD = *I; |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1703 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1704 | if (!MD->isVirtual()) |
| 1705 | continue; |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1706 | |
| 1707 | // Get the final overrider. |
Anders Carlsson | 136bd19 | 2010-02-12 16:55:34 +0000 | [diff] [blame] | 1708 | FinalOverriders::OverriderInfo Overrider = |
| 1709 | Overriders.getOverrider(Base, MD); |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1710 | |
| 1711 | // Check if this virtual member function overrides a method in a primary |
| 1712 | // base. If this is the case, and the return type doesn't require adjustment |
| 1713 | // then we can just use the member function from the primary base. |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1714 | if (const CXXMethodDecl *OverriddenMD = |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1715 | FindNearestOverriddenMethod(MD, PrimaryBases)) { |
Anders Carlsson | cce9ee8 | 2010-02-13 23:17:31 +0000 | [diff] [blame] | 1716 | if (ComputeReturnAdjustmentBaseOffset(Context, MD, |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1717 | OverriddenMD).isEmpty()) { |
| 1718 | // Replace the method info of the overridden method with our own |
| 1719 | // method. |
| 1720 | assert(MethodInfoMap.count(OverriddenMD) && |
| 1721 | "Did not find the overridden method!"); |
| 1722 | MethodInfo &OverriddenMethodInfo = MethodInfoMap[OverriddenMD]; |
| 1723 | |
| 1724 | MethodInfo MethodInfo(Base.getBaseOffset(), |
Anders Carlsson | 423406f3 | 2010-03-10 21:25:37 +0000 | [diff] [blame] | 1725 | BaseOffsetInLayoutClass, |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1726 | OverriddenMethodInfo.VtableIndex); |
| 1727 | |
| 1728 | assert(!MethodInfoMap.count(MD) && |
| 1729 | "Should not have method info for this method yet!"); |
| 1730 | |
| 1731 | MethodInfoMap.insert(std::make_pair(MD, MethodInfo)); |
| 1732 | MethodInfoMap.erase(OverriddenMD); |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1733 | continue; |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1734 | } |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1735 | } |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 1736 | |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1737 | // Insert the method info for this method. |
Anders Carlsson | 423406f3 | 2010-03-10 21:25:37 +0000 | [diff] [blame] | 1738 | MethodInfo MethodInfo(Base.getBaseOffset(), BaseOffsetInLayoutClass, |
| 1739 | Components.size()); |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1740 | |
| 1741 | assert(!MethodInfoMap.count(MD) && |
| 1742 | "Should not have method info for this method yet!"); |
| 1743 | MethodInfoMap.insert(std::make_pair(MD, MethodInfo)); |
Anders Carlsson | 01d3c7d | 2010-02-27 18:09:40 +0000 | [diff] [blame] | 1744 | |
| 1745 | // Check if this overrider is going to be used. |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1746 | const CXXMethodDecl *OverriderMD = Overrider.Method; |
| 1747 | if (!IsOverriderUsed(OverriderMD, BaseOffsetInLayoutClass, |
| 1748 | FirstBaseInPrimaryBaseChain, |
| 1749 | FirstBaseOffsetInLayoutClass)) { |
Anders Carlsson | 01d3c7d | 2010-02-27 18:09:40 +0000 | [diff] [blame] | 1750 | Components.push_back(VtableComponent::MakeUnusedFunction(OverriderMD)); |
| 1751 | continue; |
| 1752 | } |
Anders Carlsson | a8796c6 | 2010-02-23 04:26:39 +0000 | [diff] [blame] | 1753 | |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1754 | // Check if this overrider needs a return adjustment. |
Anders Carlsson | 075056a | 2010-02-23 01:34:28 +0000 | [diff] [blame] | 1755 | BaseOffset ReturnAdjustmentOffset = |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 1756 | Overriders.getReturnAdjustmentOffset(Base, MD); |
| 1757 | |
| 1758 | ReturnAdjustment ReturnAdjustment = |
| 1759 | ComputeReturnAdjustment(ReturnAdjustmentOffset); |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1760 | |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1761 | AddMethod(Overrider.Method, ReturnAdjustment); |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1762 | } |
| 1763 | } |
| 1764 | |
Anders Carlsson | b716a54 | 2010-02-16 16:26:28 +0000 | [diff] [blame] | 1765 | void VtableBuilder::LayoutVtable() { |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1766 | LayoutPrimaryAndSecondaryVtables(BaseSubobject(MostDerivedClass, 0), |
| 1767 | MostDerivedClassIsVirtual, |
| 1768 | MostDerivedClassOffset); |
Anders Carlsson | b716a54 | 2010-02-16 16:26:28 +0000 | [diff] [blame] | 1769 | |
Anders Carlsson | 13f0f66 | 2010-02-16 16:49:35 +0000 | [diff] [blame] | 1770 | VisitedVirtualBasesSetTy VBases; |
Anders Carlsson | b08aaa3 | 2010-02-27 04:05:52 +0000 | [diff] [blame] | 1771 | |
| 1772 | // Determine the primary virtual bases. |
Anders Carlsson | 02b99d6 | 2010-03-10 03:02:01 +0000 | [diff] [blame] | 1773 | DeterminePrimaryVirtualBases(MostDerivedClass, MostDerivedClassOffset, |
| 1774 | VBases); |
Anders Carlsson | b08aaa3 | 2010-02-27 04:05:52 +0000 | [diff] [blame] | 1775 | VBases.clear(); |
| 1776 | |
Anders Carlsson | 13f0f66 | 2010-02-16 16:49:35 +0000 | [diff] [blame] | 1777 | LayoutVtablesForVirtualBases(MostDerivedClass, VBases); |
Anders Carlsson | b716a54 | 2010-02-16 16:26:28 +0000 | [diff] [blame] | 1778 | } |
| 1779 | |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1780 | void |
| 1781 | VtableBuilder::LayoutPrimaryAndSecondaryVtables(BaseSubobject Base, |
| 1782 | bool BaseIsVirtual, |
| 1783 | uint64_t OffsetInLayoutClass) { |
Chris Lattner | d2408f7 | 2010-02-17 21:42:34 +0000 | [diff] [blame] | 1784 | assert(Base.getBase()->isDynamicClass() && "class does not have a vtable!"); |
Anders Carlsson | 033d486 | 2010-02-14 17:05:59 +0000 | [diff] [blame] | 1785 | |
Anders Carlsson | 77904f1 | 2010-02-16 04:59:55 +0000 | [diff] [blame] | 1786 | // Add vcall and vbase offsets for this vtable. |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1787 | VCallAndVBaseOffsetBuilder Builder(MostDerivedClass, LayoutClass, &Overriders, |
| 1788 | Base, BaseIsVirtual, OffsetInLayoutClass); |
Anders Carlsson | 422f778 | 2010-02-25 03:45:56 +0000 | [diff] [blame] | 1789 | Components.append(Builder.components_begin(), Builder.components_end()); |
| 1790 | |
Anders Carlsson | 9e3b3a3 | 2010-02-25 22:23:13 +0000 | [diff] [blame] | 1791 | // Check if we need to add these vcall offsets. |
| 1792 | if (BaseIsVirtual && !Builder.getVCallOffsets().empty()) { |
| 1793 | VCallOffsetMap &VCallOffsets = VCallOffsetsForVBases[Base.getBase()]; |
| 1794 | |
| 1795 | if (VCallOffsets.empty()) |
| 1796 | VCallOffsets = Builder.getVCallOffsets(); |
| 1797 | } |
| 1798 | |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 1799 | // If we're laying out the most derived class we want to keep track of the |
| 1800 | // virtual base class offset offsets. |
| 1801 | if (Base.getBase() == MostDerivedClass) |
| 1802 | VBaseOffsetOffsets = Builder.getVBaseOffsetOffsets(); |
| 1803 | |
Anders Carlsson | 77904f1 | 2010-02-16 04:59:55 +0000 | [diff] [blame] | 1804 | // Add the offset to top. |
Anders Carlsson | 258a1e3 | 2010-02-14 00:16:19 +0000 | [diff] [blame] | 1805 | // FIXME: We should not use / 8 here. |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1806 | int64_t OffsetToTop = -(int64_t)(OffsetInLayoutClass - |
| 1807 | MostDerivedClassOffset) / 8; |
Anders Carlsson | e75aaa9 | 2010-02-13 22:05:23 +0000 | [diff] [blame] | 1808 | Components.push_back(VtableComponent::MakeOffsetToTop(OffsetToTop)); |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1809 | |
| 1810 | // Next, add the RTTI. |
Anders Carlsson | e75aaa9 | 2010-02-13 22:05:23 +0000 | [diff] [blame] | 1811 | Components.push_back(VtableComponent::MakeRTTI(MostDerivedClass)); |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1812 | |
Anders Carlsson | e8a9756 | 2010-02-12 07:43:48 +0000 | [diff] [blame] | 1813 | uint64_t AddressPoint = Components.size(); |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1814 | |
| 1815 | // Now go through all virtual member functions and add them. |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1816 | PrimaryBasesSetVectorTy PrimaryBases; |
Anders Carlsson | 804cf51 | 2010-03-10 06:51:42 +0000 | [diff] [blame] | 1817 | AddMethods(Base, OffsetInLayoutClass, Base.getBase(), OffsetInLayoutClass, |
| 1818 | PrimaryBases); |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1819 | |
Anders Carlsson | 4068798 | 2010-02-27 16:52:49 +0000 | [diff] [blame] | 1820 | // Compute 'this' pointer adjustments. |
| 1821 | ComputeThisAdjustments(); |
| 1822 | |
Anders Carlsson | e8a9756 | 2010-02-12 07:43:48 +0000 | [diff] [blame] | 1823 | // Record the address point. |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1824 | AddressPoints.insert(std::make_pair(BaseSubobject(Base.getBase(), |
| 1825 | OffsetInLayoutClass), |
| 1826 | AddressPoint)); |
Anders Carlsson | e8a9756 | 2010-02-12 07:43:48 +0000 | [diff] [blame] | 1827 | |
| 1828 | // Record the address points for all primary bases. |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 1829 | for (PrimaryBasesSetVectorTy::const_iterator I = PrimaryBases.begin(), |
Anders Carlsson | e8a9756 | 2010-02-12 07:43:48 +0000 | [diff] [blame] | 1830 | E = PrimaryBases.end(); I != E; ++I) { |
| 1831 | const CXXRecordDecl *BaseDecl = *I; |
| 1832 | |
| 1833 | // We know that all the primary bases have the same offset as the base |
| 1834 | // subobject. |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1835 | BaseSubobject PrimaryBase(BaseDecl, OffsetInLayoutClass); |
Anders Carlsson | e8a9756 | 2010-02-12 07:43:48 +0000 | [diff] [blame] | 1836 | AddressPoints.insert(std::make_pair(PrimaryBase, AddressPoint)); |
| 1837 | } |
| 1838 | |
Anders Carlsson | 115b475 | 2010-03-10 19:39:11 +0000 | [diff] [blame] | 1839 | bool BaseIsMorallyVirtual = BaseIsVirtual; |
| 1840 | if (isBuildingConstructorVtable() && Base.getBase() == MostDerivedClass) |
| 1841 | BaseIsMorallyVirtual = false; |
| 1842 | |
Anders Carlsson | a9f633b | 2010-02-24 16:43:12 +0000 | [diff] [blame] | 1843 | // Layout secondary vtables. |
Anders Carlsson | 115b475 | 2010-03-10 19:39:11 +0000 | [diff] [blame] | 1844 | LayoutSecondaryVtables(Base, BaseIsMorallyVirtual, OffsetInLayoutClass); |
Anders Carlsson | 1415793 | 2010-02-16 16:02:57 +0000 | [diff] [blame] | 1845 | } |
| 1846 | |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1847 | void VtableBuilder::LayoutSecondaryVtables(BaseSubobject Base, |
Anders Carlsson | 115b475 | 2010-03-10 19:39:11 +0000 | [diff] [blame] | 1848 | bool BaseIsMorallyVirtual, |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1849 | uint64_t OffsetInLayoutClass) { |
Anders Carlsson | 1415793 | 2010-02-16 16:02:57 +0000 | [diff] [blame] | 1850 | // Itanium C++ ABI 2.5.2: |
| 1851 | // Following the primary virtual table of a derived class are secondary |
| 1852 | // virtual tables for each of its proper base classes, except any primary |
| 1853 | // base(s) with which it shares its primary virtual table. |
| 1854 | |
| 1855 | const CXXRecordDecl *RD = Base.getBase(); |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1856 | const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD); |
| 1857 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
Anders Carlsson | 1415793 | 2010-02-16 16:02:57 +0000 | [diff] [blame] | 1858 | |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1859 | for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(), |
| 1860 | E = RD->bases_end(); I != E; ++I) { |
Anders Carlsson | 1415793 | 2010-02-16 16:02:57 +0000 | [diff] [blame] | 1861 | // Ignore virtual bases, we'll emit them later. |
| 1862 | if (I->isVirtual()) |
| 1863 | continue; |
| 1864 | |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1865 | const CXXRecordDecl *BaseDecl = |
| 1866 | cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl()); |
Anders Carlsson | 033d486 | 2010-02-14 17:05:59 +0000 | [diff] [blame] | 1867 | |
Anders Carlsson | dc2dba3 | 2010-02-16 04:49:44 +0000 | [diff] [blame] | 1868 | // Ignore bases that don't have a vtable. |
| 1869 | if (!BaseDecl->isDynamicClass()) |
| 1870 | continue; |
Anders Carlsson | 033d486 | 2010-02-14 17:05:59 +0000 | [diff] [blame] | 1871 | |
Anders Carlsson | 703a086 | 2010-03-10 19:15:26 +0000 | [diff] [blame] | 1872 | if (isBuildingConstructorVtable()) { |
| 1873 | // Itanium C++ ABI 2.6.4: |
| 1874 | // Some of the base class subobjects may not need construction virtual |
| 1875 | // tables, which will therefore not be present in the construction |
| 1876 | // virtual table group, even though the subobject virtual tables are |
| 1877 | // present in the main virtual table group for the complete object. |
Anders Carlsson | 115b475 | 2010-03-10 19:39:11 +0000 | [diff] [blame] | 1878 | if (!BaseIsMorallyVirtual && !BaseDecl->getNumVBases()) |
Anders Carlsson | 703a086 | 2010-03-10 19:15:26 +0000 | [diff] [blame] | 1879 | continue; |
Anders Carlsson | 703a086 | 2010-03-10 19:15:26 +0000 | [diff] [blame] | 1880 | } |
| 1881 | |
Anders Carlsson | e75aaa9 | 2010-02-13 22:05:23 +0000 | [diff] [blame] | 1882 | // Get the base offset of this base. |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1883 | uint64_t RelativeBaseOffset = Layout.getBaseClassOffset(BaseDecl); |
| 1884 | uint64_t BaseOffset = Base.getBaseOffset() + RelativeBaseOffset; |
| 1885 | |
| 1886 | uint64_t BaseOffsetInLayoutClass = OffsetInLayoutClass + RelativeBaseOffset; |
Anders Carlsson | 1415793 | 2010-02-16 16:02:57 +0000 | [diff] [blame] | 1887 | |
| 1888 | // Don't emit a secondary vtable for a primary base. We might however want |
| 1889 | // to emit secondary vtables for other bases of this base. |
| 1890 | if (BaseDecl == PrimaryBase) { |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1891 | LayoutSecondaryVtables(BaseSubobject(BaseDecl, BaseOffset), |
Anders Carlsson | 115b475 | 2010-03-10 19:39:11 +0000 | [diff] [blame] | 1892 | BaseIsMorallyVirtual, BaseOffsetInLayoutClass); |
Anders Carlsson | 1415793 | 2010-02-16 16:02:57 +0000 | [diff] [blame] | 1893 | continue; |
| 1894 | } |
Anders Carlsson | e75aaa9 | 2010-02-13 22:05:23 +0000 | [diff] [blame] | 1895 | |
Anders Carlsson | b716a54 | 2010-02-16 16:26:28 +0000 | [diff] [blame] | 1896 | // Layout the primary vtable (and any secondary vtables) for this base. |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1897 | LayoutPrimaryAndSecondaryVtables(BaseSubobject(BaseDecl, BaseOffset), |
| 1898 | /*BaseIsVirtual=*/false, |
| 1899 | BaseOffsetInLayoutClass); |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 1900 | } |
| 1901 | } |
| 1902 | |
Anders Carlsson | 13f0f66 | 2010-02-16 16:49:35 +0000 | [diff] [blame] | 1903 | void |
Anders Carlsson | 02b99d6 | 2010-03-10 03:02:01 +0000 | [diff] [blame] | 1904 | VtableBuilder::DeterminePrimaryVirtualBases(const CXXRecordDecl *RD, |
| 1905 | uint64_t OffsetInLayoutClass, |
Anders Carlsson | b08aaa3 | 2010-02-27 04:05:52 +0000 | [diff] [blame] | 1906 | VisitedVirtualBasesSetTy &VBases) { |
| 1907 | const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD); |
| 1908 | |
| 1909 | // Check if this base has a primary base. |
| 1910 | if (const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase()) { |
Anders Carlsson | 8b37bb7 | 2010-02-28 18:08:38 +0000 | [diff] [blame] | 1911 | |
| 1912 | // Check if it's virtual. |
| 1913 | if (Layout.getPrimaryBaseWasVirtual()) { |
| 1914 | bool IsPrimaryVirtualBase = true; |
| 1915 | |
| 1916 | if (isBuildingConstructorVtable()) { |
| 1917 | // Check if the base is actually a primary base in the class we use for |
