CodeGenModule.cpp revision 20e098b7e7fda6bed1d67441b56cce77cd3aa918
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" 170dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar#include "CGCall.h" 18af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar#include "CGObjCRuntime.h" 195f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor#include "Mangle.h" 202811ccf48d6d898c42cc4cfad37abedb36236d20Chandler Carruth#include "clang/CodeGen/CodeGenOptions.h" 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 22c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2321ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 241a5e0d7f18485e4fb958f96dcddff3e4486a4069Anders Carlsson#include "clang/AST/RecordLayout.h" 251b63e4f732dbc73d90abf886b4d21f8e3a165f6dChris Lattner#include "clang/Basic/Builtins.h" 262c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner#include "clang/Basic/Diagnostic.h" 278bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman#include "clang/Basic/SourceManager.h" 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 29e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff#include "clang/Basic/ConvertUTF.h" 30ec9426ca6039279bcc99bc2c625bb2abe4f0353dNate Begeman#include "llvm/CallingConv.h" 31bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner#include "llvm/Module.h" 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/Intrinsics.h" 3320ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 3478f7ece00e2ddfb64d4ed72a7be770b5b9b805e3Chris Lattner#include "llvm/Support/ErrorHandling.h" 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 392811ccf48d6d898c42cc4cfad37abedb36236d20Chandler CarruthCodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, 40fb97b03e42d397405f617be0252be83e77a66f6eChris Lattner llvm::Module &M, const llvm::TargetData &TD, 41bd3606426d389370616126af969904ec493cb105Chris Lattner Diagnostic &diags) 42bd3606426d389370616126af969904ec493cb105Chris Lattner : BlockModule(C, M, TD, Types, *this), Context(C), 432811ccf48d6d898c42cc4cfad37abedb36236d20Chandler Carruth Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), 44dbd920c7758e6dfb678a8f503fb14ba97c26f23aAnders Carlsson TheTargetData(TD), Diags(diags), Types(C, M, TD), MangleCtx(C), 45dbd920c7758e6dfb678a8f503fb14ba97c26f23aAnders Carlsson VtableInfo(*this), Runtime(0), 46a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson MemCpyFn(0), MemMoveFn(0), MemSetFn(0), CFConstantStringClassRef(0), 47a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext(M.getContext()) { 48208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar 493c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner if (!Features.ObjC1) 503c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = 0; 513c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (!Features.NeXTRuntime) 523c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateGNUObjCRuntime(*this); 533c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (Features.ObjCNonFragileABI) 543c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacNonFragileABIObjCRuntime(*this); 553c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else 563c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacObjCRuntime(*this); 57e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 58e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 5920f12a20ba9cfa6f8d53c8304e24f50903c45184Anders Carlsson DebugInfo = CodeGenOpts.DebugInfo ? new CGDebugInfo(*this) : 0; 602b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 612b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 622b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 63815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 64815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 65815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 66815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 67815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 6889ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson // We need to call this first because it can add deferred declarations. 6989ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson EmitCXXGlobalInitFunc(); 7089ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson 7182227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 72208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 73208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 74208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 756bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 766bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 77532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 780269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 79f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 80f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 81488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 822c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 8390df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 8490df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 8590df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 8690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 8856b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 892c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 900a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 910a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 922c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 9358c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 94488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 95c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 9690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 9790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 9890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 9990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 10156b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 102c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 1030a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 104c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 105c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 1061eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpLangOptions::VisibilityMode 10704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel DunbarCodeGenModule::getDeclVisibilityMode(const Decl *D) const { 10804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 10904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (VD->getStorageClass() == VarDecl::PrivateExtern) 11004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 11104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 11240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) { 11304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (attr->getVisibility()) { 11404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar default: assert(0 && "Unknown visibility!"); 1151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case VisibilityAttr::DefaultVisibility: 11604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Default; 11704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::HiddenVisibility: 11804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 11904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::ProtectedVisibility: 12004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Protected; 12104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar } 1227e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1236ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 12404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return getLangOptions().getVisibilityMode(); 1254f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman} 1264f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman 1271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 12804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar const Decl *D) const { 12904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 130df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 1317e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 1326ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 1337e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1346ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 13504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (getDeclVisibilityMode(D)) { 1367cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian default: assert(0 && "Unknown visibility!"); 13704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Default: 13804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 13904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Hidden: 14004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 14104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Protected: 14204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); 1437cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian } 1447cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 1457cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 1462a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlssonconst char *CodeGenModule::getMangledName(const GlobalDecl &GD) { 1474a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 1481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1492a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 1502a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledCXXCtorName(D, GD.getCtorType()); 1512a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 1522a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledCXXDtorName(D, GD.getDtorType()); 1531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1542a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledName(ND); 1552a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson} 1562a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 1575f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// \brief Retrieves the mangled name for the given declaration. 1585f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1595f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// If the given declaration requires a mangled name, returns an 160c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// const char* containing the mangled name. Otherwise, returns 161c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// the unmangled name. 1625f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1636ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregorconst char *CodeGenModule::getMangledName(const NamedDecl *ND) { 164f981bf84ad7745861bc9c971f46417527e1e5db5Daniel Dunbar if (!getMangleContext().shouldMangleDeclName(ND)) { 165c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); 1663c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return ND->getNameAsCString(); 167c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner } 1681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1696ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor llvm::SmallString<256> Name; 170f981bf84ad7745861bc9c971f46417527e1e5db5Daniel Dunbar getMangleContext().mangleName(ND, Name); 1716ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor Name += '\0'; 17295d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson return UniqueMangledName(Name.begin(), Name.end()); 17395d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson} 17495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson 17595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlssonconst char *CodeGenModule::UniqueMangledName(const char *NameStart, 17695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson const char *NameEnd) { 17795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson assert(*(NameEnd - 1) == '\0' && "Mangled name must be null terminated!"); 1781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson return MangledNames.GetOrCreateValue(NameStart, NameEnd).getKeyData(); 1805f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 1815f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 1826d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 1836d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 1846bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 18549988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 1866bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 1876d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 1886d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 1896bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 1906bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 1916bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 19249988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 1936bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 1946bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 1956bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 1966bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 1976bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 1986bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 1991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 2006bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<const llvm::Type*>(), 2016bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar false); 20296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 2036bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2046bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 2051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType* CtorStructTy = 2061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), 20796e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 2086bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2096bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 2106bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 2116bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 2126bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 2131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 2140032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 2153c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 21608e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 2176bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 2186bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2196bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 22096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 2211c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 222572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 2237db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 2241c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 2256d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 2266d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 2276d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 228532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 229532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 230532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 231532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 232532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 233532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 23496e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 235532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 236532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 2371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *gv = 2381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(TheModule, Array->getType(), false, 2391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::AppendingLinkage, Array, 2401c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.global.annotations"); 241532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 242532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 243532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 24486daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattnerstatic CodeGenModule::GVALinkage 2451eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpGetLinkageForFunction(ASTContext &Context, const FunctionDecl *FD, 24668584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor const LangOptions &Features) { 2479aeed32282fe8a775c24c01c923717ca86695685John McCall // Everything located semantically within an anonymous namespace is 2489aeed32282fe8a775c24c01c923717ca86695685John McCall // always internal. 