CodeGenModule.cpp revision 82d0a418c8699fc6f4a9417457ffe93d43bba1c1
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" 2082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov#include "TargetInfo.h" 212811ccf48d6d898c42cc4cfad37abedb36236d20Chandler Carruth#include "clang/CodeGen/CodeGenOptions.h" 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 23c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2421ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 251a5e0d7f18485e4fb958f96dcddff3e4486a4069Anders Carlsson#include "clang/AST/RecordLayout.h" 261b63e4f732dbc73d90abf886b4d21f8e3a165f6dChris Lattner#include "clang/Basic/Builtins.h" 272c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner#include "clang/Basic/Diagnostic.h" 288bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman#include "clang/Basic/SourceManager.h" 295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 30e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff#include "clang/Basic/ConvertUTF.h" 31ec9426ca6039279bcc99bc2c625bb2abe4f0353dNate Begeman#include "llvm/CallingConv.h" 32bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner#include "llvm/Module.h" 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/Intrinsics.h" 34d5b8902c0329d80a216803b58dc3b689349a0c11Chris Lattner#include "llvm/LLVMContext.h" 3520ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 3678f7ece00e2ddfb64d4ed72a7be770b5b9b805e3Chris Lattner#include "llvm/Support/ErrorHandling.h" 375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 412811ccf48d6d898c42cc4cfad37abedb36236d20Chandler CarruthCodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, 42fb97b03e42d397405f617be0252be83e77a66f6eChris Lattner llvm::Module &M, const llvm::TargetData &TD, 43bd3606426d389370616126af969904ec493cb105Chris Lattner Diagnostic &diags) 44bd3606426d389370616126af969904ec493cb105Chris Lattner : BlockModule(C, M, TD, Types, *this), Context(C), 452811ccf48d6d898c42cc4cfad37abedb36236d20Chandler Carruth Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), 4682d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags), 4782d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov Types(C, M, TD, getTargetCodeGenInfo().getABIInfo()), 4882d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov MangleCtx(C), VtableInfo(*this), Runtime(0), 49a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson MemCpyFn(0), MemMoveFn(0), MemSetFn(0), CFConstantStringClassRef(0), 50a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext(M.getContext()) { 51208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar 523c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner if (!Features.ObjC1) 533c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = 0; 543c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (!Features.NeXTRuntime) 553c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateGNUObjCRuntime(*this); 563c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (Features.ObjCNonFragileABI) 573c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacNonFragileABIObjCRuntime(*this); 583c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else 593c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacObjCRuntime(*this); 60e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 61e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 6220f12a20ba9cfa6f8d53c8304e24f50903c45184Anders Carlsson DebugInfo = CodeGenOpts.DebugInfo ? new CGDebugInfo(*this) : 0; 632b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 642b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 652b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 66815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 67815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 68815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 69815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 70815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 7182227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 726c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalInitFunc(); 73208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 74208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 75208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 766bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 776bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 78532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 790269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 80f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 81f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 82488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 832c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 8490df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 8590df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 8690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 8790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 8956b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 902c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 910a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 920a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 932c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 9458c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 95488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 96c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 9790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 9890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 9990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 10090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 10256b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 103c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 1040a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 105c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 106c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 1071eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpLangOptions::VisibilityMode 10804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel DunbarCodeGenModule::getDeclVisibilityMode(const Decl *D) const { 10904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 11004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (VD->getStorageClass() == VarDecl::PrivateExtern) 11104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 11204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 11340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) { 11404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (attr->getVisibility()) { 11504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar default: assert(0 && "Unknown visibility!"); 1161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case VisibilityAttr::DefaultVisibility: 11704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Default; 11804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::HiddenVisibility: 11904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 12004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::ProtectedVisibility: 12104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Protected; 12204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar } 1237e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1246ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 12504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return getLangOptions().getVisibilityMode(); 1264f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman} 1274f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman 1281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 12904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar const Decl *D) const { 13004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 131df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 1327e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 1336ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 1347e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1356ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 13604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (getDeclVisibilityMode(D)) { 1377cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian default: assert(0 && "Unknown visibility!"); 13804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Default: 13904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 14004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Hidden: 14104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 14204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Protected: 14304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); 1447cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian } 1457cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 1467cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 1472a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlssonconst char *CodeGenModule::getMangledName(const GlobalDecl &GD) { 1484a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 1491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1502a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 1512a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledCXXCtorName(D, GD.getCtorType()); 1522a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 1532a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledCXXDtorName(D, GD.getDtorType()); 1541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1552a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledName(ND); 1562a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson} 1572a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 1585f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// \brief Retrieves the mangled name for the given declaration. 1595f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1605f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// If the given declaration requires a mangled name, returns an 161c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// const char* containing the mangled name. Otherwise, returns 162c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// the unmangled name. 1635f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1646ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregorconst char *CodeGenModule::getMangledName(const NamedDecl *ND) { 165f981bf84ad7745861bc9c971f46417527e1e5db5Daniel Dunbar if (!getMangleContext().shouldMangleDeclName(ND)) { 166c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); 1673c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return ND->getNameAsCString(); 168c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner } 1691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1706ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor llvm::SmallString<256> Name; 171f981bf84ad7745861bc9c971f46417527e1e5db5Daniel Dunbar getMangleContext().mangleName(ND, Name); 1726ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor Name += '\0'; 17395d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson return UniqueMangledName(Name.begin(), Name.end()); 17495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson} 17595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson 17695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlssonconst char *CodeGenModule::UniqueMangledName(const char *NameStart, 17795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson const char *NameEnd) { 17895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson assert(*(NameEnd - 1) == '\0' && "Mangled name must be null terminated!"); 1791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18095d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson return MangledNames.GetOrCreateValue(NameStart, NameEnd).getKeyData(); 1815f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 1825f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 1836d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 1846d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 1856bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 18649988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 1876bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 1886d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 1896d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 1906bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 1916bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 1926bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 19349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 1946bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 1956bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 1966bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 1976bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 1986bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 1996bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 2001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 2016bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<const llvm::Type*>(), 2026bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar false); 20396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 2046bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2056bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 2061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType* CtorStructTy = 2071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), 20896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 2096bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2106bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 2116bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 2126bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 2136bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 2141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 2150032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 2163c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 21708e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 2186bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 2196bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2206bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 22196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 2221c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 223572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 2247db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 2251c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 2266d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 2276d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 2286d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 229532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 230532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 231532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 232532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 233532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 234532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 23596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 236532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 237532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 2381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *gv = 2391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(TheModule, Array->getType(), false, 2401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::AppendingLinkage, Array, 2411c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.global.annotations"); 242532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 243532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 244532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 24586daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattnerstatic CodeGenModule::GVALinkage 2461eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpGetLinkageForFunction(ASTContext &Context, const FunctionDecl *FD, 24768584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor const LangOptions &Features) { 2489aeed32282fe8a775c24c01c923717ca86695685John McCall // Everything located semantically within an anonymous namespace is 2499aeed32282fe8a775c24c01c923717ca86695685John McCall // always internal. 