Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- CodeGenModule.cpp - Emit LLVM Code from ASTs for a Module --------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 0bc735f | 2007-12-29 19:59:25 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This coordinates the per-module state used while generating code. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "CodeGenModule.h" |
Chris Lattner | bd36064 | 2009-03-26 05:00:52 +0000 | [diff] [blame] | 15 | #include "CGDebugInfo.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 16 | #include "CodeGenFunction.h" |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 17 | #include "CGCall.h" |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 18 | #include "CGObjCRuntime.h" |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 19 | #include "Mangle.h" |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 20 | #include "TargetInfo.h" |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 21 | #include "clang/CodeGen/CodeGenOptions.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 22 | #include "clang/AST/ASTContext.h" |
Ken Dyck | 687cc4a | 2010-01-26 13:48:07 +0000 | [diff] [blame] | 23 | #include "clang/AST/CharUnits.h" |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 24 | #include "clang/AST/DeclObjC.h" |
Chris Lattner | 21ef7ae | 2008-11-04 16:51:42 +0000 | [diff] [blame] | 25 | #include "clang/AST/DeclCXX.h" |
Anders Carlsson | 1a5e0d7 | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 26 | #include "clang/AST/RecordLayout.h" |
Chris Lattner | 1b63e4f | 2009-06-14 01:54:56 +0000 | [diff] [blame] | 27 | #include "clang/Basic/Builtins.h" |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 28 | #include "clang/Basic/Diagnostic.h" |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 29 | #include "clang/Basic/SourceManager.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 30 | #include "clang/Basic/TargetInfo.h" |
Steve Naroff | e9b7d8a | 2009-04-01 15:50:34 +0000 | [diff] [blame] | 31 | #include "clang/Basic/ConvertUTF.h" |
Nate Begeman | ec9426c | 2008-03-09 03:09:36 +0000 | [diff] [blame] | 32 | #include "llvm/CallingConv.h" |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 33 | #include "llvm/Module.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 34 | #include "llvm/Intrinsics.h" |
Chris Lattner | d5b8902 | 2009-12-28 21:44:41 +0000 | [diff] [blame] | 35 | #include "llvm/LLVMContext.h" |
John McCall | 6374c33 | 2010-03-06 00:35:14 +0000 | [diff] [blame] | 36 | #include "llvm/ADT/Triple.h" |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 37 | #include "llvm/Target/TargetData.h" |
Chris Lattner | 78f7ece | 2009-11-07 09:22:46 +0000 | [diff] [blame] | 38 | #include "llvm/Support/ErrorHandling.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 39 | using namespace clang; |
| 40 | using namespace CodeGen; |
| 41 | |
| 42 | |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 43 | CodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, |
John McCall | 468ec6c | 2010-03-04 04:29:44 +0000 | [diff] [blame] | 44 | llvm::Module &M, const llvm::TargetData &TD, |
| 45 | Diagnostic &diags) |
Chris Lattner | bd36064 | 2009-03-26 05:00:52 +0000 | [diff] [blame] | 46 | : BlockModule(C, M, TD, Types, *this), Context(C), |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 47 | Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), |
John McCall | 468ec6c | 2010-03-04 04:29:44 +0000 | [diff] [blame] | 48 | TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags), |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 49 | Types(C, M, TD, getTargetCodeGenInfo().getABIInfo()), |
| 50 | MangleCtx(C), VtableInfo(*this), Runtime(0), |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 51 | MemCpyFn(0), MemMoveFn(0), MemSetFn(0), CFConstantStringClassRef(0), |
| 52 | VMContext(M.getContext()) { |
Daniel Dunbar | 208ff5e | 2008-08-11 18:12:00 +0000 | [diff] [blame] | 53 | |
Chris Lattner | 3c8f153 | 2009-03-21 07:12:05 +0000 | [diff] [blame] | 54 | if (!Features.ObjC1) |
| 55 | Runtime = 0; |
| 56 | else if (!Features.NeXTRuntime) |
| 57 | Runtime = CreateGNUObjCRuntime(*this); |
| 58 | else if (Features.ObjCNonFragileABI) |
| 59 | Runtime = CreateMacNonFragileABIObjCRuntime(*this); |
| 60 | else |
| 61 | Runtime = CreateMacObjCRuntime(*this); |
Sanjiv Gupta | e8b9f5b | 2008-05-08 08:54:20 +0000 | [diff] [blame] | 62 | |
| 63 | // If debug info generation is enabled, create the CGDebugInfo object. |
Anders Carlsson | 20f12a2 | 2009-12-06 18:00:51 +0000 | [diff] [blame] | 64 | DebugInfo = CodeGenOpts.DebugInfo ? new CGDebugInfo(*this) : 0; |
Chris Lattner | 2b94fe3 | 2008-03-01 08:45:05 +0000 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | CodeGenModule::~CodeGenModule() { |
Ted Kremenek | 815c78f | 2008-08-05 18:50:11 +0000 | [diff] [blame] | 68 | delete Runtime; |
| 69 | delete DebugInfo; |
| 70 | } |
| 71 | |
David Chisnall | 0d13f6f | 2010-01-23 02:40:42 +0000 | [diff] [blame] | 72 | void CodeGenModule::createObjCRuntime() { |
| 73 | if (!Features.NeXTRuntime) |
| 74 | Runtime = CreateGNUObjCRuntime(*this); |
| 75 | else if (Features.ObjCNonFragileABI) |
| 76 | Runtime = CreateMacNonFragileABIObjCRuntime(*this); |
| 77 | else |
| 78 | Runtime = CreateMacObjCRuntime(*this); |
| 79 | } |
| 80 | |
Ted Kremenek | 815c78f | 2008-08-05 18:50:11 +0000 | [diff] [blame] | 81 | void CodeGenModule::Release() { |
Chris Lattner | 82227ff | 2009-03-22 21:21:57 +0000 | [diff] [blame] | 82 | EmitDeferred(); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 83 | EmitCXXGlobalInitFunc(); |
Daniel Dunbar | 208ff5e | 2008-08-11 18:12:00 +0000 | [diff] [blame] | 84 | if (Runtime) |
| 85 | if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) |
| 86 | AddGlobalCtor(ObjCInitFunction); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 87 | EmitCtorList(GlobalCtors, "llvm.global_ctors"); |
| 88 | EmitCtorList(GlobalDtors, "llvm.global_dtors"); |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 89 | EmitAnnotations(); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 90 | EmitLLVMUsed(); |
Daniel Dunbar | f1968f2 | 2008-10-01 00:49:24 +0000 | [diff] [blame] | 91 | } |
| 92 | |
John McCall | 6374c33 | 2010-03-06 00:35:14 +0000 | [diff] [blame] | 93 | bool CodeGenModule::isTargetDarwin() const { |
| 94 | return getContext().Target.getTriple().getOS() == llvm::Triple::Darwin; |
| 95 | } |
| 96 | |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 97 | /// ErrorUnsupported - Print out an error that codegen doesn't support the |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 98 | /// specified stmt yet. |
Daniel Dunbar | 90df4b6 | 2008-09-04 03:43:08 +0000 | [diff] [blame] | 99 | void CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, |
| 100 | bool OmitOnError) { |
| 101 | if (OmitOnError && getDiags().hasErrorOccurred()) |
| 102 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 103 | unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, |
Daniel Dunbar | 56b8001 | 2009-02-06 19:18:03 +0000 | [diff] [blame] | 104 | "cannot compile this %0 yet"); |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 105 | std::string Msg = Type; |
Chris Lattner | 0a14eee | 2008-11-18 07:04:44 +0000 | [diff] [blame] | 106 | getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) |
| 107 | << Msg << S->getSourceRange(); |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 108 | } |
Chris Lattner | 58c3f9e | 2007-12-02 06:27:33 +0000 | [diff] [blame] | 109 | |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 110 | /// ErrorUnsupported - Print out an error that codegen doesn't support the |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 111 | /// specified decl yet. |
Daniel Dunbar | 90df4b6 | 2008-09-04 03:43:08 +0000 | [diff] [blame] | 112 | void CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, |
| 113 | bool OmitOnError) { |
| 114 | if (OmitOnError && getDiags().hasErrorOccurred()) |
| 115 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 116 | unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, |
Daniel Dunbar | 56b8001 | 2009-02-06 19:18:03 +0000 | [diff] [blame] | 117 | "cannot compile this %0 yet"); |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 118 | std::string Msg = Type; |
Chris Lattner | 0a14eee | 2008-11-18 07:04:44 +0000 | [diff] [blame] | 119 | getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 120 | } |
| 121 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 122 | LangOptions::VisibilityMode |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 123 | CodeGenModule::getDeclVisibilityMode(const Decl *D) const { |
| 124 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) |
| 125 | if (VD->getStorageClass() == VarDecl::PrivateExtern) |
| 126 | return LangOptions::Hidden; |
| 127 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 128 | if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) { |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 129 | switch (attr->getVisibility()) { |
| 130 | default: assert(0 && "Unknown visibility!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 131 | case VisibilityAttr::DefaultVisibility: |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 132 | return LangOptions::Default; |
| 133 | case VisibilityAttr::HiddenVisibility: |
| 134 | return LangOptions::Hidden; |
| 135 | case VisibilityAttr::ProtectedVisibility: |
| 136 | return LangOptions::Protected; |
| 137 | } |
| 138 | } |
| 139 | |
Anders Carlsson | 39de84d | 2010-02-07 01:44:36 +0000 | [diff] [blame] | 140 | // This decl should have the same visibility as its parent. |
| 141 | if (const DeclContext *DC = D->getDeclContext()) |
| 142 | return getDeclVisibilityMode(cast<Decl>(DC)); |
| 143 | |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 144 | return getLangOptions().getVisibilityMode(); |
| 145 | } |
| 146 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 147 | void CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 148 | const Decl *D) const { |
| 149 | // Internal definitions always have default visibility. |
Chris Lattner | df102fc | 2009-04-14 05:27:13 +0000 | [diff] [blame] | 150 | if (GV->hasLocalLinkage()) { |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 151 | GV->setVisibility(llvm::GlobalValue::DefaultVisibility); |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 152 | return; |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 153 | } |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 154 | |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 155 | switch (getDeclVisibilityMode(D)) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 156 | default: assert(0 && "Unknown visibility!"); |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 157 | case LangOptions::Default: |
| 158 | return GV->setVisibility(llvm::GlobalValue::DefaultVisibility); |
| 159 | case LangOptions::Hidden: |
| 160 | return GV->setVisibility(llvm::GlobalValue::HiddenVisibility); |
| 161 | case LangOptions::Protected: |
| 162 | return GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 163 | } |
| 164 | } |
| 165 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 166 | void CodeGenModule::getMangledName(MangleBuffer &Buffer, GlobalDecl GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 167 | const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 168 | |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 169 | if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 170 | return getMangledCXXCtorName(Buffer, D, GD.getCtorType()); |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 171 | if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 172 | return getMangledCXXDtorName(Buffer, D, GD.getDtorType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 173 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 174 | return getMangledName(Buffer, ND); |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 175 | } |
| 176 | |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 177 | /// \brief Retrieves the mangled name for the given declaration. |
| 178 | /// |
| 179 | /// If the given declaration requires a mangled name, returns an |
Chris Lattner | c50689b | 2009-03-21 06:31:09 +0000 | [diff] [blame] | 180 | /// const char* containing the mangled name. Otherwise, returns |
| 181 | /// the unmangled name. |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 182 | /// |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 183 | void CodeGenModule::getMangledName(MangleBuffer &Buffer, |
| 184 | const NamedDecl *ND) { |
Daniel Dunbar | f981bf8 | 2009-11-21 09:14:52 +0000 | [diff] [blame] | 185 | if (!getMangleContext().shouldMangleDeclName(ND)) { |
Chris Lattner | c50689b | 2009-03-21 06:31:09 +0000 | [diff] [blame] | 186 | assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 187 | Buffer.setString(ND->getNameAsCString()); |
| 188 | return; |
Chris Lattner | c50689b | 2009-03-21 06:31:09 +0000 | [diff] [blame] | 189 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 190 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 191 | getMangleContext().mangleName(ND, Buffer.getBuffer()); |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 192 | } |
| 193 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 194 | llvm::GlobalValue *CodeGenModule::GetGlobalValue(llvm::StringRef Name) { |
| 195 | return getModule().getNamedValue(Name); |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 196 | } |
| 197 | |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 198 | /// AddGlobalCtor - Add a function to the list that will be called before |
| 199 | /// main() runs. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 200 | void CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 201 | // FIXME: Type coercion of void()* types. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 202 | GlobalCtors.push_back(std::make_pair(Ctor, Priority)); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 203 | } |
| 204 | |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 205 | /// AddGlobalDtor - Add a function to the list that will be called |
| 206 | /// when the module is unloaded. |
| 207 | void CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 208 | // FIXME: Type coercion of void()* types. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 209 | GlobalDtors.push_back(std::make_pair(Dtor, Priority)); |
| 210 | } |
| 211 | |
| 212 | void CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { |
| 213 | // Ctor function type is void()*. |
| 214 | llvm::FunctionType* CtorFTy = |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 215 | llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 216 | std::vector<const llvm::Type*>(), |
| 217 | false); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 218 | llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 219 | |
| 220 | // Get the type of a ctor entry, { i32, void ()* }. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 221 | llvm::StructType* CtorStructTy = |
| 222 | llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 223 | llvm::PointerType::getUnqual(CtorFTy), NULL); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 224 | |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 225 | // Construct the constructor and destructor arrays. |
| 226 | std::vector<llvm::Constant*> Ctors; |
| 227 | for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { |
| 228 | std::vector<llvm::Constant*> S; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 229 | S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 230 | I->second, false)); |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 231 | S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); |
