CodeGenModule.cpp revision 29254f4dd114fe2dd5c4e7a261ebea941973ad3d
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- CodeGenModule.cpp - Emit LLVM Code from ASTs for a Module --------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This coordinates the per-module state used while generating code. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenModule.h" 15bd3606426d389370616126af969904ec493cb105Chris Lattner#include "CGDebugInfo.h" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenFunction.h" 173d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman#include "CodeGenTBAA.h" 180dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar#include "CGCall.h" 196c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne#include "CGCUDARuntime.h" 204c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall#include "CGCXXABI.h" 21af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar#include "CGObjCRuntime.h" 228c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne#include "CGOpenCLRuntime.h" 2382d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov#include "TargetInfo.h" 2406057cef0bcd7804e80f3ce2bbe352178396c715Chandler Carruth#include "clang/Frontend/CodeGenOptions.h" 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 26687cc4a850b59116efee061018f0d8df50728b82Ken Dyck#include "clang/AST/CharUnits.h" 27c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2821ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 29af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor#include "clang/AST/DeclTemplate.h" 3014110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne#include "clang/AST/Mangle.h" 311a5e0d7f18485e4fb958f96dcddff3e4486a4069Anders Carlsson#include "clang/AST/RecordLayout.h" 32a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola#include "clang/AST/RecursiveASTVisitor.h" 33bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola#include "clang/Basic/Builtins.h" 342c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner#include "clang/Basic/Diagnostic.h" 358bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman#include "clang/Basic/SourceManager.h" 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 37e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff#include "clang/Basic/ConvertUTF.h" 38ec9426ca6039279bcc99bc2c625bb2abe4f0353dNate Begeman#include "llvm/CallingConv.h" 39bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner#include "llvm/Module.h" 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/Intrinsics.h" 41d5b8902c0329d80a216803b58dc3b689349a0c11Chris Lattner#include "llvm/LLVMContext.h" 426374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall#include "llvm/ADT/Triple.h" 43c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola#include "llvm/Target/Mangler.h" 4420ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 456ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif#include "llvm/Support/CallSite.h" 4678f7ece00e2ddfb64d4ed72a7be770b5b9b805e3Chris Lattner#include "llvm/Support/ErrorHandling.h" 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougestatic const char AnnotationSection[] = "llvm.metadata"; 5177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 52f16aa103d3afd42fbca2ab346f191bf745cec092John McCallstatic CGCXXABI &createCXXABI(CodeGenModule &CGM) { 53bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor switch (CGM.getContext().getTargetInfo().getCXXABI()) { 54f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_ARM: return *CreateARMCXXABI(CGM); 55f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_Itanium: return *CreateItaniumCXXABI(CGM); 56f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_Microsoft: return *CreateMicrosoftCXXABI(CGM); 57f16aa103d3afd42fbca2ab346f191bf745cec092John McCall } 58f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 59f16aa103d3afd42fbca2ab346f191bf745cec092John McCall llvm_unreachable("invalid C++ ABI kind"); 60f16aa103d3afd42fbca2ab346f191bf745cec092John McCall} 61f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 632811ccf48d6d898c42cc4cfad37abedb36236d20Chandler CarruthCodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, 64468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall llvm::Module &M, const llvm::TargetData &TD, 65d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie DiagnosticsEngine &diags) 66d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall : Context(C), Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), 67468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags), 68f16aa103d3afd42fbca2ab346f191bf745cec092John McCall ABI(createCXXABI(*this)), 6908d4792bb5d9e0e7f122c6273636807029c06aaaDaniel Dunbar Types(C, M, TD, getTargetCodeGenInfo().getABIInfo(), ABI, CGO), 703d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman TBAA(0), 716c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne VTables(*this), ObjCRuntime(0), OpenCLRuntime(0), CUDARuntime(0), 726c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne DebugInfo(0), ARCData(0), RRData(0), CFConstantStringClassRef(0), 736c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne ConstantStringClassRef(0), NSConstantStringType(0), 74673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar VMContext(M.getContext()), 75673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar NSConcreteGlobalBlock(0), NSConcreteStackBlock(0), 76d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall BlockObjectAssign(0), BlockObjectDispose(0), 77d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall BlockDescriptorType(0), GenericBlockLiteralType(0) { 7860be607e5d71627bf3dab8f51c3fdca74267c692David Chisnall if (Features.ObjC1) 798c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne createObjCRuntime(); 808c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne if (Features.OpenCL) 818c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne createOpenCLRuntime(); 826c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne if (Features.CUDA) 836c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne createCUDARuntime(); 84e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 853d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman // Enable TBAA unless it's suppressed. 863d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!CodeGenOpts.RelaxedAliasing && CodeGenOpts.OptimizationLevel > 0) 870b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman TBAA = new CodeGenTBAA(Context, VMContext, getLangOptions(), 880b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman ABI.getMangleContext()); 893d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 90e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky // If debug info or coverage generation is enabled, create the CGDebugInfo 91e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky // object. 92e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky if (CodeGenOpts.DebugInfo || CodeGenOpts.EmitGcovArcs || 93e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky CodeGenOpts.EmitGcovNotes) 94e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky DebugInfo = new CGDebugInfo(*this); 95d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall 96d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall Block.GlobalUniqueCount = 0; 975936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall 98f85e193739c953358c865005855253af4f68a497John McCall if (C.getLangOptions().ObjCAutoRefCount) 99f85e193739c953358c865005855253af4f68a497John McCall ARCData = new ARCEntrypoints(); 100f85e193739c953358c865005855253af4f68a497John McCall RRData = new RREntrypoints(); 101f85e193739c953358c865005855253af4f68a497John McCall 1025936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall // Initialize the type cache. 1035936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall llvm::LLVMContext &LLVMContext = M.getContext(); 1040774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall VoidTy = llvm::Type::getVoidTy(LLVMContext); 1050774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int8Ty = llvm::Type::getInt8Ty(LLVMContext); 1060774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int32Ty = llvm::Type::getInt32Ty(LLVMContext); 1070774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int64Ty = llvm::Type::getInt64Ty(LLVMContext); 108bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor PointerWidthInBits = C.getTargetInfo().getPointerWidth(0); 10934695856c0e67b3765b46304cc71b5d2cd5b71c7John McCall PointerAlignInBytes = 110bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor C.toCharUnitsFromBits(C.getTargetInfo().getPointerAlign(0)).getQuantity(); 111bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor IntTy = llvm::IntegerType::get(LLVMContext, C.getTargetInfo().getIntWidth()); 1125936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall IntPtrTy = llvm::IntegerType::get(LLVMContext, PointerWidthInBits); 1135936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8PtrTy = Int8Ty->getPointerTo(0); 1145936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8PtrPtrTy = Int8PtrTy->getPointerTo(0); 1152b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 1162b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 1172b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 118e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne delete ObjCRuntime; 1198c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne delete OpenCLRuntime; 1206c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne delete CUDARuntime; 1210628b724ff68105dc88af00a39f859447f22981eTed Kremenek delete TheTargetCodeGenInfo; 122f16aa103d3afd42fbca2ab346f191bf745cec092John McCall delete &ABI; 1234376c85fb0ac9e7fd779d246efc77e1169179138Dan Gohman delete TBAA; 124815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 125f85e193739c953358c865005855253af4f68a497John McCall delete ARCData; 126f85e193739c953358c865005855253af4f68a497John McCall delete RRData; 127815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 128815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 1290d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnallvoid CodeGenModule::createObjCRuntime() { 1300d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall if (!Features.NeXTRuntime) 131e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime = CreateGNUObjCRuntime(*this); 1320d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else 133e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime = CreateMacObjCRuntime(*this); 1340d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall} 1350d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall 1368c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbournevoid CodeGenModule::createOpenCLRuntime() { 1378c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne OpenCLRuntime = new CGOpenCLRuntime(*this); 1388c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne} 1398c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne 1406c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbournevoid CodeGenModule::createCUDARuntime() { 1416c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne CUDARuntime = CreateNVCUDARuntime(*this); 1426c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne} 1436c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne 144815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 14582227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 1466c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalInitFunc(); 147efb0fa9e11f75af51744a6159530ef7cc8efa24aDaniel Dunbar EmitCXXGlobalDtorFunc(); 148e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne if (ObjCRuntime) 149e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne if (llvm::Function *ObjCInitFunction = ObjCRuntime->ModuleInitFunction()) 150208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 1516bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 1526bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 15377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge EmitGlobalAnnotations(); 1540269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 155744016dde06fcffd50931e94a98c850f8b12cd87John McCall 156b25938303de0976b9f189363d43033e5788e3d36John McCall SimplifyPersonality(); 157b25938303de0976b9f189363d43033e5788e3d36John McCall 158744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (getCodeGenOpts().EmitDeclMetadata) 159744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitDeclMetadata(); 1605ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky 1615ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky if (getCodeGenOpts().EmitGcovArcs || getCodeGenOpts().EmitGcovNotes) 1623dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky EmitCoverageFile(); 163f391dbe39dca85f2a2c6ea558811dacc571c223eDevang Patel 164f391dbe39dca85f2a2c6ea558811dacc571c223eDevang Patel if (DebugInfo) 165f391dbe39dca85f2a2c6ea558811dacc571c223eDevang Patel DebugInfo->finalize(); 166f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 167f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 168e80d56771736c85fd8365c394a6731923b17e91dDevang Patelvoid CodeGenModule::UpdateCompletedType(const TagDecl *TD) { 169e80d56771736c85fd8365c394a6731923b17e91dDevang Patel // Make sure that this type is translated. 170e80d56771736c85fd8365c394a6731923b17e91dDevang Patel Types.UpdateCompletedType(TD); 171e80d56771736c85fd8365c394a6731923b17e91dDevang Patel if (DebugInfo) 172e80d56771736c85fd8365c394a6731923b17e91dDevang Patel DebugInfo->UpdateCompletedType(TD); 173e80d56771736c85fd8365c394a6731923b17e91dDevang Patel} 174e80d56771736c85fd8365c394a6731923b17e91dDevang Patel 1753d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanllvm::MDNode *CodeGenModule::getTBAAInfo(QualType QTy) { 1763d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!TBAA) 1773d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return 0; 1783d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return TBAA->getTBAAInfo(QTy); 1793d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1803d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1813d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanvoid CodeGenModule::DecorateInstruction(llvm::Instruction *Inst, 1823d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman llvm::MDNode *TBAAInfo) { 1833d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman Inst->setMetadata(llvm::LLVMContext::MD_tbaa, TBAAInfo); 1843d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1853d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1866374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCallbool CodeGenModule::isTargetDarwin() const { 187bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor return getContext().getTargetInfo().getTriple().isOSDarwin(); 1886374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall} 1896374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 1905f9e272e632e951b1efe824cd16acb4d96077930Chris Lattnervoid CodeGenModule::Error(SourceLocation loc, StringRef error) { 191d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie unsigned diagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, error); 19232096695c76033a6b0b1747c439f7378a11e8312John McCall getDiags().Report(Context.getFullLoc(loc), diagID); 19332096695c76033a6b0b1747c439f7378a11e8312John McCall} 19432096695c76033a6b0b1747c439f7378a11e8312John McCall 195488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 1962c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 19790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 19890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 19990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 20090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 201d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, 20256b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 2032c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 2040a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 2050a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 2062c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 20758c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 208488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 209c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 21090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 21190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 21290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 21390df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 214d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, 21556b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 216c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 2170a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 218c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 219c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 220bc8d40d85f3fa1e34569834916f18fecaa635152John McCallllvm::ConstantInt *CodeGenModule::getSize(CharUnits size) { 221bc8d40d85f3fa1e34569834916f18fecaa635152John McCall return llvm::ConstantInt::get(SizeTy, size.getQuantity()); 222bc8d40d85f3fa1e34569834916f18fecaa635152John McCall} 223bc8d40d85f3fa1e34569834916f18fecaa635152John McCall 2241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 2250ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson const NamedDecl *D) const { 22604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 227df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 2287e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 2296ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 2307e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 2316ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 232af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility for definitions. 233af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 234c7c9058f4977ef4584d68718e23f34504b150ef4Fariborz Jahanian if (LV.visibilityExplicit() || !GV->hasAvailableExternallyLinkage()) 235c7c9058f4977ef4584d68718e23f34504b150ef4Fariborz Jahanian GV->setVisibility(GetLLVMVisibility(LV.visibility())); 2367cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 2377cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 238cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// Set the symbol visibility of type information (vtable and RTTI) 239cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// associated with the given type. 240cbfe50224b19119e759802bd0c1463269dffd09eJohn McCallvoid CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV, 241cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall const CXXRecordDecl *RD, 242fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson TypeVisibilityKind TVK) const { 2430ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(GV, RD); 244cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 245279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakVTables) 246279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall return; 247279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall 2489a86a137b0872bad25161fb3408a71d919638757Anders Carlsson // We never want to drop the visibility for RTTI names. 2499a86a137b0872bad25161fb3408a71d919638757Anders Carlsson if (TVK == TVK_ForRTTIName) 2509a86a137b0872bad25161fb3408a71d919638757Anders Carlsson return; 2519a86a137b0872bad25161fb3408a71d919638757Anders Carlsson 252cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We want to drop the visibility to hidden for weak type symbols. 253cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // This isn't possible if there might be unresolved references 254cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // elsewhere that rely on this symbol being visible. 255cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2567a536907da776bdc47a704e7cafd641e8150e653John McCall // This should be kept roughly in sync with setThunkVisibility 2577a536907da776bdc47a704e7cafd641e8150e653John McCall // in CGVTables.cpp. 2587a536907da776bdc47a704e7cafd641e8150e653John McCall 259cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Preconditions. 260f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson if (GV->getLinkage() != llvm::GlobalVariable::LinkOnceODRLinkage || 261cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->getVisibility() != llvm::GlobalVariable::DefaultVisibility) 262cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 263cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 264cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Don't override an explicit visibility attribute. 2654421d2b341d041df44013769f23c306308bbab83Douglas Gregor if (RD->getExplicitVisibility()) 266cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 267cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 268cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall switch (RD->getTemplateSpecializationKind()) { 269cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We have to disable the optimization if this is an EI definition 270cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // because there might be EI declarations in other shared objects. 271cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDefinition: 272cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDeclaration: 273cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 274cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2757a536907da776bdc47a704e7cafd641e8150e653John McCall // Every use of a non-template class's type information has to emit it. 276cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_Undeclared: 277cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 278cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2797a536907da776bdc47a704e7cafd641e8150e653John McCall // In theory, implicit instantiations can ignore the possibility of 2807a536907da776bdc47a704e7cafd641e8150e653John McCall // an explicit instantiation declaration because there necessarily 2817a536907da776bdc47a704e7cafd641e8150e653John McCall // must be an EI definition somewhere with default visibility. In 2827a536907da776bdc47a704e7cafd641e8150e653John McCall // practice, it's possible to have an explicit instantiation for 2837a536907da776bdc47a704e7cafd641e8150e653John McCall // an arbitrary template class, and linkers aren't necessarily able 2847a536907da776bdc47a704e7cafd641e8150e653John McCall // to deal with mixed-visibility symbols. 2857a536907da776bdc47a704e7cafd641e8150e653John McCall case TSK_ExplicitSpecialization: 286cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ImplicitInstantiation: 287279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakTemplateVTables) 2887a536907da776bdc47a704e7cafd641e8150e653John McCall return; 289cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 290cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall } 291cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 292cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // If there's a key function, there may be translation units 293cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // that don't have the key function's definition. But ignore 294cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // this if we're emitting RTTI under -fno-rtti. 295fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson if (!(TVK != TVK_ForRTTI) || Features.RTTI) { 296cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (Context.getKeyFunction(RD)) 297cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 298fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson } 299cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 300cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Otherwise, drop the visibility to hidden. 301cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 302b1c65ff108de47a89585ad37874bd6cb232664cdRafael Espindola GV->setUnnamedAddr(true); 303cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall} 304cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 3055f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerStringRef CodeGenModule::getMangledName(GlobalDecl GD) { 306793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 307793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 3085f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; 309793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (!Str.empty()) 310793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 311793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 3124c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall if (!getCXXABI().getMangleContext().shouldMangleDeclName(ND)) { 313793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson IdentifierInfo *II = ND->getIdentifier(); 314793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson assert(II && "Attempt to mangle unnamed decl."); 315793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 316793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = II->getName(); 317793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 318793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson } 319793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 320793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::SmallString<256> Buffer; 321c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola llvm::raw_svector_ostream Out(Buffer); 322793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 323c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Out); 324793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 325c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Out); 326793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const BlockDecl *BD = dyn_cast<BlockDecl>(ND)) 327c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleBlock(BD, Out); 328793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else 329c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleName(ND, Out); 330793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 331793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson // Allocate space for the mangled name. 332c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola Out.flush(); 333793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson size_t Length = Buffer.size(); 334793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson char *Name = MangledNamesAllocator.Allocate<char>(Length); 335793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson std::copy(Buffer.begin(), Buffer.end(), Name); 336793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 3375f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Str = StringRef(Name, Length); 338793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 339793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 340793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson} 341793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 34214110477887e3dc168ffc6c191e72d705051f99ePeter Collingbournevoid CodeGenModule::getBlockMangledName(GlobalDecl GD, MangleBuffer &Buffer, 34314110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const BlockDecl *BD) { 34414110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleContext &MangleCtx = getCXXABI().getMangleContext(); 34514110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const Decl *D = GD.getDecl(); 346c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola llvm::raw_svector_ostream Out(Buffer.getBuffer()); 34714110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne if (D == 0) 348c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleGlobalBlock(BD, Out); 34914110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 350c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleCtorBlock(CD, GD.getCtorType(), BD, Out); 35114110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 352c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleDtorBlock(DD, GD.getDtorType(), BD, Out); 35314110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else 354c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleBlock(cast<DeclContext>(D), BD, Out); 3559a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson} 3569a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson 3575f9e272e632e951b1efe824cd16acb4d96077930Chris Lattnerllvm::GlobalValue *CodeGenModule::GetGlobalValue(StringRef Name) { 358f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return getModule().getNamedValue(Name); 3595f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 3605f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 3616d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 3626d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 3636bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 36449988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3656bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 3666d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3676d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 3686bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 3696bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 3706bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 37149988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3726bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 3736bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 3746bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3756bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 3766bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 3770774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall llvm::FunctionType* CtorFTy = llvm::FunctionType::get(VoidTy, false); 37896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 3796bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3806bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 381c5cbb909e8a27deb8f1a2b6b7bf56a96051af81aChris Lattner llvm::StructType *CtorStructTy = 3827650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType::get(llvm::Type::getInt32Ty(VMContext), 38396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 3846bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3856bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 3866bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 3876bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 3886bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 3891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 3900032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 3913c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 39208e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 3936bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 3946bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3956bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 39696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 3971c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 398572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 3997db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 4001c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 4016d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 4026d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 4036d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 404d46f98573ba104eda102dd3224b2dca69f1c6336John McCallllvm::GlobalValue::LinkageTypes 405d46f98573ba104eda102dd3224b2dca69f1c6336John McCallCodeGenModule::getFunctionLinkage(const FunctionDecl *D) { 40690e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); 4077c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 408f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_Internal) 409d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::InternalLinkage; 410f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 411f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<DLLExportAttr>()) 412d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::DLLExportLinkage; 413f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 414f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<WeakAttr>()) 415d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::WeakAnyLinkage; 416f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 417f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 418f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition somewhere else, so we can use available_externally linkage. 419f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_C99Inline) 420fd0f89d3d7e4220327abdec1cb115474d70219dcFariborz Jahanian return llvm::Function::AvailableExternallyLinkage; 4215584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall 4225584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall // Note that Apple's kernel linker doesn't support symbol 4235584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall // coalescing, so we need to avoid linkonce and weak linkages there. 4245584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall // Normally, this means we just map to internal, but for explicit 4255584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall // instantiations we'll map to external. 4265584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall 427f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C++, the compiler has to emit a definition in every translation unit 428f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // that references the function. We should use linkonce_odr because 429f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // a) if all references in this translation unit are optimized away, we 430f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 431f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 432f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition is dependable. 433f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 434142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext 435142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian ? llvm::Function::LinkOnceODRLinkage 436142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian : llvm::Function::InternalLinkage; 437f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 438f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // An explicit instantiation of a template has weak linkage, since 439f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // explicit instantiations can occur in multiple translation units 440f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // and must all be equivalent. However, we are not allowed to 441f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // throw away these explicit instantiations. 442f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_ExplicitTemplateInstantiation) 443142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext 444142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian ? llvm::Function::WeakODRLinkage 4455584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall : llvm::Function::ExternalLinkage; 446f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 447f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // Otherwise, we have strong external linkage. 448f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner assert(Linkage == GVA_StrongExternal); 449f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner return llvm::Function::ExternalLinkage; 450d46f98573ba104eda102dd3224b2dca69f1c6336John McCall} 451d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 452d46f98573ba104eda102dd3224b2dca69f1c6336John McCall 453d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// SetFunctionDefinitionAttributes - Set attributes for a global. 454d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// 455d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// FIXME: This is currently only done for aliases and functions, but not for 456d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// variables (these details are set in EmitGlobalVarDefinition for variables). 457d46f98573ba104eda102dd3224b2dca69f1c6336John McCallvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 458d46f98573ba104eda102dd3224b2dca69f1c6336John McCall llvm::GlobalValue *GV) { 4597c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 460d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 461d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 4627dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 4631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 4647dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 465ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 466761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 467ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 468761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 469ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 470ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 471f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 472f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 473d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall/// Determines whether the language options require us to model 474d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall/// unwind exceptions. We treat -fexceptions as mandating this 475d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall/// except under the fragile ObjC ABI with only ObjC exceptions 476d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall/// enabled. This means, for example, that C with -fexceptions 477d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall/// enables this. 478d1e40d5389a4382cbebc97d54792f41ee0414af4John McCallstatic bool hasUnwindExceptions(const LangOptions &Features) { 479d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall // If exceptions are completely disabled, obviously this is false. 480d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall if (!Features.Exceptions) return false; 481d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall 482d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall // If C++ exceptions are enabled, this is true. 483d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall if (Features.CXXExceptions) return true; 484d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall 485d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall // If ObjC exceptions are enabled, this depends on the ABI. 486d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall if (Features.ObjCExceptions) { 487d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall if (!Features.ObjCNonFragileABI) return false; 488d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall } 489d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall 490d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall return true; 491d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall} 492d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall 4937c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 4947c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 495abca5a1b3e74e644e297c7590b46ab73a6bb476aRafael Espindola if (CodeGenOpts.UnwindTables) 496abca5a1b3e74e644e297c7590b46ab73a6bb476aRafael Espindola F->setHasUWTable(); 497abca5a1b3e74e644e297c7590b46ab73a6bb476aRafael Espindola 498d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall if (!hasUnwindExceptions(Features)) 4991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 500af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 5012873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman if (D->hasAttr<NakedAttr>()) { 5022873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman // Naked implies noinline: we should not be inlining such functions. 503dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar F->addFnAttr(llvm::Attribute::Naked); 5042873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman F->addFnAttr(llvm::Attribute::NoInline); 5052873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman } 506dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar 5071feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 50881ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 509f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 5102873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman // (noinline wins over always_inline, and we can't specify both in IR) 5112873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman if (D->hasAttr<AlwaysInlineAttr>() && 5122873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman !F->hasFnAttr(llvm::Attribute::NoInline)) 5132873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman F->addFnAttr(llvm::Attribute::AlwaysInline); 5142873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman 515c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) 516c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola F->setUnnamedAddr(true); 517c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola 518e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor if (Features.getStackProtector() == LangOptions::SSPOn) 519fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 520e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor else if (Features.getStackProtector() == LangOptions::SSPReq) 521fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 522fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 523cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); 524cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt if (alignment) 525cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt F->setAlignment(alignment); 526cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt 527fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 528bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 529bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 530f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 531f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 5321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 5337c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 534934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) 535934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson setGlobalVisibility(GV, ND); 5361fb0caaa7bef765b85972274e3b434af2572c141John McCall else 5371fb0caaa7bef765b85972274e3b434af2572c141John McCall GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 5387c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 53940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 5407c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 5417c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 54240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 5437c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 54482d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 54582d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); 5467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 5477c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5480e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 5490e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 5500e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 5510e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 5520e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 5537c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5547c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 5557c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5560e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 557f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 558f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 559b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlssonvoid CodeGenModule::SetFunctionAttributes(GlobalDecl GD, 560c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 561c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 5620ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne if (unsigned IID = F->getIntrinsicID()) { 5630ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne // If this is an intrinsic function, set the function's attributes 5640ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne // to the intrinsic's attributes. 5650ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne F->setAttributes(llvm::Intrinsic::getAttributes((llvm::Intrinsic::ID)IID)); 5660ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne return; 5670ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne } 5680ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne 569b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); 570b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson 571c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 572b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); 5731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5747c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 5757c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 5761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 57740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 5787c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 5791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 5800a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor FD->isWeakImported()) { 5817c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 5821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 5837c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 5847c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 5851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 586af14603ca61757cf4361b583b45639a04c57e651John McCall 587af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = FD->getLinkageAndVisibility(); 588af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() == ExternalLinkage && LV.visibilityExplicit()) { 589af14603ca61757cf4361b583b45639a04c57e651John McCall F->setVisibility(GetLLVMVisibility(LV.visibility())); 590af14603ca61757cf4361b583b45639a04c57e651John McCall } 5917c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 5927c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 59340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 5947c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 595219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 596219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 5970269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 5981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 5990269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 60035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 6010269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 6020269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 6030269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 6040269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 605ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 6060269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 6070269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 6082acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 6091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 61035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 61135f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 61235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 61335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 6141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 6151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 616a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 61735f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 6181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 619c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 620c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 62196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 6221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 6241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 6250269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 6267db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 6271c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 6280269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 6290269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 6300269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 6310269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 6320269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 63367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 63467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 635dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky // for a static function, iterate until no changes are made. 636bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 637046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson while (!DeferredDeclsToEmit.empty() || !DeferredVTables.empty()) { 638046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson if (!DeferredVTables.empty()) { 639046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson const CXXRecordDecl *RD = DeferredVTables.back(); 640046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson DeferredVTables.pop_back(); 641046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson getVTables().GenerateClassData(getVTableLinkage(RD), RD); 642bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola continue; 643bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola } 644bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 6452a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 64667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 64767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 648c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // Check to see if we've already emitted this. This is necessary 649c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // for a couple of reasons: first, decls can end up in the 650c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // deferred-decls queue multiple times, and second, decls can end 651c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // up with definitions in unusual ways (e.g. by an extern inline 652c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // function acquiring a strong function redefinition). Just 653c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // ignore these cases. 