CodeGenModule.cpp revision d16c2cf1cafa413709aa487cbbd5dc392f1ba1ff
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" 4020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 416ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif#include "llvm/Support/CallSite.h" 4278f7ece00e2ddfb64d4ed72a7be770b5b9b805e3Chris Lattner#include "llvm/Support/ErrorHandling.h" 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 46f16aa103d3afd42fbca2ab346f191bf745cec092John McCallstatic CGCXXABI &createCXXABI(CodeGenModule &CGM) { 47f16aa103d3afd42fbca2ab346f191bf745cec092John McCall switch (CGM.getContext().Target.getCXXABI()) { 48f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_ARM: return *CreateARMCXXABI(CGM); 49f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_Itanium: return *CreateItaniumCXXABI(CGM); 50f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_Microsoft: return *CreateMicrosoftCXXABI(CGM); 51f16aa103d3afd42fbca2ab346f191bf745cec092John McCall } 52f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 53f16aa103d3afd42fbca2ab346f191bf745cec092John McCall llvm_unreachable("invalid C++ ABI kind"); 54f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return *CreateItaniumCXXABI(CGM); 55f16aa103d3afd42fbca2ab346f191bf745cec092John McCall} 56f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 582811ccf48d6d898c42cc4cfad37abedb36236d20Chandler CarruthCodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, 59468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall llvm::Module &M, const llvm::TargetData &TD, 60468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall Diagnostic &diags) 61d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall : Context(C), Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), 62468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags), 63f16aa103d3afd42fbca2ab346f191bf745cec092John McCall ABI(createCXXABI(*this)), 64f16aa103d3afd42fbca2ab346f191bf745cec092John McCall Types(C, M, TD, getTargetCodeGenInfo().getABIInfo(), ABI), 653d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman TBAA(0), 66f16aa103d3afd42fbca2ab346f191bf745cec092John McCall VTables(*this), Runtime(0), 674c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian CFConstantStringClassRef(0), ConstantStringClassRef(0), 68673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar VMContext(M.getContext()), 69754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl(0), NSConcreteStackBlockDecl(0), 70673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar NSConcreteGlobalBlock(0), NSConcreteStackBlock(0), 71754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl(0), BlockObjectDisposeDecl(0), 72d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall BlockObjectAssign(0), BlockObjectDispose(0), 73d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall BlockDescriptorType(0), GenericBlockLiteralType(0) { 743c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner if (!Features.ObjC1) 753c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = 0; 763c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (!Features.NeXTRuntime) 773c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateGNUObjCRuntime(*this); 783c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (Features.ObjCNonFragileABI) 793c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacNonFragileABIObjCRuntime(*this); 803c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else 813c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacObjCRuntime(*this); 82e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 833d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman // Enable TBAA unless it's suppressed. 843d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!CodeGenOpts.RelaxedAliasing && CodeGenOpts.OptimizationLevel > 0) 850b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman TBAA = new CodeGenTBAA(Context, VMContext, getLangOptions(), 860b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman ABI.getMangleContext()); 873d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 88e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 8920f12a20ba9cfa6f8d53c8304e24f50903c45184Anders Carlsson DebugInfo = CodeGenOpts.DebugInfo ? new CGDebugInfo(*this) : 0; 90d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall 91d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall Block.GlobalUniqueCount = 0; 92d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall Int8PtrTy = llvm::Type::getInt8PtrTy(M.getContext()); 932b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 942b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 952b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 96815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 97f16aa103d3afd42fbca2ab346f191bf745cec092John McCall delete &ABI; 984376c85fb0ac9e7fd779d246efc77e1169179138Dan Gohman delete TBAA; 99815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 100815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 101815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 1020d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnallvoid CodeGenModule::createObjCRuntime() { 1030d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall if (!Features.NeXTRuntime) 1040d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateGNUObjCRuntime(*this); 1050d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else if (Features.ObjCNonFragileABI) 1060d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateMacNonFragileABIObjCRuntime(*this); 1070d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else 1080d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateMacObjCRuntime(*this); 1090d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall} 1100d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall 111815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 11282227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 1136c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalInitFunc(); 114efb0fa9e11f75af51744a6159530ef7cc8efa24aDaniel Dunbar EmitCXXGlobalDtorFunc(); 115208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 116208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 117208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 1186bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 1196bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 120532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 1210269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 122744016dde06fcffd50931e94a98c850f8b12cd87John McCall 123b25938303de0976b9f189363d43033e5788e3d36John McCall SimplifyPersonality(); 124b25938303de0976b9f189363d43033e5788e3d36John McCall 125744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (getCodeGenOpts().EmitDeclMetadata) 126744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitDeclMetadata(); 127f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 128f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 1293d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanllvm::MDNode *CodeGenModule::getTBAAInfo(QualType QTy) { 1303d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!TBAA) 1313d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return 0; 1323d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return TBAA->getTBAAInfo(QTy); 1333d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1343d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1353d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanvoid CodeGenModule::DecorateInstruction(llvm::Instruction *Inst, 1363d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman llvm::MDNode *TBAAInfo) { 1373d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman Inst->setMetadata(llvm::LLVMContext::MD_tbaa, TBAAInfo); 1383d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1393d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1406374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCallbool CodeGenModule::isTargetDarwin() const { 1416374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall return getContext().Target.getTriple().getOS() == llvm::Triple::Darwin; 1426374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall} 1436374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 144488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 1452c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 14690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 14790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 14890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 14990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 15156b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 1522c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 1530a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 1540a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 1552c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 15658c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 157488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 158c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 15990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 16090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 16190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 16290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 16456b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 165c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 1660a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 167c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 168c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 1691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 1700ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson const NamedDecl *D) const { 17104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 172df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 1737e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 1746ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 1757e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1766ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 177af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility for definitions. 178af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 179071d3af0de273b1079d79f7f979264f28d567373Rafael Espindola if (LV.visibilityExplicit() || !GV->hasAvailableExternallyLinkage()) 180071d3af0de273b1079d79f7f979264f28d567373Rafael Espindola GV->setVisibility(GetLLVMVisibility(LV.visibility())); 1817cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 1827cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 183cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// Set the symbol visibility of type information (vtable and RTTI) 184cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// associated with the given type. 185cbfe50224b19119e759802bd0c1463269dffd09eJohn McCallvoid CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV, 186cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall const CXXRecordDecl *RD, 187fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson TypeVisibilityKind TVK) const { 1880ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(GV, RD); 189cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 190279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakVTables) 191279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall return; 192279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall 1939a86a137b0872bad25161fb3408a71d919638757Anders Carlsson // We never want to drop the visibility for RTTI names. 1949a86a137b0872bad25161fb3408a71d919638757Anders Carlsson if (TVK == TVK_ForRTTIName) 1959a86a137b0872bad25161fb3408a71d919638757Anders Carlsson return; 1969a86a137b0872bad25161fb3408a71d919638757Anders Carlsson 197cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We want to drop the visibility to hidden for weak type symbols. 198cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // This isn't possible if there might be unresolved references 199cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // elsewhere that rely on this symbol being visible. 200cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2017a536907da776bdc47a704e7cafd641e8150e653John McCall // This should be kept roughly in sync with setThunkVisibility 2027a536907da776bdc47a704e7cafd641e8150e653John McCall // in CGVTables.cpp. 2037a536907da776bdc47a704e7cafd641e8150e653John McCall 204cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Preconditions. 205f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson if (GV->getLinkage() != llvm::GlobalVariable::LinkOnceODRLinkage || 206cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->getVisibility() != llvm::GlobalVariable::DefaultVisibility) 207cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 208cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 209cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Don't override an explicit visibility attribute. 210cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (RD->hasAttr<VisibilityAttr>()) 211cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 212cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 213cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall switch (RD->getTemplateSpecializationKind()) { 214cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We have to disable the optimization if this is an EI definition 215cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // because there might be EI declarations in other shared objects. 216cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDefinition: 217cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDeclaration: 218cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 219cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2207a536907da776bdc47a704e7cafd641e8150e653John McCall // Every use of a non-template class's type information has to emit it. 221cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_Undeclared: 222cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 223cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2247a536907da776bdc47a704e7cafd641e8150e653John McCall // In theory, implicit instantiations can ignore the possibility of 2257a536907da776bdc47a704e7cafd641e8150e653John McCall // an explicit instantiation declaration because there necessarily 2267a536907da776bdc47a704e7cafd641e8150e653John McCall // must be an EI definition somewhere with default visibility. In 2277a536907da776bdc47a704e7cafd641e8150e653John McCall // practice, it's possible to have an explicit instantiation for 2287a536907da776bdc47a704e7cafd641e8150e653John McCall // an arbitrary template class, and linkers aren't necessarily able 2297a536907da776bdc47a704e7cafd641e8150e653John McCall // to deal with mixed-visibility symbols. 2307a536907da776bdc47a704e7cafd641e8150e653John McCall case TSK_ExplicitSpecialization: 231cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ImplicitInstantiation: 232279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakTemplateVTables) 2337a536907da776bdc47a704e7cafd641e8150e653John McCall return; 234cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 235cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall } 236cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 237cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // If there's a key function, there may be translation units 238cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // that don't have the key function's definition. But ignore 239cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // this if we're emitting RTTI under -fno-rtti. 240fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson if (!(TVK != TVK_ForRTTI) || Features.RTTI) { 241cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (Context.getKeyFunction(RD)) 242cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 243fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson } 244cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 245cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Otherwise, drop the visibility to hidden. 246cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 247b1c65ff108de47a89585ad37874bd6cb232664cdRafael Espindola GV->setUnnamedAddr(true); 248cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall} 249cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 250793a990774826a0c20b0da66cec0991badfb8b63Anders Carlssonllvm::StringRef CodeGenModule::getMangledName(GlobalDecl GD) { 251793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 252793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 253793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; 254793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (!Str.empty()) 255793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 256793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 2574c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall if (!getCXXABI().getMangleContext().shouldMangleDeclName(ND)) { 258793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson IdentifierInfo *II = ND->getIdentifier(); 259793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson assert(II && "Attempt to mangle unnamed decl."); 260793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 261793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = II->getName(); 262793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 263793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson } 264793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 265793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::SmallString<256> Buffer; 266793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 2674c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Buffer); 268793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 2694c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Buffer); 270793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const BlockDecl *BD = dyn_cast<BlockDecl>(ND)) 27114110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne getCXXABI().getMangleContext().mangleBlock(BD, Buffer); 272793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else 2734c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleName(ND, Buffer); 274793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 275793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson // Allocate space for the mangled name. 276793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson size_t Length = Buffer.size(); 277793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson char *Name = MangledNamesAllocator.Allocate<char>(Length); 278793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson std::copy(Buffer.begin(), Buffer.end(), Name); 279793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 280793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = llvm::StringRef(Name, Length); 281793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 282793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 283793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson} 284793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 28514110477887e3dc168ffc6c191e72d705051f99ePeter Collingbournevoid CodeGenModule::getBlockMangledName(GlobalDecl GD, MangleBuffer &Buffer, 28614110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const BlockDecl *BD) { 28714110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleContext &MangleCtx = getCXXABI().getMangleContext(); 28814110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const Decl *D = GD.getDecl(); 