| 1918 | // layout. |
Anders Carlsson | 02b99d6 | 2010-03-10 03:02:01 +0000 | [diff] [blame] | 1919 | const ASTRecordLayout &LayoutClassLayout = |
| 1920 | Context.getASTRecordLayout(LayoutClass); |
| 1921 | |
| 1922 | uint64_t PrimaryBaseOffsetInLayoutClass = |
| 1923 | LayoutClassLayout.getVBaseClassOffset(PrimaryBase); |
| 1924 | |
| 1925 | // We know that the base is not a primary base in the layout class if |
| 1926 | // the base offsets are different. |
| 1927 | if (PrimaryBaseOffsetInLayoutClass != OffsetInLayoutClass) |
Anders Carlsson | 8b37bb7 | 2010-02-28 18:08:38 +0000 | [diff] [blame] | 1928 | IsPrimaryVirtualBase = false; |
| 1929 | } |
| 1930 | |
| 1931 | if (IsPrimaryVirtualBase) |
| 1932 | PrimaryVirtualBases.insert(PrimaryBase); |
| 1933 | } |
Anders Carlsson | b08aaa3 | 2010-02-27 04:05:52 +0000 | [diff] [blame] | 1934 | } |
| 1935 | |
| 1936 | // Traverse bases, looking for more primary virtual bases. |
| 1937 | for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(), |
| 1938 | E = RD->bases_end(); I != E; ++I) { |
| 1939 | const CXXRecordDecl *BaseDecl = |
| 1940 | cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl()); |
| 1941 | |
Anders Carlsson | 02b99d6 | 2010-03-10 03:02:01 +0000 | [diff] [blame] | 1942 | uint64_t BaseOffsetInLayoutClass; |
| 1943 | |
| 1944 | if (I->isVirtual()) { |
| 1945 | if (!VBases.insert(BaseDecl)) |
| 1946 | continue; |
| 1947 | |
| 1948 | const ASTRecordLayout &LayoutClassLayout = |
| 1949 | Context.getASTRecordLayout(LayoutClass); |
Anders Carlsson | b08aaa3 | 2010-02-27 04:05:52 +0000 | [diff] [blame] | 1950 | |
Anders Carlsson | 02b99d6 | 2010-03-10 03:02:01 +0000 | [diff] [blame] | 1951 | BaseOffsetInLayoutClass = LayoutClassLayout.getVBaseClassOffset(BaseDecl); |
| 1952 | } else { |
| 1953 | BaseOffsetInLayoutClass = |
| 1954 | OffsetInLayoutClass + Layout.getBaseClassOffset(BaseDecl); |
| 1955 | } |
| 1956 | |
| 1957 | DeterminePrimaryVirtualBases(BaseDecl, BaseOffsetInLayoutClass, VBases); |
Anders Carlsson | b08aaa3 | 2010-02-27 04:05:52 +0000 | [diff] [blame] | 1958 | } |
| 1959 | } |
| 1960 | |
| 1961 | void |
Anders Carlsson | 13f0f66 | 2010-02-16 16:49:35 +0000 | [diff] [blame] | 1962 | VtableBuilder::LayoutVtablesForVirtualBases(const CXXRecordDecl *RD, |
| 1963 | VisitedVirtualBasesSetTy &VBases) { |
| 1964 | // Itanium C++ ABI 2.5.2: |
| 1965 | // Then come the virtual base virtual tables, also in inheritance graph |
| 1966 | // order, and again excluding primary bases (which share virtual tables with |
| 1967 | // the classes for which they are primary). |
Anders Carlsson | 13f0f66 | 2010-02-16 16:49:35 +0000 | [diff] [blame] | 1968 | for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(), |
| 1969 | E = RD->bases_end(); I != E; ++I) { |
| 1970 | const CXXRecordDecl *BaseDecl = |
| 1971 | cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl()); |
| 1972 | |
Anders Carlsson | 0570f71 | 2010-02-23 03:48:14 +0000 | [diff] [blame] | 1973 | // Check if this base needs a vtable. (If it's virtual, not a primary base |
| 1974 | // of some other class, and we haven't visited it before). |
Anders Carlsson | 13f0f66 | 2010-02-16 16:49:35 +0000 | [diff] [blame] | 1975 | if (I->isVirtual() && BaseDecl->isDynamicClass() && |
Anders Carlsson | b08aaa3 | 2010-02-27 04:05:52 +0000 | [diff] [blame] | 1976 | !PrimaryVirtualBases.count(BaseDecl) && VBases.insert(BaseDecl)) { |
Anders Carlsson | 13f0f66 | 2010-02-16 16:49:35 +0000 | [diff] [blame] | 1977 | const ASTRecordLayout &MostDerivedClassLayout = |
| 1978 | Context.getASTRecordLayout(MostDerivedClass); |
| 1979 | uint64_t BaseOffset = |
| 1980 | MostDerivedClassLayout.getVBaseClassOffset(BaseDecl); |
| 1981 | |
Anders Carlsson | e3385f5 | 2010-02-28 01:43:58 +0000 | [diff] [blame] | 1982 | const ASTRecordLayout &LayoutClassLayout = |
| 1983 | Context.getASTRecordLayout(LayoutClass); |
| 1984 | uint64_t BaseOffsetInLayoutClass = |
| 1985 | LayoutClassLayout.getVBaseClassOffset(BaseDecl); |
| 1986 | |
| 1987 | LayoutPrimaryAndSecondaryVtables(BaseSubobject(BaseDecl, BaseOffset), |
| 1988 | /*BaseIsVirtual=*/true, |
| 1989 | BaseOffsetInLayoutClass); |
Anders Carlsson | 13f0f66 | 2010-02-16 16:49:35 +0000 | [diff] [blame] | 1990 | } |
| 1991 | |
| 1992 | // We only need to check the base for virtual base vtables if it actually |
| 1993 | // has virtual bases. |
| 1994 | if (BaseDecl->getNumVBases()) |
| 1995 | LayoutVtablesForVirtualBases(BaseDecl, VBases); |
| 1996 | } |
| 1997 | } |
| 1998 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 1999 | /// dumpLayout - Dump the vtable layout. |
| 2000 | void VtableBuilder::dumpLayout(llvm::raw_ostream& Out) { |
Anders Carlsson | 9391375 | 2010-02-27 20:39:05 +0000 | [diff] [blame] | 2001 | |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 2002 | if (isBuildingConstructorVtable()) { |
Anders Carlsson | 9391375 | 2010-02-27 20:39:05 +0000 | [diff] [blame] | 2003 | Out << "Construction vtable for ('"; |
| 2004 | Out << MostDerivedClass->getQualifiedNameAsString() << "', "; |
| 2005 | // FIXME: Don't use / 8 . |
| 2006 | Out << MostDerivedClassOffset / 8 << ") in '"; |
| 2007 | Out << LayoutClass->getQualifiedNameAsString(); |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 2008 | } else { |
| 2009 | Out << "Vtable for '"; |
| 2010 | Out << MostDerivedClass->getQualifiedNameAsString(); |
Anders Carlsson | 9391375 | 2010-02-27 20:39:05 +0000 | [diff] [blame] | 2011 | } |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2012 | Out << "' (" << Components.size() << " entries).\n"; |
| 2013 | |
Anders Carlsson | 932c2f2 | 2010-02-11 17:18:51 +0000 | [diff] [blame] | 2014 | // Iterate through the address points and insert them into a new map where |
| 2015 | // they are keyed by the index and not the base object. |
| 2016 | // Since an address point can be shared by multiple subobjects, we use an |
| 2017 | // STL multimap. |
| 2018 | std::multimap<uint64_t, BaseSubobject> AddressPointsByIndex; |
| 2019 | for (CGVtableInfo::AddressPointsMapTy::const_iterator I = |
| 2020 | AddressPoints.begin(), E = AddressPoints.end(); I != E; ++I) { |
| 2021 | const BaseSubobject& Base = I->first; |
| 2022 | uint64_t Index = I->second; |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2023 | |
Anders Carlsson | 932c2f2 | 2010-02-11 17:18:51 +0000 | [diff] [blame] | 2024 | AddressPointsByIndex.insert(std::make_pair(Index, Base)); |
| 2025 | } |
| 2026 | |
| 2027 | for (unsigned I = 0, E = Components.size(); I != E; ++I) { |
Anders Carlsson | e8a9756 | 2010-02-12 07:43:48 +0000 | [diff] [blame] | 2028 | uint64_t Index = I; |
Anders Carlsson | 932c2f2 | 2010-02-11 17:18:51 +0000 | [diff] [blame] | 2029 | |
| 2030 | Out << llvm::format("%4d | ", I); |
| 2031 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2032 | const VtableComponent &Component = Components[I]; |
| 2033 | |
| 2034 | // Dump the component. |
| 2035 | switch (Component.getKind()) { |
Anders Carlsson | b0a588f | 2010-02-17 06:07:19 +0000 | [diff] [blame] | 2036 | |
| 2037 | case VtableComponent::CK_VCallOffset: |
| 2038 | Out << "vcall_offset (" << Component.getVCallOffset() << ")"; |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2039 | break; |
Anders Carlsson | 77904f1 | 2010-02-16 04:59:55 +0000 | [diff] [blame] | 2040 | |
| 2041 | case VtableComponent::CK_VBaseOffset: |
| 2042 | Out << "vbase_offset (" << Component.getVBaseOffset() << ")"; |
| 2043 | break; |
| 2044 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2045 | case VtableComponent::CK_OffsetToTop: |
| 2046 | Out << "offset_to_top (" << Component.getOffsetToTop() << ")"; |
| 2047 | break; |
| 2048 | |
| 2049 | case VtableComponent::CK_RTTI: |
| 2050 | Out << Component.getRTTIDecl()->getQualifiedNameAsString() << " RTTI"; |
| 2051 | break; |
| 2052 | |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 2053 | case VtableComponent::CK_FunctionPointer: { |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2054 | const CXXMethodDecl *MD = Component.getFunctionDecl(); |
| 2055 | |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 2056 | std::string Str = |
| 2057 | PredefinedExpr::ComputeName(PredefinedExpr::PrettyFunctionNoVirtual, |
| 2058 | MD); |
| 2059 | Out << Str; |
Anders Carlsson | 09da337 | 2010-02-12 02:38:13 +0000 | [diff] [blame] | 2060 | if (MD->isPure()) |
| 2061 | Out << " [pure]"; |
| 2062 | |
Anders Carlsson | 8a24029 | 2010-03-12 04:54:20 +0000 | [diff] [blame] | 2063 | ThunkInfo Thunk = Thunks.lookup(I); |
| 2064 | if (!Thunk.isEmpty()) { |
| 2065 | // If this function pointer has a return adjustment, dump it. |
| 2066 | if (!Thunk.Return.isEmpty()) { |
| 2067 | Out << "\n [return adjustment: "; |
| 2068 | Out << Thunk.Return.NonVirtual << " non-virtual"; |
| 2069 | |
| 2070 | if (Thunk.Return.VBaseOffsetOffset) { |
| 2071 | Out << ", " << Thunk.Return.VBaseOffsetOffset; |
| 2072 | Out << " vbase offset offset"; |
| 2073 | } |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 2074 | |
Anders Carlsson | 8a24029 | 2010-03-12 04:54:20 +0000 | [diff] [blame] | 2075 | Out << ']'; |
| 2076 | } |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 2077 | |
Anders Carlsson | 8a24029 | 2010-03-12 04:54:20 +0000 | [diff] [blame] | 2078 | // If this function pointer has a 'this' pointer adjustment, dump it. |
| 2079 | if (!Thunk.This.isEmpty()) { |
| 2080 | Out << "\n [this adjustment: "; |
| 2081 | Out << Thunk.This.NonVirtual << " non-virtual"; |
| 2082 | |
| 2083 | if (Thunk.This.VCallOffsetOffset) { |
| 2084 | Out << ", " << Thunk.This.VCallOffsetOffset; |
| 2085 | Out << " vcall offset offset"; |
| 2086 | } |
Anders Carlsson | 78277c7 | 2010-02-18 17:00:09 +0000 | [diff] [blame] | 2087 | |
Anders Carlsson | 8a24029 | 2010-03-12 04:54:20 +0000 | [diff] [blame] | 2088 | Out << ']'; |
| 2089 | } |
Anders Carlsson | d3adb0c | 2010-02-13 23:40:17 +0000 | [diff] [blame] | 2090 | } |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 2091 | |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 2092 | break; |
| 2093 | } |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2094 | |
Anders Carlsson | 2d3d903 | 2010-02-19 06:03:53 +0000 | [diff] [blame] | 2095 | case VtableComponent::CK_CompleteDtorPointer: |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 2096 | case VtableComponent::CK_DeletingDtorPointer: { |
Anders Carlsson | 2d3d903 | 2010-02-19 06:03:53 +0000 | [diff] [blame] | 2097 | bool IsComplete = |
| 2098 | Component.getKind() == VtableComponent::CK_CompleteDtorPointer; |
| 2099 | |
Anders Carlsson | 5bd8d19 | 2010-02-11 18:20:28 +0000 | [diff] [blame] | 2100 | const CXXDestructorDecl *DD = Component.getDestructorDecl(); |
| 2101 | |
Anders Carlsson | 2d3d903 | 2010-02-19 06:03:53 +0000 | [diff] [blame] | 2102 | Out << DD->getQualifiedNameAsString(); |
| 2103 | if (IsComplete) |
| 2104 | Out << "() [complete]"; |
| 2105 | else |
| 2106 | Out << "() [deleting]"; |
| 2107 | |
Anders Carlsson | 09da337 | 2010-02-12 02:38:13 +0000 | [diff] [blame] | 2108 | if (DD->isPure()) |
| 2109 | Out << " [pure]"; |
| 2110 | |
Anders Carlsson | 8a24029 | 2010-03-12 04:54:20 +0000 | [diff] [blame] | 2111 | ThunkInfo Thunk = Thunks.lookup(I); |
| 2112 | if (!Thunk.isEmpty()) { |
| 2113 | // If this destructor has a 'this' pointer adjustment, dump it. |
| 2114 | if (!Thunk.This.isEmpty()) { |
| 2115 | Out << "\n [this adjustment: "; |
| 2116 | Out << Thunk.This.NonVirtual << " non-virtual"; |
| 2117 | |
| 2118 | if (Thunk.This.VCallOffsetOffset) { |
| 2119 | Out << ", " << Thunk.This.VCallOffsetOffset; |
| 2120 | Out << " vcall offset offset"; |
| 2121 | } |
| 2122 | |
| 2123 | Out << ']'; |
| 2124 | } |
| 2125 | } |
Anders Carlsson | 2d3d903 | 2010-02-19 06:03:53 +0000 | [diff] [blame] | 2126 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2127 | break; |
| 2128 | } |
| 2129 | |
Anders Carlsson | 350b56e | 2010-02-19 20:08:13 +0000 | [diff] [blame] | 2130 | case VtableComponent::CK_UnusedFunctionPointer: { |
| 2131 | const CXXMethodDecl *MD = Component.getUnusedFunctionDecl(); |
| 2132 | |
| 2133 | std::string Str = |
| 2134 | PredefinedExpr::ComputeName(PredefinedExpr::PrettyFunctionNoVirtual, |
| 2135 | MD); |
| 2136 | Out << "[unused] " << Str; |
| 2137 | if (MD->isPure()) |
| 2138 | Out << " [pure]"; |
| 2139 | } |
| 2140 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2141 | } |
Anders Carlsson | 932c2f2 | 2010-02-11 17:18:51 +0000 | [diff] [blame] | 2142 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2143 | Out << '\n'; |
Anders Carlsson | f98b47d3 | 2010-02-27 23:58:01 +0000 | [diff] [blame] | 2144 | |
| 2145 | // Dump the next address point. |
| 2146 | uint64_t NextIndex = Index + 1; |
| 2147 | if (AddressPointsByIndex.count(NextIndex)) { |
| 2148 | if (AddressPointsByIndex.count(NextIndex) == 1) { |
| 2149 | const BaseSubobject &Base = |
| 2150 | AddressPointsByIndex.find(NextIndex)->second; |
| 2151 | |
| 2152 | // FIXME: Instead of dividing by 8, we should be using CharUnits. |
| 2153 | Out << " -- (" << Base.getBase()->getQualifiedNameAsString(); |
| 2154 | Out << ", " << Base.getBaseOffset() / 8 << ") vtable address --\n"; |
| 2155 | } else { |
| 2156 | uint64_t BaseOffset = |
| 2157 | AddressPointsByIndex.lower_bound(NextIndex)->second.getBaseOffset(); |
| 2158 | |
| 2159 | // We store the class names in a set to get a stable order. |
| 2160 | std::set<std::string> ClassNames; |
| 2161 | for (std::multimap<uint64_t, BaseSubobject>::const_iterator I = |
| 2162 | AddressPointsByIndex.lower_bound(NextIndex), E = |
| 2163 | AddressPointsByIndex.upper_bound(NextIndex); I != E; ++I) { |
| 2164 | assert(I->second.getBaseOffset() == BaseOffset && |
| 2165 | "Invalid base offset!"); |
| 2166 | const CXXRecordDecl *RD = I->second.getBase(); |
| 2167 | ClassNames.insert(RD->getQualifiedNameAsString()); |
| 2168 | } |
| 2169 | |
| 2170 | for (std::set<std::string>::const_iterator I = ClassNames.begin(), |
| 2171 | E = ClassNames.end(); I != E; ++I) { |
| 2172 | // FIXME: Instead of dividing by 8, we should be using CharUnits. |
| 2173 | Out << " -- (" << *I; |
| 2174 | Out << ", " << BaseOffset / 8 << ") vtable address --\n"; |
| 2175 | } |
| 2176 | } |
| 2177 | } |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2178 | } |
Anders Carlsson | 9391375 | 2010-02-27 20:39:05 +0000 | [diff] [blame] | 2179 | |
| 2180 | Out << '\n'; |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 2181 | |
Anders Carlsson | 8a24029 | 2010-03-12 04:54:20 +0000 | [diff] [blame] | 2182 | if (!isBuildingConstructorVtable() && MostDerivedClass->getNumVBases()) { |
Anders Carlsson | 7f6b71e | 2010-03-11 06:43:12 +0000 | [diff] [blame] | 2183 | Out << "Virtual base offset offsets for '"; |
| 2184 | Out << MostDerivedClass->getQualifiedNameAsString() << "'.\n"; |
| 2185 | |
| 2186 | // We store the virtual base class names and their offsets in a map to get |
| 2187 | // a stable order. |
| 2188 | std::map<std::string, int64_t> ClassNamesAndOffsets; |
| 2189 | |
| 2190 | for (VBaseOffsetOffsetsMapTy::const_iterator I = VBaseOffsetOffsets.begin(), |
| 2191 | E = VBaseOffsetOffsets.end(); I != E; ++I) { |
| 2192 | std::string ClassName = I->first->getQualifiedNameAsString(); |
| 2193 | int64_t OffsetOffset = I->second; |
| 2194 | ClassNamesAndOffsets.insert(std::make_pair(ClassName, OffsetOffset)); |
| 2195 | } |
| 2196 | |
| 2197 | for (std::map<std::string, int64_t>::const_iterator I = |
| 2198 | ClassNamesAndOffsets.begin(), E = ClassNamesAndOffsets.end(); |
| 2199 | I != E; ++I) |
| 2200 | Out << " " << I->first << " | " << I->second << '\n'; |
| 2201 | |
| 2202 | Out << "\n"; |
