CodeGenModule.cpp revision b219cfc4d75f0a03630b7c4509ef791b7e97b2c8
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" 194c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall#include "CGCXXABI.h" 20af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar#include "CGObjCRuntime.h" 218c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne#include "CGOpenCLRuntime.h" 2282d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov#include "TargetInfo.h" 2306057cef0bcd7804e80f3ce2bbe352178396c715Chandler Carruth#include "clang/Frontend/CodeGenOptions.h" 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 25687cc4a850b59116efee061018f0d8df50728b82Ken Dyck#include "clang/AST/CharUnits.h" 26c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2721ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 28af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor#include "clang/AST/DeclTemplate.h" 2914110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne#include "clang/AST/Mangle.h" 301a5e0d7f18485e4fb958f96dcddff3e4486a4069Anders Carlsson#include "clang/AST/RecordLayout.h" 312c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner#include "clang/Basic/Diagnostic.h" 328bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman#include "clang/Basic/SourceManager.h" 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 34e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff#include "clang/Basic/ConvertUTF.h" 35ec9426ca6039279bcc99bc2c625bb2abe4f0353dNate Begeman#include "llvm/CallingConv.h" 36bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner#include "llvm/Module.h" 375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/Intrinsics.h" 38d5b8902c0329d80a216803b58dc3b689349a0c11Chris Lattner#include "llvm/LLVMContext.h" 396374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall#include "llvm/ADT/Triple.h" 40c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola#include "llvm/Target/Mangler.h" 4120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 426ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif#include "llvm/Support/CallSite.h" 4378f7ece00e2ddfb64d4ed72a7be770b5b9b805e3Chris Lattner#include "llvm/Support/ErrorHandling.h" 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougestatic const char AnnotationSection[] = "llvm.metadata"; 4877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 49f16aa103d3afd42fbca2ab346f191bf745cec092John McCallstatic CGCXXABI &createCXXABI(CodeGenModule &CGM) { 50bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor switch (CGM.getContext().getTargetInfo().getCXXABI()) { 51f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_ARM: return *CreateARMCXXABI(CGM); 52f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_Itanium: return *CreateItaniumCXXABI(CGM); 53f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_Microsoft: return *CreateMicrosoftCXXABI(CGM); 54f16aa103d3afd42fbca2ab346f191bf745cec092John McCall } 55f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 56f16aa103d3afd42fbca2ab346f191bf745cec092John McCall llvm_unreachable("invalid C++ ABI kind"); 57f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return *CreateItaniumCXXABI(CGM); 58f16aa103d3afd42fbca2ab346f191bf745cec092John McCall} 59f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 612811ccf48d6d898c42cc4cfad37abedb36236d20Chandler CarruthCodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, 62468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall llvm::Module &M, const llvm::TargetData &TD, 63468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall Diagnostic &diags) 64d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall : Context(C), Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), 65468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags), 66f16aa103d3afd42fbca2ab346f191bf745cec092John McCall ABI(createCXXABI(*this)), 6708d4792bb5d9e0e7f122c6273636807029c06aaaDaniel Dunbar Types(C, M, TD, getTargetCodeGenInfo().getABIInfo(), ABI, CGO), 683d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman TBAA(0), 698c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne VTables(*this), ObjCRuntime(0), OpenCLRuntime(0), DebugInfo(0), ARCData(0), 708c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne RRData(0), CFConstantStringClassRef(0), ConstantStringClassRef(0), 7145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor NSConstantStringType(0), 72673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar VMContext(M.getContext()), 73673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar NSConcreteGlobalBlock(0), NSConcreteStackBlock(0), 74d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall BlockObjectAssign(0), BlockObjectDispose(0), 75d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall BlockDescriptorType(0), GenericBlockLiteralType(0) { 7660be607e5d71627bf3dab8f51c3fdca74267c692David Chisnall if (Features.ObjC1) 778c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne createObjCRuntime(); 788c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne if (Features.OpenCL) 798c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne createOpenCLRuntime(); 80e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 813d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman // Enable TBAA unless it's suppressed. 823d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!CodeGenOpts.RelaxedAliasing && CodeGenOpts.OptimizationLevel > 0) 830b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman TBAA = new CodeGenTBAA(Context, VMContext, getLangOptions(), 840b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman ABI.getMangleContext()); 853d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 86e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky // If debug info or coverage generation is enabled, create the CGDebugInfo 87e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky // object. 88e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky if (CodeGenOpts.DebugInfo || CodeGenOpts.EmitGcovArcs || 89e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky CodeGenOpts.EmitGcovNotes) 90e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky DebugInfo = new CGDebugInfo(*this); 91d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall 92d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall Block.GlobalUniqueCount = 0; 935936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall 94f85e193739c953358c865005855253af4f68a497John McCall if (C.getLangOptions().ObjCAutoRefCount) 95f85e193739c953358c865005855253af4f68a497John McCall ARCData = new ARCEntrypoints(); 96f85e193739c953358c865005855253af4f68a497John McCall RRData = new RREntrypoints(); 97f85e193739c953358c865005855253af4f68a497John McCall 985936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall // Initialize the type cache. 995936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall llvm::LLVMContext &LLVMContext = M.getContext(); 1000774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall VoidTy = llvm::Type::getVoidTy(LLVMContext); 1010774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int8Ty = llvm::Type::getInt8Ty(LLVMContext); 1020774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int32Ty = llvm::Type::getInt32Ty(LLVMContext); 1030774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int64Ty = llvm::Type::getInt64Ty(LLVMContext); 104bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor PointerWidthInBits = C.getTargetInfo().getPointerWidth(0); 10534695856c0e67b3765b46304cc71b5d2cd5b71c7John McCall PointerAlignInBytes = 106bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor C.toCharUnitsFromBits(C.getTargetInfo().getPointerAlign(0)).getQuantity(); 107bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor IntTy = llvm::IntegerType::get(LLVMContext, C.getTargetInfo().getIntWidth()); 1085936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall IntPtrTy = llvm::IntegerType::get(LLVMContext, PointerWidthInBits); 1095936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8PtrTy = Int8Ty->getPointerTo(0); 1105936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8PtrPtrTy = Int8PtrTy->getPointerTo(0); 1112b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 1122b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 1132b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 114e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne delete ObjCRuntime; 1158c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne delete OpenCLRuntime; 116f16aa103d3afd42fbca2ab346f191bf745cec092John McCall delete &ABI; 1174376c85fb0ac9e7fd779d246efc77e1169179138Dan Gohman delete TBAA; 118815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 119f85e193739c953358c865005855253af4f68a497John McCall delete ARCData; 120f85e193739c953358c865005855253af4f68a497John McCall delete RRData; 121815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 122815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 1230d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnallvoid CodeGenModule::createObjCRuntime() { 1240d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall if (!Features.NeXTRuntime) 125e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime = CreateGNUObjCRuntime(*this); 1260d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else 127e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime = CreateMacObjCRuntime(*this); 1280d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall} 1290d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall 1308c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbournevoid CodeGenModule::createOpenCLRuntime() { 1318c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne OpenCLRuntime = new CGOpenCLRuntime(*this); 1328c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne} 1338c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne 134815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 13582227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 1366c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalInitFunc(); 137efb0fa9e11f75af51744a6159530ef7cc8efa24aDaniel Dunbar EmitCXXGlobalDtorFunc(); 138e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne if (ObjCRuntime) 139e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne if (llvm::Function *ObjCInitFunction = ObjCRuntime->ModuleInitFunction()) 140208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 1416bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 1426bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 14377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge EmitGlobalAnnotations(); 1440269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 145744016dde06fcffd50931e94a98c850f8b12cd87John McCall 146b25938303de0976b9f189363d43033e5788e3d36John McCall SimplifyPersonality(); 147b25938303de0976b9f189363d43033e5788e3d36John McCall 148744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (getCodeGenOpts().EmitDeclMetadata) 149744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitDeclMetadata(); 1505ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky 1515ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky if (getCodeGenOpts().EmitGcovArcs || getCodeGenOpts().EmitGcovNotes) 1523dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky EmitCoverageFile(); 153f391dbe39dca85f2a2c6ea558811dacc571c223eDevang Patel 154f391dbe39dca85f2a2c6ea558811dacc571c223eDevang Patel if (DebugInfo) 155f391dbe39dca85f2a2c6ea558811dacc571c223eDevang Patel DebugInfo->finalize(); 156f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 157f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 158e80d56771736c85fd8365c394a6731923b17e91dDevang Patelvoid CodeGenModule::UpdateCompletedType(const TagDecl *TD) { 159e80d56771736c85fd8365c394a6731923b17e91dDevang Patel // Make sure that this type is translated. 160e80d56771736c85fd8365c394a6731923b17e91dDevang Patel Types.UpdateCompletedType(TD); 161e80d56771736c85fd8365c394a6731923b17e91dDevang Patel if (DebugInfo) 162e80d56771736c85fd8365c394a6731923b17e91dDevang Patel DebugInfo->UpdateCompletedType(TD); 163e80d56771736c85fd8365c394a6731923b17e91dDevang Patel} 164e80d56771736c85fd8365c394a6731923b17e91dDevang Patel 1653d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanllvm::MDNode *CodeGenModule::getTBAAInfo(QualType QTy) { 1663d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!TBAA) 1673d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return 0; 1683d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return TBAA->getTBAAInfo(QTy); 1693d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1703d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1713d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanvoid CodeGenModule::DecorateInstruction(llvm::Instruction *Inst, 1723d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman llvm::MDNode *TBAAInfo) { 1733d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman Inst->setMetadata(llvm::LLVMContext::MD_tbaa, TBAAInfo); 1743d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1753d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1766374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCallbool CodeGenModule::isTargetDarwin() const { 177bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor return getContext().getTargetInfo().getTriple().isOSDarwin(); 1786374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall} 1796374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 1805f9e272e632e951b1efe824cd16acb4d96077930Chris Lattnervoid CodeGenModule::Error(SourceLocation loc, StringRef error) { 18132096695c76033a6b0b1747c439f7378a11e8312John McCall unsigned diagID = getDiags().getCustomDiagID(Diagnostic::Error, error); 18232096695c76033a6b0b1747c439f7378a11e8312John McCall getDiags().Report(Context.getFullLoc(loc), diagID); 18332096695c76033a6b0b1747c439f7378a11e8312John McCall} 18432096695c76033a6b0b1747c439f7378a11e8312John McCall 185488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 1862c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 18790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 18890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 18990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 19090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 19256b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 1932c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 1940a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 1950a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 1962c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 19758c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 198488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 199c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 20090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 20190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 20290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 20390df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 2041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 20556b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 206c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 2070a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 208c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 209c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 210bc8d40d85f3fa1e34569834916f18fecaa635152John McCallllvm::ConstantInt *CodeGenModule::getSize(CharUnits size) { 211bc8d40d85f3fa1e34569834916f18fecaa635152John McCall return llvm::ConstantInt::get(SizeTy, size.getQuantity()); 212bc8d40d85f3fa1e34569834916f18fecaa635152John McCall} 213bc8d40d85f3fa1e34569834916f18fecaa635152John McCall 2141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 2150ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson const NamedDecl *D) const { 21604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 217df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 2187e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 2196ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 2207e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 2216ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 222af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility for definitions. 223af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 224c7c9058f4977ef4584d68718e23f34504b150ef4Fariborz Jahanian if (LV.visibilityExplicit() || !GV->hasAvailableExternallyLinkage()) 225c7c9058f4977ef4584d68718e23f34504b150ef4Fariborz Jahanian GV->setVisibility(GetLLVMVisibility(LV.visibility())); 2267cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 2277cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 228cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// Set the symbol visibility of type information (vtable and RTTI) 229cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// associated with the given type. 230cbfe50224b19119e759802bd0c1463269dffd09eJohn McCallvoid CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV, 231cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall const CXXRecordDecl *RD, 232fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson TypeVisibilityKind TVK) const { 2330ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(GV, RD); 234cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 235279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakVTables) 236279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall return; 237279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall 2389a86a137b0872bad25161fb3408a71d919638757Anders Carlsson // We never want to drop the visibility for RTTI names. 2399a86a137b0872bad25161fb3408a71d919638757Anders Carlsson if (TVK == TVK_ForRTTIName) 2409a86a137b0872bad25161fb3408a71d919638757Anders Carlsson return; 2419a86a137b0872bad25161fb3408a71d919638757Anders Carlsson 242cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We want to drop the visibility to hidden for weak type symbols. 243cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // This isn't possible if there might be unresolved references 244cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // elsewhere that rely on this symbol being visible. 245cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2467a536907da776bdc47a704e7cafd641e8150e653John McCall // This should be kept roughly in sync with setThunkVisibility 2477a536907da776bdc47a704e7cafd641e8150e653John McCall // in CGVTables.cpp. 2487a536907da776bdc47a704e7cafd641e8150e653John McCall 249cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Preconditions. 250f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson if (GV->getLinkage() != llvm::GlobalVariable::LinkOnceODRLinkage || 251cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->getVisibility() != llvm::GlobalVariable::DefaultVisibility) 252cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 253cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 254cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Don't override an explicit visibility attribute. 2554421d2b341d041df44013769f23c306308bbab83Douglas Gregor if (RD->getExplicitVisibility()) 256cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 257cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 258cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall switch (RD->getTemplateSpecializationKind()) { 259cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We have to disable the optimization if this is an EI definition 260cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // because there might be EI declarations in other shared objects. 261cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDefinition: 262cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDeclaration: 263cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 264cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2657a536907da776bdc47a704e7cafd641e8150e653John McCall // Every use of a non-template class's type information has to emit it. 266cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_Undeclared: 267cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 268cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2697a536907da776bdc47a704e7cafd641e8150e653John McCall // In theory, implicit instantiations can ignore the possibility of 2707a536907da776bdc47a704e7cafd641e8150e653John McCall // an explicit instantiation declaration because there necessarily 2717a536907da776bdc47a704e7cafd641e8150e653John McCall // must be an EI definition somewhere with default visibility. In 2727a536907da776bdc47a704e7cafd641e8150e653John McCall // practice, it's possible to have an explicit instantiation for 2737a536907da776bdc47a704e7cafd641e8150e653John McCall // an arbitrary template class, and linkers aren't necessarily able 2747a536907da776bdc47a704e7cafd641e8150e653John McCall // to deal with mixed-visibility symbols. 2757a536907da776bdc47a704e7cafd641e8150e653John McCall case TSK_ExplicitSpecialization: 276cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ImplicitInstantiation: 277279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakTemplateVTables) 2787a536907da776bdc47a704e7cafd641e8150e653John McCall return; 279cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 280cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall } 281cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 282cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // If there's a key function, there may be translation units 283cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // that don't have the key function's definition. But ignore 284cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // this if we're emitting RTTI under -fno-rtti. 285fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson if (!(TVK != TVK_ForRTTI) || Features.RTTI) { 286cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (Context.getKeyFunction(RD)) 287cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 288fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson } 289cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 290cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Otherwise, drop the visibility to hidden. 291cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 292b1c65ff108de47a89585ad37874bd6cb232664cdRafael Espindola GV->setUnnamedAddr(true); 293cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall} 294cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2955f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerStringRef CodeGenModule::getMangledName(GlobalDecl GD) { 296793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 297793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 2985f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; 299793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (!Str.empty()) 300793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 301793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 3024c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall if (!getCXXABI().getMangleContext().shouldMangleDeclName(ND)) { 303793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson IdentifierInfo *II = ND->getIdentifier(); 304793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson assert(II && "Attempt to mangle unnamed decl."); 305793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 306793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = II->getName(); 307793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 308793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson } 309793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 310793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::SmallString<256> Buffer; 311c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola llvm::raw_svector_ostream Out(Buffer); 312793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 313c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Out); 314793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 315c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Out); 316793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const BlockDecl *BD = dyn_cast<BlockDecl>(ND)) 317c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleBlock(BD, Out); 318793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else 319c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleName(ND, Out); 320793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 321793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson // Allocate space for the mangled name. 322c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola Out.flush(); 323793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson size_t Length = Buffer.size(); 324793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson char *Name = MangledNamesAllocator.Allocate<char>(Length); 325793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson std::copy(Buffer.begin(), Buffer.end(), Name); 326793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 3275f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Str = StringRef(Name, Length); 328793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 329793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 330793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson} 331793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 33214110477887e3dc168ffc6c191e72d705051f99ePeter Collingbournevoid CodeGenModule::getBlockMangledName(GlobalDecl GD, MangleBuffer &Buffer, 33314110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const BlockDecl *BD) { 33414110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleContext &MangleCtx = getCXXABI().getMangleContext(); 33514110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const Decl *D = GD.getDecl(); 336c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola llvm::raw_svector_ostream Out(Buffer.getBuffer()); 33714110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne if (D == 0) 338c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleGlobalBlock(BD, Out); 33914110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 340c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleCtorBlock(CD, GD.getCtorType(), BD, Out); 34114110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 342c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleDtorBlock(DD, GD.getDtorType(), BD, Out); 34314110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else 344c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleBlock(cast<DeclContext>(D), BD, Out); 3459a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson} 3469a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson 3475f9e272e632e951b1efe824cd16acb4d96077930Chris Lattnerllvm::GlobalValue *CodeGenModule::GetGlobalValue(StringRef Name) { 348f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return getModule().getNamedValue(Name); 3495f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 3505f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 3516d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 3526d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 3536bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 35449988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3556bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 3566d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3576d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 3586bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 3596bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 3606bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 36149988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3626bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 3636bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 3646bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3656bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 3666bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 3670774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall llvm::FunctionType* CtorFTy = llvm::FunctionType::get(VoidTy, false); 36896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 3696bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3706bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 371c5cbb909e8a27deb8f1a2b6b7bf56a96051af81aChris Lattner llvm::StructType *CtorStructTy = 3727650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType::get(llvm::Type::getInt32Ty(VMContext), 37396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 3746bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3756bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 3766bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 3776bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 3786bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 3791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 3800032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 3813c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 38208e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 3836bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 3846bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3856bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 38696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 3871c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 388572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 3897db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 3901c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 3916d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 3926d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3936d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 394d46f98573ba104eda102dd3224b2dca69f1c6336John McCallllvm::GlobalValue::LinkageTypes 395d46f98573ba104eda102dd3224b2dca69f1c6336John McCallCodeGenModule::getFunctionLinkage(const FunctionDecl *D) { 39690e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); 3977c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 398f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_Internal) 399d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::InternalLinkage; 400f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 401f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<DLLExportAttr>()) 402d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::DLLExportLinkage; 403f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 404f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<WeakAttr>()) 405d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::WeakAnyLinkage; 406f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 407f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 408f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition somewhere else, so we can use available_externally linkage. 409f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_C99Inline) 410fd0f89d3d7e4220327abdec1cb115474d70219dcFariborz Jahanian return llvm::Function::AvailableExternallyLinkage; 4115584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall 4125584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall // Note that Apple's kernel linker doesn't support symbol 4135584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall // coalescing, so we need to avoid linkonce and weak linkages there. 4145584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall // Normally, this means we just map to internal, but for explicit 4155584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall // instantiations we'll map to external. 4165584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall 417f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C++, the compiler has to emit a definition in every translation unit 418f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // that references the function. We should use linkonce_odr because 419f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // a) if all references in this translation unit are optimized away, we 420f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 421f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 422f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition is dependable. 423f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 424142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext 425142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian ? llvm::Function::LinkOnceODRLinkage 426142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian : llvm::Function::InternalLinkage; 427f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 428f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // An explicit instantiation of a template has weak linkage, since 429f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // explicit instantiations can occur in multiple translation units 430f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // and must all be equivalent. However, we are not allowed to 431f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // throw away these explicit instantiations. 432f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_ExplicitTemplateInstantiation) 433142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext 434142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian ? llvm::Function::WeakODRLinkage 4355584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall : llvm::Function::ExternalLinkage; 436f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 437f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // Otherwise, we have strong external linkage. 438f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner assert(Linkage == GVA_StrongExternal); 439f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner return llvm::Function::ExternalLinkage; 440d46f98573ba104eda102dd3224b2dca69f1c6336John McCall} 441d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 442d46f98573ba104eda102dd3224b2dca69f1c6336John McCall 443d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// SetFunctionDefinitionAttributes - Set attributes for a global. 444d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// 445d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// FIXME: This is currently only done for aliases and functions, but not for 446d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// variables (these details are set in EmitGlobalVarDefinition for variables). 447d46f98573ba104eda102dd3224b2dca69f1c6336John McCallvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 448d46f98573ba104eda102dd3224b2dca69f1c6336John McCall llvm::GlobalValue *GV) { 4497c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 450d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 451d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 4527dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 4531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 4547dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 455ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 456761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 457ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 458761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 459ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 460ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 461f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 462f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4637c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 4647c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 465abca5a1b3e74e644e297c7590b46ab73a6bb476aRafael Espindola if (CodeGenOpts.UnwindTables) 466abca5a1b3e74e644e297c7590b46ab73a6bb476aRafael Espindola F->setHasUWTable(); 467abca5a1b3e74e644e297c7590b46ab73a6bb476aRafael Espindola 46874ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 4691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 470af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 4712873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman if (D->hasAttr<NakedAttr>()) { 4722873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman // Naked implies noinline: we should not be inlining such functions. 473dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar F->addFnAttr(llvm::Attribute::Naked); 4742873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman F->addFnAttr(llvm::Attribute::NoInline); 4752873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman } 476dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar 4771feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 47881ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 479f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 4802873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman // (noinline wins over always_inline, and we can't specify both in IR) 4812873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman if (D->hasAttr<AlwaysInlineAttr>() && 4822873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman !F->hasFnAttr(llvm::Attribute::NoInline)) 4832873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman F->addFnAttr(llvm::Attribute::AlwaysInline); 4842873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman 485c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) 486c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola F->setUnnamedAddr(true); 487c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola 488e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor if (Features.getStackProtector() == LangOptions::SSPOn) 489fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 490e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor else if (Features.getStackProtector() == LangOptions::SSPReq) 491fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 492fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 493cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); 494cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt if (alignment) 495cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt F->setAlignment(alignment); 496cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt 497fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 498bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 499bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 500f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 501f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 5021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 5037c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 504934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) 505934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson setGlobalVisibility(GV, ND); 5061fb0caaa7bef765b85972274e3b434af2572c141John McCall else 5071fb0caaa7bef765b85972274e3b434af2572c141John McCall GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 5087c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 50940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 5107c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 5117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 51240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 5137c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 51482d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 51582d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); 5167c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 5177c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5180e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 5190e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 5200e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 5210e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 5220e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 5237c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5247c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 5257c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5260e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 527f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 528f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 529b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlssonvoid CodeGenModule::SetFunctionAttributes(GlobalDecl GD, 530c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 531c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 5320ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne if (unsigned IID = F->getIntrinsicID()) { 5330ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne // If this is an intrinsic function, set the function's attributes 5340ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne // to the intrinsic's attributes. 5350ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne F->setAttributes(llvm::Intrinsic::getAttributes((llvm::Intrinsic::ID)IID)); 5360ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne return; 5370ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne } 5380ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne 539b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); 540b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson 541c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 542b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); 5431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5447c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 5457c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 5461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 54740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 5487c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 5491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 5500a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor FD->isWeakImported()) { 5517c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 5521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 5537c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 5547c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 5551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 556af14603ca61757cf4361b583b45639a04c57e651John McCall 557af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = FD->getLinkageAndVisibility(); 558af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() == ExternalLinkage && LV.visibilityExplicit()) { 559af14603ca61757cf4361b583b45639a04c57e651John McCall F->setVisibility(GetLLVMVisibility(LV.visibility())); 560af14603ca61757cf4361b583b45639a04c57e651John McCall } 5617c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 5627c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 56340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 5647c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 565219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 566219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 5670269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 5681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 5690269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 57035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 5710269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5720269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5730269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 5740269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 575ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 5760269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 5770269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5782acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 5791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 58035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 58135f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 58235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 58335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 5841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 5851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 586a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 58735f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 5881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 589c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 590c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 59196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 5921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 5941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 5950269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 5967db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 5971c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 5980269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5990269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 6000269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 6010269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 6020269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 60367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 60467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 605dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky // for a static function, iterate until no changes are made. 606bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 607046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson while (!DeferredDeclsToEmit.empty() || !DeferredVTables.empty()) { 608046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson if (!DeferredVTables.empty()) { 609046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson const CXXRecordDecl *RD = DeferredVTables.back(); 610046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson DeferredVTables.pop_back(); 611046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson getVTables().GenerateClassData(getVTableLinkage(RD), RD); 612bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola continue; 613bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola } 614bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 6152a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 61667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 61767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 618c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // Check to see if we've already emitted this. This is necessary 619c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // for a couple of reasons: first, decls can end up in the 620c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // deferred-decls queue multiple times, and second, decls can end 621c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // up with definitions in unusual ways (e.g. by an extern inline 622c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // function acquiring a strong function redefinition). Just 623c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // ignore these cases. 