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" |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 20 | #include "clang/CodeGen/CodeGenOptions.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 21 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 22 | #include "clang/AST/DeclObjC.h" |
Chris Lattner | 21ef7ae | 2008-11-04 16:51:42 +0000 | [diff] [blame] | 23 | #include "clang/AST/DeclCXX.h" |
Chris Lattner | 1b63e4f | 2009-06-14 01:54:56 +0000 | [diff] [blame] | 24 | #include "clang/Basic/Builtins.h" |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 25 | #include "clang/Basic/Diagnostic.h" |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 26 | #include "clang/Basic/SourceManager.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 27 | #include "clang/Basic/TargetInfo.h" |
Steve Naroff | e9b7d8a | 2009-04-01 15:50:34 +0000 | [diff] [blame] | 28 | #include "clang/Basic/ConvertUTF.h" |
Nate Begeman | ec9426c | 2008-03-09 03:09:36 +0000 | [diff] [blame] | 29 | #include "llvm/CallingConv.h" |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 30 | #include "llvm/Module.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 31 | #include "llvm/Intrinsics.h" |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 32 | #include "llvm/Target/TargetData.h" |
Chris Lattner | 78f7ece | 2009-11-07 09:22:46 +0000 | [diff] [blame] | 33 | #include "llvm/Support/ErrorHandling.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 34 | using namespace clang; |
| 35 | using namespace CodeGen; |
| 36 | |
| 37 | |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 38 | CodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, |
Chris Lattner | fb97b03 | 2007-12-02 01:40:18 +0000 | [diff] [blame] | 39 | llvm::Module &M, const llvm::TargetData &TD, |
Chris Lattner | bd36064 | 2009-03-26 05:00:52 +0000 | [diff] [blame] | 40 | Diagnostic &diags) |
| 41 | : BlockModule(C, M, TD, Types, *this), Context(C), |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 42 | Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), |
Anders Carlsson | dbd920c | 2009-10-11 22:13:54 +0000 | [diff] [blame] | 43 | TheTargetData(TD), Diags(diags), Types(C, M, TD), MangleCtx(C), |
| 44 | VtableInfo(*this), Runtime(0), |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 45 | MemCpyFn(0), MemMoveFn(0), MemSetFn(0), CFConstantStringClassRef(0), |
| 46 | VMContext(M.getContext()) { |
Daniel Dunbar | 208ff5e | 2008-08-11 18:12:00 +0000 | [diff] [blame] | 47 | |
Chris Lattner | 3c8f153 | 2009-03-21 07:12:05 +0000 | [diff] [blame] | 48 | if (!Features.ObjC1) |
| 49 | Runtime = 0; |
| 50 | else if (!Features.NeXTRuntime) |
| 51 | Runtime = CreateGNUObjCRuntime(*this); |
| 52 | else if (Features.ObjCNonFragileABI) |
| 53 | Runtime = CreateMacNonFragileABIObjCRuntime(*this); |
| 54 | else |
| 55 | Runtime = CreateMacObjCRuntime(*this); |
Sanjiv Gupta | e8b9f5b | 2008-05-08 08:54:20 +0000 | [diff] [blame] | 56 | |
| 57 | // If debug info generation is enabled, create the CGDebugInfo object. |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 58 | DebugInfo = CodeGenOpts.DebugInfo ? new CGDebugInfo(this) : 0; |
Chris Lattner | 2b94fe3 | 2008-03-01 08:45:05 +0000 | [diff] [blame] | 59 | } |
| 60 | |
| 61 | CodeGenModule::~CodeGenModule() { |
Ted Kremenek | 815c78f | 2008-08-05 18:50:11 +0000 | [diff] [blame] | 62 | delete Runtime; |
| 63 | delete DebugInfo; |
| 64 | } |
| 65 | |
| 66 | void CodeGenModule::Release() { |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 67 | // We need to call this first because it can add deferred declarations. |
| 68 | EmitCXXGlobalInitFunc(); |
| 69 | |
Chris Lattner | 82227ff | 2009-03-22 21:21:57 +0000 | [diff] [blame] | 70 | EmitDeferred(); |
Daniel Dunbar | 208ff5e | 2008-08-11 18:12:00 +0000 | [diff] [blame] | 71 | if (Runtime) |
| 72 | if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) |
| 73 | AddGlobalCtor(ObjCInitFunction); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 74 | EmitCtorList(GlobalCtors, "llvm.global_ctors"); |
| 75 | EmitCtorList(GlobalDtors, "llvm.global_dtors"); |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 76 | EmitAnnotations(); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 77 | EmitLLVMUsed(); |
Daniel Dunbar | f1968f2 | 2008-10-01 00:49:24 +0000 | [diff] [blame] | 78 | } |
| 79 | |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 80 | /// ErrorUnsupported - Print out an error that codegen doesn't support the |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 81 | /// specified stmt yet. |
Daniel Dunbar | 90df4b6 | 2008-09-04 03:43:08 +0000 | [diff] [blame] | 82 | void CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, |
| 83 | bool OmitOnError) { |
| 84 | if (OmitOnError && getDiags().hasErrorOccurred()) |
| 85 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 86 | unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, |
Daniel Dunbar | 56b8001 | 2009-02-06 19:18:03 +0000 | [diff] [blame] | 87 | "cannot compile this %0 yet"); |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 88 | std::string Msg = Type; |
Chris Lattner | 0a14eee | 2008-11-18 07:04:44 +0000 | [diff] [blame] | 89 | getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) |
| 90 | << Msg << S->getSourceRange(); |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 91 | } |
Chris Lattner | 58c3f9e | 2007-12-02 06:27:33 +0000 | [diff] [blame] | 92 | |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 93 | /// ErrorUnsupported - Print out an error that codegen doesn't support the |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 94 | /// specified decl yet. |
Daniel Dunbar | 90df4b6 | 2008-09-04 03:43:08 +0000 | [diff] [blame] | 95 | void CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, |
| 96 | bool OmitOnError) { |
| 97 | if (OmitOnError && getDiags().hasErrorOccurred()) |
| 98 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 99 | unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, |
Daniel Dunbar | 56b8001 | 2009-02-06 19:18:03 +0000 | [diff] [blame] | 100 | "cannot compile this %0 yet"); |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 101 | std::string Msg = Type; |
Chris Lattner | 0a14eee | 2008-11-18 07:04:44 +0000 | [diff] [blame] | 102 | getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 103 | } |
| 104 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 105 | LangOptions::VisibilityMode |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 106 | CodeGenModule::getDeclVisibilityMode(const Decl *D) const { |
| 107 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) |
| 108 | if (VD->getStorageClass() == VarDecl::PrivateExtern) |
| 109 | return LangOptions::Hidden; |
| 110 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 111 | if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) { |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 112 | switch (attr->getVisibility()) { |
| 113 | default: assert(0 && "Unknown visibility!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 114 | case VisibilityAttr::DefaultVisibility: |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 115 | return LangOptions::Default; |
| 116 | case VisibilityAttr::HiddenVisibility: |
| 117 | return LangOptions::Hidden; |
| 118 | case VisibilityAttr::ProtectedVisibility: |
| 119 | return LangOptions::Protected; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | return getLangOptions().getVisibilityMode(); |
| 124 | } |
| 125 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 126 | void CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 127 | const Decl *D) const { |
| 128 | // Internal definitions always have default visibility. |
Chris Lattner | df102fc | 2009-04-14 05:27:13 +0000 | [diff] [blame] | 129 | if (GV->hasLocalLinkage()) { |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 130 | GV->setVisibility(llvm::GlobalValue::DefaultVisibility); |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 131 | return; |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 132 | } |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 133 | |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 134 | switch (getDeclVisibilityMode(D)) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 135 | default: assert(0 && "Unknown visibility!"); |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 136 | case LangOptions::Default: |
| 137 | return GV->setVisibility(llvm::GlobalValue::DefaultVisibility); |
| 138 | case LangOptions::Hidden: |
| 139 | return GV->setVisibility(llvm::GlobalValue::HiddenVisibility); |
| 140 | case LangOptions::Protected: |
| 141 | return GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 142 | } |
| 143 | } |
| 144 | |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 145 | const char *CodeGenModule::getMangledName(const GlobalDecl &GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 146 | const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 147 | |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 148 | if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) |
| 149 | return getMangledCXXCtorName(D, GD.getCtorType()); |
| 150 | if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) |
| 151 | return getMangledCXXDtorName(D, GD.getDtorType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 152 | |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 153 | return getMangledName(ND); |
| 154 | } |
| 155 | |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 156 | /// \brief Retrieves the mangled name for the given declaration. |
| 157 | /// |
| 158 | /// If the given declaration requires a mangled name, returns an |
Chris Lattner | c50689b | 2009-03-21 06:31:09 +0000 | [diff] [blame] | 159 | /// const char* containing the mangled name. Otherwise, returns |
| 160 | /// the unmangled name. |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 161 | /// |
Douglas Gregor | 6ec3668 | 2009-02-18 23:53:56 +0000 | [diff] [blame] | 162 | const char *CodeGenModule::getMangledName(const NamedDecl *ND) { |
Chris Lattner | c50689b | 2009-03-21 06:31:09 +0000 | [diff] [blame] | 163 | // In C, functions with no attributes never need to be mangled. Fastpath them. |
| 164 | if (!getLangOptions().CPlusPlus && !ND->hasAttrs()) { |
| 165 | assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); |
Chris Lattner | 3c8f153 | 2009-03-21 07:12:05 +0000 | [diff] [blame] | 166 | return ND->getNameAsCString(); |
Chris Lattner | c50689b | 2009-03-21 06:31:09 +0000 | [diff] [blame] | 167 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 168 | |
Douglas Gregor | 6ec3668 | 2009-02-18 23:53:56 +0000 | [diff] [blame] | 169 | llvm::SmallString<256> Name; |
| 170 | llvm::raw_svector_ostream Out(Name); |
Anders Carlsson | b540491 | 2009-10-07 01:06:45 +0000 | [diff] [blame] | 171 | if (!mangleName(getMangleContext(), ND, Out)) { |
Daniel Dunbar | fe34557 | 2009-03-05 22:59:19 +0000 | [diff] [blame] | 172 | assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); |
Chris Lattner | 3c8f153 | 2009-03-21 07:12:05 +0000 | [diff] [blame] | 173 | return ND->getNameAsCString(); |
Daniel Dunbar | fe34557 | 2009-03-05 22:59:19 +0000 | [diff] [blame] | 174 | } |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 175 | |
Douglas Gregor | 6ec3668 | 2009-02-18 23:53:56 +0000 | [diff] [blame] | 176 | Name += '\0'; |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 177 | return UniqueMangledName(Name.begin(), Name.end()); |
| 178 | } |
| 179 | |
| 180 | const char *CodeGenModule::UniqueMangledName(const char *NameStart, |
| 181 | const char *NameEnd) { |
| 182 | assert(*(NameEnd - 1) == '\0' && "Mangled name must be null terminated!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 183 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 184 | return MangledNames.GetOrCreateValue(NameStart, NameEnd).getKeyData(); |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 185 | } |
| 186 | |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 187 | /// AddGlobalCtor - Add a function to the list that will be called before |
| 188 | /// main() runs. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 189 | void CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 190 | // FIXME: Type coercion of void()* types. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 191 | GlobalCtors.push_back(std::make_pair(Ctor, Priority)); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 192 | } |
| 193 | |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 194 | /// AddGlobalDtor - Add a function to the list that will be called |
| 195 | /// when the module is unloaded. |
| 196 | void CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 197 | // FIXME: Type coercion of void()* types. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 198 | GlobalDtors.push_back(std::make_pair(Dtor, Priority)); |
| 199 | } |
| 200 | |
| 201 | void CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { |
| 202 | // Ctor function type is void()*. |
| 203 | llvm::FunctionType* CtorFTy = |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 204 | llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 205 | std::vector<const llvm::Type*>(), |
| 206 | false); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 207 | llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 208 | |
| 209 | // Get the type of a ctor entry, { i32, void ()* }. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 210 | llvm::StructType* CtorStructTy = |
| 211 | llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 212 | llvm::PointerType::getUnqual(CtorFTy), NULL); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 213 | |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 214 | // Construct the constructor and destructor arrays. |
| 215 | std::vector<llvm::Constant*> Ctors; |
| 216 | for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { |
| 217 | std::vector<llvm::Constant*> S; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 218 | S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 219 | I->second, false)); |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 220 | S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); |
Owen Anderson | 08e2524 | 2009-07-27 22:29:56 +0000 | [diff] [blame] | 221 | Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 222 | } |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 223 | |
| 224 | if (!Ctors.empty()) { |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 225 | llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 226 | new llvm::GlobalVariable(TheModule, AT, false, |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 227 | llvm::GlobalValue::AppendingLinkage, |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 228 | llvm::ConstantArray::get(AT, Ctors), |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 229 | GlobalName); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 230 | } |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 231 | } |
| 232 | |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 233 | void CodeGenModule::EmitAnnotations() { |
| 234 | if (Annotations.empty()) |
| 235 | return; |
| 236 | |
| 237 | // Create a new global variable for the ConstantStruct in the Module. |
| 238 | llvm::Constant *Array = |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 239 | llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 240 | Annotations.size()), |
