CodeGenModule.cpp revision 16e8be2ac532358d4e413fdfa2643b1876edda78
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), 432a998148a6823c44d67da347c95eb2ea21f6b986Mike Stump MemCpyFn(0), MemMoveFn(0), MemSetFn(0), CFConstantStringClassRef(0) { 44208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar 453c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner if (!Features.ObjC1) 463c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = 0; 473c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (!Features.NeXTRuntime) 483c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateGNUObjCRuntime(*this); 493c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (Features.ObjCNonFragileABI) 503c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacNonFragileABIObjCRuntime(*this); 513c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else 523c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacObjCRuntime(*this); 53e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 54e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 55bd3606426d389370616126af969904ec493cb105Chris Lattner DebugInfo = CompileOpts.DebugInfo ? new CGDebugInfo(this) : 0; 562b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 572b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 582b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 59815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 60815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 61815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 62815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 63815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 6482227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 65208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 66208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 67208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 686bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 696bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 70532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 710269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 72f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 73f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 74488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 752c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 7690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 7790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 7890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 7990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 80488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 8156b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 822c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 830a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 840a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 852c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 8658c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 87488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 88c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 8990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 9090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 9190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 9290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 93488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 9456b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 95c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 960a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 97c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 98c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 9904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel DunbarLangOptions::VisibilityMode 10004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel DunbarCodeGenModule::getDeclVisibilityMode(const Decl *D) const { 10104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 10204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (VD->getStorageClass() == VarDecl::PrivateExtern) 10304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 10404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 10568584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>(getContext())) { 10604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (attr->getVisibility()) { 10704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar default: assert(0 && "Unknown visibility!"); 10804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::DefaultVisibility: 10904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Default; 11004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::HiddenVisibility: 11104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 11204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::ProtectedVisibility: 11304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Protected; 11404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar } 1157e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1166ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 11704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return getLangOptions().getVisibilityMode(); 1184f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman} 1194f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman 12004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbarvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 12104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar const Decl *D) const { 12204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 123df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 1247e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 1256ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 1267e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1276ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 12804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (getDeclVisibilityMode(D)) { 1297cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian default: assert(0 && "Unknown visibility!"); 13004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Default: 13104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 13204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Hidden: 13304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 13404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Protected: 13504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); 1367cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian } 1377cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 1387cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 1392a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlssonconst char *CodeGenModule::getMangledName(const GlobalDecl &GD) { 1402a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const NamedDecl *ND = GD.getDecl(); 1412a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 1422a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 1432a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledCXXCtorName(D, GD.getCtorType()); 1442a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 1452a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledCXXDtorName(D, GD.getDtorType()); 1462a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 1472a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledName(ND); 1482a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson} 1492a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 1505f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// \brief Retrieves the mangled name for the given declaration. 1515f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1525f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// If the given declaration requires a mangled name, returns an 153c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// const char* containing the mangled name. Otherwise, returns 154c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// the unmangled name. 1555f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1566ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregorconst char *CodeGenModule::getMangledName(const NamedDecl *ND) { 157c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner // In C, functions with no attributes never need to be mangled. Fastpath them. 158c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner if (!getLangOptions().CPlusPlus && !ND->hasAttrs()) { 159c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); 1603c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return ND->getNameAsCString(); 161c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner } 162c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner 1636ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor llvm::SmallString<256> Name; 1646ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor llvm::raw_svector_ostream Out(Name); 165fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar if (!mangleName(ND, Context, Out)) { 166fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); 1673c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return