624c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // 625c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // TODO: That said, looking this up multiple times is very wasteful. 6265f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Name = getMangledName(D); 627f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *CGRef = GetGlobalValue(Name); 62867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 6291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 63067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 63167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 6321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 633c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // GlobalAlias::isDeclaration() defers to the aliasee, but for our 634c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // purposes an alias counts as a definition. 635c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall if (isa<llvm::GlobalAlias>(CGRef)) 636c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall continue; 637c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall 63867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 63967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 64067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 6415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 64377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougevoid CodeGenModule::EmitGlobalAnnotations() { 64477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (Annotations.empty()) 64577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return; 64677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 64777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge // Create a new global variable for the ConstantStruct in the Module. 64877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::Constant *Array = llvm::ConstantArray::get(llvm::ArrayType::get( 64977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge Annotations[0]->getType(), Annotations.size()), Annotations); 65077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::GlobalValue *gv = new llvm::GlobalVariable(getModule(), 65177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge Array->getType(), false, llvm::GlobalValue::AppendingLinkage, Array, 65277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge "llvm.global.annotations"); 65377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge gv->setSection(AnnotationSection); 65477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 65577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 65677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougellvm::Constant *CodeGenModule::EmitAnnotationString(llvm::StringRef Str) { 65777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::StringMap<llvm::Constant*>::iterator i = AnnotationStrings.find(Str); 65877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (i != AnnotationStrings.end()) 65977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return i->second; 66077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 66177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge // Not found yet, create a new global. 66277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::Constant *s = llvm::ConstantArray::get(getLLVMContext(), Str, true); 66377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::GlobalValue *gv = new llvm::GlobalVariable(getModule(), s->getType(), 66477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge true, llvm::GlobalValue::PrivateLinkage, s, ".str"); 66577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge gv->setSection(AnnotationSection); 66677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge gv->setUnnamedAddr(true); 66777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge AnnotationStrings[Str] = gv; 66877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return gv; 66977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 67077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 67177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougellvm::Constant *CodeGenModule::EmitAnnotationUnit(SourceLocation Loc) { 67277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge SourceManager &SM = getContext().getSourceManager(); 67377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge PresumedLoc PLoc = SM.getPresumedLoc(Loc); 67477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (PLoc.isValid()) 67577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return EmitAnnotationString(PLoc.getFilename()); 67677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return EmitAnnotationString(SM.getBufferName(Loc)); 67777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 67877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 67977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougellvm::Constant *CodeGenModule::EmitAnnotationLineNo(SourceLocation L) { 68077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge SourceManager &SM = getContext().getSourceManager(); 68177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge PresumedLoc PLoc = SM.getPresumedLoc(L); 68277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge unsigned LineNo = PLoc.isValid() ? PLoc.getLine() : 68377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge SM.getExpansionLineNumber(L); 68477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return llvm::ConstantInt::get(Int32Ty, LineNo); 68577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 68677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 6871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 6888bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 68977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge SourceLocation L) { 69077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge // Get the globals for file name, annotation, and the line number. 69177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::Constant *AnnoGV = EmitAnnotationString(AA->getAnnotation()), 69277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge *UnitGV = EmitAnnotationUnit(L), 69377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge *LineNoCst = EmitAnnotationLineNo(L); 6948bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 69557d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 6968bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 69777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::ConstantExpr::getBitCast(GV, Int8PtrTy), 69877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::ConstantExpr::getBitCast(AnnoGV, Int8PtrTy), 69977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::ConstantExpr::getBitCast(UnitGV, Int8PtrTy), 70077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge LineNoCst 7018bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 702c5cbb909e8a27deb8f1a2b6b7bf56a96051af81aChris Lattner return llvm::ConstantStruct::getAnon(Fields); 7038bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 7048bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 70577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougevoid CodeGenModule::AddGlobalAnnotations(const ValueDecl *D, 70677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::GlobalValue *GV) { 70777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge assert(D->hasAttr<AnnotateAttr>() && "no annotate attribute"); 70877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge // Get the struct elements for these annotations. 70977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge for (specific_attr_iterator<AnnotateAttr> 71077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge ai = D->specific_attr_begin<AnnotateAttr>(), 71177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge ae = D->specific_attr_end<AnnotateAttr>(); ai != ae; ++ai) 71277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge Annotations.push_back(EmitAnnotateAttr(GV, *ai, D->getLocation())); 71377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 71477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 715a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidisbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 71690e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis // Never defer when EmitAllDecls is specified. 71790e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis if (Features.EmitAllDecls) 718a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidis return false; 7190b6bc8bd7a1d2a7d7478d13d78cff94cacad61fcDouglas Gregor 7204ac7c0bb39696e92fd220118fedc484c09a69870Argyrios Kyrtzidis return !getContext().DeclMustBeEmitted(Global); 72173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 72273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 7236a836706c40a31c716952b74785102c90fd6afa7Rafael Espindolallvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { 7246a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const AliasAttr *AA = VD->getAttr<AliasAttr>(); 7256a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola assert(AA && "No alias?"); 7266a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7272acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); 7286a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7296a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // See if there is already something with the target's name in the module. 730f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); 7316a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7326a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::Constant *Aliasee; 7336a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (isa<llvm::FunctionType>(DeclTy)) 7341faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 7351faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 7366a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola else 737f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 7386a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::PointerType::getUnqual(DeclTy), 0); 7396a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (!Entry) { 7406a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); 7416a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola F->setLinkage(llvm::Function::ExternalWeakLinkage); 7426a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.insert(F); 7436a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 7446a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7456a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return Aliasee; 7466a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola} 7476a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 748b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 7494a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 7501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7516a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // Weak references don't produce any output by themselves. 7526a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (Global->hasAttr<WeakRefAttr>()) 7536a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return; 7546a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 755bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 756bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 75740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 758f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return EmitAliasDefinition(GD); 759219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 76067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 7615e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 76273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 763dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky if (!FD->doesThisDeclarationHaveABody()) { 764dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky if (!FD->doesDeclarationForceExternallyVisibleDefinition()) 765dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky return; 766dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky 767dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky const FunctionDecl *InlineDefinition = 0; 768dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky FD->getBody(InlineDefinition); 769dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky 7705f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(GD); 771dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky llvm::StringMap<GlobalDecl>::iterator DDI = 772dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky DeferredDecls.find(MangledName); 773dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky if (DDI != DeferredDecls.end()) 774dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky DeferredDecls.erase(DDI); 775dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky EmitGlobalDefinition(InlineDefinition); 77673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 777dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky } 7780269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 7790269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 780bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 781bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 782a9a55c063e9e59c6ab0a6d7a21302660f7bde9f9Douglas Gregor if (VD->isThisDeclarationADefinition() != VarDecl::Definition) 78373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7844c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 7854c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 78667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 78767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 7884357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (!MayDeferGeneration(Global)) { 7894357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Emit the definition if it can't be deferred. 7904357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner EmitGlobalDefinition(GD); 791bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 792bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 793bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall 794bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // If we're deferring emission of a C++ variable with an 795bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer, remember the order in which it appeared in the file. 796bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus && isa<VarDecl>(Global) && 797bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall cast<VarDecl>(Global)->hasInit()) { 798bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); 799bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall CXXGlobalInits.push_back(0); 800bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } 8014357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 8024357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // If the value has already been used, add it directly to the 8034357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit list. 8045f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(GD); 8054357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (GetGlobalValue(MangledName)) 8064357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDeclsToEmit.push_back(GD); 8074357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner else { 8084357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 8094357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // first use of the mangled name will cause it to move into 8104357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit. 8114357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDecls[MangledName] = GD; 8124357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner } 8134c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 8144c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 815b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 8164a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 8171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 818cb421fa690da545b58a720abe5f1c49b166dbde7Dan Gohman PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), 8198e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 8208e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 8218e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 82244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 82344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // At -O0, don't generate IR for functions with available_externally 82444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // linkage. 8257feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor if (CodeGenOpts.OptimizationLevel == 0 && 8267feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor !Function->hasAttr<AlwaysInlineAttr>() && 82744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getFunctionLinkage(Function) 82844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor == llvm::Function::AvailableExternallyLinkage) 82944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return; 83044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor 83144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { 8327dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman // Make sure to emit the definition(s) before we emit the thunks. 8337dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman // This is necessary for the generation of certain thunks. 