2509aeed32282fe8a775c24c01c923717ca86695685John McCall if (FD->isInAnonymousNamespace()) 2519aeed32282fe8a775c24c01c923717ca86695685John McCall return CodeGenModule::GVA_Internal; 2529aeed32282fe8a775c24c01c923717ca86695685John McCall 2537d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // "static" functions get internal linkage. 2547d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor if (FD->getStorageClass() == FunctionDecl::Static && !isa<CXXMethodDecl>(FD)) 2557d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor return CodeGenModule::GVA_Internal; 2567d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor 2571fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor // The kind of external linkage this function will have, if it is not 2581fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor // inline or static. 2591fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor CodeGenModule::GVALinkage External = CodeGenModule::GVA_StrongExternal; 260548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson if (Context.getLangOptions().CPlusPlus) { 261548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson TemplateSpecializationKind TSK = FD->getTemplateSpecializationKind(); 262548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson 263548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson if (TSK == TSK_ExplicitInstantiationDefinition) { 264548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson // If a function has been explicitly instantiated, then it should 265548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson // always have strong external linkage. 266548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson return CodeGenModule::GVA_StrongExternal; 267548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson } 268548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson 269548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson if (TSK == TSK_ImplicitInstantiation) 270548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson External = CodeGenModule::GVA_TemplateInstantiation; 271548e60efea9a1d2c31679e11e9ff0d2f19b96694Anders Carlsson } 2721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2737ced9c8529b734e313f62a3b81189d6f402f6713Douglas Gregor if (!FD->isInlined()) 2741fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor return External; 2751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2761fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor if (!Features.CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 2771fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor // GNU or C99 inline semantics. Determine whether this symbol should be 2781fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor // externally visible. 2791fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor if (FD->isInlineDefinitionExternallyVisible()) 2801fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor return External; 281cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner 2821fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor // C99 inline semantics, where the symbol is not externally visible. 283b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor return CodeGenModule::GVA_C99Inline; 2841fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor } 285b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor 2867d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // C++0x [temp.explicit]p9: 2877d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // [ Note: The intent is that an inline function that is the subject of 2887d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // an explicit instantiation declaration will still be implicitly 2897d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // instantiated when used so that the body can be considered for 2907d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // inlining, but that no out-of-line copy of the inline function would be 2917d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor // generated in the translation unit. -- end note ] 2927d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor if (FD->getTemplateSpecializationKind() 2937d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor == TSK_ExplicitInstantiationDeclaration) 2947d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor return CodeGenModule::GVA_C99Inline; 2957d9c3c92c90ae36d58ec21bc53c4c08e02ac3555Douglas Gregor 2961fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor return CodeGenModule::GVA_CXXInline; 2977c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 2987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 2997c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar/// SetFunctionDefinitionAttributes - Set attributes for a global. 300b97b69244a4e7916c7b8fca28fa21b36ce5b30b2Daniel Dunbar/// 301f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump/// FIXME: This is currently only done for aliases and functions, but not for 302f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump/// variables (these details are set in EmitGlobalVarDefinition for variables). 3037c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 3047c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 30568584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor GVALinkage Linkage = GetLinkageForFunction(getContext(), D, Features); 3067c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 30755d6f50b23a1fd0a04b568787a25beb7537e6c9bDaniel Dunbar if (Linkage == GVA_Internal) { 3089f9427999cf69b3b89cd0ed3be16ed27a1c282c7Chris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 30940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis } else if (D->hasAttr<DLLExportAttr>()) { 3107c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setLinkage(llvm::Function::DLLExportLinkage); 31140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis } else if (D->hasAttr<WeakAttr>()) { 31244b0bc008ee11cdee69ad12210ca7550e4fa426aChris Lattner GV->setLinkage(llvm::Function::WeakAnyLinkage); 313cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner } else if (Linkage == GVA_C99Inline) { 314cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 315cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // definition somewhere else, so we can use available_externally linkage. 316d9d049a93c55624908e81cf3927b7905efeba05fChris Lattner GV->setLinkage(llvm::Function::AvailableExternallyLinkage); 3171fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor } else if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) { 31886daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // In C++, the compiler has to emit a definition in every translation unit 31986daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // that references the function. We should use linkonce_odr because 32086daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // a) if all references in this translation unit are optimized away, we 32186daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 32286daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 32386daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // definition is dependable. 32486daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner GV->setLinkage(llvm::Function::LinkOnceODRLinkage); 3257c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 326cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner assert(Linkage == GVA_StrongExternal); 327cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // Otherwise, we have strong external linkage. 3287c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setLinkage(llvm::Function::ExternalLinkage); 3290dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar } 330d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 3317c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 332d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 333d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 3347dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 3351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 3367dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 337ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 338761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 339ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 340761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 341ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 342ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 343f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 344f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3457c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 3467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 34774ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 3481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 349af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 35040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<AlwaysInlineAttr>()) 351af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 3521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3531feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 35481ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 355f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 356fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson if (Features.getStackProtectorMode() == LangOptions::SSPOn) 357fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 358fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson else if (Features.getStackProtectorMode() == LangOptions::SSPReq) 359fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 360fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 361bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) { 362bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt unsigned width = Context.Target.getCharWidth(); 363bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt F->setAlignment(AA->getAlignment() / width); 364bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt while ((AA = AA->getNext<AlignedAttr>())) 365bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt F->setAlignment(std::max(F->getAlignment(), AA->getAlignment() / width)); 366bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt } 367fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 368bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 369bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 370f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 371f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 3737c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 3747c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar setGlobalVisibility(GV, D); 3757c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 37640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 3777c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 3787c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 37940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 3807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 38182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 38282d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); 3837c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 3847c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3850e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 3860e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 3870e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 3880e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 3890e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 3907c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3917c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 3927c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3930e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 394f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 395f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 396f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbarvoid CodeGenModule::SetFunctionAttributes(const FunctionDecl *FD, 397c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 398c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 399c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 400c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(FD), F); 4011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4027c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 4037c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 4041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 40540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 4067c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 4071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 40840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<WeakImportAttr>()) { 4097c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 4101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 4117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 4127c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 4131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 4147c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 4157c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 41640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 4177c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 418219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 419219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 4200269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 4211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 4220269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 42335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 4240269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 4250269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4260269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 4270269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 428ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 4290269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 4300269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4313c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 4321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 43335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 43435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 43535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 43635f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 4371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 4381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 439a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 44035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 4411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 442c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 443c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 44496e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 4451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 4471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 4480269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 4497db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 4501c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 4510269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4520269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 4530269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 4540269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4550269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 45667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 45767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 45867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 45967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner while (!DeferredDeclsToEmit.empty()) { 4602a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 46167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 46267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 46367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // The mangled name for the decl must have been emitted in GlobalDeclMap. 