CodeGenModule.cpp revision 4c73307c74764ba99e1379677fe92af72f676531
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" 215f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor#include "Mangle.h" 2282d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov#include "TargetInfo.h" 2306057cef0bcd7804e80f3ce2bbe352178396c715Chandler Carruth#include "clang/Frontend/CodeGenOptions.h" 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 25687cc4a850b59116efee061018f0d8df50728b82Ken Dyck#include "clang/AST/CharUnits.h" 26c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2721ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 28af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor#include "clang/AST/DeclTemplate.h" 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) 61bd3606426d389370616126af969904ec493cb105Chris Lattner : BlockModule(C, M, TD, Types, *this), Context(C), 622811ccf48d6d898c42cc4cfad37abedb36236d20Chandler Carruth Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), 63468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags), 64f16aa103d3afd42fbca2ab346f191bf745cec092John McCall ABI(createCXXABI(*this)), 65f16aa103d3afd42fbca2ab346f191bf745cec092John McCall Types(C, M, TD, getTargetCodeGenInfo().getABIInfo(), ABI), 663d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman TBAA(0), 67f16aa103d3afd42fbca2ab346f191bf745cec092John McCall VTables(*this), Runtime(0), 684c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian CFConstantStringClassRef(0), ConstantStringClassRef(0), 69673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar VMContext(M.getContext()), 70754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl(0), NSConcreteStackBlockDecl(0), 71673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar NSConcreteGlobalBlock(0), NSConcreteStackBlock(0), 72754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl(0), BlockObjectDisposeDecl(0), 73673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar BlockObjectAssign(0), BlockObjectDispose(0){ 74208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar 753c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner if (!Features.ObjC1) 763c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = 0; 773c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (!Features.NeXTRuntime) 783c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateGNUObjCRuntime(*this); 793c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (Features.ObjCNonFragileABI) 803c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacNonFragileABIObjCRuntime(*this); 813c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else 823c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacObjCRuntime(*this); 83e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 843d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman // Enable TBAA unless it's suppressed. 853d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!CodeGenOpts.RelaxedAliasing && CodeGenOpts.OptimizationLevel > 0) 860b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman TBAA = new CodeGenTBAA(Context, VMContext, getLangOptions(), 870b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman ABI.getMangleContext()); 883d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 89e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 9020f12a20ba9cfa6f8d53c8304e24f50903c45184Anders Carlsson DebugInfo = CodeGenOpts.DebugInfo ? new CGDebugInfo(*this) : 0; 912b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 922b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 932b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 94815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 95f16aa103d3afd42fbca2ab346f191bf745cec092John McCall delete &ABI; 964376c85fb0ac9e7fd779d246efc77e1169179138Dan Gohman delete TBAA; 97815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 98815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 99815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 1000d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnallvoid CodeGenModule::createObjCRuntime() { 1010d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall if (!Features.NeXTRuntime) 1020d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateGNUObjCRuntime(*this); 1030d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else if (Features.ObjCNonFragileABI) 1040d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateMacNonFragileABIObjCRuntime(*this); 1050d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else 1060d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateMacObjCRuntime(*this); 1070d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall} 1080d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall 109815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 11082227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 1116c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalInitFunc(); 112efb0fa9e11f75af51744a6159530ef7cc8efa24aDaniel Dunbar EmitCXXGlobalDtorFunc(); 113208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 114208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 115208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 1166bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 1176bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 118532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 1190269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 120744016dde06fcffd50931e94a98c850f8b12cd87John McCall 121b25938303de0976b9f189363d43033e5788e3d36John McCall SimplifyPersonality(); 122b25938303de0976b9f189363d43033e5788e3d36John McCall 123744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (getCodeGenOpts().EmitDeclMetadata) 124744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitDeclMetadata(); 125f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 126f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 1273d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanllvm::MDNode *CodeGenModule::getTBAAInfo(QualType QTy) { 1283d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!TBAA) 1293d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return 0; 1303d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return TBAA->getTBAAInfo(QTy); 1313d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1323d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1333d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanvoid CodeGenModule::DecorateInstruction(llvm::Instruction *Inst, 1343d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman llvm::MDNode *TBAAInfo) { 1353d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman Inst->setMetadata(llvm::LLVMContext::MD_tbaa, TBAAInfo); 1363d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1373d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1386374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCallbool CodeGenModule::isTargetDarwin() const { 1396374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall return getContext().Target.getTriple().getOS() == llvm::Triple::Darwin; 1406374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall} 1416374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 142488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 1432c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 14490df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 14590df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 14690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 14790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 14956b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 1502c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 1510a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 1520a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 1532c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 15458c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 155488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 156c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 15790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 15890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 15990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 16090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 16256b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 163c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 1640a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 165c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 166c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 1671eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpLangOptions::VisibilityMode 16804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel DunbarCodeGenModule::getDeclVisibilityMode(const Decl *D) const { 16904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 170d931b086984257de68868a64a235c2b4b34003fbJohn McCall if (VD->getStorageClass() == SC_PrivateExtern) 17104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 17204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 17340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) { 17404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (attr->getVisibility()) { 17504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar default: assert(0 && "Unknown visibility!"); 176cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt case VisibilityAttr::Default: 17704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Default; 178cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt case VisibilityAttr::Hidden: 17904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 180cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt case VisibilityAttr::Protected: 18104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Protected; 18204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar } 1837e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1847cf84d66965a7706004d8590b5af5fe54b85f525Douglas Gregor 185af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (getLangOptions().CPlusPlus) { 186af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor // Entities subject to an explicit instantiation declaration get default 187af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor // visibility. 188af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 189af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (Function->getTemplateSpecializationKind() 190af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor == TSK_ExplicitInstantiationDeclaration) 191af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor return LangOptions::Default; 192af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor } else if (const ClassTemplateSpecializationDecl *ClassSpec 193af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor = dyn_cast<ClassTemplateSpecializationDecl>(D)) { 194af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (ClassSpec->getSpecializationKind() 195af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor == TSK_ExplicitInstantiationDeclaration) 196af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor return LangOptions::Default; 197af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor } else if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) { 198af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (Record->getTemplateSpecializationKind() 199af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor == TSK_ExplicitInstantiationDeclaration) 200af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor return LangOptions::Default; 201af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor } else if (const VarDecl *Var = dyn_cast<VarDecl>(D)) { 202af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (Var->isStaticDataMember() && 203af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor (Var->getTemplateSpecializationKind() 204af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor == TSK_ExplicitInstantiationDeclaration)) 205af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor return LangOptions::Default; 206af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor } 207af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor 208af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor // If -fvisibility-inlines-hidden was provided, then inline C++ member 209af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor // functions get "hidden" visibility by default. 210af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (getLangOptions().InlineVisibilityHidden) 211af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) 212af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (Method->isInlined()) 213af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor return LangOptions::Hidden; 214af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor } 215af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor 216aa8b0d19244a6e7e8e5798fcc6aef003c274d3e0Eli Friedman // If this decl is contained in a class, it should have the same visibility 217aa8b0d19244a6e7e8e5798fcc6aef003c274d3e0Eli Friedman // as the parent class. 21839de84d671bac60662251e98f20a5a6039795dfcAnders Carlsson if (const DeclContext *DC = D->getDeclContext()) 219aa8b0d19244a6e7e8e5798fcc6aef003c274d3e0Eli Friedman if (DC->isRecord()) 220aa8b0d19244a6e7e8e5798fcc6aef003c274d3e0Eli Friedman return getDeclVisibilityMode(cast<Decl>(DC)); 22139de84d671bac60662251e98f20a5a6039795dfcAnders Carlsson 22204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return getLangOptions().getVisibilityMode(); 2234f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman} 2244f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman 2251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 22604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar const Decl *D) const { 22704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 228df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 2297e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 2306ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 2317e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 2326ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 23304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (getDeclVisibilityMode(D)) { 2347cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian default: assert(0 && "Unknown visibility!"); 23504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Default: 23604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 23704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Hidden: 23804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 23904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Protected: 24004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); 2417cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian } 2427cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 2437cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 244cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// Set the symbol visibility of type information (vtable and RTTI) 245cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// associated with the given type. 246cbfe50224b19119e759802bd0c1463269dffd09eJohn McCallvoid CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV, 247cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall const CXXRecordDecl *RD, 248cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall bool IsForRTTI) const { 249cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall setGlobalVisibility(GV, RD); 250cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 251279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakVTables) 252279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall return; 253279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall 254cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We want to drop the visibility to hidden for weak type symbols. 255cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // This isn't possible if there might be unresolved references 256cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // elsewhere that rely on this symbol being visible. 257cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2587a536907da776bdc47a704e7cafd641e8150e653John McCall // This should be kept roughly in sync with setThunkVisibility 2597a536907da776bdc47a704e7cafd641e8150e653John McCall // in CGVTables.cpp. 2607a536907da776bdc47a704e7cafd641e8150e653John McCall 261cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Preconditions. 262cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (GV->getLinkage() != llvm::GlobalVariable::WeakODRLinkage || 263cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->getVisibility() != llvm::GlobalVariable::DefaultVisibility) 264cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 265cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 266cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Don't override an explicit visibility attribute. 267cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (RD->hasAttr<VisibilityAttr>()) 268cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 269cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 270cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall switch (RD->getTemplateSpecializationKind()) { 271cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We have to disable the optimization if this is an EI definition 272cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // because there might be EI declarations in other shared objects. 273cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDefinition: 274cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDeclaration: 275cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 276cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2777a536907da776bdc47a704e7cafd641e8150e653John McCall // Every use of a non-template class's type information has to emit it. 278cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_Undeclared: 279cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 280cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2817a536907da776bdc47a704e7cafd641e8150e653John McCall // In theory, implicit instantiations can ignore the possibility of 2827a536907da776bdc47a704e7cafd641e8150e653John McCall // an explicit instantiation declaration because there necessarily 2837a536907da776bdc47a704e7cafd641e8150e653John McCall // must be an EI definition somewhere with default visibility. In 2847a536907da776bdc47a704e7cafd641e8150e653John McCall // practice, it's possible to have an explicit instantiation for 2857a536907da776bdc47a704e7cafd641e8150e653John McCall // an arbitrary template class, and linkers aren't necessarily able 2867a536907da776bdc47a704e7cafd641e8150e653John McCall // to deal with mixed-visibility symbols. 