CodeGenModule.cpp revision 32096695c76033a6b0b1747c439f7378a11e8312
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), 67aa11289f754d220c9c155b68a4f84cdcfcefef6aDevang Patel VTables(*this), Runtime(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) { 753c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner if (!Features.ObjC1) 763c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = 0; 773c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (!Features.NeXTRuntime) 783c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateGNUObjCRuntime(*this); 793c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (Features.ObjCNonFragileABI) 803c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacNonFragileABIObjCRuntime(*this); 813c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else 823c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacObjCRuntime(*this); 83e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 843d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman // Enable TBAA unless it's suppressed. 853d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!CodeGenOpts.RelaxedAliasing && CodeGenOpts.OptimizationLevel > 0) 860b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman TBAA = new CodeGenTBAA(Context, VMContext, getLangOptions(), 870b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman ABI.getMangleContext()); 883d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 89e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 9020f12a20ba9cfa6f8d53c8304e24f50903c45184Anders Carlsson DebugInfo = CodeGenOpts.DebugInfo ? new CGDebugInfo(*this) : 0; 91d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall 92d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall Block.GlobalUniqueCount = 0; 935936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall 945936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall // Initialize the type cache. 955936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall llvm::LLVMContext &LLVMContext = M.getContext(); 965936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8Ty = llvm::Type::getInt8Ty(LLVMContext); 975936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int32Ty = llvm::Type::getInt32Ty(LLVMContext); 985936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int64Ty = llvm::Type::getInt64Ty(LLVMContext); 995936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall PointerWidthInBits = C.Target.getPointerWidth(0); 10034695856c0e67b3765b46304cc71b5d2cd5b71c7John McCall PointerAlignInBytes = 10134695856c0e67b3765b46304cc71b5d2cd5b71c7John McCall C.toCharUnitsFromBits(C.Target.getPointerAlign(0)).getQuantity(); 1025936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall IntTy = llvm::IntegerType::get(LLVMContext, C.Target.getIntWidth()); 1035936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall IntPtrTy = llvm::IntegerType::get(LLVMContext, PointerWidthInBits); 1045936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8PtrTy = Int8Ty->getPointerTo(0); 1055936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8PtrPtrTy = Int8PtrTy->getPointerTo(0); 1062b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 1072b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 1082b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 109815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 110f16aa103d3afd42fbca2ab346f191bf745cec092John McCall delete &ABI; 1114376c85fb0ac9e7fd779d246efc77e1169179138Dan Gohman delete TBAA; 112815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 113815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 114815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 1150d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnallvoid CodeGenModule::createObjCRuntime() { 1160d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall if (!Features.NeXTRuntime) 1170d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateGNUObjCRuntime(*this); 1180d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else if (Features.ObjCNonFragileABI) 1190d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateMacNonFragileABIObjCRuntime(*this); 1200d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else 1210d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateMacObjCRuntime(*this); 1220d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall} 1230d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall 124815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 12582227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 1266c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalInitFunc(); 127efb0fa9e11f75af51744a6159530ef7cc8efa24aDaniel Dunbar EmitCXXGlobalDtorFunc(); 128208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 129208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 130208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 1316bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 1326bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 133532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 1340269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 135744016dde06fcffd50931e94a98c850f8b12cd87John McCall 136b25938303de0976b9f189363d43033e5788e3d36John McCall SimplifyPersonality(); 137b25938303de0976b9f189363d43033e5788e3d36John McCall 138744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (getCodeGenOpts().EmitDeclMetadata) 139744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitDeclMetadata(); 140f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 141f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 1423d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanllvm::MDNode *CodeGenModule::getTBAAInfo(QualType QTy) { 1433d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!TBAA) 1443d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return 0; 1453d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return TBAA->getTBAAInfo(QTy); 1463d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1473d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1483d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanvoid CodeGenModule::DecorateInstruction(llvm::Instruction *Inst, 1493d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman llvm::MDNode *TBAAInfo) { 1503d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman Inst->setMetadata(llvm::LLVMContext::MD_tbaa, TBAAInfo); 1513d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1523d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1536374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCallbool CodeGenModule::isTargetDarwin() const { 1546374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall return getContext().Target.getTriple().getOS() == llvm::Triple::Darwin; 1556374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall} 1566374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 15732096695c76033a6b0b1747c439f7378a11e8312John McCallvoid CodeGenModule::Error(SourceLocation loc, llvm::StringRef error) { 15832096695c76033a6b0b1747c439f7378a11e8312John McCall unsigned diagID = getDiags().getCustomDiagID(Diagnostic::Error, error); 15932096695c76033a6b0b1747c439f7378a11e8312John McCall getDiags().Report(Context.getFullLoc(loc), diagID); 16032096695c76033a6b0b1747c439f7378a11e8312John McCall} 16132096695c76033a6b0b1747c439f7378a11e8312John McCall 162488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 1632c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 16490df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 16590df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 16690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 16790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 16956b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 1702c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 1710a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 1720a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 1732c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 17458c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 175488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 176c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 17790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 17890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 17990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 18090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 18256b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 183c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 1840a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 185c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 186c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 1871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 1880ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson const NamedDecl *D) const { 18904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 190df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 1917e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 1926ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 1937e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1946ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 195af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility for definitions. 196af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 197071d3af0de273b1079d79f7f979264f28d567373Rafael Espindola if (LV.visibilityExplicit() || !GV->hasAvailableExternallyLinkage()) 198071d3af0de273b1079d79f7f979264f28d567373Rafael Espindola GV->setVisibility(GetLLVMVisibility(LV.visibility())); 1997cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 2007cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 201cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// Set the symbol visibility of type information (vtable and RTTI) 202cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// associated with the given type. 203cbfe50224b19119e759802bd0c1463269dffd09eJohn McCallvoid CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV, 204cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall const CXXRecordDecl *RD, 205fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson TypeVisibilityKind TVK) const { 2060ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(GV, RD); 207cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 208279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakVTables) 209279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall return; 210279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall 2119a86a137b0872bad25161fb3408a71d919638757Anders Carlsson // We never want to drop the visibility for RTTI names. 2129a86a137b0872bad25161fb3408a71d919638757Anders Carlsson if (TVK == TVK_ForRTTIName) 2139a86a137b0872bad25161fb3408a71d919638757Anders Carlsson return; 2149a86a137b0872bad25161fb3408a71d919638757Anders Carlsson 215cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We want to drop the visibility to hidden for weak type symbols. 216cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // This isn't possible if there might be unresolved references 217cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // elsewhere that rely on this symbol being visible. 218cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2197a536907da776bdc47a704e7cafd641e8150e653John McCall // This should be kept roughly in sync with setThunkVisibility 2207a536907da776bdc47a704e7cafd641e8150e653John McCall // in CGVTables.cpp. 2217a536907da776bdc47a704e7cafd641e8150e653John McCall 222cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Preconditions. 223f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson if (GV->getLinkage() != llvm::GlobalVariable::LinkOnceODRLinkage || 224cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->getVisibility() != llvm::GlobalVariable::DefaultVisibility) 225cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 226cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 227cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Don't override an explicit visibility attribute. 228cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (RD->hasAttr<VisibilityAttr>()) 229cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 230cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 231cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall switch (RD->getTemplateSpecializationKind()) { 232cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We have to disable the optimization if this is an EI definition 233cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // because there might be EI declarations in other shared objects. 234cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDefinition: 235cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDeclaration: 236cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 237cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2387a536907da776bdc47a704e7cafd641e8150e653John McCall // Every use of a non-template class's type information has to emit it. 239cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_Undeclared: 240cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 241cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2427a536907da776bdc47a704e7cafd641e8150e653John McCall // In theory, implicit instantiations can ignore the possibility of 2437a536907da776bdc47a704e7cafd641e8150e653John McCall // an explicit instantiation declaration because there necessarily 2447a536907da776bdc47a704e7cafd641e8150e653John McCall // must be an EI definition somewhere with default visibility. In 2457a536907da776bdc47a704e7cafd641e8150e653John McCall // practice, it's possible to have an explicit instantiation for 2467a536907da776bdc47a704e7cafd641e8150e653John McCall // an arbitrary template class, and linkers aren't necessarily able 2477a536907da776bdc47a704e7cafd641e8150e653John McCall // to deal with mixed-visibility symbols. 2487a536907da776bdc47a704e7cafd641e8150e653John McCall case TSK_ExplicitSpecialization: 249cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ImplicitInstantiation: 250279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakTemplateVTables) 2517a536907da776bdc47a704e7cafd641e8150e653John McCall return; 252cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 253cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall } 254cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 255cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // If there's a key function, there may be translation units 256cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // that don't have the key function's definition. But ignore 257cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // this if we're emitting RTTI under -fno-rtti. 258fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson if (!(TVK != TVK_ForRTTI) || Features.RTTI) { 259cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (Context.getKeyFunction(RD)) 260cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 261fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson } 262cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 263cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Otherwise, drop the visibility to hidden. 264cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 265b1c65ff108de47a89585ad37874bd6cb232664cdRafael Espindola GV->setUnnamedAddr(true); 266cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall} 267cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 268793a990774826a0c20b0da66cec0991badfb8b63Anders Carlssonllvm::StringRef CodeGenModule::getMangledName(GlobalDecl GD) { 269793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 270793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 271793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; 272793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (!Str.empty()) 273793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 274793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 2754c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall if (!getCXXABI().getMangleContext().shouldMangleDeclName(ND)) { 276793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson IdentifierInfo *II = ND->getIdentifier(); 277793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson assert(II && "Attempt to mangle unnamed decl."); 278793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 279793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = II->getName(); 280793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 281793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson } 282793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 283793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::SmallString<256> Buffer; 284c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola llvm::raw_svector_ostream Out(Buffer); 285793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 286c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Out); 287793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 288c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Out); 289793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const BlockDecl *BD = dyn_cast<BlockDecl>(ND)) 290c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleBlock(BD, Out); 291793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else 292c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleName(ND, Out); 293793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 294793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson // Allocate space for the mangled name. 295c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola Out.flush(); 296793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson size_t Length = Buffer.size(); 297793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson char *Name = MangledNamesAllocator.Allocate<char>(Length); 298793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson std::copy(Buffer.begin(), Buffer.end(), Name); 299793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 300793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = llvm::StringRef(Name, Length); 301793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 302793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 303793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson} 304793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 30514110477887e3dc168ffc6c191e72d705051f99ePeter Collingbournevoid CodeGenModule::getBlockMangledName(GlobalDecl GD, MangleBuffer &Buffer, 30614110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const BlockDecl *BD) { 30714110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleContext &MangleCtx = getCXXABI().getMangleContext(); 30814110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const Decl *D = GD.getDecl(); 309c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola llvm::raw_svector_ostream Out(Buffer.getBuffer()); 31014110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne if (D == 0) 311c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleGlobalBlock(BD, Out); 31214110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 313c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleCtorBlock(CD, GD.getCtorType(), BD, Out); 31414110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 315c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleDtorBlock(DD, GD.getDtorType(), BD, Out); 31614110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else 317c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleBlock(cast<DeclContext>(D), BD, Out); 3189a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson} 3199a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson 320f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::GlobalValue *CodeGenModule::GetGlobalValue(llvm::StringRef Name) { 321f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return getModule().getNamedValue(Name); 3225f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 3235f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 3246d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 3256d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 3266bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 32749988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3286bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 3296d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3306d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 3316bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 3326bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 3336bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 33449988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3356bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 3366bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 3376bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3386bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 3396bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 3406bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 34115f6765f6efd24bec4ec6f54e282c14193ef4014Benjamin Kramer llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), false); 34296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 3436bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3446bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 3451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType* CtorStructTy = 3461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), 34796e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 3486bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3496bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 3506bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 3516bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 3526bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 3531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 3540032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 3553c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 35608e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 3576bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 3586bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3596bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 36096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 3611c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 362572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 3637db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 3641c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 3656d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 3666d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3676d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 368532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 369532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 370532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 371532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 372532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 373532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 37496e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 375532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 376532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 3771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *gv = 3781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(TheModule, Array->getType(), false, 3791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::AppendingLinkage, Array, 3801c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.global.annotations"); 381532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 382532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 383532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 384d46f98573ba104eda102dd3224b2dca69f1c6336John McCallllvm::GlobalValue::LinkageTypes 385d46f98573ba104eda102dd3224b2dca69f1c6336John McCallCodeGenModule::getFunctionLinkage(const FunctionDecl *D) { 38690e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); 3877c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 388f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_Internal) 389d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::InternalLinkage; 390f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 391f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<DLLExportAttr>()) 392d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::DLLExportLinkage; 393f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 394f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<WeakAttr>()) 395d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::WeakAnyLinkage; 396f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 397f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 398f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition somewhere else, so we can use available_externally linkage. 399f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_C99Inline) 400fd0f89d3d7e4220327abdec1cb115474d70219dcFariborz Jahanian return llvm::Function::AvailableExternallyLinkage; 401f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 402f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C++, the compiler has to emit a definition in every translation unit 403f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // that references the function. We should use linkonce_odr because 404f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // a) if all references in this translation unit are optimized away, we 405f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 406f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 407f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition is dependable. 408f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 409142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext 410142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian ? llvm::Function::LinkOnceODRLinkage 411142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian : llvm::Function::InternalLinkage; 412f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 413f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // An explicit instantiation of a template has weak linkage, since 414f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // explicit instantiations can occur in multiple translation units 415f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // and must all be equivalent. However, we are not allowed to 416f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // throw away these explicit instantiations. 417f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_ExplicitTemplateInstantiation) 418142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext 419142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian ? llvm::Function::WeakODRLinkage 420142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian : llvm::Function::InternalLinkage; 421f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 422f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // Otherwise, we have strong external linkage. 423f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner assert(Linkage == GVA_StrongExternal); 424f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner return llvm::Function::ExternalLinkage; 425d46f98573ba104eda102dd3224b2dca69f1c6336John McCall} 426d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 427d46f98573ba104eda102dd3224b2dca69f1c6336John McCall 428d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// SetFunctionDefinitionAttributes - Set attributes for a global. 429d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// 430d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// FIXME: This is currently only done for aliases and functions, but not for 431d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// variables (these details are set in EmitGlobalVarDefinition for variables). 432d46f98573ba104eda102dd3224b2dca69f1c6336John McCallvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 433d46f98573ba104eda102dd3224b2dca69f1c6336John McCall llvm::GlobalValue *GV) { 4347c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 435d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 436d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 4377dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 4381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 4397dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 440ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 441761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 442ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 443761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 444ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 445ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 446f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 447f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4487c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 4497c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 45074ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 4511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 452af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 45340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<AlwaysInlineAttr>()) 454af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 4551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 456dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar if (D->hasAttr<NakedAttr>()) 457dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar F->addFnAttr(llvm::Attribute::Naked); 458dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar 4591feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 46081ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 461f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 462c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) 463c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola F->setUnnamedAddr(true); 464c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola 465fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson if (Features.getStackProtectorMode() == LangOptions::SSPOn) 466fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 467fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson else if (Features.getStackProtectorMode() == LangOptions::SSPReq) 468fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 469fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 470cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); 471cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt if (alignment) 472cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt F->setAlignment(alignment); 473cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt 474fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 475bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 476bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 477f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 478f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 4807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 481934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) 482934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson setGlobalVisibility(GV, ND); 4831fb0caaa7bef765b85972274e3b434af2572c141John McCall else 4841fb0caaa7bef765b85972274e3b434af2572c141John McCall GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 4857c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 48640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 4877c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 4887c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 48940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 4907c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 49182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 49282d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); 4937c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 4947c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4950e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 4960e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 4970e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 4980e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 4990e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 5007c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5017c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 5027c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5030e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 504f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 505f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 506b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlssonvoid CodeGenModule::SetFunctionAttributes(GlobalDecl GD, 507c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 508c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 509b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); 510b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson 511c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 512b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); 5131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5147c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 5157c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 5161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 51740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 5187c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 5191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 52040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<WeakImportAttr>()) { 5217c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 5221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 5237c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 5247c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 5251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 526af14603ca61757cf4361b583b45639a04c57e651John McCall 527af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = FD->getLinkageAndVisibility(); 528af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() == ExternalLinkage && LV.visibilityExplicit()) { 529af14603ca61757cf4361b583b45639a04c57e651John McCall F->setVisibility(GetLLVMVisibility(LV.visibility())); 530af14603ca61757cf4361b583b45639a04c57e651John McCall } 5317c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 5327c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 53340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 5347c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 535219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 536219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 5370269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 5381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 5390269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 54035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 5410269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5420269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5430269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 5440269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 545ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 5460269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 5470269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5483c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 5491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 55035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 55135f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 55235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 55335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 5541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 5551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 556a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 55735f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 5581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 559c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 560c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 56196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 5621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 5641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 5650269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 5667db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 5671c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 5680269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5690269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 5700269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5710269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5720269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 57367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 57467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 57567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 576bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 577046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson while (!DeferredDeclsToEmit.empty() || !DeferredVTables.empty()) { 578046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson if (!DeferredVTables.empty()) { 579046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson const CXXRecordDecl *RD = DeferredVTables.back(); 580046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson DeferredVTables.pop_back(); 581046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson getVTables().GenerateClassData(getVTableLinkage(RD), RD); 582bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola continue; 583bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola } 584bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 5852a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 58667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 58767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 588c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // Check to see if we've already emitted this. This is necessary 589c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // for a couple of reasons: first, decls can end up in the 590c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // deferred-decls queue multiple times, and second, decls can end 591c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // up with definitions in unusual ways (e.g. by an extern inline 592c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // function acquiring a strong function redefinition). Just 593c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // ignore these cases. 594c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // 595c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // TODO: That said, looking this up multiple times is very wasteful. 5969a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef Name = getMangledName(D); 597f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *CGRef = GetGlobalValue(Name); 59867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 5991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 60067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 60167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 6021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 603c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // GlobalAlias::isDeclaration() defers to the aliasee, but for our 604c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // purposes an alias counts as a definition. 