2499aeed32282fe8a775c24c01c923717ca86695685John McCall if (FD->isInAnonymousNamespace()) 2509aeed32282fe8a775c24c01c923717ca86695685John McCall return CodeGenModule::GVA_Internal; 2519aeed32282fe8a775c24c01c923717ca86695685John McCall 2527d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // "static" functions get internal linkage. 2537d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor if (FD->getStorageClass() == FunctionDecl::Static && !isa<CXXMethodDecl>(FD)) 2547d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor return CodeGenModule::GVA_Internal; 2557d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor 2561fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor // The kind of external linkage this function will have, if it is not 2571fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor // inline or static. 2581fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor CodeGenModule::GVALinkage External = CodeGenModule::GVA_StrongExternal; 259548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson if (Context.getLangOptions().CPlusPlus) { 260548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson TemplateSpecializationKind TSK = FD->getTemplateSpecializationKind(); 261548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson 262548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson if (TSK == TSK_ExplicitInstantiationDefinition) { 263548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson // If a function has been explicitly instantiated, then it should 264548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson // always have strong external linkage. 265548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson return CodeGenModule::GVA_StrongExternal; 266548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson } 267548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson 268548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson if (TSK == TSK_ImplicitInstantiation) 269548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson External = CodeGenModule::GVA_TemplateInstantiation; 270548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson } 2711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2727ced9c8529b734e313f62a3b81189d6f402f6713Douglas Gregor if (!FD->isInlined()) 2731fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor return External; 2741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2751fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor if (!Features.CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 2761fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor // GNU or C99 inline semantics. Determine whether this symbol should be 2771fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor // externally visible. 2781fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor if (FD->isInlineDefinitionExternallyVisible()) 2791fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor return External; 280cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner 2811fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor // C99 inline semantics, where the symbol is not externally visible. 282b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor return CodeGenModule::GVA_C99Inline; 2831fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor } 284b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor 2857d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // C++0x [temp.explicit]p9: 2867d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // [ Note: The intent is that an inline function that is the subject of 2877d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // an explicit instantiation declaration will still be implicitly 2887d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // instantiated when used so that the body can be considered for 2897d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // inlining, but that no out-of-line copy of the inline function would be 2907d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // generated in the translation unit. -- end note ] 2917d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor if (FD->getTemplateSpecializationKind() 2927d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor == TSK_ExplicitInstantiationDeclaration) 2937d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor return CodeGenModule::GVA_C99Inline; 2947d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor 2951fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor return CodeGenModule::GVA_CXXInline; 2967c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 2977c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 2987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar/// SetFunctionDefinitionAttributes - Set attributes for a global. 299b97b69244a4e7916c7b8fca28fa21b36ce5b30b2Daniel Dunbar/// 300f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump/// FIXME: This is currently only done for aliases and functions, but not for 301f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump/// variables (these details are set in EmitGlobalVarDefinition for variables). 3027c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 3037c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 30468584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor GVALinkage Linkage = GetLinkageForFunction(getContext(), D, Features); 3057c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 30655d6f50b23a1fd0a04b568787a25beb7537e6c9bDaniel Dunbar if (Linkage == GVA_Internal) { 3079f9427999cf69b3b89cd0ed3be16ed27a1c282c7Chris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 30840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis } else if (D->hasAttr<DLLExportAttr>()) { 3097c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setLinkage(llvm::Function::DLLExportLinkage); 31040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis } else if (D->hasAttr<WeakAttr>()) { 31144b0bc008ee11cdee69ad12210ca7550e4fa426aChris Lattner GV->setLinkage(llvm::Function::WeakAnyLinkage); 312cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner } else if (Linkage == GVA_C99Inline) { 313cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 314cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // definition somewhere else, so we can use available_externally linkage. 315d9d049a93c55624908e81cf3927b7905efeba05fChris Lattner GV->setLinkage(llvm::Function::AvailableExternallyLinkage); 3161fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor } else if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) { 31786daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // In C++, the compiler has to emit a definition in every translation unit 31886daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // that references the function. We should use linkonce_odr because 31986daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // a) if all references in this translation unit are optimized away, we 32086daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 32186daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 32286daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // definition is dependable. 32386daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner GV->setLinkage(llvm::Function::LinkOnceODRLinkage); 3247c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 325cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner assert(Linkage == GVA_StrongExternal); 326cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // Otherwise, we have strong external linkage. 3277c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setLinkage(llvm::Function::ExternalLinkage); 3280dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar } 329d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 3307c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 331d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 332d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 3337dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 3341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 3357dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 336ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 337761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 338ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 339761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 340ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 341ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 342f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 343f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3447c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 3457c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 34674ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 3471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 348af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 34940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<AlwaysInlineAttr>()) 350af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 3511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3521feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 35381ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 354f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 355fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson if (Features.getStackProtectorMode() == LangOptions::SSPOn) 356fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 357fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson else if (Features.getStackProtectorMode() == LangOptions::SSPReq) 358fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 359fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 360bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) { 361bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt unsigned width = Context.Target.getCharWidth(); 362bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt F->setAlignment(AA->getAlignment() / width); 363bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt while ((AA = AA->getNext<AlignedAttr>())) 364bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt F->setAlignment(std::max(F->getAlignment(), AA->getAlignment() / width)); 365bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt } 366fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 367bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 368bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 369f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 370f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 3727c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 3737c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar setGlobalVisibility(GV, D); 3747c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 37540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 3767c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 3777c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 37840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 3797c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 3807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 3817c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3820e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 3830e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 3840e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 3850e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 3860e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 3877c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3887c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 3897c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3900e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 391f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 392f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 393f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbarvoid CodeGenModule::SetFunctionAttributes(const FunctionDecl *FD, 394c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 395c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 396c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 397c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(FD), F); 3981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3997c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 4007c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 4011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 40240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 4037c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 4041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 40540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<WeakImportAttr>()) { 4067c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 4071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 4087c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 4097c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 4101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 4117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 4127c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 41340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 4147c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 415219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 416219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 4170269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 4181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 4190269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 