2877a536907da776bdc47a704e7cafd641e8150e653John McCall case TSK_ExplicitSpecialization: 288cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ImplicitInstantiation: 289279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakTemplateVTables) 2907a536907da776bdc47a704e7cafd641e8150e653John McCall return; 291cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 292cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall } 293cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 294cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // If there's a key function, there may be translation units 295cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // that don't have the key function's definition. But ignore 296cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // this if we're emitting RTTI under -fno-rtti. 297cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (!IsForRTTI || Features.RTTI) 298cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (Context.getKeyFunction(RD)) 299cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 300cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 301cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Otherwise, drop the visibility to hidden. 302cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 303cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall} 304cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 305793a990774826a0c20b0da66cec0991badfb8b63Anders Carlssonllvm::StringRef CodeGenModule::getMangledName(GlobalDecl GD) { 306793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 307793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 308793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; 309793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (!Str.empty()) 310793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 311793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 3124c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall if (!getCXXABI().getMangleContext().shouldMangleDeclName(ND)) { 313793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson IdentifierInfo *II = ND->getIdentifier(); 314793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson assert(II && "Attempt to mangle unnamed decl."); 315793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 316793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = II->getName(); 317793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 318793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson } 319793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 320793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::SmallString<256> Buffer; 321793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 3224c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Buffer); 323793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 3244c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Buffer); 325793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const BlockDecl *BD = dyn_cast<BlockDecl>(ND)) 3264c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleBlock(GD, BD, Buffer); 327793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else 3284c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleName(ND, Buffer); 329793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 330793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson // Allocate space for the mangled name. 331793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson size_t Length = Buffer.size(); 332793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson char *Name = MangledNamesAllocator.Allocate<char>(Length); 333793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson std::copy(Buffer.begin(), Buffer.end(), Name); 334793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 335793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = llvm::StringRef(Name, Length); 336793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 337793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 338793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson} 339793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 340564360be450b319aeafc26698be9811837bfb826Fariborz Jahanianvoid CodeGenModule::getMangledName(GlobalDecl GD, MangleBuffer &Buffer, 341564360be450b319aeafc26698be9811837bfb826Fariborz Jahanian const BlockDecl *BD) { 3424c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleBlock(GD, BD, Buffer.getBuffer()); 3439a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson} 3449a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson 345f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::GlobalValue *CodeGenModule::GetGlobalValue(llvm::StringRef Name) { 346f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return getModule().getNamedValue(Name); 3475f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 3485f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 3496d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 3506d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 3516bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 35249988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3536bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 3546d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3556d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 3566bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 3576bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 3586bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 35949988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3606bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 3616bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 3626bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3636bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 3646bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 3656bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 3661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 3676bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<const llvm::Type*>(), 3686bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar false); 36996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 3706bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3716bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 3721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType* CtorStructTy = 3731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), 37496e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 3756bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3766bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 3776bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 3786bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 3796bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 3801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 3810032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 3823c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 38308e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 3846bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 3856bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3866bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 38796e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 3881c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 389572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 3907db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 3911c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 3926d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 3936d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3946d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 395532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 396532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 397532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 398532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 399532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 400532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 40196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 402532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 403532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 4041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *gv = 4051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(TheModule, Array->getType(), false, 4061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::AppendingLinkage, Array, 4071c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.global.annotations"); 408532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 409532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 410532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 411d46f98573ba104eda102dd3224b2dca69f1c6336John McCallllvm::GlobalValue::LinkageTypes 412d46f98573ba104eda102dd3224b2dca69f1c6336John McCallCodeGenModule::getFunctionLinkage(const FunctionDecl *D) { 41390e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); 4147c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 415f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_Internal) 416d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::InternalLinkage; 417f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 418f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<DLLExportAttr>()) 419d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::DLLExportLinkage; 420f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 421f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<WeakAttr>()) 422d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::WeakAnyLinkage; 423f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 424f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 425f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition somewhere else, so we can use available_externally linkage. 426f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_C99Inline) 427d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::AvailableExternallyLinkage; 428f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 429f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C++, the compiler has to emit a definition in every translation unit 430f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // that references the function. We should use linkonce_odr because 431f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // a) if all references in this translation unit are optimized away, we 432f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 433f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 434f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition is dependable. 435f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 436d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::LinkOnceODRLinkage; 437f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 438f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // An explicit instantiation of a template has weak linkage, since 439f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // explicit instantiations can occur in multiple translation units 440f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // and must all be equivalent. However, we are not allowed to 441f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // throw away these explicit instantiations. 442f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_ExplicitTemplateInstantiation) 4438f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor return llvm::Function::WeakODRLinkage; 444f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 445f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // Otherwise, we have strong external linkage. 446f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner assert(Linkage == GVA_StrongExternal); 447f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner return llvm::Function::ExternalLinkage; 448d46f98573ba104eda102dd3224b2dca69f1c6336John McCall} 449d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 450d46f98573ba104eda102dd3224b2dca69f1c6336John McCall 451d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// SetFunctionDefinitionAttributes - Set attributes for a global. 452d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// 453d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// FIXME: This is currently only done for aliases and functions, but not for 454d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// variables (these details are set in EmitGlobalVarDefinition for variables). 455d46f98573ba104eda102dd3224b2dca69f1c6336John McCallvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 456d46f98573ba104eda102dd3224b2dca69f1c6336John McCall llvm::GlobalValue *GV) { 4577c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 458d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 459d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 4607dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 4611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 4627dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 463ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 464761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 465ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 466761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 467ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 468ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 469f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 470f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4717c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 4727c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 47374ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 4741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 475af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 47640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<AlwaysInlineAttr>()) 477af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 4781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 479dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar if (D->hasAttr<NakedAttr>()) 480dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar F->addFnAttr(llvm::Attribute::Naked); 481dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar 4821feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 48381ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 484f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 485fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson if (Features.getStackProtectorMode() == LangOptions::SSPOn) 486fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 487fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson else if (Features.getStackProtectorMode() == LangOptions::SSPReq) 488fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 489fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 490cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); 491cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt if (alignment) 492cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt F->setAlignment(alignment); 493cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt 494fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 495bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 496bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 497f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 498f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 5007c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 5017c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar setGlobalVisibility(GV, D); 5027c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 50340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 5047c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 5057c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 50640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 5077c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 50882d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 50982d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); 5107c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 5117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5120e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 5130e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 5140e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 5150e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 5160e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 5177c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5187c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 5197c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5200e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 521f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 522f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 523b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlssonvoid CodeGenModule::SetFunctionAttributes(GlobalDecl GD, 524c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 525c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 526b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); 527b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson 528c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 529b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); 5301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5317c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 5327c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 5331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 53440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 5357c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 5361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 53740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<WeakImportAttr>()) { 5387c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 5391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 5407c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 5417c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 5421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 5437c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 5447c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 54540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 5467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 547219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 548219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 5490269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 5501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 5510269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 55235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 5530269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5540269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5550269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 5560269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 557ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 5580269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 5590269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5603c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 5611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 