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" |
Peter Collingbourne | 6c0aa5f | 2011-10-06 18:29:37 +0000 | [diff] [blame] | 15 | #include "CGCUDARuntime.h" |
John McCall | 4c40d98 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 16 | #include "CGCXXABI.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 17 | #include "CGCall.h" |
| 18 | #include "CGDebugInfo.h" |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 19 | #include "CGObjCRuntime.h" |
Peter Collingbourne | 8c25fc5 | 2011-09-19 21:14:35 +0000 | [diff] [blame] | 20 | #include "CGOpenCLRuntime.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 21 | #include "CodeGenFunction.h" |
| 22 | #include "CodeGenTBAA.h" |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 23 | #include "TargetInfo.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 24 | #include "clang/AST/ASTContext.h" |
Ken Dyck | 687cc4a | 2010-01-26 13:48:07 +0000 | [diff] [blame] | 25 | #include "clang/AST/CharUnits.h" |
Chris Lattner | 21ef7ae | 2008-11-04 16:51:42 +0000 | [diff] [blame] | 26 | #include "clang/AST/DeclCXX.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 27 | #include "clang/AST/DeclObjC.h" |
Douglas Gregor | af89689 | 2010-06-21 18:41:26 +0000 | [diff] [blame] | 28 | #include "clang/AST/DeclTemplate.h" |
Peter Collingbourne | 1411047 | 2011-01-13 18:57:25 +0000 | [diff] [blame] | 29 | #include "clang/AST/Mangle.h" |
Anders Carlsson | 1a5e0d7 | 2009-11-30 23:41:22 +0000 | [diff] [blame] | 30 | #include "clang/AST/RecordLayout.h" |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 31 | #include "clang/AST/RecursiveASTVisitor.h" |
Rafael Espindola | bcf6b98 | 2011-12-19 14:41:01 +0000 | [diff] [blame] | 32 | #include "clang/Basic/Builtins.h" |
Jordan Rose | 3f6f51e | 2013-02-08 22:30:41 +0000 | [diff] [blame] | 33 | #include "clang/Basic/CharInfo.h" |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 34 | #include "clang/Basic/Diagnostic.h" |
Douglas Gregor | b6cbe51 | 2013-01-14 17:21:00 +0000 | [diff] [blame] | 35 | #include "clang/Basic/Module.h" |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 36 | #include "clang/Basic/SourceManager.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 37 | #include "clang/Basic/TargetInfo.h" |
Rafael Espindola | 9686f12 | 2013-10-16 19:28:50 +0000 | [diff] [blame] | 38 | #include "clang/Basic/Version.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 39 | #include "clang/Frontend/CodeGenOptions.h" |
Rafael Espindola | d205498 | 2013-10-22 19:26:13 +0000 | [diff] [blame] | 40 | #include "clang/Sema/SemaDiagnostic.h" |
Sebastian Redl | 19b1a6e | 2012-02-25 20:51:20 +0000 | [diff] [blame] | 41 | #include "llvm/ADT/APSInt.h" |
John McCall | 6374c33 | 2010-03-06 00:35:14 +0000 | [diff] [blame] | 42 | #include "llvm/ADT/Triple.h" |
Chandler Carruth | 3b844ba | 2013-01-02 11:45:17 +0000 | [diff] [blame] | 43 | #include "llvm/IR/CallingConv.h" |
| 44 | #include "llvm/IR/DataLayout.h" |
| 45 | #include "llvm/IR/Intrinsics.h" |
| 46 | #include "llvm/IR/LLVMContext.h" |
| 47 | #include "llvm/IR/Module.h" |
Gabor Greif | 6ba728d | 2010-04-10 02:56:12 +0000 | [diff] [blame] | 48 | #include "llvm/Support/CallSite.h" |
Dmitri Gribenko | cb5620c | 2013-01-30 12:06:08 +0000 | [diff] [blame] | 49 | #include "llvm/Support/ConvertUTF.h" |
Chris Lattner | 78f7ece | 2009-11-07 09:22:46 +0000 | [diff] [blame] | 50 | #include "llvm/Support/ErrorHandling.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 51 | #include "llvm/Target/Mangler.h" |
Dmitri Gribenko | cb5620c | 2013-01-30 12:06:08 +0000 | [diff] [blame] | 52 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 53 | using namespace clang; |
| 54 | using namespace CodeGen; |
| 55 | |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 56 | static const char AnnotationSection[] = "llvm.metadata"; |
| 57 | |
John McCall | f16aa10 | 2010-08-22 21:01:12 +0000 | [diff] [blame] | 58 | static CGCXXABI &createCXXABI(CodeGenModule &CGM) { |
John McCall | 64aa4b3 | 2013-04-16 22:48:15 +0000 | [diff] [blame] | 59 | switch (CGM.getTarget().getCXXABI().getKind()) { |
Tim Northover | c264e16 | 2013-01-31 12:13:10 +0000 | [diff] [blame] | 60 | case TargetCXXABI::GenericAArch64: |
John McCall | 96fcde0 | 2013-01-25 23:36:14 +0000 | [diff] [blame] | 61 | case TargetCXXABI::GenericARM: |
| 62 | case TargetCXXABI::iOS: |
| 63 | case TargetCXXABI::GenericItanium: |
| 64 | return *CreateItaniumCXXABI(CGM); |
| 65 | case TargetCXXABI::Microsoft: |
| 66 | return *CreateMicrosoftCXXABI(CGM); |
John McCall | f16aa10 | 2010-08-22 21:01:12 +0000 | [diff] [blame] | 67 | } |
| 68 | |
| 69 | llvm_unreachable("invalid C++ ABI kind"); |
John McCall | f16aa10 | 2010-08-22 21:01:12 +0000 | [diff] [blame] | 70 | } |
| 71 | |
Chandler Carruth | 2811ccf | 2009-11-12 17:24:48 +0000 | [diff] [blame] | 72 | CodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, |
John McCall | 3abae09 | 2013-04-16 22:48:20 +0000 | [diff] [blame] | 73 | llvm::Module &M, const llvm::DataLayout &TD, |
David Blaikie | d6471f7 | 2011-09-25 23:23:43 +0000 | [diff] [blame] | 74 | DiagnosticsEngine &diags) |
Alexey Samsonov | 6a4c5dc | 2013-08-12 11:48:05 +0000 | [diff] [blame] | 75 | : Context(C), LangOpts(C.getLangOpts()), CodeGenOpts(CGO), TheModule(M), |
| 76 | Diags(diags), TheDataLayout(TD), Target(C.getTargetInfo()), |
| 77 | ABI(createCXXABI(*this)), VMContext(M.getContext()), TBAA(0), |
| 78 | TheTargetCodeGenInfo(0), Types(*this), VTables(*this), ObjCRuntime(0), |
| 79 | OpenCLRuntime(0), CUDARuntime(0), DebugInfo(0), ARCData(0), |
| 80 | NoObjCARCExceptionsMetadata(0), RRData(0), CFConstantStringClassRef(0), |
| 81 | ConstantStringClassRef(0), NSConstantStringType(0), |
| 82 | NSConcreteGlobalBlock(0), NSConcreteStackBlock(0), BlockObjectAssign(0), |
| 83 | BlockObjectDispose(0), BlockDescriptorType(0), GenericBlockLiteralType(0), |
| 84 | LifetimeStartFn(0), LifetimeEndFn(0), |
| 85 | SanitizerBlacklist( |
| 86 | llvm::SpecialCaseList::createOrDie(CGO.SanitizerBlacklistFile)), |
| 87 | SanOpts(SanitizerBlacklist->isIn(M) ? SanitizerOptions::Disabled |
| 88 | : LangOpts.Sanitize) { |
Will Dietz | 4f45bc0 | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 89 | |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 90 | // Initialize the type cache. |
| 91 | llvm::LLVMContext &LLVMContext = M.getContext(); |
| 92 | VoidTy = llvm::Type::getVoidTy(LLVMContext); |
| 93 | Int8Ty = llvm::Type::getInt8Ty(LLVMContext); |
| 94 | Int16Ty = llvm::Type::getInt16Ty(LLVMContext); |
| 95 | Int32Ty = llvm::Type::getInt32Ty(LLVMContext); |
| 96 | Int64Ty = llvm::Type::getInt64Ty(LLVMContext); |
| 97 | FloatTy = llvm::Type::getFloatTy(LLVMContext); |
| 98 | DoubleTy = llvm::Type::getDoubleTy(LLVMContext); |
| 99 | PointerWidthInBits = C.getTargetInfo().getPointerWidth(0); |
| 100 | PointerAlignInBytes = |
| 101 | C.toCharUnitsFromBits(C.getTargetInfo().getPointerAlign(0)).getQuantity(); |
| 102 | IntTy = llvm::IntegerType::get(LLVMContext, C.getTargetInfo().getIntWidth()); |
| 103 | IntPtrTy = llvm::IntegerType::get(LLVMContext, PointerWidthInBits); |
| 104 | Int8PtrTy = Int8Ty->getPointerTo(0); |
| 105 | Int8PtrPtrTy = Int8PtrTy->getPointerTo(0); |
| 106 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 107 | RuntimeCC = getTargetCodeGenInfo().getABIInfo().getRuntimeCC(); |
| 108 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 109 | if (LangOpts.ObjC1) |
Peter Collingbourne | 8c25fc5 | 2011-09-19 21:14:35 +0000 | [diff] [blame] | 110 | createObjCRuntime(); |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 111 | if (LangOpts.OpenCL) |
Peter Collingbourne | 8c25fc5 | 2011-09-19 21:14:35 +0000 | [diff] [blame] | 112 | createOpenCLRuntime(); |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 113 | if (LangOpts.CUDA) |
Peter Collingbourne | 6c0aa5f | 2011-10-06 18:29:37 +0000 | [diff] [blame] | 114 | createCUDARuntime(); |
Sanjiv Gupta | e8b9f5b | 2008-05-08 08:54:20 +0000 | [diff] [blame] | 115 | |
Kostya Serebryany | c9fe605 | 2012-04-24 06:57:01 +0000 | [diff] [blame] | 116 | // Enable TBAA unless it's suppressed. ThreadSanitizer needs TBAA even at O0. |
Will Dietz | 4f45bc0 | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 117 | if (SanOpts.Thread || |
Kostya Serebryany | c9fe605 | 2012-04-24 06:57:01 +0000 | [diff] [blame] | 118 | (!CodeGenOpts.RelaxedAliasing && CodeGenOpts.OptimizationLevel > 0)) |
| 119 | TBAA = new CodeGenTBAA(Context, VMContext, CodeGenOpts, getLangOpts(), |
Dan Gohman | 0b5c4fc | 2010-10-15 20:23:12 +0000 | [diff] [blame] | 120 | ABI.getMangleContext()); |
Dan Gohman | 3d5aff5 | 2010-10-14 23:06:10 +0000 | [diff] [blame] | 121 | |
Nick Lewycky | e8ba8d7 | 2011-04-21 23:44:07 +0000 | [diff] [blame] | 122 | // If debug info or coverage generation is enabled, create the CGDebugInfo |
| 123 | // object. |
Douglas Gregor | 4cdad31 | 2012-10-23 20:05:01 +0000 | [diff] [blame] | 124 | if (CodeGenOpts.getDebugInfo() != CodeGenOptions::NoDebugInfo || |
Alexey Samsonov | 3a70cd6 | 2012-04-27 07:24:20 +0000 | [diff] [blame] | 125 | CodeGenOpts.EmitGcovArcs || |
Nick Lewycky | e8ba8d7 | 2011-04-21 23:44:07 +0000 | [diff] [blame] | 126 | CodeGenOpts.EmitGcovNotes) |
| 127 | DebugInfo = new CGDebugInfo(*this); |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 128 | |
| 129 | Block.GlobalUniqueCount = 0; |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 130 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 131 | if (C.getLangOpts().ObjCAutoRefCount) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 132 | ARCData = new ARCEntrypoints(); |
| 133 | RRData = new RREntrypoints(); |
Chris Lattner | 2b94fe3 | 2008-03-01 08:45:05 +0000 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | CodeGenModule::~CodeGenModule() { |
Peter Collingbourne | e926523 | 2011-07-27 20:29:46 +0000 | [diff] [blame] | 137 | delete ObjCRuntime; |
Peter Collingbourne | 8c25fc5 | 2011-09-19 21:14:35 +0000 | [diff] [blame] | 138 | delete OpenCLRuntime; |
Peter Collingbourne | 6c0aa5f | 2011-10-06 18:29:37 +0000 | [diff] [blame] | 139 | delete CUDARuntime; |
Ted Kremenek | 0628b72 | 2011-10-08 05:28:26 +0000 | [diff] [blame] | 140 | delete TheTargetCodeGenInfo; |
John McCall | f16aa10 | 2010-08-22 21:01:12 +0000 | [diff] [blame] | 141 | delete &ABI; |
Dan Gohman | 4376c85 | 2010-10-15 18:04:46 +0000 | [diff] [blame] | 142 | delete TBAA; |
Ted Kremenek | 815c78f | 2008-08-05 18:50:11 +0000 | [diff] [blame] | 143 | delete DebugInfo; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 144 | delete ARCData; |
| 145 | delete RRData; |
Ted Kremenek | 815c78f | 2008-08-05 18:50:11 +0000 | [diff] [blame] | 146 | } |
| 147 | |
David Chisnall | 0d13f6f | 2010-01-23 02:40:42 +0000 | [diff] [blame] | 148 | void CodeGenModule::createObjCRuntime() { |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 149 | // This is just isGNUFamily(), but we want to force implementors of |
| 150 | // new ABIs to decide how best to do this. |
| 151 | switch (LangOpts.ObjCRuntime.getKind()) { |
David Chisnall | 11d3f4c | 2012-07-03 20:49:52 +0000 | [diff] [blame] | 152 | case ObjCRuntime::GNUstep: |
| 153 | case ObjCRuntime::GCC: |
John McCall | f7226fb | 2012-07-12 02:07:58 +0000 | [diff] [blame] | 154 | case ObjCRuntime::ObjFW: |
Peter Collingbourne | e926523 | 2011-07-27 20:29:46 +0000 | [diff] [blame] | 155 | ObjCRuntime = CreateGNUObjCRuntime(*this); |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 156 | return; |
| 157 | |
| 158 | case ObjCRuntime::FragileMacOSX: |
| 159 | case ObjCRuntime::MacOSX: |
| 160 | case ObjCRuntime::iOS: |
Peter Collingbourne | e926523 | 2011-07-27 20:29:46 +0000 | [diff] [blame] | 161 | ObjCRuntime = CreateMacObjCRuntime(*this); |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 162 | return; |
| 163 | } |
| 164 | llvm_unreachable("bad runtime kind"); |
David Chisnall | 0d13f6f | 2010-01-23 02:40:42 +0000 | [diff] [blame] | 165 | } |
| 166 | |
Peter Collingbourne | 8c25fc5 | 2011-09-19 21:14:35 +0000 | [diff] [blame] | 167 | void CodeGenModule::createOpenCLRuntime() { |
| 168 | OpenCLRuntime = new CGOpenCLRuntime(*this); |
| 169 | } |
| 170 | |
Peter Collingbourne | 6c0aa5f | 2011-10-06 18:29:37 +0000 | [diff] [blame] | 171 | void CodeGenModule::createCUDARuntime() { |
| 172 | CUDARuntime = CreateNVCUDARuntime(*this); |
| 173 | } |
| 174 | |
Rafael Espindola | 61a0a75 | 2013-11-05 21:37:29 +0000 | [diff] [blame] | 175 | void CodeGenModule::applyReplacements() { |
| 176 | for (ReplacementsTy::iterator I = Replacements.begin(), |
| 177 | E = Replacements.end(); |
| 178 | I != E; ++I) { |
| 179 | StringRef MangledName = I->first(); |
| 180 | llvm::Constant *Replacement = I->second; |
| 181 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); |
| 182 | if (!Entry) |
| 183 | continue; |
Rafael Espindola | 081c215 | 2013-11-12 04:53:19 +0000 | [diff] [blame] | 184 | llvm::Function *OldF = cast<llvm::Function>(Entry); |
| 185 | llvm::Function *NewF = dyn_cast<llvm::Function>(Replacement); |
| 186 | if (!NewF) { |
| 187 | llvm::ConstantExpr *CE = cast<llvm::ConstantExpr>(Replacement); |
| 188 | assert(CE->getOpcode() == llvm::Instruction::BitCast || |
| 189 | CE->getOpcode() == llvm::Instruction::GetElementPtr); |
| 190 | NewF = dyn_cast<llvm::Function>(CE->getOperand(0)); |
| 191 | } |
| 192 | |
| 193 | // Replace old with new, but keep the old order. |
| 194 | OldF->replaceAllUsesWith(Replacement); |
| 195 | if (NewF) { |
| 196 | NewF->removeFromParent(); |
| 197 | OldF->getParent()->getFunctionList().insertAfter(OldF, NewF); |
| 198 | } |
| 199 | OldF->eraseFromParent(); |
Rafael Espindola | 61a0a75 | 2013-11-05 21:37:29 +0000 | [diff] [blame] | 200 | } |
| 201 | } |
| 202 | |
Rafael Espindola | d205498 | 2013-10-22 19:26:13 +0000 | [diff] [blame] | 203 | void CodeGenModule::checkAliases() { |
| 204 | bool Error = false; |
| 205 | for (std::vector<GlobalDecl>::iterator I = Aliases.begin(), |
| 206 | E = Aliases.end(); I != E; ++I) { |
| 207 | const GlobalDecl &GD = *I; |
| 208 | const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); |
| 209 | const AliasAttr *AA = D->getAttr<AliasAttr>(); |
| 210 | StringRef MangledName = getMangledName(GD); |
| 211 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); |
| 212 | llvm::GlobalAlias *Alias = cast<llvm::GlobalAlias>(Entry); |
| 213 | llvm::GlobalValue *GV = Alias->getAliasedGlobal(); |
| 214 | if (GV->isDeclaration()) { |
| 215 | Error = true; |
| 216 | getDiags().Report(AA->getLocation(), diag::err_alias_to_undefined); |
| 217 | } else if (!Alias->resolveAliasedGlobal(/*stopOnWeak*/ false)) { |
| 218 | Error = true; |
| 219 | getDiags().Report(AA->getLocation(), diag::err_cyclic_alias); |
| 220 | } |
| 221 | } |
| 222 | if (!Error) |
| 223 | return; |
| 224 | |
| 225 | for (std::vector<GlobalDecl>::iterator I = Aliases.begin(), |
| 226 | E = Aliases.end(); I != E; ++I) { |
| 227 | const GlobalDecl &GD = *I; |
| 228 | StringRef MangledName = getMangledName(GD); |
| 229 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); |
| 230 | llvm::GlobalAlias *Alias = cast<llvm::GlobalAlias>(Entry); |
| 231 | Alias->replaceAllUsesWith(llvm::UndefValue::get(Alias->getType())); |
| 232 | Alias->eraseFromParent(); |
| 233 | } |
| 234 | } |
| 235 | |
Ted Kremenek | 815c78f | 2008-08-05 18:50:11 +0000 | [diff] [blame] | 236 | void CodeGenModule::Release() { |
Chris Lattner | 82227ff | 2009-03-22 21:21:57 +0000 | [diff] [blame] | 237 | EmitDeferred(); |
Rafael Espindola | 61a0a75 | 2013-11-05 21:37:29 +0000 | [diff] [blame] | 238 | applyReplacements(); |
Rafael Espindola | d205498 | 2013-10-22 19:26:13 +0000 | [diff] [blame] | 239 | checkAliases(); |
Eli Friedman | 6c6bda3 | 2010-01-08 00:50:11 +0000 | [diff] [blame] | 240 | EmitCXXGlobalInitFunc(); |
Daniel Dunbar | efb0fa9 | 2010-03-20 04:15:41 +0000 | [diff] [blame] | 241 | EmitCXXGlobalDtorFunc(); |
Richard Smith | b80a16e | 2013-04-19 16:42:07 +0000 | [diff] [blame] | 242 | EmitCXXThreadLocalInitFunc(); |
Peter Collingbourne | e926523 | 2011-07-27 20:29:46 +0000 | [diff] [blame] | 243 | if (ObjCRuntime) |
| 244 | if (llvm::Function *ObjCInitFunction = ObjCRuntime->ModuleInitFunction()) |
Daniel Dunbar | 208ff5e | 2008-08-11 18:12:00 +0000 | [diff] [blame] | 245 | AddGlobalCtor(ObjCInitFunction); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 246 | EmitCtorList(GlobalCtors, "llvm.global_ctors"); |
| 247 | EmitCtorList(GlobalDtors, "llvm.global_dtors"); |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 248 | EmitGlobalAnnotations(); |
Richard Smith | 0024937 | 2013-04-06 05:00:46 +0000 | [diff] [blame] | 249 | EmitStaticExternCAliases(); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 250 | EmitLLVMUsed(); |
Douglas Gregor | f43b721 | 2013-01-16 01:23:41 +0000 | [diff] [blame] | 251 | |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 252 | if (CodeGenOpts.Autolink && |
| 253 | (Context.getLangOpts().Modules || !LinkerOptionsMetadata.empty())) { |
Douglas Gregor | f43b721 | 2013-01-16 01:23:41 +0000 | [diff] [blame] | 254 | EmitModuleLinkOptions(); |
| 255 | } |
Manman Ren | fc0f91c | 2013-06-19 01:46:49 +0000 | [diff] [blame] | 256 | if (CodeGenOpts.DwarfVersion) |
| 257 | // We actually want the latest version when there are conflicts. |
| 258 | // We can change from Warning to Latest if such mode is supported. |
| 259 | getModule().addModuleFlag(llvm::Module::Warning, "Dwarf Version", |
| 260 | CodeGenOpts.DwarfVersion); |
Douglas Gregor | 5d75ea7 | 2013-01-14 18:28:43 +0000 | [diff] [blame] | 261 | |
John McCall | b259383 | 2010-09-16 06:16:50 +0000 | [diff] [blame] | 262 | SimplifyPersonality(); |
| 263 | |
John McCall | 744016d | 2010-07-06 23:57:41 +0000 | [diff] [blame] | 264 | if (getCodeGenOpts().EmitDeclMetadata) |
| 265 | EmitDeclMetadata(); |
Nick Lewycky | 5ea4f44 | 2011-05-04 20:46:58 +0000 | [diff] [blame] | 266 | |
| 267 | if (getCodeGenOpts().EmitGcovArcs || getCodeGenOpts().EmitGcovNotes) |
Nick Lewycky | 3dc0541 | 2011-05-05 00:08:20 +0000 | [diff] [blame] | 268 | EmitCoverageFile(); |
Devang Patel | f391dbe | 2011-08-16 20:58:22 +0000 | [diff] [blame] | 269 | |
| 270 | if (DebugInfo) |
| 271 | DebugInfo->finalize(); |
Rafael Espindola | 9686f12 | 2013-10-16 19:28:50 +0000 | [diff] [blame] | 272 | |
| 273 | EmitVersionIdentMetadata(); |
Daniel Dunbar | f1968f2 | 2008-10-01 00:49:24 +0000 | [diff] [blame] | 274 | } |
| 275 | |
Devang Patel | e80d567 | 2011-03-23 16:29:39 +0000 | [diff] [blame] | 276 | void CodeGenModule::UpdateCompletedType(const TagDecl *TD) { |
| 277 | // Make sure that this type is translated. |
| 278 | Types.UpdateCompletedType(TD); |
Devang Patel | e80d567 | 2011-03-23 16:29:39 +0000 | [diff] [blame] | 279 | } |
| 280 | |
Dan Gohman | 3d5aff5 | 2010-10-14 23:06:10 +0000 | [diff] [blame] | 281 | llvm::MDNode *CodeGenModule::getTBAAInfo(QualType QTy) { |
| 282 | if (!TBAA) |
| 283 | return 0; |
| 284 | return TBAA->getTBAAInfo(QTy); |
| 285 | } |
| 286 | |
Kostya Serebryany | 8cb4a07 | 2012-03-26 17:03:51 +0000 | [diff] [blame] | 287 | llvm::MDNode *CodeGenModule::getTBAAInfoForVTablePtr() { |
| 288 | if (!TBAA) |
| 289 | return 0; |
| 290 | return TBAA->getTBAAInfoForVTablePtr(); |
| 291 | } |
| 292 | |
Dan Gohman | b22c7dc | 2012-09-28 21:58:29 +0000 | [diff] [blame] | 293 | llvm::MDNode *CodeGenModule::getTBAAStructInfo(QualType QTy) { |
| 294 | if (!TBAA) |
| 295 | return 0; |
| 296 | return TBAA->getTBAAStructInfo(QTy); |
| 297 | } |
| 298 | |
Manman Ren | b37a73d | 2013-04-04 21:53:22 +0000 | [diff] [blame] | 299 | llvm::MDNode *CodeGenModule::getTBAAStructTypeInfo(QualType QTy) { |
| 300 | if (!TBAA) |
| 301 | return 0; |
| 302 | return TBAA->getTBAAStructTypeInfo(QTy); |
| 303 | } |
| 304 | |
| 305 | llvm::MDNode *CodeGenModule::getTBAAStructTagInfo(QualType BaseTy, |
| 306 | llvm::MDNode *AccessN, |
| 307 | uint64_t O) { |
| 308 | if (!TBAA) |
| 309 | return 0; |
| 310 | return TBAA->getTBAAStructTagInfo(BaseTy, AccessN, O); |
| 311 | } |
| 312 | |
Manman Ren | feba9f2 | 2013-10-08 00:08:49 +0000 | [diff] [blame] | 313 | /// Decorate the instruction with a TBAA tag. For both scalar TBAA |
| 314 | /// and struct-path aware TBAA, the tag has the same format: |
| 315 | /// base type, access type and offset. |
Manman Ren | ca83518 | 2013-04-11 23:02:56 +0000 | [diff] [blame] | 316 | /// When ConvertTypeToTag is true, we create a tag based on the scalar type. |
Dan Gohman | 3d5aff5 | 2010-10-14 23:06:10 +0000 | [diff] [blame] | 317 | void CodeGenModule::DecorateInstruction(llvm::Instruction *Inst, |
Manman Ren | ca83518 | 2013-04-11 23:02:56 +0000 | [diff] [blame] | 318 | llvm::MDNode *TBAAInfo, |
| 319 | bool ConvertTypeToTag) { |
Manman Ren | feba9f2 | 2013-10-08 00:08:49 +0000 | [diff] [blame] | 320 | if (ConvertTypeToTag && TBAA) |
Manman Ren | ca83518 | 2013-04-11 23:02:56 +0000 | [diff] [blame] | 321 | Inst->setMetadata(llvm::LLVMContext::MD_tbaa, |
| 322 | TBAA->getTBAAScalarTagInfo(TBAAInfo)); |
| 323 | else |
| 324 | Inst->setMetadata(llvm::LLVMContext::MD_tbaa, TBAAInfo); |
Dan Gohman | 3d5aff5 | 2010-10-14 23:06:10 +0000 | [diff] [blame] | 325 | } |
| 326 | |
Chandler Carruth | 0f30a12 | 2012-03-30 19:44:53 +0000 | [diff] [blame] | 327 | void CodeGenModule::Error(SourceLocation loc, StringRef error) { |
| 328 | unsigned diagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, error); |
John McCall | 3209669 | 2011-03-18 02:56:14 +0000 | [diff] [blame] | 329 | getDiags().Report(Context.getFullLoc(loc), diagID); |
| 330 | } |
| 331 | |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 332 | /// ErrorUnsupported - Print out an error that codegen doesn't support the |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 333 | /// specified stmt yet. |
David Blaikie | 0a1c862 | 2013-08-19 21:02:26 +0000 | [diff] [blame] | 334 | void CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type) { |
David Blaikie | d6471f7 | 2011-09-25 23:23:43 +0000 | [diff] [blame] | 335 | unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, |
Daniel Dunbar | 56b8001 | 2009-02-06 19:18:03 +0000 | [diff] [blame] | 336 | "cannot compile this %0 yet"); |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 337 | std::string Msg = Type; |
Chris Lattner | 0a14eee | 2008-11-18 07:04:44 +0000 | [diff] [blame] | 338 | getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) |
| 339 | << Msg << S->getSourceRange(); |
Chris Lattner | 2c8569d | 2007-12-02 07:19:18 +0000 | [diff] [blame] | 340 | } |
Chris Lattner | 58c3f9e | 2007-12-02 06:27:33 +0000 | [diff] [blame] | 341 | |
Daniel Dunbar | 488e993 | 2008-08-16 00:56:44 +0000 | [diff] [blame] | 342 | /// ErrorUnsupported - Print out an error that codegen doesn't support the |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 343 | /// specified decl yet. |
David Blaikie | 0a1c862 | 2013-08-19 21:02:26 +0000 | [diff] [blame] | 344 | void CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type) { |
David Blaikie | d6471f7 | 2011-09-25 23:23:43 +0000 | [diff] [blame] | 345 | unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, |
Daniel Dunbar | 56b8001 | 2009-02-06 19:18:03 +0000 | [diff] [blame] | 346 | "cannot compile this %0 yet"); |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 347 | std::string Msg = Type; |
Chris Lattner | 0a14eee | 2008-11-18 07:04:44 +0000 | [diff] [blame] | 348 | getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 349 | } |
| 350 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 351 | llvm::ConstantInt *CodeGenModule::getSize(CharUnits size) { |
| 352 | return llvm::ConstantInt::get(SizeTy, size.getQuantity()); |
| 353 | } |
| 354 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 355 | void CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, |
Anders Carlsson | 0ffeaad | 2011-01-29 19:39:23 +0000 | [diff] [blame] | 356 | const NamedDecl *D) const { |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 357 | // Internal definitions always have default visibility. |
Chris Lattner | df102fc | 2009-04-14 05:27:13 +0000 | [diff] [blame] | 358 | if (GV->hasLocalLinkage()) { |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 359 | GV->setVisibility(llvm::GlobalValue::DefaultVisibility); |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 360 | return; |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 361 | } |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 362 | |
John McCall | af14603 | 2010-10-30 11:50:40 +0000 | [diff] [blame] | 363 | // Set visibility for definitions. |
Rafael Espindola | 2beda12 | 2013-02-27 02:15:29 +0000 | [diff] [blame] | 364 | LinkageInfo LV = D->getLinkageAndVisibility(); |
Rafael Espindola | f127eb8 | 2013-02-27 02:56:45 +0000 | [diff] [blame] | 365 | if (LV.isVisibilityExplicit() || !GV->hasAvailableExternallyLinkage()) |
| 366 | GV->setVisibility(GetLLVMVisibility(LV.getVisibility())); |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 367 | } |
| 368 | |
Hans Wennborg | de981f3 | 2012-06-28 08:01:44 +0000 | [diff] [blame] | 369 | static llvm::GlobalVariable::ThreadLocalMode GetLLVMTLSModel(StringRef S) { |
| 370 | return llvm::StringSwitch<llvm::GlobalVariable::ThreadLocalMode>(S) |
| 371 | .Case("global-dynamic", llvm::GlobalVariable::GeneralDynamicTLSModel) |
| 372 | .Case("local-dynamic", llvm::GlobalVariable::LocalDynamicTLSModel) |
| 373 | .Case("initial-exec", llvm::GlobalVariable::InitialExecTLSModel) |
| 374 | .Case("local-exec", llvm::GlobalVariable::LocalExecTLSModel); |
| 375 | } |
| 376 | |
| 377 | static llvm::GlobalVariable::ThreadLocalMode GetLLVMTLSModel( |
| 378 | CodeGenOptions::TLSModel M) { |
| 379 | switch (M) { |
| 380 | case CodeGenOptions::GeneralDynamicTLSModel: |
| 381 | return llvm::GlobalVariable::GeneralDynamicTLSModel; |
| 382 | case CodeGenOptions::LocalDynamicTLSModel: |
| 383 | return llvm::GlobalVariable::LocalDynamicTLSModel; |
| 384 | case CodeGenOptions::InitialExecTLSModel: |
| 385 | return llvm::GlobalVariable::InitialExecTLSModel; |
| 386 | case CodeGenOptions::LocalExecTLSModel: |
| 387 | return llvm::GlobalVariable::LocalExecTLSModel; |
| 388 | } |
| 389 | llvm_unreachable("Invalid TLS model!"); |
| 390 | } |
| 391 | |
| 392 | void CodeGenModule::setTLSMode(llvm::GlobalVariable *GV, |
| 393 | const VarDecl &D) const { |
Richard Smith | 38afbc7 | 2013-04-13 02:43:54 +0000 | [diff] [blame] | 394 | assert(D.getTLSKind() && "setting TLS mode on non-TLS var!"); |
Hans Wennborg | de981f3 | 2012-06-28 08:01:44 +0000 | [diff] [blame] | 395 | |
| 396 | llvm::GlobalVariable::ThreadLocalMode TLM; |
Douglas Gregor | 4cdad31 | 2012-10-23 20:05:01 +0000 | [diff] [blame] | 397 | TLM = GetLLVMTLSModel(CodeGenOpts.getDefaultTLSModel()); |
Hans Wennborg | de981f3 | 2012-06-28 08:01:44 +0000 | [diff] [blame] | 398 | |
| 399 | // Override the TLS model if it is explicitly specified. |
| 400 | if (D.hasAttr<TLSModelAttr>()) { |
| 401 | const TLSModelAttr *Attr = D.getAttr<TLSModelAttr>(); |
| 402 | TLM = GetLLVMTLSModel(Attr->getModel()); |
| 403 | } |
| 404 | |
| 405 | GV->setThreadLocalMode(TLM); |
| 406 | } |
| 407 | |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 408 | /// Set the symbol visibility of type information (vtable and RTTI) |
| 409 | /// associated with the given type. |
| 410 | void CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV, |
| 411 | const CXXRecordDecl *RD, |
Anders Carlsson | fa2e99f | 2011-01-29 20:24:48 +0000 | [diff] [blame] | 412 | TypeVisibilityKind TVK) const { |
Anders Carlsson | 0ffeaad | 2011-01-29 19:39:23 +0000 | [diff] [blame] | 413 | setGlobalVisibility(GV, RD); |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 414 | |
John McCall | 279b5eb | 2010-08-12 23:36:15 +0000 | [diff] [blame] | 415 | if (!CodeGenOpts.HiddenWeakVTables) |