| 241 | Annotations); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 242 | llvm::GlobalValue *gv = |
| 243 | new llvm::GlobalVariable(TheModule, Array->getType(), false, |
| 244 | llvm::GlobalValue::AppendingLinkage, Array, |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 245 | "llvm.global.annotations"); |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 246 | gv->setSection("llvm.metadata"); |
| 247 | } |
| 248 | |
Chris Lattner | 86daeee | 2009-04-14 16:44:36 +0000 | [diff] [blame] | 249 | static CodeGenModule::GVALinkage |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 250 | GetLinkageForFunction(ASTContext &Context, const FunctionDecl *FD, |
Douglas Gregor | 68584ed | 2009-06-18 16:11:24 +0000 | [diff] [blame] | 251 | const LangOptions &Features) { |
John McCall | 9aeed32 | 2009-10-01 00:25:31 +0000 | [diff] [blame] | 252 | // Everything located semantically within an anonymous namespace is |
| 253 | // always internal. |
| 254 | if (FD->isInAnonymousNamespace()) |
| 255 | return CodeGenModule::GVA_Internal; |
| 256 | |
Douglas Gregor | 7d9c3c9 | 2009-10-27 23:26:40 +0000 | [diff] [blame] | 257 | // "static" functions get internal linkage. |
| 258 | if (FD->getStorageClass() == FunctionDecl::Static && !isa<CXXMethodDecl>(FD)) |
| 259 | return CodeGenModule::GVA_Internal; |
| 260 | |
Douglas Gregor | 1fd2dd1 | 2009-06-29 22:39:32 +0000 | [diff] [blame] | 261 | // The kind of external linkage this function will have, if it is not |
| 262 | // inline or static. |
| 263 | CodeGenModule::GVALinkage External = CodeGenModule::GVA_StrongExternal; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 264 | if (Context.getLangOptions().CPlusPlus && |
Douglas Gregor | d0e3daf | 2009-09-04 22:48:11 +0000 | [diff] [blame] | 265 | FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) |
Douglas Gregor | 1fd2dd1 | 2009-06-29 22:39:32 +0000 | [diff] [blame] | 266 | External = CodeGenModule::GVA_TemplateInstantiation; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 267 | |
Douglas Gregor | 7ced9c8 | 2009-10-27 21:11:48 +0000 | [diff] [blame] | 268 | if (!FD->isInlined()) |
Douglas Gregor | 1fd2dd1 | 2009-06-29 22:39:32 +0000 | [diff] [blame] | 269 | return External; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 270 | |
Douglas Gregor | 1fc09a9 | 2009-09-13 07:46:26 +0000 | [diff] [blame] | 271 | if (!Features.CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { |
| 272 | // GNU or C99 inline semantics. Determine whether this symbol should be |
| 273 | // externally visible. |
| 274 | if (FD->isInlineDefinitionExternallyVisible()) |
| 275 | return External; |
| 276 | |
| 277 | // C99 inline semantics, where the symbol is not externally visible. |
| 278 | return CodeGenModule::GVA_C99Inline; |
Chris Lattner | d55a71d | 2009-04-22 00:03:30 +0000 | [diff] [blame] | 279 | } |
Chris Lattner | cbb8fc1 | 2009-04-14 20:25:53 +0000 | [diff] [blame] | 280 | |
Douglas Gregor | 7d9c3c9 | 2009-10-27 23:26:40 +0000 | [diff] [blame] | 281 | // C++0x [temp.explicit]p9: |
| 282 | // [ Note: The intent is that an inline function that is the subject of |
| 283 | // an explicit instantiation declaration will still be implicitly |
| 284 | // instantiated when used so that the body can be considered for |
| 285 | // inlining, but that no out-of-line copy of the inline function would be |
| 286 | // generated in the translation unit. -- end note ] |
| 287 | if (FD->getTemplateSpecializationKind() |
| 288 | == TSK_ExplicitInstantiationDeclaration) |
| 289 | return CodeGenModule::GVA_C99Inline; |
| 290 | |
Douglas Gregor | 1fc09a9 | 2009-09-13 07:46:26 +0000 | [diff] [blame] | 291 | return CodeGenModule::GVA_CXXInline; |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | /// SetFunctionDefinitionAttributes - Set attributes for a global. |
Daniel Dunbar | b97b692 | 2009-04-14 06:19:49 +0000 | [diff] [blame] | 295 | /// |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 296 | /// FIXME: This is currently only done for aliases and functions, but not for |
| 297 | /// variables (these details are set in EmitGlobalVarDefinition for variables). |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 298 | void CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, |
| 299 | llvm::GlobalValue *GV) { |
Douglas Gregor | 68584ed | 2009-06-18 16:11:24 +0000 | [diff] [blame] | 300 | GVALinkage Linkage = GetLinkageForFunction(getContext(), D, Features); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 301 | |
Daniel Dunbar | 55d6f50 | 2009-04-14 07:19:20 +0000 | [diff] [blame] | 302 | if (Linkage == GVA_Internal) { |
Chris Lattner | 9f94279 | 2009-04-14 05:33:52 +0000 | [diff] [blame] | 303 | GV->setLinkage(llvm::Function::InternalLinkage); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 304 | } else if (D->hasAttr<DLLExportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 305 | GV->setLinkage(llvm::Function::DLLExportLinkage); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 306 | } else if (D->hasAttr<WeakAttr>()) { |
Chris Lattner | 44b0bc0 | 2009-04-14 06:04:17 +0000 | [diff] [blame] | 307 | GV->setLinkage(llvm::Function::WeakAnyLinkage); |
Chris Lattner | cbb8fc1 | 2009-04-14 20:25:53 +0000 | [diff] [blame] | 308 | } else if (Linkage == GVA_C99Inline) { |
| 309 | // In C99 mode, 'inline' functions are guaranteed to have a strong |
| 310 | // definition somewhere else, so we can use available_externally linkage. |
Chris Lattner | d9d049a | 2009-04-14 06:27:57 +0000 | [diff] [blame] | 311 | GV->setLinkage(llvm::Function::AvailableExternallyLinkage); |
Douglas Gregor | 1fd2dd1 | 2009-06-29 22:39:32 +0000 | [diff] [blame] | 312 | } else if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) { |
Chris Lattner | 86daeee | 2009-04-14 16:44:36 +0000 | [diff] [blame] | 313 | // In C++, the compiler has to emit a definition in every translation unit |
| 314 | // that references the function. We should use linkonce_odr because |
| 315 | // a) if all references in this translation unit are optimized away, we |
| 316 | // don't need to codegen it. b) if the function persists, it needs to be |
| 317 | // merged with other definitions. c) C++ has the ODR, so we know the |
| 318 | // definition is dependable. |
| 319 | GV->setLinkage(llvm::Function::LinkOnceODRLinkage); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 320 | } else { |
Chris Lattner | cbb8fc1 | 2009-04-14 20:25:53 +0000 | [diff] [blame] | 321 | assert(Linkage == GVA_StrongExternal); |
| 322 | // Otherwise, we have strong external linkage. |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 323 | GV->setLinkage(llvm::Function::ExternalLinkage); |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 324 | } |
Nuno Lopes | d4cbda6 | 2008-06-08 15:45:52 +0000 | [diff] [blame] | 325 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 326 | SetCommonAttributes(D, GV); |
Nuno Lopes | d4cbda6 | 2008-06-08 15:45:52 +0000 | [diff] [blame] | 327 | } |
| 328 | |
Daniel Dunbar | 7dbd819 | 2009-04-14 07:08:30 +0000 | [diff] [blame] | 329 | void CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 330 | const CGFunctionInfo &Info, |
Daniel Dunbar | 7dbd819 | 2009-04-14 07:08:30 +0000 | [diff] [blame] | 331 | llvm::Function *F) { |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 332 | unsigned CallingConv; |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 333 | AttributeListType AttributeList; |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 334 | ConstructAttributeList(Info, D, AttributeList, CallingConv); |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 335 | F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 336 | AttributeList.size())); |
| 337 | F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 338 | } |
| 339 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 340 | void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, |
| 341 | llvm::Function *F) { |
Daniel Dunbar | 74ac74a | 2009-03-02 04:58:03 +0000 | [diff] [blame] | 342 | if (!Features.Exceptions && !Features.ObjCNonFragileABI) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 343 | F->addFnAttr(llvm::Attribute::NoUnwind); |
Daniel Dunbar | af668b0 | 2008-10-28 00:17:57 +0000 | [diff] [blame] | 344 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 345 | if (D->hasAttr<AlwaysInlineAttr>()) |
Daniel Dunbar | af668b0 | 2008-10-28 00:17:57 +0000 | [diff] [blame] | 346 | F->addFnAttr(llvm::Attribute::AlwaysInline); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 347 | |
Mike Stump | 1feade8 | 2009-08-26 22:31:08 +0000 | [diff] [blame] | 348 | if (D->hasAttr<NoInlineAttr>()) |
Anders Carlsson | 81ebbde | 2009-02-19 19:22:11 +0000 | [diff] [blame] | 349 | F->addFnAttr(llvm::Attribute::NoInline); |
Mike Stump | f55314d | 2009-10-05 21:58:44 +0000 | [diff] [blame] | 350 | |
Anders Carlsson | fd01535 | 2009-11-16 16:56:03 +0000 | [diff] [blame] | 351 | if (Features.getStackProtectorMode() == LangOptions::SSPOn) |
| 352 | F->addFnAttr(llvm::Attribute::StackProtect); |
| 353 | else if (Features.getStackProtectorMode() == LangOptions::SSPReq) |
| 354 | F->addFnAttr(llvm::Attribute::StackProtectReq); |
| 355 | |
Mike Stump | f55314d | 2009-10-05 21:58:44 +0000 | [diff] [blame] | 356 | if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) |
| 357 | F->setAlignment(AA->getAlignment()/8); |
Mike Stump | fb51ddf | 2009-10-05 22:49:20 +0000 | [diff] [blame] | 358 | // C++ ABI requires 2-byte alignment for member functions. |
Mike Stump | bd6dbd1 | 2009-10-05 23:08:21 +0000 | [diff] [blame] | 359 | if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) |
| 360 | F->setAlignment(2); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 361 | } |
| 362 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 363 | void CodeGenModule::SetCommonAttributes(const Decl *D, |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 364 | llvm::GlobalValue *GV) { |
| 365 | setGlobalVisibility(GV, D); |
| 366 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 367 | if (D->hasAttr<UsedAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 368 | AddUsedGlobal(GV); |
| 369 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 370 | if (const SectionAttr *SA = D->getAttr<SectionAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 371 | GV->setSection(SA->getName()); |
| 372 | } |
| 373 | |
Daniel Dunbar | 0e4f40e | 2009-04-17 00:48:04 +0000 | [diff] [blame] | 374 | void CodeGenModule::SetInternalFunctionAttributes(const Decl *D, |
| 375 | llvm::Function *F, |
| 376 | const CGFunctionInfo &FI) { |
| 377 | SetLLVMFunctionAttributes(D, FI, F); |
| 378 | SetLLVMFunctionAttributesForDefinition(D, F); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 379 | |
| 380 | F->setLinkage(llvm::Function::InternalLinkage); |
| 381 | |
Daniel Dunbar | 0e4f40e | 2009-04-17 00:48:04 +0000 | [diff] [blame] | 382 | SetCommonAttributes(D, F); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 383 | } |
| 384 | |
| 385 | void CodeGenModule::SetFunctionAttributes(const FunctionDecl *FD, |
Eli Friedman | c6c14d1 | 2009-05-26 01:22:57 +0000 | [diff] [blame] | 386 | llvm::Function *F, |
| 387 | bool IsIncompleteFunction) { |
| 388 | if (!IsIncompleteFunction) |
| 389 | SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(FD), F); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 390 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 391 | // Only a few attributes are set on declarations; these may later be |
| 392 | // overridden by a definition. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 393 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 394 | if (FD->hasAttr<DLLImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 395 | F->setLinkage(llvm::Function::DLLImportLinkage); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 396 | } else if (FD->hasAttr<WeakAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 397 | FD->hasAttr<WeakImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 398 | // "extern_weak" is overloaded in LLVM; we probably should have |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 399 | // separate linkage types for this. |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 400 | F->setLinkage(llvm::Function::ExternalWeakLinkage); |
| 401 | } else { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 402 | F->setLinkage(llvm::Function::ExternalLinkage); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 403 | } |
| 404 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 405 | if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 406 | F->setSection(SA->getName()); |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 407 | } |
| 408 | |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 409 | void CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 410 | assert(!GV->isDeclaration() && |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 411 | "Only globals with definition can force usage."); |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 412 | LLVMUsed.push_back(GV); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | void CodeGenModule::EmitLLVMUsed() { |
| 416 | // Don't create llvm.used if there is no need. |
Chris Lattner | ad64e02 | 2009-07-17 23:57:13 +0000 | [diff] [blame] | 417 | if (LLVMUsed.empty()) |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 418 | return; |
| 419 | |
Benjamin Kramer | 3c0ef8c | 2009-10-13 10:07:13 +0000 | [diff] [blame] | 420 | const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 421 | |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 422 | // Convert LLVMUsed to what ConstantArray needs. |
| 423 | std::vector<llvm::Constant*> UsedArray; |
| 424 | UsedArray.resize(LLVMUsed.size()); |
| 425 | for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 426 | UsedArray[i] = |
| 427 | llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 428 | i8PTy); |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 429 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 430 | |
Fariborz Jahanian | c38e9af | 2009-06-23 21:47:46 +0000 | [diff] [blame] | 431 | if (UsedArray.empty()) |
| 432 | return; |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 433 | llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 434 | |
| 435 | llvm::GlobalVariable *GV = |
| 436 | new llvm::GlobalVariable(getModule(), ATy, false, |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 437 | llvm::GlobalValue::AppendingLinkage, |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 438 | llvm::ConstantArray::get(ATy, UsedArray), |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 439 | "llvm.used"); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 440 | |
| 441 | GV->setSection("llvm.metadata"); |
| 442 | } |
| 443 | |
| 444 | void CodeGenModule::EmitDeferred() { |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 445 | // Emit code for any potentially referenced deferred decls. Since a |
| 446 | // previously unused static decl may become used during the generation of code |
| 447 | // for a static function, iterate until no changes are made. |
| 448 | while (!DeferredDeclsToEmit.empty()) { |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 449 | GlobalDecl D = DeferredDeclsToEmit.back(); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 450 | DeferredDeclsToEmit.pop_back(); |
| 451 | |
| 452 | // The mangled name for the decl must have been emitted in GlobalDeclMap. |
