CodeGenModule.cpp revision 1d5529132e4620562cab931c1f84c24e42f02741
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" 20bd3606426d389370616126af969904ec493cb105Chris Lattner#include "clang/Frontend/CompileOptions.h" 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 22c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2321ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 241b63e4f732dbc73d90abf886b4d21f8e3a165f6dChris Lattner#include "clang/Basic/Builtins.h" 252c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner#include "clang/Basic/Diagnostic.h" 268bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman#include "clang/Basic/SourceManager.h" 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 28e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff#include "clang/Basic/ConvertUTF.h" 29ec9426ca6039279bcc99bc2c625bb2abe4f0353dNate Begeman#include "llvm/CallingConv.h" 30bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner#include "llvm/Module.h" 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/Intrinsics.h" 3220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 37bd3606426d389370616126af969904ec493cb105Chris LattnerCodeGenModule::CodeGenModule(ASTContext &C, const CompileOptions &compileOpts, 38fb97b03e42d397405f617be0252be83e77a66f6eChris Lattner llvm::Module &M, const llvm::TargetData &TD, 39bd3606426d389370616126af969904ec493cb105Chris Lattner Diagnostic &diags) 40bd3606426d389370616126af969904ec493cb105Chris Lattner : BlockModule(C, M, TD, Types, *this), Context(C), 41bd3606426d389370616126af969904ec493cb105Chris Lattner Features(C.getLangOptions()), CompileOpts(compileOpts), TheModule(M), 422a998148a6823c44d67da347c95eb2ea21f6b986Mike Stump TheTargetData(TD), Diags(diags), Types(C, M, TD), Runtime(0), 43a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson MemCpyFn(0), MemMoveFn(0), MemSetFn(0), CFConstantStringClassRef(0), 44a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext(M.getContext()) { 45208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar 463c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner if (!Features.ObjC1) 473c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = 0; 483c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (!Features.NeXTRuntime) 493c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateGNUObjCRuntime(*this); 503c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (Features.ObjCNonFragileABI) 513c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacNonFragileABIObjCRuntime(*this); 523c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else 533c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacObjCRuntime(*this); 54e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 55e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 566dba432c7b862c2219e5d6e52b0cd188fbf84b01Devang Patel DebugInfo = CompileOpts.DebugInfo ? new CGDebugInfo(this) : 0; 572b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 582b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 592b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 60815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 61815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 62815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 63815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 64815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 6582227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 66208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 67208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 68208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 696bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 706bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 71532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 720269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 73f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 74f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 75488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 762c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 7790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 7890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 7990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 8090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 81488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 8256b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 832c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 840a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 850a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 862c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 8758c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 88488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 89c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 9090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 9190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 9290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 9390df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 94488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 9556b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 96c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 970a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 98c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 99c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 10004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel DunbarLangOptions::VisibilityMode 10104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel DunbarCodeGenModule::getDeclVisibilityMode(const Decl *D) const { 10204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 10304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (VD->getStorageClass() == VarDecl::PrivateExtern) 10404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 10504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 10640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) { 10704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (attr->getVisibility()) { 10804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar default: assert(0 && "Unknown visibility!"); 10904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::DefaultVisibility: 11004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Default; 11104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::HiddenVisibility: 11204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 11304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::ProtectedVisibility: 11404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Protected; 11504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar } 1167e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1176ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 11804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return getLangOptions().getVisibilityMode(); 1194f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman} 1204f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman 12104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbarvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 12204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar const Decl *D) const { 12304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 124df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 1257e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 1266ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 1277e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1286ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 12904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (getDeclVisibilityMode(D)) { 1307cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian default: assert(0 && "Unknown visibility!"); 13104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Default: 13204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 13304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Hidden: 13404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 13504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Protected: 13604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); 1377cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian } 1387cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 1397cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 1402a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlssonconst char *CodeGenModule::getMangledName(const GlobalDecl &GD) { 1412a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const NamedDecl *ND = GD.getDecl(); 1422a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 1432a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 1442a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledCXXCtorName(D, GD.getCtorType()); 1452a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 1462a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledCXXDtorName(D, GD.getDtorType()); 1472a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 1482a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledName(ND); 1492a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson} 1502a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 1515f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// \brief Retrieves the mangled name for the given declaration. 1525f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1535f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// If the given declaration requires a mangled name, returns an 154c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// const char* containing the mangled name. Otherwise, returns 155c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// the unmangled name. 1565f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1576ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregorconst char *CodeGenModule::getMangledName(const NamedDecl *ND) { 158c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner // In C, functions with no attributes never need to be mangled. Fastpath them. 159c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner if (!getLangOptions().CPlusPlus && !ND->hasAttrs()) { 160c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); 1613c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return ND->getNameAsCString(); 162c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner } 163c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner 1646ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor llvm::SmallString<256> Name; 1656ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor llvm::raw_svector_ostream Out(Name); 166fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar if (!mangleName(ND, Context, Out)) { 167fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); 1683c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return ND->getNameAsCString(); 169fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar } 1705f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 1716ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor Name += '\0'; 17295d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson return UniqueMangledName(Name.begin(), Name.end()); 17395d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson} 17495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson 17595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlssonconst char *CodeGenModule::UniqueMangledName(const char *NameStart, 17695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson const char *NameEnd) { 17795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson assert(*(NameEnd - 1) == '\0' && "Mangled name must be null terminated!"); 17895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson 17995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson return MangledNames.GetOrCreateValue(NameStart, NameEnd).getKeyData(); 1805f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 1815f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 1826d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 1836d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 1846bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 18549988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 1866bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 1876d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 1886d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 1896bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 1906bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 1916bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 19249988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 1936bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 1946bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 1956bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 1966bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 1976bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 1986bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 199a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getFunctionType(llvm::Type::VoidTy, 2006bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<const llvm::Type*>(), 2016bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar false); 202a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson llvm::Type *CtorPFTy = VMContext.getPointerTypeUnqual(CtorFTy); 2036bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2046bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 205572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::StructType* CtorStructTy = 206a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getStructType(llvm::Type::Int32Ty, 207a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getPointerTypeUnqual(CtorFTy), NULL); 2086bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2096bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 2106bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 2116bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 2126bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 213a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson S.push_back( 214a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantInt(llvm::Type::Int32Ty, I->second, false)); 215a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson S.push_back(VMContext.getConstantExprBitCast(I->first, CtorPFTy)); 