Owen Anderson | 08e2524 | 2009-07-27 22:29:56 +0000 | [diff] [blame] | 232 | Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 233 | } |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 234 | |
| 235 | if (!Ctors.empty()) { |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 236 | llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 237 | new llvm::GlobalVariable(TheModule, AT, false, |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 238 | llvm::GlobalValue::AppendingLinkage, |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 239 | llvm::ConstantArray::get(AT, Ctors), |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 240 | GlobalName); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 241 | } |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 242 | } |
| 243 | |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 244 | void CodeGenModule::EmitAnnotations() { |
| 245 | if (Annotations.empty()) |
| 246 | return; |
| 247 | |
| 248 | // Create a new global variable for the ConstantStruct in the Module. |
| 249 | llvm::Constant *Array = |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 250 | llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 251 | Annotations.size()), |
| 252 | Annotations); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 253 | llvm::GlobalValue *gv = |
| 254 | new llvm::GlobalVariable(TheModule, Array->getType(), false, |
| 255 | llvm::GlobalValue::AppendingLinkage, Array, |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 256 | "llvm.global.annotations"); |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 257 | gv->setSection("llvm.metadata"); |
| 258 | } |
| 259 | |
Chris Lattner | 86daeee | 2009-04-14 16:44:36 +0000 | [diff] [blame] | 260 | static CodeGenModule::GVALinkage |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 261 | GetLinkageForFunction(ASTContext &Context, const FunctionDecl *FD, |
Douglas Gregor | 68584ed | 2009-06-18 16:11:24 +0000 | [diff] [blame] | 262 | const LangOptions &Features) { |
Douglas Gregor | 1fd2dd1 | 2009-06-29 22:39:32 +0000 | [diff] [blame] | 263 | CodeGenModule::GVALinkage External = CodeGenModule::GVA_StrongExternal; |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 264 | |
| 265 | Linkage L = FD->getLinkage(); |
| 266 | if (L == ExternalLinkage && Context.getLangOptions().CPlusPlus && |
| 267 | FD->getType()->getLinkage() == UniqueExternalLinkage) |
| 268 | L = UniqueExternalLinkage; |
| 269 | |
| 270 | switch (L) { |
| 271 | case NoLinkage: |
| 272 | case InternalLinkage: |
| 273 | case UniqueExternalLinkage: |
| 274 | return CodeGenModule::GVA_Internal; |
Anders Carlsson | 548e60e | 2009-12-10 22:25:34 +0000 | [diff] [blame] | 275 | |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 276 | case ExternalLinkage: |
| 277 | switch (FD->getTemplateSpecializationKind()) { |
| 278 | case TSK_Undeclared: |
| 279 | case TSK_ExplicitSpecialization: |
| 280 | External = CodeGenModule::GVA_StrongExternal; |
| 281 | break; |
| 282 | |
| 283 | case TSK_ExplicitInstantiationDefinition: |
Douglas Gregor | 8f51a4f | 2010-03-13 18:23:07 +0000 | [diff] [blame] | 284 | return CodeGenModule::GVA_ExplicitTemplateInstantiation; |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 285 | |
| 286 | case TSK_ExplicitInstantiationDeclaration: |
| 287 | case TSK_ImplicitInstantiation: |
Anders Carlsson | 548e60e | 2009-12-10 22:25:34 +0000 | [diff] [blame] | 288 | External = CodeGenModule::GVA_TemplateInstantiation; |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 289 | break; |
| 290 | } |
Anders Carlsson | 548e60e | 2009-12-10 22:25:34 +0000 | [diff] [blame] | 291 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 292 | |
Douglas Gregor | 7ced9c8 | 2009-10-27 21:11:48 +0000 | [diff] [blame] | 293 | if (!FD->isInlined()) |
Douglas Gregor | 1fd2dd1 | 2009-06-29 22:39:32 +0000 | [diff] [blame] | 294 | return External; |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 295 | |
Douglas Gregor | 1fc09a9 | 2009-09-13 07:46:26 +0000 | [diff] [blame] | 296 | if (!Features.CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { |
| 297 | // GNU or C99 inline semantics. Determine whether this symbol should be |
| 298 | // externally visible. |
| 299 | if (FD->isInlineDefinitionExternallyVisible()) |
| 300 | return External; |
| 301 | |
| 302 | // C99 inline semantics, where the symbol is not externally visible. |
| 303 | return CodeGenModule::GVA_C99Inline; |
Chris Lattner | d55a71d | 2009-04-22 00:03:30 +0000 | [diff] [blame] | 304 | } |
Chris Lattner | cbb8fc1 | 2009-04-14 20:25:53 +0000 | [diff] [blame] | 305 | |
Douglas Gregor | 7d9c3c9 | 2009-10-27 23:26:40 +0000 | [diff] [blame] | 306 | // C++0x [temp.explicit]p9: |
| 307 | // [ Note: The intent is that an inline function that is the subject of |
| 308 | // an explicit instantiation declaration will still be implicitly |
| 309 | // instantiated when used so that the body can be considered for |
| 310 | // inlining, but that no out-of-line copy of the inline function would be |
| 311 | // generated in the translation unit. -- end note ] |
| 312 | if (FD->getTemplateSpecializationKind() |
| 313 | == TSK_ExplicitInstantiationDeclaration) |
| 314 | return CodeGenModule::GVA_C99Inline; |
| 315 | |
Douglas Gregor | 1fc09a9 | 2009-09-13 07:46:26 +0000 | [diff] [blame] | 316 | return CodeGenModule::GVA_CXXInline; |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 317 | } |
| 318 | |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 319 | llvm::GlobalValue::LinkageTypes |
| 320 | CodeGenModule::getFunctionLinkage(const FunctionDecl *D) { |
Douglas Gregor | 68584ed | 2009-06-18 16:11:24 +0000 | [diff] [blame] | 321 | GVALinkage Linkage = GetLinkageForFunction(getContext(), D, Features); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 322 | |
Daniel Dunbar | 55d6f50 | 2009-04-14 07:19:20 +0000 | [diff] [blame] | 323 | if (Linkage == GVA_Internal) { |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 324 | return llvm::Function::InternalLinkage; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 325 | } else if (D->hasAttr<DLLExportAttr>()) { |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 326 | return llvm::Function::DLLExportLinkage; |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 327 | } else if (D->hasAttr<WeakAttr>()) { |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 328 | return llvm::Function::WeakAnyLinkage; |
Chris Lattner | cbb8fc1 | 2009-04-14 20:25:53 +0000 | [diff] [blame] | 329 | } else if (Linkage == GVA_C99Inline) { |
| 330 | // In C99 mode, 'inline' functions are guaranteed to have a strong |
| 331 | // definition somewhere else, so we can use available_externally linkage. |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 332 | return llvm::Function::AvailableExternallyLinkage; |
Douglas Gregor | 34fd284 | 2010-03-13 03:49:57 +0000 | [diff] [blame] | 333 | } else if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) { |
Chris Lattner | 86daeee | 2009-04-14 16:44:36 +0000 | [diff] [blame] | 334 | // In C++, the compiler has to emit a definition in every translation unit |
| 335 | // that references the function. We should use linkonce_odr because |
| 336 | // a) if all references in this translation unit are optimized away, we |
| 337 | // don't need to codegen it. b) if the function persists, it needs to be |
| 338 | // merged with other definitions. c) C++ has the ODR, so we know the |
| 339 | // definition is dependable. |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 340 | return llvm::Function::LinkOnceODRLinkage; |
Douglas Gregor | 8f51a4f | 2010-03-13 18:23:07 +0000 | [diff] [blame] | 341 | } else if (Linkage == GVA_ExplicitTemplateInstantiation) { |
| 342 | // An explicit instantiation of a template has weak linkage, since |
| 343 | // explicit instantiations can occur in multiple translation units |
| 344 | // and must all be equivalent. However, we are not allowed to |
| 345 | // throw away these explicit instantiations. |
| 346 | return llvm::Function::WeakODRLinkage; |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 347 | } else { |
Chris Lattner | cbb8fc1 | 2009-04-14 20:25:53 +0000 | [diff] [blame] | 348 | assert(Linkage == GVA_StrongExternal); |
| 349 | // Otherwise, we have strong external linkage. |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 350 | return llvm::Function::ExternalLinkage; |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 351 | } |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 352 | } |
Nuno Lopes | d4cbda6 | 2008-06-08 15:45:52 +0000 | [diff] [blame] | 353 | |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 354 | |
| 355 | /// SetFunctionDefinitionAttributes - Set attributes for a global. |
| 356 | /// |
| 357 | /// FIXME: This is currently only done for aliases and functions, but not for |
| 358 | /// variables (these details are set in EmitGlobalVarDefinition for variables). |
| 359 | void CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, |
| 360 | llvm::GlobalValue *GV) { |
| 361 | GV->setLinkage(getFunctionLinkage(D)); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 362 | SetCommonAttributes(D, GV); |
Nuno Lopes | d4cbda6 | 2008-06-08 15:45:52 +0000 | [diff] [blame] | 363 | } |
| 364 | |
Daniel Dunbar | 7dbd819 | 2009-04-14 07:08:30 +0000 | [diff] [blame] | 365 | void CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 366 | const CGFunctionInfo &Info, |
Daniel Dunbar | 7dbd819 | 2009-04-14 07:08:30 +0000 | [diff] [blame] | 367 | llvm::Function *F) { |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 368 | unsigned CallingConv; |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 369 | AttributeListType AttributeList; |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 370 | ConstructAttributeList(Info, D, AttributeList, CallingConv); |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 371 | F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 372 | AttributeList.size())); |
| 373 | F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 374 | } |
| 375 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 376 | void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, |
| 377 | llvm::Function *F) { |
Daniel Dunbar | 74ac74a | 2009-03-02 04:58:03 +0000 | [diff] [blame] | 378 | if (!Features.Exceptions && !Features.ObjCNonFragileABI) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 379 | F->addFnAttr(llvm::Attribute::NoUnwind); |
Daniel Dunbar | af668b0 | 2008-10-28 00:17:57 +0000 | [diff] [blame] | 380 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 381 | if (D->hasAttr<AlwaysInlineAttr>()) |
Daniel Dunbar | af668b0 | 2008-10-28 00:17:57 +0000 | [diff] [blame] | 382 | F->addFnAttr(llvm::Attribute::AlwaysInline); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 383 | |
Mike Stump | 1feade8 | 2009-08-26 22:31:08 +0000 | [diff] [blame] | 384 | if (D->hasAttr<NoInlineAttr>()) |
Anders Carlsson | 81ebbde | 2009-02-19 19:22:11 +0000 | [diff] [blame] | 385 | F->addFnAttr(llvm::Attribute::NoInline); |
Mike Stump | f55314d | 2009-10-05 21:58:44 +0000 | [diff] [blame] | 386 | |
Anders Carlsson | fd01535 | 2009-11-16 16:56:03 +0000 | [diff] [blame] | 387 | if (Features.getStackProtectorMode() == LangOptions::SSPOn) |
| 388 | F->addFnAttr(llvm::Attribute::StackProtect); |
| 389 | else if (Features.getStackProtectorMode() == LangOptions::SSPReq) |
| 390 | F->addFnAttr(llvm::Attribute::StackProtectReq); |
| 391 | |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 392 | if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) { |
| 393 | unsigned width = Context.Target.getCharWidth(); |
| 394 | F->setAlignment(AA->getAlignment() / width); |
| 395 | while ((AA = AA->getNext<AlignedAttr>())) |
| 396 | F->setAlignment(std::max(F->getAlignment(), AA->getAlignment() / width)); |
| 397 | } |
Mike Stump | fb51ddf | 2009-10-05 22:49:20 +0000 | [diff] [blame] | 398 | // C++ ABI requires 2-byte alignment for member functions. |
Mike Stump | bd6dbd1 | 2009-10-05 23:08:21 +0000 | [diff] [blame] | 399 | if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) |
| 400 | F->setAlignment(2); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 401 | } |
| 402 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 403 | void CodeGenModule::SetCommonAttributes(const Decl *D, |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 404 | llvm::GlobalValue *GV) { |
| 405 | setGlobalVisibility(GV, D); |
| 406 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 407 | if (D->hasAttr<UsedAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 408 | AddUsedGlobal(GV); |
| 409 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 410 | if (const SectionAttr *SA = D->getAttr<SectionAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 411 | GV->setSection(SA->getName()); |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 412 | |
| 413 | getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 414 | } |
| 415 | |
Daniel Dunbar | 0e4f40e | 2009-04-17 00:48:04 +0000 | [diff] [blame] | 416 | void CodeGenModule::SetInternalFunctionAttributes(const Decl *D, |
| 417 | llvm::Function *F, |
| 418 | const CGFunctionInfo &FI) { |
| 419 | SetLLVMFunctionAttributes(D, FI, F); |
| 420 | SetLLVMFunctionAttributesForDefinition(D, F); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 421 | |
| 422 | F->setLinkage(llvm::Function::InternalLinkage); |
| 423 | |
Daniel Dunbar | 0e4f40e | 2009-04-17 00:48:04 +0000 | [diff] [blame] | 424 | SetCommonAttributes(D, F); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 425 | } |
| 426 | |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 427 | void CodeGenModule::SetFunctionAttributes(GlobalDecl GD, |
Eli Friedman | c6c14d1 | 2009-05-26 01:22:57 +0000 | [diff] [blame] | 428 | llvm::Function *F, |
| 429 | bool IsIncompleteFunction) { |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 430 | const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); |
| 431 | |
Eli Friedman | c6c14d1 | 2009-05-26 01:22:57 +0000 | [diff] [blame] | 432 | if (!IsIncompleteFunction) |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 433 | SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 434 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 435 | // Only a few attributes are set on declarations; these may later be |
| 436 | // overridden by a definition. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 437 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 438 | if (FD->hasAttr<DLLImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 439 | F->setLinkage(llvm::Function::DLLImportLinkage); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 440 | } else if (FD->hasAttr<WeakAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 441 | FD->hasAttr<WeakImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 442 | // "extern_weak" is overloaded in LLVM; we probably should have |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 443 | // separate linkage types for this. |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 444 | F->setLinkage(llvm::Function::ExternalWeakLinkage); |
| 445 | } else { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 446 | F->setLinkage(llvm::Function::ExternalLinkage); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 447 | } |
| 448 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 449 | if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 450 | F->setSection(SA->getName()); |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 451 | } |
