Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- CodeGenModule.cpp - Emit LLVM Code from ASTs for a Module --------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 0bc735f | 2007-12-29 19:59:25 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This coordinates the per-module state used while generating code. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "CodeGenModule.h" |
Chris Lattner | bd36064 | 2009-03-26 05:00:52 +0000 | [diff] [blame] | 15 | #include "CGDebugInfo.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 16 | #include "CodeGenFunction.h" |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 17 | #include "CGCall.h" |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 18 | #include "CGObjCRuntime.h" |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 19 | #include "Mangle.h" |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 20 | #include "TargetInfo.h" |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 21 | #include "clang/CodeGen/CodeGenOptions.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 22 | #include "clang/AST/ASTContext.h" |
Ken Dyck | 687cc4a | 2010-01-26 13:48:07 +0000 | [diff] [blame] | 23 | #include "clang/AST/CharUnits.h" |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 24 | #include "clang/AST/DeclObjC.h" |
Chris Lattner | 21ef7ae | 2008-11-04 16:51:42 +0000 | [diff] [blame] | 25 | #include "clang/AST/DeclCXX.h" |
Anders Carlsson | 1a5e0d7 | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 26 | #include "clang/AST/RecordLayout.h" |
Chris Lattner | 1b63e4f | 2009-06-14 01:54:56 +0000 | [diff] [blame] | 27 | #include "clang/Basic/Builtins.h" |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 28 | #include "clang/Basic/Diagnostic.h" |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 29 | #include "clang/Basic/SourceManager.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 30 | #include "clang/Basic/TargetInfo.h" |
Steve Naroff | e9b7d8a | 2009-04-01 15:50:34 +0000 | [diff] [blame] | 31 | #include "clang/Basic/ConvertUTF.h" |
Nate Begeman | ec9426c | 2008-03-09 03:09:36 +0000 | [diff] [blame] | 32 | #include "llvm/CallingConv.h" |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 33 | #include "llvm/Module.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 34 | #include "llvm/Intrinsics.h" |
Chris Lattner | d5b8902 | 2009-12-28 21:44:41 +0000 | [diff] [blame] | 35 | #include "llvm/LLVMContext.h" |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 36 | #include "llvm/Target/TargetData.h" |
Chris Lattner | 78f7ece | 2009-11-07 09:22:46 +0000 | [diff] [blame] | 37 | #include "llvm/Support/ErrorHandling.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 38 | using namespace clang; |
| 39 | using namespace CodeGen; |
| 40 | |
| 41 | |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 42 | CodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, |
Chris Lattner | fb97b03 | 2007-12-02 01:40:18 +0000 | [diff] [blame] | 43 | llvm::Module &M, const llvm::TargetData &TD, |
Chris Lattner | bd36064 | 2009-03-26 05:00:52 +0000 | [diff] [blame] | 44 | Diagnostic &diags) |
| 45 | : BlockModule(C, M, TD, Types, *this), Context(C), |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 46 | Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 47 | TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags), |
| 48 | Types(C, M, TD, getTargetCodeGenInfo().getABIInfo()), |
| 49 | MangleCtx(C), VtableInfo(*this), Runtime(0), |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 50 | MemCpyFn(0), MemMoveFn(0), MemSetFn(0), CFConstantStringClassRef(0), |
| 51 | VMContext(M.getContext()) { |
Daniel Dunbar | 208ff5e | 2008-08-11 18:12:00 +0000 | [diff] [blame] | 52 | |
Chris Lattner | 3c8f153 | 2009-03-21 07:12:05 +0000 | [diff] [blame] | 53 | if (!Features.ObjC1) |
| 54 | Runtime = 0; |
| 55 | else if (!Features.NeXTRuntime) |
| 56 | Runtime = CreateGNUObjCRuntime(*this); |
| 57 | else if (Features.ObjCNonFragileABI) |
| 58 | Runtime = CreateMacNonFragileABIObjCRuntime(*this); |
| 59 | else |
| 60 | Runtime = CreateMacObjCRuntime(*this); |
Sanjiv Gupta | e8b9f5b | 2008-05-08 08:54:20 +0000 | [diff] [blame] | 61 | |
| 62 | // If debug info generation is enabled, create the CGDebugInfo object. |
Anders Carlsson | 20f12a2 | 2009-12-06 18:00:51 +0000 | [diff] [blame] | 63 | DebugInfo = CodeGenOpts.DebugInfo ? new CGDebugInfo(*this) : 0; |
Chris Lattner | 2b94fe3 | 2008-03-01 08:45:05 +0000 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | CodeGenModule::~CodeGenModule() { |
Ted Kremenek | 815c78f | 2008-08-05 18:50:11 +0000 | [diff] [blame] | 67 | delete Runtime; |
| 68 | delete DebugInfo; |
| 69 | } |
| 70 | |
David Chisnall | 0d13f6f | 2010-01-23 02:40:42 +0000 | [diff] [blame] | 71 | void CodeGenModule::createObjCRuntime() { |
| 72 | if (!Features.NeXTRuntime) |
| 73 | Runtime = CreateGNUObjCRuntime(*this); |
| 74 | else if (Features.ObjCNonFragileABI) |
| 75 | Runtime = CreateMacNonFragileABIObjCRuntime(*this); |
| 76 | else |
| 77 | Runtime = CreateMacObjCRuntime(*this); |
| 78 | } |
| 79 | |
Ted Kremenek | 815c78f | 2008-08-05 18:50:11 +0000 | [diff] [blame] | 80 | void CodeGenModule::Release() { |
Chris Lattner | 82227ff | 2009-03-22 21:21:57 +0000 | [diff] [blame] | 81 | EmitDeferred(); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 82 | EmitCXXGlobalInitFunc(); |
Daniel Dunbar | 208ff5e | 2008-08-11 18:12:00 +0000 | [diff] [blame] | 83 | if (Runtime) |
| 84 | if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) |
| 85 | AddGlobalCtor(ObjCInitFunction); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 86 | EmitCtorList(GlobalCtors, "llvm.global_ctors"); |
| 87 | EmitCtorList(GlobalDtors, "llvm.global_dtors"); |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 88 | EmitAnnotations(); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 89 | EmitLLVMUsed(); |
Daniel Dunbar | f1968f2 | 2008-10-01 00:49:24 +0000 | [diff] [blame] | 90 | } |
| 91 | |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 92 | /// ErrorUnsupported - Print out an error that codegen doesn't support the |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 93 | /// specified stmt yet. |
Daniel Dunbar | 90df4b6 | 2008-09-04 03:43:08 +0000 | [diff] [blame] | 94 | void CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, |
| 95 | bool OmitOnError) { |
| 96 | if (OmitOnError && getDiags().hasErrorOccurred()) |
| 97 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 98 | unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, |
Daniel Dunbar | 56b8001 | 2009-02-06 19:18:03 +0000 | [diff] [blame] | 99 | "cannot compile this %0 yet"); |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 100 | std::string Msg = Type; |
Chris Lattner | 0a14eee | 2008-11-18 07:04:44 +0000 | [diff] [blame] | 101 | getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) |
| 102 | << Msg << S->getSourceRange(); |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 103 | } |
Chris Lattner | 58c3f9e | 2007-12-02 06:27:33 +0000 | [diff] [blame] | 104 | |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 105 | /// ErrorUnsupported - Print out an error that codegen doesn't support the |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 106 | /// specified decl yet. |
Daniel Dunbar | 90df4b6 | 2008-09-04 03:43:08 +0000 | [diff] [blame] | 107 | void CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, |
| 108 | bool OmitOnError) { |
| 109 | if (OmitOnError && getDiags().hasErrorOccurred()) |
| 110 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 111 | unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, |
Daniel Dunbar | 56b8001 | 2009-02-06 19:18:03 +0000 | [diff] [blame] | 112 | "cannot compile this %0 yet"); |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 113 | std::string Msg = Type; |
Chris Lattner | 0a14eee | 2008-11-18 07:04:44 +0000 | [diff] [blame] | 114 | getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 115 | } |
| 116 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 117 | LangOptions::VisibilityMode |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 118 | CodeGenModule::getDeclVisibilityMode(const Decl *D) const { |
| 119 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) |
| 120 | if (VD->getStorageClass() == VarDecl::PrivateExtern) |
| 121 | return LangOptions::Hidden; |
| 122 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 123 | if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) { |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 124 | switch (attr->getVisibility()) { |
| 125 | default: assert(0 && "Unknown visibility!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 126 | case VisibilityAttr::DefaultVisibility: |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 127 | return LangOptions::Default; |
| 128 | case VisibilityAttr::HiddenVisibility: |
| 129 | return LangOptions::Hidden; |
| 130 | case VisibilityAttr::ProtectedVisibility: |
| 131 | return LangOptions::Protected; |
| 132 | } |
| 133 | } |
| 134 | |
Anders Carlsson | 39de84d | 2010-02-07 01:44:36 +0000 | [diff] [blame] | 135 | // This decl should have the same visibility as its parent. |
| 136 | if (const DeclContext *DC = D->getDeclContext()) |
| 137 | return getDeclVisibilityMode(cast<Decl>(DC)); |
| 138 | |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 139 | return getLangOptions().getVisibilityMode(); |
| 140 | } |
| 141 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 142 | void CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 143 | const Decl *D) const { |
| 144 | // Internal definitions always have default visibility. |
Chris Lattner | df102fc | 2009-04-14 05:27:13 +0000 | [diff] [blame] | 145 | if (GV->hasLocalLinkage()) { |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 146 | GV->setVisibility(llvm::GlobalValue::DefaultVisibility); |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 147 | return; |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 148 | } |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 149 | |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 150 | switch (getDeclVisibilityMode(D)) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 151 | default: assert(0 && "Unknown visibility!"); |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 152 | case LangOptions::Default: |
| 153 | return GV->setVisibility(llvm::GlobalValue::DefaultVisibility); |
| 154 | case LangOptions::Hidden: |
| 155 | return GV->setVisibility(llvm::GlobalValue::HiddenVisibility); |
| 156 | case LangOptions::Protected: |
| 157 | return GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 158 | } |
| 159 | } |
| 160 | |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 161 | const char *CodeGenModule::getMangledName(const GlobalDecl &GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 162 | const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 163 | |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 164 | if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) |
| 165 | return getMangledCXXCtorName(D, GD.getCtorType()); |
| 166 | if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) |
| 167 | return getMangledCXXDtorName(D, GD.getDtorType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 168 | |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 169 | return getMangledName(ND); |
| 170 | } |
| 171 | |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 172 | /// \brief Retrieves the mangled name for the given declaration. |
| 173 | /// |
| 174 | /// If the given declaration requires a mangled name, returns an |
Chris Lattner | c50689b | 2009-03-21 06:31:09 +0000 | [diff] [blame] | 175 | /// const char* containing the mangled name. Otherwise, returns |
| 176 | /// the unmangled name. |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 177 | /// |
Douglas Gregor | 6ec3668 | 2009-02-18 23:53:56 +0000 | [diff] [blame] | 178 | const char *CodeGenModule::getMangledName(const NamedDecl *ND) { |
Daniel Dunbar | f981bf8 | 2009-11-21 09:14:52 +0000 | [diff] [blame] | 179 | if (!getMangleContext().shouldMangleDeclName(ND)) { |
Chris Lattner | c50689b | 2009-03-21 06:31:09 +0000 | [diff] [blame] | 180 | assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); |
Chris Lattner | 3c8f153 | 2009-03-21 07:12:05 +0000 | [diff] [blame] | 181 | return ND->getNameAsCString(); |
Chris Lattner | c50689b | 2009-03-21 06:31:09 +0000 | [diff] [blame] | 182 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 183 | |
Douglas Gregor | 6ec3668 | 2009-02-18 23:53:56 +0000 | [diff] [blame] | 184 | llvm::SmallString<256> Name; |
Daniel Dunbar | f981bf8 | 2009-11-21 09:14:52 +0000 | [diff] [blame] | 185 | getMangleContext().mangleName(ND, Name); |
Douglas Gregor | 6ec3668 | 2009-02-18 23:53:56 +0000 | [diff] [blame] | 186 | Name += '\0'; |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 187 | return UniqueMangledName(Name.begin(), Name.end()); |
| 188 | } |
| 189 | |
| 190 | const char *CodeGenModule::UniqueMangledName(const char *NameStart, |
| 191 | const char *NameEnd) { |
| 192 | assert(*(NameEnd - 1) == '\0' && "Mangled name must be null terminated!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 193 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 194 | return MangledNames.GetOrCreateValue(NameStart, NameEnd).getKeyData(); |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 195 | } |
| 196 | |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 197 | /// AddGlobalCtor - Add a function to the list that will be called before |
| 198 | /// main() runs. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 199 | void CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 200 | // FIXME: Type coercion of void()* types. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 201 | GlobalCtors.push_back(std::make_pair(Ctor, Priority)); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 202 | } |
| 203 | |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 204 | /// AddGlobalDtor - Add a function to the list that will be called |
| 205 | /// when the module is unloaded. |
| 206 | void CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 207 | // FIXME: Type coercion of void()* types. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 208 | GlobalDtors.push_back(std::make_pair(Dtor, Priority)); |
| 209 | } |
| 210 | |
| 211 | void CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { |
| 212 | // Ctor function type is void()*. |
| 213 | llvm::FunctionType* CtorFTy = |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 214 | llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 215 | std::vector<const llvm::Type*>(), |
| 216 | false); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 217 | llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 218 | |
| 219 | // Get the type of a ctor entry, { i32, void ()* }. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 220 | llvm::StructType* CtorStructTy = |
| 221 | llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 222 | llvm::PointerType::getUnqual(CtorFTy), NULL); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 223 | |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 224 | // Construct the constructor and destructor arrays. |