216a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson Ctors.push_back(VMContext.getConstantStruct(CtorStructTy, S)); 2176bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 2186bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2196bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 220a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson llvm::ArrayType *AT = VMContext.getArrayType(CtorStructTy, Ctors.size()); 2211c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 222572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 223a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantArray(AT, Ctors), 2241c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 2256d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 2266d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 2276d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 228532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 229532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 230532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 231532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 232532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 233532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 234a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantArray(VMContext.getArrayType(Annotations[0]->getType(), 235532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 236532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 237532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::GlobalValue *gv = 2381c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, Array->getType(), false, 239532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::GlobalValue::AppendingLinkage, Array, 2401c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.global.annotations"); 241532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 242532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 243532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 24486daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattnerstatic CodeGenModule::GVALinkage 24568584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas GregorGetLinkageForFunction(ASTContext &Context, const FunctionDecl *FD, 24668584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor const LangOptions &Features) { 2471fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor // The kind of external linkage this function will have, if it is not 2481fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor // inline or static. 2491fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor CodeGenModule::GVALinkage External = CodeGenModule::GVA_StrongExternal; 2501fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor if (Context.getLangOptions().CPlusPlus && 2511fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor (FD->getPrimaryTemplate() || FD->getInstantiatedFromMemberFunction()) && 2521fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor !FD->isExplicitSpecialization()) 2531fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor External = CodeGenModule::GVA_TemplateInstantiation; 2541fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor 255167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 256167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson // C++ member functions defined inside the class are always inline. 257f5cecfbdcd20be224861f9e67c5973a9a2b61512Argyrios Kyrtzidis if (MD->isInline() || !MD->isOutOfLine()) 258167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson return CodeGenModule::GVA_CXXInline; 259167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson 2601fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor return External; 261167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson } 262167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson 26343907e87c776391d7d96da04b48e7bf06d8baafcEli Friedman // "static" functions get internal linkage. 2645e222139610a9f8b2b5f4ddd112f10dec9ec1e97Eli Friedman if (FD->getStorageClass() == FunctionDecl::Static) 2657c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar return CodeGenModule::GVA_Internal; 2667c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 267005eedce54da6580de37bb115bf581008637e4b1Chris Lattner if (!FD->isInline()) 2681fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor return External; 26986daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner 270d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner // If the inline function explicitly has the GNU inline attribute on it, or if 271d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner // this is C89 mode, we use to GNU semantics. 2729f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor if (!Features.C99 && !Features.CPlusPlus) { 273d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner // extern inline in GNU mode is like C99 inline. 2749f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor if (FD->getStorageClass() == FunctionDecl::Extern) 2759f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor return CodeGenModule::GVA_C99Inline; 2769f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor // Normal inline is a strong symbol. 2779f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor return CodeGenModule::GVA_StrongExternal; 27868584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor } else if (FD->hasActiveGNUInlineAttribute(Context)) { 2799f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor // GCC in C99 mode seems to use a different decision-making 2809f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor // process for extern inline, which factors in previous 2819f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor // declarations. 28268584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (FD->isExternGNUInline(Context)) 283d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner return CodeGenModule::GVA_C99Inline; 284d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner // Normal inline is a strong symbol. 2851fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor return External; 286d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner } 287cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner 28886daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // The definition of inline changes based on the language. Note that we 28986daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // have already handled "static inline" above, with the GVA_Internal case. 290cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner if (Features.CPlusPlus) // inline and extern inline. 29186daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner return CodeGenModule::GVA_CXXInline; 29286daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner 293d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner assert(Features.C99 && "Must be in C99 mode if not in C89 or C++ mode"); 294b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor if (FD->isC99InlineDefinition()) 295b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor return CodeGenModule::GVA_C99Inline; 296b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor 297b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor return CodeGenModule::GVA_StrongExternal; 2987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 2997c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3007c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar/// SetFunctionDefinitionAttributes - Set attributes for a global. 301b97b69244a4e7916c7b8fca28fa21b36ce5b30b2Daniel Dunbar/// 302f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump/// FIXME: This is currently only done for aliases and functions, but not for 303f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump/// variables (these details are set in EmitGlobalVarDefinition for variables). 3047c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 3057c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 30668584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor GVALinkage Linkage = GetLinkageForFunction(getContext(), D, Features); 3077c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 30855d6f50b23a1fd0a04b568787a25beb7537e6c9bDaniel Dunbar if (Linkage == GVA_Internal) { 3099f9427999cf69b3b89cd0ed3be16ed27a1c282c7Chris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 31040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis } else if (D->hasAttr<DLLExportAttr>()) { 3117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setLinkage(llvm::Function::DLLExportLinkage); 31240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis } else if (D->hasAttr<WeakAttr>()) { 31344b0bc008ee11cdee69ad12210ca7550e4fa426aChris Lattner GV->setLinkage(llvm::Function::WeakAnyLinkage); 314cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner } else if (Linkage == GVA_C99Inline) { 315cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 316cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // definition somewhere else, so we can use available_externally linkage. 317d9d049a93c55624908e81cf3927b7905efeba05fChris Lattner GV->setLinkage(llvm::Function::AvailableExternallyLinkage); 3181fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor } else if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) { 31986daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // In C++, the compiler has to emit a definition in every translation unit 32086daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // that references the function. We should use linkonce_odr because 32186daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // a) if all references in this translation unit are optimized away, we 32286daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 32386daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 32486daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // definition is dependable. 32586daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner GV->setLinkage(llvm::Function::LinkOnceODRLinkage); 3267c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 327cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner assert(Linkage == GVA_StrongExternal); 328cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // Otherwise, we have strong external linkage. 3297c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setLinkage(llvm::Function::ExternalLinkage); 3300dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar } 331d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 3327c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 333d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 334d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 3357dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 3367dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar const CGFunctionInfo &Info, 3377dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 338761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 33988b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbar ConstructAttributeList(Info, D, AttributeList); 340c134fcb0d7989fe6937e47e6216637647e074aefEli Friedman 341761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 342761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeList.size())); 343ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman 344ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman // Set the appropriate calling convention for the Function. 34540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<FastCallAttr>()) 346f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov F->setCallingConv(llvm::CallingConv::X86_FastCall); 347f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov 34840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<StdCallAttr>()) 349f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov F->setCallingConv(llvm::CallingConv::X86_StdCall); 350f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 351f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3527c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 3537c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 35474ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 355f93349f3ec4d69eafba42436c33aaa91bfca7e70Daniel Dunbar F->addFnAttr(llvm::Attribute::NoUnwind); 356af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 35740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<AlwaysInlineAttr>()) 358af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 35981ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson 36040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<NoinlineAttr>()) 36181ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 362f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 363f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3647c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetCommonAttributes(const Decl *D, 3657c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 3667c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar setGlobalVisibility(GV, D); 3677c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 36840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 3697c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 3707c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 37140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 3727c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 3737c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 3747c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3750e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 3760e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 3770e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 3780e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 3790e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 3807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3817c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 3827c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3830e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 384f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 385f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 386f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbarvoid CodeGenModule::SetFunctionAttributes(const FunctionDecl *FD, 387c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 