| 452 | |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 453 | void CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 454 | assert(!GV->isDeclaration() && |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 455 | "Only globals with definition can force usage."); |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 456 | LLVMUsed.push_back(GV); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | void CodeGenModule::EmitLLVMUsed() { |
| 460 | // Don't create llvm.used if there is no need. |
Chris Lattner | ad64e02 | 2009-07-17 23:57:13 +0000 | [diff] [blame] | 461 | if (LLVMUsed.empty()) |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 462 | return; |
| 463 | |
Benjamin Kramer | 3c0ef8c | 2009-10-13 10:07:13 +0000 | [diff] [blame] | 464 | const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 465 | |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 466 | // Convert LLVMUsed to what ConstantArray needs. |
| 467 | std::vector<llvm::Constant*> UsedArray; |
| 468 | UsedArray.resize(LLVMUsed.size()); |
| 469 | for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 470 | UsedArray[i] = |
| 471 | llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 472 | i8PTy); |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 473 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 474 | |
Fariborz Jahanian | c38e9af | 2009-06-23 21:47:46 +0000 | [diff] [blame] | 475 | if (UsedArray.empty()) |
| 476 | return; |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 477 | llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 478 | |
| 479 | llvm::GlobalVariable *GV = |
| 480 | new llvm::GlobalVariable(getModule(), ATy, false, |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 481 | llvm::GlobalValue::AppendingLinkage, |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 482 | llvm::ConstantArray::get(ATy, UsedArray), |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 483 | "llvm.used"); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 484 | |
| 485 | GV->setSection("llvm.metadata"); |
| 486 | } |
| 487 | |
| 488 | void CodeGenModule::EmitDeferred() { |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 489 | // Emit code for any potentially referenced deferred decls. Since a |
| 490 | // previously unused static decl may become used during the generation of code |
| 491 | // for a static function, iterate until no changes are made. |
Rafael Espindola | bbf58bb | 2010-03-10 02:19:29 +0000 | [diff] [blame] | 492 | |
| 493 | while (!DeferredDeclsToEmit.empty() || !DeferredVtables.empty()) { |
| 494 | if (!DeferredVtables.empty()) { |
| 495 | const CXXRecordDecl *RD = DeferredVtables.back(); |
| 496 | DeferredVtables.pop_back(); |
| 497 | getVtableInfo().GenerateClassData(getVtableLinkage(RD), RD); |
| 498 | continue; |
| 499 | } |
| 500 | |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 501 | GlobalDecl D = DeferredDeclsToEmit.back(); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 502 | DeferredDeclsToEmit.pop_back(); |
| 503 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 504 | // Look it up to see if it was defined with a stronger definition (e.g. an |
| 505 | // extern inline function with a strong function redefinition). If so, |
| 506 | // just ignore the deferred decl. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 507 | MangleBuffer Name; |
| 508 | getMangledName(Name, D); |
| 509 | llvm::GlobalValue *CGRef = GetGlobalValue(Name); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 510 | assert(CGRef && "Deferred decl wasn't referenced?"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 511 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 512 | if (!CGRef->isDeclaration()) |
| 513 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 514 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 515 | // Otherwise, emit the definition and move on to the next one. |
| 516 | EmitGlobalDefinition(D); |
| 517 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 518 | } |
| 519 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 520 | /// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 521 | /// annotation information for a given GlobalValue. The annotation struct is |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 522 | /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the |
| 523 | /// GlobalValue being annotated. The second field is the constant string |
| 524 | /// created from the AnnotateAttr's annotation. The third field is a constant |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 525 | /// string containing the name of the translation unit. The fourth field is |
| 526 | /// the line number in the file of the annotated value declaration. |
| 527 | /// |
| 528 | /// FIXME: this does not unique the annotation string constants, as llvm-gcc |
| 529 | /// appears to. |
| 530 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 531 | llvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 532 | const AnnotateAttr *AA, |
| 533 | unsigned LineNo) { |
| 534 | llvm::Module *M = &getModule(); |
| 535 | |
| 536 | // get [N x i8] constants for the annotation string, and the filename string |
| 537 | // which are the 2nd and 3rd elements of the global annotation structure. |
Benjamin Kramer | 3c0ef8c | 2009-10-13 10:07:13 +0000 | [diff] [blame] | 538 | const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 539 | llvm::Constant *anno = llvm::ConstantArray::get(VMContext, |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 540 | AA->getAnnotation(), true); |
| 541 | llvm::Constant *unit = llvm::ConstantArray::get(VMContext, |
| 542 | M->getModuleIdentifier(), |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 543 | true); |
| 544 | |
| 545 | // Get the two global values corresponding to the ConstantArrays we just |
| 546 | // created to hold the bytes of the strings. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 547 | llvm::GlobalValue *annoGV = |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 548 | new llvm::GlobalVariable(*M, anno->getType(), false, |
| 549 | llvm::GlobalValue::PrivateLinkage, anno, |
| 550 | GV->getName()); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 551 | // translation unit name string, emitted into the llvm.metadata section. |
| 552 | llvm::GlobalValue *unitGV = |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 553 | new llvm::GlobalVariable(*M, unit->getType(), false, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 554 | llvm::GlobalValue::PrivateLinkage, unit, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 555 | ".str"); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 556 | |
Daniel Dunbar | 57d5cee | 2009-04-14 22:41:13 +0000 | [diff] [blame] | 557 | // Create the ConstantStruct for the global annotation. |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 558 | llvm::Constant *Fields[4] = { |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 559 | llvm::ConstantExpr::getBitCast(GV, SBP), |
| 560 | llvm::ConstantExpr::getBitCast(annoGV, SBP), |
| 561 | llvm::ConstantExpr::getBitCast(unitGV, SBP), |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 562 | llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 563 | }; |
Owen Anderson | 47a434f | 2009-08-05 23:18:46 +0000 | [diff] [blame] | 564 | return llvm::ConstantStruct::get(VMContext, Fields, 4, false); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 565 | } |
| 566 | |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 567 | bool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { |
Daniel Dunbar | 5c61d97 | 2009-02-13 22:08:43 +0000 | [diff] [blame] | 568 | // Never defer when EmitAllDecls is specified or the decl has |
| 569 | // attribute used. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 570 | if (Features.EmitAllDecls || Global->hasAttr<UsedAttr>()) |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 571 | return false; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 572 | |
| 573 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 574 | // Constructors and destructors should never be deferred. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 575 | if (FD->hasAttr<ConstructorAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 576 | FD->hasAttr<DestructorAttr>()) |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 577 | return false; |
| 578 | |
Eli Friedman | 61eab88 | 2009-12-08 03:56:49 +0000 | [diff] [blame] | 579 | // The key function for a class must never be deferred. |
| 580 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Global)) { |
| 581 | const CXXRecordDecl *RD = MD->getParent(); |
| 582 | if (MD->isOutOfLine() && RD->isDynamicClass()) { |
| 583 | const CXXMethodDecl *KeyFunction = getContext().getKeyFunction(RD); |
Douglas Gregor | bd6d619 | 2010-01-05 19:06:31 +0000 | [diff] [blame] | 584 | if (KeyFunction && |
| 585 | KeyFunction->getCanonicalDecl() == MD->getCanonicalDecl()) |
Eli Friedman | 61eab88 | 2009-12-08 03:56:49 +0000 | [diff] [blame] | 586 | return false; |
| 587 | } |
| 588 | } |
| 589 | |
Douglas Gregor | 68584ed | 2009-06-18 16:11:24 +0000 | [diff] [blame] | 590 | GVALinkage Linkage = GetLinkageForFunction(getContext(), FD, Features); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 591 | |
Chris Lattner | dbb5a37 | 2009-04-14 06:44:48 +0000 | [diff] [blame] | 592 | // static, static inline, always_inline, and extern inline functions can |
Chris Lattner | 86daeee | 2009-04-14 16:44:36 +0000 | [diff] [blame] | 593 | // always be deferred. Normal inline functions can be deferred in C99/C++. |
Douglas Gregor | 8f51a4f | 2010-03-13 18:23:07 +0000 | [diff] [blame] | 594 | // Implicit template instantiations can also be deferred in C++. |
Chris Lattner | cbb8fc1 | 2009-04-14 20:25:53 +0000 | [diff] [blame] | 595 | if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || |
Eli Friedman | ab18995 | 2009-12-25 05:29:40 +0000 | [diff] [blame] | 596 | Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) |
Chris Lattner | dbb5a37 | 2009-04-14 06:44:48 +0000 | [diff] [blame] | 597 | return true; |
Chris Lattner | dbb5a37 | 2009-04-14 06:44:48 +0000 | [diff] [blame] | 598 | return false; |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 599 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 600 | |
Chris Lattner | dbb5a37 | 2009-04-14 06:44:48 +0000 | [diff] [blame] | 601 | const VarDecl *VD = cast<VarDecl>(Global); |
| 602 | assert(VD->isFileVarDecl() && "Invalid decl"); |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 603 | |
Anders Carlsson | 74d644a | 2009-10-08 17:28:59 +0000 | [diff] [blame] | 604 | // We never want to defer structs that have non-trivial constructors or |
| 605 | // destructors. |
| 606 | |
| 607 | // FIXME: Handle references. |
| 608 | if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { |
| 609 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { |
| 610 | if (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor()) |
| 611 | return false; |
| 612 | } |
| 613 | } |
| 614 | |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 615 | // Static data may be deferred, but out-of-line static data members |
| 616 | // cannot be. |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 617 | Linkage L = VD->getLinkage(); |
| 618 | if (L == ExternalLinkage && getContext().getLangOptions().CPlusPlus && |
| 619 | VD->getType()->getLinkage() == UniqueExternalLinkage) |
| 620 | L = UniqueExternalLinkage; |
| 621 | |
| 622 | switch (L) { |
| 623 | case NoLinkage: |
| 624 | case InternalLinkage: |
| 625 | case UniqueExternalLinkage: |
Fariborz Jahanian | 393c247 | 2009-11-05 18:03:03 +0000 | [diff] [blame] | 626 | // Initializer has side effects? |
| 627 | if (VD->getInit() && VD->getInit()->HasSideEffects(Context)) |
| 628 | return false; |
| 629 | return !(VD->isStaticDataMember() && VD->isOutOfLine()); |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 630 | |
| 631 | case ExternalLinkage: |
| 632 | break; |
Fariborz Jahanian | 393c247 | 2009-11-05 18:03:03 +0000 | [diff] [blame] | 633 | } |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 634 | |
Fariborz Jahanian | 393c247 | 2009-11-05 18:03:03 +0000 | [diff] [blame] | 635 | return false; |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 636 | } |
| 637 | |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 638 | llvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { |
| 639 | const AliasAttr *AA = VD->getAttr<AliasAttr>(); |
| 640 | assert(AA && "No alias?"); |
| 641 | |
| 642 | const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); |
| 643 | |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 644 | // See if there is already something with the target's name in the module. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 645 | llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 646 | |
| 647 | llvm::Constant *Aliasee; |
| 648 | if (isa<llvm::FunctionType>(DeclTy)) |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 649 | Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl()); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 650 | else |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 651 | Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 652 | llvm::PointerType::getUnqual(DeclTy), 0); |
| 653 | if (!Entry) { |
| 654 | llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); |
| 655 | F->setLinkage(llvm::Function::ExternalWeakLinkage); |
| 656 | WeakRefReferences.insert(F); |
| 657 | } |
| 658 | |
| 659 | return Aliasee; |
| 660 | } |
| 661 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 662 | void CodeGenModule::EmitGlobal(GlobalDecl GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 663 | const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 664 | |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 665 | // Weak references don't produce any output by themselves. |
| 666 | if (Global->hasAttr<WeakRefAttr>()) |
| 667 | return; |
| 668 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 669 | // If this is an alias definition (which otherwise looks like a declaration) |
| 670 | // emit it now. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 671 | if (Global->hasAttr<AliasAttr>()) |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 672 | return EmitAliasDefinition(GD); |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 673 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 674 | // Ignore declarations, they will be emitted on their first use. |
Daniel Dunbar | 5e1e1f9 | 2009-03-19 08:27:24 +0000 | [diff] [blame] | 675 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 676 | // Forward declarations are emitted lazily on first use. |
| 677 | if (!FD->isThisDeclarationADefinition()) |
| 678 | return; |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 679 | } else { |
| 680 | const VarDecl *VD = cast<VarDecl>(Global); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 681 | assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); |
| 682 | |
Douglas Gregor | a9a55c0 | 2010-02-06 05:15:45 +0000 | [diff] [blame] | 683 | if (VD->isThisDeclarationADefinition() != VarDecl::Definition) |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 684 | return; |
Nate Begeman | 4c13b7a | 2008-04-20 06:29:50 +0000 | [diff] [blame] | 685 | } |
| 686 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 687 | // Defer code generation when possible if this is a static definition, inline |