| 453 | // Look it up to see if it was defined with a stronger definition (e.g. an |
| 454 | // extern inline function with a strong function redefinition). If so, |
| 455 | // just ignore the deferred decl. |
| 456 | llvm::GlobalValue *CGRef = GlobalDeclMap[getMangledName(D)]; |
| 457 | assert(CGRef && "Deferred decl wasn't referenced?"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 458 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 459 | if (!CGRef->isDeclaration()) |
| 460 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 461 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 462 | // Otherwise, emit the definition and move on to the next one. |
| 463 | EmitGlobalDefinition(D); |
| 464 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 465 | } |
| 466 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 467 | /// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 468 | /// annotation information for a given GlobalValue. The annotation struct is |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 469 | /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the |
| 470 | /// GlobalValue being annotated. The second field is the constant string |
| 471 | /// created from the AnnotateAttr's annotation. The third field is a constant |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 472 | /// string containing the name of the translation unit. The fourth field is |
| 473 | /// the line number in the file of the annotated value declaration. |
| 474 | /// |
| 475 | /// FIXME: this does not unique the annotation string constants, as llvm-gcc |
| 476 | /// appears to. |
| 477 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 478 | llvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 479 | const AnnotateAttr *AA, |
| 480 | unsigned LineNo) { |
| 481 | llvm::Module *M = &getModule(); |
| 482 | |
| 483 | // get [N x i8] constants for the annotation string, and the filename string |
| 484 | // which are the 2nd and 3rd elements of the global annotation structure. |
Benjamin Kramer | 3c0ef8c | 2009-10-13 10:07:13 +0000 | [diff] [blame] | 485 | const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 486 | llvm::Constant *anno = llvm::ConstantArray::get(VMContext, |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 487 | AA->getAnnotation(), true); |
| 488 | llvm::Constant *unit = llvm::ConstantArray::get(VMContext, |
| 489 | M->getModuleIdentifier(), |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 490 | true); |
| 491 | |
| 492 | // Get the two global values corresponding to the ConstantArrays we just |
| 493 | // created to hold the bytes of the strings. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 494 | llvm::GlobalValue *annoGV = |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 495 | new llvm::GlobalVariable(*M, anno->getType(), false, |
| 496 | llvm::GlobalValue::PrivateLinkage, anno, |
| 497 | GV->getName()); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 498 | // translation unit name string, emitted into the llvm.metadata section. |
| 499 | llvm::GlobalValue *unitGV = |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 500 | new llvm::GlobalVariable(*M, unit->getType(), false, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 501 | llvm::GlobalValue::PrivateLinkage, unit, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 502 | ".str"); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 503 | |
Daniel Dunbar | 57d5cee | 2009-04-14 22:41:13 +0000 | [diff] [blame] | 504 | // Create the ConstantStruct for the global annotation. |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 505 | llvm::Constant *Fields[4] = { |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 506 | llvm::ConstantExpr::getBitCast(GV, SBP), |
| 507 | llvm::ConstantExpr::getBitCast(annoGV, SBP), |
| 508 | llvm::ConstantExpr::getBitCast(unitGV, SBP), |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 509 | llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 510 | }; |
Owen Anderson | 47a434f | 2009-08-05 23:18:46 +0000 | [diff] [blame] | 511 | return llvm::ConstantStruct::get(VMContext, Fields, 4, false); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 512 | } |
| 513 | |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 514 | bool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { |
Daniel Dunbar | 5c61d97 | 2009-02-13 22:08:43 +0000 | [diff] [blame] | 515 | // Never defer when EmitAllDecls is specified or the decl has |
| 516 | // attribute used. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 517 | if (Features.EmitAllDecls || Global->hasAttr<UsedAttr>()) |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 518 | return false; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 519 | |
| 520 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 521 | // Constructors and destructors should never be deferred. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 522 | if (FD->hasAttr<ConstructorAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 523 | FD->hasAttr<DestructorAttr>()) |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 524 | return false; |
| 525 | |
Douglas Gregor | 68584ed | 2009-06-18 16:11:24 +0000 | [diff] [blame] | 526 | GVALinkage Linkage = GetLinkageForFunction(getContext(), FD, Features); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 527 | |
Chris Lattner | dbb5a37 | 2009-04-14 06:44:48 +0000 | [diff] [blame] | 528 | // static, static inline, always_inline, and extern inline functions can |
Chris Lattner | 86daeee | 2009-04-14 16:44:36 +0000 | [diff] [blame] | 529 | // always be deferred. Normal inline functions can be deferred in C99/C++. |
Chris Lattner | cbb8fc1 | 2009-04-14 20:25:53 +0000 | [diff] [blame] | 530 | if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || |
| 531 | Linkage == GVA_CXXInline) |
Chris Lattner | dbb5a37 | 2009-04-14 06:44:48 +0000 | [diff] [blame] | 532 | return true; |
Chris Lattner | dbb5a37 | 2009-04-14 06:44:48 +0000 | [diff] [blame] | 533 | return false; |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 534 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 535 | |
Chris Lattner | dbb5a37 | 2009-04-14 06:44:48 +0000 | [diff] [blame] | 536 | const VarDecl *VD = cast<VarDecl>(Global); |
| 537 | assert(VD->isFileVarDecl() && "Invalid decl"); |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 538 | |
Anders Carlsson | 74d644a | 2009-10-08 17:28:59 +0000 | [diff] [blame] | 539 | // We never want to defer structs that have non-trivial constructors or |
| 540 | // destructors. |
| 541 | |
| 542 | // FIXME: Handle references. |
| 543 | if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { |
| 544 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { |
| 545 | if (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor()) |
| 546 | return false; |
| 547 | } |
| 548 | } |
| 549 | |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 550 | // Static data may be deferred, but out-of-line static data members |
| 551 | // cannot be. |
Fariborz Jahanian | 393c247 | 2009-11-05 18:03:03 +0000 | [diff] [blame] | 552 | if (VD->isInAnonymousNamespace()) |
| 553 | return true; |
| 554 | if (VD->getStorageClass() == VarDecl::Static) { |
| 555 | // Initializer has side effects? |
| 556 | if (VD->getInit() && VD->getInit()->HasSideEffects(Context)) |
| 557 | return false; |
| 558 | return !(VD->isStaticDataMember() && VD->isOutOfLine()); |
| 559 | } |
| 560 | return false; |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 561 | } |
| 562 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 563 | void CodeGenModule::EmitGlobal(GlobalDecl GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 564 | const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 565 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 566 | // If this is an alias definition (which otherwise looks like a declaration) |
| 567 | // emit it now. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 568 | if (Global->hasAttr<AliasAttr>()) |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 569 | return EmitAliasDefinition(Global); |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 570 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 571 | // Ignore declarations, they will be emitted on their first use. |
Daniel Dunbar | 5e1e1f9 | 2009-03-19 08:27:24 +0000 | [diff] [blame] | 572 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 573 | // Forward declarations are emitted lazily on first use. |
| 574 | if (!FD->isThisDeclarationADefinition()) |
| 575 | return; |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 576 | } else { |
| 577 | const VarDecl *VD = cast<VarDecl>(Global); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 578 | assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); |
| 579 | |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 580 | // In C++, if this is marked "extern", defer code generation. |
Anders Carlsson | 2928c21 | 2009-05-16 21:02:39 +0000 | [diff] [blame] | 581 | if (getLangOptions().CPlusPlus && !VD->getInit() && |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 582 | (VD->getStorageClass() == VarDecl::Extern || |
Douglas Gregor | 48a83b5 | 2009-09-12 00:17:51 +0000 | [diff] [blame] | 583 | VD->isExternC())) |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 584 | return; |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 585 | |
| 586 | // In C, if this isn't a definition, defer code generation. |
| 587 | if (!getLangOptions().CPlusPlus && !VD->getInit()) |
| 588 | return; |
Nate Begeman | 4c13b7a | 2008-04-20 06:29:50 +0000 | [diff] [blame] | 589 | } |
| 590 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 591 | // Defer code generation when possible if this is a static definition, inline |
| 592 | // function etc. These we only want to emit if they are used. |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 593 | if (MayDeferGeneration(Global)) { |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 594 | // If the value has already been used, add it directly to the |
| 595 | // DeferredDeclsToEmit list. |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 596 | const char *MangledName = getMangledName(GD); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 597 | if (GlobalDeclMap.count(MangledName)) |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 598 | DeferredDeclsToEmit.push_back(GD); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 599 | else { |
| 600 | // Otherwise, remember that we saw a deferred decl with this name. The |
| 601 | // first use of the mangled name will cause it to move into |
| 602 | // DeferredDeclsToEmit. |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 603 | DeferredDecls[MangledName] = GD; |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 604 | } |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 605 | return; |
| 606 | } |
| 607 | |
| 608 | // Otherwise emit the definition. |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 609 | EmitGlobalDefinition(GD); |
Nate Begeman | 4c13b7a | 2008-04-20 06:29:50 +0000 | [diff] [blame] | 610 | } |
| 611 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 612 | void CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 613 | const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 614 | |
Anders Carlsson | 8e2efcc | 2009-10-27 14:32:27 +0000 | [diff] [blame] | 615 | PrettyStackTraceDecl CrashInfo((ValueDecl *)D, D->getLocation(), |
| 616 | Context.getSourceManager(), |
| 617 | "Generating code for declaration"); |
| 618 | |
Mike Stump | 5858894 | 2009-11-19 01:08:19 +0000 | [diff] [blame] | 619 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { |
| 620 | const CXXRecordDecl *RD = MD->getParent(); |
| 621 | // We have to convert it to have a record layout. |
| 622 | Types.ConvertTagDeclType(RD); |
| 623 | const CGRecordLayout &CGLayout = Types.getCGRecordLayout(RD); |
| 624 | // A definition of a KeyFunction, generates all the class data, such |
| 625 | // as vtable, rtti and the VTT. |
Mike Stump | a84b404 | 2009-11-20 00:02:19 +0000 | [diff] [blame^] | 626 | if (CGLayout.getKeyFunction() |
| 627 | && (CGLayout.getKeyFunction()->getCanonicalDecl() |
| 628 | == MD->getCanonicalDecl())) |
Mike Stump | 5858894 | 2009-11-19 01:08:19 +0000 | [diff] [blame] | 629 | getVtableInfo().GenerateClassData(RD); |
| 630 | } |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 631 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) |
| 632 | EmitCXXConstructor(CD, GD.getCtorType()); |
Anders Carlsson | 7267c16 | 2009-05-29 21:03:38 +0000 | [diff] [blame] | 633 | else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) |
| 634 | EmitCXXDestructor(DD, GD.getDtorType()); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 635 | else if (isa<FunctionDecl>(D)) |
| 636 | EmitGlobalFunctionDefinition(GD); |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 637 | else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 638 | EmitGlobalVarDefinition(VD); |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 639 | else { |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 640 | assert(0 && "Invalid argument to EmitGlobalDefinition()"); |
| 641 | } |
| 642 | } |
| 643 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 644 | /// GetOrCreateLLVMFunction - If the specified mangled name is not in the |
| 645 | /// module, create and return an llvm Function with the specified type. If there |
| 646 | /// is something in the module with the specified name, return it potentially |
| 647 | /// bitcasted to the right type. |
| 648 | /// |
| 649 | /// If D is non-null, it specifies a decl that correspond to this. This is used |
| 650 | /// to set the attributes on the function when it is first created. |
| 651 | llvm::Constant *CodeGenModule::GetOrCreateLLVMFunction(const char *MangledName, |
| 652 | const llvm::Type *Ty, |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 653 | GlobalDecl D) { |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 654 | // Lookup the entry, lazily creating it if necessary. |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 655 | llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; |
| 656 | if (Entry) { |
| 657 | if (Entry->getType()->getElementType() == Ty) |
| 658 | return Entry; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 659 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 660 | // Make sure the result is of the correct type. |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 661 | const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 662 | return llvm::ConstantExpr::getBitCast(Entry, PTy); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 663 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 664 | |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 665 | // This function doesn't have a complete type (for example, the return |
| 666 | // type is an incomplete struct). Use a fake type instead, and make |
| 667 | // sure not to try to set attributes. |
| 668 | bool IsIncompleteFunction = false; |
| 669 | if (!isa<llvm::FunctionType>(Ty)) { |
| 670 | Ty = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), |
| 671 | std::vector<const llvm::Type*>(), false); |
| 672 | IsIncompleteFunction = true; |
| 673 | } |
| 674 | llvm::Function *F = llvm::Function::Create(cast<llvm::FunctionType>(Ty), |
| 675 | llvm::Function::ExternalLinkage, |
