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 | 06057ce | 2010-06-15 23:19:56 +0000 | [diff] [blame] | 21 | #include "clang/Frontend/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" |
Douglas Gregor | af89689 | 2010-06-21 18:41:26 +0000 | [diff] [blame] | 26 | #include "clang/AST/DeclTemplate.h" |
Anders Carlsson | 1a5e0d7 | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 27 | #include "clang/AST/RecordLayout.h" |
Chris Lattner | 1b63e4f | 2009-06-14 01:54:56 +0000 | [diff] [blame] | 28 | #include "clang/Basic/Builtins.h" |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 29 | #include "clang/Basic/Diagnostic.h" |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 30 | #include "clang/Basic/SourceManager.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 31 | #include "clang/Basic/TargetInfo.h" |
Steve Naroff | e9b7d8a | 2009-04-01 15:50:34 +0000 | [diff] [blame] | 32 | #include "clang/Basic/ConvertUTF.h" |
Nate Begeman | ec9426c | 2008-03-09 03:09:36 +0000 | [diff] [blame] | 33 | #include "llvm/CallingConv.h" |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 34 | #include "llvm/Module.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 35 | #include "llvm/Intrinsics.h" |
Chris Lattner | d5b8902 | 2009-12-28 21:44:41 +0000 | [diff] [blame] | 36 | #include "llvm/LLVMContext.h" |
John McCall | 6374c33 | 2010-03-06 00:35:14 +0000 | [diff] [blame] | 37 | #include "llvm/ADT/Triple.h" |
Anton Korobeynikov | 20ff310 | 2008-06-01 14:13:53 +0000 | [diff] [blame] | 38 | #include "llvm/Target/TargetData.h" |
Gabor Greif | 6ba728d | 2010-04-10 02:56:12 +0000 | [diff] [blame] | 39 | #include "llvm/Support/CallSite.h" |
Chris Lattner | 78f7ece | 2009-11-07 09:22:46 +0000 | [diff] [blame] | 40 | #include "llvm/Support/ErrorHandling.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 41 | using namespace clang; |
| 42 | using namespace CodeGen; |
| 43 | |
| 44 | |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 45 | CodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, |
John McCall | 468ec6c | 2010-03-04 04:29:44 +0000 | [diff] [blame] | 46 | llvm::Module &M, const llvm::TargetData &TD, |
| 47 | Diagnostic &diags) |
Chris Lattner | bd36064 | 2009-03-26 05:00:52 +0000 | [diff] [blame] | 48 | : BlockModule(C, M, TD, Types, *this), Context(C), |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 49 | Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), |
John McCall | 468ec6c | 2010-03-04 04:29:44 +0000 | [diff] [blame] | 50 | TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags), |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 51 | Types(C, M, TD, getTargetCodeGenInfo().getABIInfo()), |
Charles Davis | 3a811f1 | 2010-05-25 19:52:27 +0000 | [diff] [blame] | 52 | VTables(*this), Runtime(0), ABI(0), |
Daniel Dunbar | 673431a | 2010-07-16 00:00:15 +0000 | [diff] [blame] | 53 | CFConstantStringClassRef(0), NSConstantStringClassRef(0), |
| 54 | VMContext(M.getContext()), |
Daniel Dunbar | 754b9fb | 2010-07-16 00:00:19 +0000 | [diff] [blame] | 55 | NSConcreteGlobalBlockDecl(0), NSConcreteStackBlockDecl(0), |
Daniel Dunbar | 673431a | 2010-07-16 00:00:15 +0000 | [diff] [blame] | 56 | NSConcreteGlobalBlock(0), NSConcreteStackBlock(0), |
Daniel Dunbar | 754b9fb | 2010-07-16 00:00:19 +0000 | [diff] [blame] | 57 | BlockObjectAssignDecl(0), BlockObjectDisposeDecl(0), |
Daniel Dunbar | 673431a | 2010-07-16 00:00:15 +0000 | [diff] [blame] | 58 | BlockObjectAssign(0), BlockObjectDispose(0){ |
Daniel Dunbar | 208ff5e | 2008-08-11 18:12:00 +0000 | [diff] [blame] | 59 | |
Chris Lattner | 3c8f153 | 2009-03-21 07:12:05 +0000 | [diff] [blame] | 60 | if (!Features.ObjC1) |
| 61 | Runtime = 0; |
| 62 | else if (!Features.NeXTRuntime) |
| 63 | Runtime = CreateGNUObjCRuntime(*this); |
| 64 | else if (Features.ObjCNonFragileABI) |
| 65 | Runtime = CreateMacNonFragileABIObjCRuntime(*this); |
| 66 | else |
| 67 | Runtime = CreateMacObjCRuntime(*this); |
Sanjiv Gupta | e8b9f5b | 2008-05-08 08:54:20 +0000 | [diff] [blame] | 68 | |
Charles Davis | 3a811f1 | 2010-05-25 19:52:27 +0000 | [diff] [blame] | 69 | if (!Features.CPlusPlus) |
| 70 | ABI = 0; |
| 71 | else createCXXABI(); |
| 72 | |
Sanjiv Gupta | e8b9f5b | 2008-05-08 08:54:20 +0000 | [diff] [blame] | 73 | // If debug info generation is enabled, create the CGDebugInfo object. |
Anders Carlsson | 20f12a2 | 2009-12-06 18:00:51 +0000 | [diff] [blame] | 74 | DebugInfo = CodeGenOpts.DebugInfo ? new CGDebugInfo(*this) : 0; |
Chris Lattner | 2b94fe3 | 2008-03-01 08:45:05 +0000 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | CodeGenModule::~CodeGenModule() { |
Ted Kremenek | 815c78f | 2008-08-05 18:50:11 +0000 | [diff] [blame] | 78 | delete Runtime; |
Charles Davis | 3a811f1 | 2010-05-25 19:52:27 +0000 | [diff] [blame] | 79 | delete ABI; |
Ted Kremenek | 815c78f | 2008-08-05 18:50:11 +0000 | [diff] [blame] | 80 | delete DebugInfo; |
| 81 | } |
| 82 | |
David Chisnall | 0d13f6f | 2010-01-23 02:40:42 +0000 | [diff] [blame] | 83 | void CodeGenModule::createObjCRuntime() { |
| 84 | if (!Features.NeXTRuntime) |
| 85 | Runtime = CreateGNUObjCRuntime(*this); |
| 86 | else if (Features.ObjCNonFragileABI) |
| 87 | Runtime = CreateMacNonFragileABIObjCRuntime(*this); |
| 88 | else |
| 89 | Runtime = CreateMacObjCRuntime(*this); |
| 90 | } |
| 91 | |
Charles Davis | 3a811f1 | 2010-05-25 19:52:27 +0000 | [diff] [blame] | 92 | void CodeGenModule::createCXXABI() { |
Charles Davis | 98b7c5c | 2010-06-11 01:06:47 +0000 | [diff] [blame] | 93 | if (Context.Target.getCXXABI() == "microsoft") |
| 94 | ABI = CreateMicrosoftCXXABI(*this); |
| 95 | else |
| 96 | ABI = CreateItaniumCXXABI(*this); |
Charles Davis | 3a811f1 | 2010-05-25 19:52:27 +0000 | [diff] [blame] | 97 | } |
| 98 | |
Ted Kremenek | 815c78f | 2008-08-05 18:50:11 +0000 | [diff] [blame] | 99 | void CodeGenModule::Release() { |
Chris Lattner | 82227ff | 2009-03-22 21:21:57 +0000 | [diff] [blame] | 100 | EmitDeferred(); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 101 | EmitCXXGlobalInitFunc(); |
Daniel Dunbar | efb0fa9 | 2010-03-20 04:15:41 +0000 | [diff] [blame] | 102 | EmitCXXGlobalDtorFunc(); |
Daniel Dunbar | 208ff5e | 2008-08-11 18:12:00 +0000 | [diff] [blame] | 103 | if (Runtime) |
| 104 | if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) |
| 105 | AddGlobalCtor(ObjCInitFunction); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 106 | EmitCtorList(GlobalCtors, "llvm.global_ctors"); |
| 107 | EmitCtorList(GlobalDtors, "llvm.global_dtors"); |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 108 | EmitAnnotations(); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 109 | EmitLLVMUsed(); |
John McCall | 744016d | 2010-07-06 23:57:41 +0000 | [diff] [blame] | 110 | |
| 111 | if (getCodeGenOpts().EmitDeclMetadata) |
| 112 | EmitDeclMetadata(); |
Daniel Dunbar | f1968f2 | 2008-10-01 00:49:24 +0000 | [diff] [blame] | 113 | } |
| 114 | |
John McCall | 6374c33 | 2010-03-06 00:35:14 +0000 | [diff] [blame] | 115 | bool CodeGenModule::isTargetDarwin() const { |
| 116 | return getContext().Target.getTriple().getOS() == llvm::Triple::Darwin; |
| 117 | } |
| 118 | |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 119 | /// ErrorUnsupported - Print out an error that codegen doesn't support the |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 120 | /// specified stmt yet. |
Daniel Dunbar | 90df4b6 | 2008-09-04 03:43:08 +0000 | [diff] [blame] | 121 | void CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, |
| 122 | bool OmitOnError) { |
| 123 | if (OmitOnError && getDiags().hasErrorOccurred()) |
| 124 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 125 | unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, |
Daniel Dunbar | 56b8001 | 2009-02-06 19:18:03 +0000 | [diff] [blame] | 126 | "cannot compile this %0 yet"); |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 127 | std::string Msg = Type; |
Chris Lattner | 0a14eee | 2008-11-18 07:04:44 +0000 | [diff] [blame] | 128 | getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) |
| 129 | << Msg << S->getSourceRange(); |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 130 | } |
Chris Lattner | 58c3f9e | 2007-12-02 06:27:33 +0000 | [diff] [blame] | 131 | |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 132 | /// ErrorUnsupported - Print out an error that codegen doesn't support the |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 133 | /// specified decl yet. |
Daniel Dunbar | 90df4b6 | 2008-09-04 03:43:08 +0000 | [diff] [blame] | 134 | void CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, |
| 135 | bool OmitOnError) { |
| 136 | if (OmitOnError && getDiags().hasErrorOccurred()) |
| 137 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 138 | unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, |
Daniel Dunbar | 56b8001 | 2009-02-06 19:18:03 +0000 | [diff] [blame] | 139 | "cannot compile this %0 yet"); |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 140 | std::string Msg = Type; |
Chris Lattner | 0a14eee | 2008-11-18 07:04:44 +0000 | [diff] [blame] | 141 | getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 142 | } |
| 143 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 144 | LangOptions::VisibilityMode |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 145 | CodeGenModule::getDeclVisibilityMode(const Decl *D) const { |
| 146 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) |
| 147 | if (VD->getStorageClass() == VarDecl::PrivateExtern) |
| 148 | return LangOptions::Hidden; |
| 149 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 150 | if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) { |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 151 | switch (attr->getVisibility()) { |
| 152 | default: assert(0 && "Unknown visibility!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 153 | case VisibilityAttr::DefaultVisibility: |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 154 | return LangOptions::Default; |
| 155 | case VisibilityAttr::HiddenVisibility: |
| 156 | return LangOptions::Hidden; |
| 157 | case VisibilityAttr::ProtectedVisibility: |
| 158 | return LangOptions::Protected; |
| 159 | } |
| 160 | } |
Douglas Gregor | 7cf84d6 | 2010-06-15 17:05:35 +0000 | [diff] [blame] | 161 | |
Douglas Gregor | af89689 | 2010-06-21 18:41:26 +0000 | [diff] [blame] | 162 | if (getLangOptions().CPlusPlus) { |
| 163 | // Entities subject to an explicit instantiation declaration get default |
| 164 | // visibility. |
| 165 | if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { |
| 166 | if (Function->getTemplateSpecializationKind() |
| 167 | == TSK_ExplicitInstantiationDeclaration) |
| 168 | return LangOptions::Default; |
| 169 | } else if (const ClassTemplateSpecializationDecl *ClassSpec |
| 170 | = dyn_cast<ClassTemplateSpecializationDecl>(D)) { |
| 171 | if (ClassSpec->getSpecializationKind() |
| 172 | == TSK_ExplicitInstantiationDeclaration) |
| 173 | return LangOptions::Default; |
| 174 | } else if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) { |
| 175 | if (Record->getTemplateSpecializationKind() |
| 176 | == TSK_ExplicitInstantiationDeclaration) |
| 177 | return LangOptions::Default; |
| 178 | } else if (const VarDecl *Var = dyn_cast<VarDecl>(D)) { |
| 179 | if (Var->isStaticDataMember() && |
| 180 | (Var->getTemplateSpecializationKind() |
| 181 | == TSK_ExplicitInstantiationDeclaration)) |
| 182 | return LangOptions::Default; |
| 183 | } |
| 184 | |
| 185 | // If -fvisibility-inlines-hidden was provided, then inline C++ member |
| 186 | // functions get "hidden" visibility by default. |
| 187 | if (getLangOptions().InlineVisibilityHidden) |
| 188 | if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) |
| 189 | if (Method->isInlined()) |
| 190 | return LangOptions::Hidden; |
| 191 | } |
| 192 | |
Eli Friedman | aa8b0d1 | 2010-08-05 06:57:20 +0000 | [diff] [blame] | 193 | // If this decl is contained in a class, it should have the same visibility |
| 194 | // as the parent class. |
Anders Carlsson | 39de84d | 2010-02-07 01:44:36 +0000 | [diff] [blame] | 195 | if (const DeclContext *DC = D->getDeclContext()) |
Eli Friedman | aa8b0d1 | 2010-08-05 06:57:20 +0000 | [diff] [blame] | 196 | if (DC->isRecord()) |
| 197 | return getDeclVisibilityMode(cast<Decl>(DC)); |
Anders Carlsson | 39de84d | 2010-02-07 01:44:36 +0000 | [diff] [blame] | 198 | |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 199 | return getLangOptions().getVisibilityMode(); |
| 200 | } |
| 201 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 202 | void CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 203 | const Decl *D) const { |
| 204 | // Internal definitions always have default visibility. |
Chris Lattner | df102fc | 2009-04-14 05:27:13 +0000 | [diff] [blame] | 205 | if (GV->hasLocalLinkage()) { |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 206 | GV->setVisibility(llvm::GlobalValue::DefaultVisibility); |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 207 | return; |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 208 | } |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 209 | |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 210 | switch (getDeclVisibilityMode(D)) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 211 | default: assert(0 && "Unknown visibility!"); |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 212 | case LangOptions::Default: |
| 213 | return GV->setVisibility(llvm::GlobalValue::DefaultVisibility); |
| 214 | case LangOptions::Hidden: |
| 215 | return GV->setVisibility(llvm::GlobalValue::HiddenVisibility); |
| 216 | case LangOptions::Protected: |
| 217 | return GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 218 | } |
| 219 | } |
| 220 | |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 221 | /// Set the symbol visibility of type information (vtable and RTTI) |
| 222 | /// associated with the given type. |
| 223 | void CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV, |
| 224 | const CXXRecordDecl *RD, |
| 225 | bool IsForRTTI) const { |
| 226 | setGlobalVisibility(GV, RD); |
| 227 | |
| 228 | // We want to drop the visibility to hidden for weak type symbols. |
| 229 | // This isn't possible if there might be unresolved references |
| 230 | // elsewhere that rely on this symbol being visible. |
| 231 | |
John McCall | 7a53690 | 2010-08-05 20:39:18 +0000 | [diff] [blame] | 232 | // This should be kept roughly in sync with setThunkVisibility |
| 233 | // in CGVTables.cpp. |
| 234 | |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 235 | // Preconditions. |
| 236 | if (GV->getLinkage() != llvm::GlobalVariable::WeakODRLinkage || |
| 237 | GV->getVisibility() != llvm::GlobalVariable::DefaultVisibility) |
| 238 | return; |
| 239 | |
| 240 | // Don't override an explicit visibility attribute. |
| 241 | if (RD->hasAttr<VisibilityAttr>()) |
| 242 | return; |
| 243 | |
| 244 | switch (RD->getTemplateSpecializationKind()) { |
| 245 | // We have to disable the optimization if this is an EI definition |
| 246 | // because there might be EI declarations in other shared objects. |
| 247 | case TSK_ExplicitInstantiationDefinition: |
| 248 | case TSK_ExplicitInstantiationDeclaration: |
| 249 | return; |
| 250 | |
John McCall | 7a53690 | 2010-08-05 20:39:18 +0000 | [diff] [blame] | 251 | // Every use of a non-template class's type information has to emit it. |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 252 | case TSK_Undeclared: |
| 253 | break; |
| 254 | |
John McCall | 7a53690 | 2010-08-05 20:39:18 +0000 | [diff] [blame] | 255 | // In theory, implicit instantiations can ignore the possibility of |
| 256 | // an explicit instantiation declaration because there necessarily |
| 257 | // must be an EI definition somewhere with default visibility. In |
| 258 | // practice, it's possible to have an explicit instantiation for |
| 259 | // an arbitrary template class, and linkers aren't necessarily able |
| 260 | // to deal with mixed-visibility symbols. |
| 261 | case TSK_ExplicitSpecialization: |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 262 | case TSK_ImplicitInstantiation: |
John McCall | 7a53690 | 2010-08-05 20:39:18 +0000 | [diff] [blame] | 263 | if (!CodeGenOpts.EmitWeakTemplatesHidden) |
| 264 | return; |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 265 | break; |
| 266 | } |
| 267 | |
| 268 | // If there's a key function, there may be translation units |
| 269 | // that don't have the key function's definition. But ignore |
| 270 | // this if we're emitting RTTI under -fno-rtti. |
| 271 | if (!IsForRTTI || Features.RTTI) |
| 272 | if (Context.getKeyFunction(RD)) |
| 273 | return; |
| 274 | |
| 275 | // Otherwise, drop the visibility to hidden. |
| 276 | GV->setVisibility(llvm::GlobalValue::HiddenVisibility); |
| 277 | } |
| 278 | |
Anders Carlsson | 793a990 | 2010-06-22 16:05:32 +0000 | [diff] [blame] | 279 | llvm::StringRef CodeGenModule::getMangledName(GlobalDecl GD) { |
| 280 | const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); |
| 281 | |
| 282 | llvm::StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; |
| 283 | if (!Str.empty()) |
| 284 | return Str; |
| 285 | |
| 286 | if (!getMangleContext().shouldMangleDeclName(ND)) { |