8347dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) 8357dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitCXXConstructor(CD, GD.getCtorType()); 8367dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman else if (const CXXDestructorDecl *DD =dyn_cast<CXXDestructorDecl>(Method)) 8377dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitCXXDestructor(DD, GD.getDtorType()); 8387dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman else 8397dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitGlobalFunctionDefinition(GD); 8407dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman 84144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (Method->isVirtual()) 84244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getVTables().EmitThunks(GD); 8437270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson 8447dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman return; 84544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 846b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 847b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalFunctionDefinition(GD); 84844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 849b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 850b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 851b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalVarDefinition(VD); 8524357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 853b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Invalid argument to EmitGlobalDefinition()"); 854bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 855bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 85674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 85774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 85874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 85974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 86074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 86174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 86274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 863f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 8645f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerCodeGenModule::GetOrCreateLLVMFunction(StringRef MangledName, 8652acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty, 866f85e193739c953358c865005855253af4f68a497John McCall GlobalDecl D, bool ForVTable, 867f85e193739c953358c865005855253af4f68a497John McCall llvm::Attributes ExtraAttrs) { 8680558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 869f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 8700558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 8716a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 8726a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); 8736a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (FD && !FD->hasAttr<WeakAttr>()) 8747270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 8756a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8766a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 8776a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 8786a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8790558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 8800558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 8811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8820558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 8839cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return llvm::ConstantExpr::getBitCast(Entry, Ty->getPointerTo()); 8840558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 8851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 886654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 887654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 888654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 889654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 890784f21121a6c9418ebd86baa6814e36e1176c410John McCall 8912acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *FTy; 892784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (isa<llvm::FunctionType>(Ty)) { 893784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = cast<llvm::FunctionType>(Ty); 894784f21121a6c9418ebd86baa6814e36e1176c410John McCall } else { 8950774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall FTy = llvm::FunctionType::get(VoidTy, false); 896654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 897654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 898bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 899784f21121a6c9418ebd86baa6814e36e1176c410John McCall llvm::Function *F = llvm::Function::Create(FTy, 900654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 901f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall MangledName, &getModule()); 902f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(F->getName() == MangledName && "name was uniqued!"); 903654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 904b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetFunctionAttributes(D, F, IsIncompleteFunction); 905f85e193739c953358c865005855253af4f68a497John McCall if (ExtraAttrs != llvm::Attribute::None) 906f85e193739c953358c865005855253af4f68a497John McCall F->addFnAttr(ExtraAttrs); 907654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 90867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 90967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 91067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 911f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 91267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 91367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 91467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 91567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 91667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 917bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall 918bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Otherwise, there are cases we have to worry about where we're 919bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // using a declaration for which we must emit a definition but where 920bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // we might not find a top-level definition: 921bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - member functions defined inline in their classes 922bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - friend functions defined inline in some class 923bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - special member functions with implicit definitions 924bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // If we ever change our AST traversal to walk into class methods, 925bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // this will be unnecessary. 9261faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // 9271faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // We also don't emit a definition for a function if it's going to be an entry 9281faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // in a vtable, unless it's already marked as used. 92901de7a44cea9f77cbcda65faad8edc8b48a3b617Rafael Espindola } else if (getLangOptions().CPlusPlus && D.getDecl()) { 930bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Look for a declaration that's lexically in a record. 931bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall const FunctionDecl *FD = cast<FunctionDecl>(D.getDecl()); 932bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall do { 933bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { 9341faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson if (FD->isImplicit() && !ForVTable) { 935bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall assert(FD->isUsed() && "Sema didn't mark implicit function as used!"); 936a29bf41b8f49578207ce36f6b21ff9bb7ee77babDouglas Gregor DeferredDeclsToEmit.push_back(D.getWithDecl(FD)); 937bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 93810620eb5164e31208fcbf0437cd79ae535ed0559Sean Hunt } else if (FD->doesThisDeclarationHaveABody()) { 939a29bf41b8f49578207ce36f6b21ff9bb7ee77babDouglas Gregor DeferredDeclsToEmit.push_back(D.getWithDecl(FD)); 940bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 941bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } 9427b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 943bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall FD = FD->getPreviousDeclaration(); 944bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } while (FD); 94567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 9461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 947784f21121a6c9418ebd86baa6814e36e1176c410John McCall // Make sure the result is of the requested type. 948784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (!IsIncompleteFunction) { 949784f21121a6c9418ebd86baa6814e36e1176c410John McCall assert(F->getType()->getElementType() == Ty); 950784f21121a6c9418ebd86baa6814e36e1176c410John McCall return F; 951784f21121a6c9418ebd86baa6814e36e1176c410John McCall } 952784f21121a6c9418ebd86baa6814e36e1176c410John McCall 9539cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 954784f21121a6c9418ebd86baa6814e36e1176c410John McCall return llvm::ConstantExpr::getBitCast(F, PTy); 9550558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 9560558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 95774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 95874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 95974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 960b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 9612acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty, 9621faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson bool ForVTable) { 96374391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 96474391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 9654a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 966bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 9675f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(GD); 9681faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson return GetOrCreateLLVMFunction(MangledName, Ty, GD, ForVTable); 96974391b48b4791cded373683a3baf67314f358d50Chris Lattner} 97077ba708819285931932ecd33691a672bb59d221aEli Friedman 97174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 97274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 97374391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 9742acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris LattnerCodeGenModule::CreateRuntimeFunction(llvm::FunctionType *FTy, 9755f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Name, 976f85e193739c953358c865005855253af4f68a497John McCall llvm::Attributes ExtraAttrs) { 977f85e193739c953358c865005855253af4f68a497John McCall return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false, 978f85e193739c953358c865005855253af4f68a497John McCall ExtraAttrs); 97974391b48b4791cded373683a3baf67314f358d50Chris Lattner} 980bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 981da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregorstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D, 982da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor bool ConstantInit) { 98388786862424cb2d478516d911709dc19c962af9cJohn McCall if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) 98420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 985da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor 986da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (Context.getLangOptions().CPlusPlus) { 987da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (const RecordType *Record 988da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor = Context.getBaseElementType(D->getType())->getAs<RecordType>()) 9892bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor return ConstantInit && 9902bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor cast<CXXRecordDecl>(Record->getDecl())->isPOD() && 9912bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor !cast<CXXRecordDecl>(Record->getDecl())->hasMutableFields(); 99220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 993da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor 99420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 99520e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 99620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 99774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 99874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 99974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 100074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 100174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 100274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 100374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 1004f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 10055f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerCodeGenModule::GetOrCreateLLVMGlobal(StringRef MangledName, 10062acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::PointerType *Ty, 1007c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola const VarDecl *D, 1008c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola bool UnnamedAddr) { 10093c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 1010f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 101199b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 10126a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 10136a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (D && !D->hasAttr<WeakAttr>()) 10147270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 10156a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 10166a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 10176a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 10186a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 1019c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola if (UnnamedAddr) 1020c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola Entry->setUnnamedAddr(true); 1021c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola 102274391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 1023570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 10241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 102599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 10263c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 102799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 10281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 102967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 103067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 103167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 1032f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 103367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 103467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 103567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 103667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 103767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 103867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 10391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 10411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 104299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 1043f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 0, MangledName, 0, 104456ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 104549988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 104699b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 104774391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 1048f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 1049f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 1050da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor GV->setConstant(DeclIsConstantGlobal(Context, D, false)); 105149988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 1052110e8e56af30363072c140285961592b0107f789John McCall // Set linkage and visibility in case we never see a definition. 1053af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 1054af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() != ExternalLinkage) { 105515e310a3b970b64a84cb30f0005bc396b4d978cbJohn McCall // Don't set internal linkage on declarations. 1056110e8e56af30363072c140285961592b0107f789John McCall } else { 1057110e8e56af30363072c140285961592b0107f789John McCall if (D->hasAttr<DLLImportAttr>()) 1058110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::DLLImportLinkage); 10590a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor else if (D->hasAttr<WeakAttr>() || D->isWeakImported()) 1060110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 1061110e8e56af30363072c140285961592b0107f789John McCall 1062af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility on a declaration only if it's explicit. 1063af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.visibilityExplicit()) 1064af14603ca61757cf4361b583b45639a04c57e651John McCall GV->setVisibility(GetLLVMVisibility(LV.visibility())); 1065110e8e56af30363072c140285961592b0107f789John McCall } 106656ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 106756ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 106874391b48b4791cded373683a3baf67314f358d50Chris Lattner } 10691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1070f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GV; 107174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 1072eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 1073eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 10743bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlssonllvm::GlobalVariable * 10755f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerCodeGenModule::CreateOrReplaceCXXRuntimeVariable(StringRef Name, 10762acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty, 10773bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalValue::LinkageTypes Linkage) { 10783bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name); 10793bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *OldGV = 0; 10803bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10813bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10823bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV) { 10833bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Check if the variable has the right type. 10843bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV->getType()->getElementType() == Ty) 10853bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 10863bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10873bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Because C++ name mangling, the only way we can end up with an already 10883bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // existing global with the same name is if it has been declared extern "C". 108996eaf2992b5955d1470fc9cce7a96e7e1e3b4ea7Anders Carlsson assert(GV->isDeclaration() && "Declaration has wrong type!"); 10903bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV = GV; 10913bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10923bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10933bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Create a new variable. 10943bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV = new llvm::GlobalVariable(getModule(), Ty, /*isConstant=*/true, 10953bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson Linkage, 0, Name); 10963bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10973bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (OldGV) { 10983bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Replace occurrences of the old variable if needed. 10993bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV->takeName(OldGV); 11003bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 11013bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (!OldGV->use_empty()) { 11023bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::Constant *NewPtrForOldDecl = 11033bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); 11043bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->replaceAllUsesWith(NewPtrForOldDecl); 11053bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 11063bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 11073bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->eraseFromParent(); 11083bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 11093bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 11103bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 11113bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson} 11123bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 111374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 111474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 111574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 111674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 111774391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 11182acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty) { 111974391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 112074391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 112174391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 112274391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 11231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11242acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::PointerType *PTy = 1125207f4d8543529221932af82836016a2ef066c917Peter Collingbourne llvm::PointerType::get(Ty, getContext().getTargetAddressSpace(ASTTy)); 1126f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 11275f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(D); 1128f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMGlobal(MangledName, PTy, D); 112974391b48b4791cded373683a3baf67314f358d50Chris Lattner} 11303f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 113174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 113274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 113374391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 11342acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris LattnerCodeGenModule::CreateRuntimeVariable(llvm::Type *Ty, 11355f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Name) { 11361de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0, 1137c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola true); 1138bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1139bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 114003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 114103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 114203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 11437520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 11447520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 11457520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 11467520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 11475f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(D); 1148f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (!GetGlobalValue(MangledName)) { 1149555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 115003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 11517520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 11527520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 11537520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 11547520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 115503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 115603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 115703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 11586fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregorvoid CodeGenModule::EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired) { 11596fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor if (DefinitionRequired) 11606fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor getVTables().GenerateClassData(getVTableLinkage(Class), Class); 11616fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor} 11626fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor 11634b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregorllvm::GlobalVariable::LinkageTypes 1164046c294a43024874ff35656c6e785b64e72f1f36Anders CarlssonCodeGenModule::getVTableLinkage(const CXXRecordDecl *RD) { 1165cb5d2d0647fdab2e36c85b417e03bf18916ce10cEli Friedman if (RD->getLinkage() != ExternalLinkage) 1166dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::InternalLinkage; 1167dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1168dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (const CXXMethodDecl *KeyFunction 1169dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor = RD->getASTContext().getKeyFunction(RD)) { 1170dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // If this class has a key function, use that to determine the linkage of 1171dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // the vtable. 11724b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor const FunctionDecl *Def = 0; 117306a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (KeyFunction->hasBody(Def)) 11744b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor KeyFunction = cast<CXXMethodDecl>(Def); 1175dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 11764b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor switch (KeyFunction->getTemplateSpecializationKind()) { 11774b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_Undeclared: 11784b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitSpecialization: 11796d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // When compiling with optimizations turned on, we emit all vtables, 11806d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // even if the key function is not defined in the current translation 11816d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // unit. If this is the case, use available_externally linkage. 