| 2203 | } |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2204 | } |
| 2205 | |
| 2206 | } |
| 2207 | |
| 2208 | namespace { |
| 2209 | class OldVtableBuilder { |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2210 | public: |
| 2211 | /// Index_t - Vtable index type. |
| 2212 | typedef uint64_t Index_t; |
Eli Friedman | 31bc3ad | 2009-12-07 23:56:34 +0000 | [diff] [blame] | 2213 | typedef std::vector<std::pair<GlobalDecl, |
| 2214 | std::pair<GlobalDecl, ThunkAdjustment> > > |
| 2215 | SavedAdjustmentsVectorTy; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2216 | private: |
Anders Carlsson | 472404f | 2009-12-04 16:19:30 +0000 | [diff] [blame] | 2217 | |
Anders Carlsson | fe5f7d9 | 2009-12-06 01:09:21 +0000 | [diff] [blame] | 2218 | // VtableComponents - The components of the vtable being built. |
| 2219 | typedef llvm::SmallVector<llvm::Constant *, 64> VtableComponentsVectorTy; |
| 2220 | VtableComponentsVectorTy VtableComponents; |
| 2221 | |
Eli Friedman | 6c08ce7 | 2009-12-05 01:05:03 +0000 | [diff] [blame] | 2222 | const bool BuildVtable; |
| 2223 | |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2224 | llvm::Type *Ptr8Ty; |
Anders Carlsson | bad80eb | 2009-12-04 18:36:22 +0000 | [diff] [blame] | 2225 | |
| 2226 | /// MostDerivedClass - The most derived class that this vtable is being |
| 2227 | /// built for. |
| 2228 | const CXXRecordDecl *MostDerivedClass; |
| 2229 | |
Mike Stump | 83066c8 | 2009-11-13 01:54:23 +0000 | [diff] [blame] | 2230 | /// LayoutClass - The most derived class used for virtual base layout |
| 2231 | /// information. |
| 2232 | const CXXRecordDecl *LayoutClass; |
Mike Stump | 653d0b9 | 2009-11-13 02:13:54 +0000 | [diff] [blame] | 2233 | /// LayoutOffset - The offset for Class in LayoutClass. |
| 2234 | uint64_t LayoutOffset; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2235 | /// BLayout - Layout for the most derived class that this vtable is being |
| 2236 | /// built for. |
| 2237 | const ASTRecordLayout &BLayout; |
| 2238 | llvm::SmallSet<const CXXRecordDecl *, 32> IndirectPrimary; |
| 2239 | llvm::SmallSet<const CXXRecordDecl *, 32> SeenVBase; |
| 2240 | llvm::Constant *rtti; |
| 2241 | llvm::LLVMContext &VMContext; |
| 2242 | CodeGenModule &CGM; // Per-module state. |
Anders Carlsson | f2f31f4 | 2009-12-04 03:46:21 +0000 | [diff] [blame] | 2243 | |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2244 | llvm::DenseMap<const CXXMethodDecl *, Index_t> VCall; |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 2245 | llvm::DenseMap<GlobalDecl, Index_t> VCallOffset; |
Mike Stump | 77537b1 | 2010-01-26 03:42:22 +0000 | [diff] [blame] | 2246 | llvm::DenseMap<GlobalDecl, Index_t> VCallOffsetForVCall; |
Mike Stump | cd6f9ed | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 2247 | // This is the offset to the nearest virtual base |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2248 | llvm::DenseMap<const CXXMethodDecl *, Index_t> NonVirtualOffset; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2249 | llvm::DenseMap<const CXXRecordDecl *, Index_t> VBIndex; |
Mike Stump | bb9ff05 | 2009-10-27 23:46:47 +0000 | [diff] [blame] | 2250 | |
Anders Carlsson | 323bb04 | 2009-11-26 19:54:33 +0000 | [diff] [blame] | 2251 | /// PureVirtualFunction - Points to __cxa_pure_virtual. |
| 2252 | llvm::Constant *PureVirtualFn; |
| 2253 | |
Anders Carlsson | a84b6e8 | 2009-12-04 02:01:07 +0000 | [diff] [blame] | 2254 | /// VtableMethods - A data structure for keeping track of methods in a vtable. |
| 2255 | /// Can add methods, override methods and iterate in vtable order. |
| 2256 | class VtableMethods { |
| 2257 | // MethodToIndexMap - Maps from a global decl to the index it has in the |
| 2258 | // Methods vector. |
| 2259 | llvm::DenseMap<GlobalDecl, uint64_t> MethodToIndexMap; |
| 2260 | |
| 2261 | /// Methods - The methods, in vtable order. |
| 2262 | typedef llvm::SmallVector<GlobalDecl, 16> MethodsVectorTy; |
| 2263 | MethodsVectorTy Methods; |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 2264 | MethodsVectorTy OrigMethods; |
Anders Carlsson | a84b6e8 | 2009-12-04 02:01:07 +0000 | [diff] [blame] | 2265 | |
| 2266 | public: |
| 2267 | /// AddMethod - Add a method to the vtable methods. |
| 2268 | void AddMethod(GlobalDecl GD) { |
| 2269 | assert(!MethodToIndexMap.count(GD) && |
| 2270 | "Method has already been added!"); |
| 2271 | |
| 2272 | MethodToIndexMap[GD] = Methods.size(); |
| 2273 | Methods.push_back(GD); |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 2274 | OrigMethods.push_back(GD); |
Anders Carlsson | a84b6e8 | 2009-12-04 02:01:07 +0000 | [diff] [blame] | 2275 | } |
| 2276 | |
| 2277 | /// OverrideMethod - Replace a method with another. |
| 2278 | void OverrideMethod(GlobalDecl OverriddenGD, GlobalDecl GD) { |
| 2279 | llvm::DenseMap<GlobalDecl, uint64_t>::iterator i |
| 2280 | = MethodToIndexMap.find(OverriddenGD); |
| 2281 | assert(i != MethodToIndexMap.end() && "Did not find entry!"); |
| 2282 | |
| 2283 | // Get the index of the old decl. |
| 2284 | uint64_t Index = i->second; |
| 2285 | |
| 2286 | // Replace the old decl with the new decl. |
| 2287 | Methods[Index] = GD; |
| 2288 | |
Anders Carlsson | a84b6e8 | 2009-12-04 02:01:07 +0000 | [diff] [blame] | 2289 | // And add the new. |
| 2290 | MethodToIndexMap[GD] = Index; |
| 2291 | } |
| 2292 | |
Anders Carlsson | 7bb7076 | 2009-12-04 15:49:02 +0000 | [diff] [blame] | 2293 | /// getIndex - Gives the index of a passed in GlobalDecl. Returns false if |
| 2294 | /// the index couldn't be found. |
Benjamin Kramer | 62ab616 | 2009-12-04 22:45:27 +0000 | [diff] [blame] | 2295 | bool getIndex(GlobalDecl GD, uint64_t &Index) const { |
Anders Carlsson | 7bb7076 | 2009-12-04 15:49:02 +0000 | [diff] [blame] | 2296 | llvm::DenseMap<GlobalDecl, uint64_t>::const_iterator i |
| 2297 | = MethodToIndexMap.find(GD); |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 2298 | |
Anders Carlsson | 7bb7076 | 2009-12-04 15:49:02 +0000 | [diff] [blame] | 2299 | if (i == MethodToIndexMap.end()) |
| 2300 | return false; |
Anders Carlsson | e609636 | 2009-12-04 03:41:37 +0000 | [diff] [blame] | 2301 | |
Anders Carlsson | 7bb7076 | 2009-12-04 15:49:02 +0000 | [diff] [blame] | 2302 | Index = i->second; |
| 2303 | return true; |
Anders Carlsson | e609636 | 2009-12-04 03:41:37 +0000 | [diff] [blame] | 2304 | } |
| 2305 | |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 2306 | GlobalDecl getOrigMethod(uint64_t Index) const { |
| 2307 | return OrigMethods[Index]; |
| 2308 | } |
| 2309 | |
Anders Carlsson | a84b6e8 | 2009-12-04 02:01:07 +0000 | [diff] [blame] | 2310 | MethodsVectorTy::size_type size() const { |
| 2311 | return Methods.size(); |
| 2312 | } |
| 2313 | |
| 2314 | void clear() { |
| 2315 | MethodToIndexMap.clear(); |
| 2316 | Methods.clear(); |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 2317 | OrigMethods.clear(); |
Anders Carlsson | a84b6e8 | 2009-12-04 02:01:07 +0000 | [diff] [blame] | 2318 | } |
| 2319 | |
Anders Carlsson | e609636 | 2009-12-04 03:41:37 +0000 | [diff] [blame] | 2320 | GlobalDecl operator[](uint64_t Index) const { |
Anders Carlsson | a84b6e8 | 2009-12-04 02:01:07 +0000 | [diff] [blame] | 2321 | return Methods[Index]; |
| 2322 | } |
| 2323 | }; |
| 2324 | |
| 2325 | /// Methods - The vtable methods we're currently building. |
| 2326 | VtableMethods Methods; |
| 2327 | |
Anders Carlsson | 4c837d2 | 2009-12-04 02:26:15 +0000 | [diff] [blame] | 2328 | /// ThisAdjustments - For a given index in the vtable, contains the 'this' |
| 2329 | /// pointer adjustment needed for a method. |
| 2330 | typedef llvm::DenseMap<uint64_t, ThunkAdjustment> ThisAdjustmentsMapTy; |
| 2331 | ThisAdjustmentsMapTy ThisAdjustments; |
Anders Carlsson | d420a31 | 2009-11-26 19:32:45 +0000 | [diff] [blame] | 2332 | |
Eli Friedman | 31bc3ad | 2009-12-07 23:56:34 +0000 | [diff] [blame] | 2333 | SavedAdjustmentsVectorTy SavedAdjustments; |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 2334 | |
Anders Carlsson | c521f95 | 2009-12-04 02:22:02 +0000 | [diff] [blame] | 2335 | /// BaseReturnTypes - Contains the base return types of methods who have been |
| 2336 | /// overridden with methods whose return types require adjustment. Used for |
| 2337 | /// generating covariant thunk information. |
| 2338 | typedef llvm::DenseMap<uint64_t, CanQualType> BaseReturnTypesMapTy; |
| 2339 | BaseReturnTypesMapTy BaseReturnTypes; |
Anders Carlsson | d420a31 | 2009-11-26 19:32:45 +0000 | [diff] [blame] | 2340 | |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2341 | std::vector<Index_t> VCalls; |
Mike Stump | 2cefe38 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 2342 | |
| 2343 | typedef std::pair<const CXXRecordDecl *, uint64_t> CtorVtable_t; |
Mike Stump | cd2b821 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 2344 | // subAddressPoints - Used to hold the AddressPoints (offsets) into the built |
| 2345 | // vtable for use in computing the initializers for the VTT. |
| 2346 | llvm::DenseMap<CtorVtable_t, int64_t> &subAddressPoints; |
Mike Stump | 2cefe38 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 2347 | |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 2348 | /// AddressPoints - Address points for this vtable. |
| 2349 | CGVtableInfo::AddressPointsMapTy& AddressPoints; |
| 2350 | |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2351 | typedef CXXRecordDecl::method_iterator method_iter; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2352 | const uint32_t LLVMPointerWidth; |
| 2353 | Index_t extra; |
Mike Stump | 37dbe96 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 2354 | typedef std::vector<std::pair<const CXXRecordDecl *, int64_t> > Path_t; |
Mike Stump | cd2b821 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 2355 | static llvm::DenseMap<CtorVtable_t, int64_t>& |
| 2356 | AllocAddressPoint(CodeGenModule &cgm, const CXXRecordDecl *l, |
| 2357 | const CXXRecordDecl *c) { |
Anders Carlsson | 93a1884 | 2010-01-02 18:02:32 +0000 | [diff] [blame] | 2358 | CGVtableInfo::AddrMap_t *&oref = cgm.getVtableInfo().AddressPoints[l]; |
Mike Stump | cd2b821 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 2359 | if (oref == 0) |
Anders Carlsson | 93a1884 | 2010-01-02 18:02:32 +0000 | [diff] [blame] | 2360 | oref = new CGVtableInfo::AddrMap_t; |
Mike Stump | cd2b821 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 2361 | |
| 2362 | llvm::DenseMap<CtorVtable_t, int64_t> *&ref = (*oref)[c]; |
| 2363 | if (ref == 0) |
| 2364 | ref = new llvm::DenseMap<CtorVtable_t, int64_t>; |
| 2365 | return *ref; |
| 2366 | } |
Anders Carlsson | 323bb04 | 2009-11-26 19:54:33 +0000 | [diff] [blame] | 2367 | |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2368 | bool DclIsSame(const FunctionDecl *New, const FunctionDecl *Old) { |
| 2369 | FunctionTemplateDecl *OldTemplate = Old->getDescribedFunctionTemplate(); |
| 2370 | FunctionTemplateDecl *NewTemplate = New->getDescribedFunctionTemplate(); |
| 2371 | |
| 2372 | // C++ [temp.fct]p2: |
| 2373 | // A function template can be overloaded with other function templates |
| 2374 | // and with normal (non-template) functions. |
| 2375 | if ((OldTemplate == 0) != (NewTemplate == 0)) |
| 2376 | return false; |
| 2377 | |
| 2378 | // Is the function New an overload of the function Old? |
| 2379 | QualType OldQType = CGM.getContext().getCanonicalType(Old->getType()); |
| 2380 | QualType NewQType = CGM.getContext().getCanonicalType(New->getType()); |
| 2381 | |
| 2382 | // Compare the signatures (C++ 1.3.10) of the two functions to |
| 2383 | // determine whether they are overloads. If we find any mismatch |
| 2384 | // in the signature, they are overloads. |
| 2385 | |
| 2386 | // If either of these functions is a K&R-style function (no |
| 2387 | // prototype), then we consider them to have matching signatures. |
| 2388 | if (isa<FunctionNoProtoType>(OldQType.getTypePtr()) || |
| 2389 | isa<FunctionNoProtoType>(NewQType.getTypePtr())) |
| 2390 | return true; |
| 2391 | |
| 2392 | FunctionProtoType* OldType = cast<FunctionProtoType>(OldQType); |
| 2393 | FunctionProtoType* NewType = cast<FunctionProtoType>(NewQType); |
| 2394 | |
| 2395 | // The signature of a function includes the types of its |
| 2396 | // parameters (C++ 1.3.10), which includes the presence or absence |
| 2397 | // of the ellipsis; see C++ DR 357). |
| 2398 | if (OldQType != NewQType && |
| 2399 | (OldType->getNumArgs() != NewType->getNumArgs() || |
| 2400 | OldType->isVariadic() != NewType->isVariadic() || |
| 2401 | !std::equal(OldType->arg_type_begin(), OldType->arg_type_end(), |
| 2402 | NewType->arg_type_begin()))) |
| 2403 | return false; |
| 2404 | |
| 2405 | #if 0 |
| 2406 | // C++ [temp.over.link]p4: |
| 2407 | // The signature of a function template consists of its function |
| 2408 | // signature, its return type and its template parameter list. The names |
| 2409 | // of the template parameters are significant only for establishing the |
| 2410 | // relationship between the template parameters and the rest of the |
| 2411 | // signature. |
| 2412 | // |
| 2413 | // We check the return type and template parameter lists for function |
| 2414 | // templates first; the remaining checks follow. |
| 2415 | if (NewTemplate && |
| 2416 | (!TemplateParameterListsAreEqual(NewTemplate->getTemplateParameters(), |
| 2417 | OldTemplate->getTemplateParameters(), |
| 2418 | TPL_TemplateMatch) || |
| 2419 | OldType->getResultType() != NewType->getResultType())) |
| 2420 | return false; |
| 2421 | #endif |
| 2422 | |
| 2423 | // If the function is a class member, its signature includes the |
| 2424 | // cv-qualifiers (if any) on the function itself. |
| 2425 | // |
| 2426 | // As part of this, also check whether one of the member functions |
| 2427 | // is static, in which case they are not overloads (C++ |
| 2428 | // 13.1p2). While not part of the definition of the signature, |
| 2429 | // this check is important to determine whether these functions |
| 2430 | // can be overloaded. |
| 2431 | const CXXMethodDecl* OldMethod = dyn_cast<CXXMethodDecl>(Old); |
| 2432 | const CXXMethodDecl* NewMethod = dyn_cast<CXXMethodDecl>(New); |
| 2433 | if (OldMethod && NewMethod && |
| 2434 | !OldMethod->isStatic() && !NewMethod->isStatic() && |
| 2435 | OldMethod->getTypeQualifiers() != NewMethod->getTypeQualifiers()) |
| 2436 | return false; |
| 2437 | |
| 2438 | // The signatures match; this is not an overload. |
| 2439 | return true; |
| 2440 | } |
| 2441 | |
| 2442 | typedef llvm::DenseMap<const CXXMethodDecl *, const CXXMethodDecl*> |
| 2443 | ForwardUnique_t; |
| 2444 | ForwardUnique_t ForwardUnique; |
| 2445 | llvm::DenseMap<const CXXMethodDecl*, const CXXMethodDecl*> UniqueOverrider; |
| 2446 | |
| 2447 | void BuildUniqueOverrider(const CXXMethodDecl *U, const CXXMethodDecl *MD) { |
| 2448 | const CXXMethodDecl *PrevU = UniqueOverrider[MD]; |
| 2449 | assert(U && "no unique overrider"); |
| 2450 | if (PrevU == U) |
| 2451 | return; |
| 2452 | if (PrevU != U && PrevU != 0) { |
| 2453 | // If already set, note the two sets as the same |
| 2454 | if (0) |
| 2455 | printf("%s::%s same as %s::%s\n", |
Douglas Gregor | 76eb74a | 2010-02-22 16:44:27 +0000 | [diff] [blame] | 2456 | PrevU->getParent()->getNameAsString().c_str(), |
| 2457 | PrevU->getNameAsString().c_str(), |
| 2458 | U->getParent()->getNameAsString().c_str(), |
| 2459 | U->getNameAsString().c_str()); |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2460 | ForwardUnique[PrevU] = U; |
| 2461 | return; |
| 2462 | } |
| 2463 | |
| 2464 | // Not set, set it now |
| 2465 | if (0) |