| 287 | IdentifierInfo *II = ND->getIdentifier(); |
| 288 | assert(II && "Attempt to mangle unnamed decl."); |
| 289 | |
| 290 | Str = II->getName(); |
| 291 | return Str; |
| 292 | } |
| 293 | |
| 294 | llvm::SmallString<256> Buffer; |
| 295 | if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) |
| 296 | getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Buffer); |
| 297 | else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) |
| 298 | getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Buffer); |
| 299 | else if (const BlockDecl *BD = dyn_cast<BlockDecl>(ND)) |
Fariborz Jahanian | 564360b | 2010-06-24 00:08:06 +0000 | [diff] [blame] | 300 | getMangleContext().mangleBlock(GD, BD, Buffer); |
Anders Carlsson | 793a990 | 2010-06-22 16:05:32 +0000 | [diff] [blame] | 301 | else |
| 302 | getMangleContext().mangleName(ND, Buffer); |
| 303 | |
| 304 | // Allocate space for the mangled name. |
| 305 | size_t Length = Buffer.size(); |
| 306 | char *Name = MangledNamesAllocator.Allocate<char>(Length); |
| 307 | std::copy(Buffer.begin(), Buffer.end(), Name); |
| 308 | |
| 309 | Str = llvm::StringRef(Name, Length); |
| 310 | |
| 311 | return Str; |
| 312 | } |
| 313 | |
Fariborz Jahanian | 564360b | 2010-06-24 00:08:06 +0000 | [diff] [blame] | 314 | void CodeGenModule::getMangledName(GlobalDecl GD, MangleBuffer &Buffer, |
| 315 | const BlockDecl *BD) { |
| 316 | getMangleContext().mangleBlock(GD, BD, Buffer.getBuffer()); |
Anders Carlsson | 9a8822b | 2010-06-09 02:36:32 +0000 | [diff] [blame] | 317 | } |
| 318 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 319 | llvm::GlobalValue *CodeGenModule::GetGlobalValue(llvm::StringRef Name) { |
| 320 | return getModule().getNamedValue(Name); |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 321 | } |
| 322 | |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 323 | /// AddGlobalCtor - Add a function to the list that will be called before |
| 324 | /// main() runs. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 325 | void CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 326 | // FIXME: Type coercion of void()* types. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 327 | GlobalCtors.push_back(std::make_pair(Ctor, Priority)); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 328 | } |
| 329 | |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 330 | /// AddGlobalDtor - Add a function to the list that will be called |
| 331 | /// when the module is unloaded. |
| 332 | void CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 333 | // FIXME: Type coercion of void()* types. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 334 | GlobalDtors.push_back(std::make_pair(Dtor, Priority)); |
| 335 | } |
| 336 | |
| 337 | void CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { |
| 338 | // Ctor function type is void()*. |
| 339 | llvm::FunctionType* CtorFTy = |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 340 | llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 341 | std::vector<const llvm::Type*>(), |
| 342 | false); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 343 | llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 344 | |
| 345 | // Get the type of a ctor entry, { i32, void ()* }. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 346 | llvm::StructType* CtorStructTy = |
| 347 | llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 348 | llvm::PointerType::getUnqual(CtorFTy), NULL); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 349 | |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 350 | // Construct the constructor and destructor arrays. |
| 351 | std::vector<llvm::Constant*> Ctors; |
| 352 | for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { |
| 353 | std::vector<llvm::Constant*> S; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 354 | S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 355 | I->second, false)); |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 356 | S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); |
Owen Anderson | 08e2524 | 2009-07-27 22:29:56 +0000 | [diff] [blame] | 357 | Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 358 | } |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 359 | |
| 360 | if (!Ctors.empty()) { |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 361 | llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 362 | new llvm::GlobalVariable(TheModule, AT, false, |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 363 | llvm::GlobalValue::AppendingLinkage, |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 364 | llvm::ConstantArray::get(AT, Ctors), |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 365 | GlobalName); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 366 | } |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 367 | } |
| 368 | |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 369 | void CodeGenModule::EmitAnnotations() { |
| 370 | if (Annotations.empty()) |
| 371 | return; |
| 372 | |
| 373 | // Create a new global variable for the ConstantStruct in the Module. |
| 374 | llvm::Constant *Array = |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 375 | llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 376 | Annotations.size()), |
| 377 | Annotations); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 378 | llvm::GlobalValue *gv = |
| 379 | new llvm::GlobalVariable(TheModule, Array->getType(), false, |
| 380 | llvm::GlobalValue::AppendingLinkage, Array, |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 381 | "llvm.global.annotations"); |
Nate Begeman | 532485c | 2008-04-18 23:43:57 +0000 | [diff] [blame] | 382 | gv->setSection("llvm.metadata"); |
| 383 | } |
| 384 | |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 385 | llvm::GlobalValue::LinkageTypes |
| 386 | CodeGenModule::getFunctionLinkage(const FunctionDecl *D) { |
Argyrios Kyrtzidis | 90e99a8 | 2010-07-29 18:15:58 +0000 | [diff] [blame] | 387 | GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 388 | |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 389 | if (Linkage == GVA_Internal) |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 390 | return llvm::Function::InternalLinkage; |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 391 | |
| 392 | if (D->hasAttr<DLLExportAttr>()) |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 393 | return llvm::Function::DLLExportLinkage; |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 394 | |
| 395 | if (D->hasAttr<WeakAttr>()) |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 396 | return llvm::Function::WeakAnyLinkage; |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 397 | |
| 398 | // In C99 mode, 'inline' functions are guaranteed to have a strong |
| 399 | // definition somewhere else, so we can use available_externally linkage. |
| 400 | if (Linkage == GVA_C99Inline) |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 401 | return llvm::Function::AvailableExternallyLinkage; |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 402 | |
| 403 | // In C++, the compiler has to emit a definition in every translation unit |
| 404 | // that references the function. We should use linkonce_odr because |
| 405 | // a) if all references in this translation unit are optimized away, we |
| 406 | // don't need to codegen it. b) if the function persists, it needs to be |
| 407 | // merged with other definitions. c) C++ has the ODR, so we know the |
| 408 | // definition is dependable. |
| 409 | if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 410 | return llvm::Function::LinkOnceODRLinkage; |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 411 | |
| 412 | // An explicit instantiation of a template has weak linkage, since |
| 413 | // explicit instantiations can occur in multiple translation units |
| 414 | // and must all be equivalent. However, we are not allowed to |
| 415 | // throw away these explicit instantiations. |
| 416 | if (Linkage == GVA_ExplicitTemplateInstantiation) |
Douglas Gregor | 8f51a4f | 2010-03-13 18:23:07 +0000 | [diff] [blame] | 417 | return llvm::Function::WeakODRLinkage; |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 418 | |
| 419 | // Otherwise, we have strong external linkage. |
| 420 | assert(Linkage == GVA_StrongExternal); |
| 421 | return llvm::Function::ExternalLinkage; |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 422 | } |
Nuno Lopes | d4cbda6 | 2008-06-08 15:45:52 +0000 | [diff] [blame] | 423 | |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 424 | |
| 425 | /// SetFunctionDefinitionAttributes - Set attributes for a global. |
| 426 | /// |
| 427 | /// FIXME: This is currently only done for aliases and functions, but not for |
| 428 | /// variables (these details are set in EmitGlobalVarDefinition for variables). |
| 429 | void CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, |
| 430 | llvm::GlobalValue *GV) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 431 | SetCommonAttributes(D, GV); |
Nuno Lopes | d4cbda6 | 2008-06-08 15:45:52 +0000 | [diff] [blame] | 432 | } |
| 433 | |
Daniel Dunbar | 7dbd819 | 2009-04-14 07:08:30 +0000 | [diff] [blame] | 434 | void CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 435 | const CGFunctionInfo &Info, |
Daniel Dunbar | 7dbd819 | 2009-04-14 07:08:30 +0000 | [diff] [blame] | 436 | llvm::Function *F) { |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 437 | unsigned CallingConv; |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 438 | AttributeListType AttributeList; |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 439 | ConstructAttributeList(Info, D, AttributeList, CallingConv); |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 440 | F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 441 | AttributeList.size())); |
| 442 | F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 443 | } |
| 444 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 445 | void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, |
| 446 | llvm::Function *F) { |
Daniel Dunbar | 74ac74a | 2009-03-02 04:58:03 +0000 | [diff] [blame] | 447 | if (!Features.Exceptions && !Features.ObjCNonFragileABI) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 448 | F->addFnAttr(llvm::Attribute::NoUnwind); |
Daniel Dunbar | af668b0 | 2008-10-28 00:17:57 +0000 | [diff] [blame] | 449 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 450 | if (D->hasAttr<AlwaysInlineAttr>()) |
Daniel Dunbar | af668b0 | 2008-10-28 00:17:57 +0000 | [diff] [blame] | 451 | F->addFnAttr(llvm::Attribute::AlwaysInline); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 452 | |
Mike Stump | 1feade8 | 2009-08-26 22:31:08 +0000 | [diff] [blame] | 453 | if (D->hasAttr<NoInlineAttr>()) |
Anders Carlsson | 81ebbde | 2009-02-19 19:22:11 +0000 | [diff] [blame] | 454 | F->addFnAttr(llvm::Attribute::NoInline); |
Mike Stump | f55314d | 2009-10-05 21:58:44 +0000 | [diff] [blame] | 455 | |
Anders Carlsson | fd01535 | 2009-11-16 16:56:03 +0000 | [diff] [blame] | 456 | if (Features.getStackProtectorMode() == LangOptions::SSPOn) |
| 457 | F->addFnAttr(llvm::Attribute::StackProtect); |
| 458 | else if (Features.getStackProtectorMode() == LangOptions::SSPReq) |
| 459 | F->addFnAttr(llvm::Attribute::StackProtectReq); |
| 460 | |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 461 | if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) { |
| 462 | unsigned width = Context.Target.getCharWidth(); |
| 463 | F->setAlignment(AA->getAlignment() / width); |
| 464 | while ((AA = AA->getNext<AlignedAttr>())) |
| 465 | F->setAlignment(std::max(F->getAlignment(), AA->getAlignment() / width)); |
| 466 | } |
Mike Stump | fb51ddf | 2009-10-05 22:49:20 +0000 | [diff] [blame] | 467 | // C++ ABI requires 2-byte alignment for member functions. |
Mike Stump | bd6dbd1 | 2009-10-05 23:08:21 +0000 | [diff] [blame] | 468 | if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) |
| 469 | F->setAlignment(2); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 470 | } |
| 471 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 472 | void CodeGenModule::SetCommonAttributes(const Decl *D, |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 473 | llvm::GlobalValue *GV) { |
| 474 | setGlobalVisibility(GV, D); |
| 475 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 476 | if (D->hasAttr<UsedAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 477 | AddUsedGlobal(GV); |
| 478 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 479 | if (const SectionAttr *SA = D->getAttr<SectionAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 480 | GV->setSection(SA->getName()); |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 481 | |
| 482 | getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 483 | } |
| 484 | |
Daniel Dunbar | 0e4f40e | 2009-04-17 00:48:04 +0000 | [diff] [blame] | 485 | void CodeGenModule::SetInternalFunctionAttributes(const Decl *D, |
| 486 | llvm::Function *F, |
| 487 | const CGFunctionInfo &FI) { |
| 488 | SetLLVMFunctionAttributes(D, FI, F); |
| 489 | SetLLVMFunctionAttributesForDefinition(D, F); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 490 | |
| 491 | F->setLinkage(llvm::Function::InternalLinkage); |
| 492 | |
Daniel Dunbar | 0e4f40e | 2009-04-17 00:48:04 +0000 | [diff] [blame] | 493 | SetCommonAttributes(D, F); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 494 | } |
| 495 | |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 496 | void CodeGenModule::SetFunctionAttributes(GlobalDecl GD, |
Eli Friedman | c6c14d1 | 2009-05-26 01:22:57 +0000 | [diff] [blame] | 497 | llvm::Function *F, |
| 498 | bool IsIncompleteFunction) { |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 499 | const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); |
| 500 | |
Eli Friedman | c6c14d1 | 2009-05-26 01:22:57 +0000 | [diff] [blame] | 501 | if (!IsIncompleteFunction) |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 502 | SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 503 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 504 | // Only a few attributes are set on declarations; these may later be |
| 505 | // overridden by a definition. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 506 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 507 | if (FD->hasAttr<DLLImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 508 | F->setLinkage(llvm::Function::DLLImportLinkage); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 509 | } else if (FD->hasAttr<WeakAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 510 | FD->hasAttr<WeakImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 511 | // "extern_weak" is overloaded in LLVM; we probably should have |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 512 | // separate linkage types for this. |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 513 | F->setLinkage(llvm::Function::ExternalWeakLinkage); |
| 514 | } else { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 515 | F->setLinkage(llvm::Function::ExternalLinkage); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 516 | } |
| 517 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 518 | if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 519 | F->setSection(SA->getName()); |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 520 | } |
| 521 | |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 522 | void CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 523 | assert(!GV->isDeclaration() && |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 524 | "Only globals with definition can force usage."); |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 525 | LLVMUsed.push_back(GV); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 526 | } |
| 527 | |
| 528 | void CodeGenModule::EmitLLVMUsed() { |
| 529 | // Don't create llvm.used if there is no need. |
Chris Lattner | ad64e02 | 2009-07-17 23:57:13 +0000 | [diff] [blame] | 530 | if (LLVMUsed.empty()) |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 531 | return; |
| 532 | |
Benjamin Kramer | 3c0ef8c | 2009-10-13 10:07:13 +0000 | [diff] [blame] | 533 | const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 534 | |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 535 | // Convert LLVMUsed to what ConstantArray needs. |
| 536 | std::vector<llvm::Constant*> UsedArray; |
| 537 | UsedArray.resize(LLVMUsed.size()); |
| 538 | for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 539 | UsedArray[i] = |
| 540 | llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 541 | i8PTy); |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 542 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 543 | |
Fariborz Jahanian | c38e9af | 2009-06-23 21:47:46 +0000 | [diff] [blame] | 544 | if (UsedArray.empty()) |
| 545 | return; |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 546 | llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 547 | |
| 548 | llvm::GlobalVariable *GV = |
| 549 | new llvm::GlobalVariable(getModule(), ATy, false, |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 550 | llvm::GlobalValue::AppendingLinkage, |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 551 | llvm::ConstantArray::get(ATy, UsedArray), |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 552 | "llvm.used"); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 553 | |