11826d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson if (!Def && CodeGenOpts.OptimizationLevel) 11836d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson return llvm::GlobalVariable::AvailableExternallyLinkage; 11846d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson 11854b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->isInlined()) 1186142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1187142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1188142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 11894b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11904b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::ExternalLinkage; 11914b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11924b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ImplicitInstantiation: 1193142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1194142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1195142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1196f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 11974b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDefinition: 1198142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1199142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::WeakODRLinkage : 1200142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1201f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 12024b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 12034b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // FIXME: Use available_externally linkage. However, this currently 12044b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // breaks LLVM's build due to undefined symbols. 12054b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1206142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1207142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1208142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 12094b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 1210dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor } 1211dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 121253bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian if (Context.getLangOptions().AppleKext) 121353bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::Function::InternalLinkage; 121453bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian 1215dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor switch (RD->getTemplateSpecializationKind()) { 1216dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_Undeclared: 1217dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitSpecialization: 1218dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ImplicitInstantiation: 1219dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // FIXME: Use available_externally linkage. However, this currently 1220dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // breaks LLVM's build due to undefined symbols. 1221dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1222142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDeclaration: 122353bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 1224142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian 1225142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDefinition: 122653bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 12274b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 12284b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 12294b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // Silence GCC warning. 123053bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 12314b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor} 12324b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 12332acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris LattnerCharUnits CodeGenModule::GetTargetTypeStoreSize(llvm::Type *Ty) const { 123406f486ecd05bd6788da97c39164c1903a084c26dKen Dyck return Context.toCharUnitsFromBits( 123506f486ecd05bd6788da97c39164c1903a084c26dKen Dyck TheTargetData.getTypeStoreSizeInBits(Ty)); 1236687cc4a850b59116efee061018f0d8df50728b82Ken Dyck} 1237687cc4a850b59116efee061018f0d8df50728b82Ken Dyck 1238bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 12398f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 124077ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 12416c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman bool NonConstInit = false; 12421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 124331310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl const Expr *InitExpr = D->getAnyInitializer(); 12443bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson 12453bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson if (!InitExpr) { 1246cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 124703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 124803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 124903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 125003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 125103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 125203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 125303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 125403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 125503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 1256b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 125777ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 1258c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor Init = EmitConstantExpr(InitExpr, D->getType()); 12596e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 12603bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson QualType T = InitExpr->getType(); 1261c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor if (D->getType()->isReferenceType()) 1262c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor T = D->getType(); 1263c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor 126489ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 126589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 12666c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman NonConstInit = true; 126789ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 126889ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 126989ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 127089ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 1271bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } else { 1272bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // We don't need an initializer, so remove the entry for the delayed 1273bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer position (just in case this entry was delayed). 1274bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus) 1275bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition.erase(D); 12766e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 12778f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 12788e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 12792acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type* InitType = Init->getType(); 1280570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 12811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1282570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 1283570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 12849d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 12859d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 12869d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 1287570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 1288570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 12891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1290570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 1291570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 12921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1293570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 1294570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 1295570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 1296570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 1297570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 1298570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 1299570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 1300570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 1301570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 1302570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 1303570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 1304207f4d8543529221932af82836016a2ef066c917Peter Collingbourne GV->getType()->getAddressSpace() != 1305207f4d8543529221932af82836016a2ef066c917Peter Collingbourne getContext().getTargetAddressSpace(ASTTy)) { 13061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1307f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // Move the old entry aside so that we'll create a new one. 13085f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Entry->setName(StringRef()); 1309232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 1310570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 1311570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 13120558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 131377ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 13141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 13153c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 1316570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 131777ba708819285931932ecd33691a672bb59d221aEli Friedman 131877ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 1319570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 132077ba708819285931932ecd33691a672bb59d221aEli Friedman } 132177ba708819285931932ecd33691a672bb59d221aEli Friedman 132277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (D->hasAttr<AnnotateAttr>()) 132377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge AddGlobalAnnotations(D, GV); 13248bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 132588a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 1326e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 1327e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 1328e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 1329da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (!NonConstInit && DeclIsConstantGlobal(Context, D, true)) 1330e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 13311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13328b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); 1333354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 133488a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 1335354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage = 1336354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GetLLVMLinkageVarDefinition(D, GV); 1337354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setLinkage(Linkage); 1338354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian if (Linkage == llvm::GlobalVariable::CommonLinkage) 1339354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // common vars aren't constant even if declared const. 1340354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setConstant(false); 1341354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1342354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian SetCommonAttributes(D, GV); 1343354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 13443030eb82593097502469a8b3fc26112c79c75605John McCall // Emit the initializer function if necessary. 13453030eb82593097502469a8b3fc26112c79c75605John McCall if (NonConstInit) 13463030eb82593097502469a8b3fc26112c79c75605John McCall EmitCXXGlobalVarDeclInitFunc(D, GV); 13473030eb82593097502469a8b3fc26112c79c75605John McCall 1348354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // Emit global variable debug information. 1349aa11289f754d220c9c155b68a4f84cdcfcefef6aDevang Patel if (CGDebugInfo *DI = getModuleDebugInfo()) { 1350354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->setLocation(D->getLocation()); 1351354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->EmitGlobalVariable(GV, D); 1352354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian } 1353354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian} 1354354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1355354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanianllvm::GlobalValue::LinkageTypes 1356354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz JahanianCodeGenModule::GetLLVMLinkageVarDefinition(const VarDecl *D, 1357354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalVariable *GV) { 135890e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); 1359a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 1360354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::InternalLinkage; 136140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1362354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLImportLinkage; 136340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1364354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLExportLinkage; 1365e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1366e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1367354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 1368e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1369354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 13708f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor } else if (Linkage == GVA_TemplateInstantiation || 13718f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor Linkage == GVA_ExplicitTemplateInstantiation) 137299ace16bc6962f1fc3dc45bbbdf2eb74e555a8adJohn McCall return llvm::GlobalVariable::WeakODRLinkage; 1373a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher else if (!getLangOptions().CPlusPlus && 1374a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher ((!CodeGenOpts.NoCommon && !D->getAttr<NoCommonAttr>()) || 1375a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher D->getAttr<CommonAttr>()) && 1376309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 1377ab27d6ea7b4ce2762a16905281de796db32bb6f2Fariborz Jahanian !D->getAttr<SectionAttr>() && !D->isThreadSpecified() && 1378ab27d6ea7b4ce2762a16905281de796db32bb6f2Fariborz Jahanian !D->getAttr<WeakImportAttr>()) { 137991f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher // Thread local vars aren't considered common linkage. 1380354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::CommonLinkage; 1381686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 1382354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::ExternalLinkage; 138388a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 13845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1385bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1386bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1387bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1388bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1389bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1390bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1391bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1392bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1393bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1394bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1395bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1396bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1397bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1398bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 13991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14002acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *NewRetTy = NewFn->getReturnType(); 14015f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Value*, 4> ArgList; 1402bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1403bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1404dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer UI != E; ) { 1405bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 1406dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::Value::use_iterator I = UI++; // Increment before the CI is erased. 1407dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*I); 14088670cd3ea4dfbf86caacd270ec2441e9949bbb6aGabor Greif if (!CI) continue; // FIXME: when we allow Invoke, just do CallSite CS(*I) 140935db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif llvm::CallSite CS(CI); 1410dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer if (!CI || !CS.isCallee(I)) continue; 14111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1412bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1413bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1414bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1415bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1416bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 141740f9c302f23a35611cd354f40b22b37f2c554a40John McCall // Get the attribute list. 141840f9c302f23a35611cd354f40b22b37f2c554a40John McCall llvm::SmallVector<llvm::AttributeWithIndex, 8> AttrVec; 141940f9c302f23a35611cd354f40b22b37f2c554a40John McCall llvm::AttrListPtr AttrList = CI->getAttributes(); 142040f9c302f23a35611cd354f40b22b37f2c554a40John McCall 142140f9c302f23a35611cd354f40b22b37f2c554a40John McCall // Get any return attributes. 142240f9c302f23a35611cd354f40b22b37f2c554a40John McCall llvm::Attributes RAttrs = AttrList.getRetAttributes(); 142340f9c302f23a35611cd354f40b22b37f2c554a40John McCall 142440f9c302f23a35611cd354f40b22b37f2c554a40John McCall // Add the return attributes. 142540f9c302f23a35611cd354f40b22b37f2c554a40John McCall if (RAttrs) 142640f9c302f23a35611cd354f40b22b37f2c554a40John McCall AttrVec.push_back(llvm::AttributeWithIndex::get(0, RAttrs)); 142740f9c302f23a35611cd354f40b22b37f2c554a40John McCall 1428bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1429bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1430bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1431bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1432bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1433bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1434bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 143535db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif if (CS.arg_size() == ArgNo || 143635db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif CS.getArgument(ArgNo)->getType() != AI->getType()) { 1437bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1438bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1439bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 144040f9c302f23a35611cd354f40b22b37f2c554a40John McCall 144140f9c302f23a35611cd354f40b22b37f2c554a40John McCall // Add any parameter attributes. 144240f9c302f23a35611cd354f40b22b37f2c554a40John McCall if (llvm::Attributes PAttrs = AttrList.getParamAttributes(ArgNo + 1)) 144340f9c302f23a35611cd354f40b22b37f2c554a40John McCall AttrVec.push_back(llvm::AttributeWithIndex::get(ArgNo + 1, PAttrs)); 1444bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1445bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1446bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 14471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 144840f9c302f23a35611cd354f40b22b37f2c554a40John McCall if (llvm::Attributes FnAttrs = AttrList.getFnAttributes()) 144940f9c302f23a35611cd354f40b22b37f2c554a40John McCall AttrVec.push_back(llvm::AttributeWithIndex::get(~0, FnAttrs)); 145040f9c302f23a35611cd354f40b22b37f2c554a40John McCall 1451bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1452bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 14536ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif ArgList.append(CS.arg_begin(), CS.arg_begin() + ArgNo); 14544c7d9f1507d0f102bd4133bba63348636facd469Jay Foad llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList, "", CI); 1455bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1456ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1457bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 145840f9c302f23a35611cd354f40b22b37f2c554a40John McCall NewCall->setAttributes(llvm::AttrListPtr::get(AttrVec.begin(), 145940f9c302f23a35611cd354f40b22b37f2c554a40John McCall AttrVec.end())); 1460ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1461bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1462bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 146300549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 146400549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 14653b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1466c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner // Copy debug location attached to CI. 1467c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner if (!CI->getDebugLoc().isUnknown()) 1468c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner NewCall->setDebugLoc(CI->getDebugLoc()); 1469bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1470bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1471bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1472bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1473bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1474b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 1475b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 1476d26bc76c98006609002d9930f8840490e88ac5b5John McCall 14771f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall // Compute the function info and LLVM type. 1478d26bc76c98006609002d9930f8840490e88ac5b5John McCall const CGFunctionInfo &FI = getTypes().getFunctionInfo(GD); 14791f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall bool variadic = false; 14801f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall if (const FunctionProtoType *fpt = D->getType()->getAs<FunctionProtoType>()) 14811f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall variadic = fpt->isVariadic(); 14822acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *Ty = getTypes().GetFunctionType(FI, variadic); 1483d26bc76c98006609002d9930f8840490e88ac5b5John McCall 14849fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1485b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 14861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14870558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 14880558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 14890558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 14900558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 14910558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 14921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14940558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1495bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 14961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 149742745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1498bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 14990558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 150034809507232bc4c3c4840c7d092c7440219fddafChris Lattner 150162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 150262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 150362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 150462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 150562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 150662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 1507f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // (e.g. "int f(int x)"). Move the old function aside so that it 1508f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // doesn't interfere with GetAddrOfFunction. 