605c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall if (isa<llvm::GlobalAlias>(CGRef)) 606c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall continue; 607c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall 60867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 60967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 61067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 6115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 6148bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 6151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 6161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// GlobalValue being annotated. The second field is the constant string 6171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// created from the AnnotateAttr's annotation. The third field is a constant 6188bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 6198bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 6208bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6218bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 6228bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 6238bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 6258bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 6268bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 6278bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 6288bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6298bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 6308bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 6313c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); 6321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *anno = llvm::ConstantArray::get(VMContext, 6330032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson AA->getAnnotation(), true); 6340032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *unit = llvm::ConstantArray::get(VMContext, 6350032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson M->getModuleIdentifier(), 6368bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 6378bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6388bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 6398bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 6401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *annoGV = 64195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, anno->getType(), false, 64295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, anno, 64395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GV->getName()); 6448bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 6458bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 64695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, unit->getType(), false, 6471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::PrivateLinkage, unit, 64895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ".str"); 649d3d4e1ee398748468cbaaddb3b0af5953f043803Rafael Espindola unitGV->setUnnamedAddr(true); 6508bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 65157d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 6528bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 6533c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, SBP), 6543c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(annoGV, SBP), 6553c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(unitGV, SBP), 6560032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) 6578bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 65847a434ff3d49e7906eda88e8e8242e4297725b32Owen Anderson return llvm::ConstantStruct::get(VMContext, Fields, 4, false); 6598bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 6608bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 661a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidisbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 66290e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis // Never defer when EmitAllDecls is specified. 66390e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis if (Features.EmitAllDecls) 664a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidis return false; 6650b6bc8bd7a1d2a7d7478d13d78cff94cacad61fcDouglas Gregor 6664ac7c0bb39696e92fd220118fedc484c09a69870Argyrios Kyrtzidis return !getContext().DeclMustBeEmitted(Global); 66773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 66873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 6696a836706c40a31c716952b74785102c90fd6afa7Rafael Espindolallvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { 6706a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const AliasAttr *AA = VD->getAttr<AliasAttr>(); 6716a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola assert(AA && "No alias?"); 6726a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6736a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); 6746a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6756a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // See if there is already something with the target's name in the module. 676f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); 6776a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6786a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::Constant *Aliasee; 6796a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (isa<llvm::FunctionType>(DeclTy)) 6801faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 6811faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 6826a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola else 683f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 6846a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::PointerType::getUnqual(DeclTy), 0); 6856a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (!Entry) { 6866a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); 6876a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola F->setLinkage(llvm::Function::ExternalWeakLinkage); 6886a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.insert(F); 6896a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 6906a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6916a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return Aliasee; 6926a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola} 6936a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 694b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 6954a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 6961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6976a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // Weak references don't produce any output by themselves. 6986a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (Global->hasAttr<WeakRefAttr>()) 6996a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return; 7006a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 701bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 702bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 70340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 704f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return EmitAliasDefinition(GD); 705219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 70667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 7075e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 708754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (FD->getIdentifier()) { 709754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = FD->getName(); 710754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_Block_object_assign") { 711754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl = FD; 712754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_Block_object_dispose") { 713754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl = FD; 714754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 715754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 716754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 71773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 71873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 71973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7200269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 7210269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 722bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 723bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 724754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (VD->getIdentifier()) { 725754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = VD->getName(); 726754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_NSConcreteGlobalBlock") { 727754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl = VD; 728754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_NSConcreteStackBlock") { 729754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl = VD; 730754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 731754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 732754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 733754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 734a9a55c063e9e59c6ab0a6d7a21302660f7bde9f9Douglas Gregor if (VD->isThisDeclarationADefinition() != VarDecl::Definition) 73573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7364c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 7374c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 73867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 73967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 7404357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (!MayDeferGeneration(Global)) { 7414357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Emit the definition if it can't be deferred. 7424357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner EmitGlobalDefinition(GD); 743bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 744bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 745bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall 746bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // If we're deferring emission of a C++ variable with an 747bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer, remember the order in which it appeared in the file. 748bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus && isa<VarDecl>(Global) && 749bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall cast<VarDecl>(Global)->hasInit()) { 750bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); 751bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall CXXGlobalInits.push_back(0); 752bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } 7534357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 7544357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // If the value has already been used, add it directly to the 7554357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit list. 7569a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 7574357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (GetGlobalValue(MangledName)) 7584357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDeclsToEmit.push_back(GD); 7594357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner else { 7604357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 7614357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // first use of the mangled name will cause it to move into 7624357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit. 7634357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDecls[MangledName] = GD; 7644357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner } 7654c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 7664c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 767b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 7684a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 7691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 770cb421fa690da545b58a720abe5f1c49b166dbde7Dan Gohman PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), 7718e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 7728e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 7738e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 77444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 77544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // At -O0, don't generate IR for functions with available_externally 77644eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // linkage. 7777feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor if (CodeGenOpts.OptimizationLevel == 0 && 7787feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor !Function->hasAttr<AlwaysInlineAttr>() && 77944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getFunctionLinkage(Function) 78044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor == llvm::Function::AvailableExternallyLinkage) 78144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return; 78244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor 78344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { 78444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (Method->isVirtual()) 78544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getVTables().EmitThunks(GD); 7867270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson 78744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) 78844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return EmitCXXConstructor(CD, GD.getCtorType()); 7894357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 79044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(Method)) 79144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return EmitCXXDestructor(DD, GD.getDtorType()); 79244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 793b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 794b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalFunctionDefinition(GD); 79544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 796b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 797b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 798b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalVarDefinition(VD); 7994357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 8004357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner assert(0 && "Invalid argument to EmitGlobalDefinition()"); 801bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 802bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 80374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 80474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 80574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 80674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 80774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 80874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 80974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 810f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 811f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMFunction(llvm::StringRef MangledName, 812f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *Ty, 8131faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson GlobalDecl D, bool ForVTable) { 8140558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 815f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 8160558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 8176a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 8186a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); 8196a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (FD && !FD->hasAttr<WeakAttr>()) 8207270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 8216a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8226a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 8236a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 8246a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8250558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 8260558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 8271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8280558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 82996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 8303c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, PTy); 8310558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 8321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 833654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 834654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 835654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 836654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 837784f21121a6c9418ebd86baa6814e36e1176c410John McCall 838784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::FunctionType *FTy; 839784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (isa<llvm::FunctionType>(Ty)) { 840784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = cast<llvm::FunctionType>(Ty); 841784f21121a6c9418ebd86baa6814e36e1176c410John McCall } else { 84215f6765f6efd24bec4ec6f54e282c14193ef4014Benjamin Kramer FTy = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), false); 843654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 844654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 845bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 846784f21121a6c9418ebd86baa6814e36e1176c410John McCall llvm::Function *F = llvm::Function::Create(FTy, 847654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 848f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall MangledName, &getModule()); 849f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(F->getName() == MangledName && "name was uniqued!"); 850654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 851b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetFunctionAttributes(D, F, IsIncompleteFunction); 852654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 85367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 85467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 85567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 856f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 85767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 85867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 85967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 86067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 86167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 862bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall 863bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Otherwise, there are cases we have to worry about where we're 864bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // using a declaration for which we must emit a definition but where 865bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // we might not find a top-level definition: 866bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - member functions defined inline in their classes 867bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - friend functions defined inline in some class 868bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - special member functions with implicit definitions 869bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // If we ever change our AST traversal to walk into class methods, 870bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // this will be unnecessary. 8711faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // 8721faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // We also don't emit a definition for a function if it's going to be an entry 8731faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // in a vtable, unless it's already marked as used. 87401de7a44cea9f77cbcda65faad8edc8b48a3b617Rafael Espindola } else if (getLangOptions().CPlusPlus && D.getDecl()) { 875bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Look for a declaration that's lexically in a record. 876bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall const FunctionDecl *FD = cast<FunctionDecl>(D.getDecl()); 877bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall do { 878bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { 8791faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson if (FD->isImplicit() && !ForVTable) { 880bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall assert(FD->isUsed() && "Sema didn't mark implicit function as used!"); 881a29bf41b8f49578207ce36f6b21ff9bb7ee77babDouglas Gregor DeferredDeclsToEmit.push_back(D.getWithDecl(FD)); 882bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 883bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } else if (FD->isThisDeclarationADefinition()) { 884a29bf41b8f49578207ce36f6b21ff9bb7ee77babDouglas Gregor DeferredDeclsToEmit.push_back(D.getWithDecl(FD)); 885bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 886bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } 8877b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 888bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall FD = FD->getPreviousDeclaration(); 889bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } while (FD); 89067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 8911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 892784f21121a6c9418ebd86baa6814e36e1176c410John McCall // Make sure the result is of the requested type. 893784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (!IsIncompleteFunction) { 894784f21121a6c9418ebd86baa6814e36e1176c410John McCall assert(F->getType()->getElementType() == Ty); 895784f21121a6c9418ebd86baa6814e36e1176c410John McCall return F; 896784f21121a6c9418ebd86baa6814e36e1176c410John McCall } 897784f21121a6c9418ebd86baa6814e36e1176c410John McCall 898784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 899784f21121a6c9418ebd86baa6814e36e1176c410John McCall return llvm::ConstantExpr::getBitCast(F, PTy); 9000558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 9010558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 90274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 90374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 90474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 905b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 9061faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson const llvm::Type *Ty, 9071faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson bool ForVTable) { 90874391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 90974391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 9104a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 911bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 9129a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 9131faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson return GetOrCreateLLVMFunction(MangledName, Ty, GD, ForVTable); 91474391b48b4791cded373683a3baf67314f358d50Chris Lattner} 91577ba708819285931932ecd33691a672bb59d221aEli Friedman 91674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 91774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 91874391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 91974391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 920f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 9211faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false); 92274391b48b4791cded373683a3baf67314f358d50Chris Lattner} 923bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 92420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedmanstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D) { 92588786862424cb2d478516d911709dc19c962af9cJohn McCall if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) 92620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 92720e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman if (Context.getLangOptions().CPlusPlus && 92820e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman Context.getBaseElementType(D->getType())->getAs<RecordType>()) { 92920e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman // FIXME: We should do something fancier here! 93020e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 93120e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 93220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 93320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 93420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 93574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 93674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 93774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 93874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 93974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 94074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 94174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 942f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 943f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMGlobal(llvm::StringRef MangledName, 944f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::PointerType *Ty, 945c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola const VarDecl *D, 946c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola bool UnnamedAddr) { 9473c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 948f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 94999b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 9506a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 9516a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (D && !D->hasAttr<WeakAttr>()) 9527270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 9536a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 9546a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 9556a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 9566a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 957c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola if (UnnamedAddr) 958c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola Entry->setUnnamedAddr(true); 959c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola 96074391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 961570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 9621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 96399b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 9643c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 96599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 9661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 96767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 96867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 96967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 970f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 97167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 97267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 97367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 97467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 97567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 97667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 9771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 9791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 98099b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 981f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 0, MangledName, 0, 98256ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 98349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 98499b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 98574391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 986f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 987f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 98820e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman GV->setConstant(DeclIsConstantGlobal(Context, D)); 98949988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 990110e8e56af30363072c140285961592b0107f789John McCall // Set linkage and visibility in case we never see a definition. 991af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 992af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() != ExternalLinkage) { 99315e310a3b970b64a84cb30f0005bc396b4d978cbJohn McCall // Don't set internal linkage on declarations. 994110e8e56af30363072c140285961592b0107f789John McCall } else { 995110e8e56af30363072c140285961592b0107f789John McCall if (D->hasAttr<DLLImportAttr>()) 996110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::DLLImportLinkage); 997110e8e56af30363072c140285961592b0107f789John McCall else if (D->hasAttr<WeakAttr>() || D->hasAttr<WeakImportAttr>()) 998110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 999110e8e56af30363072c140285961592b0107f789John McCall 1000af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility on a declaration only if it's explicit. 1001af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.visibilityExplicit()) 1002af14603ca61757cf4361b583b45639a04c57e651John McCall GV->setVisibility(GetLLVMVisibility(LV.visibility())); 1003110e8e56af30363072c140285961592b0107f789John McCall } 100456ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 100556ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 100674391b48b4791cded373683a3baf67314f358d50Chris Lattner } 10071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1008f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GV; 100974391b48b4791cded373683a3baf67314f358d50Chris Lattner} 1010eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 1011eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 10123bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlssonllvm::GlobalVariable * 10133bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders CarlssonCodeGenModule::CreateOrReplaceCXXRuntimeVariable(llvm::StringRef Name, 10143bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson const llvm::Type *Ty, 10153bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalValue::LinkageTypes Linkage) { 10163bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name); 10173bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *OldGV = 0; 10183bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10193bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10203bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV) { 10213bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Check if the variable has the right type. 10223bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV->getType()->getElementType() == Ty) 10233bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 10243bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10253bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Because C++ name mangling, the only way we can end up with an already 10263bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // existing global with the same name is if it has been declared extern "C". 102796eaf2992b5955d1470fc9cce7a96e7e1e3b4ea7Anders Carlsson assert(GV->isDeclaration() && "Declaration has wrong type!"); 10283bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV = GV; 10293bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10303bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10313bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Create a new variable. 10323bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV = new llvm::GlobalVariable(getModule(), Ty, /*isConstant=*/true, 10333bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson Linkage, 0, Name); 10343bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10353bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (OldGV) { 10363bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Replace occurrences of the old variable if needed. 10373bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV->takeName(OldGV); 10383bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10393bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (!OldGV->use_empty()) { 10403bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::Constant *NewPtrForOldDecl = 10413bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); 10423bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->replaceAllUsesWith(NewPtrForOldDecl); 10433bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10443bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10453bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->eraseFromParent(); 10463bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10473bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10483bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 10493bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson} 10503bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 105174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 105274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 105374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 105474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 105574391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 105674391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 105774391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 105874391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 105974391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 106074391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 10611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::PointerType *PTy = 106396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 1064f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 10659a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1066f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMGlobal(MangledName, PTy, D); 106774391b48b4791cded373683a3baf67314f358d50Chris Lattner} 10683f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 106974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 107074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 107174391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 107274391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 1073f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 1074c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0, 1075c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola true); 1076bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1077bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 107803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 107903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 108003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 10817520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 10827520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 10837520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 10847520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 10859a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1086f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (!GetGlobalValue(MangledName)) { 1087555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 108803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 10897520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 10907520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 10917520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 10927520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 109303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 109403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 109503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 10966fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregorvoid CodeGenModule::EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired) { 10976fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor if (DefinitionRequired) 10986fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor getVTables().GenerateClassData(getVTableLinkage(Class), Class); 10996fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor} 11006fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor 11014b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregorllvm::GlobalVariable::LinkageTypes 1102046c294a43024874ff35656c6e785b64e72f1f36Anders CarlssonCodeGenModule::getVTableLinkage(const CXXRecordDecl *RD) { 1103dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (RD->isInAnonymousNamespace() || !RD->hasLinkage()) 1104dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::InternalLinkage; 1105dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1106dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (const CXXMethodDecl *KeyFunction 1107dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor = RD->getASTContext().getKeyFunction(RD)) { 1108dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // If this class has a key function, use that to determine the linkage of 1109dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // the vtable. 11104b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor const FunctionDecl *Def = 0; 111106a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (KeyFunction->hasBody(Def)) 11124b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor KeyFunction = cast<CXXMethodDecl>(Def); 1113dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 11144b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor switch (KeyFunction->getTemplateSpecializationKind()) { 11154b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_Undeclared: 11164b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitSpecialization: 11176d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // When compiling with optimizations turned on, we emit all vtables, 11186d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // even if the key function is not defined in the current translation 11196d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // unit. If this is the case, use available_externally linkage. 11206d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson if (!Def && CodeGenOpts.OptimizationLevel) 11216d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson return llvm::GlobalVariable::AvailableExternallyLinkage; 11226d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson 11234b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->isInlined()) 1124142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1125142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1126142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 11274b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11284b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::ExternalLinkage; 11294b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11304b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ImplicitInstantiation: 1131142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1132142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1133142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1134f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 11354b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDefinition: 1136142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1137142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::WeakODRLinkage : 1138142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1139f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 11404b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 11414b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // FIXME: Use available_externally linkage. However, this currently 11424b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // breaks LLVM's build due to undefined symbols. 