CodeGenModule.cpp revision 0774cb84719f2aea3016493a2bbd9a02aa3e0541
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)), 65f16aa103d3afd42fbca2ab346f191bf745cec092John McCall Types(C, M, TD, getTargetCodeGenInfo().getABIInfo(), ABI), 663d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman TBAA(0), 67e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky VTables(*this), Runtime(0), DebugInfo(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 915936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall // Initialize the type cache. 925936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall llvm::LLVMContext &LLVMContext = M.getContext(); 930774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall VoidTy = llvm::Type::getVoidTy(LLVMContext); 940774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int8Ty = llvm::Type::getInt8Ty(LLVMContext); 950774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int32Ty = llvm::Type::getInt32Ty(LLVMContext); 960774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int64Ty = llvm::Type::getInt64Ty(LLVMContext); 975936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall PointerWidthInBits = C.Target.getPointerWidth(0); 9834695856c0e67b3765b46304cc71b5d2cd5b71c7John McCall PointerAlignInBytes = 9934695856c0e67b3765b46304cc71b5d2cd5b71c7John McCall C.toCharUnitsFromBits(C.Target.getPointerAlign(0)).getQuantity(); 1005936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall IntTy = llvm::IntegerType::get(LLVMContext, C.Target.getIntWidth()); 1015936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall IntPtrTy = llvm::IntegerType::get(LLVMContext, PointerWidthInBits); 1025936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8PtrTy = Int8Ty->getPointerTo(0); 1035936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8PtrPtrTy = Int8PtrTy->getPointerTo(0); 1042b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 1052b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 1062b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 107815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 108f16aa103d3afd42fbca2ab346f191bf745cec092John McCall delete &ABI; 1094376c85fb0ac9e7fd779d246efc77e1169179138Dan Gohman delete TBAA; 110815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 111815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 112815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 1130d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnallvoid CodeGenModule::createObjCRuntime() { 1140d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall if (!Features.NeXTRuntime) 1150d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateGNUObjCRuntime(*this); 1160d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else 1170d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateMacObjCRuntime(*this); 1180d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall} 1190d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall 120815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 12182227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 1226c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalInitFunc(); 123efb0fa9e11f75af51744a6159530ef7cc8efa24aDaniel Dunbar EmitCXXGlobalDtorFunc(); 124208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 125208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 126208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 1276bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 1286bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 129532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 1300269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 131744016dde06fcffd50931e94a98c850f8b12cd87John McCall 132b25938303de0976b9f189363d43033e5788e3d36John McCall SimplifyPersonality(); 133b25938303de0976b9f189363d43033e5788e3d36John McCall 134744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (getCodeGenOpts().EmitDeclMetadata) 135744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitDeclMetadata(); 1365ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky 1375ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky if (getCodeGenOpts().EmitGcovArcs || getCodeGenOpts().EmitGcovNotes) 1383dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky EmitCoverageFile(); 139f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 140f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 141e80d56771736c85fd8365c394a6731923b17e91dDevang Patelvoid CodeGenModule::UpdateCompletedType(const TagDecl *TD) { 142e80d56771736c85fd8365c394a6731923b17e91dDevang Patel // Make sure that this type is translated. 143e80d56771736c85fd8365c394a6731923b17e91dDevang Patel Types.UpdateCompletedType(TD); 144e80d56771736c85fd8365c394a6731923b17e91dDevang Patel if (DebugInfo) 145e80d56771736c85fd8365c394a6731923b17e91dDevang Patel DebugInfo->UpdateCompletedType(TD); 146e80d56771736c85fd8365c394a6731923b17e91dDevang Patel} 147e80d56771736c85fd8365c394a6731923b17e91dDevang Patel 1483d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanllvm::MDNode *CodeGenModule::getTBAAInfo(QualType QTy) { 1493d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!TBAA) 1503d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return 0; 1513d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return TBAA->getTBAAInfo(QTy); 1523d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1533d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1543d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanvoid CodeGenModule::DecorateInstruction(llvm::Instruction *Inst, 1553d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman llvm::MDNode *TBAAInfo) { 1563d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman Inst->setMetadata(llvm::LLVMContext::MD_tbaa, TBAAInfo); 1573d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1583d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1596374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCallbool CodeGenModule::isTargetDarwin() const { 160db57a4cdb0a6abf3239f3a794a900ce312c5887bDaniel Dunbar return getContext().Target.getTriple().isOSDarwin(); 1616374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall} 1626374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 16332096695c76033a6b0b1747c439f7378a11e8312John McCallvoid CodeGenModule::Error(SourceLocation loc, llvm::StringRef error) { 16432096695c76033a6b0b1747c439f7378a11e8312John McCall unsigned diagID = getDiags().getCustomDiagID(Diagnostic::Error, error); 16532096695c76033a6b0b1747c439f7378a11e8312John McCall getDiags().Report(Context.getFullLoc(loc), diagID); 16632096695c76033a6b0b1747c439f7378a11e8312John McCall} 16732096695c76033a6b0b1747c439f7378a11e8312John McCall 168488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 1692c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 17090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 17190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 17290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 17390df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 17556b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 1762c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 1770a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 1780a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 1792c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 18058c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 181488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 182c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 18390df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 18490df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 18590df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 18690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 18856b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 189c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 1900a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 191c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 192c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 1931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 1940ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson const NamedDecl *D) const { 19504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 196df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 1977e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 1986ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 1997e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 2006ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 201af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility for definitions. 202af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 203071d3af0de273b1079d79f7f979264f28d567373Rafael Espindola if (LV.visibilityExplicit() || !GV->hasAvailableExternallyLinkage()) 204071d3af0de273b1079d79f7f979264f28d567373Rafael Espindola GV->setVisibility(GetLLVMVisibility(LV.visibility())); 2057cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 2067cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 207cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// Set the symbol visibility of type information (vtable and RTTI) 208cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// associated with the given type. 209cbfe50224b19119e759802bd0c1463269dffd09eJohn McCallvoid CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV, 210cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall const CXXRecordDecl *RD, 211fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson TypeVisibilityKind TVK) const { 2120ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(GV, RD); 213cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 214279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakVTables) 215279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall return; 216279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall 2179a86a137b0872bad25161fb3408a71d919638757Anders Carlsson // We never want to drop the visibility for RTTI names. 2189a86a137b0872bad25161fb3408a71d919638757Anders Carlsson if (TVK == TVK_ForRTTIName) 2199a86a137b0872bad25161fb3408a71d919638757Anders Carlsson return; 2209a86a137b0872bad25161fb3408a71d919638757Anders Carlsson 221cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We want to drop the visibility to hidden for weak type symbols. 222cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // This isn't possible if there might be unresolved references 223cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // elsewhere that rely on this symbol being visible. 224cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2257a536907da776bdc47a704e7cafd641e8150e653John McCall // This should be kept roughly in sync with setThunkVisibility 2267a536907da776bdc47a704e7cafd641e8150e653John McCall // in CGVTables.cpp. 2277a536907da776bdc47a704e7cafd641e8150e653John McCall 228cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Preconditions. 229f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson if (GV->getLinkage() != llvm::GlobalVariable::LinkOnceODRLinkage || 230cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->getVisibility() != llvm::GlobalVariable::DefaultVisibility) 231cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 232cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 233cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Don't override an explicit visibility attribute. 2344421d2b341d041df44013769f23c306308bbab83Douglas Gregor if (RD->getExplicitVisibility()) 235cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 236cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 237cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall switch (RD->getTemplateSpecializationKind()) { 238cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We have to disable the optimization if this is an EI definition 239cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // because there might be EI declarations in other shared objects. 240cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDefinition: 241cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDeclaration: 242cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 243cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2447a536907da776bdc47a704e7cafd641e8150e653John McCall // Every use of a non-template class's type information has to emit it. 245cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_Undeclared: 246cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 247cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2487a536907da776bdc47a704e7cafd641e8150e653John McCall // In theory, implicit instantiations can ignore the possibility of 2497a536907da776bdc47a704e7cafd641e8150e653John McCall // an explicit instantiation declaration because there necessarily 2507a536907da776bdc47a704e7cafd641e8150e653John McCall // must be an EI definition somewhere with default visibility. In 2517a536907da776bdc47a704e7cafd641e8150e653John McCall // practice, it's possible to have an explicit instantiation for 2527a536907da776bdc47a704e7cafd641e8150e653John McCall // an arbitrary template class, and linkers aren't necessarily able 2537a536907da776bdc47a704e7cafd641e8150e653John McCall // to deal with mixed-visibility symbols. 2547a536907da776bdc47a704e7cafd641e8150e653John McCall case TSK_ExplicitSpecialization: 255cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ImplicitInstantiation: 256279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakTemplateVTables) 2577a536907da776bdc47a704e7cafd641e8150e653John McCall return; 258cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 259cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall } 260cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 261cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // If there's a key function, there may be translation units 262cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // that don't have the key function's definition. But ignore 263cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // this if we're emitting RTTI under -fno-rtti. 264fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson if (!(TVK != TVK_ForRTTI) || Features.RTTI) { 265cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (Context.getKeyFunction(RD)) 266cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 267fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson } 268cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 269cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Otherwise, drop the visibility to hidden. 270cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 271b1c65ff108de47a89585ad37874bd6cb232664cdRafael Espindola GV->setUnnamedAddr(true); 272cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall} 273cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 274793a990774826a0c20b0da66cec0991badfb8b63Anders Carlssonllvm::StringRef CodeGenModule::getMangledName(GlobalDecl GD) { 275793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 276793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 277793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; 278793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (!Str.empty()) 279793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 280793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 2814c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall if (!getCXXABI().getMangleContext().shouldMangleDeclName(ND)) { 282793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson IdentifierInfo *II = ND->getIdentifier(); 283793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson assert(II && "Attempt to mangle unnamed decl."); 284793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 285793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = II->getName(); 286793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 287793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson } 288793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 289793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::SmallString<256> Buffer; 290c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola llvm::raw_svector_ostream Out(Buffer); 291793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 292c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Out); 293793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 294c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Out); 295793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const BlockDecl *BD = dyn_cast<BlockDecl>(ND)) 296c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleBlock(BD, Out); 297793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else 298c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleName(ND, Out); 299793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 300793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson // Allocate space for the mangled name. 301c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola Out.flush(); 302793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson size_t Length = Buffer.size(); 303793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson char *Name = MangledNamesAllocator.Allocate<char>(Length); 304793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson std::copy(Buffer.begin(), Buffer.end(), Name); 305793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 306793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = llvm::StringRef(Name, Length); 307793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 308793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 309793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson} 310793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 31114110477887e3dc168ffc6c191e72d705051f99ePeter Collingbournevoid CodeGenModule::getBlockMangledName(GlobalDecl GD, MangleBuffer &Buffer, 31214110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const BlockDecl *BD) { 31314110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleContext &MangleCtx = getCXXABI().getMangleContext(); 31414110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const Decl *D = GD.getDecl(); 315c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola llvm::raw_svector_ostream Out(Buffer.getBuffer()); 31614110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne if (D == 0) 317c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleGlobalBlock(BD, Out); 31814110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 319c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleCtorBlock(CD, GD.getCtorType(), BD, Out); 32014110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 321c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleDtorBlock(DD, GD.getDtorType(), BD, Out); 32214110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else 323c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleBlock(cast<DeclContext>(D), BD, Out); 3249a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson} 3259a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson 326f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::GlobalValue *CodeGenModule::GetGlobalValue(llvm::StringRef Name) { 327f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return getModule().getNamedValue(Name); 3285f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 3295f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 3306d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 3316d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 3326bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 33349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3346bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 3356d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3366d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 3376bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 3386bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 3396bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 34049988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3416bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 3426bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 3436bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3446bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 3456bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 3460774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall llvm::FunctionType* CtorFTy = llvm::FunctionType::get(VoidTy, false); 34796e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 3486bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3496bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 3501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType* CtorStructTy = 3511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), 35296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 3536bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3546bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 3556bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 3566bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 3576bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 3581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 3590032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 3603c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 36108e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 3626bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 3636bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3646bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 36596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 3661c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 367572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 3687db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 3691c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 3706d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 3716d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3726d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 373532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 374532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 375532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 376532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 377532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 378532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 37996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 380532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 381532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 3821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *gv = 3831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(TheModule, Array->getType(), false, 3841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::AppendingLinkage, Array, 3851c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.global.annotations"); 386532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 387532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 388532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 389d46f98573ba104eda102dd3224b2dca69f1c6336John McCallllvm::GlobalValue::LinkageTypes 390d46f98573ba104eda102dd3224b2dca69f1c6336John McCallCodeGenModule::getFunctionLinkage(const FunctionDecl *D) { 39190e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); 3927c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 393f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_Internal) 394d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::InternalLinkage; 395f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 396f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<DLLExportAttr>()) 397d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::DLLExportLinkage; 398f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 399f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<WeakAttr>()) 400d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::WeakAnyLinkage; 401f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 402f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 403f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition somewhere else, so we can use available_externally linkage. 404f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_C99Inline) 405fd0f89d3d7e4220327abdec1cb115474d70219dcFariborz Jahanian return llvm::Function::AvailableExternallyLinkage; 406f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 407f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C++, the compiler has to emit a definition in every translation unit 408f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // that references the function. We should use linkonce_odr because 409f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // a) if all references in this translation unit are optimized away, we 410f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 411f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 412f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition is dependable. 413f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 414142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext 415142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian ? llvm::Function::LinkOnceODRLinkage 416142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian : llvm::Function::InternalLinkage; 417f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 418f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // An explicit instantiation of a template has weak linkage, since 419f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // explicit instantiations can occur in multiple translation units 420f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // and must all be equivalent. However, we are not allowed to 421f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // throw away these explicit instantiations. 422f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_ExplicitTemplateInstantiation) 423142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext 424142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian ? llvm::Function::WeakODRLinkage 425142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian : llvm::Function::InternalLinkage; 426f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 427f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // Otherwise, we have strong external linkage. 428f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner assert(Linkage == GVA_StrongExternal); 429f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner return llvm::Function::ExternalLinkage; 430d46f98573ba104eda102dd3224b2dca69f1c6336John McCall} 431d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 432d46f98573ba104eda102dd3224b2dca69f1c6336John McCall 433d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// SetFunctionDefinitionAttributes - Set attributes for a global. 434d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// 435d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// FIXME: This is currently only done for aliases and functions, but not for 436d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// variables (these details are set in EmitGlobalVarDefinition for variables). 437d46f98573ba104eda102dd3224b2dca69f1c6336John McCallvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 438d46f98573ba104eda102dd3224b2dca69f1c6336John McCall llvm::GlobalValue *GV) { 4397c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 440d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 441d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 4427dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 4431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 4447dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 445ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 446761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 447ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 448761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 449ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 450ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 451f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 452f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4537c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 4547c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 45574ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 4561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 457af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 45840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<AlwaysInlineAttr>()) 459af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 4601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 461dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar if (D->hasAttr<NakedAttr>()) 462dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar F->addFnAttr(llvm::Attribute::Naked); 463dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar 4641feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 46581ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 466f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 467c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) 468c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola F->setUnnamedAddr(true); 469c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola 470fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson if (Features.getStackProtectorMode() == LangOptions::SSPOn) 471fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 472fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson else if (Features.getStackProtectorMode() == LangOptions::SSPReq) 473fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 474fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 475cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); 476cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt if (alignment) 477cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt F->setAlignment(alignment); 478cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt 479fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 480bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 481bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 482f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 483f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 4857c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 486934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) 487934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson setGlobalVisibility(GV, ND); 4881fb0caaa7bef765b85972274e3b434af2572c141John McCall else 4891fb0caaa7bef765b85972274e3b434af2572c141John McCall GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 4907c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 49140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 4927c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 4937c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 49440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 4957c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 49682d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 49782d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); 4987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 4997c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5000e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 5010e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 5020e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 5030e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 5040e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 5057c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5067c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 5077c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5080e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 509f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 510f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 511b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlssonvoid CodeGenModule::SetFunctionAttributes(GlobalDecl GD, 512c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 513c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 5140ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne if (unsigned IID = F->getIntrinsicID()) { 5150ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne // If this is an intrinsic function, set the function's attributes 5160ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne // to the intrinsic's attributes. 5170ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne F->setAttributes(llvm::Intrinsic::getAttributes((llvm::Intrinsic::ID)IID)); 5180ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne return; 5190ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne } 5200ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne 521b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); 522b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson 523c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 524b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); 5251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5267c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 5277c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 5281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 52940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 5307c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 5311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 5320a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor FD->isWeakImported()) { 5337c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 5341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 5357c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 5367c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 5371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 538af14603ca61757cf4361b583b45639a04c57e651John McCall 539af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = FD->getLinkageAndVisibility(); 540af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() == ExternalLinkage && LV.visibilityExplicit()) { 541af14603ca61757cf4361b583b45639a04c57e651John McCall F->setVisibility(GetLLVMVisibility(LV.visibility())); 542af14603ca61757cf4361b583b45639a04c57e651John McCall } 5437c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 5447c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 54540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 5467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 547219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 548219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 5490269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 5501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 5510269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 55235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 5530269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5540269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5550269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 5560269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 557ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 5580269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 5590269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5603c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 5611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 56235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 56335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 56435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 56535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 5661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 5671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 568a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 56935f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 5701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 571c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 572c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 57396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 5741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 5761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 5770269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 5787db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 5791c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 5800269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5810269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 5820269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5830269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5840269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 58567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 58667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 58767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 588bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 589046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson while (!DeferredDeclsToEmit.empty() || !DeferredVTables.empty()) { 590046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson if (!DeferredVTables.empty()) { 591046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson const CXXRecordDecl *RD = DeferredVTables.back(); 592046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson DeferredVTables.pop_back(); 593046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson getVTables().GenerateClassData(getVTableLinkage(RD), RD); 594bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola continue; 595bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola } 596bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 5972a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 59867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 59967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 600c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // Check to see if we've already emitted this. This is necessary 601c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // for a couple of reasons: first, decls can end up in the 602c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // deferred-decls queue multiple times, and second, decls can end 603c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // up with definitions in unusual ways (e.g. by an extern inline 604c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // function acquiring a strong function redefinition). Just 605c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // ignore these cases. 606c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // 607c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // TODO: That said, looking this up multiple times is very wasteful. 6089a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef Name = getMangledName(D); 609f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *CGRef = GetGlobalValue(Name); 61067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 6111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 61267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 61367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 6141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 615c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // GlobalAlias::isDeclaration() defers to the aliasee, but for our 616c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // purposes an alias counts as a definition. 