CodeGenModule.cpp revision dce67a70a86db8758c926a76fdd980f5369d5746
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" 2182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov#include "TargetInfo.h" 2206057cef0bcd7804e80f3ce2bbe352178396c715Chandler Carruth#include "clang/Frontend/CodeGenOptions.h" 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 24687cc4a850b59116efee061018f0d8df50728b82Ken Dyck#include "clang/AST/CharUnits.h" 25c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2621ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 27af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor#include "clang/AST/DeclTemplate.h" 2814110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne#include "clang/AST/Mangle.h" 291a5e0d7f18485e4fb958f96dcddff3e4486a4069Anders Carlsson#include "clang/AST/RecordLayout.h" 301b63e4f732dbc73d90abf886b4d21f8e3a165f6dChris Lattner#include "clang/Basic/Builtins.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 47f16aa103d3afd42fbca2ab346f191bf745cec092John McCallstatic CGCXXABI &createCXXABI(CodeGenModule &CGM) { 48f16aa103d3afd42fbca2ab346f191bf745cec092John McCall switch (CGM.getContext().Target.getCXXABI()) { 49f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_ARM: return *CreateARMCXXABI(CGM); 50f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_Itanium: return *CreateItaniumCXXABI(CGM); 51f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_Microsoft: return *CreateMicrosoftCXXABI(CGM); 52f16aa103d3afd42fbca2ab346f191bf745cec092John McCall } 53f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 54f16aa103d3afd42fbca2ab346f191bf745cec092John McCall llvm_unreachable("invalid C++ ABI kind"); 55f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return *CreateItaniumCXXABI(CGM); 56f16aa103d3afd42fbca2ab346f191bf745cec092John McCall} 57f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 592811ccf48d6d898c42cc4cfad37abedb36236d20Chandler CarruthCodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, 60468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall llvm::Module &M, const llvm::TargetData &TD, 61468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall Diagnostic &diags) 62d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall : Context(C), Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), 63468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags), 64f16aa103d3afd42fbca2ab346f191bf745cec092John McCall ABI(createCXXABI(*this)), 6508d4792bb5d9e0e7f122c6273636807029c06aaaDaniel Dunbar Types(C, M, TD, getTargetCodeGenInfo().getABIInfo(), ABI, CGO), 663d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman TBAA(0), 67f85e193739c953358c865005855253af4f68a497John McCall VTables(*this), Runtime(0), DebugInfo(0), ARCData(0), RRData(0), 684c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian CFConstantStringClassRef(0), ConstantStringClassRef(0), 69673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar VMContext(M.getContext()), 70754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl(0), NSConcreteStackBlockDecl(0), 71673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar NSConcreteGlobalBlock(0), NSConcreteStackBlock(0), 72754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl(0), BlockObjectDisposeDecl(0), 73d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall BlockObjectAssign(0), BlockObjectDispose(0), 74d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall BlockDescriptorType(0), GenericBlockLiteralType(0) { 7560be607e5d71627bf3dab8f51c3fdca74267c692David Chisnall if (Features.ObjC1) 7660be607e5d71627bf3dab8f51c3fdca74267c692David Chisnall createObjCRuntime(); 77e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 783d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman // Enable TBAA unless it's suppressed. 793d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!CodeGenOpts.RelaxedAliasing && CodeGenOpts.OptimizationLevel > 0) 800b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman TBAA = new CodeGenTBAA(Context, VMContext, getLangOptions(), 810b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman ABI.getMangleContext()); 823d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 83e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky // If debug info or coverage generation is enabled, create the CGDebugInfo 84e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky // object. 85e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky if (CodeGenOpts.DebugInfo || CodeGenOpts.EmitGcovArcs || 86e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky CodeGenOpts.EmitGcovNotes) 87e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky DebugInfo = new CGDebugInfo(*this); 88d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall 89d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall Block.GlobalUniqueCount = 0; 905936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall 91f85e193739c953358c865005855253af4f68a497John McCall if (C.getLangOptions().ObjCAutoRefCount) 92f85e193739c953358c865005855253af4f68a497John McCall ARCData = new ARCEntrypoints(); 93f85e193739c953358c865005855253af4f68a497John McCall RRData = new RREntrypoints(); 94f85e193739c953358c865005855253af4f68a497John McCall 955936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall // Initialize the type cache. 965936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall llvm::LLVMContext &LLVMContext = M.getContext(); 970774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall VoidTy = llvm::Type::getVoidTy(LLVMContext); 980774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int8Ty = llvm::Type::getInt8Ty(LLVMContext); 990774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int32Ty = llvm::Type::getInt32Ty(LLVMContext); 1000774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int64Ty = llvm::Type::getInt64Ty(LLVMContext); 1015936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall PointerWidthInBits = C.Target.getPointerWidth(0); 10234695856c0e67b3765b46304cc71b5d2cd5b71c7John McCall PointerAlignInBytes = 10334695856c0e67b3765b46304cc71b5d2cd5b71c7John McCall C.toCharUnitsFromBits(C.Target.getPointerAlign(0)).getQuantity(); 1045936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall IntTy = llvm::IntegerType::get(LLVMContext, C.Target.getIntWidth()); 1055936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall IntPtrTy = llvm::IntegerType::get(LLVMContext, PointerWidthInBits); 1065936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8PtrTy = Int8Ty->getPointerTo(0); 1075936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8PtrPtrTy = Int8PtrTy->getPointerTo(0); 1082b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 1092b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 1102b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 111815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 112f16aa103d3afd42fbca2ab346f191bf745cec092John McCall delete &ABI; 1134376c85fb0ac9e7fd779d246efc77e1169179138Dan Gohman delete TBAA; 114815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 115f85e193739c953358c865005855253af4f68a497John McCall delete ARCData; 116f85e193739c953358c865005855253af4f68a497John McCall delete RRData; 117815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 118815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 1190d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnallvoid CodeGenModule::createObjCRuntime() { 1200d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall if (!Features.NeXTRuntime) 1210d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateGNUObjCRuntime(*this); 1220d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else 1230d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateMacObjCRuntime(*this); 1240d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall} 1250d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall 126815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 12782227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 1286c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalInitFunc(); 129efb0fa9e11f75af51744a6159530ef7cc8efa24aDaniel Dunbar EmitCXXGlobalDtorFunc(); 130208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 131208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 132208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 1336bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 1346bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 135532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 1360269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 137744016dde06fcffd50931e94a98c850f8b12cd87John McCall 138b25938303de0976b9f189363d43033e5788e3d36John McCall SimplifyPersonality(); 139b25938303de0976b9f189363d43033e5788e3d36John McCall 140744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (getCodeGenOpts().EmitDeclMetadata) 141744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitDeclMetadata(); 1425ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky 1435ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky if (getCodeGenOpts().EmitGcovArcs || getCodeGenOpts().EmitGcovNotes) 1443dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky EmitCoverageFile(); 145f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 146f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 147e80d56771736c85fd8365c394a6731923b17e91dDevang Patelvoid CodeGenModule::UpdateCompletedType(const TagDecl *TD) { 148e80d56771736c85fd8365c394a6731923b17e91dDevang Patel // Make sure that this type is translated. 149e80d56771736c85fd8365c394a6731923b17e91dDevang Patel Types.UpdateCompletedType(TD); 150e80d56771736c85fd8365c394a6731923b17e91dDevang Patel if (DebugInfo) 151e80d56771736c85fd8365c394a6731923b17e91dDevang Patel DebugInfo->UpdateCompletedType(TD); 152e80d56771736c85fd8365c394a6731923b17e91dDevang Patel} 153e80d56771736c85fd8365c394a6731923b17e91dDevang Patel 1543d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanllvm::MDNode *CodeGenModule::getTBAAInfo(QualType QTy) { 1553d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!TBAA) 1563d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return 0; 1573d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return TBAA->getTBAAInfo(QTy); 1583d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1593d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1603d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanvoid CodeGenModule::DecorateInstruction(llvm::Instruction *Inst, 1613d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman llvm::MDNode *TBAAInfo) { 1623d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman Inst->setMetadata(llvm::LLVMContext::MD_tbaa, TBAAInfo); 1633d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1643d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1656374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCallbool CodeGenModule::isTargetDarwin() const { 166db57a4cdb0a6abf3239f3a794a900ce312c5887bDaniel Dunbar return getContext().Target.getTriple().isOSDarwin(); 1676374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall} 1686374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 16932096695c76033a6b0b1747c439f7378a11e8312John McCallvoid CodeGenModule::Error(SourceLocation loc, llvm::StringRef error) { 17032096695c76033a6b0b1747c439f7378a11e8312John McCall unsigned diagID = getDiags().getCustomDiagID(Diagnostic::Error, error); 17132096695c76033a6b0b1747c439f7378a11e8312John McCall getDiags().Report(Context.getFullLoc(loc), diagID); 17232096695c76033a6b0b1747c439f7378a11e8312John McCall} 17332096695c76033a6b0b1747c439f7378a11e8312John McCall 174488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 1752c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 17690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 17790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 17890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 17990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 18156b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 1822c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 1830a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 1840a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 1852c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 18658c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 187488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 188c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 18990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 19090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 19190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 19290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 19456b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 195c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 1960a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 197c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 198c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 199bc8d40d85f3fa1e34569834916f18fecaa635152John McCallllvm::ConstantInt *CodeGenModule::getSize(CharUnits size) { 200bc8d40d85f3fa1e34569834916f18fecaa635152John McCall return llvm::ConstantInt::get(SizeTy, size.getQuantity()); 201bc8d40d85f3fa1e34569834916f18fecaa635152John McCall} 202bc8d40d85f3fa1e34569834916f18fecaa635152John McCall 2031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 2040ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson const NamedDecl *D) const { 20504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 206df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 2077e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 2086ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 2097e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 2106ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 211af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility for definitions. 212af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 213c7c9058f4977ef4584d68718e23f34504b150ef4Fariborz Jahanian if (LV.visibilityExplicit() || !GV->hasAvailableExternallyLinkage()) 214c7c9058f4977ef4584d68718e23f34504b150ef4Fariborz Jahanian GV->setVisibility(GetLLVMVisibility(LV.visibility())); 2157cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 2167cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 217cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// Set the symbol visibility of type information (vtable and RTTI) 218cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// associated with the given type. 219cbfe50224b19119e759802bd0c1463269dffd09eJohn McCallvoid CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV, 220cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall const CXXRecordDecl *RD, 221fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson TypeVisibilityKind TVK) const { 2220ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(GV, RD); 223cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 224279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakVTables) 225279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall return; 226279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall 2279a86a137b0872bad25161fb3408a71d919638757Anders Carlsson // We never want to drop the visibility for RTTI names. 2289a86a137b0872bad25161fb3408a71d919638757Anders Carlsson if (TVK == TVK_ForRTTIName) 2299a86a137b0872bad25161fb3408a71d919638757Anders Carlsson return; 2309a86a137b0872bad25161fb3408a71d919638757Anders Carlsson 231cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We want to drop the visibility to hidden for weak type symbols. 232cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // This isn't possible if there might be unresolved references 233cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // elsewhere that rely on this symbol being visible. 234cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2357a536907da776bdc47a704e7cafd641e8150e653John McCall // This should be kept roughly in sync with setThunkVisibility 2367a536907da776bdc47a704e7cafd641e8150e653John McCall // in CGVTables.cpp. 2377a536907da776bdc47a704e7cafd641e8150e653John McCall 238cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Preconditions. 239f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson if (GV->getLinkage() != llvm::GlobalVariable::LinkOnceODRLinkage || 240cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->getVisibility() != llvm::GlobalVariable::DefaultVisibility) 241cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 242cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 243cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Don't override an explicit visibility attribute. 2444421d2b341d041df44013769f23c306308bbab83Douglas Gregor if (RD->getExplicitVisibility()) 245cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 246cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 247cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall switch (RD->getTemplateSpecializationKind()) { 248cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We have to disable the optimization if this is an EI definition 249cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // because there might be EI declarations in other shared objects. 250cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDefinition: 251cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDeclaration: 252cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 253cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2547a536907da776bdc47a704e7cafd641e8150e653John McCall // Every use of a non-template class's type information has to emit it. 255cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_Undeclared: 256cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 257cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2587a536907da776bdc47a704e7cafd641e8150e653John McCall // In theory, implicit instantiations can ignore the possibility of 2597a536907da776bdc47a704e7cafd641e8150e653John McCall // an explicit instantiation declaration because there necessarily 2607a536907da776bdc47a704e7cafd641e8150e653John McCall // must be an EI definition somewhere with default visibility. In 2617a536907da776bdc47a704e7cafd641e8150e653John McCall // practice, it's possible to have an explicit instantiation for 2627a536907da776bdc47a704e7cafd641e8150e653John McCall // an arbitrary template class, and linkers aren't necessarily able 2637a536907da776bdc47a704e7cafd641e8150e653John McCall // to deal with mixed-visibility symbols. 2647a536907da776bdc47a704e7cafd641e8150e653John McCall case TSK_ExplicitSpecialization: 265cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ImplicitInstantiation: 266279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakTemplateVTables) 2677a536907da776bdc47a704e7cafd641e8150e653John McCall return; 268cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 269cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall } 270cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 271cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // If there's a key function, there may be translation units 272cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // that don't have the key function's definition. But ignore 273cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // this if we're emitting RTTI under -fno-rtti. 274fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson if (!(TVK != TVK_ForRTTI) || Features.RTTI) { 275cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (Context.getKeyFunction(RD)) 276cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 277fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson } 278cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 279cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Otherwise, drop the visibility to hidden. 280cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 281b1c65ff108de47a89585ad37874bd6cb232664cdRafael Espindola GV->setUnnamedAddr(true); 282cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall} 283cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 284793a990774826a0c20b0da66cec0991badfb8b63Anders Carlssonllvm::StringRef CodeGenModule::getMangledName(GlobalDecl GD) { 285793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 286793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 287793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; 288793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (!Str.empty()) 289793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 290793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 2914c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall if (!getCXXABI().getMangleContext().shouldMangleDeclName(ND)) { 292793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson IdentifierInfo *II = ND->getIdentifier(); 293793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson assert(II && "Attempt to mangle unnamed decl."); 294793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 295793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = II->getName(); 296793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 297793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson } 298793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 299793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::SmallString<256> Buffer; 300c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola llvm::raw_svector_ostream Out(Buffer); 301793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 302c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Out); 303793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 304c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Out); 305793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const BlockDecl *BD = dyn_cast<BlockDecl>(ND)) 306c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleBlock(BD, Out); 307793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else 308c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleName(ND, Out); 309793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 310793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson // Allocate space for the mangled name. 311c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola Out.flush(); 312793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson size_t Length = Buffer.size(); 313793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson char *Name = MangledNamesAllocator.Allocate<char>(Length); 314793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson std::copy(Buffer.begin(), Buffer.end(), Name); 315793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 316793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = llvm::StringRef(Name, Length); 317793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 318793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 319793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson} 320793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 32114110477887e3dc168ffc6c191e72d705051f99ePeter Collingbournevoid CodeGenModule::getBlockMangledName(GlobalDecl GD, MangleBuffer &Buffer, 32214110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const BlockDecl *BD) { 32314110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleContext &MangleCtx = getCXXABI().getMangleContext(); 32414110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const Decl *D = GD.getDecl(); 325c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola llvm::raw_svector_ostream Out(Buffer.getBuffer()); 32614110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne if (D == 0) 327c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleGlobalBlock(BD, Out); 32814110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 329c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleCtorBlock(CD, GD.getCtorType(), BD, Out); 33014110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 331c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleDtorBlock(DD, GD.getDtorType(), BD, Out); 33214110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else 333c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleBlock(cast<DeclContext>(D), BD, Out); 3349a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson} 3359a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson 336f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::GlobalValue *CodeGenModule::GetGlobalValue(llvm::StringRef Name) { 337f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return getModule().getNamedValue(Name); 3385f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 3395f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 3406d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 3416d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 3426bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 34349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3446bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 3456d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3466d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 3476bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 3486bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 3496bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 35049988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3516bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 3526bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 3536bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3546bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 3556bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 3560774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall llvm::FunctionType* CtorFTy = llvm::FunctionType::get(VoidTy, false); 35796e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 3586bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3596bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 360c5cbb909e8a27deb8f1a2b6b7bf56a96051af81aChris Lattner llvm::StructType *CtorStructTy = 3617650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType::get(llvm::Type::getInt32Ty(VMContext), 36296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 3636bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3646bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 3656bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 3666bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 3676bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 3681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 3690032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 3703c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 37108e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 3726bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 3736bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3746bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 37596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 3761c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 377572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 3787db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 3791c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 3806d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 3816d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3826d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 383532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 384532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 385532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 386532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 387532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 388532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 38996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 390532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 391532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 3921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *gv = 3931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(TheModule, Array->getType(), false, 3941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::AppendingLinkage, Array, 3951c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.global.annotations"); 396532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 397532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 398532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 399d46f98573ba104eda102dd3224b2dca69f1c6336John McCallllvm::GlobalValue::LinkageTypes 400d46f98573ba104eda102dd3224b2dca69f1c6336John McCallCodeGenModule::getFunctionLinkage(const FunctionDecl *D) { 40190e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); 4027c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 403f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_Internal) 404d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::InternalLinkage; 405f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 406f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<DLLExportAttr>()) 407d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::DLLExportLinkage; 408f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 409f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<WeakAttr>()) 410d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::WeakAnyLinkage; 411f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 412f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 413f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition somewhere else, so we can use available_externally linkage. 414f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_C99Inline) 415fd0f89d3d7e4220327abdec1cb115474d70219dcFariborz Jahanian return llvm::Function::AvailableExternallyLinkage; 416f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 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 435142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian : llvm::Function::InternalLinkage; 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 47140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<AlwaysInlineAttr>()) 472af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 4731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 474dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar if (D->hasAttr<NakedAttr>()) 475dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar F->addFnAttr(llvm::Attribute::Naked); 476dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar 4771feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 47881ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 479f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 480c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) 481c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola F->setUnnamedAddr(true); 482c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola 483fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson if (Features.getStackProtectorMode() == LangOptions::SSPOn) 484fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 485fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson else if (Features.getStackProtectorMode() == LangOptions::SSPReq) 486fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 487fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 488cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); 489cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt if (alignment) 490cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt F->setAlignment(alignment); 491cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt 492fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 493bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 494bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 495f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 496f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 4987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 499934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) 500934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson setGlobalVisibility(GV, ND); 5011fb0caaa7bef765b85972274e3b434af2572c141John McCall else 5021fb0caaa7bef765b85972274e3b434af2572c141John McCall GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 5037c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 50440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 5057c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 5067c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 50740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 5087c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 50982d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 51082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); 5117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 5127c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5130e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 5140e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 5150e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 5160e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 5170e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 5187c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5197c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 5207c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5210e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 522f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 523f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 524b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlssonvoid CodeGenModule::SetFunctionAttributes(GlobalDecl GD, 525c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 526c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 5270ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne if (unsigned IID = F->getIntrinsicID()) { 5280ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne // If this is an intrinsic function, set the function's attributes 5290ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne // to the intrinsic's attributes. 5300ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne F->setAttributes(llvm::Intrinsic::getAttributes((llvm::Intrinsic::ID)IID)); 5310ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne return; 5320ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne } 5330ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne 534b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); 535b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson 536c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 537b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); 5381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5397c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 5407c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 5411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 54240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 5437c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 5441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 5450a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor FD->isWeakImported()) { 5467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 5471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 5487c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 5497c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 5501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 551af14603ca61757cf4361b583b45639a04c57e651John McCall 552af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = FD->getLinkageAndVisibility(); 553af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() == ExternalLinkage && LV.visibilityExplicit()) { 554af14603ca61757cf4361b583b45639a04c57e651John McCall F->setVisibility(GetLLVMVisibility(LV.visibility())); 555af14603ca61757cf4361b583b45639a04c57e651John McCall } 5567c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 5577c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 55840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 5597c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 560219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 561219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 5620269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 5631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 5640269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 56535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 5660269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5670269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5680269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 5690269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 570ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 5710269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 5720269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5732acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 5741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 57535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 57635f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 57735f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 57835f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 5791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 5801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 581a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 58235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 5831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 584c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 585c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 58696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 5871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 5891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 5900269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 5917db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 5921c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 5930269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5940269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 5950269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5960269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5970269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 59867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 59967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 600dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky // for a static function, iterate until no changes are made. 601bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 602046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson while (!DeferredDeclsToEmit.empty() || !DeferredVTables.empty()) { 603046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson if (!DeferredVTables.empty()) { 604046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson const CXXRecordDecl *RD = DeferredVTables.back(); 605046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson DeferredVTables.pop_back(); 606046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson getVTables().GenerateClassData(getVTableLinkage(RD), RD); 607bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola continue; 608bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola } 609bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 6102a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 61167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 61267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 613c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // Check to see if we've already emitted this. This is necessary 614c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // for a couple of reasons: first, decls can end up in the 615c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // deferred-decls queue multiple times, and second, decls can end 616c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // up with definitions in unusual ways (e.g. by an extern inline 617c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // function acquiring a strong function redefinition). Just 618c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // ignore these cases. 619c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // 620c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // TODO: That said, looking this up multiple times is very wasteful. 6219a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef Name = getMangledName(D); 622f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *CGRef = GetGlobalValue(Name); 62367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 6241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 62567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 62667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 6271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 628c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // GlobalAlias::isDeclaration() defers to the aliasee, but for our 629c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // purposes an alias counts as a definition. 