56235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 56335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 56435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 56535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 5661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 5671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 568a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 56935f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 5701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 571c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 572c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 57396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 5741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 5761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 5770269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 5787db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 5791c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 5800269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5810269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 5820269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5830269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5840269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 58567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 58667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 58767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 588bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 589046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson while (!DeferredDeclsToEmit.empty() || !DeferredVTables.empty()) { 590046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson if (!DeferredVTables.empty()) { 591046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson const CXXRecordDecl *RD = DeferredVTables.back(); 592046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson DeferredVTables.pop_back(); 593046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson getVTables().GenerateClassData(getVTableLinkage(RD), RD); 594bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola continue; 595bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola } 596bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 5972a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 59867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 59967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 600c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // Check to see if we've already emitted this. This is necessary 601c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // for a couple of reasons: first, decls can end up in the 602c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // deferred-decls queue multiple times, and second, decls can end 603c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // up with definitions in unusual ways (e.g. by an extern inline 604c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // function acquiring a strong function redefinition). Just 605c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // ignore these cases. 606c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // 607c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // TODO: That said, looking this up multiple times is very wasteful. 6089a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef Name = getMangledName(D); 609f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *CGRef = GetGlobalValue(Name); 61067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 6111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 61267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 61367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 6141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 615c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // GlobalAlias::isDeclaration() defers to the aliasee, but for our 616c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // purposes an alias counts as a definition. 617c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall if (isa<llvm::GlobalAlias>(CGRef)) 618c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall continue; 619c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall 62067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 62167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 62267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 6235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 6268bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 6271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 6281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// GlobalValue being annotated. The second field is the constant string 6291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// created from the AnnotateAttr's annotation. The third field is a constant 6308bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 6318bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 6328bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6338bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 6348bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 6358bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 6378bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 6388bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 6398bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 6408bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6418bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 6428bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 6433c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); 6441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *anno = llvm::ConstantArray::get(VMContext, 6450032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson AA->getAnnotation(), true); 6460032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *unit = llvm::ConstantArray::get(VMContext, 6470032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson M->getModuleIdentifier(), 6488bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 6498bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6508bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 6518bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 6521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *annoGV = 65395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, anno->getType(), false, 65495b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, anno, 65595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GV->getName()); 6568bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 6578bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 65895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, unit->getType(), false, 6591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::PrivateLinkage, unit, 66095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ".str"); 6618bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 66257d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 6638bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 6643c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, SBP), 6653c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(annoGV, SBP), 6663c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(unitGV, SBP), 6670032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) 6688bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 66947a434ff3d49e7906eda88e8e8242e4297725b32Owen Anderson return llvm::ConstantStruct::get(VMContext, Fields, 4, false); 6708bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 6718bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 672a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidisbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 67390e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis // Never defer when EmitAllDecls is specified. 67490e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis if (Features.EmitAllDecls) 675a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidis return false; 6760b6bc8bd7a1d2a7d7478d13d78cff94cacad61fcDouglas Gregor 6774ac7c0bb39696e92fd220118fedc484c09a69870Argyrios Kyrtzidis return !getContext().DeclMustBeEmitted(Global); 67873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 67973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 6806a836706c40a31c716952b74785102c90fd6afa7Rafael Espindolallvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { 6816a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const AliasAttr *AA = VD->getAttr<AliasAttr>(); 6826a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola assert(AA && "No alias?"); 6836a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6846a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); 6856a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6866a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // See if there is already something with the target's name in the module. 687f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); 6886a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6896a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::Constant *Aliasee; 6906a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (isa<llvm::FunctionType>(DeclTy)) 691f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl()); 6926a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola else 693f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 6946a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::PointerType::getUnqual(DeclTy), 0); 6956a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (!Entry) { 6966a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); 6976a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola F->setLinkage(llvm::Function::ExternalWeakLinkage); 6986a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.insert(F); 6996a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 7006a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7016a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return Aliasee; 7026a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola} 7036a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 704b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 7054a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 7061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7076a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // Weak references don't produce any output by themselves. 7086a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (Global->hasAttr<WeakRefAttr>()) 7096a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return; 7106a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 711bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 712bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 71340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 714f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return EmitAliasDefinition(GD); 715219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 71667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 7175e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 718754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (FD->getIdentifier()) { 719754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = FD->getName(); 720754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_Block_object_assign") { 721754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl = FD; 722754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_Block_object_dispose") { 723754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl = FD; 724754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 725754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 726754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 72773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 72873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 72973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7300269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 7310269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 732bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 733bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 734754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (VD->getIdentifier()) { 735754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = VD->getName(); 736754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_NSConcreteGlobalBlock") { 737754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl = VD; 738754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_NSConcreteStackBlock") { 739754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl = VD; 740754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 741754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 742754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 743754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 744a9a55c063e9e59c6ab0a6d7a21302660f7bde9f9Douglas Gregor if (VD->isThisDeclarationADefinition() != VarDecl::Definition) 74573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7464c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 7474c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 74867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 74967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 7504357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (!MayDeferGeneration(Global)) { 7514357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Emit the definition if it can't be deferred. 7524357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner EmitGlobalDefinition(GD); 753bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 754bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 755bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall 756bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // If we're deferring emission of a C++ variable with an 757bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer, remember the order in which it appeared in the file. 758bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus && isa<VarDecl>(Global) && 759bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall cast<VarDecl>(Global)->hasInit()) { 760bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); 761bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall CXXGlobalInits.push_back(0); 762bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } 7634357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 7644357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // If the value has already been used, add it directly to the 7654357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit list. 7669a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 7674357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (GetGlobalValue(MangledName)) 7684357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDeclsToEmit.push_back(GD); 7694357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner else { 7704357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 7714357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // first use of the mangled name will cause it to move into 7724357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit. 7734357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDecls[MangledName] = GD; 7744357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner } 7754c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 7764c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 777b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 7784a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 7791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 780cb421fa690da545b58a720abe5f1c49b166dbde7Dan Gohman PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), 7818e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 7828e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 7838e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 78444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 78544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // At -O0, don't generate IR for functions with available_externally 78644eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // linkage. 