654c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // 655c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // TODO: That said, looking this up multiple times is very wasteful. 6565f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Name = getMangledName(D); 657f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *CGRef = GetGlobalValue(Name); 65867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 6591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 66067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 66167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 6621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 663c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // GlobalAlias::isDeclaration() defers to the aliasee, but for our 664c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // purposes an alias counts as a definition. 665c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall if (isa<llvm::GlobalAlias>(CGRef)) 666c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall continue; 667c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall 66867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 66967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 67067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 67377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougevoid CodeGenModule::EmitGlobalAnnotations() { 67477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (Annotations.empty()) 67577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return; 67677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 67777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge // Create a new global variable for the ConstantStruct in the Module. 67877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::Constant *Array = llvm::ConstantArray::get(llvm::ArrayType::get( 67977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge Annotations[0]->getType(), Annotations.size()), Annotations); 68077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::GlobalValue *gv = new llvm::GlobalVariable(getModule(), 68177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge Array->getType(), false, llvm::GlobalValue::AppendingLinkage, Array, 68277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge "llvm.global.annotations"); 68377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge gv->setSection(AnnotationSection); 68477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 68577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 68677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougellvm::Constant *CodeGenModule::EmitAnnotationString(llvm::StringRef Str) { 68777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::StringMap<llvm::Constant*>::iterator i = AnnotationStrings.find(Str); 68877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (i != AnnotationStrings.end()) 68977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return i->second; 69077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 69177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge // Not found yet, create a new global. 692ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner llvm::Constant *s = llvm::ConstantDataArray::getString(getLLVMContext(), Str); 69377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::GlobalValue *gv = new llvm::GlobalVariable(getModule(), s->getType(), 69477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge true, llvm::GlobalValue::PrivateLinkage, s, ".str"); 69577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge gv->setSection(AnnotationSection); 69677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge gv->setUnnamedAddr(true); 69777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge AnnotationStrings[Str] = gv; 69877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return gv; 69977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 70077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 70177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougellvm::Constant *CodeGenModule::EmitAnnotationUnit(SourceLocation Loc) { 70277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge SourceManager &SM = getContext().getSourceManager(); 70377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge PresumedLoc PLoc = SM.getPresumedLoc(Loc); 70477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (PLoc.isValid()) 70577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return EmitAnnotationString(PLoc.getFilename()); 70677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return EmitAnnotationString(SM.getBufferName(Loc)); 70777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 70877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 70977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougellvm::Constant *CodeGenModule::EmitAnnotationLineNo(SourceLocation L) { 71077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge SourceManager &SM = getContext().getSourceManager(); 71177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge PresumedLoc PLoc = SM.getPresumedLoc(L); 71277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge unsigned LineNo = PLoc.isValid() ? PLoc.getLine() : 71377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge SM.getExpansionLineNumber(L); 71477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return llvm::ConstantInt::get(Int32Ty, LineNo); 71577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 71677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 7171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 7188bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 71977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge SourceLocation L) { 72077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge // Get the globals for file name, annotation, and the line number. 72177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::Constant *AnnoGV = EmitAnnotationString(AA->getAnnotation()), 72277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge *UnitGV = EmitAnnotationUnit(L), 72377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge *LineNoCst = EmitAnnotationLineNo(L); 7248bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 72557d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 7268bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 72777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::ConstantExpr::getBitCast(GV, Int8PtrTy), 72877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::ConstantExpr::getBitCast(AnnoGV, Int8PtrTy), 72977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::ConstantExpr::getBitCast(UnitGV, Int8PtrTy), 73077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge LineNoCst 7318bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 732c5cbb909e8a27deb8f1a2b6b7bf56a96051af81aChris Lattner return llvm::ConstantStruct::getAnon(Fields); 7338bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 7348bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 73577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougevoid CodeGenModule::AddGlobalAnnotations(const ValueDecl *D, 73677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::GlobalValue *GV) { 73777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge assert(D->hasAttr<AnnotateAttr>() && "no annotate attribute"); 73877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge // Get the struct elements for these annotations. 73977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge for (specific_attr_iterator<AnnotateAttr> 74077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge ai = D->specific_attr_begin<AnnotateAttr>(), 74177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge ae = D->specific_attr_end<AnnotateAttr>(); ai != ae; ++ai) 74277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge Annotations.push_back(EmitAnnotateAttr(GV, *ai, D->getLocation())); 74377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 74477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 745a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidisbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 74690e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis // Never defer when EmitAllDecls is specified. 74790e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis if (Features.EmitAllDecls) 748a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidis return false; 7490b6bc8bd7a1d2a7d7478d13d78cff94cacad61fcDouglas Gregor 7504ac7c0bb39696e92fd220118fedc484c09a69870Argyrios Kyrtzidis return !getContext().DeclMustBeEmitted(Global); 75173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 75273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 7536a836706c40a31c716952b74785102c90fd6afa7Rafael Espindolallvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { 7546a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const AliasAttr *AA = VD->getAttr<AliasAttr>(); 7556a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola assert(AA && "No alias?"); 7566a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7572acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); 7586a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7596a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // See if there is already something with the target's name in the module. 760f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); 7616a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7626a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::Constant *Aliasee; 7636a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (isa<llvm::FunctionType>(DeclTy)) 7641faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 7651faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 7666a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola else 767f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 7686a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::PointerType::getUnqual(DeclTy), 0); 7696a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (!Entry) { 7706a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); 7716a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola F->setLinkage(llvm::Function::ExternalWeakLinkage); 7726a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.insert(F); 7736a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 7746a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7756a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return Aliasee; 7766a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola} 7776a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 778b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 7794a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 7801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7816a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // Weak references don't produce any output by themselves. 7826a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (Global->hasAttr<WeakRefAttr>()) 7836a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return; 7846a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 785bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 786bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 78740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 788f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return EmitAliasDefinition(GD); 789219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 790d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne // If this is CUDA, be selective about which declarations we emit. 791d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne if (Features.CUDA) { 792d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne if (CodeGenOpts.CUDAIsDevice) { 793d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne if (!Global->hasAttr<CUDADeviceAttr>() && 794d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne !Global->hasAttr<CUDAGlobalAttr>() && 795d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne !Global->hasAttr<CUDAConstantAttr>() && 796d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne !Global->hasAttr<CUDASharedAttr>()) 797d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne return; 798d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne } else { 799d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne if (!Global->hasAttr<CUDAHostAttr>() && ( 800d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne Global->hasAttr<CUDADeviceAttr>() || 801d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne Global->hasAttr<CUDAConstantAttr>() || 802d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne Global->hasAttr<CUDASharedAttr>())) 803d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne return; 804d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne } 805d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne } 806d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne 80767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 8085e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 80973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 810dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky if (!FD->doesThisDeclarationHaveABody()) { 811dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky if (!FD->doesDeclarationForceExternallyVisibleDefinition()) 812dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky return; 813dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky 814dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky const FunctionDecl *InlineDefinition = 0; 815dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky FD->getBody(InlineDefinition); 816dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky 8175f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(GD); 818dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky llvm::StringMap<GlobalDecl>::iterator DDI = 819dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky DeferredDecls.find(MangledName); 820dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky if (DDI != DeferredDecls.end()) 821dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky DeferredDecls.erase(DDI); 822dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky EmitGlobalDefinition(InlineDefinition); 82373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 824dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky } 8250269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 8260269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 827bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 828bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 829a9a55c063e9e59c6ab0a6d7a21302660f7bde9f9Douglas Gregor if (VD->isThisDeclarationADefinition() != VarDecl::Definition) 83073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 8314c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 8324c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 83367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 83467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 8354357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (!MayDeferGeneration(Global)) { 8364357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Emit the definition if it can't be deferred. 8374357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner EmitGlobalDefinition(GD); 838bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 839bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 840bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall 841bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // If we're deferring emission of a C++ variable with an 842bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer, remember the order in which it appeared in the file. 843bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus && isa<VarDecl>(Global) && 844bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall cast<VarDecl>(Global)->hasInit()) { 845bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); 846bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall CXXGlobalInits.push_back(0); 847bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } 8484357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 8494357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // If the value has already been used, add it directly to the 8504357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit list. 8515f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(GD); 8524357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (GetGlobalValue(MangledName)) 8534357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDeclsToEmit.push_back(GD); 8544357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner else { 8554357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 8564357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // first use of the mangled name will cause it to move into 8574357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit. 8584357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDecls[MangledName] = GD; 8594357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner } 8604c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 8614c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 862a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindolanamespace { 863a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola struct FunctionIsDirectlyRecursive : 864a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola public RecursiveASTVisitor<FunctionIsDirectlyRecursive> { 865a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola const StringRef Name; 866bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola const Builtin::Context &BI; 867a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola bool Result; 868bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola FunctionIsDirectlyRecursive(StringRef N, const Builtin::Context &C) : 869bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola Name(N), BI(C), Result(false) { 870a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola } 871a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola typedef RecursiveASTVisitor<FunctionIsDirectlyRecursive> Base; 872a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola 873a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola bool TraverseCallExpr(CallExpr *E) { 874bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola const FunctionDecl *FD = E->getDirectCallee(); 875bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola if (!FD) 876a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola return true; 877bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola AsmLabelAttr *Attr = FD->getAttr<AsmLabelAttr>(); 878bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola if (Attr && Name == Attr->getLabel()) { 879bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola Result = true; 880bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola return false; 881bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola } 882bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola unsigned BuiltinID = FD->getBuiltinID(); 883bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola if (!BuiltinID) 884a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola return true; 885f6b56374e4e5b9f0078efac5ed4918c3a04296f7Nick Lewycky StringRef BuiltinName = BI.GetName(BuiltinID); 886f6b56374e4e5b9f0078efac5ed4918c3a04296f7Nick Lewycky if (BuiltinName.startswith("__builtin_") && 887f6b56374e4e5b9f0078efac5ed4918c3a04296f7Nick Lewycky Name == BuiltinName.slice(strlen("__builtin_"), StringRef::npos)) { 888a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola Result = true; 889a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola return false; 890a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola } 891a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola return true; 892a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola } 893a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola }; 894a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola} 895a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola 896bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola// isTriviallyRecursive - Check if this function calls another 897bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola// decl that, because of the asm attribute or the other decl being a builtin, 898bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola// ends up pointing to itself. 899a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindolabool 900bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael EspindolaCodeGenModule::isTriviallyRecursive(const FunctionDecl *FD) { 901bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola StringRef Name; 902bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola if (getCXXABI().getMangleContext().shouldMangleDeclName(FD)) { 90322afaccd9ab77d46106e94c47907d955a014ae3fNick Lewycky // asm labels are a special kind of mangling we have to support. 904bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola AsmLabelAttr *Attr = FD->getAttr<AsmLabelAttr>(); 905bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola if (!Attr) 906bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola return false; 907bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola Name = Attr->getLabel(); 908bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola } else { 909bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola Name = FD->getName(); 910bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola } 911a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola 912bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola FunctionIsDirectlyRecursive Walker(Name, Context.BuiltinInfo); 913bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola Walker.TraverseFunctionDecl(const_cast<FunctionDecl*>(FD)); 914a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola return Walker.Result; 915a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola} 916a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola 917a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindolabool 918a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael EspindolaCodeGenModule::shouldEmitFunction(const FunctionDecl *F) { 919a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola if (getFunctionLinkage(F) != llvm::Function::AvailableExternallyLinkage) 920a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola return true; 921cc4889f72ec68319969ba51e214d9940eb9327e5Rafael Espindola if (CodeGenOpts.OptimizationLevel == 0 && 922cc4889f72ec68319969ba51e214d9940eb9327e5Rafael Espindola !F->hasAttr<AlwaysInlineAttr>()) 923a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola return false; 924a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola // PR9614. Avoid cases where the source code is lying to us. An available 925a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola // externally function should have an equivalent function somewhere else, 926a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola // but a function that calls itself is clearly not equivalent to the real 927a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola // implementation. 