| 688 | // function etc. These we only want to emit if they are used. |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 689 | if (MayDeferGeneration(Global)) { |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 690 | // If the value has already been used, add it directly to the |
| 691 | // DeferredDeclsToEmit list. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 692 | MangleBuffer MangledName; |
| 693 | getMangledName(MangledName, GD); |
| 694 | if (GetGlobalValue(MangledName)) |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 695 | DeferredDeclsToEmit.push_back(GD); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 696 | else { |
| 697 | // Otherwise, remember that we saw a deferred decl with this name. The |
| 698 | // first use of the mangled name will cause it to move into |
| 699 | // DeferredDeclsToEmit. |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 700 | DeferredDecls[MangledName] = GD; |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 701 | } |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 702 | return; |
| 703 | } |
| 704 | |
| 705 | // Otherwise emit the definition. |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 706 | EmitGlobalDefinition(GD); |
Nate Begeman | 4c13b7a | 2008-04-20 06:29:50 +0000 | [diff] [blame] | 707 | } |
| 708 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 709 | void CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 710 | const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 711 | |
Anders Carlsson | 8e2efcc | 2009-10-27 14:32:27 +0000 | [diff] [blame] | 712 | PrettyStackTraceDecl CrashInfo((ValueDecl *)D, D->getLocation(), |
| 713 | Context.getSourceManager(), |
| 714 | "Generating code for declaration"); |
| 715 | |
Eli Friedman | 72649ed | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 716 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { |
Anders Carlsson | 1a5e0d7 | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 717 | getVtableInfo().MaybeEmitVtable(GD); |
Eli Friedman | 72649ed | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 718 | if (MD->isVirtual() && MD->isOutOfLine() && |
| 719 | (!isa<CXXDestructorDecl>(D) || GD.getDtorType() != Dtor_Base)) { |
Eli Friedman | b455f0e | 2009-12-07 23:56:34 +0000 | [diff] [blame] | 720 | if (isa<CXXDestructorDecl>(D)) { |
| 721 | GlobalDecl CanonGD(cast<CXXDestructorDecl>(D->getCanonicalDecl()), |
| 722 | GD.getDtorType()); |
| 723 | BuildThunksForVirtual(CanonGD); |
| 724 | } else { |
| 725 | BuildThunksForVirtual(MD->getCanonicalDecl()); |
| 726 | } |
Eli Friedman | 72649ed | 2009-12-06 22:01:30 +0000 | [diff] [blame] | 727 | } |
| 728 | } |
Anders Carlsson | 1a5e0d7 | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 729 | |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 730 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) |
| 731 | EmitCXXConstructor(CD, GD.getCtorType()); |
Anders Carlsson | 7267c16 | 2009-05-29 21:03:38 +0000 | [diff] [blame] | 732 | else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) |
| 733 | EmitCXXDestructor(DD, GD.getDtorType()); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 734 | else if (isa<FunctionDecl>(D)) |
| 735 | EmitGlobalFunctionDefinition(GD); |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 736 | else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 737 | EmitGlobalVarDefinition(VD); |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 738 | else { |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 739 | assert(0 && "Invalid argument to EmitGlobalDefinition()"); |
| 740 | } |
| 741 | } |
| 742 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 743 | /// GetOrCreateLLVMFunction - If the specified mangled name is not in the |
| 744 | /// module, create and return an llvm Function with the specified type. If there |
| 745 | /// is something in the module with the specified name, return it potentially |
| 746 | /// bitcasted to the right type. |
| 747 | /// |
| 748 | /// If D is non-null, it specifies a decl that correspond to this. This is used |
| 749 | /// to set the attributes on the function when it is first created. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 750 | llvm::Constant * |
| 751 | CodeGenModule::GetOrCreateLLVMFunction(llvm::StringRef MangledName, |
| 752 | const llvm::Type *Ty, |
| 753 | GlobalDecl D) { |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 754 | // Lookup the entry, lazily creating it if necessary. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 755 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 756 | if (Entry) { |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 757 | if (WeakRefReferences.count(Entry)) { |
| 758 | const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); |
| 759 | if (FD && !FD->hasAttr<WeakAttr>()) |
| 760 | Entry->setLinkage(llvm::Function::ExternalLinkage); |
| 761 | |
| 762 | WeakRefReferences.erase(Entry); |
| 763 | } |
| 764 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 765 | if (Entry->getType()->getElementType() == Ty) |
| 766 | return Entry; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 767 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 768 | // Make sure the result is of the correct type. |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 769 | const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 770 | return llvm::ConstantExpr::getBitCast(Entry, PTy); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 771 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 772 | |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 773 | // This function doesn't have a complete type (for example, the return |
| 774 | // type is an incomplete struct). Use a fake type instead, and make |
| 775 | // sure not to try to set attributes. |
| 776 | bool IsIncompleteFunction = false; |
| 777 | if (!isa<llvm::FunctionType>(Ty)) { |
| 778 | Ty = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), |
| 779 | std::vector<const llvm::Type*>(), false); |
| 780 | IsIncompleteFunction = true; |
| 781 | } |
| 782 | llvm::Function *F = llvm::Function::Create(cast<llvm::FunctionType>(Ty), |
| 783 | llvm::Function::ExternalLinkage, |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 784 | MangledName, &getModule()); |
| 785 | assert(F->getName() == MangledName && "name was uniqued!"); |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 786 | if (D.getDecl()) |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 787 | SetFunctionAttributes(D, F, IsIncompleteFunction); |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 788 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 789 | // This is the first use or definition of a mangled name. If there is a |
| 790 | // deferred decl with this name, remember that we need to emit it at the end |
| 791 | // of the file. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 792 | llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 793 | if (DDI != DeferredDecls.end()) { |
| 794 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit |
| 795 | // list, and remove it from DeferredDecls (since we don't need it anymore). |
| 796 | DeferredDeclsToEmit.push_back(DDI->second); |
| 797 | DeferredDecls.erase(DDI); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 798 | } else if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl())) { |
Chris Lattner | 0c337ed | 2009-05-12 21:02:27 +0000 | [diff] [blame] | 799 | // If this the first reference to a C++ inline function in a class, queue up |
| 800 | // the deferred function body for emission. These are not seen as |
| 801 | // top-level declarations. |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 802 | if (FD->isThisDeclarationADefinition() && MayDeferGeneration(FD)) |
| 803 | DeferredDeclsToEmit.push_back(D); |
Fariborz Jahanian | c7ff8e1 | 2009-07-30 23:22:00 +0000 | [diff] [blame] | 804 | // A called constructor which has no definition or declaration need be |
| 805 | // synthesized. |
| 806 | else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(FD)) { |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 807 | if (CD->isImplicit()) { |
Benjamin Kramer | d3a344c | 2010-03-06 09:07:19 +0000 | [diff] [blame] | 808 | assert(CD->isUsed() && "Sema doesn't consider constructor as used."); |
Eli Friedman | 15233e5 | 2009-11-26 07:40:08 +0000 | [diff] [blame] | 809 | DeferredDeclsToEmit.push_back(D); |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 810 | } |
Eli Friedman | 15233e5 | 2009-11-26 07:40:08 +0000 | [diff] [blame] | 811 | } else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(FD)) { |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 812 | if (DD->isImplicit()) { |
Benjamin Kramer | d3a344c | 2010-03-06 09:07:19 +0000 | [diff] [blame] | 813 | assert(DD->isUsed() && "Sema doesn't consider destructor as used."); |
Eli Friedman | 15233e5 | 2009-11-26 07:40:08 +0000 | [diff] [blame] | 814 | DeferredDeclsToEmit.push_back(D); |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 815 | } |
Eli Friedman | 15233e5 | 2009-11-26 07:40:08 +0000 | [diff] [blame] | 816 | } else if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 817 | if (MD->isCopyAssignment() && MD->isImplicit()) { |
Benjamin Kramer | d3a344c | 2010-03-06 09:07:19 +0000 | [diff] [blame] | 818 | assert(MD->isUsed() && "Sema doesn't consider CopyAssignment as used."); |
Fariborz Jahanian | c7ff8e1 | 2009-07-30 23:22:00 +0000 | [diff] [blame] | 819 | DeferredDeclsToEmit.push_back(D); |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 820 | } |
Fariborz Jahanian | c7ff8e1 | 2009-07-30 23:22:00 +0000 | [diff] [blame] | 821 | } |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 822 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 823 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 824 | return F; |
| 825 | } |
| 826 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 827 | /// GetAddrOfFunction - Return the address of the given function. If Ty is |
| 828 | /// non-null, then this function will use the specified type if it has to |
| 829 | /// create it (this occurs when we see a definition of the function). |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 830 | llvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 831 | const llvm::Type *Ty) { |
| 832 | // If there was no specific requested type, just convert it now. |
| 833 | if (!Ty) |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 834 | Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 835 | MangleBuffer MangledName; |
| 836 | getMangledName(MangledName, GD); |
| 837 | return GetOrCreateLLVMFunction(MangledName, Ty, GD); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 838 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 839 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 840 | /// CreateRuntimeFunction - Create a new runtime function with the specified |
| 841 | /// type and name. |
| 842 | llvm::Constant * |
| 843 | CodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 844 | llvm::StringRef Name) { |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 845 | return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 846 | } |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 847 | |
Eli Friedman | 20e098b | 2009-12-11 21:23:03 +0000 | [diff] [blame] | 848 | static bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D) { |
John McCall | 8878686 | 2010-02-08 21:46:50 +0000 | [diff] [blame] | 849 | if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) |
Eli Friedman | 20e098b | 2009-12-11 21:23:03 +0000 | [diff] [blame] | 850 | return false; |
| 851 | if (Context.getLangOptions().CPlusPlus && |
| 852 | Context.getBaseElementType(D->getType())->getAs<RecordType>()) { |
| 853 | // FIXME: We should do something fancier here! |
| 854 | return false; |
| 855 | } |
| 856 | return true; |
| 857 | } |
| 858 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 859 | /// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, |
| 860 | /// create and return an llvm GlobalVariable with the specified type. If there |
| 861 | /// is something in the module with the specified name, return it potentially |
| 862 | /// bitcasted to the right type. |
| 863 | /// |
| 864 | /// If D is non-null, it specifies a decl that correspond to this. This is used |
| 865 | /// to set the attributes on the global when it is first created. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 866 | llvm::Constant * |
| 867 | CodeGenModule::GetOrCreateLLVMGlobal(llvm::StringRef 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. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 871 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 872 | if (Entry) { |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 873 | if (WeakRefReferences.count(Entry)) { |
| 874 | if (D && !D->hasAttr<WeakAttr>()) |
| 875 | Entry->setLinkage(llvm::Function::ExternalLinkage); |
| 876 | |
| 877 | WeakRefReferences.erase(Entry); |
| 878 | } |
| 879 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 880 | if (Entry->getType() == Ty) |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 881 | return Entry; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 882 | |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 883 | // Make sure the result is of the correct type. |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 884 | return llvm::ConstantExpr::getBitCast(Entry, Ty); |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 885 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 886 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 887 | // This is the first use or definition of a mangled name. If there is a |
| 888 | // deferred decl with this name, remember that we need to emit it at the end |
| 889 | // of the file. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 890 | llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 891 | if (DDI != DeferredDecls.end()) { |
| 892 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit |
| 893 | // list, and remove it from DeferredDecls (since we don't need it anymore). |
| 894 | DeferredDeclsToEmit.push_back(DDI->second); |
| 895 | DeferredDecls.erase(DDI); |
| 896 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 897 | |
| 898 | llvm::GlobalVariable *GV = |
| 899 | new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 900 | llvm::GlobalValue::ExternalLinkage, |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 901 | 0, MangledName, 0, |
Eli Friedman | 56ebe50 | 2009-04-19 21:05:03 +0000 | [diff] [blame] | 902 | false, Ty->getAddressSpace()); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 903 | |
| 904 | // Handle things which are present even on external declarations. |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 905 | if (D) { |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 906 | // FIXME: This code is overly simple and should be merged with other global |
| 907 | // handling. |
Eli Friedman | 20e098b | 2009-12-11 21:23:03 +0000 | [diff] [blame] | 908 | GV->setConstant(DeclIsConstantGlobal(Context, D)); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 909 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 910 | // FIXME: Merge with other attribute handling code. |
| 911 | if (D->getStorageClass() == VarDecl::PrivateExtern) |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 912 | GV->setVisibility(llvm::GlobalValue::HiddenVisibility); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 913 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 914 | if (D->hasAttr<WeakAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 915 | D->hasAttr<WeakImportAttr>()) |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 916 | GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); |