| 416 | return; |
| 417 | |
Anders Carlsson | 9a86a13 | 2011-01-29 20:36:11 +0000 | [diff] [blame] | 418 | // We never want to drop the visibility for RTTI names. |
| 419 | if (TVK == TVK_ForRTTIName) |
| 420 | return; |
| 421 | |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 422 | // We want to drop the visibility to hidden for weak type symbols. |
| 423 | // This isn't possible if there might be unresolved references |
| 424 | // elsewhere that rely on this symbol being visible. |
| 425 | |
John McCall | 7a53690 | 2010-08-05 20:39:18 +0000 | [diff] [blame] | 426 | // This should be kept roughly in sync with setThunkVisibility |
| 427 | // in CGVTables.cpp. |
| 428 | |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 429 | // Preconditions. |
Anders Carlsson | f502d93 | 2011-01-24 00:46:19 +0000 | [diff] [blame] | 430 | if (GV->getLinkage() != llvm::GlobalVariable::LinkOnceODRLinkage || |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 431 | GV->getVisibility() != llvm::GlobalVariable::DefaultVisibility) |
| 432 | return; |
| 433 | |
| 434 | // Don't override an explicit visibility attribute. |
John McCall | d4c3d66 | 2013-02-20 01:54:26 +0000 | [diff] [blame] | 435 | if (RD->getExplicitVisibility(NamedDecl::VisibilityForType)) |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 436 | return; |
| 437 | |
| 438 | switch (RD->getTemplateSpecializationKind()) { |
| 439 | // We have to disable the optimization if this is an EI definition |
| 440 | // because there might be EI declarations in other shared objects. |
| 441 | case TSK_ExplicitInstantiationDefinition: |
| 442 | case TSK_ExplicitInstantiationDeclaration: |
| 443 | return; |
| 444 | |
John McCall | 7a53690 | 2010-08-05 20:39:18 +0000 | [diff] [blame] | 445 | // 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] | 446 | case TSK_Undeclared: |
| 447 | break; |
| 448 | |
John McCall | 7a53690 | 2010-08-05 20:39:18 +0000 | [diff] [blame] | 449 | // In theory, implicit instantiations can ignore the possibility of |
| 450 | // an explicit instantiation declaration because there necessarily |
| 451 | // must be an EI definition somewhere with default visibility. In |
| 452 | // practice, it's possible to have an explicit instantiation for |
| 453 | // an arbitrary template class, and linkers aren't necessarily able |
| 454 | // to deal with mixed-visibility symbols. |
| 455 | case TSK_ExplicitSpecialization: |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 456 | case TSK_ImplicitInstantiation: |
Douglas Gregor | aafd111 | 2012-10-24 14:11:55 +0000 | [diff] [blame] | 457 | return; |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | // If there's a key function, there may be translation units |
| 461 | // that don't have the key function's definition. But ignore |
| 462 | // this if we're emitting RTTI under -fno-rtti. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 463 | if (!(TVK != TVK_ForRTTI) || LangOpts.RTTI) { |
John McCall | d5617ee | 2013-01-25 22:31:03 +0000 | [diff] [blame] | 464 | // FIXME: what should we do if we "lose" the key function during |
| 465 | // the emission of the file? |
| 466 | if (Context.getCurrentKeyFunction(RD)) |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 467 | return; |
Anders Carlsson | fa2e99f | 2011-01-29 20:24:48 +0000 | [diff] [blame] | 468 | } |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 469 | |
| 470 | // Otherwise, drop the visibility to hidden. |
| 471 | GV->setVisibility(llvm::GlobalValue::HiddenVisibility); |
Rafael Espindola | b1c65ff | 2011-01-11 21:44:37 +0000 | [diff] [blame] | 472 | GV->setUnnamedAddr(true); |
John McCall | cbfe502 | 2010-08-04 08:34:44 +0000 | [diff] [blame] | 473 | } |
| 474 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 475 | StringRef CodeGenModule::getMangledName(GlobalDecl GD) { |
Anders Carlsson | 793a990 | 2010-06-22 16:05:32 +0000 | [diff] [blame] | 476 | const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); |
| 477 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 478 | StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; |
Anders Carlsson | 793a990 | 2010-06-22 16:05:32 +0000 | [diff] [blame] | 479 | if (!Str.empty()) |
| 480 | return Str; |
| 481 | |
John McCall | 4c40d98 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 482 | if (!getCXXABI().getMangleContext().shouldMangleDeclName(ND)) { |
Anders Carlsson | 793a990 | 2010-06-22 16:05:32 +0000 | [diff] [blame] | 483 | IdentifierInfo *II = ND->getIdentifier(); |
| 484 | assert(II && "Attempt to mangle unnamed decl."); |
| 485 | |
| 486 | Str = II->getName(); |
| 487 | return Str; |
| 488 | } |
| 489 | |
Dylan Noblesmith | f7ccbad | 2012-02-05 02:13:05 +0000 | [diff] [blame] | 490 | SmallString<256> Buffer; |
Rafael Espindola | c4850c2 | 2011-02-10 23:59:36 +0000 | [diff] [blame] | 491 | llvm::raw_svector_ostream Out(Buffer); |
Anders Carlsson | 793a990 | 2010-06-22 16:05:32 +0000 | [diff] [blame] | 492 | if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) |
Rafael Espindola | c4850c2 | 2011-02-10 23:59:36 +0000 | [diff] [blame] | 493 | getCXXABI().getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Out); |
Anders Carlsson | 793a990 | 2010-06-22 16:05:32 +0000 | [diff] [blame] | 494 | else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) |
Rafael Espindola | c4850c2 | 2011-02-10 23:59:36 +0000 | [diff] [blame] | 495 | getCXXABI().getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Out); |
Anders Carlsson | 793a990 | 2010-06-22 16:05:32 +0000 | [diff] [blame] | 496 | else |
Rafael Espindola | c4850c2 | 2011-02-10 23:59:36 +0000 | [diff] [blame] | 497 | getCXXABI().getMangleContext().mangleName(ND, Out); |
Anders Carlsson | 793a990 | 2010-06-22 16:05:32 +0000 | [diff] [blame] | 498 | |
| 499 | // Allocate space for the mangled name. |
Rafael Espindola | c4850c2 | 2011-02-10 23:59:36 +0000 | [diff] [blame] | 500 | Out.flush(); |
Anders Carlsson | 793a990 | 2010-06-22 16:05:32 +0000 | [diff] [blame] | 501 | size_t Length = Buffer.size(); |
| 502 | char *Name = MangledNamesAllocator.Allocate<char>(Length); |
| 503 | std::copy(Buffer.begin(), Buffer.end(), Name); |
| 504 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 505 | Str = StringRef(Name, Length); |
Anders Carlsson | 793a990 | 2010-06-22 16:05:32 +0000 | [diff] [blame] | 506 | |
| 507 | return Str; |
| 508 | } |
| 509 | |
Peter Collingbourne | 1411047 | 2011-01-13 18:57:25 +0000 | [diff] [blame] | 510 | void CodeGenModule::getBlockMangledName(GlobalDecl GD, MangleBuffer &Buffer, |
| 511 | const BlockDecl *BD) { |
| 512 | MangleContext &MangleCtx = getCXXABI().getMangleContext(); |
| 513 | const Decl *D = GD.getDecl(); |
Rafael Espindola | c4850c2 | 2011-02-10 23:59:36 +0000 | [diff] [blame] | 514 | llvm::raw_svector_ostream Out(Buffer.getBuffer()); |
Peter Collingbourne | 1411047 | 2011-01-13 18:57:25 +0000 | [diff] [blame] | 515 | if (D == 0) |
Fariborz Jahanian | 4904bf4 | 2012-06-26 16:06:38 +0000 | [diff] [blame] | 516 | MangleCtx.mangleGlobalBlock(BD, |
| 517 | dyn_cast_or_null<VarDecl>(initializedGlobalDecl.getDecl()), Out); |
Peter Collingbourne | 1411047 | 2011-01-13 18:57:25 +0000 | [diff] [blame] | 518 | else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) |
Rafael Espindola | c4850c2 | 2011-02-10 23:59:36 +0000 | [diff] [blame] | 519 | MangleCtx.mangleCtorBlock(CD, GD.getCtorType(), BD, Out); |
Peter Collingbourne | 1411047 | 2011-01-13 18:57:25 +0000 | [diff] [blame] | 520 | else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) |
Rafael Espindola | c4850c2 | 2011-02-10 23:59:36 +0000 | [diff] [blame] | 521 | MangleCtx.mangleDtorBlock(DD, GD.getDtorType(), BD, Out); |
Peter Collingbourne | 1411047 | 2011-01-13 18:57:25 +0000 | [diff] [blame] | 522 | else |
Rafael Espindola | c4850c2 | 2011-02-10 23:59:36 +0000 | [diff] [blame] | 523 | MangleCtx.mangleBlock(cast<DeclContext>(D), BD, Out); |
Anders Carlsson | 9a8822b | 2010-06-09 02:36:32 +0000 | [diff] [blame] | 524 | } |
| 525 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 526 | llvm::GlobalValue *CodeGenModule::GetGlobalValue(StringRef Name) { |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 527 | return getModule().getNamedValue(Name); |
Douglas Gregor | 5f2bfd4 | 2009-02-13 00:10:09 +0000 | [diff] [blame] | 528 | } |
| 529 | |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 530 | /// AddGlobalCtor - Add a function to the list that will be called before |
| 531 | /// main() runs. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 532 | void CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 533 | // FIXME: Type coercion of void()* types. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 534 | GlobalCtors.push_back(std::make_pair(Ctor, Priority)); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 535 | } |
| 536 | |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 537 | /// AddGlobalDtor - Add a function to the list that will be called |
| 538 | /// when the module is unloaded. |
| 539 | void CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 540 | // FIXME: Type coercion of void()* types. |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 541 | GlobalDtors.push_back(std::make_pair(Dtor, Priority)); |
| 542 | } |
| 543 | |
| 544 | void CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { |
| 545 | // Ctor function type is void()*. |
John McCall | 0774cb8 | 2011-05-15 01:53:33 +0000 | [diff] [blame] | 546 | llvm::FunctionType* CtorFTy = llvm::FunctionType::get(VoidTy, false); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 547 | llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 548 | |
| 549 | // Get the type of a ctor entry, { i32, void ()* }. |
Chris Lattner | c5cbb90 | 2011-06-20 04:01:35 +0000 | [diff] [blame] | 550 | llvm::StructType *CtorStructTy = |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 551 | llvm::StructType::get(Int32Ty, llvm::PointerType::getUnqual(CtorFTy), NULL); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 552 | |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 553 | // Construct the constructor and destructor arrays. |
Chris Lattner | 0b23971 | 2012-02-06 22:16:34 +0000 | [diff] [blame] | 554 | SmallVector<llvm::Constant*, 8> Ctors; |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 555 | for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { |
Chris Lattner | 0b23971 | 2012-02-06 22:16:34 +0000 | [diff] [blame] | 556 | llvm::Constant *S[] = { |
| 557 | llvm::ConstantInt::get(Int32Ty, I->second, false), |
| 558 | llvm::ConstantExpr::getBitCast(I->first, CtorPFTy) |
| 559 | }; |
Owen Anderson | 08e2524 | 2009-07-27 22:29:56 +0000 | [diff] [blame] | 560 | Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 561 | } |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 562 | |
| 563 | if (!Ctors.empty()) { |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 564 | llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 565 | new llvm::GlobalVariable(TheModule, AT, false, |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 566 | llvm::GlobalValue::AppendingLinkage, |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 567 | llvm::ConstantArray::get(AT, Ctors), |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 568 | GlobalName); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 569 | } |
Chris Lattner | 6d39760 | 2008-03-14 17:18:18 +0000 | [diff] [blame] | 570 | } |
| 571 | |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 572 | llvm::GlobalValue::LinkageTypes |
Peter Collingbourne | 144a31f | 2013-06-05 17:49:37 +0000 | [diff] [blame] | 573 | CodeGenModule::getFunctionLinkage(GlobalDecl GD) { |
Eli Friedman | 7a36a59 | 2013-07-01 20:53:07 +0000 | [diff] [blame] | 574 | const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); |
Reid Kleckner | a4130ba | 2013-07-22 13:51:44 +0000 | [diff] [blame] | 575 | |
| 576 | if (isa<CXXDestructorDecl>(D) && |
| 577 | getCXXABI().useThunkForDtorVariant(cast<CXXDestructorDecl>(D), |
| 578 | GD.getDtorType())) |
| 579 | return llvm::Function::LinkOnceODRLinkage; |
| 580 | |
Argyrios Kyrtzidis | 90e99a8 | 2010-07-29 18:15:58 +0000 | [diff] [blame] | 581 | GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 582 | |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 583 | if (Linkage == GVA_Internal) |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 584 | return llvm::Function::InternalLinkage; |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 585 | |
| 586 | if (D->hasAttr<DLLExportAttr>()) |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 587 | return llvm::Function::DLLExportLinkage; |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 588 | |
| 589 | if (D->hasAttr<WeakAttr>()) |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 590 | return llvm::Function::WeakAnyLinkage; |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 591 | |
| 592 | // In C99 mode, 'inline' functions are guaranteed to have a strong |
| 593 | // definition somewhere else, so we can use available_externally linkage. |
| 594 | if (Linkage == GVA_C99Inline) |
Fariborz Jahanian | fd0f89d | 2011-02-04 00:08:13 +0000 | [diff] [blame] | 595 | return llvm::Function::AvailableExternallyLinkage; |
John McCall | 5584d91 | 2011-09-19 18:05:26 +0000 | [diff] [blame] | 596 | |
| 597 | // Note that Apple's kernel linker doesn't support symbol |
| 598 | // coalescing, so we need to avoid linkonce and weak linkages there. |
| 599 | // Normally, this means we just map to internal, but for explicit |
| 600 | // instantiations we'll map to external. |
| 601 | |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 602 | // In C++, the compiler has to emit a definition in every translation unit |
| 603 | // that references the function. We should use linkonce_odr because |
| 604 | // a) if all references in this translation unit are optimized away, we |
| 605 | // don't need to codegen it. b) if the function persists, it needs to be |
| 606 | // merged with other definitions. c) C++ has the ODR, so we know the |
| 607 | // definition is dependable. |
| 608 | if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 609 | return !Context.getLangOpts().AppleKext |
Fariborz Jahanian | 142f9e9 | 2011-02-04 00:01:24 +0000 | [diff] [blame] | 610 | ? llvm::Function::LinkOnceODRLinkage |
| 611 | : llvm::Function::InternalLinkage; |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 612 | |
| 613 | // An explicit instantiation of a template has weak linkage, since |
| 614 | // explicit instantiations can occur in multiple translation units |
| 615 | // and must all be equivalent. However, we are not allowed to |
| 616 | // throw away these explicit instantiations. |
| 617 | if (Linkage == GVA_ExplicitTemplateInstantiation) |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 618 | return !Context.getLangOpts().AppleKext |
Fariborz Jahanian | 142f9e9 | 2011-02-04 00:01:24 +0000 | [diff] [blame] | 619 | ? llvm::Function::WeakODRLinkage |
John McCall | 5584d91 | 2011-09-19 18:05:26 +0000 | [diff] [blame] | 620 | : llvm::Function::ExternalLinkage; |
Chris Lattner | f8153065 | 2010-06-30 16:58:07 +0000 | [diff] [blame] | 621 | |
| 622 | // Otherwise, we have strong external linkage. |
| 623 | assert(Linkage == GVA_StrongExternal); |
| 624 | return llvm::Function::ExternalLinkage; |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 625 | } |
Nuno Lopes | d4cbda6 | 2008-06-08 15:45:52 +0000 | [diff] [blame] | 626 | |
John McCall | d46f985 | 2010-02-19 01:32:20 +0000 | [diff] [blame] | 627 | |
| 628 | /// SetFunctionDefinitionAttributes - Set attributes for a global. |
| 629 | /// |
| 630 | /// FIXME: This is currently only done for aliases and functions, but not for |
| 631 | /// variables (these details are set in EmitGlobalVarDefinition for variables). |
| 632 | void CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, |
| 633 | llvm::GlobalValue *GV) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 634 | SetCommonAttributes(D, GV); |
Nuno Lopes | d4cbda6 | 2008-06-08 15:45:52 +0000 | [diff] [blame] | 635 | } |
| 636 | |
Daniel Dunbar | 7dbd819 | 2009-04-14 07:08:30 +0000 | [diff] [blame] | 637 | void CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 638 | const CGFunctionInfo &Info, |
Daniel Dunbar | 7dbd819 | 2009-04-14 07:08:30 +0000 | [diff] [blame] | 639 | llvm::Function *F) { |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 640 | unsigned CallingConv; |
Devang Patel | 761d7f7 | 2008-09-25 21:02:23 +0000 | [diff] [blame] | 641 | AttributeListType AttributeList; |
Bill Wendling | 94236e7 | 2013-02-22 00:13:35 +0000 | [diff] [blame] | 642 | ConstructAttributeList(Info, D, AttributeList, CallingConv, false); |
Bill Wendling | 785b778 | 2012-12-07 23:17:26 +0000 | [diff] [blame] | 643 | F->setAttributes(llvm::AttributeSet::get(getLLVMContext(), AttributeList)); |
Daniel Dunbar | ca6408c | 2009-09-12 00:59:20 +0000 | [diff] [blame] | 644 | F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 645 | } |
| 646 | |
John McCall | d1e40d5 | 2011-10-02 01:16:38 +0000 | [diff] [blame] | 647 | /// Determines whether the language options require us to model |
| 648 | /// unwind exceptions. We treat -fexceptions as mandating this |
| 649 | /// except under the fragile ObjC ABI with only ObjC exceptions |
| 650 | /// enabled. This means, for example, that C with -fexceptions |
| 651 | /// enables this. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 652 | static bool hasUnwindExceptions(const LangOptions &LangOpts) { |
John McCall | d1e40d5 | 2011-10-02 01:16:38 +0000 | [diff] [blame] | 653 | // If exceptions are completely disabled, obviously this is false. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 654 | if (!LangOpts.Exceptions) return false; |
John McCall | d1e40d5 | 2011-10-02 01:16:38 +0000 | [diff] [blame] | 655 | |
| 656 | // If C++ exceptions are enabled, this is true. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 657 | if (LangOpts.CXXExceptions) return true; |
John McCall | d1e40d5 | 2011-10-02 01:16:38 +0000 | [diff] [blame] | 658 | |
| 659 | // If ObjC exceptions are enabled, this depends on the ABI. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 660 | if (LangOpts.ObjCExceptions) { |
David Chisnall | 11d3f4c | 2012-07-03 20:49:52 +0000 | [diff] [blame] | 661 | return LangOpts.ObjCRuntime.hasUnwindExceptions(); |
John McCall | d1e40d5 | 2011-10-02 01:16:38 +0000 | [diff] [blame] | 662 | } |
| 663 | |
| 664 | return true; |
| 665 | } |
| 666 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 667 | void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, |
| 668 | llvm::Function *F) { |
Benjamin Kramer | 06a9d04 | 2013-05-11 12:45:37 +0000 | [diff] [blame] | 669 | llvm::AttrBuilder B; |
| 670 | |
Rafael Espindola | abca5a1 | 2011-05-25 03:44:55 +0000 | [diff] [blame] | 671 | if (CodeGenOpts.UnwindTables) |
Benjamin Kramer | 06a9d04 | 2013-05-11 12:45:37 +0000 | [diff] [blame] | 672 | B.addAttribute(llvm::Attribute::UWTable); |
Rafael Espindola | abca5a1 | 2011-05-25 03:44:55 +0000 | [diff] [blame] | 673 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 674 | if (!hasUnwindExceptions(LangOpts)) |
Benjamin Kramer | 06a9d04 | 2013-05-11 12:45:37 +0000 | [diff] [blame] | 675 | B.addAttribute(llvm::Attribute::NoUnwind); |
Daniel Dunbar | af668b0 | 2008-10-28 00:17:57 +0000 | [diff] [blame] | 676 | |
Eli Friedman | 2873aee | 2011-08-22 23:55:33 +0000 | [diff] [blame] | 677 | if (D->hasAttr<NakedAttr>()) { |
| 678 | // Naked implies noinline: we should not be inlining such functions. |
Benjamin Kramer | 06a9d04 | 2013-05-11 12:45:37 +0000 | [diff] [blame] | 679 | B.addAttribute(llvm::Attribute::Naked); |
| 680 | B.addAttribute(llvm::Attribute::NoInline); |
| 681 | } else if (D->hasAttr<NoInlineAttr>()) { |
| 682 | B.addAttribute(llvm::Attribute::NoInline); |
| 683 | } else if ((D->hasAttr<AlwaysInlineAttr>() || |
| 684 | D->hasAttr<ForceInlineAttr>()) && |
| 685 | !F->getAttributes().hasAttribute(llvm::AttributeSet::FunctionIndex, |
| 686 | llvm::Attribute::NoInline)) { |
| 687 | // (noinline wins over always_inline, and we can't specify both in IR) |
| 688 | B.addAttribute(llvm::Attribute::AlwaysInline); |
Eli Friedman | 2873aee | 2011-08-22 23:55:33 +0000 | [diff] [blame] | 689 | } |
Daniel Dunbar | dd0cb22 | 2010-09-29 18:20:25 +0000 | [diff] [blame] | 690 | |
Diego Novillo | d27e5cb | 2013-05-24 20:18:15 +0000 | [diff] [blame] | 691 | if (D->hasAttr<ColdAttr>()) { |
Benjamin Kramer | 06a9d04 | 2013-05-11 12:45:37 +0000 | [diff] [blame] | 692 | B.addAttribute(llvm::Attribute::OptimizeForSize); |
Diego Novillo | d27e5cb | 2013-05-24 20:18:15 +0000 | [diff] [blame] | 693 | B.addAttribute(llvm::Attribute::Cold); |
| 694 | } |
Benjamin Kramer | ee409a9 | 2012-05-12 21:10:52 +0000 | [diff] [blame] | 695 | |
Quentin Colombet | aee56fa | 2012-11-01 23:55:47 +0000 | [diff] [blame] | 696 | if (D->hasAttr<MinSizeAttr>()) |
Benjamin Kramer | 06a9d04 | 2013-05-11 12:45:37 +0000 | [diff] [blame] | 697 | B.addAttribute(llvm::Attribute::MinSize); |
Richard Smith | ef4d5ce | 2012-09-28 22:46:07 +0000 | [diff] [blame] | 698 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 699 | if (LangOpts.getStackProtector() == LangOptions::SSPOn) |
Benjamin Kramer | 06a9d04 | 2013-05-11 12:45:37 +0000 | [diff] [blame] | 700 | B.addAttribute(llvm::Attribute::StackProtect); |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 701 | else if (LangOpts.getStackProtector() == LangOptions::SSPReq) |
Benjamin Kramer | 06a9d04 | 2013-05-11 12:45:37 +0000 | [diff] [blame] | 702 | B.addAttribute(llvm::Attribute::StackProtectReq); |
Will Dietz | 4f45bc0 | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 703 | |
Alexey Samsonov | 7e73f94 | 2013-03-06 10:54:18 +0000 | [diff] [blame] | 704 | // Add sanitizer attributes if function is not blacklisted. |
Alexey Samsonov | 6a4c5dc | 2013-08-12 11:48:05 +0000 | [diff] [blame] | 705 | if (!SanitizerBlacklist->isIn(*F)) { |
Alexey Samsonov | 7e73f94 | 2013-03-06 10:54:18 +0000 | [diff] [blame] | 706 | // When AddressSanitizer is enabled, set SanitizeAddress attribute |
| 707 | // unless __attribute__((no_sanitize_address)) is used. |
| 708 | if (SanOpts.Address && !D->hasAttr<NoSanitizeAddressAttr>()) |
Benjamin Kramer | 06a9d04 | 2013-05-11 12:45:37 +0000 | [diff] [blame] | 709 | B.addAttribute(llvm::Attribute::SanitizeAddress); |
Alexey Samsonov | 7e73f94 | 2013-03-06 10:54:18 +0000 | [diff] [blame] | 710 | // Same for ThreadSanitizer and __attribute__((no_sanitize_thread)) |
| 711 | if (SanOpts.Thread && !D->hasAttr<NoSanitizeThreadAttr>()) { |
Benjamin Kramer | 06a9d04 | 2013-05-11 12:45:37 +0000 | [diff] [blame] | 712 | B.addAttribute(llvm::Attribute::SanitizeThread); |
Alexey Samsonov | 7e73f94 | 2013-03-06 10:54:18 +0000 | [diff] [blame] | 713 | } |
| 714 | // Same for MemorySanitizer and __attribute__((no_sanitize_memory)) |
| 715 | if (SanOpts.Memory && !D->hasAttr<NoSanitizeMemoryAttr>()) |
Benjamin Kramer | 06a9d04 | 2013-05-11 12:45:37 +0000 | [diff] [blame] | 716 | B.addAttribute(llvm::Attribute::SanitizeMemory); |
Alexey Samsonov | 7e73f94 | 2013-03-06 10:54:18 +0000 | [diff] [blame] | 717 | } |
Alexander Potapenko | 89651ea | 2012-02-02 11:49:28 +0000 | [diff] [blame] | 718 | |
Benjamin Kramer | 06a9d04 | 2013-05-11 12:45:37 +0000 | [diff] [blame] | 719 | F->addAttributes(llvm::AttributeSet::FunctionIndex, |
| 720 | llvm::AttributeSet::get( |
| 721 | F->getContext(), llvm::AttributeSet::FunctionIndex, B)); |
| 722 | |
| 723 | if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) |
| 724 | F->setUnnamedAddr(true); |
| 725 | else if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) |
| 726 | if (MD->isVirtual()) |
| 727 | F->setUnnamedAddr(true); |
| 728 | |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 729 | unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); |
| 730 | if (alignment) |
| 731 | F->setAlignment(alignment); |
| 732 | |
Mike Stump | fb51ddf | 2009-10-05 22:49:20 +0000 | [diff] [blame] | 733 | // C++ ABI requires 2-byte alignment for member functions. |
Mike Stump | bd6dbd1 | 2009-10-05 23:08:21 +0000 | [diff] [blame] | 734 | if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) |
| 735 | F->setAlignment(2); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 736 | } |
| 737 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 738 | void CodeGenModule::SetCommonAttributes(const Decl *D, |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 739 | llvm::GlobalValue *GV) { |
Anders Carlsson | 934176f | 2011-01-29 19:41:00 +0000 | [diff] [blame] | 740 | if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) |
| 741 | setGlobalVisibility(GV, ND); |
John McCall | 1fb0caa | 2010-10-22 21:05:15 +0000 | [diff] [blame] | 742 | else |
| 743 | GV->setVisibility(llvm::GlobalValue::DefaultVisibility); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 744 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 745 | if (D->hasAttr<UsedAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 746 | AddUsedGlobal(GV); |
| 747 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 748 | if (const SectionAttr *SA = D->getAttr<SectionAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 749 | GV->setSection(SA->getName()); |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 750 | |
Rafael Espindola | 9a2f5d7 | 2013-03-19 15:03:47 +0000 | [diff] [blame] | 751 | // Alias cannot have attributes. Filter them here. |
| 752 | if (!isa<llvm::GlobalAlias>(GV)) |
| 753 | getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 754 | } |
| 755 | |
Daniel Dunbar | 0e4f40e | 2009-04-17 00:48:04 +0000 | [diff] [blame] | 756 | void CodeGenModule::SetInternalFunctionAttributes(const Decl *D, |
| 757 | llvm::Function *F, |
| 758 | const CGFunctionInfo &FI) { |
| 759 | SetLLVMFunctionAttributes(D, FI, F); |
| 760 | SetLLVMFunctionAttributesForDefinition(D, F); |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 761 | |
| 762 | F->setLinkage(llvm::Function::InternalLinkage); |
| 763 | |
Daniel Dunbar | 0e4f40e | 2009-04-17 00:48:04 +0000 | [diff] [blame] | 764 | SetCommonAttributes(D, F); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 765 | } |
| 766 | |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 767 | void CodeGenModule::SetFunctionAttributes(GlobalDecl GD, |
Eli Friedman | c6c14d1 | 2009-05-26 01:22:57 +0000 | [diff] [blame] | 768 | llvm::Function *F, |
| 769 | bool IsIncompleteFunction) { |
Peter Collingbourne | 0ac2cf4 | 2011-04-06 12:29:04 +0000 | [diff] [blame] | 770 | if (unsigned IID = F->getIntrinsicID()) { |
| 771 | // If this is an intrinsic function, set the function's attributes |
| 772 | // to the intrinsic's attributes. |
Bill Wendling | 50e6b18 | 2012-10-15 04:47:45 +0000 | [diff] [blame] | 773 | F->setAttributes(llvm::Intrinsic::getAttributes(getLLVMContext(), |
| 774 | (llvm::Intrinsic::ID)IID)); |
Peter Collingbourne | 0ac2cf4 | 2011-04-06 12:29:04 +0000 | [diff] [blame] | 775 | return; |
| 776 | } |
| 777 | |
Anders Carlsson | b2bcf1c | 2010-02-06 02:44:09 +0000 | [diff] [blame] | 778 | const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); |
| 779 | |
Eli Friedman | c6c14d1 | 2009-05-26 01:22:57 +0000 | [diff] [blame] | 780 | if (!IsIncompleteFunction) |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 781 | SetLLVMFunctionAttributes(FD, getTypes().arrangeGlobalDeclaration(GD), F); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 782 | |
Stephen Lin | 3b50e8d | 2013-06-30 20:40:16 +0000 | [diff] [blame] | 783 | if (getCXXABI().HasThisReturn(GD)) { |
| 784 | assert(!F->arg_empty() && |
| 785 | F->arg_begin()->getType() |