15095f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner OldFn->setName(StringRef()); 1510b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 15111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1512bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1513bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1514bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 15159fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1516bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 15179fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 15189fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 15191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 152062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1521bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 15221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 15233c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1524bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1525bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 15261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 152762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1528bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 15291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15300558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1531bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 15321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1533112c967bd5c862a0f5d7913aa06700c048807db8John McCall // We need to set linkage and visibility on the function before 1534112c967bd5c862a0f5d7913aa06700c048807db8John McCall // generating code for it because various parts of IR generation 1535112c967bd5c862a0f5d7913aa06700c048807db8John McCall // want to propagate this information down (e.g. to local static 1536112c967bd5c862a0f5d7913aa06700c048807db8John McCall // declarations). 15370558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 15388b2423361648c39a7d8a3c5e8129e12006deac32John McCall setFunctionLinkage(D, Fn); 1539bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1540112c967bd5c862a0f5d7913aa06700c048807db8John McCall // FIXME: this is redundant with part of SetFunctionDefinitionAttributes 15410ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(Fn, D); 1542112c967bd5c862a0f5d7913aa06700c048807db8John McCall 1543d26bc76c98006609002d9930f8840490e88ac5b5John McCall CodeGenFunction(*this).GenerateCode(D, Fn, FI); 15446379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 15457c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 15467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 15471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 154840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1549219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 155040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1551219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 155277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (D->hasAttr<AnnotateAttr>()) 155377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge AddGlobalAnnotations(D, Fn); 1554bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1555bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1556f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallvoid CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { 1557f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 155840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1559bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1560bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 15615f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(GD); 1562f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1563f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // If there is a definition in the module, then it wins over the alias. 1564f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // This is dubious, but allow it to be safe. Just ignore the alias. 1565f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 1566f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (Entry && !Entry->isDeclaration()) 1567f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return; 15681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15692acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1570bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1571bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1572bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1573bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1574bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 15751faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 15761faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 1577bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1578f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 157996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1580bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1581bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 15821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1583bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1584bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1585bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 15861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1587bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1588f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(Entry->isDeclaration()); 1589f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1590bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1591bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1592bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1593bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1594bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1595bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1596bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1597f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GA->takeName(Entry); 15981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15993c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1600bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1601bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1602f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall } else { 16039a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson GA->setName(MangledName); 1604bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 16051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16067c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 16077c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 16087c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 160940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 16107c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 16117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 161206a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (FD->hasBody()) 16137c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 16147c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 16157c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 16167c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 16171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 161811e8ce7380856abee188b237c2600272df2ed09dRafael Espindola D->hasAttr<WeakRefAttr>() || 16190a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor D->isWeakImported()) { 16207c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 16217c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 16227c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 16237c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1624bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1625bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 16268dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID, 16272d3ba4f5a923a90c3fc290ddfba5e36c2d0a9b46Chris Lattner ArrayRef<llvm::Type*> Tys) { 1628df983a8bcbbcea911b8dce283f044787df119d50Jay Foad return llvm::Intrinsic::getDeclaration(&getModule(), (llvm::Intrinsic::ID)IID, 16298dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramer Tys); 16307acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1631bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 16321d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 16331d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 16341d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 163570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 16361d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 16371d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 16385f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef String = Literal->getString(); 16392f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer unsigned NumBytes = String.size(); 16401d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1641f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1642f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1643f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 16442f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer return Map.GetOrCreateValue(String); 1645f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1646f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 16471d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 16485f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<UTF16, 128> ToBuf(NumBytes); 16492f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer const UTF8 *FromPtr = (UTF8 *)String.data(); 16501d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 16511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1652e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian (void)ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 1653e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian &ToPtr, ToPtr + NumBytes, 1654e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian strictConversion); 16551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 165670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 16571d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 165870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 165970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 166070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 166170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 166270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 166370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 166470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 166570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 166670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 166770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 166870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 166970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 167070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 167170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 167270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 167370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 167470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1675434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1676434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1677434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 167870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 16791d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 16805f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner return Map.GetOrCreateValue(StringRef(AsBytes.data(), AsBytes.size())); 16811d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 16821d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1683cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanianstatic llvm::StringMapEntry<llvm::Constant*> & 1684cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz JahanianGetConstantStringEntry(llvm::StringMap<llvm::Constant*> &Map, 1685cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian const StringLiteral *Literal, 1686cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian unsigned &StringLength) 1687cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian{ 16885f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef String = Literal->getString(); 1689cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian StringLength = String.size(); 1690cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian return Map.GetOrCreateValue(String); 1691cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian} 1692cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian 16931d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 16941d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 16951d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 16961d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 16971d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 16981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 169970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 170070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 17011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17021d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 17031d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 17041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17050032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 17060032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 17073e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 17081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17099d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1710c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 17112acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 171296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 17131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 17149d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 17153e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 17163e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 1717a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad llvm::ConstantExpr::getGetElementPtr(GV, Zeros); 1718c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 17191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1720e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 17213e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 17222acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::StructType *STy = 1723e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1724e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 17255add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 172644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1727c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 17285add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 17291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1730c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 17312acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 17321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 17335add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 17345add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1735c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 17360032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1737a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 173895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1739278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner bool isConstant; 1740a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1741278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 174295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1743278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // Note: -fwritable-strings doesn't make unicode CFStrings writable, but 1744278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // does make plain ascii ones writable. 1745278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = true; 1746a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 1747584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // FIXME: With OS X ld 123.2 (xcode 4) and LTO we would get a linker error 1748584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // when using private linkage. It is not clear if this is a bug in ld 1749584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // or a reasonable new restriction. 1750dc0f137295bc7ec5b231ff1842388f149f43c0c8Rafael Espindola Linkage = llvm::GlobalValue::LinkerPrivateLinkage; 1751278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = !Features.WritableStrings; 1752a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1753278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 17541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 1755278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 1756278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner ".str"); 1757b266a1fce09ab4ee7033268199509aacfbef056aRafael Espindola GV->setUnnamedAddr(true); 1758a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 17594da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 17604da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck GV->setAlignment(Align.getQuantity()); 1761f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar } else { 1762f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar CharUnits Align = getContext().getTypeAlignInChars(getContext().CharTy); 1763f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar GV->setAlignment(Align.getQuantity()); 1764a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1765a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros); 17665add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1767c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1768c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 17695add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 17701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1771c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 177208e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 17731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 17741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 177595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 1776bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor if (const char *Sect = getContext().getTargetInfo().getCFStringSection()) 17778e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 17781d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 17791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17800c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1781c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 178245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 178345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregorstatic RecordDecl * 178445c4ea75b235de94f44bf96843624e6a559e4c00Douglas GregorCreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 178545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor DeclContext *DC, IdentifierInfo *Id) { 178645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor SourceLocation Loc; 178745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor if (Ctx.getLangOptions().CPlusPlus) 178845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 178945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor else 179045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 179145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor} 179245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 179333e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanianllvm::Constant * 17944c73307c74764ba99e1379677fe92af72f676531Fariborz JahanianCodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) { 17952bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian unsigned StringLength = 0; 17962bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::StringMapEntry<llvm::Constant*> &Entry = 1797cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian GetConstantStringEntry(CFConstantStringMap, Literal, StringLength); 17982bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17992bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (llvm::Constant *C = Entry.getValue()) 18002bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return C; 18012bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18022bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zero = 18032bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 18042bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zeros[] = { Zero, Zero }; 18052bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 1806ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian // If we don't already have it, get _NSConstantStringClassReference. 