| 2466 | printf("marking %s::%s %p override as %s::%s\n", |
Douglas Gregor | 76eb74a | 2010-02-22 16:44:27 +0000 | [diff] [blame] | 2467 | MD->getParent()->getNameAsString().c_str(), |
| 2468 | MD->getNameAsString().c_str(), |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2469 | (void*)MD, |
Douglas Gregor | 76eb74a | 2010-02-22 16:44:27 +0000 | [diff] [blame] | 2470 | U->getParent()->getNameAsString().c_str(), |
| 2471 | U->getNameAsString().c_str()); |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2472 | UniqueOverrider[MD] = U; |
| 2473 | |
| 2474 | for (CXXMethodDecl::method_iterator mi = MD->begin_overridden_methods(), |
| 2475 | me = MD->end_overridden_methods(); mi != me; ++mi) { |
| 2476 | BuildUniqueOverrider(U, *mi); |
| 2477 | } |
| 2478 | } |
| 2479 | |
| 2480 | void BuildUniqueOverriders(const CXXRecordDecl *RD) { |
| 2481 | if (0) printf("walking %s\n", RD->getNameAsCString()); |
| 2482 | for (CXXRecordDecl::method_iterator i = RD->method_begin(), |
| 2483 | e = RD->method_end(); i != e; ++i) { |
| 2484 | const CXXMethodDecl *MD = *i; |
| 2485 | if (!MD->isVirtual()) |
| 2486 | continue; |
| 2487 | |
| 2488 | if (UniqueOverrider[MD] == 0) { |
| 2489 | // Only set this, if it hasn't been set yet. |
| 2490 | BuildUniqueOverrider(MD, MD); |
| 2491 | if (0) |
| 2492 | printf("top set is %s::%s %p\n", |
Douglas Gregor | 76eb74a | 2010-02-22 16:44:27 +0000 | [diff] [blame] | 2493 | MD->getParent()->getNameAsString().c_str(), |
| 2494 | MD->getNameAsString().c_str(), |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2495 | (void*)MD); |
| 2496 | ForwardUnique[MD] = MD; |
| 2497 | } |
| 2498 | } |
| 2499 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 2500 | e = RD->bases_end(); i != e; ++i) { |
| 2501 | const CXXRecordDecl *Base = |
| 2502 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 2503 | BuildUniqueOverriders(Base); |
| 2504 | } |
| 2505 | } |
| 2506 | |
| 2507 | static int DclCmp(const void *p1, const void *p2) { |
John McCall | ef3057c | 2010-02-13 01:04:05 +0000 | [diff] [blame] | 2508 | const CXXMethodDecl *MD1 = *(const CXXMethodDecl *const *)p1; |
| 2509 | const CXXMethodDecl *MD2 = *(const CXXMethodDecl *const *)p2; |
| 2510 | |
| 2511 | return (DeclarationName::compare(MD1->getDeclName(), MD2->getDeclName())); |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2512 | } |
| 2513 | |
| 2514 | void MergeForwarding() { |
| 2515 | typedef llvm::SmallVector<const CXXMethodDecl *, 100> A_t; |
| 2516 | A_t A; |
| 2517 | for (ForwardUnique_t::iterator I = ForwardUnique.begin(), |
| 2518 | E = ForwardUnique.end(); I != E; ++I) { |
| 2519 | if (I->first == I->second) |
| 2520 | // Only add the roots of all trees |
| 2521 | A.push_back(I->first); |
| 2522 | } |
| 2523 | llvm::array_pod_sort(A.begin(), A.end(), DclCmp); |
| 2524 | for (A_t::iterator I = A.begin(), |
| 2525 | E = A.end(); I != E; ++I) { |
| 2526 | A_t::iterator J = I; |
John McCall | ef3057c | 2010-02-13 01:04:05 +0000 | [diff] [blame] | 2527 | while (++J != E && DclCmp(I, J) == 0) |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2528 | if (DclIsSame(*I, *J)) { |
Douglas Gregor | 76eb74a | 2010-02-22 16:44:27 +0000 | [diff] [blame] | 2529 | if (0) printf("connecting %s\n", (*I)->getNameAsString().c_str()); |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2530 | ForwardUnique[*J] = *I; |
| 2531 | } |
| 2532 | } |
| 2533 | } |
| 2534 | |
| 2535 | const CXXMethodDecl *getUnique(const CXXMethodDecl *MD) { |
| 2536 | const CXXMethodDecl *U = UniqueOverrider[MD]; |
| 2537 | assert(U && "unique overrider not found"); |
| 2538 | while (ForwardUnique.count(U)) { |
| 2539 | const CXXMethodDecl *NU = ForwardUnique[U]; |
| 2540 | if (NU == U) break; |
| 2541 | U = NU; |
| 2542 | } |
| 2543 | return U; |
| 2544 | } |
Anders Carlsson | 7228117 | 2010-01-26 17:36:47 +0000 | [diff] [blame] | 2545 | |
| 2546 | GlobalDecl getUnique(GlobalDecl GD) { |
| 2547 | const CXXMethodDecl *Unique = getUnique(cast<CXXMethodDecl>(GD.getDecl())); |
| 2548 | |
| 2549 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Unique)) |
| 2550 | return GlobalDecl(CD, GD.getCtorType()); |
| 2551 | |
| 2552 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(Unique)) |
| 2553 | return GlobalDecl(DD, GD.getDtorType()); |
| 2554 | |
| 2555 | return Unique; |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2556 | } |
| 2557 | |
Anders Carlsson | 323bb04 | 2009-11-26 19:54:33 +0000 | [diff] [blame] | 2558 | /// getPureVirtualFn - Return the __cxa_pure_virtual function. |
| 2559 | llvm::Constant* getPureVirtualFn() { |
| 2560 | if (!PureVirtualFn) { |
| 2561 | const llvm::FunctionType *Ty = |
| 2562 | llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), |
| 2563 | /*isVarArg=*/false); |
| 2564 | PureVirtualFn = wrap(CGM.CreateRuntimeFunction(Ty, "__cxa_pure_virtual")); |
| 2565 | } |
| 2566 | |
| 2567 | return PureVirtualFn; |
| 2568 | } |
| 2569 | |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2570 | public: |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 2571 | OldVtableBuilder(const CXXRecordDecl *MostDerivedClass, |
Eli Friedman | 6c08ce7 | 2009-12-05 01:05:03 +0000 | [diff] [blame] | 2572 | const CXXRecordDecl *l, uint64_t lo, CodeGenModule &cgm, |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 2573 | bool build, CGVtableInfo::AddressPointsMapTy& AddressPoints) |
Eli Friedman | 6c08ce7 | 2009-12-05 01:05:03 +0000 | [diff] [blame] | 2574 | : BuildVtable(build), MostDerivedClass(MostDerivedClass), LayoutClass(l), |
| 2575 | LayoutOffset(lo), BLayout(cgm.getContext().getASTRecordLayout(l)), |
| 2576 | rtti(0), VMContext(cgm.getModule().getContext()),CGM(cgm), |
| 2577 | PureVirtualFn(0), |
Anders Carlsson | bad80eb | 2009-12-04 18:36:22 +0000 | [diff] [blame] | 2578 | subAddressPoints(AllocAddressPoint(cgm, l, MostDerivedClass)), |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 2579 | AddressPoints(AddressPoints), |
| 2580 | LLVMPointerWidth(cgm.getContext().Target.getPointerWidth(0)) |
| 2581 | { |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2582 | Ptr8Ty = llvm::PointerType::get(llvm::Type::getInt8Ty(VMContext), 0); |
Anders Carlsson | 3f4336c | 2009-12-17 07:09:17 +0000 | [diff] [blame] | 2583 | if (BuildVtable) { |
| 2584 | QualType ClassType = CGM.getContext().getTagDeclType(MostDerivedClass); |
| 2585 | rtti = CGM.GetAddrOfRTTIDescriptor(ClassType); |
| 2586 | } |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2587 | BuildUniqueOverriders(MostDerivedClass); |
| 2588 | MergeForwarding(); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2589 | } |
| 2590 | |
Anders Carlsson | fe5f7d9 | 2009-12-06 01:09:21 +0000 | [diff] [blame] | 2591 | // getVtableComponents - Returns a reference to the vtable components. |
| 2592 | const VtableComponentsVectorTy &getVtableComponents() const { |
| 2593 | return VtableComponents; |
Anders Carlsson | 472404f | 2009-12-04 16:19:30 +0000 | [diff] [blame] | 2594 | } |
| 2595 | |
Anders Carlsson | e36a6b3 | 2010-01-02 01:01:18 +0000 | [diff] [blame] | 2596 | llvm::DenseMap<const CXXRecordDecl *, uint64_t> &getVBIndex() |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2597 | { return VBIndex; } |
| 2598 | |
Eli Friedman | 31bc3ad | 2009-12-07 23:56:34 +0000 | [diff] [blame] | 2599 | SavedAdjustmentsVectorTy &getSavedAdjustments() |
| 2600 | { return SavedAdjustments; } |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 2601 | |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2602 | llvm::Constant *wrap(Index_t i) { |
| 2603 | llvm::Constant *m; |
| 2604 | m = llvm::ConstantInt::get(llvm::Type::getInt64Ty(VMContext), i); |
| 2605 | return llvm::ConstantExpr::getIntToPtr(m, Ptr8Ty); |
| 2606 | } |
| 2607 | |
| 2608 | llvm::Constant *wrap(llvm::Constant *m) { |
| 2609 | return llvm::ConstantExpr::getBitCast(m, Ptr8Ty); |
| 2610 | } |
| 2611 | |
Mike Stump | d280844 | 2010-01-22 02:51:26 +0000 | [diff] [blame] | 2612 | //#define D1(x) |
Douglas Gregor | f4f2e02 | 2010-02-22 16:48:26 +0000 | [diff] [blame] | 2613 | #define D1(X) do { if (getenv("CLANG_VTABLE_DEBUG")) { X; } } while (0) |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2614 | |
| 2615 | void GenerateVBaseOffsets(const CXXRecordDecl *RD, uint64_t Offset, |
Mike Stump | 2843121 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 2616 | bool updateVBIndex, Index_t current_vbindex) { |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2617 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 2618 | e = RD->bases_end(); i != e; ++i) { |
| 2619 | const CXXRecordDecl *Base = |
| 2620 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
Mike Stump | 2843121 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 2621 | Index_t next_vbindex = current_vbindex; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2622 | if (i->isVirtual() && !SeenVBase.count(Base)) { |
| 2623 | SeenVBase.insert(Base); |
Mike Stump | 2843121 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 2624 | if (updateVBIndex) { |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2625 | next_vbindex = (ssize_t)(-(VCalls.size()*LLVMPointerWidth/8) |
Mike Stump | 2843121 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 2626 | - 3*LLVMPointerWidth/8); |
| 2627 | VBIndex[Base] = next_vbindex; |
| 2628 | } |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2629 | int64_t BaseOffset = -(Offset/8) + BLayout.getVBaseClassOffset(Base)/8; |
| 2630 | VCalls.push_back((0?700:0) + BaseOffset); |
| 2631 | D1(printf(" vbase for %s at %d delta %d most derived %s\n", |
| 2632 | Base->getNameAsCString(), |
| 2633 | (int)-VCalls.size()-3, (int)BaseOffset, |
Mike Stump | d280844 | 2010-01-22 02:51:26 +0000 | [diff] [blame] | 2634 | MostDerivedClass->getNameAsCString())); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2635 | } |
Mike Stump | 2843121 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 2636 | // We also record offsets for non-virtual bases to closest enclosing |
| 2637 | // virtual base. We do this so that we don't have to search |
| 2638 | // for the nearst virtual base class when generating thunks. |
| 2639 | if (updateVBIndex && VBIndex.count(Base) == 0) |
| 2640 | VBIndex[Base] = next_vbindex; |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2641 | GenerateVBaseOffsets(Base, Offset, updateVBIndex, next_vbindex); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2642 | } |
| 2643 | } |
| 2644 | |
| 2645 | void StartNewTable() { |
| 2646 | SeenVBase.clear(); |
| 2647 | } |
| 2648 | |
Mike Stump | 8bccbfd | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 2649 | Index_t getNVOffset_1(const CXXRecordDecl *D, const CXXRecordDecl *B, |
| 2650 | Index_t Offset = 0) { |
| 2651 | |
| 2652 | if (B == D) |
| 2653 | return Offset; |
| 2654 | |
| 2655 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(D); |
| 2656 | for (CXXRecordDecl::base_class_const_iterator i = D->bases_begin(), |
| 2657 | e = D->bases_end(); i != e; ++i) { |
| 2658 | const CXXRecordDecl *Base = |
| 2659 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 2660 | int64_t BaseOffset = 0; |
| 2661 | if (!i->isVirtual()) |
| 2662 | BaseOffset = Offset + Layout.getBaseClassOffset(Base); |
| 2663 | int64_t o = getNVOffset_1(Base, B, BaseOffset); |
| 2664 | if (o >= 0) |
| 2665 | return o; |
| 2666 | } |
| 2667 | |
| 2668 | return -1; |
| 2669 | } |
| 2670 | |
| 2671 | /// getNVOffset - Returns the non-virtual offset for the given (B) base of the |
| 2672 | /// derived class D. |
| 2673 | Index_t getNVOffset(QualType qB, QualType qD) { |
Mike Stump | 4627132 | 2009-11-03 19:03:17 +0000 | [diff] [blame] | 2674 | qD = qD->getPointeeType(); |
| 2675 | qB = qB->getPointeeType(); |
Mike Stump | 8bccbfd | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 2676 | CXXRecordDecl *D = cast<CXXRecordDecl>(qD->getAs<RecordType>()->getDecl()); |
| 2677 | CXXRecordDecl *B = cast<CXXRecordDecl>(qB->getAs<RecordType>()->getDecl()); |
| 2678 | int64_t o = getNVOffset_1(D, B); |
| 2679 | if (o >= 0) |
| 2680 | return o; |
| 2681 | |
| 2682 | assert(false && "FIXME: non-virtual base not found"); |
| 2683 | return 0; |
| 2684 | } |
| 2685 | |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2686 | /// getVbaseOffset - Returns the index into the vtable for the virtual base |
| 2687 | /// offset for the given (B) virtual base of the derived class D. |
| 2688 | Index_t getVbaseOffset(QualType qB, QualType qD) { |
Mike Stump | 4627132 | 2009-11-03 19:03:17 +0000 | [diff] [blame] | 2689 | qD = qD->getPointeeType(); |
| 2690 | qB = qB->getPointeeType(); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2691 | CXXRecordDecl *D = cast<CXXRecordDecl>(qD->getAs<RecordType>()->getDecl()); |
| 2692 | CXXRecordDecl *B = cast<CXXRecordDecl>(qB->getAs<RecordType>()->getDecl()); |
Anders Carlsson | bad80eb | 2009-12-04 18:36:22 +0000 | [diff] [blame] | 2693 | if (D != MostDerivedClass) |
Anders Carlsson | 4cbe83c | 2010-03-11 07:15:17 +0000 | [diff] [blame] | 2694 | return CGM.getVtableInfo().getVirtualBaseOffsetOffset(D, B); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2695 | llvm::DenseMap<const CXXRecordDecl *, Index_t>::iterator i; |
| 2696 | i = VBIndex.find(B); |
| 2697 | if (i != VBIndex.end()) |
| 2698 | return i->second; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2699 | |
Mike Stump | 2843121 | 2009-10-13 22:54:56 +0000 | [diff] [blame] | 2700 | assert(false && "FIXME: Base not found"); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2701 | return 0; |
| 2702 | } |
| 2703 | |
Eli Friedman | 81fb0d2 | 2009-12-04 08:40:51 +0000 | [diff] [blame] | 2704 | bool OverrideMethod(GlobalDecl GD, bool MorallyVirtual, |
| 2705 | Index_t OverrideOffset, Index_t Offset, |
| 2706 | int64_t CurrentVBaseOffset); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2707 | |
Anders Carlsson | 495634e | 2009-12-04 02:39:04 +0000 | [diff] [blame] | 2708 | /// AppendMethods - Append the current methods to the vtable. |
Anders Carlsson | ddf42c8 | 2009-12-04 02:56:03 +0000 | [diff] [blame] | 2709 | void AppendMethodsToVtable(); |
Anders Carlsson | 495634e | 2009-12-04 02:39:04 +0000 | [diff] [blame] | 2710 | |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 2711 | llvm::Constant *WrapAddrOf(GlobalDecl GD) { |
| 2712 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); |
| 2713 | |
Anders Carlsson | 6445773 | 2009-11-24 05:08:52 +0000 | [diff] [blame] | 2714 | const llvm::Type *Ty = CGM.getTypes().GetFunctionTypeForVtable(MD); |
Mike Stump | 18e8b47 | 2009-10-27 23:36:26 +0000 | [diff] [blame] | 2715 | |
Mike Stump | cdeb800 | 2009-12-03 16:55:20 +0000 | [diff] [blame] | 2716 | return wrap(CGM.GetAddrOfFunction(GD, Ty)); |
Mike Stump | 18e8b47 | 2009-10-27 23:36:26 +0000 | [diff] [blame] | 2717 | } |
| 2718 | |
Mike Stump | cd6f9ed | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 2719 | void OverrideMethods(Path_t *Path, bool MorallyVirtual, int64_t Offset, |
| 2720 | int64_t CurrentVBaseOffset) { |
Mike Stump | 37dbe96 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 2721 | for (Path_t::reverse_iterator i = Path->rbegin(), |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2722 | e = Path->rend(); i != e; ++i) { |
| 2723 | const CXXRecordDecl *RD = i->first; |
Mike Stump | 8bccbfd | 2009-10-15 09:30:16 +0000 | [diff] [blame] | 2724 | int64_t OverrideOffset = i->second; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2725 | for (method_iter mi = RD->method_begin(), me = RD->method_end(); mi != me; |
| 2726 | ++mi) { |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 2727 | const CXXMethodDecl *MD = *mi; |
| 2728 | |