11434b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1144142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1145142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1146142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 11474b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 1148dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor } 1149dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 115053bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian if (Context.getLangOptions().AppleKext) 115153bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::Function::InternalLinkage; 115253bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian 1153dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor switch (RD->getTemplateSpecializationKind()) { 1154dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_Undeclared: 1155dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitSpecialization: 1156dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ImplicitInstantiation: 1157dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // FIXME: Use available_externally linkage. However, this currently 1158dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // breaks LLVM's build due to undefined symbols. 1159dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1160142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDeclaration: 116153bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 1162142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian 1163142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDefinition: 116453bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 11654b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 11664b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11674b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // Silence GCC warning. 116853bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 11694b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor} 11704b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 1171687cc4a850b59116efee061018f0d8df50728b82Ken DyckCharUnits CodeGenModule::GetTargetTypeStoreSize(const llvm::Type *Ty) const { 117206f486ecd05bd6788da97c39164c1903a084c26dKen Dyck return Context.toCharUnitsFromBits( 117306f486ecd05bd6788da97c39164c1903a084c26dKen Dyck TheTargetData.getTypeStoreSizeInBits(Ty)); 1174687cc4a850b59116efee061018f0d8df50728b82Ken Dyck} 1175687cc4a850b59116efee061018f0d8df50728b82Ken Dyck 1176bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 11778f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 117877ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 11796c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman bool NonConstInit = false; 11801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 118131310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl const Expr *InitExpr = D->getAnyInitializer(); 11823bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson 11833bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson if (!InitExpr) { 1184cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 118503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 118603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 118703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 118803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 118903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 119003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 119103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 119203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 119303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 1194b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 119577ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 1196c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor Init = EmitConstantExpr(InitExpr, D->getType()); 11976e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 11983bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson QualType T = InitExpr->getType(); 1199c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor if (D->getType()->isReferenceType()) 1200c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor T = D->getType(); 1201c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor 120289ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 120389ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 12046c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman NonConstInit = true; 120589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 120689ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 120789ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 120889ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 1209bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } else { 1210bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // We don't need an initializer, so remove the entry for the delayed 1211bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer position (just in case this entry was delayed). 1212bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus) 1213bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition.erase(D); 12146e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 12158f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 12168e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 12172d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 1218570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 12191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1220570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 1221570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 12229d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 12239d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 12249d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 1225570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 1226570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 12271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1228570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 1229570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 12301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1231570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 1232570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 1233570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 1234570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 1235570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 1236570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 1237570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 1238570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 1239570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 1240570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 1241570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 1242570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { 12431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1244f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // Move the old entry aside so that we'll create a new one. 1245f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Entry->setName(llvm::StringRef()); 1246232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 1247570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 1248570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 12490558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 125077ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 12511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 12523c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 1253570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 125477ba708819285931932ecd33691a672bb59d221aEli Friedman 125577ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 1256570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 125777ba708819285931932ecd33691a672bb59d221aEli Friedman } 125877ba708819285931932ecd33691a672bb59d221aEli Friedman 125940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 12608bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 12618bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 1262f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 12638bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 12648bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 126588a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 1266e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 1267e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 1268e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 12696c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman if (!NonConstInit && DeclIsConstantGlobal(Context, D)) 1270e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 12711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12728b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); 1273354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 127488a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 1275354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage = 1276354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GetLLVMLinkageVarDefinition(D, GV); 1277354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setLinkage(Linkage); 1278354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian if (Linkage == llvm::GlobalVariable::CommonLinkage) 1279354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // common vars aren't constant even if declared const. 1280354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setConstant(false); 1281354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1282354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian SetCommonAttributes(D, GV); 1283354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 12843030eb82593097502469a8b3fc26112c79c75605John McCall // Emit the initializer function if necessary. 12853030eb82593097502469a8b3fc26112c79c75605John McCall if (NonConstInit) 12863030eb82593097502469a8b3fc26112c79c75605John McCall EmitCXXGlobalVarDeclInitFunc(D, GV); 12873030eb82593097502469a8b3fc26112c79c75605John McCall 1288354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // Emit global variable debug information. 1289aa11289f754d220c9c155b68a4f84cdcfcefef6aDevang Patel if (CGDebugInfo *DI = getModuleDebugInfo()) { 1290354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->setLocation(D->getLocation()); 1291354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->EmitGlobalVariable(GV, D); 1292354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian } 1293354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian} 1294354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1295354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanianllvm::GlobalValue::LinkageTypes 1296354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz JahanianCodeGenModule::GetLLVMLinkageVarDefinition(const VarDecl *D, 1297354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalVariable *GV) { 129890e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); 1299a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 1300354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::InternalLinkage; 130140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1302354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLImportLinkage; 130340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1304354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLExportLinkage; 1305e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1306e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1307354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 1308e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1309354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 13108f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor } else if (Linkage == GVA_TemplateInstantiation || 13118f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor Linkage == GVA_ExplicitTemplateInstantiation) 13128f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor // FIXME: It seems like we can provide more specific linkage here 13138f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor // (LinkOnceODR, WeakODR). 1314354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 1315a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher else if (!getLangOptions().CPlusPlus && 1316a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher ((!CodeGenOpts.NoCommon && !D->getAttr<NoCommonAttr>()) || 1317a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher D->getAttr<CommonAttr>()) && 1318309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 131991f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher !D->getAttr<SectionAttr>() && !D->isThreadSpecified()) { 132091f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher // Thread local vars aren't considered common linkage. 1321354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::CommonLinkage; 1322686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 1323354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::ExternalLinkage; 132488a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 13255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1326bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1327bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1328bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1329bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1330bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1331bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1332bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1333bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1334bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1335bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1336bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1337bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1338bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1339bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 13401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1341bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 1342bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 1343bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1344bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1345dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer UI != E; ) { 1346bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 1347dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::Value::use_iterator I = UI++; // Increment before the CI is erased. 1348dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*I); 13498670cd3ea4dfbf86caacd270ec2441e9949bbb6aGabor Greif if (!CI) continue; // FIXME: when we allow Invoke, just do CallSite CS(*I) 135035db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif llvm::CallSite CS(CI); 1351dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer if (!CI || !CS.isCallee(I)) continue; 13521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1353bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1354bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1355bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1356bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1357bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1358bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1359bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1360bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1361bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1362bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1363bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1364bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 136535db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif if (CS.arg_size() == ArgNo || 136635db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif CS.getArgument(ArgNo)->getType() != AI->getType()) { 1367bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1368bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1369bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1370bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1371bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1372bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 13731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1374bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1375bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 13766ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif ArgList.append(CS.arg_begin(), CS.arg_begin() + ArgNo); 1377bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 1378bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 1379bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1380ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1381bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 1382bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 1383ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1384bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1385bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 138600549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 138700549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 13883b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1389c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner // Copy debug location attached to CI. 1390c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner if (!CI->getDebugLoc().isUnknown()) 1391c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner NewCall->setDebugLoc(CI->getDebugLoc()); 1392bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1393bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1394bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1395bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1396bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1397b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 1398b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 1399d26bc76c98006609002d9930f8840490e88ac5b5John McCall 14001f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall // Compute the function info and LLVM type. 1401d26bc76c98006609002d9930f8840490e88ac5b5John McCall const CGFunctionInfo &FI = getTypes().getFunctionInfo(GD); 14021f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall bool variadic = false; 14031f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall if (const FunctionProtoType *fpt = D->getType()->getAs<FunctionProtoType>()) 14041f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall variadic = fpt->isVariadic(); 14051f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall const llvm::FunctionType *Ty = getTypes().GetFunctionType(FI, variadic, false); 1406d26bc76c98006609002d9930f8840490e88ac5b5John McCall 14079fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1408b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 14091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14100558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 14110558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 14120558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 14130558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 14140558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 14151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14170558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1418bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 14191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 142042745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1421bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 14220558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 142334809507232bc4c3c4840c7d092c7440219fddafChris Lattner 142462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 142562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 142662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 142762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 142862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 142962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 1430f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // (e.g. "int f(int x)"). Move the old function aside so that it 1431f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // doesn't interfere with GetAddrOfFunction. 