42035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 4210269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 4220269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4230269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 4240269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 425ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 4260269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 4270269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4283c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 4291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 43035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 43135f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 43235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 43335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 4341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 4351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 436a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 43735f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 4381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 439c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 440c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 44196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 4421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 4441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 4450269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 4467db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 4471c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 4480269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4490269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 4500269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 4510269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4520269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 45367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 45467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 45567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 45667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner while (!DeferredDeclsToEmit.empty()) { 4572a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 45867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 45967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 46067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // The mangled name for the decl must have been emitted in GlobalDeclMap. 46167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Look it up to see if it was defined with a stronger definition (e.g. an 46267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // extern inline function with a strong function redefinition). If so, 46367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // just ignore the deferred decl. 46467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner llvm::GlobalValue *CGRef = GlobalDeclMap[getMangledName(D)]; 46567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 4661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 46767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 46867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 4691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 47067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 47167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 47267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 4735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 4768bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 4771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 4781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// GlobalValue being annotated. The second field is the constant string 4791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// created from the AnnotateAttr's annotation. The third field is a constant 4808bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 4818bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 4828bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4838bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 4848bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 4858bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 4878bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 4888bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 4898bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 4908bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 4918bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 4928bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 4933c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); 4941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *anno = llvm::ConstantArray::get(VMContext, 4950032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson AA->getAnnotation(), true); 4960032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *unit = llvm::ConstantArray::get(VMContext, 4970032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson M->getModuleIdentifier(), 4988bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 4998bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 5008bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 5018bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 5021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *annoGV = 50395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, anno->getType(), false, 50495b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, anno, 50595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GV->getName()); 5068bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 5078bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 50895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, unit->getType(), false, 5091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::PrivateLinkage, unit, 51095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ".str"); 5118bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 51257d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 5138bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 5143c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, SBP), 5153c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(annoGV, SBP), 5163c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(unitGV, SBP), 5170032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) 5188bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 51947a434ff3d49e7906eda88e8e8242e4297725b32Owen Anderson return llvm::ConstantStruct::get(VMContext, Fields, 4, false); 5208bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 5218bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 52273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbarbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 5235c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // Never defer when EmitAllDecls is specified or the decl has 5245c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // attribute used. 52540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Features.EmitAllDecls || Global->hasAttr<UsedAttr>()) 52673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 527bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 528bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 52973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Constructors and destructors should never be deferred. 5301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (FD->hasAttr<ConstructorAttr>() || 53140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<DestructorAttr>()) 53273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 53373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 53461eab8872168af6eb1e0047a82901096cf145e27Eli Friedman // The key function for a class must never be deferred. 53561eab8872168af6eb1e0047a82901096cf145e27Eli Friedman if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Global)) { 53661eab8872168af6eb1e0047a82901096cf145e27Eli Friedman const CXXRecordDecl *RD = MD->getParent(); 53761eab8872168af6eb1e0047a82901096cf145e27Eli Friedman if (MD->isOutOfLine() && RD->isDynamicClass()) { 53861eab8872168af6eb1e0047a82901096cf145e27Eli Friedman const CXXMethodDecl *KeyFunction = getContext().getKeyFunction(RD); 53961eab8872168af6eb1e0047a82901096cf145e27Eli Friedman if (KeyFunction == MD->getCanonicalDecl()) 54061eab8872168af6eb1e0047a82901096cf145e27Eli Friedman return false; 54161eab8872168af6eb1e0047a82901096cf145e27Eli Friedman } 54261eab8872168af6eb1e0047a82901096cf145e27Eli Friedman } 54361eab8872168af6eb1e0047a82901096cf145e27Eli Friedman 54468584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor GVALinkage Linkage = GetLinkageForFunction(getContext(), FD, Features); 5451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 546dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner // static, static inline, always_inline, and extern inline functions can 54786daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // always be deferred. Normal inline functions can be deferred in C99/C++. 548cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 549cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner Linkage == GVA_CXXInline) 550dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return true; 551dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return false; 55273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar } 5531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 554dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner const VarDecl *VD = cast<VarDecl>(Global); 555dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner assert(VD->isFileVarDecl() && "Invalid decl"); 556b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor 55774d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson // We never want to defer structs that have non-trivial constructors or 55874d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson // destructors. 55974d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson 56074d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson // FIXME: Handle references. 56174d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 56274d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 56374d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson if (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor()) 56474d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson return false; 56574d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson } 56674d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson } 56774d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson 5681028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor // Static data may be deferred, but out-of-line static data members 5691028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor // cannot be. 570393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian if (VD->isInAnonymousNamespace()) 571393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return true; 572bd94ab9a19cb4bed55ecae9558533da9606bedcfEli Friedman if (VD->getLinkage() == VarDecl::InternalLinkage) { 573393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian // Initializer has side effects? 574393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian if (VD->getInit() && VD->getInit()->HasSideEffects(Context)) 575393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return false; 576393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return !(VD->isStaticDataMember() && VD->isOutOfLine()); 577393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian } 578393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return false; 57973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 58073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 581b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 5824a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 5831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 584bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 585bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 58640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 587bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner return EmitAliasDefinition(Global); 588219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 58967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 5905e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 59173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 59273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 59373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 5940269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 5950269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 596bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 597bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 5981b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson if (getLangOptions().CPlusPlus && !VD->getInit()) { 5991b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson // In C++, if this is marked "extern", defer code generation. 6001b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson if (VD->getStorageClass() == VarDecl::Extern || VD->isExternC()) 6011b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson return; 6021b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson 6031b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson // If this is a declaration of an explicit specialization of a static 6041b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson // data member in a class template, don't emit it. 6051b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson if (VD->isStaticDataMember() && 6061b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson VD->getTemplateSpecializationKind() == TSK_ExplicitSpecialization) 6071b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson return; 6081b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson } 609b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor 610b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor // In C, if this isn't a definition, defer code generation. 611b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor if (!getLangOptions().CPlusPlus && !VD->getInit()) 61273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 6134c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 6144c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 61567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 61667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 61773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (MayDeferGeneration(Global)) { 61867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // If the value has already been used, add it directly to the 61967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // DeferredDeclsToEmit list. 6202a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const char *MangledName = getMangledName(GD); 62167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (GlobalDeclMap.count(MangledName)) 6222a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDeclsToEmit.push_back(GD); 62367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner else { 62467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 62567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // first use of the mangled name will cause it to move into 62667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // DeferredDeclsToEmit. 