| 554 | GV->setSection("llvm.metadata"); |
| 555 | } |
| 556 | |
| 557 | void CodeGenModule::EmitDeferred() { |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 558 | // Emit code for any potentially referenced deferred decls. Since a |
| 559 | // previously unused static decl may become used during the generation of code |
| 560 | // for a static function, iterate until no changes are made. |
Rafael Espindola | bbf58bb | 2010-03-10 02:19:29 +0000 | [diff] [blame] | 561 | |
Anders Carlsson | 046c294 | 2010-04-17 20:15:18 +0000 | [diff] [blame] | 562 | while (!DeferredDeclsToEmit.empty() || !DeferredVTables.empty()) { |
| 563 | if (!DeferredVTables.empty()) { |
| 564 | const CXXRecordDecl *RD = DeferredVTables.back(); |
| 565 | DeferredVTables.pop_back(); |
| 566 | getVTables().GenerateClassData(getVTableLinkage(RD), RD); |
Rafael Espindola | bbf58bb | 2010-03-10 02:19:29 +0000 | [diff] [blame] | 567 | continue; |
| 568 | } |
| 569 | |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 570 | GlobalDecl D = DeferredDeclsToEmit.back(); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 571 | DeferredDeclsToEmit.pop_back(); |
| 572 | |
John McCall | c76702c | 2010-05-27 01:45:30 +0000 | [diff] [blame] | 573 | // Check to see if we've already emitted this. This is necessary |
| 574 | // for a couple of reasons: first, decls can end up in the |
| 575 | // deferred-decls queue multiple times, and second, decls can end |
| 576 | // up with definitions in unusual ways (e.g. by an extern inline |
| 577 | // function acquiring a strong function redefinition). Just |
| 578 | // ignore these cases. |
| 579 | // |
| 580 | // TODO: That said, looking this up multiple times is very wasteful. |
Anders Carlsson | 9a20d55 | 2010-06-22 16:16:50 +0000 | [diff] [blame] | 581 | llvm::StringRef Name = getMangledName(D); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 582 | llvm::GlobalValue *CGRef = GetGlobalValue(Name); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 583 | assert(CGRef && "Deferred decl wasn't referenced?"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 584 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 585 | if (!CGRef->isDeclaration()) |
| 586 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 587 | |
John McCall | c76702c | 2010-05-27 01:45:30 +0000 | [diff] [blame] | 588 | // GlobalAlias::isDeclaration() defers to the aliasee, but for our |
| 589 | // purposes an alias counts as a definition. |
| 590 | if (isa<llvm::GlobalAlias>(CGRef)) |
| 591 | continue; |
| 592 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 593 | // Otherwise, emit the definition and move on to the next one. |
| 594 | EmitGlobalDefinition(D); |
| 595 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 596 | } |
| 597 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 598 | /// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 599 | /// annotation information for a given GlobalValue. The annotation struct is |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 600 | /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the |
| 601 | /// GlobalValue being annotated. The second field is the constant string |
| 602 | /// created from the AnnotateAttr's annotation. The third field is a constant |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 603 | /// string containing the name of the translation unit. The fourth field is |
| 604 | /// the line number in the file of the annotated value declaration. |
| 605 | /// |
| 606 | /// FIXME: this does not unique the annotation string constants, as llvm-gcc |
| 607 | /// appears to. |
| 608 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 609 | llvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 610 | const AnnotateAttr *AA, |
| 611 | unsigned LineNo) { |
| 612 | llvm::Module *M = &getModule(); |
| 613 | |
| 614 | // get [N x i8] constants for the annotation string, and the filename string |
| 615 | // which are the 2nd and 3rd elements of the global annotation structure. |
Benjamin Kramer | 3c0ef8c | 2009-10-13 10:07:13 +0000 | [diff] [blame] | 616 | const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 617 | llvm::Constant *anno = llvm::ConstantArray::get(VMContext, |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 618 | AA->getAnnotation(), true); |
| 619 | llvm::Constant *unit = llvm::ConstantArray::get(VMContext, |
| 620 | M->getModuleIdentifier(), |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 621 | true); |
| 622 | |
| 623 | // Get the two global values corresponding to the ConstantArrays we just |
| 624 | // created to hold the bytes of the strings. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 625 | llvm::GlobalValue *annoGV = |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 626 | new llvm::GlobalVariable(*M, anno->getType(), false, |
| 627 | llvm::GlobalValue::PrivateLinkage, anno, |
| 628 | GV->getName()); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 629 | // translation unit name string, emitted into the llvm.metadata section. |
| 630 | llvm::GlobalValue *unitGV = |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 631 | new llvm::GlobalVariable(*M, unit->getType(), false, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 632 | llvm::GlobalValue::PrivateLinkage, unit, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 633 | ".str"); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 634 | |
Daniel Dunbar | 57d5cee | 2009-04-14 22:41:13 +0000 | [diff] [blame] | 635 | // Create the ConstantStruct for the global annotation. |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 636 | llvm::Constant *Fields[4] = { |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 637 | llvm::ConstantExpr::getBitCast(GV, SBP), |
| 638 | llvm::ConstantExpr::getBitCast(annoGV, SBP), |
| 639 | llvm::ConstantExpr::getBitCast(unitGV, SBP), |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 640 | llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 641 | }; |
Owen Anderson | 47a434f | 2009-08-05 23:18:46 +0000 | [diff] [blame] | 642 | return llvm::ConstantStruct::get(VMContext, Fields, 4, false); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 643 | } |
| 644 | |
Argyrios Kyrtzidis | a6d6af3 | 2010-07-27 22:37:14 +0000 | [diff] [blame] | 645 | bool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { |
Argyrios Kyrtzidis | 90e99a8 | 2010-07-29 18:15:58 +0000 | [diff] [blame] | 646 | // Never defer when EmitAllDecls is specified. |
| 647 | if (Features.EmitAllDecls) |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 648 | return false; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 649 | |
Argyrios Kyrtzidis | 4ac7c0b | 2010-07-29 20:08:05 +0000 | [diff] [blame] | 650 | return !getContext().DeclMustBeEmitted(Global); |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 651 | } |
| 652 | |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 653 | llvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { |
| 654 | const AliasAttr *AA = VD->getAttr<AliasAttr>(); |
| 655 | assert(AA && "No alias?"); |
| 656 | |
| 657 | const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); |
| 658 | |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 659 | // 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] | 660 | llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 661 | |
| 662 | llvm::Constant *Aliasee; |
| 663 | if (isa<llvm::FunctionType>(DeclTy)) |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 664 | Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl()); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 665 | else |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 666 | Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 667 | llvm::PointerType::getUnqual(DeclTy), 0); |
| 668 | if (!Entry) { |
| 669 | llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); |
| 670 | F->setLinkage(llvm::Function::ExternalWeakLinkage); |
| 671 | WeakRefReferences.insert(F); |
| 672 | } |
| 673 | |
| 674 | return Aliasee; |
| 675 | } |
| 676 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 677 | void CodeGenModule::EmitGlobal(GlobalDecl GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 678 | const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 679 | |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 680 | // Weak references don't produce any output by themselves. |
| 681 | if (Global->hasAttr<WeakRefAttr>()) |
| 682 | return; |
| 683 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 684 | // If this is an alias definition (which otherwise looks like a declaration) |
| 685 | // emit it now. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 686 | if (Global->hasAttr<AliasAttr>()) |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 687 | return EmitAliasDefinition(GD); |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 688 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 689 | // Ignore declarations, they will be emitted on their first use. |
Daniel Dunbar | 5e1e1f9 | 2009-03-19 08:27:24 +0000 | [diff] [blame] | 690 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { |
Daniel Dunbar | 754b9fb | 2010-07-16 00:00:19 +0000 | [diff] [blame] | 691 | if (FD->getIdentifier()) { |
| 692 | llvm::StringRef Name = FD->getName(); |
| 693 | if (Name == "_Block_object_assign") { |
| 694 | BlockObjectAssignDecl = FD; |
| 695 | } else if (Name == "_Block_object_dispose") { |
| 696 | BlockObjectDisposeDecl = FD; |
| 697 | } |
| 698 | } |
| 699 | |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 700 | // Forward declarations are emitted lazily on first use. |
| 701 | if (!FD->isThisDeclarationADefinition()) |
| 702 | return; |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 703 | } else { |
| 704 | const VarDecl *VD = cast<VarDecl>(Global); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 705 | assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); |
| 706 | |
Daniel Dunbar | 754b9fb | 2010-07-16 00:00:19 +0000 | [diff] [blame] | 707 | if (VD->getIdentifier()) { |
| 708 | llvm::StringRef Name = VD->getName(); |
| 709 | if (Name == "_NSConcreteGlobalBlock") { |
| 710 | NSConcreteGlobalBlockDecl = VD; |
| 711 | } else if (Name == "_NSConcreteStackBlock") { |
| 712 | NSConcreteStackBlockDecl = VD; |
| 713 | } |
| 714 | } |
| 715 | |
| 716 | |
Douglas Gregor | a9a55c0 | 2010-02-06 05:15:45 +0000 | [diff] [blame] | 717 | if (VD->isThisDeclarationADefinition() != VarDecl::Definition) |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 718 | return; |
Nate Begeman | 4c13b7a | 2008-04-20 06:29:50 +0000 | [diff] [blame] | 719 | } |
| 720 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 721 | // Defer code generation when possible if this is a static definition, inline |
| 722 | // function etc. These we only want to emit if they are used. |
Chris Lattner | 4357a82 | 2010-04-13 17:39:09 +0000 | [diff] [blame] | 723 | if (!MayDeferGeneration(Global)) { |
| 724 | // Emit the definition if it can't be deferred. |
| 725 | EmitGlobalDefinition(GD); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 726 | return; |
| 727 | } |
John McCall | bf40cb5 | 2010-07-15 23:40:35 +0000 | [diff] [blame] | 728 | |
| 729 | // If we're deferring emission of a C++ variable with an |
| 730 | // initializer, remember the order in which it appeared in the file. |
| 731 | if (getLangOptions().CPlusPlus && isa<VarDecl>(Global) && |
| 732 | cast<VarDecl>(Global)->hasInit()) { |
| 733 | DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); |
| 734 | CXXGlobalInits.push_back(0); |
| 735 | } |
Chris Lattner | 4357a82 | 2010-04-13 17:39:09 +0000 | [diff] [blame] | 736 | |
| 737 | // If the value has already been used, add it directly to the |
| 738 | // DeferredDeclsToEmit list. |
Anders Carlsson | 9a20d55 | 2010-06-22 16:16:50 +0000 | [diff] [blame] | 739 | llvm::StringRef MangledName = getMangledName(GD); |
Chris Lattner | 4357a82 | 2010-04-13 17:39:09 +0000 | [diff] [blame] | 740 | if (GetGlobalValue(MangledName)) |
| 741 | DeferredDeclsToEmit.push_back(GD); |
| 742 | else { |
| 743 | // Otherwise, remember that we saw a deferred decl with this name. The |
| 744 | // first use of the mangled name will cause it to move into |
| 745 | // DeferredDeclsToEmit. |
| 746 | DeferredDecls[MangledName] = GD; |
| 747 | } |
Nate Begeman | 4c13b7a | 2008-04-20 06:29:50 +0000 | [diff] [blame] | 748 | } |
| 749 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 750 | void CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 751 | const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 752 | |
Dan Gohman | cb421fa | 2010-04-19 16:39:44 +0000 | [diff] [blame] | 753 | PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), |
Anders Carlsson | 8e2efcc | 2009-10-27 14:32:27 +0000 | [diff] [blame] | 754 | Context.getSourceManager(), |
| 755 | "Generating code for declaration"); |
| 756 | |
Douglas Gregor | 44eac33 | 2010-07-13 06:02:28 +0000 | [diff] [blame] | 757 | if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { |
| 758 | // At -O0, don't generate IR for functions with available_externally |
| 759 | // linkage. |
Douglas Gregor | 7feaeee | 2010-07-15 22:58:18 +0000 | [diff] [blame] | 760 | if (CodeGenOpts.OptimizationLevel == 0 && |
| 761 | !Function->hasAttr<AlwaysInlineAttr>() && |
Douglas Gregor | 44eac33 | 2010-07-13 06:02:28 +0000 | [diff] [blame] | 762 | getFunctionLinkage(Function) |
| 763 | == llvm::Function::AvailableExternallyLinkage) |
| 764 | return; |
Anders Carlsson | 7270ee4 | 2010-03-23 04:31:31 +0000 | [diff] [blame] | 765 | |
Douglas Gregor | 44eac33 | 2010-07-13 06:02:28 +0000 | [diff] [blame] | 766 | if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { |
| 767 | if (Method->isVirtual()) |
| 768 | getVTables().EmitThunks(GD); |
| 769 | |
| 770 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) |
| 771 | return EmitCXXConstructor(CD, GD.getCtorType()); |
Chris Lattner | 4357a82 | 2010-04-13 17:39:09 +0000 | [diff] [blame] | 772 | |
Douglas Gregor | 44eac33 | 2010-07-13 06:02:28 +0000 | [diff] [blame] | 773 | if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(Method)) |
| 774 | return EmitCXXDestructor(DD, GD.getDtorType()); |
| 775 | } |
Chris Lattner | b5e8156 | 2010-04-13 17:57:11 +0000 | [diff] [blame] | 776 | |
Chris Lattner | b5e8156 | 2010-04-13 17:57:11 +0000 | [diff] [blame] | 777 | return EmitGlobalFunctionDefinition(GD); |
Douglas Gregor | 44eac33 | 2010-07-13 06:02:28 +0000 | [diff] [blame] | 778 | } |
Chris Lattner | b5e8156 | 2010-04-13 17:57:11 +0000 | [diff] [blame] | 779 | |
| 780 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) |
| 781 | return EmitGlobalVarDefinition(VD); |
Chris Lattner | 4357a82 | 2010-04-13 17:39:09 +0000 | [diff] [blame] | 782 | |
| 783 | assert(0 && "Invalid argument to EmitGlobalDefinition()"); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 784 | } |
| 785 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 786 | /// GetOrCreateLLVMFunction - If the specified mangled name is not in the |
| 787 | /// module, create and return an llvm Function with the specified type. If there |
| 788 | /// is something in the module with the specified name, return it potentially |
| 789 | /// bitcasted to the right type. |
| 790 | /// |
| 791 | /// If D is non-null, it specifies a decl that correspond to this. This is used |
| 792 | /// to set the attributes on the function when it is first created. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 793 | llvm::Constant * |
| 794 | CodeGenModule::GetOrCreateLLVMFunction(llvm::StringRef MangledName, |
| 795 | const llvm::Type *Ty, |
| 796 | GlobalDecl D) { |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 797 | // Lookup the entry, lazily creating it if necessary. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 798 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 799 | if (Entry) { |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 800 | if (WeakRefReferences.count(Entry)) { |
| 801 | const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); |
| 802 | if (FD && !FD->hasAttr<WeakAttr>()) |
Anders Carlsson | 7270ee4 | 2010-03-23 04:31:31 +0000 | [diff] [blame] | 803 | Entry->setLinkage(llvm::Function::ExternalLinkage); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 804 | |
| 805 | WeakRefReferences.erase(Entry); |
| 806 | } |
| 807 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 808 | if (Entry->getType()->getElementType() == Ty) |
| 809 | return Entry; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 810 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 811 | // Make sure the result is of the correct type. |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 812 | const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 813 | return llvm::ConstantExpr::getBitCast(Entry, PTy); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 814 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 815 | |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 816 | // This function doesn't have a complete type (for example, the return |