46467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Look it up to see if it was defined with a stronger definition (e.g. an 46567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // extern inline function with a strong function redefinition). If so, 46667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // just ignore the deferred decl. 46767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner llvm::GlobalValue *CGRef = GlobalDeclMap[getMangledName(D)]; 46867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 4691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 47067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 47167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 4721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 47367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 47467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 47567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 4765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 4798bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 4801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 4811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// GlobalValue being annotated. The second field is the constant string 4821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// created from the AnnotateAttr's annotation. The third field is a constant 4838bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 4848bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 4858bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4868bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 4878bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 4888bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 4908bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 4918bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 4928bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 4938bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 4948bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 4958bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 4963c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); 4971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *anno = llvm::ConstantArray::get(VMContext, 4980032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson AA->getAnnotation(), true); 4990032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *unit = llvm::ConstantArray::get(VMContext, 5000032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson M->getModuleIdentifier(), 5018bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 5028bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 5038bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 5048bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 5051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *annoGV = 50695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, anno->getType(), false, 50795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, anno, 50895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GV->getName()); 5098bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 5108bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 51195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, unit->getType(), false, 5121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::PrivateLinkage, unit, 51395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ".str"); 5148bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 51557d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 5168bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 5173c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, SBP), 5183c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(annoGV, SBP), 5193c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(unitGV, SBP), 5200032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) 5218bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 52247a434ff3d49e7906eda88e8e8242e4297725b32Owen Anderson return llvm::ConstantStruct::get(VMContext, Fields, 4, false); 5238bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 5248bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 52573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbarbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 5265c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // Never defer when EmitAllDecls is specified or the decl has 5275c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // attribute used. 52840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Features.EmitAllDecls || Global->hasAttr<UsedAttr>()) 52973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 530bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 531bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 53273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Constructors and destructors should never be deferred. 5331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (FD->hasAttr<ConstructorAttr>() || 53440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<DestructorAttr>()) 53573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 53673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 53761eab8872168af6eb1e0047a82901096cf145e27Eli Friedman // The key function for a class must never be deferred. 53861eab8872168af6eb1e0047a82901096cf145e27Eli Friedman if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Global)) { 53961eab8872168af6eb1e0047a82901096cf145e27Eli Friedman const CXXRecordDecl *RD = MD->getParent(); 54061eab8872168af6eb1e0047a82901096cf145e27Eli Friedman if (MD->isOutOfLine() && RD->isDynamicClass()) { 54161eab8872168af6eb1e0047a82901096cf145e27Eli Friedman const CXXMethodDecl *KeyFunction = getContext().getKeyFunction(RD); 542bd6d6197fcfc98356ea60e816365eb0648b69556Douglas Gregor if (KeyFunction && 543bd6d6197fcfc98356ea60e816365eb0648b69556Douglas Gregor KeyFunction->getCanonicalDecl() == MD->getCanonicalDecl()) 54461eab8872168af6eb1e0047a82901096cf145e27Eli Friedman return false; 54561eab8872168af6eb1e0047a82901096cf145e27Eli Friedman } 54661eab8872168af6eb1e0047a82901096cf145e27Eli Friedman } 54761eab8872168af6eb1e0047a82901096cf145e27Eli Friedman 54868584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor GVALinkage Linkage = GetLinkageForFunction(getContext(), FD, Features); 5491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 550dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner // static, static inline, always_inline, and extern inline functions can 55186daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // always be deferred. Normal inline functions can be deferred in C99/C++. 552cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 553ab189950908fc08dd2533692f0e8253e807c73acEli Friedman Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 554dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return true; 555dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return false; 55673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar } 5571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 558dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner const VarDecl *VD = cast<VarDecl>(Global); 559dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner assert(VD->isFileVarDecl() && "Invalid decl"); 560b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor 56174d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson // We never want to defer structs that have non-trivial constructors or 56274d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson // destructors. 56374d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson 56474d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson // FIXME: Handle references. 56574d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 56674d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 56774d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson if (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor()) 56874d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson return false; 56974d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson } 57074d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson } 57174d644abe56809d9bcea7311f37aa9063ab9e064Anders Carlsson 5721028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor // Static data may be deferred, but out-of-line static data members 5731028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor // cannot be. 574393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian if (VD->isInAnonymousNamespace()) 575393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return true; 576bd94ab9a19cb4bed55ecae9558533da9606bedcfEli Friedman if (VD->getLinkage() == VarDecl::InternalLinkage) { 577393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian // Initializer has side effects? 578393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian if (VD->getInit() && VD->getInit()->HasSideEffects(Context)) 579393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return false; 580393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return !(VD->isStaticDataMember() && VD->isOutOfLine()); 581393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian } 582393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return false; 58373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 58473241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 585b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 5864a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 5871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 588bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 589bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 59040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 591bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner return EmitAliasDefinition(Global); 592219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 59367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 5945e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 59573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 59673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 59773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 5980269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 5990269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 600bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 601bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 6021b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson if (getLangOptions().CPlusPlus && !VD->getInit()) { 6031b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson // In C++, if this is marked "extern", defer code generation. 6041b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson if (VD->getStorageClass() == VarDecl::Extern || VD->isExternC()) 6051b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson return; 6061b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson 6071b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson // If this is a declaration of an explicit specialization of a static 6081b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson // data member in a class template, don't emit it. 6091b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson if (VD->isStaticDataMember() && 6101b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson VD->getTemplateSpecializationKind() == TSK_ExplicitSpecialization) 6111b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson return; 6121b3171dd6c7c319655f79de80ed8fed03f758e51Anders Carlsson } 613b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor 614b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor // In C, if this isn't a definition, defer code generation. 615b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor if (!getLangOptions().CPlusPlus && !VD->getInit()) 61673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 6174c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 6184c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 61967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 62067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 62173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (MayDeferGeneration(Global)) { 62267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // If the value has already been used, add it directly to the 62367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // DeferredDeclsToEmit list. 6242a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const char *MangledName = getMangledName(GD); 62567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (GlobalDeclMap.count(MangledName)) 6262a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDeclsToEmit.push_back(GD); 62767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner else { 62867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 62967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // first use of the mangled name will cause it to move into 63067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // DeferredDeclsToEmit. 6312a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDecls[MangledName] = GD; 63267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 633bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 634bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 635bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 636bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Otherwise emit the definition. 