| 786 | ->canLosslesslyBitCastTo(F->getReturnType()) && |
| 787 | "unexpected this return"); |
| 788 | F->addAttribute(1, llvm::Attribute::Returned); |
| 789 | } |
| 790 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 791 | // Only a few attributes are set on declarations; these may later be |
| 792 | // overridden by a definition. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 793 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 794 | if (FD->hasAttr<DLLImportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 795 | F->setLinkage(llvm::Function::DLLImportLinkage); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 796 | } else if (FD->hasAttr<WeakAttr>() || |
Douglas Gregor | 0a0d2b1 | 2011-03-23 00:50:03 +0000 | [diff] [blame] | 797 | FD->isWeakImported()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 798 | // "extern_weak" is overloaded in LLVM; we probably should have |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 799 | // separate linkage types for this. |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 800 | F->setLinkage(llvm::Function::ExternalWeakLinkage); |
| 801 | } else { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 802 | F->setLinkage(llvm::Function::ExternalLinkage); |
John McCall | af14603 | 2010-10-30 11:50:40 +0000 | [diff] [blame] | 803 | |
Rafael Espindola | 2beda12 | 2013-02-27 02:15:29 +0000 | [diff] [blame] | 804 | LinkageInfo LV = FD->getLinkageAndVisibility(); |
Rafael Espindola | f127eb8 | 2013-02-27 02:56:45 +0000 | [diff] [blame] | 805 | if (LV.getLinkage() == ExternalLinkage && LV.isVisibilityExplicit()) { |
| 806 | F->setVisibility(GetLLVMVisibility(LV.getVisibility())); |
John McCall | af14603 | 2010-10-30 11:50:40 +0000 | [diff] [blame] | 807 | } |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 808 | } |
| 809 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 810 | if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 811 | F->setSection(SA->getName()); |
Richard Smith | ddcff1b | 2013-07-21 23:12:18 +0000 | [diff] [blame] | 812 | |
| 813 | // A replaceable global allocation function does not act like a builtin by |
| 814 | // default, only if it is invoked by a new-expression or delete-expression. |
| 815 | if (FD->isReplaceableGlobalAllocationFunction()) |
| 816 | F->addAttribute(llvm::AttributeSet::FunctionIndex, |
| 817 | llvm::Attribute::NoBuiltin); |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 818 | } |
| 819 | |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 820 | void CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 821 | assert(!GV->isDeclaration() && |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 822 | "Only globals with definition can force usage."); |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 823 | LLVMUsed.push_back(GV); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 824 | } |
| 825 | |
| 826 | void CodeGenModule::EmitLLVMUsed() { |
| 827 | // Don't create llvm.used if there is no need. |
Chris Lattner | ad64e02 | 2009-07-17 23:57:13 +0000 | [diff] [blame] | 828 | if (LLVMUsed.empty()) |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 829 | return; |
| 830 | |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 831 | // Convert LLVMUsed to what ConstantArray needs. |
Chris Lattner | 0b23971 | 2012-02-06 22:16:34 +0000 | [diff] [blame] | 832 | SmallVector<llvm::Constant*, 8> UsedArray; |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 833 | UsedArray.resize(LLVMUsed.size()); |
| 834 | for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 835 | UsedArray[i] = |
| 836 | llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), |
Chris Lattner | 0b23971 | 2012-02-06 22:16:34 +0000 | [diff] [blame] | 837 | Int8PtrTy); |
Chris Lattner | 35f38a2 | 2009-03-31 22:37:52 +0000 | [diff] [blame] | 838 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 839 | |
Fariborz Jahanian | c38e9af | 2009-06-23 21:47:46 +0000 | [diff] [blame] | 840 | if (UsedArray.empty()) |
| 841 | return; |
Chris Lattner | 0b23971 | 2012-02-06 22:16:34 +0000 | [diff] [blame] | 842 | llvm::ArrayType *ATy = llvm::ArrayType::get(Int8PtrTy, UsedArray.size()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 843 | |
| 844 | llvm::GlobalVariable *GV = |
| 845 | new llvm::GlobalVariable(getModule(), ATy, false, |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 846 | llvm::GlobalValue::AppendingLinkage, |
Owen Anderson | 7db6d83 | 2009-07-28 18:33:04 +0000 | [diff] [blame] | 847 | llvm::ConstantArray::get(ATy, UsedArray), |
Owen Anderson | 1c431b3 | 2009-07-08 19:05:04 +0000 | [diff] [blame] | 848 | "llvm.used"); |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 849 | |
| 850 | GV->setSection("llvm.metadata"); |
| 851 | } |
| 852 | |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 853 | void CodeGenModule::AppendLinkerOptions(StringRef Opts) { |
| 854 | llvm::Value *MDOpts = llvm::MDString::get(getLLVMContext(), Opts); |
| 855 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(getLLVMContext(), MDOpts)); |
| 856 | } |
| 857 | |
Aaron Ballman | a7ff62f | 2013-06-04 02:07:14 +0000 | [diff] [blame] | 858 | void CodeGenModule::AddDetectMismatch(StringRef Name, StringRef Value) { |
| 859 | llvm::SmallString<32> Opt; |
| 860 | getTargetCodeGenInfo().getDetectMismatchOption(Name, Value, Opt); |
| 861 | llvm::Value *MDOpts = llvm::MDString::get(getLLVMContext(), Opt); |
| 862 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(getLLVMContext(), MDOpts)); |
| 863 | } |
| 864 | |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 865 | void CodeGenModule::AddDependentLib(StringRef Lib) { |
| 866 | llvm::SmallString<24> Opt; |
| 867 | getTargetCodeGenInfo().getDependentLibraryOption(Lib, Opt); |
| 868 | llvm::Value *MDOpts = llvm::MDString::get(getLLVMContext(), Opt); |
| 869 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(getLLVMContext(), MDOpts)); |
| 870 | } |
| 871 | |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 872 | /// \brief Add link options implied by the given module, including modules |
| 873 | /// it depends on, using a postorder walk. |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 874 | static void addLinkOptionsPostorder(CodeGenModule &CGM, |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 875 | Module *Mod, |
Daniel Dunbar | f9d03c1 | 2013-01-17 01:35:06 +0000 | [diff] [blame] | 876 | SmallVectorImpl<llvm::Value *> &Metadata, |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 877 | llvm::SmallPtrSet<Module *, 16> &Visited) { |
| 878 | // Import this module's parent. |
| 879 | if (Mod->Parent && Visited.insert(Mod->Parent)) { |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 880 | addLinkOptionsPostorder(CGM, Mod->Parent, Metadata, Visited); |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 881 | } |
| 882 | |
| 883 | // Import this module's dependencies. |
| 884 | for (unsigned I = Mod->Imports.size(); I > 0; --I) { |
| 885 | if (Visited.insert(Mod->Imports[I-1])) |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 886 | addLinkOptionsPostorder(CGM, Mod->Imports[I-1], Metadata, Visited); |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 887 | } |
| 888 | |
| 889 | // Add linker options to link against the libraries/frameworks |
| 890 | // described by this module. |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 891 | llvm::LLVMContext &Context = CGM.getLLVMContext(); |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 892 | for (unsigned I = Mod->LinkLibraries.size(); I > 0; --I) { |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 893 | // Link against a framework. Frameworks are currently Darwin only, so we |
| 894 | // don't to ask TargetCodeGenInfo for the spelling of the linker option. |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 895 | if (Mod->LinkLibraries[I-1].IsFramework) { |
| 896 | llvm::Value *Args[2] = { |
| 897 | llvm::MDString::get(Context, "-framework"), |
| 898 | llvm::MDString::get(Context, Mod->LinkLibraries[I-1].Library) |
| 899 | }; |
| 900 | |
| 901 | Metadata.push_back(llvm::MDNode::get(Context, Args)); |
| 902 | continue; |
| 903 | } |
| 904 | |
| 905 | // Link against a library. |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 906 | llvm::SmallString<24> Opt; |
| 907 | CGM.getTargetCodeGenInfo().getDependentLibraryOption( |
| 908 | Mod->LinkLibraries[I-1].Library, Opt); |
| 909 | llvm::Value *OptString = llvm::MDString::get(Context, Opt); |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 910 | Metadata.push_back(llvm::MDNode::get(Context, OptString)); |
| 911 | } |
| 912 | } |
| 913 | |
| 914 | void CodeGenModule::EmitModuleLinkOptions() { |
| 915 | // Collect the set of all of the modules we want to visit to emit link |
| 916 | // options, which is essentially the imported modules and all of their |
| 917 | // non-explicit child modules. |
| 918 | llvm::SetVector<clang::Module *> LinkModules; |
| 919 | llvm::SmallPtrSet<clang::Module *, 16> Visited; |
| 920 | SmallVector<clang::Module *, 16> Stack; |
| 921 | |
| 922 | // Seed the stack with imported modules. |
| 923 | for (llvm::SetVector<clang::Module *>::iterator M = ImportedModules.begin(), |
| 924 | MEnd = ImportedModules.end(); |
| 925 | M != MEnd; ++M) { |
| 926 | if (Visited.insert(*M)) |
| 927 | Stack.push_back(*M); |
| 928 | } |
| 929 | |
| 930 | // Find all of the modules to import, making a little effort to prune |
| 931 | // non-leaf modules. |
| 932 | while (!Stack.empty()) { |
Robert Wilhelm | 344472e | 2013-08-23 16:11:15 +0000 | [diff] [blame] | 933 | clang::Module *Mod = Stack.pop_back_val(); |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 934 | |
| 935 | bool AnyChildren = false; |
| 936 | |
| 937 | // Visit the submodules of this module. |
| 938 | for (clang::Module::submodule_iterator Sub = Mod->submodule_begin(), |
| 939 | SubEnd = Mod->submodule_end(); |
| 940 | Sub != SubEnd; ++Sub) { |
| 941 | // Skip explicit children; they need to be explicitly imported to be |
| 942 | // linked against. |
| 943 | if ((*Sub)->IsExplicit) |
| 944 | continue; |
| 945 | |
| 946 | if (Visited.insert(*Sub)) { |
| 947 | Stack.push_back(*Sub); |
| 948 | AnyChildren = true; |
| 949 | } |
| 950 | } |
| 951 | |
| 952 | // We didn't find any children, so add this module to the list of |
| 953 | // modules to link against. |
| 954 | if (!AnyChildren) { |
| 955 | LinkModules.insert(Mod); |
| 956 | } |
| 957 | } |
| 958 | |
| 959 | // Add link options for all of the imported modules in reverse topological |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 960 | // order. We don't do anything to try to order import link flags with respect |
| 961 | // to linker options inserted by things like #pragma comment(). |
Daniel Dunbar | f9d03c1 | 2013-01-17 01:35:06 +0000 | [diff] [blame] | 962 | SmallVector<llvm::Value *, 16> MetadataArgs; |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 963 | Visited.clear(); |
| 964 | for (llvm::SetVector<clang::Module *>::iterator M = LinkModules.begin(), |
| 965 | MEnd = LinkModules.end(); |
| 966 | M != MEnd; ++M) { |
| 967 | if (Visited.insert(*M)) |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 968 | addLinkOptionsPostorder(*this, *M, MetadataArgs, Visited); |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 969 | } |
Daniel Dunbar | f9d03c1 | 2013-01-17 01:35:06 +0000 | [diff] [blame] | 970 | std::reverse(MetadataArgs.begin(), MetadataArgs.end()); |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 971 | LinkerOptionsMetadata.append(MetadataArgs.begin(), MetadataArgs.end()); |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 972 | |
Daniel Dunbar | f9d03c1 | 2013-01-17 01:35:06 +0000 | [diff] [blame] | 973 | // Add the linker options metadata flag. |
| 974 | getModule().addModuleFlag(llvm::Module::AppendUnique, "Linker Options", |
Reid Kleckner | 3190ca9 | 2013-05-08 13:44:39 +0000 | [diff] [blame] | 975 | llvm::MDNode::get(getLLVMContext(), |
| 976 | LinkerOptionsMetadata)); |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 977 | } |
| 978 | |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 979 | void CodeGenModule::EmitDeferred() { |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 980 | // Emit code for any potentially referenced deferred decls. Since a |
| 981 | // previously unused static decl may become used during the generation of code |
Nick Lewycky | dce67a7 | 2011-07-18 05:26:13 +0000 | [diff] [blame] | 982 | // for a static function, iterate until no changes are made. |
Rafael Espindola | bbf58bb | 2010-03-10 02:19:29 +0000 | [diff] [blame] | 983 | |
John McCall | d5617ee | 2013-01-25 22:31:03 +0000 | [diff] [blame] | 984 | while (true) { |
Anders Carlsson | 046c294 | 2010-04-17 20:15:18 +0000 | [diff] [blame] | 985 | if (!DeferredVTables.empty()) { |
John McCall | d5617ee | 2013-01-25 22:31:03 +0000 | [diff] [blame] | 986 | EmitDeferredVTables(); |
| 987 | |
| 988 | // Emitting a v-table doesn't directly cause more v-tables to |
| 989 | // become deferred, although it can cause functions to be |
| 990 | // emitted that then need those v-tables. |
| 991 | assert(DeferredVTables.empty()); |
Rafael Espindola | bbf58bb | 2010-03-10 02:19:29 +0000 | [diff] [blame] | 992 | } |
| 993 | |
John McCall | d5617ee | 2013-01-25 22:31:03 +0000 | [diff] [blame] | 994 | // Stop if we're out of both deferred v-tables and deferred declarations. |
| 995 | if (DeferredDeclsToEmit.empty()) break; |
| 996 | |
Anders Carlsson | 2a131fb | 2009-05-05 04:44:02 +0000 | [diff] [blame] | 997 | GlobalDecl D = DeferredDeclsToEmit.back(); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 998 | DeferredDeclsToEmit.pop_back(); |
| 999 | |
John McCall | c76702c | 2010-05-27 01:45:30 +0000 | [diff] [blame] | 1000 | // Check to see if we've already emitted this. This is necessary |
| 1001 | // for a couple of reasons: first, decls can end up in the |
| 1002 | // deferred-decls queue multiple times, and second, decls can end |
| 1003 | // up with definitions in unusual ways (e.g. by an extern inline |
| 1004 | // function acquiring a strong function redefinition). Just |
| 1005 | // ignore these cases. |
| 1006 | // |
| 1007 | // TODO: That said, looking this up multiple times is very wasteful. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1008 | StringRef Name = getMangledName(D); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1009 | llvm::GlobalValue *CGRef = GetGlobalValue(Name); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 1010 | assert(CGRef && "Deferred decl wasn't referenced?"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1011 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 1012 | if (!CGRef->isDeclaration()) |
| 1013 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1014 | |
John McCall | c76702c | 2010-05-27 01:45:30 +0000 | [diff] [blame] | 1015 | // GlobalAlias::isDeclaration() defers to the aliasee, but for our |
| 1016 | // purposes an alias counts as a definition. |
| 1017 | if (isa<llvm::GlobalAlias>(CGRef)) |
| 1018 | continue; |
| 1019 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 1020 | // Otherwise, emit the definition and move on to the next one. |
| 1021 | EmitGlobalDefinition(D); |
| 1022 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1023 | } |
| 1024 | |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1025 | void CodeGenModule::EmitGlobalAnnotations() { |
| 1026 | if (Annotations.empty()) |
| 1027 | return; |
| 1028 | |
| 1029 | // Create a new global variable for the ConstantStruct in the Module. |
| 1030 | llvm::Constant *Array = llvm::ConstantArray::get(llvm::ArrayType::get( |
| 1031 | Annotations[0]->getType(), Annotations.size()), Annotations); |
| 1032 | llvm::GlobalValue *gv = new llvm::GlobalVariable(getModule(), |
| 1033 | Array->getType(), false, llvm::GlobalValue::AppendingLinkage, Array, |
| 1034 | "llvm.global.annotations"); |
| 1035 | gv->setSection(AnnotationSection); |
| 1036 | } |
| 1037 | |
Dmitri Gribenko | cfa88f8 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 1038 | llvm::Constant *CodeGenModule::EmitAnnotationString(StringRef Str) { |
Benjamin Kramer | 471b52a | 2013-11-10 16:55:11 +0000 | [diff] [blame] | 1039 | llvm::Constant *&AStr = AnnotationStrings[Str]; |
| 1040 | if (AStr) |
| 1041 | return AStr; |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1042 | |
| 1043 | // Not found yet, create a new global. |
Chris Lattner | 9401069 | 2012-02-05 02:30:40 +0000 | [diff] [blame] | 1044 | llvm::Constant *s = llvm::ConstantDataArray::getString(getLLVMContext(), Str); |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1045 | llvm::GlobalValue *gv = new llvm::GlobalVariable(getModule(), s->getType(), |
| 1046 | true, llvm::GlobalValue::PrivateLinkage, s, ".str"); |
| 1047 | gv->setSection(AnnotationSection); |
| 1048 | gv->setUnnamedAddr(true); |
Benjamin Kramer | 471b52a | 2013-11-10 16:55:11 +0000 | [diff] [blame] | 1049 | AStr = gv; |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1050 | return gv; |
| 1051 | } |
| 1052 | |
| 1053 | llvm::Constant *CodeGenModule::EmitAnnotationUnit(SourceLocation Loc) { |
| 1054 | SourceManager &SM = getContext().getSourceManager(); |
| 1055 | PresumedLoc PLoc = SM.getPresumedLoc(Loc); |
| 1056 | if (PLoc.isValid()) |
| 1057 | return EmitAnnotationString(PLoc.getFilename()); |
| 1058 | return EmitAnnotationString(SM.getBufferName(Loc)); |
| 1059 | } |
| 1060 | |
| 1061 | llvm::Constant *CodeGenModule::EmitAnnotationLineNo(SourceLocation L) { |
| 1062 | SourceManager &SM = getContext().getSourceManager(); |
| 1063 | PresumedLoc PLoc = SM.getPresumedLoc(L); |
| 1064 | unsigned LineNo = PLoc.isValid() ? PLoc.getLine() : |
| 1065 | SM.getExpansionLineNumber(L); |
| 1066 | return llvm::ConstantInt::get(Int32Ty, LineNo); |
| 1067 | } |
| 1068 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1069 | llvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1070 | const AnnotateAttr *AA, |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1071 | SourceLocation L) { |
| 1072 | // Get the globals for file name, annotation, and the line number. |
| 1073 | llvm::Constant *AnnoGV = EmitAnnotationString(AA->getAnnotation()), |
| 1074 | *UnitGV = EmitAnnotationUnit(L), |
| 1075 | *LineNoCst = EmitAnnotationLineNo(L); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1076 | |
Daniel Dunbar | 57d5cee | 2009-04-14 22:41:13 +0000 | [diff] [blame] | 1077 | // Create the ConstantStruct for the global annotation. |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1078 | llvm::Constant *Fields[4] = { |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1079 | llvm::ConstantExpr::getBitCast(GV, Int8PtrTy), |
| 1080 | llvm::ConstantExpr::getBitCast(AnnoGV, Int8PtrTy), |
| 1081 | llvm::ConstantExpr::getBitCast(UnitGV, Int8PtrTy), |
| 1082 | LineNoCst |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1083 | }; |
Chris Lattner | c5cbb90 | 2011-06-20 04:01:35 +0000 | [diff] [blame] | 1084 | return llvm::ConstantStruct::getAnon(Fields); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1085 | } |
| 1086 | |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1087 | void CodeGenModule::AddGlobalAnnotations(const ValueDecl *D, |
| 1088 | llvm::GlobalValue *GV) { |
| 1089 | assert(D->hasAttr<AnnotateAttr>() && "no annotate attribute"); |
| 1090 | // Get the struct elements for these annotations. |
| 1091 | for (specific_attr_iterator<AnnotateAttr> |
| 1092 | ai = D->specific_attr_begin<AnnotateAttr>(), |
| 1093 | ae = D->specific_attr_end<AnnotateAttr>(); ai != ae; ++ai) |
| 1094 | Annotations.push_back(EmitAnnotateAttr(GV, *ai, D->getLocation())); |
| 1095 | } |
| 1096 | |
Argyrios Kyrtzidis | a6d6af3 | 2010-07-27 22:37:14 +0000 | [diff] [blame] | 1097 | bool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { |
Argyrios Kyrtzidis | 90e99a8 | 2010-07-29 18:15:58 +0000 | [diff] [blame] | 1098 | // Never defer when EmitAllDecls is specified. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1099 | if (LangOpts.EmitAllDecls) |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 1100 | return false; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1101 | |
Argyrios Kyrtzidis | 4ac7c0b | 2010-07-29 20:08:05 +0000 | [diff] [blame] | 1102 | return !getContext().DeclMustBeEmitted(Global); |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 1103 | } |
| 1104 | |
Nico Weber | c5f8046 | 2012-10-11 10:13:44 +0000 | [diff] [blame] | 1105 | llvm::Constant *CodeGenModule::GetAddrOfUuidDescriptor( |
| 1106 | const CXXUuidofExpr* E) { |
| 1107 | // Sema has verified that IIDSource has a __declspec(uuid()), and that its |
| 1108 | // well-formed. |
David Majnemer | c80eb46 | 2013-08-13 06:32:20 +0000 | [diff] [blame] | 1109 | StringRef Uuid = E->getUuidAsStringRef(Context); |
David Majnemer | c8fe011 | 2013-08-09 08:35:59 +0000 | [diff] [blame] | 1110 | std::string Name = "_GUID_" + Uuid.lower(); |
| 1111 | std::replace(Name.begin(), Name.end(), '-', '_'); |
Nico Weber | c5f8046 | 2012-10-11 10:13:44 +0000 | [diff] [blame] | 1112 | |
| 1113 | // Look for an existing global. |
| 1114 | if (llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name)) |
| 1115 | return GV; |
| 1116 | |
| 1117 | llvm::Constant *Init = EmitUuidofInitializer(Uuid, E->getType()); |
| 1118 | assert(Init && "failed to initialize as constant"); |
| 1119 | |
David Majnemer | 8effeda | 2013-08-15 19:59:14 +0000 | [diff] [blame] | 1120 | llvm::GlobalVariable *GV = new llvm::GlobalVariable( |
| 1121 | getModule(), Init->getType(), |
Reid Kleckner | dc1ac5e | 2013-09-03 21:49:32 +0000 | [diff] [blame] | 1122 | /*isConstant=*/true, llvm::GlobalValue::LinkOnceODRLinkage, Init, Name); |
Nico Weber | c5f8046 | 2012-10-11 10:13:44 +0000 | [diff] [blame] | 1123 | return GV; |
| 1124 | } |
| 1125 | |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1126 | llvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { |
| 1127 | const AliasAttr *AA = VD->getAttr<AliasAttr>(); |
| 1128 | assert(AA && "No alias?"); |
| 1129 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1130 | llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1131 | |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1132 | // 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] | 1133 | llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); |
Joerg Sonnenberger | 4695f91 | 2012-10-16 17:45:27 +0000 | [diff] [blame] | 1134 | if (Entry) { |
| 1135 | unsigned AS = getContext().getTargetAddressSpace(VD->getType()); |
| 1136 | return llvm::ConstantExpr::getBitCast(Entry, DeclTy->getPointerTo(AS)); |
| 1137 | } |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1138 | |
| 1139 | llvm::Constant *Aliasee; |
| 1140 | if (isa<llvm::FunctionType>(DeclTy)) |
Alex Rosenberg | c857ce8 | 2012-10-05 23:12:53 +0000 | [diff] [blame] | 1141 | Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, |
| 1142 | GlobalDecl(cast<FunctionDecl>(VD)), |
Anders Carlsson | 1faa89f | 2011-02-05 04:35:53 +0000 | [diff] [blame] | 1143 | /*ForVTable=*/false); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1144 | else |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1145 | Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1146 | llvm::PointerType::getUnqual(DeclTy), 0); |
Joerg Sonnenberger | 4695f91 | 2012-10-16 17:45:27 +0000 | [diff] [blame] | 1147 | |
| 1148 | llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); |
| 1149 | F->setLinkage(llvm::Function::ExternalWeakLinkage); |
| 1150 | WeakRefReferences.insert(F); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1151 | |
| 1152 | return Aliasee; |
| 1153 | } |
| 1154 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1155 | void CodeGenModule::EmitGlobal(GlobalDecl GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 1156 | const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1157 | |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1158 | // Weak references don't produce any output by themselves. |
| 1159 | if (Global->hasAttr<WeakRefAttr>()) |
| 1160 | return; |
| 1161 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 1162 | // If this is an alias definition (which otherwise looks like a declaration) |
| 1163 | // emit it now. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 1164 | if (Global->hasAttr<AliasAttr>()) |
Rafael Espindola | 87017a7 | 2013-10-22 14:23:09 +0000 | [diff] [blame] | 1165 | return EmitAliasDefinition(GD); |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 1166 | |
Peter Collingbourne | d51e43a | 2011-10-06 18:29:46 +0000 | [diff] [blame] | 1167 | // If this is CUDA, be selective about which declarations we emit. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1168 | if (LangOpts.CUDA) { |
Peter Collingbourne | d51e43a | 2011-10-06 18:29:46 +0000 | [diff] [blame] | 1169 | if (CodeGenOpts.CUDAIsDevice) { |
| 1170 | if (!Global->hasAttr<CUDADeviceAttr>() && |
| 1171 | !Global->hasAttr<CUDAGlobalAttr>() && |
| 1172 | !Global->hasAttr<CUDAConstantAttr>() && |
| 1173 | !Global->hasAttr<CUDASharedAttr>()) |
| 1174 | return; |
| 1175 | } else { |
| 1176 | if (!Global->hasAttr<CUDAHostAttr>() && ( |
| 1177 | Global->hasAttr<CUDADeviceAttr>() || |
| 1178 | Global->hasAttr<CUDAConstantAttr>() || |
| 1179 | Global->hasAttr<CUDASharedAttr>())) |
| 1180 | return; |
| 1181 | } |
| 1182 | } |
| 1183 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 1184 | // Ignore declarations, they will be emitted on their first use. |
Daniel Dunbar | 5e1e1f9 | 2009-03-19 08:27:24 +0000 | [diff] [blame] | 1185 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 1186 | // Forward declarations are emitted lazily on first use. |
Nick Lewycky | dce67a7 | 2011-07-18 05:26:13 +0000 | [diff] [blame] | 1187 | if (!FD->doesThisDeclarationHaveABody()) { |
| 1188 | if (!FD->doesDeclarationForceExternallyVisibleDefinition()) |
| 1189 | return; |
| 1190 | |
| 1191 | const FunctionDecl *InlineDefinition = 0; |
| 1192 | FD->getBody(InlineDefinition); |
| 1193 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1194 | StringRef MangledName = getMangledName(GD); |
Benjamin Kramer | 7e42392 | 2012-03-24 18:22:12 +0000 | [diff] [blame] | 1195 | DeferredDecls.erase(MangledName); |
Nick Lewycky | dce67a7 | 2011-07-18 05:26:13 +0000 | [diff] [blame] | 1196 | EmitGlobalDefinition(InlineDefinition); |
Daniel Dunbar | 73241df | 2009-02-13 21:18:01 +0000 | [diff] [blame] | 1197 | return; |
Nick Lewycky | dce67a7 | 2011-07-18 05:26:13 +0000 | [diff] [blame] | 1198 | } |
Daniel Dunbar | 0269871 | 2009-02-13 20:29:50 +0000 | [diff] [blame] | 1199 | } else { |
| 1200 | const VarDecl *VD = cast<VarDecl>(Global); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1201 | assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); |
| 1202 | |
Douglas Gregor | a9a55c0 | 2010-02-06 05:15:45 +0000 | [diff] [blame] | 1203 | if (VD->isThisDeclarationADefinition() != VarDecl::Definition) |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 1204 | return; |
Nate Begeman | 4c13b7a | 2008-04-20 06:29:50 +0000 | [diff] [blame] | 1205 | } |
| 1206 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 1207 | // Defer code generation when possible if this is a static definition, inline |
| 1208 | // function etc. These we only want to emit if they are used. |
Chris Lattner | 4357a82 | 2010-04-13 17:39:09 +0000 | [diff] [blame] | 1209 | if (!MayDeferGeneration(Global)) { |
| 1210 | // Emit the definition if it can't be deferred. |
| 1211 | EmitGlobalDefinition(GD); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1212 | return; |
| 1213 | } |
John McCall | bf40cb5 | 2010-07-15 23:40:35 +0000 | [diff] [blame] | 1214 | |
| 1215 | // If we're deferring emission of a C++ variable with an |