928a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola // This happens in glibc's btowc and in some configure checks. 929bcf6b98247bd3ac76c5edf706b1087a8d32c0320Rafael Espindola return !isTriviallyRecursive(F); 930a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola} 931a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola 932b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 9334a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 9341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 935cb421fa690da545b58a720abe5f1c49b166dbde7Dan Gohman PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), 9368e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 9378e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 9388e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 93944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 94044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // At -O0, don't generate IR for functions with available_externally 94144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // linkage. 942a411d2f1ed4598a7a96a7befe07a9d9ee1a6efdeRafael Espindola if (!shouldEmitFunction(Function)) 94344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return; 94444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor 94544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { 9467dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman // Make sure to emit the definition(s) before we emit the thunks. 9477dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman // This is necessary for the generation of certain thunks. 9487dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) 9497dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitCXXConstructor(CD, GD.getCtorType()); 9507dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman else if (const CXXDestructorDecl *DD =dyn_cast<CXXDestructorDecl>(Method)) 9517dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitCXXDestructor(DD, GD.getDtorType()); 9527dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman else 9537dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitGlobalFunctionDefinition(GD); 9547dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman 95544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (Method->isVirtual()) 95644eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getVTables().EmitThunks(GD); 9577270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson 9587dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman return; 95944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 960b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 961b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalFunctionDefinition(GD); 96244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 963b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 964b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 965b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalVarDefinition(VD); 9664357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 967b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Invalid argument to EmitGlobalDefinition()"); 968bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 969bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 97074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 97174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 97274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 97374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 97474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 97574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 97674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 977f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 9785f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerCodeGenModule::GetOrCreateLLVMFunction(StringRef MangledName, 9792acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty, 980f85e193739c953358c865005855253af4f68a497John McCall GlobalDecl D, bool ForVTable, 981f85e193739c953358c865005855253af4f68a497John McCall llvm::Attributes ExtraAttrs) { 9820558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 983f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 9840558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 9856a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 9866a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); 9876a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (FD && !FD->hasAttr<WeakAttr>()) 9887270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 9896a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 9906a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 9916a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 9926a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 9930558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 9940558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 9951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9960558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 9979cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return llvm::ConstantExpr::getBitCast(Entry, Ty->getPointerTo()); 9980558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 9991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1000654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 1001654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 1002654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 1003654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 1004784f21121a6c9418ebd86baa6814e36e1176c410John McCall 10052acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *FTy; 1006784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (isa<llvm::FunctionType>(Ty)) { 1007784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = cast<llvm::FunctionType>(Ty); 1008784f21121a6c9418ebd86baa6814e36e1176c410John McCall } else { 10090774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall FTy = llvm::FunctionType::get(VoidTy, false); 1010654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 1011654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 1012bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 1013784f21121a6c9418ebd86baa6814e36e1176c410John McCall llvm::Function *F = llvm::Function::Create(FTy, 1014654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 1015f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall MangledName, &getModule()); 1016f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(F->getName() == MangledName && "name was uniqued!"); 1017654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 1018b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetFunctionAttributes(D, F, IsIncompleteFunction); 1019f85e193739c953358c865005855253af4f68a497John McCall if (ExtraAttrs != llvm::Attribute::None) 1020f85e193739c953358c865005855253af4f68a497John McCall F->addFnAttr(ExtraAttrs); 1021654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 102271efba0bbafaefab14419fbd284efff5f7acade7Kostya Serebryany if (Features.AddressSanitizer) { 102371efba0bbafaefab14419fbd284efff5f7acade7Kostya Serebryany // When AddressSanitizer is enabled, set AddressSafety attribute 102471efba0bbafaefab14419fbd284efff5f7acade7Kostya Serebryany // unless __attribute__((no_address_safety_analysis)) is used. 102571efba0bbafaefab14419fbd284efff5f7acade7Kostya Serebryany const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); 102671efba0bbafaefab14419fbd284efff5f7acade7Kostya Serebryany if (!FD || !FD->hasAttr<NoAddressSafetyAnalysisAttr>()) 102771efba0bbafaefab14419fbd284efff5f7acade7Kostya Serebryany F->addFnAttr(llvm::Attribute::AddressSafety); 102871efba0bbafaefab14419fbd284efff5f7acade7Kostya Serebryany } 102971efba0bbafaefab14419fbd284efff5f7acade7Kostya Serebryany 103067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 103167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 103267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 1033f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 103467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 103567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 103667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 103767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 103867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 1039bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall 1040bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Otherwise, there are cases we have to worry about where we're 1041bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // using a declaration for which we must emit a definition but where 1042bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // we might not find a top-level definition: 1043bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - member functions defined inline in their classes 1044bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - friend functions defined inline in some class 1045bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - special member functions with implicit definitions 1046bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // If we ever change our AST traversal to walk into class methods, 1047bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // this will be unnecessary. 10481faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // 10491faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // We also don't emit a definition for a function if it's going to be an entry 10501faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // in a vtable, unless it's already marked as used. 105101de7a44cea9f77cbcda65faad8edc8b48a3b617Rafael Espindola } else if (getLangOptions().CPlusPlus && D.getDecl()) { 1052bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Look for a declaration that's lexically in a record. 1053bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall const FunctionDecl *FD = cast<FunctionDecl>(D.getDecl()); 1054bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall do { 1055bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { 10561faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson if (FD->isImplicit() && !ForVTable) { 1057bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall assert(FD->isUsed() && "Sema didn't mark implicit function as used!"); 1058a29bf41b8f49578207ce36f6b21ff9bb7ee77babDouglas Gregor DeferredDeclsToEmit.push_back(D.getWithDecl(FD)); 1059bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 106010620eb5164e31208fcbf0437cd79ae535ed0559Sean Hunt } else if (FD->doesThisDeclarationHaveABody()) { 1061a29bf41b8f49578207ce36f6b21ff9bb7ee77babDouglas Gregor DeferredDeclsToEmit.push_back(D.getWithDecl(FD)); 1062bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 1063bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } 10647b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 1065ef96ee0be5f100789f451641542a69cd719144d2Douglas Gregor FD = FD->getPreviousDecl(); 1066bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } while (FD); 106767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 10681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1069784f21121a6c9418ebd86baa6814e36e1176c410John McCall // Make sure the result is of the requested type. 1070784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (!IsIncompleteFunction) { 1071784f21121a6c9418ebd86baa6814e36e1176c410John McCall assert(F->getType()->getElementType() == Ty); 1072784f21121a6c9418ebd86baa6814e36e1176c410John McCall return F; 1073784f21121a6c9418ebd86baa6814e36e1176c410John McCall } 1074784f21121a6c9418ebd86baa6814e36e1176c410John McCall 10759cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 1076784f21121a6c9418ebd86baa6814e36e1176c410John McCall return llvm::ConstantExpr::getBitCast(F, PTy); 10770558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 10780558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 107974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 108074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 108174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 1082b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 10832acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty, 10841faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson bool ForVTable) { 108574391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 108674391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 10874a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 1088bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 10895f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(GD); 10901faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson return GetOrCreateLLVMFunction(MangledName, Ty, GD, ForVTable); 109174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 109277ba708819285931932ecd33691a672bb59d221aEli Friedman 109374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 109474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 109574391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 10962acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris LattnerCodeGenModule::CreateRuntimeFunction(llvm::FunctionType *FTy, 10975f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Name, 1098f85e193739c953358c865005855253af4f68a497John McCall llvm::Attributes ExtraAttrs) { 1099f85e193739c953358c865005855253af4f68a497John McCall return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false, 1100f85e193739c953358c865005855253af4f68a497John McCall ExtraAttrs); 110174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 1102bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1103da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregorstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D, 1104da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor bool ConstantInit) { 110588786862424cb2d478516d911709dc19c962af9cJohn McCall if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) 110620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 1107da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor 1108da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (Context.getLangOptions().CPlusPlus) { 1109da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (const RecordType *Record 1110da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor = Context.getBaseElementType(D->getType())->getAs<RecordType>()) 11112bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor return ConstantInit && 11122bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor cast<CXXRecordDecl>(Record->getDecl())->isPOD() && 11132bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor !cast<CXXRecordDecl>(Record->getDecl())->hasMutableFields(); 111420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 1115da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor 111620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 111720e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 111820e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 111974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 112074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 112174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 112274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 112374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 112474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 112574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 1126f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 11275f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerCodeGenModule::GetOrCreateLLVMGlobal(StringRef MangledName, 11282acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::PointerType *Ty, 1129c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola const VarDecl *D, 1130c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola bool UnnamedAddr) { 11313c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 1132f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 113399b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 11346a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 11356a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (D && !D->hasAttr<WeakAttr>()) 11367270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 11376a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 11386a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 11396a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 11406a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 1141c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola if (UnnamedAddr) 1142c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola Entry->setUnnamedAddr(true); 1143c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola 114474391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 1145570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 11461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 114799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 11483c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 114999b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 11501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 115167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 115267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 115367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 1154f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 115567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 115667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 115767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 115867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 115967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 116067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 11611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 11631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 116499b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 1165f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 0, MangledName, 0, 116656ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 116749988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 116899b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 116974391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 1170f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 1171f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 1172da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor GV->setConstant(DeclIsConstantGlobal(Context, D, false)); 117349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 1174110e8e56af30363072c140285961592b0107f789John McCall // Set linkage and visibility in case we never see a definition. 1175af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 1176af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() != ExternalLinkage) { 117715e310a3b970b64a84cb30f0005bc396b4d978cbJohn McCall // Don't set internal linkage on declarations. 1178110e8e56af30363072c140285961592b0107f789John McCall } else { 1179110e8e56af30363072c140285961592b0107f789John McCall if (D->hasAttr<DLLImportAttr>()) 1180110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::DLLImportLinkage); 11810a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor else if (D->hasAttr<WeakAttr>() || D->isWeakImported()) 1182110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 1183110e8e56af30363072c140285961592b0107f789John McCall 1184af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility on a declaration only if it's explicit. 1185af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.visibilityExplicit()) 1186af14603ca61757cf4361b583b45639a04c57e651John McCall GV->setVisibility(GetLLVMVisibility(LV.visibility())); 1187110e8e56af30363072c140285961592b0107f789John McCall } 118856ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 118956ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 119074391b48b4791cded373683a3baf67314f358d50Chris Lattner } 11911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1192f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GV; 119374391b48b4791cded373683a3baf67314f358d50Chris Lattner} 1194eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 1195eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 11963bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlssonllvm::GlobalVariable * 11975f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerCodeGenModule::CreateOrReplaceCXXRuntimeVariable(StringRef Name, 11982acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty, 11993bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalValue::LinkageTypes Linkage) { 12003bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name); 12013bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *OldGV = 0; 12023bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 12033bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 12043bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV) { 12053bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Check if the variable has the right type. 12063bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV->getType()->getElementType() == Ty) 12073bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 12083bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 12093bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Because C++ name mangling, the only way we can end up with an already 12103bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // existing global with the same name is if it has been declared extern "C". 121196eaf2992b5955d1470fc9cce7a96e7e1e3b4ea7Anders Carlsson assert(GV->isDeclaration() && "Declaration has wrong type!"); 12123bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV = GV; 12133bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 12143bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 12153bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Create a new variable. 12163bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV = new llvm::GlobalVariable(getModule(), Ty, /*isConstant=*/true, 12173bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson Linkage, 0, Name); 12183bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 12193bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (OldGV) { 12203bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Replace occurrences of the old variable if needed. 