| 676 | "", &getModule()); |
| 677 | F->setName(MangledName); |
| 678 | if (D.getDecl()) |
| 679 | SetFunctionAttributes(cast<FunctionDecl>(D.getDecl()), F, |
| 680 | IsIncompleteFunction); |
| 681 | Entry = F; |
| 682 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 683 | // This is the first use or definition of a mangled name. If there is a |
| 684 | // deferred decl with this name, remember that we need to emit it at the end |
| 685 | // of the file. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 686 | llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 687 | DeferredDecls.find(MangledName); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 688 | if (DDI != DeferredDecls.end()) { |
| 689 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit |
| 690 | // list, and remove it from DeferredDecls (since we don't need it anymore). |
| 691 | DeferredDeclsToEmit.push_back(DDI->second); |
| 692 | DeferredDecls.erase(DDI); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 693 | } else if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl())) { |
Chris Lattner | 0c337ed | 2009-05-12 21:02:27 +0000 | [diff] [blame] | 694 | // If this the first reference to a C++ inline function in a class, queue up |
| 695 | // the deferred function body for emission. These are not seen as |
| 696 | // top-level declarations. |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 697 | if (FD->isThisDeclarationADefinition() && MayDeferGeneration(FD)) |
| 698 | DeferredDeclsToEmit.push_back(D); |
Fariborz Jahanian | c7ff8e1 | 2009-07-30 23:22:00 +0000 | [diff] [blame] | 699 | // A called constructor which has no definition or declaration need be |
| 700 | // synthesized. |
| 701 | else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(FD)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 702 | const CXXRecordDecl *ClassDecl = |
Fariborz Jahanian | c7ff8e1 | 2009-07-30 23:22:00 +0000 | [diff] [blame] | 703 | cast<CXXRecordDecl>(CD->getDeclContext()); |
Fariborz Jahanian | 97a9375 | 2009-08-07 20:22:40 +0000 | [diff] [blame] | 704 | if (CD->isCopyConstructor(getContext())) |
| 705 | DeferredCopyConstructorToEmit(D); |
Fariborz Jahanian | 9889652 | 2009-08-06 23:38:16 +0000 | [diff] [blame] | 706 | else if (!ClassDecl->hasUserDeclaredConstructor()) |
Fariborz Jahanian | c7ff8e1 | 2009-07-30 23:22:00 +0000 | [diff] [blame] | 707 | DeferredDeclsToEmit.push_back(D); |
| 708 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 709 | else if (isa<CXXDestructorDecl>(FD)) |
Fariborz Jahanian | b193a41 | 2009-08-16 19:36:17 +0000 | [diff] [blame] | 710 | DeferredDestructorToEmit(D); |
Fariborz Jahanian | ad25883 | 2009-08-13 21:09:41 +0000 | [diff] [blame] | 711 | else if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) |
| 712 | if (MD->isCopyAssignment()) |
| 713 | DeferredCopyAssignmentToEmit(D); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 714 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 715 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 716 | return F; |
| 717 | } |
| 718 | |
Fariborz Jahanian | 97a9375 | 2009-08-07 20:22:40 +0000 | [diff] [blame] | 719 | /// Defer definition of copy constructor(s) which need be implicitly defined. |
| 720 | void CodeGenModule::DeferredCopyConstructorToEmit(GlobalDecl CopyCtorDecl) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 721 | const CXXConstructorDecl *CD = |
Fariborz Jahanian | 97a9375 | 2009-08-07 20:22:40 +0000 | [diff] [blame] | 722 | cast<CXXConstructorDecl>(CopyCtorDecl.getDecl()); |
| 723 | const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(CD->getDeclContext()); |
| 724 | if (ClassDecl->hasTrivialCopyConstructor() || |
| 725 | ClassDecl->hasUserDeclaredCopyConstructor()) |
| 726 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 727 | |
Fariborz Jahanian | 97a9375 | 2009-08-07 20:22:40 +0000 | [diff] [blame] | 728 | // First make sure all direct base classes and virtual bases and non-static |
| 729 | // data mebers which need to have their copy constructors implicitly defined |
| 730 | // are defined. 12.8.p7 |
| 731 | for (CXXRecordDecl::base_class_const_iterator Base = ClassDecl->bases_begin(); |
| 732 | Base != ClassDecl->bases_end(); ++Base) { |
Fariborz Jahanian | 97a9375 | 2009-08-07 20:22:40 +0000 | [diff] [blame] | 733 | CXXRecordDecl *BaseClassDecl |
| 734 | = cast<CXXRecordDecl>(Base->getType()->getAs<RecordType>()->getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 735 | if (CXXConstructorDecl *BaseCopyCtor = |
Fariborz Jahanian | 80e4b9e | 2009-08-08 00:59:58 +0000 | [diff] [blame] | 736 | BaseClassDecl->getCopyConstructor(Context, 0)) |
Fariborz Jahanian | 97a9375 | 2009-08-07 20:22:40 +0000 | [diff] [blame] | 737 | GetAddrOfCXXConstructor(BaseCopyCtor, Ctor_Complete); |
| 738 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 739 | |
Fariborz Jahanian | 97a9375 | 2009-08-07 20:22:40 +0000 | [diff] [blame] | 740 | for (CXXRecordDecl::field_iterator Field = ClassDecl->field_begin(), |
| 741 | FieldEnd = ClassDecl->field_end(); |
| 742 | Field != FieldEnd; ++Field) { |
Fariborz Jahanian | 97a9375 | 2009-08-07 20:22:40 +0000 | [diff] [blame] | 743 | QualType FieldType = Context.getCanonicalType((*Field)->getType()); |
| 744 | if (const ArrayType *Array = Context.getAsArrayType(FieldType)) |
| 745 | FieldType = Array->getElementType(); |
| 746 | if (const RecordType *FieldClassType = FieldType->getAs<RecordType>()) { |
Fariborz Jahanian | e649412 | 2009-08-11 18:49:54 +0000 | [diff] [blame] | 747 | if ((*Field)->isAnonymousStructOrUnion()) |
| 748 | continue; |
Fariborz Jahanian | 97a9375 | 2009-08-07 20:22:40 +0000 | [diff] [blame] | 749 | CXXRecordDecl *FieldClassDecl |
Fariborz Jahanian | e649412 | 2009-08-11 18:49:54 +0000 | [diff] [blame] | 750 | = cast<CXXRecordDecl>(FieldClassType->getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 751 | if (CXXConstructorDecl *FieldCopyCtor = |
Fariborz Jahanian | 80e4b9e | 2009-08-08 00:59:58 +0000 | [diff] [blame] | 752 | FieldClassDecl->getCopyConstructor(Context, 0)) |
Fariborz Jahanian | 97a9375 | 2009-08-07 20:22:40 +0000 | [diff] [blame] | 753 | GetAddrOfCXXConstructor(FieldCopyCtor, Ctor_Complete); |
| 754 | } |
| 755 | } |
| 756 | DeferredDeclsToEmit.push_back(CopyCtorDecl); |
Fariborz Jahanian | ad25883 | 2009-08-13 21:09:41 +0000 | [diff] [blame] | 757 | } |
| 758 | |
| 759 | /// Defer definition of copy assignments which need be implicitly defined. |
| 760 | void CodeGenModule::DeferredCopyAssignmentToEmit(GlobalDecl CopyAssignDecl) { |
| 761 | const CXXMethodDecl *CD = cast<CXXMethodDecl>(CopyAssignDecl.getDecl()); |
| 762 | const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(CD->getDeclContext()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 763 | |
Fariborz Jahanian | ad25883 | 2009-08-13 21:09:41 +0000 | [diff] [blame] | 764 | if (ClassDecl->hasTrivialCopyAssignment() || |
| 765 | ClassDecl->hasUserDeclaredCopyAssignment()) |
| 766 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 767 | |
Fariborz Jahanian | ad25883 | 2009-08-13 21:09:41 +0000 | [diff] [blame] | 768 | // First make sure all direct base classes and virtual bases and non-static |
| 769 | // data mebers which need to have their copy assignments implicitly defined |
| 770 | // are defined. 12.8.p12 |
| 771 | for (CXXRecordDecl::base_class_const_iterator Base = ClassDecl->bases_begin(); |
| 772 | Base != ClassDecl->bases_end(); ++Base) { |
| 773 | CXXRecordDecl *BaseClassDecl |
| 774 | = cast<CXXRecordDecl>(Base->getType()->getAs<RecordType>()->getDecl()); |
| 775 | const CXXMethodDecl *MD = 0; |
Fariborz Jahanian | 183d718 | 2009-08-14 00:01:54 +0000 | [diff] [blame] | 776 | if (!BaseClassDecl->hasTrivialCopyAssignment() && |
| 777 | !BaseClassDecl->hasUserDeclaredCopyAssignment() && |
| 778 | BaseClassDecl->hasConstCopyAssignment(getContext(), MD)) |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 779 | GetAddrOfFunction(MD, 0); |
Fariborz Jahanian | ad25883 | 2009-08-13 21:09:41 +0000 | [diff] [blame] | 780 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 781 | |
Fariborz Jahanian | ad25883 | 2009-08-13 21:09:41 +0000 | [diff] [blame] | 782 | for (CXXRecordDecl::field_iterator Field = ClassDecl->field_begin(), |
| 783 | FieldEnd = ClassDecl->field_end(); |
| 784 | Field != FieldEnd; ++Field) { |
| 785 | QualType FieldType = Context.getCanonicalType((*Field)->getType()); |
| 786 | if (const ArrayType *Array = Context.getAsArrayType(FieldType)) |
| 787 | FieldType = Array->getElementType(); |
| 788 | if (const RecordType *FieldClassType = FieldType->getAs<RecordType>()) { |
| 789 | if ((*Field)->isAnonymousStructOrUnion()) |
| 790 | continue; |
| 791 | CXXRecordDecl *FieldClassDecl |
| 792 | = cast<CXXRecordDecl>(FieldClassType->getDecl()); |
| 793 | const CXXMethodDecl *MD = 0; |
Fariborz Jahanian | 183d718 | 2009-08-14 00:01:54 +0000 | [diff] [blame] | 794 | if (!FieldClassDecl->hasTrivialCopyAssignment() && |
| 795 | !FieldClassDecl->hasUserDeclaredCopyAssignment() && |
| 796 | FieldClassDecl->hasConstCopyAssignment(getContext(), MD)) |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 797 | GetAddrOfFunction(MD, 0); |
Fariborz Jahanian | ad25883 | 2009-08-13 21:09:41 +0000 | [diff] [blame] | 798 | } |
| 799 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 800 | DeferredDeclsToEmit.push_back(CopyAssignDecl); |
Fariborz Jahanian | 97a9375 | 2009-08-07 20:22:40 +0000 | [diff] [blame] | 801 | } |
| 802 | |
Fariborz Jahanian | b193a41 | 2009-08-16 19:36:17 +0000 | [diff] [blame] | 803 | void CodeGenModule::DeferredDestructorToEmit(GlobalDecl DtorDecl) { |
| 804 | const CXXDestructorDecl *DD = cast<CXXDestructorDecl>(DtorDecl.getDecl()); |
| 805 | const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(DD->getDeclContext()); |
| 806 | if (ClassDecl->hasTrivialDestructor() || |
| 807 | ClassDecl->hasUserDeclaredDestructor()) |
| 808 | return; |
| 809 | |
| 810 | for (CXXRecordDecl::base_class_const_iterator Base = ClassDecl->bases_begin(); |
| 811 | Base != ClassDecl->bases_end(); ++Base) { |
| 812 | CXXRecordDecl *BaseClassDecl |
| 813 | = cast<CXXRecordDecl>(Base->getType()->getAs<RecordType>()->getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 814 | if (const CXXDestructorDecl *BaseDtor = |
Fariborz Jahanian | b193a41 | 2009-08-16 19:36:17 +0000 | [diff] [blame] | 815 | BaseClassDecl->getDestructor(Context)) |
| 816 | GetAddrOfCXXDestructor(BaseDtor, Dtor_Complete); |
| 817 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 818 | |
Fariborz Jahanian | b193a41 | 2009-08-16 19:36:17 +0000 | [diff] [blame] | 819 | for (CXXRecordDecl::field_iterator Field = ClassDecl->field_begin(), |
| 820 | FieldEnd = ClassDecl->field_end(); |
| 821 | Field != FieldEnd; ++Field) { |
| 822 | QualType FieldType = Context.getCanonicalType((*Field)->getType()); |
| 823 | if (const ArrayType *Array = Context.getAsArrayType(FieldType)) |
| 824 | FieldType = Array->getElementType(); |
| 825 | if (const RecordType *FieldClassType = FieldType->getAs<RecordType>()) { |
| 826 | if ((*Field)->isAnonymousStructOrUnion()) |
| 827 | continue; |
| 828 | CXXRecordDecl *FieldClassDecl |
| 829 | = cast<CXXRecordDecl>(FieldClassType->getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 830 | if (const CXXDestructorDecl *FieldDtor = |
Fariborz Jahanian | b193a41 | 2009-08-16 19:36:17 +0000 | [diff] [blame] | 831 | FieldClassDecl->getDestructor(Context)) |
| 832 | GetAddrOfCXXDestructor(FieldDtor, Dtor_Complete); |
| 833 | } |
| 834 | } |
| 835 | DeferredDeclsToEmit.push_back(DtorDecl); |
| 836 | } |
| 837 | |
| 838 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 839 | /// GetAddrOfFunction - Return the address of the given function. If Ty is |
| 840 | /// non-null, then this function will use the specified type if it has to |
| 841 | /// create it (this occurs when we see a definition of the function). |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 842 | llvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 843 | const llvm::Type *Ty) { |
| 844 | // If there was no specific requested type, just convert it now. |
| 845 | if (!Ty) |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 846 | Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); |
Douglas Gregor | 4fe95f9 | 2009-09-04 19:04:08 +0000 | [diff] [blame] | 847 | return GetOrCreateLLVMFunction(getMangledName(GD), Ty, GD); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 848 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 849 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 850 | /// CreateRuntimeFunction - Create a new runtime function with the specified |
| 851 | /// type and name. |
| 852 | llvm::Constant * |
| 853 | CodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, |
| 854 | const char *Name) { |
| 855 | // Convert Name to be a uniqued string from the IdentifierInfo table. |
Daniel Dunbar | e013d68 | 2009-10-18 20:26:12 +0000 | [diff] [blame] | 856 | Name = getContext().Idents.get(Name).getNameStart(); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 857 | return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 858 | } |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 859 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 860 | /// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, |
| 861 | /// create and return an llvm GlobalVariable with the specified type. If there |
| 862 | /// is something in the module with the specified name, return it potentially |
| 863 | /// bitcasted to the right type. |
| 864 | /// |
| 865 | /// If D is non-null, it specifies a decl that correspond to this. This is used |
| 866 | /// to set the attributes on the global when it is first created. |
| 867 | llvm::Constant *CodeGenModule::GetOrCreateLLVMGlobal(const char *MangledName, |
| 868 | const llvm::PointerType*Ty, |
| 869 | const VarDecl *D) { |
Daniel Dunbar | 3c827a7 | 2008-08-05 23:31:02 +0000 | [diff] [blame] | 870 | // Lookup the entry, lazily creating it if necessary. |
Chris Lattner | 5d4f5c7 | 2009-03-21 08:06:59 +0000 | [diff] [blame] | 871 | llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 872 | if (Entry) { |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 873 | if (Entry->getType() == Ty) |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 874 | return Entry; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 875 | |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 876 | // Make sure the result is of the correct type. |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 877 | return llvm::ConstantExpr::getBitCast(Entry, Ty); |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 878 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 879 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 880 | // This is the first use or definition of a mangled name. If there is a |
| 881 | // deferred decl with this name, remember that we need to emit it at the end |
| 882 | // of the file. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 883 | llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 884 | DeferredDecls.find(MangledName); |
| 885 | if (DDI != DeferredDecls.end()) { |
| 886 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit |
| 887 | // list, and remove it from DeferredDecls (since we don't need it anymore). |
| 888 | DeferredDeclsToEmit.push_back(DDI->second); |
| 889 | DeferredDecls.erase(DDI); |