| 225 | std::vector<llvm::Constant*> Ctors; |
| 226 | for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { |
| 227 | std::vector<llvm::Constant*> S; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 228 | S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 229 | I->second, false)); |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 230 | S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); |
Owen Anderson | 08e2524 | 2009-07-27 22:29:56 +0000 | [diff] [blame] | 231 | Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 232 | } |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 233 | |
| 234 | if (!Ctors.empty()) { |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 235 | llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 236 | new llvm::GlobalVariable(TheModule, AT, false, |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 237 | llvm::GlobalValue::AppendingLinkage, |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 238 | llvm::ConstantArray::get(AT, Ctors), |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 239 | GlobalName); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 240 | } |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 241 | } |
| 242 | |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 243 | void CodeGenModule::EmitAnnotations() { |
| 244 | if (Annotations.empty()) |
| 245 | return; |
| 246 | |
| 247 | // Create a new global variable for the ConstantStruct in the Module. |
| 248 | llvm::Constant *Array = |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 249 | llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 250 | Annotations.size()), |
| 251 | Annotations); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 252 | llvm::GlobalValue *gv = |
| 253 | new llvm::GlobalVariable(TheModule, Array->getType(), false, |
| 254 | llvm::GlobalValue::AppendingLinkage, Array, |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 255 | "llvm.global.annotations"); |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 256 | gv->setSection("llvm.metadata"); |
| 257 | } |
| 258 | |
Chris Lattner | 86daeee | 2009-04-14 16:44:36 +0000 | [diff] [blame] | 259 | static CodeGenModule::GVALinkage |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 260 | GetLinkageForFunction(ASTContext &Context, const FunctionDecl *FD, |
Douglas Gregor | 68584ed | 2009-06-18 16:11:24 +0000 | [diff] [blame] | 261 | const LangOptions &Features) { |
Douglas Gregor | 1fd2dd1 | 2009-06-29 22:39:32 +0000 | [diff] [blame] | 262 | CodeGenModule::GVALinkage External = CodeGenModule::GVA_StrongExternal; |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 263 | |
| 264 | Linkage L = FD->getLinkage(); |
| 265 | if (L == ExternalLinkage && Context.getLangOptions().CPlusPlus && |
| 266 | FD->getType()->getLinkage() == UniqueExternalLinkage) |
| 267 | L = UniqueExternalLinkage; |
| 268 | |
| 269 | switch (L) { |
| 270 | case NoLinkage: |
| 271 | case InternalLinkage: |
| 272 | case UniqueExternalLinkage: |
| 273 | return CodeGenModule::GVA_Internal; |
Anders Carlsson | 548e60e | 2009-12-10 22:25:34 +0000 | [diff] [blame] | 274 | |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 275 | case ExternalLinkage: |
| 276 | switch (FD->getTemplateSpecializationKind()) { |
| 277 | case TSK_Undeclared: |
| 278 | case TSK_ExplicitSpecialization: |
| 279 | External = CodeGenModule::GVA_StrongExternal; |
| 280 | break; |
| 281 | |
| 282 | case TSK_ExplicitInstantiationDefinition: |
| 283 | // FIXME: explicit instantiation definitions should use weak linkage |
Anders Carlsson | 548e60e | 2009-12-10 22:25:34 +0000 | [diff] [blame] | 284 | return CodeGenModule::GVA_StrongExternal; |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 285 | |
| 286 | case TSK_ExplicitInstantiationDeclaration: |
| 287 | case TSK_ImplicitInstantiation: |
Anders Carlsson | 548e60e | 2009-12-10 22:25:34 +0000 | [diff] [blame] | 288 | External = CodeGenModule::GVA_TemplateInstantiation; |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 289 | break; |
| 290 | } |
Anders Carlsson | 548e60e | 2009-12-10 22:25:34 +0000 | [diff] [blame] | 291 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 292 | |
Douglas Gregor | 7ced9c8 | 2009-10-27 21:11:48 +0000 | [diff] [blame] | 293 | if (!FD->isInlined()) |
Douglas Gregor | 1fd2dd1 | 2009-06-29 22:39:32 +0000 | [diff] [blame] | 294 | return External; |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 295 | |
Douglas Gregor | 1fc09a9 | 2009-09-13 07:46:26 +0000 | [diff] [blame] | 296 | if (!Features.CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { |
| 297 | // GNU or C99 inline semantics. Determine whether this symbol should be |
| 298 | // externally visible. |
| 299 | if (FD->isInlineDefinitionExternallyVisible()) |
| 300 | return External; |
| 301 | |
| 302 | // C99 inline semantics, where the symbol is not externally visible. |
| 303 | return CodeGenModule::GVA_C99Inline; |
Chris Lattner | d55a71d | 2009-04-22 00:03:30 +0000 | [diff] [blame] | 304 | } |
Chris Lattner | cbb8fc1 | 2009-04-14 20:25:53 +0000 | [diff] [blame] | 305 | |
Douglas Gregor | 7d9c3c9 | 2009-10-27 23:26:40 +0000 | [diff] [blame] | 306 | // C++0x [temp.explicit]p9: |
| 307 | // [ Note: The intent is that an inline function that is the subject of |
| 308 | // an explicit instantiation declaration will still be implicitly |
| 309 | // instantiated when used so that the body can be considered for |
| 310 | // inlining, but that no out-of-line copy of the inline function would be |
| 311 | // generated in the translation unit. -- end note ] |
| 312 | if (FD->getTemplateSpecializationKind() |
| 313 | == TSK_ExplicitInstantiationDeclaration) |
| 314 | return CodeGenModule::GVA_C99Inline; |
| 315 | |
Douglas Gregor | 1fc09a9 | 2009-09-13 07:46:26 +0000 | [diff] [blame] | 316 | return CodeGenModule::GVA_CXXInline; |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 317 | } |
| 318 | |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 319 | llvm::GlobalValue::LinkageTypes |
| 320 | CodeGenModule::getFunctionLinkage(const FunctionDecl *D) { |
Douglas Gregor | 68584ed | 2009-06-18 16:11:24 +0000 | [diff] [blame] | 321 | GVALinkage Linkage = GetLinkageForFunction(getContext(), D, Features); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 322 | |
Daniel Dunbar | 55d6f50 | 2009-04-14 07:19:20 +0000 | [diff] [blame] | 323 | if (Linkage == GVA_Internal) { |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 324 | return llvm::Function::InternalLinkage; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 325 | } else if (D->hasAttr<DLLExportAttr>()) { |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 326 | return llvm::Function::DLLExportLinkage; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 327 | } else if (D->hasAttr<WeakAttr>()) { |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 328 | return llvm::Function::WeakAnyLinkage; |
Chris Lattner | cbb8fc1 | 2009-04-14 20:25:53 +0000 | [diff] [blame] | 329 | } else if (Linkage == GVA_C99Inline) { |
| 330 | // In C99 mode, 'inline' functions are guaranteed to have a strong |
| 331 | // definition somewhere else, so we can use available_externally linkage. |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 332 | return llvm::Function::AvailableExternallyLinkage; |
Douglas Gregor | 1fd2dd1 | 2009-06-29 22:39:32 +0000 | [diff] [blame] | 333 | } else if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) { |
Chris Lattner | 86daeee | 2009-04-14 16:44:36 +0000 | [diff] [blame] | 334 | // In C++, the compiler has to emit a definition in every translation unit |
| 335 | // that references the function. We should use linkonce_odr because |
| 336 | // a) if all references in this translation unit are optimized away, we |
| 337 | // don't need to codegen it. b) if the function persists, it needs to be |
| 338 | // merged with other definitions. c) C++ has the ODR, so we know the |
| 339 | // definition is dependable. |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 340 | return llvm::Function::LinkOnceODRLinkage; |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 341 | } else { |
Chris Lattner | cbb8fc1 | 2009-04-14 20:25:53 +0000 | [diff] [blame] | 342 | assert(Linkage == GVA_StrongExternal); |
| 343 | // Otherwise, we have strong external linkage. |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 344 | return llvm::Function::ExternalLinkage; |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 345 | } |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 346 | } |
Nuno Lopes | d4cbda6 | 2008-06-08 15:45:52 +0000 | [diff] [blame] | 347 | |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 348 | |
| 349 | /// SetFunctionDefinitionAttributes - Set attributes for a global. |
| 350 | /// |
| 351 | /// FIXME: This is currently only done for aliases and functions, but not for |
| 352 | /// variables (these details are set in EmitGlobalVarDefinition for variables). |
| 353 | void CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, |
| 354 | llvm::GlobalValue *GV) { |
| 355 | GV->setLinkage(getFunctionLinkage(D)); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 356 | SetCommonAttributes(D, GV); |
Nuno Lopes | d4cbda6 | 2008-06-08 15:45:52 +0000 | [diff] [blame] | 357 | } |
| 358 | |
Daniel Dunbar | 7dbd819 | 2009-04-14 07:08:30 +0000 | [diff] [blame] | 359 | void CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 360 | const CGFunctionInfo &Info, |
Daniel Dunbar | 7dbd819 | 2009-04-14 07:08:30 +0000 | [diff] [blame] | 361 | llvm::Function *F) { |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 362 | unsigned CallingConv; |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 363 | AttributeListType AttributeList; |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 364 | ConstructAttributeList(Info, D, AttributeList, CallingConv); |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 365 | F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 366 | AttributeList.size())); |
| 367 | F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 368 | } |
| 369 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 370 | void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, |
| 371 | llvm::Function *F) { |
Daniel Dunbar | 74ac74a | 2009-03-02 04:58:03 +0000 | [diff] [blame] | 372 | if (!Features.Exceptions && !Features.ObjCNonFragileABI) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 373 | F->addFnAttr(llvm::Attribute::NoUnwind); |
Daniel Dunbar | af668b0 | 2008-10-28 00:17:57 +0000 | [diff] [blame] | 374 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 375 | if (D->hasAttr<AlwaysInlineAttr>()) |
Daniel Dunbar | af668b0 | 2008-10-28 00:17:57 +0000 | [diff] [blame] | 376 | F->addFnAttr(llvm::Attribute::AlwaysInline); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 377 | |
Mike Stump | 1feade8 | 2009-08-26 22:31:08 +0000 | [diff] [blame] | 378 | if (D->hasAttr<NoInlineAttr>()) |
Anders Carlsson | 81ebbde | 2009-02-19 19:22:11 +0000 | [diff] [blame] | 379 | F->addFnAttr(llvm::Attribute::NoInline); |
Mike Stump | f55314d | 2009-10-05 21:58:44 +0000 | [diff] [blame] | 380 | |
Anders Carlsson | fd01535 | 2009-11-16 16:56:03 +0000 | [diff] [blame] | 381 | if (Features.getStackProtectorMode() == LangOptions::SSPOn) |
| 382 | F->addFnAttr(llvm::Attribute::StackProtect); |
| 383 | else if (Features.getStackProtectorMode() == LangOptions::SSPReq) |
| 384 | F->addFnAttr(llvm::Attribute::StackProtectReq); |
| 385 | |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 386 | if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) { |
| 387 | unsigned width = Context.Target.getCharWidth(); |
| 388 | F->setAlignment(AA->getAlignment() / width); |
| 389 | while ((AA = AA->getNext<AlignedAttr>())) |
| 390 | F->setAlignment(std::max(F->getAlignment(), AA->getAlignment() / width)); |
| 391 | } |
Mike Stump | fb51ddf | 2009-10-05 22:49:20 +0000 | [diff] [blame] | 392 | // C++ ABI requires 2-byte alignment for member functions. |
Mike Stump | bd6dbd1 | 2009-10-05 23:08:21 +0000 | [diff] [blame] | 393 | if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) |
| 394 | F->setAlignment(2); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 395 | } |
| 396 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 397 | void CodeGenModule::SetCommonAttributes(const Decl *D, |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 398 | llvm::GlobalValue *GV) { |
| 399 | setGlobalVisibility(GV, D); |
| 400 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 401 | if (D->hasAttr<UsedAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 402 | AddUsedGlobal(GV); |
| 403 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 404 | if (const SectionAttr *SA = D->getAttr<SectionAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 405 | GV->setSection(SA->getName()); |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 406 | |
| 407 | getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 408 | } |
| 409 | |
Daniel Dunbar | 0e4f40e | 2009-04-17 00:48:04 +0000 | [diff] [blame] | 410 | void CodeGenModule::SetInternalFunctionAttributes(const Decl *D, |
| 411 | llvm::Function *F, |
| 412 | const CGFunctionInfo &FI) { |
| 413 | SetLLVMFunctionAttributes(D, FI, F); |
| 414 | SetLLVMFunctionAttributesForDefinition(D, F); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 415 | |
| 416 | F->setLinkage(llvm::Function::InternalLinkage); |
| 417 | |
Daniel Dunbar | 0e4f40e | 2009-04-17 00:48:04 +0000 | [diff] [blame] | 418 | SetCommonAttributes(D, F); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 419 | } |
| 420 | |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 421 | void CodeGenModule::SetFunctionAttributes(GlobalDecl GD, |
Eli Friedman | c6c14d1 | 2009-05-26 01:22:57 +0000 | [diff] [blame] | 422 | llvm::Function *F, |
| 423 | bool IsIncompleteFunction) { |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 424 | const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); |
| 425 | |
Eli Friedman | c6c14d1 | 2009-05-26 01:22:57 +0000 | [diff] [blame] | 426 | if (!IsIncompleteFunction) |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 427 | SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 428 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 429 | // Only a few attributes are set on declarations; these may later be |
| 430 | // overridden by a definition. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 431 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 432 | if (FD->hasAttr<DLLImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 433 | F->setLinkage(llvm::Function::DLLImportLinkage); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 434 | } else if (FD->hasAttr<WeakAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 435 | FD->hasAttr<WeakImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 436 | // "extern_weak" is overloaded in LLVM; we probably should have |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 437 | // separate linkage types for this. |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 438 | F->setLinkage(llvm::Function::ExternalWeakLinkage); |
| 439 | } else { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 440 | F->setLinkage(llvm::Function::ExternalLinkage); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 441 | } |