| 817 | // type is an incomplete struct). Use a fake type instead, and make |
| 818 | // sure not to try to set attributes. |
| 819 | bool IsIncompleteFunction = false; |
John McCall | 784f211 | 2010-04-28 00:00:30 +0000 | [diff] [blame] | 820 | |
| 821 | const llvm::FunctionType *FTy; |
| 822 | if (isa<llvm::FunctionType>(Ty)) { |
| 823 | FTy = cast<llvm::FunctionType>(Ty); |
| 824 | } else { |
| 825 | FTy = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), |
| 826 | std::vector<const llvm::Type*>(), false); |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 827 | IsIncompleteFunction = true; |
| 828 | } |
Chris Lattner | bcaedae | 2010-06-30 19:14:05 +0000 | [diff] [blame] | 829 | |
John McCall | 784f211 | 2010-04-28 00:00:30 +0000 | [diff] [blame] | 830 | llvm::Function *F = llvm::Function::Create(FTy, |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 831 | llvm::Function::ExternalLinkage, |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 832 | MangledName, &getModule()); |
| 833 | assert(F->getName() == MangledName && "name was uniqued!"); |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 834 | if (D.getDecl()) |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 835 | SetFunctionAttributes(D, F, IsIncompleteFunction); |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 836 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 837 | // This is the first use or definition of a mangled name. If there is a |
| 838 | // deferred decl with this name, remember that we need to emit it at the end |
| 839 | // of the file. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 840 | llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 841 | if (DDI != DeferredDecls.end()) { |
| 842 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit |
| 843 | // list, and remove it from DeferredDecls (since we don't need it anymore). |
| 844 | DeferredDeclsToEmit.push_back(DDI->second); |
| 845 | DeferredDecls.erase(DDI); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 846 | } else if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl())) { |
Chris Lattner | 0c337ed | 2009-05-12 21:02:27 +0000 | [diff] [blame] | 847 | // If this the first reference to a C++ inline function in a class, queue up |
| 848 | // the deferred function body for emission. These are not seen as |
| 849 | // top-level declarations. |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 850 | if (FD->isThisDeclarationADefinition() && MayDeferGeneration(FD)) |
| 851 | DeferredDeclsToEmit.push_back(D); |
Fariborz Jahanian | c7ff8e1 | 2009-07-30 23:22:00 +0000 | [diff] [blame] | 852 | // A called constructor which has no definition or declaration need be |
| 853 | // synthesized. |
| 854 | else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(FD)) { |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 855 | if (CD->isImplicit()) { |
Benjamin Kramer | d3a344c | 2010-03-06 09:07:19 +0000 | [diff] [blame] | 856 | assert(CD->isUsed() && "Sema doesn't consider constructor as used."); |
Eli Friedman | 15233e5 | 2009-11-26 07:40:08 +0000 | [diff] [blame] | 857 | DeferredDeclsToEmit.push_back(D); |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 858 | } |
Eli Friedman | 15233e5 | 2009-11-26 07:40:08 +0000 | [diff] [blame] | 859 | } else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(FD)) { |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 860 | if (DD->isImplicit()) { |
Benjamin Kramer | d3a344c | 2010-03-06 09:07:19 +0000 | [diff] [blame] | 861 | assert(DD->isUsed() && "Sema doesn't consider destructor as used."); |
Eli Friedman | 15233e5 | 2009-11-26 07:40:08 +0000 | [diff] [blame] | 862 | DeferredDeclsToEmit.push_back(D); |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 863 | } |
Eli Friedman | 15233e5 | 2009-11-26 07:40:08 +0000 | [diff] [blame] | 864 | } else if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 865 | if (MD->isCopyAssignment() && MD->isImplicit()) { |
Benjamin Kramer | d3a344c | 2010-03-06 09:07:19 +0000 | [diff] [blame] | 866 | assert(MD->isUsed() && "Sema doesn't consider CopyAssignment as used."); |
Fariborz Jahanian | c7ff8e1 | 2009-07-30 23:22:00 +0000 | [diff] [blame] | 867 | DeferredDeclsToEmit.push_back(D); |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 868 | } |
Fariborz Jahanian | c7ff8e1 | 2009-07-30 23:22:00 +0000 | [diff] [blame] | 869 | } |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 870 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 871 | |
John McCall | 784f211 | 2010-04-28 00:00:30 +0000 | [diff] [blame] | 872 | // Make sure the result is of the requested type. |
| 873 | if (!IsIncompleteFunction) { |
| 874 | assert(F->getType()->getElementType() == Ty); |
| 875 | return F; |
| 876 | } |
| 877 | |
| 878 | const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); |
| 879 | return llvm::ConstantExpr::getBitCast(F, PTy); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 880 | } |
| 881 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 882 | /// GetAddrOfFunction - Return the address of the given function. If Ty is |
| 883 | /// non-null, then this function will use the specified type if it has to |
| 884 | /// create it (this occurs when we see a definition of the function). |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 885 | llvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 886 | const llvm::Type *Ty) { |
| 887 | // If there was no specific requested type, just convert it now. |
| 888 | if (!Ty) |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 889 | Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); |
Chris Lattner | bcaedae | 2010-06-30 19:14:05 +0000 | [diff] [blame] | 890 | |
Anders Carlsson | 9a20d55 | 2010-06-22 16:16:50 +0000 | [diff] [blame] | 891 | llvm::StringRef MangledName = getMangledName(GD); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 892 | return GetOrCreateLLVMFunction(MangledName, Ty, GD); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 893 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 894 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 895 | /// CreateRuntimeFunction - Create a new runtime function with the specified |
| 896 | /// type and name. |
| 897 | llvm::Constant * |
| 898 | CodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 899 | llvm::StringRef Name) { |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 900 | return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 901 | } |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 902 | |
Eli Friedman | 20e098b | 2009-12-11 21:23:03 +0000 | [diff] [blame] | 903 | static bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D) { |
John McCall | 8878686 | 2010-02-08 21:46:50 +0000 | [diff] [blame] | 904 | if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) |
Eli Friedman | 20e098b | 2009-12-11 21:23:03 +0000 | [diff] [blame] | 905 | return false; |
| 906 | if (Context.getLangOptions().CPlusPlus && |
| 907 | Context.getBaseElementType(D->getType())->getAs<RecordType>()) { |
| 908 | // FIXME: We should do something fancier here! |
| 909 | return false; |
| 910 | } |
| 911 | return true; |
| 912 | } |
| 913 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 914 | /// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, |
| 915 | /// create and return an llvm GlobalVariable with the specified type. If there |
| 916 | /// is something in the module with the specified name, return it potentially |
| 917 | /// bitcasted to the right type. |
| 918 | /// |
| 919 | /// If D is non-null, it specifies a decl that correspond to this. This is used |
| 920 | /// to set the attributes on the global when it is first created. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 921 | llvm::Constant * |
| 922 | CodeGenModule::GetOrCreateLLVMGlobal(llvm::StringRef MangledName, |
| 923 | const llvm::PointerType *Ty, |
| 924 | const VarDecl *D) { |
Daniel Dunbar | 3c827a7 | 2008-08-05 23:31:02 +0000 | [diff] [blame] | 925 | // Lookup the entry, lazily creating it if necessary. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 926 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 927 | if (Entry) { |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 928 | if (WeakRefReferences.count(Entry)) { |
| 929 | if (D && !D->hasAttr<WeakAttr>()) |
Anders Carlsson | 7270ee4 | 2010-03-23 04:31:31 +0000 | [diff] [blame] | 930 | Entry->setLinkage(llvm::Function::ExternalLinkage); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 931 | |
| 932 | WeakRefReferences.erase(Entry); |
| 933 | } |
| 934 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 935 | if (Entry->getType() == Ty) |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 936 | return Entry; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 937 | |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 938 | // Make sure the result is of the correct type. |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 939 | return llvm::ConstantExpr::getBitCast(Entry, Ty); |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 940 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 941 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 942 | // This is the first use or definition of a mangled name. If there is a |
| 943 | // deferred decl with this name, remember that we need to emit it at the end |
| 944 | // of the file. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 945 | llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 946 | if (DDI != DeferredDecls.end()) { |
| 947 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit |
| 948 | // list, and remove it from DeferredDecls (since we don't need it anymore). |
| 949 | DeferredDeclsToEmit.push_back(DDI->second); |
| 950 | DeferredDecls.erase(DDI); |
| 951 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 952 | |
| 953 | llvm::GlobalVariable *GV = |
| 954 | new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 955 | llvm::GlobalValue::ExternalLinkage, |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 956 | 0, MangledName, 0, |
Eli Friedman | 56ebe50 | 2009-04-19 21:05:03 +0000 | [diff] [blame] | 957 | false, Ty->getAddressSpace()); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 958 | |
| 959 | // Handle things which are present even on external declarations. |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 960 | if (D) { |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 961 | // FIXME: This code is overly simple and should be merged with other global |
| 962 | // handling. |
Eli Friedman | 20e098b | 2009-12-11 21:23:03 +0000 | [diff] [blame] | 963 | GV->setConstant(DeclIsConstantGlobal(Context, D)); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 964 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 965 | // FIXME: Merge with other attribute handling code. |
| 966 | if (D->getStorageClass() == VarDecl::PrivateExtern) |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 967 | GV->setVisibility(llvm::GlobalValue::HiddenVisibility); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 968 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 969 | if (D->hasAttr<WeakAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 970 | D->hasAttr<WeakImportAttr>()) |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 971 | GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); |
Eli Friedman | 56ebe50 | 2009-04-19 21:05:03 +0000 | [diff] [blame] | 972 | |
| 973 | GV->setThreadLocal(D->isThreadSpecified()); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 974 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 975 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 976 | return GV; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 977 | } |
| 978 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 979 | |
| 980 | /// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the |
| 981 | /// given global variable. If Ty is non-null and if the global doesn't exist, |
| 982 | /// then it will be greated with the specified type instead of whatever the |
| 983 | /// normal requested type would be. |
| 984 | llvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, |
| 985 | const llvm::Type *Ty) { |
| 986 | assert(D->hasGlobalStorage() && "Not a global variable"); |
| 987 | QualType ASTTy = D->getType(); |
| 988 | if (Ty == 0) |
| 989 | Ty = getTypes().ConvertTypeForMem(ASTTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 990 | |
| 991 | const llvm::PointerType *PTy = |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 992 | llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 993 | |
Anders Carlsson | 9a20d55 | 2010-06-22 16:16:50 +0000 | [diff] [blame] | 994 | llvm::StringRef MangledName = getMangledName(D); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 995 | return GetOrCreateLLVMGlobal(MangledName, PTy, D); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 996 | } |
| 997 | |
| 998 | /// CreateRuntimeVariable - Create a new runtime global variable with the |
| 999 | /// specified type and name. |
| 1000 | llvm::Constant * |
| 1001 | CodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1002 | llvm::StringRef Name) { |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1003 | return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1004 | } |
| 1005 | |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 1006 | void CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { |
| 1007 | assert(!D->getInit() && "Cannot emit definite definitions here!"); |
| 1008 | |
Douglas Gregor | 7520bd1 | 2009-04-21 19:28:58 +0000 | [diff] [blame] | 1009 | if (MayDeferGeneration(D)) { |
| 1010 | // If we have not seen a reference to this variable yet, place it |
| 1011 | // into the deferred declarations table to be emitted if needed |
| 1012 | // later. |
Anders Carlsson | 9a20d55 | 2010-06-22 16:16:50 +0000 | [diff] [blame] | 1013 | llvm::StringRef MangledName = getMangledName(D); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1014 | if (!GetGlobalValue(MangledName)) { |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 1015 | DeferredDecls[MangledName] = D; |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 1016 | return; |
Douglas Gregor | 7520bd1 | 2009-04-21 19:28:58 +0000 | [diff] [blame] | 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | // The tentative definition is the only definition. |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 1021 | EmitGlobalVarDefinition(D); |
| 1022 | } |
| 1023 | |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 1024 | void CodeGenModule::EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired) { |
| 1025 | if (DefinitionRequired) |
| 1026 | getVTables().GenerateClassData(getVTableLinkage(Class), Class); |
| 1027 | } |
| 1028 | |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 1029 | llvm::GlobalVariable::LinkageTypes |
Anders Carlsson | 046c294 | 2010-04-17 20:15:18 +0000 | [diff] [blame] | 1030 | CodeGenModule::getVTableLinkage(const CXXRecordDecl *RD) { |
Douglas Gregor | dffb801 | 2010-01-06 22:00:56 +0000 | [diff] [blame] | 1031 | if (RD->isInAnonymousNamespace() || !RD->hasLinkage()) |
| 1032 | return llvm::GlobalVariable::InternalLinkage; |
| 1033 | |
| 1034 | if (const CXXMethodDecl *KeyFunction |
| 1035 | = RD->getASTContext().getKeyFunction(RD)) { |
| 1036 | // If this class has a key function, use that to determine the linkage of |
| 1037 | // the vtable. |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 1038 | const FunctionDecl *Def = 0; |
Argyrios Kyrtzidis | 06a54a3 | 2010-07-07 11:31:19 +0000 | [diff] [blame] | 1039 | if (KeyFunction->hasBody(Def)) |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 1040 | KeyFunction = cast<CXXMethodDecl>(Def); |
Douglas Gregor | dffb801 | 2010-01-06 22:00:56 +0000 | [diff] [blame] | 1041 | |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 1042 | switch (KeyFunction->getTemplateSpecializationKind()) { |
| 1043 | case TSK_Undeclared: |
| 1044 | case TSK_ExplicitSpecialization: |
| 1045 | if (KeyFunction->isInlined()) |
| 1046 | return llvm::GlobalVariable::WeakODRLinkage; |
| 1047 | |
| 1048 | return llvm::GlobalVariable::ExternalLinkage; |
| 1049 | |
| 1050 | case TSK_ImplicitInstantiation: |
| 1051 | case TSK_ExplicitInstantiationDefinition: |
| 1052 | return llvm::GlobalVariable::WeakODRLinkage; |
| 1053 | |
| 1054 | case TSK_ExplicitInstantiationDeclaration: |
| 1055 | // FIXME: Use available_externally linkage. However, this currently |
| 1056 | // breaks LLVM's build due to undefined symbols. |
| 1057 | // return llvm::GlobalVariable::AvailableExternallyLinkage; |
| 1058 | return llvm::GlobalVariable::WeakODRLinkage; |
| 1059 | } |
Douglas Gregor | dffb801 | 2010-01-06 22:00:56 +0000 | [diff] [blame] | 1060 | } |
| 1061 | |
| 1062 | switch (RD->getTemplateSpecializationKind()) { |
| 1063 | case TSK_Undeclared: |
| 1064 | case TSK_ExplicitSpecialization: |
| 1065 | case TSK_ImplicitInstantiation: |
| 1066 | case TSK_ExplicitInstantiationDefinition: |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 1067 | return llvm::GlobalVariable::WeakODRLinkage; |
Douglas Gregor | dffb801 | 2010-01-06 22:00:56 +0000 | [diff] [blame] | 1068 | |
| 1069 | case TSK_ExplicitInstantiationDeclaration: |
| 1070 | // FIXME: Use available_externally linkage. However, this currently |