12213bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV->takeName(OldGV); 12223bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 12233bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (!OldGV->use_empty()) { 12243bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::Constant *NewPtrForOldDecl = 12253bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); 12263bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->replaceAllUsesWith(NewPtrForOldDecl); 12273bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 12283bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 12293bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->eraseFromParent(); 12303bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 12313bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 12323bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 12333bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson} 12343bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 123574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 123674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 123774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 123874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 123974391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 12402acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty) { 124174391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 124274391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 124374391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 124474391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 12451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12462acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::PointerType *PTy = 1247207f4d8543529221932af82836016a2ef066c917Peter Collingbourne llvm::PointerType::get(Ty, getContext().getTargetAddressSpace(ASTTy)); 1248f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 12495f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(D); 1250f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMGlobal(MangledName, PTy, D); 125174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 12523f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 125374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 125474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 125574391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 12562acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris LattnerCodeGenModule::CreateRuntimeVariable(llvm::Type *Ty, 12575f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Name) { 12581de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0, 1259c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola true); 1260bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1261bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 126203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 126303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 126403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 12657520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 12667520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 12677520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 12687520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 12695f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(D); 1270f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (!GetGlobalValue(MangledName)) { 1271555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 127203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 12737520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 12747520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 12757520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 12767520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 127703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 127803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 127903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 12806fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregorvoid CodeGenModule::EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired) { 12816fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor if (DefinitionRequired) 12826fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor getVTables().GenerateClassData(getVTableLinkage(Class), Class); 12836fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor} 12846fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor 12854b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregorllvm::GlobalVariable::LinkageTypes 1286046c294a43024874ff35656c6e785b64e72f1f36Anders CarlssonCodeGenModule::getVTableLinkage(const CXXRecordDecl *RD) { 1287cb5d2d0647fdab2e36c85b417e03bf18916ce10cEli Friedman if (RD->getLinkage() != ExternalLinkage) 1288dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::InternalLinkage; 1289dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1290dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (const CXXMethodDecl *KeyFunction 1291dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor = RD->getASTContext().getKeyFunction(RD)) { 1292dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // If this class has a key function, use that to determine the linkage of 1293dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // the vtable. 12944b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor const FunctionDecl *Def = 0; 129506a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (KeyFunction->hasBody(Def)) 12964b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor KeyFunction = cast<CXXMethodDecl>(Def); 1297dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 12984b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor switch (KeyFunction->getTemplateSpecializationKind()) { 12994b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_Undeclared: 13004b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitSpecialization: 13016d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // When compiling with optimizations turned on, we emit all vtables, 13026d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // even if the key function is not defined in the current translation 13036d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // unit. If this is the case, use available_externally linkage. 13046d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson if (!Def && CodeGenOpts.OptimizationLevel) 13056d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson return llvm::GlobalVariable::AvailableExternallyLinkage; 13066d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson 13074b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->isInlined()) 1308142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1309142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1310142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 13114b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 13124b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::ExternalLinkage; 13134b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 13144b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ImplicitInstantiation: 1315142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1316142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1317142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1318f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 13194b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDefinition: 1320142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1321142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::WeakODRLinkage : 1322142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1323f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 13244b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 13254b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // FIXME: Use available_externally linkage. However, this currently 13264b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // breaks LLVM's build due to undefined symbols. 13274b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1328142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1329142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1330142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 13314b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 1332dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor } 1333dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 133453bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian if (Context.getLangOptions().AppleKext) 133553bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::Function::InternalLinkage; 133653bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian 1337dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor switch (RD->getTemplateSpecializationKind()) { 1338dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_Undeclared: 1339dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitSpecialization: 1340dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ImplicitInstantiation: 1341dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // FIXME: Use available_externally linkage. However, this currently 1342dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // breaks LLVM's build due to undefined symbols. 1343dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1344142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDeclaration: 134553bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 1346142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian 1347142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDefinition: 134853bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 13494b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 13503026348bd4c13a0f83b59839f64065e0fcbea253David Blaikie 13513026348bd4c13a0f83b59839f64065e0fcbea253David Blaikie llvm_unreachable("Invalid TemplateSpecializationKind!"); 13524b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor} 13534b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 13542acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris LattnerCharUnits CodeGenModule::GetTargetTypeStoreSize(llvm::Type *Ty) const { 135506f486ecd05bd6788da97c39164c1903a084c26dKen Dyck return Context.toCharUnitsFromBits( 135606f486ecd05bd6788da97c39164c1903a084c26dKen Dyck TheTargetData.getTypeStoreSizeInBits(Ty)); 1357687cc4a850b59116efee061018f0d8df50728b82Ken Dyck} 1358687cc4a850b59116efee061018f0d8df50728b82Ken Dyck 1359bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 13608f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 136177ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 13626c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman bool NonConstInit = false; 13631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13642d6a5670465cb3f1d811695a9f23e372508240d2Richard Smith const VarDecl *InitDecl; 13652d6a5670465cb3f1d811695a9f23e372508240d2Richard Smith const Expr *InitExpr = D->getAnyInitializer(InitDecl); 13663bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson 13673bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson if (!InitExpr) { 1368cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 136903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 137003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 137103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 137203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 137303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 137403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 137503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 137603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 137703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 1378b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 137977ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 13802d6a5670465cb3f1d811695a9f23e372508240d2Richard Smith Init = EmitConstantInit(*InitDecl); 13816e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 13823bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson QualType T = InitExpr->getType(); 1383c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor if (D->getType()->isReferenceType()) 1384c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor T = D->getType(); 13852d6a5670465cb3f1d811695a9f23e372508240d2Richard Smith 138689ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 138789ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 13886c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman NonConstInit = true; 138989ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 139089ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 139189ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 139289ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 1393bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } else { 1394bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // We don't need an initializer, so remove the entry for the delayed 1395bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer position (just in case this entry was delayed). 1396bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus) 1397bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition.erase(D); 13986e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 13998f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 14008e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 14012acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type* InitType = Init->getType(); 1402570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 14031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1404570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 1405570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 14069d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 14079d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 14089d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 1409570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 1410570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 14111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1412570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 1413570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 14141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1415570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 1416570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 1417570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 1418570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 1419570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 1420570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 1421570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 1422570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 1423570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 1424570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 1425570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 1426207f4d8543529221932af82836016a2ef066c917Peter Collingbourne GV->getType()->getAddressSpace() != 1427207f4d8543529221932af82836016a2ef066c917Peter Collingbourne getContext().getTargetAddressSpace(ASTTy)) { 14281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1429f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // Move the old entry aside so that we'll create a new one. 14305f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Entry->setName(StringRef()); 1431232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 1432570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 1433570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 14340558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 143577ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 14361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 14373c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 1438570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 143977ba708819285931932ecd33691a672bb59d221aEli Friedman 144077ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 1441570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 144277ba708819285931932ecd33691a672bb59d221aEli Friedman } 144377ba708819285931932ecd33691a672bb59d221aEli Friedman 144477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (D->hasAttr<AnnotateAttr>()) 144577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge AddGlobalAnnotations(D, GV); 14468bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 144788a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 1448e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 1449e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 1450e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 1451da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (!NonConstInit && DeclIsConstantGlobal(Context, D, true)) 1452e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 14531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14548b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); 1455354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 145688a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 1457354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage = 1458354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GetLLVMLinkageVarDefinition(D, GV); 1459354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setLinkage(Linkage); 1460354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian if (Linkage == llvm::GlobalVariable::CommonLinkage) 1461354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // common vars aren't constant even if declared const. 1462354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setConstant(false); 1463354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1464354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian SetCommonAttributes(D, GV); 1465354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 14663030eb82593097502469a8b3fc26112c79c75605John McCall // Emit the initializer function if necessary. 14673030eb82593097502469a8b3fc26112c79c75605John McCall if (NonConstInit) 14683030eb82593097502469a8b3fc26112c79c75605John McCall EmitCXXGlobalVarDeclInitFunc(D, GV); 14693030eb82593097502469a8b3fc26112c79c75605John McCall 1470354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // Emit global variable debug information. 147173fb35003aad027492e661a3749e921b5d1ecaf9Eric Christopher if (CGDebugInfo *DI = getModuleDebugInfo()) 1472354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->EmitGlobalVariable(GV, D); 1473354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian} 1474354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1475354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanianllvm::GlobalValue::LinkageTypes 1476354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz JahanianCodeGenModule::GetLLVMLinkageVarDefinition(const VarDecl *D, 1477354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalVariable *GV) { 147890e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); 1479a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 1480354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::InternalLinkage; 148140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1482354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLImportLinkage; 148340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1484354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLExportLinkage; 1485e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1486e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1487354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 1488e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1489354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 14908f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor } else if (Linkage == GVA_TemplateInstantiation || 14918f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor Linkage == GVA_ExplicitTemplateInstantiation) 149299ace16bc6962f1fc3dc45bbbdf2eb74e555a8adJohn McCall return llvm::GlobalVariable::WeakODRLinkage; 1493a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher else if (!getLangOptions().CPlusPlus && 1494a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher ((!CodeGenOpts.NoCommon && !D->getAttr<NoCommonAttr>()) || 1495a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher D->getAttr<CommonAttr>()) && 1496309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 1497ab27d6ea7b4ce2762a16905281de796db32bb6f2Fariborz Jahanian !D->getAttr<SectionAttr>() && !D->isThreadSpecified() && 1498ab27d6ea7b4ce2762a16905281de796db32bb6f2Fariborz Jahanian !D->getAttr<WeakImportAttr>()) { 149991f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher // Thread local vars aren't considered common linkage. 1500354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::CommonLinkage; 1501686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 1502354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::ExternalLinkage; 150388a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 15045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1505bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1506bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1507bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1508bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1509bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1510bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1511bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1512bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1513bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1514bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1515bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1516bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1517bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1518bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 15191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15202acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *NewRetTy = NewFn->getReturnType(); 15215f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Value*, 4> ArgList; 1522bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1523bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1524dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer UI != E; ) { 1525bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 1526dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::Value::use_iterator I = UI++; // Increment before the CI is erased. 1527dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*I); 15288670cd3ea4dfbf86caacd270ec2441e9949bbb6aGabor Greif if (!CI) continue; // FIXME: when we allow Invoke, just do CallSite CS(*I) 152935db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif llvm::CallSite CS(CI); 1530dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer if (!CI || !CS.isCallee(I)) continue; 15311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1532bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1533bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1534bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1535bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1536bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 153740f9c302f23a35611cd354f40b22b37f2c554a40John McCall // Get the attribute list. 153840f9c302f23a35611cd354f40b22b37f2c554a40John McCall llvm::SmallVector<llvm::AttributeWithIndex, 8> AttrVec; 153940f9c302f23a35611cd354f40b22b37f2c554a40John McCall llvm::AttrListPtr AttrList = CI->getAttributes(); 154040f9c302f23a35611cd354f40b22b37f2c554a40John McCall 154140f9c302f23a35611cd354f40b22b37f2c554a40John McCall // Get any return attributes. 154240f9c302f23a35611cd354f40b22b37f2c554a40John McCall llvm::Attributes RAttrs = AttrList.getRetAttributes(); 154340f9c302f23a35611cd354f40b22b37f2c554a40John McCall 154440f9c302f23a35611cd354f40b22b37f2c554a40John McCall // Add the return attributes. 154540f9c302f23a35611cd354f40b22b37f2c554a40John McCall if (RAttrs) 154640f9c302f23a35611cd354f40b22b37f2c554a40John McCall AttrVec.push_back(llvm::AttributeWithIndex::get(0, RAttrs)); 154740f9c302f23a35611cd354f40b22b37f2c554a40John McCall 1548bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1549bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1550bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1551bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1552bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1553bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1554bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 155535db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif if (CS.arg_size() == ArgNo || 155635db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif CS.getArgument(ArgNo)->getType() != AI->getType()) { 1557bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1558bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1559bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 156040f9c302f23a35611cd354f40b22b37f2c554a40John McCall 156140f9c302f23a35611cd354f40b22b37f2c554a40John McCall // Add any parameter attributes. 