| 890 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 891 | |
| 892 | llvm::GlobalVariable *GV = |
| 893 | new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 894 | llvm::GlobalValue::ExternalLinkage, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 895 | 0, "", 0, |
Eli Friedman | 56ebe50 | 2009-04-19 21:05:03 +0000 | [diff] [blame] | 896 | false, Ty->getAddressSpace()); |
Chris Lattner | d972678 | 2009-03-22 00:12:30 +0000 | [diff] [blame] | 897 | GV->setName(MangledName); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 898 | |
| 899 | // Handle things which are present even on external declarations. |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 900 | if (D) { |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 901 | // FIXME: This code is overly simple and should be merged with other global |
| 902 | // handling. |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 903 | GV->setConstant(D->getType().isConstant(Context)); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 904 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 905 | // FIXME: Merge with other attribute handling code. |
| 906 | if (D->getStorageClass() == VarDecl::PrivateExtern) |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 907 | GV->setVisibility(llvm::GlobalValue::HiddenVisibility); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 908 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 909 | if (D->hasAttr<WeakAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 910 | D->hasAttr<WeakImportAttr>()) |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 911 | GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); |
Eli Friedman | 56ebe50 | 2009-04-19 21:05:03 +0000 | [diff] [blame] | 912 | |
| 913 | GV->setThreadLocal(D->isThreadSpecified()); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 914 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 915 | |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 916 | return Entry = GV; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 917 | } |
| 918 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 919 | |
| 920 | /// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the |
| 921 | /// given global variable. If Ty is non-null and if the global doesn't exist, |
| 922 | /// then it will be greated with the specified type instead of whatever the |
| 923 | /// normal requested type would be. |
| 924 | llvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, |
| 925 | const llvm::Type *Ty) { |
| 926 | assert(D->hasGlobalStorage() && "Not a global variable"); |
| 927 | QualType ASTTy = D->getType(); |
| 928 | if (Ty == 0) |
| 929 | Ty = getTypes().ConvertTypeForMem(ASTTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 930 | |
| 931 | const llvm::PointerType *PTy = |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 932 | llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 933 | return GetOrCreateLLVMGlobal(getMangledName(D), PTy, D); |
| 934 | } |
| 935 | |
| 936 | /// CreateRuntimeVariable - Create a new runtime global variable with the |
| 937 | /// specified type and name. |
| 938 | llvm::Constant * |
| 939 | CodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, |
| 940 | const char *Name) { |
| 941 | // Convert Name to be a uniqued string from the IdentifierInfo table. |
Daniel Dunbar | e013d68 | 2009-10-18 20:26:12 +0000 | [diff] [blame] | 942 | Name = getContext().Idents.get(Name).getNameStart(); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 943 | return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 944 | } |
| 945 | |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 946 | void CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { |
| 947 | assert(!D->getInit() && "Cannot emit definite definitions here!"); |
| 948 | |
Douglas Gregor | 7520bd1 | 2009-04-21 19:28:58 +0000 | [diff] [blame] | 949 | if (MayDeferGeneration(D)) { |
| 950 | // If we have not seen a reference to this variable yet, place it |
| 951 | // into the deferred declarations table to be emitted if needed |
| 952 | // later. |
| 953 | const char *MangledName = getMangledName(D); |
| 954 | if (GlobalDeclMap.count(MangledName) == 0) { |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 955 | DeferredDecls[MangledName] = D; |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 956 | return; |
Douglas Gregor | 7520bd1 | 2009-04-21 19:28:58 +0000 | [diff] [blame] | 957 | } |
| 958 | } |
| 959 | |
| 960 | // The tentative definition is the only definition. |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 961 | EmitGlobalVarDefinition(D); |
| 962 | } |
| 963 | |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 964 | static CodeGenModule::GVALinkage |
| 965 | GetLinkageForVariable(ASTContext &Context, const VarDecl *VD) { |
| 966 | // Everything located semantically within an anonymous namespace is |
| 967 | // always internal. |
| 968 | if (VD->isInAnonymousNamespace()) |
| 969 | return CodeGenModule::GVA_Internal; |
| 970 | |
| 971 | // Handle linkage for static data members. |
| 972 | if (VD->isStaticDataMember()) { |
| 973 | switch (VD->getTemplateSpecializationKind()) { |
| 974 | case TSK_Undeclared: |
| 975 | case TSK_ExplicitSpecialization: |
| 976 | case TSK_ExplicitInstantiationDefinition: |
| 977 | return CodeGenModule::GVA_StrongExternal; |
| 978 | |
| 979 | case TSK_ExplicitInstantiationDeclaration: |
Douglas Gregor | 9f0306d | 2009-10-26 16:27:58 +0000 | [diff] [blame] | 980 | llvm::llvm_unreachable("Variable should not be instantiated"); |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 981 | // Fall through to treat this like any other instantiation. |
| 982 | |
| 983 | case TSK_ImplicitInstantiation: |
| 984 | return CodeGenModule::GVA_TemplateInstantiation; |
| 985 | } |
| 986 | } |
| 987 | |
| 988 | // Static variables get internal linkage. |
| 989 | if (VD->getStorageClass() == VarDecl::Static) |
| 990 | return CodeGenModule::GVA_Internal; |
| 991 | |
| 992 | return CodeGenModule::GVA_StrongExternal; |
| 993 | } |
| 994 | |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 995 | void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { |
Chris Lattner | 8f32f71 | 2007-07-14 00:23:28 +0000 | [diff] [blame] | 996 | llvm::Constant *Init = 0; |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 997 | QualType ASTTy = D->getType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 998 | |
Chris Lattner | 8f32f71 | 2007-07-14 00:23:28 +0000 | [diff] [blame] | 999 | if (D->getInit() == 0) { |
Eli Friedman | cd5f4aa | 2008-05-30 20:39:54 +0000 | [diff] [blame] | 1000 | // This is a tentative definition; tentative definitions are |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 1001 | // implicitly initialized with { 0 }. |
| 1002 | // |
| 1003 | // Note that tentative definitions are only emitted at the end of |
| 1004 | // a translation unit, so they should never have incomplete |
| 1005 | // type. In addition, EmitTentativeDefinition makes sure that we |
| 1006 | // never attempt to emit a tentative definition if a real one |
| 1007 | // exists. A use may still exists, however, so we still may need |
| 1008 | // to do a RAUW. |
| 1009 | assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); |
Anders Carlsson | b0d0ea0 | 2009-08-02 21:18:22 +0000 | [diff] [blame] | 1010 | Init = EmitNullConstant(D->getType()); |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1011 | } else { |
Anders Carlsson | e9352cc | 2009-04-08 04:48:15 +0000 | [diff] [blame] | 1012 | Init = EmitConstantExpr(D->getInit(), D->getType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1013 | |
Eli Friedman | 6e656f4 | 2009-02-20 01:18:21 +0000 | [diff] [blame] | 1014 | if (!Init) { |
Eli Friedman | 6e656f4 | 2009-02-20 01:18:21 +0000 | [diff] [blame] | 1015 | QualType T = D->getInit()->getType(); |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 1016 | if (getLangOptions().CPlusPlus) { |
| 1017 | CXXGlobalInits.push_back(D); |
| 1018 | Init = EmitNullConstant(T); |
| 1019 | } else { |
| 1020 | ErrorUnsupported(D, "static initializer"); |
| 1021 | Init = llvm::UndefValue::get(getTypes().ConvertType(T)); |
| 1022 | } |
Eli Friedman | 6e656f4 | 2009-02-20 01:18:21 +0000 | [diff] [blame] | 1023 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1024 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1025 | |
Chris Lattner | 2d58406 | 2009-03-21 08:13:05 +0000 | [diff] [blame] | 1026 | const llvm::Type* InitType = Init->getType(); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1027 | llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1028 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1029 | // Strip off a bitcast if we got one back. |
| 1030 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1031 | assert(CE->getOpcode() == llvm::Instruction::BitCast || |
| 1032 | // all zero index gep. |
| 1033 | CE->getOpcode() == llvm::Instruction::GetElementPtr); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1034 | Entry = CE->getOperand(0); |
| 1035 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1036 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1037 | // Entry is now either a Function or GlobalVariable. |
| 1038 | llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1039 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1040 | // We have a definition after a declaration with the wrong type. |
| 1041 | // We must make a new GlobalVariable* and update everything that used OldGV |
| 1042 | // (a declaration or tentative definition) with the new GlobalVariable* |
| 1043 | // (which will be a definition). |
| 1044 | // |
| 1045 | // This happens if there is a prototype for a global (e.g. |
| 1046 | // "extern int x[];") and then a definition of a different type (e.g. |
| 1047 | // "int x[10];"). This also happens when an initializer has a different type |
| 1048 | // from the type of the global (this happens with unions). |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1049 | if (GV == 0 || |
| 1050 | GV->getType()->getElementType() != InitType || |
| 1051 | GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1052 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1053 | // Remove the old entry from GlobalDeclMap so that we'll create a new one. |
| 1054 | GlobalDeclMap.erase(getMangledName(D)); |
Daniel Dunbar | 232350d | 2009-02-19 05:36:41 +0000 | [diff] [blame] | 1055 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1056 | // Make a new global with the correct type, this is now guaranteed to work. |
| 1057 | GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1058 | GV->takeName(cast<llvm::GlobalValue>(Entry)); |
| 1059 | |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1060 | // Replace all uses of the old global with the new global |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1061 | llvm::Constant *NewPtrForOldDecl = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1062 | llvm::ConstantExpr::getBitCast(GV, Entry->getType()); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1063 | Entry->replaceAllUsesWith(NewPtrForOldDecl); |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1064 | |
| 1065 | // Erase the old global, since it is no longer used. |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1066 | cast<llvm::GlobalValue>(Entry)->eraseFromParent(); |
Chris Lattner | 8f32f71 | 2007-07-14 00:23:28 +0000 | [diff] [blame] | 1067 | } |
Devang Patel | 8e53e72 | 2007-10-26 16:31:40 +0000 | [diff] [blame] | 1068 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1069 | if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1070 | SourceManager &SM = Context.getSourceManager(); |
| 1071 | AddAnnotation(EmitAnnotateAttr(GV, AA, |
Chris Lattner | f7cf85b | 2009-01-16 07:36:28 +0000 | [diff] [blame] | 1072 | SM.getInstantiationLineNumber(D->getLocation()))); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1073 | } |
| 1074 | |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1075 | GV->setInitializer(Init); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1076 | |
| 1077 | // If it is safe to mark the global 'constant', do so now. |
| 1078 | GV->setConstant(false); |
| 1079 | if (D->getType().isConstant(Context)) { |
| 1080 | // FIXME: In C++, if the variable has a non-trivial ctor/dtor or any mutable |
| 1081 | // members, it cannot be declared "LLVM const". |
| 1082 | GV->setConstant(true); |
| 1083 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1084 | |
Eli Friedman | 0de40af | 2009-02-27 04:11:37 +0000 | [diff] [blame] | 1085 | GV->setAlignment(getContext().getDeclAlignInBytes(D)); |
Eli Friedman | 08d7802 | 2008-05-29 11:10:27 +0000 | [diff] [blame] | 1086 | |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1087 | // Set the llvm linkage type as appropriate. |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1088 | GVALinkage Linkage = GetLinkageForVariable(getContext(), D); |
Douglas Gregor | a0f00a7 | 2009-10-14 21:36:34 +0000 | [diff] [blame] | 1089 | if (Linkage == GVA_Internal) |
Chris Lattner | 8fabd78 | 2008-05-04 01:44:26 +0000 | [diff] [blame] | 1090 | GV->setLinkage(llvm::Function::InternalLinkage); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1091 | else if (D->hasAttr<DLLImportAttr>()) |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1092 | GV->setLinkage(llvm::Function::DLLImportLinkage); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1093 | else if (D->hasAttr<DLLExportAttr>()) |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1094 | GV->setLinkage(llvm::Function::DLLExportLinkage); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1095 | else if (D->hasAttr<WeakAttr>()) { |
| 1096 | if (GV->isConstant()) |
| 1097 | GV->setLinkage(llvm::GlobalVariable::WeakODRLinkage); |
| 1098 | else |
| 1099 | GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1100 | } else if (Linkage == GVA_TemplateInstantiation) |
| 1101 | GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 1102 | else if (!CodeGenOpts.NoCommon && |
Chris Lattner | 309457d | 2009-08-05 04:56:58 +0000 | [diff] [blame] | 1103 | !D->hasExternalStorage() && !D->getInit() && |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1104 | !D->getAttr<SectionAttr>()) { |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1105 | GV->setLinkage(llvm::GlobalVariable::CommonLinkage); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1106 | // common vars aren't constant even if declared const. |
| 1107 | GV->setConstant(false); |
| 1108 | } else |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1109 | GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 1110 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1111 | SetCommonAttributes(D, GV); |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1112 | |
Sanjiv Gupta | 686226b | 2008-06-05 08:59:10 +0000 | [diff] [blame] | 1113 | // Emit global variable debug information. |
Chris Lattner | 2d58406 | 2009-03-21 08:13:05 +0000 | [diff] [blame] | 1114 | if (CGDebugInfo *DI = getDebugInfo()) { |
Daniel Dunbar | 66031a5 | 2008-10-17 16:15:48 +0000 | [diff] [blame] | 1115 | DI->setLocation(D->getLocation()); |
Sanjiv Gupta | 686226b | 2008-06-05 08:59:10 +0000 | [diff] [blame] | 1116 | DI->EmitGlobalVariable(GV, D); |
| 1117 | } |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1118 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1119 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1120 | /// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we |