| 1216 | // initializer, remember the order in which it appeared in the file. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1217 | if (getLangOpts().CPlusPlus && isa<VarDecl>(Global) && |
John McCall | bf40cb5 | 2010-07-15 23:40:35 +0000 | [diff] [blame] | 1218 | cast<VarDecl>(Global)->hasInit()) { |
| 1219 | DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); |
| 1220 | CXXGlobalInits.push_back(0); |
| 1221 | } |
Chris Lattner | 4357a82 | 2010-04-13 17:39:09 +0000 | [diff] [blame] | 1222 | |
| 1223 | // If the value has already been used, add it directly to the |
| 1224 | // DeferredDeclsToEmit list. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1225 | StringRef MangledName = getMangledName(GD); |
Chris Lattner | 4357a82 | 2010-04-13 17:39:09 +0000 | [diff] [blame] | 1226 | if (GetGlobalValue(MangledName)) |
| 1227 | DeferredDeclsToEmit.push_back(GD); |
| 1228 | else { |
| 1229 | // Otherwise, remember that we saw a deferred decl with this name. The |
| 1230 | // first use of the mangled name will cause it to move into |
| 1231 | // DeferredDeclsToEmit. |
| 1232 | DeferredDecls[MangledName] = GD; |
| 1233 | } |
Nate Begeman | 4c13b7a | 2008-04-20 06:29:50 +0000 | [diff] [blame] | 1234 | } |
| 1235 | |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 1236 | namespace { |
| 1237 | struct FunctionIsDirectlyRecursive : |
| 1238 | public RecursiveASTVisitor<FunctionIsDirectlyRecursive> { |
| 1239 | const StringRef Name; |
Rafael Espindola | bcf6b98 | 2011-12-19 14:41:01 +0000 | [diff] [blame] | 1240 | const Builtin::Context &BI; |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 1241 | bool Result; |
Rafael Espindola | bcf6b98 | 2011-12-19 14:41:01 +0000 | [diff] [blame] | 1242 | FunctionIsDirectlyRecursive(StringRef N, const Builtin::Context &C) : |
| 1243 | Name(N), BI(C), Result(false) { |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 1244 | } |
| 1245 | typedef RecursiveASTVisitor<FunctionIsDirectlyRecursive> Base; |
| 1246 | |
| 1247 | bool TraverseCallExpr(CallExpr *E) { |
Rafael Espindola | bcf6b98 | 2011-12-19 14:41:01 +0000 | [diff] [blame] | 1248 | const FunctionDecl *FD = E->getDirectCallee(); |
| 1249 | if (!FD) |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 1250 | return true; |
Rafael Espindola | bcf6b98 | 2011-12-19 14:41:01 +0000 | [diff] [blame] | 1251 | AsmLabelAttr *Attr = FD->getAttr<AsmLabelAttr>(); |
| 1252 | if (Attr && Name == Attr->getLabel()) { |
| 1253 | Result = true; |
| 1254 | return false; |
| 1255 | } |
| 1256 | unsigned BuiltinID = FD->getBuiltinID(); |
| 1257 | if (!BuiltinID) |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 1258 | return true; |
Nick Lewycky | f6b5637 | 2012-01-18 03:41:19 +0000 | [diff] [blame] | 1259 | StringRef BuiltinName = BI.GetName(BuiltinID); |
| 1260 | if (BuiltinName.startswith("__builtin_") && |
| 1261 | Name == BuiltinName.slice(strlen("__builtin_"), StringRef::npos)) { |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 1262 | Result = true; |
| 1263 | return false; |
| 1264 | } |
| 1265 | return true; |
| 1266 | } |
| 1267 | }; |
| 1268 | } |
| 1269 | |
Rafael Espindola | bcf6b98 | 2011-12-19 14:41:01 +0000 | [diff] [blame] | 1270 | // isTriviallyRecursive - Check if this function calls another |
| 1271 | // decl that, because of the asm attribute or the other decl being a builtin, |
| 1272 | // ends up pointing to itself. |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 1273 | bool |
Rafael Espindola | bcf6b98 | 2011-12-19 14:41:01 +0000 | [diff] [blame] | 1274 | CodeGenModule::isTriviallyRecursive(const FunctionDecl *FD) { |
| 1275 | StringRef Name; |
| 1276 | if (getCXXABI().getMangleContext().shouldMangleDeclName(FD)) { |
Nick Lewycky | 22afacc | 2012-01-18 01:50:13 +0000 | [diff] [blame] | 1277 | // asm labels are a special kind of mangling we have to support. |
Rafael Espindola | bcf6b98 | 2011-12-19 14:41:01 +0000 | [diff] [blame] | 1278 | AsmLabelAttr *Attr = FD->getAttr<AsmLabelAttr>(); |
| 1279 | if (!Attr) |
| 1280 | return false; |
| 1281 | Name = Attr->getLabel(); |
| 1282 | } else { |
| 1283 | Name = FD->getName(); |
| 1284 | } |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 1285 | |
Rafael Espindola | bcf6b98 | 2011-12-19 14:41:01 +0000 | [diff] [blame] | 1286 | FunctionIsDirectlyRecursive Walker(Name, Context.BuiltinInfo); |
| 1287 | Walker.TraverseFunctionDecl(const_cast<FunctionDecl*>(FD)); |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 1288 | return Walker.Result; |
| 1289 | } |
| 1290 | |
| 1291 | bool |
Peter Collingbourne | 144a31f | 2013-06-05 17:49:37 +0000 | [diff] [blame] | 1292 | CodeGenModule::shouldEmitFunction(GlobalDecl GD) { |
| 1293 | if (getFunctionLinkage(GD) != llvm::Function::AvailableExternallyLinkage) |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 1294 | return true; |
Peter Collingbourne | 144a31f | 2013-06-05 17:49:37 +0000 | [diff] [blame] | 1295 | const FunctionDecl *F = cast<FunctionDecl>(GD.getDecl()); |
Rafael Espindola | cc4889f | 2011-10-28 20:43:56 +0000 | [diff] [blame] | 1296 | if (CodeGenOpts.OptimizationLevel == 0 && |
Michael J. Spencer | adc6cbf | 2012-06-18 07:00:48 +0000 | [diff] [blame] | 1297 | !F->hasAttr<AlwaysInlineAttr>() && !F->hasAttr<ForceInlineAttr>()) |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 1298 | return false; |
| 1299 | // PR9614. Avoid cases where the source code is lying to us. An available |
| 1300 | // externally function should have an equivalent function somewhere else, |
| 1301 | // but a function that calls itself is clearly not equivalent to the real |
| 1302 | // implementation. |
| 1303 | // This happens in glibc's btowc and in some configure checks. |
Rafael Espindola | bcf6b98 | 2011-12-19 14:41:01 +0000 | [diff] [blame] | 1304 | return !isTriviallyRecursive(F); |
Rafael Espindola | a411d2f | 2011-10-26 20:41:06 +0000 | [diff] [blame] | 1305 | } |
| 1306 | |
Adrian Prantl | 0a050f7 | 2013-05-09 23:16:27 +0000 | [diff] [blame] | 1307 | /// If the type for the method's class was generated by |
| 1308 | /// CGDebugInfo::createContextChain(), the cache contains only a |
| 1309 | /// limited DIType without any declarations. Since EmitFunctionStart() |
| 1310 | /// needs to find the canonical declaration for each method, we need |
| 1311 | /// to construct the complete type prior to emitting the method. |
| 1312 | void CodeGenModule::CompleteDIClassType(const CXXMethodDecl* D) { |
| 1313 | if (!D->isInstance()) |
| 1314 | return; |
| 1315 | |
| 1316 | if (CGDebugInfo *DI = getModuleDebugInfo()) |
| 1317 | if (getCodeGenOpts().getDebugInfo() >= CodeGenOptions::LimitedDebugInfo) { |
| 1318 | const PointerType *ThisPtr = |
| 1319 | cast<PointerType>(D->getThisType(getContext())); |
| 1320 | DI->getOrCreateRecordType(ThisPtr->getPointeeType(), D->getLocation()); |
| 1321 | } |
| 1322 | } |
| 1323 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1324 | void CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 1325 | const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1326 | |
Dan Gohman | cb421fa | 2010-04-19 16:39:44 +0000 | [diff] [blame] | 1327 | PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), |
Anders Carlsson | 8e2efcc | 2009-10-27 14:32:27 +0000 | [diff] [blame] | 1328 | Context.getSourceManager(), |
| 1329 | "Generating code for declaration"); |
| 1330 | |
Peter Collingbourne | 144a31f | 2013-06-05 17:49:37 +0000 | [diff] [blame] | 1331 | if (isa<FunctionDecl>(D)) { |
Douglas Gregor | 44eac33 | 2010-07-13 06:02:28 +0000 | [diff] [blame] | 1332 | // At -O0, don't generate IR for functions with available_externally |
| 1333 | // linkage. |
Peter Collingbourne | 144a31f | 2013-06-05 17:49:37 +0000 | [diff] [blame] | 1334 | if (!shouldEmitFunction(GD)) |
Douglas Gregor | 44eac33 | 2010-07-13 06:02:28 +0000 | [diff] [blame] | 1335 | return; |
Anders Carlsson | 7270ee4 | 2010-03-23 04:31:31 +0000 | [diff] [blame] | 1336 | |
Douglas Gregor | 44eac33 | 2010-07-13 06:02:28 +0000 | [diff] [blame] | 1337 | if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { |
Adrian Prantl | 0a050f7 | 2013-05-09 23:16:27 +0000 | [diff] [blame] | 1338 | CompleteDIClassType(Method); |
Eli Friedman | 7dcdf5b | 2011-05-06 17:27:27 +0000 | [diff] [blame] | 1339 | // Make sure to emit the definition(s) before we emit the thunks. |
| 1340 | // This is necessary for the generation of certain thunks. |
| 1341 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) |
| 1342 | EmitCXXConstructor(CD, GD.getCtorType()); |
| 1343 | else if (const CXXDestructorDecl *DD =dyn_cast<CXXDestructorDecl>(Method)) |
| 1344 | EmitCXXDestructor(DD, GD.getDtorType()); |
| 1345 | else |
| 1346 | EmitGlobalFunctionDefinition(GD); |
| 1347 | |
Douglas Gregor | 44eac33 | 2010-07-13 06:02:28 +0000 | [diff] [blame] | 1348 | if (Method->isVirtual()) |
| 1349 | getVTables().EmitThunks(GD); |
| 1350 | |
Eli Friedman | 7dcdf5b | 2011-05-06 17:27:27 +0000 | [diff] [blame] | 1351 | return; |
Douglas Gregor | 44eac33 | 2010-07-13 06:02:28 +0000 | [diff] [blame] | 1352 | } |
Chris Lattner | b5e8156 | 2010-04-13 17:57:11 +0000 | [diff] [blame] | 1353 | |
Chris Lattner | b5e8156 | 2010-04-13 17:57:11 +0000 | [diff] [blame] | 1354 | return EmitGlobalFunctionDefinition(GD); |
Douglas Gregor | 44eac33 | 2010-07-13 06:02:28 +0000 | [diff] [blame] | 1355 | } |
Chris Lattner | b5e8156 | 2010-04-13 17:57:11 +0000 | [diff] [blame] | 1356 | |
| 1357 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) |
| 1358 | return EmitGlobalVarDefinition(VD); |
Chris Lattner | 4357a82 | 2010-04-13 17:39:09 +0000 | [diff] [blame] | 1359 | |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1360 | llvm_unreachable("Invalid argument to EmitGlobalDefinition()"); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1361 | } |
| 1362 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1363 | /// GetOrCreateLLVMFunction - If the specified mangled name is not in the |
| 1364 | /// module, create and return an llvm Function with the specified type. If there |
| 1365 | /// is something in the module with the specified name, return it potentially |
| 1366 | /// bitcasted to the right type. |
| 1367 | /// |
| 1368 | /// If D is non-null, it specifies a decl that correspond to this. This is used |
| 1369 | /// to set the attributes on the function when it is first created. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1370 | llvm::Constant * |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1371 | CodeGenModule::GetOrCreateLLVMFunction(StringRef MangledName, |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1372 | llvm::Type *Ty, |
Reid Kleckner | 73701ea | 2013-07-22 13:07:10 +0000 | [diff] [blame] | 1373 | GlobalDecl GD, bool ForVTable, |
Bill Wendling | c4c62fd | 2013-01-31 00:30:05 +0000 | [diff] [blame] | 1374 | llvm::AttributeSet ExtraAttrs) { |
Reid Kleckner | 73701ea | 2013-07-22 13:07:10 +0000 | [diff] [blame] | 1375 | const Decl *D = GD.getDecl(); |
| 1376 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1377 | // Lookup the entry, lazily creating it if necessary. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1378 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1379 | if (Entry) { |
Benjamin Kramer | d48bcb2 | 2012-08-22 15:37:55 +0000 | [diff] [blame] | 1380 | if (WeakRefReferences.erase(Entry)) { |
Reid Kleckner | 73701ea | 2013-07-22 13:07:10 +0000 | [diff] [blame] | 1381 | const FunctionDecl *FD = cast_or_null<FunctionDecl>(D); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1382 | if (FD && !FD->hasAttr<WeakAttr>()) |
Anders Carlsson | 7270ee4 | 2010-03-23 04:31:31 +0000 | [diff] [blame] | 1383 | Entry->setLinkage(llvm::Function::ExternalLinkage); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1384 | } |
| 1385 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1386 | if (Entry->getType()->getElementType() == Ty) |
| 1387 | return Entry; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1388 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1389 | // Make sure the result is of the correct type. |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 1390 | return llvm::ConstantExpr::getBitCast(Entry, Ty->getPointerTo()); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1391 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1392 | |
Reid Kleckner | a4130ba | 2013-07-22 13:51:44 +0000 | [diff] [blame] | 1393 | // All MSVC dtors other than the base dtor are linkonce_odr and delegate to |
| 1394 | // each other bottoming out with the base dtor. Therefore we emit non-base |
| 1395 | // dtors on usage, even if there is no dtor definition in the TU. |
| 1396 | if (D && isa<CXXDestructorDecl>(D) && |
| 1397 | getCXXABI().useThunkForDtorVariant(cast<CXXDestructorDecl>(D), |
| 1398 | GD.getDtorType())) |
| 1399 | DeferredDeclsToEmit.push_back(GD); |
| 1400 | |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 1401 | // This function doesn't have a complete type (for example, the return |
| 1402 | // type is an incomplete struct). Use a fake type instead, and make |
| 1403 | // sure not to try to set attributes. |
| 1404 | bool IsIncompleteFunction = false; |
John McCall | 784f211 | 2010-04-28 00:00:30 +0000 | [diff] [blame] | 1405 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1406 | llvm::FunctionType *FTy; |
John McCall | 784f211 | 2010-04-28 00:00:30 +0000 | [diff] [blame] | 1407 | if (isa<llvm::FunctionType>(Ty)) { |
| 1408 | FTy = cast<llvm::FunctionType>(Ty); |
| 1409 | } else { |
John McCall | 0774cb8 | 2011-05-15 01:53:33 +0000 | [diff] [blame] | 1410 | FTy = llvm::FunctionType::get(VoidTy, false); |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 1411 | IsIncompleteFunction = true; |
| 1412 | } |
Chris Lattner | bcaedae | 2010-06-30 19:14:05 +0000 | [diff] [blame] | 1413 | |
John McCall | 784f211 | 2010-04-28 00:00:30 +0000 | [diff] [blame] | 1414 | llvm::Function *F = llvm::Function::Create(FTy, |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 1415 | llvm::Function::ExternalLinkage, |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1416 | MangledName, &getModule()); |
| 1417 | assert(F->getName() == MangledName && "name was uniqued!"); |
Reid Kleckner | 73701ea | 2013-07-22 13:07:10 +0000 | [diff] [blame] | 1418 | if (D) |
| 1419 | SetFunctionAttributes(GD, F, IsIncompleteFunction); |
Bill Wendling | c4c62fd | 2013-01-31 00:30:05 +0000 | [diff] [blame] | 1420 | if (ExtraAttrs.hasAttributes(llvm::AttributeSet::FunctionIndex)) { |
| 1421 | llvm::AttrBuilder B(ExtraAttrs, llvm::AttributeSet::FunctionIndex); |
Bill Wendling | 909b6de | 2013-01-23 00:21:06 +0000 | [diff] [blame] | 1422 | F->addAttributes(llvm::AttributeSet::FunctionIndex, |
| 1423 | llvm::AttributeSet::get(VMContext, |
| 1424 | llvm::AttributeSet::FunctionIndex, |
| 1425 | B)); |
| 1426 | } |
Eli Friedman | 654ad40 | 2009-11-09 05:07:37 +0000 | [diff] [blame] | 1427 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 1428 | // This is the first use or definition of a mangled name. If there is a |
| 1429 | // deferred decl with this name, remember that we need to emit it at the end |
| 1430 | // of the file. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1431 | llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 1432 | if (DDI != DeferredDecls.end()) { |
| 1433 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit |
| 1434 | // list, and remove it from DeferredDecls (since we don't need it anymore). |
| 1435 | DeferredDeclsToEmit.push_back(DDI->second); |
| 1436 | DeferredDecls.erase(DDI); |
John McCall | bfdcdc8 | 2010-12-15 04:00:32 +0000 | [diff] [blame] | 1437 | |
Richard Smith | 3cebc73 | 2013-11-05 09:12:18 +0000 | [diff] [blame] | 1438 | // Otherwise, if this is a sized deallocation function, emit a weak definition |
| 1439 | // for it at the end of the translation unit. |
| 1440 | } else if (D && cast<FunctionDecl>(D) |
| 1441 | ->getCorrespondingUnsizedGlobalDeallocationFunction()) { |
| 1442 | DeferredDeclsToEmit.push_back(GD); |
| 1443 | |
John McCall | bfdcdc8 | 2010-12-15 04:00:32 +0000 | [diff] [blame] | 1444 | // Otherwise, there are cases we have to worry about where we're |
| 1445 | // using a declaration for which we must emit a definition but where |
| 1446 | // we might not find a top-level definition: |
| 1447 | // - member functions defined inline in their classes |
| 1448 | // - friend functions defined inline in some class |
| 1449 | // - special member functions with implicit definitions |
| 1450 | // If we ever change our AST traversal to walk into class methods, |
| 1451 | // this will be unnecessary. |
Anders Carlsson | 1faa89f | 2011-02-05 04:35:53 +0000 | [diff] [blame] | 1452 | // |
| 1453 | // We also don't emit a definition for a function if it's going to be an entry |
| 1454 | // in a vtable, unless it's already marked as used. |
Reid Kleckner | 73701ea | 2013-07-22 13:07:10 +0000 | [diff] [blame] | 1455 | } else if (getLangOpts().CPlusPlus && D) { |
John McCall | bfdcdc8 | 2010-12-15 04:00:32 +0000 | [diff] [blame] | 1456 | // Look for a declaration that's lexically in a record. |
Reid Kleckner | 73701ea | 2013-07-22 13:07:10 +0000 | [diff] [blame] | 1457 | const FunctionDecl *FD = cast<FunctionDecl>(D); |
Eli Friedman | b135f0f | 2012-07-02 21:05:30 +0000 | [diff] [blame] | 1458 | FD = FD->getMostRecentDecl(); |
John McCall | bfdcdc8 | 2010-12-15 04:00:32 +0000 | [diff] [blame] | 1459 | do { |
| 1460 | if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { |
Anders Carlsson | 1faa89f | 2011-02-05 04:35:53 +0000 | [diff] [blame] | 1461 | if (FD->isImplicit() && !ForVTable) { |
John McCall | bfdcdc8 | 2010-12-15 04:00:32 +0000 | [diff] [blame] | 1462 | assert(FD->isUsed() && "Sema didn't mark implicit function as used!"); |
Reid Kleckner | 73701ea | 2013-07-22 13:07:10 +0000 | [diff] [blame] | 1463 | DeferredDeclsToEmit.push_back(GD.getWithDecl(FD)); |
John McCall | bfdcdc8 | 2010-12-15 04:00:32 +0000 | [diff] [blame] | 1464 | break; |
Sean Hunt | 10620eb | 2011-05-06 20:44:56 +0000 | [diff] [blame] | 1465 | } else if (FD->doesThisDeclarationHaveABody()) { |
Reid Kleckner | 73701ea | 2013-07-22 13:07:10 +0000 | [diff] [blame] | 1466 | DeferredDeclsToEmit.push_back(GD.getWithDecl(FD)); |
John McCall | bfdcdc8 | 2010-12-15 04:00:32 +0000 | [diff] [blame] | 1467 | break; |
| 1468 | } |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 1469 | } |
Douglas Gregor | ef96ee0 | 2012-01-14 16:38:05 +0000 | [diff] [blame] | 1470 | FD = FD->getPreviousDecl(); |
John McCall | bfdcdc8 | 2010-12-15 04:00:32 +0000 | [diff] [blame] | 1471 | } while (FD); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 1472 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1473 | |
John McCall | 784f211 | 2010-04-28 00:00:30 +0000 | [diff] [blame] | 1474 | // Make sure the result is of the requested type. |
| 1475 | if (!IsIncompleteFunction) { |
| 1476 | assert(F->getType()->getElementType() == Ty); |
| 1477 | return F; |
| 1478 | } |
| 1479 | |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 1480 | llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); |
John McCall | 784f211 | 2010-04-28 00:00:30 +0000 | [diff] [blame] | 1481 | return llvm::ConstantExpr::getBitCast(F, PTy); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1482 | } |
| 1483 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1484 | /// GetAddrOfFunction - Return the address of the given function. If Ty is |
| 1485 | /// non-null, then this function will use the specified type if it has to |
| 1486 | /// create it (this occurs when we see a definition of the function). |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 1487 | llvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1488 | llvm::Type *Ty, |
Anders Carlsson | 1faa89f | 2011-02-05 04:35:53 +0000 | [diff] [blame] | 1489 | bool ForVTable) { |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1490 | // If there was no specific requested type, just convert it now. |
| 1491 | if (!Ty) |
Anders Carlsson | 4a6835e | 2009-09-10 23:38:47 +0000 | [diff] [blame] | 1492 | Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); |
Chris Lattner | bcaedae | 2010-06-30 19:14:05 +0000 | [diff] [blame] | 1493 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1494 | StringRef MangledName = getMangledName(GD); |
Anders Carlsson | 1faa89f | 2011-02-05 04:35:53 +0000 | [diff] [blame] | 1495 | return GetOrCreateLLVMFunction(MangledName, Ty, GD, ForVTable); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1496 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1497 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1498 | /// CreateRuntimeFunction - Create a new runtime function with the specified |
| 1499 | /// type and name. |
| 1500 | llvm::Constant * |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1501 | CodeGenModule::CreateRuntimeFunction(llvm::FunctionType *FTy, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1502 | StringRef Name, |
Bill Wendling | c4c62fd | 2013-01-31 00:30:05 +0000 | [diff] [blame] | 1503 | llvm::AttributeSet ExtraAttrs) { |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1504 | llvm::Constant *C |
| 1505 | = GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false, |
| 1506 | ExtraAttrs); |
| 1507 | if (llvm::Function *F = dyn_cast<llvm::Function>(C)) |
| 1508 | if (F->empty()) |
| 1509 | F->setCallingConv(getRuntimeCC()); |
| 1510 | return C; |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1511 | } |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1512 | |
Richard Smith | a9b21d2 | 2012-02-17 06:48:11 +0000 | [diff] [blame] | 1513 | /// isTypeConstant - Determine whether an object of this type can be emitted |
| 1514 | /// as a constant. |
| 1515 | /// |
| 1516 | /// If ExcludeCtor is true, the duration when the object's constructor runs |
| 1517 | /// will not be considered. The caller will need to verify that the object is |
| 1518 | /// not written to during its construction. |
| 1519 | bool CodeGenModule::isTypeConstant(QualType Ty, bool ExcludeCtor) { |
| 1520 | if (!Ty.isConstant(Context) && !Ty->isReferenceType()) |
Eli Friedman | 20e098b | 2009-12-11 21:23:03 +0000 | [diff] [blame] | 1521 | return false; |
Richard Smith | a9b21d2 | 2012-02-17 06:48:11 +0000 | [diff] [blame] | 1522 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1523 | if (Context.getLangOpts().CPlusPlus) { |
Richard Smith | a9b21d2 | 2012-02-17 06:48:11 +0000 | [diff] [blame] | 1524 | if (const CXXRecordDecl *Record |
| 1525 | = Context.getBaseElementType(Ty)->getAsCXXRecordDecl()) |
| 1526 | return ExcludeCtor && !Record->hasMutableFields() && |
| 1527 | Record->hasTrivialDestructor(); |
Eli Friedman | 20e098b | 2009-12-11 21:23:03 +0000 | [diff] [blame] | 1528 | } |
Richard Smith | a9b21d2 | 2012-02-17 06:48:11 +0000 | [diff] [blame] | 1529 | |
Eli Friedman | 20e098b | 2009-12-11 21:23:03 +0000 | [diff] [blame] | 1530 | return true; |
| 1531 | } |
| 1532 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1533 | /// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, |
| 1534 | /// create and return an llvm GlobalVariable with the specified type. If there |
| 1535 | /// is something in the module with the specified name, return it potentially |
| 1536 | /// bitcasted to the right type. |
| 1537 | /// |
| 1538 | /// If D is non-null, it specifies a decl that correspond to this. This is used |
| 1539 | /// to set the attributes on the global when it is first created. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1540 | llvm::Constant * |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1541 | CodeGenModule::GetOrCreateLLVMGlobal(StringRef MangledName, |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1542 | llvm::PointerType *Ty, |
Rafael Espindola | c532b50 | 2011-01-18 21:07:57 +0000 | [diff] [blame] | 1543 | const VarDecl *D, |
| 1544 | bool UnnamedAddr) { |
Daniel Dunbar | 3c827a7 | 2008-08-05 23:31:02 +0000 | [diff] [blame] | 1545 | // Lookup the entry, lazily creating it if necessary. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1546 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 1547 | if (Entry) { |
Benjamin Kramer | d48bcb2 | 2012-08-22 15:37:55 +0000 | [diff] [blame] | 1548 | if (WeakRefReferences.erase(Entry)) { |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1549 | if (D && !D->hasAttr<WeakAttr>()) |
Anders Carlsson | 7270ee4 | 2010-03-23 04:31:31 +0000 | [diff] [blame] | 1550 | Entry->setLinkage(llvm::Function::ExternalLinkage); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1551 | } |
| 1552 | |
Rafael Espindola | c532b50 | 2011-01-18 21:07:57 +0000 | [diff] [blame] | 1553 | if (UnnamedAddr) |
| 1554 | Entry->setUnnamedAddr(true); |
| 1555 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1556 | if (Entry->getType() == Ty) |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1557 | return Entry; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1558 | |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 1559 | // Make sure the result is of the correct type. |
Matt Arsenault | 54307da | 2013-11-15 02:19:52 +0000 | [diff] [blame^] | 1560 | if (Entry->getType()->getAddressSpace() != Ty->getAddressSpace()) |
| 1561 | return llvm::ConstantExpr::getAddrSpaceCast(Entry, Ty); |
| 1562 | |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1563 | return llvm::ConstantExpr::getBitCast(Entry, Ty); |
Daniel Dunbar | 4998888 | 2009-01-13 02:25:00 +0000 | [diff] [blame] | 1564 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1565 | |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 1566 | // This is the first use or definition of a mangled name. If there is a |
| 1567 | // deferred decl with this name, remember that we need to emit it at the end |
| 1568 | // of the file. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1569 | llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); |
Chris Lattner | 67b0052 | 2009-03-21 09:44:56 +0000 | [diff] [blame] | 1570 | if (DDI != DeferredDecls.end()) { |
| 1571 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit |
| 1572 | // list, and remove it from DeferredDecls (since we don't need it anymore). |
| 1573 | DeferredDeclsToEmit.push_back(DDI->second); |
| 1574 | DeferredDecls.erase(DDI); |
| 1575 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1576 | |
Peter Collingbourne | 4dc34eb | 2012-05-20 21:08:35 +0000 | [diff] [blame] | 1577 | unsigned AddrSpace = GetGlobalVarAddressSpace(D, Ty->getAddressSpace()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1578 | llvm::GlobalVariable *GV = |
| 1579 | new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 1580 | llvm::GlobalValue::ExternalLinkage, |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1581 | 0, MangledName, 0, |
Hans Wennborg | 5e2d5de | 2012-06-23 11:51:46 +0000 | [diff] [blame] | 1582 | llvm::GlobalVariable::NotThreadLocal, AddrSpace); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 1583 | |
| 1584 | // Handle things which are present even on external declarations. |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1585 | if (D) { |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 1586 | // FIXME: This code is overly simple and should be merged with other global |
| 1587 | // handling. |
Richard Smith | a9b21d2 | 2012-02-17 06:48:11 +0000 | [diff] [blame] | 1588 | GV->setConstant(isTypeConstant(D->getType(), false)); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 1589 | |
John McCall | 110e8e5 | 2010-10-29 22:22:43 +0000 | [diff] [blame] | 1590 | // Set linkage and visibility in case we never see a definition. |
Rafael Espindola | 2beda12 | 2013-02-27 02:15:29 +0000 | [diff] [blame] | 1591 | LinkageInfo LV = D->getLinkageAndVisibility(); |