7877feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor if (CodeGenOpts.OptimizationLevel == 0 && 7887feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor !Function->hasAttr<AlwaysInlineAttr>() && 78944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getFunctionLinkage(Function) 79044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor == llvm::Function::AvailableExternallyLinkage) 79144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return; 79244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor 79344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { 79444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (Method->isVirtual()) 79544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getVTables().EmitThunks(GD); 7967270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson 79744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) 79844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return EmitCXXConstructor(CD, GD.getCtorType()); 7994357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 80044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(Method)) 80144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return EmitCXXDestructor(DD, GD.getDtorType()); 80244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 803b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 804b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalFunctionDefinition(GD); 80544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 806b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 807b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 808b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalVarDefinition(VD); 8094357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 8104357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner assert(0 && "Invalid argument to EmitGlobalDefinition()"); 811bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 812bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 81374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 81474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 81574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 81674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 81774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 81874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 81974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 820f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 821f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMFunction(llvm::StringRef MangledName, 822f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *Ty, 823f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GlobalDecl D) { 8240558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 825f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 8260558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 8276a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 8286a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); 8296a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (FD && !FD->hasAttr<WeakAttr>()) 8307270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 8316a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8326a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 8336a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 8346a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8350558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 8360558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 8371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8380558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 83996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 8403c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, PTy); 8410558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 8421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 843654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 844654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 845654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 846654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 847784f21121a6c9418ebd86baa6814e36e1176c410John McCall 848784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::FunctionType *FTy; 849784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (isa<llvm::FunctionType>(Ty)) { 850784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = cast<llvm::FunctionType>(Ty); 851784f21121a6c9418ebd86baa6814e36e1176c410John McCall } else { 852784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 853784f21121a6c9418ebd86baa6814e36e1176c410John McCall std::vector<const llvm::Type*>(), false); 854654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 855654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 856bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 857784f21121a6c9418ebd86baa6814e36e1176c410John McCall llvm::Function *F = llvm::Function::Create(FTy, 858654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 859f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall MangledName, &getModule()); 860f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(F->getName() == MangledName && "name was uniqued!"); 861654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 862b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetFunctionAttributes(D, F, IsIncompleteFunction); 863654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 86467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 86567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 86667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 867f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 86867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 86967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 87067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 87167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 87267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 873b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner } else if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl())) { 8740c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // If this the first reference to a C++ inline function in a class, queue up 8750c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // the deferred function body for emission. These are not seen as 8760c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // top-level declarations. 877b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner if (FD->isThisDeclarationADefinition() && MayDeferGeneration(FD)) 878b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner DeferredDeclsToEmit.push_back(D); 879c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian // A called constructor which has no definition or declaration need be 880c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian // synthesized. 881c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(FD)) { 8827b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola if (CD->isImplicit()) { 883d3a344c55b89bad933c04ac59650f7afb95423e9Benjamin Kramer assert(CD->isUsed() && "Sema doesn't consider constructor as used."); 88415233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman DeferredDeclsToEmit.push_back(D); 8857b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 88615233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman } else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(FD)) { 8877b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola if (DD->isImplicit()) { 888d3a344c55b89bad933c04ac59650f7afb95423e9Benjamin Kramer assert(DD->isUsed() && "Sema doesn't consider destructor as used."); 88915233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman DeferredDeclsToEmit.push_back(D); 8907b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 89115233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman } else if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 8923e9438b5251a547253d64169863c2909b9b2772aDouglas Gregor if (MD->isImplicit() && MD->isCopyAssignmentOperator()) { 893d3a344c55b89bad933c04ac59650f7afb95423e9Benjamin Kramer assert(MD->isUsed() && "Sema doesn't consider CopyAssignment as used."); 894c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian DeferredDeclsToEmit.push_back(D); 8957b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 896c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian } 89767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 8981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 899784f21121a6c9418ebd86baa6814e36e1176c410John McCall // Make sure the result is of the requested type. 900784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (!IsIncompleteFunction) { 901784f21121a6c9418ebd86baa6814e36e1176c410John McCall assert(F->getType()->getElementType() == Ty); 902784f21121a6c9418ebd86baa6814e36e1176c410John McCall return F; 903784f21121a6c9418ebd86baa6814e36e1176c410John McCall } 904784f21121a6c9418ebd86baa6814e36e1176c410John McCall 905784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 906784f21121a6c9418ebd86baa6814e36e1176c410John McCall return llvm::ConstantExpr::getBitCast(F, PTy); 9070558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 9080558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 90974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 91074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 91174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 912b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 91374391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 91474391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 91574391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 9164a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 917bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 9189a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 919f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMFunction(MangledName, Ty, GD); 92074391b48b4791cded373683a3baf67314f358d50Chris Lattner} 92177ba708819285931932ecd33691a672bb59d221aEli Friedman 92274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 92374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 92474391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 92574391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 926f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 927b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); 92874391b48b4791cded373683a3baf67314f358d50Chris Lattner} 929bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 93020e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedmanstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D) { 93188786862424cb2d478516d911709dc19c962af9cJohn McCall if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) 93220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 93320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman if (Context.getLangOptions().CPlusPlus && 93420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman Context.getBaseElementType(D->getType())->getAs<RecordType>()) { 93520e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman // FIXME: We should do something fancier here! 93620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 93720e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 93820e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 93920e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 94020e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 94174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 94274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 94374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 94474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 94574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 94674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 94774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 948f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 949f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMGlobal(llvm::StringRef MangledName, 950f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::PointerType *Ty, 951f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const VarDecl *D) { 9523c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 953f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 95499b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 9556a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 9566a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (D && !D->hasAttr<WeakAttr>()) 9577270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 9586a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 9596a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 9606a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 9616a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 96274391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 963570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 9641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 96599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 9663c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 96799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 9681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 96967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 97067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 97167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 972f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 97367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 97467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 97567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 97667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 97767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 97867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 9791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 9811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 98299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 983f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 0, MangledName, 0, 98456ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 98549988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 98699b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 98774391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 988f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 989f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 99020e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman GV->setConstant(DeclIsConstantGlobal(Context, D)); 99149988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 99274391b48b4791cded373683a3baf67314f358d50Chris Lattner // FIXME: Merge with other attribute handling code. 993d931b086984257de68868a64a235c2b4b34003fbJohn McCall if (D->getStorageClass() == SC_PrivateExtern) 99404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 99549988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 9962c6899fa1a748fe211280de3dfb478be56a9be6aNAKAMURA Takumi if (D->hasAttr<DLLImportAttr>()) 9972c6899fa1a748fe211280de3dfb478be56a9be6aNAKAMURA Takumi GV->setLinkage(llvm::GlobalValue::DLLImportLinkage); 9982c6899fa1a748fe211280de3dfb478be56a9be6aNAKAMURA Takumi else if (D->hasAttr<WeakAttr>() || 99940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) 100074391b48b4791cded373683a3baf67314f358d50Chris Lattner GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 100156ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 100256ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 100374391b48b4791cded373683a3baf67314f358d50Chris Lattner } 10041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1005f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GV; 100674391b48b4791cded373683a3baf67314f358d50Chris Lattner} 1007eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 1008eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 100974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 101074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 101174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 101274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 101374391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 101474391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 101574391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 101674391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 101774391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 101874391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 10191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::PointerType *PTy = 102196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 1022f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 10239a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1024f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMGlobal(MangledName, PTy, D); 102574391b48b4791cded373683a3baf67314f358d50Chris Lattner} 10263f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 102774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 102874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 102974391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 103074391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 1031f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 103296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0); 1033bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1034bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 103503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 103603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 103703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 10387520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 10397520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 10407520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 10417520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 10429a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1043f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (!GetGlobalValue(MangledName)) { 1044555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 104503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 10467520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 10477520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 10487520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 10497520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 105003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 105103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 105203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 10536fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregorvoid CodeGenModule::EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired) { 10546fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor if (DefinitionRequired) 10556fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor getVTables().GenerateClassData(getVTableLinkage(Class), Class); 10566fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor} 10576fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor 10584b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregorllvm::GlobalVariable::LinkageTypes 1059046c294a43024874ff35656c6e785b64e72f1f36Anders CarlssonCodeGenModule::getVTableLinkage(const CXXRecordDecl *RD) { 1060dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (RD->isInAnonymousNamespace() || !RD->hasLinkage()) 1061dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::InternalLinkage; 1062dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1063dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (const CXXMethodDecl *KeyFunction 1064dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor = RD->getASTContext().getKeyFunction(RD)) { 1065dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // If this class has a key function, use that to determine the linkage of 1066dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // the vtable. 10674b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor const FunctionDecl *Def = 0; 106806a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (KeyFunction->hasBody(Def)) 10694b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor KeyFunction = cast<CXXMethodDecl>(Def); 1070dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 10714b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor switch (KeyFunction->getTemplateSpecializationKind()) { 10724b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_Undeclared: 10734b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitSpecialization: 10744b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->isInlined()) 10754b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10764b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10774b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::ExternalLinkage; 10784b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10794b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ImplicitInstantiation: 10804b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDefinition: 10814b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10824b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10834b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 10844b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // FIXME: Use available_externally linkage. However, this currently 10854b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // breaks LLVM's build due to undefined symbols. 