| 442 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 443 | if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 444 | F->setSection(SA->getName()); |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 445 | } |
| 446 | |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 447 | void CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 448 | assert(!GV->isDeclaration() && |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 449 | "Only globals with definition can force usage."); |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 450 | LLVMUsed.push_back(GV); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 451 | } |
| 452 | |
| 453 | void CodeGenModule::EmitLLVMUsed() { |
| 454 | // Don't create llvm.used if there is no need. |
Chris Lattner | ad64e02 | 2009-07-17 23:57:13 +0000 | [diff] [blame] | 455 | if (LLVMUsed.empty()) |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 456 | return; |
| 457 | |
Benjamin Kramer | 3c0ef8c | 2009-10-13 10:07:13 +0000 | [diff] [blame] | 458 | const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 459 | |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 460 | // Convert LLVMUsed to what ConstantArray needs. |
| 461 | std::vector<llvm::Constant*> UsedArray; |
| 462 | UsedArray.resize(LLVMUsed.size()); |
| 463 | for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 464 | UsedArray[i] = |
| 465 | llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 466 | i8PTy); |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 467 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 468 | |
Fariborz Jahanian | c38e9af | 2009-06-23 21:47:46 +0000 | [diff] [blame] | 469 | if (UsedArray.empty()) |
| 470 | return; |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 471 | llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 472 | |
| 473 | llvm::GlobalVariable *GV = |
| 474 | new llvm::GlobalVariable(getModule(), ATy, false, |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 475 | llvm::GlobalValue::AppendingLinkage, |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 476 | llvm::ConstantArray::get(ATy, UsedArray), |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 477 | "llvm.used"); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 478 | |
| 479 | GV->setSection("llvm.metadata"); |
| 480 | } |
| 481 | |
| 482 | void CodeGenModule::EmitDeferred() { |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 483 | // Emit code for any potentially referenced deferred decls. Since a |
| 484 | // previously unused static decl may become used during the generation of code |
| 485 | // for a static function, iterate until no changes are made. |
| 486 | while (!DeferredDeclsToEmit.empty()) { |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 487 | GlobalDecl D = DeferredDeclsToEmit.back(); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 488 | DeferredDeclsToEmit.pop_back(); |
| 489 | |
| 490 | // The mangled name for the decl must have been emitted in GlobalDeclMap. |
| 491 | // Look it up to see if it was defined with a stronger definition (e.g. an |
| 492 | // extern inline function with a strong function redefinition). If so, |
| 493 | // just ignore the deferred decl. |
| 494 | llvm::GlobalValue *CGRef = GlobalDeclMap[getMangledName(D)]; |
| 495 | assert(CGRef && "Deferred decl wasn't referenced?"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 496 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 497 | if (!CGRef->isDeclaration()) |
| 498 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 499 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 500 | // Otherwise, emit the definition and move on to the next one. |
| 501 | EmitGlobalDefinition(D); |
| 502 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 503 | } |
| 504 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 505 | /// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 506 | /// annotation information for a given GlobalValue. The annotation struct is |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 507 | /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the |
| 508 | /// GlobalValue being annotated. The second field is the constant string |
| 509 | /// created from the AnnotateAttr's annotation. The third field is a constant |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 510 | /// string containing the name of the translation unit. The fourth field is |
| 511 | /// the line number in the file of the annotated value declaration. |
| 512 | /// |
| 513 | /// FIXME: this does not unique the annotation string constants, as llvm-gcc |
| 514 | /// appears to. |
| 515 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 516 | llvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 517 | const AnnotateAttr *AA, |
| 518 | unsigned LineNo) { |
| 519 | llvm::Module *M = &getModule(); |
| 520 | |
| 521 | // get [N x i8] constants for the annotation string, and the filename string |
| 522 | // which are the 2nd and 3rd elements of the global annotation structure. |
Benjamin Kramer | 3c0ef8c | 2009-10-13 10:07:13 +0000 | [diff] [blame] | 523 | const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 524 | llvm::Constant *anno = llvm::ConstantArray::get(VMContext, |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 525 | AA->getAnnotation(), true); |
| 526 | llvm::Constant *unit = llvm::ConstantArray::get(VMContext, |
| 527 | M->getModuleIdentifier(), |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 528 | true); |
| 529 | |
| 530 | // Get the two global values corresponding to the ConstantArrays we just |
| 531 | // created to hold the bytes of the strings. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 532 | llvm::GlobalValue *annoGV = |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 533 | new llvm::GlobalVariable(*M, anno->getType(), false, |
| 534 | llvm::GlobalValue::PrivateLinkage, anno, |
| 535 | GV->getName()); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 536 | // translation unit name string, emitted into the llvm.metadata section. |
| 537 | llvm::GlobalValue *unitGV = |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 538 | new llvm::GlobalVariable(*M, unit->getType(), false, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 539 | llvm::GlobalValue::PrivateLinkage, unit, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 540 | ".str"); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 541 | |
Daniel Dunbar | 57d5cee | 2009-04-14 22:41:13 +0000 | [diff] [blame] | 542 | // Create the ConstantStruct for the global annotation. |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 543 | llvm::Constant *Fields[4] = { |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 544 | llvm::ConstantExpr::getBitCast(GV, SBP), |
| 545 | llvm::ConstantExpr::getBitCast(annoGV, SBP), |
| 546 | llvm::ConstantExpr::getBitCast(unitGV, SBP), |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 547 | llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 548 | }; |
Owen Anderson | 47a434f | 2009-08-05 23:18:46 +0000 | [diff] [blame] | 549 | return llvm::ConstantStruct::get(VMContext, Fields, 4, false); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 550 | } |
| 551 | |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 552 | bool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { |
Daniel Dunbar | 5c61d97 | 2009-02-13 22:08:43 +0000 | [diff] [blame] | 553 | // Never defer when EmitAllDecls is specified or the decl has |
| 554 | // attribute used. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 555 | if (Features.EmitAllDecls || Global->hasAttr<UsedAttr>()) |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 556 | return false; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 557 | |
| 558 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 559 | // Constructors and destructors should never be deferred. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 560 | if (FD->hasAttr<ConstructorAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 561 | FD->hasAttr<DestructorAttr>()) |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 562 | return false; |
| 563 | |
Eli Friedman | 61eab88 | 2009-12-08 03:56:49 +0000 | [diff] [blame] | 564 | // The key function for a class must never be deferred. |
| 565 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Global)) { |
| 566 | const CXXRecordDecl *RD = MD->getParent(); |
| 567 | if (MD->isOutOfLine() && RD->isDynamicClass()) { |
| 568 | const CXXMethodDecl *KeyFunction = getContext().getKeyFunction(RD); |
Douglas Gregor | bd6d619 | 2010-01-05 19:06:31 +0000 | [diff] [blame] | 569 | if (KeyFunction && |
| 570 | KeyFunction->getCanonicalDecl() == MD->getCanonicalDecl()) |
Eli Friedman | 61eab88 | 2009-12-08 03:56:49 +0000 | [diff] [blame] | 571 | return false; |
| 572 | } |
| 573 | } |
| 574 | |
Douglas Gregor | 68584ed | 2009-06-18 16:11:24 +0000 | [diff] [blame] | 575 | GVALinkage Linkage = GetLinkageForFunction(getContext(), FD, Features); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 576 | |
Chris Lattner | dbb5a37 | 2009-04-14 06:44:48 +0000 | [diff] [blame] | 577 | // static, static inline, always_inline, and extern inline functions can |
Chris Lattner | 86daeee | 2009-04-14 16:44:36 +0000 | [diff] [blame] | 578 | // always be deferred. Normal inline functions can be deferred in C99/C++. |
Chris Lattner | cbb8fc1 | 2009-04-14 20:25:53 +0000 | [diff] [blame] | 579 | if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || |
Eli Friedman | ab18995 | 2009-12-25 05:29:40 +0000 | [diff] [blame] | 580 | Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) |
Chris Lattner | dbb5a37 | 2009-04-14 06:44:48 +0000 | [diff] [blame] | 581 | return true; |
Chris Lattner | dbb5a37 | 2009-04-14 06:44:48 +0000 | [diff] [blame] | 582 | return false; |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 583 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 584 | |
Chris Lattner | dbb5a37 | 2009-04-14 06:44:48 +0000 | [diff] [blame] | 585 | const VarDecl *VD = cast<VarDecl>(Global); |
| 586 | assert(VD->isFileVarDecl() && "Invalid decl"); |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 587 | |
Anders Carlsson | 74d644a | 2009-10-08 17:28:59 +0000 | [diff] [blame] | 588 | // We never want to defer structs that have non-trivial constructors or |
| 589 | // destructors. |
| 590 | |
| 591 | // FIXME: Handle references. |
| 592 | if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { |
| 593 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { |
| 594 | if (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor()) |
| 595 | return false; |
| 596 | } |
| 597 | } |
| 598 | |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 599 | // Static data may be deferred, but out-of-line static data members |
| 600 | // cannot be. |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 601 | Linkage L = VD->getLinkage(); |
| 602 | if (L == ExternalLinkage && getContext().getLangOptions().CPlusPlus && |
| 603 | VD->getType()->getLinkage() == UniqueExternalLinkage) |
| 604 | L = UniqueExternalLinkage; |
| 605 | |
| 606 | switch (L) { |
| 607 | case NoLinkage: |
| 608 | case InternalLinkage: |
| 609 | case UniqueExternalLinkage: |
Fariborz Jahanian | 393c247 | 2009-11-05 18:03:03 +0000 | [diff] [blame] | 610 | // Initializer has side effects? |
| 611 | if (VD->getInit() && VD->getInit()->HasSideEffects(Context)) |
| 612 | return false; |
| 613 | return !(VD->isStaticDataMember() && VD->isOutOfLine()); |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 614 | |
| 615 | case ExternalLinkage: |
| 616 | break; |
Fariborz Jahanian | 393c247 | 2009-11-05 18:03:03 +0000 | [diff] [blame] | 617 | } |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 618 | |
Fariborz Jahanian | 393c247 | 2009-11-05 18:03:03 +0000 | [diff] [blame] | 619 | return false; |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 620 | } |
| 621 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 622 | void CodeGenModule::EmitGlobal(GlobalDecl GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 623 | const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 624 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 625 | // If this is an alias definition (which otherwise looks like a declaration) |
| 626 | // emit it now. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 627 | if (Global->hasAttr<AliasAttr>()) |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 628 | return EmitAliasDefinition(Global); |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 629 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 630 | // Ignore declarations, they will be emitted on their first use. |
Daniel Dunbar | 5e1e1f9 | 2009-03-19 08:27:24 +0000 | [diff] [blame] | 631 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 632 | // Forward declarations are emitted lazily on first use. |
| 633 | if (!FD->isThisDeclarationADefinition()) |
| 634 | return; |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 635 | } else { |
| 636 | const VarDecl *VD = cast<VarDecl>(Global); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 637 | assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); |
| 638 | |
Douglas Gregor | a9a55c0 | 2010-02-06 05:15:45 +0000 | [diff] [blame] | 639 | if (VD->isThisDeclarationADefinition() != VarDecl::Definition) |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 640 | return; |
Nate Begeman | 4c13b7a | 2008-04-20 06:29:50 +0000 | [diff] [blame] | 641 | } |
| 642 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 643 | // Defer code generation when possible if this is a static definition, inline |
| 644 | // function etc. These we only want to emit if they are used. |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 645 | if (MayDeferGeneration(Global)) { |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 646 | // If the value has already been used, add it directly to the |
| 647 | // DeferredDeclsToEmit list. |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 648 | const char *MangledName = getMangledName(GD); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 649 | if (GlobalDeclMap.count(MangledName)) |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 650 | DeferredDeclsToEmit.push_back(GD); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 651 | else { |
| 652 | // Otherwise, remember that we saw a deferred decl with this name. The |
| 653 | // first use of the mangled name will cause it to move into |
| 654 | // DeferredDeclsToEmit. |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 655 | DeferredDecls[MangledName] = GD; |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 656 | } |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 657 | return; |
| 658 | } |
| 659 | |
| 660 | // Otherwise emit the definition. |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 661 | EmitGlobalDefinition(GD); |
Nate Begeman | 4c13b7a | 2008-04-20 06:29:50 +0000 | [diff] [blame] | 662 | } |
| 663 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 664 | void CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 665 | const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 666 | |