| 1071 | // breaks LLVM's build due to undefined symbols. |
| 1072 | // return llvm::GlobalVariable::AvailableExternallyLinkage; |
| 1073 | return llvm::GlobalVariable::WeakODRLinkage; |
Douglas Gregor | 4b0f21c | 2010-01-06 20:27:16 +0000 | [diff] [blame] | 1074 | } |
| 1075 | |
| 1076 | // Silence GCC warning. |
| 1077 | return llvm::GlobalVariable::WeakODRLinkage; |
| 1078 | } |
| 1079 | |
Ken Dyck | 687cc4a | 2010-01-26 13:48:07 +0000 | [diff] [blame] | 1080 | CharUnits CodeGenModule::GetTargetTypeStoreSize(const llvm::Type *Ty) const { |
| 1081 | return CharUnits::fromQuantity( |
| 1082 | TheTargetData.getTypeStoreSizeInBits(Ty) / Context.getCharWidth()); |
| 1083 | } |
| 1084 | |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1085 | void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { |
Chris Lattner | 8f32f71 | 2007-07-14 00:23:28 +0000 | [diff] [blame] | 1086 | llvm::Constant *Init = 0; |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1087 | QualType ASTTy = D->getType(); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 1088 | bool NonConstInit = false; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1089 | |
Sebastian Redl | 31310a2 | 2010-02-01 20:16:42 +0000 | [diff] [blame] | 1090 | const Expr *InitExpr = D->getAnyInitializer(); |
Anders Carlsson | 3bb9269 | 2010-01-26 17:43:42 +0000 | [diff] [blame] | 1091 | |
| 1092 | if (!InitExpr) { |
Eli Friedman | cd5f4aa | 2008-05-30 20:39:54 +0000 | [diff] [blame] | 1093 | // This is a tentative definition; tentative definitions are |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 1094 | // implicitly initialized with { 0 }. |
| 1095 | // |
| 1096 | // Note that tentative definitions are only emitted at the end of |
| 1097 | // a translation unit, so they should never have incomplete |
| 1098 | // type. In addition, EmitTentativeDefinition makes sure that we |
| 1099 | // never attempt to emit a tentative definition if a real one |
| 1100 | // exists. A use may still exists, however, so we still may need |
| 1101 | // to do a RAUW. |
| 1102 | assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); |
Anders Carlsson | b0d0ea0 | 2009-08-02 21:18:22 +0000 | [diff] [blame] | 1103 | Init = EmitNullConstant(D->getType()); |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1104 | } else { |
Douglas Gregor | c446d18 | 2010-05-05 20:15:55 +0000 | [diff] [blame] | 1105 | Init = EmitConstantExpr(InitExpr, D->getType()); |
Eli Friedman | 6e656f4 | 2009-02-20 01:18:21 +0000 | [diff] [blame] | 1106 | if (!Init) { |
Anders Carlsson | 3bb9269 | 2010-01-26 17:43:42 +0000 | [diff] [blame] | 1107 | QualType T = InitExpr->getType(); |
Douglas Gregor | c446d18 | 2010-05-05 20:15:55 +0000 | [diff] [blame] | 1108 | if (D->getType()->isReferenceType()) |
| 1109 | T = D->getType(); |
| 1110 | |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 1111 | if (getLangOptions().CPlusPlus) { |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 1112 | EmitCXXGlobalVarDeclInitFunc(D); |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 1113 | Init = EmitNullConstant(T); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 1114 | NonConstInit = true; |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 1115 | } else { |
| 1116 | ErrorUnsupported(D, "static initializer"); |
| 1117 | Init = llvm::UndefValue::get(getTypes().ConvertType(T)); |
| 1118 | } |
John McCall | bf40cb5 | 2010-07-15 23:40:35 +0000 | [diff] [blame] | 1119 | } else { |
| 1120 | // We don't need an initializer, so remove the entry for the delayed |
| 1121 | // initializer position (just in case this entry was delayed). |
| 1122 | if (getLangOptions().CPlusPlus) |
| 1123 | DelayedCXXInitPosition.erase(D); |
Eli Friedman | 6e656f4 | 2009-02-20 01:18:21 +0000 | [diff] [blame] | 1124 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1125 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1126 | |
Chris Lattner | 2d58406 | 2009-03-21 08:13:05 +0000 | [diff] [blame] | 1127 | const llvm::Type* InitType = Init->getType(); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1128 | llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1129 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1130 | // Strip off a bitcast if we got one back. |
| 1131 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1132 | assert(CE->getOpcode() == llvm::Instruction::BitCast || |
| 1133 | // all zero index gep. |
| 1134 | CE->getOpcode() == llvm::Instruction::GetElementPtr); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1135 | Entry = CE->getOperand(0); |
| 1136 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1137 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1138 | // Entry is now either a Function or GlobalVariable. |
| 1139 | llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1140 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1141 | // We have a definition after a declaration with the wrong type. |
| 1142 | // We must make a new GlobalVariable* and update everything that used OldGV |
| 1143 | // (a declaration or tentative definition) with the new GlobalVariable* |
| 1144 | // (which will be a definition). |
| 1145 | // |
| 1146 | // This happens if there is a prototype for a global (e.g. |
| 1147 | // "extern int x[];") and then a definition of a different type (e.g. |
| 1148 | // "int x[10];"). This also happens when an initializer has a different type |
| 1149 | // from the type of the global (this happens with unions). |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1150 | if (GV == 0 || |
| 1151 | GV->getType()->getElementType() != InitType || |
| 1152 | GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1153 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1154 | // Move the old entry aside so that we'll create a new one. |
| 1155 | Entry->setName(llvm::StringRef()); |
Daniel Dunbar | 232350d | 2009-02-19 05:36:41 +0000 | [diff] [blame] | 1156 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1157 | // Make a new global with the correct type, this is now guaranteed to work. |
| 1158 | GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1159 | |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1160 | // Replace all uses of the old global with the new global |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1161 | llvm::Constant *NewPtrForOldDecl = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1162 | llvm::ConstantExpr::getBitCast(GV, Entry->getType()); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1163 | Entry->replaceAllUsesWith(NewPtrForOldDecl); |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1164 | |
| 1165 | // Erase the old global, since it is no longer used. |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1166 | cast<llvm::GlobalValue>(Entry)->eraseFromParent(); |
Chris Lattner | 8f32f71 | 2007-07-14 00:23:28 +0000 | [diff] [blame] | 1167 | } |
Devang Patel | 8e53e72 | 2007-10-26 16:31:40 +0000 | [diff] [blame] | 1168 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1169 | if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1170 | SourceManager &SM = Context.getSourceManager(); |
| 1171 | AddAnnotation(EmitAnnotateAttr(GV, AA, |
Chris Lattner | f7cf85b | 2009-01-16 07:36:28 +0000 | [diff] [blame] | 1172 | SM.getInstantiationLineNumber(D->getLocation()))); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1173 | } |
| 1174 | |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1175 | GV->setInitializer(Init); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1176 | |
| 1177 | // If it is safe to mark the global 'constant', do so now. |
| 1178 | GV->setConstant(false); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 1179 | if (!NonConstInit && DeclIsConstantGlobal(Context, D)) |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1180 | GV->setConstant(true); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1181 | |
Ken Dyck | 8b752f1 | 2010-01-27 17:10:57 +0000 | [diff] [blame] | 1182 | GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); |
Eli Friedman | 08d7802 | 2008-05-29 11:10:27 +0000 | [diff] [blame] | 1183 | |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1184 | // Set the llvm linkage type as appropriate. |
Argyrios Kyrtzidis | 90e99a8 | 2010-07-29 18:15:58 +0000 | [diff] [blame] | 1185 | GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); |
Douglas Gregor | a0f00a7 | 2009-10-14 21:36:34 +0000 | [diff] [blame] | 1186 | if (Linkage == GVA_Internal) |
Chris Lattner | 8fabd78 | 2008-05-04 01:44:26 +0000 | [diff] [blame] | 1187 | GV->setLinkage(llvm::Function::InternalLinkage); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1188 | else if (D->hasAttr<DLLImportAttr>()) |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1189 | GV->setLinkage(llvm::Function::DLLImportLinkage); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1190 | else if (D->hasAttr<DLLExportAttr>()) |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1191 | GV->setLinkage(llvm::Function::DLLExportLinkage); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1192 | else if (D->hasAttr<WeakAttr>()) { |
| 1193 | if (GV->isConstant()) |
| 1194 | GV->setLinkage(llvm::GlobalVariable::WeakODRLinkage); |
| 1195 | else |
| 1196 | GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); |
Douglas Gregor | 8f51a4f | 2010-03-13 18:23:07 +0000 | [diff] [blame] | 1197 | } else if (Linkage == GVA_TemplateInstantiation || |
| 1198 | Linkage == GVA_ExplicitTemplateInstantiation) |
| 1199 | // FIXME: It seems like we can provide more specific linkage here |
| 1200 | // (LinkOnceODR, WeakODR). |
Douglas Gregor | 1028c9f | 2009-10-14 21:29:40 +0000 | [diff] [blame] | 1201 | GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); |
Daniel Dunbar | 1bc5c03 | 2009-11-30 08:40:34 +0000 | [diff] [blame] | 1202 | else if (!getLangOptions().CPlusPlus && !CodeGenOpts.NoCommon && |
Chris Lattner | 309457d | 2009-08-05 04:56:58 +0000 | [diff] [blame] | 1203 | !D->hasExternalStorage() && !D->getInit() && |
Eric Christopher | 91f31dc | 2010-08-08 01:37:14 +0000 | [diff] [blame^] | 1204 | !D->getAttr<SectionAttr>() && !D->isThreadSpecified()) { |
| 1205 | // Thread local vars aren't considered common linkage. |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1206 | GV->setLinkage(llvm::GlobalVariable::CommonLinkage); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1207 | // common vars aren't constant even if declared const. |
| 1208 | GV->setConstant(false); |
| 1209 | } else |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1210 | GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 1211 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1212 | SetCommonAttributes(D, GV); |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1213 | |
Sanjiv Gupta | 686226b | 2008-06-05 08:59:10 +0000 | [diff] [blame] | 1214 | // Emit global variable debug information. |
Chris Lattner | 2d58406 | 2009-03-21 08:13:05 +0000 | [diff] [blame] | 1215 | if (CGDebugInfo *DI = getDebugInfo()) { |
Daniel Dunbar | 66031a5 | 2008-10-17 16:15:48 +0000 | [diff] [blame] | 1216 | DI->setLocation(D->getLocation()); |
Sanjiv Gupta | 686226b | 2008-06-05 08:59:10 +0000 | [diff] [blame] | 1217 | DI->EmitGlobalVariable(GV, D); |
| 1218 | } |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1219 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1220 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1221 | /// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we |
| 1222 | /// implement a function with no prototype, e.g. "int foo() {}". If there are |
| 1223 | /// existing call uses of the old function in the module, this adjusts them to |
| 1224 | /// call the new function directly. |
| 1225 | /// |
| 1226 | /// This is not just a cleanup: the always_inline pass requires direct calls to |
| 1227 | /// functions to be able to inline them. If there is a bitcast in the way, it |
| 1228 | /// won't inline them. Instcombine normally deletes these calls, but it isn't |
| 1229 | /// run at -O0. |
| 1230 | static void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, |
| 1231 | llvm::Function *NewFn) { |
| 1232 | // If we're redefining a global as a function, don't transform it. |
| 1233 | llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); |
| 1234 | if (OldFn == 0) return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1235 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1236 | const llvm::Type *NewRetTy = NewFn->getReturnType(); |
| 1237 | llvm::SmallVector<llvm::Value*, 4> ArgList; |
| 1238 | |
| 1239 | for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); |
Benjamin Kramer | dbf02bc | 2010-04-10 11:02:40 +0000 | [diff] [blame] | 1240 | UI != E; ) { |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1241 | // TODO: Do invokes ever occur in C code? If so, we should handle them too. |
Benjamin Kramer | dbf02bc | 2010-04-10 11:02:40 +0000 | [diff] [blame] | 1242 | llvm::Value::use_iterator I = UI++; // Increment before the CI is erased. |
| 1243 | llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*I); |
Gabor Greif | 8670cd3 | 2010-07-28 09:19:33 +0000 | [diff] [blame] | 1244 | if (!CI) continue; // FIXME: when we allow Invoke, just do CallSite CS(*I) |
Gabor Greif | 35db3b9 | 2010-04-10 03:45:50 +0000 | [diff] [blame] | 1245 | llvm::CallSite CS(CI); |
Benjamin Kramer | dbf02bc | 2010-04-10 11:02:40 +0000 | [diff] [blame] | 1246 | if (!CI || !CS.isCallee(I)) continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1247 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1248 | // If the return types don't match exactly, and if the call isn't dead, then |
| 1249 | // we can't transform this call. |
| 1250 | if (CI->getType() != NewRetTy && !CI->use_empty()) |
| 1251 | continue; |
| 1252 | |
| 1253 | // If the function was passed too few arguments, don't transform. If extra |
| 1254 | // arguments were passed, we silently drop them. If any of the types |
| 1255 | // mismatch, we don't transform. |
| 1256 | unsigned ArgNo = 0; |
| 1257 | bool DontTransform = false; |
| 1258 | for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), |
| 1259 | E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { |
Gabor Greif | 35db3b9 | 2010-04-10 03:45:50 +0000 | [diff] [blame] | 1260 | if (CS.arg_size() == ArgNo || |
| 1261 | CS.getArgument(ArgNo)->getType() != AI->getType()) { |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1262 | DontTransform = true; |
| 1263 | break; |
| 1264 | } |
| 1265 | } |
| 1266 | if (DontTransform) |
| 1267 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1268 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1269 | // Okay, we can transform this. Create the new call instruction and copy |
| 1270 | // over the required information. |
Gabor Greif | 6ba728d | 2010-04-10 02:56:12 +0000 | [diff] [blame] | 1271 | ArgList.append(CS.arg_begin(), CS.arg_begin() + ArgNo); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1272 | llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), |
| 1273 | ArgList.end(), "", CI); |
| 1274 | ArgList.clear(); |
Benjamin Kramer | ffbb15e | 2009-10-05 13:47:21 +0000 | [diff] [blame] | 1275 | if (!NewCall->getType()->isVoidTy()) |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1276 | NewCall->takeName(CI); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1277 | NewCall->setAttributes(CI->getAttributes()); |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 1278 | NewCall->setCallingConv(CI->getCallingConv()); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1279 | |
| 1280 | // Finally, remove the old call, replacing any uses with the new one. |
Chris Lattner | 00549fc | 2009-10-14 05:49:21 +0000 | [diff] [blame] | 1281 | if (!CI->use_empty()) |
| 1282 | CI->replaceAllUsesWith(NewCall); |
Devang Patel | 3b122bc | 2009-10-13 17:02:04 +0000 | [diff] [blame] | 1283 | |
Chris Lattner | c603463 | 2010-04-01 06:31:43 +0000 | [diff] [blame] | 1284 | // Copy debug location attached to CI. |
| 1285 | if (!CI->getDebugLoc().isUnknown()) |
| 1286 | NewCall->setDebugLoc(CI->getDebugLoc()); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1287 | CI->eraseFromParent(); |
| 1288 | } |
| 1289 | } |
| 1290 | |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1291 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1292 | void CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1293 | const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); |
John McCall | c0bf462 | 2010-02-23 00:48:20 +0000 | [diff] [blame] | 1294 | const llvm::FunctionType *Ty = getTypes().GetFunctionType(GD); |
Fariborz Jahanian | 4819ac4 | 2010-03-04 01:02:03 +0000 | [diff] [blame] | 1295 | getMangleContext().mangleInitDiscriminator(); |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 1296 | // Get or create the prototype for the function. |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1297 | llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1298 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1299 | // Strip off a bitcast if we got one back. |
| 1300 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { |
| 1301 | assert(CE->getOpcode() == llvm::Instruction::BitCast); |
| 1302 | Entry = CE->getOperand(0); |