617c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall if (isa<llvm::GlobalAlias>(CGRef)) 618c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall continue; 619c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall 62067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 62167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 62267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 6235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 6268bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 6271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 6281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// GlobalValue being annotated. The second field is the constant string 6291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// created from the AnnotateAttr's annotation. The third field is a constant 6308bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 6318bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 6328bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6338bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 6348bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 6358bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 6378bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 6388bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 6398bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 6408bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6418bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 6428bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 6433c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); 6441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *anno = llvm::ConstantArray::get(VMContext, 6450032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson AA->getAnnotation(), true); 6460032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *unit = llvm::ConstantArray::get(VMContext, 6470032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson M->getModuleIdentifier(), 6488bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 6498bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6508bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 6518bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 6521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *annoGV = 65395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, anno->getType(), false, 65495b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, anno, 65595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GV->getName()); 6568bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 6578bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 65895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, unit->getType(), false, 6591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::PrivateLinkage, unit, 66095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ".str"); 661d3d4e1ee398748468cbaaddb3b0af5953f043803Rafael Espindola unitGV->setUnnamedAddr(true); 6628bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 66357d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 6648bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 6653c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, SBP), 6663c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(annoGV, SBP), 6673c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(unitGV, SBP), 6680032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) 6698bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 67047a434ff3d49e7906eda88e8e8242e4297725b32Owen Anderson return llvm::ConstantStruct::get(VMContext, Fields, 4, false); 6718bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 6728bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 673a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidisbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 67490e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis // Never defer when EmitAllDecls is specified. 67590e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis if (Features.EmitAllDecls) 676a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidis return false; 6770b6bc8bd7a1d2a7d7478d13d78cff94cacad61fcDouglas Gregor 6784ac7c0bb39696e92fd220118fedc484c09a69870Argyrios Kyrtzidis return !getContext().DeclMustBeEmitted(Global); 67973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 68073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 6816a836706c40a31c716952b74785102c90fd6afa7Rafael Espindolallvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { 6826a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const AliasAttr *AA = VD->getAttr<AliasAttr>(); 6836a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola assert(AA && "No alias?"); 6846a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6856a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); 6866a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6876a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // See if there is already something with the target's name in the module. 688f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); 6896a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6906a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::Constant *Aliasee; 6916a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (isa<llvm::FunctionType>(DeclTy)) 6921faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 6931faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 6946a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola else 695f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 6966a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::PointerType::getUnqual(DeclTy), 0); 6976a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (!Entry) { 6986a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); 6996a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola F->setLinkage(llvm::Function::ExternalWeakLinkage); 7006a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.insert(F); 7016a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 7026a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7036a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return Aliasee; 7046a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola} 7056a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 706b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 7074a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 7081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7096a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // Weak references don't produce any output by themselves. 7106a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (Global->hasAttr<WeakRefAttr>()) 7116a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return; 7126a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 713bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 714bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 71540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 716f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return EmitAliasDefinition(GD); 717219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 71867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 7195e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 720754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (FD->getIdentifier()) { 721754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = FD->getName(); 722754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_Block_object_assign") { 723754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl = FD; 724754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_Block_object_dispose") { 725754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl = FD; 726754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 727754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 728754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 72973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 73010620eb5164e31208fcbf0437cd79ae535ed0559Sean Hunt if (!FD->doesThisDeclarationHaveABody()) 73173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7320269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 7330269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 734bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 735bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 736754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (VD->getIdentifier()) { 737754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = VD->getName(); 738754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_NSConcreteGlobalBlock") { 739754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl = VD; 740754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_NSConcreteStackBlock") { 741754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl = VD; 742754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 743754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 744754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 745754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 746a9a55c063e9e59c6ab0a6d7a21302660f7bde9f9Douglas Gregor if (VD->isThisDeclarationADefinition() != VarDecl::Definition) 74773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7484c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 7494c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 75067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 75167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 7524357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (!MayDeferGeneration(Global)) { 7534357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Emit the definition if it can't be deferred. 7544357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner EmitGlobalDefinition(GD); 755bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 756bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 757bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall 758bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // If we're deferring emission of a C++ variable with an 759bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer, remember the order in which it appeared in the file. 760bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus && isa<VarDecl>(Global) && 761bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall cast<VarDecl>(Global)->hasInit()) { 762bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); 763bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall CXXGlobalInits.push_back(0); 764bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } 7654357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 7664357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // If the value has already been used, add it directly to the 7674357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit list. 7689a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 7694357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (GetGlobalValue(MangledName)) 7704357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDeclsToEmit.push_back(GD); 7714357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner else { 7724357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 7734357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // first use of the mangled name will cause it to move into 7744357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit. 7754357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDecls[MangledName] = GD; 7764357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner } 7774c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 7784c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 779b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 7804a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 7811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 782cb421fa690da545b58a720abe5f1c49b166dbde7Dan Gohman PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), 7838e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 7848e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 7858e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 78644eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 78744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // At -O0, don't generate IR for functions with available_externally 78844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // linkage. 7897feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor if (CodeGenOpts.OptimizationLevel == 0 && 7907feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor !Function->hasAttr<AlwaysInlineAttr>() && 79144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getFunctionLinkage(Function) 79244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor == llvm::Function::AvailableExternallyLinkage) 79344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return; 79444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor 79544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { 7967dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman // Make sure to emit the definition(s) before we emit the thunks. 7977dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman // This is necessary for the generation of certain thunks. 7987dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) 7997dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitCXXConstructor(CD, GD.getCtorType()); 8007dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman else if (const CXXDestructorDecl *DD =dyn_cast<CXXDestructorDecl>(Method)) 8017dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitCXXDestructor(DD, GD.getDtorType()); 8027dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman else 8037dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitGlobalFunctionDefinition(GD); 8047dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman 80544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (Method->isVirtual()) 80644eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getVTables().EmitThunks(GD); 8077270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson 8087dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman return; 80944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 810b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 811b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalFunctionDefinition(GD); 81244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 813b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 814b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 815b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalVarDefinition(VD); 8164357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 8174357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner assert(0 && "Invalid argument to EmitGlobalDefinition()"); 818bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 819bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 82074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 82174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 82274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 82374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 82474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 82574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 82674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 827f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 828f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMFunction(llvm::StringRef MangledName, 829f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *Ty, 8301faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson GlobalDecl D, bool ForVTable) { 8310558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 832f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 8330558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 8346a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 8356a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); 8366a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (FD && !FD->hasAttr<WeakAttr>()) 8377270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 8386a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8396a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 8406a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 8416a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8420558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 8430558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 8441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8450558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 84696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 8473c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, PTy); 8480558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 8491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 850654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 851654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 852654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 853654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 854784f21121a6c9418ebd86baa6814e36e1176c410John McCall 855784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::FunctionType *FTy; 856784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (isa<llvm::FunctionType>(Ty)) { 857784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = cast<llvm::FunctionType>(Ty); 858784f21121a6c9418ebd86baa6814e36e1176c410John McCall } else { 8590774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall FTy = llvm::FunctionType::get(VoidTy, false); 860654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 861654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 862bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 863784f21121a6c9418ebd86baa6814e36e1176c410John McCall llvm::Function *F = llvm::Function::Create(FTy, 864654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 865f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall MangledName, &getModule()); 866f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(F->getName() == MangledName && "name was uniqued!"); 867654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 868b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetFunctionAttributes(D, F, IsIncompleteFunction); 869654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 87067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 87167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 87267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 873f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 87467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 87567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 87667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 87767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 87867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 879bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall 880bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Otherwise, there are cases we have to worry about where we're 881bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // using a declaration for which we must emit a definition but where 882bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // we might not find a top-level definition: 883bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - member functions defined inline in their classes 884bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - friend functions defined inline in some class 885bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - special member functions with implicit definitions 886bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // If we ever change our AST traversal to walk into class methods, 887bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // this will be unnecessary. 8881faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // 8891faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // We also don't emit a definition for a function if it's going to be an entry 8901faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // in a vtable, unless it's already marked as used. 89101de7a44cea9f77cbcda65faad8edc8b48a3b617Rafael Espindola } else if (getLangOptions().CPlusPlus && D.getDecl()) { 892bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Look for a declaration that's lexically in a record. 893bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall const FunctionDecl *FD = cast<FunctionDecl>(D.getDecl()); 894bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall do { 895bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { 8961faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson if (FD->isImplicit() && !ForVTable) { 897bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall assert(FD->isUsed() && "Sema didn't mark implicit function as used!"); 898a29bf41b8f49578207ce36f6b21ff9bb7ee77babDouglas Gregor DeferredDeclsToEmit.push_back(D.getWithDecl(FD)); 899bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 90010620eb5164e31208fcbf0437cd79ae535ed0559Sean Hunt } else if (FD->doesThisDeclarationHaveABody()) { 901a29bf41b8f49578207ce36f6b21ff9bb7ee77babDouglas Gregor DeferredDeclsToEmit.push_back(D.getWithDecl(FD)); 902bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 903bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } 9047b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 905bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall FD = FD->getPreviousDeclaration(); 906bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } while (FD); 90767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 9081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 909784f21121a6c9418ebd86baa6814e36e1176c410John McCall // Make sure the result is of the requested type. 910784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (!IsIncompleteFunction) { 911784f21121a6c9418ebd86baa6814e36e1176c410John McCall assert(F->getType()->getElementType() == Ty); 912784f21121a6c9418ebd86baa6814e36e1176c410John McCall return F; 913784f21121a6c9418ebd86baa6814e36e1176c410John McCall } 914784f21121a6c9418ebd86baa6814e36e1176c410John McCall 915784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 916784f21121a6c9418ebd86baa6814e36e1176c410John McCall return llvm::ConstantExpr::getBitCast(F, PTy); 9170558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 9180558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 91974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 92074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 92174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 922b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 9231faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson const llvm::Type *Ty, 9241faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson bool ForVTable) { 92574391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 92674391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 9274a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 928bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 9299a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 9301faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson return GetOrCreateLLVMFunction(MangledName, Ty, GD, ForVTable); 93174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 93277ba708819285931932ecd33691a672bb59d221aEli Friedman 93374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 93474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 93574391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 93674391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 937f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 9381faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false); 93974391b48b4791cded373683a3baf67314f358d50Chris Lattner} 940bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 941da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregorstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D, 942da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor bool ConstantInit) { 94388786862424cb2d478516d911709dc19c962af9cJohn McCall if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) 94420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 945da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor 946da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (Context.getLangOptions().CPlusPlus) { 947da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (const RecordType *Record 948da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor = Context.getBaseElementType(D->getType())->getAs<RecordType>()) 9492bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor return ConstantInit && 9502bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor cast<CXXRecordDecl>(Record->getDecl())->isPOD() && 9512bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor !cast<CXXRecordDecl>(Record->getDecl())->hasMutableFields(); 95220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 953da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor 95420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 95520e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 95620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 95774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 95874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 95974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 96074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 96174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 96274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 96374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 964f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 965f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMGlobal(llvm::StringRef MangledName, 966f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::PointerType *Ty, 967c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola const VarDecl *D, 968c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola bool UnnamedAddr) { 9693c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 970f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 97199b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 9726a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 9736a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (D && !D->hasAttr<WeakAttr>()) 9747270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 9756a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 9766a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 9776a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 9786a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 979c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola if (UnnamedAddr) 980c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola Entry->setUnnamedAddr(true); 981c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola 98274391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 983570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 9841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 98599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 9863c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 98799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 9881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 98967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 99067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 99167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 992f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 99367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 99467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 99567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 99667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 99767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 99867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 9991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 10011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 100299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 1003f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 0, MangledName, 0, 100456ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 100549988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 100699b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 100774391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 1008f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 1009f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 1010da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor GV->setConstant(DeclIsConstantGlobal(Context, D, false)); 101149988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 1012110e8e56af30363072c140285961592b0107f789John McCall // Set linkage and visibility in case we never see a definition. 1013af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 1014af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() != ExternalLinkage) { 101515e310a3b970b64a84cb30f0005bc396b4d978cbJohn McCall // Don't set internal linkage on declarations. 1016110e8e56af30363072c140285961592b0107f789John McCall } else { 1017110e8e56af30363072c140285961592b0107f789John McCall if (D->hasAttr<DLLImportAttr>()) 1018110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::DLLImportLinkage); 10190a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor else if (D->hasAttr<WeakAttr>() || D->isWeakImported()) 1020110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 1021110e8e56af30363072c140285961592b0107f789John McCall 1022af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility on a declaration only if it's explicit. 1023af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.visibilityExplicit()) 1024af14603ca61757cf4361b583b45639a04c57e651John McCall GV->setVisibility(GetLLVMVisibility(LV.visibility())); 1025110e8e56af30363072c140285961592b0107f789John McCall } 102656ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 102756ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 102874391b48b4791cded373683a3baf67314f358d50Chris Lattner } 10291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1030f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GV; 103174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 1032eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 1033eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 10343bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlssonllvm::GlobalVariable * 10353bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders CarlssonCodeGenModule::CreateOrReplaceCXXRuntimeVariable(llvm::StringRef Name, 10363bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson const llvm::Type *Ty, 10373bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalValue::LinkageTypes Linkage) { 10383bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name); 10393bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *OldGV = 0; 10403bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10413bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10423bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV) { 10433bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Check if the variable has the right type. 10443bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV->getType()->getElementType() == Ty) 10453bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 10463bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10473bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Because C++ name mangling, the only way we can end up with an already 10483bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // existing global with the same name is if it has been declared extern "C". 104996eaf2992b5955d1470fc9cce7a96e7e1e3b4ea7Anders Carlsson assert(GV->isDeclaration() && "Declaration has wrong type!"); 10503bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV = GV; 10513bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10523bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10533bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Create a new variable. 10543bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV = new llvm::GlobalVariable(getModule(), Ty, /*isConstant=*/true, 10553bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson Linkage, 0, Name); 10563bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10573bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (OldGV) { 10583bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Replace occurrences of the old variable if needed. 10593bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV->takeName(OldGV); 10603bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10613bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (!OldGV->use_empty()) { 10623bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::Constant *NewPtrForOldDecl = 10633bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); 10643bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->replaceAllUsesWith(NewPtrForOldDecl); 10653bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10663bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10673bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->eraseFromParent(); 10683bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10693bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10703bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 10713bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson} 10723bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 107374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 107474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 107574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 107674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 107774391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 107874391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 107974391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 108074391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 108174391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 108274391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 10831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::PointerType *PTy = 1085207f4d8543529221932af82836016a2ef066c917Peter Collingbourne llvm::PointerType::get(Ty, getContext().getTargetAddressSpace(ASTTy)); 1086f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 10879a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1088f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMGlobal(MangledName, PTy, D); 108974391b48b4791cded373683a3baf67314f358d50Chris Lattner} 10903f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 109174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 109274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 109374391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 109474391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 1095f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 10961de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0, 1097c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola true); 1098bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1099bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 110003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 110103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 110203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 11037520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 11047520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 11057520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 11067520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 11079a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1108f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (!GetGlobalValue(MangledName)) { 1109555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 111003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 11117520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 11127520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 11137520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 11147520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 111503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 111603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 111703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 11186fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregorvoid CodeGenModule::EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired) { 11196fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor if (DefinitionRequired) 11206fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor getVTables().GenerateClassData(getVTableLinkage(Class), Class); 11216fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor} 11226fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor 11234b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregorllvm::GlobalVariable::LinkageTypes 1124046c294a43024874ff35656c6e785b64e72f1f36Anders CarlssonCodeGenModule::getVTableLinkage(const CXXRecordDecl *RD) { 1125dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (RD->isInAnonymousNamespace() || !RD->hasLinkage()) 1126dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::InternalLinkage; 1127dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1128dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (const CXXMethodDecl *KeyFunction 1129dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor = RD->getASTContext().getKeyFunction(RD)) { 1130dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // If this class has a key function, use that to determine the linkage of 1131dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // the vtable. 11324b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor const FunctionDecl *Def = 0; 113306a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (KeyFunction->hasBody(Def)) 11344b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor KeyFunction = cast<CXXMethodDecl>(Def); 1135dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 11364b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor switch (KeyFunction->getTemplateSpecializationKind()) { 11374b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_Undeclared: 11384b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitSpecialization: 11396d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // When compiling with optimizations turned on, we emit all vtables, 11406d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // even if the key function is not defined in the current translation 11416d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // unit. If this is the case, use available_externally linkage. 11426d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson if (!Def && CodeGenOpts.OptimizationLevel) 11436d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson return llvm::GlobalVariable::AvailableExternallyLinkage; 11446d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson 11454b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->isInlined()) 1146142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1147142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1148142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 11494b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11504b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::ExternalLinkage; 11514b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11524b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ImplicitInstantiation: 1153142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1154142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1155142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1156f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 11574b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDefinition: 1158142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1159142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::WeakODRLinkage : 1160142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1161f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 11624b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 11634b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // FIXME: Use available_externally linkage. However, this currently 11644b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // breaks LLVM's build due to undefined symbols. 11654b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1166142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1167142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1168142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 11694b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 1170dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor } 1171dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 117253bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian if (Context.getLangOptions().AppleKext) 117353bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::Function::InternalLinkage; 117453bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian 1175dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor switch (RD->getTemplateSpecializationKind()) { 1176dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_Undeclared: 1177dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitSpecialization: 1178dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ImplicitInstantiation: 1179dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // FIXME: Use available_externally linkage. However, this currently 1180dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // breaks LLVM's build due to undefined symbols. 1181dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1182142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDeclaration: 118353bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 1184142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian 1185142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDefinition: 118653bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 11874b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 11884b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11894b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // Silence GCC warning. 