156240f9c302f23a35611cd354f40b22b37f2c554a40John McCall if (llvm::Attributes PAttrs = AttrList.getParamAttributes(ArgNo + 1)) 156340f9c302f23a35611cd354f40b22b37f2c554a40John McCall AttrVec.push_back(llvm::AttributeWithIndex::get(ArgNo + 1, PAttrs)); 1564bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1565bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1566bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 15671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 156840f9c302f23a35611cd354f40b22b37f2c554a40John McCall if (llvm::Attributes FnAttrs = AttrList.getFnAttributes()) 156940f9c302f23a35611cd354f40b22b37f2c554a40John McCall AttrVec.push_back(llvm::AttributeWithIndex::get(~0, FnAttrs)); 157040f9c302f23a35611cd354f40b22b37f2c554a40John McCall 1571bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1572bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 15736ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif ArgList.append(CS.arg_begin(), CS.arg_begin() + ArgNo); 15744c7d9f1507d0f102bd4133bba63348636facd469Jay Foad llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList, "", CI); 1575bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1576ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1577bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 157840f9c302f23a35611cd354f40b22b37f2c554a40John McCall NewCall->setAttributes(llvm::AttrListPtr::get(AttrVec.begin(), 157940f9c302f23a35611cd354f40b22b37f2c554a40John McCall AttrVec.end())); 1580ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1581bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1582bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 158300549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 158400549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 15853b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1586c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner // Copy debug location attached to CI. 1587c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner if (!CI->getDebugLoc().isUnknown()) 1588c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner NewCall->setDebugLoc(CI->getDebugLoc()); 1589bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1590bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1591bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1592bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1593bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1594b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 1595b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 1596d26bc76c98006609002d9930f8840490e88ac5b5John McCall 15971f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall // Compute the function info and LLVM type. 1598d26bc76c98006609002d9930f8840490e88ac5b5John McCall const CGFunctionInfo &FI = getTypes().getFunctionInfo(GD); 15991f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall bool variadic = false; 16001f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall if (const FunctionProtoType *fpt = D->getType()->getAs<FunctionProtoType>()) 16011f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall variadic = fpt->isVariadic(); 16022acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *Ty = getTypes().GetFunctionType(FI, variadic); 1603d26bc76c98006609002d9930f8840490e88ac5b5John McCall 16049fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1605b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 16061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16070558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 16080558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 16090558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 16100558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 16110558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 16121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16140558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1615bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 16161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 161742745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1618bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 16190558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 162034809507232bc4c3c4840c7d092c7440219fddafChris Lattner 162162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 162262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 162362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 162462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 162562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 162662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 1627f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // (e.g. "int f(int x)"). Move the old function aside so that it 1628f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // doesn't interfere with GetAddrOfFunction. 16295f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner OldFn->setName(StringRef()); 1630b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 16311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1632bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1633bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1634bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 16359fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1636bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 16379fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 16389fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 16391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 164062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1641bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 16421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 16433c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1644bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1645bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 16461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 164762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1648bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 16491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16500558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1651bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 16521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1653112c967bd5c862a0f5d7913aa06700c048807db8John McCall // We need to set linkage and visibility on the function before 1654112c967bd5c862a0f5d7913aa06700c048807db8John McCall // generating code for it because various parts of IR generation 1655112c967bd5c862a0f5d7913aa06700c048807db8John McCall // want to propagate this information down (e.g. to local static 1656112c967bd5c862a0f5d7913aa06700c048807db8John McCall // declarations). 16570558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 16588b2423361648c39a7d8a3c5e8129e12006deac32John McCall setFunctionLinkage(D, Fn); 1659bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1660112c967bd5c862a0f5d7913aa06700c048807db8John McCall // FIXME: this is redundant with part of SetFunctionDefinitionAttributes 16610ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(Fn, D); 1662112c967bd5c862a0f5d7913aa06700c048807db8John McCall 1663d26bc76c98006609002d9930f8840490e88ac5b5John McCall CodeGenFunction(*this).GenerateCode(D, Fn, FI); 16646379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 16657c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 16667c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 16671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 166840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1669219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 167040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1671219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 167277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (D->hasAttr<AnnotateAttr>()) 167377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge AddGlobalAnnotations(D, Fn); 1674bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1675bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1676f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallvoid CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { 1677f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 167840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1679bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1680bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 16815f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(GD); 1682f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1683f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // If there is a definition in the module, then it wins over the alias. 1684f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // This is dubious, but allow it to be safe. Just ignore the alias. 1685f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 1686f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (Entry && !Entry->isDeclaration()) 1687f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return; 16881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16892acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1690bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1691bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1692bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1693bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1694bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 16951faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 16961faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 1697bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1698f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 169996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1700bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1701bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 17021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1703bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1704bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1705bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 17061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1707bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1708f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(Entry->isDeclaration()); 1709f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1710bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1711bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1712bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1713bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1714bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1715bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1716bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1717f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GA->takeName(Entry); 17181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17193c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1720bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1721bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1722f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall } else { 17239a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson GA->setName(MangledName); 1724bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 17251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17267c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 17277c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 17287c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 172940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 17307c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 17317c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 173206a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (FD->hasBody()) 17337c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 17347c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 17357c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 17367c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 17371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 173811e8ce7380856abee188b237c2600272df2ed09dRafael Espindola D->hasAttr<WeakRefAttr>() || 17390a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor D->isWeakImported()) { 17407c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 17417c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 17427c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 17437c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1744bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1745bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 17468dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID, 17472d3ba4f5a923a90c3fc290ddfba5e36c2d0a9b46Chris Lattner ArrayRef<llvm::Type*> Tys) { 1748df983a8bcbbcea911b8dce283f044787df119d50Jay Foad return llvm::Intrinsic::getDeclaration(&getModule(), (llvm::Intrinsic::ID)IID, 17498dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramer Tys); 17507acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1751bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 17521d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 17531d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 17541d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 175570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 17561d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 17571d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 17585f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef String = Literal->getString(); 17592f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer unsigned NumBytes = String.size(); 17601d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1761f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1762f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1763f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 17642f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer return Map.GetOrCreateValue(String); 1765f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1766f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 17671d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 17685f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<UTF16, 128> ToBuf(NumBytes); 17692f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer const UTF8 *FromPtr = (UTF8 *)String.data(); 17701d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 17711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1772e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian (void)ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 1773e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian &ToPtr, ToPtr + NumBytes, 1774e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian strictConversion); 17751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 177670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 17771d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 177870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 177970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 178070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 178170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 178270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 178370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 178470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 178570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 178670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 178770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 178870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 178970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 179070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 179170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 179270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 179370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 179470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1795434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1796434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1797434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 179870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 17991d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 18005f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner return Map.GetOrCreateValue(StringRef(AsBytes.data(), AsBytes.size())); 18011d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 18021d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1803cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanianstatic llvm::StringMapEntry<llvm::Constant*> & 1804cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz JahanianGetConstantStringEntry(llvm::StringMap<llvm::Constant*> &Map, 1805cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian const StringLiteral *Literal, 1806cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian unsigned &StringLength) 1807cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian{ 18085f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef String = Literal->getString(); 1809cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian StringLength = String.size(); 1810cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian return Map.GetOrCreateValue(String); 1811cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian} 1812cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian 18131d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 18141d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 18151d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 18161d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 18171d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 18181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 181970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 182070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 18211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18221d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 18231d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 18241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18250032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 18260032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 18273e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 18281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18299d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1830c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 18312acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 183296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 18331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 18349d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 18353e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 18363e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 1837a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad llvm::ConstantExpr::getGetElementPtr(GV, Zeros); 1838c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 18391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1840e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 18413e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 18422acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::StructType *STy = 1843e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1844e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 18451d236ab930816f5da27bade92904914c44b73b4cBenjamin Kramer llvm::Constant *Fields[4]; 184644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1847c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 18485add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 18491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1850c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 18512acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 18521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 18535add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 18545add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1855c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 1856ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner llvm::Constant *C = llvm::ConstantDataArray::getString(VMContext, 1857ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner Entry.getKey()); 1858a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 185995b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 18601bf7a3fcc4e2ad30688f7b0db464ad1ccabe77e2Bill Wendling if (isUTF16) 1861278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 186295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 18631bf7a3fcc4e2ad30688f7b0db464ad1ccabe77e2Bill Wendling else 1864584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // FIXME: With OS X ld 123.2 (xcode 4) and LTO we would get a linker error 1865584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // when using private linkage. It is not clear if this is a bug in ld 1866584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // or a reasonable new restriction. 1867dc0f137295bc7ec5b231ff1842388f149f43c0c8Rafael Espindola Linkage = llvm::GlobalValue::LinkerPrivateLinkage; 1868278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 18691bf7a3fcc4e2ad30688f7b0db464ad1ccabe77e2Bill Wendling // Note: -fwritable-strings doesn't make the backing store strings of 18701bf7a3fcc4e2ad30688f7b0db464ad1ccabe77e2Bill Wendling // CFStrings writable. (See <rdar://problem/10657500>) 18711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 18721bf7a3fcc4e2ad30688f7b0db464ad1ccabe77e2Bill Wendling new llvm::GlobalVariable(getModule(), C->getType(), /*isConstant=*/true, 18731bf7a3fcc4e2ad30688f7b0db464ad1ccabe77e2Bill Wendling Linkage, C, ".str"); 1874b266a1fce09ab4ee7033268199509aacfbef056aRafael Espindola GV->setUnnamedAddr(true); 1875a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 18764da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 18774da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck GV->setAlignment(Align.getQuantity()); 1878f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar } else { 1879f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar CharUnits Align = getContext().getTypeAlignInChars(getContext().CharTy); 1880f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar GV->setAlignment(Align.getQuantity()); 1881a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1882a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros); 18835add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1884c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1885c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 18865add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 18871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1888c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 188908e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 18901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 18911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 189295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 1893bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor if (const char *Sect = getContext().getTargetInfo().getCFStringSection()) 18948e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 18951d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 18961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18970c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1898c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 189945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 190045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregorstatic RecordDecl * 190145c4ea75b235de94f44bf96843624e6a559e4c00Douglas GregorCreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 190245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor DeclContext *DC, IdentifierInfo *Id) { 190345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor SourceLocation Loc; 190445c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor if (Ctx.getLangOptions().CPlusPlus) 190545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 190645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor else 190745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 190845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor} 190945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 191033e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanianllvm::Constant * 19114c73307c74764ba99e1379677fe92af72f676531Fariborz JahanianCodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) { 19122bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian unsigned StringLength = 0; 19132bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::StringMapEntry<llvm::Constant*> &Entry = 1914cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian GetConstantStringEntry(CFConstantStringMap, Literal, StringLength); 19152bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19162bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (llvm::Constant *C = Entry.getValue()) 19172bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return C; 19182bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19192bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zero = 19202bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 19212bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zeros[] = { Zero, Zero }; 19222bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 1923ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian // If we don't already have it, get _NSConstantStringClassReference. 