Rafael Espindola | f127eb8 | 2013-02-27 02:56:45 +0000 | [diff] [blame] | 1592 | if (LV.getLinkage() != ExternalLinkage) { |
John McCall | 15e310a | 2011-02-19 02:53:41 +0000 | [diff] [blame] | 1593 | // Don't set internal linkage on declarations. |
John McCall | 110e8e5 | 2010-10-29 22:22:43 +0000 | [diff] [blame] | 1594 | } else { |
| 1595 | if (D->hasAttr<DLLImportAttr>()) |
| 1596 | GV->setLinkage(llvm::GlobalValue::DLLImportLinkage); |
Douglas Gregor | 0a0d2b1 | 2011-03-23 00:50:03 +0000 | [diff] [blame] | 1597 | else if (D->hasAttr<WeakAttr>() || D->isWeakImported()) |
John McCall | 110e8e5 | 2010-10-29 22:22:43 +0000 | [diff] [blame] | 1598 | GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); |
Chris Lattner | 99b5361 | 2009-03-21 08:03:33 +0000 | [diff] [blame] | 1599 | |
John McCall | af14603 | 2010-10-30 11:50:40 +0000 | [diff] [blame] | 1600 | // Set visibility on a declaration only if it's explicit. |
Rafael Espindola | f127eb8 | 2013-02-27 02:56:45 +0000 | [diff] [blame] | 1601 | if (LV.isVisibilityExplicit()) |
| 1602 | GV->setVisibility(GetLLVMVisibility(LV.getVisibility())); |
John McCall | 110e8e5 | 2010-10-29 22:22:43 +0000 | [diff] [blame] | 1603 | } |
Eli Friedman | 56ebe50 | 2009-04-19 21:05:03 +0000 | [diff] [blame] | 1604 | |
Richard Smith | b80a16e | 2013-04-19 16:42:07 +0000 | [diff] [blame] | 1605 | if (D->getTLSKind()) { |
Richard Smith | db4f61f | 2013-04-22 08:06:17 +0000 | [diff] [blame] | 1606 | if (D->getTLSKind() == VarDecl::TLS_Dynamic) |
| 1607 | CXXThreadLocals.push_back(std::make_pair(D, GV)); |
Hans Wennborg | de981f3 | 2012-06-28 08:01:44 +0000 | [diff] [blame] | 1608 | setTLSMode(GV, *D); |
Richard Smith | b80a16e | 2013-04-19 16:42:07 +0000 | [diff] [blame] | 1609 | } |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1610 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1611 | |
Peter Collingbourne | 4dc34eb | 2012-05-20 21:08:35 +0000 | [diff] [blame] | 1612 | if (AddrSpace != Ty->getAddressSpace()) |
Matt Arsenault | 54307da | 2013-11-15 02:19:52 +0000 | [diff] [blame^] | 1613 | return llvm::ConstantExpr::getAddrSpaceCast(GV, Ty); |
| 1614 | |
| 1615 | return GV; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1616 | } |
| 1617 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1618 | |
Anders Carlsson | 3bd6202 | 2011-01-29 18:20:20 +0000 | [diff] [blame] | 1619 | llvm::GlobalVariable * |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1620 | CodeGenModule::CreateOrReplaceCXXRuntimeVariable(StringRef Name, |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1621 | llvm::Type *Ty, |
Anders Carlsson | 3bd6202 | 2011-01-29 18:20:20 +0000 | [diff] [blame] | 1622 | llvm::GlobalValue::LinkageTypes Linkage) { |
| 1623 | llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name); |
| 1624 | llvm::GlobalVariable *OldGV = 0; |
| 1625 | |
| 1626 | |
| 1627 | if (GV) { |
| 1628 | // Check if the variable has the right type. |
| 1629 | if (GV->getType()->getElementType() == Ty) |
| 1630 | return GV; |
| 1631 | |
| 1632 | // Because C++ name mangling, the only way we can end up with an already |
| 1633 | // existing global with the same name is if it has been declared extern "C". |
Nico Weber | c5f8046 | 2012-10-11 10:13:44 +0000 | [diff] [blame] | 1634 | assert(GV->isDeclaration() && "Declaration has wrong type!"); |
Anders Carlsson | 3bd6202 | 2011-01-29 18:20:20 +0000 | [diff] [blame] | 1635 | OldGV = GV; |
| 1636 | } |
| 1637 | |
| 1638 | // Create a new variable. |
| 1639 | GV = new llvm::GlobalVariable(getModule(), Ty, /*isConstant=*/true, |
| 1640 | Linkage, 0, Name); |
| 1641 | |
| 1642 | if (OldGV) { |
| 1643 | // Replace occurrences of the old variable if needed. |
| 1644 | GV->takeName(OldGV); |
| 1645 | |
| 1646 | if (!OldGV->use_empty()) { |
| 1647 | llvm::Constant *NewPtrForOldDecl = |
| 1648 | llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); |
| 1649 | OldGV->replaceAllUsesWith(NewPtrForOldDecl); |
| 1650 | } |
| 1651 | |
| 1652 | OldGV->eraseFromParent(); |
| 1653 | } |
| 1654 | |
| 1655 | return GV; |
| 1656 | } |
| 1657 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1658 | /// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the |
| 1659 | /// given global variable. If Ty is non-null and if the global doesn't exist, |
Eric Christopher | 0ff258b | 2012-04-16 23:55:04 +0000 | [diff] [blame] | 1660 | /// then it will be created with the specified type instead of whatever the |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1661 | /// normal requested type would be. |
| 1662 | llvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1663 | llvm::Type *Ty) { |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1664 | assert(D->hasGlobalStorage() && "Not a global variable"); |
| 1665 | QualType ASTTy = D->getType(); |
| 1666 | if (Ty == 0) |
| 1667 | Ty = getTypes().ConvertTypeForMem(ASTTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1668 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1669 | llvm::PointerType *PTy = |
Peter Collingbourne | 207f4d8 | 2011-03-18 22:38:29 +0000 | [diff] [blame] | 1670 | llvm::PointerType::get(Ty, getContext().getTargetAddressSpace(ASTTy)); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1671 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1672 | StringRef MangledName = getMangledName(D); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1673 | return GetOrCreateLLVMGlobal(MangledName, PTy, D); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1674 | } |
| 1675 | |
| 1676 | /// CreateRuntimeVariable - Create a new runtime global variable with the |
| 1677 | /// specified type and name. |
| 1678 | llvm::Constant * |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1679 | CodeGenModule::CreateRuntimeVariable(llvm::Type *Ty, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1680 | StringRef Name) { |
John McCall | 1de4d4e | 2011-04-07 08:22:57 +0000 | [diff] [blame] | 1681 | return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0, |
Rafael Espindola | c532b50 | 2011-01-18 21:07:57 +0000 | [diff] [blame] | 1682 | true); |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1683 | } |
| 1684 | |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 1685 | void CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { |
| 1686 | assert(!D->getInit() && "Cannot emit definite definitions here!"); |
| 1687 | |
Douglas Gregor | 7520bd1 | 2009-04-21 19:28:58 +0000 | [diff] [blame] | 1688 | if (MayDeferGeneration(D)) { |
| 1689 | // If we have not seen a reference to this variable yet, place it |
| 1690 | // into the deferred declarations table to be emitted if needed |
| 1691 | // later. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1692 | StringRef MangledName = getMangledName(D); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1693 | if (!GetGlobalValue(MangledName)) { |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 1694 | DeferredDecls[MangledName] = D; |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 1695 | return; |
Douglas Gregor | 7520bd1 | 2009-04-21 19:28:58 +0000 | [diff] [blame] | 1696 | } |
| 1697 | } |
| 1698 | |
| 1699 | // The tentative definition is the only definition. |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 1700 | EmitGlobalVarDefinition(D); |
| 1701 | } |
| 1702 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1703 | CharUnits CodeGenModule::GetTargetTypeStoreSize(llvm::Type *Ty) const { |
Ken Dyck | 06f486e | 2011-01-18 02:01:14 +0000 | [diff] [blame] | 1704 | return Context.toCharUnitsFromBits( |
Micah Villmow | 25a6a84 | 2012-10-08 16:25:52 +0000 | [diff] [blame] | 1705 | TheDataLayout.getTypeStoreSizeInBits(Ty)); |
Ken Dyck | 687cc4a | 2010-01-26 13:48:07 +0000 | [diff] [blame] | 1706 | } |
| 1707 | |
Peter Collingbourne | 4dc34eb | 2012-05-20 21:08:35 +0000 | [diff] [blame] | 1708 | unsigned CodeGenModule::GetGlobalVarAddressSpace(const VarDecl *D, |
| 1709 | unsigned AddrSpace) { |
| 1710 | if (LangOpts.CUDA && CodeGenOpts.CUDAIsDevice) { |
| 1711 | if (D->hasAttr<CUDAConstantAttr>()) |
| 1712 | AddrSpace = getContext().getTargetAddressSpace(LangAS::cuda_constant); |
| 1713 | else if (D->hasAttr<CUDASharedAttr>()) |
| 1714 | AddrSpace = getContext().getTargetAddressSpace(LangAS::cuda_shared); |
| 1715 | else |
| 1716 | AddrSpace = getContext().getTargetAddressSpace(LangAS::cuda_device); |
| 1717 | } |
| 1718 | |
| 1719 | return AddrSpace; |
| 1720 | } |
| 1721 | |
Richard Smith | 0024937 | 2013-04-06 05:00:46 +0000 | [diff] [blame] | 1722 | template<typename SomeDecl> |
| 1723 | void CodeGenModule::MaybeHandleStaticInExternC(const SomeDecl *D, |
| 1724 | llvm::GlobalValue *GV) { |
| 1725 | if (!getLangOpts().CPlusPlus) |
| 1726 | return; |
| 1727 | |
| 1728 | // Must have 'used' attribute, or else inline assembly can't rely on |
| 1729 | // the name existing. |
| 1730 | if (!D->template hasAttr<UsedAttr>()) |
| 1731 | return; |
| 1732 | |
| 1733 | // Must have internal linkage and an ordinary name. |
Rafael Espindola | 181e3ec | 2013-05-13 00:12:11 +0000 | [diff] [blame] | 1734 | if (!D->getIdentifier() || D->getFormalLinkage() != InternalLinkage) |
Richard Smith | 0024937 | 2013-04-06 05:00:46 +0000 | [diff] [blame] | 1735 | return; |
| 1736 | |
| 1737 | // Must be in an extern "C" context. Entities declared directly within |
| 1738 | // a record are not extern "C" even if the record is in such a context. |
Rafael Espindola | bc65091 | 2013-10-17 15:37:26 +0000 | [diff] [blame] | 1739 | const SomeDecl *First = D->getFirstDecl(); |
Rafael Espindola | d8ffd0b | 2013-05-05 20:15:21 +0000 | [diff] [blame] | 1740 | if (First->getDeclContext()->isRecord() || !First->isInExternCContext()) |
Richard Smith | 0024937 | 2013-04-06 05:00:46 +0000 | [diff] [blame] | 1741 | return; |
| 1742 | |
| 1743 | // OK, this is an internal linkage entity inside an extern "C" linkage |
| 1744 | // specification. Make a note of that so we can give it the "expected" |
| 1745 | // mangled name if nothing else is using that name. |
Richard Smith | 6797204 | 2013-04-06 07:07:44 +0000 | [diff] [blame] | 1746 | std::pair<StaticExternCMap::iterator, bool> R = |
| 1747 | StaticExternCValues.insert(std::make_pair(D->getIdentifier(), GV)); |
Richard Smith | 0024937 | 2013-04-06 05:00:46 +0000 | [diff] [blame] | 1748 | |
| 1749 | // If we have multiple internal linkage entities with the same name |
| 1750 | // in extern "C" regions, none of them gets that name. |
Richard Smith | 6797204 | 2013-04-06 07:07:44 +0000 | [diff] [blame] | 1751 | if (!R.second) |
| 1752 | R.first->second = 0; |
Richard Smith | 0024937 | 2013-04-06 05:00:46 +0000 | [diff] [blame] | 1753 | } |
| 1754 | |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 1755 | void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { |
Chris Lattner | 8f32f71 | 2007-07-14 00:23:28 +0000 | [diff] [blame] | 1756 | llvm::Constant *Init = 0; |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1757 | QualType ASTTy = D->getType(); |
Richard Smith | 7ca4850 | 2012-02-13 22:16:19 +0000 | [diff] [blame] | 1758 | CXXRecordDecl *RD = ASTTy->getBaseElementTypeUnsafe()->getAsCXXRecordDecl(); |
| 1759 | bool NeedsGlobalCtor = false; |
| 1760 | bool NeedsGlobalDtor = RD && !RD->hasTrivialDestructor(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1761 | |
Richard Smith | 2d6a567 | 2012-01-14 04:30:29 +0000 | [diff] [blame] | 1762 | const VarDecl *InitDecl; |
| 1763 | const Expr *InitExpr = D->getAnyInitializer(InitDecl); |
Sebastian Redl | 19b1a6e | 2012-02-25 20:51:20 +0000 | [diff] [blame] | 1764 | |
Anders Carlsson | 3bb9269 | 2010-01-26 17:43:42 +0000 | [diff] [blame] | 1765 | if (!InitExpr) { |
Eli Friedman | cd5f4aa | 2008-05-30 20:39:54 +0000 | [diff] [blame] | 1766 | // This is a tentative definition; tentative definitions are |
Daniel Dunbar | 03f5ad9 | 2009-04-15 22:08:45 +0000 | [diff] [blame] | 1767 | // implicitly initialized with { 0 }. |
| 1768 | // |
| 1769 | // Note that tentative definitions are only emitted at the end of |
| 1770 | // a translation unit, so they should never have incomplete |
| 1771 | // type. In addition, EmitTentativeDefinition makes sure that we |
| 1772 | // never attempt to emit a tentative definition if a real one |
| 1773 | // exists. A use may still exists, however, so we still may need |
| 1774 | // to do a RAUW. |
| 1775 | assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); |
Anders Carlsson | b0d0ea0 | 2009-08-02 21:18:22 +0000 | [diff] [blame] | 1776 | Init = EmitNullConstant(D->getType()); |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1777 | } else { |
Richard Smith | 7c3e615 | 2013-06-12 22:31:48 +0000 | [diff] [blame] | 1778 | initializedGlobalDecl = GlobalDecl(D); |
| 1779 | Init = EmitConstantInit(*InitDecl); |
Sebastian Redl | 19b1a6e | 2012-02-25 20:51:20 +0000 | [diff] [blame] | 1780 | |
Fariborz Jahanian | 4904bf4 | 2012-06-26 16:06:38 +0000 | [diff] [blame] | 1781 | if (!Init) { |
Anders Carlsson | 3bb9269 | 2010-01-26 17:43:42 +0000 | [diff] [blame] | 1782 | QualType T = InitExpr->getType(); |
Douglas Gregor | c446d18 | 2010-05-05 20:15:55 +0000 | [diff] [blame] | 1783 | if (D->getType()->isReferenceType()) |
| 1784 | T = D->getType(); |
Richard Smith | 2d6a567 | 2012-01-14 04:30:29 +0000 | [diff] [blame] | 1785 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1786 | if (getLangOpts().CPlusPlus) { |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 1787 | Init = EmitNullConstant(T); |
Richard Smith | 7ca4850 | 2012-02-13 22:16:19 +0000 | [diff] [blame] | 1788 | NeedsGlobalCtor = true; |
Anders Carlsson | 89ed31d | 2009-08-08 23:24:23 +0000 | [diff] [blame] | 1789 | } else { |
| 1790 | ErrorUnsupported(D, "static initializer"); |
| 1791 | Init = llvm::UndefValue::get(getTypes().ConvertType(T)); |
| 1792 | } |
John McCall | bf40cb5 | 2010-07-15 23:40:35 +0000 | [diff] [blame] | 1793 | } else { |
| 1794 | // We don't need an initializer, so remove the entry for the delayed |
Richard Smith | 7ca4850 | 2012-02-13 22:16:19 +0000 | [diff] [blame] | 1795 | // initializer position (just in case this entry was delayed) if we |
| 1796 | // also don't need to register a destructor. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1797 | if (getLangOpts().CPlusPlus && !NeedsGlobalDtor) |
John McCall | bf40cb5 | 2010-07-15 23:40:35 +0000 | [diff] [blame] | 1798 | DelayedCXXInitPosition.erase(D); |
Eli Friedman | 6e656f4 | 2009-02-20 01:18:21 +0000 | [diff] [blame] | 1799 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1800 | } |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1801 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1802 | llvm::Type* InitType = Init->getType(); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1803 | llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1804 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1805 | // Strip off a bitcast if we got one back. |
| 1806 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1807 | assert(CE->getOpcode() == llvm::Instruction::BitCast || |
Matt Arsenault | 54307da | 2013-11-15 02:19:52 +0000 | [diff] [blame^] | 1808 | CE->getOpcode() == llvm::Instruction::AddrSpaceCast || |
| 1809 | // All zero index gep. |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 1810 | CE->getOpcode() == llvm::Instruction::GetElementPtr); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1811 | Entry = CE->getOperand(0); |
| 1812 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1813 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1814 | // Entry is now either a Function or GlobalVariable. |
| 1815 | llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1816 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1817 | // We have a definition after a declaration with the wrong type. |
| 1818 | // We must make a new GlobalVariable* and update everything that used OldGV |
| 1819 | // (a declaration or tentative definition) with the new GlobalVariable* |
| 1820 | // (which will be a definition). |
| 1821 | // |
| 1822 | // This happens if there is a prototype for a global (e.g. |
| 1823 | // "extern int x[];") and then a definition of a different type (e.g. |
| 1824 | // "int x[10];"). This also happens when an initializer has a different type |
| 1825 | // from the type of the global (this happens with unions). |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1826 | if (GV == 0 || |
| 1827 | GV->getType()->getElementType() != InitType || |
Peter Collingbourne | 207f4d8 | 2011-03-18 22:38:29 +0000 | [diff] [blame] | 1828 | GV->getType()->getAddressSpace() != |
Peter Collingbourne | 4dc34eb | 2012-05-20 21:08:35 +0000 | [diff] [blame] | 1829 | GetGlobalVarAddressSpace(D, getContext().getTargetAddressSpace(ASTTy))) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1830 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 1831 | // Move the old entry aside so that we'll create a new one. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1832 | Entry->setName(StringRef()); |
Daniel Dunbar | 232350d | 2009-02-19 05:36:41 +0000 | [diff] [blame] | 1833 | |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1834 | // Make a new global with the correct type, this is now guaranteed to work. |
| 1835 | GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 1836 | |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1837 | // Replace all uses of the old global with the new global |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1838 | llvm::Constant *NewPtrForOldDecl = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 1839 | llvm::ConstantExpr::getBitCast(GV, Entry->getType()); |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1840 | Entry->replaceAllUsesWith(NewPtrForOldDecl); |
Eli Friedman | 77ba708 | 2008-05-30 19:50:47 +0000 | [diff] [blame] | 1841 | |
| 1842 | // Erase the old global, since it is no longer used. |
Chris Lattner | 570585c | 2009-03-21 09:16:30 +0000 | [diff] [blame] | 1843 | cast<llvm::GlobalValue>(Entry)->eraseFromParent(); |
Chris Lattner | 8f32f71 | 2007-07-14 00:23:28 +0000 | [diff] [blame] | 1844 | } |
Devang Patel | 8e53e72 | 2007-10-26 16:31:40 +0000 | [diff] [blame] | 1845 | |
Richard Smith | 0024937 | 2013-04-06 05:00:46 +0000 | [diff] [blame] | 1846 | MaybeHandleStaticInExternC(D, GV); |
| 1847 | |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1848 | if (D->hasAttr<AnnotateAttr>()) |
| 1849 | AddGlobalAnnotations(D, GV); |
Nate Begeman | 8bd4afe | 2008-04-19 04:17:09 +0000 | [diff] [blame] | 1850 | |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1851 | GV->setInitializer(Init); |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1852 | |
| 1853 | // If it is safe to mark the global 'constant', do so now. |
Richard Smith | a9b21d2 | 2012-02-17 06:48:11 +0000 | [diff] [blame] | 1854 | GV->setConstant(!NeedsGlobalCtor && !NeedsGlobalDtor && |
| 1855 | isTypeConstant(D->getType(), true)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1856 | |
Ken Dyck | 8b752f1 | 2010-01-27 17:10:57 +0000 | [diff] [blame] | 1857 | GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); |
Richard Smith | a9b21d2 | 2012-02-17 06:48:11 +0000 | [diff] [blame] | 1858 | |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1859 | // Set the llvm linkage type as appropriate. |
Fariborz Jahanian | 354e712 | 2010-10-27 16:21:54 +0000 | [diff] [blame] | 1860 | llvm::GlobalValue::LinkageTypes Linkage = |
Eli Friedman | 07369dd | 2013-07-01 20:22:57 +0000 | [diff] [blame] | 1861 | GetLLVMLinkageVarDefinition(D, GV->isConstant()); |
Fariborz Jahanian | 354e712 | 2010-10-27 16:21:54 +0000 | [diff] [blame] | 1862 | GV->setLinkage(Linkage); |
| 1863 | if (Linkage == llvm::GlobalVariable::CommonLinkage) |
Chris Lattner | e78b86f | 2009-08-05 05:20:29 +0000 | [diff] [blame] | 1864 | // common vars aren't constant even if declared const. |
| 1865 | GV->setConstant(false); |
Daniel Dunbar | 7e714cd | 2009-04-10 20:26:50 +0000 | [diff] [blame] | 1866 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 1867 | SetCommonAttributes(D, GV); |
Daniel Dunbar | 04d4078 | 2009-04-14 06:00:08 +0000 | [diff] [blame] | 1868 | |
John McCall | 3030eb8 | 2010-11-06 09:44:32 +0000 | [diff] [blame] | 1869 | // Emit the initializer function if necessary. |
Richard Smith | 7ca4850 | 2012-02-13 22:16:19 +0000 | [diff] [blame] | 1870 | if (NeedsGlobalCtor || NeedsGlobalDtor) |
| 1871 | EmitCXXGlobalVarDeclInitFunc(D, GV, NeedsGlobalCtor); |
John McCall | 3030eb8 | 2010-11-06 09:44:32 +0000 | [diff] [blame] | 1872 | |
Kostya Serebryany | 05c5ebc | 2012-08-21 06:53:28 +0000 | [diff] [blame] | 1873 | // If we are compiling with ASan, add metadata indicating dynamically |
| 1874 | // initialized globals. |
Will Dietz | 4f45bc0 | 2013-01-18 11:30:38 +0000 | [diff] [blame] | 1875 | if (SanOpts.Address && NeedsGlobalCtor) { |
Kostya Serebryany | 05c5ebc | 2012-08-21 06:53:28 +0000 | [diff] [blame] | 1876 | llvm::Module &M = getModule(); |
| 1877 | |
| 1878 | llvm::NamedMDNode *DynamicInitializers = |
| 1879 | M.getOrInsertNamedMetadata("llvm.asan.dynamically_initialized_globals"); |
| 1880 | llvm::Value *GlobalToAdd[] = { GV }; |
| 1881 | llvm::MDNode *ThisGlobal = llvm::MDNode::get(VMContext, GlobalToAdd); |
| 1882 | DynamicInitializers->addOperand(ThisGlobal); |
| 1883 | } |
| 1884 | |
Sanjiv Gupta | 686226b | 2008-06-05 08:59:10 +0000 | [diff] [blame] | 1885 | // Emit global variable debug information. |
Eric Christopher | 73fb350 | 2011-10-13 21:45:18 +0000 | [diff] [blame] | 1886 | if (CGDebugInfo *DI = getModuleDebugInfo()) |
Douglas Gregor | 4cdad31 | 2012-10-23 20:05:01 +0000 | [diff] [blame] | 1887 | if (getCodeGenOpts().getDebugInfo() >= CodeGenOptions::LimitedDebugInfo) |
Alexey Samsonov | fd00eec | 2012-05-04 07:39:27 +0000 | [diff] [blame] | 1888 | DI->EmitGlobalVariable(GV, D); |
Chris Lattner | 88a69ad | 2007-07-13 05:13:43 +0000 | [diff] [blame] | 1889 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1890 | |
Fariborz Jahanian | 354e712 | 2010-10-27 16:21:54 +0000 | [diff] [blame] | 1891 | llvm::GlobalValue::LinkageTypes |
Eli Friedman | 07369dd | 2013-07-01 20:22:57 +0000 | [diff] [blame] | 1892 | CodeGenModule::GetLLVMLinkageVarDefinition(const VarDecl *D, bool isConstant) { |
Fariborz Jahanian | 354e712 | 2010-10-27 16:21:54 +0000 | [diff] [blame] | 1893 | GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); |
| 1894 | if (Linkage == GVA_Internal) |
| 1895 | return llvm::Function::InternalLinkage; |
| 1896 | else if (D->hasAttr<DLLImportAttr>()) |
| 1897 | return llvm::Function::DLLImportLinkage; |
| 1898 | else if (D->hasAttr<DLLExportAttr>()) |
| 1899 | return llvm::Function::DLLExportLinkage; |
Reid Kleckner | a722534 | 2013-05-20 14:02:37 +0000 | [diff] [blame] | 1900 | else if (D->hasAttr<SelectAnyAttr>()) { |
| 1901 | // selectany symbols are externally visible, so use weak instead of |
| 1902 | // linkonce. MSVC optimizes away references to const selectany globals, so |
| 1903 | // all definitions should be the same and ODR linkage should be used. |
| 1904 | // http://msdn.microsoft.com/en-us/library/5tkz6s71.aspx |
| 1905 | return llvm::GlobalVariable::WeakODRLinkage; |
| 1906 | } else if (D->hasAttr<WeakAttr>()) { |
Eli Friedman | 07369dd | 2013-07-01 20:22:57 +0000 | [diff] [blame] | 1907 | if (isConstant) |
Fariborz Jahanian | 354e712 | 2010-10-27 16:21:54 +0000 | [diff] [blame] | 1908 | return llvm::GlobalVariable::WeakODRLinkage; |
| 1909 | else |
| 1910 | return llvm::GlobalVariable::WeakAnyLinkage; |
| 1911 | } else if (Linkage == GVA_TemplateInstantiation || |
| 1912 | Linkage == GVA_ExplicitTemplateInstantiation) |
John McCall | 99ace16 | 2011-04-12 01:46:54 +0000 | [diff] [blame] | 1913 | return llvm::GlobalVariable::WeakODRLinkage; |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1914 | else if (!getLangOpts().CPlusPlus && |
Eric Christopher | a6cf1e7 | 2010-12-02 02:45:55 +0000 | [diff] [blame] | 1915 | ((!CodeGenOpts.NoCommon && !D->getAttr<NoCommonAttr>()) || |
| 1916 | D->getAttr<CommonAttr>()) && |
Fariborz Jahanian | 354e712 | 2010-10-27 16:21:54 +0000 | [diff] [blame] | 1917 | !D->hasExternalStorage() && !D->getInit() && |
Richard Smith | 38afbc7 | 2013-04-13 02:43:54 +0000 | [diff] [blame] | 1918 | !D->getAttr<SectionAttr>() && !D->getTLSKind() && |
Fariborz Jahanian | ab27d6e | 2011-06-20 17:50:03 +0000 | [diff] [blame] | 1919 | !D->getAttr<WeakImportAttr>()) { |
Fariborz Jahanian | 354e712 | 2010-10-27 16:21:54 +0000 | [diff] [blame] | 1920 | // Thread local vars aren't considered common linkage. |
| 1921 | return llvm::GlobalVariable::CommonLinkage; |
Bill Wendling | 4e3b54b | 2013-05-02 19:18:03 +0000 | [diff] [blame] | 1922 | } else if (D->getTLSKind() == VarDecl::TLS_Dynamic && |
| 1923 | getTarget().getTriple().isMacOSX()) |
| 1924 | // On Darwin, the backing variable for a C++11 thread_local variable always |
| 1925 | // has internal linkage; all accesses should just be calls to the |
| 1926 | // Itanium-specified entry point, which has the normal linkage of the |
| 1927 | // variable. |
| 1928 | return llvm::GlobalValue::InternalLinkage; |
Fariborz Jahanian | 354e712 | 2010-10-27 16:21:54 +0000 | [diff] [blame] | 1929 | return llvm::GlobalVariable::ExternalLinkage; |
| 1930 | } |
| 1931 | |
John McCall | a923c97 | 2012-12-12 22:21:47 +0000 | [diff] [blame] | 1932 | /// Replace the uses of a function that was declared with a non-proto type. |
| 1933 | /// We want to silently drop extra arguments from call sites |
| 1934 | static void replaceUsesOfNonProtoConstant(llvm::Constant *old, |
| 1935 | llvm::Function *newFn) { |
| 1936 | // Fast path. |
| 1937 | if (old->use_empty()) return; |
| 1938 | |
| 1939 | llvm::Type *newRetTy = newFn->getReturnType(); |
| 1940 | SmallVector<llvm::Value*, 4> newArgs; |
| 1941 | |
| 1942 | for (llvm::Value::use_iterator ui = old->use_begin(), ue = old->use_end(); |
| 1943 | ui != ue; ) { |
| 1944 | llvm::Value::use_iterator use = ui++; // Increment before the use is erased. |
| 1945 | llvm::User *user = *use; |
| 1946 | |
| 1947 | // Recognize and replace uses of bitcasts. Most calls to |
| 1948 | // unprototyped functions will use bitcasts. |
| 1949 | if (llvm::ConstantExpr *bitcast = dyn_cast<llvm::ConstantExpr>(user)) { |
| 1950 | if (bitcast->getOpcode() == llvm::Instruction::BitCast) |
| 1951 | replaceUsesOfNonProtoConstant(bitcast, newFn); |
| 1952 | continue; |
| 1953 | } |
| 1954 | |
| 1955 | // Recognize calls to the function. |
| 1956 | llvm::CallSite callSite(user); |
| 1957 | if (!callSite) continue; |
| 1958 | if (!callSite.isCallee(use)) continue; |
| 1959 | |
| 1960 | // If the return types don't match exactly, then we can't |
| 1961 | // transform this call unless it's dead. |
| 1962 | if (callSite->getType() != newRetTy && !callSite->use_empty()) |
| 1963 | continue; |
| 1964 | |
| 1965 | // Get the call site's attribute list. |
Bill Wendling | b263bdf | 2013-01-27 02:46:53 +0000 | [diff] [blame] | 1966 | SmallVector<llvm::AttributeSet, 8> newAttrs; |
John McCall | a923c97 | 2012-12-12 22:21:47 +0000 | [diff] [blame] | 1967 | llvm::AttributeSet oldAttrs = callSite.getAttributes(); |
| 1968 | |
| 1969 | // Collect any return attributes from the call. |
Bill Wendling | a37ce61 | 2013-01-21 21:57:40 +0000 | [diff] [blame] | 1970 | if (oldAttrs.hasAttributes(llvm::AttributeSet::ReturnIndex)) |
Bill Wendling | ed01f84 | 2013-01-21 22:45:00 +0000 | [diff] [blame] | 1971 | newAttrs.push_back( |
Bill Wendling | b263bdf | 2013-01-27 02:46:53 +0000 | [diff] [blame] | 1972 | llvm::AttributeSet::get(newFn->getContext(), |
| 1973 | oldAttrs.getRetAttributes())); |
John McCall | a923c97 | 2012-12-12 22:21:47 +0000 | [diff] [blame] | 1974 | |