119053bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 11914b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor} 11924b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 1193687cc4a850b59116efee061018f0d8df50728b82Ken DyckCharUnits CodeGenModule::GetTargetTypeStoreSize(const llvm::Type *Ty) const { 119406f486ecd05bd6788da97c39164c1903a084c26dKen Dyck return Context.toCharUnitsFromBits( 119506f486ecd05bd6788da97c39164c1903a084c26dKen Dyck TheTargetData.getTypeStoreSizeInBits(Ty)); 1196687cc4a850b59116efee061018f0d8df50728b82Ken Dyck} 1197687cc4a850b59116efee061018f0d8df50728b82Ken Dyck 1198bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 11998f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 120077ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 12016c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman bool NonConstInit = false; 12021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 120331310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl const Expr *InitExpr = D->getAnyInitializer(); 12043bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson 12053bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson if (!InitExpr) { 1206cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 120703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 120803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 120903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 121003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 121103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 121203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 121303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 121403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 121503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 1216b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 121777ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 1218c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor Init = EmitConstantExpr(InitExpr, D->getType()); 12196e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 12203bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson QualType T = InitExpr->getType(); 1221c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor if (D->getType()->isReferenceType()) 1222c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor T = D->getType(); 1223c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor 122489ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 122589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 12266c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman NonConstInit = true; 122789ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 122889ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 122989ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 123089ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 1231bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } else { 1232bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // We don't need an initializer, so remove the entry for the delayed 1233bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer position (just in case this entry was delayed). 1234bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus) 1235bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition.erase(D); 12366e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 12378f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 12388e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 12392d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 1240570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 12411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1242570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 1243570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 12449d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 12459d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 12469d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 1247570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 1248570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 12491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1250570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 1251570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 12521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1253570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 1254570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 1255570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 1256570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 1257570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 1258570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 1259570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 1260570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 1261570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 1262570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 1263570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 1264207f4d8543529221932af82836016a2ef066c917Peter Collingbourne GV->getType()->getAddressSpace() != 1265207f4d8543529221932af82836016a2ef066c917Peter Collingbourne getContext().getTargetAddressSpace(ASTTy)) { 12661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1267f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // Move the old entry aside so that we'll create a new one. 1268f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Entry->setName(llvm::StringRef()); 1269232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 1270570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 1271570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 12720558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 127377ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 12741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 12753c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 1276570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 127777ba708819285931932ecd33691a672bb59d221aEli Friedman 127877ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 1279570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 128077ba708819285931932ecd33691a672bb59d221aEli Friedman } 128177ba708819285931932ecd33691a672bb59d221aEli Friedman 128240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 12838bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 12848bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 1285f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 12868bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 12878bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 128888a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 1289e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 1290e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 1291e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 1292da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (!NonConstInit && DeclIsConstantGlobal(Context, D, true)) 1293e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 12941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12958b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); 1296354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 129788a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 1298354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage = 1299354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GetLLVMLinkageVarDefinition(D, GV); 1300354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setLinkage(Linkage); 1301354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian if (Linkage == llvm::GlobalVariable::CommonLinkage) 1302354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // common vars aren't constant even if declared const. 1303354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setConstant(false); 1304354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1305354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian SetCommonAttributes(D, GV); 1306354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 13073030eb82593097502469a8b3fc26112c79c75605John McCall // Emit the initializer function if necessary. 13083030eb82593097502469a8b3fc26112c79c75605John McCall if (NonConstInit) 13093030eb82593097502469a8b3fc26112c79c75605John McCall EmitCXXGlobalVarDeclInitFunc(D, GV); 13103030eb82593097502469a8b3fc26112c79c75605John McCall 1311354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // Emit global variable debug information. 1312aa11289f754d220c9c155b68a4f84cdcfcefef6aDevang Patel if (CGDebugInfo *DI = getModuleDebugInfo()) { 1313354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->setLocation(D->getLocation()); 1314354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->EmitGlobalVariable(GV, D); 1315354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian } 1316354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian} 1317354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1318354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanianllvm::GlobalValue::LinkageTypes 1319354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz JahanianCodeGenModule::GetLLVMLinkageVarDefinition(const VarDecl *D, 1320354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalVariable *GV) { 132190e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); 1322a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 1323354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::InternalLinkage; 132440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1325354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLImportLinkage; 132640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1327354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLExportLinkage; 1328e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1329e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1330354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 1331e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1332354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 13338f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor } else if (Linkage == GVA_TemplateInstantiation || 13348f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor Linkage == GVA_ExplicitTemplateInstantiation) 133599ace16bc6962f1fc3dc45bbbdf2eb74e555a8adJohn McCall return llvm::GlobalVariable::WeakODRLinkage; 1336a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher else if (!getLangOptions().CPlusPlus && 1337a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher ((!CodeGenOpts.NoCommon && !D->getAttr<NoCommonAttr>()) || 1338a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher D->getAttr<CommonAttr>()) && 1339309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 134091f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher !D->getAttr<SectionAttr>() && !D->isThreadSpecified()) { 134191f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher // Thread local vars aren't considered common linkage. 1342354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::CommonLinkage; 1343686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 1344354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::ExternalLinkage; 134588a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 13465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1347bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1348bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1349bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1350bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1351bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1352bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1353bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1354bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1355bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1356bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1357bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1358bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1359bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1360bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 13611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1362bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 1363bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 1364bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1365bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1366dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer UI != E; ) { 1367bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 1368dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::Value::use_iterator I = UI++; // Increment before the CI is erased. 1369dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*I); 13708670cd3ea4dfbf86caacd270ec2441e9949bbb6aGabor Greif if (!CI) continue; // FIXME: when we allow Invoke, just do CallSite CS(*I) 137135db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif llvm::CallSite CS(CI); 1372dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer if (!CI || !CS.isCallee(I)) continue; 13731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1374bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1375bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1376bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1377bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1378bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1379bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1380bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1381bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1382bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1383bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1384bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1385bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 138635db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif if (CS.arg_size() == ArgNo || 138735db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif CS.getArgument(ArgNo)->getType() != AI->getType()) { 1388bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1389bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1390bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1391bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1392bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1393bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 13941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1395bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1396bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 13976ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif ArgList.append(CS.arg_begin(), CS.arg_begin() + ArgNo); 1398bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 1399bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 1400bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1401ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1402bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 1403bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 1404ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1405bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1406bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 140700549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 140800549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 14093b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1410c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner // Copy debug location attached to CI. 1411c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner if (!CI->getDebugLoc().isUnknown()) 1412c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner NewCall->setDebugLoc(CI->getDebugLoc()); 1413bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1414bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1415bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1416bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1417bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1418b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 1419b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 1420d26bc76c98006609002d9930f8840490e88ac5b5John McCall 14211f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall // Compute the function info and LLVM type. 1422d26bc76c98006609002d9930f8840490e88ac5b5John McCall const CGFunctionInfo &FI = getTypes().getFunctionInfo(GD); 14231f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall bool variadic = false; 14241f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall if (const FunctionProtoType *fpt = D->getType()->getAs<FunctionProtoType>()) 14251f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall variadic = fpt->isVariadic(); 14261f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall const llvm::FunctionType *Ty = getTypes().GetFunctionType(FI, variadic, false); 1427d26bc76c98006609002d9930f8840490e88ac5b5John McCall 14289fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1429b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 14301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14310558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 14320558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 14330558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 14340558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 14350558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 14361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14380558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1439bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 14401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 144142745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1442bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 14430558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 144434809507232bc4c3c4840c7d092c7440219fddafChris Lattner 144562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 144662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 144762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 144862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 144962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 145062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 1451f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // (e.g. "int f(int x)"). Move the old function aside so that it 1452f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // doesn't interfere with GetAddrOfFunction. 1453f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall OldFn->setName(llvm::StringRef()); 1454b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 14551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1456bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1457bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1458bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 14599fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1460bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 14619fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 14629fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 14631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 146462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1465bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 14661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 14673c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1468bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1469bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 14701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 147162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1472bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 14731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14740558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1475bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 14761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1477112c967bd5c862a0f5d7913aa06700c048807db8John McCall // We need to set linkage and visibility on the function before 1478112c967bd5c862a0f5d7913aa06700c048807db8John McCall // generating code for it because various parts of IR generation 1479112c967bd5c862a0f5d7913aa06700c048807db8John McCall // want to propagate this information down (e.g. to local static 1480112c967bd5c862a0f5d7913aa06700c048807db8John McCall // declarations). 