6372a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitGlobalDefinition(GD); 6384c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 6394c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 640b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 6414a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 6421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6438e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson PrettyStackTraceDecl CrashInfo((ValueDecl *)D, D->getLocation(), 6448e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 6458e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 6468e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 64772649ed78a25365d003b5218cae7b332c418800eEli Friedman if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { 6481a5e0d7f18485e4fb958f96dcddff3e4486a4069Anders Carlsson getVtableInfo().MaybeEmitVtable(GD); 64972649ed78a25365d003b5218cae7b332c418800eEli Friedman if (MD->isVirtual() && MD->isOutOfLine() && 65072649ed78a25365d003b5218cae7b332c418800eEli Friedman (!isa<CXXDestructorDecl>(D) || GD.getDtorType() != Dtor_Base)) { 651b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman if (isa<CXXDestructorDecl>(D)) { 652b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman GlobalDecl CanonGD(cast<CXXDestructorDecl>(D->getCanonicalDecl()), 653b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman GD.getDtorType()); 654b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman BuildThunksForVirtual(CanonGD); 655b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman } else { 656b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman BuildThunksForVirtual(MD->getCanonicalDecl()); 657b455f0e74be0144ab9738ef574d07bd661959525Eli Friedman } 65872649ed78a25365d003b5218cae7b332c418800eEli Friedman } 65972649ed78a25365d003b5218cae7b332c418800eEli Friedman } 6601a5e0d7f18485e4fb958f96dcddff3e4486a4069Anders Carlsson 6612a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 6622a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitCXXConstructor(CD, GD.getCtorType()); 6637267c1693abe7875b0c57268be05005ae013c6c9Anders Carlsson else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 6647267c1693abe7875b0c57268be05005ae013c6c9Anders Carlsson EmitCXXDestructor(DD, GD.getDtorType()); 665b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner else if (isa<FunctionDecl>(D)) 666b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner EmitGlobalFunctionDefinition(GD); 6672a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 668bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalVarDefinition(VD); 6692a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson else { 670bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(0 && "Invalid argument to EmitGlobalDefinition()"); 671bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 672bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 673bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 67474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 67574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 67674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 67774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 67874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 67974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 68074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 68174391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetOrCreateLLVMFunction(const char *MangledName, 68274391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty, 683b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner GlobalDecl D) { 6840558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 6850558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 6860558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 6870558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 6880558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 6891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6900558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 69196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 6923c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, PTy); 6930558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 6941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 695654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 696654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 697654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 698654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 699654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (!isa<llvm::FunctionType>(Ty)) { 700654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman Ty = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 701654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman std::vector<const llvm::Type*>(), false); 702654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 703654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 704654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function *F = llvm::Function::Create(cast<llvm::FunctionType>(Ty), 705654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 706654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman "", &getModule()); 707654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman F->setName(MangledName); 708654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 709654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman SetFunctionAttributes(cast<FunctionDecl>(D.getDecl()), F, 710654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction); 711654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman Entry = F; 712654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 71367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 71467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 71567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 7161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = 7179fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner DeferredDecls.find(MangledName); 71867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 71967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 72067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 72167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 72267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 723b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner } else if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl())) { 7240c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // If this the first reference to a C++ inline function in a class, queue up 7250c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // the deferred function body for emission. These are not seen as 7260c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // top-level declarations. 727b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner if (FD->isThisDeclarationADefinition() && MayDeferGeneration(FD)) 728b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner DeferredDeclsToEmit.push_back(D); 729c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian // A called constructor which has no definition or declaration need be 730c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian // synthesized. 731c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(FD)) { 73215233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman if (CD->isImplicit()) 73315233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman DeferredDeclsToEmit.push_back(D); 73415233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman } else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(FD)) { 73515233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman if (DD->isImplicit()) 73615233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman DeferredDeclsToEmit.push_back(D); 73715233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman } else if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 73815233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman if (MD->isCopyAssignment() && MD->isImplicit()) 739c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian DeferredDeclsToEmit.push_back(D); 740c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian } 74167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 7421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7430558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return F; 7440558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 7450558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 74674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 74774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 74874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 749b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 75074391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 75174391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 75274391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 7534a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 7544fe95f99a2693f1145785ea5835ba6937e49c730Douglas Gregor return GetOrCreateLLVMFunction(getMangledName(GD), Ty, GD); 75574391b48b4791cded373683a3baf67314f358d50Chris Lattner} 75677ba708819285931932ecd33691a672bb59d221aEli Friedman 75774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 75874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 75974391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 76074391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 76174391b48b4791cded373683a3baf67314f358d50Chris Lattner const char *Name) { 76274391b48b4791cded373683a3baf67314f358d50Chris Lattner // Convert Name to be a uniqued string from the IdentifierInfo table. 763e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar Name = getContext().Idents.get(Name).getNameStart(); 764b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); 76574391b48b4791cded373683a3baf67314f358d50Chris Lattner} 766bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 76720e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedmanstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D) { 76820e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman if (!D->getType().isConstant(Context)) 76920e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 77020e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman if (Context.getLangOptions().CPlusPlus && 77120e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman Context.getBaseElementType(D->getType())->getAs<RecordType>()) { 77220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman // FIXME: We should do something fancier here! 77320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 77420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 77520e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 77620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 77720e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 77874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 77974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 78074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 78174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 78274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 78374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 78474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 78574391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetOrCreateLLVMGlobal(const char *MangledName, 78674391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::PointerType*Ty, 78774391b48b4791cded373683a3baf67314f358d50Chris Lattner const VarDecl *D) { 7883c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 7895d4f5c724533b994de05df49ae259120482ec366Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 79099b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 79174391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 792570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 7931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 79499b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 7953c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 79699b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 7971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 79867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 79967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 80067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 8011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = 80267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.find(MangledName); 80367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 80467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 80567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 80667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 80767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 80867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 8091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 8111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 81299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 8131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 0, "", 0, 81456ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 815d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner GV->setName(MangledName); 81649988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 81799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 81874391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 819f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 820f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 82120e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman GV->setConstant(DeclIsConstantGlobal(Context, D)); 82249988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 82374391b48b4791cded373683a3baf67314f358d50Chris Lattner // FIXME: Merge with other attribute handling code. 82474391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D->getStorageClass() == VarDecl::PrivateExtern) 82504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 82649988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 8271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (D->hasAttr<WeakAttr>() || 82840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) 82974391b48b4791cded373683a3baf67314f358d50Chris Lattner GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 83056ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 83156ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 83274391b48b4791cded373683a3baf67314f358d50Chris Lattner } 8331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83474391b48b4791cded373683a3baf67314f358d50Chris Lattner return Entry = GV; 83574391b48b4791cded373683a3baf67314f358d50Chris Lattner} 836eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 837eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 83874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 83974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 84074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 84174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 84274391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 84374391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 84474391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 84574391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 84674391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 84774391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 8481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::PointerType *PTy = 85096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 85174391b48b4791cded373683a3baf67314f358d50Chris Lattner return GetOrCreateLLVMGlobal(getMangledName(D), PTy, D); 85274391b48b4791cded373683a3baf67314f358d50Chris Lattner} 8533f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 85474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 85574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 85674391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 85774391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 85874391b48b4791cded373683a3baf67314f358d50Chris Lattner const char *Name) { 85974391b48b4791cded373683a3baf67314f358d50Chris Lattner // Convert Name to be a uniqued string from the IdentifierInfo table. 