6272a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDecls[MangledName] = GD; 62867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 629bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 630bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 631bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 632bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Otherwise emit the definition. 6332a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitGlobalDefinition(GD); 6344c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 6354c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 636b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 6374a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 6381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6398e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson PrettyStackTraceDecl CrashInfo((ValueDecl *)D, D->getLocation(), 6408e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 6418e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 6428e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 64372649ed78a25365d003b5218cae7b332c418800eEli Friedman if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { 6441a5e0d7f18485e4fb958f96dcddff3e4486a4069Anders Carlsson getVtableInfo().MaybeEmitVtable(GD); 64572649ed78a25365d003b5218cae7b332c418800eEli Friedman if (MD->isVirtual() && MD->isOutOfLine() && 64672649ed78a25365d003b5218cae7b332c418800eEli Friedman (!isa<CXXDestructorDecl>(D) || GD.getDtorType() != Dtor_Base)) { 647b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman if (isa<CXXDestructorDecl>(D)) { 648b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman GlobalDecl CanonGD(cast<CXXDestructorDecl>(D->getCanonicalDecl()), 649b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman GD.getDtorType()); 650b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman BuildThunksForVirtual(CanonGD); 651b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman } else { 652b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman BuildThunksForVirtual(MD->getCanonicalDecl()); 653b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman } 65472649ed78a25365d003b5218cae7b332c418800eEli Friedman } 65572649ed78a25365d003b5218cae7b332c418800eEli Friedman } 6561a5e0d7f18485e4fb958f96dcddff3e4486a4069Anders Carlsson 6572a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 6582a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitCXXConstructor(CD, GD.getCtorType()); 6597267c1693abe7875b0c57268be05005ae013c6c9Anders Carlsson else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 6607267c1693abe7875b0c57268be05005ae013c6c9Anders Carlsson EmitCXXDestructor(DD, GD.getDtorType()); 661b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner else if (isa<FunctionDecl>(D)) 662b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner EmitGlobalFunctionDefinition(GD); 6632a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 664bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalVarDefinition(VD); 6652a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson else { 666bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(0 && "Invalid argument to EmitGlobalDefinition()"); 667bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 668bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 669bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 67074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 67174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 67274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 67374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 67474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 67574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 67674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 67774391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetOrCreateLLVMFunction(const char *MangledName, 67874391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty, 679b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner GlobalDecl D) { 6800558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 6810558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 6820558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 6830558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 6840558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 6851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6860558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 68796e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 6883c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, PTy); 6890558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 6901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 691654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 692654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 693654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 694654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 695654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (!isa<llvm::FunctionType>(Ty)) { 696654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman Ty = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 697654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman std::vector<const llvm::Type*>(), false); 698654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 699654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 700654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function *F = llvm::Function::Create(cast<llvm::FunctionType>(Ty), 701654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 702654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman "", &getModule()); 703654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman F->setName(MangledName); 704654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 705654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman SetFunctionAttributes(cast<FunctionDecl>(D.getDecl()), F, 706654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction); 707654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman Entry = F; 708654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 70967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 71067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 71167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 7121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = 7139fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner DeferredDecls.find(MangledName); 71467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 71567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 71667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 71767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 71867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 719b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner } else if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl())) { 7200c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // If this the first reference to a C++ inline function in a class, queue up 7210c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // the deferred function body for emission. These are not seen as 7220c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // top-level declarations. 723b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner if (FD->isThisDeclarationADefinition() && MayDeferGeneration(FD)) 724b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner DeferredDeclsToEmit.push_back(D); 725c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian // A called constructor which has no definition or declaration need be 726c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian // synthesized. 727c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(FD)) { 72815233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman if (CD->isImplicit()) 72915233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman DeferredDeclsToEmit.push_back(D); 73015233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman } else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(FD)) { 73115233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman if (DD->isImplicit()) 73215233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman DeferredDeclsToEmit.push_back(D); 73315233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman } else if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 73415233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman if (MD->isCopyAssignment() && MD->isImplicit()) 735c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian DeferredDeclsToEmit.push_back(D); 736c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian } 73767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 7381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7390558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return F; 7400558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 7410558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 74274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 74374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 74474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 745b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 74674391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 74774391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 74874391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 7494a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 7504fe95f99a2693f1145785ea5835ba6937e49c730Douglas Gregor return GetOrCreateLLVMFunction(getMangledName(GD), Ty, GD); 75174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 75277ba708819285931932ecd33691a672bb59d221aEli Friedman 75374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 75474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 75574391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 75674391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 75774391b48b4791cded373683a3baf67314f358d50Chris Lattner const char *Name) { 75874391b48b4791cded373683a3baf67314f358d50Chris Lattner // Convert Name to be a uniqued string from the IdentifierInfo table. 759e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar Name = getContext().Idents.get(Name).getNameStart(); 760b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); 76174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 762bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 76320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedmanstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D) { 76420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman if (!D->getType().isConstant(Context)) 76520e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 76620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman if (Context.getLangOptions().CPlusPlus && 76720e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman Context.getBaseElementType(D->getType())->getAs<RecordType>()) { 76820e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman // FIXME: We should do something fancier here! 76920e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 77020e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 77120e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 77220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 77320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 77474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 77574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 77674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 77774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 77874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 77974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 78074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 78174391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetOrCreateLLVMGlobal(const char *MangledName, 78274391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::PointerType*Ty, 78374391b48b4791cded373683a3baf67314f358d50Chris Lattner const VarDecl *D) { 7843c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 7855d4f5c724533b994de05df49ae259120482ec366Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 78699b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 78774391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 788570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 7891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 79099b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 7913c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 79299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 7931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 79467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 79567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 79667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 7971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = 79867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.find(MangledName); 79967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 80067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 80167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 80267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 80367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 80467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 8051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 8071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 80899b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 8091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 0, "", 0, 81056ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 811d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner GV->setName(MangledName); 81249988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 81399b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 81474391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 815f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 816f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 81720e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman GV->setConstant(DeclIsConstantGlobal(Context, D)); 81849988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 81974391b48b4791cded373683a3baf67314f358d50Chris Lattner // FIXME: Merge with other attribute handling code. 82074391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D->getStorageClass() == VarDecl::PrivateExtern) 82104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 