Eli Friedman | 56ebe50 | 2009-04-19 21:05:03 +0000 | [diff] [blame] | 917 | |
| 918 | GV->setThreadLocal(D->isThreadSpecified()); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 919 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 920 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 921 | return GV; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 922 | } |
| 923 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 924 | |
| 925 | /// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the |
| 926 | /// given global variable. If Ty is non-null and if the global doesn't exist, |
| 927 | /// then it will be greated with the specified type instead of whatever the |
| 928 | /// normal requested type would be. |
| 929 | llvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, |
| 930 | const llvm::Type *Ty) { |
| 931 | assert(D->hasGlobalStorage() && "Not a global variable"); |
| 932 | QualType ASTTy = D->getType(); |
| 933 | if (Ty == 0) |
| 934 | Ty = getTypes().ConvertTypeForMem(ASTTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 935 | |
| 936 | const llvm::PointerType *PTy = |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 937 | llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 938 | |
| 939 | MangleBuffer MangledName; |
| 940 | getMangledName(MangledName, D); |
| 941 | return GetOrCreateLLVMGlobal(MangledName, PTy, D); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 942 | } |
| 943 | |
| 944 | /// CreateRuntimeVariable - Create a new runtime global variable with the |
| 945 | /// specified type and name. |
| 946 | llvm::Constant * |
| 947 | CodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 948 | llvm::StringRef Name) { |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 949 | return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 950 | } |
| 951 | |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 952 | void CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { |
| 953 | assert(!D->getInit() && "Cannot emit definite definitions here!"); |
| 954 | |
Douglas Gregor | 7520bd1 | 2009-04-21 19:28:58 +0000 | [diff] [blame] | 955 | if (MayDeferGeneration(D)) { |
| 956 | // If we have not seen a reference to this variable yet, place it |
| 957 | // into the deferred declarations table to be emitted if needed |
| 958 | // later. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 959 | MangleBuffer MangledName; |
| 960 | getMangledName(MangledName, D); |
| 961 | if (!GetGlobalValue(MangledName)) { |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 962 | DeferredDecls[MangledName] = D; |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 963 | return; |
Douglas Gregor | 7520bd1 | 2009-04-21 19:28:58 +0000 | [diff] [blame] | 964 | } |
| 965 | } |
| 966 | |
| 967 | // The tentative definition is the only definition. |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 968 | EmitGlobalVarDefinition(D); |
| 969 | } |
| 970 | |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 971 | llvm::GlobalVariable::LinkageTypes |
| 972 | CodeGenModule::getVtableLinkage(const CXXRecordDecl *RD) { |
Douglas Gregor | dffb801 | 2010-01-06 22:00:56 +0000 | [diff] [blame] | 973 | if (RD->isInAnonymousNamespace() || !RD->hasLinkage()) |
| 974 | return llvm::GlobalVariable::InternalLinkage; |
| 975 | |
| 976 | if (const CXXMethodDecl *KeyFunction |
| 977 | = RD->getASTContext().getKeyFunction(RD)) { |
| 978 | // If this class has a key function, use that to determine the linkage of |
| 979 | // the vtable. |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 980 | const FunctionDecl *Def = 0; |
| 981 | if (KeyFunction->getBody(Def)) |
| 982 | KeyFunction = cast<CXXMethodDecl>(Def); |
Douglas Gregor | dffb801 | 2010-01-06 22:00:56 +0000 | [diff] [blame] | 983 | |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 984 | switch (KeyFunction->getTemplateSpecializationKind()) { |
| 985 | case TSK_Undeclared: |
| 986 | case TSK_ExplicitSpecialization: |
| 987 | if (KeyFunction->isInlined()) |
| 988 | return llvm::GlobalVariable::WeakODRLinkage; |
| 989 | |
| 990 | return llvm::GlobalVariable::ExternalLinkage; |
| 991 | |
| 992 | case TSK_ImplicitInstantiation: |
| 993 | case TSK_ExplicitInstantiationDefinition: |
| 994 | return llvm::GlobalVariable::WeakODRLinkage; |
| 995 | |
| 996 | case TSK_ExplicitInstantiationDeclaration: |
| 997 | // FIXME: Use available_externally linkage. However, this currently |
| 998 | // breaks LLVM's build due to undefined symbols. |
| 999 | // return llvm::GlobalVariable::AvailableExternallyLinkage; |
| 1000 | return llvm::GlobalVariable::WeakODRLinkage; |
| 1001 | } |
Douglas Gregor | dffb801 | 2010-01-06 22:00:56 +0000 | [diff] [blame] | 1002 | } |
| 1003 | |
| 1004 | switch (RD->getTemplateSpecializationKind()) { |
| 1005 | case TSK_Undeclared: |
| 1006 | case TSK_ExplicitSpecialization: |
| 1007 | case TSK_ImplicitInstantiation: |
| 1008 | case TSK_ExplicitInstantiationDefinition: |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 1009 | return llvm::GlobalVariable::WeakODRLinkage; |
Douglas Gregor | dffb801 | 2010-01-06 22:00:56 +0000 | [diff] [blame] | 1010 | |
| 1011 | case TSK_ExplicitInstantiationDeclaration: |
| 1012 | // FIXME: Use available_externally linkage. However, this currently |
| 1013 | // breaks LLVM's build due to undefined symbols. |
| 1014 | // return llvm::GlobalVariable::AvailableExternallyLinkage; |
| 1015 | return llvm::GlobalVariable::WeakODRLinkage; |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 1016 | } |
| 1017 | |
| 1018 | // Silence GCC warning. |
| 1019 | return llvm::GlobalVariable::WeakODRLinkage; |
| 1020 | } |
| 1021 | |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1022 | static CodeGenModule::GVALinkage |
| 1023 | GetLinkageForVariable(ASTContext &Context, const VarDecl *VD) { |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 1024 | // If this is a static data member, compute the kind of template |
| 1025 | // specialization. Otherwise, this variable is not part of a |
| 1026 | // template. |
| 1027 | TemplateSpecializationKind TSK = TSK_Undeclared; |
| 1028 | if (VD->isStaticDataMember()) |
| 1029 | TSK = VD->getTemplateSpecializationKind(); |
| 1030 | |
| 1031 | Linkage L = VD->getLinkage(); |
| 1032 | if (L == ExternalLinkage && Context.getLangOptions().CPlusPlus && |
| 1033 | VD->getType()->getLinkage() == UniqueExternalLinkage) |
| 1034 | L = UniqueExternalLinkage; |
| 1035 | |
| 1036 | switch (L) { |
| 1037 | case NoLinkage: |
| 1038 | case InternalLinkage: |
| 1039 | case UniqueExternalLinkage: |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1040 | return CodeGenModule::GVA_Internal; |
| 1041 | |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 1042 | case ExternalLinkage: |
| 1043 | switch (TSK) { |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1044 | case TSK_Undeclared: |
| 1045 | case TSK_ExplicitSpecialization: |
Douglas Gregor | 34fd284 | 2010-03-13 03:49:57 +0000 | [diff] [blame] | 1046 | return CodeGenModule::GVA_StrongExternal; |
Douglas Gregor | 8f51a4f | 2010-03-13 18:23:07 +0000 | [diff] [blame] | 1047 | |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1048 | case TSK_ExplicitInstantiationDeclaration: |
Jeffrey Yasskin | 9f61aa9 | 2009-12-12 05:05:38 +0000 | [diff] [blame] | 1049 | llvm_unreachable("Variable should not be instantiated"); |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1050 | // Fall through to treat this like any other instantiation. |
| 1051 | |
Douglas Gregor | 8f51a4f | 2010-03-13 18:23:07 +0000 | [diff] [blame] | 1052 | case TSK_ExplicitInstantiationDefinition: |
| 1053 | return CodeGenModule::GVA_ExplicitTemplateInstantiation; |
| 1054 | |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1055 | case TSK_ImplicitInstantiation: |
Douglas Gregor | 0b6bc8b | 2010-02-03 09:33:45 +0000 | [diff] [blame] | 1056 | return CodeGenModule::GVA_TemplateInstantiation; |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1057 | } |
| 1058 | } |
Eli Friedman | bd94ab9 | 2009-11-26 02:52:12 +0000 | [diff] [blame] | 1059 | |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1060 | return CodeGenModule::GVA_StrongExternal; |
| 1061 | } |
| 1062 | |
Ken Dyck | 687cc4a | 2010-01-26 13:48:07 +0000 | [diff] [blame] | 1063 | CharUnits CodeGenModule::GetTargetTypeStoreSize(const llvm::Type *Ty) const { |
| 1064 | return CharUnits::fromQuantity( |
| 1065 | TheTargetData.getTypeStoreSizeInBits(Ty) / Context.getCharWidth()); |
| 1066 | } |
| 1067 | |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1068 | void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { |
Chris Lattner | 8f32f71 | 2007-07-14 00:23:28 +0000 | [diff] [blame] | 1069 | llvm::Constant *Init = 0; |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1070 | QualType ASTTy = D->getType(); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 1071 | bool NonConstInit = false; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1072 | |
Sebastian Redl | 31310a2 | 2010-02-01 20:16:42 +0000 | [diff] [blame] | 1073 | const Expr *InitExpr = D->getAnyInitializer(); |
Anders Carlsson | 3bb9269 | 2010-01-26 17:43:42 +0000 | [diff] [blame] | 1074 | |
| 1075 | if (!InitExpr) { |
Eli Friedman | cd5f4aa | 2008-05-30 20:39:54 +0000 | [diff] [blame] | 1076 | // This is a tentative definition; tentative definitions are |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 1077 | // implicitly initialized with { 0 }. |
| 1078 | // |
| 1079 | // Note that tentative definitions are only emitted at the end of |
| 1080 | // a translation unit, so they should never have incomplete |
| 1081 | // type. In addition, EmitTentativeDefinition makes sure that we |
| 1082 | // never attempt to emit a tentative definition if a real one |
| 1083 | // exists. A use may still exists, however, so we still may need |
| 1084 | // to do a RAUW. |
| 1085 | assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); |
Anders Carlsson | b0d0ea0 | 2009-08-02 21:18:22 +0000 | [diff] [blame] | 1086 | Init = EmitNullConstant(D->getType()); |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1087 | } else { |
Anders Carlsson | 3bb9269 | 2010-01-26 17:43:42 +0000 | [diff] [blame] | 1088 | Init = EmitConstantExpr(InitExpr, D->getType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1089 | |
Eli Friedman | 6e656f4 | 2009-02-20 01:18:21 +0000 | [diff] [blame] | 1090 | if (!Init) { |
Anders Carlsson | 3bb9269 | 2010-01-26 17:43:42 +0000 | [diff] [blame] | 1091 | QualType T = InitExpr->getType(); |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 1092 | if (getLangOptions().CPlusPlus) { |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 1093 | EmitCXXGlobalVarDeclInitFunc(D); |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 1094 | Init = EmitNullConstant(T); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 1095 | NonConstInit = true; |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 1096 | } else { |
| 1097 | ErrorUnsupported(D, "static initializer"); |
| 1098 | Init = llvm::UndefValue::get(getTypes().ConvertType(T)); |
| 1099 | } |
Eli Friedman | 6e656f4 | 2009-02-20 01:18:21 +0000 | [diff] [blame] | 1100 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1101 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1102 | |
Chris Lattner | 2d58406 | 2009-03-21 08:13:05 +0000 | [diff] [blame] | 1103 | const llvm::Type* InitType = Init->getType(); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1104 | llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1105 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1106 | // Strip off a bitcast if we got one back. |
| 1107 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1108 | assert(CE->getOpcode() == llvm::Instruction::BitCast || |
| 1109 | // all zero index gep. |
| 1110 | CE->getOpcode() == llvm::Instruction::GetElementPtr); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1111 | Entry = CE->getOperand(0); |
| 1112 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1113 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1114 | // Entry is now either a Function or GlobalVariable. |
| 1115 | llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1116 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1117 | // We have a definition after a declaration with the wrong type. |
| 1118 | // We must make a new GlobalVariable* and update everything that used OldGV |
| 1119 | // (a declaration or tentative definition) with the new GlobalVariable* |
| 1120 | // (which will be a definition). |
| 1121 | // |
| 1122 | // This happens if there is a prototype for a global (e.g. |
| 1123 | // "extern int x[];") and then a definition of a different type (e.g. |
| 1124 | // "int x[10];"). This also happens when an initializer has a different type |
| 1125 | // from the type of the global (this happens with unions). |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1126 | if (GV == 0 || |
| 1127 | GV->getType()->getElementType() != InitType || |
| 1128 | GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1129 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 1130 | // Move the old entry aside so that we'll create a new one. |
| 1131 | Entry->setName(llvm::StringRef()); |
Daniel Dunbar | 232350d | 2009-02-19 05:36:41 +0000 | [diff] [blame] | 1132 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1133 | // Make a new global with the correct type, this is now guaranteed to work. |
| 1134 | GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1135 | |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1136 | // Replace all uses of the old global with the new global |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1137 | llvm::Constant *NewPtrForOldDecl = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1138 | llvm::ConstantExpr::getBitCast(GV, Entry->getType()); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1139 | Entry->replaceAllUsesWith(NewPtrForOldDecl); |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1140 | |
| 1141 | // Erase the old global, since it is no longer used. |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1142 | cast<llvm::GlobalValue>(Entry)->eraseFromParent(); |
Chris Lattner | 8f32f71 | 2007-07-14 00:23:28 +0000 | [diff] [blame] | 1143 | } |
Devang Patel | 8e53e72 | 2007-10-26 16:31:40 +0000 | [diff] [blame] | 1144 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1145 | if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1146 | SourceManager &SM = Context.getSourceManager(); |
| 1147 | AddAnnotation(EmitAnnotateAttr(GV, AA, |
Chris Lattner | f7cf85b | 2009-01-16 07:36:28 +0000 | [diff] [blame] | 1148 | SM.getInstantiationLineNumber(D->getLocation()))); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1149 | } |
| 1150 | |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1151 | GV->setInitializer(Init); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1152 | |
| 1153 | // If it is safe to mark the global 'constant', do so now. |
| 1154 | GV->setConstant(false); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 1155 | if (!NonConstInit && DeclIsConstantGlobal(Context, D)) |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1156 | GV->setConstant(true); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1157 | |
Ken Dyck | 8b752f1 | 2010-01-27 17:10:57 +0000 | [diff] [blame] | 1158 | GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); |
Eli Friedman | 08d7802 | 2008-05-29 11:10:27 +0000 | [diff] [blame] | 1159 | |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1160 | // Set the llvm linkage type as appropriate. |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1161 | GVALinkage Linkage = GetLinkageForVariable(getContext(), D); |