19244c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (!ConstantStringClassRef) { 19254c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string StringClass(getLangOptions().ObjCConstantStringClass); 19262acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 19274c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::Constant *GV; 19286f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian if (Features.ObjCNonFragileABI) { 192925dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian std::string str = 193025dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian StringClass.empty() ? "OBJC_CLASS_$_NSConstantString" 193125dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian : "OBJC_CLASS_$_" + StringClass; 19326f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian GV = getObjCRuntime().GetClassGlobal(str); 19336f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian // Make sure the result is of the correct type. 19342acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 19356f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian ConstantStringClassRef = 19366f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian llvm::ConstantExpr::getBitCast(GV, PTy); 19376f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian } else { 193825dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian std::string str = 193925dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian StringClass.empty() ? "_NSConstantStringClassReference" 194025dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian : "_" + StringClass + "ClassReference"; 19412acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *PTy = llvm::ArrayType::get(Ty, 0); 194225dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian GV = CreateRuntimeVariable(PTy, str); 19436f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian // Decay array -> ptr 19446f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian ConstantStringClassRef = 1945a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad llvm::ConstantExpr::getGetElementPtr(GV, Zeros); 19464c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian } 19472bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 194845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 194945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor if (!NSConstantStringType) { 195045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // Construct the type for a constant NSString. 195145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor RecordDecl *D = CreateRecordDecl(Context, TTK_Struct, 195245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor Context.getTranslationUnitDecl(), 195345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor &Context.Idents.get("__builtin_NSString")); 195445c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor D->startDefinition(); 195545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 195645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor QualType FieldTypes[3]; 195745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 195845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // const int *isa; 195945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldTypes[0] = Context.getPointerType(Context.IntTy.withConst()); 196045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // const char *str; 196145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldTypes[1] = Context.getPointerType(Context.CharTy.withConst()); 196245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // unsigned int length; 196345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldTypes[2] = Context.UnsignedIntTy; 196445c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 196545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // Create fields 196645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor for (unsigned i = 0; i < 3; ++i) { 196745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldDecl *Field = FieldDecl::Create(Context, D, 196845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor SourceLocation(), 196945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor SourceLocation(), 0, 197045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldTypes[i], /*TInfo=*/0, 197145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor /*BitWidth=*/0, 197245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor /*Mutable=*/false, 197345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor /*HasInit=*/false); 197445c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor Field->setAccess(AS_public); 197545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor D->addDecl(Field); 197645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor } 197745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 197845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor D->completeDefinition(); 197945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor QualType NSTy = Context.getTagDeclType(D); 198045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor NSConstantStringType = cast<llvm::StructType>(getTypes().ConvertType(NSTy)); 198145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor } 19822bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19831d236ab930816f5da27bade92904914c44b73b4cBenjamin Kramer llvm::Constant *Fields[3]; 19842bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19852bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Class pointer. 19864c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Fields[0] = ConstantStringClassRef; 19872bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19882bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String pointer. 1989ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner llvm::Constant *C = 1990ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner llvm::ConstantDataArray::getString(VMContext, Entry.getKey()); 19912bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19922bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage; 19932bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isConstant; 1994cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian Linkage = llvm::GlobalValue::PrivateLinkage; 1995cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian isConstant = !Features.WritableStrings; 19962bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19972bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable *GV = 19982bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 19992bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian ".str"); 2000803d307a5385059b1a84dfe9706ab158c80a20dcRafael Espindola GV->setUnnamedAddr(true); 2001cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian CharUnits Align = getContext().getTypeAlignInChars(getContext().CharTy); 2002cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian GV->setAlignment(Align.getQuantity()); 2003a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros); 20042bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 20052bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String length. 20062acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 20072bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[2] = llvm::ConstantInt::get(Ty, StringLength); 20082bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 20092bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // The struct. 201045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor C = llvm::ConstantStruct::get(NSConstantStringType, Fields); 20112bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 20122bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable::PrivateLinkage, C, 20132bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian "_unnamed_nsstring_"); 20142bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME. Fix section. 2015ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian if (const char *Sect = 2016ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian Features.ObjCNonFragileABI 2017bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor ? getContext().getTargetInfo().getNSStringNonFragileABISection() 2018bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor : getContext().getTargetInfo().getNSStringSection()) 20192bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setSection(Sect); 20202bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Entry.setValue(GV); 20212bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 20222bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return GV; 202333e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian} 202433e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian 20250815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas GregorQualType CodeGenModule::getObjCFastEnumerationStateType() { 20260815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor if (ObjCFastEnumerationStateType.isNull()) { 20270815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor RecordDecl *D = CreateRecordDecl(Context, TTK_Struct, 20280815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.getTranslationUnitDecl(), 20290815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor &Context.Idents.get("__objcFastEnumerationState")); 20300815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor D->startDefinition(); 20310815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 20320815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor QualType FieldTypes[] = { 20330815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.UnsignedLongTy, 20340815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.getPointerType(Context.getObjCIdType()), 20350815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.getPointerType(Context.UnsignedLongTy), 20360815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.getConstantArrayType(Context.UnsignedLongTy, 20370815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor llvm::APInt(32, 5), ArrayType::Normal, 0) 20380815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor }; 20390815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 20400815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor for (size_t i = 0; i < 4; ++i) { 20410815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor FieldDecl *Field = FieldDecl::Create(Context, 20420815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor D, 20430815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor SourceLocation(), 20440815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor SourceLocation(), 0, 20450815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor FieldTypes[i], /*TInfo=*/0, 20460815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor /*BitWidth=*/0, 20470815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor /*Mutable=*/false, 20480815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor /*HasInit=*/false); 20490815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Field->setAccess(AS_public); 20500815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor D->addDecl(Field); 20510815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor } 20520815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 20530815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor D->completeDefinition(); 20540815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor ObjCFastEnumerationStateType = Context.getTagDeclType(D); 20550815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor } 20560815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 20570815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor return ObjCFastEnumerationStateType; 20580815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor} 20590815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 20606143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 20611e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 20626143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 206364f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman assert((E->isAscii() || E->isUTF8()) 206464f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman && "Use GetConstantArrayFromStringLiteral for wide strings"); 20653b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck const ASTContext &Context = getContext(); 20661e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 20673b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck Context.getAsConstantArrayType(E->getType()); 20681e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 20691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2070dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 20711e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 20721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20732f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer std::string Str = E->getString().str(); 20741e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 20751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20761e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 20771e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 20781e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 207964f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedmanllvm::Constant * 208064f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli FriedmanCodeGenModule::GetConstantArrayFromStringLiteral(const StringLiteral *E) { 208164f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman assert(!E->getType()->isPointerType() && "Strings are always arrays"); 208264f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman 208364f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman // Don't emit it as the address of the string, emit the string data itself 208464f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman // as an inline array. 208564f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman if (E->getCharByteWidth()==1) { 2086ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner return llvm::ConstantDataArray::getString(VMContext, 208764f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman GetStringForStringLiteral(E), false); 208864f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman } 2089ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner 2090ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner llvm::ArrayType *AType = 2091ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner cast<llvm::ArrayType>(getTypes().ConvertType(E->getType())); 2092ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner llvm::Type *ElemTy = AType->getElementType(); 2093ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner unsigned NumElements = AType->getNumElements(); 2094ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner std::vector<llvm::Constant*> Elts; 2095ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner Elts.reserve(NumElements); 2096ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner 2097ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner for(unsigned i=0;i<E->getLength();++i) { 2098ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner unsigned value = E->getCodeUnit(i); 2099ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner llvm::Constant *C = llvm::ConstantInt::get(ElemTy,value,false); 2100ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner Elts.push_back(C); 2101ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner } 2102ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner for(unsigned i=E->getLength();i<NumElements;++i) { 2103ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner llvm::Constant *C = llvm::ConstantInt::get(ElemTy,0,false); 2104ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner Elts.push_back(C); 2105ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner } 2106ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner 2107ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner return llvm::ConstantArray::get(AType, Elts); 210864f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman} 210964f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman 21106143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 21116143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 21126143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 21136143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 21146143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 21157eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 2116a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall CharUnits Align = getContext().getTypeAlignInChars(S->getType()); 211764f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman if (S->isAscii() || S->isUTF8()) { 211864f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman return GetAddrOfConstantString(GetStringForStringLiteral(S), 211964f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman /* GlobalName */ 0, 212064f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman Align.getQuantity()); 21217eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 212264f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman 212364f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman // FIXME: the following does not memoize wide strings 212464f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman llvm::Constant *C = GetConstantArrayFromStringLiteral(S); 212564f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman llvm::GlobalVariable *GV = 212664f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman new llvm::GlobalVariable(getModule(),C->getType(), 212764f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman !Features.WritableStrings, 212864f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman llvm::GlobalValue::PrivateLinkage, 212964f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman C,".str"); 21307d6a7c004361c45a463874a58da28d9f3c35f2e6Seth Cantrell 213164f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman GV->setAlignment(Align.getQuantity()); 213264f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman GV->setUnnamedAddr(true); 213364f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman 213464f45a24b19eb89ff88f7c3ff0df9be8e861ac97Eli Friedman return GV; 21356143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 21366143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 2137eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 2138eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 2139eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 2140eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 2141eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 2142eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 2143a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 2144a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 2145eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 2146eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 2147eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 2148a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 2149a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCallstatic llvm::GlobalVariable *GenerateStringLiteral(StringRef str, 215045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 21515fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 2152a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall const char *GlobalName, 2153a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall unsigned Alignment) { 21546143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 21550032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 2156ff8f9ec8336c62b5e3504e2a394f4b25c0cb1963Chris Lattner llvm::ConstantDataArray::getString(CGM.getLLVMContext(), str, false); 21571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 215845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 21591257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalVariable *GV = 21601257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 21611257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalValue::PrivateLinkage, 21621257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola C, GlobalName); 2163a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall GV->setAlignment(Alignment); 21641257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola GV->setUnnamedAddr(true); 21651257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola return GV; 216645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 216745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 21686143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 21696143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 21706143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 21716143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 21726143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 21736143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 21746143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 21756143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 21765f9e272e632e951b1efe824cd16acb4d96077930Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfConstantString(StringRef Str, 2177a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall const char *GlobalName, 2178a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall unsigned Alignment) { 21798e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 21808e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 21818e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 21828e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 218395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 21848e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 21858e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 21868e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 2187a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall return GenerateStringLiteral(Str, false, *this, GlobalName, Alignment); 21881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2189a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall llvm::StringMapEntry<llvm::GlobalVariable *> &Entry = 21909de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer ConstantStringMap.GetOrCreateValue(Str); 219145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 2192a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall if (llvm::GlobalVariable *GV = Entry.getValue()) { 2193a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall if (Alignment > GV->getAlignment()) { 2194a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall GV->setAlignment(Alignment); 2195a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall } 2196a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall return GV; 2197a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall } 219845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 219945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 2200a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall llvm::GlobalVariable *GV = GenerateStringLiteral(Str, true, *this, GlobalName, Alignment); 2201a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall Entry.setValue(GV); 2202a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall return GV; 220345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 22046143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 22056143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 22069de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer/// array containing the literal and a terminating '\0' 22076143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 22089de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramerllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &Str, 2209a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall const char *GlobalName, 2210a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall unsigned Alignment) { 22115f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef StrWithNull(Str.c_str(), Str.size() + 1); 2212a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall return GetAddrOfConstantString(StrWithNull, GlobalName, Alignment); 22136143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 221441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 2215af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 2216af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 22171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 2218af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 22191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 222017945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 2221af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 22221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2223af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 2224af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 2225af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 2226af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 2227af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 2228af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 2229af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 2230af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 2231af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 223217945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 2233fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 2234fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 2235af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 223617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 2237fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 2238fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 2239af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 2240af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 2241af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 2242af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 2243e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCallstatic bool needsDestructMethod(ObjCImplementationDecl *impl) { 2244db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose const ObjCInterfaceDecl *iface = impl->getClassInterface(); 2245db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose for (const ObjCIvarDecl *ivar = iface->all_declared_ivar_begin(); 2246e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ivar; ivar = ivar->getNextIvar()) 2247e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall if (ivar->getType().isDestructedType()) 2248e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall return true; 2249e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 2250e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall return false; 2251e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall} 2252e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 2253109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// EmitObjCIvarInitializations - Emit information for ivar initialization 2254109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// for an implementation. 