| 1121 | /// implement a function with no prototype, e.g. "int foo() {}". If there are |
| 1122 | /// existing call uses of the old function in the module, this adjusts them to |
| 1123 | /// call the new function directly. |
| 1124 | /// |
| 1125 | /// This is not just a cleanup: the always_inline pass requires direct calls to |
| 1126 | /// functions to be able to inline them. If there is a bitcast in the way, it |
| 1127 | /// won't inline them. Instcombine normally deletes these calls, but it isn't |
| 1128 | /// run at -O0. |
| 1129 | static void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, |
| 1130 | llvm::Function *NewFn) { |
| 1131 | // If we're redefining a global as a function, don't transform it. |
| 1132 | llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); |
| 1133 | if (OldFn == 0) return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1134 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1135 | const llvm::Type *NewRetTy = NewFn->getReturnType(); |
| 1136 | llvm::SmallVector<llvm::Value*, 4> ArgList; |
| 1137 | |
| 1138 | for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); |
| 1139 | UI != E; ) { |
| 1140 | // 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] | 1141 | unsigned OpNo = UI.getOperandNo(); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1142 | llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*UI++); |
Chris Lattner | 08c93a7 | 2009-06-04 16:47:43 +0000 | [diff] [blame] | 1143 | if (!CI || OpNo != 0) continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1144 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1145 | // If the return types don't match exactly, and if the call isn't dead, then |
| 1146 | // we can't transform this call. |
| 1147 | if (CI->getType() != NewRetTy && !CI->use_empty()) |
| 1148 | continue; |
| 1149 | |
| 1150 | // If the function was passed too few arguments, don't transform. If extra |
| 1151 | // arguments were passed, we silently drop them. If any of the types |
| 1152 | // mismatch, we don't transform. |
| 1153 | unsigned ArgNo = 0; |
| 1154 | bool DontTransform = false; |
| 1155 | for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), |
| 1156 | E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { |
| 1157 | if (CI->getNumOperands()-1 == ArgNo || |
| 1158 | CI->getOperand(ArgNo+1)->getType() != AI->getType()) { |
| 1159 | DontTransform = true; |
| 1160 | break; |
| 1161 | } |
| 1162 | } |
| 1163 | if (DontTransform) |
| 1164 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1165 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1166 | // Okay, we can transform this. Create the new call instruction and copy |
| 1167 | // over the required information. |
| 1168 | ArgList.append(CI->op_begin()+1, CI->op_begin()+1+ArgNo); |
| 1169 | llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), |
| 1170 | ArgList.end(), "", CI); |
| 1171 | ArgList.clear(); |
Benjamin Kramer | ffbb15e | 2009-10-05 13:47:21 +0000 | [diff] [blame] | 1172 | if (!NewCall->getType()->isVoidTy()) |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1173 | NewCall->takeName(CI); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1174 | NewCall->setAttributes(CI->getAttributes()); |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 1175 | NewCall->setCallingConv(CI->getCallingConv()); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1176 | |
| 1177 | // Finally, remove the old call, replacing any uses with the new one. |
Chris Lattner | 00549fc | 2009-10-14 05:49:21 +0000 | [diff] [blame] | 1178 | if (!CI->use_empty()) |
| 1179 | CI->replaceAllUsesWith(NewCall); |
Devang Patel | 3b122bc | 2009-10-13 17:02:04 +0000 | [diff] [blame] | 1180 | |
Devang Patel | aa40454 | 2009-10-14 17:03:29 +0000 | [diff] [blame] | 1181 | // Copy any custom metadata attached with CI. |
| 1182 | llvm::MetadataContext &TheMetadata = CI->getContext().getMetadata(); |
| 1183 | TheMetadata.copyMD(CI, NewCall); |
| 1184 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1185 | CI->eraseFromParent(); |
| 1186 | } |
| 1187 | } |
| 1188 | |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1189 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1190 | void CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { |
Anders Carlsson | 2b77ba8 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 1191 | const llvm::FunctionType *Ty; |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1192 | const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1193 | |
Anders Carlsson | 2b77ba8 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 1194 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1195 | bool isVariadic = D->getType()->getAs<FunctionProtoType>()->isVariadic(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1196 | |
Anders Carlsson | 2b77ba8 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 1197 | Ty = getTypes().GetFunctionType(getTypes().getFunctionInfo(MD), isVariadic); |
| 1198 | } else { |
| 1199 | Ty = cast<llvm::FunctionType>(getTypes().ConvertType(D->getType())); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1200 | |
Anders Carlsson | 2b77ba8 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 1201 | // As a special case, make sure that definitions of K&R function |
| 1202 | // "type foo()" aren't declared as varargs (which forces the backend |
| 1203 | // to do unnecessary work). |
| 1204 | if (D->getType()->isFunctionNoProtoType()) { |
| 1205 | assert(Ty->isVarArg() && "Didn't lower type as expected"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1206 | // Due to stret, the lowered function could have arguments. |
| 1207 | // Just create the same type as was lowered by ConvertType |
Anders Carlsson | 2b77ba8 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 1208 | // but strip off the varargs bit. |
| 1209 | std::vector<const llvm::Type*> Args(Ty->param_begin(), Ty->param_end()); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1210 | Ty = llvm::FunctionType::get(Ty->getReturnType(), Args, false); |
Anders Carlsson | 2b77ba8 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 1211 | } |
Chris Lattner | ff75e1d | 2009-03-22 19:35:37 +0000 | [diff] [blame] | 1212 | } |
Daniel Dunbar | d5d3180 | 2009-02-19 07:15:39 +0000 | [diff] [blame] | 1213 | |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 1214 | // Get or create the prototype for the function. |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1215 | llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1216 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1217 | // Strip off a bitcast if we got one back. |
| 1218 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { |
| 1219 | assert(CE->getOpcode() == llvm::Instruction::BitCast); |
| 1220 | Entry = CE->getOperand(0); |
| 1221 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1222 | |
| 1223 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1224 | if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1225 | llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1226 | |
Daniel Dunbar | 4274581 | 2009-03-09 23:53:08 +0000 | [diff] [blame] | 1227 | // If the types mismatch then we have to rewrite the definition. |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1228 | assert(OldFn->isDeclaration() && |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1229 | "Shouldn't replace non-declaration"); |
Chris Lattner | 3480950 | 2009-03-21 08:53:37 +0000 | [diff] [blame] | 1230 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 1231 | // F is the Function* for the one with the wrong type, we must make a new |
| 1232 | // Function* and update everything that used F (a declaration) with the new |
| 1233 | // Function* (which will be a definition). |
| 1234 | // |
| 1235 | // This happens if there is a prototype for a function |
| 1236 | // (e.g. "int f()") and then a definition of a different type |
| 1237 | // (e.g. "int f(int x)"). Start by making a new function of the |
| 1238 | // correct type, RAUW, then steal the name. |
Chris Lattner | 3480950 | 2009-03-21 08:53:37 +0000 | [diff] [blame] | 1239 | GlobalDeclMap.erase(getMangledName(D)); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1240 | llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1241 | NewFn->takeName(OldFn); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1242 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1243 | // If this is an implementation of a function without a prototype, try to |
| 1244 | // replace any existing uses of the function (which may be calls) with uses |
| 1245 | // of the new function |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 1246 | if (D->getType()->isFunctionNoProtoType()) { |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1247 | ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 1248 | OldFn->removeDeadConstantUsers(); |
| 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 | // 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] | 1252 | if (!Entry->use_empty()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1253 | llvm::Constant *NewPtrForOldDecl = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1254 | llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1255 | Entry->replaceAllUsesWith(NewPtrForOldDecl); |
| 1256 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1257 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 1258 | // Ok, delete the old function now, which is dead. |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1259 | OldFn->eraseFromParent(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1260 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1261 | Entry = NewFn; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1262 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1263 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1264 | llvm::Function *Fn = cast<llvm::Function>(Entry); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1265 | |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1266 | CodeGenFunction(*this).GenerateCode(D, Fn); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 1267 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1268 | SetFunctionDefinitionAttributes(D, Fn); |
| 1269 | SetLLVMFunctionAttributesForDefinition(D, Fn); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1270 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1271 | if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1272 | AddGlobalCtor(Fn, CA->getPriority()); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1273 | if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1274 | AddGlobalDtor(Fn, DA->getPriority()); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1275 | } |
| 1276 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1277 | void CodeGenModule::EmitAliasDefinition(const ValueDecl *D) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1278 | const AliasAttr *AA = D->getAttr<AliasAttr>(); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1279 | assert(AA && "Not an alias?"); |
| 1280 | |
| 1281 | const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1282 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1283 | // Unique the name through the identifier table. |
| 1284 | const char *AliaseeName = AA->getAliasee().c_str(); |
Daniel Dunbar | e013d68 | 2009-10-18 20:26:12 +0000 | [diff] [blame] | 1285 | AliaseeName = getContext().Idents.get(AliaseeName).getNameStart(); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1286 | |
| 1287 | // Create a reference to the named value. This ensures that it is emitted |
| 1288 | // if a deferred decl. |
| 1289 | llvm::Constant *Aliasee; |
| 1290 | if (isa<llvm::FunctionType>(DeclTy)) |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1291 | Aliasee = GetOrCreateLLVMFunction(AliaseeName, DeclTy, GlobalDecl()); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1292 | else |
| 1293 | Aliasee = GetOrCreateLLVMGlobal(AliaseeName, |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1294 | llvm::PointerType::getUnqual(DeclTy), 0); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1295 | |
| 1296 | // Create the new alias itself, but don't set a name yet. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1297 | llvm::GlobalValue *GA = |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1298 | new llvm::GlobalAlias(Aliasee->getType(), |
| 1299 | llvm::Function::ExternalLinkage, |
| 1300 | "", Aliasee, &getModule()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1301 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1302 | // See if there is already something with the alias' name in the module. |
| 1303 | const char *MangledName = getMangledName(D); |
| 1304 | llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; |
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 && !Entry->isDeclaration()) { |
| 1307 | // If there is a definition in the module, then it wins over the alias. |
| 1308 | // This is dubious, but allow it to be safe. Just ignore the alias. |
| 1309 | GA->eraseFromParent(); |
| 1310 | return; |
| 1311 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1312 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1313 | if (Entry) { |
| 1314 | // If there is a declaration in the module, then we had an extern followed |
| 1315 | // by the alias, as in: |
| 1316 | // extern int test6(); |
| 1317 | // ... |
| 1318 | // int test6() __attribute__((alias("test7"))); |
| 1319 | // |
| 1320 | // Remove it and replace uses of it with the alias. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1321 | |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1322 | Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1323 | Entry->getType())); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1324 | Entry->eraseFromParent(); |
| 1325 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1326 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1327 | // Now we know that there is no conflict, set the name. |
| 1328 | Entry = GA; |
| 1329 | GA->setName(MangledName); |
| 1330 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1331 | // Set attributes which are particular to an alias; this is a |
| 1332 | // specialization of the attributes which may be set on a global |
| 1333 | // variable/function. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1334 | if (D->hasAttr<DLLExportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1335 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 1336 | // The dllexport attribute is ignored for undefined symbols. |
Argyrios Kyrtzidis | 6fb0aee | 2009-06-30 02:35:26 +0000 | [diff] [blame] | 1337 | if (FD->getBody()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1338 | GA->setLinkage(llvm::Function::DLLExportLinkage); |
| 1339 | } else { |
| 1340 | GA->setLinkage(llvm::Function::DLLExportLinkage); |
| 1341 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1342 | } else if (D->hasAttr<WeakAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1343 | D->hasAttr<WeakImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1344 | GA->setLinkage(llvm::Function::WeakAnyLinkage); |
| 1345 | } |
| 1346 | |
| 1347 | SetCommonAttributes(D, GA); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1348 | } |
| 1349 | |