10864b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 10874b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10884b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 1089dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor } 1090dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1091dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor switch (RD->getTemplateSpecializationKind()) { 1092dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_Undeclared: 1093dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitSpecialization: 1094dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ImplicitInstantiation: 1095dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitInstantiationDefinition: 1096dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 1097dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1098dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitInstantiationDeclaration: 1099dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // FIXME: Use available_externally linkage. However, this currently 1100dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // breaks LLVM's build due to undefined symbols. 1101dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 11024b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 11034b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 11044b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 11054b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // Silence GCC warning. 11064b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 11074b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor} 11084b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 1109687cc4a850b59116efee061018f0d8df50728b82Ken DyckCharUnits CodeGenModule::GetTargetTypeStoreSize(const llvm::Type *Ty) const { 1110687cc4a850b59116efee061018f0d8df50728b82Ken Dyck return CharUnits::fromQuantity( 1111687cc4a850b59116efee061018f0d8df50728b82Ken Dyck TheTargetData.getTypeStoreSizeInBits(Ty) / Context.getCharWidth()); 1112687cc4a850b59116efee061018f0d8df50728b82Ken Dyck} 1113687cc4a850b59116efee061018f0d8df50728b82Ken Dyck 1114bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 11158f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 111677ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 11176c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman bool NonConstInit = false; 11181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 111931310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl const Expr *InitExpr = D->getAnyInitializer(); 11203bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson 11213bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson if (!InitExpr) { 1122cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 112303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 112403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 112503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 112603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 112703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 112803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 112903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 113003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 113103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 1132b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 113377ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 1134c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor Init = EmitConstantExpr(InitExpr, D->getType()); 11356e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 11363bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson QualType T = InitExpr->getType(); 1137c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor if (D->getType()->isReferenceType()) 1138c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor T = D->getType(); 1139c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor 114089ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 11416c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalVarDeclInitFunc(D); 114289ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 11436c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman NonConstInit = true; 114489ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 114589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 114689ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 114789ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 1148bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } else { 1149bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // We don't need an initializer, so remove the entry for the delayed 1150bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer position (just in case this entry was delayed). 1151bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus) 1152bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition.erase(D); 11536e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 11548f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 11558e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 11562d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 1157570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 11581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1159570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 1160570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 11619d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 11629d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 11639d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 1164570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 1165570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 11661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1167570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 1168570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 11691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1170570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 1171570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 1172570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 1173570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 1174570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 1175570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 1176570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 1177570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 1178570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 1179570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 1180570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 1181570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { 11821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1183f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // Move the old entry aside so that we'll create a new one. 1184f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Entry->setName(llvm::StringRef()); 1185232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 1186570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 1187570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 11880558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 118977ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 11901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 11913c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 1192570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 119377ba708819285931932ecd33691a672bb59d221aEli Friedman 119477ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 1195570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 119677ba708819285931932ecd33691a672bb59d221aEli Friedman } 119777ba708819285931932ecd33691a672bb59d221aEli Friedman 119840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 11998bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 12008bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 1201f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 12028bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 12038bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 120488a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 1205e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 1206e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 1207e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 12086c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman if (!NonConstInit && DeclIsConstantGlobal(Context, D)) 1209e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 12101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12118b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); 121208d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman 121388a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 121490e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); 1215a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 12168fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 121740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1218ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLImportLinkage); 121940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1220ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLExportLinkage); 1221e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1222e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1223e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setLinkage(llvm::GlobalVariable::WeakODRLinkage); 1224e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1225e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 12268f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor } else if (Linkage == GVA_TemplateInstantiation || 12278f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor Linkage == GVA_ExplicitTemplateInstantiation) 12288f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor // FIXME: It seems like we can provide more specific linkage here 12298f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor // (LinkOnceODR, WeakODR). 12301028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 12311bc5c03a7f08b04f4ac26abd705418aaf4109062Daniel Dunbar else if (!getLangOptions().CPlusPlus && !CodeGenOpts.NoCommon && 1232309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 123391f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher !D->getAttr<SectionAttr>() && !D->isThreadSpecified()) { 123491f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher // Thread local vars aren't considered common linkage. 123504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::CommonLinkage); 1236e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // common vars aren't constant even if declared const. 1237e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 1238e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner } else 123904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); 12407e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar 12417c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 124204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 1243686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta // Emit global variable debug information. 12442d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner if (CGDebugInfo *DI = getDebugInfo()) { 124566031a5594bc9a7dc0dc5137c3e7955f835e4639Daniel Dunbar DI->setLocation(D->getLocation()); 1246686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta DI->EmitGlobalVariable(GV, D); 1247686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 124888a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 12495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1250bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1251bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1252bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1253bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1254bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1255bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1256bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1257bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1258bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1259bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1260bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1261bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1262bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1263bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 12641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1265bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 1266bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 1267bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1268bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1269dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer UI != E; ) { 1270bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 1271dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::Value::use_iterator I = UI++; // Increment before the CI is erased. 1272dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*I); 12738670cd3ea4dfbf86caacd270ec2441e9949bbb6aGabor Greif if (!CI) continue; // FIXME: when we allow Invoke, just do CallSite CS(*I) 127435db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif llvm::CallSite CS(CI); 1275dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer if (!CI || !CS.isCallee(I)) continue; 12761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1277bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1278bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1279bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1280bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1281bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1282bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1283bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1284bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1285bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1286bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1287bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1288bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 128935db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif if (CS.arg_size() == ArgNo || 129035db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif CS.getArgument(ArgNo)->getType() != AI->getType()) { 1291bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1292bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1293bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1294bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1295bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1296bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 12971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1298bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1299bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 13006ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif ArgList.append(CS.arg_begin(), CS.arg_begin() + ArgNo); 1301bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 1302bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 1303bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1304ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1305bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 1306bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 1307ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1308bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1309bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 131000549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 131100549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 13123b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1313c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner // Copy debug location attached to CI. 1314c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner if (!CI->getDebugLoc().isUnknown()) 1315c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner NewCall->setDebugLoc(CI->getDebugLoc()); 1316bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1317bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1318bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1319bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1320bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1321b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 1322b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 1323c0bf462cf35fe050bddbd8bff967298e4a67e79dJohn McCall const llvm::FunctionType *Ty = getTypes().GetFunctionType(GD); 13244c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleInitDiscriminator(); 13259fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1326b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 13271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13280558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 13290558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 13300558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 13310558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 13320558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 13331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13350558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1336bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 13371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 133842745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1339bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 13400558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 134134809507232bc4c3c4840c7d092c7440219fddafChris Lattner 134262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 134362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 134462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 134562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 134662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 134762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 1348f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // (e.g. "int f(int x)"). Move the old function aside so that it 1349f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // doesn't interfere with GetAddrOfFunction. 