82249988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 8231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (D->hasAttr<WeakAttr>() || 82440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) 82574391b48b4791cded373683a3baf67314f358d50Chris Lattner GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 82656ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 82756ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 82874391b48b4791cded373683a3baf67314f358d50Chris Lattner } 8291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83074391b48b4791cded373683a3baf67314f358d50Chris Lattner return Entry = GV; 83174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 832eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 833eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 83474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 83574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 83674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 83774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 83874391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 83974391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 84074391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 84174391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 84274391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 84374391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 8441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::PointerType *PTy = 84696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 84774391b48b4791cded373683a3baf67314f358d50Chris Lattner return GetOrCreateLLVMGlobal(getMangledName(D), PTy, D); 84874391b48b4791cded373683a3baf67314f358d50Chris Lattner} 8493f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 85074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 85174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 85274391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 85374391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 85474391b48b4791cded373683a3baf67314f358d50Chris Lattner const char *Name) { 85574391b48b4791cded373683a3baf67314f358d50Chris Lattner // Convert Name to be a uniqued string from the IdentifierInfo table. 856e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar Name = getContext().Idents.get(Name).getNameStart(); 85796e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0); 858bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 859bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 86003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 86103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 86203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 8637520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 8647520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 8657520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 8667520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 8677520bd1de12af10ea08c662440565adbdf589317Douglas Gregor const char *MangledName = getMangledName(D); 8687520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (GlobalDeclMap.count(MangledName) == 0) { 869555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 87003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 8717520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 8727520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 8737520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 8747520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 87503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 87603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 87703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 8781028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregorstatic CodeGenModule::GVALinkage 8791028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas GregorGetLinkageForVariable(ASTContext &Context, const VarDecl *VD) { 8801028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor // Everything located semantically within an anonymous namespace is 8811028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor // always internal. 8821028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor if (VD->isInAnonymousNamespace()) 8831028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor return CodeGenModule::GVA_Internal; 8841028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor 8851028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor // Handle linkage for static data members. 8861028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor if (VD->isStaticDataMember()) { 8871028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor switch (VD->getTemplateSpecializationKind()) { 8881028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor case TSK_Undeclared: 8891028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor case TSK_ExplicitSpecialization: 8901028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor case TSK_ExplicitInstantiationDefinition: 8911028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor return CodeGenModule::GVA_StrongExternal; 8921028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor 8931028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 8949f0306d969700c9d79a31d559f95a1eb4c0bfcb4Douglas Gregor llvm::llvm_unreachable("Variable should not be instantiated"); 8951028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor // Fall through to treat this like any other instantiation. 8961028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor 8971028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor case TSK_ImplicitInstantiation: 8981028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor return CodeGenModule::GVA_TemplateInstantiation; 8991028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor } 9001028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor } 901bd94ab9a19cb4bed55ecae9558533da9606bedcfEli Friedman 902bd94ab9a19cb4bed55ecae9558533da9606bedcfEli Friedman if (VD->getLinkage() == VarDecl::InternalLinkage) 9031028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor return CodeGenModule::GVA_Internal; 9041028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor 9051028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor return CodeGenModule::GVA_StrongExternal; 9061028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor} 9071028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor 908bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 9098f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 91077ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 9111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9128f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner if (D->getInit() == 0) { 913cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 91403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 91503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 91603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 91703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 91803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 91903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 92003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 92103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 92203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 923b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 92477ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 925e9352cc9818ba59e7cf88500ef048991c90f3821Anders Carlsson Init = EmitConstantExpr(D->getInit(), D->getType()); 9261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9276e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 9286e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman QualType T = D->getInit()->getType(); 92989ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 93089ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson CXXGlobalInits.push_back(D); 93189ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 93289ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 93389ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 93489ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 93589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 9366e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 9378f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 9388e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 9392d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 940570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 9411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 942570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 943570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 9449d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 9459d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 9469d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 947570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 948570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 9491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 950570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 951570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 9521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 953570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 954570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 955570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 956570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 957570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 958570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 959570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 960570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 961570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 962570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 963570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 964570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { 9651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 966570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Remove the old entry from GlobalDeclMap so that we'll create a new one. 967570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GlobalDeclMap.erase(getMangledName(D)); 968232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 969570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 970570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 9710558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner GV->takeName(cast<llvm::GlobalValue>(Entry)); 9720558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 97377ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 9741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 9753c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 976570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 97777ba708819285931932ecd33691a672bb59d221aEli Friedman 97877ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 979570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 98077ba708819285931932ecd33691a672bb59d221aEli Friedman } 98177ba708819285931932ecd33691a672bb59d221aEli Friedman 98240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 9838bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 9848bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 985f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 9868bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 9878bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 98888a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 989e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 990e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 991e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 99220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman if (DeclIsConstantGlobal(Context, D)) 993e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 9941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9950de40af3a3aa14e3854c0eafeabd08f6762801f9Eli Friedman GV->setAlignment(getContext().getDeclAlignInBytes(D)); 99608d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman 99788a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 9981028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor GVALinkage Linkage = GetLinkageForVariable(getContext(), D); 999a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 10008fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 100140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1002ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLImportLinkage); 100340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1004ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLExportLinkage); 1005e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1006e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1007e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setLinkage(llvm::GlobalVariable::WeakODRLinkage); 1008e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1009e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 10101028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor } else if (Linkage == GVA_TemplateInstantiation) 10111028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 10121bc5c03a7f08b04f4ac26abd705418aaf4109062Daniel Dunbar else if (!getLangOptions().CPlusPlus && !CodeGenOpts.NoCommon && 1013309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 1014e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner !D->getAttr<SectionAttr>()) { 101504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::CommonLinkage); 1016e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // common vars aren't constant even if declared const. 1017e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 1018e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner } else 101904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); 10207e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar 10217c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 102204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 1023686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta // Emit global variable debug information. 