1432f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall OldFn->setName(llvm::StringRef()); 1433b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 14341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1435bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1436bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1437bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 14389fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1439bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 14409fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 14419fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 14421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 144362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1444bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 14451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 14463c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1447bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1448bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 14491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 145062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1451bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 14521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14530558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1454bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 14551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1456112c967bd5c862a0f5d7913aa06700c048807db8John McCall // We need to set linkage and visibility on the function before 1457112c967bd5c862a0f5d7913aa06700c048807db8John McCall // generating code for it because various parts of IR generation 1458112c967bd5c862a0f5d7913aa06700c048807db8John McCall // want to propagate this information down (e.g. to local static 1459112c967bd5c862a0f5d7913aa06700c048807db8John McCall // declarations). 14600558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 14618b2423361648c39a7d8a3c5e8129e12006deac32John McCall setFunctionLinkage(D, Fn); 1462bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1463112c967bd5c862a0f5d7913aa06700c048807db8John McCall // FIXME: this is redundant with part of SetFunctionDefinitionAttributes 14640ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(Fn, D); 1465112c967bd5c862a0f5d7913aa06700c048807db8John McCall 1466d26bc76c98006609002d9930f8840490e88ac5b5John McCall CodeGenFunction(*this).GenerateCode(D, Fn, FI); 14676379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 14687c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 14697c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 14701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 147140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1472219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 147340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1474219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1475bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1476bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1477f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallvoid CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { 1478f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 147940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1480bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1481bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 14829a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 1483f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1484f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // If there is a definition in the module, then it wins over the alias. 1485f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // This is dubious, but allow it to be safe. Just ignore the alias. 1486f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 1487f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (Entry && !Entry->isDeclaration()) 1488f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return; 14891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1490f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1491bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1492bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1493bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1494bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1495bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 14961faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 14971faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 1498bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1499f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 150096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1501bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1502bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 15031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1504bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1505bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1506bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 15071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1508bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1509f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(Entry->isDeclaration()); 1510f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1511bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1512bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1513bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1514bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1515bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1516bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1517bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1518f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GA->takeName(Entry); 15191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15203c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1521bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1522bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1523f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall } else { 15249a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson GA->setName(MangledName); 1525bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 15261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15277c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 15287c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 15297c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 153040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 15317c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 15327c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 153306a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (FD->hasBody()) 15347c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 15357c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 15367c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 15377c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 15381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 153911e8ce7380856abee188b237c2600272df2ed09dRafael Espindola D->hasAttr<WeakRefAttr>() || 154040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) { 15417c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 15427c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 15437c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 15447c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1545bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1546bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1547b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1548b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 154934771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbarllvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, 155034771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar unsigned BuiltinID) { 15513e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 15521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 15533e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 15541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15553e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 15563e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 15573e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 15583e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 15591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::FunctionType *Ty = 1561386ca78d0b03b1fb519e60d1a14cd12a220364a6Eli Friedman cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); 1562bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 15631faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD), /*ForVTable=*/false); 1564bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1565bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 15667acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 15677acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 15687acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 15697acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 15707acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1571bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 15721d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 15731d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 15741d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 157570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 15761d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 15771d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 15782f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer llvm::StringRef String = Literal->getString(); 15792f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer unsigned NumBytes = String.size(); 15801d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1581f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1582f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1583f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 15842f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer return Map.GetOrCreateValue(String); 1585f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1586f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 15871d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 15881d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); 15892f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer const UTF8 *FromPtr = (UTF8 *)String.data(); 15901d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 15911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1592e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian (void)ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 1593e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian &ToPtr, ToPtr + NumBytes, 1594e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian strictConversion); 15951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 159670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 15971d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 159870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 159970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 160070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 160170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 160270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 160370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 160470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 160570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 160670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 160770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 160870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 160970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 161070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 161170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 161270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 161370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 161470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1615434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1616434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1617434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 161870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 16191d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 162070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); 16211d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 16221d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 16231d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 16241d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 16251d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 16261d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 16271d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 16281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 162970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 163070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 16311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16321d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 16331d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 16341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16350032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 16360032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 16373e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 16381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16399d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1640c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1641c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 164296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 16431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 16449d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 16453e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 16463e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 16473c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1648c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 16491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1650e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 16513e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 16521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::StructType *STy = 1653e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1654e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 16555add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 165644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1657c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 16585add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 16591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1660c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 16613e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 16621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 16635add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 16645add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1665c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 16660032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1667a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 166895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1669278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner bool isConstant; 1670a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1671278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 167295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1673278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // Note: -fwritable-strings doesn't make unicode CFStrings writable, but 1674278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // does make plain ascii ones writable. 1675278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = true; 1676a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 1677584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // FIXME: With OS X ld 123.2 (xcode 4) and LTO we would get a linker error 1678584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // when using private linkage. It is not clear if this is a bug in ld 1679584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // or a reasonable new restriction. 1680dc0f137295bc7ec5b231ff1842388f149f43c0c8Rafael Espindola Linkage = llvm::GlobalValue::LinkerPrivateLinkage; 1681278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = !Features.WritableStrings; 1682a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1683278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 16841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 1685278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 1686278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner ".str"); 1687b266a1fce09ab4ee7033268199509aacfbef056aRafael Espindola GV->setUnnamedAddr(true); 1688a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 16894da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 16904da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck GV->setAlignment(Align.getQuantity()); 1691a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 16925add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 16935add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1694c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1695c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 16965add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 16971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1698c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 169908e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 17001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 17011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 170295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 17038e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 17048e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 17051d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 17061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17070c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1708c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 170945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 171033e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanianllvm::Constant * 17114c73307c74764ba99e1379677fe92af72f676531Fariborz JahanianCodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) { 17122bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian unsigned StringLength = 0; 17132bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isUTF16 = false; 17142bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::StringMapEntry<llvm::Constant*> &Entry = 17152bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GetConstantCFStringEntry(CFConstantStringMap, Literal, 17162bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian getTargetData().isLittleEndian(), 17172bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isUTF16, StringLength); 17182bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17192bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (llvm::Constant *C = Entry.getValue()) 17202bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return C; 17212bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17222bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zero = 17232bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 17242bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zeros[] = { Zero, Zero }; 17252bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 1726ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian // If we don't already have it, get _NSConstantStringClassReference. 