ND->getNameAsCString(); 168fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar } 1695f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 1706ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor Name += '\0'; 17195d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson return UniqueMangledName(Name.begin(), Name.end()); 17295d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson} 17395d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson 17495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlssonconst char *CodeGenModule::UniqueMangledName(const char *NameStart, 17595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson const char *NameEnd) { 17695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson assert(*(NameEnd - 1) == '\0' && "Mangled name must be null terminated!"); 17795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson 17895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson return MangledNames.GetOrCreateValue(NameStart, NameEnd).getKeyData(); 1795f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 1805f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 1816d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 1826d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 1836bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 18449988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 1856bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 1866d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 1876d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 1886bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 1896bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 1906bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 19149988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 1926bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 1936bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 1946bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 1956bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 1966bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 1976bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 1986bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType::get(llvm::Type::VoidTy, 1996bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<const llvm::Type*>(), 2006bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar false); 2016bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 2026bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2036bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 204572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::StructType* CtorStructTy = 2056bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::StructType::get(llvm::Type::Int32Ty, 2066bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::PointerType::getUnqual(CtorFTy), NULL); 2076bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2086bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 2096bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 2106bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 2116bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 2126bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar S.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, I->second, false)); 2136bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 2146bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 2156bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 2166bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2176bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 2186bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 2196bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar new llvm::GlobalVariable(AT, false, 220572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 2216bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::ConstantArray::get(AT, Ctors), 2226bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalName, 223572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner &TheModule); 2246d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 2256d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 2266d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 227532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 228532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 229532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 230532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 231532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 232532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 233532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 234532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 235532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 236532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::GlobalValue *gv = 237532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman new llvm::GlobalVariable(Array->getType(), false, 238532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::GlobalValue::AppendingLinkage, Array, 239532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman "llvm.global.annotations", &TheModule); 240532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 241532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 242532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 24386daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattnerstatic CodeGenModule::GVALinkage 24468584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas GregorGetLinkageForFunction(ASTContext &Context, const FunctionDecl *FD, 24568584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor const LangOptions &Features) { 246167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 247167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson // C++ member functions defined inside the class are always inline. 248f5cecfbdcd20be224861f9e67c5973a9a2b61512Argyrios Kyrtzidis if (MD->isInline() || !MD->isOutOfLine()) 249167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson return CodeGenModule::GVA_CXXInline; 250167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson 251167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson return CodeGenModule::GVA_StrongExternal; 252167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson } 253167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson 25443907e87c776391d7d96da04b48e7bf06d8baafcEli Friedman // "static" functions get internal linkage. 2555e222139610a9f8b2b5f4ddd112f10dec9ec1e97Eli Friedman if (FD->getStorageClass() == FunctionDecl::Static) 2567c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar return CodeGenModule::GVA_Internal; 2577c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 258005eedce54da6580de37bb115bf581008637e4b1Chris Lattner if (!FD->isInline()) 259cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner return CodeGenModule::GVA_StrongExternal; 26086daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner 261d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner // If the inline function explicitly has the GNU inline attribute on it, or if 262d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner // this is C89 mode, we use to GNU semantics. 2639f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor if (!Features.C99 && !Features.CPlusPlus) { 264d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner // extern inline in GNU mode is like C99 inline. 2659f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor if (FD->getStorageClass() == FunctionDecl::Extern) 2669f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor return CodeGenModule::GVA_C99Inline; 2679f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor // Normal inline is a strong symbol. 2689f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor return CodeGenModule::GVA_StrongExternal; 26968584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor } else if (FD->hasActiveGNUInlineAttribute(Context)) { 2709f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor // GCC in C99 mode seems to use a different decision-making 2719f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor // process for extern inline, which factors in previous 2729f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor // declarations. 27368584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (FD->isExternGNUInline(Context)) 274d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner return CodeGenModule::GVA_C99Inline; 275d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner // Normal inline is a strong symbol. 276cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner return CodeGenModule::GVA_StrongExternal; 277d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner } 278cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner 27986daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // The definition of inline changes based on the language. Note that we 28086daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // have already handled "static inline" above, with the GVA_Internal case. 281cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner if (Features.CPlusPlus) // inline and extern inline. 