14810558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 14828b2423361648c39a7d8a3c5e8129e12006deac32John McCall setFunctionLinkage(D, Fn); 1483bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1484112c967bd5c862a0f5d7913aa06700c048807db8John McCall // FIXME: this is redundant with part of SetFunctionDefinitionAttributes 14850ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(Fn, D); 1486112c967bd5c862a0f5d7913aa06700c048807db8John McCall 1487d26bc76c98006609002d9930f8840490e88ac5b5John McCall CodeGenFunction(*this).GenerateCode(D, Fn, FI); 14886379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 14897c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 14907c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 14911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 149240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1493219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 149440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1495219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1496bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1497bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1498f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallvoid CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { 1499f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 150040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1501bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1502bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 15039a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 1504f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1505f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // If there is a definition in the module, then it wins over the alias. 1506f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // This is dubious, but allow it to be safe. Just ignore the alias. 1507f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 1508f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (Entry && !Entry->isDeclaration()) 1509f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return; 15101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1511f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1512bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1513bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1514bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1515bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1516bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 15171faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 15181faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 1519bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1520f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 152196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1522bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1523bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 15241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1525bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1526bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1527bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 15281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1529bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1530f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(Entry->isDeclaration()); 1531f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1532bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1533bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1534bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1535bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1536bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1537bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1538bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1539f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GA->takeName(Entry); 15401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15413c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1542bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1543bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1544f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall } else { 15459a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson GA->setName(MangledName); 1546bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 15471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15487c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 15497c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 15507c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 155140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 15527c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 15537c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 155406a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (FD->hasBody()) 15557c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 15567c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 15577c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 15587c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 15591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 156011e8ce7380856abee188b237c2600272df2ed09dRafael Espindola D->hasAttr<WeakRefAttr>() || 15610a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor D->isWeakImported()) { 15627c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 15637c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 15647c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 15657c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1566bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1567bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1568b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1569b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 157034771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbarllvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, 157134771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar unsigned BuiltinID) { 15723e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 15731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 15743e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 15751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15763e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 15774fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger llvm::StringRef Name; 15784fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger GlobalDecl D(FD); 15794fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger 15804fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger // If the builtin has been declared explicitly with an assembler label, 15814fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger // use the mangled name. This differs from the plain label on platforms 15824fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger // that prefix labels. 158362c296e1bd7581a444c2dc7ddb76f0bf2f364f23Joerg Sonnenberger if (FD->hasAttr<AsmLabelAttr>()) 15844fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger Name = getMangledName(D); 15854fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger else if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 15864fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger Name = Context.BuiltinInfo.GetName(BuiltinID) + 10; 15874fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger else 15884fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger Name = Context.BuiltinInfo.GetName(BuiltinID); 15894fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger 15901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::FunctionType *Ty = 1592386ca78d0b03b1fb519e60d1a14cd12a220364a6Eli Friedman cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); 1593bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 15944fe497d5cd34a7dca6e68b2e0a00fe2293570742Joerg Sonnenberger return GetOrCreateLLVMFunction(Name, Ty, D, /*ForVTable=*/false); 1595bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1596bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 15977acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 15987acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 15997acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 16007acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 16017acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1602bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 16031d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 16041d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 16051d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 160670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 16071d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 16081d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 16092f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer llvm::StringRef String = Literal->getString(); 16102f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer unsigned NumBytes = String.size(); 16111d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1612f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1613f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1614f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 16152f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer return Map.GetOrCreateValue(String); 1616f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1617f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 16181d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 16191d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); 16202f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer const UTF8 *FromPtr = (UTF8 *)String.data(); 16211d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 16221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1623e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian (void)ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 1624e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian &ToPtr, ToPtr + NumBytes, 1625e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian strictConversion); 16261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 162770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 16281d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 162970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 163070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 163170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 163270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 163370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 163470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 163570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 163670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 163770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 163870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 163970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 164070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 164170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 164270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 164370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 164470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 164570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1646434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1647434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1648434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 164970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 16501d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 165170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); 16521d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 16531d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1654cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanianstatic llvm::StringMapEntry<llvm::Constant*> & 1655cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz JahanianGetConstantStringEntry(llvm::StringMap<llvm::Constant*> &Map, 1656cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian const StringLiteral *Literal, 1657cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian unsigned &StringLength) 1658cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian{ 1659cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian llvm::StringRef String = Literal->getString(); 1660cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian StringLength = String.size(); 1661cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian return Map.GetOrCreateValue(String); 1662cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian} 1663cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian 16641d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 16651d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 16661d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 16671d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 16681d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 16691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 167070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 167170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 16721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16731d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 16741d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 16751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16760032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 16770032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 16783e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 16791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16809d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1681c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1682c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 168396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 16841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 16859d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 16863e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 16873e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 16883c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1689c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 16901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1691e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 16923e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 16931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::StructType *STy = 1694e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1695e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 16965add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 169744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1698c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 16995add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 17001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1701c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 17023e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 17031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 17045add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 17055add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1706c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 17070032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1708a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 170995b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1710278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner bool isConstant; 1711a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1712278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 171395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1714278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // Note: -fwritable-strings doesn't make unicode CFStrings writable, but 1715278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // does make plain ascii ones writable. 1716278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = true; 1717a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 1718584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // FIXME: With OS X ld 123.2 (xcode 4) and LTO we would get a linker error 1719584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // when using private linkage. It is not clear if this is a bug in ld 1720584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // or a reasonable new restriction. 1721dc0f137295bc7ec5b231ff1842388f149f43c0c8Rafael Espindola Linkage = llvm::GlobalValue::LinkerPrivateLinkage; 1722278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = !Features.WritableStrings; 1723a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1724278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 17251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 1726278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 1727278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner ".str"); 1728b266a1fce09ab4ee7033268199509aacfbef056aRafael Espindola GV->setUnnamedAddr(true); 1729a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 17304da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 17314da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck GV->setAlignment(Align.getQuantity()); 1732f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar } else { 1733f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar CharUnits Align = getContext().getTypeAlignInChars(getContext().CharTy); 1734f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar GV->setAlignment(Align.getQuantity()); 1735a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 17365add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 17375add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1738c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1739c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 17405add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 17411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1742c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 174308e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 17441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 17451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 174695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 17478e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 17488e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 17491d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 17501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17510c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1752c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 175345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 175433e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanianllvm::Constant * 17554c73307c74764ba99e1379677fe92af72f676531Fariborz JahanianCodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) { 17562bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian unsigned StringLength = 0; 17572bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::StringMapEntry<llvm::Constant*> &Entry = 1758cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian GetConstantStringEntry(CFConstantStringMap, Literal, StringLength); 17592bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17602bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (llvm::Constant *C = Entry.getValue()) 17612bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return C; 17622bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17632bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zero = 17642bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 17652bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zeros[] = { Zero, Zero }; 17662bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 1767ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian // If we don't already have it, get _NSConstantStringClassReference. 17684c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (!ConstantStringClassRef) { 17694c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string StringClass(getLangOptions().ObjCConstantStringClass); 17702bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 17712bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Ty = llvm::ArrayType::get(Ty, 0); 17724c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::Constant *GV; 17734c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (StringClass.empty()) 17744c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian GV = CreateRuntimeVariable(Ty, 17754c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Features.ObjCNonFragileABI ? 