| 1975 | // If the function was passed too few arguments, don't transform. |
| 1976 | unsigned newNumArgs = newFn->arg_size(); |
| 1977 | if (callSite.arg_size() < newNumArgs) continue; |
| 1978 | |
| 1979 | // If extra arguments were passed, we silently drop them. |
| 1980 | // If any of the types mismatch, we don't transform. |
| 1981 | unsigned argNo = 0; |
| 1982 | bool dontTransform = false; |
| 1983 | for (llvm::Function::arg_iterator ai = newFn->arg_begin(), |
| 1984 | ae = newFn->arg_end(); ai != ae; ++ai, ++argNo) { |
| 1985 | if (callSite.getArgument(argNo)->getType() != ai->getType()) { |
| 1986 | dontTransform = true; |
| 1987 | break; |
| 1988 | } |
| 1989 | |
| 1990 | // Add any parameter attributes. |
Bill Wendling | 89530e4 | 2013-01-23 06:15:10 +0000 | [diff] [blame] | 1991 | if (oldAttrs.hasAttributes(argNo + 1)) |
| 1992 | newAttrs. |
Bill Wendling | b263bdf | 2013-01-27 02:46:53 +0000 | [diff] [blame] | 1993 | push_back(llvm:: |
| 1994 | AttributeSet::get(newFn->getContext(), |
| 1995 | oldAttrs.getParamAttributes(argNo + 1))); |
John McCall | a923c97 | 2012-12-12 22:21:47 +0000 | [diff] [blame] | 1996 | } |
| 1997 | if (dontTransform) |
| 1998 | continue; |
| 1999 | |
Bill Wendling | e67e4c9 | 2013-01-18 21:26:07 +0000 | [diff] [blame] | 2000 | if (oldAttrs.hasAttributes(llvm::AttributeSet::FunctionIndex)) |
Bill Wendling | b263bdf | 2013-01-27 02:46:53 +0000 | [diff] [blame] | 2001 | newAttrs.push_back(llvm::AttributeSet::get(newFn->getContext(), |
| 2002 | oldAttrs.getFnAttributes())); |
John McCall | a923c97 | 2012-12-12 22:21:47 +0000 | [diff] [blame] | 2003 | |
| 2004 | // Okay, we can transform this. Create the new call instruction and copy |
| 2005 | // over the required information. |
| 2006 | newArgs.append(callSite.arg_begin(), callSite.arg_begin() + argNo); |
| 2007 | |
| 2008 | llvm::CallSite newCall; |
| 2009 | if (callSite.isCall()) { |
| 2010 | newCall = llvm::CallInst::Create(newFn, newArgs, "", |
| 2011 | callSite.getInstruction()); |
| 2012 | } else { |
| 2013 | llvm::InvokeInst *oldInvoke = |
| 2014 | cast<llvm::InvokeInst>(callSite.getInstruction()); |
| 2015 | newCall = llvm::InvokeInst::Create(newFn, |
| 2016 | oldInvoke->getNormalDest(), |
| 2017 | oldInvoke->getUnwindDest(), |
| 2018 | newArgs, "", |
| 2019 | callSite.getInstruction()); |
| 2020 | } |
| 2021 | newArgs.clear(); // for the next iteration |
| 2022 | |
| 2023 | if (!newCall->getType()->isVoidTy()) |
| 2024 | newCall->takeName(callSite.getInstruction()); |
| 2025 | newCall.setAttributes( |
| 2026 | llvm::AttributeSet::get(newFn->getContext(), newAttrs)); |
| 2027 | newCall.setCallingConv(callSite.getCallingConv()); |
| 2028 | |
| 2029 | // Finally, remove the old call, replacing any uses with the new one. |
| 2030 | if (!callSite->use_empty()) |
| 2031 | callSite->replaceAllUsesWith(newCall.getInstruction()); |
| 2032 | |
| 2033 | // Copy debug location attached to CI. |
| 2034 | if (!callSite->getDebugLoc().isUnknown()) |
| 2035 | newCall->setDebugLoc(callSite->getDebugLoc()); |
| 2036 | callSite->eraseFromParent(); |
| 2037 | } |
| 2038 | } |
| 2039 | |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 2040 | /// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we |
| 2041 | /// implement a function with no prototype, e.g. "int foo() {}". If there are |
| 2042 | /// existing call uses of the old function in the module, this adjusts them to |
| 2043 | /// call the new function directly. |
| 2044 | /// |
| 2045 | /// This is not just a cleanup: the always_inline pass requires direct calls to |
| 2046 | /// functions to be able to inline them. If there is a bitcast in the way, it |
| 2047 | /// won't inline them. Instcombine normally deletes these calls, but it isn't |
| 2048 | /// run at -O0. |
| 2049 | static void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, |
| 2050 | llvm::Function *NewFn) { |
| 2051 | // If we're redefining a global as a function, don't transform it. |
John McCall | a923c97 | 2012-12-12 22:21:47 +0000 | [diff] [blame] | 2052 | if (!isa<llvm::Function>(Old)) return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2053 | |
John McCall | a923c97 | 2012-12-12 22:21:47 +0000 | [diff] [blame] | 2054 | replaceUsesOfNonProtoConstant(Old, NewFn); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 2055 | } |
| 2056 | |
Rafael Espindola | 0250393 | 2012-03-08 15:51:03 +0000 | [diff] [blame] | 2057 | void CodeGenModule::HandleCXXStaticMemberVarInstantiation(VarDecl *VD) { |
| 2058 | TemplateSpecializationKind TSK = VD->getTemplateSpecializationKind(); |
| 2059 | // If we have a definition, this might be a deferred decl. If the |
| 2060 | // instantiation is explicit, make sure we emit it at the end. |
| 2061 | if (VD->getDefinition() && TSK == TSK_ExplicitInstantiationDefinition) |
| 2062 | GetAddrOfGlobalVar(VD); |
Argyrios Kyrtzidis | afda905 | 2013-02-24 00:05:01 +0000 | [diff] [blame] | 2063 | |
| 2064 | EmitTopLevelDecl(VD); |
Rafael Espindola | 234fe65 | 2012-03-05 10:54:55 +0000 | [diff] [blame] | 2065 | } |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 2066 | |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 2067 | void CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 2068 | const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); |
John McCall | d26bc76 | 2011-03-09 04:27:21 +0000 | [diff] [blame] | 2069 | |
John McCall | 1f6f961 | 2011-03-09 08:12:35 +0000 | [diff] [blame] | 2070 | // Compute the function info and LLVM type. |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 2071 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD); |
| 2072 | llvm::FunctionType *Ty = getTypes().GetFunctionType(FI); |
John McCall | d26bc76 | 2011-03-09 04:27:21 +0000 | [diff] [blame] | 2073 | |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 2074 | // Get or create the prototype for the function. |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 2075 | llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2076 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 2077 | // Strip off a bitcast if we got one back. |
| 2078 | if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { |
| 2079 | assert(CE->getOpcode() == llvm::Instruction::BitCast); |
| 2080 | Entry = CE->getOperand(0); |
| 2081 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2082 | |
| 2083 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 2084 | if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 2085 | llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2086 | |
Daniel Dunbar | 4274581 | 2009-03-09 23:53:08 +0000 | [diff] [blame] | 2087 | // If the types mismatch then we have to rewrite the definition. |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 2088 | assert(OldFn->isDeclaration() && |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 2089 | "Shouldn't replace non-declaration"); |
Chris Lattner | 3480950 | 2009-03-21 08:53:37 +0000 | [diff] [blame] | 2090 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 2091 | // F is the Function* for the one with the wrong type, we must make a new |
| 2092 | // Function* and update everything that used F (a declaration) with the new |
| 2093 | // Function* (which will be a definition). |
| 2094 | // |
| 2095 | // This happens if there is a prototype for a function |
| 2096 | // (e.g. "int f()") and then a definition of a different type |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 2097 | // (e.g. "int f(int x)"). Move the old function aside so that it |
| 2098 | // doesn't interfere with GetAddrOfFunction. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2099 | OldFn->setName(StringRef()); |
Chris Lattner | b4880ba | 2009-05-12 21:21:08 +0000 | [diff] [blame] | 2100 | llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2101 | |
John McCall | a923c97 | 2012-12-12 22:21:47 +0000 | [diff] [blame] | 2102 | // This might be an implementation of a function without a |
| 2103 | // prototype, in which case, try to do special replacement of |
| 2104 | // calls which match the new prototype. The really key thing here |
| 2105 | // is that we also potentially drop arguments from the call site |
| 2106 | // so as to make a direct call, which makes the inliner happier |
| 2107 | // and suppresses a number of optimizer warnings (!) about |
| 2108 | // dropping arguments. |
| 2109 | if (!OldFn->use_empty()) { |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 2110 | ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); |
Chris Lattner | 9fa959d | 2009-05-12 20:58:15 +0000 | [diff] [blame] | 2111 | OldFn->removeDeadConstantUsers(); |
| 2112 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2113 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 2114 | // 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] | 2115 | if (!Entry->use_empty()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2116 | llvm::Constant *NewPtrForOldDecl = |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 2117 | llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 2118 | Entry->replaceAllUsesWith(NewPtrForOldDecl); |
| 2119 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2120 | |
Chris Lattner | 62b33ea | 2009-03-21 08:38:50 +0000 | [diff] [blame] | 2121 | // Ok, delete the old function now, which is dead. |
Chris Lattner | bdb0132 | 2009-05-05 06:16:31 +0000 | [diff] [blame] | 2122 | OldFn->eraseFromParent(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2123 | |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 2124 | Entry = NewFn; |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 2125 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2126 | |
John McCall | 112c967 | 2010-11-02 21:04:24 +0000 | [diff] [blame] | 2127 | // We need to set linkage and visibility on the function before |
| 2128 | // generating code for it because various parts of IR generation |
| 2129 | // want to propagate this information down (e.g. to local static |
| 2130 | // declarations). |
Chris Lattner | 0558e79 | 2009-03-21 09:25:43 +0000 | [diff] [blame] | 2131 | llvm::Function *Fn = cast<llvm::Function>(Entry); |
Peter Collingbourne | 144a31f | 2013-06-05 17:49:37 +0000 | [diff] [blame] | 2132 | setFunctionLinkage(GD, Fn); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 2133 | |
John McCall | 112c967 | 2010-11-02 21:04:24 +0000 | [diff] [blame] | 2134 | // FIXME: this is redundant with part of SetFunctionDefinitionAttributes |
Anders Carlsson | 0ffeaad | 2011-01-29 19:39:23 +0000 | [diff] [blame] | 2135 | setGlobalVisibility(Fn, D); |
John McCall | 112c967 | 2010-11-02 21:04:24 +0000 | [diff] [blame] | 2136 | |
Richard Smith | 0024937 | 2013-04-06 05:00:46 +0000 | [diff] [blame] | 2137 | MaybeHandleStaticInExternC(D, Fn); |
| 2138 | |
John McCall | d26bc76 | 2011-03-09 04:27:21 +0000 | [diff] [blame] | 2139 | CodeGenFunction(*this).GenerateCode(D, Fn, FI); |
Daniel Dunbar | 6bfed7e | 2008-08-01 00:01:51 +0000 | [diff] [blame] | 2140 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 2141 | SetFunctionDefinitionAttributes(D, Fn); |
| 2142 | SetLLVMFunctionAttributesForDefinition(D, Fn); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2143 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2144 | if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 2145 | AddGlobalCtor(Fn, CA->getPriority()); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2146 | if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) |
Daniel Dunbar | 219df66 | 2008-09-08 23:44:31 +0000 | [diff] [blame] | 2147 | AddGlobalDtor(Fn, DA->getPriority()); |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 2148 | if (D->hasAttr<AnnotateAttr>()) |
| 2149 | AddGlobalAnnotations(D, Fn); |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 2150 | } |
| 2151 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 2152 | void CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { |
| 2153 | const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2154 | const AliasAttr *AA = D->getAttr<AliasAttr>(); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 2155 | assert(AA && "Not an alias?"); |
| 2156 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2157 | StringRef MangledName = getMangledName(GD); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2158 | |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 2159 | // If there is a definition in the module, then it wins over the alias. |
| 2160 | // This is dubious, but allow it to be safe. Just ignore the alias. |
| 2161 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); |
| 2162 | if (Entry && !Entry->isDeclaration()) |
| 2163 | return; |
| 2164 | |
Rafael Espindola | d205498 | 2013-10-22 19:26:13 +0000 | [diff] [blame] | 2165 | Aliases.push_back(GD); |
| 2166 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2167 | llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 2168 | |
| 2169 | // Create a reference to the named value. This ensures that it is emitted |
| 2170 | // if a deferred decl. |
| 2171 | llvm::Constant *Aliasee; |
| 2172 | if (isa<llvm::FunctionType>(DeclTy)) |
Alex Rosenberg | c857ce8 | 2012-10-05 23:12:53 +0000 | [diff] [blame] | 2173 | Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GD, |
Anders Carlsson | 1faa89f | 2011-02-05 04:35:53 +0000 | [diff] [blame] | 2174 | /*ForVTable=*/false); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 2175 | else |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 2176 | Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 2177 | llvm::PointerType::getUnqual(DeclTy), 0); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 2178 | |
| 2179 | // Create the new alias itself, but don't set a name yet. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2180 | llvm::GlobalValue *GA = |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 2181 | new llvm::GlobalAlias(Aliasee->getType(), |
| 2182 | llvm::Function::ExternalLinkage, |
| 2183 | "", Aliasee, &getModule()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2184 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 2185 | if (Entry) { |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 2186 | assert(Entry->isDeclaration()); |
| 2187 | |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 2188 | // If there is a declaration in the module, then we had an extern followed |
| 2189 | // by the alias, as in: |
| 2190 | // extern int test6(); |
| 2191 | // ... |
| 2192 | // int test6() __attribute__((alias("test7"))); |
| 2193 | // |
| 2194 | // Remove it and replace uses of it with the alias. |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 2195 | GA->takeName(Entry); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2196 | |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 2197 | Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 2198 | Entry->getType())); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 2199 | Entry->eraseFromParent(); |
John McCall | f746aa6 | 2010-03-19 23:29:14 +0000 | [diff] [blame] | 2200 | } else { |
Anders Carlsson | 9a20d55 | 2010-06-22 16:16:50 +0000 | [diff] [blame] | 2201 | GA->setName(MangledName); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 2202 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2203 | |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 2204 | // Set attributes which are particular to an alias; this is a |
| 2205 | // specialization of the attributes which may be set on a global |
| 2206 | // variable/function. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2207 | if (D->hasAttr<DLLExportAttr>()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 2208 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 2209 | // The dllexport attribute is ignored for undefined symbols. |
Argyrios Kyrtzidis | 06a54a3 | 2010-07-07 11:31:19 +0000 | [diff] [blame] | 2210 | if (FD->hasBody()) |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 2211 | GA->setLinkage(llvm::Function::DLLExportLinkage); |
| 2212 | } else { |
| 2213 | GA->setLinkage(llvm::Function::DLLExportLinkage); |
| 2214 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2215 | } else if (D->hasAttr<WeakAttr>() || |
Rafael Espindola | 11e8ce7 | 2010-02-23 22:00:30 +0000 | [diff] [blame] | 2216 | D->hasAttr<WeakRefAttr>() || |
Douglas Gregor | 0a0d2b1 | 2011-03-23 00:50:03 +0000 | [diff] [blame] | 2217 | D->isWeakImported()) { |
Daniel Dunbar | 7c65e99 | 2009-04-14 08:05:55 +0000 | [diff] [blame] | 2218 | GA->setLinkage(llvm::Function::WeakAnyLinkage); |
| 2219 | } |
| 2220 | |
| 2221 | SetCommonAttributes(D, GA); |
Chris Lattner | bd53271 | 2009-03-22 21:47:11 +0000 | [diff] [blame] | 2222 | } |
| 2223 | |
Benjamin Kramer | 8dd55a3 | 2011-07-14 17:45:50 +0000 | [diff] [blame] | 2224 | llvm::Function *CodeGenModule::getIntrinsic(unsigned IID, |
Chris Lattner | 2d3ba4f | 2011-07-23 17:14:25 +0000 | [diff] [blame] | 2225 | ArrayRef<llvm::Type*> Tys) { |
Jay Foad | df983a8 | 2011-07-12 14:06:48 +0000 | [diff] [blame] | 2226 | return llvm::Intrinsic::getDeclaration(&getModule(), (llvm::Intrinsic::ID)IID, |
Benjamin Kramer | 8dd55a3 | 2011-07-14 17:45:50 +0000 | [diff] [blame] | 2227 | Tys); |
Chris Lattner | 7acda7c | 2007-12-18 00:25:38 +0000 | [diff] [blame] | 2228 | } |
Chris Lattner | bef20ac | 2007-08-31 04:31:45 +0000 | [diff] [blame] | 2229 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 2230 | static llvm::StringMapEntry<llvm::Constant*> & |
| 2231 | GetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, |
| 2232 | const StringLiteral *Literal, |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 2233 | bool TargetIsLSB, |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 2234 | bool &IsUTF16, |
| 2235 | unsigned &StringLength) { |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2236 | StringRef String = Literal->getString(); |
Benjamin Kramer | 2f4eaef | 2010-08-17 12:54:38 +0000 | [diff] [blame] | 2237 | unsigned NumBytes = String.size(); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 2238 | |
Daniel Dunbar | f015b03 | 2009-09-22 10:03:52 +0000 | [diff] [blame] | 2239 | // Check for simple case. |
| 2240 | if (!Literal->containsNonAsciiOrNull()) { |
| 2241 | StringLength = NumBytes; |
Benjamin Kramer | 2f4eaef | 2010-08-17 12:54:38 +0000 | [diff] [blame] | 2242 | return Map.GetOrCreateValue(String); |
Daniel Dunbar | f015b03 | 2009-09-22 10:03:52 +0000 | [diff] [blame] | 2243 | } |
| 2244 | |
Bill Wendling | 84392d0 | 2012-03-30 00:26:17 +0000 | [diff] [blame] | 2245 | // Otherwise, convert the UTF8 literals into a string of shorts. |
| 2246 | IsUTF16 = true; |
| 2247 | |
| 2248 | SmallVector<UTF16, 128> ToBuf(NumBytes + 1); // +1 for ending nulls. |
Roman Divacky | 31ba613 | 2012-09-06 15:59:27 +0000 | [diff] [blame] | 2249 | const UTF8 *FromPtr = (const UTF8 *)String.data(); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 2250 | UTF16 *ToPtr = &ToBuf[0]; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2251 | |
Fariborz Jahanian | e7ddfb9 | 2010-09-07 19:57:04 +0000 | [diff] [blame] | 2252 | (void)ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, |
| 2253 | &ToPtr, ToPtr + NumBytes, |
| 2254 | strictConversion); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2255 | |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 2256 | // ConvertUTF8toUTF16 returns the length in ToPtr. |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 2257 | StringLength = ToPtr - &ToBuf[0]; |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 2258 | |
Bill Wendling | 84392d0 | 2012-03-30 00:26:17 +0000 | [diff] [blame] | 2259 | // Add an explicit null. |
| 2260 | *ToPtr = 0; |
| 2261 | return Map. |
| 2262 | GetOrCreateValue(StringRef(reinterpret_cast<const char *>(ToBuf.data()), |
| 2263 | (StringLength + 1) * 2)); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 2264 | } |
| 2265 | |
Fariborz Jahanian | cf8e168 | 2011-05-13 18:13:10 +0000 | [diff] [blame] | 2266 | static llvm::StringMapEntry<llvm::Constant*> & |
| 2267 | GetConstantStringEntry(llvm::StringMap<llvm::Constant*> &Map, |
Bill Wendling | 8322c23 | 2012-03-29 22:12:09 +0000 | [diff] [blame] | 2268 | const StringLiteral *Literal, |
| 2269 | unsigned &StringLength) { |
| 2270 | StringRef String = Literal->getString(); |
| 2271 | StringLength = String.size(); |
| 2272 | return Map.GetOrCreateValue(String); |
Fariborz Jahanian | cf8e168 | 2011-05-13 18:13:10 +0000 | [diff] [blame] | 2273 | } |
| 2274 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 2275 | llvm::Constant * |
| 2276 | CodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { |
| 2277 | unsigned StringLength = 0; |
| 2278 | bool isUTF16 = false; |
| 2279 | llvm::StringMapEntry<llvm::Constant*> &Entry = |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2280 | GetConstantCFStringEntry(CFConstantStringMap, Literal, |
Micah Villmow | 25a6a84 | 2012-10-08 16:25:52 +0000 | [diff] [blame] | 2281 | getDataLayout().isLittleEndian(), |
Daniel Dunbar | 70ee975 | 2009-07-23 23:41:22 +0000 | [diff] [blame] | 2282 | isUTF16, StringLength); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2283 | |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 2284 | if (llvm::Constant *C = Entry.getValue()) |
| 2285 | return C; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2286 | |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 2287 | llvm::Constant *Zero = llvm::Constant::getNullValue(Int32Ty); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 2288 | llvm::Constant *Zeros[] = { Zero, Zero }; |
Fariborz Jahanian | 428edb7 | 2013-04-16 15:25:39 +0000 | [diff] [blame] | 2289 | llvm::Value *V; |
| 2290 | |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 2291 | // If we don't already have it, get __CFConstantStringClassReference. |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 2292 | if (!CFConstantStringClassRef) { |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2293 | llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 2294 | Ty = llvm::ArrayType::get(Ty, 0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2295 | llvm::Constant *GV = CreateRuntimeVariable(Ty, |
Chris Lattner | 9d4a15f | 2009-07-16 16:48:25 +0000 | [diff] [blame] | 2296 | "__CFConstantStringClassReference"); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 2297 | // Decay array -> ptr |
Fariborz Jahanian | 428edb7 | 2013-04-16 15:25:39 +0000 | [diff] [blame] | 2298 | V = llvm::ConstantExpr::getGetElementPtr(GV, Zeros); |
| 2299 | CFConstantStringClassRef = V; |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 2300 | } |
Fariborz Jahanian | 428edb7 | 2013-04-16 15:25:39 +0000 | [diff] [blame] | 2301 | else |
| 2302 | V = CFConstantStringClassRef; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2303 | |
Anders Carlsson | e3daa76 | 2008-11-15 18:54:24 +0000 | [diff] [blame] | 2304 | QualType CFTy = getContext().getCFConstantStringType(); |
Daniel Dunbar | 3e9df99 | 2008-08-23 18:37:06 +0000 | [diff] [blame] | 2305 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2306 | llvm::StructType *STy = |
Anders Carlsson | e3daa76 | 2008-11-15 18:54:24 +0000 | [diff] [blame] | 2307 | cast<llvm::StructType>(getTypes().ConvertType(CFTy)); |
| 2308 | |
Benjamin Kramer | 1d236ab | 2011-10-15 12:20:02 +0000 | [diff] [blame] | 2309 | llvm::Constant *Fields[4]; |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 2310 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 2311 | // Class pointer. |
Fariborz Jahanian | 428edb7 | 2013-04-16 15:25:39 +0000 | [diff] [blame] | 2312 | Fields[0] = cast<llvm::ConstantExpr>(V); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2313 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 2314 | // Flags. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2315 | llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2316 | Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 2317 | llvm::ConstantInt::get(Ty, 0x07C8); |
| 2318 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 2319 | // String pointer. |
Bill Wendling | 84392d0 | 2012-03-30 00:26:17 +0000 | [diff] [blame] | 2320 | llvm::Constant *C = 0; |
| 2321 | if (isUTF16) { |
| 2322 | ArrayRef<uint16_t> Arr = |
David Greene | 5ba58a1 | 2013-01-15 22:09:41 +0000 | [diff] [blame] | 2323 | llvm::makeArrayRef<uint16_t>(reinterpret_cast<uint16_t*>( |
| 2324 | const_cast<char *>(Entry.getKey().data())), |
Bill Wendling | 84392d0 | 2012-03-30 00:26:17 +0000 | [diff] [blame] | 2325 | Entry.getKey().size() / 2); |
| 2326 | C = llvm::ConstantDataArray::get(VMContext, Arr); |
| 2327 | } else { |
| 2328 | C = llvm::ConstantDataArray::getString(VMContext, Entry.getKey()); |
| 2329 | } |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 2330 | |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 2331 | llvm::GlobalValue::LinkageTypes Linkage; |
Bill Wendling | 1bf7a3f | 2012-01-10 08:46:39 +0000 | [diff] [blame] | 2332 | if (isUTF16) |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 2333 | // FIXME: why do utf strings get "_" labels instead of "L" labels? |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 2334 | Linkage = llvm::GlobalValue::InternalLinkage; |
Bill Wendling | 1bf7a3f | 2012-01-10 08:46:39 +0000 | [diff] [blame] | 2335 | else |
Rafael Espindola | 584acf2 | 2011-03-14 17:55:00 +0000 | [diff] [blame] | 2336 | // FIXME: With OS X ld 123.2 (xcode 4) and LTO we would get a linker error |
| 2337 | // when using private linkage. It is not clear if this is a bug in ld |
| 2338 | // or a reasonable new restriction. |
Rafael Espindola | dc0f137 | 2011-03-14 21:08:19 +0000 | [diff] [blame] | 2339 | Linkage = llvm::GlobalValue::LinkerPrivateLinkage; |
Chris Lattner | 278b9f0 | 2009-10-14 05:55:45 +0000 | [diff] [blame] | 2340 | |
Bill Wendling | 1bf7a3f | 2012-01-10 08:46:39 +0000 | [diff] [blame] | 2341 | // Note: -fwritable-strings doesn't make the backing store strings of |
| 2342 | // CFStrings writable. (See <rdar://problem/10657500>) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2343 | llvm::GlobalVariable *GV = |
Bill Wendling | 1bf7a3f | 2012-01-10 08:46:39 +0000 | [diff] [blame] | 2344 | new llvm::GlobalVariable(getModule(), C->getType(), /*isConstant=*/true, |
| 2345 | Linkage, C, ".str"); |
Rafael Espindola | b266a1f | 2011-01-17 16:31:00 +0000 | [diff] [blame] | 2346 | GV->setUnnamedAddr(true); |
Ulrich Weigand | 6b20351 | 2013-05-06 16:23:57 +0000 | [diff] [blame] | 2347 | // Don't enforce the target's minimum global alignment, since the only use |
| 2348 | // of the string is via this class initializer. |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 2349 | if (isUTF16) { |
Ken Dyck | 4da244c | 2010-01-26 18:46:23 +0000 | [diff] [blame] | 2350 | CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); |
| 2351 | GV->setAlignment(Align.getQuantity()); |
Daniel Dunbar | f7e903d | 2011-04-12 23:30:52 +0000 | [diff] [blame] | 2352 | } else { |
| 2353 | CharUnits Align = getContext().getTypeAlignInChars(getContext().CharTy); |
| 2354 | GV->setAlignment(Align.getQuantity()); |
Daniel Dunbar | a9668e0 | 2009-04-03 00:57:44 +0000 | [diff] [blame] | 2355 | } |
Bill Wendling | 84392d0 | 2012-03-30 00:26:17 +0000 | [diff] [blame] | 2356 | |
| 2357 | // String. |
Jay Foad | a5c0434 | 2011-07-21 14:31:17 +0000 | [diff] [blame] | 2358 | Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros); |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 2359 | |
Bill Wendling | 84392d0 | 2012-03-30 00:26:17 +0000 | [diff] [blame] | 2360 | if (isUTF16) |
| 2361 | // Cast the UTF16 string to the correct type. |
| 2362 | Fields[2] = llvm::ConstantExpr::getBitCast(Fields[2], Int8PtrTy); |
| 2363 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 2364 | // String length. |