630c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall if (isa<llvm::GlobalAlias>(CGRef)) 631c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall continue; 632c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall 63367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 63467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 63567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 6365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 6398bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 6401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 6411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// GlobalValue being annotated. The second field is the constant string 6421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// created from the AnnotateAttr's annotation. The third field is a constant 6438bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 6448bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 6458bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6468bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 6478bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 6488bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 6508bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 6518bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 6528bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 6538bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6548bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 6558bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 6562acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); 6571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *anno = llvm::ConstantArray::get(VMContext, 6580032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson AA->getAnnotation(), true); 6590032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *unit = llvm::ConstantArray::get(VMContext, 6600032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson M->getModuleIdentifier(), 6618bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 6628bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6638bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 6648bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 6651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *annoGV = 66695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, anno->getType(), false, 66795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, anno, 66895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GV->getName()); 6698bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 6708bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 67195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, unit->getType(), false, 6721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::PrivateLinkage, unit, 67395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ".str"); 674d3d4e1ee398748468cbaaddb3b0af5953f043803Rafael Espindola unitGV->setUnnamedAddr(true); 6758bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 67657d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 6778bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 6783c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, SBP), 6793c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(annoGV, SBP), 6803c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(unitGV, SBP), 6810032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) 6828bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 683c5cbb909e8a27deb8f1a2b6b7bf56a96051af81aChris Lattner return llvm::ConstantStruct::getAnon(Fields); 6848bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 6858bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 686a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidisbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 68790e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis // Never defer when EmitAllDecls is specified. 68890e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis if (Features.EmitAllDecls) 689a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidis return false; 6900b6bc8bd7a1d2a7d7478d13d78cff94cacad61fcDouglas Gregor 6914ac7c0bb39696e92fd220118fedc484c09a69870Argyrios Kyrtzidis return !getContext().DeclMustBeEmitted(Global); 69273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 69373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 6946a836706c40a31c716952b74785102c90fd6afa7Rafael Espindolallvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { 6956a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const AliasAttr *AA = VD->getAttr<AliasAttr>(); 6966a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola assert(AA && "No alias?"); 6976a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6982acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); 6996a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7006a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // See if there is already something with the target's name in the module. 701f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); 7026a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7036a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::Constant *Aliasee; 7046a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (isa<llvm::FunctionType>(DeclTy)) 7051faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 7061faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 7076a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola else 708f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 7096a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::PointerType::getUnqual(DeclTy), 0); 7106a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (!Entry) { 7116a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); 7126a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola F->setLinkage(llvm::Function::ExternalWeakLinkage); 7136a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.insert(F); 7146a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 7156a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7166a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return Aliasee; 7176a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola} 7186a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 719b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 7204a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 7211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7226a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // Weak references don't produce any output by themselves. 7236a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (Global->hasAttr<WeakRefAttr>()) 7246a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return; 7256a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 726bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 727bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 72840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 729f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return EmitAliasDefinition(GD); 730219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 73167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 7325e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 733754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (FD->getIdentifier()) { 734754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = FD->getName(); 735754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_Block_object_assign") { 736754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl = FD; 737754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_Block_object_dispose") { 738754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl = FD; 739754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 740754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 741754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 74273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 743dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky if (!FD->doesThisDeclarationHaveABody()) { 744dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky if (!FD->doesDeclarationForceExternallyVisibleDefinition()) 745dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky return; 746dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky 747dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky const FunctionDecl *InlineDefinition = 0; 748dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky FD->getBody(InlineDefinition); 749dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky 750dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky llvm::StringRef MangledName = getMangledName(GD); 751dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky llvm::StringMap<GlobalDecl>::iterator DDI = 752dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky DeferredDecls.find(MangledName); 753dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky if (DDI != DeferredDecls.end()) 754dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky DeferredDecls.erase(DDI); 755dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky EmitGlobalDefinition(InlineDefinition); 75673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 757dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky } 7580269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 7590269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 760bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 761bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 762754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (VD->getIdentifier()) { 763754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = VD->getName(); 764754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_NSConcreteGlobalBlock") { 765754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl = VD; 766754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_NSConcreteStackBlock") { 767754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl = VD; 768754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 769754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 770754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 771754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 772a9a55c063e9e59c6ab0a6d7a21302660f7bde9f9Douglas Gregor if (VD->isThisDeclarationADefinition() != VarDecl::Definition) 77373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7744c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 7754c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 77667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 77767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 7784357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (!MayDeferGeneration(Global)) { 7794357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Emit the definition if it can't be deferred. 7804357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner EmitGlobalDefinition(GD); 781bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 782bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 783bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall 784bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // If we're deferring emission of a C++ variable with an 785bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer, remember the order in which it appeared in the file. 786bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus && isa<VarDecl>(Global) && 787bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall cast<VarDecl>(Global)->hasInit()) { 788bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); 789bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall CXXGlobalInits.push_back(0); 790bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } 7914357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 7924357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // If the value has already been used, add it directly to the 7934357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit list. 7949a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 7954357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (GetGlobalValue(MangledName)) 7964357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDeclsToEmit.push_back(GD); 7974357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner else { 7984357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 7994357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // first use of the mangled name will cause it to move into 8004357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit. 8014357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDecls[MangledName] = GD; 8024357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner } 8034c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 8044c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 805b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 8064a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 8071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 808cb421fa690da545b58a720abe5f1c49b166dbde7Dan Gohman PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), 8098e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 8108e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 8118e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 81244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 81344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // At -O0, don't generate IR for functions with available_externally 81444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // linkage. 8157feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor if (CodeGenOpts.OptimizationLevel == 0 && 8167feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor !Function->hasAttr<AlwaysInlineAttr>() && 81744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getFunctionLinkage(Function) 81844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor == llvm::Function::AvailableExternallyLinkage) 81944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return; 82044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor 82144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { 8227dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman // Make sure to emit the definition(s) before we emit the thunks. 8237dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman // This is necessary for the generation of certain thunks. 8247dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) 8257dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitCXXConstructor(CD, GD.getCtorType()); 8267dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman else if (const CXXDestructorDecl *DD =dyn_cast<CXXDestructorDecl>(Method)) 8277dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitCXXDestructor(DD, GD.getDtorType()); 8287dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman else 8297dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitGlobalFunctionDefinition(GD); 8307dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman 83144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (Method->isVirtual()) 83244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getVTables().EmitThunks(GD); 8337270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson 8347dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman return; 83544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 836b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 837b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalFunctionDefinition(GD); 83844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 839b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 840b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 841b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalVarDefinition(VD); 8424357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 8434357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner assert(0 && "Invalid argument to EmitGlobalDefinition()"); 844bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 845bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 84674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 84774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 84874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 84974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 85074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 85174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 85274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 853f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 854f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMFunction(llvm::StringRef MangledName, 8552acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty, 856f85e193739c953358c865005855253af4f68a497John McCall GlobalDecl D, bool ForVTable, 857f85e193739c953358c865005855253af4f68a497John McCall llvm::Attributes ExtraAttrs) { 8580558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 859f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 8600558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 8616a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 8626a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); 8636a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (FD && !FD->hasAttr<WeakAttr>()) 8647270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 8656a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8666a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 8676a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 8686a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8690558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 8700558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 8711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8720558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 8739cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return llvm::ConstantExpr::getBitCast(Entry, Ty->getPointerTo()); 8740558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 8751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 876654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 877654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 878654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 879654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 880784f21121a6c9418ebd86baa6814e36e1176c410John McCall 8812acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *FTy; 882784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (isa<llvm::FunctionType>(Ty)) { 883784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = cast<llvm::FunctionType>(Ty); 884784f21121a6c9418ebd86baa6814e36e1176c410John McCall } else { 8850774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall FTy = llvm::FunctionType::get(VoidTy, false); 886654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 887654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 888bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 889784f21121a6c9418ebd86baa6814e36e1176c410John McCall llvm::Function *F = llvm::Function::Create(FTy, 890654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 891f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall MangledName, &getModule()); 892f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(F->getName() == MangledName && "name was uniqued!"); 893654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 894b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetFunctionAttributes(D, F, IsIncompleteFunction); 895f85e193739c953358c865005855253af4f68a497John McCall if (ExtraAttrs != llvm::Attribute::None) 896f85e193739c953358c865005855253af4f68a497John McCall F->addFnAttr(ExtraAttrs); 897654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 89867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 89967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 90067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 901f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 90267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 90367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 90467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 90567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 90667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 907bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall 908bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Otherwise, there are cases we have to worry about where we're 909bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // using a declaration for which we must emit a definition but where 910bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // we might not find a top-level definition: 911bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - member functions defined inline in their classes 912bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - friend functions defined inline in some class 913bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - special member functions with implicit definitions 914bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // If we ever change our AST traversal to walk into class methods, 915bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // this will be unnecessary. 9161faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // 9171faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // We also don't emit a definition for a function if it's going to be an entry 9181faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // in a vtable, unless it's already marked as used. 91901de7a44cea9f77cbcda65faad8edc8b48a3b617Rafael Espindola } else if (getLangOptions().CPlusPlus && D.getDecl()) { 920bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Look for a declaration that's lexically in a record. 921bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall const FunctionDecl *FD = cast<FunctionDecl>(D.getDecl()); 922bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall do { 923bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { 9241faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson if (FD->isImplicit() && !ForVTable) { 925bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall assert(FD->isUsed() && "Sema didn't mark implicit function as used!"); 926a29bf41b8f49578207ce36f6b21ff9bb7ee77babDouglas Gregor DeferredDeclsToEmit.push_back(D.getWithDecl(FD)); 927bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 92810620eb5164e31208fcbf0437cd79ae535ed0559Sean Hunt } else if (FD->doesThisDeclarationHaveABody()) { 929a29bf41b8f49578207ce36f6b21ff9bb7ee77babDouglas Gregor DeferredDeclsToEmit.push_back(D.getWithDecl(FD)); 930bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 931bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } 9327b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 933bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall FD = FD->getPreviousDeclaration(); 934bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } while (FD); 93567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 9361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 937784f21121a6c9418ebd86baa6814e36e1176c410John McCall // Make sure the result is of the requested type. 938784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (!IsIncompleteFunction) { 939784f21121a6c9418ebd86baa6814e36e1176c410John McCall assert(F->getType()->getElementType() == Ty); 940784f21121a6c9418ebd86baa6814e36e1176c410John McCall return F; 941784f21121a6c9418ebd86baa6814e36e1176c410John McCall } 942784f21121a6c9418ebd86baa6814e36e1176c410John McCall 9439cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 944784f21121a6c9418ebd86baa6814e36e1176c410John McCall return llvm::ConstantExpr::getBitCast(F, PTy); 9450558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 9460558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 94774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 94874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 94974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 950b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 9512acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty, 9521faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson bool ForVTable) { 95374391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 95474391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 9554a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 956bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 9579a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 9581faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson return GetOrCreateLLVMFunction(MangledName, Ty, GD, ForVTable); 95974391b48b4791cded373683a3baf67314f358d50Chris Lattner} 96077ba708819285931932ecd33691a672bb59d221aEli Friedman 96174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 96274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 96374391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 9642acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris LattnerCodeGenModule::CreateRuntimeFunction(llvm::FunctionType *FTy, 965f85e193739c953358c865005855253af4f68a497John McCall llvm::StringRef Name, 966f85e193739c953358c865005855253af4f68a497John McCall llvm::Attributes ExtraAttrs) { 967f85e193739c953358c865005855253af4f68a497John McCall return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false, 968f85e193739c953358c865005855253af4f68a497John McCall ExtraAttrs); 96974391b48b4791cded373683a3baf67314f358d50Chris Lattner} 970bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 971da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregorstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D, 972da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor bool ConstantInit) { 97388786862424cb2d478516d911709dc19c962af9cJohn McCall if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) 97420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 975da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor 976da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (Context.getLangOptions().CPlusPlus) { 977da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (const RecordType *Record 978da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor = Context.getBaseElementType(D->getType())->getAs<RecordType>()) 9792bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor return ConstantInit && 9802bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor cast<CXXRecordDecl>(Record->getDecl())->isPOD() && 9812bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor !cast<CXXRecordDecl>(Record->getDecl())->hasMutableFields(); 98220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 983da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor 98420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 98520e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 98620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 98774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 98874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 98974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 99074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 99174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 99274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 99374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 994f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 995f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMGlobal(llvm::StringRef MangledName, 9962acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::PointerType *Ty, 997c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola const VarDecl *D, 998c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola bool UnnamedAddr) { 9993c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 1000f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 100199b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 10026a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 10036a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (D && !D->hasAttr<WeakAttr>()) 10047270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 10056a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 10066a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 10076a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 10086a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 1009c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola if (UnnamedAddr) 1010c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola Entry->setUnnamedAddr(true); 1011c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola 101274391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 1013570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 10141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 101599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 10163c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 101799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 10181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 101967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 102067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 102167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 1022f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 102367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 102467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 102567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 102667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 102767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 102867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 10291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 10311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 103299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 1033f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 0, MangledName, 0, 103456ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 103549988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 103699b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 103774391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 1038f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 1039f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 1040da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor GV->setConstant(DeclIsConstantGlobal(Context, D, false)); 104149988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 1042110e8e56af30363072c140285961592b0107f789John McCall // Set linkage and visibility in case we never see a definition. 1043af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 1044af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() != ExternalLinkage) { 104515e310a3b970b64a84cb30f0005bc396b4d978cbJohn McCall // Don't set internal linkage on declarations. 1046110e8e56af30363072c140285961592b0107f789John McCall } else { 1047110e8e56af30363072c140285961592b0107f789John McCall if (D->hasAttr<DLLImportAttr>()) 1048110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::DLLImportLinkage); 10490a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor else if (D->hasAttr<WeakAttr>() || D->isWeakImported()) 1050110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 1051110e8e56af30363072c140285961592b0107f789John McCall 1052af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility on a declaration only if it's explicit. 1053af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.visibilityExplicit()) 1054af14603ca61757cf4361b583b45639a04c57e651John McCall GV->setVisibility(GetLLVMVisibility(LV.visibility())); 1055110e8e56af30363072c140285961592b0107f789John McCall } 105656ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 105756ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 105874391b48b4791cded373683a3baf67314f358d50Chris Lattner } 10591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1060f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GV; 106174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 1062eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 1063eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 10643bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlssonllvm::GlobalVariable * 10653bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders CarlssonCodeGenModule::CreateOrReplaceCXXRuntimeVariable(llvm::StringRef Name, 10662acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty, 10673bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalValue::LinkageTypes Linkage) { 10683bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name); 10693bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *OldGV = 0; 10703bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10713bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10723bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV) { 10733bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Check if the variable has the right type. 10743bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV->getType()->getElementType() == Ty) 10753bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 10763bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10773bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Because C++ name mangling, the only way we can end up with an already 10783bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // existing global with the same name is if it has been declared extern "C". 107996eaf2992b5955d1470fc9cce7a96e7e1e3b4ea7Anders Carlsson assert(GV->isDeclaration() && "Declaration has wrong type!"); 10803bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV = GV; 10813bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10823bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10833bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Create a new variable. 10843bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV = new llvm::GlobalVariable(getModule(), Ty, /*isConstant=*/true, 10853bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson Linkage, 0, Name); 10863bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10873bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (OldGV) { 10883bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Replace occurrences of the old variable if needed. 10893bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV->takeName(OldGV); 10903bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10913bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (!OldGV->use_empty()) { 10923bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::Constant *NewPtrForOldDecl = 10933bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); 10943bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->replaceAllUsesWith(NewPtrForOldDecl); 10953bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10963bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10973bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->eraseFromParent(); 10983bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10993bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 11003bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 11013bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson} 11023bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 110374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 110474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 110574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 110674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 110774391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 11082acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty) { 110974391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 111074391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 111174391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 111274391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 11131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11142acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::PointerType *PTy = 1115207f4d8543529221932af82836016a2ef066c917Peter Collingbourne llvm::PointerType::get(Ty, getContext().getTargetAddressSpace(ASTTy)); 1116f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 11179a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1118f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMGlobal(MangledName, PTy, D); 111974391b48b4791cded373683a3baf67314f358d50Chris Lattner} 11203f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 112174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 112274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 112374391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 11242acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris LattnerCodeGenModule::CreateRuntimeVariable(llvm::Type *Ty, 1125f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 11261de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0, 1127c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola true); 1128bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1129bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 113003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 113103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 113203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 11337520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 11347520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 11357520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 11367520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 11379a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1138f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (!GetGlobalValue(MangledName)) { 1139555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 114003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 11417520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 11427520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 11437520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 11447520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 114503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 114603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 114703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 11486fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregorvoid CodeGenModule::EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired) { 11496fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor if (DefinitionRequired) 11506fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor getVTables().GenerateClassData(getVTableLinkage(Class), Class); 11516fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor} 11526fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor 11534b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregorllvm::GlobalVariable::LinkageTypes 1154046c294a43024874ff35656c6e785b64e72f1f36Anders CarlssonCodeGenModule::getVTableLinkage(const CXXRecordDecl *RD) { 1155cb5d2d0647fdab2e36c85b417e03bf18916ce10cEli Friedman if (RD->getLinkage() != ExternalLinkage) 1156dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::InternalLinkage; 1157dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1158dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (const CXXMethodDecl *KeyFunction 1159dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor = RD->getASTContext().getKeyFunction(RD)) { 1160dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // If this class has a key function, use that to determine the linkage of 1161dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // the vtable. 11624b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor const FunctionDecl *Def = 0; 116306a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (KeyFunction->hasBody(Def)) 11644b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor KeyFunction = cast<CXXMethodDecl>(Def); 1165dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 11664b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor switch (KeyFunction->getTemplateSpecializationKind()) { 11674b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_Undeclared: 11684b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitSpecialization: 11696d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // When compiling with optimizations turned on, we emit all vtables, 11706d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // even if the key function is not defined in the current translation 11716d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // unit. If this is the case, use available_externally linkage. 11726d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson if (!Def && CodeGenOpts.OptimizationLevel) 11736d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson return llvm::GlobalVariable::AvailableExternallyLinkage; 11746d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson 11754b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->isInlined()) 1176142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1177142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1178142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 11794b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11804b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::ExternalLinkage; 11814b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11824b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ImplicitInstantiation: 1183142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1184142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1185142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1186f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 11874b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDefinition: 1188142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1189142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::WeakODRLinkage : 1190142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1191f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 11924b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 11934b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // FIXME: Use available_externally linkage. However, this currently 11944b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // breaks LLVM's build due to undefined symbols. 11954b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1196142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1197142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1198142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 11994b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 1200dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor } 1201dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 120253bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian if (Context.getLangOptions().AppleKext) 120353bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::Function::InternalLinkage; 120453bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian 1205dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor switch (RD->getTemplateSpecializationKind()) { 1206dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_Undeclared: 1207dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitSpecialization: 1208dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ImplicitInstantiation: 1209dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // FIXME: Use available_externally linkage. However, this currently 1210dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // breaks LLVM's build due to undefined symbols. 