Douglas Gregor | a0f00a7 | 2009-10-14 21:36:34 +0000 | [diff] [blame] | 1162 | if (Linkage == GVA_Internal) |
Chris Lattner | 8fabd78 | 2008-05-04 01:44:26 +0000 | [diff] [blame] | 1163 | GV->setLinkage(llvm::Function::InternalLinkage); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1164 | else if (D->hasAttr<DLLImportAttr>()) |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1165 | GV->setLinkage(llvm::Function::DLLImportLinkage); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1166 | else if (D->hasAttr<DLLExportAttr>()) |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1167 | GV->setLinkage(llvm::Function::DLLExportLinkage); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1168 | else if (D->hasAttr<WeakAttr>()) { |
| 1169 | if (GV->isConstant()) |
| 1170 | GV->setLinkage(llvm::GlobalVariable::WeakODRLinkage); |
| 1171 | else |
| 1172 | GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); |
Douglas Gregor | 8f51a4f | 2010-03-13 18:23:07 +0000 | [diff] [blame] | 1173 | } else if (Linkage == GVA_TemplateInstantiation || |
| 1174 | Linkage == GVA_ExplicitTemplateInstantiation) |
| 1175 | // FIXME: It seems like we can provide more specific linkage here |
| 1176 | // (LinkOnceODR, WeakODR). |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1177 | GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); |
Daniel Dunbar | 1bc5c03 | 2009-11-30 08:40:34 +0000 | [diff] [blame] | 1178 | else if (!getLangOptions().CPlusPlus && !CodeGenOpts.NoCommon && |
Chris Lattner | 309457d | 2009-08-05 04:56:58 +0000 | [diff] [blame] | 1179 | !D->hasExternalStorage() && !D->getInit() && |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1180 | !D->getAttr<SectionAttr>()) { |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1181 | GV->setLinkage(llvm::GlobalVariable::CommonLinkage); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1182 | // common vars aren't constant even if declared const. |
| 1183 | GV->setConstant(false); |
| 1184 | } else |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1185 | GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 1186 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1187 | SetCommonAttributes(D, GV); |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1188 | |
Sanjiv Gupta | 686226b | 2008-06-05 08:59:10 +0000 | [diff] [blame] | 1189 | // Emit global variable debug information. |
Chris Lattner | 2d58406 | 2009-03-21 08:13:05 +0000 | [diff] [blame] | 1190 | if (CGDebugInfo *DI = getDebugInfo()) { |
Daniel Dunbar | 66031a5 | 2008-10-17 16:15:48 +0000 | [diff] [blame] | 1191 | DI->setLocation(D->getLocation()); |
Sanjiv Gupta | 686226b | 2008-06-05 08:59:10 +0000 | [diff] [blame] | 1192 | DI->EmitGlobalVariable(GV, D); |
| 1193 | } |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1194 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1195 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1196 | /// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we |
| 1197 | /// implement a function with no prototype, e.g. "int foo() {}". If there are |
| 1198 | /// existing call uses of the old function in the module, this adjusts them to |
| 1199 | /// call the new function directly. |
| 1200 | /// |
| 1201 | /// This is not just a cleanup: the always_inline pass requires direct calls to |
| 1202 | /// functions to be able to inline them. If there is a bitcast in the way, it |
| 1203 | /// won't inline them. Instcombine normally deletes these calls, but it isn't |
| 1204 | /// run at -O0. |
| 1205 | static void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, |
| 1206 | llvm::Function *NewFn) { |
| 1207 | // If we're redefining a global as a function, don't transform it. |
| 1208 | llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); |
| 1209 | if (OldFn == 0) return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1210 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1211 | const llvm::Type *NewRetTy = NewFn->getReturnType(); |
| 1212 | llvm::SmallVector<llvm::Value*, 4> ArgList; |
| 1213 | |
| 1214 | for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); |
| 1215 | UI != E; ) { |
| 1216 | // 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] | 1217 | unsigned OpNo = UI.getOperandNo(); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1218 | llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*UI++); |
Chris Lattner | 08c93a7 | 2009-06-04 16:47:43 +0000 | [diff] [blame] | 1219 | if (!CI || OpNo != 0) continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1220 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1221 | // If the return types don't match exactly, and if the call isn't dead, then |
| 1222 | // we can't transform this call. |
| 1223 | if (CI->getType() != NewRetTy && !CI->use_empty()) |
| 1224 | continue; |
| 1225 | |
| 1226 | // If the function was passed too few arguments, don't transform. If extra |
| 1227 | // arguments were passed, we silently drop them. If any of the types |
| 1228 | // mismatch, we don't transform. |
| 1229 | unsigned ArgNo = 0; |
| 1230 | bool DontTransform = false; |
| 1231 | for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), |
| 1232 | E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { |
| 1233 | if (CI->getNumOperands()-1 == ArgNo || |
| 1234 | CI->getOperand(ArgNo+1)->getType() != AI->getType()) { |
| 1235 | DontTransform = true; |
| 1236 | break; |
| 1237 | } |
| 1238 | } |
| 1239 | if (DontTransform) |
| 1240 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1241 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1242 | // Okay, we can transform this. Create the new call instruction and copy |
| 1243 | // over the required information. |
| 1244 | ArgList.append(CI->op_begin()+1, CI->op_begin()+1+ArgNo); |
| 1245 | llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), |
| 1246 | ArgList.end(), "", CI); |
| 1247 | ArgList.clear(); |
Benjamin Kramer | ffbb15e | 2009-10-05 13:47:21 +0000 | [diff] [blame] | 1248 | if (!NewCall->getType()->isVoidTy()) |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1249 | NewCall->takeName(CI); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1250 | NewCall->setAttributes(CI->getAttributes()); |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 1251 | NewCall->setCallingConv(CI->getCallingConv()); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1252 | |
| 1253 | // Finally, remove the old call, replacing any uses with the new one. |
Chris Lattner | 00549fc | 2009-10-14 05:49:21 +0000 | [diff] [blame] | 1254 | if (!CI->use_empty()) |
| 1255 | CI->replaceAllUsesWith(NewCall); |
Devang Patel | 3b122bc | 2009-10-13 17:02:04 +0000 | [diff] [blame] | 1256 | |
Devang Patel | aa40454 | 2009-10-14 17:03:29 +0000 | [diff] [blame] | 1257 | // Copy any custom metadata attached with CI. |
Chris Lattner | 1280708 | 2009-12-29 07:49:13 +0000 | [diff] [blame] | 1258 | if (llvm::MDNode *DbgNode = CI->getMetadata("dbg")) |
| 1259 | NewCall->setMetadata("dbg", DbgNode); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1260 | CI->eraseFromParent(); |
| 1261 | } |
| 1262 | } |
| 1263 | |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1264 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1265 | void CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1266 | const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); |
John McCall | c0bf462 | 2010-02-23 00:48:20 +0000 | [diff] [blame] | 1267 | const llvm::FunctionType *Ty = getTypes().GetFunctionType(GD); |
Fariborz Jahanian | 4819ac4 | 2010-03-04 01:02:03 +0000 | [diff] [blame] | 1268 | getMangleContext().mangleInitDiscriminator(); |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 1269 | // Get or create the prototype for the function. |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1270 | llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1271 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1272 | // Strip off a bitcast if we got one back. |
| 1273 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { |
| 1274 | assert(CE->getOpcode() == llvm::Instruction::BitCast); |
| 1275 | Entry = CE->getOperand(0); |
| 1276 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1277 | |
| 1278 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1279 | if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1280 | llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1281 | |
Daniel Dunbar | 4274581 | 2009-03-09 23:53:08 +0000 | [diff] [blame] | 1282 | // If the types mismatch then we have to rewrite the definition. |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1283 | assert(OldFn->isDeclaration() && |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1284 | "Shouldn't replace non-declaration"); |
Chris Lattner | 3480950 | 2009-03-21 08:53:37 +0000 | [diff] [blame] | 1285 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 1286 | // F is the Function* for the one with the wrong type, we must make a new |
| 1287 | // Function* and update everything that used F (a declaration) with the new |
| 1288 | // Function* (which will be a definition). |
| 1289 | // |
| 1290 | // This happens if there is a prototype for a function |
| 1291 | // (e.g. "int f()") and then a definition of a different type |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 1292 | // (e.g. "int f(int x)"). Move the old function aside so that it |
| 1293 | // doesn't interfere with GetAddrOfFunction. |
| 1294 | OldFn->setName(llvm::StringRef()); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1295 | llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1296 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1297 | // If this is an implementation of a function without a prototype, try to |
| 1298 | // replace any existing uses of the function (which may be calls) with uses |
| 1299 | // of the new function |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 1300 | if (D->getType()->isFunctionNoProtoType()) { |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1301 | ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 1302 | OldFn->removeDeadConstantUsers(); |
| 1303 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1304 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 1305 | // 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] | 1306 | if (!Entry->use_empty()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1307 | llvm::Constant *NewPtrForOldDecl = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1308 | llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1309 | Entry->replaceAllUsesWith(NewPtrForOldDecl); |
| 1310 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1311 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 1312 | // Ok, delete the old function now, which is dead. |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1313 | OldFn->eraseFromParent(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1314 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1315 | Entry = NewFn; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1316 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1317 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1318 | llvm::Function *Fn = cast<llvm::Function>(Entry); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1319 | |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1320 | CodeGenFunction(*this).GenerateCode(D, Fn); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 1321 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1322 | SetFunctionDefinitionAttributes(D, Fn); |
| 1323 | SetLLVMFunctionAttributesForDefinition(D, Fn); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1324 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1325 | if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1326 | AddGlobalCtor(Fn, CA->getPriority()); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1327 | if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1328 | AddGlobalDtor(Fn, DA->getPriority()); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1329 | } |
| 1330 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 1331 | void CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { |
| 1332 | const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1333 | const AliasAttr *AA = D->getAttr<AliasAttr>(); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1334 | assert(AA && "Not an alias?"); |
| 1335 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 1336 | MangleBuffer MangledName; |
| 1337 | getMangledName(MangledName, GD); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1338 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 1339 | // If there is a definition in the module, then it wins over the alias. |
| 1340 | // This is dubious, but allow it to be safe. Just ignore the alias. |
| 1341 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); |
| 1342 | if (Entry && !Entry->isDeclaration()) |
| 1343 | return; |
| 1344 | |
| 1345 | const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1346 | |
| 1347 | // Create a reference to the named value. This ensures that it is emitted |
| 1348 | // if a deferred decl. |
| 1349 | llvm::Constant *Aliasee; |
| 1350 | if (isa<llvm::FunctionType>(DeclTy)) |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 1351 | Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl()); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1352 | else |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 1353 | Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1354 | llvm::PointerType::getUnqual(DeclTy), 0); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1355 | |
| 1356 | // Create the new alias itself, but don't set a name yet. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1357 | llvm::GlobalValue *GA = |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1358 | new llvm::GlobalAlias(Aliasee->getType(), |
| 1359 | llvm::Function::ExternalLinkage, |
| 1360 | "", Aliasee, &getModule()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1361 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1362 | if (Entry) { |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 1363 | assert(Entry->isDeclaration()); |
| 1364 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1365 | // If there is a declaration in the module, then we had an extern followed |
| 1366 | // by the alias, as in: |
| 1367 | // extern int test6(); |
| 1368 | // ... |
| 1369 | // int test6() __attribute__((alias("test7"))); |
| 1370 | // |
| 1371 | // Remove it and replace uses of it with the alias. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 1372 | GA->takeName(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1373 | |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1374 | Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1375 | Entry->getType())); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1376 | Entry->eraseFromParent(); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame^] | 1377 | } else { |
| 1378 | GA->setName(MangledName.getString()); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1379 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1380 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1381 | // Set attributes which are particular to an alias; this is a |
| 1382 | // specialization of the attributes which may be set on a global |