28914110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne if (D == 0) 29014110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleCtx.mangleGlobalBlock(BD, Buffer.getBuffer()); 29114110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 29214110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleCtx.mangleCtorBlock(CD, GD.getCtorType(), BD, Buffer.getBuffer()); 29314110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 29414110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleCtx.mangleDtorBlock(DD, GD.getDtorType(), BD, Buffer.getBuffer()); 29514110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else 29614110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleCtx.mangleBlock(cast<DeclContext>(D), BD, Buffer.getBuffer()); 2979a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson} 2989a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson 299f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::GlobalValue *CodeGenModule::GetGlobalValue(llvm::StringRef Name) { 300f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return getModule().getNamedValue(Name); 3015f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 3025f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 3036d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 3046d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 3056bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 30649988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3076bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 3086d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3096d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 3106bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 3116bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 3126bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 31349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3146bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 3156bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 3166bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3176bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 3186bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 3196bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 32015f6765f6efd24bec4ec6f54e282c14193ef4014Benjamin Kramer llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), false); 32196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 3226bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3236bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 3241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType* CtorStructTy = 3251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), 32696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 3276bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3286bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 3296bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 3306bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 3316bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 3321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 3330032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 3343c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 33508e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 3366bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 3376bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3386bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 33996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 3401c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 341572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 3427db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 3431c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 3446d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 3456d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3466d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 347532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 348532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 349532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 350532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 351532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 352532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 35396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 354532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 355532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 3561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *gv = 3571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(TheModule, Array->getType(), false, 3581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::AppendingLinkage, Array, 3591c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.global.annotations"); 360532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 361532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 362532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 363d46f98573ba104eda102dd3224b2dca69f1c6336John McCallllvm::GlobalValue::LinkageTypes 364d46f98573ba104eda102dd3224b2dca69f1c6336John McCallCodeGenModule::getFunctionLinkage(const FunctionDecl *D) { 36590e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); 3667c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 367f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_Internal) 368d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::InternalLinkage; 369f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 370f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<DLLExportAttr>()) 371d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::DLLExportLinkage; 372f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 373f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<WeakAttr>()) 374d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::WeakAnyLinkage; 375f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 376f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 377f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition somewhere else, so we can use available_externally linkage. 378f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_C99Inline) 379fd0f89d3d7e4220327abdec1cb115474d70219dcFariborz Jahanian return llvm::Function::AvailableExternallyLinkage; 380f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 381f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C++, the compiler has to emit a definition in every translation unit 382f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // that references the function. We should use linkonce_odr because 383f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // a) if all references in this translation unit are optimized away, we 384f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 385f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 386f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition is dependable. 387f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 388142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext 389142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian ? llvm::Function::LinkOnceODRLinkage 390142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian : llvm::Function::InternalLinkage; 391f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 392f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // An explicit instantiation of a template has weak linkage, since 393f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // explicit instantiations can occur in multiple translation units 394f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // and must all be equivalent. However, we are not allowed to 395f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // throw away these explicit instantiations. 396f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_ExplicitTemplateInstantiation) 397142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext 398142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian ? llvm::Function::WeakODRLinkage 399142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian : llvm::Function::InternalLinkage; 400f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 401f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // Otherwise, we have strong external linkage. 402f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner assert(Linkage == GVA_StrongExternal); 403f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner return llvm::Function::ExternalLinkage; 404d46f98573ba104eda102dd3224b2dca69f1c6336John McCall} 405d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 406d46f98573ba104eda102dd3224b2dca69f1c6336John McCall 407d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// SetFunctionDefinitionAttributes - Set attributes for a global. 408d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// 409d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// FIXME: This is currently only done for aliases and functions, but not for 410d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// variables (these details are set in EmitGlobalVarDefinition for variables). 411d46f98573ba104eda102dd3224b2dca69f1c6336John McCallvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 412d46f98573ba104eda102dd3224b2dca69f1c6336John McCall llvm::GlobalValue *GV) { 4137c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 414d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 415d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 4167dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 4171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 4187dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 419ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 420761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 421ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 422761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 423ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 424ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 425f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 426f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4277c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 4287c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 42974ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 4301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 431af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 43240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<AlwaysInlineAttr>()) 433af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 4341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 435dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar if (D->hasAttr<NakedAttr>()) 436dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar F->addFnAttr(llvm::Attribute::Naked); 437dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar 4381feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 43981ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 440f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 441c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) 442c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola F->setUnnamedAddr(true); 443c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola 444fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson if (Features.getStackProtectorMode() == LangOptions::SSPOn) 445fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 446fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson else if (Features.getStackProtectorMode() == LangOptions::SSPReq) 447fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 448fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 449cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); 450cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt if (alignment) 451cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt F->setAlignment(alignment); 452cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt 453fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 454bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 455bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 456f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 457f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 4597c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 460934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) 461934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson setGlobalVisibility(GV, ND); 4621fb0caaa7bef765b85972274e3b434af2572c141John McCall else 4631fb0caaa7bef765b85972274e3b434af2572c141John McCall GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 4647c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 46540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 4667c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 4677c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 46840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 4697c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 47082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 47182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); 4727c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 4737c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4740e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 4750e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 4760e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 4770e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 4780e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 4797c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 4817c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4820e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 483f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 484f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 485b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlssonvoid CodeGenModule::SetFunctionAttributes(GlobalDecl GD, 486c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 487c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 488b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); 489b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson 490c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 491b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); 4921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4937c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 4947c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 4951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 49640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 4977c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 4981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 49940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<WeakImportAttr>()) { 5007c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 5011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 5027c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 5037c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 5041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 505af14603ca61757cf4361b583b45639a04c57e651John McCall 506af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = FD->getLinkageAndVisibility(); 507af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() == ExternalLinkage && LV.visibilityExplicit()) { 508af14603ca61757cf4361b583b45639a04c57e651John McCall F->setVisibility(GetLLVMVisibility(LV.visibility())); 509af14603ca61757cf4361b583b45639a04c57e651John McCall } 5107c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 5117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 51240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 5137c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 514219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 515219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 5160269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 5171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 5180269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 51935f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 5200269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5210269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5220269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 5230269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 524ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 5250269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 5260269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5273c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 5281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 52935f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 53035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 53135f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 53235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 5331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 5341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 535a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 53635f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 5371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 538c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 539c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 54096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 5411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 5431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 5440269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 5457db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 5461c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 5470269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5480269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 5490269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5500269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5510269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 55267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 55367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 55467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 555bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 556046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson while (!DeferredDeclsToEmit.empty() || !DeferredVTables.empty()) { 557046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson if (!DeferredVTables.empty()) { 558046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson const CXXRecordDecl *RD = DeferredVTables.back(); 559046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson DeferredVTables.pop_back(); 560046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson getVTables().GenerateClassData(getVTableLinkage(RD), RD); 561bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola continue; 562bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola } 563bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 5642a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 56567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 56667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 567c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // Check to see if we've already emitted this. This is necessary 568c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // for a couple of reasons: first, decls can end up in the 569c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // deferred-decls queue multiple times, and second, decls can end 570c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // up with definitions in unusual ways (e.g. by an extern inline 571c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // function acquiring a strong function redefinition). Just 572c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // ignore these cases. 