1350f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall OldFn->setName(llvm::StringRef()); 1351b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 13521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1353bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1354bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1355bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 13569fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1357bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 13589fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 13599fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 13601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 136162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1362bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 13631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 13643c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1365bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1366bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 13671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 136862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1369bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 13701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13710558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1372bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 13731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13740558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 13758b2423361648c39a7d8a3c5e8129e12006deac32John McCall setFunctionLinkage(D, Fn); 1376bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1377219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 13786379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 13797c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 13807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 13811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 138240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1383219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 138440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1385219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1386bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1387bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1388f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallvoid CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { 1389f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 139040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1391bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1392bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 13939a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 1394f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1395f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // If there is a definition in the module, then it wins over the alias. 1396f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // This is dubious, but allow it to be safe. Just ignore the alias. 1397f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 1398f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (Entry && !Entry->isDeclaration()) 1399f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return; 14001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1401f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1402bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1403bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1404bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1405bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1406bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 1407f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl()); 1408bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1409f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 141096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1411bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1412bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 14131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1414bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1415bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1416bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 14171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1418bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1419f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(Entry->isDeclaration()); 1420f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1421bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1422bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1423bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1424bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1425bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1426bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1427bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1428f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GA->takeName(Entry); 14291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14303c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1431bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1432bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1433f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall } else { 14349a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson GA->setName(MangledName); 1435bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 14361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14377c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 14387c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 14397c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 144040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 14417c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 14427c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 144306a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (FD->hasBody()) 14447c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 14457c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 14467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 14477c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 14481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 144911e8ce7380856abee188b237c2600272df2ed09dRafael Espindola D->hasAttr<WeakRefAttr>() || 145040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) { 14517c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 14527c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 14537c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 14547c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1455bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1456bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1457b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1458b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 145934771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbarllvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, 146034771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar unsigned BuiltinID) { 14613e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 14621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 14633e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 14641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14653e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 14663e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 14673e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 14683e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 14691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::FunctionType *Ty = 1471386ca78d0b03b1fb519e60d1a14cd12a220364a6Eli Friedman cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); 1472bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 147334771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD)); 1474bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1475bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 14767acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 14777acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 14787acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 14797acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 14807acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1481bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 14823ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 14833ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wangllvm::Function *CodeGenModule::getMemCpyFn(const llvm::Type *DestType, 14843ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *SrcType, 14853ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *SizeType) { 14863ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *ArgTypes[3] = {DestType, SrcType, SizeType }; 14873ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang return getIntrinsic(llvm::Intrinsic::memcpy, ArgTypes, 3); 14885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1489c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 14903ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wangllvm::Function *CodeGenModule::getMemMoveFn(const llvm::Type *DestType, 14913ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *SrcType, 14923ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *SizeType) { 14933ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *ArgTypes[3] = {DestType, SrcType, SizeType }; 14943ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang return getIntrinsic(llvm::Intrinsic::memmove, ArgTypes, 3); 14950c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman} 14960c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman 14973ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wangllvm::Function *CodeGenModule::getMemSetFn(const llvm::Type *DestType, 14983ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *SizeType) { 14993ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *ArgTypes[2] = { DestType, SizeType }; 15003ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang return getIntrinsic(llvm::Intrinsic::memset, ArgTypes, 2); 150141ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio} 15027acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner 15031d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 15041d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 15051d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 150670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 15071d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 15081d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 15092f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer llvm::StringRef String = Literal->getString(); 15102f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer unsigned NumBytes = String.size(); 15111d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1512f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1513f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1514f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 15152f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer return Map.GetOrCreateValue(String); 1516f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1517f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 15181d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 15191d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); 15202f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer const UTF8 *FromPtr = (UTF8 *)String.data(); 15211d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 15221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1523e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian (void)ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 1524e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian &ToPtr, ToPtr + NumBytes, 1525e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian strictConversion); 15261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 152770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 15281d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 152970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 153070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 153170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 153270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 153370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 153470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 153570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 153670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 153770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 153870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 153970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 154070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 154170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 154270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 154370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 154470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 154570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1546434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1547434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1548434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 154970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 15501d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 155170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); 15521d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 15531d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 15541d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 15551d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 15561d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 15571d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 15581d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 15591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 156070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 156170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 15621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15631d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 15641d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 15651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15660032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 15670032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 15683e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 15691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15709d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1571c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1572c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 157396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 15741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 15759d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 15763e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 15773e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 15783c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1579c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 15801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1581e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 15823e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 15831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::StructType *STy = 1584e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1585e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 15865add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 158744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1588c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 15895add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 15901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1591c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 15923e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 15931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 15945add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 15955add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1596c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 15970032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1598a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 159995b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1600278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner bool isConstant; 1601a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1602278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 160395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1604278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // Note: -fwritable-strings doesn't make unicode CFStrings writable, but 1605278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // does make plain ascii ones writable. 1606278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = true; 1607a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 160895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::PrivateLinkage; 1609278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = !Features.WritableStrings; 1610a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1611278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 16121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 1613278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 1614278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner ".str"); 1615a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 16164da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 16174da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck GV->setAlignment(Align.getQuantity()); 1618a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 16195add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 16205add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1621c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1622c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 16235add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 16241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1625c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 162608e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 16271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 16281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 162995b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 16308e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 16318e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 16321d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 16331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16340c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1635c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 163645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 163733e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanianllvm::Constant * 16384c73307c74764ba99e1379677fe92af72f676531Fariborz JahanianCodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) { 16392bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian unsigned StringLength = 0; 16402bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isUTF16 = false; 16412bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::StringMapEntry<llvm::Constant*> &Entry = 16422bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GetConstantCFStringEntry(CFConstantStringMap, Literal, 16432bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian getTargetData().isLittleEndian(), 16442bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isUTF16, StringLength); 16452bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16462bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (llvm::Constant *C = Entry.getValue()) 16472bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return C; 16482bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16492bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zero = 16502bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 16512bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zeros[] = { Zero, Zero }; 16522bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 1653ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian // If we don't already have it, get _NSConstantStringClassReference. 