| 2365 | Ty = getTypes().ConvertType(getContext().LongTy); |
Anders Carlsson | 5add683 | 2009-08-16 05:55:31 +0000 | [diff] [blame] | 2366 | Fields[3] = llvm::ConstantInt::get(Ty, StringLength); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2367 | |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 2368 | // The struct. |
Owen Anderson | 08e2524 | 2009-07-27 22:29:56 +0000 | [diff] [blame] | 2369 | C = llvm::ConstantStruct::get(STy, Fields); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2370 | GV = new llvm::GlobalVariable(getModule(), C->getType(), true, |
| 2371 | llvm::GlobalVariable::PrivateLinkage, C, |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 2372 | "_unnamed_cfstring_"); |
John McCall | 64aa4b3 | 2013-04-16 22:48:15 +0000 | [diff] [blame] | 2373 | if (const char *Sect = getTarget().getCFStringSection()) |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 2374 | GV->setSection(Sect); |
Daniel Dunbar | 1d55291 | 2009-07-23 22:52:48 +0000 | [diff] [blame] | 2375 | Entry.setValue(GV); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2376 | |
Anders Carlsson | 0c67829 | 2007-11-01 00:41:52 +0000 | [diff] [blame] | 2377 | return GV; |
Anders Carlsson | c9e2091 | 2007-08-21 00:21:21 +0000 | [diff] [blame] | 2378 | } |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 2379 | |
Douglas Gregor | 45c4ea7 | 2011-08-09 15:54:21 +0000 | [diff] [blame] | 2380 | static RecordDecl * |
| 2381 | CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, |
| 2382 | DeclContext *DC, IdentifierInfo *Id) { |
| 2383 | SourceLocation Loc; |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2384 | if (Ctx.getLangOpts().CPlusPlus) |
Douglas Gregor | 45c4ea7 | 2011-08-09 15:54:21 +0000 | [diff] [blame] | 2385 | return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); |
| 2386 | else |
| 2387 | return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); |
| 2388 | } |
| 2389 | |
Fariborz Jahanian | 33e982b | 2010-04-22 20:26:39 +0000 | [diff] [blame] | 2390 | llvm::Constant * |
Fariborz Jahanian | 4c73307 | 2010-10-19 17:19:29 +0000 | [diff] [blame] | 2391 | CodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) { |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2392 | unsigned StringLength = 0; |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2393 | llvm::StringMapEntry<llvm::Constant*> &Entry = |
Fariborz Jahanian | cf8e168 | 2011-05-13 18:13:10 +0000 | [diff] [blame] | 2394 | GetConstantStringEntry(CFConstantStringMap, Literal, StringLength); |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2395 | |
| 2396 | if (llvm::Constant *C = Entry.getValue()) |
| 2397 | return C; |
| 2398 | |
Chris Lattner | 812234b | 2012-02-06 22:47:00 +0000 | [diff] [blame] | 2399 | llvm::Constant *Zero = llvm::Constant::getNullValue(Int32Ty); |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2400 | llvm::Constant *Zeros[] = { Zero, Zero }; |
Fariborz Jahanian | 428edb7 | 2013-04-16 15:25:39 +0000 | [diff] [blame] | 2401 | llvm::Value *V; |
Fariborz Jahanian | ec951e0 | 2010-04-23 22:33:39 +0000 | [diff] [blame] | 2402 | // If we don't already have it, get _NSConstantStringClassReference. |
Fariborz Jahanian | 4c73307 | 2010-10-19 17:19:29 +0000 | [diff] [blame] | 2403 | if (!ConstantStringClassRef) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2404 | std::string StringClass(getLangOpts().ObjCConstantStringClass); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2405 | llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); |
Fariborz Jahanian | 4c73307 | 2010-10-19 17:19:29 +0000 | [diff] [blame] | 2406 | llvm::Constant *GV; |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 2407 | if (LangOpts.ObjCRuntime.isNonFragile()) { |
Fariborz Jahanian | 25dba5d | 2011-05-17 22:46:11 +0000 | [diff] [blame] | 2408 | std::string str = |
| 2409 | StringClass.empty() ? "OBJC_CLASS_$_NSConstantString" |
| 2410 | : "OBJC_CLASS_$_" + StringClass; |
Fariborz Jahanian | 6f40e22 | 2011-05-17 22:21:16 +0000 | [diff] [blame] | 2411 | GV = getObjCRuntime().GetClassGlobal(str); |
| 2412 | // Make sure the result is of the correct type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2413 | llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); |
Fariborz Jahanian | 428edb7 | 2013-04-16 15:25:39 +0000 | [diff] [blame] | 2414 | V = llvm::ConstantExpr::getBitCast(GV, PTy); |
| 2415 | ConstantStringClassRef = V; |
Fariborz Jahanian | 6f40e22 | 2011-05-17 22:21:16 +0000 | [diff] [blame] | 2416 | } else { |
Fariborz Jahanian | 25dba5d | 2011-05-17 22:46:11 +0000 | [diff] [blame] | 2417 | std::string str = |
| 2418 | StringClass.empty() ? "_NSConstantStringClassReference" |
| 2419 | : "_" + StringClass + "ClassReference"; |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2420 | llvm::Type *PTy = llvm::ArrayType::get(Ty, 0); |
Fariborz Jahanian | 25dba5d | 2011-05-17 22:46:11 +0000 | [diff] [blame] | 2421 | GV = CreateRuntimeVariable(PTy, str); |
Fariborz Jahanian | 6f40e22 | 2011-05-17 22:21:16 +0000 | [diff] [blame] | 2422 | // Decay array -> ptr |
Fariborz Jahanian | 428edb7 | 2013-04-16 15:25:39 +0000 | [diff] [blame] | 2423 | V = llvm::ConstantExpr::getGetElementPtr(GV, Zeros); |
| 2424 | ConstantStringClassRef = V; |
Fariborz Jahanian | 4c73307 | 2010-10-19 17:19:29 +0000 | [diff] [blame] | 2425 | } |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2426 | } |
Fariborz Jahanian | 428edb7 | 2013-04-16 15:25:39 +0000 | [diff] [blame] | 2427 | else |
| 2428 | V = ConstantStringClassRef; |
Douglas Gregor | 45c4ea7 | 2011-08-09 15:54:21 +0000 | [diff] [blame] | 2429 | |
| 2430 | if (!NSConstantStringType) { |
| 2431 | // Construct the type for a constant NSString. |
| 2432 | RecordDecl *D = CreateRecordDecl(Context, TTK_Struct, |
| 2433 | Context.getTranslationUnitDecl(), |
| 2434 | &Context.Idents.get("__builtin_NSString")); |
| 2435 | D->startDefinition(); |
| 2436 | |
| 2437 | QualType FieldTypes[3]; |
| 2438 | |
| 2439 | // const int *isa; |
| 2440 | FieldTypes[0] = Context.getPointerType(Context.IntTy.withConst()); |
| 2441 | // const char *str; |
| 2442 | FieldTypes[1] = Context.getPointerType(Context.CharTy.withConst()); |
| 2443 | // unsigned int length; |
| 2444 | FieldTypes[2] = Context.UnsignedIntTy; |
| 2445 | |
| 2446 | // Create fields |
| 2447 | for (unsigned i = 0; i < 3; ++i) { |
| 2448 | FieldDecl *Field = FieldDecl::Create(Context, D, |
| 2449 | SourceLocation(), |
| 2450 | SourceLocation(), 0, |
| 2451 | FieldTypes[i], /*TInfo=*/0, |
| 2452 | /*BitWidth=*/0, |
| 2453 | /*Mutable=*/false, |
Richard Smith | ca52330 | 2012-06-10 03:12:00 +0000 | [diff] [blame] | 2454 | ICIS_NoInit); |
Douglas Gregor | 45c4ea7 | 2011-08-09 15:54:21 +0000 | [diff] [blame] | 2455 | Field->setAccess(AS_public); |
| 2456 | D->addDecl(Field); |
| 2457 | } |
| 2458 | |
| 2459 | D->completeDefinition(); |
| 2460 | QualType NSTy = Context.getTagDeclType(D); |
| 2461 | NSConstantStringType = cast<llvm::StructType>(getTypes().ConvertType(NSTy)); |
| 2462 | } |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2463 | |
Benjamin Kramer | 1d236ab | 2011-10-15 12:20:02 +0000 | [diff] [blame] | 2464 | llvm::Constant *Fields[3]; |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2465 | |
| 2466 | // Class pointer. |
Fariborz Jahanian | 428edb7 | 2013-04-16 15:25:39 +0000 | [diff] [blame] | 2467 | Fields[0] = cast<llvm::ConstantExpr>(V); |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2468 | |
| 2469 | // String pointer. |
Chris Lattner | 9401069 | 2012-02-05 02:30:40 +0000 | [diff] [blame] | 2470 | llvm::Constant *C = |
| 2471 | llvm::ConstantDataArray::getString(VMContext, Entry.getKey()); |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2472 | |
| 2473 | llvm::GlobalValue::LinkageTypes Linkage; |
| 2474 | bool isConstant; |
Fariborz Jahanian | cf8e168 | 2011-05-13 18:13:10 +0000 | [diff] [blame] | 2475 | Linkage = llvm::GlobalValue::PrivateLinkage; |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2476 | isConstant = !LangOpts.WritableStrings; |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2477 | |
| 2478 | llvm::GlobalVariable *GV = |
| 2479 | new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, |
| 2480 | ".str"); |
Rafael Espindola | 803d307 | 2011-01-17 22:11:21 +0000 | [diff] [blame] | 2481 | GV->setUnnamedAddr(true); |
Ulrich Weigand | 6b20351 | 2013-05-06 16:23:57 +0000 | [diff] [blame] | 2482 | // Don't enforce the target's minimum global alignment, since the only use |
| 2483 | // of the string is via this class initializer. |
Fariborz Jahanian | cf8e168 | 2011-05-13 18:13:10 +0000 | [diff] [blame] | 2484 | CharUnits Align = getContext().getTypeAlignInChars(getContext().CharTy); |
| 2485 | GV->setAlignment(Align.getQuantity()); |
Jay Foad | a5c0434 | 2011-07-21 14:31:17 +0000 | [diff] [blame] | 2486 | Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros); |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2487 | |
| 2488 | // String length. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2489 | llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2490 | Fields[2] = llvm::ConstantInt::get(Ty, StringLength); |
| 2491 | |
| 2492 | // The struct. |
Douglas Gregor | 45c4ea7 | 2011-08-09 15:54:21 +0000 | [diff] [blame] | 2493 | C = llvm::ConstantStruct::get(NSConstantStringType, Fields); |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2494 | GV = new llvm::GlobalVariable(getModule(), C->getType(), true, |
| 2495 | llvm::GlobalVariable::PrivateLinkage, C, |
| 2496 | "_unnamed_nsstring_"); |
| 2497 | // FIXME. Fix section. |
Fariborz Jahanian | ec951e0 | 2010-04-23 22:33:39 +0000 | [diff] [blame] | 2498 | if (const char *Sect = |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 2499 | LangOpts.ObjCRuntime.isNonFragile() |
John McCall | 64aa4b3 | 2013-04-16 22:48:15 +0000 | [diff] [blame] | 2500 | ? getTarget().getNSStringNonFragileABISection() |
| 2501 | : getTarget().getNSStringSection()) |
Fariborz Jahanian | 2bb5dda | 2010-04-23 17:41:07 +0000 | [diff] [blame] | 2502 | GV->setSection(Sect); |
| 2503 | Entry.setValue(GV); |
| 2504 | |
| 2505 | return GV; |
Fariborz Jahanian | 33e982b | 2010-04-22 20:26:39 +0000 | [diff] [blame] | 2506 | } |
| 2507 | |
Douglas Gregor | 0815b57 | 2011-08-09 17:23:49 +0000 | [diff] [blame] | 2508 | QualType CodeGenModule::getObjCFastEnumerationStateType() { |
| 2509 | if (ObjCFastEnumerationStateType.isNull()) { |
| 2510 | RecordDecl *D = CreateRecordDecl(Context, TTK_Struct, |
| 2511 | Context.getTranslationUnitDecl(), |
| 2512 | &Context.Idents.get("__objcFastEnumerationState")); |
| 2513 | D->startDefinition(); |
| 2514 | |
| 2515 | QualType FieldTypes[] = { |
| 2516 | Context.UnsignedLongTy, |
| 2517 | Context.getPointerType(Context.getObjCIdType()), |
| 2518 | Context.getPointerType(Context.UnsignedLongTy), |
| 2519 | Context.getConstantArrayType(Context.UnsignedLongTy, |
| 2520 | llvm::APInt(32, 5), ArrayType::Normal, 0) |
| 2521 | }; |
| 2522 | |
| 2523 | for (size_t i = 0; i < 4; ++i) { |
| 2524 | FieldDecl *Field = FieldDecl::Create(Context, |
| 2525 | D, |
| 2526 | SourceLocation(), |
| 2527 | SourceLocation(), 0, |
| 2528 | FieldTypes[i], /*TInfo=*/0, |
| 2529 | /*BitWidth=*/0, |
| 2530 | /*Mutable=*/false, |
Richard Smith | ca52330 | 2012-06-10 03:12:00 +0000 | [diff] [blame] | 2531 | ICIS_NoInit); |
Douglas Gregor | 0815b57 | 2011-08-09 17:23:49 +0000 | [diff] [blame] | 2532 | Field->setAccess(AS_public); |
| 2533 | D->addDecl(Field); |
| 2534 | } |
| 2535 | |
| 2536 | D->completeDefinition(); |
| 2537 | ObjCFastEnumerationStateType = Context.getTagDeclType(D); |
| 2538 | } |
| 2539 | |
| 2540 | return ObjCFastEnumerationStateType; |
| 2541 | } |
| 2542 | |
Eli Friedman | 64f45a2 | 2011-11-01 02:23:42 +0000 | [diff] [blame] | 2543 | llvm::Constant * |
| 2544 | CodeGenModule::GetConstantArrayFromStringLiteral(const StringLiteral *E) { |
| 2545 | assert(!E->getType()->isPointerType() && "Strings are always arrays"); |
| 2546 | |
| 2547 | // Don't emit it as the address of the string, emit the string data itself |
| 2548 | // as an inline array. |
Chris Lattner | 812234b | 2012-02-06 22:47:00 +0000 | [diff] [blame] | 2549 | if (E->getCharByteWidth() == 1) { |
| 2550 | SmallString<64> Str(E->getString()); |
| 2551 | |
| 2552 | // Resize the string to the right size, which is indicated by its type. |
| 2553 | const ConstantArrayType *CAT = Context.getAsConstantArrayType(E->getType()); |
| 2554 | Str.resize(CAT->getSize().getZExtValue()); |
| 2555 | return llvm::ConstantDataArray::getString(VMContext, Str, false); |
| 2556 | } |
Chris Lattner | 9401069 | 2012-02-05 02:30:40 +0000 | [diff] [blame] | 2557 | |
| 2558 | llvm::ArrayType *AType = |
| 2559 | cast<llvm::ArrayType>(getTypes().ConvertType(E->getType())); |
| 2560 | llvm::Type *ElemTy = AType->getElementType(); |
| 2561 | unsigned NumElements = AType->getNumElements(); |
Chris Lattner | d79ed43 | 2012-02-06 22:52:04 +0000 | [diff] [blame] | 2562 | |
| 2563 | // Wide strings have either 2-byte or 4-byte elements. |
| 2564 | if (ElemTy->getPrimitiveSizeInBits() == 16) { |
| 2565 | SmallVector<uint16_t, 32> Elements; |
| 2566 | Elements.reserve(NumElements); |
| 2567 | |
| 2568 | for(unsigned i = 0, e = E->getLength(); i != e; ++i) |
| 2569 | Elements.push_back(E->getCodeUnit(i)); |
| 2570 | Elements.resize(NumElements); |
| 2571 | return llvm::ConstantDataArray::get(VMContext, Elements); |
Chris Lattner | 9401069 | 2012-02-05 02:30:40 +0000 | [diff] [blame] | 2572 | } |
| 2573 | |
Chris Lattner | d79ed43 | 2012-02-06 22:52:04 +0000 | [diff] [blame] | 2574 | assert(ElemTy->getPrimitiveSizeInBits() == 32); |
| 2575 | SmallVector<uint32_t, 32> Elements; |
| 2576 | Elements.reserve(NumElements); |
| 2577 | |
| 2578 | for(unsigned i = 0, e = E->getLength(); i != e; ++i) |
| 2579 | Elements.push_back(E->getCodeUnit(i)); |
| 2580 | Elements.resize(NumElements); |
| 2581 | return llvm::ConstantDataArray::get(VMContext, Elements); |
Eli Friedman | 64f45a2 | 2011-11-01 02:23:42 +0000 | [diff] [blame] | 2582 | } |
| 2583 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 2584 | /// GetAddrOfConstantStringFromLiteral - Return a pointer to a |
| 2585 | /// constant array for the given string literal. |
| 2586 | llvm::Constant * |
| 2587 | CodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { |
Ulrich Weigand | 6b20351 | 2013-05-06 16:23:57 +0000 | [diff] [blame] | 2588 | CharUnits Align = getContext().getAlignOfGlobalVarInChars(S->getType()); |
Eli Friedman | 64f45a2 | 2011-11-01 02:23:42 +0000 | [diff] [blame] | 2589 | if (S->isAscii() || S->isUTF8()) { |
Chris Lattner | 812234b | 2012-02-06 22:47:00 +0000 | [diff] [blame] | 2590 | SmallString<64> Str(S->getString()); |
| 2591 | |
| 2592 | // Resize the string to the right size, which is indicated by its type. |
| 2593 | const ConstantArrayType *CAT = Context.getAsConstantArrayType(S->getType()); |
| 2594 | Str.resize(CAT->getSize().getZExtValue()); |
| 2595 | return GetAddrOfConstantString(Str, /*GlobalName*/ 0, Align.getQuantity()); |
Eli Friedman | 7eb79c1 | 2009-11-16 05:55:46 +0000 | [diff] [blame] | 2596 | } |
Eli Friedman | 64f45a2 | 2011-11-01 02:23:42 +0000 | [diff] [blame] | 2597 | |
Chris Lattner | 812234b | 2012-02-06 22:47:00 +0000 | [diff] [blame] | 2598 | // FIXME: the following does not memoize wide strings. |
Eli Friedman | 64f45a2 | 2011-11-01 02:23:42 +0000 | [diff] [blame] | 2599 | llvm::Constant *C = GetConstantArrayFromStringLiteral(S); |
| 2600 | llvm::GlobalVariable *GV = |
| 2601 | new llvm::GlobalVariable(getModule(),C->getType(), |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2602 | !LangOpts.WritableStrings, |
Eli Friedman | 64f45a2 | 2011-11-01 02:23:42 +0000 | [diff] [blame] | 2603 | llvm::GlobalValue::PrivateLinkage, |
| 2604 | C,".str"); |
Seth Cantrell | 7d6a7c0 | 2012-01-18 12:11:32 +0000 | [diff] [blame] | 2605 | |
Eli Friedman | 64f45a2 | 2011-11-01 02:23:42 +0000 | [diff] [blame] | 2606 | GV->setAlignment(Align.getQuantity()); |
| 2607 | GV->setUnnamedAddr(true); |
Eli Friedman | 64f45a2 | 2011-11-01 02:23:42 +0000 | [diff] [blame] | 2608 | return GV; |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 2609 | } |
| 2610 | |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 2611 | /// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant |
| 2612 | /// array for the given ObjCEncodeExpr node. |
| 2613 | llvm::Constant * |
| 2614 | CodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { |
| 2615 | std::string Str; |
| 2616 | getContext().getObjCEncodingForType(E->getEncodedType(), Str); |
Eli Friedman | a210f35 | 2009-03-07 20:17:55 +0000 | [diff] [blame] | 2617 | |
| 2618 | return GetAddrOfConstantCString(Str); |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 2619 | } |
| 2620 | |
| 2621 | |
Chris Lattner | a7ad98f | 2008-02-11 00:02:17 +0000 | [diff] [blame] | 2622 | /// GenerateWritableString -- Creates storage for a string literal. |
John McCall | a5e19c6 | 2011-08-04 01:03:22 +0000 | [diff] [blame] | 2623 | static llvm::GlobalVariable *GenerateStringLiteral(StringRef str, |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 2624 | bool constant, |
Daniel Dunbar | 5fabf9d | 2008-10-17 21:56:50 +0000 | [diff] [blame] | 2625 | CodeGenModule &CGM, |
John McCall | a5e19c6 | 2011-08-04 01:03:22 +0000 | [diff] [blame] | 2626 | const char *GlobalName, |
| 2627 | unsigned Alignment) { |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 2628 | // Create Constant for this string literal. Don't add a '\0'. |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 2629 | llvm::Constant *C = |
Chris Lattner | 9401069 | 2012-02-05 02:30:40 +0000 | [diff] [blame] | 2630 | llvm::ConstantDataArray::getString(CGM.getLLVMContext(), str, false); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2631 | |
Joey Gouly | 758c4d8 | 2013-11-14 18:26:10 +0000 | [diff] [blame] | 2632 | // OpenCL v1.1 s6.5.3: a string literal is in the constant address space. |
| 2633 | unsigned AddrSpace = 0; |
| 2634 | if (CGM.getLangOpts().OpenCL) |
| 2635 | AddrSpace = CGM.getContext().getTargetAddressSpace(LangAS::opencl_constant); |
| 2636 | |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 2637 | // Create a global variable for this string |
Joey Gouly | 758c4d8 | 2013-11-14 18:26:10 +0000 | [diff] [blame] | 2638 | llvm::GlobalVariable *GV = new llvm::GlobalVariable( |
| 2639 | CGM.getModule(), C->getType(), constant, |
| 2640 | llvm::GlobalValue::PrivateLinkage, C, GlobalName, 0, |
| 2641 | llvm::GlobalVariable::NotThreadLocal, AddrSpace); |
John McCall | a5e19c6 | 2011-08-04 01:03:22 +0000 | [diff] [blame] | 2642 | GV->setAlignment(Alignment); |
Rafael Espindola | 1257bc6 | 2011-01-10 22:34:03 +0000 | [diff] [blame] | 2643 | GV->setUnnamedAddr(true); |
| 2644 | return GV; |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 2645 | } |
| 2646 | |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 2647 | /// GetAddrOfConstantString - Returns a pointer to a character array |
| 2648 | /// containing the literal. This contents are exactly that of the |
| 2649 | /// given string, i.e. it will not be null terminated automatically; |
| 2650 | /// see GetAddrOfConstantCString. Note that whether the result is |
| 2651 | /// actually a pointer to an LLVM constant depends on |
| 2652 | /// Feature.WriteableStrings. |
| 2653 | /// |
| 2654 | /// The result has pointer to array type. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2655 | llvm::Constant *CodeGenModule::GetAddrOfConstantString(StringRef Str, |
John McCall | a5e19c6 | 2011-08-04 01:03:22 +0000 | [diff] [blame] | 2656 | const char *GlobalName, |
| 2657 | unsigned Alignment) { |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 2658 | // Get the default prefix if a name wasn't specified. |
| 2659 | if (!GlobalName) |
Chris Lattner | 95b851e | 2009-07-16 05:03:48 +0000 | [diff] [blame] | 2660 | GlobalName = ".str"; |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 2661 | |
Ulrich Weigand | 6b20351 | 2013-05-06 16:23:57 +0000 | [diff] [blame] | 2662 | if (Alignment == 0) |
| 2663 | Alignment = getContext().getAlignOfGlobalVarInChars(getContext().CharTy) |
| 2664 | .getQuantity(); |
| 2665 | |
Daniel Dunbar | 8e5c2b8 | 2009-03-31 23:42:16 +0000 | [diff] [blame] | 2666 | // Don't share any string literals if strings aren't constant. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2667 | if (LangOpts.WritableStrings) |
John McCall | a5e19c6 | 2011-08-04 01:03:22 +0000 | [diff] [blame] | 2668 | return GenerateStringLiteral(Str, false, *this, GlobalName, Alignment); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2669 | |
John McCall | a5e19c6 | 2011-08-04 01:03:22 +0000 | [diff] [blame] | 2670 | llvm::StringMapEntry<llvm::GlobalVariable *> &Entry = |
Benjamin Kramer | 9de4342 | 2011-03-05 13:45:23 +0000 | [diff] [blame] | 2671 | ConstantStringMap.GetOrCreateValue(Str); |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 2672 | |
John McCall | a5e19c6 | 2011-08-04 01:03:22 +0000 | [diff] [blame] | 2673 | if (llvm::GlobalVariable *GV = Entry.getValue()) { |
| 2674 | if (Alignment > GV->getAlignment()) { |
| 2675 | GV->setAlignment(Alignment); |
| 2676 | } |
| 2677 | return GV; |
| 2678 | } |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 2679 | |
| 2680 | // Create a global variable for this. |
Chris Lattner | 812234b | 2012-02-06 22:47:00 +0000 | [diff] [blame] | 2681 | llvm::GlobalVariable *GV = GenerateStringLiteral(Str, true, *this, GlobalName, |
| 2682 | Alignment); |
John McCall | a5e19c6 | 2011-08-04 01:03:22 +0000 | [diff] [blame] | 2683 | Entry.setValue(GV); |
| 2684 | return GV; |
Chris Lattner | 45e8cbd | 2007-11-28 05:34:05 +0000 | [diff] [blame] | 2685 | } |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 2686 | |
| 2687 | /// GetAddrOfConstantCString - Returns a pointer to a character |
Benjamin Kramer | 9de4342 | 2011-03-05 13:45:23 +0000 | [diff] [blame] | 2688 | /// array containing the literal and a terminating '\0' |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 2689 | /// character. The result has pointer to array type. |
Benjamin Kramer | 9de4342 | 2011-03-05 13:45:23 +0000 | [diff] [blame] | 2690 | llvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &Str, |
John McCall | a5e19c6 | 2011-08-04 01:03:22 +0000 | [diff] [blame] | 2691 | const char *GlobalName, |
| 2692 | unsigned Alignment) { |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2693 | StringRef StrWithNull(Str.c_str(), Str.size() + 1); |
John McCall | a5e19c6 | 2011-08-04 01:03:22 +0000 | [diff] [blame] | 2694 | return GetAddrOfConstantString(StrWithNull, GlobalName, Alignment); |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 2695 | } |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2696 | |
Richard Smith | 211c8dd | 2013-06-05 00:46:14 +0000 | [diff] [blame] | 2697 | llvm::Constant *CodeGenModule::GetAddrOfGlobalTemporary( |
Richard Smith | 3282b84 | 2013-06-14 03:07:01 +0000 | [diff] [blame] | 2698 | const MaterializeTemporaryExpr *E, const Expr *Init) { |
Richard Smith | 211c8dd | 2013-06-05 00:46:14 +0000 | [diff] [blame] | 2699 | assert((E->getStorageDuration() == SD_Static || |
| 2700 | E->getStorageDuration() == SD_Thread) && "not a global temporary"); |
| 2701 | const VarDecl *VD = cast<VarDecl>(E->getExtendingDecl()); |
| 2702 | |
| 2703 | // If we're not materializing a subobject of the temporary, keep the |
| 2704 | // cv-qualifiers from the type of the MaterializeTemporaryExpr. |
Richard Smith | 3282b84 | 2013-06-14 03:07:01 +0000 | [diff] [blame] | 2705 | QualType MaterializedType = Init->getType(); |
| 2706 | if (Init == E->GetTemporaryExpr()) |
| 2707 | MaterializedType = E->getType(); |
Richard Smith | 211c8dd | 2013-06-05 00:46:14 +0000 | [diff] [blame] | 2708 | |
| 2709 | llvm::Constant *&Slot = MaterializedGlobalTemporaryMap[E]; |
| 2710 | if (Slot) |
| 2711 | return Slot; |
| 2712 | |
| 2713 | // FIXME: If an externally-visible declaration extends multiple temporaries, |
| 2714 | // we need to give each temporary the same name in every translation unit (and |
| 2715 | // we also need to make the temporaries externally-visible). |
| 2716 | SmallString<256> Name; |
| 2717 | llvm::raw_svector_ostream Out(Name); |
| 2718 | getCXXABI().getMangleContext().mangleReferenceTemporary(VD, Out); |
| 2719 | Out.flush(); |
| 2720 | |
Richard Smith | 211c8dd | 2013-06-05 00:46:14 +0000 | [diff] [blame] | 2721 | APValue *Value = 0; |
| 2722 | if (E->getStorageDuration() == SD_Static) { |
Richard Smith | 3282b84 | 2013-06-14 03:07:01 +0000 | [diff] [blame] | 2723 | // We might have a cached constant initializer for this temporary. Note |
| 2724 | // that this might have a different value from the value computed by |
| 2725 | // evaluating the initializer if the surrounding constant expression |
| 2726 | // modifies the temporary. |
Richard Smith | 211c8dd | 2013-06-05 00:46:14 +0000 | [diff] [blame] | 2727 | Value = getContext().getMaterializedTemporaryValue(E, false); |
| 2728 | if (Value && Value->isUninit()) |
| 2729 | Value = 0; |
| 2730 | } |
| 2731 | |
Richard Smith | 3282b84 | 2013-06-14 03:07:01 +0000 | [diff] [blame] | 2732 | // Try evaluating it now, it might have a constant initializer. |
| 2733 | Expr::EvalResult EvalResult; |
| 2734 | if (!Value && Init->EvaluateAsRValue(EvalResult, getContext()) && |
| 2735 | !EvalResult.hasSideEffects()) |
| 2736 | Value = &EvalResult.Val; |
| 2737 | |
| 2738 | llvm::Constant *InitialValue = 0; |
| 2739 | bool Constant = false; |
| 2740 | llvm::Type *Type; |
Richard Smith | 211c8dd | 2013-06-05 00:46:14 +0000 | [diff] [blame] | 2741 | if (Value) { |
| 2742 | // The temporary has a constant initializer, use it. |
Richard Smith | 3282b84 | 2013-06-14 03:07:01 +0000 | [diff] [blame] | 2743 | InitialValue = EmitConstantValue(*Value, MaterializedType, 0); |
| 2744 | Constant = isTypeConstant(MaterializedType, /*ExcludeCtor*/Value); |
| 2745 | Type = InitialValue->getType(); |
Richard Smith | 211c8dd | 2013-06-05 00:46:14 +0000 | [diff] [blame] | 2746 | } else { |
Richard Smith | 3282b84 | 2013-06-14 03:07:01 +0000 | [diff] [blame] | 2747 | // No initializer, the initialization will be provided when we |
Richard Smith | 211c8dd | 2013-06-05 00:46:14 +0000 | [diff] [blame] | 2748 | // initialize the declaration which performed lifetime extension. |
Richard Smith | 3282b84 | 2013-06-14 03:07:01 +0000 | [diff] [blame] | 2749 | Type = getTypes().ConvertTypeForMem(MaterializedType); |
Richard Smith | 211c8dd | 2013-06-05 00:46:14 +0000 | [diff] [blame] | 2750 | } |
| 2751 | |
| 2752 | // Create a global variable for this lifetime-extended temporary. |
| 2753 | llvm::GlobalVariable *GV = |
Richard Smith | 3282b84 | 2013-06-14 03:07:01 +0000 | [diff] [blame] | 2754 | new llvm::GlobalVariable(getModule(), Type, Constant, |
| 2755 | llvm::GlobalValue::PrivateLinkage, |
| 2756 | InitialValue, Name.c_str()); |
Richard Smith | 211c8dd | 2013-06-05 00:46:14 +0000 | [diff] [blame] | 2757 | GV->setAlignment( |
Richard Smith | 3282b84 | 2013-06-14 03:07:01 +0000 | [diff] [blame] | 2758 | getContext().getTypeAlignInChars(MaterializedType).getQuantity()); |
Richard Smith | 211c8dd | 2013-06-05 00:46:14 +0000 | [diff] [blame] | 2759 | if (VD->getTLSKind()) |
| 2760 | setTLSMode(GV, *VD); |
| 2761 | Slot = GV; |
| 2762 | return GV; |
| 2763 | } |
| 2764 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 2765 | /// EmitObjCPropertyImplementations - Emit information for synthesized |