Anders Carlsson | 8e2efcc | 2009-10-27 14:32:27 +0000 | [diff] [blame] | 667 | PrettyStackTraceDecl CrashInfo((ValueDecl *)D, D->getLocation(), |
| 668 | Context.getSourceManager(), |
| 669 | "Generating code for declaration"); |
| 670 | |
Eli Friedman | 72649ed | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 671 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { |
Anders Carlsson | 1a5e0d7 | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 672 | getVtableInfo().MaybeEmitVtable(GD); |
Eli Friedman | 72649ed | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 673 | if (MD->isVirtual() && MD->isOutOfLine() && |
| 674 | (!isa<CXXDestructorDecl>(D) || GD.getDtorType() != Dtor_Base)) { |
Eli Friedman | b455f0e | 2009-12-07 23:56:34 +0000 | [diff] [blame] | 675 | if (isa<CXXDestructorDecl>(D)) { |
| 676 | GlobalDecl CanonGD(cast<CXXDestructorDecl>(D->getCanonicalDecl()), |
| 677 | GD.getDtorType()); |
| 678 | BuildThunksForVirtual(CanonGD); |
| 679 | } else { |
| 680 | BuildThunksForVirtual(MD->getCanonicalDecl()); |
| 681 | } |
Eli Friedman | 72649ed | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 682 | } |
| 683 | } |
Anders Carlsson | 1a5e0d7 | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 684 | |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 685 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) |
| 686 | EmitCXXConstructor(CD, GD.getCtorType()); |
Anders Carlsson | 7267c16 | 2009-05-29 21:03:38 +0000 | [diff] [blame] | 687 | else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) |
| 688 | EmitCXXDestructor(DD, GD.getDtorType()); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 689 | else if (isa<FunctionDecl>(D)) |
| 690 | EmitGlobalFunctionDefinition(GD); |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 691 | else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 692 | EmitGlobalVarDefinition(VD); |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 693 | else { |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 694 | assert(0 && "Invalid argument to EmitGlobalDefinition()"); |
| 695 | } |
| 696 | } |
| 697 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 698 | /// GetOrCreateLLVMFunction - If the specified mangled name is not in the |
| 699 | /// module, create and return an llvm Function with the specified type. If there |
| 700 | /// is something in the module with the specified name, return it potentially |
| 701 | /// bitcasted to the right type. |
| 702 | /// |
| 703 | /// If D is non-null, it specifies a decl that correspond to this. This is used |
| 704 | /// to set the attributes on the function when it is first created. |
| 705 | llvm::Constant *CodeGenModule::GetOrCreateLLVMFunction(const char *MangledName, |
| 706 | const llvm::Type *Ty, |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 707 | GlobalDecl D) { |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 708 | // Lookup the entry, lazily creating it if necessary. |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 709 | llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; |
| 710 | if (Entry) { |
| 711 | if (Entry->getType()->getElementType() == Ty) |
| 712 | return Entry; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 713 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 714 | // Make sure the result is of the correct type. |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 715 | const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 716 | return llvm::ConstantExpr::getBitCast(Entry, PTy); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 717 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 718 | |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 719 | // This function doesn't have a complete type (for example, the return |
| 720 | // type is an incomplete struct). Use a fake type instead, and make |
| 721 | // sure not to try to set attributes. |
| 722 | bool IsIncompleteFunction = false; |
| 723 | if (!isa<llvm::FunctionType>(Ty)) { |
| 724 | Ty = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), |
| 725 | std::vector<const llvm::Type*>(), false); |
| 726 | IsIncompleteFunction = true; |
| 727 | } |
| 728 | llvm::Function *F = llvm::Function::Create(cast<llvm::FunctionType>(Ty), |
| 729 | llvm::Function::ExternalLinkage, |
| 730 | "", &getModule()); |
| 731 | F->setName(MangledName); |
| 732 | if (D.getDecl()) |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 733 | SetFunctionAttributes(D, F, IsIncompleteFunction); |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 734 | Entry = F; |
| 735 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 736 | // This is the first use or definition of a mangled name. If there is a |
| 737 | // deferred decl with this name, remember that we need to emit it at the end |
| 738 | // of the file. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 739 | llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 740 | DeferredDecls.find(MangledName); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 741 | if (DDI != DeferredDecls.end()) { |
| 742 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit |
| 743 | // list, and remove it from DeferredDecls (since we don't need it anymore). |
| 744 | DeferredDeclsToEmit.push_back(DDI->second); |
| 745 | DeferredDecls.erase(DDI); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 746 | } else if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl())) { |
Chris Lattner | 0c337ed | 2009-05-12 21:02:27 +0000 | [diff] [blame] | 747 | // If this the first reference to a C++ inline function in a class, queue up |
| 748 | // the deferred function body for emission. These are not seen as |
| 749 | // top-level declarations. |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 750 | if (FD->isThisDeclarationADefinition() && MayDeferGeneration(FD)) |
| 751 | DeferredDeclsToEmit.push_back(D); |
Fariborz Jahanian | c7ff8e1 | 2009-07-30 23:22:00 +0000 | [diff] [blame] | 752 | // A called constructor which has no definition or declaration need be |
| 753 | // synthesized. |
| 754 | else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(FD)) { |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame^] | 755 | if (CD->isImplicit()) { |
| 756 | assert (CD->isUsed()); |
Eli Friedman | 15233e5 | 2009-11-26 07:40:08 +0000 | [diff] [blame] | 757 | DeferredDeclsToEmit.push_back(D); |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame^] | 758 | } |
Eli Friedman | 15233e5 | 2009-11-26 07:40:08 +0000 | [diff] [blame] | 759 | } else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(FD)) { |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame^] | 760 | if (DD->isImplicit()) { |
| 761 | assert (DD->isUsed()); |
Eli Friedman | 15233e5 | 2009-11-26 07:40:08 +0000 | [diff] [blame] | 762 | DeferredDeclsToEmit.push_back(D); |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame^] | 763 | } |
Eli Friedman | 15233e5 | 2009-11-26 07:40:08 +0000 | [diff] [blame] | 764 | } else if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame^] | 765 | if (MD->isCopyAssignment() && MD->isImplicit()) { |
| 766 | assert (MD->isUsed()); |
Fariborz Jahanian | c7ff8e1 | 2009-07-30 23:22:00 +0000 | [diff] [blame] | 767 | DeferredDeclsToEmit.push_back(D); |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame^] | 768 | } |
Fariborz Jahanian | c7ff8e1 | 2009-07-30 23:22:00 +0000 | [diff] [blame] | 769 | } |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 770 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 771 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 772 | return F; |
| 773 | } |
| 774 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 775 | /// GetAddrOfFunction - Return the address of the given function. If Ty is |
| 776 | /// non-null, then this function will use the specified type if it has to |
| 777 | /// create it (this occurs when we see a definition of the function). |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 778 | llvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 779 | const llvm::Type *Ty) { |
| 780 | // If there was no specific requested type, just convert it now. |
| 781 | if (!Ty) |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 782 | Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); |
Douglas Gregor | 4fe95f9 | 2009-09-04 19:04:08 +0000 | [diff] [blame] | 783 | return GetOrCreateLLVMFunction(getMangledName(GD), Ty, GD); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 784 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 785 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 786 | /// CreateRuntimeFunction - Create a new runtime function with the specified |
| 787 | /// type and name. |
| 788 | llvm::Constant * |
| 789 | CodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, |
| 790 | const char *Name) { |
| 791 | // Convert Name to be a uniqued string from the IdentifierInfo table. |
Daniel Dunbar | e013d68 | 2009-10-18 20:26:12 +0000 | [diff] [blame] | 792 | Name = getContext().Idents.get(Name).getNameStart(); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 793 | return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 794 | } |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 795 | |
Eli Friedman | 20e098b | 2009-12-11 21:23:03 +0000 | [diff] [blame] | 796 | static bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D) { |
John McCall | 8878686 | 2010-02-08 21:46:50 +0000 | [diff] [blame] | 797 | if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) |
Eli Friedman | 20e098b | 2009-12-11 21:23:03 +0000 | [diff] [blame] | 798 | return false; |
| 799 | if (Context.getLangOptions().CPlusPlus && |
| 800 | Context.getBaseElementType(D->getType())->getAs<RecordType>()) { |
| 801 | // FIXME: We should do something fancier here! |
| 802 | return false; |
| 803 | } |
| 804 | return true; |
| 805 | } |
| 806 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 807 | /// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, |
| 808 | /// create and return an llvm GlobalVariable with the specified type. If there |
| 809 | /// is something in the module with the specified name, return it potentially |
| 810 | /// bitcasted to the right type. |
| 811 | /// |
| 812 | /// If D is non-null, it specifies a decl that correspond to this. This is used |
| 813 | /// to set the attributes on the global when it is first created. |
| 814 | llvm::Constant *CodeGenModule::GetOrCreateLLVMGlobal(const char *MangledName, |
| 815 | const llvm::PointerType*Ty, |
| 816 | const VarDecl *D) { |
Daniel Dunbar | 3c827a7 | 2008-08-05 23:31:02 +0000 | [diff] [blame] | 817 | // Lookup the entry, lazily creating it if necessary. |
Chris Lattner | 5d4f5c7 | 2009-03-21 08:06:59 +0000 | [diff] [blame] | 818 | llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 819 | if (Entry) { |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 820 | if (Entry->getType() == Ty) |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 821 | return Entry; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 822 | |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 823 | // Make sure the result is of the correct type. |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 824 | return llvm::ConstantExpr::getBitCast(Entry, Ty); |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 825 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 826 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 827 | // This is the first use or definition of a mangled name. If there is a |
| 828 | // deferred decl with this name, remember that we need to emit it at the end |
| 829 | // of the file. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 830 | llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 831 | DeferredDecls.find(MangledName); |
| 832 | if (DDI != DeferredDecls.end()) { |
| 833 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit |
| 834 | // list, and remove it from DeferredDecls (since we don't need it anymore). |
| 835 | DeferredDeclsToEmit.push_back(DDI->second); |
| 836 | DeferredDecls.erase(DDI); |
| 837 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 838 | |
| 839 | llvm::GlobalVariable *GV = |
| 840 | new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 841 | llvm::GlobalValue::ExternalLinkage, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 842 | 0, "", 0, |
Eli Friedman | 56ebe50 | 2009-04-19 21:05:03 +0000 | [diff] [blame] | 843 | false, Ty->getAddressSpace()); |
Chris Lattner | d972678 | 2009-03-22 00:12:30 +0000 | [diff] [blame] | 844 | GV->setName(MangledName); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 845 | |
| 846 | // Handle things which are present even on external declarations. |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 847 | if (D) { |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 848 | // FIXME: This code is overly simple and should be merged with other global |
| 849 | // handling. |
Eli Friedman | 20e098b | 2009-12-11 21:23:03 +0000 | [diff] [blame] | 850 | GV->setConstant(DeclIsConstantGlobal(Context, D)); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 851 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 852 | // FIXME: Merge with other attribute handling code. |
| 853 | if (D->getStorageClass() == VarDecl::PrivateExtern) |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 854 | GV->setVisibility(llvm::GlobalValue::HiddenVisibility); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 855 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 856 | if (D->hasAttr<WeakAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 857 | D->hasAttr<WeakImportAttr>()) |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 858 | GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); |
Eli Friedman | 56ebe50 | 2009-04-19 21:05:03 +0000 | [diff] [blame] | 859 | |
| 860 | GV->setThreadLocal(D->isThreadSpecified()); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 861 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 862 | |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 863 | return Entry = GV; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 864 | } |
| 865 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 866 | |
| 867 | /// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the |
| 868 | /// given global variable. If Ty is non-null and if the global doesn't exist, |
| 869 | /// then it will be greated with the specified type instead of whatever the |
| 870 | /// normal requested type would be. |
| 871 | llvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, |
| 872 | const llvm::Type *Ty) { |
| 873 | assert(D->hasGlobalStorage() && "Not a global variable"); |
| 874 | QualType ASTTy = D->getType(); |
| 875 | if (Ty == 0) |
| 876 | Ty = getTypes().ConvertTypeForMem(ASTTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 877 | |
| 878 | const llvm::PointerType *PTy = |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 879 | llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 880 | return GetOrCreateLLVMGlobal(getMangledName(D), PTy, D); |
| 881 | } |
| 882 | |
| 883 | /// CreateRuntimeVariable - Create a new runtime global variable with the |
| 884 | /// specified type and name. |
| 885 | llvm::Constant * |
| 886 | CodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, |
| 887 | const char *Name) { |