Chris Lattner | b808c95 | 2009-03-22 21:56:56 +0000 | [diff] [blame] | 1350 | /// getBuiltinLibFunction - Given a builtin id for a function like |
| 1351 | /// "__builtin_fabsf", return a Function* for "fabsf". |
Daniel Dunbar | 34771b5 | 2009-09-14 04:33:21 +0000 | [diff] [blame] | 1352 | llvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, |
| 1353 | unsigned BuiltinID) { |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1354 | assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1355 | Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1356 | "isn't a lib fn"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1357 | |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1358 | // Get the name, skip over the __builtin_ prefix (if necessary). |
| 1359 | const char *Name = Context.BuiltinInfo.GetName(BuiltinID); |
| 1360 | if (Context.BuiltinInfo.isLibFunction(BuiltinID)) |
| 1361 | Name += 10; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1362 | |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1363 | // Get the type for the builtin. |
Chris Lattner | 86df27b | 2009-06-14 00:45:47 +0000 | [diff] [blame] | 1364 | ASTContext::GetBuiltinTypeError Error; |
| 1365 | QualType Type = Context.GetBuiltinType(BuiltinID, Error); |
| 1366 | assert(Error == ASTContext::GE_None && "Can't get builtin type"); |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 1367 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1368 | const llvm::FunctionType *Ty = |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1369 | cast<llvm::FunctionType>(getTypes().ConvertType(Type)); |
| 1370 | |
Chris Lattner | b808c95 | 2009-03-22 21:56:56 +0000 | [diff] [blame] | 1371 | // Unique the name through the identifier table. |
Daniel Dunbar | e013d68 | 2009-10-18 20:26:12 +0000 | [diff] [blame] | 1372 | Name = getContext().Idents.get(Name).getNameStart(); |
Daniel Dunbar | 34771b5 | 2009-09-14 04:33:21 +0000 | [diff] [blame] | 1373 | return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD)); |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1374 | } |
| 1375 | |
Chris Lattner | 7acda7c | 2007-12-18 00:25:38 +0000 | [diff] [blame] | 1376 | llvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, |
| 1377 | unsigned NumTys) { |
| 1378 | return llvm::Intrinsic::getDeclaration(&getModule(), |
| 1379 | (llvm::Intrinsic::ID)IID, Tys, NumTys); |
| 1380 | } |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1381 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1382 | llvm::Function *CodeGenModule::getMemCpyFn() { |
| 1383 | if (MemCpyFn) return MemCpyFn; |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1384 | const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); |
Chris Lattner | 4e8a9e8 | 2008-11-21 16:43:15 +0000 | [diff] [blame] | 1385 | return MemCpyFn = getIntrinsic(llvm::Intrinsic::memcpy, &IntPtr, 1); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1386 | } |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1387 | |
Eli Friedman | 0c99509 | 2008-05-26 12:59:39 +0000 | [diff] [blame] | 1388 | llvm::Function *CodeGenModule::getMemMoveFn() { |
| 1389 | if (MemMoveFn) return MemMoveFn; |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1390 | const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); |
Chris Lattner | 4e8a9e8 | 2008-11-21 16:43:15 +0000 | [diff] [blame] | 1391 | return MemMoveFn = getIntrinsic(llvm::Intrinsic::memmove, &IntPtr, 1); |
Eli Friedman | 0c99509 | 2008-05-26 12:59:39 +0000 | [diff] [blame] | 1392 | } |
| 1393 | |
Lauro Ramos Venancio | 41ef30e | 2008-02-19 22:01:01 +0000 | [diff] [blame] | 1394 | llvm::Function *CodeGenModule::getMemSetFn() { |
| 1395 | if (MemSetFn) return MemSetFn; |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1396 | const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); |
Chris Lattner | 4e8a9e8 | 2008-11-21 16:43:15 +0000 | [diff] [blame] | 1397 | return MemSetFn = getIntrinsic(llvm::Intrinsic::memset, &IntPtr, 1); |
Lauro Ramos Venancio | 41ef30e | 2008-02-19 22:01:01 +0000 | [diff] [blame] | 1398 | } |
Chris Lattner | 7acda7c | 2007-12-18 00:25:38 +0000 | [diff] [blame] | 1399 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1400 | static llvm::StringMapEntry<llvm::Constant*> & |
| 1401 | GetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, |
| 1402 | const StringLiteral *Literal, |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1403 | bool TargetIsLSB, |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1404 | bool &IsUTF16, |
| 1405 | unsigned &StringLength) { |
Daniel Dunbar | df4eee9 | 2009-09-22 03:27:52 +0000 | [diff] [blame] | 1406 | unsigned NumBytes = Literal->getByteLength(); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1407 | |
Daniel Dunbar | f015b03 | 2009-09-22 10:03:52 +0000 | [diff] [blame] | 1408 | // Check for simple case. |
| 1409 | if (!Literal->containsNonAsciiOrNull()) { |
| 1410 | StringLength = NumBytes; |
| 1411 | return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), |
| 1412 | StringLength)); |
| 1413 | } |
| 1414 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1415 | // Otherwise, convert the UTF8 literals into a byte string. |
| 1416 | llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); |
| 1417 | const UTF8 *FromPtr = (UTF8 *)Literal->getStrData(); |
| 1418 | UTF16 *ToPtr = &ToBuf[0]; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1419 | |
| 1420 | ConversionResult Result = ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1421 | &ToPtr, ToPtr + NumBytes, |
| 1422 | strictConversion); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1423 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1424 | // Check for conversion failure. |
| 1425 | if (Result != conversionOK) { |
| 1426 | // FIXME: Have Sema::CheckObjCString() validate the UTF-8 string and remove |
| 1427 | // this duplicate code. |
| 1428 | assert(Result == sourceIllegal && "UTF-8 to UTF-16 conversion failed"); |
Daniel Dunbar | f015b03 | 2009-09-22 10:03:52 +0000 | [diff] [blame] | 1429 | StringLength = NumBytes; |
| 1430 | return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), |
| 1431 | StringLength)); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1432 | } |
| 1433 | |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1434 | // ConvertUTF8toUTF16 returns the length in ToPtr. |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1435 | StringLength = ToPtr - &ToBuf[0]; |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1436 | |
| 1437 | // Render the UTF-16 string into a byte array and convert to the target byte |
| 1438 | // order. |
| 1439 | // |
| 1440 | // FIXME: This isn't something we should need to do here. |
| 1441 | llvm::SmallString<128> AsBytes; |
| 1442 | AsBytes.reserve(StringLength * 2); |
| 1443 | for (unsigned i = 0; i != StringLength; ++i) { |
| 1444 | unsigned short Val = ToBuf[i]; |
| 1445 | if (TargetIsLSB) { |
| 1446 | AsBytes.push_back(Val & 0xFF); |
| 1447 | AsBytes.push_back(Val >> 8); |
| 1448 | } else { |
| 1449 | AsBytes.push_back(Val >> 8); |
| 1450 | AsBytes.push_back(Val & 0xFF); |
| 1451 | } |
| 1452 | } |
Daniel Dunbar | 434da48 | 2009-08-03 21:47:08 +0000 | [diff] [blame] | 1453 | // Append one extra null character, the second is automatically added by our |
| 1454 | // caller. |
| 1455 | AsBytes.push_back(0); |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1456 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1457 | IsUTF16 = true; |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1458 | return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1459 | } |
| 1460 | |
| 1461 | llvm::Constant * |
| 1462 | CodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { |
| 1463 | unsigned StringLength = 0; |
| 1464 | bool isUTF16 = false; |
| 1465 | llvm::StringMapEntry<llvm::Constant*> &Entry = |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1466 | GetConstantCFStringEntry(CFConstantStringMap, Literal, |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1467 | getTargetData().isLittleEndian(), |
| 1468 | isUTF16, StringLength); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1469 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1470 | if (llvm::Constant *C = Entry.getValue()) |
| 1471 | return C; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1472 | |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1473 | llvm::Constant *Zero = |
| 1474 | llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1475 | llvm::Constant *Zeros[] = { Zero, Zero }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1476 | |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1477 | // If we don't already have it, get __CFConstantStringClassReference. |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1478 | if (!CFConstantStringClassRef) { |
| 1479 | const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1480 | Ty = llvm::ArrayType::get(Ty, 0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1481 | llvm::Constant *GV = CreateRuntimeVariable(Ty, |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1482 | "__CFConstantStringClassReference"); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1483 | // Decay array -> ptr |
| 1484 | CFConstantStringClassRef = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1485 | llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1486 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1487 | |
Anders Carlsson | e3daa76 | 2008-11-15 18:54:24 +0000 | [diff] [blame] | 1488 | QualType CFTy = getContext().getCFConstantStringType(); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1489 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1490 | const llvm::StructType *STy = |
Anders Carlsson | e3daa76 | 2008-11-15 18:54:24 +0000 | [diff] [blame] | 1491 | cast<llvm::StructType>(getTypes().ConvertType(CFTy)); |
| 1492 | |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1493 | std::vector<llvm::Constant*> Fields(4); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 1494 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1495 | // Class pointer. |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1496 | Fields[0] = CFConstantStringClassRef; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1497 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1498 | // Flags. |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1499 | const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1500 | Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1501 | llvm::ConstantInt::get(Ty, 0x07C8); |
| 1502 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1503 | // String pointer. |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1504 | llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1505 | |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1506 | const char *Sect = 0; |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1507 | llvm::GlobalValue::LinkageTypes Linkage; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1508 | bool isConstant; |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1509 | if (isUTF16) { |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1510 | Sect = getContext().Target.getUnicodeStringSection(); |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1511 | // FIXME: why do utf strings get "_" labels instead of "L" labels? |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1512 | Linkage = llvm::GlobalValue::InternalLinkage; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1513 | // Note: -fwritable-strings doesn't make unicode CFStrings writable, but |
| 1514 | // does make plain ascii ones writable. |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1515 | isConstant = true; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1516 | } else { |
| 1517 | Linkage = llvm::GlobalValue::PrivateLinkage; |
| 1518 | isConstant = !Features.WritableStrings; |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1519 | } |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1520 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1521 | llvm::GlobalVariable *GV = |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1522 | new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, |
| 1523 | ".str"); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1524 | if (Sect) |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1525 | GV->setSection(Sect); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1526 | if (isUTF16) { |
| 1527 | unsigned Align = getContext().getTypeAlign(getContext().ShortTy)/8; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1528 | GV->setAlignment(Align); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1529 | } |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1530 | Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); |
| 1531 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1532 | // String length. |
| 1533 | Ty = getTypes().ConvertType(getContext().LongTy); |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1534 | Fields[3] = llvm::ConstantInt::get(Ty, StringLength); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1535 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1536 | // The struct. |
Owen Anderson | 08e2524 | 2009-07-27 22:29:56 +0000 | [diff] [blame] | 1537 | C = llvm::ConstantStruct::get(STy, Fields); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1538 | GV = new llvm::GlobalVariable(getModule(), C->getType(), true, |
| 1539 | llvm::GlobalVariable::PrivateLinkage, C, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1540 | "_unnamed_cfstring_"); |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1541 | if (const char *Sect = getContext().Target.getCFStringSection()) |
| 1542 | GV->setSection(Sect); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1543 | Entry.setValue(GV); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1544 | |
Anders Carlsson | 0c67829 | 2007-11-01 00:41:52 +0000 | [diff] [blame] | 1545 | return GV; |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1546 | } |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1547 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1548 | /// GetStringForStringLiteral - Return the appropriate bytes for a |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1549 | /// string literal, properly padded to match the literal type. |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1550 | std::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1551 | const char *StrData = E->getStrData(); |
| 1552 | unsigned Len = E->getByteLength(); |
| 1553 | |
| 1554 | const ConstantArrayType *CAT = |
| 1555 | getContext().getAsConstantArrayType(E->getType()); |
| 1556 | assert(CAT && "String isn't pointer or array!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1557 | |
Chris Lattner | dbb1ecc | 2009-02-26 23:01:51 +0000 | [diff] [blame] | 1558 | // Resize the string to the right size. |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1559 | std::string Str(StrData, StrData+Len); |
| 1560 | uint64_t RealLen = CAT->getSize().getZExtValue(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1561 | |
Chris Lattner | dbb1ecc | 2009-02-26 23:01:51 +0000 | [diff] [blame] | 1562 | if (E->isWide()) |
| 1563 | RealLen *= getContext().Target.getWCharWidth()/8; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1564 | |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1565 | Str.resize(RealLen, '\0'); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1566 | |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1567 | return Str; |