388c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 389c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 390c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(FD), F); 39145c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 3927c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 3937c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 3947c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 39540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 3967c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 39740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis } else if (FD->hasAttr<WeakAttr>() || 39840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<WeakImportAttr>()) { 3997c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 4007c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // separate linkage types for this. 4017c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 4027c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 4037c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalLinkage); 4047c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 4057c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 40640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 4077c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 408219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 409219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 4100269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 4110269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar assert(!GV->isDeclaration() && 4120269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 41335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 4140269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 4150269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4160269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 4170269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 418ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 4190269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 4200269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 421a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson llvm::Type *i8PTy = VMContext.getPointerTypeUnqual(llvm::Type::Int8Ty); 42235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner 42335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 42435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 42535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 42635f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 42735f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray[i] = 428a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantExprBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 429a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 43035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 43135f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner 432c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 433c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 434a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson llvm::ArrayType *ATy = VMContext.getArrayType(i8PTy, UsedArray.size()); 435c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian 4360269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalVariable *GV = 4371c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(getModule(), ATy, false, 4380269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 439a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantArray(ATy, UsedArray), 4401c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 4410269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4420269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 4430269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 4440269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4450269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 44667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 44767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 44867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 44967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner while (!DeferredDeclsToEmit.empty()) { 4502a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 45167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 45267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 45367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // The mangled name for the decl must have been emitted in GlobalDeclMap. 45467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Look it up to see if it was defined with a stronger definition (e.g. an 45567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // extern inline function with a strong function redefinition). If so, 45667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // just ignore the deferred decl. 45767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner llvm::GlobalValue *CGRef = GlobalDeclMap[getMangledName(D)]; 45867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 459b723f7520bcce5f13ccaae557c16a1e7133b6908Anders Carlsson 46067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 46167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 46267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 46367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 46467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 46567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4688bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 4698bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 4708bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 4713c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar/// GlobalValue being annotated. The second field is the constant string 4728bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// created from the AnnotateAttr's annotation. The third field is a constant 4738bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 4748bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 4758bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4768bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 4778bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 4788bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4798bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begemanllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 4808bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 4818bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 4828bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 4838bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 4848bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 4858bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 486a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson const llvm::Type *SBP = VMContext.getPointerTypeUnqual(llvm::Type::Int8Ty); 487a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson llvm::Constant *anno = VMContext.getConstantArray(AA->getAnnotation(), true); 488a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson llvm::Constant *unit = VMContext.getConstantArray(M->getModuleIdentifier(), 4898bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 4908bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 4918bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 4928bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 4938bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *annoGV = 49495b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, anno->getType(), false, 49595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, anno, 49695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GV->getName()); 4978bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 4988bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 49995b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, unit->getType(), false, 50095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, unit, 50195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ".str"); 5028bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 50357d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 5048bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 505a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantExprBitCast(GV, SBP), 506a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantExprBitCast(annoGV, SBP), 507a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantExprBitCast(unitGV, SBP), 508a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantInt(llvm::Type::Int32Ty, LineNo) 5098bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 510a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson return VMContext.getConstantStruct(Fields, 4, false); 5118bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 5128bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 51373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbarbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 5145c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // Never defer when EmitAllDecls is specified or the decl has 5155c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // attribute used. 51640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Features.EmitAllDecls || Global->hasAttr<UsedAttr>()) 51773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 518bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 519bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 52073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Constructors and destructors should never be deferred. 52140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<ConstructorAttr>() || 52240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<DestructorAttr>()) 52373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 52473241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 52568584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor GVALinkage Linkage = GetLinkageForFunction(getContext(), FD, Features); 526dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner 527dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner // static, static inline, always_inline, and extern inline functions can 52886daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // always be deferred. Normal inline functions can be deferred in C99/C++. 529cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 530cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner Linkage == GVA_CXXInline) 531dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return true; 532dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return false; 53373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar } 534dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner 535dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner const VarDecl *VD = cast<VarDecl>(Global); 536dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner assert(VD->isFileVarDecl() && "Invalid decl"); 537b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor 538dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return VD->getStorageClass() == VarDecl::Static; 53973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 54073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 541b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 5422a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const ValueDecl *Global = GD.getDecl(); 5432a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 544bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 545bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 54640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 547bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner return EmitAliasDefinition(Global); 548219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 54967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 5505e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 55173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 55273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 55373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 5540269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 5550269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 556bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 557bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 558b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor // In C++, if this is marked "extern", defer code generation. 5592928c2107f2e0007f35fe1c224aab63535f1403dAnders Carlsson if (getLangOptions().CPlusPlus && !VD->getInit() && 5602928c2107f2e0007f35fe1c224aab63535f1403dAnders Carlsson (VD->getStorageClass() == VarDecl::Extern || 5612928c2107f2e0007f35fe1c224aab63535f1403dAnders Carlsson VD->isExternC(getContext()))) 562b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor return; 563b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor 564b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor // In C, if this isn't a definition, defer code generation. 565b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor if (!getLangOptions().CPlusPlus && !VD->getInit()) 56673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 5674c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 5684c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 56967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 57067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 57173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (MayDeferGeneration(Global)) { 57267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // If the value has already been used, add it directly to the 57367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // DeferredDeclsToEmit list. 5742a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const char *MangledName = getMangledName(GD); 57567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (GlobalDeclMap.count(MangledName)) 5762a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDeclsToEmit.push_back(GD); 57767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner else { 57867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 57967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // first use of the mangled name will cause it to move into 58067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // DeferredDeclsToEmit. 