860e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar Name = getContext().Idents.get(Name).getNameStart(); 86196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0); 862bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 863bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 86403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 86503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 86603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 8677520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 8687520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 8697520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 8707520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 8717520bd1de12af10ea08c662440565adbdf589317Douglas Gregor const char *MangledName = getMangledName(D); 8727520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (GlobalDeclMap.count(MangledName) == 0) { 873555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 87403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 8757520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 8767520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 8777520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 8787520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 87903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 88003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 88103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 8824b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregorllvm::GlobalVariable::LinkageTypes 8834b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas GregorCodeGenModule::getVtableLinkage(const CXXRecordDecl *RD) { 884dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (RD->isInAnonymousNamespace() || !RD->hasLinkage()) 885dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::InternalLinkage; 886dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 887dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (const CXXMethodDecl *KeyFunction 888dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor = RD->getASTContext().getKeyFunction(RD)) { 889dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // If this class has a key function, use that to determine the linkage of 890dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // the vtable. 8914b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor const FunctionDecl *Def = 0; 8924b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->getBody(Def)) 8934b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor KeyFunction = cast<CXXMethodDecl>(Def); 894dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 8954b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor switch (KeyFunction->getTemplateSpecializationKind()) { 8964b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_Undeclared: 8974b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitSpecialization: 8984b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->isInlined()) 8994b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 9004b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 9014b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::ExternalLinkage; 9024b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 9034b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ImplicitInstantiation: 9044b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDefinition: 9054b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 9064b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 9074b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 9084b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // FIXME: Use available_externally linkage. However, this currently 9094b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // breaks LLVM's build due to undefined symbols. 9104b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 9114b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 9124b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 913dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor } 914dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 915dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor switch (RD->getTemplateSpecializationKind()) { 916dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_Undeclared: 917dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitSpecialization: 918dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ImplicitInstantiation: 919dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitInstantiationDefinition: 920dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 921dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 922dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitInstantiationDeclaration: 923dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // FIXME: Use available_externally linkage. However, this currently 924dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // breaks LLVM's build due to undefined symbols. 925dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 9264b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 9274b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 9284b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 9294b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // Silence GCC warning. 9304b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 9314b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor} 9324b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 9331028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregorstatic CodeGenModule::GVALinkage 9341028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas GregorGetLinkageForVariable(ASTContext &Context, const VarDecl *VD) { 9351028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor // Everything located semantically within an anonymous namespace is 9361028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor // always internal. 9371028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor if (VD->isInAnonymousNamespace()) 9381028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor return CodeGenModule::GVA_Internal; 9391028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor 9401028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor // Handle linkage for static data members. 9411028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor if (VD->isStaticDataMember()) { 9421028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor switch (VD->getTemplateSpecializationKind()) { 9431028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor case TSK_Undeclared: 9441028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor case TSK_ExplicitSpecialization: 9451028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor case TSK_ExplicitInstantiationDefinition: 9461028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor return CodeGenModule::GVA_StrongExternal; 9471028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor 9481028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 9499f61aa9e280adea9fbf3365f0e4f6ed568c9885aJeffrey Yasskin llvm_unreachable("Variable should not be instantiated"); 9501028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor // Fall through to treat this like any other instantiation. 9511028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor 9521028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor case TSK_ImplicitInstantiation: 9531028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor return CodeGenModule::GVA_TemplateInstantiation; 9541028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor } 9551028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor } 956bd94ab9a19cb4bed55ecae9558533da9606bedcfEli Friedman 957bd94ab9a19cb4bed55ecae9558533da9606bedcfEli Friedman if (VD->getLinkage() == VarDecl::InternalLinkage) 9581028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor return CodeGenModule::GVA_Internal; 9591028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor 9601028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor return CodeGenModule::GVA_StrongExternal; 9611028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor} 9621028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor 963bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 9648f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 96577ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 9666c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman bool NonConstInit = false; 9671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9688f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner if (D->getInit() == 0) { 969cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 97003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 97103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 97203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 97303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 97403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 97503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 97603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 97703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 97803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 979b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 98077ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 981e9352cc9818ba59e7cf88500ef048991c90f3821Anders Carlsson Init = EmitConstantExpr(D->getInit(), D->getType()); 9821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9836e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 9846e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman QualType T = D->getInit()->getType(); 98589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 9866c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalVarDeclInitFunc(D); 98789ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 9886c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman NonConstInit = true; 98989ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 99089ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 99189ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 99289ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 9936e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 9948f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 9958e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 9962d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 997570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 9981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 999570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 1000570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 10019d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 10029d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 10039d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 1004570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 1005570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 10061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1007570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 1008570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 10091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1010570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 1011570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 1012570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 1013570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 1014570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 1015570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 1016570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 1017570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 1018570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 1019570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 1020570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 1021570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { 10221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1023570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Remove the old entry from GlobalDeclMap so that we'll create a new one. 1024570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GlobalDeclMap.erase(getMangledName(D)); 1025232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 1026570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 1027570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 10280558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner GV->takeName(cast<llvm::GlobalValue>(Entry)); 10290558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 103077ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 10311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 10323c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 1033570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 103477ba708819285931932ecd33691a672bb59d221aEli Friedman 103577ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 1036570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 103777ba708819285931932ecd33691a672bb59d221aEli Friedman } 103877ba708819285931932ecd33691a672bb59d221aEli Friedman 103940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 10408bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 10418bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 1042f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 10438bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 10448bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 104588a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 1046e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 1047e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 1048e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 10496c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman if (!NonConstInit && DeclIsConstantGlobal(Context, D)) 1050e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 10511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10520de40af3a3aa14e3854c0eafeabd08f6762801f9Eli Friedman GV->setAlignment(getContext().getDeclAlignInBytes(D)); 105308d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman 105488a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 10551028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor GVALinkage Linkage = GetLinkageForVariable(getContext(), D); 1056a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 10578fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 105840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1059ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLImportLinkage); 106040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1061ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLExportLinkage); 1062e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1063e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1064e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setLinkage(llvm::GlobalVariable::WeakODRLinkage); 1065e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1066e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 10671028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor } else if (Linkage == GVA_TemplateInstantiation) 10681028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 10691bc5c03a7f08b04f4ac26abd705418aaf4109062Daniel Dunbar else if (!getLangOptions().CPlusPlus && !CodeGenOpts.NoCommon && 1070309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 1071e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner !D->getAttr<SectionAttr>()) { 107204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::CommonLinkage); 1073e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // common vars aren't constant even if declared const. 