10242d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner if (CGDebugInfo *DI = getDebugInfo()) { 102566031a5594bc9a7dc0dc5137c3e7955f835e4639Daniel Dunbar DI->setLocation(D->getLocation()); 1026686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta DI->EmitGlobalVariable(GV, D); 1027686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 102888a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 10295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1030bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1031bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1032bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1033bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1034bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1035bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1036bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1037bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1038bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1039bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1040bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1041bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1042bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1043bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 10441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1045bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 1046bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 1047bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1048bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1049bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner UI != E; ) { 1050bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 105108c93a7f2210b464e5abe298a5474b99414615f6Chris Lattner unsigned OpNo = UI.getOperandNo(); 1052bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*UI++); 105308c93a7f2210b464e5abe298a5474b99414615f6Chris Lattner if (!CI || OpNo != 0) continue; 10541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1055bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1056bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1057bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1058bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1059bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1060bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1061bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1062bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1063bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1064bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1065bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1066bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 1067bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getNumOperands()-1 == ArgNo || 1068bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->getOperand(ArgNo+1)->getType() != AI->getType()) { 1069bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1070bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1071bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1072bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1073bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1074bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 10751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1076bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1077bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 1078bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.append(CI->op_begin()+1, CI->op_begin()+1+ArgNo); 1079bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 1080bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 1081bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1082ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1083bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 1084bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 1085ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1086bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1087bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 108800549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 108900549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 10903b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1091aa40454a14837c573f323e29269cc0b53f495a13Devang Patel // Copy any custom metadata attached with CI. 1092aa40454a14837c573f323e29269cc0b53f495a13Devang Patel llvm::MetadataContext &TheMetadata = CI->getContext().getMetadata(); 1093aa40454a14837c573f323e29269cc0b53f495a13Devang Patel TheMetadata.copyMD(CI, NewCall); 1094aa40454a14837c573f323e29269cc0b53f495a13Devang Patel 1095bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1096bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1097bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1098bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1099bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1100b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 11012b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson const llvm::FunctionType *Ty; 1102b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 11031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11042b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { 1105183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall bool isVariadic = D->getType()->getAs<FunctionProtoType>()->isVariadic(); 11061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11072b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = getTypes().GetFunctionType(getTypes().getFunctionInfo(MD), isVariadic); 11082b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } else { 11092b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = cast<llvm::FunctionType>(getTypes().ConvertType(D->getType())); 11101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11112b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // As a special case, make sure that definitions of K&R function 11122b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // "type foo()" aren't declared as varargs (which forces the backend 11132b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // to do unnecessary work). 11142b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (D->getType()->isFunctionNoProtoType()) { 11152b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson assert(Ty->isVarArg() && "Didn't lower type as expected"); 11161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Due to stret, the lowered function could have arguments. 11171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Just create the same type as was lowered by ConvertType 11182b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // but strip off the varargs bit. 11192b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson std::vector<const llvm::Type*> Args(Ty->param_begin(), Ty->param_end()); 112096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::FunctionType::get(Ty->getReturnType(), Args, false); 11212b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } 1122ff75e1db95a53c7606e0bb114cf9adc59ab3d7f6Chris Lattner } 1123d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar 11249fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1125b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 11261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11270558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 11280558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 11290558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 11300558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 11310558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 11321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11340558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1135bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 11361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 113742745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1138bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 11390558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 114034809507232bc4c3c4840c7d092c7440219fddafChris Lattner 114162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 114262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 114362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 114462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 114562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 114662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 114762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f(int x)"). Start by making a new function of the 114862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // correct type, RAUW, then steal the name. 114934809507232bc4c3c4840c7d092c7440219fddafChris Lattner GlobalDeclMap.erase(getMangledName(D)); 1150b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 1151bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewFn->takeName(OldFn); 11521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1153bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1154bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1155bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 11569fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1157bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 11589fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 11599fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 11601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 116162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1162bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 11631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 11643c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1165bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1166bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 11671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 116862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1169bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 11701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11710558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1172bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 11731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11740558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 1175bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1176219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 11776379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 11787c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 11797c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 11801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 118140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1182219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 118340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1184219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1185bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1186bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1187bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattnervoid CodeGenModule::EmitAliasDefinition(const ValueDecl *D) { 118840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1189bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1190bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1191bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 11921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1193bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Unique the name through the identifier table. 1194bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const char *AliaseeName = AA->getAliasee().c_str(); 1195e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar AliaseeName = getContext().Idents.get(AliaseeName).getNameStart(); 1196bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1197bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1198bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1199bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1200bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 1201b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner Aliasee = GetOrCreateLLVMFunction(AliaseeName, DeclTy, GlobalDecl()); 1202bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1203bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Aliasee = GetOrCreateLLVMGlobal(AliaseeName, 120496e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1205bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1206bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 12071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1208bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1209bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1210bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 12111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1212bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // See if there is already something with the alias' name in the module. 1213bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const char *MangledName = getMangledName(D); 1214bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 12151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1216bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry && !Entry->isDeclaration()) { 1217bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a definition in the module, then it wins over the alias. 1218bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // This is dubious, but allow it to be safe. Just ignore the alias. 1219bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner GA->eraseFromParent(); 1220bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner return; 1221bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 12221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1223bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1224bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1225bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1226bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1227bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1228bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1229bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1230bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 12311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12323c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1233bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1234bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1235bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 12361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1237bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Now we know that there is no conflict, set the name. 1238bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry = GA; 1239bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner GA->setName(MangledName); 1240bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 12417c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 12427c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 12437c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 124440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 12457c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 12467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 12476fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (FD->getBody()) 12487c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 12497c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 12507c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 12517c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 12521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 125340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) { 12547c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 12557c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 12567c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 12577c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1258bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1259bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1260b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1261b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 126234771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbarllvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, 126334771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar unsigned BuiltinID) { 12643e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 12651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 12663e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 12671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12683e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 12693e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 12703e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 12713e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 12721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::FunctionType *Ty = 1274386ca78d0b03b1fb519e60d1a14cd12a220364a6Eli Friedman cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); 1275bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 1276b808c952bbff821dce727dd801a1098d64394f98Chris Lattner // Unique the name through the identifier table. 