16544c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (!ConstantStringClassRef) { 16554c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string StringClass(getLangOptions().ObjCConstantStringClass); 16562bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 16572bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Ty = llvm::ArrayType::get(Ty, 0); 16584c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::Constant *GV; 16594c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (StringClass.empty()) 16604c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian GV = CreateRuntimeVariable(Ty, 16614c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Features.ObjCNonFragileABI ? 16624c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian "OBJC_CLASS_$_NSConstantString" : 16634c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian "_NSConstantStringClassReference"); 16644c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian else { 16654c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string str; 16664c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (Features.ObjCNonFragileABI) 16674c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian str = "OBJC_CLASS_$_" + StringClass; 16684c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian else 16694c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian str = "_" + StringClass + "ClassReference"; 16704c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian GV = CreateRuntimeVariable(Ty, str); 16714c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian } 16722bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Decay array -> ptr 16734c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian ConstantStringClassRef = 16744c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 16752bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 16762bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16772bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian QualType NSTy = getContext().getNSConstantStringType(); 16782bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16792bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::StructType *STy = 16802bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian cast<llvm::StructType>(getTypes().ConvertType(NSTy)); 16812bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16822bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian std::vector<llvm::Constant*> Fields(3); 16832bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16842bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Class pointer. 16854c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Fields[0] = ConstantStringClassRef; 16862bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16872bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String pointer. 16882bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 16892bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16902bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage; 16912bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isConstant; 16922bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (isUTF16) { 16932bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME: why do utf strings get "_" labels instead of "L" labels? 16942bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Linkage = llvm::GlobalValue::InternalLinkage; 16952bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Note: -fwritable-strings doesn't make unicode NSStrings writable, but 16962bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // does make plain ascii ones writable. 16972bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isConstant = true; 16982bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } else { 16992bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Linkage = llvm::GlobalValue::PrivateLinkage; 17002bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isConstant = !Features.WritableStrings; 17012bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 17022bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17032bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable *GV = 17042bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 17052bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian ".str"); 17062bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (isUTF16) { 17072bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 17082bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setAlignment(Align.getQuantity()); 17092bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 17102bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 17112bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17122bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String length. 17132bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 17142bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[2] = llvm::ConstantInt::get(Ty, StringLength); 17152bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17162bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // The struct. 17172bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian C = llvm::ConstantStruct::get(STy, Fields); 17182bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 17192bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable::PrivateLinkage, C, 17202bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian "_unnamed_nsstring_"); 17212bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME. Fix section. 1722ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian if (const char *Sect = 1723ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian Features.ObjCNonFragileABI 1724ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian ? getContext().Target.getNSStringNonFragileABISection() 1725ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian : getContext().Target.getNSStringSection()) 17262bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setSection(Sect); 17272bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Entry.setValue(GV); 17282bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17292bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return GV; 173033e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian} 173133e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian 17326143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 17331e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 17346143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 17351e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 17361e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar getContext().getAsConstantArrayType(E->getType()); 17371e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 17381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1739dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 17401e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 17411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1742dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 1743dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner RealLen *= getContext().Target.getWCharWidth()/8; 17441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17452f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer std::string Str = E->getString().str(); 17461e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 17471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17481e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 17491e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 17501e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 17516143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 17526143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 17536143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 17546143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 17556143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 17567eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 17577eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); 17587eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman if (S->isWide()) { 17597eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Type *DestTy = 17607eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); 17617eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman C = llvm::ConstantExpr::getBitCast(C, DestTy); 17627eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 17637eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman return C; 17646143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 17656143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1766eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1767eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1768eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1769eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1770eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1771eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1772a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1773a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1774eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1775eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1776eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1777a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 17781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 177945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 17805fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 17815fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 17826143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 17830032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 17840032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 17851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 178645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 17871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 178895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, 17891c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson C, GlobalName); 179045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 179145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 17926143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 17936143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 17946143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 17956143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 17966143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 17976143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 17986143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 17996143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 18005fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, 18015fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 18028e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 18038e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 18048e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 18058e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 180695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 18078e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 18088e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 18098e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 18105fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar return GenerateStringLiteral(str, false, *this, GlobalName); 18111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StringMapEntry<llvm::Constant *> &Entry = 181395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 181445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 181545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1816eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 181745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 181845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 18195fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); 182045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 182145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 182245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 18236143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 18246143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 18256143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 18266143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 18275fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, 18285fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 1829c9f29c61856ffb5f643cedbe87ac076f21a1381aChris Lattner return GetAddrOfConstantString(str + '\0', GlobalName); 18306143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 183141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1832af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1833af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 18341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 1835af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 18361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 183717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 1838af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 18391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1840af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1841af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1842af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1843af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1844af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1845af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1846af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1847af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1848af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 184917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 1850fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1851fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1852af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 185317945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 1854fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1855fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1856af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1857af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1858af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1859af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1860109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// EmitObjCIvarInitializations - Emit information for ivar initialization 1861109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// for an implementation. 1862109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanianvoid CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { 1863109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian if (!Features.NeXTRuntime || D->getNumIvarInitializers() == 0) 1864109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian return; 1865109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian DeclContext* DC = const_cast<DeclContext*>(dyn_cast<DeclContext>(D)); 1866109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian assert(DC && "EmitObjCIvarInitializations - null DeclContext"); 1867109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); 1868109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 1869109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *DTORMethod = ObjCMethodDecl::Create(getContext(), 1870109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 1871109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 1872109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().VoidTy, 0, 18733fe104154dd2e8ffb351142d74f308938b5c99bfFariborz Jahanian DC, true, false, true, false, 1874109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 1875109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(DTORMethod); 1876109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); 1877109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1878109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian II = &getContext().Idents.get(".cxx_construct"); 1879109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian cxxSelector = getContext().Selectors.getSelector(0, &II); 1880109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian // The constructor returns 'self'. 