| 888 | // Convert Name to be a uniqued string from the IdentifierInfo table. |
Daniel Dunbar | e013d68 | 2009-10-18 20:26:12 +0000 | [diff] [blame] | 889 | Name = getContext().Idents.get(Name).getNameStart(); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 890 | return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 891 | } |
| 892 | |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 893 | void CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { |
| 894 | assert(!D->getInit() && "Cannot emit definite definitions here!"); |
| 895 | |
Douglas Gregor | 7520bd1 | 2009-04-21 19:28:58 +0000 | [diff] [blame] | 896 | if (MayDeferGeneration(D)) { |
| 897 | // If we have not seen a reference to this variable yet, place it |
| 898 | // into the deferred declarations table to be emitted if needed |
| 899 | // later. |
| 900 | const char *MangledName = getMangledName(D); |
| 901 | if (GlobalDeclMap.count(MangledName) == 0) { |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 902 | DeferredDecls[MangledName] = D; |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 903 | return; |
Douglas Gregor | 7520bd1 | 2009-04-21 19:28:58 +0000 | [diff] [blame] | 904 | } |
| 905 | } |
| 906 | |
| 907 | // The tentative definition is the only definition. |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 908 | EmitGlobalVarDefinition(D); |
| 909 | } |
| 910 | |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 911 | llvm::GlobalVariable::LinkageTypes |
| 912 | CodeGenModule::getVtableLinkage(const CXXRecordDecl *RD) { |
Douglas Gregor | dffb801 | 2010-01-06 22:00:56 +0000 | [diff] [blame] | 913 | if (RD->isInAnonymousNamespace() || !RD->hasLinkage()) |
| 914 | return llvm::GlobalVariable::InternalLinkage; |
| 915 | |
| 916 | if (const CXXMethodDecl *KeyFunction |
| 917 | = RD->getASTContext().getKeyFunction(RD)) { |
| 918 | // If this class has a key function, use that to determine the linkage of |
| 919 | // the vtable. |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 920 | const FunctionDecl *Def = 0; |
| 921 | if (KeyFunction->getBody(Def)) |
| 922 | KeyFunction = cast<CXXMethodDecl>(Def); |
Douglas Gregor | dffb801 | 2010-01-06 22:00:56 +0000 | [diff] [blame] | 923 | |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 924 | switch (KeyFunction->getTemplateSpecializationKind()) { |
| 925 | case TSK_Undeclared: |
| 926 | case TSK_ExplicitSpecialization: |
| 927 | if (KeyFunction->isInlined()) |
| 928 | return llvm::GlobalVariable::WeakODRLinkage; |
| 929 | |
| 930 | return llvm::GlobalVariable::ExternalLinkage; |
| 931 | |
| 932 | case TSK_ImplicitInstantiation: |
| 933 | case TSK_ExplicitInstantiationDefinition: |
| 934 | return llvm::GlobalVariable::WeakODRLinkage; |
| 935 | |
| 936 | case TSK_ExplicitInstantiationDeclaration: |
| 937 | // FIXME: Use available_externally linkage. However, this currently |
| 938 | // breaks LLVM's build due to undefined symbols. |
| 939 | // return llvm::GlobalVariable::AvailableExternallyLinkage; |
| 940 | return llvm::GlobalVariable::WeakODRLinkage; |
| 941 | } |
Douglas Gregor | dffb801 | 2010-01-06 22:00:56 +0000 | [diff] [blame] | 942 | } |
| 943 | |
| 944 | switch (RD->getTemplateSpecializationKind()) { |
| 945 | case TSK_Undeclared: |
| 946 | case TSK_ExplicitSpecialization: |
| 947 | case TSK_ImplicitInstantiation: |
| 948 | case TSK_ExplicitInstantiationDefinition: |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 949 | return llvm::GlobalVariable::WeakODRLinkage; |
Douglas Gregor | dffb801 | 2010-01-06 22:00:56 +0000 | [diff] [blame] | 950 | |
| 951 | case TSK_ExplicitInstantiationDeclaration: |
| 952 | // FIXME: Use available_externally linkage. However, this currently |
| 953 | // breaks LLVM's build due to undefined symbols. |
| 954 | // return llvm::GlobalVariable::AvailableExternallyLinkage; |
| 955 | return llvm::GlobalVariable::WeakODRLinkage; |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 956 | } |
| 957 | |
| 958 | // Silence GCC warning. |
| 959 | return llvm::GlobalVariable::WeakODRLinkage; |
| 960 | } |
| 961 | |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 962 | static CodeGenModule::GVALinkage |
| 963 | GetLinkageForVariable(ASTContext &Context, const VarDecl *VD) { |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 964 | // If this is a static data member, compute the kind of template |
| 965 | // specialization. Otherwise, this variable is not part of a |
| 966 | // template. |
| 967 | TemplateSpecializationKind TSK = TSK_Undeclared; |
| 968 | if (VD->isStaticDataMember()) |
| 969 | TSK = VD->getTemplateSpecializationKind(); |
| 970 | |
| 971 | Linkage L = VD->getLinkage(); |
| 972 | if (L == ExternalLinkage && Context.getLangOptions().CPlusPlus && |
| 973 | VD->getType()->getLinkage() == UniqueExternalLinkage) |
| 974 | L = UniqueExternalLinkage; |
| 975 | |
| 976 | switch (L) { |
| 977 | case NoLinkage: |
| 978 | case InternalLinkage: |
| 979 | case UniqueExternalLinkage: |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 980 | return CodeGenModule::GVA_Internal; |
| 981 | |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 982 | case ExternalLinkage: |
| 983 | switch (TSK) { |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 984 | case TSK_Undeclared: |
| 985 | case TSK_ExplicitSpecialization: |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 986 | |
| 987 | // FIXME: ExplicitInstantiationDefinition should be weak! |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 988 | case TSK_ExplicitInstantiationDefinition: |
| 989 | return CodeGenModule::GVA_StrongExternal; |
| 990 | |
| 991 | case TSK_ExplicitInstantiationDeclaration: |
Jeffrey Yasskin | 9f61aa9 | 2009-12-12 05:05:38 +0000 | [diff] [blame] | 992 | llvm_unreachable("Variable should not be instantiated"); |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 993 | // Fall through to treat this like any other instantiation. |
| 994 | |
| 995 | case TSK_ImplicitInstantiation: |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 996 | return CodeGenModule::GVA_TemplateInstantiation; |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 997 | } |
| 998 | } |
Eli Friedman | bd94ab9 | 2009-11-26 02:52:12 +0000 | [diff] [blame] | 999 | |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1000 | return CodeGenModule::GVA_StrongExternal; |
| 1001 | } |
| 1002 | |
Ken Dyck | 687cc4a | 2010-01-26 13:48:07 +0000 | [diff] [blame] | 1003 | CharUnits CodeGenModule::GetTargetTypeStoreSize(const llvm::Type *Ty) const { |
| 1004 | return CharUnits::fromQuantity( |
| 1005 | TheTargetData.getTypeStoreSizeInBits(Ty) / Context.getCharWidth()); |
| 1006 | } |
| 1007 | |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1008 | void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { |
Chris Lattner | 8f32f71 | 2007-07-14 00:23:28 +0000 | [diff] [blame] | 1009 | llvm::Constant *Init = 0; |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1010 | QualType ASTTy = D->getType(); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 1011 | bool NonConstInit = false; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1012 | |
Sebastian Redl | 31310a2 | 2010-02-01 20:16:42 +0000 | [diff] [blame] | 1013 | const Expr *InitExpr = D->getAnyInitializer(); |
Anders Carlsson | 3bb9269 | 2010-01-26 17:43:42 +0000 | [diff] [blame] | 1014 | |
| 1015 | if (!InitExpr) { |
Eli Friedman | cd5f4aa | 2008-05-30 20:39:54 +0000 | [diff] [blame] | 1016 | // This is a tentative definition; tentative definitions are |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 1017 | // implicitly initialized with { 0 }. |
| 1018 | // |
| 1019 | // Note that tentative definitions are only emitted at the end of |
| 1020 | // a translation unit, so they should never have incomplete |
| 1021 | // type. In addition, EmitTentativeDefinition makes sure that we |
| 1022 | // never attempt to emit a tentative definition if a real one |
| 1023 | // exists. A use may still exists, however, so we still may need |
| 1024 | // to do a RAUW. |
| 1025 | assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); |
Anders Carlsson | b0d0ea0 | 2009-08-02 21:18:22 +0000 | [diff] [blame] | 1026 | Init = EmitNullConstant(D->getType()); |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1027 | } else { |
Anders Carlsson | 3bb9269 | 2010-01-26 17:43:42 +0000 | [diff] [blame] | 1028 | Init = EmitConstantExpr(InitExpr, D->getType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1029 | |
Eli Friedman | 6e656f4 | 2009-02-20 01:18:21 +0000 | [diff] [blame] | 1030 | if (!Init) { |
Anders Carlsson | 3bb9269 | 2010-01-26 17:43:42 +0000 | [diff] [blame] | 1031 | QualType T = InitExpr->getType(); |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 1032 | if (getLangOptions().CPlusPlus) { |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 1033 | EmitCXXGlobalVarDeclInitFunc(D); |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 1034 | Init = EmitNullConstant(T); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 1035 | NonConstInit = true; |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 1036 | } else { |
| 1037 | ErrorUnsupported(D, "static initializer"); |
| 1038 | Init = llvm::UndefValue::get(getTypes().ConvertType(T)); |
| 1039 | } |
Eli Friedman | 6e656f4 | 2009-02-20 01:18:21 +0000 | [diff] [blame] | 1040 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1041 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1042 | |
Chris Lattner | 2d58406 | 2009-03-21 08:13:05 +0000 | [diff] [blame] | 1043 | const llvm::Type* InitType = Init->getType(); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1044 | llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1045 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1046 | // Strip off a bitcast if we got one back. |
| 1047 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1048 | assert(CE->getOpcode() == llvm::Instruction::BitCast || |
| 1049 | // all zero index gep. |
| 1050 | CE->getOpcode() == llvm::Instruction::GetElementPtr); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1051 | Entry = CE->getOperand(0); |
| 1052 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1053 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1054 | // Entry is now either a Function or GlobalVariable. |
| 1055 | llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1056 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1057 | // We have a definition after a declaration with the wrong type. |
| 1058 | // We must make a new GlobalVariable* and update everything that used OldGV |
| 1059 | // (a declaration or tentative definition) with the new GlobalVariable* |
| 1060 | // (which will be a definition). |
| 1061 | // |
| 1062 | // This happens if there is a prototype for a global (e.g. |
| 1063 | // "extern int x[];") and then a definition of a different type (e.g. |
| 1064 | // "int x[10];"). This also happens when an initializer has a different type |
| 1065 | // from the type of the global (this happens with unions). |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1066 | if (GV == 0 || |
| 1067 | GV->getType()->getElementType() != InitType || |
| 1068 | GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1069 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1070 | // Remove the old entry from GlobalDeclMap so that we'll create a new one. |
| 1071 | GlobalDeclMap.erase(getMangledName(D)); |
Daniel Dunbar | 232350d | 2009-02-19 05:36:41 +0000 | [diff] [blame] | 1072 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1073 | // Make a new global with the correct type, this is now guaranteed to work. |
| 1074 | GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1075 | GV->takeName(cast<llvm::GlobalValue>(Entry)); |
| 1076 | |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1077 | // Replace all uses of the old global with the new global |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1078 | llvm::Constant *NewPtrForOldDecl = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1079 | llvm::ConstantExpr::getBitCast(GV, Entry->getType()); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1080 | Entry->replaceAllUsesWith(NewPtrForOldDecl); |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1081 | |
| 1082 | // Erase the old global, since it is no longer used. |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1083 | cast<llvm::GlobalValue>(Entry)->eraseFromParent(); |
Chris Lattner | 8f32f71 | 2007-07-14 00:23:28 +0000 | [diff] [blame] | 1084 | } |
Devang Patel | 8e53e72 | 2007-10-26 16:31:40 +0000 | [diff] [blame] | 1085 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1086 | if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1087 | SourceManager &SM = Context.getSourceManager(); |
| 1088 | AddAnnotation(EmitAnnotateAttr(GV, AA, |
Chris Lattner | f7cf85b | 2009-01-16 07:36:28 +0000 | [diff] [blame] | 1089 | SM.getInstantiationLineNumber(D->getLocation()))); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1090 | } |
| 1091 | |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1092 | GV->setInitializer(Init); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1093 | |
| 1094 | // If it is safe to mark the global 'constant', do so now. |
| 1095 | GV->setConstant(false); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 1096 | if (!NonConstInit && DeclIsConstantGlobal(Context, D)) |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1097 | GV->setConstant(true); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1098 | |
Ken Dyck | 8b752f1 | 2010-01-27 17:10:57 +0000 | [diff] [blame] | 1099 | GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); |
Eli Friedman | 08d7802 | 2008-05-29 11:10:27 +0000 | [diff] [blame] | 1100 | |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1101 | // Set the llvm linkage type as appropriate. |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1102 | GVALinkage Linkage = GetLinkageForVariable(getContext(), D); |
Douglas Gregor | a0f00a7 | 2009-10-14 21:36:34 +0000 | [diff] [blame] | 1103 | if (Linkage == GVA_Internal) |
Chris Lattner | 8fabd78 | 2008-05-04 01:44:26 +0000 | [diff] [blame] | 1104 | GV->setLinkage(llvm::Function::InternalLinkage); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1105 | else if (D->hasAttr<DLLImportAttr>()) |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1106 | GV->setLinkage(llvm::Function::DLLImportLinkage); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1107 | else if (D->hasAttr<DLLExportAttr>()) |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1108 | GV->setLinkage(llvm::Function::DLLExportLinkage); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1109 | else if (D->hasAttr<WeakAttr>()) { |
| 1110 | if (GV->isConstant()) |
| 1111 | GV->setLinkage(llvm::GlobalVariable::WeakODRLinkage); |
| 1112 | else |
| 1113 | GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1114 | } else if (Linkage == GVA_TemplateInstantiation) |
| 1115 | GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); |
Daniel Dunbar | 1bc5c03 | 2009-11-30 08:40:34 +0000 | [diff] [blame] | 1116 | else if (!getLangOptions().CPlusPlus && !CodeGenOpts.NoCommon && |