5812a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDecls[MangledName] = GD; 58267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 583bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 584bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 585bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 586bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Otherwise emit the definition. 5872a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitGlobalDefinition(GD); 5884c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 5894c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 590b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 5912a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const ValueDecl *D = GD.getDecl(); 5922a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 5932a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 5942a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitCXXConstructor(CD, GD.getCtorType()); 5957267c1693abe7875b0c57268be05005ae013c6c9Anders Carlsson else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 5967267c1693abe7875b0c57268be05005ae013c6c9Anders Carlsson EmitCXXDestructor(DD, GD.getDtorType()); 597b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner else if (isa<FunctionDecl>(D)) 598b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner EmitGlobalFunctionDefinition(GD); 5992a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 600bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalVarDefinition(VD); 6012a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson else { 602bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(0 && "Invalid argument to EmitGlobalDefinition()"); 603bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 604bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 605bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 60674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 60774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 60874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 60974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 61074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 61174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 61274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 61374391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetOrCreateLLVMFunction(const char *MangledName, 61474391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty, 615b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner GlobalDecl D) { 6160558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 6170558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 6180558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 6190558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 6200558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 6210558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 6220558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 623a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson const llvm::Type *PTy = VMContext.getPointerTypeUnqual(Ty); 624a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson return VMContext.getConstantExprBitCast(Entry, PTy); 6250558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 6260558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 62767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 62867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 62967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 6302a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = 6319fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner DeferredDecls.find(MangledName); 63267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 63367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 63467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 63567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 63667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 637b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner } else if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl())) { 6380c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // If this the first reference to a C++ inline function in a class, queue up 6390c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // the deferred function body for emission. These are not seen as 6400c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // top-level declarations. 641b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner if (FD->isThisDeclarationADefinition() && MayDeferGeneration(FD)) 642b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner DeferredDeclsToEmit.push_back(D); 64367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 64467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 6450558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // This function doesn't have a complete type (for example, the return 6460558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // type is an incomplete struct). Use a fake type instead, and make 6470558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // sure not to try to set attributes. 648c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction = false; 6490558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (!isa<llvm::FunctionType>(Ty)) { 650a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson Ty = VMContext.getFunctionType(llvm::Type::VoidTy, 6510558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner std::vector<const llvm::Type*>(), false); 652c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman IsIncompleteFunction = true; 6530558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 6540558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *F = llvm::Function::Create(cast<llvm::FunctionType>(Ty), 6550558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function::ExternalLinkage, 656d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner "", &getModule()); 657d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner F->setName(MangledName); 658c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (D.getDecl()) 659c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman SetFunctionAttributes(cast<FunctionDecl>(D.getDecl()), F, 660c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman IsIncompleteFunction); 6610558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = F; 6620558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return F; 6630558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 6640558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 66574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 66674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 66774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 668b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 66974391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 67074391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 67174391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 672b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner Ty = getTypes().ConvertType(GD.getDecl()->getType()); 673b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(getMangledName(GD.getDecl()), Ty, GD); 67474391b48b4791cded373683a3baf67314f358d50Chris Lattner} 67577ba708819285931932ecd33691a672bb59d221aEli Friedman 67674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 67774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 67874391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 67974391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 68074391b48b4791cded373683a3baf67314f358d50Chris Lattner const char *Name) { 68174391b48b4791cded373683a3baf67314f358d50Chris Lattner // Convert Name to be a uniqued string from the IdentifierInfo table. 68274391b48b4791cded373683a3baf67314f358d50Chris Lattner Name = getContext().Idents.get(Name).getName(); 683b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); 68474391b48b4791cded373683a3baf67314f358d50Chris Lattner} 685bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 68674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 68774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 68874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 68974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 69074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 69174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 69274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 69374391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetOrCreateLLVMGlobal(const char *MangledName, 69474391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::PointerType*Ty, 69574391b48b4791cded373683a3baf67314f358d50Chris Lattner const VarDecl *D) { 6963c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 6975d4f5c724533b994de05df49ae259120482ec366Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 69899b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 69974391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 700570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 701570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner 70299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 703a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson return VMContext.getConstantExprBitCast(Entry, Ty); 70499b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 70567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 70667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 70767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 70867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 7092a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = 71067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.find(MangledName); 71167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 71267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 71367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 71467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 71567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 71667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 71767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 71899b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalVariable *GV = 7191c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 72099b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 7211c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson 0, "", 0, 72256ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 723d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner GV->setName(MangledName); 72449988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 72599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 72674391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 727f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 728f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 72974391b48b4791cded373683a3baf67314f358d50Chris Lattner GV->setConstant(D->getType().isConstant(Context)); 73049988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 73174391b48b4791cded373683a3baf67314f358d50Chris Lattner // FIXME: Merge with other attribute handling code. 73274391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D->getStorageClass() == VarDecl::PrivateExtern) 73304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 73449988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 73540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<WeakAttr>() || 73640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) 73774391b48b4791cded373683a3baf67314f358d50Chris Lattner GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 73856ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 73956ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 74074391b48b4791cded373683a3baf67314f358d50Chris Lattner } 74174391b48b4791cded373683a3baf67314f358d50Chris Lattner 74274391b48b4791cded373683a3baf67314f358d50Chris Lattner return Entry = GV; 74374391b48b4791cded373683a3baf67314f358d50Chris Lattner} 744eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 745eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 74674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 74774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 74874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 74974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 75074391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 75174391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 75274391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 75374391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 75474391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 75574391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 75674391b48b4791cded373683a3baf67314f358d50Chris Lattner 75774391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::PointerType *PTy = 758a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getPointerType(Ty, ASTTy.getAddressSpace()); 75974391b48b4791cded373683a3baf67314f358d50Chris Lattner return GetOrCreateLLVMGlobal(getMangledName(D), PTy, D); 76074391b48b4791cded373683a3baf67314f358d50Chris Lattner} 7613f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 76274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 76374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 76474391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 76574391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 76674391b48b4791cded373683a3baf67314f358d50Chris Lattner const char *Name) { 76774391b48b4791cded373683a3baf67314f358d50Chris Lattner // Convert Name to be a uniqued string from the IdentifierInfo table. 