| 1383 | // variable/function. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1384 | if (D->hasAttr<DLLExportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1385 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 1386 | // The dllexport attribute is ignored for undefined symbols. |
Argyrios Kyrtzidis | 6fb0aee | 2009-06-30 02:35:26 +0000 | [diff] [blame] | 1387 | if (FD->getBody()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1388 | GA->setLinkage(llvm::Function::DLLExportLinkage); |
| 1389 | } else { |
| 1390 | GA->setLinkage(llvm::Function::DLLExportLinkage); |
| 1391 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1392 | } else if (D->hasAttr<WeakAttr>() || |
Rafael Espindola | 11e8ce7 | 2010-02-23 22:00:30 +0000 | [diff] [blame] | 1393 | D->hasAttr<WeakRefAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1394 | D->hasAttr<WeakImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1395 | GA->setLinkage(llvm::Function::WeakAnyLinkage); |
| 1396 | } |
| 1397 | |
| 1398 | SetCommonAttributes(D, GA); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1399 | } |
| 1400 | |
Chris Lattner | b808c95 | 2009-03-22 21:56:56 +0000 | [diff] [blame] | 1401 | /// getBuiltinLibFunction - Given a builtin id for a function like |
| 1402 | /// "__builtin_fabsf", return a Function* for "fabsf". |
Daniel Dunbar | 34771b5 | 2009-09-14 04:33:21 +0000 | [diff] [blame] | 1403 | llvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, |
| 1404 | unsigned BuiltinID) { |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1405 | assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1406 | Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1407 | "isn't a lib fn"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1408 | |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1409 | // Get the name, skip over the __builtin_ prefix (if necessary). |
| 1410 | const char *Name = Context.BuiltinInfo.GetName(BuiltinID); |
| 1411 | if (Context.BuiltinInfo.isLibFunction(BuiltinID)) |
| 1412 | Name += 10; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1413 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1414 | const llvm::FunctionType *Ty = |
Eli Friedman | 386ca78 | 2009-12-09 03:05:59 +0000 | [diff] [blame] | 1415 | cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1416 | |
Daniel Dunbar | 34771b5 | 2009-09-14 04:33:21 +0000 | [diff] [blame] | 1417 | return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD)); |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1418 | } |
| 1419 | |
Chris Lattner | 7acda7c | 2007-12-18 00:25:38 +0000 | [diff] [blame] | 1420 | llvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, |
| 1421 | unsigned NumTys) { |
| 1422 | return llvm::Intrinsic::getDeclaration(&getModule(), |
| 1423 | (llvm::Intrinsic::ID)IID, Tys, NumTys); |
| 1424 | } |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1425 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1426 | llvm::Function *CodeGenModule::getMemCpyFn() { |
| 1427 | if (MemCpyFn) return MemCpyFn; |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1428 | const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); |
Chris Lattner | 4e8a9e8 | 2008-11-21 16:43:15 +0000 | [diff] [blame] | 1429 | return MemCpyFn = getIntrinsic(llvm::Intrinsic::memcpy, &IntPtr, 1); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1430 | } |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1431 | |
Eli Friedman | 0c99509 | 2008-05-26 12:59:39 +0000 | [diff] [blame] | 1432 | llvm::Function *CodeGenModule::getMemMoveFn() { |
| 1433 | if (MemMoveFn) return MemMoveFn; |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1434 | const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); |
Chris Lattner | 4e8a9e8 | 2008-11-21 16:43:15 +0000 | [diff] [blame] | 1435 | return MemMoveFn = getIntrinsic(llvm::Intrinsic::memmove, &IntPtr, 1); |
Eli Friedman | 0c99509 | 2008-05-26 12:59:39 +0000 | [diff] [blame] | 1436 | } |
| 1437 | |
Lauro Ramos Venancio | 41ef30e | 2008-02-19 22:01:01 +0000 | [diff] [blame] | 1438 | llvm::Function *CodeGenModule::getMemSetFn() { |
| 1439 | if (MemSetFn) return MemSetFn; |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1440 | const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); |
Chris Lattner | 4e8a9e8 | 2008-11-21 16:43:15 +0000 | [diff] [blame] | 1441 | return MemSetFn = getIntrinsic(llvm::Intrinsic::memset, &IntPtr, 1); |
Lauro Ramos Venancio | 41ef30e | 2008-02-19 22:01:01 +0000 | [diff] [blame] | 1442 | } |
Chris Lattner | 7acda7c | 2007-12-18 00:25:38 +0000 | [diff] [blame] | 1443 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1444 | static llvm::StringMapEntry<llvm::Constant*> & |
| 1445 | GetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, |
| 1446 | const StringLiteral *Literal, |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1447 | bool TargetIsLSB, |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1448 | bool &IsUTF16, |
| 1449 | unsigned &StringLength) { |
Daniel Dunbar | df4eee9 | 2009-09-22 03:27:52 +0000 | [diff] [blame] | 1450 | unsigned NumBytes = Literal->getByteLength(); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1451 | |
Daniel Dunbar | f015b03 | 2009-09-22 10:03:52 +0000 | [diff] [blame] | 1452 | // Check for simple case. |
| 1453 | if (!Literal->containsNonAsciiOrNull()) { |
| 1454 | StringLength = NumBytes; |
| 1455 | return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), |
| 1456 | StringLength)); |
| 1457 | } |
| 1458 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1459 | // Otherwise, convert the UTF8 literals into a byte string. |
| 1460 | llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); |
| 1461 | const UTF8 *FromPtr = (UTF8 *)Literal->getStrData(); |
| 1462 | UTF16 *ToPtr = &ToBuf[0]; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1463 | |
| 1464 | ConversionResult Result = ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1465 | &ToPtr, ToPtr + NumBytes, |
| 1466 | strictConversion); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1467 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1468 | // Check for conversion failure. |
| 1469 | if (Result != conversionOK) { |
| 1470 | // FIXME: Have Sema::CheckObjCString() validate the UTF-8 string and remove |
| 1471 | // this duplicate code. |
| 1472 | assert(Result == sourceIllegal && "UTF-8 to UTF-16 conversion failed"); |
Daniel Dunbar | f015b03 | 2009-09-22 10:03:52 +0000 | [diff] [blame] | 1473 | StringLength = NumBytes; |
| 1474 | return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), |
| 1475 | StringLength)); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1476 | } |
| 1477 | |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1478 | // ConvertUTF8toUTF16 returns the length in ToPtr. |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1479 | StringLength = ToPtr - &ToBuf[0]; |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1480 | |
| 1481 | // Render the UTF-16 string into a byte array and convert to the target byte |
| 1482 | // order. |
| 1483 | // |
| 1484 | // FIXME: This isn't something we should need to do here. |
| 1485 | llvm::SmallString<128> AsBytes; |
| 1486 | AsBytes.reserve(StringLength * 2); |
| 1487 | for (unsigned i = 0; i != StringLength; ++i) { |
| 1488 | unsigned short Val = ToBuf[i]; |
| 1489 | if (TargetIsLSB) { |
| 1490 | AsBytes.push_back(Val & 0xFF); |
| 1491 | AsBytes.push_back(Val >> 8); |
| 1492 | } else { |
| 1493 | AsBytes.push_back(Val >> 8); |
| 1494 | AsBytes.push_back(Val & 0xFF); |
| 1495 | } |
| 1496 | } |
Daniel Dunbar | 434da48 | 2009-08-03 21:47:08 +0000 | [diff] [blame] | 1497 | // Append one extra null character, the second is automatically added by our |
| 1498 | // caller. |
| 1499 | AsBytes.push_back(0); |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1500 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1501 | IsUTF16 = true; |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1502 | return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1503 | } |
| 1504 | |
| 1505 | llvm::Constant * |
| 1506 | CodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { |
| 1507 | unsigned StringLength = 0; |
| 1508 | bool isUTF16 = false; |
| 1509 | llvm::StringMapEntry<llvm::Constant*> &Entry = |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1510 | GetConstantCFStringEntry(CFConstantStringMap, Literal, |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1511 | getTargetData().isLittleEndian(), |
| 1512 | isUTF16, StringLength); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1513 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1514 | if (llvm::Constant *C = Entry.getValue()) |
| 1515 | return C; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1516 | |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1517 | llvm::Constant *Zero = |
| 1518 | llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1519 | llvm::Constant *Zeros[] = { Zero, Zero }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1520 | |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1521 | // If we don't already have it, get __CFConstantStringClassReference. |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1522 | if (!CFConstantStringClassRef) { |
| 1523 | const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1524 | Ty = llvm::ArrayType::get(Ty, 0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1525 | llvm::Constant *GV = CreateRuntimeVariable(Ty, |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1526 | "__CFConstantStringClassReference"); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1527 | // Decay array -> ptr |
| 1528 | CFConstantStringClassRef = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1529 | llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1530 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1531 | |
Anders Carlsson | e3daa76 | 2008-11-15 18:54:24 +0000 | [diff] [blame] | 1532 | QualType CFTy = getContext().getCFConstantStringType(); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1533 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1534 | const llvm::StructType *STy = |
Anders Carlsson | e3daa76 | 2008-11-15 18:54:24 +0000 | [diff] [blame] | 1535 | cast<llvm::StructType>(getTypes().ConvertType(CFTy)); |
| 1536 | |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1537 | std::vector<llvm::Constant*> Fields(4); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 1538 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1539 | // Class pointer. |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1540 | Fields[0] = CFConstantStringClassRef; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1541 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1542 | // Flags. |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1543 | const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1544 | Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1545 | llvm::ConstantInt::get(Ty, 0x07C8); |
| 1546 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1547 | // String pointer. |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1548 | llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1549 | |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1550 | llvm::GlobalValue::LinkageTypes Linkage; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1551 | bool isConstant; |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1552 | if (isUTF16) { |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1553 | // FIXME: why do utf strings get "_" labels instead of "L" labels? |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1554 | Linkage = llvm::GlobalValue::InternalLinkage; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1555 | // Note: -fwritable-strings doesn't make unicode CFStrings writable, but |
| 1556 | // does make plain ascii ones writable. |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1557 | isConstant = true; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1558 | } else { |
| 1559 | Linkage = llvm::GlobalValue::PrivateLinkage; |
| 1560 | isConstant = !Features.WritableStrings; |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1561 | } |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1562 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1563 | llvm::GlobalVariable *GV = |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1564 | new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, |
| 1565 | ".str"); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1566 | if (isUTF16) { |
Ken Dyck | 4da244c | 2010-01-26 18:46:23 +0000 | [diff] [blame] | 1567 | CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); |
| 1568 | GV->setAlignment(Align.getQuantity()); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1569 | } |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1570 | Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); |
| 1571 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1572 | // String length. |
| 1573 | Ty = getTypes().ConvertType(getContext().LongTy); |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1574 | Fields[3] = llvm::ConstantInt::get(Ty, StringLength); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1575 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1576 | // The struct. |
Owen Anderson | 08e2524 | 2009-07-27 22:29:56 +0000 | [diff] [blame] | 1577 | C = llvm::ConstantStruct::get(STy, Fields); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1578 | GV = new llvm::GlobalVariable(getModule(), C->getType(), true, |
| 1579 | llvm::GlobalVariable::PrivateLinkage, C, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1580 | "_unnamed_cfstring_"); |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1581 | if (const char *Sect = getContext().Target.getCFStringSection()) |
| 1582 | GV->setSection(Sect); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1583 | Entry.setValue(GV); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1584 | |
Anders Carlsson | 0c67829 | 2007-11-01 00:41:52 +0000 | [diff] [blame] | 1585 | return GV; |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1586 | } |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1587 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1588 | /// GetStringForStringLiteral - Return the appropriate bytes for a |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1589 | /// string literal, properly padded to match the literal type. |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1590 | std::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1591 | const char *StrData = E->getStrData(); |
| 1592 | unsigned Len = E->getByteLength(); |
| 1593 | |
| 1594 | const ConstantArrayType *CAT = |
| 1595 | getContext().getAsConstantArrayType(E->getType()); |
| 1596 | assert(CAT && "String isn't pointer or array!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1597 | |
Chris Lattner | dbb1ecc | 2009-02-26 23:01:51 +0000 | [diff] [blame] | 1598 | // Resize the string to the right size. |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1599 | std::string Str(StrData, StrData+Len); |
| 1600 | uint64_t RealLen = CAT->getSize().getZExtValue(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1601 | |
Chris Lattner | dbb1ecc | 2009-02-26 23:01:51 +0000 | [diff] [blame] | 1602 | if (E->isWide()) |
| 1603 | RealLen *= getContext().Target.getWCharWidth()/8; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1604 | |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1605 | Str.resize(RealLen, '\0'); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1606 | |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1607 | return Str; |
| 1608 | } |
| 1609 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1610 | /// GetAddrOfConstantStringFromLiteral - Return a pointer to a |