573c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // 574c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // TODO: That said, looking this up multiple times is very wasteful. 5759a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef Name = getMangledName(D); 576f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *CGRef = GetGlobalValue(Name); 57767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 5781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 57967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 58067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 5811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 582c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // GlobalAlias::isDeclaration() defers to the aliasee, but for our 583c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // purposes an alias counts as a definition. 584c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall if (isa<llvm::GlobalAlias>(CGRef)) 585c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall continue; 586c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall 58767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 58867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 58967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 5905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 5938bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 5941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 5951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// GlobalValue being annotated. The second field is the constant string 5961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// created from the AnnotateAttr's annotation. The third field is a constant 5978bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 5988bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 5998bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6008bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 6018bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 6028bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 6048bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 6058bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 6068bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 6078bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6088bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 6098bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 6103c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); 6111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *anno = llvm::ConstantArray::get(VMContext, 6120032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson AA->getAnnotation(), true); 6130032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *unit = llvm::ConstantArray::get(VMContext, 6140032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson M->getModuleIdentifier(), 6158bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 6168bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6178bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 6188bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 6191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *annoGV = 62095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, anno->getType(), false, 62195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, anno, 62295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GV->getName()); 6238bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 6248bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 62595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, unit->getType(), false, 6261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::PrivateLinkage, unit, 62795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ".str"); 628d3d4e1ee398748468cbaaddb3b0af5953f043803Rafael Espindola unitGV->setUnnamedAddr(true); 6298bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 63057d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 6318bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 6323c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, SBP), 6333c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(annoGV, SBP), 6343c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(unitGV, SBP), 6350032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) 6368bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 63747a434ff3d49e7906eda88e8e8242e4297725b32Owen Anderson return llvm::ConstantStruct::get(VMContext, Fields, 4, false); 6388bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 6398bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 640a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidisbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 64190e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis // Never defer when EmitAllDecls is specified. 64290e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis if (Features.EmitAllDecls) 643a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidis return false; 6440b6bc8bd7a1d2a7d7478d13d78cff94cacad61fcDouglas Gregor 6454ac7c0bb39696e92fd220118fedc484c09a69870Argyrios Kyrtzidis return !getContext().DeclMustBeEmitted(Global); 64673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 64773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 6486a836706c40a31c716952b74785102c90fd6afa7Rafael Espindolallvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { 6496a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const AliasAttr *AA = VD->getAttr<AliasAttr>(); 6506a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola assert(AA && "No alias?"); 6516a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6526a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); 6536a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6546a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // See if there is already something with the target's name in the module. 655f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); 6566a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6576a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::Constant *Aliasee; 6586a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (isa<llvm::FunctionType>(DeclTy)) 6591faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 6601faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 6616a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola else 662f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 6636a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::PointerType::getUnqual(DeclTy), 0); 6646a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (!Entry) { 6656a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); 6666a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola F->setLinkage(llvm::Function::ExternalWeakLinkage); 6676a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.insert(F); 6686a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 6696a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6706a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return Aliasee; 6716a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola} 6726a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 673b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 6744a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 6751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6766a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // Weak references don't produce any output by themselves. 6776a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (Global->hasAttr<WeakRefAttr>()) 6786a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return; 6796a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 680bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 681bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 68240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 683f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return EmitAliasDefinition(GD); 684219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 68567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 6865e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 687754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (FD->getIdentifier()) { 688754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = FD->getName(); 689754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_Block_object_assign") { 690754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl = FD; 691754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_Block_object_dispose") { 692754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl = FD; 693754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 694754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 695754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 69673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 69773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 69873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 6990269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 7000269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 701bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 702bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 703754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (VD->getIdentifier()) { 704754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = VD->getName(); 705754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_NSConcreteGlobalBlock") { 706754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl = VD; 707754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_NSConcreteStackBlock") { 708754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl = VD; 709754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 710754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 711754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 712754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 713a9a55c063e9e59c6ab0a6d7a21302660f7bde9f9Douglas Gregor if (VD->isThisDeclarationADefinition() != VarDecl::Definition) 71473241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7154c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 7164c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 71767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 71867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 7194357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (!MayDeferGeneration(Global)) { 7204357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Emit the definition if it can't be deferred. 7214357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner EmitGlobalDefinition(GD); 722bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 723bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 724bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall 725bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // If we're deferring emission of a C++ variable with an 726bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer, remember the order in which it appeared in the file. 727bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus && isa<VarDecl>(Global) && 728bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall cast<VarDecl>(Global)->hasInit()) { 729bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); 730bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall CXXGlobalInits.push_back(0); 731bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } 7324357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 7334357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // If the value has already been used, add it directly to the 7344357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit list. 7359a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 7364357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (GetGlobalValue(MangledName)) 7374357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDeclsToEmit.push_back(GD); 7384357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner else { 7394357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 7404357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // first use of the mangled name will cause it to move into 7414357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit. 7424357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDecls[MangledName] = GD; 7434357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner } 7444c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 7454c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 746b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 7474a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 7481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 749cb421fa690da545b58a720abe5f1c49b166dbde7Dan Gohman PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), 7508e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 7518e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 7528e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 75344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 75444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // At -O0, don't generate IR for functions with available_externally 75544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // linkage. 7567feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor if (CodeGenOpts.OptimizationLevel == 0 && 7577feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor !Function->hasAttr<AlwaysInlineAttr>() && 75844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getFunctionLinkage(Function) 75944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor == llvm::Function::AvailableExternallyLinkage) 76044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return; 76144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor 76244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { 76344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (Method->isVirtual()) 76444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getVTables().EmitThunks(GD); 7657270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson 76644eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) 76744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return EmitCXXConstructor(CD, GD.getCtorType()); 7684357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 76944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(Method)) 77044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return EmitCXXDestructor(DD, GD.getDtorType()); 77144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 772b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 773b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalFunctionDefinition(GD); 77444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 775b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 776b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 777b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalVarDefinition(VD); 7784357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 7794357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner assert(0 && "Invalid argument to EmitGlobalDefinition()"); 780bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 781bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 78274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 78374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 78474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 78574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 78674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 78774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 78874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 789f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 790f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMFunction(llvm::StringRef MangledName, 791f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *Ty, 7921faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson GlobalDecl D, bool ForVTable) { 7930558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 794f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 7950558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 7966a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 7976a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); 7986a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (FD && !FD->hasAttr<WeakAttr>()) 7997270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 8006a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8016a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 8026a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 8036a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8040558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 8050558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 8061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8070558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 80896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 8093c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, PTy); 8100558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 8111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 812654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 813654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 814654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 815654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 816784f21121a6c9418ebd86baa6814e36e1176c410John McCall 817784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::FunctionType *FTy; 818784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (isa<llvm::FunctionType>(Ty)) { 819784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = cast<llvm::FunctionType>(Ty); 820784f21121a6c9418ebd86baa6814e36e1176c410John McCall } else { 82115f6765f6efd24bec4ec6f54e282c14193ef4014Benjamin Kramer FTy = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), false); 822654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 823654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 824bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 825784f21121a6c9418ebd86baa6814e36e1176c410John McCall llvm::Function *F = llvm::Function::Create(FTy, 826654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 827f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall MangledName, &getModule()); 828f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(F->getName() == MangledName && "name was uniqued!"); 829654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 830b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetFunctionAttributes(D, F, IsIncompleteFunction); 831654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 83267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 83367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 83467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 835f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 83667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 83767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 83867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 83967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 84067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 841bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall 842bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Otherwise, there are cases we have to worry about where we're 843bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // using a declaration for which we must emit a definition but where 844bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // we might not find a top-level definition: 845bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - member functions defined inline in their classes 846bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - friend functions defined inline in some class 847bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - special member functions with implicit definitions 848bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // If we ever change our AST traversal to walk into class methods, 849bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // this will be unnecessary. 