1277e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar Name = getContext().Idents.get(Name).getNameStart(); 127834771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD)); 1279bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1280bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 12817acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 12827acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 12837acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 12847acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 12857acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1286bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 12875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerllvm::Function *CodeGenModule::getMemCpyFn() { 12885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (MemCpyFn) return MemCpyFn; 12890032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); 12904e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemCpyFn = getIntrinsic(llvm::Intrinsic::memcpy, &IntPtr, 1); 12915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1292c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 12930c99509927a0c7a48490486b9fec287b63e5c09cEli Friedmanllvm::Function *CodeGenModule::getMemMoveFn() { 12940c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman if (MemMoveFn) return MemMoveFn; 12950032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); 12964e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemMoveFn = getIntrinsic(llvm::Intrinsic::memmove, &IntPtr, 1); 12970c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman} 12980c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman 129941ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venanciollvm::Function *CodeGenModule::getMemSetFn() { 130041ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio if (MemSetFn) return MemSetFn; 13010032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); 13024e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemSetFn = getIntrinsic(llvm::Intrinsic::memset, &IntPtr, 1); 130341ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio} 13047acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner 13051d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 13061d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 13071d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 130870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 13091d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 13101d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 1311df4eee9b035cc4b95b1ea72635e7429d06b0ecc8Daniel Dunbar unsigned NumBytes = Literal->getByteLength(); 13121d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1313f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1314f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1315f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 1316f015b034159d40e7033309e50036804eb1971787Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), 1317f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength)); 1318f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1319f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 13201d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 13211d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); 13221d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const UTF8 *FromPtr = (UTF8 *)Literal->getStrData(); 13231d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 13241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ConversionResult Result = ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 13261d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar &ToPtr, ToPtr + NumBytes, 13271d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar strictConversion); 13281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13291d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Check for conversion failure. 13301d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (Result != conversionOK) { 13311d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // FIXME: Have Sema::CheckObjCString() validate the UTF-8 string and remove 13321d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // this duplicate code. 13331d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar assert(Result == sourceIllegal && "UTF-8 to UTF-16 conversion failed"); 1334f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 1335f015b034159d40e7033309e50036804eb1971787Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), 1336f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength)); 1337e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff } 13381d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 133970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 13401d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 134170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 134270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 134370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 134470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 134570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 134670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 134770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 134870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 134970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 135070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 135170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 135270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 135370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 135470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 135570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 135670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 135770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1358434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1359434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1360434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 136170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 13621d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 136370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); 13641d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 13651d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 13661d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 13671d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 13681d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 13691d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 13701d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 13711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 137270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 137370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 13741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13751d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 13761d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 13771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13780032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 13790032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 13803e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 13811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13829d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1383c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1384c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 138596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 13861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 13879d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 13883e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 13893e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 13903c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1391c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 13921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1393e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 13943e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 13951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::StructType *STy = 1396e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1397e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 13985add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 139944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1400c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 14015add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 14021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1403c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 14043e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 14051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 14065add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 14075add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1408c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 14090032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1410a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 1411278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner const char *Sect = 0; 141295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1413278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner bool isConstant; 1414a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1415a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Sect = getContext().Target.getUnicodeStringSection(); 1416278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 141795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1418278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // Note: -fwritable-strings doesn't make unicode CFStrings writable, but 1419278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // does make plain ascii ones writable. 1420278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = true; 1421a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 142295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::PrivateLinkage; 1423278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = !Features.WritableStrings; 1424a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1425278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 14261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 1427278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 1428278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner ".str"); 1429a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (Sect) 14308e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 1431a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1432a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar unsigned Align = getContext().getTypeAlign(getContext().ShortTy)/8; 14331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV->setAlignment(Align); 1434a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 14355add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 14365add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1437c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1438c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 14395add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 14401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1441c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 144208e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 14431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 14441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 144595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 14468e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 14478e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 14481d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 14491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14500c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1451c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 145245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 14536143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 14541e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 14556143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 14561e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const char *StrData = E->getStrData(); 14571e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar unsigned Len = E->getByteLength(); 14581e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 14591e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 14601e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar getContext().getAsConstantArrayType(E->getType()); 14611e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 14621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1463dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 14641e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar std::string Str(StrData, StrData+Len); 14651e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 14661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1467dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 1468dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner RealLen *= getContext().Target.getWCharWidth()/8; 14691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14701e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 14711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14721e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 