2255109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanianvoid CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { 2256e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // We might need a .cxx_destruct even if we don't have any ivar initializers. 2257e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall if (needsDestructMethod(D)) { 2258e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); 2259e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 2260e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCMethodDecl *DTORMethod = 2261e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCMethodDecl::Create(getContext(), D->getLocation(), D->getLocation(), 226275cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis cxxSelector, getContext().VoidTy, 0, D, 226375cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isInstance=*/true, /*isVariadic=*/false, 226475cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isSynthesized=*/true, /*isImplicitlyDeclared=*/true, 226575cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isDefined=*/false, ObjCMethodDecl::Required); 2266e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall D->addInstanceMethod(DTORMethod); 2267e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); 2268f85e193739c953358c865005855253af4f68a497John McCall D->setHasCXXStructors(true); 2269e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall } 2270e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 2271e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // If the implementation doesn't have any ivar initializers, we don't need 2272e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // a .cxx_construct. 2273827bbcc8a9115782693b21030a45378abe5c1862David Chisnall if (D->getNumIvarInitializers() == 0) 2274109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian return; 2275109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 2276e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall IdentifierInfo *II = &getContext().Idents.get(".cxx_construct"); 2277e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 2278109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian // The constructor returns 'self'. 2279109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), 2280109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 228111d77169555480ee0a04c6e5bc390d8fde41175dArgyrios Kyrtzidis D->getLocation(), 228211d77169555480ee0a04c6e5bc390d8fde41175dArgyrios Kyrtzidis cxxSelector, 2283109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().getObjCIdType(), 0, 228475cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis D, /*isInstance=*/true, 228575cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isVariadic=*/false, 228675cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isSynthesized=*/true, 228775cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isImplicitlyDeclared=*/true, 228875cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isDefined=*/false, 2289109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 2290109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(CTORMethod); 2291109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); 2292f85e193739c953358c865005855253af4f68a497John McCall D->setHasCXXStructors(true); 2293109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian} 2294109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 229591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 2296984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 229717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 2298984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 2299984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 2300984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 2301984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 230291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 230391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 2304f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 2305f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 230691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 230791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 230891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 230991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 231017945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 231191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 231291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 231391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 231491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 231541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 231641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 231741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 231841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 231941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 232041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 232141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 232241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 232316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 232416e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 232516e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 23261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 232741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 2328293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 23292b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 233041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 233116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 23328387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() || 23338387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet cast<FunctionDecl>(D)->isLateTemplateParsed()) 233416e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 23351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2336555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 2337555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 2338555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 233941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 2340555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 234141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 234241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 234326fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall // Indirect fields from global anonymous structs and unions can be 234426fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall // ignored; only the actual variable requires IR gen support. 234526fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall case Decl::IndirectField: 234626fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall break; 234726fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall 234895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 234941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 2350984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 235141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 23529cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 23539d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 23549cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 2355dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 2356127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 2357127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 23583e4c6c4c79a03f5cb0c4671d7c282d623c6dc35eRichard Smith case Decl::TypeAliasTemplate: 2359018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 23606a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor case Decl::Block: 236115de72cf580840c61e5704c2f8a2b56f9d0638e1Douglas Gregor case Decl::Import: 23629cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 236395d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 23641fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 23658387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() || 23668387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet cast<FunctionDecl>(D)->isLateTemplateParsed()) 23671fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 23681fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 236995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 237095d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 237127ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 23728387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->isLateTemplateParsed()) 23738387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet return; 237427ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 237527ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 237636674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 237736674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 237836674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 237936674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 238036674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 238195d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 23821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 238338e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 2384b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 238541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 2386000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 2387baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner case Decl::ObjCCategory: { 2388baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D); 2389baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner if (CD->IsClassExtension() && CD->hasSynthBitfield()) 2390baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner Context.ResetObjCLayout(CD->getClassInterface()); 2391baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner break; 2392baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner } 2393285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 2394bd9482d859a74bf2c45ef8b8aedec61c0e1c8374Douglas Gregor case Decl::ObjCProtocol: { 2395bd9482d859a74bf2c45ef8b8aedec61c0e1c8374Douglas Gregor ObjCProtocolDecl *Proto = cast<ObjCProtocolDecl>(D); 2396bd9482d859a74bf2c45ef8b8aedec61c0e1c8374Douglas Gregor if (Proto->isThisDeclarationADefinition()) 2397bd9482d859a74bf2c45ef8b8aedec61c0e1c8374Douglas Gregor ObjCRuntime->GenerateProtocol(Proto); 239841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 2399bd9482d859a74bf2c45ef8b8aedec61c0e1c8374Douglas Gregor } 2400bd9482d859a74bf2c45ef8b8aedec61c0e1c8374Douglas Gregor 240141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 2402af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 2403af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 2404e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 240541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 240641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 2407af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 2408af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 2409000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (Features.ObjCNonFragileABI2 && OMD->hasSynthBitfield()) 2410000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(OMD->getClassInterface()); 2411af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 2412109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian EmitObjCIvarInitializations(OMD); 2413e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime->GenerateClass(OMD); 241441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 24151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 241641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 241741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 241841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 24196fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 242041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 242141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 242241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 24231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 242429254f4dd114fe2dd5c4e7a261ebea941973ad3dDavid Chisnall ObjCRuntime->RegisterAlias(cast<ObjCCompatibleAliasDecl>(D)); 242541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 242641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 242791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 242891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 242941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 243041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 243141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 243241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 24335f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef AsmString = AD->getAsmString()->getString(); 24341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 243541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 243641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 243741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 24389f5bff086cad25c15b4deb8a7763786097aadccdChris Lattner else if (*--S.end() == '\n') 24399f5bff086cad25c15b4deb8a7763786097aadccdChris Lattner getModule().setModuleInlineAsm(S + AsmString.str()); 244041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 24418d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 244241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 244341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 24441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 2446f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 2447f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 2448f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 244941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 245041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 245141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 2452744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2453744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Turns the given pointer into a constant. 2454744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, 2455744016dde06fcffd50931e94a98c850f8b12cd87John McCall const void *Ptr) { 2456744016dde06fcffd50931e94a98c850f8b12cd87John McCall uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); 24572acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *i64 = llvm::Type::getInt64Ty(Context); 2458744016dde06fcffd50931e94a98c850f8b12cd87John McCall return llvm::ConstantInt::get(i64, PtrInt); 2459744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2460744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2461744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic void EmitGlobalDeclMetadata(CodeGenModule &CGM, 2462744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *&GlobalMetadata, 2463744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl D, 2464744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr) { 2465744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (!GlobalMetadata) 2466744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata = 2467744016dde06fcffd50931e94a98c850f8b12cd87John McCall CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); 2468744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2469744016dde06fcffd50931e94a98c850f8b12cd87John McCall // TODO: should we report variant information for ctors/dtors? 2470744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Ops[] = { 2471744016dde06fcffd50931e94a98c850f8b12cd87John McCall Addr, 2472744016dde06fcffd50931e94a98c850f8b12cd87John McCall GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) 2473744016dde06fcffd50931e94a98c850f8b12cd87John McCall }; 24746f141659cab11109d9931d92d0988f8850778de3Jay Foad GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops)); 2475744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2476744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2477744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes associating all the global values in the 2478744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// current module with the Decls they came from. This is useful for 2479744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// projects using IR gen as a subroutine. 2480744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// 2481744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Since there's currently no way to associate an MDNode directly 2482744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with an llvm::GlobalValue, we create a global named metadata 2483744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with the name 'clang.global.decl.ptrs'. 2484744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenModule::EmitDeclMetadata() { 2485744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2486744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2487744016dde06fcffd50931e94a98c850f8b12cd87John McCall // StaticLocalDeclMap 24885f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner for (llvm::DenseMap<GlobalDecl,StringRef>::iterator 2489744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = MangledDeclNames.begin(), E = MangledDeclNames.end(); 2490744016dde06fcffd50931e94a98c850f8b12cd87John McCall I != E; ++I) { 2491744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); 2492744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); 2493744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2494744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2495744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2496744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes for all the local variables in the current 2497744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// function. 2498744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenFunction::EmitDeclMetadata() { 2499744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (LocalDeclMap.empty()) return; 2500744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2501744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::LLVMContext &Context = getLLVMContext(); 2502744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2503744016dde06fcffd50931e94a98c850f8b12cd87John McCall // Find the unique metadata ID for this name. 2504744016dde06fcffd50931e94a98c850f8b12cd87John McCall unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); 2505744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2506744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2507744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2508744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator 2509744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { 2510744016dde06fcffd50931e94a98c850f8b12cd87John McCall const Decl *D = I->first; 2511744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Addr = I->second; 2512744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2513744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { 2514744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); 25156f141659cab11109d9931d92d0988f8850778de3Jay Foad Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, DAddr)); 2516744016dde06fcffd50931e94a98c850f8b12cd87John McCall } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { 2517744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); 2518744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); 2519744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2520744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2521744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2522673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 25233dc05418538c719fea48b906bfa4febe5296e126Nick Lewyckyvoid CodeGenModule::EmitCoverageFile() { 25243dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky if (!getCodeGenOpts().CoverageFile.empty()) { 25255ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky if (llvm::NamedMDNode *CUNode = TheModule.getNamedMetadata("llvm.dbg.cu")) { 25265ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::NamedMDNode *GCov = TheModule.getOrInsertNamedMetadata("llvm.gcov"); 25275ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::LLVMContext &Ctx = TheModule.getContext(); 25283dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::MDString *CoverageFile = 25293dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::MDString::get(Ctx, getCodeGenOpts().CoverageFile); 25305ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky for (int i = 0, e = CUNode->getNumOperands(); i != e; ++i) { 25315ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::MDNode *CU = CUNode->getOperand(i); 25323dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::Value *node[] = { CoverageFile, CU }; 25335ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::MDNode *N = llvm::MDNode::get(Ctx, node); 25345ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky GCov->addOperand(N); 25355ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 25365ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 25375ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 25385ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky} 2539