76874391b48b4791cded373683a3baf67314f358d50Chris Lattner Name = getContext().Idents.get(Name).getName(); 769a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson return GetOrCreateLLVMGlobal(Name, VMContext.getPointerTypeUnqual(Ty), 0); 770bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 771bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 77203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 77303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 77403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 7757520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 7767520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 7777520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 7787520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 7797520bd1de12af10ea08c662440565adbdf589317Douglas Gregor const char *MangledName = getMangledName(D); 7807520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (GlobalDeclMap.count(MangledName) == 0) { 7812a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDecls[MangledName] = GlobalDecl(D); 78203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 7837520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 7847520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 7857520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 7867520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 78703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 78803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 78903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 790bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 7918f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 79277ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 793b75863d53b8a2bbf0ece8e6df2b6e5be7f3896c4Chris Lattner 7948f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner if (D->getInit() == 0) { 795cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 79603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 79703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 79803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 79903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 80003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 80103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 80203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 80303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 80403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 80569243825cb5c91ec7207256aa57ae327cfaf8cb2Owen Anderson Init = getLLVMContext().getNullValue(getTypes().ConvertTypeForMem(ASTTy)); 80677ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 807e9352cc9818ba59e7cf88500ef048991c90f3821Anders Carlsson Init = EmitConstantExpr(D->getInit(), D->getType()); 8086e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 809232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar ErrorUnsupported(D, "static initializer"); 8106e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman QualType T = D->getInit()->getType(); 811a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson Init = VMContext.getUndef(getTypes().ConvertType(T)); 8126e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 8138f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 8148e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 8152d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 816570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 817570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner 818570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 819570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 8209d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 8219d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 8229d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 823570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 824570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 8253c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar 826570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 827570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 828570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner 829570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 830570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 831570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 832570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 833570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 834570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 835570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 836570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 837570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 838570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 839570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 840570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { 841570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner 842570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Remove the old entry from GlobalDeclMap so that we'll create a new one. 843570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GlobalDeclMap.erase(getMangledName(D)); 844232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 845570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 846570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 8470558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner GV->takeName(cast<llvm::GlobalValue>(Entry)); 8480558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 84977ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 85077ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::Constant *NewPtrForOldDecl = 851a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantExprBitCast(GV, Entry->getType()); 852570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 85377ba708819285931932ecd33691a672bb59d221aEli Friedman 85477ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 855570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 85677ba708819285931932ecd33691a672bb59d221aEli Friedman } 85777ba708819285931932ecd33691a672bb59d221aEli Friedman 85840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 8598bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 8608bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 861f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 8628bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 8638bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 86488a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 865b381aac9bae6d608c72267dd0ed08ec6369e94e4Nuno Lopes GV->setConstant(D->getType().isConstant(Context)); 8660de40af3a3aa14e3854c0eafeabd08f6762801f9Eli Friedman GV->setAlignment(getContext().getDeclAlignInBytes(D)); 86708d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman 86888a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 8698fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner if (D->getStorageClass() == VarDecl::Static) 8708fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 87140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 872ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLImportLinkage); 87340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 874ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLExportLinkage); 87540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<WeakAttr>()) 876286acbdbe0c82e9a6bcad5fca3c4fa582f3f1a2cMike Stump GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 87704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar else if (!CompileOpts.NoCommon && 87804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar (!D->hasExternalStorage() && !D->getInit())) 87904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::CommonLinkage); 8807e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar else 88104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); 8827e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar 8837c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 88404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 885686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta // Emit global variable debug information. 8862d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner if (CGDebugInfo *DI = getDebugInfo()) { 88766031a5594bc9a7dc0dc5137c3e7955f835e4639Daniel Dunbar DI->setLocation(D->getLocation()); 888686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta DI->EmitGlobalVariable(GV, D); 889686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 89088a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 8915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 892bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 893bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 894bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 895bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 896bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 897bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 898bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 899bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 900bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 901bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 902bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 903bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 904bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 905bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 906bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 907bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 908bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 909bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 910bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 911bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner UI != E; ) { 912bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 91308c93a7f2210b464e5abe298a5474b99414615f6Chris Lattner unsigned OpNo = UI.getOperandNo(); 914bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*UI++); 91508c93a7f2210b464e5abe298a5474b99414615f6Chris Lattner if (!CI || OpNo != 0) continue; 916bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 917bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 918bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 919bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 920bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 921bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 922bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 923bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 924bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 925bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 926bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 927bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 928bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 929bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getNumOperands()-1 == ArgNo || 930bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->getOperand(ArgNo+1)->getType() != AI->getType()) { 931bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 932bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 933bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 934bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 935bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 936bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 937bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 938bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 939bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 940bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.append(CI->op_begin()+1, CI->op_begin()+1+ArgNo); 941bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 942bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 943bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 944bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (NewCall->getType() != llvm::Type::VoidTy) 945bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 946bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setCallingConv(CI->getCallingConv()); 947bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 948bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 949bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 950bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!CI->use_empty()) 951bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->replaceAllUsesWith(NewCall); 952bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 953bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 954bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 955bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 956bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 957b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 9582b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson const llvm::FunctionType *Ty; 959b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 960b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner 9612b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { 9622b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson bool isVariadic = D->getType()->getAsFunctionProtoType()->isVariadic(); 9632b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson 9642b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = getTypes().GetFunctionType(getTypes().getFunctionInfo(MD), isVariadic); 9652b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } else { 9662b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = cast<llvm::FunctionType>(getTypes().ConvertType(D->getType())); 9672b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson 9682b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // As a special case, make sure that definitions of K&R function 9692b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // "type foo()" aren't declared as varargs (which forces the backend 9702b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // to do unnecessary work). 9712b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (D->getType()->isFunctionNoProtoType()) { 9722b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson assert(Ty->isVarArg() && "Didn't lower type as expected"); 9732b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // Due to stret, the lowered function could have arguments. 