8501faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // 8511faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // We also don't emit a definition for a function if it's going to be an entry 8521faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // in a vtable, unless it's already marked as used. 85301de7a44cea9f77cbcda65faad8edc8b48a3b617Rafael Espindola } else if (getLangOptions().CPlusPlus && D.getDecl()) { 854bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Look for a declaration that's lexically in a record. 855bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall const FunctionDecl *FD = cast<FunctionDecl>(D.getDecl()); 856bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall do { 857bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { 8581faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson if (FD->isImplicit() && !ForVTable) { 859bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall assert(FD->isUsed() && "Sema didn't mark implicit function as used!"); 860bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall DeferredDeclsToEmit.push_back(D); 861bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 862bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } else if (FD->isThisDeclarationADefinition()) { 863bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall DeferredDeclsToEmit.push_back(D); 864bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 865bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } 8667b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 867bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall FD = FD->getPreviousDeclaration(); 868bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } while (FD); 86967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 8701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 871784f21121a6c9418ebd86baa6814e36e1176c410John McCall // Make sure the result is of the requested type. 872784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (!IsIncompleteFunction) { 873784f21121a6c9418ebd86baa6814e36e1176c410John McCall assert(F->getType()->getElementType() == Ty); 874784f21121a6c9418ebd86baa6814e36e1176c410John McCall return F; 875784f21121a6c9418ebd86baa6814e36e1176c410John McCall } 876784f21121a6c9418ebd86baa6814e36e1176c410John McCall 877784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 878784f21121a6c9418ebd86baa6814e36e1176c410John McCall return llvm::ConstantExpr::getBitCast(F, PTy); 8790558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 8800558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 88174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 88274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 88374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 884b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 8851faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson const llvm::Type *Ty, 8861faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson bool ForVTable) { 88774391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 88874391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 8894a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 890bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 8919a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 8921faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson return GetOrCreateLLVMFunction(MangledName, Ty, GD, ForVTable); 89374391b48b4791cded373683a3baf67314f358d50Chris Lattner} 89477ba708819285931932ecd33691a672bb59d221aEli Friedman 89574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 89674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 89774391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 89874391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 899f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 9001faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false); 90174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 902bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 90320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedmanstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D) { 90488786862424cb2d478516d911709dc19c962af9cJohn McCall if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) 90520e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 90620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman if (Context.getLangOptions().CPlusPlus && 90720e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman Context.getBaseElementType(D->getType())->getAs<RecordType>()) { 90820e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman // FIXME: We should do something fancier here! 90920e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 91020e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 91120e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 91220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 91320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 91474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 91574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 91674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 91774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 91874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 91974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 92074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 921f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 922f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMGlobal(llvm::StringRef MangledName, 923f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::PointerType *Ty, 924c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola const VarDecl *D, 925c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola bool UnnamedAddr) { 9263c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 927f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 92899b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 9296a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 9306a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (D && !D->hasAttr<WeakAttr>()) 9317270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 9326a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 9336a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 9346a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 9356a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 936c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola if (UnnamedAddr) 937c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola Entry->setUnnamedAddr(true); 938c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola 93974391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 940570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 9411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 94299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 9433c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 94499b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 9451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 94667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 94767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 94867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 949f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 95067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 95167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 95267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 95367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 95467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 95567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 9561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 9581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 95999b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 960f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 0, MangledName, 0, 96156ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 96249988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 96399b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 96474391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 965f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 966f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 96720e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman GV->setConstant(DeclIsConstantGlobal(Context, D)); 96849988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 969110e8e56af30363072c140285961592b0107f789John McCall // Set linkage and visibility in case we never see a definition. 970af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 971af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() != ExternalLinkage) { 972110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::InternalLinkage); 973110e8e56af30363072c140285961592b0107f789John McCall } else { 974110e8e56af30363072c140285961592b0107f789John McCall if (D->hasAttr<DLLImportAttr>()) 975110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::DLLImportLinkage); 976110e8e56af30363072c140285961592b0107f789John McCall else if (D->hasAttr<WeakAttr>() || D->hasAttr<WeakImportAttr>()) 977110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 978110e8e56af30363072c140285961592b0107f789John McCall 979af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility on a declaration only if it's explicit. 980af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.visibilityExplicit()) 981af14603ca61757cf4361b583b45639a04c57e651John McCall GV->setVisibility(GetLLVMVisibility(LV.visibility())); 982110e8e56af30363072c140285961592b0107f789John McCall } 98356ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 98456ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 98574391b48b4791cded373683a3baf67314f358d50Chris Lattner } 9861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 987f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GV; 98874391b48b4791cded373683a3baf67314f358d50Chris Lattner} 989eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 990eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 9913bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlssonllvm::GlobalVariable * 9923bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders CarlssonCodeGenModule::CreateOrReplaceCXXRuntimeVariable(llvm::StringRef Name, 9933bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson const llvm::Type *Ty, 9943bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalValue::LinkageTypes Linkage) { 9953bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name); 9963bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *OldGV = 0; 9973bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 9983bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 9993bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV) { 10003bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Check if the variable has the right type. 10013bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV->getType()->getElementType() == Ty) 10023bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 10033bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10043bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Because C++ name mangling, the only way we can end up with an already 10053bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // existing global with the same name is if it has been declared extern "C". 100696eaf2992b5955d1470fc9cce7a96e7e1e3b4ea7Anders Carlsson assert(GV->isDeclaration() && "Declaration has wrong type!"); 10073bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV = GV; 10083bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10093bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10103bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Create a new variable. 10113bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV = new llvm::GlobalVariable(getModule(), Ty, /*isConstant=*/true, 10123bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson Linkage, 0, Name); 10133bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10143bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (OldGV) { 10153bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Replace occurrences of the old variable if needed. 10163bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV->takeName(OldGV); 10173bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10183bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (!OldGV->use_empty()) { 10193bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::Constant *NewPtrForOldDecl = 10203bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); 10213bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->replaceAllUsesWith(NewPtrForOldDecl); 10223bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10233bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10243bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->eraseFromParent(); 10253bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 10263bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 10273bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 10283bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson} 10293bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 103074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 103174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 103274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 103374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 103474391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 103574391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 103674391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 103774391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 103874391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 103974391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 10401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::PointerType *PTy = 104296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 1043f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 10449a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1045f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMGlobal(MangledName, PTy, D); 104674391b48b4791cded373683a3baf67314f358d50Chris Lattner} 10473f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 104874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 104974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 105074391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 105174391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 1052f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 1053c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0, 1054c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola true); 1055bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1056bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 105703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 105803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 105903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 10607520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 10617520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 10627520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 10637520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 10649a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1065f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (!GetGlobalValue(MangledName)) { 1066555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 106703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 10687520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 10697520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 10707520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 10717520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 107203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 107303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 107403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 10756fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregorvoid CodeGenModule::EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired) { 10766fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor if (DefinitionRequired) 10776fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor getVTables().GenerateClassData(getVTableLinkage(Class), Class); 10786fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor} 10796fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor 10804b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregorllvm::GlobalVariable::LinkageTypes 1081046c294a43024874ff35656c6e785b64e72f1f36Anders CarlssonCodeGenModule::getVTableLinkage(const CXXRecordDecl *RD) { 1082dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (RD->isInAnonymousNamespace() || !RD->hasLinkage()) 1083dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::InternalLinkage; 1084dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1085dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (const CXXMethodDecl *KeyFunction 1086dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor = RD->getASTContext().getKeyFunction(RD)) { 1087dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // If this class has a key function, use that to determine the linkage of 1088dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // the vtable. 10894b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor const FunctionDecl *Def = 0; 109006a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (KeyFunction->hasBody(Def)) 10914b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor KeyFunction = cast<CXXMethodDecl>(Def); 1092dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 10934b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor switch (KeyFunction->getTemplateSpecializationKind()) { 10944b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_Undeclared: 10954b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitSpecialization: 10966d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // When compiling with optimizations turned on, we emit all vtables, 10976d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // even if the key function is not defined in the current translation 10986d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // unit. If this is the case, use available_externally linkage. 