| 1303 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1304 | |
| 1305 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1306 | if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1307 | llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1308 | |
Daniel Dunbar | 4274581 | 2009-03-09 23:53:08 +0000 | [diff] [blame] | 1309 | // If the types mismatch then we have to rewrite the definition. |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1310 | assert(OldFn->isDeclaration() && |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1311 | "Shouldn't replace non-declaration"); |
Chris Lattner | 3480950 | 2009-03-21 08:53:37 +0000 | [diff] [blame] | 1312 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 1313 | // F is the Function* for the one with the wrong type, we must make a new |
| 1314 | // Function* and update everything that used F (a declaration) with the new |
| 1315 | // Function* (which will be a definition). |
| 1316 | // |
| 1317 | // This happens if there is a prototype for a function |
| 1318 | // (e.g. "int f()") and then a definition of a different type |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1319 | // (e.g. "int f(int x)"). Move the old function aside so that it |
| 1320 | // doesn't interfere with GetAddrOfFunction. |
| 1321 | OldFn->setName(llvm::StringRef()); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1322 | llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1323 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1324 | // If this is an implementation of a function without a prototype, try to |
| 1325 | // replace any existing uses of the function (which may be calls) with uses |
| 1326 | // of the new function |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 1327 | if (D->getType()->isFunctionNoProtoType()) { |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1328 | ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 1329 | OldFn->removeDeadConstantUsers(); |
| 1330 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1331 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 1332 | // 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] | 1333 | if (!Entry->use_empty()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1334 | llvm::Constant *NewPtrForOldDecl = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1335 | llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1336 | Entry->replaceAllUsesWith(NewPtrForOldDecl); |
| 1337 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1338 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 1339 | // Ok, delete the old function now, which is dead. |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 1340 | OldFn->eraseFromParent(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1341 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1342 | Entry = NewFn; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1343 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1344 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1345 | llvm::Function *Fn = cast<llvm::Function>(Entry); |
John McCall | 8b24233 | 2010-05-25 04:30:21 +0000 | [diff] [blame] | 1346 | setFunctionLinkage(D, Fn); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1347 | |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1348 | CodeGenFunction(*this).GenerateCode(D, Fn); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 1349 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1350 | SetFunctionDefinitionAttributes(D, Fn); |
| 1351 | SetLLVMFunctionAttributesForDefinition(D, Fn); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1352 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1353 | if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1354 | AddGlobalCtor(Fn, CA->getPriority()); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1355 | if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1356 | AddGlobalDtor(Fn, DA->getPriority()); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1357 | } |
| 1358 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1359 | void CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { |
| 1360 | const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1361 | const AliasAttr *AA = D->getAttr<AliasAttr>(); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1362 | assert(AA && "Not an alias?"); |
| 1363 | |
Anders Carlsson | 9a20d55 | 2010-06-22 16:16:50 +0000 | [diff] [blame] | 1364 | llvm::StringRef MangledName = getMangledName(GD); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1365 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1366 | // If there is a definition in the module, then it wins over the alias. |
| 1367 | // This is dubious, but allow it to be safe. Just ignore the alias. |
| 1368 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); |
| 1369 | if (Entry && !Entry->isDeclaration()) |
| 1370 | return; |
| 1371 | |
| 1372 | const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1373 | |
| 1374 | // Create a reference to the named value. This ensures that it is emitted |
| 1375 | // if a deferred decl. |
| 1376 | llvm::Constant *Aliasee; |
| 1377 | if (isa<llvm::FunctionType>(DeclTy)) |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1378 | Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl()); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1379 | else |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1380 | Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1381 | llvm::PointerType::getUnqual(DeclTy), 0); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1382 | |
| 1383 | // Create the new alias itself, but don't set a name yet. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1384 | llvm::GlobalValue *GA = |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1385 | new llvm::GlobalAlias(Aliasee->getType(), |
| 1386 | llvm::Function::ExternalLinkage, |
| 1387 | "", Aliasee, &getModule()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1388 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1389 | if (Entry) { |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1390 | assert(Entry->isDeclaration()); |
| 1391 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1392 | // If there is a declaration in the module, then we had an extern followed |
| 1393 | // by the alias, as in: |
| 1394 | // extern int test6(); |
| 1395 | // ... |
| 1396 | // int test6() __attribute__((alias("test7"))); |
| 1397 | // |
| 1398 | // Remove it and replace uses of it with the alias. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1399 | GA->takeName(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1400 | |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1401 | Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1402 | Entry->getType())); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1403 | Entry->eraseFromParent(); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1404 | } else { |
Anders Carlsson | 9a20d55 | 2010-06-22 16:16:50 +0000 | [diff] [blame] | 1405 | GA->setName(MangledName); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1406 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1407 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1408 | // Set attributes which are particular to an alias; this is a |
| 1409 | // specialization of the attributes which may be set on a global |
| 1410 | // variable/function. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1411 | if (D->hasAttr<DLLExportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1412 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 1413 | // The dllexport attribute is ignored for undefined symbols. |
Argyrios Kyrtzidis | 06a54a3 | 2010-07-07 11:31:19 +0000 | [diff] [blame] | 1414 | if (FD->hasBody()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1415 | GA->setLinkage(llvm::Function::DLLExportLinkage); |
| 1416 | } else { |
| 1417 | GA->setLinkage(llvm::Function::DLLExportLinkage); |
| 1418 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1419 | } else if (D->hasAttr<WeakAttr>() || |
Rafael Espindola | 11e8ce7 | 2010-02-23 22:00:30 +0000 | [diff] [blame] | 1420 | D->hasAttr<WeakRefAttr>() || |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1421 | D->hasAttr<WeakImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1422 | GA->setLinkage(llvm::Function::WeakAnyLinkage); |
| 1423 | } |
| 1424 | |
| 1425 | SetCommonAttributes(D, GA); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1426 | } |
| 1427 | |
Chris Lattner | b808c95 | 2009-03-22 21:56:56 +0000 | [diff] [blame] | 1428 | /// getBuiltinLibFunction - Given a builtin id for a function like |
| 1429 | /// "__builtin_fabsf", return a Function* for "fabsf". |
Daniel Dunbar | 34771b5 | 2009-09-14 04:33:21 +0000 | [diff] [blame] | 1430 | llvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, |
| 1431 | unsigned BuiltinID) { |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1432 | assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1433 | Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1434 | "isn't a lib fn"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1435 | |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1436 | // Get the name, skip over the __builtin_ prefix (if necessary). |
| 1437 | const char *Name = Context.BuiltinInfo.GetName(BuiltinID); |
| 1438 | if (Context.BuiltinInfo.isLibFunction(BuiltinID)) |
| 1439 | Name += 10; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1440 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1441 | const llvm::FunctionType *Ty = |
Eli Friedman | 386ca78 | 2009-12-09 03:05:59 +0000 | [diff] [blame] | 1442 | cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1443 | |
Daniel Dunbar | 34771b5 | 2009-09-14 04:33:21 +0000 | [diff] [blame] | 1444 | return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD)); |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1445 | } |
| 1446 | |
Chris Lattner | 7acda7c | 2007-12-18 00:25:38 +0000 | [diff] [blame] | 1447 | llvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, |
| 1448 | unsigned NumTys) { |
| 1449 | return llvm::Intrinsic::getDeclaration(&getModule(), |
| 1450 | (llvm::Intrinsic::ID)IID, Tys, NumTys); |
| 1451 | } |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 1452 | |
Mon P Wang | 3ecd785 | 2010-04-04 03:10:52 +0000 | [diff] [blame] | 1453 | |
| 1454 | llvm::Function *CodeGenModule::getMemCpyFn(const llvm::Type *DestType, |
| 1455 | const llvm::Type *SrcType, |
| 1456 | const llvm::Type *SizeType) { |
| 1457 | const llvm::Type *ArgTypes[3] = {DestType, SrcType, SizeType }; |
| 1458 | return getIntrinsic(llvm::Intrinsic::memcpy, ArgTypes, 3); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1459 | } |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1460 | |
Mon P Wang | 3ecd785 | 2010-04-04 03:10:52 +0000 | [diff] [blame] | 1461 | llvm::Function *CodeGenModule::getMemMoveFn(const llvm::Type *DestType, |
| 1462 | const llvm::Type *SrcType, |
| 1463 | const llvm::Type *SizeType) { |
| 1464 | const llvm::Type *ArgTypes[3] = {DestType, SrcType, SizeType }; |
| 1465 | return getIntrinsic(llvm::Intrinsic::memmove, ArgTypes, 3); |
Eli Friedman | 0c99509 | 2008-05-26 12:59:39 +0000 | [diff] [blame] | 1466 | } |
| 1467 | |
Mon P Wang | 3ecd785 | 2010-04-04 03:10:52 +0000 | [diff] [blame] | 1468 | llvm::Function *CodeGenModule::getMemSetFn(const llvm::Type *DestType, |
| 1469 | const llvm::Type *SizeType) { |
| 1470 | const llvm::Type *ArgTypes[2] = { DestType, SizeType }; |
| 1471 | return getIntrinsic(llvm::Intrinsic::memset, ArgTypes, 2); |
Lauro Ramos Venancio | 41ef30e | 2008-02-19 22:01:01 +0000 | [diff] [blame] | 1472 | } |
Chris Lattner | 7acda7c | 2007-12-18 00:25:38 +0000 | [diff] [blame] | 1473 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1474 | static llvm::StringMapEntry<llvm::Constant*> & |
| 1475 | GetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, |
| 1476 | const StringLiteral *Literal, |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1477 | bool TargetIsLSB, |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1478 | bool &IsUTF16, |
| 1479 | unsigned &StringLength) { |
Daniel Dunbar | df4eee9 | 2009-09-22 03:27:52 +0000 | [diff] [blame] | 1480 | unsigned NumBytes = Literal->getByteLength(); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1481 | |
Daniel Dunbar | f015b03 | 2009-09-22 10:03:52 +0000 | [diff] [blame] | 1482 | // Check for simple case. |
| 1483 | if (!Literal->containsNonAsciiOrNull()) { |
| 1484 | StringLength = NumBytes; |
| 1485 | return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), |
| 1486 | StringLength)); |
| 1487 | } |
| 1488 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1489 | // Otherwise, convert the UTF8 literals into a byte string. |
| 1490 | llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); |
| 1491 | const UTF8 *FromPtr = (UTF8 *)Literal->getStrData(); |
| 1492 | UTF16 *ToPtr = &ToBuf[0]; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1493 | |
| 1494 | ConversionResult Result = ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1495 | &ToPtr, ToPtr + NumBytes, |
| 1496 | strictConversion); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1497 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1498 | // Check for conversion failure. |
| 1499 | if (Result != conversionOK) { |
| 1500 | // FIXME: Have Sema::CheckObjCString() validate the UTF-8 string and remove |
| 1501 | // this duplicate code. |
| 1502 | assert(Result == sourceIllegal && "UTF-8 to UTF-16 conversion failed"); |
Daniel Dunbar | f015b03 | 2009-09-22 10:03:52 +0000 | [diff] [blame] | 1503 | StringLength = NumBytes; |
| 1504 | return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), |
| 1505 | StringLength)); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1506 | } |
| 1507 | |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1508 | // ConvertUTF8toUTF16 returns the length in ToPtr. |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1509 | StringLength = ToPtr - &ToBuf[0]; |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1510 | |
| 1511 | // Render the UTF-16 string into a byte array and convert to the target byte |
| 1512 | // order. |
| 1513 | // |
| 1514 | // FIXME: This isn't something we should need to do here. |
| 1515 | llvm::SmallString<128> AsBytes; |
| 1516 | AsBytes.reserve(StringLength * 2); |
| 1517 | for (unsigned i = 0; i != StringLength; ++i) { |
| 1518 | unsigned short Val = ToBuf[i]; |
| 1519 | if (TargetIsLSB) { |
| 1520 | AsBytes.push_back(Val & 0xFF); |
| 1521 | AsBytes.push_back(Val >> 8); |
| 1522 | } else { |
| 1523 | AsBytes.push_back(Val >> 8); |
| 1524 | AsBytes.push_back(Val & 0xFF); |
| 1525 | } |
| 1526 | } |
Daniel Dunbar | 434da48 | 2009-08-03 21:47:08 +0000 | [diff] [blame] | 1527 | // Append one extra null character, the second is automatically added by our |
| 1528 | // caller. |
| 1529 | AsBytes.push_back(0); |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1530 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1531 | IsUTF16 = true; |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1532 | return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1533 | } |
| 1534 | |
| 1535 | llvm::Constant * |
| 1536 | CodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { |
| 1537 | unsigned StringLength = 0; |
| 1538 | bool isUTF16 = false; |
| 1539 | llvm::StringMapEntry<llvm::Constant*> &Entry = |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1540 | GetConstantCFStringEntry(CFConstantStringMap, Literal, |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 1541 | getTargetData().isLittleEndian(), |
| 1542 | isUTF16, StringLength); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1543 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1544 | if (llvm::Constant *C = Entry.getValue()) |
| 1545 | return C; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1546 | |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1547 | llvm::Constant *Zero = |
| 1548 | llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1549 | llvm::Constant *Zeros[] = { Zero, Zero }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1550 | |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1551 | // If we don't already have it, get __CFConstantStringClassReference. |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1552 | if (!CFConstantStringClassRef) { |
| 1553 | const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1554 | Ty = llvm::ArrayType::get(Ty, 0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1555 | llvm::Constant *GV = CreateRuntimeVariable(Ty, |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1556 | "__CFConstantStringClassReference"); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1557 | // Decay array -> ptr |
| 1558 | CFConstantStringClassRef = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1559 | llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1560 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1561 | |
Anders Carlsson | e3daa76 | 2008-11-15 18:54:24 +0000 | [diff] [blame] | 1562 | QualType CFTy = getContext().getCFConstantStringType(); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1563 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1564 | const llvm::StructType *STy = |