18074c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (!ConstantStringClassRef) { 18084c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string StringClass(getLangOptions().ObjCConstantStringClass); 18092acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 18104c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::Constant *GV; 18116f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian if (Features.ObjCNonFragileABI) { 181225dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian std::string str = 181325dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian StringClass.empty() ? "OBJC_CLASS_$_NSConstantString" 181425dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian : "OBJC_CLASS_$_" + StringClass; 18156f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian GV = getObjCRuntime().GetClassGlobal(str); 18166f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian // Make sure the result is of the correct type. 18172acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 18186f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian ConstantStringClassRef = 18196f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian llvm::ConstantExpr::getBitCast(GV, PTy); 18206f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian } else { 182125dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian std::string str = 182225dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian StringClass.empty() ? "_NSConstantStringClassReference" 182325dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian : "_" + StringClass + "ClassReference"; 18242acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *PTy = llvm::ArrayType::get(Ty, 0); 182525dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian GV = CreateRuntimeVariable(PTy, str); 18266f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian // Decay array -> ptr 18276f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian ConstantStringClassRef = 1828a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad llvm::ConstantExpr::getGetElementPtr(GV, Zeros); 18294c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian } 18302bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 183145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 183245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor if (!NSConstantStringType) { 183345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // Construct the type for a constant NSString. 183445c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor RecordDecl *D = CreateRecordDecl(Context, TTK_Struct, 183545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor Context.getTranslationUnitDecl(), 183645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor &Context.Idents.get("__builtin_NSString")); 183745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor D->startDefinition(); 183845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 183945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor QualType FieldTypes[3]; 184045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 184145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // const int *isa; 184245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldTypes[0] = Context.getPointerType(Context.IntTy.withConst()); 184345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // const char *str; 184445c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldTypes[1] = Context.getPointerType(Context.CharTy.withConst()); 184545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // unsigned int length; 184645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldTypes[2] = Context.UnsignedIntTy; 184745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 184845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // Create fields 184945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor for (unsigned i = 0; i < 3; ++i) { 185045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldDecl *Field = FieldDecl::Create(Context, D, 185145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor SourceLocation(), 185245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor SourceLocation(), 0, 185345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldTypes[i], /*TInfo=*/0, 185445c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor /*BitWidth=*/0, 185545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor /*Mutable=*/false, 185645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor /*HasInit=*/false); 185745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor Field->setAccess(AS_public); 185845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor D->addDecl(Field); 185945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor } 186045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 186145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor D->completeDefinition(); 186245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor QualType NSTy = Context.getTagDeclType(D); 186345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor NSConstantStringType = cast<llvm::StructType>(getTypes().ConvertType(NSTy)); 186445c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor } 18652bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18662bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian std::vector<llvm::Constant*> Fields(3); 18672bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18682bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Class pointer. 18694c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Fields[0] = ConstantStringClassRef; 18702bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18712bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String pointer. 18722bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 18732bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18742bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage; 18752bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isConstant; 1876cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian Linkage = llvm::GlobalValue::PrivateLinkage; 1877cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian isConstant = !Features.WritableStrings; 18782bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18792bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable *GV = 18802bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 18812bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian ".str"); 1882803d307a5385059b1a84dfe9706ab158c80a20dcRafael Espindola GV->setUnnamedAddr(true); 1883cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian CharUnits Align = getContext().getTypeAlignInChars(getContext().CharTy); 1884cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian GV->setAlignment(Align.getQuantity()); 1885a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros); 18862bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18872bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String length. 18882acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 18892bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[2] = llvm::ConstantInt::get(Ty, StringLength); 18902bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18912bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // The struct. 189245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor C = llvm::ConstantStruct::get(NSConstantStringType, Fields); 18932bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 18942bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable::PrivateLinkage, C, 18952bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian "_unnamed_nsstring_"); 18962bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME. Fix section. 1897ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian if (const char *Sect = 1898ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian Features.ObjCNonFragileABI 1899bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor ? getContext().getTargetInfo().getNSStringNonFragileABISection() 1900bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor : getContext().getTargetInfo().getNSStringSection()) 19012bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setSection(Sect); 19022bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Entry.setValue(GV); 19032bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19042bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return GV; 190533e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian} 190633e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian 19070815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas GregorQualType CodeGenModule::getObjCFastEnumerationStateType() { 19080815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor if (ObjCFastEnumerationStateType.isNull()) { 19090815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor RecordDecl *D = CreateRecordDecl(Context, TTK_Struct, 19100815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.getTranslationUnitDecl(), 19110815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor &Context.Idents.get("__objcFastEnumerationState")); 19120815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor D->startDefinition(); 19130815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 19140815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor QualType FieldTypes[] = { 19150815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.UnsignedLongTy, 19160815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.getPointerType(Context.getObjCIdType()), 19170815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.getPointerType(Context.UnsignedLongTy), 19180815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.getConstantArrayType(Context.UnsignedLongTy, 19190815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor llvm::APInt(32, 5), ArrayType::Normal, 0) 19200815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor }; 19210815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 19220815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor for (size_t i = 0; i < 4; ++i) { 19230815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor FieldDecl *Field = FieldDecl::Create(Context, 19240815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor D, 19250815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor SourceLocation(), 19260815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor SourceLocation(), 0, 19270815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor FieldTypes[i], /*TInfo=*/0, 19280815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor /*BitWidth=*/0, 19290815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor /*Mutable=*/false, 19300815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor /*HasInit=*/false); 19310815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Field->setAccess(AS_public); 19320815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor D->addDecl(Field); 19330815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor } 19340815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 19350815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor D->completeDefinition(); 19360815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor ObjCFastEnumerationStateType = Context.getTagDeclType(D); 19370815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor } 19380815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 19390815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor return ObjCFastEnumerationStateType; 19400815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor} 19410815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 19426143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 19431e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 19446143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 19453b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck const ASTContext &Context = getContext(); 19461e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 19473b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck Context.getAsConstantArrayType(E->getType()); 19481e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 19491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1950dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 19511e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 19521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19535cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor switch (E->getKind()) { 19545cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case StringLiteral::Ascii: 19555cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case StringLiteral::UTF8: 19565cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor break; 19575cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case StringLiteral::Wide: 1958bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor RealLen *= Context.getTargetInfo().getWCharWidth() / Context.getCharWidth(); 19595cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor break; 19605cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case StringLiteral::UTF16: 1961bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor RealLen *= Context.getTargetInfo().getChar16Width() / Context.getCharWidth(); 19625cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor break; 19635cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case StringLiteral::UTF32: 1964bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor RealLen *= Context.getTargetInfo().getChar32Width() / Context.getCharWidth(); 19655cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor break; 19665cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } 19671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19682f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer std::string Str = E->getString().str(); 19691e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 19701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19711e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 19721e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 19731e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 19746143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 19756143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 19766143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 19776143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 19786143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 19797eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 1980a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall CharUnits Align = getContext().getTypeAlignInChars(S->getType()); 1981a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S), 1982a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall /* GlobalName */ 0, 1983a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall Align.getQuantity()); 19845cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (S->isWide() || S->isUTF16() || S->isUTF32()) { 19857eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Type *DestTy = 19867eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); 19877eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman C = llvm::ConstantExpr::getBitCast(C, DestTy); 19887eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 19897eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman return C; 19906143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 19916143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1992eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1993eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1994eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1995eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1996eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1997eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1998a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1999a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 2000eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 2001eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 2002eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 2003a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 2004a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCallstatic llvm::GlobalVariable *GenerateStringLiteral(StringRef str, 200545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 20065fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 2007a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall const char *GlobalName, 2008a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall unsigned Alignment) { 20096143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 20100032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 20110032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 20121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 201345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 20141257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalVariable *GV = 20151257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 20161257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalValue::PrivateLinkage, 20171257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola C, GlobalName); 2018a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall GV->setAlignment(Alignment); 20191257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola GV->setUnnamedAddr(true); 20201257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola return GV; 202145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 202245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 20236143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 20246143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 20256143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 20266143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 20276143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 20286143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 20296143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 20306143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 20315f9e272e632e951b1efe824cd16acb4d96077930Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfConstantString(StringRef Str, 2032a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall const char *GlobalName, 2033a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall unsigned Alignment) { 20348e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 20358e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 20368e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 20378e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 203895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 20398e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 20408e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 20418e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 2042a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall return GenerateStringLiteral(Str, false, *this, GlobalName, Alignment); 20431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2044a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall llvm::StringMapEntry<llvm::GlobalVariable *> &Entry = 20459de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer ConstantStringMap.GetOrCreateValue(Str); 204645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 2047a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall if (llvm::GlobalVariable *GV = Entry.getValue()) { 2048a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall if (Alignment > GV->getAlignment()) { 2049a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall GV->setAlignment(Alignment); 2050a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall } 2051a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall return GV; 2052a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall } 205345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 205445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 2055a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall llvm::GlobalVariable *GV = GenerateStringLiteral(Str, true, *this, GlobalName, Alignment); 2056a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall Entry.setValue(GV); 2057a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall return GV; 205845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 20596143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 20606143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 20619de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer/// array containing the literal and a terminating '\0' 20626143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 20639de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramerllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &Str, 2064a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall const char *GlobalName, 2065a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall unsigned Alignment) { 20665f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef StrWithNull(Str.c_str(), Str.size() + 1); 2067a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall return GetAddrOfConstantString(StrWithNull, GlobalName, Alignment); 20686143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 206941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 2070af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 2071af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 20721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 2073af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 20741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 207517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 2076af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 20771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2078af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 2079af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 2080af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 2081af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 2082af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 2083af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 2084af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 2085af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 2086af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 208717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 2088fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 2089fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 2090af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 209117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 2092fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 2093fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 2094af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 2095af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 2096af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 2097af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 2098e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCallstatic bool needsDestructMethod(ObjCImplementationDecl *impl) { 2099db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose const ObjCInterfaceDecl *iface = impl->getClassInterface(); 2100db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose for (const ObjCIvarDecl *ivar = iface->all_declared_ivar_begin(); 2101e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ivar; ivar = ivar->getNextIvar()) 2102e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall if (ivar->getType().isDestructedType()) 2103e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall return true; 2104e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 2105e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall return false; 2106e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall} 2107e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 2108109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// EmitObjCIvarInitializations - Emit information for ivar initialization 2109109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// for an implementation. 