| 1568 | } |
| 1569 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1570 | /// GetAddrOfConstantStringFromLiteral - Return a pointer to a |
| 1571 | /// constant array for the given string literal. |
| 1572 | llvm::Constant * |
| 1573 | CodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { |
| 1574 | // FIXME: This can be more efficient. |
Eli Friedman | 7eb79c1 | 2009-11-16 05:55:46 +0000 | [diff] [blame] | 1575 | // FIXME: We shouldn't need to bitcast the constant in the wide string case. |
| 1576 | llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); |
| 1577 | if (S->isWide()) { |
| 1578 | llvm::Type *DestTy = |
| 1579 | llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); |
| 1580 | C = llvm::ConstantExpr::getBitCast(C, DestTy); |
| 1581 | } |
| 1582 | return C; |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1583 | } |
| 1584 | |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1585 | /// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant |
| 1586 | /// array for the given ObjCEncodeExpr node. |
| 1587 | llvm::Constant * |
| 1588 | CodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { |
| 1589 | std::string Str; |
| 1590 | getContext().getObjCEncodingForType(E->getEncodedType(), Str); |
Eli Friedman | a210f35 | 2009-03-07 20:17:55 +0000 | [diff] [blame] | 1591 | |
| 1592 | return GetAddrOfConstantCString(Str); |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1593 | } |
| 1594 | |
| 1595 | |
Chris Lattner | a7ad98f | 2008-02-11 00:02:17 +0000 | [diff] [blame] | 1596 | /// GenerateWritableString -- Creates storage for a string literal. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1597 | static llvm::Constant *GenerateStringLiteral(const std::string &str, |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1598 | bool constant, |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1599 | CodeGenModule &CGM, |
| 1600 | const char *GlobalName) { |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1601 | // Create Constant for this string literal. Don't add a '\0'. |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1602 | llvm::Constant *C = |
| 1603 | llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1604 | |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1605 | // Create a global variable for this string |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1606 | return new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1607 | llvm::GlobalValue::PrivateLinkage, |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 1608 | C, GlobalName); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1609 | } |
| 1610 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1611 | /// GetAddrOfConstantString - Returns a pointer to a character array |
| 1612 | /// containing the literal. This contents are exactly that of the |
| 1613 | /// given string, i.e. it will not be null terminated automatically; |
| 1614 | /// see GetAddrOfConstantCString. Note that whether the result is |
| 1615 | /// actually a pointer to an LLVM constant depends on |
| 1616 | /// Feature.WriteableStrings. |
| 1617 | /// |
| 1618 | /// The result has pointer to array type. |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1619 | llvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, |
| 1620 | const char *GlobalName) { |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1621 | bool IsConstant = !Features.WritableStrings; |
| 1622 | |
| 1623 | // Get the default prefix if a name wasn't specified. |
| 1624 | if (!GlobalName) |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1625 | GlobalName = ".str"; |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1626 | |
| 1627 | // Don't share any string literals if strings aren't constant. |
| 1628 | if (!IsConstant) |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1629 | return GenerateStringLiteral(str, false, *this, GlobalName); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1630 | |
| 1631 | llvm::StringMapEntry<llvm::Constant *> &Entry = |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1632 | ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1633 | |
| 1634 | if (Entry.getValue()) |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1635 | return Entry.getValue(); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1636 | |
| 1637 | // Create a global variable for this. |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1638 | llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1639 | Entry.setValue(C); |
| 1640 | return C; |
| 1641 | } |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1642 | |
| 1643 | /// GetAddrOfConstantCString - Returns a pointer to a character |
| 1644 | /// array containing the literal and a terminating '\-' |
| 1645 | /// character. The result has pointer to array type. |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1646 | llvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, |
| 1647 | const char *GlobalName){ |
Chris Lattner | c9f29c6 | 2008-12-09 19:10:54 +0000 | [diff] [blame] | 1648 | return GetAddrOfConstantString(str + '\0', GlobalName); |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1649 | } |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1650 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1651 | /// EmitObjCPropertyImplementations - Emit information for synthesized |
| 1652 | /// properties for an implementation. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1653 | void CodeGenModule::EmitObjCPropertyImplementations(const |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1654 | ObjCImplementationDecl *D) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1655 | for (ObjCImplementationDecl::propimpl_iterator |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1656 | i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1657 | ObjCPropertyImplDecl *PID = *i; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1658 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1659 | // Dynamic is just for type-checking. |
| 1660 | if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { |
| 1661 | ObjCPropertyDecl *PD = PID->getPropertyDecl(); |
| 1662 | |
| 1663 | // Determine which methods need to be implemented, some may have |
| 1664 | // been overridden. Note that ::isSynthesized is not the method |
| 1665 | // we want, that just indicates if the decl came from a |
| 1666 | // property. What we want to know is if the method is defined in |
| 1667 | // this implementation. |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1668 | if (!D->getInstanceMethod(PD->getGetterName())) |
Fariborz Jahanian | fef30b5 | 2008-12-09 20:23:04 +0000 | [diff] [blame] | 1669 | CodeGenFunction(*this).GenerateObjCGetter( |
| 1670 | const_cast<ObjCImplementationDecl *>(D), PID); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1671 | if (!PD->isReadOnly() && |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1672 | !D->getInstanceMethod(PD->getSetterName())) |
Fariborz Jahanian | fef30b5 | 2008-12-09 20:23:04 +0000 | [diff] [blame] | 1673 | CodeGenFunction(*this).GenerateObjCSetter( |
| 1674 | const_cast<ObjCImplementationDecl *>(D), PID); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1675 | } |
| 1676 | } |
| 1677 | } |
| 1678 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1679 | /// EmitNamespace - Emit all declarations in a namespace. |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 1680 | void CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1681 | for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 1682 | I != E; ++I) |
| 1683 | EmitTopLevelDecl(*I); |
| 1684 | } |
| 1685 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1686 | // EmitLinkageSpec - Emit all declarations in a linkage spec. |
| 1687 | void CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { |
Eli Friedman | f976be8 | 2009-08-01 20:48:04 +0000 | [diff] [blame] | 1688 | if (LSD->getLanguage() != LinkageSpecDecl::lang_c && |
| 1689 | LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1690 | ErrorUnsupported(LSD, "linkage spec"); |
| 1691 | return; |
| 1692 | } |
| 1693 | |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1694 | for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1695 | I != E; ++I) |
| 1696 | EmitTopLevelDecl(*I); |
| 1697 | } |
| 1698 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1699 | /// EmitTopLevelDecl - Emit code for a single top level declaration. |
| 1700 | void CodeGenModule::EmitTopLevelDecl(Decl *D) { |
| 1701 | // If an error has occurred, stop code generation, but continue |
| 1702 | // parsing and semantic analysis (to ensure all warnings and errors |
| 1703 | // are emitted). |
| 1704 | if (Diags.hasErrorOccurred()) |
| 1705 | return; |
| 1706 | |
Douglas Gregor | 16e8be2 | 2009-06-29 17:30:29 +0000 | [diff] [blame] | 1707 | // Ignore dependent declarations. |
| 1708 | if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) |
| 1709 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1710 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1711 | switch (D->getKind()) { |
Anders Carlsson | 293361a | 2009-08-25 13:14:46 +0000 | [diff] [blame] | 1712 | case Decl::CXXConversion: |
Anders Carlsson | 2b77ba8 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 1713 | case Decl::CXXMethod: |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1714 | case Decl::Function: |
Douglas Gregor | 16e8be2 | 2009-06-29 17:30:29 +0000 | [diff] [blame] | 1715 | // Skip function templates |
| 1716 | if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) |
| 1717 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1718 | |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 1719 | EmitGlobal(cast<FunctionDecl>(D)); |
| 1720 | break; |
| 1721 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1722 | case Decl::Var: |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 1723 | EmitGlobal(cast<VarDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1724 | break; |
| 1725 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1726 | // C++ Decls |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1727 | case Decl::Namespace: |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 1728 | EmitNamespace(cast<NamespaceDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1729 | break; |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 1730 | // No code generation needed. |
John McCall | 9d0c661 | 2009-11-17 09:33:40 +0000 | [diff] [blame] | 1731 | case Decl::UsingShadow: |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 1732 | case Decl::Using: |
Douglas Gregor | dd9967a | 2009-09-02 23:49:23 +0000 | [diff] [blame] | 1733 | case Decl::UsingDirective: |
Douglas Gregor | 127102b | 2009-06-29 20:59:39 +0000 | [diff] [blame] | 1734 | case Decl::ClassTemplate: |
| 1735 | case Decl::FunctionTemplate: |
Anders Carlsson | 018837b | 2009-09-23 19:19:16 +0000 | [diff] [blame] | 1736 | case Decl::NamespaceAlias: |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 1737 | break; |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1738 | case Decl::CXXConstructor: |
| 1739 | EmitCXXConstructors(cast<CXXConstructorDecl>(D)); |
| 1740 | break; |
Anders Carlsson | 27ae536 | 2009-04-17 01:58:57 +0000 | [diff] [blame] | 1741 | case Decl::CXXDestructor: |
| 1742 | EmitCXXDestructors(cast<CXXDestructorDecl>(D)); |
| 1743 | break; |
Anders Carlsson | 36674d2 | 2009-06-11 21:22:55 +0000 | [diff] [blame] | 1744 | |
| 1745 | case Decl::StaticAssert: |
| 1746 | // Nothing to do. |
| 1747 | break; |
| 1748 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1749 | // Objective-C Decls |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1750 | |
Fariborz Jahanian | 38e24c7 | 2009-03-18 22:33:24 +0000 | [diff] [blame] | 1751 | // Forward declarations, no (immediate) code generation. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1752 | case Decl::ObjCClass: |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1753 | case Decl::ObjCForwardProtocol: |
Fariborz Jahanian | b31cb7f | 2009-03-21 18:06:45 +0000 | [diff] [blame] | 1754 | case Decl::ObjCCategory: |
Chris Lattner | 285d0db | 2009-04-01 02:36:43 +0000 | [diff] [blame] | 1755 | case Decl::ObjCInterface: |
Chris Lattner | 285d0db | 2009-04-01 02:36:43 +0000 | [diff] [blame] | 1756 | break; |
| 1757 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1758 | case Decl::ObjCProtocol: |
Fariborz Jahanian | b31cb7f | 2009-03-21 18:06:45 +0000 | [diff] [blame] | 1759 | Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1760 | break; |
| 1761 | |
| 1762 | case Decl::ObjCCategoryImpl: |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1763 | // Categories have properties but don't support synthesize so we |
| 1764 | // can ignore them here. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1765 | Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); |
| 1766 | break; |
| 1767 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1768 | case Decl::ObjCImplementation: { |
| 1769 | ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); |
| 1770 | EmitObjCPropertyImplementations(OMD); |
| 1771 | Runtime->GenerateClass(OMD); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1772 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1773 | } |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1774 | case Decl::ObjCMethod: { |
| 1775 | ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); |
| 1776 | // If this is not a prototype, emit the body. |
Argyrios Kyrtzidis | 6fb0aee | 2009-06-30 02:35:26 +0000 | [diff] [blame] | 1777 | if (OMD->getBody()) |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1778 | CodeGenFunction(*this).GenerateObjCMethod(OMD); |
| 1779 | break; |
| 1780 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1781 | case Decl::ObjCCompatibleAlias: |
Fariborz Jahanian | 305c658 | 2009-01-08 01:10:55 +0000 | [diff] [blame] | 1782 | // compatibility-alias is a directive and has no code gen. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1783 | break; |
| 1784 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1785 | case Decl::LinkageSpec: |
| 1786 | EmitLinkageSpec(cast<LinkageSpecDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1787 | break; |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1788 | |
| 1789 | case Decl::FileScopeAsm: { |
| 1790 | FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); |
| 1791 | std::string AsmString(AD->getAsmString()->getStrData(), |
| 1792 | AD->getAsmString()->getByteLength()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1793 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1794 | const std::string &S = getModule().getModuleInlineAsm(); |
| 1795 | if (S.empty()) |
| 1796 | getModule().setModuleInlineAsm(AsmString); |
| 1797 | else |
| 1798 | getModule().setModuleInlineAsm(S + '\n' + AsmString); |
| 1799 | break; |
| 1800 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1801 | |
| 1802 | default: |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 1803 | // Make sure we handled everything we should, every other kind is a |
| 1804 | // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind |
| 1805 | // function. Need to recode Decl::Kind to do that easily. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1806 | assert(isa<TypeDecl>(D) && "Unsupported decl kind"); |
| 1807 | } |
| 1808 | } |