| 2729 | if (!MD->isVirtual()) |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2730 | continue; |
| 2731 | |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 2732 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(MD)) { |
| 2733 | // Override both the complete and the deleting destructor. |
| 2734 | GlobalDecl CompDtor(DD, Dtor_Complete); |
Eli Friedman | 81fb0d2 | 2009-12-04 08:40:51 +0000 | [diff] [blame] | 2735 | OverrideMethod(CompDtor, MorallyVirtual, OverrideOffset, Offset, |
| 2736 | CurrentVBaseOffset); |
| 2737 | |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 2738 | GlobalDecl DeletingDtor(DD, Dtor_Deleting); |
Eli Friedman | 81fb0d2 | 2009-12-04 08:40:51 +0000 | [diff] [blame] | 2739 | OverrideMethod(DeletingDtor, MorallyVirtual, OverrideOffset, Offset, |
| 2740 | CurrentVBaseOffset); |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 2741 | } else { |
Eli Friedman | 81fb0d2 | 2009-12-04 08:40:51 +0000 | [diff] [blame] | 2742 | OverrideMethod(MD, MorallyVirtual, OverrideOffset, Offset, |
| 2743 | CurrentVBaseOffset); |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 2744 | } |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2745 | } |
| 2746 | } |
| 2747 | } |
| 2748 | |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 2749 | void AddMethod(const GlobalDecl GD, bool MorallyVirtual, Index_t Offset, |
Eli Friedman | 03aa2f1 | 2009-11-30 01:19:33 +0000 | [diff] [blame] | 2750 | int64_t CurrentVBaseOffset) { |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2751 | // If we can find a previously allocated slot for this, reuse it. |
Eli Friedman | 81fb0d2 | 2009-12-04 08:40:51 +0000 | [diff] [blame] | 2752 | if (OverrideMethod(GD, MorallyVirtual, Offset, Offset, |
Mike Stump | cd6f9ed | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 2753 | CurrentVBaseOffset)) |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2754 | return; |
| 2755 | |
Mike Stump | 1f49d65 | 2010-01-22 18:48:47 +0000 | [diff] [blame] | 2756 | D1(printf(" vfn for %s at %d\n", |
Douglas Gregor | 76eb74a | 2010-02-22 16:44:27 +0000 | [diff] [blame] | 2757 | dyn_cast<CXXMethodDecl>(GD.getDecl())->getNameAsString().c_str(), |
Mike Stump | 1f49d65 | 2010-01-22 18:48:47 +0000 | [diff] [blame] | 2758 | (int)Methods.size())); |
| 2759 | |
Anders Carlsson | cdf1898 | 2009-12-04 02:08:24 +0000 | [diff] [blame] | 2760 | // We didn't find an entry in the vtable that we could use, add a new |
| 2761 | // entry. |
| 2762 | Methods.AddMethod(GD); |
| 2763 | |
Mike Stump | a04ecfb | 2010-01-26 21:35:27 +0000 | [diff] [blame] | 2764 | VCallOffset[GD] = Offset/8 - CurrentVBaseOffset/8; |
| 2765 | |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2766 | if (MorallyVirtual) { |
Anders Carlsson | 7228117 | 2010-01-26 17:36:47 +0000 | [diff] [blame] | 2767 | GlobalDecl UGD = getUnique(GD); |
| 2768 | const CXXMethodDecl *UMD = cast<CXXMethodDecl>(UGD.getDecl()); |
| 2769 | |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2770 | assert(UMD && "final overrider not found"); |
| 2771 | |
| 2772 | Index_t &idx = VCall[UMD]; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2773 | // Allocate the first one, after that, we reuse the previous one. |
| 2774 | if (idx == 0) { |
Anders Carlsson | 7228117 | 2010-01-26 17:36:47 +0000 | [diff] [blame] | 2775 | VCallOffsetForVCall[UGD] = Offset/8; |
Mike Stump | a04ecfb | 2010-01-26 21:35:27 +0000 | [diff] [blame] | 2776 | NonVirtualOffset[UMD] = Offset/8 - CurrentVBaseOffset/8; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2777 | idx = VCalls.size()+1; |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2778 | VCalls.push_back(Offset/8 - CurrentVBaseOffset/8); |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2779 | D1(printf(" vcall for %s at %d with delta %d\n", |
Douglas Gregor | 76eb74a | 2010-02-22 16:44:27 +0000 | [diff] [blame] | 2780 | dyn_cast<CXXMethodDecl>(GD.getDecl())->getNameAsString().c_str(), |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 2781 | (int)-VCalls.size()-3, (int)VCalls[idx-1])); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2782 | } |
| 2783 | } |
| 2784 | } |
| 2785 | |
| 2786 | void AddMethods(const CXXRecordDecl *RD, bool MorallyVirtual, |
Eli Friedman | 03aa2f1 | 2009-11-30 01:19:33 +0000 | [diff] [blame] | 2787 | Index_t Offset, int64_t CurrentVBaseOffset) { |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2788 | for (method_iter mi = RD->method_begin(), me = RD->method_end(); mi != me; |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 2789 | ++mi) { |
| 2790 | const CXXMethodDecl *MD = *mi; |
| 2791 | if (!MD->isVirtual()) |
| 2792 | continue; |
| 2793 | |
| 2794 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(MD)) { |
| 2795 | // For destructors, add both the complete and the deleting destructor |
| 2796 | // to the vtable. |
| 2797 | AddMethod(GlobalDecl(DD, Dtor_Complete), MorallyVirtual, Offset, |
Mike Stump | cd6f9ed | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 2798 | CurrentVBaseOffset); |
Eli Friedman | 03aa2f1 | 2009-11-30 01:19:33 +0000 | [diff] [blame] | 2799 | AddMethod(GlobalDecl(DD, Dtor_Deleting), MorallyVirtual, Offset, |
| 2800 | CurrentVBaseOffset); |
| 2801 | } else |
| 2802 | AddMethod(MD, MorallyVirtual, Offset, CurrentVBaseOffset); |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 2803 | } |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2804 | } |
| 2805 | |
| 2806 | void NonVirtualBases(const CXXRecordDecl *RD, const ASTRecordLayout &Layout, |
| 2807 | const CXXRecordDecl *PrimaryBase, |
| 2808 | bool PrimaryBaseWasVirtual, bool MorallyVirtual, |
Mike Stump | cd6f9ed | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 2809 | int64_t Offset, int64_t CurrentVBaseOffset, |
| 2810 | Path_t *Path) { |
Mike Stump | 37dbe96 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 2811 | Path->push_back(std::make_pair(RD, Offset)); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2812 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 2813 | e = RD->bases_end(); i != e; ++i) { |
| 2814 | if (i->isVirtual()) |
| 2815 | continue; |
| 2816 | const CXXRecordDecl *Base = |
| 2817 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 2818 | uint64_t o = Offset + Layout.getBaseClassOffset(Base); |
| 2819 | StartNewTable(); |
| 2820 | GenerateVtableForBase(Base, o, MorallyVirtual, false, |
| 2821 | true, Base == PrimaryBase && !PrimaryBaseWasVirtual, |
| 2822 | CurrentVBaseOffset, Path); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2823 | } |
Mike Stump | 37dbe96 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 2824 | Path->pop_back(); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2825 | } |
| 2826 | |
Mike Stump | b21c4ee | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 2827 | // #define D(X) do { X; } while (0) |
| 2828 | #define D(X) |
| 2829 | |
| 2830 | void insertVCalls(int InsertionPoint) { |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2831 | D1(printf("============= combining vbase/vcall\n")); |
Mike Stump | b21c4ee | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 2832 | D(VCalls.insert(VCalls.begin(), 673)); |
| 2833 | D(VCalls.push_back(672)); |
Eli Friedman | 6c08ce7 | 2009-12-05 01:05:03 +0000 | [diff] [blame] | 2834 | |
Anders Carlsson | fe5f7d9 | 2009-12-06 01:09:21 +0000 | [diff] [blame] | 2835 | VtableComponents.insert(VtableComponents.begin() + InsertionPoint, |
| 2836 | VCalls.size(), 0); |
Eli Friedman | 6c08ce7 | 2009-12-05 01:05:03 +0000 | [diff] [blame] | 2837 | if (BuildVtable) { |
| 2838 | // The vcalls come first... |
| 2839 | for (std::vector<Index_t>::reverse_iterator i = VCalls.rbegin(), |
| 2840 | e = VCalls.rend(); |
| 2841 | i != e; ++i) |
Anders Carlsson | fe5f7d9 | 2009-12-06 01:09:21 +0000 | [diff] [blame] | 2842 | VtableComponents[InsertionPoint++] = wrap((0?600:0) + *i); |
Eli Friedman | 6c08ce7 | 2009-12-05 01:05:03 +0000 | [diff] [blame] | 2843 | } |
Mike Stump | b21c4ee | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 2844 | VCalls.clear(); |
Mike Stump | 9f23a14 | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 2845 | VCall.clear(); |
Mike Stump | a04ecfb | 2010-01-26 21:35:27 +0000 | [diff] [blame] | 2846 | VCallOffsetForVCall.clear(); |
| 2847 | VCallOffset.clear(); |
| 2848 | NonVirtualOffset.clear(); |
Mike Stump | b21c4ee | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 2849 | } |
| 2850 | |
Mike Stump | 559387f | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 2851 | void AddAddressPoints(const CXXRecordDecl *RD, uint64_t Offset, |
| 2852 | Index_t AddressPoint) { |
| 2853 | D1(printf("XXX address point for %s in %s layout %s at offset %d is %d\n", |
Mike Stump | d280844 | 2010-01-22 02:51:26 +0000 | [diff] [blame] | 2854 | RD->getNameAsCString(), MostDerivedClass->getNameAsCString(), |
Mike Stump | 559387f | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 2855 | LayoutClass->getNameAsCString(), (int)Offset, (int)AddressPoint)); |
Mike Stump | cd2b821 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 2856 | subAddressPoints[std::make_pair(RD, Offset)] = AddressPoint; |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 2857 | AddressPoints[BaseSubobject(RD, Offset)] = AddressPoint; |
Mike Stump | 559387f | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 2858 | |
| 2859 | // Now also add the address point for all our primary bases. |
| 2860 | while (1) { |
| 2861 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 2862 | RD = Layout.getPrimaryBase(); |
| 2863 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 2864 | // FIXME: Double check this. |
| 2865 | if (RD == 0) |
| 2866 | break; |
| 2867 | if (PrimaryBaseWasVirtual && |
| 2868 | BLayout.getVBaseClassOffset(RD) != Offset) |
| 2869 | break; |
| 2870 | D1(printf("XXX address point for %s in %s layout %s at offset %d is %d\n", |
Mike Stump | d280844 | 2010-01-22 02:51:26 +0000 | [diff] [blame] | 2871 | RD->getNameAsCString(), MostDerivedClass->getNameAsCString(), |
Mike Stump | 559387f | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 2872 | LayoutClass->getNameAsCString(), (int)Offset, (int)AddressPoint)); |
Mike Stump | cd2b821 | 2009-11-19 20:52:19 +0000 | [diff] [blame] | 2873 | subAddressPoints[std::make_pair(RD, Offset)] = AddressPoint; |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 2874 | AddressPoints[BaseSubobject(RD, Offset)] = AddressPoint; |
Mike Stump | 559387f | 2009-11-13 23:13:20 +0000 | [diff] [blame] | 2875 | } |
| 2876 | } |
| 2877 | |
| 2878 | |
Mike Stump | d538a6d | 2009-12-24 07:29:41 +0000 | [diff] [blame] | 2879 | void FinishGenerateVtable(const CXXRecordDecl *RD, |
| 2880 | const ASTRecordLayout &Layout, |
| 2881 | const CXXRecordDecl *PrimaryBase, |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 2882 | bool ForNPNVBases, bool WasPrimaryBase, |
Mike Stump | d538a6d | 2009-12-24 07:29:41 +0000 | [diff] [blame] | 2883 | bool PrimaryBaseWasVirtual, |
| 2884 | bool MorallyVirtual, int64_t Offset, |
| 2885 | bool ForVirtualBase, int64_t CurrentVBaseOffset, |
| 2886 | Path_t *Path) { |
Mike Stump | 37dbe96 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 2887 | bool alloc = false; |
| 2888 | if (Path == 0) { |
| 2889 | alloc = true; |
| 2890 | Path = new Path_t; |
| 2891 | } |
| 2892 | |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2893 | StartNewTable(); |
| 2894 | extra = 0; |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 2895 | Index_t AddressPoint = 0; |
| 2896 | int VCallInsertionPoint = 0; |
| 2897 | if (!ForNPNVBases || !WasPrimaryBase) { |
| 2898 | bool DeferVCalls = MorallyVirtual || ForVirtualBase; |
| 2899 | VCallInsertionPoint = VtableComponents.size(); |
| 2900 | if (!DeferVCalls) { |
| 2901 | insertVCalls(VCallInsertionPoint); |
| 2902 | } else |
| 2903 | // FIXME: just for extra, or for all uses of VCalls.size post this? |
| 2904 | extra = -VCalls.size(); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2905 | |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 2906 | // Add the offset to top. |
| 2907 | VtableComponents.push_back(BuildVtable ? wrap(-((Offset-LayoutOffset)/8)) : 0); |
Anders Carlsson | 472404f | 2009-12-04 16:19:30 +0000 | [diff] [blame] | 2908 | |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 2909 | // Add the RTTI information. |
| 2910 | VtableComponents.push_back(rtti); |
Anders Carlsson | 472404f | 2009-12-04 16:19:30 +0000 | [diff] [blame] | 2911 | |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 2912 | AddressPoint = VtableComponents.size(); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2913 | |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 2914 | AppendMethodsToVtable(); |
| 2915 | } |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2916 | |
| 2917 | // and then the non-virtual bases. |
| 2918 | NonVirtualBases(RD, Layout, PrimaryBase, PrimaryBaseWasVirtual, |
Mike Stump | cd6f9ed | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 2919 | MorallyVirtual, Offset, CurrentVBaseOffset, Path); |
Mike Stump | b21c4ee | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 2920 | |
| 2921 | if (ForVirtualBase) { |
Mike Stump | 2cefe38 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 2922 | // FIXME: We're adding to VCalls in callers, we need to do the overrides |
| 2923 | // in the inner part, so that we know the complete set of vcalls during |
| 2924 | // the build and don't have to insert into methods. Saving out the |
| 2925 | // AddressPoint here, would need to be fixed, if we didn't do that. Also |
| 2926 | // retroactively adding vcalls for overrides later wind up in the wrong |
| 2927 | // place, the vcall slot has to be alloted during the walk of the base |
| 2928 | // when the function is first introduces. |
Mike Stump | b21c4ee | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 2929 | AddressPoint += VCalls.size(); |
Mike Stump | 2cefe38 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 2930 | insertVCalls(VCallInsertionPoint); |
Mike Stump | b21c4ee | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 2931 | } |
| 2932 | |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 2933 | if (!ForNPNVBases || !WasPrimaryBase) |
| 2934 | AddAddressPoints(RD, Offset, AddressPoint); |
Mike Stump | 2cefe38 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 2935 | |
Mike Stump | 37dbe96 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 2936 | if (alloc) { |
| 2937 | delete Path; |
| 2938 | } |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2939 | } |
| 2940 | |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2941 | void Primaries(const CXXRecordDecl *RD, bool MorallyVirtual, int64_t Offset, |
| 2942 | bool updateVBIndex, Index_t current_vbindex, |
Eli Friedman | 03aa2f1 | 2009-11-30 01:19:33 +0000 | [diff] [blame] | 2943 | int64_t CurrentVBaseOffset) { |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2944 | if (!RD->isDynamicClass()) |
| 2945 | return; |
| 2946 | |
| 2947 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 2948 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 2949 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 2950 | |
| 2951 | // vtables are composed from the chain of primaries. |
Eli Friedman | 65d8722 | 2009-12-04 08:52:11 +0000 | [diff] [blame] | 2952 | if (PrimaryBase && !PrimaryBaseWasVirtual) { |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2953 | D1(printf(" doing primaries for %s most derived %s\n", |
Mike Stump | d280844 | 2010-01-22 02:51:26 +0000 | [diff] [blame] | 2954 | RD->getNameAsCString(), MostDerivedClass->getNameAsCString())); |