1074e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 1075e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner } else 107604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); 10777e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar 10787c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 107904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 1080686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta // Emit global variable debug information. 10812d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner if (CGDebugInfo *DI = getDebugInfo()) { 108266031a5594bc9a7dc0dc5137c3e7955f835e4639Daniel Dunbar DI->setLocation(D->getLocation()); 1083686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta DI->EmitGlobalVariable(GV, D); 1084686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 108588a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 10865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1087bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1088bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1089bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1090bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1091bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1092bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1093bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1094bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1095bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1096bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1097bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1098bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1099bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1100bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 11011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1102bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 1103bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 1104bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1105bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1106bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner UI != E; ) { 1107bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 110808c93a7f2210b464e5abe298a5474b99414615f6Chris Lattner unsigned OpNo = UI.getOperandNo(); 1109bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*UI++); 111008c93a7f2210b464e5abe298a5474b99414615f6Chris Lattner if (!CI || OpNo != 0) continue; 11111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1112bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1113bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1114bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1115bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1116bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1117bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1118bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1119bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1120bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1121bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1122bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1123bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 1124bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getNumOperands()-1 == ArgNo || 1125bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->getOperand(ArgNo+1)->getType() != AI->getType()) { 1126bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1127bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1128bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1129bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1130bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1131bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 11321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1133bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1134bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 1135bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.append(CI->op_begin()+1, CI->op_begin()+1+ArgNo); 1136bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 1137bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 1138bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1139ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1140bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 1141bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 1142ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1143bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1144bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 114500549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 114600549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 11473b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1148aa40454a14837c573f323e29269cc0b53f495a13Devang Patel // Copy any custom metadata attached with CI. 11491280708c17d373762ea4110b4f989d6c7239f6fbChris Lattner if (llvm::MDNode *DbgNode = CI->getMetadata("dbg")) 11501280708c17d373762ea4110b4f989d6c7239f6fbChris Lattner NewCall->setMetadata("dbg", DbgNode); 1151bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1152bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1153bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1154bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1155bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1156b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 11572b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson const llvm::FunctionType *Ty; 1158b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 11591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11602b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { 1161183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall bool isVariadic = D->getType()->getAs<FunctionProtoType>()->isVariadic(); 11621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11632b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = getTypes().GetFunctionType(getTypes().getFunctionInfo(MD), isVariadic); 11642b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } else { 11652b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = cast<llvm::FunctionType>(getTypes().ConvertType(D->getType())); 11661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11672b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // As a special case, make sure that definitions of K&R function 11682b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // "type foo()" aren't declared as varargs (which forces the backend 11692b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // to do unnecessary work). 11702b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (D->getType()->isFunctionNoProtoType()) { 11712b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson assert(Ty->isVarArg() && "Didn't lower type as expected"); 11721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Due to stret, the lowered function could have arguments. 11731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Just create the same type as was lowered by ConvertType 11742b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // but strip off the varargs bit. 11752b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson std::vector<const llvm::Type*> Args(Ty->param_begin(), Ty->param_end()); 117696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::FunctionType::get(Ty->getReturnType(), Args, false); 11772b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } 1178ff75e1db95a53c7606e0bb114cf9adc59ab3d7f6Chris Lattner } 1179d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar 11809fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1181b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 11821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11830558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 11840558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 11850558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 11860558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 11870558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 11881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11900558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1191bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 11921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 119342745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1194bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 11950558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 119634809507232bc4c3c4840c7d092c7440219fddafChris Lattner 119762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 119862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 119962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 120062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 120162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 120262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 120362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f(int x)"). Start by making a new function of the 120462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // correct type, RAUW, then steal the name. 120534809507232bc4c3c4840c7d092c7440219fddafChris Lattner GlobalDeclMap.erase(getMangledName(D)); 1206b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 1207bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewFn->takeName(OldFn); 12081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1209bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1210bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1211bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 12129fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1213bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 12149fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 12159fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 12161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 121762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1218bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 12191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 12203c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1221bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1222bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 12231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 122462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1225bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 12261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12270558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1228bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 12291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12300558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 1231bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1232219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 12336379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 12347c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 12357c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 12361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 123740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1238219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 123940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1240219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1241bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1242bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1243bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattnervoid CodeGenModule::EmitAliasDefinition(const ValueDecl *D) { 124440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1245bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1246bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1247bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 12481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1249bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Unique the name through the identifier table. 1250bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const char *AliaseeName = AA->getAliasee().c_str(); 1251e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar AliaseeName = getContext().Idents.get(AliaseeName).getNameStart(); 1252bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1253bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1254bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1255bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1256bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 1257b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner Aliasee = GetOrCreateLLVMFunction(AliaseeName, DeclTy, GlobalDecl()); 1258bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1259bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Aliasee = GetOrCreateLLVMGlobal(AliaseeName, 126096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1261bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1262bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 12631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1264bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1265bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1266bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 12671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1268bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // See if there is already something with the alias' name in the module. 1269bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const char *MangledName = getMangledName(D); 1270bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 12711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1272bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry && !Entry->isDeclaration()) { 1273bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a definition in the module, then it wins over the alias. 1274bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // This is dubious, but allow it to be safe. Just ignore the alias. 