1211dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1212142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDeclaration: 121353bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 1214142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian 1215142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDefinition: 121653bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 12174b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 12184b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 12194b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // Silence GCC warning. 122053bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 12214b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor} 12224b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 12232acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris LattnerCharUnits CodeGenModule::GetTargetTypeStoreSize(llvm::Type *Ty) const { 122406f486ecd05bd6788da97c39164c1903a084c26dKen Dyck return Context.toCharUnitsFromBits( 122506f486ecd05bd6788da97c39164c1903a084c26dKen Dyck TheTargetData.getTypeStoreSizeInBits(Ty)); 1226687cc4a850b59116efee061018f0d8df50728b82Ken Dyck} 1227687cc4a850b59116efee061018f0d8df50728b82Ken Dyck 1228bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 12298f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 123077ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 12316c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman bool NonConstInit = false; 12321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 123331310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl const Expr *InitExpr = D->getAnyInitializer(); 12343bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson 12353bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson if (!InitExpr) { 1236cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 123703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 123803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 123903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 124003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 124103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 124203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 124303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 124403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 124503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 1246b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 124777ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 1248c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor Init = EmitConstantExpr(InitExpr, D->getType()); 12496e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 12503bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson QualType T = InitExpr->getType(); 1251c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor if (D->getType()->isReferenceType()) 1252c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor T = D->getType(); 1253c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor 125489ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 125589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 12566c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman NonConstInit = true; 125789ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 125889ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 125989ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 126089ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 1261bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } else { 1262bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // We don't need an initializer, so remove the entry for the delayed 1263bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer position (just in case this entry was delayed). 1264bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus) 1265bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition.erase(D); 12666e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 12678f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 12688e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 12692acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type* InitType = Init->getType(); 1270570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 12711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1272570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 1273570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 12749d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 12759d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 12769d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 1277570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 1278570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 12791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1280570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 1281570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 12821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1283570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 1284570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 1285570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 1286570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 1287570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 1288570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 1289570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 1290570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 1291570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 1292570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 1293570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 1294207f4d8543529221932af82836016a2ef066c917Peter Collingbourne GV->getType()->getAddressSpace() != 1295207f4d8543529221932af82836016a2ef066c917Peter Collingbourne getContext().getTargetAddressSpace(ASTTy)) { 12961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1297f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // Move the old entry aside so that we'll create a new one. 1298f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Entry->setName(llvm::StringRef()); 1299232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 1300570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 1301570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 13020558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 130377ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 13041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 13053c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 1306570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 130777ba708819285931932ecd33691a672bb59d221aEli Friedman 130877ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 1309570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 131077ba708819285931932ecd33691a672bb59d221aEli Friedman } 131177ba708819285931932ecd33691a672bb59d221aEli Friedman 131240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 13138bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 13148bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 1315f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 13168bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 13178bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 131888a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 1319e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 1320e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 1321e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 1322da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (!NonConstInit && DeclIsConstantGlobal(Context, D, true)) 1323e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 13241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13258b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); 1326354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 132788a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 1328354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage = 1329354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GetLLVMLinkageVarDefinition(D, GV); 1330354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setLinkage(Linkage); 1331354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian if (Linkage == llvm::GlobalVariable::CommonLinkage) 1332354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // common vars aren't constant even if declared const. 1333354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setConstant(false); 1334354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1335354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian SetCommonAttributes(D, GV); 1336354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 13373030eb82593097502469a8b3fc26112c79c75605John McCall // Emit the initializer function if necessary. 13383030eb82593097502469a8b3fc26112c79c75605John McCall if (NonConstInit) 13393030eb82593097502469a8b3fc26112c79c75605John McCall EmitCXXGlobalVarDeclInitFunc(D, GV); 13403030eb82593097502469a8b3fc26112c79c75605John McCall 1341354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // Emit global variable debug information. 1342aa11289f754d220c9c155b68a4f84cdcfcefef6aDevang Patel if (CGDebugInfo *DI = getModuleDebugInfo()) { 1343354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->setLocation(D->getLocation()); 1344354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->EmitGlobalVariable(GV, D); 1345354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian } 1346354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian} 1347354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1348354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanianllvm::GlobalValue::LinkageTypes 1349354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz JahanianCodeGenModule::GetLLVMLinkageVarDefinition(const VarDecl *D, 1350354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalVariable *GV) { 135190e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); 1352a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 1353354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::InternalLinkage; 135440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1355354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLImportLinkage; 135640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1357354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLExportLinkage; 1358e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1359e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1360354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 1361e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1362354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 13638f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor } else if (Linkage == GVA_TemplateInstantiation || 13648f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor Linkage == GVA_ExplicitTemplateInstantiation) 136599ace16bc6962f1fc3dc45bbbdf2eb74e555a8adJohn McCall return llvm::GlobalVariable::WeakODRLinkage; 1366a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher else if (!getLangOptions().CPlusPlus && 1367a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher ((!CodeGenOpts.NoCommon && !D->getAttr<NoCommonAttr>()) || 1368a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher D->getAttr<CommonAttr>()) && 1369309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 1370ab27d6ea7b4ce2762a16905281de796db32bb6f2Fariborz Jahanian !D->getAttr<SectionAttr>() && !D->isThreadSpecified() && 1371ab27d6ea7b4ce2762a16905281de796db32bb6f2Fariborz Jahanian !D->getAttr<WeakImportAttr>()) { 137291f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher // Thread local vars aren't considered common linkage. 1373354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::CommonLinkage; 1374686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 1375354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::ExternalLinkage; 137688a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 13775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1378bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1379bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1380bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1381bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1382bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1383bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1384bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1385bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1386bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1387bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1388bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1389bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1390bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1391bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 13921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13932acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *NewRetTy = NewFn->getReturnType(); 1394bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 1395bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1396bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1397dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer UI != E; ) { 1398bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 1399dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::Value::use_iterator I = UI++; // Increment before the CI is erased. 1400dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*I); 14018670cd3ea4dfbf86caacd270ec2441e9949bbb6aGabor Greif if (!CI) continue; // FIXME: when we allow Invoke, just do CallSite CS(*I) 140235db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif llvm::CallSite CS(CI); 1403dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer if (!CI || !CS.isCallee(I)) continue; 14041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1405bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1406bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1407bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1408bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1409bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1410bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1411bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1412bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1413bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1414bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1415bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1416bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 141735db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif if (CS.arg_size() == ArgNo || 141835db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif CS.getArgument(ArgNo)->getType() != AI->getType()) { 1419bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1420bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1421bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1422bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1423bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1424bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 14251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1426bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1427bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 14286ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif ArgList.append(CS.arg_begin(), CS.arg_begin() + ArgNo); 14294c7d9f1507d0f102bd4133bba63348636facd469Jay Foad llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList, "", CI); 1430bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1431ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1432bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 1433bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 1434ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1435bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1436bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 143700549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 143800549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 14393b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1440c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner // Copy debug location attached to CI. 1441c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner if (!CI->getDebugLoc().isUnknown()) 1442c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner NewCall->setDebugLoc(CI->getDebugLoc()); 1443bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1444bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1445bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1446bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1447bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1448b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 1449b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 1450d26bc76c98006609002d9930f8840490e88ac5b5John McCall 14511f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall // Compute the function info and LLVM type. 1452d26bc76c98006609002d9930f8840490e88ac5b5John McCall const CGFunctionInfo &FI = getTypes().getFunctionInfo(GD); 14531f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall bool variadic = false; 14541f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall if (const FunctionProtoType *fpt = D->getType()->getAs<FunctionProtoType>()) 14551f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall variadic = fpt->isVariadic(); 14562acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *Ty = getTypes().GetFunctionType(FI, variadic); 1457d26bc76c98006609002d9930f8840490e88ac5b5John McCall 14589fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1459b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 14601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14610558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 14620558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 14630558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 14640558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 14650558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 14661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14680558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1469bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 14701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 147142745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1472bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 14730558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 147434809507232bc4c3c4840c7d092c7440219fddafChris Lattner 147562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 147662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 147762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 147862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 147962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 148062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 1481f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // (e.g. "int f(int x)"). Move the old function aside so that it 1482f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // doesn't interfere with GetAddrOfFunction. 1483f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall OldFn->setName(llvm::StringRef()); 1484b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 14851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1486bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1487bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1488bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 14899fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1490bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 14919fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 14929fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 14931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 149462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1495bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 14961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 14973c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1498bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1499bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 15001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 150162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1502bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 15031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15040558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1505bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 15061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1507112c967bd5c862a0f5d7913aa06700c048807db8John McCall // We need to set linkage and visibility on the function before 1508112c967bd5c862a0f5d7913aa06700c048807db8John McCall // generating code for it because various parts of IR generation 1509112c967bd5c862a0f5d7913aa06700c048807db8John McCall // want to propagate this information down (e.g. to local static 1510112c967bd5c862a0f5d7913aa06700c048807db8John McCall // declarations). 