10996d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson if (!Def && CodeGenOpts.OptimizationLevel) 11006d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson return llvm::GlobalVariable::AvailableExternallyLinkage; 11016d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson 11024b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->isInlined()) 1103142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1104142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1105142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 11064b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11074b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::ExternalLinkage; 11084b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11094b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ImplicitInstantiation: 1110142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1111142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1112142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1113f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 11144b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDefinition: 1115142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1116142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::WeakODRLinkage : 1117142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1118f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 11194b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 11204b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // FIXME: Use available_externally linkage. However, this currently 11214b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // breaks LLVM's build due to undefined symbols. 11224b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1123142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1124142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1125142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 11264b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 1127dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor } 1128dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 112953bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian if (Context.getLangOptions().AppleKext) 113053bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::Function::InternalLinkage; 113153bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian 1132dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor switch (RD->getTemplateSpecializationKind()) { 1133dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_Undeclared: 1134dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitSpecialization: 1135dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ImplicitInstantiation: 1136dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // FIXME: Use available_externally linkage. However, this currently 1137dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // breaks LLVM's build due to undefined symbols. 1138dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1139142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDeclaration: 114053bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 1141142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian 1142142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDefinition: 114353bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 11444b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 11454b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11464b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // Silence GCC warning. 114753bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 11484b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor} 11494b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 1150687cc4a850b59116efee061018f0d8df50728b82Ken DyckCharUnits CodeGenModule::GetTargetTypeStoreSize(const llvm::Type *Ty) const { 115106f486ecd05bd6788da97c39164c1903a084c26dKen Dyck return Context.toCharUnitsFromBits( 115206f486ecd05bd6788da97c39164c1903a084c26dKen Dyck TheTargetData.getTypeStoreSizeInBits(Ty)); 1153687cc4a850b59116efee061018f0d8df50728b82Ken Dyck} 1154687cc4a850b59116efee061018f0d8df50728b82Ken Dyck 1155bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 11568f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 115777ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 11586c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman bool NonConstInit = false; 11591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 116031310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl const Expr *InitExpr = D->getAnyInitializer(); 11613bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson 11623bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson if (!InitExpr) { 1163cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 116403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 116503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 116603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 116703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 116803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 116903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 117003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 117103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 117203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 1173b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 117477ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 1175c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor Init = EmitConstantExpr(InitExpr, D->getType()); 11766e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 11773bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson QualType T = InitExpr->getType(); 1178c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor if (D->getType()->isReferenceType()) 1179c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor T = D->getType(); 1180c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor 118189ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 118289ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 11836c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman NonConstInit = true; 118489ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 118589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 118689ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 118789ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 1188bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } else { 1189bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // We don't need an initializer, so remove the entry for the delayed 1190bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer position (just in case this entry was delayed). 1191bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus) 1192bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition.erase(D); 11936e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 11948f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 11958e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 11962d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 1197570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 11981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1199570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 1200570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 12019d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 12029d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 12039d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 1204570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 1205570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 12061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1207570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 1208570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 12091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1210570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 1211570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 1212570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 1213570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 1214570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 1215570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 1216570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 1217570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 1218570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 1219570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 1220570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 1221570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { 12221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1223f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // Move the old entry aside so that we'll create a new one. 1224f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Entry->setName(llvm::StringRef()); 1225232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 1226570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 1227570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 12280558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 122977ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 12301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 12313c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 1232570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 123377ba708819285931932ecd33691a672bb59d221aEli Friedman 123477ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 1235570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 123677ba708819285931932ecd33691a672bb59d221aEli Friedman } 123777ba708819285931932ecd33691a672bb59d221aEli Friedman 123840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 12398bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 12408bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 1241f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 12428bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 12438bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 124488a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 1245e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 1246e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 1247e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 12486c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman if (!NonConstInit && DeclIsConstantGlobal(Context, D)) 1249e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 12501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12518b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); 1252354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 125388a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 1254354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage = 1255354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GetLLVMLinkageVarDefinition(D, GV); 1256354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setLinkage(Linkage); 1257354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian if (Linkage == llvm::GlobalVariable::CommonLinkage) 1258354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // common vars aren't constant even if declared const. 1259354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setConstant(false); 1260354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1261354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian SetCommonAttributes(D, GV); 1262354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 12633030eb82593097502469a8b3fc26112c79c75605John McCall // Emit the initializer function if necessary. 12643030eb82593097502469a8b3fc26112c79c75605John McCall if (NonConstInit) 12653030eb82593097502469a8b3fc26112c79c75605John McCall EmitCXXGlobalVarDeclInitFunc(D, GV); 12663030eb82593097502469a8b3fc26112c79c75605John McCall 1267354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // Emit global variable debug information. 1268354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian if (CGDebugInfo *DI = getDebugInfo()) { 1269354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->setLocation(D->getLocation()); 1270354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->EmitGlobalVariable(GV, D); 1271354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian } 1272354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian} 1273354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1274354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanianllvm::GlobalValue::LinkageTypes 1275354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz JahanianCodeGenModule::GetLLVMLinkageVarDefinition(const VarDecl *D, 1276354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalVariable *GV) { 127790e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); 1278a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 1279354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::InternalLinkage; 128040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1281354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLImportLinkage; 128240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1283354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLExportLinkage; 1284e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1285e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1286354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 1287e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1288354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 12898f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor } else if (Linkage == GVA_TemplateInstantiation || 12908f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor Linkage == GVA_ExplicitTemplateInstantiation) 12918f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor // FIXME: It seems like we can provide more specific linkage here 12928f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor // (LinkOnceODR, WeakODR). 1293354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 1294a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher else if (!getLangOptions().CPlusPlus && 1295a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher ((!CodeGenOpts.NoCommon && !D->getAttr<NoCommonAttr>()) || 1296a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher D->getAttr<CommonAttr>()) && 1297309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 129891f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher !D->getAttr<SectionAttr>() && !D->isThreadSpecified()) { 129991f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher // Thread local vars aren't considered common linkage. 1300354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::CommonLinkage; 1301686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 1302354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::ExternalLinkage; 130388a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 13045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1305bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1306bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1307bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1308bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1309bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1310bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1311bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1312bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1313bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1314bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1315bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1316bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1317bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1318bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 13191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1320bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 1321bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 1322bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1323bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1324dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer UI != E; ) { 1325bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 1326dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::Value::use_iterator I = UI++; // Increment before the CI is erased. 1327dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*I); 13288670cd3ea4dfbf86caacd270ec2441e9949bbb6aGabor Greif if (!CI) continue; // FIXME: when we allow Invoke, just do CallSite CS(*I) 132935db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif llvm::CallSite CS(CI); 1330dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer if (!CI || !CS.isCallee(I)) continue; 13311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1332bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1333bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1334bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1335bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1336bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1337bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1338bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1339bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1340bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1341bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1342bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1343bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 134435db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif if (CS.arg_size() == ArgNo || 134535db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif CS.getArgument(ArgNo)->getType() != AI->getType()) { 1346bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1347bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1348bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1349bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1350bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1351bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 13521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1353bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1354bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 13556ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif ArgList.append(CS.arg_begin(), CS.arg_begin() + ArgNo); 1356bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 1357bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 1358bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1359ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1360bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 1361bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 1362ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1363bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1364bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 136500549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 136600549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 13673b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1368c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner // Copy debug location attached to CI. 1369c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner if (!CI->getDebugLoc().isUnknown()) 1370c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner NewCall->setDebugLoc(CI->getDebugLoc()); 1371bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1372bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1373bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1374bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1375bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1376b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 1377b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 1378c0bf462cf35fe050bddbd8bff967298e4a67e79dJohn McCall const llvm::FunctionType *Ty = getTypes().GetFunctionType(GD); 13799fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1380b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 13811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13820558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 13830558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 13840558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 13850558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 13860558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 13871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13890558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1390bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 13911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 139242745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1393bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 13940558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 139534809507232bc4c3c4840c7d092c7440219fddafChris Lattner 139662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 139762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 139862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 139962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 140062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 140162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 1402f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // (e.g. "int f(int x)"). Move the old function aside so that it 1403f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // doesn't interfere with GetAddrOfFunction. 