Eli Friedman | 65d8722 | 2009-12-04 08:52:11 +0000 | [diff] [blame] | 2955 | Primaries(PrimaryBase, PrimaryBaseWasVirtual|MorallyVirtual, Offset, |
| 2956 | updateVBIndex, current_vbindex, CurrentVBaseOffset); |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2957 | } |
| 2958 | |
| 2959 | D1(printf(" doing vcall entries for %s most derived %s\n", |
Mike Stump | d280844 | 2010-01-22 02:51:26 +0000 | [diff] [blame] | 2960 | RD->getNameAsCString(), MostDerivedClass->getNameAsCString())); |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2961 | |
| 2962 | // And add the virtuals for the class to the primary vtable. |
Eli Friedman | 03aa2f1 | 2009-11-30 01:19:33 +0000 | [diff] [blame] | 2963 | AddMethods(RD, MorallyVirtual, Offset, CurrentVBaseOffset); |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2964 | } |
| 2965 | |
| 2966 | void VBPrimaries(const CXXRecordDecl *RD, bool MorallyVirtual, int64_t Offset, |
| 2967 | bool updateVBIndex, Index_t current_vbindex, |
Mike Stump | cd6f9ed | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 2968 | bool RDisVirtualBase, int64_t CurrentVBaseOffset, |
Eli Friedman | 03aa2f1 | 2009-11-30 01:19:33 +0000 | [diff] [blame] | 2969 | bool bottom) { |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2970 | if (!RD->isDynamicClass()) |
| 2971 | return; |
| 2972 | |
| 2973 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 2974 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 2975 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 2976 | |
| 2977 | // vtables are composed from the chain of primaries. |
| 2978 | if (PrimaryBase) { |
Mike Stump | cd6f9ed | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 2979 | int BaseCurrentVBaseOffset = CurrentVBaseOffset; |
| 2980 | if (PrimaryBaseWasVirtual) { |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2981 | IndirectPrimary.insert(PrimaryBase); |
Mike Stump | cd6f9ed | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 2982 | BaseCurrentVBaseOffset = BLayout.getVBaseClassOffset(PrimaryBase); |
| 2983 | } |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2984 | |
| 2985 | D1(printf(" doing primaries for %s most derived %s\n", |
Mike Stump | d280844 | 2010-01-22 02:51:26 +0000 | [diff] [blame] | 2986 | RD->getNameAsCString(), MostDerivedClass->getNameAsCString())); |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2987 | |
| 2988 | VBPrimaries(PrimaryBase, PrimaryBaseWasVirtual|MorallyVirtual, Offset, |
Mike Stump | cd6f9ed | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 2989 | updateVBIndex, current_vbindex, PrimaryBaseWasVirtual, |
Eli Friedman | 03aa2f1 | 2009-11-30 01:19:33 +0000 | [diff] [blame] | 2990 | BaseCurrentVBaseOffset, false); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 2991 | } |
| 2992 | |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2993 | D1(printf(" doing vbase entries for %s most derived %s\n", |
Mike Stump | d280844 | 2010-01-22 02:51:26 +0000 | [diff] [blame] | 2994 | RD->getNameAsCString(), MostDerivedClass->getNameAsCString())); |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 2995 | GenerateVBaseOffsets(RD, Offset, updateVBIndex, current_vbindex); |
| 2996 | |
| 2997 | if (RDisVirtualBase || bottom) { |
| 2998 | Primaries(RD, MorallyVirtual, Offset, updateVBIndex, current_vbindex, |
Eli Friedman | 03aa2f1 | 2009-11-30 01:19:33 +0000 | [diff] [blame] | 2999 | CurrentVBaseOffset); |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 3000 | } |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3001 | } |
| 3002 | |
Mike Stump | d538a6d | 2009-12-24 07:29:41 +0000 | [diff] [blame] | 3003 | void GenerateVtableForBase(const CXXRecordDecl *RD, int64_t Offset = 0, |
| 3004 | bool MorallyVirtual = false, |
| 3005 | bool ForVirtualBase = false, |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 3006 | bool ForNPNVBases = false, |
| 3007 | bool WasPrimaryBase = true, |
Mike Stump | d538a6d | 2009-12-24 07:29:41 +0000 | [diff] [blame] | 3008 | int CurrentVBaseOffset = 0, |
| 3009 | Path_t *Path = 0) { |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3010 | if (!RD->isDynamicClass()) |
Mike Stump | d538a6d | 2009-12-24 07:29:41 +0000 | [diff] [blame] | 3011 | return; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3012 | |
Mike Stump | fa81808 | 2009-11-13 02:35:38 +0000 | [diff] [blame] | 3013 | // Construction vtable don't need parts that have no virtual bases and |
| 3014 | // aren't morally virtual. |
Anders Carlsson | bad80eb | 2009-12-04 18:36:22 +0000 | [diff] [blame] | 3015 | if ((LayoutClass != MostDerivedClass) && |
| 3016 | RD->getNumVBases() == 0 && !MorallyVirtual) |
Mike Stump | d538a6d | 2009-12-24 07:29:41 +0000 | [diff] [blame] | 3017 | return; |
Mike Stump | fa81808 | 2009-11-13 02:35:38 +0000 | [diff] [blame] | 3018 | |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3019 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 3020 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 3021 | const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual(); |
| 3022 | |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3023 | extra = 0; |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 3024 | D1(printf("building entries for base %s most derived %s\n", |
Mike Stump | d280844 | 2010-01-22 02:51:26 +0000 | [diff] [blame] | 3025 | RD->getNameAsCString(), MostDerivedClass->getNameAsCString())); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3026 | |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 3027 | if (ForVirtualBase) |
| 3028 | extra = VCalls.size(); |
| 3029 | |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 3030 | if (!ForNPNVBases || !WasPrimaryBase) { |
| 3031 | VBPrimaries(RD, MorallyVirtual, Offset, !ForVirtualBase, 0, |
| 3032 | ForVirtualBase, CurrentVBaseOffset, true); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3033 | |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 3034 | if (Path) |
| 3035 | OverrideMethods(Path, MorallyVirtual, Offset, CurrentVBaseOffset); |
| 3036 | } |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3037 | |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 3038 | FinishGenerateVtable(RD, Layout, PrimaryBase, ForNPNVBases, WasPrimaryBase, |
| 3039 | PrimaryBaseWasVirtual, MorallyVirtual, Offset, |
| 3040 | ForVirtualBase, CurrentVBaseOffset, Path); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3041 | } |
| 3042 | |
| 3043 | void GenerateVtableForVBases(const CXXRecordDecl *RD, |
| 3044 | int64_t Offset = 0, |
Mike Stump | 37dbe96 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 3045 | Path_t *Path = 0) { |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3046 | bool alloc = false; |
| 3047 | if (Path == 0) { |
| 3048 | alloc = true; |
Mike Stump | 37dbe96 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 3049 | Path = new Path_t; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3050 | } |
| 3051 | // FIXME: We also need to override using all paths to a virtual base, |
| 3052 | // right now, we just process the first path |
| 3053 | Path->push_back(std::make_pair(RD, Offset)); |
| 3054 | for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(), |
| 3055 | e = RD->bases_end(); i != e; ++i) { |
| 3056 | const CXXRecordDecl *Base = |
| 3057 | cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl()); |
| 3058 | if (i->isVirtual() && !IndirectPrimary.count(Base)) { |
| 3059 | // Mark it so we don't output it twice. |
| 3060 | IndirectPrimary.insert(Base); |
| 3061 | StartNewTable(); |
Mike Stump | b21c4ee | 2009-10-14 18:14:51 +0000 | [diff] [blame] | 3062 | VCall.clear(); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3063 | int64_t BaseOffset = BLayout.getVBaseClassOffset(Base); |
Mike Stump | cd6f9ed | 2009-11-06 23:27:42 +0000 | [diff] [blame] | 3064 | int64_t CurrentVBaseOffset = BaseOffset; |
Mike Stump | 75ce573 | 2009-10-31 20:06:59 +0000 | [diff] [blame] | 3065 | D1(printf("vtable %s virtual base %s\n", |
Mike Stump | d280844 | 2010-01-22 02:51:26 +0000 | [diff] [blame] | 3066 | MostDerivedClass->getNameAsCString(), Base->getNameAsCString())); |
Mike Stump | 9eb76d4 | 2010-01-22 06:45:05 +0000 | [diff] [blame] | 3067 | GenerateVtableForBase(Base, BaseOffset, true, true, false, |
| 3068 | true, CurrentVBaseOffset, Path); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3069 | } |
Mike Stump | 2cefe38 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 3070 | int64_t BaseOffset; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3071 | if (i->isVirtual()) |
| 3072 | BaseOffset = BLayout.getVBaseClassOffset(Base); |
Mike Stump | 2cefe38 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 3073 | else { |
| 3074 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 3075 | BaseOffset = Offset + Layout.getBaseClassOffset(Base); |
| 3076 | } |
| 3077 | |
Mike Stump | 37dbe96 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 3078 | if (Base->getNumVBases()) { |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3079 | GenerateVtableForVBases(Base, BaseOffset, Path); |
Mike Stump | 37dbe96 | 2009-10-15 02:04:03 +0000 | [diff] [blame] | 3080 | } |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3081 | } |
| 3082 | Path->pop_back(); |
| 3083 | if (alloc) |
| 3084 | delete Path; |
| 3085 | } |
| 3086 | }; |
Anders Carlsson | ca1bf68 | 2009-12-03 01:54:02 +0000 | [diff] [blame] | 3087 | } // end anonymous namespace |
| 3088 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 3089 | bool OldVtableBuilder::OverrideMethod(GlobalDecl GD, bool MorallyVirtual, |
Eli Friedman | 81fb0d2 | 2009-12-04 08:40:51 +0000 | [diff] [blame] | 3090 | Index_t OverrideOffset, Index_t Offset, |
| 3091 | int64_t CurrentVBaseOffset) { |
Anders Carlsson | ca1bf68 | 2009-12-03 01:54:02 +0000 | [diff] [blame] | 3092 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); |
| 3093 | |
| 3094 | const bool isPure = MD->isPure(); |
Anders Carlsson | 21bbc1e | 2009-12-05 17:04:47 +0000 | [diff] [blame] | 3095 | |
Anders Carlsson | ca1bf68 | 2009-12-03 01:54:02 +0000 | [diff] [blame] | 3096 | // FIXME: Should OverrideOffset's be Offset? |
| 3097 | |
Anders Carlsson | 21bbc1e | 2009-12-05 17:04:47 +0000 | [diff] [blame] | 3098 | for (CXXMethodDecl::method_iterator mi = MD->begin_overridden_methods(), |
| 3099 | e = MD->end_overridden_methods(); mi != e; ++mi) { |
Anders Carlsson | ca1bf68 | 2009-12-03 01:54:02 +0000 | [diff] [blame] | 3100 | GlobalDecl OGD; |
Mike Stump | a04ecfb | 2010-01-26 21:35:27 +0000 | [diff] [blame] | 3101 | GlobalDecl OGD2; |
Anders Carlsson | ca1bf68 | 2009-12-03 01:54:02 +0000 | [diff] [blame] | 3102 | |
Anders Carlsson | f3935b4 | 2009-12-04 05:51:56 +0000 | [diff] [blame] | 3103 | const CXXMethodDecl *OMD = *mi; |
Anders Carlsson | ca1bf68 | 2009-12-03 01:54:02 +0000 | [diff] [blame] | 3104 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(OMD)) |
| 3105 | OGD = GlobalDecl(DD, GD.getDtorType()); |
| 3106 | else |
| 3107 | OGD = OMD; |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3108 | |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3109 | // Check whether this is the method being overridden in this section of |
| 3110 | // the vtable. |
Anders Carlsson | 7bb7076 | 2009-12-04 15:49:02 +0000 | [diff] [blame] | 3111 | uint64_t Index; |
| 3112 | if (!Methods.getIndex(OGD, Index)) |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3113 | continue; |
| 3114 | |
Mike Stump | a04ecfb | 2010-01-26 21:35:27 +0000 | [diff] [blame] | 3115 | OGD2 = OGD; |
| 3116 | |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3117 | // Get the original method, which we should be computing thunks, etc, |
| 3118 | // against. |
| 3119 | OGD = Methods.getOrigMethod(Index); |
| 3120 | OMD = cast<CXXMethodDecl>(OGD.getDecl()); |
| 3121 | |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3122 | QualType ReturnType = |
| 3123 | MD->getType()->getAs<FunctionType>()->getResultType(); |
| 3124 | QualType OverriddenReturnType = |
| 3125 | OMD->getType()->getAs<FunctionType>()->getResultType(); |
Anders Carlsson | ca1bf68 | 2009-12-03 01:54:02 +0000 | [diff] [blame] | 3126 | |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3127 | // Check if we need a return type adjustment. |
Anders Carlsson | cce9ee8 | 2010-02-13 23:17:31 +0000 | [diff] [blame] | 3128 | if (!ComputeReturnAdjustmentBaseOffset(CGM.getContext(), MD, |
| 3129 | OMD).isEmpty()) { |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3130 | CanQualType &BaseReturnType = BaseReturnTypes[Index]; |
Anders Carlsson | ca1bf68 | 2009-12-03 01:54:02 +0000 | [diff] [blame] | 3131 | |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3132 | // Insert the base return type. |
| 3133 | if (BaseReturnType.isNull()) |
| 3134 | BaseReturnType = |
| 3135 | CGM.getContext().getCanonicalType(OverriddenReturnType); |
| 3136 | } |
Anders Carlsson | a93e980 | 2009-12-04 03:52:52 +0000 | [diff] [blame] | 3137 | |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3138 | Methods.OverrideMethod(OGD, GD); |
| 3139 | |
Anders Carlsson | 7228117 | 2010-01-26 17:36:47 +0000 | [diff] [blame] | 3140 | GlobalDecl UGD = getUnique(GD); |
| 3141 | const CXXMethodDecl *UMD = cast<CXXMethodDecl>(UGD.getDecl()); |
| 3142 | assert(UGD.getDecl() && "unique overrider not found"); |
| 3143 | assert(UGD == getUnique(OGD) && "unique overrider not unique"); |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 3144 | |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3145 | ThisAdjustments.erase(Index); |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 3146 | if (MorallyVirtual || VCall.count(UMD)) { |
Mike Stump | a04ecfb | 2010-01-26 21:35:27 +0000 | [diff] [blame] | 3147 | |
Mike Stump | 90181eb | 2010-01-26 00:05:04 +0000 | [diff] [blame] | 3148 | Index_t &idx = VCall[UMD]; |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3149 | if (idx == 0) { |
Mike Stump | a04ecfb | 2010-01-26 21:35:27 +0000 | [diff] [blame] | 3150 | VCallOffset[GD] = VCallOffset[OGD]; |
| 3151 | // NonVirtualOffset[UMD] = CurrentVBaseOffset/8 - OverrideOffset/8; |
| 3152 | NonVirtualOffset[UMD] = VCallOffset[OGD]; |
Mike Stump | 77537b1 | 2010-01-26 03:42:22 +0000 | [diff] [blame] | 3153 | VCallOffsetForVCall[UMD] = OverrideOffset/8; |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3154 | idx = VCalls.size()+1; |
Mike Stump | 77537b1 | 2010-01-26 03:42:22 +0000 | [diff] [blame] | 3155 | VCalls.push_back(OverrideOffset/8 - CurrentVBaseOffset/8); |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3156 | D1(printf(" vcall for %s at %d with delta %d most derived %s\n", |
| 3157 | MD->getNameAsString().c_str(), (int)-idx-3, |
Mike Stump | d280844 | 2010-01-22 02:51:26 +0000 | [diff] [blame] | 3158 | (int)VCalls[idx-1], MostDerivedClass->getNameAsCString())); |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3159 | } else { |
Mike Stump | a04ecfb | 2010-01-26 21:35:27 +0000 | [diff] [blame] | 3160 | VCallOffset[GD] = NonVirtualOffset[UMD]; |
Anders Carlsson | 7228117 | 2010-01-26 17:36:47 +0000 | [diff] [blame] | 3161 | VCalls[idx-1] = -VCallOffsetForVCall[UGD] + OverrideOffset/8; |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3162 | D1(printf(" vcall patch for %s at %d with delta %d most derived %s\n", |
| 3163 | MD->getNameAsString().c_str(), (int)-idx-3, |
Mike Stump | d280844 | 2010-01-22 02:51:26 +0000 | [diff] [blame] | 3164 | (int)VCalls[idx-1], MostDerivedClass->getNameAsCString())); |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3165 | } |
Mike Stump | a04ecfb | 2010-01-26 21:35:27 +0000 | [diff] [blame] | 3166 | int64_t NonVirtualAdjustment = -VCallOffset[OGD]; |