1275bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner GA->eraseFromParent(); 1276bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner return; 1277bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 12781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1279bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1280bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1281bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1282bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1283bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1284bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1285bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1286bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 12871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12883c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1289bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1290bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1291bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 12921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1293bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Now we know that there is no conflict, set the name. 1294bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry = GA; 1295bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner GA->setName(MangledName); 1296bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 12977c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 12987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 12997c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 130040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 13017c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 13027c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 13036fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (FD->getBody()) 13047c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 13057c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 13067c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 13077c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 13081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 130940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) { 13107c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 13117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 13127c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 13137c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1314bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1315bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1316b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1317b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 131834771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbarllvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, 131934771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar unsigned BuiltinID) { 13203e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 13211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 13223e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 13231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13243e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 13253e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 13263e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 13273e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 13281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::FunctionType *Ty = 1330386ca78d0b03b1fb519e60d1a14cd12a220364a6Eli Friedman cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); 1331bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 1332b808c952bbff821dce727dd801a1098d64394f98Chris Lattner // Unique the name through the identifier table. 1333e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar Name = getContext().Idents.get(Name).getNameStart(); 133434771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD)); 1335bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1336bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 13377acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 13387acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 13397acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 13407acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 13417acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1342bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 13435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerllvm::Function *CodeGenModule::getMemCpyFn() { 13445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (MemCpyFn) return MemCpyFn; 13450032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); 13464e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemCpyFn = getIntrinsic(llvm::Intrinsic::memcpy, &IntPtr, 1); 13475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1348c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 13490c99509927a0c7a48490486b9fec287b63e5c09cEli Friedmanllvm::Function *CodeGenModule::getMemMoveFn() { 13500c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman if (MemMoveFn) return MemMoveFn; 13510032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); 13524e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemMoveFn = getIntrinsic(llvm::Intrinsic::memmove, &IntPtr, 1); 13530c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman} 13540c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman 135541ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venanciollvm::Function *CodeGenModule::getMemSetFn() { 135641ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio if (MemSetFn) return MemSetFn; 13570032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); 13584e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemSetFn = getIntrinsic(llvm::Intrinsic::memset, &IntPtr, 1); 135941ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio} 13607acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner 13611d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 13621d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 13631d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 136470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 13651d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 13661d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 1367df4eee9b035cc4b95b1ea72635e7429d06b0ecc8Daniel Dunbar unsigned NumBytes = Literal->getByteLength(); 13681d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1369f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1370f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1371f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 1372f015b034159d40e7033309e50036804eb1971787Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), 1373f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength)); 1374f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1375f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 13761d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 13771d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); 13781d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const UTF8 *FromPtr = (UTF8 *)Literal->getStrData(); 13791d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 13801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ConversionResult Result = ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 13821d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar &ToPtr, ToPtr + NumBytes, 13831d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar strictConversion); 13841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13851d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Check for conversion failure. 13861d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (Result != conversionOK) { 13871d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // FIXME: Have Sema::CheckObjCString() validate the UTF-8 string and remove 13881d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // this duplicate code. 13891d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar assert(Result == sourceIllegal && "UTF-8 to UTF-16 conversion failed"); 1390f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 1391f015b034159d40e7033309e50036804eb1971787Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), 1392f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength)); 1393e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff } 13941d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 139570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 13961d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 139770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 139870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 139970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 140070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 140170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 140270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 140370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 140470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 140570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 140670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 140770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 140870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 140970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 141070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 141170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 141270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 141370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1414434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1415434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1416434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 141770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 14181d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 141970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); 14201d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 14211d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 14221d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 14231d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 14241d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 14251d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 14261d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 14271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 142870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 142970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 14301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14311d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 14321d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 14331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14340032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 14350032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 14363e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 14371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14389d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1439c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1440c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 144196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 14421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 14439d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 14443e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 14453e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 14463c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1447c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 14481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1449e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 14503e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 14511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::StructType *STy = 1452e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1453e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 14545add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 145544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1456c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 14575add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 14581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1459c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 14603e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 14611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 14625add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 14635add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1464c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 14650032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1466a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 1467278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner const char *Sect = 0; 146895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1469278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner bool isConstant; 1470a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1471a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Sect = getContext().Target.getUnicodeStringSection(); 1472278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 147395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1474278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // Note: -fwritable-strings doesn't make unicode CFStrings writable, but 1475278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // does make plain ascii ones writable. 1476278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = true; 1477a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 147895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::PrivateLinkage; 1479278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = !Features.WritableStrings; 1480a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1481278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 14821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 1483278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 1484278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner ".str"); 1485a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (Sect) 14868e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 1487a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1488a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar unsigned Align = getContext().getTypeAlign(getContext().ShortTy)/8; 14891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV->setAlignment(Align); 1490a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 14915add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 14925add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1493c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1494c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 14955add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 14961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1497c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 149808e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 14991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 15001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 150195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 15028e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 15038e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 15041d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 15051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15060c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1507c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 150845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 15096143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 15101e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 15116143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 15121e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const char *StrData = E->getStrData(); 15131e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar unsigned Len = E->getByteLength(); 15141e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 15151e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 15161e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar getContext().getAsConstantArrayType(E->getType()); 15171e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 15181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1519dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 15201e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar std::string Str(StrData, StrData+Len); 