2110109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanianvoid CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { 2111e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // We might need a .cxx_destruct even if we don't have any ivar initializers. 2112e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall if (needsDestructMethod(D)) { 2113e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); 2114e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 2115e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCMethodDecl *DTORMethod = 2116e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCMethodDecl::Create(getContext(), D->getLocation(), D->getLocation(), 211775cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis cxxSelector, getContext().VoidTy, 0, D, 211875cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isInstance=*/true, /*isVariadic=*/false, 211975cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isSynthesized=*/true, /*isImplicitlyDeclared=*/true, 212075cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isDefined=*/false, ObjCMethodDecl::Required); 2121e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall D->addInstanceMethod(DTORMethod); 2122e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); 2123f85e193739c953358c865005855253af4f68a497John McCall D->setHasCXXStructors(true); 2124e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall } 2125e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 2126e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // If the implementation doesn't have any ivar initializers, we don't need 2127e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // a .cxx_construct. 2128827bbcc8a9115782693b21030a45378abe5c1862David Chisnall if (D->getNumIvarInitializers() == 0) 2129109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian return; 2130109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 2131e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall IdentifierInfo *II = &getContext().Idents.get(".cxx_construct"); 2132e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 2133109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian // The constructor returns 'self'. 2134109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), 2135109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 2136109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 2137109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().getObjCIdType(), 0, 213875cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis D, /*isInstance=*/true, 213975cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isVariadic=*/false, 214075cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isSynthesized=*/true, 214175cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isImplicitlyDeclared=*/true, 214275cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isDefined=*/false, 2143109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 2144109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(CTORMethod); 2145109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); 2146f85e193739c953358c865005855253af4f68a497John McCall D->setHasCXXStructors(true); 2147109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian} 2148109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 214991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 2150984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 215117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 2152984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 2153984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 2154984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 2155984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 215691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 215791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 2158f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 2159f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 216091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 216191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 216291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 216391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 216417945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 216591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 216691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 216791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 216891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 216941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 217041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 217141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 217241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 217341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 217441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 217541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 217641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 217716e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 217816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 217916e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 21801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 218141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 2182293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 21832b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 218441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 218516e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 21868387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() || 21878387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet cast<FunctionDecl>(D)->isLateTemplateParsed()) 218816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 21891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2190555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 2191555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 2192555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 219341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 2194555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 219541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 219641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 219726fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall // Indirect fields from global anonymous structs and unions can be 219826fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall // ignored; only the actual variable requires IR gen support. 219926fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall case Decl::IndirectField: 220026fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall break; 220126fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall 220295d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 220341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 2204984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 220541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 22069cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 22079d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 22089cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 2209dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 2210127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 2211127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 22123e4c6c4c79a03f5cb0c4671d7c282d623c6dc35eRichard Smith case Decl::TypeAliasTemplate: 2213018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 22146a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor case Decl::Block: 22159cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 221695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 22171fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 22188387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() || 22198387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet cast<FunctionDecl>(D)->isLateTemplateParsed()) 22201fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 22211fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 222295d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 222395d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 222427ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 22258387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->isLateTemplateParsed()) 22268387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet return; 222727ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 222827ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 222936674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 223036674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 223136674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 223236674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 223336674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 223495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 22351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 223638e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 223741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 223841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 2239b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 224041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 2241000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 2242baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner case Decl::ObjCCategory: { 2243baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D); 2244baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner if (CD->IsClassExtension() && CD->hasSynthBitfield()) 2245baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner Context.ResetObjCLayout(CD->getClassInterface()); 2246baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner break; 2247baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner } 2248285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 224941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 2250e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 225141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 225241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 225341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 2254af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 2255af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 2256e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 225741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 225841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 2259af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 2260af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 2261000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (Features.ObjCNonFragileABI2 && OMD->hasSynthBitfield()) 2262000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(OMD->getClassInterface()); 2263af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 2264109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian EmitObjCIvarInitializations(OMD); 2265e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime->GenerateClass(OMD); 226641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 22671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 226841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 226941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 227041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 22716fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 227241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 227341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 227441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 22751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 2276305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 227741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 227841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 227991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 228091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 228141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 228241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 228341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 228441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 22855f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef AsmString = AD->getAsmString()->getString(); 22861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 228741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 228841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 228941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 22909f5bff086cad25c15b4deb8a7763786097aadccdChris Lattner else if (*--S.end() == '\n') 22919f5bff086cad25c15b4deb8a7763786097aadccdChris Lattner getModule().setModuleInlineAsm(S + AsmString.str()); 229241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 22938d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 229441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 229541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 22961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 2298f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 2299f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 2300f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 230141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 230241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 230341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 2304744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2305744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Turns the given pointer into a constant. 2306744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, 2307744016dde06fcffd50931e94a98c850f8b12cd87John McCall const void *Ptr) { 2308744016dde06fcffd50931e94a98c850f8b12cd87John McCall uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); 23092acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *i64 = llvm::Type::getInt64Ty(Context); 2310744016dde06fcffd50931e94a98c850f8b12cd87John McCall return llvm::ConstantInt::get(i64, PtrInt); 2311744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2312744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2313744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic void EmitGlobalDeclMetadata(CodeGenModule &CGM, 2314744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *&GlobalMetadata, 2315744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl D, 2316744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr) { 2317744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (!GlobalMetadata) 2318744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata = 2319744016dde06fcffd50931e94a98c850f8b12cd87John McCall CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); 2320744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2321744016dde06fcffd50931e94a98c850f8b12cd87John McCall // TODO: should we report variant information for ctors/dtors? 2322744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Ops[] = { 2323744016dde06fcffd50931e94a98c850f8b12cd87John McCall Addr, 2324744016dde06fcffd50931e94a98c850f8b12cd87John McCall GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) 2325744016dde06fcffd50931e94a98c850f8b12cd87John McCall }; 23266f141659cab11109d9931d92d0988f8850778de3Jay Foad GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops)); 2327744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2328744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2329744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes associating all the global values in the 2330744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// current module with the Decls they came from. This is useful for 2331744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// projects using IR gen as a subroutine. 2332744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// 2333744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Since there's currently no way to associate an MDNode directly 2334744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with an llvm::GlobalValue, we create a global named metadata 2335744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with the name 'clang.global.decl.ptrs'. 2336744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenModule::EmitDeclMetadata() { 2337744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2338744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2339744016dde06fcffd50931e94a98c850f8b12cd87John McCall // StaticLocalDeclMap 23405f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner for (llvm::DenseMap<GlobalDecl,StringRef>::iterator 2341744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = MangledDeclNames.begin(), E = MangledDeclNames.end(); 2342744016dde06fcffd50931e94a98c850f8b12cd87John McCall I != E; ++I) { 2343744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); 2344744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); 2345744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2346744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2347744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2348744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes for all the local variables in the current 2349744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// function. 2350744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenFunction::EmitDeclMetadata() { 2351744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (LocalDeclMap.empty()) return; 2352744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2353744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::LLVMContext &Context = getLLVMContext(); 2354744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2355744016dde06fcffd50931e94a98c850f8b12cd87John McCall // Find the unique metadata ID for this name. 2356744016dde06fcffd50931e94a98c850f8b12cd87John McCall unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); 2357744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2358744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2359744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2360744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator 2361744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { 2362744016dde06fcffd50931e94a98c850f8b12cd87John McCall const Decl *D = I->first; 2363744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Addr = I->second; 2364744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2365744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { 2366744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); 23676f141659cab11109d9931d92d0988f8850778de3Jay Foad Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, DAddr)); 2368744016dde06fcffd50931e94a98c850f8b12cd87John McCall } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { 2369744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); 2370744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); 2371744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2372744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2373744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2374673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 23753dc05418538c719fea48b906bfa4febe5296e126Nick Lewyckyvoid CodeGenModule::EmitCoverageFile() { 23763dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky if (!getCodeGenOpts().CoverageFile.empty()) { 23775ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky if (llvm::NamedMDNode *CUNode = TheModule.getNamedMetadata("llvm.dbg.cu")) { 23785ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::NamedMDNode *GCov = TheModule.getOrInsertNamedMetadata("llvm.gcov"); 23795ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::LLVMContext &Ctx = TheModule.getContext(); 23803dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::MDString *CoverageFile = 23813dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::MDString::get(Ctx, getCodeGenOpts().CoverageFile); 23825ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky for (int i = 0, e = CUNode->getNumOperands(); i != e; ++i) { 23835ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::MDNode *CU = CUNode->getOperand(i); 23843dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::Value *node[] = { CoverageFile, CU }; 23855ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::MDNode *N = llvm::MDNode::get(Ctx, node); 23865ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky GCov->addOperand(N); 23875ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 23885ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 23895ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 23905ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky} 2391