15110558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 15128b2423361648c39a7d8a3c5e8129e12006deac32John McCall setFunctionLinkage(D, Fn); 1513bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1514112c967bd5c862a0f5d7913aa06700c048807db8John McCall // FIXME: this is redundant with part of SetFunctionDefinitionAttributes 15150ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(Fn, D); 1516112c967bd5c862a0f5d7913aa06700c048807db8John McCall 1517d26bc76c98006609002d9930f8840490e88ac5b5John McCall CodeGenFunction(*this).GenerateCode(D, Fn, FI); 15186379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 15197c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 15207c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 15211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 152240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1523219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 152440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1525219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1526bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1527bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1528f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallvoid CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { 1529f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 153040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1531bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1532bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 15339a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 1534f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1535f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // If there is a definition in the module, then it wins over the alias. 1536f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // This is dubious, but allow it to be safe. Just ignore the alias. 1537f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 1538f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (Entry && !Entry->isDeclaration()) 1539f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return; 15401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15412acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1542bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1543bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1544bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1545bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1546bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 15471faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 15481faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 1549bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1550f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 155196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1552bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1553bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 15541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1555bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1556bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1557bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 15581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1559bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1560f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(Entry->isDeclaration()); 1561f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1562bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1563bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1564bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1565bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1566bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1567bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1568bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1569f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GA->takeName(Entry); 15701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15713c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1572bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1573bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1574f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall } else { 15759a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson GA->setName(MangledName); 1576bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 15771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15787c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 15797c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 15807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 158140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 15827c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 15837c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 158406a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (FD->hasBody()) 15857c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 15867c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 15877c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 15887c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 15891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 159011e8ce7380856abee188b237c2600272df2ed09dRafael Espindola D->hasAttr<WeakRefAttr>() || 15910a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor D->isWeakImported()) { 15927c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 15937c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 15947c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 15957c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1596bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1597bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1598b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1599b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 160034771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbarllvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, 160134771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar unsigned BuiltinID) { 16023e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 16031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 16043e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 16051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16063e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 16074fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger llvm::StringRef Name; 16084fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger GlobalDecl D(FD); 16094fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger 16104fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger // If the builtin has been declared explicitly with an assembler label, 16114fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger // use the mangled name. This differs from the plain label on platforms 16124fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger // that prefix labels. 161362c296e1bd7581a444c2dc7ddb76f0bf2f364f23Joerg Sonnenberger if (FD->hasAttr<AsmLabelAttr>()) 16144fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger Name = getMangledName(D); 16154fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger else if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 16164fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger Name = Context.BuiltinInfo.GetName(BuiltinID) + 10; 16174fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger else 16184fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger Name = Context.BuiltinInfo.GetName(BuiltinID); 16194fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger 16201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16212acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *Ty = 1622386ca78d0b03b1fb519e60d1a14cd12a220364a6Eli Friedman cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); 1623bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 16244fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger return GetOrCreateLLVMFunction(Name, Ty, D, /*ForVTable=*/false); 1625bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1626bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 16278dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID, 16288dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramer llvm::ArrayRef<llvm::Type*> Tys) { 1629df983a8bcbbcea911b8dce283f044787df119d50Jay Foad return llvm::Intrinsic::getDeclaration(&getModule(), (llvm::Intrinsic::ID)IID, 16308dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramer Tys); 16317acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1632bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 16331d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 16341d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 16351d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 163670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 16371d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 16381d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 16392f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer llvm::StringRef String = Literal->getString(); 16402f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer unsigned NumBytes = String.size(); 16411d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1642f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1643f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1644f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 16452f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer return Map.GetOrCreateValue(String); 1646f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1647f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 16481d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 16491d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); 16502f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer const UTF8 *FromPtr = (UTF8 *)String.data(); 16511d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 16521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1653e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian (void)ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 1654e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian &ToPtr, ToPtr + NumBytes, 1655e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian strictConversion); 16561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 165770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 16581d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 165970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 166070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 166170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 166270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 166370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 166470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 166570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 166670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 166770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 166870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 166970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 167070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 167170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 167270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 167370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 167470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 167570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1676434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1677434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1678434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 167970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 16801d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 168170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); 16821d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 16831d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1684cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanianstatic llvm::StringMapEntry<llvm::Constant*> & 1685cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz JahanianGetConstantStringEntry(llvm::StringMap<llvm::Constant*> &Map, 1686cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian const StringLiteral *Literal, 1687cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian unsigned &StringLength) 1688cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian{ 1689cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian llvm::StringRef String = Literal->getString(); 1690cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian StringLength = String.size(); 1691cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian return Map.GetOrCreateValue(String); 1692cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian} 1693cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian 16941d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 16951d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 16961d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 16971d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 16981d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 16991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 170070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 170170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 17021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17031d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 17041d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 17051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17060032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 17070032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 17083e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 17091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17109d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1711c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 17122acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 171396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 17141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 17159d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 17163e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 17173e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 17183c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1719c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 17201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1721e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 17223e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 17232acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::StructType *STy = 1724e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1725e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 17265add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 172744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1728c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 17295add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 17301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1731c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 17322acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 17331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 17345add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 17355add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1736c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 17370032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1738a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 173995b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1740278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner bool isConstant; 1741a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1742278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 174395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1744278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // Note: -fwritable-strings doesn't make unicode CFStrings writable, but 1745278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // does make plain ascii ones writable. 1746278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = true; 1747a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 1748584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // FIXME: With OS X ld 123.2 (xcode 4) and LTO we would get a linker error 1749584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // when using private linkage. It is not clear if this is a bug in ld 1750584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // or a reasonable new restriction. 1751dc0f137295bc7ec5b231ff1842388f149f43c0c8Rafael Espindola Linkage = llvm::GlobalValue::LinkerPrivateLinkage; 1752278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = !Features.WritableStrings; 1753a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1754278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 17551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 1756278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 1757278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner ".str"); 1758b266a1fce09ab4ee7033268199509aacfbef056aRafael Espindola GV->setUnnamedAddr(true); 1759a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 17604da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 17614da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck GV->setAlignment(Align.getQuantity()); 1762f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar } else { 1763f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar CharUnits Align = getContext().getTypeAlignInChars(getContext().CharTy); 1764f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar GV->setAlignment(Align.getQuantity()); 1765a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 17665add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 17675add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1768c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1769c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 17705add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 17711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1772c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 177308e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 17741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 17751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 177695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 17778e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 17788e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 17791d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 17801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17810c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1782c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 178345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 178433e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanianllvm::Constant * 17854c73307c74764ba99e1379677fe92af72f676531Fariborz JahanianCodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) { 17862bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian unsigned StringLength = 0; 17872bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::StringMapEntry<llvm::Constant*> &Entry = 1788cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian GetConstantStringEntry(CFConstantStringMap, Literal, StringLength); 17892bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17902bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (llvm::Constant *C = Entry.getValue()) 17912bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return C; 17922bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17932bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zero = 17942bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 17952bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zeros[] = { Zero, Zero }; 17962bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 1797ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian // If we don't already have it, get _NSConstantStringClassReference. 