1404f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall OldFn->setName(llvm::StringRef()); 1405b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 14061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1407bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1408bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1409bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 14109fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1411bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 14129fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 14139fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 14141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 141562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1416bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 14171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 14183c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1419bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1420bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 14211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 142262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1423bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 14241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14250558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1426bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 14271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1428112c967bd5c862a0f5d7913aa06700c048807db8John McCall // We need to set linkage and visibility on the function before 1429112c967bd5c862a0f5d7913aa06700c048807db8John McCall // generating code for it because various parts of IR generation 1430112c967bd5c862a0f5d7913aa06700c048807db8John McCall // want to propagate this information down (e.g. to local static 1431112c967bd5c862a0f5d7913aa06700c048807db8John McCall // declarations). 14320558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 14338b2423361648c39a7d8a3c5e8129e12006deac32John McCall setFunctionLinkage(D, Fn); 1434bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1435112c967bd5c862a0f5d7913aa06700c048807db8John McCall // FIXME: this is redundant with part of SetFunctionDefinitionAttributes 14360ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(Fn, D); 1437112c967bd5c862a0f5d7913aa06700c048807db8John McCall 1438219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 14396379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 14407c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 14417c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 14421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 144340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1444219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 144540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1446219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1447bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1448bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1449f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallvoid CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { 1450f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 145140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1452bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1453bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 14549a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 1455f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1456f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // If there is a definition in the module, then it wins over the alias. 1457f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // This is dubious, but allow it to be safe. Just ignore the alias. 1458f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 1459f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (Entry && !Entry->isDeclaration()) 1460f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return; 14611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1462f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1463bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1464bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1465bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1466bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1467bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 14681faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 14691faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 1470bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1471f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 147296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1473bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1474bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 14751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1476bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1477bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1478bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 14791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1480bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1481f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(Entry->isDeclaration()); 1482f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1483bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1484bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1485bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1486bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1487bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1488bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1489bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1490f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GA->takeName(Entry); 14911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14923c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1493bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1494bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1495f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall } else { 14969a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson GA->setName(MangledName); 1497bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 14981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14997c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 15007c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 15017c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 150240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 15037c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 15047c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 150506a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (FD->hasBody()) 15067c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 15077c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 15087c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 15097c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 15101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 151111e8ce7380856abee188b237c2600272df2ed09dRafael Espindola D->hasAttr<WeakRefAttr>() || 151240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) { 15137c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 15147c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 15157c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 15167c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1517bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1518bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1519b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1520b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 152134771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbarllvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, 152234771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar unsigned BuiltinID) { 15233e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 15241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 15253e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 15261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15273e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 15283e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 15293e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 15303e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 15311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::FunctionType *Ty = 1533386ca78d0b03b1fb519e60d1a14cd12a220364a6Eli Friedman cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); 1534bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 15351faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD), /*ForVTable=*/false); 1536bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1537bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 15387acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 15397acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 15407acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 15417acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 15427acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1543bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 15441d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 15451d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 15461d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 154770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 15481d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 15491d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 15502f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer llvm::StringRef String = Literal->getString(); 15512f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer unsigned NumBytes = String.size(); 15521d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1553f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1554f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1555f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 15562f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer return Map.GetOrCreateValue(String); 1557f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1558f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 15591d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 15601d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); 15612f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer const UTF8 *FromPtr = (UTF8 *)String.data(); 15621d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 15631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1564e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian (void)ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 1565e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian &ToPtr, ToPtr + NumBytes, 1566e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian strictConversion); 15671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 156870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 15691d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 157070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 157170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 157270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 157370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 157470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 157570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 157670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 157770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 157870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 157970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 158070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 158170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 158270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 158370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 158470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 158570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 158670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1587434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1588434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1589434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 159070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 15911d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 159270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); 15931d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 15941d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 15951d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 15961d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 15971d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 15981d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 15991d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 16001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 160170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 160270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 16031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16041d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 16051d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 16061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16070032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 16080032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 16093e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 16101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16119d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1612c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1613c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 161496e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 16151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 16169d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 16173e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 16183e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 16193c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1620c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 16211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1622e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 16233e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 16241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::StructType *STy = 1625e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1626e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 16275add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 162844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1629c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 16305add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 16311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1632c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 16333e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 16341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 16355add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 16365add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1637c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 16380032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1639a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 164095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1641278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner bool isConstant; 1642a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1643278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 164495b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1645278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // Note: -fwritable-strings doesn't make unicode CFStrings writable, but 1646278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // does make plain ascii ones writable. 1647278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = true; 1648a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 164995b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::PrivateLinkage; 1650278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = !Features.WritableStrings; 1651a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1652278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 16531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 1654278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 1655278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner ".str"); 1656b266a1fce09ab4ee7033268199509aacfbef056aRafael Espindola GV->setUnnamedAddr(true); 1657a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 16584da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 16594da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck GV->setAlignment(Align.getQuantity()); 1660a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 16615add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 16625add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1663c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1664c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 16655add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 16661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1667c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 166808e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 16691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 16701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 167195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 16728e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 16738e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 16741d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 16751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16760c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1677c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 167845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 167933e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanianllvm::Constant * 16804c73307c74764ba99e1379677fe92af72f676531Fariborz JahanianCodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) { 16812bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian unsigned StringLength = 0; 16822bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isUTF16 = false; 16832bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::StringMapEntry<llvm::Constant*> &Entry = 16842bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GetConstantCFStringEntry(CFConstantStringMap, Literal, 16852bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian getTargetData().isLittleEndian(), 16862bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isUTF16, StringLength); 16872bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16882bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (llvm::Constant *C = Entry.getValue()) 16892bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return C; 16902bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16912bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zero = 16922bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 16932bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zeros[] = { Zero, Zero }; 16942bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 1695ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian // If we don't already have it, get _NSConstantStringClassReference. 