Anders Carlsson | e3daa76 | 2008-11-15 18:54:24 +0000 | [diff] [blame] | 1565 | cast<llvm::StructType>(getTypes().ConvertType(CFTy)); |
| 1566 | |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1567 | std::vector<llvm::Constant*> Fields(4); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 1568 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1569 | // Class pointer. |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1570 | Fields[0] = CFConstantStringClassRef; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1571 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1572 | // Flags. |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 1573 | const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1574 | Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1575 | llvm::ConstantInt::get(Ty, 0x07C8); |
| 1576 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1577 | // String pointer. |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1578 | llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1579 | |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1580 | llvm::GlobalValue::LinkageTypes Linkage; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1581 | bool isConstant; |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1582 | if (isUTF16) { |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1583 | // FIXME: why do utf strings get "_" labels instead of "L" labels? |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1584 | Linkage = llvm::GlobalValue::InternalLinkage; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1585 | // Note: -fwritable-strings doesn't make unicode CFStrings writable, but |
| 1586 | // does make plain ascii ones writable. |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1587 | isConstant = true; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1588 | } else { |
| 1589 | Linkage = llvm::GlobalValue::PrivateLinkage; |
| 1590 | isConstant = !Features.WritableStrings; |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1591 | } |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1592 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1593 | llvm::GlobalVariable *GV = |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 1594 | new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, |
| 1595 | ".str"); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1596 | if (isUTF16) { |
Ken Dyck | 4da244c | 2010-01-26 18:46:23 +0000 | [diff] [blame] | 1597 | CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); |
| 1598 | GV->setAlignment(Align.getQuantity()); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 1599 | } |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1600 | Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); |
| 1601 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1602 | // String length. |
| 1603 | Ty = getTypes().ConvertType(getContext().LongTy); |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 1604 | Fields[3] = llvm::ConstantInt::get(Ty, StringLength); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1605 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1606 | // The struct. |
Owen Anderson | 08e2524 | 2009-07-27 22:29:56 +0000 | [diff] [blame] | 1607 | C = llvm::ConstantStruct::get(STy, Fields); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1608 | GV = new llvm::GlobalVariable(getModule(), C->getType(), true, |
| 1609 | llvm::GlobalVariable::PrivateLinkage, C, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1610 | "_unnamed_cfstring_"); |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1611 | if (const char *Sect = getContext().Target.getCFStringSection()) |
| 1612 | GV->setSection(Sect); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 1613 | Entry.setValue(GV); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1614 | |
Anders Carlsson | 0c67829 | 2007-11-01 00:41:52 +0000 | [diff] [blame] | 1615 | return GV; |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 1616 | } |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1617 | |
Fariborz Jahanian | 33e982b | 2010-04-22 20:26:39 +0000 | [diff] [blame] | 1618 | llvm::Constant * |
| 1619 | CodeGenModule::GetAddrOfConstantNSString(const StringLiteral *Literal) { |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 1620 | unsigned StringLength = 0; |
| 1621 | bool isUTF16 = false; |
| 1622 | llvm::StringMapEntry<llvm::Constant*> &Entry = |
| 1623 | GetConstantCFStringEntry(CFConstantStringMap, Literal, |
| 1624 | getTargetData().isLittleEndian(), |
| 1625 | isUTF16, StringLength); |
| 1626 | |
| 1627 | if (llvm::Constant *C = Entry.getValue()) |
| 1628 | return C; |
| 1629 | |
| 1630 | llvm::Constant *Zero = |
| 1631 | llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); |
| 1632 | llvm::Constant *Zeros[] = { Zero, Zero }; |
| 1633 | |
Fariborz Jahanian | ec951e0 | 2010-04-23 22:33:39 +0000 | [diff] [blame] | 1634 | // If we don't already have it, get _NSConstantStringClassReference. |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 1635 | if (!NSConstantStringClassRef) { |
| 1636 | const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); |
| 1637 | Ty = llvm::ArrayType::get(Ty, 0); |
Fariborz Jahanian | ec951e0 | 2010-04-23 22:33:39 +0000 | [diff] [blame] | 1638 | llvm::Constant *GV = CreateRuntimeVariable(Ty, |
| 1639 | Features.ObjCNonFragileABI ? |
| 1640 | "OBJC_CLASS_$_NSConstantString" : |
| 1641 | "_NSConstantStringClassReference"); |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 1642 | // Decay array -> ptr |
| 1643 | NSConstantStringClassRef = |
| 1644 | llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); |
| 1645 | } |
| 1646 | |
| 1647 | QualType NSTy = getContext().getNSConstantStringType(); |
| 1648 | |
| 1649 | const llvm::StructType *STy = |
| 1650 | cast<llvm::StructType>(getTypes().ConvertType(NSTy)); |
| 1651 | |
| 1652 | std::vector<llvm::Constant*> Fields(3); |
| 1653 | |
| 1654 | // Class pointer. |
| 1655 | Fields[0] = NSConstantStringClassRef; |
| 1656 | |
| 1657 | // String pointer. |
| 1658 | llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); |
| 1659 | |
| 1660 | llvm::GlobalValue::LinkageTypes Linkage; |
| 1661 | bool isConstant; |
| 1662 | if (isUTF16) { |
| 1663 | // FIXME: why do utf strings get "_" labels instead of "L" labels? |
| 1664 | Linkage = llvm::GlobalValue::InternalLinkage; |
| 1665 | // Note: -fwritable-strings doesn't make unicode NSStrings writable, but |
| 1666 | // does make plain ascii ones writable. |
| 1667 | isConstant = true; |
| 1668 | } else { |
| 1669 | Linkage = llvm::GlobalValue::PrivateLinkage; |
| 1670 | isConstant = !Features.WritableStrings; |
| 1671 | } |
| 1672 | |
| 1673 | llvm::GlobalVariable *GV = |
| 1674 | new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, |
| 1675 | ".str"); |
| 1676 | if (isUTF16) { |
| 1677 | CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); |
| 1678 | GV->setAlignment(Align.getQuantity()); |
| 1679 | } |
| 1680 | Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); |
| 1681 | |
| 1682 | // String length. |
| 1683 | const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); |
| 1684 | Fields[2] = llvm::ConstantInt::get(Ty, StringLength); |
| 1685 | |
| 1686 | // The struct. |
| 1687 | C = llvm::ConstantStruct::get(STy, Fields); |
| 1688 | GV = new llvm::GlobalVariable(getModule(), C->getType(), true, |
| 1689 | llvm::GlobalVariable::PrivateLinkage, C, |
| 1690 | "_unnamed_nsstring_"); |
| 1691 | // FIXME. Fix section. |
Fariborz Jahanian | ec951e0 | 2010-04-23 22:33:39 +0000 | [diff] [blame] | 1692 | if (const char *Sect = |
| 1693 | Features.ObjCNonFragileABI |
| 1694 | ? getContext().Target.getNSStringNonFragileABISection() |
| 1695 | : getContext().Target.getNSStringSection()) |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 1696 | GV->setSection(Sect); |
| 1697 | Entry.setValue(GV); |
| 1698 | |
| 1699 | return GV; |
Fariborz Jahanian | 33e982b | 2010-04-22 20:26:39 +0000 | [diff] [blame] | 1700 | } |
| 1701 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1702 | /// GetStringForStringLiteral - Return the appropriate bytes for a |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1703 | /// string literal, properly padded to match the literal type. |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1704 | std::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1705 | const char *StrData = E->getStrData(); |
| 1706 | unsigned Len = E->getByteLength(); |
| 1707 | |
| 1708 | const ConstantArrayType *CAT = |
| 1709 | getContext().getAsConstantArrayType(E->getType()); |
| 1710 | assert(CAT && "String isn't pointer or array!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1711 | |
Chris Lattner | dbb1ecc | 2009-02-26 23:01:51 +0000 | [diff] [blame] | 1712 | // Resize the string to the right size. |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1713 | std::string Str(StrData, StrData+Len); |
| 1714 | uint64_t RealLen = CAT->getSize().getZExtValue(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1715 | |
Chris Lattner | dbb1ecc | 2009-02-26 23:01:51 +0000 | [diff] [blame] | 1716 | if (E->isWide()) |
| 1717 | RealLen *= getContext().Target.getWCharWidth()/8; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1718 | |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1719 | Str.resize(RealLen, '\0'); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1720 | |
Daniel Dunbar | 1e04976 | 2008-08-10 20:25:57 +0000 | [diff] [blame] | 1721 | return Str; |
| 1722 | } |
| 1723 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1724 | /// GetAddrOfConstantStringFromLiteral - Return a pointer to a |
| 1725 | /// constant array for the given string literal. |
| 1726 | llvm::Constant * |
| 1727 | CodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { |
| 1728 | // FIXME: This can be more efficient. |
Eli Friedman | 7eb79c1 | 2009-11-16 05:55:46 +0000 | [diff] [blame] | 1729 | // FIXME: We shouldn't need to bitcast the constant in the wide string case. |
| 1730 | llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); |
| 1731 | if (S->isWide()) { |
| 1732 | llvm::Type *DestTy = |
| 1733 | llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); |
| 1734 | C = llvm::ConstantExpr::getBitCast(C, DestTy); |
| 1735 | } |
| 1736 | return C; |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1737 | } |
| 1738 | |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1739 | /// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant |
| 1740 | /// array for the given ObjCEncodeExpr node. |
| 1741 | llvm::Constant * |
| 1742 | CodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { |
| 1743 | std::string Str; |
| 1744 | getContext().getObjCEncodingForType(E->getEncodedType(), Str); |
Eli Friedman | a210f35 | 2009-03-07 20:17:55 +0000 | [diff] [blame] | 1745 | |
| 1746 | return GetAddrOfConstantCString(Str); |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1747 | } |
| 1748 | |
| 1749 | |
Chris Lattner | a7ad98f | 2008-02-11 00:02:17 +0000 | [diff] [blame] | 1750 | /// GenerateWritableString -- Creates storage for a string literal. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1751 | static llvm::Constant *GenerateStringLiteral(const std::string &str, |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1752 | bool constant, |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1753 | CodeGenModule &CGM, |
| 1754 | const char *GlobalName) { |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1755 | // Create Constant for this string literal. Don't add a '\0'. |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1756 | llvm::Constant *C = |
| 1757 | llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1758 | |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1759 | // Create a global variable for this string |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1760 | return new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1761 | llvm::GlobalValue::PrivateLinkage, |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 1762 | C, GlobalName); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1763 | } |
| 1764 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1765 | /// GetAddrOfConstantString - Returns a pointer to a character array |
| 1766 | /// containing the literal. This contents are exactly that of the |
| 1767 | /// given string, i.e. it will not be null terminated automatically; |
| 1768 | /// see GetAddrOfConstantCString. Note that whether the result is |
| 1769 | /// actually a pointer to an LLVM constant depends on |
| 1770 | /// Feature.WriteableStrings. |
| 1771 | /// |
| 1772 | /// The result has pointer to array type. |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1773 | llvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, |
| 1774 | const char *GlobalName) { |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1775 | bool IsConstant = !Features.WritableStrings; |
| 1776 | |
| 1777 | // Get the default prefix if a name wasn't specified. |
| 1778 | if (!GlobalName) |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1779 | GlobalName = ".str"; |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 1780 | |
| 1781 | // Don't share any string literals if strings aren't constant. |
| 1782 | if (!IsConstant) |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1783 | return GenerateStringLiteral(str, false, *this, GlobalName); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1784 | |
| 1785 | llvm::StringMapEntry<llvm::Constant *> &Entry = |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 1786 | ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1787 | |
| 1788 | if (Entry.getValue()) |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1789 | return Entry.getValue(); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1790 | |
| 1791 | // Create a global variable for this. |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1792 | llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 1793 | Entry.setValue(C); |
| 1794 | return C; |
| 1795 | } |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1796 | |
| 1797 | /// GetAddrOfConstantCString - Returns a pointer to a character |
| 1798 | /// array containing the literal and a terminating '\-' |
| 1799 | /// character. The result has pointer to array type. |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 1800 | llvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, |
| 1801 | const char *GlobalName){ |
Chris Lattner | c9f29c6 | 2008-12-09 19:10:54 +0000 | [diff] [blame] | 1802 | return GetAddrOfConstantString(str + '\0', GlobalName); |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 1803 | } |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1804 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1805 | /// EmitObjCPropertyImplementations - Emit information for synthesized |
| 1806 | /// properties for an implementation. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1807 | void CodeGenModule::EmitObjCPropertyImplementations(const |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1808 | ObjCImplementationDecl *D) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1809 | for (ObjCImplementationDecl::propimpl_iterator |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1810 | i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1811 | ObjCPropertyImplDecl *PID = *i; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1812 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1813 | // Dynamic is just for type-checking. |
| 1814 | if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { |
| 1815 | ObjCPropertyDecl *PD = PID->getPropertyDecl(); |
| 1816 | |
| 1817 | // Determine which methods need to be implemented, some may have |
| 1818 | // been overridden. Note that ::isSynthesized is not the method |
| 1819 | // we want, that just indicates if the decl came from a |
| 1820 | // property. What we want to know is if the method is defined in |
| 1821 | // this implementation. |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1822 | if (!D->getInstanceMethod(PD->getGetterName())) |
Fariborz Jahanian | fef30b5 | 2008-12-09 20:23:04 +0000 | [diff] [blame] | 1823 | CodeGenFunction(*this).GenerateObjCGetter( |
| 1824 | const_cast<ObjCImplementationDecl *>(D), PID); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1825 | if (!PD->isReadOnly() && |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1826 | !D->getInstanceMethod(PD->getSetterName())) |
Fariborz Jahanian | fef30b5 | 2008-12-09 20:23:04 +0000 | [diff] [blame] | 1827 | CodeGenFunction(*this).GenerateObjCSetter( |
| 1828 | const_cast<ObjCImplementationDecl *>(D), PID); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1829 | } |
| 1830 | } |
| 1831 | } |
| 1832 | |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 1833 | /// EmitObjCIvarInitializations - Emit information for ivar initialization |
| 1834 | /// for an implementation. |
| 1835 | void CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { |
| 1836 | if (!Features.NeXTRuntime || D->getNumIvarInitializers() == 0) |
| 1837 | return; |
| 1838 | DeclContext* DC = const_cast<DeclContext*>(dyn_cast<DeclContext>(D)); |
| 1839 | assert(DC && "EmitObjCIvarInitializations - null DeclContext"); |