17984c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (!ConstantStringClassRef) { 17994c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string StringClass(getLangOptions().ObjCConstantStringClass); 18002acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 18014c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::Constant *GV; 18026f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian if (Features.ObjCNonFragileABI) { 180325dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian std::string str = 180425dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian StringClass.empty() ? "OBJC_CLASS_$_NSConstantString" 180525dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian : "OBJC_CLASS_$_" + StringClass; 18066f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian GV = getObjCRuntime().GetClassGlobal(str); 18076f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian // Make sure the result is of the correct type. 18082acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 18096f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian ConstantStringClassRef = 18106f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian llvm::ConstantExpr::getBitCast(GV, PTy); 18116f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian } else { 181225dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian std::string str = 181325dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian StringClass.empty() ? "_NSConstantStringClassReference" 181425dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian : "_" + StringClass + "ClassReference"; 18152acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *PTy = llvm::ArrayType::get(Ty, 0); 181625dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian GV = CreateRuntimeVariable(PTy, str); 18176f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian // Decay array -> ptr 18186f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian ConstantStringClassRef = 18196f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 18204c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian } 18212bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 18222bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18232bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian QualType NSTy = getContext().getNSConstantStringType(); 18242bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18252acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::StructType *STy = 18262bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian cast<llvm::StructType>(getTypes().ConvertType(NSTy)); 18272bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18282bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian std::vector<llvm::Constant*> Fields(3); 18292bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18302bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Class pointer. 18314c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Fields[0] = ConstantStringClassRef; 18322bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18332bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String pointer. 18342bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 18352bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18362bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage; 18372bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isConstant; 1838cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian Linkage = llvm::GlobalValue::PrivateLinkage; 1839cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian isConstant = !Features.WritableStrings; 18402bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18412bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable *GV = 18422bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 18432bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian ".str"); 1844803d307a5385059b1a84dfe9706ab158c80a20dcRafael Espindola GV->setUnnamedAddr(true); 1845cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian CharUnits Align = getContext().getTypeAlignInChars(getContext().CharTy); 1846cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian GV->setAlignment(Align.getQuantity()); 18472bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 18482bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18492bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String length. 18502acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 18512bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[2] = llvm::ConstantInt::get(Ty, StringLength); 18522bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18532bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // The struct. 18542bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian C = llvm::ConstantStruct::get(STy, Fields); 18552bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 18562bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable::PrivateLinkage, C, 18572bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian "_unnamed_nsstring_"); 18582bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME. Fix section. 1859ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian if (const char *Sect = 1860ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian Features.ObjCNonFragileABI 1861ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian ? getContext().Target.getNSStringNonFragileABISection() 1862ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian : getContext().Target.getNSStringSection()) 18632bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setSection(Sect); 18642bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Entry.setValue(GV); 18652bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18662bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return GV; 186733e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian} 186833e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian 18696143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 18701e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 18716143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 18723b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck const ASTContext &Context = getContext(); 18731e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 18743b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck Context.getAsConstantArrayType(E->getType()); 18751e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 18761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1877dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 18781e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 18791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1880dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 18813b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck RealLen *= Context.Target.getWCharWidth() / Context.getCharWidth(); 18821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18832f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer std::string Str = E->getString().str(); 18841e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 18851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18861e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 18871e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 18881e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 18896143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 18906143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 18916143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 18926143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 18936143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 18947eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 18957eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); 18967eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman if (S->isWide()) { 18977eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Type *DestTy = 18987eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); 18997eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman C = llvm::ConstantExpr::getBitCast(C, DestTy); 19007eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 19017eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman return C; 19026143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 19036143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1904eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1905eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1906eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1907eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1908eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1909eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1910a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1911a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1912eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1913eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1914eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1915a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 19169de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramerstatic llvm::Constant *GenerateStringLiteral(llvm::StringRef str, 191745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 19185fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 19195fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 19206143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 19210032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 19220032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 19231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 192445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 19251257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalVariable *GV = 19261257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 19271257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalValue::PrivateLinkage, 19281257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola C, GlobalName); 1929b0dd6702ab5e7f53a4bdab5a3371285ad2a4b20bEli Friedman GV->setAlignment(1); 19301257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola GV->setUnnamedAddr(true); 19311257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola return GV; 193245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 193345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 19346143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 19356143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 19366143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 19376143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 19386143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 19396143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 19406143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 19416143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 19429de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramerllvm::Constant *CodeGenModule::GetAddrOfConstantString(llvm::StringRef Str, 19435fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 19448e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 19458e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 19468e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 19478e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 194895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 19498e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 19508e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 19518e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 19529de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer return GenerateStringLiteral(Str, false, *this, GlobalName); 19531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StringMapEntry<llvm::Constant *> &Entry = 19559de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer ConstantStringMap.GetOrCreateValue(Str); 195645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 195745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1958eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 195945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 196045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 19619de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer llvm::Constant *C = GenerateStringLiteral(Str, true, *this, GlobalName); 196245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 196345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 196445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 19656143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 19666143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 19679de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer/// array containing the literal and a terminating '\0' 19686143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 19699de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramerllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &Str, 19705fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 19719de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer llvm::StringRef StrWithNull(Str.c_str(), Str.size() + 1); 19729de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer return GetAddrOfConstantString(StrWithNull, GlobalName); 19736143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 197441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1975af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1976af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 19771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 1978af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 19791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 198017945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 1981af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 19821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1983af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1984af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1985af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1986af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1987af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1988af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1989af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1990af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1991af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 199217945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 1993fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1994fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1995af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 199617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 1997fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1998fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1999af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 2000af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 2001af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 2002af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 2003e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCallstatic bool needsDestructMethod(ObjCImplementationDecl *impl) { 2004e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCInterfaceDecl *iface 2005e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall = const_cast<ObjCInterfaceDecl*>(impl->getClassInterface()); 2006e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall for (ObjCIvarDecl *ivar = iface->all_declared_ivar_begin(); 2007e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ivar; ivar = ivar->getNextIvar()) 2008e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall if (ivar->getType().isDestructedType()) 2009e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall return true; 2010e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 2011e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall return false; 2012e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall} 2013e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 2014109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// EmitObjCIvarInitializations - Emit information for ivar initialization 2015109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// for an implementation. 2016109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanianvoid CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { 2017e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // We might need a .cxx_destruct even if we don't have any ivar initializers. 2018e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall if (needsDestructMethod(D)) { 2019e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); 2020e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 2021e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCMethodDecl *DTORMethod = 2022e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCMethodDecl::Create(getContext(), D->getLocation(), D->getLocation(), 2023e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall cxxSelector, getContext().VoidTy, 0, D, true, 2024e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall false, true, false, ObjCMethodDecl::Required); 2025e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall D->addInstanceMethod(DTORMethod); 2026e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); 2027f85e193739c953358c865005855253af4f68a497John McCall D->setHasCXXStructors(true); 2028e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall } 2029e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 2030e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // If the implementation doesn't have any ivar initializers, we don't need 2031e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // a .cxx_construct. 2032827bbcc8a9115782693b21030a45378abe5c1862David Chisnall if (D->getNumIvarInitializers() == 0) 2033109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian return; 2034109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 2035e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall IdentifierInfo *II = &getContext().Idents.get(".cxx_construct"); 2036e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 2037109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian // The constructor returns 'self'. 2038109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), 2039109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 2040109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 2041109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().getObjCIdType(), 0, 2042e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall D, true, false, true, false, 2043109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 2044109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(CTORMethod); 2045109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); 2046f85e193739c953358c865005855253af4f68a497John McCall D->setHasCXXStructors(true); 2047109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian} 2048109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 204991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 2050984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 205117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 2052984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 2053984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 2054984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 2055984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 205691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 205791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 2058f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 2059f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 206091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 206191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 206291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 206391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 206417945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 206591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 206691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 206791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 206891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 206941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 207041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 207141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 207241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 207341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 207441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 207541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 207641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 207716e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 207816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 207916e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 20801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 208141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 2082293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 20832b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 208441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 208516e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 20868387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() || 20878387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet cast<FunctionDecl>(D)->isLateTemplateParsed()) 208816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 20891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2090555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 2091555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 2092555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 209341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 2094555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 209541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 209641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 209726fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall // Indirect fields from global anonymous structs and unions can be 209826fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall // ignored; only the actual variable requires IR gen support. 