1881109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), 1882109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 1883109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 1884109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().getObjCIdType(), 0, 18853fe104154dd2e8ffb351142d74f308938b5c99bfFariborz Jahanian DC, true, false, true, false, 1886109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 1887109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(CTORMethod); 1888109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); 1889109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1890109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1891109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian} 1892109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 189391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 1894984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 189517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 1896984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 1897984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 1898984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 1899984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 190091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 190191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 1902f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 1903f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 190491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 190591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 190691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 190791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 190817945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 190991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 191091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 191191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 191291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 191341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 191441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 191541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 191641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 191741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 191841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 191941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 192041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 192116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 192216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 192316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 19241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 192541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 1926293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 19272b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 192841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 192916e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 193016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 193116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 19321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1933555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 1934555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 1935555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 193641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 1937555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 193841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 193941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 194095d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 194141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 1942984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 194341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 19449cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 19459d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 19469cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 1947dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 1948127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 1949127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 1950018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 19519cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 195295d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 19531fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 19541fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 19551fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 19561fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 195795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 195895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 195927ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 196027ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 196127ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 196236674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 196336674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 196436674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 196536674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 196636674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 196795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 19681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 196938e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 197041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 197141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 1972b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 197341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1974000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 1975000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian case Decl::ObjCCategory: { 1976000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D); 1977000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (CD->IsClassExtension() && CD->hasSynthBitfield()) 1978000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(CD->getClassInterface()); 1979000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian break; 1980000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian } 1981000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 1982285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 198341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 1984b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 198541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 198641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 198741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 1988af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 1989af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 199041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 199141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 199241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1993af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 1994af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 1995000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (Features.ObjCNonFragileABI2 && OMD->hasSynthBitfield()) 1996000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(OMD->getClassInterface()); 1997af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 1998109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian EmitObjCIvarInitializations(OMD); 1999af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 200041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 20011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 200241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 200341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 200441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 20056fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 200641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 200741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 200841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 20091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 2010305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 201141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 201241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 201391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 201491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 201541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 201641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 201741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 201841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 20198d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer llvm::StringRef AsmString = AD->getAsmString()->getString(); 20201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 202141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 202241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 202341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 202441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 20258d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 202641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 202741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 20281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 2030f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 2031f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 2032f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 203341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 203441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 203541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 2036744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2037744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Turns the given pointer into a constant. 2038744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, 2039744016dde06fcffd50931e94a98c850f8b12cd87John McCall const void *Ptr) { 2040744016dde06fcffd50931e94a98c850f8b12cd87John McCall uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); 2041744016dde06fcffd50931e94a98c850f8b12cd87John McCall const llvm::Type *i64 = llvm::Type::getInt64Ty(Context); 2042744016dde06fcffd50931e94a98c850f8b12cd87John McCall return llvm::ConstantInt::get(i64, PtrInt); 2043744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2044744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2045744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic void EmitGlobalDeclMetadata(CodeGenModule &CGM, 2046744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *&GlobalMetadata, 2047744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl D, 2048744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr) { 2049744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (!GlobalMetadata) 2050744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata = 2051744016dde06fcffd50931e94a98c850f8b12cd87John McCall CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); 2052744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2053744016dde06fcffd50931e94a98c850f8b12cd87John McCall // TODO: should we report variant information for ctors/dtors? 2054744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Ops[] = { 2055744016dde06fcffd50931e94a98c850f8b12cd87John McCall Addr, 2056744016dde06fcffd50931e94a98c850f8b12cd87John McCall GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) 2057744016dde06fcffd50931e94a98c850f8b12cd87John McCall }; 2058744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops, 2)); 2059744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2060744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2061744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes associating all the global values in the 2062744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// current module with the Decls they came from. This is useful for 2063744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// projects using IR gen as a subroutine. 2064744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// 2065744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Since there's currently no way to associate an MDNode directly 2066744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with an llvm::GlobalValue, we create a global named metadata 2067744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with the name 'clang.global.decl.ptrs'. 2068744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenModule::EmitDeclMetadata() { 2069744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2070744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2071744016dde06fcffd50931e94a98c850f8b12cd87John McCall // StaticLocalDeclMap 2072744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<GlobalDecl,llvm::StringRef>::iterator 2073744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = MangledDeclNames.begin(), E = MangledDeclNames.end(); 2074744016dde06fcffd50931e94a98c850f8b12cd87John McCall I != E; ++I) { 2075744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); 2076744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); 2077744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2078744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2079744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2080744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes for all the local variables in the current 2081744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// function. 2082744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenFunction::EmitDeclMetadata() { 2083744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (LocalDeclMap.empty()) return; 2084744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2085744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::LLVMContext &Context = getLLVMContext(); 2086744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2087744016dde06fcffd50931e94a98c850f8b12cd87John McCall // Find the unique metadata ID for this name. 2088744016dde06fcffd50931e94a98c850f8b12cd87John McCall unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); 2089744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2090744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2091744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2092744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator 2093744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { 2094744016dde06fcffd50931e94a98c850f8b12cd87John McCall const Decl *D = I->first; 2095744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Addr = I->second; 2096744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2097744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { 2098744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); 2099744016dde06fcffd50931e94a98c850f8b12cd87John McCall Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, &DAddr, 1)); 2100744016dde06fcffd50931e94a98c850f8b12cd87John McCall } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { 2101744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); 2102744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); 2103744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2104744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2105744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2106673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2107673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@name Custom Runtime Function Interfaces 2108673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@{ 2109673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// 2110673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// FIXME: These can be eliminated once we can have clients just get the required 2111673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// AST nodes from the builtin tables. 2112673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2113673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectDispose() { 2114673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectDispose) 2115673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose; 2116673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2117754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2118754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectDisposeDecl) { 2119754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectDispose = GetAddrOfFunction( 2120754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl, 2121754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectDisposeDecl)); 2122754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2123754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2124754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2125673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::FunctionType *FTy; 2126673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar std::vector<const llvm::Type*> ArgTys; 2127673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); 2128673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(PtrToInt8Ty); 2129673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); 2130673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar FTy = llvm::FunctionType::get(ResultType, ArgTys, false); 2131673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose = 2132673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CreateRuntimeFunction(FTy, "_Block_object_dispose"); 2133673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2134673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2135673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectAssign() { 2136673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectAssign) 2137673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign; 2138673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2139754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2140754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectAssignDecl) { 2141754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectAssign = GetAddrOfFunction( 2142754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl, 2143754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectAssignDecl)); 2144754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2145754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2146754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2147673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::FunctionType *FTy; 2148673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar std::vector<const llvm::Type*> ArgTys; 2149673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); 2150673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(PtrToInt8Ty); 2151673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(PtrToInt8Ty); 2152673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); 2153673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar FTy = llvm::FunctionType::get(ResultType, ArgTys, false); 2154673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign = 2155673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CreateRuntimeFunction(FTy, "_Block_object_assign"); 2156673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2157673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2158673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteGlobalBlock() { 2159673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteGlobalBlock) 2160673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteGlobalBlock; 2161754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2162754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2163754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteGlobalBlockDecl) { 2164754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteGlobalBlock = GetAddrOfGlobalVar( 2165754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl, 2166754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteGlobalBlockDecl->getType())); 2167754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2168754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2169754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2170673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteGlobalBlock = CreateRuntimeVariable( 2171673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar PtrToInt8Ty, "_NSConcreteGlobalBlock"); 2172673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2173673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2174673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteStackBlock() { 2175673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteStackBlock) 2176673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteStackBlock; 2177754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2178754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2179754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteStackBlockDecl) { 2180754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteStackBlock = GetAddrOfGlobalVar( 2181754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl, 2182754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteStackBlockDecl->getType())); 2183754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2184754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2185754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2186673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteStackBlock = CreateRuntimeVariable( 2187673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar PtrToInt8Ty, "_NSConcreteStackBlock"); 2188673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2189673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2190673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@} 2191