| 1840 | IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); |
| 1841 | Selector cxxSelector = getContext().Selectors.getSelector(0, &II); |
| 1842 | ObjCMethodDecl *DTORMethod = ObjCMethodDecl::Create(getContext(), |
| 1843 | D->getLocation(), |
| 1844 | D->getLocation(), cxxSelector, |
| 1845 | getContext().VoidTy, 0, |
Fariborz Jahanian | 3fe1041 | 2010-07-22 18:24:20 +0000 | [diff] [blame] | 1846 | DC, true, false, true, false, |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 1847 | ObjCMethodDecl::Required); |
| 1848 | D->addInstanceMethod(DTORMethod); |
| 1849 | CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); |
| 1850 | |
| 1851 | II = &getContext().Idents.get(".cxx_construct"); |
| 1852 | cxxSelector = getContext().Selectors.getSelector(0, &II); |
| 1853 | // The constructor returns 'self'. |
| 1854 | ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), |
| 1855 | D->getLocation(), |
| 1856 | D->getLocation(), cxxSelector, |
| 1857 | getContext().getObjCIdType(), 0, |
Fariborz Jahanian | 3fe1041 | 2010-07-22 18:24:20 +0000 | [diff] [blame] | 1858 | DC, true, false, true, false, |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 1859 | ObjCMethodDecl::Required); |
| 1860 | D->addInstanceMethod(CTORMethod); |
| 1861 | CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); |
| 1862 | |
| 1863 | |
| 1864 | } |
| 1865 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1866 | /// EmitNamespace - Emit all declarations in a namespace. |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 1867 | void CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1868 | for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 1869 | I != E; ++I) |
| 1870 | EmitTopLevelDecl(*I); |
| 1871 | } |
| 1872 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1873 | // EmitLinkageSpec - Emit all declarations in a linkage spec. |
| 1874 | void CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { |
Eli Friedman | f976be8 | 2009-08-01 20:48:04 +0000 | [diff] [blame] | 1875 | if (LSD->getLanguage() != LinkageSpecDecl::lang_c && |
| 1876 | LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1877 | ErrorUnsupported(LSD, "linkage spec"); |
| 1878 | return; |
| 1879 | } |
| 1880 | |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1881 | for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1882 | I != E; ++I) |
| 1883 | EmitTopLevelDecl(*I); |
| 1884 | } |
| 1885 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1886 | /// EmitTopLevelDecl - Emit code for a single top level declaration. |
| 1887 | void CodeGenModule::EmitTopLevelDecl(Decl *D) { |
| 1888 | // If an error has occurred, stop code generation, but continue |
| 1889 | // parsing and semantic analysis (to ensure all warnings and errors |
| 1890 | // are emitted). |
| 1891 | if (Diags.hasErrorOccurred()) |
| 1892 | return; |
| 1893 | |
Douglas Gregor | 16e8be2 | 2009-06-29 17:30:29 +0000 | [diff] [blame] | 1894 | // Ignore dependent declarations. |
| 1895 | if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) |
| 1896 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1897 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1898 | switch (D->getKind()) { |
Anders Carlsson | 293361a | 2009-08-25 13:14:46 +0000 | [diff] [blame] | 1899 | case Decl::CXXConversion: |
Anders Carlsson | 2b77ba8 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 1900 | case Decl::CXXMethod: |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1901 | case Decl::Function: |
Douglas Gregor | 16e8be2 | 2009-06-29 17:30:29 +0000 | [diff] [blame] | 1902 | // Skip function templates |
| 1903 | if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) |
| 1904 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1905 | |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 1906 | EmitGlobal(cast<FunctionDecl>(D)); |
| 1907 | break; |
| 1908 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1909 | case Decl::Var: |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 1910 | EmitGlobal(cast<VarDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1911 | break; |
| 1912 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1913 | // C++ Decls |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1914 | case Decl::Namespace: |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 1915 | EmitNamespace(cast<NamespaceDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1916 | break; |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 1917 | // No code generation needed. |
John McCall | 9d0c661 | 2009-11-17 09:33:40 +0000 | [diff] [blame] | 1918 | case Decl::UsingShadow: |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 1919 | case Decl::Using: |
Douglas Gregor | dd9967a | 2009-09-02 23:49:23 +0000 | [diff] [blame] | 1920 | case Decl::UsingDirective: |
Douglas Gregor | 127102b | 2009-06-29 20:59:39 +0000 | [diff] [blame] | 1921 | case Decl::ClassTemplate: |
| 1922 | case Decl::FunctionTemplate: |
Anders Carlsson | 018837b | 2009-09-23 19:19:16 +0000 | [diff] [blame] | 1923 | case Decl::NamespaceAlias: |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 1924 | break; |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1925 | case Decl::CXXConstructor: |
Anders Carlsson | 1fe598c | 2009-11-24 05:16:24 +0000 | [diff] [blame] | 1926 | // Skip function templates |
| 1927 | if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) |
| 1928 | return; |
| 1929 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1930 | EmitCXXConstructors(cast<CXXConstructorDecl>(D)); |
| 1931 | break; |
Anders Carlsson | 27ae536 | 2009-04-17 01:58:57 +0000 | [diff] [blame] | 1932 | case Decl::CXXDestructor: |
| 1933 | EmitCXXDestructors(cast<CXXDestructorDecl>(D)); |
| 1934 | break; |
Anders Carlsson | 36674d2 | 2009-06-11 21:22:55 +0000 | [diff] [blame] | 1935 | |
| 1936 | case Decl::StaticAssert: |
| 1937 | // Nothing to do. |
| 1938 | break; |
| 1939 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 1940 | // Objective-C Decls |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1941 | |
Fariborz Jahanian | 38e24c7 | 2009-03-18 22:33:24 +0000 | [diff] [blame] | 1942 | // Forward declarations, no (immediate) code generation. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1943 | case Decl::ObjCClass: |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1944 | case Decl::ObjCForwardProtocol: |
Fariborz Jahanian | b31cb7f | 2009-03-21 18:06:45 +0000 | [diff] [blame] | 1945 | case Decl::ObjCCategory: |
Chris Lattner | 285d0db | 2009-04-01 02:36:43 +0000 | [diff] [blame] | 1946 | case Decl::ObjCInterface: |
Chris Lattner | 285d0db | 2009-04-01 02:36:43 +0000 | [diff] [blame] | 1947 | break; |
| 1948 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1949 | case Decl::ObjCProtocol: |
Fariborz Jahanian | b31cb7f | 2009-03-21 18:06:45 +0000 | [diff] [blame] | 1950 | Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1951 | break; |
| 1952 | |
| 1953 | case Decl::ObjCCategoryImpl: |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1954 | // Categories have properties but don't support synthesize so we |
| 1955 | // can ignore them here. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1956 | Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); |
| 1957 | break; |
| 1958 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1959 | case Decl::ObjCImplementation: { |
| 1960 | ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); |
| 1961 | EmitObjCPropertyImplementations(OMD); |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 1962 | EmitObjCIvarInitializations(OMD); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1963 | Runtime->GenerateClass(OMD); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1964 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1965 | } |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1966 | case Decl::ObjCMethod: { |
| 1967 | ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); |
| 1968 | // If this is not a prototype, emit the body. |
Argyrios Kyrtzidis | 6fb0aee | 2009-06-30 02:35:26 +0000 | [diff] [blame] | 1969 | if (OMD->getBody()) |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1970 | CodeGenFunction(*this).GenerateObjCMethod(OMD); |
| 1971 | break; |
| 1972 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1973 | case Decl::ObjCCompatibleAlias: |
Fariborz Jahanian | 305c658 | 2009-01-08 01:10:55 +0000 | [diff] [blame] | 1974 | // compatibility-alias is a directive and has no code gen. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1975 | break; |
| 1976 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 1977 | case Decl::LinkageSpec: |
| 1978 | EmitLinkageSpec(cast<LinkageSpecDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1979 | break; |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1980 | |
| 1981 | case Decl::FileScopeAsm: { |
| 1982 | FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); |
Benjamin Kramer | 8d04258 | 2009-12-11 13:33:18 +0000 | [diff] [blame] | 1983 | llvm::StringRef AsmString = AD->getAsmString()->getString(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1984 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1985 | const std::string &S = getModule().getModuleInlineAsm(); |
| 1986 | if (S.empty()) |
| 1987 | getModule().setModuleInlineAsm(AsmString); |
| 1988 | else |
Benjamin Kramer | 8d04258 | 2009-12-11 13:33:18 +0000 | [diff] [blame] | 1989 | getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1990 | break; |
| 1991 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1992 | |
| 1993 | default: |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 1994 | // Make sure we handled everything we should, every other kind is a |
| 1995 | // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind |
| 1996 | // function. Need to recode Decl::Kind to do that easily. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 1997 | assert(isa<TypeDecl>(D) && "Unsupported decl kind"); |
| 1998 | } |
| 1999 | } |
John McCall | 744016d | 2010-07-06 23:57:41 +0000 | [diff] [blame] | 2000 | |
| 2001 | /// Turns the given pointer into a constant. |
| 2002 | static llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, |
| 2003 | const void *Ptr) { |
| 2004 | uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); |
| 2005 | const llvm::Type *i64 = llvm::Type::getInt64Ty(Context); |
| 2006 | return llvm::ConstantInt::get(i64, PtrInt); |
| 2007 | } |
| 2008 | |
| 2009 | static void EmitGlobalDeclMetadata(CodeGenModule &CGM, |
| 2010 | llvm::NamedMDNode *&GlobalMetadata, |
| 2011 | GlobalDecl D, |
| 2012 | llvm::GlobalValue *Addr) { |
| 2013 | if (!GlobalMetadata) |
| 2014 | GlobalMetadata = |
| 2015 | CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); |
| 2016 | |
| 2017 | // TODO: should we report variant information for ctors/dtors? |
| 2018 | llvm::Value *Ops[] = { |
| 2019 | Addr, |
| 2020 | GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) |
| 2021 | }; |
| 2022 | GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops, 2)); |
| 2023 | } |
| 2024 | |
| 2025 | /// Emits metadata nodes associating all the global values in the |
| 2026 | /// current module with the Decls they came from. This is useful for |
| 2027 | /// projects using IR gen as a subroutine. |
| 2028 | /// |
| 2029 | /// Since there's currently no way to associate an MDNode directly |
| 2030 | /// with an llvm::GlobalValue, we create a global named metadata |
| 2031 | /// with the name 'clang.global.decl.ptrs'. |
| 2032 | void CodeGenModule::EmitDeclMetadata() { |
| 2033 | llvm::NamedMDNode *GlobalMetadata = 0; |
| 2034 | |
| 2035 | // StaticLocalDeclMap |
| 2036 | for (llvm::DenseMap<GlobalDecl,llvm::StringRef>::iterator |
| 2037 | I = MangledDeclNames.begin(), E = MangledDeclNames.end(); |
| 2038 | I != E; ++I) { |
| 2039 | llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); |
| 2040 | EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); |
| 2041 | } |
| 2042 | } |
| 2043 | |
| 2044 | /// Emits metadata nodes for all the local variables in the current |
| 2045 | /// function. |
| 2046 | void CodeGenFunction::EmitDeclMetadata() { |
| 2047 | if (LocalDeclMap.empty()) return; |
| 2048 | |
| 2049 | llvm::LLVMContext &Context = getLLVMContext(); |
| 2050 | |
| 2051 | // Find the unique metadata ID for this name. |
| 2052 | unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); |
| 2053 | |
| 2054 | llvm::NamedMDNode *GlobalMetadata = 0; |
| 2055 | |
| 2056 | for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator |
| 2057 | I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { |
| 2058 | const Decl *D = I->first; |
| 2059 | llvm::Value *Addr = I->second; |
| 2060 | |
| 2061 | if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { |
| 2062 | llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); |
| 2063 | Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, &DAddr, 1)); |
| 2064 | } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { |
| 2065 | GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); |
| 2066 | EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); |
| 2067 | } |
| 2068 | } |
| 2069 | } |
Daniel Dunbar | 673431a | 2010-07-16 00:00:15 +0000 | [diff] [blame] | 2070 | |
| 2071 | ///@name Custom Runtime Function Interfaces |
| 2072 | ///@{ |
| 2073 | // |
| 2074 | // FIXME: These can be eliminated once we can have clients just get the required |
| 2075 | // AST nodes from the builtin tables. |
| 2076 | |
| 2077 | llvm::Constant *CodeGenModule::getBlockObjectDispose() { |
| 2078 | if (BlockObjectDispose) |
| 2079 | return BlockObjectDispose; |
| 2080 | |
Daniel Dunbar | 754b9fb | 2010-07-16 00:00:19 +0000 | [diff] [blame] | 2081 | // If we saw an explicit decl, use that. |
| 2082 | if (BlockObjectDisposeDecl) { |
| 2083 | return BlockObjectDispose = GetAddrOfFunction( |
| 2084 | BlockObjectDisposeDecl, |
| 2085 | getTypes().GetFunctionType(BlockObjectDisposeDecl)); |
| 2086 | } |
| 2087 | |
| 2088 | // Otherwise construct the function by hand. |
Daniel Dunbar | 673431a | 2010-07-16 00:00:15 +0000 | [diff] [blame] | 2089 | const llvm::FunctionType *FTy; |
| 2090 | std::vector<const llvm::Type*> ArgTys; |
| 2091 | const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); |
| 2092 | ArgTys.push_back(PtrToInt8Ty); |
| 2093 | ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); |
| 2094 | FTy = llvm::FunctionType::get(ResultType, ArgTys, false); |
| 2095 | return BlockObjectDispose = |
| 2096 | CreateRuntimeFunction(FTy, "_Block_object_dispose"); |
| 2097 | } |
| 2098 | |
| 2099 | llvm::Constant *CodeGenModule::getBlockObjectAssign() { |
| 2100 | if (BlockObjectAssign) |
| 2101 | return BlockObjectAssign; |
| 2102 | |
Daniel Dunbar | 754b9fb | 2010-07-16 00:00:19 +0000 | [diff] [blame] | 2103 | // If we saw an explicit decl, use that. |
| 2104 | if (BlockObjectAssignDecl) { |
| 2105 | return BlockObjectAssign = GetAddrOfFunction( |
| 2106 | BlockObjectAssignDecl, |
| 2107 | getTypes().GetFunctionType(BlockObjectAssignDecl)); |
| 2108 | } |
| 2109 | |
| 2110 | // Otherwise construct the function by hand. |
Daniel Dunbar | 673431a | 2010-07-16 00:00:15 +0000 | [diff] [blame] | 2111 | const llvm::FunctionType *FTy; |
| 2112 | std::vector<const llvm::Type*> ArgTys; |
| 2113 | const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); |
| 2114 | ArgTys.push_back(PtrToInt8Ty); |
| 2115 | ArgTys.push_back(PtrToInt8Ty); |
| 2116 | ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); |
| 2117 | FTy = llvm::FunctionType::get(ResultType, ArgTys, false); |
| 2118 | return BlockObjectAssign = |
| 2119 | CreateRuntimeFunction(FTy, "_Block_object_assign"); |
| 2120 | } |
| 2121 | |
| 2122 | llvm::Constant *CodeGenModule::getNSConcreteGlobalBlock() { |
| 2123 | if (NSConcreteGlobalBlock) |
| 2124 | return NSConcreteGlobalBlock; |
Daniel Dunbar | 754b9fb | 2010-07-16 00:00:19 +0000 | [diff] [blame] | 2125 | |
| 2126 | // If we saw an explicit decl, use that. |
| 2127 | if (NSConcreteGlobalBlockDecl) { |
| 2128 | return NSConcreteGlobalBlock = GetAddrOfGlobalVar( |
| 2129 | NSConcreteGlobalBlockDecl, |
| 2130 | getTypes().ConvertType(NSConcreteGlobalBlockDecl->getType())); |
| 2131 | } |
| 2132 | |
| 2133 | // Otherwise construct the variable by hand. |
Daniel Dunbar | 673431a | 2010-07-16 00:00:15 +0000 | [diff] [blame] | 2134 | return NSConcreteGlobalBlock = CreateRuntimeVariable( |
| 2135 | PtrToInt8Ty, "_NSConcreteGlobalBlock"); |
| 2136 | } |
| 2137 | |
| 2138 | llvm::Constant *CodeGenModule::getNSConcreteStackBlock() { |
| 2139 | if (NSConcreteStackBlock) |
| 2140 | return NSConcreteStackBlock; |
Daniel Dunbar | 754b9fb | 2010-07-16 00:00:19 +0000 | [diff] [blame] | 2141 | |
| 2142 | // If we saw an explicit decl, use that. |
| 2143 | if (NSConcreteStackBlockDecl) { |
| 2144 | return NSConcreteStackBlock = GetAddrOfGlobalVar( |
| 2145 | NSConcreteStackBlockDecl, |
| 2146 | getTypes().ConvertType(NSConcreteStackBlockDecl->getType())); |
| 2147 | } |
| 2148 | |
| 2149 | // Otherwise construct the variable by hand. |
Daniel Dunbar | 673431a | 2010-07-16 00:00:15 +0000 | [diff] [blame] | 2150 | return NSConcreteStackBlock = CreateRuntimeVariable( |
| 2151 | PtrToInt8Ty, "_NSConcreteStackBlock"); |
| 2152 | } |
| 2153 | |
| 2154 | ///@} |