15211e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 15221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1523dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 1524dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner RealLen *= getContext().Target.getWCharWidth()/8; 15251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15261e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 15271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15281e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 15291e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 15301e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 15316143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 15326143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 15336143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 15346143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 15356143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 15367eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 15377eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); 15387eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman if (S->isWide()) { 15397eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Type *DestTy = 15407eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); 15417eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman C = llvm::ConstantExpr::getBitCast(C, DestTy); 15427eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 15437eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman return C; 15446143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 15456143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1546eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1547eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1548eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1549eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1550eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1551eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1552a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1553a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1554eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1555eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1556eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1557a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 15581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 155945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 15605fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 15615fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 15626143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 15630032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 15640032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 15651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 156645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 15671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 156895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, 15691c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson C, GlobalName); 157045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 157145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 15726143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 15736143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 15746143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 15756143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 15766143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 15776143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 15786143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 15796143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 15805fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, 15815fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 15828e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 15838e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 15848e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 15858e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 158695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 15878e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 15888e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 15898e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 15905fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar return GenerateStringLiteral(str, false, *this, GlobalName); 15911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StringMapEntry<llvm::Constant *> &Entry = 159395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 159445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 159545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1596eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 159745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 159845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 15995fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); 160045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 160145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 160245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 16036143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 16046143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 16056143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 16066143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 16075fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, 16085fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 1609c9f29c61856ffb5f643cedbe87ac076f21a1381aChris Lattner return GetAddrOfConstantString(str + '\0', GlobalName); 16106143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 161141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1612af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1613af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 16141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 1615af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 16161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 161717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 1618af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 16191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1620af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1621af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1622af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1623af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1624af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1625af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1626af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1627af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1628af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 162917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 1630fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1631fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1632af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 163317945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 1634fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1635fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1636af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1637af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1638af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1639af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 164091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 1641984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 164217945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 1643984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 1644984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 1645984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 1646984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 164791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 164891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 1649f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 1650f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 165191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 165291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 165391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 165491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 165517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 165691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 165791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 165891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 165991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 166041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 166141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 166241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 166341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 166441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 166541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 166641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 166741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 166816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 166916e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 167016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 16711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 167241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 1673293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 16742b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 167541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 167616e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 167716e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 167816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 16791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1680555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 1681555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 1682555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 168341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 1684555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 168541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 168641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 168795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 168841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 1689984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 169041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 16919cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 16929d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 16939cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 1694dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 1695127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 1696127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 1697018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 16989cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 169995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 17001fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 17011fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 17021fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 17031fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 170495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 170595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 170627ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 170727ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 170827ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 170936674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 171036674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 171136674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 171236674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 171336674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 171495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 17151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 171638e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 171741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 171841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 1719b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCCategory: 1720b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 172141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1722285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 172341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 1724b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 172541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 172641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 172741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 1728af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 1729af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 173041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 173141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 173241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1733af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 1734af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 1735af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 1736af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 173741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 17381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 173941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 174041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 174141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 17426fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 174341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 174441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 174541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 17461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 1747305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 174841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 174941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 175091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 175191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 175241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 175341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 175441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 175541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 17568d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer llvm::StringRef AsmString = AD->getAsmString()->getString(); 17571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 175841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 175941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 176041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 176141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 17628d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 176341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 176441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 17651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 1767f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 1768f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 1769f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 177041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 177141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 177241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 1773