209926fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall case Decl::IndirectField: 210026fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall break; 210126fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall 210295d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 210341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 2104984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 210541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 21069cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 21079d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 21089cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 2109dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 2110127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 2111127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 21123e4c6c4c79a03f5cb0c4671d7c282d623c6dc35eRichard Smith case Decl::TypeAliasTemplate: 2113018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 21146a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor case Decl::Block: 21159cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 211695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 21171fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 21188387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() || 21198387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet cast<FunctionDecl>(D)->isLateTemplateParsed()) 21201fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 21211fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 212295d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 212395d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 212427ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 21258387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->isLateTemplateParsed()) 21268387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet return; 212727ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 212827ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 212936674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 213036674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 213136674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 213236674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 213336674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 213495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 21351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 213638e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 213741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 213841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 2139b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 214041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 2141000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 2142baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner case Decl::ObjCCategory: { 2143baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D); 2144baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner if (CD->IsClassExtension() && CD->hasSynthBitfield()) 2145baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner Context.ResetObjCLayout(CD->getClassInterface()); 2146baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner break; 2147baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner } 2148285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 214941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 2150b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 215141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 215241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 215341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 2154af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 2155af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 215641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 215741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 215841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 2159af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 2160af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 2161000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (Features.ObjCNonFragileABI2 && OMD->hasSynthBitfield()) 2162000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(OMD->getClassInterface()); 2163af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 2164109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian EmitObjCIvarInitializations(OMD); 2165af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 216641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 21671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 216841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 216941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 217041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 21716fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 217241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 217341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 217441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 21751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 2176305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 217741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 217841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 217991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 218091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 218141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 218241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 218341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 218441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 21858d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer llvm::StringRef AsmString = AD->getAsmString()->getString(); 21861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 218741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 218841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 218941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 219041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 21918d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 219241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 219341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 21941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 21951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 2196f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 2197f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 2198f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 219941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 220041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 220141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 2202744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2203744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Turns the given pointer into a constant. 2204744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, 2205744016dde06fcffd50931e94a98c850f8b12cd87John McCall const void *Ptr) { 2206744016dde06fcffd50931e94a98c850f8b12cd87John McCall uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); 22072acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *i64 = llvm::Type::getInt64Ty(Context); 2208744016dde06fcffd50931e94a98c850f8b12cd87John McCall return llvm::ConstantInt::get(i64, PtrInt); 2209744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2210744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2211744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic void EmitGlobalDeclMetadata(CodeGenModule &CGM, 2212744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *&GlobalMetadata, 2213744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl D, 2214744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr) { 2215744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (!GlobalMetadata) 2216744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata = 2217744016dde06fcffd50931e94a98c850f8b12cd87John McCall CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); 2218744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2219744016dde06fcffd50931e94a98c850f8b12cd87John McCall // TODO: should we report variant information for ctors/dtors? 2220744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Ops[] = { 2221744016dde06fcffd50931e94a98c850f8b12cd87John McCall Addr, 2222744016dde06fcffd50931e94a98c850f8b12cd87John McCall GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) 2223744016dde06fcffd50931e94a98c850f8b12cd87John McCall }; 22246f141659cab11109d9931d92d0988f8850778de3Jay Foad GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops)); 2225744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2226744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2227744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes associating all the global values in the 2228744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// current module with the Decls they came from. This is useful for 2229744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// projects using IR gen as a subroutine. 2230744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// 2231744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Since there's currently no way to associate an MDNode directly 2232744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with an llvm::GlobalValue, we create a global named metadata 2233744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with the name 'clang.global.decl.ptrs'. 2234744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenModule::EmitDeclMetadata() { 2235744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2236744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2237744016dde06fcffd50931e94a98c850f8b12cd87John McCall // StaticLocalDeclMap 2238744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<GlobalDecl,llvm::StringRef>::iterator 2239744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = MangledDeclNames.begin(), E = MangledDeclNames.end(); 2240744016dde06fcffd50931e94a98c850f8b12cd87John McCall I != E; ++I) { 2241744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); 2242744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); 2243744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2244744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2245744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2246744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes for all the local variables in the current 2247744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// function. 2248744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenFunction::EmitDeclMetadata() { 2249744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (LocalDeclMap.empty()) return; 2250744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2251744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::LLVMContext &Context = getLLVMContext(); 2252744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2253744016dde06fcffd50931e94a98c850f8b12cd87John McCall // Find the unique metadata ID for this name. 2254744016dde06fcffd50931e94a98c850f8b12cd87John McCall unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); 2255744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2256744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2257744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2258744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator 2259744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { 2260744016dde06fcffd50931e94a98c850f8b12cd87John McCall const Decl *D = I->first; 2261744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Addr = I->second; 2262744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2263744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { 2264744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); 22656f141659cab11109d9931d92d0988f8850778de3Jay Foad Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, DAddr)); 2266744016dde06fcffd50931e94a98c850f8b12cd87John McCall } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { 2267744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); 2268744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); 2269744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2270744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2271744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2272673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 22733dc05418538c719fea48b906bfa4febe5296e126Nick Lewyckyvoid CodeGenModule::EmitCoverageFile() { 22743dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky if (!getCodeGenOpts().CoverageFile.empty()) { 22755ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky if (llvm::NamedMDNode *CUNode = TheModule.getNamedMetadata("llvm.dbg.cu")) { 22765ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::NamedMDNode *GCov = TheModule.getOrInsertNamedMetadata("llvm.gcov"); 22775ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::LLVMContext &Ctx = TheModule.getContext(); 22783dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::MDString *CoverageFile = 22793dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::MDString::get(Ctx, getCodeGenOpts().CoverageFile); 22805ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky for (int i = 0, e = CUNode->getNumOperands(); i != e; ++i) { 22815ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::MDNode *CU = CUNode->getOperand(i); 22823dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::Value *node[] = { CoverageFile, CU }; 22835ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::MDNode *N = llvm::MDNode::get(Ctx, node); 22845ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky GCov->addOperand(N); 22855ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 22865ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 22875ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 22885ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky} 22895ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky 2290673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@name Custom Runtime Function Interfaces 2291673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@{ 2292673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// 2293673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// FIXME: These can be eliminated once we can have clients just get the required 2294673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// AST nodes from the builtin tables. 2295673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2296673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectDispose() { 2297673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectDispose) 2298673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose; 2299673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2300754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2301754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectDisposeDecl) { 2302754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectDispose = GetAddrOfFunction( 2303754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl, 2304754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectDisposeDecl)); 2305754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2306754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2307754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2308df983a8bcbbcea911b8dce283f044787df119d50Jay Foad llvm::Type *args[] = { Int8PtrTy, Int32Ty }; 23092acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *fty 23100774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall = llvm::FunctionType::get(VoidTy, args, false); 2311673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose = 23120774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall CreateRuntimeFunction(fty, "_Block_object_dispose"); 2313673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2314673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2315673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectAssign() { 2316673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectAssign) 2317673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign; 2318673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2319754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2320754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectAssignDecl) { 2321754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectAssign = GetAddrOfFunction( 2322754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl, 2323754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectAssignDecl)); 2324754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2325754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2326754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2327df983a8bcbbcea911b8dce283f044787df119d50Jay Foad llvm::Type *args[] = { Int8PtrTy, Int8PtrTy, Int32Ty }; 23282acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *fty 23290774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall = llvm::FunctionType::get(VoidTy, args, false); 2330673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign = 23310774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall CreateRuntimeFunction(fty, "_Block_object_assign"); 2332673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2333673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2334673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteGlobalBlock() { 2335673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteGlobalBlock) 2336673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteGlobalBlock; 2337754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2338754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2339754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteGlobalBlockDecl) { 2340754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteGlobalBlock = GetAddrOfGlobalVar( 2341754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl, 2342754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteGlobalBlockDecl->getType())); 2343754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2344754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2345754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2346d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall return NSConcreteGlobalBlock = 2347d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall CreateRuntimeVariable(Int8PtrTy, "_NSConcreteGlobalBlock"); 2348673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2349673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2350673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteStackBlock() { 2351673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteStackBlock) 2352673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteStackBlock; 2353754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2354754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2355754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteStackBlockDecl) { 2356754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteStackBlock = GetAddrOfGlobalVar( 2357754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl, 2358754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteStackBlockDecl->getType())); 2359754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2360754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2361754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2362d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall return NSConcreteStackBlock = 2363d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall CreateRuntimeVariable(Int8PtrTy, "_NSConcreteStackBlock"); 2364673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2365673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2366673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@} 2367