17764c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian "OBJC_CLASS_$_NSConstantString" : 17774c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian "_NSConstantStringClassReference"); 17784c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian else { 17794c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string str; 17804c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (Features.ObjCNonFragileABI) 17814c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian str = "OBJC_CLASS_$_" + StringClass; 17824c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian else 17834c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian str = "_" + StringClass + "ClassReference"; 17844c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian GV = CreateRuntimeVariable(Ty, str); 17854c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian } 17862bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Decay array -> ptr 17874c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian ConstantStringClassRef = 17884c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 17892bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 17902bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17912bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian QualType NSTy = getContext().getNSConstantStringType(); 17922bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17932bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::StructType *STy = 17942bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian cast<llvm::StructType>(getTypes().ConvertType(NSTy)); 17952bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17962bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian std::vector<llvm::Constant*> Fields(3); 17972bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17982bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Class pointer. 17994c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Fields[0] = ConstantStringClassRef; 18002bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18012bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String pointer. 18022bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 18032bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18042bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage; 18052bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isConstant; 1806cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian Linkage = llvm::GlobalValue::PrivateLinkage; 1807cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian isConstant = !Features.WritableStrings; 18082bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18092bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable *GV = 18102bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 18112bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian ".str"); 1812803d307a5385059b1a84dfe9706ab158c80a20dcRafael Espindola GV->setUnnamedAddr(true); 1813cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian CharUnits Align = getContext().getTypeAlignInChars(getContext().CharTy); 1814cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian GV->setAlignment(Align.getQuantity()); 18152bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 18162bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18172bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String length. 18182bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 18192bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[2] = llvm::ConstantInt::get(Ty, StringLength); 18202bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18212bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // The struct. 18222bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian C = llvm::ConstantStruct::get(STy, Fields); 18232bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 18242bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable::PrivateLinkage, C, 18252bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian "_unnamed_nsstring_"); 18262bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME. Fix section. 1827ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian if (const char *Sect = 1828ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian Features.ObjCNonFragileABI 1829ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian ? getContext().Target.getNSStringNonFragileABISection() 1830ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian : getContext().Target.getNSStringSection()) 18312bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setSection(Sect); 18322bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Entry.setValue(GV); 18332bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18342bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return GV; 183533e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian} 183633e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian 18376143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 18381e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 18396143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 18403b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck const ASTContext &Context = getContext(); 18411e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 18423b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck Context.getAsConstantArrayType(E->getType()); 18431e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 18441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1845dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 18461e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 18471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1848dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 18493b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck RealLen *= Context.Target.getWCharWidth() / Context.getCharWidth(); 18501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18512f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer std::string Str = E->getString().str(); 18521e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 18531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18541e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 18551e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 18561e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 18576143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 18586143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 18596143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 18606143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 18616143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 18627eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 18637eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); 18647eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman if (S->isWide()) { 18657eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Type *DestTy = 18667eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); 18677eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman C = llvm::ConstantExpr::getBitCast(C, DestTy); 18687eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 18697eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman return C; 18706143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 18716143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1872eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1873eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1874eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1875eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1876eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1877eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1878a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1879a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1880eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1881eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1882eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1883a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 18849de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramerstatic llvm::Constant *GenerateStringLiteral(llvm::StringRef str, 188545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 18865fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 18875fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 18886143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 18890032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 18900032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 18911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 189245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 18931257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalVariable *GV = 18941257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 18951257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalValue::PrivateLinkage, 18961257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola C, GlobalName); 18971257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola GV->setUnnamedAddr(true); 18981257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola return GV; 189945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 190045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 19016143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 19026143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 19036143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 19046143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 19056143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 19066143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 19076143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 19086143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 19099de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramerllvm::Constant *CodeGenModule::GetAddrOfConstantString(llvm::StringRef Str, 19105fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 19118e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 19128e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 19138e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 19148e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 191595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 19168e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 19178e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 19188e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 19199de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer return GenerateStringLiteral(Str, false, *this, GlobalName); 19201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StringMapEntry<llvm::Constant *> &Entry = 19229de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer ConstantStringMap.GetOrCreateValue(Str); 192345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 192445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1925eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 192645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 192745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 19289de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer llvm::Constant *C = GenerateStringLiteral(Str, true, *this, GlobalName); 192945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 193045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 193145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 19326143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 19336143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 19349de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer/// array containing the literal and a terminating '\0' 19356143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 19369de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramerllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &Str, 19375fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 19389de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer llvm::StringRef StrWithNull(Str.c_str(), Str.size() + 1); 19399de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer return GetAddrOfConstantString(StrWithNull, GlobalName); 19406143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 194141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1942af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1943af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 19441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 1945af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 19461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 194717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 1948af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 19491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1950af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1951af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1952af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1953af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1954af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1955af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1956af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1957af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1958af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 195917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 1960fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1961fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1962af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 196317945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 1964fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1965fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1966af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1967af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1968af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1969af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1970e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCallstatic bool needsDestructMethod(ObjCImplementationDecl *impl) { 1971e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCInterfaceDecl *iface 1972e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall = const_cast<ObjCInterfaceDecl*>(impl->getClassInterface()); 1973e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall for (ObjCIvarDecl *ivar = iface->all_declared_ivar_begin(); 1974e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ivar; ivar = ivar->getNextIvar()) 1975e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall if (ivar->getType().isDestructedType()) 1976e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall return true; 1977e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 1978e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall return false; 1979e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall} 1980e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 1981109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// EmitObjCIvarInitializations - Emit information for ivar initialization 1982109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// for an implementation. 1983109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanianvoid CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { 1984e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // We might need a .cxx_destruct even if we don't have any ivar initializers. 1985e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall if (needsDestructMethod(D)) { 1986e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); 1987e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 1988e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCMethodDecl *DTORMethod = 1989e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCMethodDecl::Create(getContext(), D->getLocation(), D->getLocation(), 1990e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall cxxSelector, getContext().VoidTy, 0, D, true, 1991e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall false, true, false, ObjCMethodDecl::Required); 1992e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall D->addInstanceMethod(DTORMethod); 1993e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); 1994e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall } 1995e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 1996e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // If the implementation doesn't have any ivar initializers, we don't need 1997e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // a .cxx_construct. 1998827bbcc8a9115782693b21030a45378abe5c1862David Chisnall if (D->getNumIvarInitializers() == 0) 1999109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian return; 2000109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 2001e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall IdentifierInfo *II = &getContext().Idents.get(".cxx_construct"); 2002e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 2003109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian // The constructor returns 'self'. 2004109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), 2005109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 2006109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 2007109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().getObjCIdType(), 0, 2008e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall D, true, false, true, false, 2009109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 2010109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(CTORMethod); 2011109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); 2012109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian} 2013109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 201491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 2015984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 201617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 2017984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 2018984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 2019984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 2020984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 202191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 202291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 2023f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 2024f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 202591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 202691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 202791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 202891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 202917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 203091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 203191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 203291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 203391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 203441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 203541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 203641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 203741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 203841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 203941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 204041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 204141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 204216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 204316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 204416e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 20451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 204641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 2047293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 20482b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 204941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 205016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 20518387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() || 20528387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet cast<FunctionDecl>(D)->isLateTemplateParsed()) 205316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 20541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2055555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 2056555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 2057555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 205841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 2059555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 206041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 206141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 206226fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall // Indirect fields from global anonymous structs and unions can be 206326fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall // ignored; only the actual variable requires IR gen support. 