16964c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (!ConstantStringClassRef) { 16974c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string StringClass(getLangOptions().ObjCConstantStringClass); 16982bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 16992bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Ty = llvm::ArrayType::get(Ty, 0); 17004c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::Constant *GV; 17014c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (StringClass.empty()) 17024c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian GV = CreateRuntimeVariable(Ty, 17034c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Features.ObjCNonFragileABI ? 17044c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian "OBJC_CLASS_$_NSConstantString" : 17054c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian "_NSConstantStringClassReference"); 17064c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian else { 17074c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string str; 17084c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (Features.ObjCNonFragileABI) 17094c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian str = "OBJC_CLASS_$_" + StringClass; 17104c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian else 17114c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian str = "_" + StringClass + "ClassReference"; 17124c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian GV = CreateRuntimeVariable(Ty, str); 17134c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian } 17142bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Decay array -> ptr 17154c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian ConstantStringClassRef = 17164c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 17172bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 17182bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17192bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian QualType NSTy = getContext().getNSConstantStringType(); 17202bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17212bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::StructType *STy = 17222bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian cast<llvm::StructType>(getTypes().ConvertType(NSTy)); 17232bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17242bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian std::vector<llvm::Constant*> Fields(3); 17252bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17262bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Class pointer. 17274c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Fields[0] = ConstantStringClassRef; 17282bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17292bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String pointer. 17302bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 17312bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17322bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage; 17332bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isConstant; 17342bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (isUTF16) { 17352bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME: why do utf strings get "_" labels instead of "L" labels? 17362bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Linkage = llvm::GlobalValue::InternalLinkage; 17372bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Note: -fwritable-strings doesn't make unicode NSStrings writable, but 17382bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // does make plain ascii ones writable. 17392bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isConstant = true; 17402bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } else { 17412bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Linkage = llvm::GlobalValue::PrivateLinkage; 17422bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isConstant = !Features.WritableStrings; 17432bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 17442bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17452bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable *GV = 17462bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 17472bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian ".str"); 1748803d307a5385059b1a84dfe9706ab158c80a20dcRafael Espindola GV->setUnnamedAddr(true); 17492bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (isUTF16) { 17502bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 17512bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setAlignment(Align.getQuantity()); 17522bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 17532bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 17542bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17552bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String length. 17562bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 17572bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[2] = llvm::ConstantInt::get(Ty, StringLength); 17582bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17592bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // The struct. 17602bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian C = llvm::ConstantStruct::get(STy, Fields); 17612bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 17622bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable::PrivateLinkage, C, 17632bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian "_unnamed_nsstring_"); 17642bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME. Fix section. 1765ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian if (const char *Sect = 1766ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian Features.ObjCNonFragileABI 1767ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian ? getContext().Target.getNSStringNonFragileABISection() 1768ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian : getContext().Target.getNSStringSection()) 17692bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setSection(Sect); 17702bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Entry.setValue(GV); 17712bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17722bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return GV; 177333e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian} 177433e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian 17756143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 17761e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 17776143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 17783b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck const ASTContext &Context = getContext(); 17791e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 17803b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck Context.getAsConstantArrayType(E->getType()); 17811e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 17821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1783dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 17841e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 17851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1786dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 17873b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck RealLen *= Context.Target.getWCharWidth() / Context.getCharWidth(); 17881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17892f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer std::string Str = E->getString().str(); 17901e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 17911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17921e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 17931e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 17941e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 17956143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 17966143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 17976143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 17986143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 17996143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 18007eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 18017eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); 18027eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman if (S->isWide()) { 18037eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Type *DestTy = 18047eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); 18057eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman C = llvm::ConstantExpr::getBitCast(C, DestTy); 18067eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 18077eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman return C; 18086143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 18096143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1810eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1811eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1812eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1813eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1814eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1815eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1816a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1817a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1818eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1819eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1820eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1821a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 18221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 182345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 18245fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 18255fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 18266143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 18270032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 18280032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 18291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 183045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 18311257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalVariable *GV = 18321257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 18331257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalValue::PrivateLinkage, 18341257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola C, GlobalName); 18351257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola GV->setUnnamedAddr(true); 18361257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola return GV; 183745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 183845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 18396143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 18406143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 18416143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 18426143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 18436143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 18446143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 18456143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 18466143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 18475fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, 18485fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 18498e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 18508e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 18518e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 18528e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 185395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 18548e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 18558e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 18568e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 18575fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar return GenerateStringLiteral(str, false, *this, GlobalName); 18581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StringMapEntry<llvm::Constant *> &Entry = 186095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 186145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 186245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1863eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 186445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 186545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 18665fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); 186745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 186845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 186945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 18706143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 18716143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 18726143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 18736143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 18745fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, 18755fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 1876c9f29c61856ffb5f643cedbe87ac076f21a1381aChris Lattner return GetAddrOfConstantString(str + '\0', GlobalName); 18776143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 187841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1879af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1880af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 18811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 1882af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 18831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 188417945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 1885af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 18861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1887af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1888af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1889af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1890af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1891af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1892af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1893af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1894af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1895af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 189617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 1897fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1898fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1899af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 190017945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 1901fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1902fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1903af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1904af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1905af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1906af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1907109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// EmitObjCIvarInitializations - Emit information for ivar initialization 1908109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// for an implementation. 1909109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanianvoid CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { 1910109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian if (!Features.NeXTRuntime || D->getNumIvarInitializers() == 0) 1911109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian return; 1912109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian DeclContext* DC = const_cast<DeclContext*>(dyn_cast<DeclContext>(D)); 1913109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian assert(DC && "EmitObjCIvarInitializations - null DeclContext"); 1914109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); 1915109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 1916109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *DTORMethod = ObjCMethodDecl::Create(getContext(), 1917109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 1918109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 1919109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().VoidTy, 0, 19203fe104154dd2e8ffb351142d74f308938b5c99bfFariborz Jahanian DC, true, false, true, false, 1921109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 1922109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(DTORMethod); 1923109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); 1924109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1925109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian II = &getContext().Idents.get(".cxx_construct"); 1926109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian cxxSelector = getContext().Selectors.getSelector(0, &II); 1927109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian // The constructor returns 'self'. 