9742b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // Just create the same type as was lowered by ConvertType 9752b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // but strip off the varargs bit. 9762b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson std::vector<const llvm::Type*> Args(Ty->param_begin(), Ty->param_end()); 977a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson Ty = VMContext.getFunctionType(Ty->getReturnType(), Args, false); 9782b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } 979ff75e1db95a53c7606e0bb114cf9adc59ab3d7f6Chris Lattner } 980d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar 9819fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 982b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 98334809507232bc4c3c4840c7d092c7440219fddafChris Lattner 9840558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 9850558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 9860558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 9870558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 9880558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 9890558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 9900558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 9910558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 992bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 993bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 99442745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 995bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 9960558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 99734809507232bc4c3c4840c7d092c7440219fddafChris Lattner 99862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 99962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 100062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 100162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 100262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 100362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 100462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f(int x)"). Start by making a new function of the 100562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // correct type, RAUW, then steal the name. 100634809507232bc4c3c4840c7d092c7440219fddafChris Lattner GlobalDeclMap.erase(getMangledName(D)); 1007b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 1008bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewFn->takeName(OldFn); 1009bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1010bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1011bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1012bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 10139fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1014bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 10159fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 10169fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 101762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 101862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1019bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 1020bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Constant *NewPtrForOldDecl = 1021a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantExprBitCast(NewFn, Entry->getType()); 1022bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1023bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 102462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 102562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1026bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 102762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 10280558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1029bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 10300558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 10310558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 1032bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1033219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 10346379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 10357c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 10367c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 1037219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 103840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1039219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 104040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1041219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1042bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1043bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1044bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattnervoid CodeGenModule::EmitAliasDefinition(const ValueDecl *D) { 104540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1046bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1047bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1048bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1049bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1050bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Unique the name through the identifier table. 1051bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const char *AliaseeName = AA->getAliasee().c_str(); 1052bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner AliaseeName = getContext().Idents.get(AliaseeName).getName(); 1053bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1054bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1055bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1056bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1057bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 1058b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner Aliasee = GetOrCreateLLVMFunction(AliaseeName, DeclTy, GlobalDecl()); 1059bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1060bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Aliasee = GetOrCreateLLVMGlobal(AliaseeName, 1061a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getPointerTypeUnqual(DeclTy), 0); 1062bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1063bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 1064bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::GlobalValue *GA = 1065bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1066bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1067bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 1068bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1069bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // See if there is already something with the alias' name in the module. 1070bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const char *MangledName = getMangledName(D); 1071bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 1072bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1073bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry && !Entry->isDeclaration()) { 1074bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a definition in the module, then it wins over the alias. 1075bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // This is dubious, but allow it to be safe. Just ignore the alias. 1076bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner GA->eraseFromParent(); 1077bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner return; 1078bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 1079bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1080bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1081bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1082bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1083bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1084bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1085bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1086bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1087bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1088bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1089a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson Entry->replaceAllUsesWith(VMContext.getConstantExprBitCast(GA, 1090bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1091bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1092bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 1093bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1094bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Now we know that there is no conflict, set the name. 1095bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry = GA; 1096bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner GA->setName(MangledName); 1097bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 10987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 10997c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 11007c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 110140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 11027c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 11037c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 11046fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (FD->getBody()) 11057c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 11067c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 11077c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 11087c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 110940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis } else if (D->hasAttr<WeakAttr>() || 111040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) { 11117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 11127c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 11137c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 11147c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1115bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1116bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1117b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1118b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 1119c136e6cf237711f9f1324637a0b2cdf6ae8e79e4Mike Stumpllvm::Value *CodeGenModule::getBuiltinLibFunction(unsigned BuiltinID) { 11203e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 11213e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 11223e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 1123bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 11243e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 11253e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 11263e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 11273e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 1128bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 1129bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // Get the type for the builtin. 113086df27bbdbb98c39ec2184695c0561209f91beddChris Lattner ASTContext::GetBuiltinTypeError Error; 113186df27bbdbb98c39ec2184695c0561209f91beddChris Lattner QualType Type = Context.GetBuiltinType(BuiltinID, Error); 113286df27bbdbb98c39ec2184695c0561209f91beddChris Lattner assert(Error == ASTContext::GE_None && "Can't get builtin type"); 1133370ab3f1373841d70582feac9e35c3c6b3489f63Douglas Gregor 1134bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner const llvm::FunctionType *Ty = 1135bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner cast<llvm::FunctionType>(getTypes().ConvertType(Type)); 1136bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 1137b808c952bbff821dce727dd801a1098d64394f98Chris Lattner // Unique the name through the identifier table. 1138b808c952bbff821dce727dd801a1098d64394f98Chris Lattner Name = getContext().Idents.get(Name).getName(); 1139bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // FIXME: param attributes for sext/zext etc. 1140b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl()); 1141bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1142bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 11437acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 11447acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 11457acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 11467acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 11477acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1148bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 11495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerllvm::Function *CodeGenModule::getMemCpyFn() { 11505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (MemCpyFn) return MemCpyFn; 11514e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *IntPtr = TheTargetData.getIntPtrType(); 11524e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemCpyFn = getIntrinsic(llvm::Intrinsic::memcpy, &IntPtr, 1); 11535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1154c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 11550c99509927a0c7a48490486b9fec287b63e5c09cEli Friedmanllvm::Function *CodeGenModule::getMemMoveFn() { 11560c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman if (MemMoveFn) return MemMoveFn; 11574e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *IntPtr = TheTargetData.getIntPtrType(); 11584e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemMoveFn = getIntrinsic(llvm::Intrinsic::memmove, &IntPtr, 1); 11590c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman} 11600c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman 116141ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venanciollvm::Function *CodeGenModule::getMemSetFn() { 116241ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio if (MemSetFn) return MemSetFn; 11634e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *IntPtr = TheTargetData.getIntPtrType(); 11644e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemSetFn = getIntrinsic(llvm::Intrinsic::memset, &IntPtr, 1); 116541ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio} 11667acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner 1167e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlssonstatic void appendFieldAndPadding(CodeGenModule &CGM, 1168e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson std::vector<llvm::Constant*>& Fields, 116944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldDecl *FieldD, FieldDecl *NextFieldD, 117044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor llvm::Constant* Field, 11713c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner RecordDecl* RD, const llvm::StructType *STy) { 1172e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson // Append the field. 