Chris Lattner | 309457d | 2009-08-05 04:56:58 +0000 | [diff] [blame] | 1117 | !D->hasExternalStorage() && !D->getInit() && |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1118 | !D->getAttr<SectionAttr>()) { |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1119 | GV->setLinkage(llvm::GlobalVariable::CommonLinkage); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1120 | // common vars aren't constant even if declared const. |
| 1121 | GV->setConstant(false); |
| 1122 | } else |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1123 | GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 1124 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1125 | SetCommonAttributes(D, GV); |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1126 | |
Sanjiv Gupta | 686226b | 2008-06-05 08:59:10 +0000 | [diff] [blame] | 1127 | // Emit global variable debug information. |
Chris Lattner | 2d58406 | 2009-03-21 08:13:05 +0000 | [diff] [blame] | 1128 | if (CGDebugInfo *DI = getDebugInfo()) { |
Daniel Dunbar | 66031a5 | 2008-10-17 16:15:48 +0000 | [diff] [blame] | 1129 | DI->setLocation(D->getLocation()); |
Sanjiv Gupta | 686226b | 2008-06-05 08:59:10 +0000 | [diff] [blame] | 1130 | DI->EmitGlobalVariable(GV, D); |
| 1131 | } |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1132 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1133 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1134 | /// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we |
| 1135 | /// implement a function with no prototype, e.g. "int foo() {}". If there are |
| 1136 | /// existing call uses of the old function in the module, this adjusts them to |
| 1137 | /// call the new function directly. |
| 1138 | /// |
| 1139 | /// This is not just a cleanup: the always_inline pass requires direct calls to |
| 1140 | /// functions to be able to inline them. If there is a bitcast in the way, it |
| 1141 | /// won't inline them. Instcombine normally deletes these calls, but it isn't |
| 1142 | /// run at -O0. |
| 1143 | static void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, |
| 1144 | llvm::Function *NewFn) { |
| 1145 | // If we're redefining a global as a function, don't transform it. |
| 1146 | llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); |
| 1147 | if (OldFn == 0) return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1148 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1149 | const llvm::Type *NewRetTy = NewFn->getReturnType(); |
| 1150 | llvm::SmallVector<llvm::Value*, 4> ArgList; |
| 1151 | |
| 1152 | for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); |
| 1153 | UI != E; ) { |
| 1154 | // TODO: Do invokes ever occur in C code? If so, we should handle them too. |
Chris Lattner | 08c93a7 | 2009-06-04 16:47:43 +0000 | [diff] [blame] | 1155 | unsigned OpNo = UI.getOperandNo(); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1156 | llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*UI++); |
Chris Lattner | 08c93a7 | 2009-06-04 16:47:43 +0000 | [diff] [blame] | 1157 | if (!CI || OpNo != 0) continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1158 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1159 | // If the return types don't match exactly, and if the call isn't dead, then |
| 1160 | // we can't transform this call. |
| 1161 | if (CI->getType() != NewRetTy && !CI->use_empty()) |
| 1162 | continue; |
| 1163 | |
| 1164 | // If the function was passed too few arguments, don't transform. If extra |
| 1165 | // arguments were passed, we silently drop them. If any of the types |
| 1166 | // mismatch, we don't transform. |
| 1167 | unsigned ArgNo = 0; |
| 1168 | bool DontTransform = false; |
| 1169 | for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), |
| 1170 | E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { |
| 1171 | if (CI->getNumOperands()-1 == ArgNo || |
| 1172 | CI->getOperand(ArgNo+1)->getType() != AI->getType()) { |
| 1173 | DontTransform = true; |
| 1174 | break; |
| 1175 | } |
| 1176 | } |
| 1177 | if (DontTransform) |
| 1178 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1179 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1180 | // Okay, we can transform this. Create the new call instruction and copy |
| 1181 | // over the required information. |
| 1182 | ArgList.append(CI->op_begin()+1, CI->op_begin()+1+ArgNo); |
| 1183 | llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), |
| 1184 | ArgList.end(), "", CI); |
| 1185 | ArgList.clear(); |
Benjamin Kramer | ffbb15e | 2009-10-05 13:47:21 +0000 | [diff] [blame] | 1186 | if (!NewCall->getType()->isVoidTy()) |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1187 | NewCall->takeName(CI); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1188 | NewCall->setAttributes(CI->getAttributes()); |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 1189 | NewCall->setCallingConv(CI->getCallingConv()); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1190 | |
| 1191 | // Finally, remove the old call, replacing any uses with the new one. |
Chris Lattner | 00549fc | 2009-10-14 05:49:21 +0000 | [diff] [blame] | 1192 | if (!CI->use_empty()) |
| 1193 | CI->replaceAllUsesWith(NewCall); |
Devang Patel | 3b122bc | 2009-10-13 17:02:04 +0000 | [diff] [blame] | 1194 | |
Devang Patel | aa40454 | 2009-10-14 17:03:29 +0000 | [diff] [blame] | 1195 | // Copy any custom metadata attached with CI. |
Chris Lattner | 1280708 | 2009-12-29 07:49:13 +0000 | [diff] [blame] | 1196 | if (llvm::MDNode *DbgNode = CI->getMetadata("dbg")) |
| 1197 | NewCall->setMetadata("dbg", DbgNode); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1198 | CI->eraseFromParent(); |
| 1199 | } |
| 1200 | } |
| 1201 | |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1202 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1203 | void CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1204 | const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); |
John McCall | c0bf462 | 2010-02-23 00:48:20 +0000 | [diff] [blame] | 1205 | const llvm::FunctionType *Ty = getTypes().GetFunctionType(GD); |
Daniel Dunbar | d5d3180 | 2009-02-19 07:15:39 +0000 | [diff] [blame] | 1206 | |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 1207 | // Get or create the prototype for the function. |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1208 | llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1209 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1210 | // Strip off a bitcast if we got one back. |
| 1211 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { |
| 1212 | assert(CE->getOpcode() == llvm::Instruction::BitCast); |
| 1213 | Entry = CE->getOperand(0); |
| 1214 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1215 | |
| 1216 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1217 | if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1218 | llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1219 | |
Daniel Dunbar | 4274581 | 2009-03-09 23:53:08 +0000 | [diff] [blame] | 1220 | // If the types mismatch then we have to rewrite the definition. |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1221 | assert(OldFn->isDeclaration() && |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1222 | "Shouldn't replace non-declaration"); |
Chris Lattner | 3480950 | 2009-03-21 08:53:37 +0000 | [diff] [blame] | 1223 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 1224 | // F is the Function* for the one with the wrong type, we must make a new |
| 1225 | // Function* and update everything that used F (a declaration) with the new |
| 1226 | // Function* (which will be a definition). |
| 1227 | // |
| 1228 | // This happens if there is a prototype for a function |
| 1229 | // (e.g. "int f()") and then a definition of a different type |
| 1230 | // (e.g. "int f(int x)"). Start by making a new function of the |
| 1231 | // correct type, RAUW, then steal the name. |
Chris Lattner | 3480950 | 2009-03-21 08:53:37 +0000 | [diff] [blame] | 1232 | GlobalDeclMap.erase(getMangledName(D)); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1233 | llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1234 | NewFn->takeName(OldFn); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1235 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1236 | // If this is an implementation of a function without a prototype, try to |
| 1237 | // replace any existing uses of the function (which may be calls) with uses |
| 1238 | // of the new function |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 1239 | if (D->getType()->isFunctionNoProtoType()) { |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1240 | ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 1241 | OldFn->removeDeadConstantUsers(); |
| 1242 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1243 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 1244 | // Replace uses of F with the Function we will endow with a body. |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1245 | if (!Entry->use_empty()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1246 | llvm::Constant *NewPtrForOldDecl = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1247 | llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1248 | Entry->replaceAllUsesWith(NewPtrForOldDecl); |
| 1249 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1250 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 1251 | // Ok, delete the old function now, which is dead. |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1252 | OldFn->eraseFromParent(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1253 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1254 | Entry = NewFn; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1255 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1256 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1257 | llvm::Function *Fn = cast<llvm::Function>(Entry); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1258 | |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1259 | CodeGenFunction(*this).GenerateCode(D, Fn); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 1260 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1261 | SetFunctionDefinitionAttributes(D, Fn); |
| 1262 | SetLLVMFunctionAttributesForDefinition(D, Fn); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1263 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1264 | if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1265 | AddGlobalCtor(Fn, CA->getPriority()); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1266 | if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1267 | AddGlobalDtor(Fn, DA->getPriority()); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1268 | } |
| 1269 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1270 | void CodeGenModule::EmitAliasDefinition(const ValueDecl *D) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1271 | const AliasAttr *AA = D->getAttr<AliasAttr>(); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1272 | assert(AA && "Not an alias?"); |
| 1273 | |
| 1274 | const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1275 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1276 | // Unique the name through the identifier table. |
Ted Kremenek | 3d2c43e | 2010-02-11 05:28:37 +0000 | [diff] [blame] | 1277 | const char *AliaseeName = |
| 1278 | getContext().Idents.get(AA->getAliasee()).getNameStart(); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1279 | |
| 1280 | // Create a reference to the named value. This ensures that it is emitted |
| 1281 | // if a deferred decl. |
| 1282 | llvm::Constant *Aliasee; |
| 1283 | if (isa<llvm::FunctionType>(DeclTy)) |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1284 | Aliasee = GetOrCreateLLVMFunction(AliaseeName, DeclTy, GlobalDecl()); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1285 | else |
| 1286 | Aliasee = GetOrCreateLLVMGlobal(AliaseeName, |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1287 | llvm::PointerType::getUnqual(DeclTy), 0); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1288 | |
| 1289 | // Create the new alias itself, but don't set a name yet. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1290 | llvm::GlobalValue *GA = |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1291 | new llvm::GlobalAlias(Aliasee->getType(), |
| 1292 | llvm::Function::ExternalLinkage, |
| 1293 | "", Aliasee, &getModule()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1294 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1295 | // See if there is already something with the alias' name in the module. |
| 1296 | const char *MangledName = getMangledName(D); |
| 1297 | llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1298 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1299 | if (Entry && !Entry->isDeclaration()) { |
| 1300 | // If there is a definition in the module, then it wins over the alias. |
| 1301 | // This is dubious, but allow it to be safe. Just ignore the alias. |
| 1302 | GA->eraseFromParent(); |
| 1303 | return; |
| 1304 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1305 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1306 | if (Entry) { |
| 1307 | // If there is a declaration in the module, then we had an extern followed |
| 1308 | // by the alias, as in: |
| 1309 | // extern int test6(); |
| 1310 | // ... |
| 1311 | // int test6() __attribute__((alias("test7"))); |
| 1312 | // |
| 1313 | // Remove it and replace uses of it with the alias. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1314 | |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1315 | Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1316 | Entry->getType())); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1317 | Entry->eraseFromParent(); |
| 1318 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1319 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1320 | // Now we know that there is no conflict, set the name. |
| 1321 | Entry = GA; |
| 1322 | GA->setName(MangledName); |
| 1323 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1324 | // Set attributes which are particular to an alias; this is a |
| 1325 | // specialization of the attributes which may be set on a global |
| 1326 | // variable/function. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1327 | if (D->hasAttr<DLLExportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1328 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 1329 | // The dllexport attribute is ignored for undefined symbols. |
Argyrios Kyrtzidis | 6fb0aee | 2009-06-30 02:35:26 +0000 | [diff] [blame] | 1330 | if (FD->getBody()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1331 | GA->setLinkage(llvm::Function::DLLExportLinkage); |
| 1332 | } else { |
| 1333 | GA->setLinkage(llvm::Function::DLLExportLinkage); |
| 1334 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1335 | } else if (D->hasAttr<WeakAttr>() || |
Rafael Espindola | 11e8ce7 | 2010-02-23 22:00:30 +0000 | [diff] [blame] | 1336 | D->hasAttr<WeakRefAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1337 | D->hasAttr<WeakImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1338 | GA->setLinkage(llvm::Function::WeakAnyLinkage); |
| 1339 | } |
| 1340 | |
| 1341 | SetCommonAttributes(D, GA); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1342 | } |