1928109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), 1929109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 1930109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 1931109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().getObjCIdType(), 0, 19323fe104154dd2e8ffb351142d74f308938b5c99bfFariborz Jahanian DC, true, false, true, false, 1933109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 1934109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(CTORMethod); 1935109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); 1936109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1937109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1938109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian} 1939109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 194091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 1941984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 194217945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 1943984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 1944984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 1945984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 1946984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 194791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 194891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 1949f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 1950f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 195191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 195291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 195391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 195491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 195517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 195691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 195791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 195891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 195991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 196041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 196141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 196241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 196341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 196441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 196541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 196641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 196741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 196816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 196916e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 197016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 19711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 197241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 1973293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 19742b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 197541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 197616e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 197716e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 197816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 19791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1980555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 1981555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 1982555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 198341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 1984555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 198541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 198641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 198795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 198841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 1989984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 199041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 19919cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 19929d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 19939cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 1994dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 1995127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 1996127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 1997018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 19989cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 199995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 20001fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 20011fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 20021fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 20031fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 200495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 200595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 200627ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 200727ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 200827ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 200936674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 201036674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 201136674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 201236674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 201336674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 201495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 20151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 201638e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 201741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 201841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 2019b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 202041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 2021000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 2022000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian case Decl::ObjCCategory: { 2023000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D); 2024000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (CD->IsClassExtension() && CD->hasSynthBitfield()) 2025000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(CD->getClassInterface()); 2026000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian break; 2027000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian } 2028000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 2029285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 203041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 2031b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 203241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 203341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 203441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 2035af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 2036af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 203741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 203841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 203941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 2040af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 2041af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 2042000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (Features.ObjCNonFragileABI2 && OMD->hasSynthBitfield()) 2043000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(OMD->getClassInterface()); 2044af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 2045109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian EmitObjCIvarInitializations(OMD); 2046af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 204741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 20481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 204941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 205041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 205141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 20526fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 205341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 205441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 205541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 20561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 2057305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 205841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 205941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 206091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 206191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 206241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 206341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 206441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 206541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 20668d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer llvm::StringRef AsmString = AD->getAsmString()->getString(); 20671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 206841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 206941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 207041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 207141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 20728d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 207341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 207441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 20751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 2077f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 2078f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 2079f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 208041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 208141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 208241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 2083744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2084744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Turns the given pointer into a constant. 2085744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, 2086744016dde06fcffd50931e94a98c850f8b12cd87John McCall const void *Ptr) { 2087744016dde06fcffd50931e94a98c850f8b12cd87John McCall uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); 2088744016dde06fcffd50931e94a98c850f8b12cd87John McCall const llvm::Type *i64 = llvm::Type::getInt64Ty(Context); 2089744016dde06fcffd50931e94a98c850f8b12cd87John McCall return llvm::ConstantInt::get(i64, PtrInt); 2090744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2091744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2092744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic void EmitGlobalDeclMetadata(CodeGenModule &CGM, 2093744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *&GlobalMetadata, 2094744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl D, 2095744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr) { 2096744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (!GlobalMetadata) 2097744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata = 2098744016dde06fcffd50931e94a98c850f8b12cd87John McCall CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); 2099744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2100744016dde06fcffd50931e94a98c850f8b12cd87John McCall // TODO: should we report variant information for ctors/dtors? 2101744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Ops[] = { 2102744016dde06fcffd50931e94a98c850f8b12cd87John McCall Addr, 2103744016dde06fcffd50931e94a98c850f8b12cd87John McCall GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) 2104744016dde06fcffd50931e94a98c850f8b12cd87John McCall }; 2105744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops, 2)); 2106744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2107744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2108744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes associating all the global values in the 2109744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// current module with the Decls they came from. This is useful for 2110744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// projects using IR gen as a subroutine. 2111744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// 2112744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Since there's currently no way to associate an MDNode directly 2113744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with an llvm::GlobalValue, we create a global named metadata 2114744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with the name 'clang.global.decl.ptrs'. 2115744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenModule::EmitDeclMetadata() { 2116744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2117744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2118744016dde06fcffd50931e94a98c850f8b12cd87John McCall // StaticLocalDeclMap 2119744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<GlobalDecl,llvm::StringRef>::iterator 2120744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = MangledDeclNames.begin(), E = MangledDeclNames.end(); 2121744016dde06fcffd50931e94a98c850f8b12cd87John McCall I != E; ++I) { 2122744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); 2123744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); 2124744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2125744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2126744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2127744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes for all the local variables in the current 2128744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// function. 2129744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenFunction::EmitDeclMetadata() { 2130744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (LocalDeclMap.empty()) return; 2131744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2132744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::LLVMContext &Context = getLLVMContext(); 2133744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2134744016dde06fcffd50931e94a98c850f8b12cd87John McCall // Find the unique metadata ID for this name. 2135744016dde06fcffd50931e94a98c850f8b12cd87John McCall unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); 2136744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2137744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2138744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2139744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator 2140744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { 2141744016dde06fcffd50931e94a98c850f8b12cd87John McCall const Decl *D = I->first; 2142744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Addr = I->second; 2143744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2144744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { 2145744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); 2146744016dde06fcffd50931e94a98c850f8b12cd87John McCall Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, &DAddr, 1)); 2147744016dde06fcffd50931e94a98c850f8b12cd87John McCall } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { 2148744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); 2149744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); 2150744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2151744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2152744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2153673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2154673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@name Custom Runtime Function Interfaces 2155673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@{ 2156673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// 2157673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// FIXME: These can be eliminated once we can have clients just get the required 2158673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// AST nodes from the builtin tables. 2159673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2160673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectDispose() { 2161673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectDispose) 2162673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose; 2163673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2164754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2165754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectDisposeDecl) { 2166754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectDispose = GetAddrOfFunction( 2167754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl, 2168754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectDisposeDecl)); 2169754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2170754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2171754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2172673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::FunctionType *FTy; 2173673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar std::vector<const llvm::Type*> ArgTys; 2174673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); 2175d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall ArgTys.push_back(Int8PtrTy); 2176673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); 2177673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar FTy = llvm::FunctionType::get(ResultType, ArgTys, false); 2178673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose = 2179673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CreateRuntimeFunction(FTy, "_Block_object_dispose"); 2180673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2181673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2182673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectAssign() { 2183673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectAssign) 2184673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign; 2185673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2186754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2187754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectAssignDecl) { 2188754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectAssign = GetAddrOfFunction( 2189754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl, 2190754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectAssignDecl)); 2191754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2192754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2193754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2194673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::FunctionType *FTy; 2195673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar std::vector<const llvm::Type*> ArgTys; 2196673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); 2197d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall ArgTys.push_back(Int8PtrTy); 2198d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall ArgTys.push_back(Int8PtrTy); 2199673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); 2200673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar FTy = llvm::FunctionType::get(ResultType, ArgTys, false); 2201673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign = 2202673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CreateRuntimeFunction(FTy, "_Block_object_assign"); 2203673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2204673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2205673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteGlobalBlock() { 2206673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteGlobalBlock) 2207673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteGlobalBlock; 2208754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2209754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2210754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteGlobalBlockDecl) { 2211754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteGlobalBlock = GetAddrOfGlobalVar( 2212754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl, 2213754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteGlobalBlockDecl->getType())); 2214754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2215754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2216754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2217d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall return NSConcreteGlobalBlock = 2218d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall CreateRuntimeVariable(Int8PtrTy, "_NSConcreteGlobalBlock"); 2219673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2220673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2221673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteStackBlock() { 2222673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteStackBlock) 2223673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteStackBlock; 2224754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2225754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2226754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteStackBlockDecl) { 2227754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteStackBlock = GetAddrOfGlobalVar( 2228754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl, 2229754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteStackBlockDecl->getType())); 2230754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2231754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2232754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2233d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall return NSConcreteStackBlock = 2234d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall CreateRuntimeVariable(Int8PtrTy, "_NSConcreteStackBlock"); 2235673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2236673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2237673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@} 2238