206426fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall case Decl::IndirectField: 206526fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall break; 206626fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall 206795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 206841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 2069984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 207041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 20719cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 20729d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 20739cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 2074dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 2075127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 2076127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 20773e4c6c4c79a03f5cb0c4671d7c282d623c6dc35eRichard Smith case Decl::TypeAliasTemplate: 2078018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 20799cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 208095d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 20811fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 20828387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() || 20838387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet cast<FunctionDecl>(D)->isLateTemplateParsed()) 20841fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 20851fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 208695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 208795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 208827ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 20898387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->isLateTemplateParsed()) 20908387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet return; 209127ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 209227ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 209336674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 209436674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 209536674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 209636674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 209736674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 209895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 20991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 210038e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 210141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 210241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 2103b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 210441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 2105000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 2106baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner case Decl::ObjCCategory: { 2107baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D); 2108baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner if (CD->IsClassExtension() && CD->hasSynthBitfield()) 2109baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner Context.ResetObjCLayout(CD->getClassInterface()); 2110baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner break; 2111baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner } 2112285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 211341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 2114b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 211541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 211641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 211741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 2118af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 2119af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 212041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 212141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 212241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 2123af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 2124af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 2125000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (Features.ObjCNonFragileABI2 && OMD->hasSynthBitfield()) 2126000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(OMD->getClassInterface()); 2127af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 2128109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian EmitObjCIvarInitializations(OMD); 2129af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 213041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 21311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 213241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 213341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 213441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 21356fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 213641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 213741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 213841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 21391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 2140305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 214141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 214241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 214391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 214491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 214541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 214641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 214741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 214841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 21498d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer llvm::StringRef AsmString = AD->getAsmString()->getString(); 21501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 215141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 215241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 215341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 215441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 21558d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 215641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 215741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 21581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 21591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 2160f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 2161f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 2162f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 216341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 216441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 216541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 2166744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2167744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Turns the given pointer into a constant. 2168744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, 2169744016dde06fcffd50931e94a98c850f8b12cd87John McCall const void *Ptr) { 2170744016dde06fcffd50931e94a98c850f8b12cd87John McCall uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); 2171744016dde06fcffd50931e94a98c850f8b12cd87John McCall const llvm::Type *i64 = llvm::Type::getInt64Ty(Context); 2172744016dde06fcffd50931e94a98c850f8b12cd87John McCall return llvm::ConstantInt::get(i64, PtrInt); 2173744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2174744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2175744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic void EmitGlobalDeclMetadata(CodeGenModule &CGM, 2176744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *&GlobalMetadata, 2177744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl D, 2178744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr) { 2179744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (!GlobalMetadata) 2180744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata = 2181744016dde06fcffd50931e94a98c850f8b12cd87John McCall CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); 2182744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2183744016dde06fcffd50931e94a98c850f8b12cd87John McCall // TODO: should we report variant information for ctors/dtors? 2184744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Ops[] = { 2185744016dde06fcffd50931e94a98c850f8b12cd87John McCall Addr, 2186744016dde06fcffd50931e94a98c850f8b12cd87John McCall GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) 2187744016dde06fcffd50931e94a98c850f8b12cd87John McCall }; 21886f141659cab11109d9931d92d0988f8850778de3Jay Foad GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops)); 2189744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2190744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2191744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes associating all the global values in the 2192744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// current module with the Decls they came from. This is useful for 2193744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// projects using IR gen as a subroutine. 2194744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// 2195744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Since there's currently no way to associate an MDNode directly 2196744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with an llvm::GlobalValue, we create a global named metadata 2197744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with the name 'clang.global.decl.ptrs'. 2198744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenModule::EmitDeclMetadata() { 2199744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2200744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2201744016dde06fcffd50931e94a98c850f8b12cd87John McCall // StaticLocalDeclMap 2202744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<GlobalDecl,llvm::StringRef>::iterator 2203744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = MangledDeclNames.begin(), E = MangledDeclNames.end(); 2204744016dde06fcffd50931e94a98c850f8b12cd87John McCall I != E; ++I) { 2205744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); 2206744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); 2207744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2208744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2209744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2210744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes for all the local variables in the current 2211744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// function. 2212744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenFunction::EmitDeclMetadata() { 2213744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (LocalDeclMap.empty()) return; 2214744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2215744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::LLVMContext &Context = getLLVMContext(); 2216744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2217744016dde06fcffd50931e94a98c850f8b12cd87John McCall // Find the unique metadata ID for this name. 2218744016dde06fcffd50931e94a98c850f8b12cd87John McCall unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); 2219744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2220744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2221744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2222744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator 2223744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { 2224744016dde06fcffd50931e94a98c850f8b12cd87John McCall const Decl *D = I->first; 2225744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Addr = I->second; 2226744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2227744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { 2228744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); 22296f141659cab11109d9931d92d0988f8850778de3Jay Foad Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, DAddr)); 2230744016dde06fcffd50931e94a98c850f8b12cd87John McCall } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { 2231744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); 2232744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); 2233744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2234744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2235744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2236673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 22373dc05418538c719fea48b906bfa4febe5296e126Nick Lewyckyvoid CodeGenModule::EmitCoverageFile() { 22383dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky if (!getCodeGenOpts().CoverageFile.empty()) { 22395ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky if (llvm::NamedMDNode *CUNode = TheModule.getNamedMetadata("llvm.dbg.cu")) { 22405ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::NamedMDNode *GCov = TheModule.getOrInsertNamedMetadata("llvm.gcov"); 22415ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::LLVMContext &Ctx = TheModule.getContext(); 22423dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::MDString *CoverageFile = 22433dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::MDString::get(Ctx, getCodeGenOpts().CoverageFile); 22445ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky for (int i = 0, e = CUNode->getNumOperands(); i != e; ++i) { 22455ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::MDNode *CU = CUNode->getOperand(i); 22463dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::Value *node[] = { CoverageFile, CU }; 22475ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::MDNode *N = llvm::MDNode::get(Ctx, node); 22485ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky GCov->addOperand(N); 22495ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 22505ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 22515ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 22525ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky} 22535ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky 2254673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@name Custom Runtime Function Interfaces 2255673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@{ 2256673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// 2257673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// FIXME: These can be eliminated once we can have clients just get the required 2258673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// AST nodes from the builtin tables. 2259673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2260673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectDispose() { 2261673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectDispose) 2262673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose; 2263673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2264754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2265754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectDisposeDecl) { 2266754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectDispose = GetAddrOfFunction( 2267754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl, 2268754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectDisposeDecl)); 2269754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2270754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2271754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 22720774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall const llvm::Type *args[] = { Int8PtrTy, Int32Ty }; 22730774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall const llvm::FunctionType *fty 22740774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall = llvm::FunctionType::get(VoidTy, args, false); 2275673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose = 22760774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall CreateRuntimeFunction(fty, "_Block_object_dispose"); 2277673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2278673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2279673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectAssign() { 2280673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectAssign) 2281673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign; 2282673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2283754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2284754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectAssignDecl) { 2285754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectAssign = GetAddrOfFunction( 2286754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl, 2287754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectAssignDecl)); 2288754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2289754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2290754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 22910774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall const llvm::Type *args[] = { Int8PtrTy, Int8PtrTy, Int32Ty }; 22920774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall const llvm::FunctionType *fty 22930774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall = llvm::FunctionType::get(VoidTy, args, false); 2294673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign = 22950774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall CreateRuntimeFunction(fty, "_Block_object_assign"); 2296673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2297673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2298673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteGlobalBlock() { 2299673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteGlobalBlock) 2300673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteGlobalBlock; 2301754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2302754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2303754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteGlobalBlockDecl) { 2304754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteGlobalBlock = GetAddrOfGlobalVar( 2305754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl, 2306754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteGlobalBlockDecl->getType())); 2307754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2308754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2309754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2310d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall return NSConcreteGlobalBlock = 2311d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall CreateRuntimeVariable(Int8PtrTy, "_NSConcreteGlobalBlock"); 2312673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2313673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2314673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteStackBlock() { 2315673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteStackBlock) 2316673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteStackBlock; 2317754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2318754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2319754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteStackBlockDecl) { 2320754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteStackBlock = GetAddrOfGlobalVar( 2321754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl, 2322754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteStackBlockDecl->getType())); 2323754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2324754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2325754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2326d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall return NSConcreteStackBlock = 2327d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall CreateRuntimeVariable(Int8PtrTy, "_NSConcreteStackBlock"); 2328673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2329673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2330673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@} 2331