| 1343 | |
Chris Lattner | b808c95 | 2009-03-22 21:56:56 +0000 | [diff] [blame] | 1344 | /// getBuiltinLibFunction - Given a builtin id for a function like |
| 1345 | /// "__builtin_fabsf", return a Function* for "fabsf". |
Daniel Dunbar | 34771b5 | 2009-09-14 04:33:21 +0000 | [diff] [blame] | 1346 | llvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, |
| 1347 | unsigned BuiltinID) { |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1348 | assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1349 | Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1350 | "isn't a lib fn"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1351 | |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1352 | // Get the name, skip over the __builtin_ prefix (if necessary). |
| 1353 | const char *Name = Context.BuiltinInfo.GetName(BuiltinID); |
| 1354 | if (Context.BuiltinInfo.isLibFunction(BuiltinID)) |
| 1355 | Name += 10; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1356 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1357 | const llvm::FunctionType *Ty = |
Eli Friedman | 386ca78 | 2009-12-09 03:05:59 +0000 | [diff] [blame] | 1358 | cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1359 | |
Chris Lattner | b808c95 | 2009-03-22 21:56:56 +0000 | [diff] [blame] | 1360 | // Unique the name through the identifier table. |
Daniel Dunbar | e013d68 | 2009-10-18 20:26:12 +0000 | [diff] [blame] | 1361 | Name = getContext().Idents.get(Name).getNameStart(); |
Daniel Dunbar | 34771b5 | 2009-09-14 04:33:21 +0000 | [diff] [blame] | 1362 | return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD)); |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1363 | } |
| 1364 | |
Chris Lattner | 7acda7c | 2007-12-18 00:25:38 +0000 | [diff] [blame] | 1365 | llvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, |
| 1366 | unsigned NumTys) { |
| 1367 | return llvm::Intrinsic::getDeclaration(&getModule(), |
| 1368 | (llvm::Intrinsic::ID)IID, Tys, NumTys); |
| 1369 | } |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1370 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1371 | llvm::Function *CodeGenModule::getMemCpyFn() { |
| 1372 | if (MemCpyFn) return MemCpyFn; |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1373 | const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); |
Chris Lattner | 4e8a9e8 | 2008-11-21 16:43:15 +0000 | [diff] [blame] | 1374 | return MemCpyFn = getIntrinsic(llvm::Intrinsic::memcpy, &IntPtr, 1); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1375 | } |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1376 | |
Eli Friedman | 0c99509 | 2008-05-26 12:59:39 +0000 | [diff] [blame] | 1377 | llvm::Function *CodeGenModule::getMemMoveFn() { |
| 1378 | if (MemMoveFn) return MemMoveFn; |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1379 | const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); |
Chris Lattner | 4e8a9e8 | 2008-11-21 16:43:15 +0000 | [diff] [blame] | 1380 | return MemMoveFn = getIntrinsic(llvm::Intrinsic::memmove, &IntPtr, 1); |
Eli Friedman | 0c99509 | 2008-05-26 12:59:39 +0000 | [diff] [blame] | 1381 | } |
| 1382 | |
Lauro Ramos Venancio | 41ef30e | 2008-02-19 22:01:01 +0000 | [diff] [blame] | 1383 | llvm::Function *CodeGenModule::getMemSetFn() { |
| 1384 | if (MemSetFn) return MemSetFn; |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1385 | const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); |
Chris Lattner | 4e8a9e8 | 2008-11-21 16:43:15 +0000 | [diff] [blame] | 1386 | return MemSetFn = getIntrinsic(llvm::Intrinsic::memset, &IntPtr, 1); |
Lauro Ramos Venancio | 41ef30e | 2008-02-19 22:01:01 +0000 | [diff] [blame] | 1387 | } |
Chris Lattner | 7acda7c | 2007-12-18 00:25:38 +0000 | [diff] [blame] | 1388 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1389 | static llvm::StringMapEntry<llvm::Constant*> & |
| 1390 | GetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, |
| 1391 | const StringLiteral *Literal, |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1392 | bool TargetIsLSB, |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1393 | bool &IsUTF16, |
| 1394 | unsigned &StringLength) { |
Daniel Dunbar | df4eee9 | 2009-09-22 03:27:52 +0000 | [diff] [blame] | 1395 | unsigned NumBytes = Literal->getByteLength(); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1396 | |
Daniel Dunbar | f015b03 | 2009-09-22 10:03:52 +0000 | [diff] [blame] | 1397 | // Check for simple case. |
| 1398 | if (!Literal->containsNonAsciiOrNull()) { |
| 1399 | StringLength = NumBytes; |
| 1400 | return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), |
| 1401 | StringLength)); |
| 1402 | } |
| 1403 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1404 | // Otherwise, convert the UTF8 literals into a byte string. |
| 1405 | llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); |
| 1406 | const UTF8 *FromPtr = (UTF8 *)Literal->getStrData(); |
| 1407 | UTF16 *ToPtr = &ToBuf[0]; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1408 | |
| 1409 | ConversionResult Result = ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1410 | &ToPtr, ToPtr + NumBytes, |
| 1411 | strictConversion); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1412 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1413 | // Check for conversion failure. |
| 1414 | if (Result != conversionOK) { |
| 1415 | // FIXME: Have Sema::CheckObjCString() validate the UTF-8 string and remove |
| 1416 | // this duplicate code. |
| 1417 | assert(Result == sourceIllegal && "UTF-8 to UTF-16 conversion failed"); |
Daniel Dunbar | f015b03 | 2009-09-22 10:03:52 +0000 | [diff] [blame] | 1418 | StringLength = NumBytes; |
| 1419 | return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), |
| 1420 | StringLength)); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1421 | } |
| 1422 | |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1423 | // ConvertUTF8toUTF16 returns the length in ToPtr. |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1424 | StringLength = ToPtr - &ToBuf[0]; |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1425 | |
| 1426 | // Render the UTF-16 string into a byte array and convert to the target byte |
| 1427 | // order. |
| 1428 | // |
| 1429 | // FIXME: This isn't something we should need to do here. |
| 1430 | llvm::SmallString<128> AsBytes; |
| 1431 | AsBytes.reserve(StringLength * 2); |
| 1432 | for (unsigned i = 0; i != StringLength; ++i) { |
| 1433 | unsigned short Val = ToBuf[i]; |
| 1434 | if (TargetIsLSB) { |
| 1435 | AsBytes.push_back(Val & 0xFF); |
| 1436 | AsBytes.push_back(Val >> 8); |
| 1437 | } else { |
| 1438 | AsBytes.push_back(Val >> 8); |
| 1439 | AsBytes.push_back(Val & 0xFF); |
| 1440 | } |
| 1441 | } |
Daniel Dunbar | 434da48 | 2009-08-03 21:47:08 +0000 | [diff] [blame] | 1442 | // Append one extra null character, the second is automatically added by our |
| 1443 | // caller. |
| 1444 | AsBytes.push_back(0); |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1445 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1446 | IsUTF16 = true; |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1447 | return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1448 | } |
| 1449 | |
| 1450 | llvm::Constant * |
| 1451 | CodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { |
| 1452 | unsigned StringLength = 0; |
| 1453 | bool isUTF16 = false; |
| 1454 | llvm::StringMapEntry<llvm::Constant*> &Entry = |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1455 | GetConstantCFStringEntry(CFConstantStringMap, Literal, |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1456 | getTargetData().isLittleEndian(), |
| 1457 | isUTF16, StringLength); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1458 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1459 | if (llvm::Constant *C = Entry.getValue()) |
| 1460 | return C; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1461 | |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1462 | llvm::Constant *Zero = |
| 1463 | llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1464 | llvm::Constant *Zeros[] = { Zero, Zero }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1465 | |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1466 | // If we don't already have it, get __CFConstantStringClassReference. |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1467 | if (!CFConstantStringClassRef) { |
| 1468 | const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1469 | Ty = llvm::ArrayType::get(Ty, 0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1470 | llvm::Constant *GV = CreateRuntimeVariable(Ty, |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1471 | "__CFConstantStringClassReference"); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1472 | // Decay array -> ptr |
| 1473 | CFConstantStringClassRef = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1474 | llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1475 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1476 | |
Anders Carlsson | e3daa76 | 2008-11-15 18:54:24 +0000 | [diff] [blame] | 1477 | QualType CFTy = getContext().getCFConstantStringType(); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1478 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1479 | const llvm::StructType *STy = |
Anders Carlsson | e3daa76 | 2008-11-15 18:54:24 +0000 | [diff] [blame] | 1480 | cast<llvm::StructType>(getTypes().ConvertType(CFTy)); |
| 1481 | |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1482 | std::vector<llvm::Constant*> Fields(4); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 1483 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1484 | // Class pointer. |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1485 | Fields[0] = CFConstantStringClassRef; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1486 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1487 | // Flags. |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1488 | const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1489 | Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1490 | llvm::ConstantInt::get(Ty, 0x07C8); |
| 1491 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1492 | // String pointer. |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1493 | llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1494 | |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1495 | llvm::GlobalValue::LinkageTypes Linkage; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1496 | bool isConstant; |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1497 | if (isUTF16) { |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1498 | // FIXME: why do utf strings get "_" labels instead of "L" labels? |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1499 | Linkage = llvm::GlobalValue::InternalLinkage; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1500 | // Note: -fwritable-strings doesn't make unicode CFStrings writable, but |
| 1501 | // does make plain ascii ones writable. |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1502 | isConstant = true; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1503 | } else { |
| 1504 | Linkage = llvm::GlobalValue::PrivateLinkage; |
| 1505 | isConstant = !Features.WritableStrings; |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1506 | } |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1507 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1508 | llvm::GlobalVariable *GV = |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1509 | new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, |
| 1510 | ".str"); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1511 | if (isUTF16) { |
Ken Dyck | 4da244c | 2010-01-26 18:46:23 +0000 | [diff] [blame] | 1512 | CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); |
| 1513 | GV->setAlignment(Align.getQuantity()); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1514 | } |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1515 | Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); |
| 1516 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1517 | // String length. |
| 1518 | Ty = getTypes().ConvertType(getContext().LongTy); |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1519 | Fields[3] = llvm::ConstantInt::get(Ty, StringLength); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1520 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1521 | // The struct. |
Owen Anderson | 08e2524 | 2009-07-27 22:29:56 +0000 | [diff] [blame] | 1522 | C = llvm::ConstantStruct::get(STy, Fields); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1523 | GV = new llvm::GlobalVariable(getModule(), C->getType(), true, |
| 1524 | llvm::GlobalVariable::PrivateLinkage, C, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1525 | "_unnamed_cfstring_"); |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1526 | if (const char *Sect = getContext().Target.getCFStringSection()) |
| 1527 | GV->setSection(Sect); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1528 | Entry.setValue(GV); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1529 | |
Anders Carlsson | 0c67829 | 2007-11-01 00:41:52 +0000 | [diff] [blame] | 1530 | return GV; |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1531 | } |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1532 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1533 | /// GetStringForStringLiteral - Return the appropriate bytes for a |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1534 | /// string literal, properly padded to match the literal type. |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1535 | std::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1536 | const char *StrData = E->getStrData(); |
| 1537 | unsigned Len = E->getByteLength(); |
| 1538 | |
| 1539 | const ConstantArrayType *CAT = |
| 1540 | getContext().getAsConstantArrayType(E->getType()); |
| 1541 | assert(CAT && "String isn't pointer or array!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1542 | |
Chris Lattner | dbb1ecc | 2009-02-26 23:01:51 +0000 | [diff] [blame] | 1543 | // Resize the string to the right size. |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1544 | std::string Str(StrData, StrData+Len); |
| 1545 | uint64_t RealLen = CAT->getSize().getZExtValue(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1546 | |
Chris Lattner | dbb1ecc | 2009-02-26 23:01:51 +0000 | [diff] [blame] | 1547 | if (E->isWide()) |
| 1548 | RealLen *= getContext().Target.getWCharWidth()/8; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1549 | |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1550 | Str.resize(RealLen, '\0'); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1551 | |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1552 | return Str; |
| 1553 | } |
| 1554 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1555 | /// GetAddrOfConstantStringFromLiteral - Return a pointer to a |
| 1556 | /// constant array for the given string literal. |
| 1557 | llvm::Constant * |
| 1558 | CodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { |
| 1559 | // FIXME: This can be more efficient. |
Eli Friedman | 7eb79c1 | 2009-11-16 05:55:46 +0000 | [diff] [blame] | 1560 | // FIXME: We shouldn't need to bitcast the constant in the wide string case. |