17274c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (!ConstantStringClassRef) { 17284c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string StringClass(getLangOptions().ObjCConstantStringClass); 17292bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 17302bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Ty = llvm::ArrayType::get(Ty, 0); 17314c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::Constant *GV; 17324c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (StringClass.empty()) 17334c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian GV = CreateRuntimeVariable(Ty, 17344c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Features.ObjCNonFragileABI ? 17354c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian "OBJC_CLASS_$_NSConstantString" : 17364c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian "_NSConstantStringClassReference"); 17374c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian else { 17384c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string str; 17394c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (Features.ObjCNonFragileABI) 17404c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian str = "OBJC_CLASS_$_" + StringClass; 17414c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian else 17424c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian str = "_" + StringClass + "ClassReference"; 17434c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian GV = CreateRuntimeVariable(Ty, str); 17444c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian } 17452bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Decay array -> ptr 17464c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian ConstantStringClassRef = 17474c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 17482bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 17492bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17502bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian QualType NSTy = getContext().getNSConstantStringType(); 17512bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17522bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::StructType *STy = 17532bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian cast<llvm::StructType>(getTypes().ConvertType(NSTy)); 17542bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17552bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian std::vector<llvm::Constant*> Fields(3); 17562bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17572bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Class pointer. 17584c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Fields[0] = ConstantStringClassRef; 17592bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17602bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String pointer. 17612bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 17622bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17632bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage; 17642bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isConstant; 17652bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (isUTF16) { 17662bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME: why do utf strings get "_" labels instead of "L" labels? 17672bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Linkage = llvm::GlobalValue::InternalLinkage; 17682bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Note: -fwritable-strings doesn't make unicode NSStrings writable, but 17692bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // does make plain ascii ones writable. 17702bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isConstant = true; 17712bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } else { 17722bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Linkage = llvm::GlobalValue::PrivateLinkage; 17732bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isConstant = !Features.WritableStrings; 17742bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 17752bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17762bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable *GV = 17772bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 17782bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian ".str"); 1779803d307a5385059b1a84dfe9706ab158c80a20dcRafael Espindola GV->setUnnamedAddr(true); 17802bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (isUTF16) { 17812bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 17822bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setAlignment(Align.getQuantity()); 17832bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 17842bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 17852bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17862bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String length. 17872bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 17882bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[2] = llvm::ConstantInt::get(Ty, StringLength); 17892bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17902bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // The struct. 17912bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian C = llvm::ConstantStruct::get(STy, Fields); 17922bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 17932bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable::PrivateLinkage, C, 17942bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian "_unnamed_nsstring_"); 17952bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME. Fix section. 1796ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian if (const char *Sect = 1797ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian Features.ObjCNonFragileABI 1798ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian ? getContext().Target.getNSStringNonFragileABISection() 1799ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian : getContext().Target.getNSStringSection()) 18002bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setSection(Sect); 18012bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Entry.setValue(GV); 18022bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18032bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return GV; 180433e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian} 180533e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian 18066143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 18071e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 18086143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 18093b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck const ASTContext &Context = getContext(); 18101e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 18113b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck Context.getAsConstantArrayType(E->getType()); 18121e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 18131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1814dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 18151e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 18161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1817dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 18183b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck RealLen *= Context.Target.getWCharWidth() / Context.getCharWidth(); 18191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18202f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer std::string Str = E->getString().str(); 18211e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 18221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18231e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 18241e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 18251e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 18266143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 18276143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 18286143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 18296143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 18306143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 18317eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 18327eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); 18337eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman if (S->isWide()) { 18347eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Type *DestTy = 18357eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); 18367eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman C = llvm::ConstantExpr::getBitCast(C, DestTy); 18377eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 18387eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman return C; 18396143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 18406143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1841eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1842eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1843eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1844eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1845eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1846eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1847a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1848a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1849eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1850eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1851eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1852a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 18539de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramerstatic llvm::Constant *GenerateStringLiteral(llvm::StringRef str, 185445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 18555fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 18565fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 18576143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 18580032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 18590032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 18601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 186145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 18621257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalVariable *GV = 18631257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 18641257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalValue::PrivateLinkage, 18651257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola C, GlobalName); 18661257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola GV->setUnnamedAddr(true); 18671257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola return GV; 186845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 186945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 18706143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 18716143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 18726143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 18736143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 18746143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 18756143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 18766143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 18776143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 18789de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramerllvm::Constant *CodeGenModule::GetAddrOfConstantString(llvm::StringRef Str, 18795fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 18808e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 18818e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 18828e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 18838e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 188495b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 18858e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 18868e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 18878e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 18889de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer return GenerateStringLiteral(Str, false, *this, GlobalName); 18891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StringMapEntry<llvm::Constant *> &Entry = 18919de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer ConstantStringMap.GetOrCreateValue(Str); 189245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 189345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1894eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 189545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 189645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 18979de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer llvm::Constant *C = GenerateStringLiteral(Str, true, *this, GlobalName); 189845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 189945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 190045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 19016143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 19026143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 19039de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer/// array containing the literal and a terminating '\0' 19046143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 19059de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramerllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &Str, 19065fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 19079de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer llvm::StringRef StrWithNull(Str.c_str(), Str.size() + 1); 19089de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer return GetAddrOfConstantString(StrWithNull, GlobalName); 19096143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 191041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1911af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1912af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 19131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 1914af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 19151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 191617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 1917af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 19181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1919af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1920af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1921af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1922af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1923af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1924af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1925af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1926af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1927af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 192817945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 1929fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1930fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1931af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 193217945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 1933fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1934fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1935af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1936af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1937af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1938af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1939109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// EmitObjCIvarInitializations - Emit information for ivar initialization 1940109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// for an implementation. 1941109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanianvoid CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { 1942827bbcc8a9115782693b21030a45378abe5c1862David Chisnall if (D->getNumIvarInitializers() == 0) 1943109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian return; 1944109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian DeclContext* DC = const_cast<DeclContext*>(dyn_cast<DeclContext>(D)); 1945109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian assert(DC && "EmitObjCIvarInitializations - null DeclContext"); 1946109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); 1947109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 1948109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *DTORMethod = ObjCMethodDecl::Create(getContext(), 1949109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 1950109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 1951109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().VoidTy, 0, 19523fe104154dd2e8ffb351142d74f308938b5c99bfFariborz Jahanian DC, true, false, true, false, 1953109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 1954109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(DTORMethod); 1955109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); 1956109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1957109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian II = &getContext().Idents.get(".cxx_construct"); 1958109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian cxxSelector = getContext().Selectors.getSelector(0, &II); 1959109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian // The constructor returns 'self'. 