Mike Stump | ded0a40 | 2010-01-26 22:44:01 +0000 | [diff] [blame] | 3167 | QualType DerivedType = MD->getThisType(CGM.getContext()); |
| 3168 | QualType BaseType = cast<const CXXMethodDecl>(OGD.getDecl())->getThisType(CGM.getContext()); |
| 3169 | int64_t NonVirtualAdjustment2 = -(getNVOffset(BaseType, DerivedType)/8); |
| 3170 | if (NonVirtualAdjustment2 != NonVirtualAdjustment) { |
| 3171 | NonVirtualAdjustment = NonVirtualAdjustment2; |
| 3172 | } |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3173 | int64_t VirtualAdjustment = |
| 3174 | -((idx + extra + 2) * LLVMPointerWidth / 8); |
Anders Carlsson | 657f139 | 2009-12-03 02:32:59 +0000 | [diff] [blame] | 3175 | |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3176 | // Optimize out virtual adjustments of 0. |
| 3177 | if (VCalls[idx-1] == 0) |
| 3178 | VirtualAdjustment = 0; |
Anders Carlsson | 657f139 | 2009-12-03 02:32:59 +0000 | [diff] [blame] | 3179 | |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3180 | ThunkAdjustment ThisAdjustment(NonVirtualAdjustment, |
| 3181 | VirtualAdjustment); |
Anders Carlsson | 2ca285f | 2009-12-03 02:22:59 +0000 | [diff] [blame] | 3182 | |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3183 | if (!isPure && !ThisAdjustment.isEmpty()) { |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3184 | ThisAdjustments[Index] = ThisAdjustment; |
Eli Friedman | 31bc3ad | 2009-12-07 23:56:34 +0000 | [diff] [blame] | 3185 | SavedAdjustments.push_back( |
| 3186 | std::make_pair(GD, std::make_pair(OGD, ThisAdjustment))); |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3187 | } |
Anders Carlsson | ca1bf68 | 2009-12-03 01:54:02 +0000 | [diff] [blame] | 3188 | return true; |
| 3189 | } |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3190 | |
Mike Stump | a04ecfb | 2010-01-26 21:35:27 +0000 | [diff] [blame] | 3191 | VCallOffset[GD] = VCallOffset[OGD2] - OverrideOffset/8; |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3192 | |
Mike Stump | a04ecfb | 2010-01-26 21:35:27 +0000 | [diff] [blame] | 3193 | int64_t NonVirtualAdjustment = -VCallOffset[GD]; |
| 3194 | QualType DerivedType = MD->getThisType(CGM.getContext()); |
| 3195 | QualType BaseType = cast<const CXXMethodDecl>(OGD.getDecl())->getThisType(CGM.getContext()); |
| 3196 | int64_t NonVirtualAdjustment2 = -(getNVOffset(BaseType, DerivedType)/8); |
| 3197 | if (NonVirtualAdjustment2 != NonVirtualAdjustment) { |
| 3198 | NonVirtualAdjustment = NonVirtualAdjustment2; |
| 3199 | } |
| 3200 | |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3201 | if (NonVirtualAdjustment) { |
| 3202 | ThunkAdjustment ThisAdjustment(NonVirtualAdjustment, 0); |
| 3203 | |
Eli Friedman | f2eda5e | 2009-12-06 22:33:51 +0000 | [diff] [blame] | 3204 | if (!isPure) { |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3205 | ThisAdjustments[Index] = ThisAdjustment; |
Eli Friedman | 31bc3ad | 2009-12-07 23:56:34 +0000 | [diff] [blame] | 3206 | SavedAdjustments.push_back( |
| 3207 | std::make_pair(GD, std::make_pair(OGD, ThisAdjustment))); |
Eli Friedman | f2eda5e | 2009-12-06 22:33:51 +0000 | [diff] [blame] | 3208 | } |
Eli Friedman | 3d2e9de | 2009-12-04 08:34:14 +0000 | [diff] [blame] | 3209 | } |
| 3210 | return true; |
Anders Carlsson | ca1bf68 | 2009-12-03 01:54:02 +0000 | [diff] [blame] | 3211 | } |
| 3212 | |
| 3213 | return false; |
Anders Carlsson | d5988502 | 2009-11-27 22:21:51 +0000 | [diff] [blame] | 3214 | } |
| 3215 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 3216 | void OldVtableBuilder::AppendMethodsToVtable() { |
Eli Friedman | 6c08ce7 | 2009-12-05 01:05:03 +0000 | [diff] [blame] | 3217 | if (!BuildVtable) { |
Anders Carlsson | fe5f7d9 | 2009-12-06 01:09:21 +0000 | [diff] [blame] | 3218 | VtableComponents.insert(VtableComponents.end(), Methods.size(), |
| 3219 | (llvm::Constant *)0); |
Eli Friedman | 6c08ce7 | 2009-12-05 01:05:03 +0000 | [diff] [blame] | 3220 | ThisAdjustments.clear(); |
| 3221 | BaseReturnTypes.clear(); |
| 3222 | Methods.clear(); |
| 3223 | return; |
| 3224 | } |
| 3225 | |
Anders Carlsson | 472404f | 2009-12-04 16:19:30 +0000 | [diff] [blame] | 3226 | // Reserve room in the vtable for our new methods. |
Anders Carlsson | fe5f7d9 | 2009-12-06 01:09:21 +0000 | [diff] [blame] | 3227 | VtableComponents.reserve(VtableComponents.size() + Methods.size()); |
Anders Carlsson | b07567c | 2009-12-04 03:07:26 +0000 | [diff] [blame] | 3228 | |
Anders Carlsson | 86809cd | 2009-12-04 02:43:50 +0000 | [diff] [blame] | 3229 | for (unsigned i = 0, e = Methods.size(); i != e; ++i) { |
| 3230 | GlobalDecl GD = Methods[i]; |
Anders Carlsson | 5b3ea9b | 2009-12-04 02:52:22 +0000 | [diff] [blame] | 3231 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); |
| 3232 | |
| 3233 | // Get the 'this' pointer adjustment. |
Anders Carlsson | 86809cd | 2009-12-04 02:43:50 +0000 | [diff] [blame] | 3234 | ThunkAdjustment ThisAdjustment = ThisAdjustments.lookup(i); |
Anders Carlsson | 5b3ea9b | 2009-12-04 02:52:22 +0000 | [diff] [blame] | 3235 | |
| 3236 | // Construct the return type adjustment. |
| 3237 | ThunkAdjustment ReturnAdjustment; |
| 3238 | |
| 3239 | QualType BaseReturnType = BaseReturnTypes.lookup(i); |
| 3240 | if (!BaseReturnType.isNull() && !MD->isPure()) { |
| 3241 | QualType DerivedType = |
| 3242 | MD->getType()->getAs<FunctionType>()->getResultType(); |
| 3243 | |
| 3244 | int64_t NonVirtualAdjustment = |
| 3245 | getNVOffset(BaseReturnType, DerivedType) / 8; |
| 3246 | |
| 3247 | int64_t VirtualAdjustment = |
| 3248 | getVbaseOffset(BaseReturnType, DerivedType); |
| 3249 | |
| 3250 | ReturnAdjustment = ThunkAdjustment(NonVirtualAdjustment, |
| 3251 | VirtualAdjustment); |
| 3252 | } |
| 3253 | |
Anders Carlsson | 50f1474 | 2009-12-04 03:06:03 +0000 | [diff] [blame] | 3254 | llvm::Constant *Method = 0; |
Anders Carlsson | 5b3ea9b | 2009-12-04 02:52:22 +0000 | [diff] [blame] | 3255 | if (!ReturnAdjustment.isEmpty()) { |
| 3256 | // Build a covariant thunk. |
| 3257 | CovariantThunkAdjustment Adjustment(ThisAdjustment, ReturnAdjustment); |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3258 | Method = wrap(CGM.GetAddrOfCovariantThunk(GD, Adjustment)); |
Anders Carlsson | 5b3ea9b | 2009-12-04 02:52:22 +0000 | [diff] [blame] | 3259 | } else if (!ThisAdjustment.isEmpty()) { |
| 3260 | // Build a "regular" thunk. |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3261 | Method = wrap(CGM.GetAddrOfThunk(GD, ThisAdjustment)); |
Anders Carlsson | ddf42c8 | 2009-12-04 02:56:03 +0000 | [diff] [blame] | 3262 | } else if (MD->isPure()) { |
| 3263 | // We have a pure virtual method. |
Anders Carlsson | 50f1474 | 2009-12-04 03:06:03 +0000 | [diff] [blame] | 3264 | Method = getPureVirtualFn(); |
| 3265 | } else { |
| 3266 | // We have a good old regular method. |
| 3267 | Method = WrapAddrOf(GD); |
Anders Carlsson | 5b3ea9b | 2009-12-04 02:52:22 +0000 | [diff] [blame] | 3268 | } |
Anders Carlsson | 50f1474 | 2009-12-04 03:06:03 +0000 | [diff] [blame] | 3269 | |
| 3270 | // Add the method to the vtable. |
Anders Carlsson | fe5f7d9 | 2009-12-06 01:09:21 +0000 | [diff] [blame] | 3271 | VtableComponents.push_back(Method); |
Anders Carlsson | 86809cd | 2009-12-04 02:43:50 +0000 | [diff] [blame] | 3272 | } |
| 3273 | |
Anders Carlsson | 50f1474 | 2009-12-04 03:06:03 +0000 | [diff] [blame] | 3274 | |
Anders Carlsson | 86809cd | 2009-12-04 02:43:50 +0000 | [diff] [blame] | 3275 | ThisAdjustments.clear(); |
Anders Carlsson | 5b3ea9b | 2009-12-04 02:52:22 +0000 | [diff] [blame] | 3276 | BaseReturnTypes.clear(); |
Anders Carlsson | 86809cd | 2009-12-04 02:43:50 +0000 | [diff] [blame] | 3277 | |
Anders Carlsson | 495634e | 2009-12-04 02:39:04 +0000 | [diff] [blame] | 3278 | Methods.clear(); |
Anders Carlsson | 495634e | 2009-12-04 02:39:04 +0000 | [diff] [blame] | 3279 | } |
| 3280 | |
Anders Carlsson | f942ee0 | 2009-11-27 20:47:55 +0000 | [diff] [blame] | 3281 | void CGVtableInfo::ComputeMethodVtableIndices(const CXXRecordDecl *RD) { |
| 3282 | |
| 3283 | // Itanium C++ ABI 2.5.2: |
Anders Carlsson | 259688c | 2010-02-02 03:37:46 +0000 | [diff] [blame] | 3284 | // The order of the virtual function pointers in a virtual table is the |
| 3285 | // order of declaration of the corresponding member functions in the class. |
Anders Carlsson | f942ee0 | 2009-11-27 20:47:55 +0000 | [diff] [blame] | 3286 | // |
Anders Carlsson | 259688c | 2010-02-02 03:37:46 +0000 | [diff] [blame] | 3287 | // There is an entry for any virtual function declared in a class, |
| 3288 | // whether it is a new function or overrides a base class function, |
| 3289 | // unless it overrides a function from the primary base, and conversion |
| 3290 | // between their return types does not require an adjustment. |
Anders Carlsson | f942ee0 | 2009-11-27 20:47:55 +0000 | [diff] [blame] | 3291 | |
| 3292 | int64_t CurrentIndex = 0; |
| 3293 | |
| 3294 | const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD); |
| 3295 | const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase(); |
| 3296 | |
| 3297 | if (PrimaryBase) { |
Anders Carlsson | c920fa2 | 2009-11-30 19:43:26 +0000 | [diff] [blame] | 3298 | assert(PrimaryBase->isDefinition() && |
| 3299 | "Should have the definition decl of the primary base!"); |
Anders Carlsson | f942ee0 | 2009-11-27 20:47:55 +0000 | [diff] [blame] | 3300 | |
| 3301 | // Since the record decl shares its vtable pointer with the primary base |
| 3302 | // we need to start counting at the end of the primary base's vtable. |
| 3303 | CurrentIndex = getNumVirtualFunctionPointers(PrimaryBase); |
| 3304 | } |
Eli Friedman | 2151725 | 2009-12-15 03:31:17 +0000 | [diff] [blame] | 3305 | |
| 3306 | // Collect all the primary bases, so we can check whether methods override |
| 3307 | // a method from the base. |
Anders Carlsson | d46ed89 | 2010-02-27 16:18:19 +0000 | [diff] [blame] | 3308 | VtableBuilder::PrimaryBasesSetVectorTy PrimaryBases; |
Eli Friedman | 2151725 | 2009-12-15 03:31:17 +0000 | [diff] [blame] | 3309 | for (ASTRecordLayout::primary_base_info_iterator |
| 3310 | I = Layout.primary_base_begin(), E = Layout.primary_base_end(); |
| 3311 | I != E; ++I) |
| 3312 | PrimaryBases.insert((*I).getBase()); |
| 3313 | |
Anders Carlsson | f942ee0 | 2009-11-27 20:47:55 +0000 | [diff] [blame] | 3314 | const CXXDestructorDecl *ImplicitVirtualDtor = 0; |
| 3315 | |
| 3316 | for (CXXRecordDecl::method_iterator i = RD->method_begin(), |
| 3317 | e = RD->method_end(); i != e; ++i) { |
| 3318 | const CXXMethodDecl *MD = *i; |
| 3319 | |
| 3320 | // We only want virtual methods. |
| 3321 | if (!MD->isVirtual()) |
| 3322 | continue; |
| 3323 | |
Anders Carlsson | f942ee0 | 2009-11-27 20:47:55 +0000 | [diff] [blame] | 3324 | // Check if this method overrides a method in the primary base. |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 3325 | if (const CXXMethodDecl *OverriddenMD = |
Anders Carlsson | d202541 | 2010-02-27 06:38:03 +0000 | [diff] [blame] | 3326 | OverridesMethodInBases(MD, PrimaryBases)) { |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 3327 | // Check if converting from the return type of the method to the |
| 3328 | // return type of the overridden method requires conversion. |
Anders Carlsson | cce9ee8 | 2010-02-13 23:17:31 +0000 | [diff] [blame] | 3329 | if (ComputeReturnAdjustmentBaseOffset(CGM.getContext(), MD, |
| 3330 | OverriddenMD).isEmpty()) { |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 3331 | // This index is shared between the index in the vtable of the primary |
| 3332 | // base class. |
| 3333 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(MD)) { |
| 3334 | const CXXDestructorDecl *OverriddenDD = |
| 3335 | cast<CXXDestructorDecl>(OverriddenMD); |
Anders Carlsson | f942ee0 | 2009-11-27 20:47:55 +0000 | [diff] [blame] | 3336 | |
Anders Carlsson | 65b4978 | 2010-02-12 05:25:12 +0000 | [diff] [blame] | 3337 | // Add both the complete and deleting entries. |
| 3338 | MethodVtableIndices[GlobalDecl(DD, Dtor_Complete)] = |
| 3339 | getMethodVtableIndex(GlobalDecl(OverriddenDD, Dtor_Complete)); |
| 3340 | MethodVtableIndices[GlobalDecl(DD, Dtor_Deleting)] = |
| 3341 | getMethodVtableIndex(GlobalDecl(OverriddenDD, Dtor_Deleting)); |
| 3342 | } else { |
| 3343 | MethodVtableIndices[MD] = getMethodVtableIndex(OverriddenMD); |
| 3344 | } |
| 3345 | |
| 3346 | // We don't need to add an entry for this method. |
Anders Carlsson | 0760481 | 2010-02-12 18:14:46 +0000 | [diff] [blame] | 3347 | continue; |
Anders Carlsson | f942ee0 | 2009-11-27 20:47:55 +0000 | [diff] [blame] | 3348 | } |
| 3349 | } |
| 3350 | |
Anders Carlsson | f942ee0 | 2009-11-27 20:47:55 +0000 | [diff] [blame] | 3351 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(MD)) { |
| 3352 | if (MD->isImplicit()) { |
| 3353 | assert(!ImplicitVirtualDtor && |
| 3354 | "Did already see an implicit virtual dtor!"); |
| 3355 | ImplicitVirtualDtor = DD; |
| 3356 | continue; |
| 3357 | } |
| 3358 | |
| 3359 | // Add the complete dtor. |
| 3360 | MethodVtableIndices[GlobalDecl(DD, Dtor_Complete)] = CurrentIndex++; |
| 3361 | |
| 3362 | // Add the deleting dtor. |
| 3363 | MethodVtableIndices[GlobalDecl(DD, Dtor_Deleting)] = CurrentIndex++; |
| 3364 | } else { |
| 3365 | // Add the entry. |
| 3366 | MethodVtableIndices[MD] = CurrentIndex++; |
| 3367 | } |
| 3368 | } |
| 3369 | |
| 3370 | if (ImplicitVirtualDtor) { |
| 3371 | // Itanium C++ ABI 2.5.2: |
Anders Carlsson | dc2dba3 | 2010-02-16 04:49:44 +0000 | [diff] [blame] | 3372 | // If a class has an implicitly-defined virtual destructor, |
| 3373 | // its entries come after the declared virtual function pointers. |
Anders Carlsson | f942ee0 | 2009-11-27 20:47:55 +0000 | [diff] [blame] | 3374 | |
| 3375 | // Add the complete dtor. |
| 3376 | MethodVtableIndices[GlobalDecl(ImplicitVirtualDtor, Dtor_Complete)] = |
| 3377 | CurrentIndex++; |
| 3378 | |
| 3379 | // Add the deleting dtor. |
| 3380 | MethodVtableIndices[GlobalDecl(ImplicitVirtualDtor, Dtor_Deleting)] = |
| 3381 | CurrentIndex++; |
| 3382 | } |
| 3383 | |
| 3384 | NumVirtualFunctionPointers[RD] = CurrentIndex; |
| 3385 | } |
| 3386 | |
| 3387 | uint64_t CGVtableInfo::getNumVirtualFunctionPointers(const CXXRecordDecl *RD) { |
| 3388 | llvm::DenseMap<const CXXRecordDecl *, uint64_t>::iterator I = |
| 3389 | NumVirtualFunctionPointers.find(RD); |
| 3390 | if (I != NumVirtualFunctionPointers.end()) |
| 3391 | return I->second; |
| 3392 | |
| 3393 | ComputeMethodVtableIndices(RD); |
| 3394 | |
| 3395 | I = NumVirtualFunctionPointers.find(RD); |
| 3396 | assert(I != NumVirtualFunctionPointers.end() && "Did not find entry!"); |
| 3397 | return I->second; |
| 3398 | } |
| 3399 | |
| 3400 | uint64_t CGVtableInfo::getMethodVtableIndex(GlobalDecl GD) { |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 3401 | MethodVtableIndicesTy::iterator I = MethodVtableIndices.find(GD); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3402 | if (I != MethodVtableIndices.end()) |
| 3403 | return I->second; |
| 3404 | |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 3405 | const CXXRecordDecl *RD = cast<CXXMethodDecl>(GD.getDecl())->getParent(); |
Anders Carlsson | f942ee0 | 2009-11-27 20:47:55 +0000 | [diff] [blame] | 3406 | |
| 3407 | ComputeMethodVtableIndices(RD); |
| 3408 | |
Anders Carlsson | fb4dda4 | 2009-11-13 17:08:56 +0000 | [diff] [blame] | 3409 | I = MethodVtableIndices.find(GD); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3410 | assert(I != MethodVtableIndices.end() && "Did not find index!"); |
| 3411 | return I->second; |
| 3412 | } |
| 3413 | |
Eli Friedman | 31bc3ad | 2009-12-07 23:56:34 +0000 | [diff] [blame] | 3414 | CGVtableInfo::AdjustmentVectorTy* |