14731e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 14741e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 14756143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 14766143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 14776143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 14786143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 14796143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 14807eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 14817eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); 14827eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman if (S->isWide()) { 14837eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Type *DestTy = 14847eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); 14857eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman C = llvm::ConstantExpr::getBitCast(C, DestTy); 14867eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 14877eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman return C; 14886143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 14896143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1490eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1491eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1492eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1493eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1494eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1495eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1496a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1497a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1498eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1499eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1500eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1501a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 15021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 150345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 15045fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 15055fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 15066143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 15070032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 15080032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 15091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 151045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 15111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 151295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, 15131c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson C, GlobalName); 151445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 151545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 15166143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 15176143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 15186143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 15196143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 15206143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 15216143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 15226143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 15236143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 15245fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, 15255fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 15268e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 15278e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 15288e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 15298e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 153095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 15318e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 15328e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 15338e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 15345fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar return GenerateStringLiteral(str, false, *this, GlobalName); 15351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StringMapEntry<llvm::Constant *> &Entry = 153795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 153845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 153945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1540eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 154145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 154245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 15435fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); 154445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 154545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 154645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 15476143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 15486143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 15496143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 15506143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 15515fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, 15525fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 1553c9f29c61856ffb5f643cedbe87ac076f21a1381aChris Lattner return GetAddrOfConstantString(str + '\0', GlobalName); 15546143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 155541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1556af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1557af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 15581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 1559af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 15601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 156117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 1562af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 15631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1564af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1565af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1566af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1567af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1568af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1569af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1570af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1571af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1572af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 157317945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 1574fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1575fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1576af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 157717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 1578fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1579fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1580af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1581af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1582af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1583af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 158491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 1585984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 158617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 1587984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 1588984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 1589984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 1590984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 159191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 159291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 1593f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 1594f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 159591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 159691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 159791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 159891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 159917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 160091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 160191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 160291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 160391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 160441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 160541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 160641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 160741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 160841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 160941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 161041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 161141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 161216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 161316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 161416e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 16151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 161641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 1617293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 16182b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 161941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 162016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 162116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 162216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 16231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1624555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 1625555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 1626555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 162741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 1628555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 162941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 163041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 163195d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 163241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 1633984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 163441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 16359cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 16369d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 16379cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 1638dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 1639127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 1640127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 1641018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 16429cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 164395d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 16441fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 16451fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 16461fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 16471fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 164895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 164995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 165027ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 165127ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 165227ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 165336674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 165436674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 165536674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 165636674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 165736674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 165895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 16591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 166038e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 166141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 166241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 1663b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCCategory: 1664b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 166541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1666285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 166741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 1668b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 166941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 167041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 167141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 1672af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 1673af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 167441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 167541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 167641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1677af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 1678af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 1679af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 1680af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 168141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 16821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 168341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 168441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 168541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 16866fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 168741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 168841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 168941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 16901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 1691305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 169241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 169341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 169491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 169591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 169641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 169741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 169841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 169941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 17008d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer llvm::StringRef AsmString = AD->getAsmString()->getString(); 17011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 170241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 170341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 170441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 170541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 17068d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 170741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 170841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 17091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 1711f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 1712f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 1713f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 171441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 171541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 171641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 1717