1173e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson Fields.push_back(Field); 1174e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 117544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor int StructFieldNo = CGM.getTypes().getLLVMFieldNo(FieldD); 1176e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1177e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson int NextStructFieldNo; 117844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (!NextFieldD) { 1179e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson NextStructFieldNo = STy->getNumElements(); 1180e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson } else { 118144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextStructFieldNo = CGM.getTypes().getLLVMFieldNo(NextFieldD); 1182e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson } 1183e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1184e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson // Append padding 1185e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson for (int i = StructFieldNo + 1; i < NextStructFieldNo; i++) { 1186e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson llvm::Constant *C = 118769243825cb5c91ec7207256aa57ae327cfaf8cb2Owen Anderson CGM.getLLVMContext().getNullValue(STy->getElementType(StructFieldNo + 1)); 1188e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1189e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson Fields.push_back(C); 1190e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson } 1191e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson} 1192e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 11931d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 11941d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 11951d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 11961d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 11971d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 11981d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned NumBytes = Literal->getByteLength(); 11991d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 12001d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Check for simple case. 12011d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 12021d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = NumBytes; 12031d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), 12041d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength)); 12051d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar } 12061d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 12071d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 12081d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); 12091d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const UTF8 *FromPtr = (UTF8 *)Literal->getStrData(); 12101d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 1211e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff 12121d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar ConversionResult Result = ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 12131d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar &ToPtr, ToPtr + NumBytes, 12141d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar strictConversion); 12151d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 12161d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Check for conversion failure. 12171d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (Result != conversionOK) { 12181d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // FIXME: Have Sema::CheckObjCString() validate the UTF-8 string and remove 12191d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // this duplicate code. 12201d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar assert(Result == sourceIllegal && "UTF-8 to UTF-16 conversion failed"); 12211d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = NumBytes; 12221d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), 12231d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength)); 1224e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff } 12251d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 12261d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // FIXME: Storing UTF-16 in a C string is a hack to test Unicode strings 12271d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // without doing more surgery to this routine. Since we aren't explicitly 12281d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // checking for endianness here, it's also a bug (when generating code for 12291d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // a target that doesn't match the host endianness). Modeling this as an 12301d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // i16 array is likely the cleanest solution. 12311d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 12321d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 12331d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef((char *)&ToBuf[0], 12341d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength * 2)); 12351d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 12361d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 12371d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 12381d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 12391d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 12401d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 12411d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 12421d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar GetConstantCFStringEntry(CFConstantStringMap, Literal, isUTF16, 12431d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength); 1244c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 12451d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 12461d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 1247c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 124869243825cb5c91ec7207256aa57ae327cfaf8cb2Owen Anderson llvm::Constant *Zero = getLLVMContext().getNullValue(llvm::Type::Int32Ty); 12493e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 1250c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 12519d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1252c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1253c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 1254a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson Ty = VMContext.getArrayType(Ty, 0); 12559d4a15fd3b85434c43ea27562793de63a793321aChris Lattner llvm::Constant *GV = CreateRuntimeVariable(Ty, 12569d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 12573e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 12583e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 1259a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantExprGetElementPtr(GV, Zeros, 2); 1260c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 1261c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1262e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 126335366a67baa970c287c714c957cf78a4131cf60dTed Kremenek RecordDecl *CFRD = CFTy->getAsRecordType()->getDecl(); 12643e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 1265e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson const llvm::StructType *STy = 1266e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1267e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1268e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson std::vector<llvm::Constant*> Fields; 126917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis RecordDecl::field_iterator Field = CFRD->field_begin(); 127044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1271c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 127244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldDecl *CurField = *Field++; 127344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldDecl *NextField = *Field++; 127444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 127544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CFConstantStringClassRef, CFRD, STy); 1276c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1277c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 127844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CurField = NextField; 127944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextField = *Field++; 12803e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 128144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 1282a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson isUTF16 ? VMContext.getConstantInt(Ty, 0x07d0) 1283a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson : VMContext.getConstantInt(Ty, 0x07C8), 1284e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff CFRD, STy); 1285c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1286c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 128744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CurField = NextField; 128844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextField = *Field++; 12891d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::Constant *C = VMContext.getConstantArray(Entry.getKey().str()); 1290a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 1291a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar const char *Sect, *Prefix; 1292a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar bool isConstant; 129395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1294a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1295a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Prefix = getContext().Target.getUnicodeStringSymbolPrefix(); 1296a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Sect = getContext().Target.getUnicodeStringSection(); 129795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner // FIXME: why do utf strings get "l" labels instead of "L" labels? 129895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1299a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar // FIXME: Why does GCC not set constant here? 1300a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar isConstant = false; 1301a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 130295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Prefix = ".str"; 1303a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Sect = getContext().Target.getCFStringDataSection(); 130495b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::PrivateLinkage; 1305a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar // FIXME: -fwritable-strings should probably affect this, but we 1306a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar // are following gcc here. 1307a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar isConstant = true; 1308a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 13098e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar llvm::GlobalVariable *GV = 13101c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(getModule(), C->getType(), isConstant, 131195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage, C, Prefix); 1312a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (Sect) 13138e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 1314a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1315a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar unsigned Align = getContext().getTypeAlign(getContext().ShortTy)/8; 1316a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar GV->setAlignment(Align); 1317a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 131844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 1319a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantExprGetElementPtr(GV, Zeros, 2), 1320e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson CFRD, STy); 1321c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1322c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 132344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CurField = NextField; 132444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextField = 0; 1325c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 132644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 1327a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext.getConstantInt(Ty, StringLength), CFRD, STy); 1328c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1329c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 1330a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson C = VMContext.getConstantStruct(STy, Fields); 13311c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 133295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalVariable::PrivateLinkage, C, 133395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 13348e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 13358e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 13361d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 13373e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 13380c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1339c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 134045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 13416143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 13421e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 13436143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 13441e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const char *StrData = E->getStrData(); 13451e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar unsigned Len = E->getByteLength(); 13461e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 13471e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 13481e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar getContext().getAsConstantArrayType(E->getType()); 13491e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 13501e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 1351dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 13521e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar std::string Str(StrData, StrData+Len); 13531e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 1354dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner 1355dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 1356dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner RealLen *= getContext().Target.getWCharWidth()/8; 1357dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner 13581e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 13591e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 13601e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 13611e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 13621e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 13636143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 13646143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 