| 2766 | /// properties for an implementation. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2767 | void CodeGenModule::EmitObjCPropertyImplementations(const |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 2768 | ObjCImplementationDecl *D) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2769 | for (ObjCImplementationDecl::propimpl_iterator |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 2770 | i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { |
David Blaikie | 581deb3 | 2012-06-06 20:45:41 +0000 | [diff] [blame] | 2771 | ObjCPropertyImplDecl *PID = *i; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2772 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 2773 | // Dynamic is just for type-checking. |
| 2774 | if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { |
| 2775 | ObjCPropertyDecl *PD = PID->getPropertyDecl(); |
| 2776 | |
| 2777 | // Determine which methods need to be implemented, some may have |
Jordan Rose | 1e4691b | 2012-10-10 16:42:25 +0000 | [diff] [blame] | 2778 | // been overridden. Note that ::isPropertyAccessor is not the method |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 2779 | // we want, that just indicates if the decl came from a |
| 2780 | // property. What we want to know is if the method is defined in |
| 2781 | // this implementation. |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 2782 | if (!D->getInstanceMethod(PD->getGetterName())) |
Fariborz Jahanian | fef30b5 | 2008-12-09 20:23:04 +0000 | [diff] [blame] | 2783 | CodeGenFunction(*this).GenerateObjCGetter( |
| 2784 | const_cast<ObjCImplementationDecl *>(D), PID); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 2785 | if (!PD->isReadOnly() && |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 2786 | !D->getInstanceMethod(PD->getSetterName())) |
Fariborz Jahanian | fef30b5 | 2008-12-09 20:23:04 +0000 | [diff] [blame] | 2787 | CodeGenFunction(*this).GenerateObjCSetter( |
| 2788 | const_cast<ObjCImplementationDecl *>(D), PID); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 2789 | } |
| 2790 | } |
| 2791 | } |
| 2792 | |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 2793 | static bool needsDestructMethod(ObjCImplementationDecl *impl) { |
Jordy Rose | db8264e | 2011-07-22 02:08:32 +0000 | [diff] [blame] | 2794 | const ObjCInterfaceDecl *iface = impl->getClassInterface(); |
| 2795 | for (const ObjCIvarDecl *ivar = iface->all_declared_ivar_begin(); |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 2796 | ivar; ivar = ivar->getNextIvar()) |
| 2797 | if (ivar->getType().isDestructedType()) |
| 2798 | return true; |
| 2799 | |
| 2800 | return false; |
| 2801 | } |
| 2802 | |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 2803 | /// EmitObjCIvarInitializations - Emit information for ivar initialization |
| 2804 | /// for an implementation. |
| 2805 | void CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 2806 | // We might need a .cxx_destruct even if we don't have any ivar initializers. |
| 2807 | if (needsDestructMethod(D)) { |
| 2808 | IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); |
| 2809 | Selector cxxSelector = getContext().Selectors.getSelector(0, &II); |
| 2810 | ObjCMethodDecl *DTORMethod = |
| 2811 | ObjCMethodDecl::Create(getContext(), D->getLocation(), D->getLocation(), |
Argyrios Kyrtzidis | 75cf3e8 | 2011-08-17 19:25:08 +0000 | [diff] [blame] | 2812 | cxxSelector, getContext().VoidTy, 0, D, |
| 2813 | /*isInstance=*/true, /*isVariadic=*/false, |
Jordan Rose | 1e4691b | 2012-10-10 16:42:25 +0000 | [diff] [blame] | 2814 | /*isPropertyAccessor=*/true, /*isImplicitlyDeclared=*/true, |
Argyrios Kyrtzidis | 75cf3e8 | 2011-08-17 19:25:08 +0000 | [diff] [blame] | 2815 | /*isDefined=*/false, ObjCMethodDecl::Required); |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 2816 | D->addInstanceMethod(DTORMethod); |
| 2817 | CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); |
John McCall | b03527a | 2012-10-17 04:53:31 +0000 | [diff] [blame] | 2818 | D->setHasDestructors(true); |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 2819 | } |
| 2820 | |
| 2821 | // If the implementation doesn't have any ivar initializers, we don't need |
| 2822 | // a .cxx_construct. |
David Chisnall | 827bbcc | 2011-03-17 14:19:08 +0000 | [diff] [blame] | 2823 | if (D->getNumIvarInitializers() == 0) |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 2824 | return; |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 2825 | |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 2826 | IdentifierInfo *II = &getContext().Idents.get(".cxx_construct"); |
| 2827 | Selector cxxSelector = getContext().Selectors.getSelector(0, &II); |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 2828 | // The constructor returns 'self'. |
| 2829 | ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), |
| 2830 | D->getLocation(), |
Argyrios Kyrtzidis | 11d7716 | 2011-10-03 06:36:36 +0000 | [diff] [blame] | 2831 | D->getLocation(), |
Argyrios Kyrtzidis | 11d7716 | 2011-10-03 06:36:36 +0000 | [diff] [blame] | 2832 | cxxSelector, |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 2833 | getContext().getObjCIdType(), 0, |
Argyrios Kyrtzidis | 75cf3e8 | 2011-08-17 19:25:08 +0000 | [diff] [blame] | 2834 | D, /*isInstance=*/true, |
| 2835 | /*isVariadic=*/false, |
Jordan Rose | 1e4691b | 2012-10-10 16:42:25 +0000 | [diff] [blame] | 2836 | /*isPropertyAccessor=*/true, |
Argyrios Kyrtzidis | 75cf3e8 | 2011-08-17 19:25:08 +0000 | [diff] [blame] | 2837 | /*isImplicitlyDeclared=*/true, |
| 2838 | /*isDefined=*/false, |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 2839 | ObjCMethodDecl::Required); |
| 2840 | D->addInstanceMethod(CTORMethod); |
| 2841 | CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); |
John McCall | b03527a | 2012-10-17 04:53:31 +0000 | [diff] [blame] | 2842 | D->setHasNonZeroConstructors(true); |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 2843 | } |
| 2844 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 2845 | /// EmitNamespace - Emit all declarations in a namespace. |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 2846 | void CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 2847 | for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); |
David Blaikie | 0d520f7 | 2013-09-04 21:07:37 +0000 | [diff] [blame] | 2848 | I != E; ++I) { |
| 2849 | if (const VarDecl *VD = dyn_cast<VarDecl>(*I)) |
| 2850 | if (VD->getTemplateSpecializationKind() != TSK_ExplicitSpecialization && |
| 2851 | VD->getTemplateSpecializationKind() != TSK_Undeclared) |
| 2852 | continue; |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 2853 | EmitTopLevelDecl(*I); |
David Blaikie | 0d520f7 | 2013-09-04 21:07:37 +0000 | [diff] [blame] | 2854 | } |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 2855 | } |
| 2856 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 2857 | // EmitLinkageSpec - Emit all declarations in a linkage spec. |
| 2858 | void CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { |
Eli Friedman | f976be8 | 2009-08-01 20:48:04 +0000 | [diff] [blame] | 2859 | if (LSD->getLanguage() != LinkageSpecDecl::lang_c && |
| 2860 | LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 2861 | ErrorUnsupported(LSD, "linkage spec"); |
| 2862 | return; |
| 2863 | } |
| 2864 | |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 2865 | for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); |
Fariborz Jahanian | c1868e5 | 2012-10-26 20:22:11 +0000 | [diff] [blame] | 2866 | I != E; ++I) { |
Fariborz Jahanian | 107dae4 | 2012-10-26 22:20:25 +0000 | [diff] [blame] | 2867 | // Meta-data for ObjC class includes references to implemented methods. |
| 2868 | // Generate class's method definitions first. |
Fariborz Jahanian | c1868e5 | 2012-10-26 20:22:11 +0000 | [diff] [blame] | 2869 | if (ObjCImplDecl *OID = dyn_cast<ObjCImplDecl>(*I)) { |
| 2870 | for (ObjCContainerDecl::method_iterator M = OID->meth_begin(), |
| 2871 | MEnd = OID->meth_end(); |
| 2872 | M != MEnd; ++M) |
| 2873 | EmitTopLevelDecl(*M); |
| 2874 | } |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 2875 | EmitTopLevelDecl(*I); |
Fariborz Jahanian | c1868e5 | 2012-10-26 20:22:11 +0000 | [diff] [blame] | 2876 | } |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 2877 | } |
| 2878 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2879 | /// EmitTopLevelDecl - Emit code for a single top level declaration. |
| 2880 | void CodeGenModule::EmitTopLevelDecl(Decl *D) { |
Douglas Gregor | 16e8be2 | 2009-06-29 17:30:29 +0000 | [diff] [blame] | 2881 | // Ignore dependent declarations. |
| 2882 | if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) |
| 2883 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2884 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2885 | switch (D->getKind()) { |
Anders Carlsson | 293361a | 2009-08-25 13:14:46 +0000 | [diff] [blame] | 2886 | case Decl::CXXConversion: |
Anders Carlsson | 2b77ba8 | 2009-04-04 20:47:02 +0000 | [diff] [blame] | 2887 | case Decl::CXXMethod: |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2888 | case Decl::Function: |
Douglas Gregor | 16e8be2 | 2009-06-29 17:30:29 +0000 | [diff] [blame] | 2889 | // Skip function templates |
Francois Pichet | 8387e2a | 2011-04-22 22:18:13 +0000 | [diff] [blame] | 2890 | if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() || |
| 2891 | cast<FunctionDecl>(D)->isLateTemplateParsed()) |
Douglas Gregor | 16e8be2 | 2009-06-29 17:30:29 +0000 | [diff] [blame] | 2892 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2893 | |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 2894 | EmitGlobal(cast<FunctionDecl>(D)); |
| 2895 | break; |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2896 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2897 | case Decl::Var: |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2898 | // Skip variable templates |
| 2899 | if (cast<VarDecl>(D)->getDescribedVarTemplate()) |
| 2900 | return; |
| 2901 | case Decl::VarTemplateSpecialization: |
Anders Carlsson | 555b4bb | 2009-09-10 23:43:36 +0000 | [diff] [blame] | 2902 | EmitGlobal(cast<VarDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2903 | break; |
| 2904 | |
John McCall | 26fbc72 | 2011-04-12 01:01:22 +0000 | [diff] [blame] | 2905 | // Indirect fields from global anonymous structs and unions can be |
| 2906 | // ignored; only the actual variable requires IR gen support. |
| 2907 | case Decl::IndirectField: |
| 2908 | break; |
| 2909 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 2910 | // C++ Decls |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2911 | case Decl::Namespace: |
Anders Carlsson | 984e068 | 2009-04-01 00:58:25 +0000 | [diff] [blame] | 2912 | EmitNamespace(cast<NamespaceDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2913 | break; |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 2914 | // No code generation needed. |
John McCall | 9d0c661 | 2009-11-17 09:33:40 +0000 | [diff] [blame] | 2915 | case Decl::UsingShadow: |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 2916 | case Decl::Using: |
Douglas Gregor | 127102b | 2009-06-29 20:59:39 +0000 | [diff] [blame] | 2917 | case Decl::ClassTemplate: |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2918 | case Decl::VarTemplate: |
| 2919 | case Decl::VarTemplatePartialSpecialization: |
Douglas Gregor | 127102b | 2009-06-29 20:59:39 +0000 | [diff] [blame] | 2920 | case Decl::FunctionTemplate: |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 2921 | case Decl::TypeAliasTemplate: |
Douglas Gregor | 6a576ab | 2011-06-05 05:04:23 +0000 | [diff] [blame] | 2922 | case Decl::Block: |
Michael Han | 684aa73 | 2013-02-22 17:15:32 +0000 | [diff] [blame] | 2923 | case Decl::Empty: |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 2924 | break; |
David Blaikie | fc46ebc | 2013-05-20 22:50:41 +0000 | [diff] [blame] | 2925 | case Decl::NamespaceAlias: |
| 2926 | if (CGDebugInfo *DI = getModuleDebugInfo()) |
| 2927 | DI->EmitNamespaceAlias(cast<NamespaceAliasDecl>(*D)); |
| 2928 | return; |
David Blaikie | 1601a4a | 2013-04-26 05:41:06 +0000 | [diff] [blame] | 2929 | case Decl::UsingDirective: // using namespace X; [C++] |
| 2930 | if (CGDebugInfo *DI = getModuleDebugInfo()) |
| 2931 | DI->EmitUsingDirective(cast<UsingDirectiveDecl>(*D)); |
| 2932 | return; |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 2933 | case Decl::CXXConstructor: |
Anders Carlsson | 1fe598c | 2009-11-24 05:16:24 +0000 | [diff] [blame] | 2934 | // Skip function templates |
Francois Pichet | 8387e2a | 2011-04-22 22:18:13 +0000 | [diff] [blame] | 2935 | if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() || |
| 2936 | cast<FunctionDecl>(D)->isLateTemplateParsed()) |
Anders Carlsson | 1fe598c | 2009-11-24 05:16:24 +0000 | [diff] [blame] | 2937 | return; |
| 2938 | |
Timur Iskhodzhanov | bb1b797 | 2013-08-04 17:30:04 +0000 | [diff] [blame] | 2939 | getCXXABI().EmitCXXConstructors(cast<CXXConstructorDecl>(D)); |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 2940 | break; |
Anders Carlsson | 27ae536 | 2009-04-17 01:58:57 +0000 | [diff] [blame] | 2941 | case Decl::CXXDestructor: |
Francois Pichet | 8387e2a | 2011-04-22 22:18:13 +0000 | [diff] [blame] | 2942 | if (cast<FunctionDecl>(D)->isLateTemplateParsed()) |
| 2943 | return; |
Reid Kleckner | a4130ba | 2013-07-22 13:51:44 +0000 | [diff] [blame] | 2944 | getCXXABI().EmitCXXDestructors(cast<CXXDestructorDecl>(D)); |
Anders Carlsson | 27ae536 | 2009-04-17 01:58:57 +0000 | [diff] [blame] | 2945 | break; |
Anders Carlsson | 36674d2 | 2009-06-11 21:22:55 +0000 | [diff] [blame] | 2946 | |
| 2947 | case Decl::StaticAssert: |
| 2948 | // Nothing to do. |
| 2949 | break; |
| 2950 | |
Anders Carlsson | 95d4e5d | 2009-04-15 15:55:24 +0000 | [diff] [blame] | 2951 | // Objective-C Decls |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2952 | |
Fariborz Jahanian | 38e24c7 | 2009-03-18 22:33:24 +0000 | [diff] [blame] | 2953 | // Forward declarations, no (immediate) code generation. |
Chris Lattner | 285d0db | 2009-04-01 02:36:43 +0000 | [diff] [blame] | 2954 | case Decl::ObjCInterface: |
Eric Christopher | ffb0c3a | 2012-07-19 22:22:55 +0000 | [diff] [blame] | 2955 | case Decl::ObjCCategory: |
Chris Lattner | 285d0db | 2009-04-01 02:36:43 +0000 | [diff] [blame] | 2956 | break; |
| 2957 | |
Douglas Gregor | bd9482d | 2012-01-01 21:23:57 +0000 | [diff] [blame] | 2958 | case Decl::ObjCProtocol: { |
| 2959 | ObjCProtocolDecl *Proto = cast<ObjCProtocolDecl>(D); |
| 2960 | if (Proto->isThisDeclarationADefinition()) |
| 2961 | ObjCRuntime->GenerateProtocol(Proto); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2962 | break; |
Douglas Gregor | bd9482d | 2012-01-01 21:23:57 +0000 | [diff] [blame] | 2963 | } |
| 2964 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2965 | case Decl::ObjCCategoryImpl: |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 2966 | // Categories have properties but don't support synthesize so we |
| 2967 | // can ignore them here. |
Peter Collingbourne | e926523 | 2011-07-27 20:29:46 +0000 | [diff] [blame] | 2968 | ObjCRuntime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2969 | break; |
| 2970 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 2971 | case Decl::ObjCImplementation: { |
| 2972 | ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); |
| 2973 | EmitObjCPropertyImplementations(OMD); |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 2974 | EmitObjCIvarInitializations(OMD); |
Peter Collingbourne | e926523 | 2011-07-27 20:29:46 +0000 | [diff] [blame] | 2975 | ObjCRuntime->GenerateClass(OMD); |
Eric Christopher | be6c686 | 2012-04-11 05:56:05 +0000 | [diff] [blame] | 2976 | // Emit global variable debug information. |
| 2977 | if (CGDebugInfo *DI = getModuleDebugInfo()) |
Alexey Samsonov | 96a6639 | 2012-12-03 18:28:12 +0000 | [diff] [blame] | 2978 | if (getCodeGenOpts().getDebugInfo() >= CodeGenOptions::LimitedDebugInfo) |
| 2979 | DI->getOrCreateInterfaceType(getContext().getObjCInterfaceType( |
| 2980 | OMD->getClassInterface()), OMD->getLocation()); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2981 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2982 | } |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2983 | case Decl::ObjCMethod: { |
| 2984 | ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); |
| 2985 | // If this is not a prototype, emit the body. |
Argyrios Kyrtzidis | 6fb0aee | 2009-06-30 02:35:26 +0000 | [diff] [blame] | 2986 | if (OMD->getBody()) |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2987 | CodeGenFunction(*this).GenerateObjCMethod(OMD); |
| 2988 | break; |
| 2989 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2990 | case Decl::ObjCCompatibleAlias: |
David Chisnall | 29254f4 | 2012-01-31 18:59:20 +0000 | [diff] [blame] | 2991 | ObjCRuntime->RegisterAlias(cast<ObjCCompatibleAliasDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2992 | break; |
| 2993 | |
Anders Carlsson | 91e20dd | 2009-04-02 05:55:18 +0000 | [diff] [blame] | 2994 | case Decl::LinkageSpec: |
| 2995 | EmitLinkageSpec(cast<LinkageSpecDecl>(D)); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2996 | break; |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 2997 | |
| 2998 | case Decl::FileScopeAsm: { |
| 2999 | FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 3000 | StringRef AsmString = AD->getAsmString()->getString(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3001 | |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 3002 | const std::string &S = getModule().getModuleInlineAsm(); |
| 3003 | if (S.empty()) |
| 3004 | getModule().setModuleInlineAsm(AsmString); |
Joerg Sonnenberger | 8ce9cca | 2012-08-10 10:57:52 +0000 | [diff] [blame] | 3005 | else if (S.end()[-1] == '\n') |
Chris Lattner | 9f5bff0 | 2011-07-23 20:04:25 +0000 | [diff] [blame] | 3006 | getModule().setModuleInlineAsm(S + AsmString.str()); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 3007 | else |
Benjamin Kramer | 8d04258 | 2009-12-11 13:33:18 +0000 | [diff] [blame] | 3008 | getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 3009 | break; |
| 3010 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3011 | |
Douglas Gregor | b6cbe51 | 2013-01-14 17:21:00 +0000 | [diff] [blame] | 3012 | case Decl::Import: { |
| 3013 | ImportDecl *Import = cast<ImportDecl>(D); |
| 3014 | |
| 3015 | // Ignore import declarations that come from imported modules. |
| 3016 | if (clang::Module *Owner = Import->getOwningModule()) { |
| 3017 | if (getLangOpts().CurrentModule.empty() || |
| 3018 | Owner->getTopLevelModule()->Name == getLangOpts().CurrentModule) |
| 3019 | break; |
| 3020 | } |
| 3021 | |
Douglas Gregor | 858afb3 | 2013-01-14 20:53:57 +0000 | [diff] [blame] | 3022 | ImportedModules.insert(Import->getImportedModule()); |
Douglas Gregor | b6cbe51 | 2013-01-14 17:21:00 +0000 | [diff] [blame] | 3023 | break; |
| 3024 | } |
| 3025 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3026 | default: |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 3027 | // Make sure we handled everything we should, every other kind is a |
| 3028 | // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind |
| 3029 | // function. Need to recode Decl::Kind to do that easily. |
Daniel Dunbar | 41071de | 2008-08-15 23:26:23 +0000 | [diff] [blame] | 3030 | assert(isa<TypeDecl>(D) && "Unsupported decl kind"); |
| 3031 | } |
| 3032 | } |
John McCall | 744016d | 2010-07-06 23:57:41 +0000 | [diff] [blame] | 3033 | |
| 3034 | /// Turns the given pointer into a constant. |
| 3035 | static llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, |
| 3036 | const void *Ptr) { |
| 3037 | uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 3038 | llvm::Type *i64 = llvm::Type::getInt64Ty(Context); |
John McCall | 744016d | 2010-07-06 23:57:41 +0000 | [diff] [blame] | 3039 | return llvm::ConstantInt::get(i64, PtrInt); |
| 3040 | } |
| 3041 | |
| 3042 | static void EmitGlobalDeclMetadata(CodeGenModule &CGM, |
| 3043 | llvm::NamedMDNode *&GlobalMetadata, |
| 3044 | GlobalDecl D, |
| 3045 | llvm::GlobalValue *Addr) { |
| 3046 | if (!GlobalMetadata) |
| 3047 | GlobalMetadata = |
| 3048 | CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); |
| 3049 | |
| 3050 | // TODO: should we report variant information for ctors/dtors? |
| 3051 | llvm::Value *Ops[] = { |
| 3052 | Addr, |
| 3053 | GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) |
| 3054 | }; |
Jay Foad | 6f14165 | 2011-04-21 19:59:12 +0000 | [diff] [blame] | 3055 | GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops)); |
John McCall | 744016d | 2010-07-06 23:57:41 +0000 | [diff] [blame] | 3056 | } |
| 3057 | |
Richard Smith | 0024937 | 2013-04-06 05:00:46 +0000 | [diff] [blame] | 3058 | /// For each function which is declared within an extern "C" region and marked |
| 3059 | /// as 'used', but has internal linkage, create an alias from the unmangled |
| 3060 | /// name to the mangled name if possible. People expect to be able to refer |
| 3061 | /// to such functions with an unmangled name from inline assembly within the |
| 3062 | /// same translation unit. |
| 3063 | void CodeGenModule::EmitStaticExternCAliases() { |
Richard Smith | 84083b7 | 2013-04-13 01:28:18 +0000 | [diff] [blame] | 3064 | for (StaticExternCMap::iterator I = StaticExternCValues.begin(), |
| 3065 | E = StaticExternCValues.end(); |
| 3066 | I != E; ++I) { |
| 3067 | IdentifierInfo *Name = I->first; |
| 3068 | llvm::GlobalValue *Val = I->second; |
Richard Smith | 6797204 | 2013-04-06 07:07:44 +0000 | [diff] [blame] | 3069 | if (Val && !getModule().getNamedValue(Name->getName())) |
| 3070 | AddUsedGlobal(new llvm::GlobalAlias(Val->getType(), Val->getLinkage(), |
| 3071 | Name->getName(), Val, &getModule())); |
| 3072 | } |
Richard Smith | 0024937 | 2013-04-06 05:00:46 +0000 | [diff] [blame] | 3073 | } |
| 3074 | |
John McCall | 744016d | 2010-07-06 23:57:41 +0000 | [diff] [blame] | 3075 | /// Emits metadata nodes associating all the global values in the |
| 3076 | /// current module with the Decls they came from. This is useful for |
| 3077 | /// projects using IR gen as a subroutine. |
| 3078 | /// |
| 3079 | /// Since there's currently no way to associate an MDNode directly |
| 3080 | /// with an llvm::GlobalValue, we create a global named metadata |
| 3081 | /// with the name 'clang.global.decl.ptrs'. |
| 3082 | void CodeGenModule::EmitDeclMetadata() { |
| 3083 | llvm::NamedMDNode *GlobalMetadata = 0; |
| 3084 | |
| 3085 | // StaticLocalDeclMap |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 3086 | for (llvm::DenseMap<GlobalDecl,StringRef>::iterator |
John McCall | 744016d | 2010-07-06 23:57:41 +0000 | [diff] [blame] | 3087 | I = MangledDeclNames.begin(), E = MangledDeclNames.end(); |
| 3088 | I != E; ++I) { |
| 3089 | llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); |
| 3090 | EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); |
| 3091 | } |
| 3092 | } |
| 3093 | |
| 3094 | /// Emits metadata nodes for all the local variables in the current |
| 3095 | /// function. |
| 3096 | void CodeGenFunction::EmitDeclMetadata() { |
| 3097 | if (LocalDeclMap.empty()) return; |
| 3098 | |
| 3099 | llvm::LLVMContext &Context = getLLVMContext(); |
| 3100 | |
| 3101 | // Find the unique metadata ID for this name. |
| 3102 | unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); |
| 3103 | |
| 3104 | llvm::NamedMDNode *GlobalMetadata = 0; |
| 3105 | |
| 3106 | for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator |
| 3107 | I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { |
| 3108 | const Decl *D = I->first; |
| 3109 | llvm::Value *Addr = I->second; |
| 3110 | |
| 3111 | if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { |
| 3112 | llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); |
Jay Foad | 6f14165 | 2011-04-21 19:59:12 +0000 | [diff] [blame] | 3113 | Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, DAddr)); |
John McCall | 744016d | 2010-07-06 23:57:41 +0000 | [diff] [blame] | 3114 | } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { |
| 3115 | GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); |
| 3116 | EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); |
| 3117 | } |
| 3118 | } |
| 3119 | } |
Daniel Dunbar | 673431a | 2010-07-16 00:00:15 +0000 | [diff] [blame] | 3120 | |
Rafael Espindola | 9686f12 | 2013-10-16 19:28:50 +0000 | [diff] [blame] | 3121 | void CodeGenModule::EmitVersionIdentMetadata() { |
| 3122 | llvm::NamedMDNode *IdentMetadata = |
| 3123 | TheModule.getOrInsertNamedMetadata("llvm.ident"); |
| 3124 | std::string Version = getClangFullVersion(); |
| 3125 | llvm::LLVMContext &Ctx = TheModule.getContext(); |
| 3126 | |
| 3127 | llvm::Value *IdentNode[] = { |
| 3128 | llvm::MDString::get(Ctx, Version) |
| 3129 | }; |
| 3130 | IdentMetadata->addOperand(llvm::MDNode::get(Ctx, IdentNode)); |
| 3131 | } |
| 3132 | |
Nick Lewycky | 3dc0541 | 2011-05-05 00:08:20 +0000 | [diff] [blame] | 3133 | void CodeGenModule::EmitCoverageFile() { |
| 3134 | if (!getCodeGenOpts().CoverageFile.empty()) { |
Nick Lewycky | 5ea4f44 | 2011-05-04 20:46:58 +0000 | [diff] [blame] | 3135 | if (llvm::NamedMDNode *CUNode = TheModule.getNamedMetadata("llvm.dbg.cu")) { |
| 3136 | llvm::NamedMDNode *GCov = TheModule.getOrInsertNamedMetadata("llvm.gcov"); |
| 3137 | llvm::LLVMContext &Ctx = TheModule.getContext(); |
Nick Lewycky | 3dc0541 | 2011-05-05 00:08:20 +0000 | [diff] [blame] | 3138 | llvm::MDString *CoverageFile = |
| 3139 | llvm::MDString::get(Ctx, getCodeGenOpts().CoverageFile); |
Nick Lewycky | 5ea4f44 | 2011-05-04 20:46:58 +0000 | [diff] [blame] | 3140 | for (int i = 0, e = CUNode->getNumOperands(); i != e; ++i) { |
| 3141 | llvm::MDNode *CU = CUNode->getOperand(i); |
Nick Lewycky | 3dc0541 | 2011-05-05 00:08:20 +0000 | [diff] [blame] | 3142 | llvm::Value *node[] = { CoverageFile, CU }; |
Nick Lewycky | 5ea4f44 | 2011-05-04 20:46:58 +0000 | [diff] [blame] | 3143 | llvm::MDNode *N = llvm::MDNode::get(Ctx, node); |
| 3144 | GCov->addOperand(N); |
| 3145 | } |
| 3146 | } |
| 3147 | } |
| 3148 | } |
Nico Weber | c5f8046 | 2012-10-11 10:13:44 +0000 | [diff] [blame] | 3149 | |
| 3150 | llvm::Constant *CodeGenModule::EmitUuidofInitializer(StringRef Uuid, |
| 3151 | QualType GuidType) { |
| 3152 | // Sema has checked that all uuid strings are of the form |
| 3153 | // "12345678-1234-1234-1234-1234567890ab". |
| 3154 | assert(Uuid.size() == 36); |
David Majnemer | 8effeda | 2013-08-15 19:59:14 +0000 | [diff] [blame] | 3155 | for (unsigned i = 0; i < 36; ++i) { |
| 3156 | if (i == 8 || i == 13 || i == 18 || i == 23) assert(Uuid[i] == '-'); |
| 3157 | else assert(isHexDigit(Uuid[i])); |
Nico Weber | c5f8046 | 2012-10-11 10:13:44 +0000 | [diff] [blame] | 3158 | } |
Nico Weber | c5f8046 | 2012-10-11 10:13:44 +0000 | [diff] [blame] | 3159 | |
David Majnemer | 8effeda | 2013-08-15 19:59:14 +0000 | [diff] [blame] | 3160 | const unsigned Field3ValueOffsets[8] = { 19, 21, 24, 26, 28, 30, 32, 34 }; |
Nico Weber | c5f8046 | 2012-10-11 10:13:44 +0000 | [diff] [blame] | 3161 | |
David Majnemer | 8effeda | 2013-08-15 19:59:14 +0000 | [diff] [blame] | 3162 | llvm::Constant *Field3[8]; |
| 3163 | for (unsigned Idx = 0; Idx < 8; ++Idx) |
| 3164 | Field3[Idx] = llvm::ConstantInt::get( |
| 3165 | Int8Ty, Uuid.substr(Field3ValueOffsets[Idx], 2), 16); |
| 3166 | |
| 3167 | llvm::Constant *Fields[4] = { |
| 3168 | llvm::ConstantInt::get(Int32Ty, Uuid.substr(0, 8), 16), |
| 3169 | llvm::ConstantInt::get(Int16Ty, Uuid.substr(9, 4), 16), |
| 3170 | llvm::ConstantInt::get(Int16Ty, Uuid.substr(14, 4), 16), |
| 3171 | llvm::ConstantArray::get(llvm::ArrayType::get(Int8Ty, 8), Field3) |
| 3172 | }; |
| 3173 | |
| 3174 | return llvm::ConstantStruct::getAnon(Fields); |
Nico Weber | c5f8046 | 2012-10-11 10:13:44 +0000 | [diff] [blame] | 3175 | } |