| 1611 | /// constant array for the given string literal. |
| 1612 | llvm::Constant * |
| 1613 | CodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { |
| 1614 | // FIXME: This can be more efficient. |
Eli Friedman | 7eb79c1 | 2009-11-16 05:55:46 +0000 | [diff] [blame] | 1615 | // FIXME: We shouldn't need to bitcast the constant in the wide string case. |
| 1616 | llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); |
| 1617 | if (S->isWide()) { |
| 1618 | llvm::Type *DestTy = |
| 1619 | llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); |
| 1620 | C = llvm::ConstantExpr::getBitCast(C, DestTy); |
| 1621 | } |
| 1622 | return C; |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1623 | } |
| 1624 | |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1625 | /// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant |
| 1626 | /// array for the given ObjCEncodeExpr node. |
| 1627 | llvm::Constant * |
| 1628 | CodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { |
| 1629 | std::string Str; |
| 1630 | getContext().getObjCEncodingForType(E->getEncodedType(), Str); |
Eli Friedman | a210f35 | 2009-03-07 20:17:55 +0000 | [diff] [blame] | 1631 | |
| 1632 | return GetAddrOfConstantCString(Str); |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1633 | } |
| 1634 | |
| 1635 | |
Chris Lattner | a7ad98f | 2008-02-11 00:02:17 +0000 | [diff] [blame] | 1636 | /// GenerateWritableString -- Creates storage for a string literal. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1637 | static llvm::Constant *GenerateStringLiteral(const std::string &str, |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1638 | bool constant, |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1639 | CodeGenModule &CGM, |
| 1640 | const char *GlobalName) { |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1641 | // Create Constant for this string literal. Don't add a '\0'. |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1642 | llvm::Constant *C = |
| 1643 | llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1644 | |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1645 | // Create a global variable for this string |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1646 | return new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1647 | llvm::GlobalValue::PrivateLinkage, |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 1648 | C, GlobalName); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1649 | } |
| 1650 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1651 | /// GetAddrOfConstantString - Returns a pointer to a character array |
| 1652 | /// containing the literal. This contents are exactly that of the |
| 1653 | /// given string, i.e. it will not be null terminated automatically; |
| 1654 | /// see GetAddrOfConstantCString. Note that whether the result is |
| 1655 | /// actually a pointer to an LLVM constant depends on |
| 1656 | /// Feature.WriteableStrings. |
| 1657 | /// |
| 1658 | /// The result has pointer to array type. |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1659 | llvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, |
| 1660 | const char *GlobalName) { |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1661 | bool IsConstant = !Features.WritableStrings; |
| 1662 | |
| 1663 | // Get the default prefix if a name wasn't specified. |
| 1664 | if (!GlobalName) |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1665 | GlobalName = ".str"; |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1666 | |
| 1667 | // Don't share any string literals if strings aren't constant. |
| 1668 | if (!IsConstant) |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1669 | return GenerateStringLiteral(str, false, *this, GlobalName); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1670 | |
| 1671 | llvm::StringMapEntry<llvm::Constant *> &Entry = |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1672 | ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1673 | |
| 1674 | if (Entry.getValue()) |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1675 | return Entry.getValue(); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1676 | |
| 1677 | // Create a global variable for this. |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1678 | llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1679 | Entry.setValue(C); |
| 1680 | return C; |
| 1681 | } |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1682 | |
| 1683 | /// GetAddrOfConstantCString - Returns a pointer to a character |
| 1684 | /// array containing the literal and a terminating '\-' |
| 1685 | /// character. The result has pointer to array type. |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1686 | llvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, |
| 1687 | const char *GlobalName){ |
Chris Lattner | c9f29c6 | 2008-12-09 19:10:54 +0000 | [diff] [blame] | 1688 | return GetAddrOfConstantString(str + '\0', GlobalName); |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1689 | } |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1690 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1691 | /// EmitObjCPropertyImplementations - Emit information for synthesized |
| 1692 | /// properties for an implementation. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1693 | void CodeGenModule::EmitObjCPropertyImplementations(const |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1694 | ObjCImplementationDecl *D) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1695 | for (ObjCImplementationDecl::propimpl_iterator |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1696 | i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1697 | ObjCPropertyImplDecl *PID = *i; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1698 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1699 | // Dynamic is just for type-checking. |
| 1700 | if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { |
| 1701 | ObjCPropertyDecl *PD = PID->getPropertyDecl(); |
| 1702 | |
| 1703 | // Determine which methods need to be implemented, some may have |
| 1704 | // been overridden. Note that ::isSynthesized is not the method |
| 1705 | // we want, that just indicates if the decl came from a |
| 1706 | // property. What we want to know is if the method is defined in |
| 1707 | // this implementation. |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1708 | if (!D->getInstanceMethod(PD->getGetterName())) |
Fariborz Jahanian | fef30b5 | 2008-12-09 20:23:04 +0000 | [diff] [blame] | 1709 | CodeGenFunction(*this).GenerateObjCGetter( |
| 1710 | const_cast<ObjCImplementationDecl *>(D), PID); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1711 | if (!PD->isReadOnly() && |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1712 | !D->getInstanceMethod(PD->getSetterName())) |
Fariborz Jahanian | fef30b5 | 2008-12-09 20:23:04 +0000 | [diff] [blame] | 1713 | CodeGenFunction(*this).GenerateObjCSetter( |
| 1714 | const_cast<ObjCImplementationDecl *>(D), PID); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1715 | } |
| 1716 | } |
| 1717 | } |
| 1718 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1719 | /// EmitNamespace - Emit all declarations in a namespace. |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 1720 | void CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1721 | for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 1722 | I != E; ++I) |
| 1723 | EmitTopLevelDecl(*I); |
| 1724 | } |
| 1725 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1726 | // EmitLinkageSpec - Emit all declarations in a linkage spec. |
| 1727 | void CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { |
Eli Friedman | f976be8 | 2009-08-01 20:48:04 +0000 | [diff] [blame] | 1728 | if (LSD->getLanguage() != LinkageSpecDecl::lang_c && |
| 1729 | LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1730 | ErrorUnsupported(LSD, "linkage spec"); |
| 1731 | return; |
| 1732 | } |
| 1733 | |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1734 | for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1735 | I != E; ++I) |
| 1736 | EmitTopLevelDecl(*I); |
| 1737 | } |
| 1738 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1739 | /// EmitTopLevelDecl - Emit code for a single top level declaration. |
| 1740 | void CodeGenModule::EmitTopLevelDecl(Decl *D) { |
| 1741 | // If an error has occurred, stop code generation, but continue |
| 1742 | // parsing and semantic analysis (to ensure all warnings and errors |
| 1743 | // are emitted). |
| 1744 | if (Diags.hasErrorOccurred()) |
| 1745 | return; |
| 1746 | |
Douglas Gregor | 16e8be2 | 2009-06-29 17:30:29 +0000 | [diff] [blame] | 1747 | // Ignore dependent declarations. |
| 1748 | if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) |
| 1749 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1750 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1751 | switch (D->getKind()) { |
Anders Carlsson | 293361a | 2009-08-25 13:14:46 +0000 | [diff] [blame] | 1752 | case Decl::CXXConversion: |
Anders Carlsson | 2b77ba8 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 1753 | case Decl::CXXMethod: |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1754 | case Decl::Function: |
Douglas Gregor | 16e8be2 | 2009-06-29 17:30:29 +0000 | [diff] [blame] | 1755 | // Skip function templates |
| 1756 | if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) |
| 1757 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1758 | |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 1759 | EmitGlobal(cast<FunctionDecl>(D)); |
| 1760 | break; |
| 1761 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1762 | case Decl::Var: |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 1763 | EmitGlobal(cast<VarDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1764 | break; |
| 1765 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1766 | // C++ Decls |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1767 | case Decl::Namespace: |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 1768 | EmitNamespace(cast<NamespaceDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1769 | break; |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 1770 | // No code generation needed. |
John McCall | 9d0c661 | 2009-11-17 09:33:40 +0000 | [diff] [blame] | 1771 | case Decl::UsingShadow: |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 1772 | case Decl::Using: |
Douglas Gregor | dd9967a | 2009-09-02 23:49:23 +0000 | [diff] [blame] | 1773 | case Decl::UsingDirective: |
Douglas Gregor | 127102b | 2009-06-29 20:59:39 +0000 | [diff] [blame] | 1774 | case Decl::ClassTemplate: |
| 1775 | case Decl::FunctionTemplate: |
Anders Carlsson | 018837b | 2009-09-23 19:19:16 +0000 | [diff] [blame] | 1776 | case Decl::NamespaceAlias: |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 1777 | break; |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1778 | case Decl::CXXConstructor: |
Anders Carlsson | 1fe598c | 2009-11-24 05:16:24 +0000 | [diff] [blame] | 1779 | // Skip function templates |
| 1780 | if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) |
| 1781 | return; |
| 1782 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1783 | EmitCXXConstructors(cast<CXXConstructorDecl>(D)); |
| 1784 | break; |
Anders Carlsson | 27ae536 | 2009-04-17 01:58:57 +0000 | [diff] [blame] | 1785 | case Decl::CXXDestructor: |
| 1786 | EmitCXXDestructors(cast<CXXDestructorDecl>(D)); |
| 1787 | break; |
Anders Carlsson | 36674d2 | 2009-06-11 21:22:55 +0000 | [diff] [blame] | 1788 | |
| 1789 | case Decl::StaticAssert: |
| 1790 | // Nothing to do. |
| 1791 | break; |
| 1792 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1793 | // Objective-C Decls |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1794 | |
Fariborz Jahanian | 38e24c7 | 2009-03-18 22:33:24 +0000 | [diff] [blame] | 1795 | // Forward declarations, no (immediate) code generation. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1796 | case Decl::ObjCClass: |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1797 | case Decl::ObjCForwardProtocol: |
Fariborz Jahanian | b31cb7f | 2009-03-21 18:06:45 +0000 | [diff] [blame] | 1798 | case Decl::ObjCCategory: |
Chris Lattner | 285d0db | 2009-04-01 02:36:43 +0000 | [diff] [blame] | 1799 | case Decl::ObjCInterface: |
Chris Lattner | 285d0db | 2009-04-01 02:36:43 +0000 | [diff] [blame] | 1800 | break; |
| 1801 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1802 | case Decl::ObjCProtocol: |
Fariborz Jahanian | b31cb7f | 2009-03-21 18:06:45 +0000 | [diff] [blame] | 1803 | Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1804 | break; |
| 1805 | |
| 1806 | case Decl::ObjCCategoryImpl: |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1807 | // Categories have properties but don't support synthesize so we |
| 1808 | // can ignore them here. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1809 | Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); |
| 1810 | break; |
| 1811 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1812 | case Decl::ObjCImplementation: { |
| 1813 | ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); |
| 1814 | EmitObjCPropertyImplementations(OMD); |
| 1815 | Runtime->GenerateClass(OMD); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1816 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1817 | } |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1818 | case Decl::ObjCMethod: { |
| 1819 | ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); |
| 1820 | // If this is not a prototype, emit the body. |
Argyrios Kyrtzidis | 6fb0aee | 2009-06-30 02:35:26 +0000 | [diff] [blame] | 1821 | if (OMD->getBody()) |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1822 | CodeGenFunction(*this).GenerateObjCMethod(OMD); |
| 1823 | break; |
| 1824 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1825 | case Decl::ObjCCompatibleAlias: |
Fariborz Jahanian | 305c658 | 2009-01-08 01:10:55 +0000 | [diff] [blame] | 1826 | // compatibility-alias is a directive and has no code gen. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1827 | break; |
| 1828 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1829 | case Decl::LinkageSpec: |
| 1830 | EmitLinkageSpec(cast<LinkageSpecDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1831 | break; |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1832 | |
| 1833 | case Decl::FileScopeAsm: { |
| 1834 | FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); |
Benjamin Kramer | 8d04258 | 2009-12-11 13:33:18 +0000 | [diff] [blame] | 1835 | llvm::StringRef AsmString = AD->getAsmString()->getString(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1836 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1837 | const std::string &S = getModule().getModuleInlineAsm(); |
| 1838 | if (S.empty()) |
| 1839 | getModule().setModuleInlineAsm(AsmString); |
| 1840 | else |
Benjamin Kramer | 8d04258 | 2009-12-11 13:33:18 +0000 | [diff] [blame] | 1841 | getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1842 | break; |
| 1843 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1844 | |
| 1845 | default: |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 1846 | // Make sure we handled everything we should, every other kind is a |
| 1847 | // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind |
| 1848 | // function. Need to recode Decl::Kind to do that easily. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1849 | assert(isa<TypeDecl>(D) && "Unsupported decl kind"); |
| 1850 | } |
| 1851 | } |