| 3415 | CGVtableInfo::getAdjustments(GlobalDecl GD) { |
| 3416 | SavedAdjustmentsTy::iterator I = SavedAdjustments.find(GD); |
| 3417 | if (I != SavedAdjustments.end()) |
| 3418 | return &I->second; |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3419 | |
| 3420 | const CXXRecordDecl *RD = cast<CXXRecordDecl>(GD.getDecl()->getDeclContext()); |
Eli Friedman | 31bc3ad | 2009-12-07 23:56:34 +0000 | [diff] [blame] | 3421 | if (!SavedAdjustmentRecords.insert(RD).second) |
| 3422 | return 0; |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3423 | |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 3424 | AddressPointsMapTy AddressPoints; |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 3425 | OldVtableBuilder b(RD, RD, 0, CGM, false, AddressPoints); |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3426 | D1(printf("vtable %s\n", RD->getNameAsCString())); |
| 3427 | b.GenerateVtableForBase(RD); |
| 3428 | b.GenerateVtableForVBases(RD); |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3429 | |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 3430 | for (OldVtableBuilder::SavedAdjustmentsVectorTy::iterator |
Eli Friedman | 31bc3ad | 2009-12-07 23:56:34 +0000 | [diff] [blame] | 3431 | i = b.getSavedAdjustments().begin(), |
| 3432 | e = b.getSavedAdjustments().end(); i != e; i++) |
| 3433 | SavedAdjustments[i->first].push_back(i->second); |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3434 | |
Eli Friedman | 31bc3ad | 2009-12-07 23:56:34 +0000 | [diff] [blame] | 3435 | I = SavedAdjustments.find(GD); |
| 3436 | if (I != SavedAdjustments.end()) |
| 3437 | return &I->second; |
| 3438 | |
| 3439 | return 0; |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3440 | } |
| 3441 | |
Anders Carlsson | 4cbe83c | 2010-03-11 07:15:17 +0000 | [diff] [blame] | 3442 | int64_t CGVtableInfo::getVirtualBaseOffsetOffset(const CXXRecordDecl *RD, |
| 3443 | const CXXRecordDecl *VBase) { |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3444 | ClassPairTy ClassPair(RD, VBase); |
| 3445 | |
Anders Carlsson | 4cbe83c | 2010-03-11 07:15:17 +0000 | [diff] [blame] | 3446 | VirtualBaseClassOffsetOffsetsMapTy::iterator I = |
| 3447 | VirtualBaseClassOffsetOffsets.find(ClassPair); |
| 3448 | if (I != VirtualBaseClassOffsetOffsets.end()) |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3449 | return I->second; |
| 3450 | |
Anders Carlsson | dd819c9 | 2010-03-11 16:06:20 +0000 | [diff] [blame] | 3451 | VCallAndVBaseOffsetBuilder Builder(RD, RD, /*FinalOverriders=*/0, |
| 3452 | BaseSubobject(RD, 0), |
| 3453 | /*BaseIsVirtual=*/false, |
| 3454 | /*OffsetInLayoutClass=*/0); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3455 | |
Anders Carlsson | dd819c9 | 2010-03-11 16:06:20 +0000 | [diff] [blame] | 3456 | |
| 3457 | for (VCallAndVBaseOffsetBuilder::VBaseOffsetOffsetsMapTy::const_iterator I = |
| 3458 | Builder.getVBaseOffsetOffsets().begin(), |
| 3459 | E = Builder.getVBaseOffsetOffsets().end(); I != E; ++I) { |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3460 | // Insert all types. |
| 3461 | ClassPairTy ClassPair(RD, I->first); |
| 3462 | |
Anders Carlsson | 4cbe83c | 2010-03-11 07:15:17 +0000 | [diff] [blame] | 3463 | VirtualBaseClassOffsetOffsets.insert(std::make_pair(ClassPair, I->second)); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3464 | } |
| 3465 | |
Anders Carlsson | 4cbe83c | 2010-03-11 07:15:17 +0000 | [diff] [blame] | 3466 | I = VirtualBaseClassOffsetOffsets.find(ClassPair); |
Anders Carlsson | dd819c9 | 2010-03-11 16:06:20 +0000 | [diff] [blame] | 3467 | |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 3468 | // FIXME: The assertion below assertion currently fails with the old vtable |
| 3469 | /// layout code if there is a non-virtual thunk adjustment in a vtable. |
| 3470 | // Once the new layout is in place, this return should be removed. |
Anders Carlsson | 4cbe83c | 2010-03-11 07:15:17 +0000 | [diff] [blame] | 3471 | if (I == VirtualBaseClassOffsetOffsets.end()) |
Anders Carlsson | 6a6cbfc | 2010-02-13 20:11:51 +0000 | [diff] [blame] | 3472 | return 0; |
| 3473 | |
Anders Carlsson | 4cbe83c | 2010-03-11 07:15:17 +0000 | [diff] [blame] | 3474 | assert(I != VirtualBaseClassOffsetOffsets.end() && "Did not find index!"); |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3475 | |
| 3476 | return I->second; |
| 3477 | } |
| 3478 | |
Anders Carlsson | c8e39ec | 2009-12-05 21:03:56 +0000 | [diff] [blame] | 3479 | uint64_t CGVtableInfo::getVtableAddressPoint(const CXXRecordDecl *RD) { |
| 3480 | uint64_t AddressPoint = |
Anders Carlsson | 93a1884 | 2010-01-02 18:02:32 +0000 | [diff] [blame] | 3481 | (*(*(CGM.getVtableInfo().AddressPoints[RD]))[RD])[std::make_pair(RD, 0)]; |
Anders Carlsson | c8e39ec | 2009-12-05 21:03:56 +0000 | [diff] [blame] | 3482 | |
| 3483 | return AddressPoint; |
| 3484 | } |
| 3485 | |
Anders Carlsson | 7e28c5f | 2009-12-06 00:01:05 +0000 | [diff] [blame] | 3486 | llvm::GlobalVariable * |
Anders Carlsson | 0911ae8 | 2009-12-06 00:23:49 +0000 | [diff] [blame] | 3487 | CGVtableInfo::GenerateVtable(llvm::GlobalVariable::LinkageTypes Linkage, |
Anders Carlsson | 232324c | 2009-12-06 00:53:22 +0000 | [diff] [blame] | 3488 | bool GenerateDefinition, |
Anders Carlsson | 0911ae8 | 2009-12-06 00:23:49 +0000 | [diff] [blame] | 3489 | const CXXRecordDecl *LayoutClass, |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 3490 | const CXXRecordDecl *RD, uint64_t Offset, |
Anders Carlsson | 62c6c72 | 2010-02-28 00:36:23 +0000 | [diff] [blame] | 3491 | bool IsVirtual, |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 3492 | AddressPointsMapTy& AddressPoints) { |
Anders Carlsson | 9391375 | 2010-02-27 20:39:05 +0000 | [diff] [blame] | 3493 | if (GenerateDefinition) { |
| 3494 | if (LayoutClass == RD) { |
Anders Carlsson | 62c6c72 | 2010-02-28 00:36:23 +0000 | [diff] [blame] | 3495 | assert(!IsVirtual && |
Anders Carlsson | d5531e2 | 2010-03-11 05:48:21 +0000 | [diff] [blame] | 3496 | "Can only have a virtual base in construction vtables!"); |
| 3497 | assert(!Offset && |
| 3498 | "Can only have a base offset in construction vtables!"); |
Anders Carlsson | 9391375 | 2010-02-27 20:39:05 +0000 | [diff] [blame] | 3499 | } |
Anders Carlsson | d5531e2 | 2010-03-11 05:48:21 +0000 | [diff] [blame] | 3500 | |
| 3501 | VtableBuilder Builder(*this, RD, Offset, |
Anders Carlsson | 9f28dbc | 2010-03-11 06:10:52 +0000 | [diff] [blame] | 3502 | /*MostDerivedClassIsVirtual=*/IsVirtual, |
Anders Carlsson | d5531e2 | 2010-03-11 05:48:21 +0000 | [diff] [blame] | 3503 | LayoutClass); |
| 3504 | |
| 3505 | if (CGM.getLangOptions().DumpVtableLayouts) |
| 3506 | Builder.dumpLayout(llvm::errs()); |
Anders Carlsson | eee53d9 | 2010-02-13 02:02:03 +0000 | [diff] [blame] | 3507 | } |
| 3508 | |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3509 | llvm::SmallString<256> OutName; |
Mike Stump | 2cefe38 | 2009-11-12 20:47:57 +0000 | [diff] [blame] | 3510 | if (LayoutClass != RD) |
Anders Carlsson | 7e28c5f | 2009-12-06 00:01:05 +0000 | [diff] [blame] | 3511 | CGM.getMangleContext().mangleCXXCtorVtable(LayoutClass, Offset / 8, |
| 3512 | RD, OutName); |
Mike Stump | eac4559 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 3513 | else |
Anders Carlsson | 7e28c5f | 2009-12-06 00:01:05 +0000 | [diff] [blame] | 3514 | CGM.getMangleContext().mangleCXXVtable(RD, OutName); |
Daniel Dunbar | e128dd1 | 2009-11-21 09:06:22 +0000 | [diff] [blame] | 3515 | llvm::StringRef Name = OutName.str(); |
Benjamin Kramer | bb0a07b | 2009-10-11 22:57:54 +0000 | [diff] [blame] | 3516 | |
Anders Carlsson | 7e28c5f | 2009-12-06 00:01:05 +0000 | [diff] [blame] | 3517 | llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name); |
Anders Carlsson | 93a1884 | 2010-01-02 18:02:32 +0000 | [diff] [blame] | 3518 | if (GV == 0 || CGM.getVtableInfo().AddressPoints[LayoutClass] == 0 || |
| 3519 | GV->isDeclaration()) { |
Anders Carlsson | 5d40c6f | 2010-02-11 08:02:13 +0000 | [diff] [blame] | 3520 | OldVtableBuilder b(RD, LayoutClass, Offset, CGM, GenerateDefinition, |
| 3521 | AddressPoints); |
Eli Friedman | 6c08ce7 | 2009-12-05 01:05:03 +0000 | [diff] [blame] | 3522 | |
| 3523 | D1(printf("vtable %s\n", RD->getNameAsCString())); |
| 3524 | // First comes the vtables for all the non-virtual bases... |
Mike Stump | d538a6d | 2009-12-24 07:29:41 +0000 | [diff] [blame] | 3525 | b.GenerateVtableForBase(RD, Offset); |
Eli Friedman | 6c08ce7 | 2009-12-05 01:05:03 +0000 | [diff] [blame] | 3526 | |
| 3527 | // then the vtables for all the virtual bases. |
| 3528 | b.GenerateVtableForVBases(RD, Offset); |
| 3529 | |
Anders Carlsson | 58b271d | 2009-12-05 22:19:10 +0000 | [diff] [blame] | 3530 | llvm::Constant *Init = 0; |
Anders Carlsson | 7e28c5f | 2009-12-06 00:01:05 +0000 | [diff] [blame] | 3531 | const llvm::Type *Int8PtrTy = llvm::Type::getInt8PtrTy(CGM.getLLVMContext()); |
Anders Carlsson | 58b271d | 2009-12-05 22:19:10 +0000 | [diff] [blame] | 3532 | llvm::ArrayType *ArrayType = |
Anders Carlsson | fe5f7d9 | 2009-12-06 01:09:21 +0000 | [diff] [blame] | 3533 | llvm::ArrayType::get(Int8PtrTy, b.getVtableComponents().size()); |
Anders Carlsson | a95d4c5 | 2009-12-05 21:09:05 +0000 | [diff] [blame] | 3534 | |
Anders Carlsson | 232324c | 2009-12-06 00:53:22 +0000 | [diff] [blame] | 3535 | if (GenerateDefinition) |
Anders Carlsson | fe5f7d9 | 2009-12-06 01:09:21 +0000 | [diff] [blame] | 3536 | Init = llvm::ConstantArray::get(ArrayType, &b.getVtableComponents()[0], |
| 3537 | b.getVtableComponents().size()); |
Anders Carlsson | 232324c | 2009-12-06 00:53:22 +0000 | [diff] [blame] | 3538 | |
Mike Stump | aa51ad6 | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 3539 | llvm::GlobalVariable *OGV = GV; |
Anders Carlsson | 232324c | 2009-12-06 00:53:22 +0000 | [diff] [blame] | 3540 | |
| 3541 | GV = new llvm::GlobalVariable(CGM.getModule(), ArrayType, |
| 3542 | /*isConstant=*/true, Linkage, Init, Name); |
Anders Carlsson | fe5f7d9 | 2009-12-06 01:09:21 +0000 | [diff] [blame] | 3543 | CGM.setGlobalVisibility(GV, RD); |
| 3544 | |
Mike Stump | aa51ad6 | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 3545 | if (OGV) { |
| 3546 | GV->takeName(OGV); |
Anders Carlsson | 58b271d | 2009-12-05 22:19:10 +0000 | [diff] [blame] | 3547 | llvm::Constant *NewPtr = |
| 3548 | llvm::ConstantExpr::getBitCast(GV, OGV->getType()); |
Mike Stump | aa51ad6 | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 3549 | OGV->replaceAllUsesWith(NewPtr); |
| 3550 | OGV->eraseFromParent(); |
| 3551 | } |
Mike Stump | aa51ad6 | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 3552 | } |
Anders Carlsson | b3f54b7 | 2009-12-05 21:28:12 +0000 | [diff] [blame] | 3553 | |
| 3554 | return GV; |
Anders Carlsson | 2bb27f5 | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 3555 | } |
Mike Stump | 9f23a14 | 2009-11-10 02:30:51 +0000 | [diff] [blame] | 3556 | |
Anders Carlsson | 232324c | 2009-12-06 00:53:22 +0000 | [diff] [blame] | 3557 | void CGVtableInfo::GenerateClassData(llvm::GlobalVariable::LinkageTypes Linkage, |
| 3558 | const CXXRecordDecl *RD) { |
Anders Carlsson | e1b3e62 | 2009-12-07 07:59:52 +0000 | [diff] [blame] | 3559 | llvm::GlobalVariable *&Vtable = Vtables[RD]; |
| 3560 | if (Vtable) { |
| 3561 | assert(Vtable->getInitializer() && "Vtable doesn't have a definition!"); |
| 3562 | return; |
| 3563 | } |
| 3564 | |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 3565 | AddressPointsMapTy AddressPoints; |
| 3566 | Vtable = GenerateVtable(Linkage, /*GenerateDefinition=*/true, RD, RD, 0, |
Anders Carlsson | 62c6c72 | 2010-02-28 00:36:23 +0000 | [diff] [blame] | 3567 | /*IsVirtual=*/false, |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 3568 | AddressPoints); |
Rafael Espindola | e7113ca | 2010-03-10 02:19:29 +0000 | [diff] [blame] | 3569 | GenerateVTT(Linkage, /*GenerateDefinition=*/true, RD); |
| 3570 | |
| 3571 | for (CXXRecordDecl::method_iterator i = RD->method_begin(), |
| 3572 | e = RD->method_end(); i != e; ++i) { |
| 3573 | if (!(*i)->isVirtual()) |
| 3574 | continue; |
| 3575 | if(!(*i)->hasInlineBody() && !(*i)->isImplicit()) |
| 3576 | continue; |
| 3577 | |
| 3578 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(*i)) { |
| 3579 | CGM.BuildThunksForVirtual(GlobalDecl(DD, Dtor_Complete)); |
| 3580 | CGM.BuildThunksForVirtual(GlobalDecl(DD, Dtor_Deleting)); |
| 3581 | } else { |
| 3582 | CGM.BuildThunksForVirtual(GlobalDecl(*i)); |
| 3583 | } |
| 3584 | } |
Mike Stump | 1a139f8 | 2009-11-19 01:08:19 +0000 | [diff] [blame] | 3585 | } |
| 3586 | |
Anders Carlsson | 7e28c5f | 2009-12-06 00:01:05 +0000 | [diff] [blame] | 3587 | llvm::GlobalVariable *CGVtableInfo::getVtable(const CXXRecordDecl *RD) { |
Anders Carlsson | 232324c | 2009-12-06 00:53:22 +0000 | [diff] [blame] | 3588 | llvm::GlobalVariable *Vtable = Vtables.lookup(RD); |
Anders Carlsson | 7e28c5f | 2009-12-06 00:01:05 +0000 | [diff] [blame] | 3589 | |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 3590 | if (!Vtable) { |
| 3591 | AddressPointsMapTy AddressPoints; |
Anders Carlsson | 232324c | 2009-12-06 00:53:22 +0000 | [diff] [blame] | 3592 | Vtable = GenerateVtable(llvm::GlobalValue::ExternalLinkage, |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 3593 | /*GenerateDefinition=*/false, RD, RD, 0, |
Anders Carlsson | 62c6c72 | 2010-02-28 00:36:23 +0000 | [diff] [blame] | 3594 | /*IsVirtual=*/false, AddressPoints); |
Anders Carlsson | 5f9a881 | 2010-01-14 02:29:07 +0000 | [diff] [blame] | 3595 | } |
Mike Stump | aa51ad6 | 2009-11-19 04:04:36 +0000 | [diff] [blame] | 3596 | |
Anders Carlsson | 4ed44eb | 2009-12-05 22:42:54 +0000 | [diff] [blame] | 3597 | return Vtable; |
Mike Stump | d846d08 | 2009-11-10 07:44:33 +0000 | [diff] [blame] | 3598 | } |
Mike Stump | eac4559 | 2009-11-11 20:26:26 +0000 | [diff] [blame] | 3599 | |
Anders Carlsson | b1d3f7c | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 3600 | void CGVtableInfo::MaybeEmitVtable(GlobalDecl GD) { |
| 3601 | const CXXMethodDecl *MD = cast<CXXMethodDecl>(GD.getDecl()); |
| 3602 | const CXXRecordDecl *RD = MD->getParent(); |
| 3603 | |
Anders Carlsson | 4ed44eb | 2009-12-05 22:42:54 +0000 | [diff] [blame] | 3604 | // If the class doesn't have a vtable we don't need to emit one. |
| 3605 | if (!RD->isDynamicClass()) |
| 3606 | return; |
| 3607 | |
Anders Carlsson | b1d3f7c | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 3608 | // Get the key function. |
Anders Carlsson | 5ebf8b4 | 2009-12-07 04:35:11 +0000 | [diff] [blame] | 3609 | const CXXMethodDecl *KeyFunction = CGM.getContext().getKeyFunction(RD); |
Anders Carlsson | b1d3f7c | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 3610 | |
Anders Carlsson | 4ed44eb | 2009-12-05 22:42:54 +0000 | [diff] [blame] | 3611 | if (KeyFunction) { |
| 3612 | // We don't have the right key function. |
| 3613 | if (KeyFunction->getCanonicalDecl() != MD->getCanonicalDecl()) |
| 3614 | return; |
Anders Carlsson | b1d3f7c | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 3615 | } |
| 3616 | |
Rafael Espindola | e7113ca | 2010-03-10 02:19:29 +0000 | [diff] [blame] | 3617 | if (Vtables.count(RD)) |
| 3618 | return; |
Eli Friedman | 8174f2c | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 3619 | |
Rafael Espindola | e7113ca | 2010-03-10 02:19:29 +0000 | [diff] [blame] | 3620 | TemplateSpecializationKind kind = RD->getTemplateSpecializationKind(); |
| 3621 | if (kind == TSK_ImplicitInstantiation) |
| 3622 | CGM.DeferredVtables.push_back(RD); |
| 3623 | else |
| 3624 | GenerateClassData(CGM.getVtableLinkage(RD), RD); |
Anders Carlsson | b1d3f7c | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 3625 | } |