1960109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), 1961109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 1962109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 1963109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().getObjCIdType(), 0, 19643fe104154dd2e8ffb351142d74f308938b5c99bfFariborz Jahanian DC, true, false, true, false, 1965109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 1966109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(CTORMethod); 1967109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); 1968109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1969109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1970109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian} 1971109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 197291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 1973984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 197417945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 1975984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 1976984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 1977984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 1978984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 197991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 198091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 1981f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 1982f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 198391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 198491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 198591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 198691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 198717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 198891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 198991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 199091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 199191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 199241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 199341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 199441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 199541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 199641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 199741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 199841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 199941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 200016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 200116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 200216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 20031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 200441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 2005293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 20062b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 200741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 200816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 200916e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 201016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 20111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2012555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 2013555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 2014555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 201541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 2016555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 201741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 201841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 201995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 202041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 2021984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 202241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 20239cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 20249d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 20259cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 2026dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 2027127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 2028127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 2029018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 20309cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 203195d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 20321fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 20331fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 20341fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 20351fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 203695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 203795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 203827ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 203927ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 204027ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 204136674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 204236674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 204336674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 204436674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 204536674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 204695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 20471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 204838e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 204941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 205041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 2051b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 205241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 2053000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 2054000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian case Decl::ObjCCategory: { 2055000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D); 2056000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (CD->IsClassExtension() && CD->hasSynthBitfield()) 2057000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(CD->getClassInterface()); 2058000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian break; 2059000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian } 2060000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 2061285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 206241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 2063b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 206441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 206541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 206641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 2067af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 2068af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 206941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 207041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 207141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 2072af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 2073af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 2074000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (Features.ObjCNonFragileABI2 && OMD->hasSynthBitfield()) 2075000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(OMD->getClassInterface()); 2076af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 2077109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian EmitObjCIvarInitializations(OMD); 2078af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 207941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 20801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 208141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 208241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 208341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 20846fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 208541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 208641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 208741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 20881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 2089305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 209041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 209141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 209291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 209391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 209441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 209541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 209641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 209741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 20988d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer llvm::StringRef AsmString = AD->getAsmString()->getString(); 20991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 210041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 210141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 210241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 210341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 21048d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 210541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 210641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 21071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 21081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 2109f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 2110f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 2111f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 211241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 211341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 211441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 2115744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2116744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Turns the given pointer into a constant. 2117744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, 2118744016dde06fcffd50931e94a98c850f8b12cd87John McCall const void *Ptr) { 2119744016dde06fcffd50931e94a98c850f8b12cd87John McCall uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); 2120744016dde06fcffd50931e94a98c850f8b12cd87John McCall const llvm::Type *i64 = llvm::Type::getInt64Ty(Context); 2121744016dde06fcffd50931e94a98c850f8b12cd87John McCall return llvm::ConstantInt::get(i64, PtrInt); 2122744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2123744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2124744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic void EmitGlobalDeclMetadata(CodeGenModule &CGM, 2125744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *&GlobalMetadata, 2126744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl D, 2127744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr) { 2128744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (!GlobalMetadata) 2129744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata = 2130744016dde06fcffd50931e94a98c850f8b12cd87John McCall CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); 2131744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2132744016dde06fcffd50931e94a98c850f8b12cd87John McCall // TODO: should we report variant information for ctors/dtors? 2133744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Ops[] = { 2134744016dde06fcffd50931e94a98c850f8b12cd87John McCall Addr, 2135744016dde06fcffd50931e94a98c850f8b12cd87John McCall GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) 2136744016dde06fcffd50931e94a98c850f8b12cd87John McCall }; 2137744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops, 2)); 2138744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2139744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2140744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes associating all the global values in the 2141744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// current module with the Decls they came from. This is useful for 2142744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// projects using IR gen as a subroutine. 2143744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// 2144744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Since there's currently no way to associate an MDNode directly 2145744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with an llvm::GlobalValue, we create a global named metadata 2146744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with the name 'clang.global.decl.ptrs'. 2147744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenModule::EmitDeclMetadata() { 2148744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2149744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2150744016dde06fcffd50931e94a98c850f8b12cd87John McCall // StaticLocalDeclMap 2151744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<GlobalDecl,llvm::StringRef>::iterator 2152744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = MangledDeclNames.begin(), E = MangledDeclNames.end(); 2153744016dde06fcffd50931e94a98c850f8b12cd87John McCall I != E; ++I) { 2154744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); 2155744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); 2156744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2157744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2158744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2159744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes for all the local variables in the current 2160744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// function. 2161744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenFunction::EmitDeclMetadata() { 2162744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (LocalDeclMap.empty()) return; 2163744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2164744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::LLVMContext &Context = getLLVMContext(); 2165744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2166744016dde06fcffd50931e94a98c850f8b12cd87John McCall // Find the unique metadata ID for this name. 2167744016dde06fcffd50931e94a98c850f8b12cd87John McCall unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); 2168744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2169744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2170744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2171744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator 2172744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { 2173744016dde06fcffd50931e94a98c850f8b12cd87John McCall const Decl *D = I->first; 2174744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Addr = I->second; 2175744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2176744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { 2177744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); 2178744016dde06fcffd50931e94a98c850f8b12cd87John McCall Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, &DAddr, 1)); 2179744016dde06fcffd50931e94a98c850f8b12cd87John McCall } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { 2180744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); 2181744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); 2182744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2183744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2184744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2185673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2186673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@name Custom Runtime Function Interfaces 2187673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@{ 2188673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// 2189673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// FIXME: These can be eliminated once we can have clients just get the required 2190673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// AST nodes from the builtin tables. 2191673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2192673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectDispose() { 2193673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectDispose) 2194673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose; 2195673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2196754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2197754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectDisposeDecl) { 2198754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectDispose = GetAddrOfFunction( 2199754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl, 2200754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectDisposeDecl)); 2201754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2202754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2203754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2204673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::FunctionType *FTy; 2205673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar std::vector<const llvm::Type*> ArgTys; 2206673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); 2207d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall ArgTys.push_back(Int8PtrTy); 2208673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); 2209673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar FTy = llvm::FunctionType::get(ResultType, ArgTys, false); 2210673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose = 2211673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CreateRuntimeFunction(FTy, "_Block_object_dispose"); 2212673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2213673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2214673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectAssign() { 2215673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectAssign) 2216673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign; 2217673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2218754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2219754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectAssignDecl) { 2220754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectAssign = GetAddrOfFunction( 2221754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl, 2222754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectAssignDecl)); 2223754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2224754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2225754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2226673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::FunctionType *FTy; 2227673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar std::vector<const llvm::Type*> ArgTys; 2228673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); 2229d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall ArgTys.push_back(Int8PtrTy); 2230d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall ArgTys.push_back(Int8PtrTy); 2231673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); 2232673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar FTy = llvm::FunctionType::get(ResultType, ArgTys, false); 2233673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign = 2234673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CreateRuntimeFunction(FTy, "_Block_object_assign"); 2235673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2236673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2237673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteGlobalBlock() { 2238673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteGlobalBlock) 2239673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteGlobalBlock; 2240754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2241754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2242754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteGlobalBlockDecl) { 2243754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteGlobalBlock = GetAddrOfGlobalVar( 2244754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl, 2245754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteGlobalBlockDecl->getType())); 2246754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2247754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2248754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2249d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall return NSConcreteGlobalBlock = 2250d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall CreateRuntimeVariable(Int8PtrTy, "_NSConcreteGlobalBlock"); 2251673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2252673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2253673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteStackBlock() { 2254673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteStackBlock) 2255673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteStackBlock; 2256754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2257754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2258754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteStackBlockDecl) { 2259754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteStackBlock = GetAddrOfGlobalVar( 2260754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl, 2261754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteStackBlockDecl->getType())); 2262754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2263754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2264754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2265d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall return NSConcreteStackBlock = 2266d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall CreateRuntimeVariable(Int8PtrTy, "_NSConcreteStackBlock"); 2267673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2268673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2269673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@} 2270