| 1561 | llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); |
| 1562 | if (S->isWide()) { |
| 1563 | llvm::Type *DestTy = |
| 1564 | llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); |
| 1565 | C = llvm::ConstantExpr::getBitCast(C, DestTy); |
| 1566 | } |
| 1567 | return C; |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1568 | } |
| 1569 | |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1570 | /// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant |
| 1571 | /// array for the given ObjCEncodeExpr node. |
| 1572 | llvm::Constant * |
| 1573 | CodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { |
| 1574 | std::string Str; |
| 1575 | getContext().getObjCEncodingForType(E->getEncodedType(), Str); |
Eli Friedman | a210f35 | 2009-03-07 20:17:55 +0000 | [diff] [blame] | 1576 | |
| 1577 | return GetAddrOfConstantCString(Str); |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1578 | } |
| 1579 | |
| 1580 | |
Chris Lattner | a7ad98f | 2008-02-11 00:02:17 +0000 | [diff] [blame] | 1581 | /// GenerateWritableString -- Creates storage for a string literal. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1582 | static llvm::Constant *GenerateStringLiteral(const std::string &str, |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1583 | bool constant, |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1584 | CodeGenModule &CGM, |
| 1585 | const char *GlobalName) { |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1586 | // Create Constant for this string literal. Don't add a '\0'. |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1587 | llvm::Constant *C = |
| 1588 | llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1589 | |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1590 | // Create a global variable for this string |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1591 | return new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1592 | llvm::GlobalValue::PrivateLinkage, |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 1593 | C, GlobalName); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1594 | } |
| 1595 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1596 | /// GetAddrOfConstantString - Returns a pointer to a character array |
| 1597 | /// containing the literal. This contents are exactly that of the |
| 1598 | /// given string, i.e. it will not be null terminated automatically; |
| 1599 | /// see GetAddrOfConstantCString. Note that whether the result is |
| 1600 | /// actually a pointer to an LLVM constant depends on |
| 1601 | /// Feature.WriteableStrings. |
| 1602 | /// |
| 1603 | /// The result has pointer to array type. |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1604 | llvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, |
| 1605 | const char *GlobalName) { |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1606 | bool IsConstant = !Features.WritableStrings; |
| 1607 | |
| 1608 | // Get the default prefix if a name wasn't specified. |
| 1609 | if (!GlobalName) |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1610 | GlobalName = ".str"; |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1611 | |
| 1612 | // Don't share any string literals if strings aren't constant. |
| 1613 | if (!IsConstant) |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1614 | return GenerateStringLiteral(str, false, *this, GlobalName); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1615 | |
| 1616 | llvm::StringMapEntry<llvm::Constant *> &Entry = |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1617 | ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1618 | |
| 1619 | if (Entry.getValue()) |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1620 | return Entry.getValue(); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1621 | |
| 1622 | // Create a global variable for this. |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1623 | llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1624 | Entry.setValue(C); |
| 1625 | return C; |
| 1626 | } |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1627 | |
| 1628 | /// GetAddrOfConstantCString - Returns a pointer to a character |
| 1629 | /// array containing the literal and a terminating '\-' |
| 1630 | /// character. The result has pointer to array type. |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1631 | llvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, |
| 1632 | const char *GlobalName){ |
Chris Lattner | c9f29c6 | 2008-12-09 19:10:54 +0000 | [diff] [blame] | 1633 | return GetAddrOfConstantString(str + '\0', GlobalName); |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1634 | } |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1635 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1636 | /// EmitObjCPropertyImplementations - Emit information for synthesized |
| 1637 | /// properties for an implementation. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1638 | void CodeGenModule::EmitObjCPropertyImplementations(const |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1639 | ObjCImplementationDecl *D) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1640 | for (ObjCImplementationDecl::propimpl_iterator |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1641 | i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1642 | ObjCPropertyImplDecl *PID = *i; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1643 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1644 | // Dynamic is just for type-checking. |
| 1645 | if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { |
| 1646 | ObjCPropertyDecl *PD = PID->getPropertyDecl(); |
| 1647 | |
| 1648 | // Determine which methods need to be implemented, some may have |
| 1649 | // been overridden. Note that ::isSynthesized is not the method |
| 1650 | // we want, that just indicates if the decl came from a |
| 1651 | // property. What we want to know is if the method is defined in |
| 1652 | // this implementation. |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1653 | if (!D->getInstanceMethod(PD->getGetterName())) |
Fariborz Jahanian | fef30b5 | 2008-12-09 20:23:04 +0000 | [diff] [blame] | 1654 | CodeGenFunction(*this).GenerateObjCGetter( |
| 1655 | const_cast<ObjCImplementationDecl *>(D), PID); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1656 | if (!PD->isReadOnly() && |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1657 | !D->getInstanceMethod(PD->getSetterName())) |
Fariborz Jahanian | fef30b5 | 2008-12-09 20:23:04 +0000 | [diff] [blame] | 1658 | CodeGenFunction(*this).GenerateObjCSetter( |
| 1659 | const_cast<ObjCImplementationDecl *>(D), PID); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1660 | } |
| 1661 | } |
| 1662 | } |
| 1663 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1664 | /// EmitNamespace - Emit all declarations in a namespace. |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 1665 | void CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1666 | for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 1667 | I != E; ++I) |
| 1668 | EmitTopLevelDecl(*I); |
| 1669 | } |
| 1670 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1671 | // EmitLinkageSpec - Emit all declarations in a linkage spec. |
| 1672 | void CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { |
Eli Friedman | f976be8 | 2009-08-01 20:48:04 +0000 | [diff] [blame] | 1673 | if (LSD->getLanguage() != LinkageSpecDecl::lang_c && |
| 1674 | LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1675 | ErrorUnsupported(LSD, "linkage spec"); |
| 1676 | return; |
| 1677 | } |
| 1678 | |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1679 | for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1680 | I != E; ++I) |
| 1681 | EmitTopLevelDecl(*I); |
| 1682 | } |
| 1683 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1684 | /// EmitTopLevelDecl - Emit code for a single top level declaration. |
| 1685 | void CodeGenModule::EmitTopLevelDecl(Decl *D) { |
| 1686 | // If an error has occurred, stop code generation, but continue |
| 1687 | // parsing and semantic analysis (to ensure all warnings and errors |
| 1688 | // are emitted). |
| 1689 | if (Diags.hasErrorOccurred()) |
| 1690 | return; |
| 1691 | |
Douglas Gregor | 16e8be2 | 2009-06-29 17:30:29 +0000 | [diff] [blame] | 1692 | // Ignore dependent declarations. |
| 1693 | if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) |
| 1694 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1695 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1696 | switch (D->getKind()) { |
Anders Carlsson | 293361a | 2009-08-25 13:14:46 +0000 | [diff] [blame] | 1697 | case Decl::CXXConversion: |
Anders Carlsson | 2b77ba8 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 1698 | case Decl::CXXMethod: |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1699 | case Decl::Function: |
Douglas Gregor | 16e8be2 | 2009-06-29 17:30:29 +0000 | [diff] [blame] | 1700 | // Skip function templates |
| 1701 | if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) |
| 1702 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1703 | |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 1704 | EmitGlobal(cast<FunctionDecl>(D)); |
| 1705 | break; |
| 1706 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1707 | case Decl::Var: |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 1708 | EmitGlobal(cast<VarDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1709 | break; |
| 1710 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1711 | // C++ Decls |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1712 | case Decl::Namespace: |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 1713 | EmitNamespace(cast<NamespaceDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1714 | break; |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 1715 | // No code generation needed. |
John McCall | 9d0c661 | 2009-11-17 09:33:40 +0000 | [diff] [blame] | 1716 | case Decl::UsingShadow: |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 1717 | case Decl::Using: |
Douglas Gregor | dd9967a | 2009-09-02 23:49:23 +0000 | [diff] [blame] | 1718 | case Decl::UsingDirective: |
Douglas Gregor | 127102b | 2009-06-29 20:59:39 +0000 | [diff] [blame] | 1719 | case Decl::ClassTemplate: |
| 1720 | case Decl::FunctionTemplate: |
Anders Carlsson | 018837b | 2009-09-23 19:19:16 +0000 | [diff] [blame] | 1721 | case Decl::NamespaceAlias: |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 1722 | break; |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1723 | case Decl::CXXConstructor: |
Anders Carlsson | 1fe598c | 2009-11-24 05:16:24 +0000 | [diff] [blame] | 1724 | // Skip function templates |
| 1725 | if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) |
| 1726 | return; |
| 1727 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1728 | EmitCXXConstructors(cast<CXXConstructorDecl>(D)); |
| 1729 | break; |
Anders Carlsson | 27ae536 | 2009-04-17 01:58:57 +0000 | [diff] [blame] | 1730 | case Decl::CXXDestructor: |
| 1731 | EmitCXXDestructors(cast<CXXDestructorDecl>(D)); |
| 1732 | break; |
Anders Carlsson | 36674d2 | 2009-06-11 21:22:55 +0000 | [diff] [blame] | 1733 | |
| 1734 | case Decl::StaticAssert: |
| 1735 | // Nothing to do. |
| 1736 | break; |
| 1737 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1738 | // Objective-C Decls |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1739 | |
Fariborz Jahanian | 38e24c7 | 2009-03-18 22:33:24 +0000 | [diff] [blame] | 1740 | // Forward declarations, no (immediate) code generation. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1741 | case Decl::ObjCClass: |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1742 | case Decl::ObjCForwardProtocol: |
Fariborz Jahanian | b31cb7f | 2009-03-21 18:06:45 +0000 | [diff] [blame] | 1743 | case Decl::ObjCCategory: |
Chris Lattner | 285d0db | 2009-04-01 02:36:43 +0000 | [diff] [blame] | 1744 | case Decl::ObjCInterface: |
Chris Lattner | 285d0db | 2009-04-01 02:36:43 +0000 | [diff] [blame] | 1745 | break; |
| 1746 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1747 | case Decl::ObjCProtocol: |
Fariborz Jahanian | b31cb7f | 2009-03-21 18:06:45 +0000 | [diff] [blame] | 1748 | Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1749 | break; |
| 1750 | |
| 1751 | case Decl::ObjCCategoryImpl: |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1752 | // Categories have properties but don't support synthesize so we |
| 1753 | // can ignore them here. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1754 | Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); |
| 1755 | break; |
| 1756 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1757 | case Decl::ObjCImplementation: { |
| 1758 | ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); |
| 1759 | EmitObjCPropertyImplementations(OMD); |
| 1760 | Runtime->GenerateClass(OMD); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1761 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1762 | } |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1763 | case Decl::ObjCMethod: { |
| 1764 | ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); |
| 1765 | // If this is not a prototype, emit the body. |
Argyrios Kyrtzidis | 6fb0aee | 2009-06-30 02:35:26 +0000 | [diff] [blame] | 1766 | if (OMD->getBody()) |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1767 | CodeGenFunction(*this).GenerateObjCMethod(OMD); |
| 1768 | break; |
| 1769 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1770 | case Decl::ObjCCompatibleAlias: |
Fariborz Jahanian | 305c658 | 2009-01-08 01:10:55 +0000 | [diff] [blame] | 1771 | // compatibility-alias is a directive and has no code gen. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1772 | break; |
| 1773 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1774 | case Decl::LinkageSpec: |
| 1775 | EmitLinkageSpec(cast<LinkageSpecDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1776 | break; |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1777 | |
| 1778 | case Decl::FileScopeAsm: { |
| 1779 | FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); |
Benjamin Kramer | 8d04258 | 2009-12-11 13:33:18 +0000 | [diff] [blame] | 1780 | llvm::StringRef AsmString = AD->getAsmString()->getString(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1781 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1782 | const std::string &S = getModule().getModuleInlineAsm(); |
| 1783 | if (S.empty()) |
| 1784 | getModule().setModuleInlineAsm(AsmString); |
| 1785 | else |
Benjamin Kramer | 8d04258 | 2009-12-11 13:33:18 +0000 | [diff] [blame] | 1786 | getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1787 | break; |
| 1788 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1789 | |
| 1790 | default: |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 1791 | // Make sure we handled everything we should, every other kind is a |
| 1792 | // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind |
| 1793 | // function. Need to recode Decl::Kind to do that easily. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1794 | assert(isa<TypeDecl>(D) && "Unsupported decl kind"); |
| 1795 | } |
| 1796 | } |