13656143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 13666143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 13676143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 13686143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar return GetAddrOfConstantString(GetStringForStringLiteral(S)); 13696143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 13706143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1371eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1372eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1373eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1374eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1375eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1376eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1377a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1378a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1379eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1380eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1381eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1382a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 138345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattnerstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 138445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 13855fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 13865fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 13876143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 1388a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson llvm::Constant *C = CGM.getLLVMContext().getConstantArray(str, false); 138945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 139045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 13911c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson return new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 139295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, 13931c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson C, GlobalName); 139445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 139545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 13966143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 13976143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 13986143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 13996143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 14006143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 14016143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 14026143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 14036143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 14045fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, 14055fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 14068e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 14078e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 14088e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 14098e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 141095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 14118e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 14128e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 14138e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 14145fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar return GenerateStringLiteral(str, false, *this, GlobalName); 141545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 141645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner llvm::StringMapEntry<llvm::Constant *> &Entry = 141795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 141845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 141945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1420eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 142145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 142245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 14235fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); 142445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 142545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 142645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 14276143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 14286143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 14296143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 14306143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 14315fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, 14325fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 1433c9f29c61856ffb5f643cedbe87ac076f21a1381aChris Lattner return GetAddrOfConstantString(str + '\0', GlobalName); 14346143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 143541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1436af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1437af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 1438af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbarvoid CodeGenModule::EmitObjCPropertyImplementations(const 1439af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 1440653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor for (ObjCImplementationDecl::propimpl_iterator 144117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 1442af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 1443af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1444af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1445af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1446af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1447af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1448af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1449af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1450af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1451af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1452af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 145317945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 1454fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1455fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1456af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 145717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 1458fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1459fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1460af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1461af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1462af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1463af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 146491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 1465984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 146617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 1467984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 1468984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 1469984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 1470984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 147191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 147291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 147391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson if (LSD->getLanguage() != LinkageSpecDecl::lang_c) { 147491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 147591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 147691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 147791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 147817945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 147991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 148091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 148191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 148291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 148341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 148441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 148541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 148641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 148741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 148841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 148941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 149041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 149116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 149216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 149316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 149416e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor 149541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 14962b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 149741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 149816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 149916e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 150016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 150116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor 150216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Fall through 150316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor 150441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 15052a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitGlobal(GlobalDecl(cast<ValueDecl>(D))); 150641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 150741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 150895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 150941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 1510984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 151141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 15129cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 15139cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 1514127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 1515127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 15169cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 151795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 151895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 151995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 152027ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 152127ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 152227ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 152336674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 152436674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 152536674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 152636674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 152736674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 152895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 152941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 153038e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 153141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 153241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 1533b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCCategory: 1534b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 153541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1536285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 153741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 1538b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 153941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 154041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 154141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 1542af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 1543af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 154441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 154541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 154641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1547af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 1548af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 1549af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 1550af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 155141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1552af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 155341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 155441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 155541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 15566fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 155741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 155841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 155941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 156041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCompatibleAlias: 1561305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 156241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 156341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 156491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 156591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 156641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 156741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 156841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 156941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 157041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar std::string AsmString(AD->getAsmString()->getStrData(), 157141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar AD->getAsmString()->getByteLength()); 157241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 157341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 157441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 157541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 157641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 157741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(S + '\n' + AsmString); 157841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 157941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 158041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 158141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar default: 1582f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 1583f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 1584f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 158541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 158641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 158741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 1588