28286daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner return CodeGenModule::GVA_CXXInline; 28386daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner 284d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner assert(Features.C99 && "Must be in C99 mode if not in C89 or C++ mode"); 285b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor if (FD->isC99InlineDefinition()) 286b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor return CodeGenModule::GVA_C99Inline; 287b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor 288b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor return CodeGenModule::GVA_StrongExternal; 2897c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 2907c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 2917c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar/// SetFunctionDefinitionAttributes - Set attributes for a global. 292b97b69244a4e7916c7b8fca28fa21b36ce5b30b2Daniel Dunbar/// 293f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump/// FIXME: This is currently only done for aliases and functions, but not for 294f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump/// variables (these details are set in EmitGlobalVarDefinition for variables). 2957c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 2967c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 29768584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor GVALinkage Linkage = GetLinkageForFunction(getContext(), D, Features); 2987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 29955d6f50b23a1fd0a04b568787a25beb7537e6c9bDaniel Dunbar if (Linkage == GVA_Internal) { 3009f9427999cf69b3b89cd0ed3be16ed27a1c282c7Chris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 30168584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor } else if (D->hasAttr<DLLExportAttr>(getContext())) { 3027c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setLinkage(llvm::Function::DLLExportLinkage); 30368584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor } else if (D->hasAttr<WeakAttr>(getContext())) { 30444b0bc008ee11cdee69ad12210ca7550e4fa426aChris Lattner GV->setLinkage(llvm::Function::WeakAnyLinkage); 305cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner } else if (Linkage == GVA_C99Inline) { 306cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 307cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // definition somewhere else, so we can use available_externally linkage. 308d9d049a93c55624908e81cf3927b7905efeba05fChris Lattner GV->setLinkage(llvm::Function::AvailableExternallyLinkage); 30986daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner } else if (Linkage == GVA_CXXInline) { 31086daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // In C++, the compiler has to emit a definition in every translation unit 31186daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // that references the function. We should use linkonce_odr because 31286daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // a) if all references in this translation unit are optimized away, we 31386daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 31486daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 31586daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // definition is dependable. 31686daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner GV->setLinkage(llvm::Function::LinkOnceODRLinkage); 3177c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 318cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner assert(Linkage == GVA_StrongExternal); 319cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // Otherwise, we have strong external linkage. 3207c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setLinkage(llvm::Function::ExternalLinkage); 3210dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar } 322d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 3237c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 324d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 325d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 3267dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 3277dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar const CGFunctionInfo &Info, 3287dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 329761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 33088b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbar ConstructAttributeList(Info, D, AttributeList); 331c134fcb0d7989fe6937e47e6216637647e074aefEli Friedman 332761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 333761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeList.size())); 334ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman 335ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman // Set the appropriate calling convention for the Function. 33668584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (D->hasAttr<FastCallAttr>(getContext())) 337f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov F->setCallingConv(llvm::CallingConv::X86_FastCall); 338f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov 33968584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (D->hasAttr<StdCallAttr>(getContext())) 340f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov F->setCallingConv(llvm::CallingConv::X86_StdCall); 341f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 342f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3437c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 3447c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 34574ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 346f93349f3ec4d69eafba42436c33aaa91bfca7e70Daniel Dunbar F->addFnAttr(llvm::Attribute::NoUnwind); 347af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 34868584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (D->hasAttr<AlwaysInlineAttr>(getContext())) 349af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 35081ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson 35168584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (D->hasAttr<NoinlineAttr>(getContext())) 35281ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 353f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 354f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3557c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetCommonAttributes(const Decl *D, 3567c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 3577c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar setGlobalVisibility(GV, D); 3587c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 35968584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (D->hasAttr<UsedAttr>(getContext())) 3607c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 3617c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 36268584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (const SectionAttr *SA = D->getAttr<SectionAttr>(getContext())) 3637c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 3647c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 3657c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3660e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 3670e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 3680e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 3690e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 3700e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 3717c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3727c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 3737c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3740e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 375f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 376f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 377f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbarvoid CodeGenModule::SetFunctionAttributes(const FunctionDecl *FD, 378c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 379c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 380c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 381c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(FD), F); 38245c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 3837c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 3847c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 3857c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 38668584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (FD->hasAttr<DLLImportAttr>(getContext())) { 3877c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 38868584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor } else if (FD->hasAttr<WeakAttr>(getContext()) || 38968584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor FD->hasAttr<WeakImportAttr>(getContext())) { 3907c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 3917c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // separate linkage types for this. 3927c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 3937c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 3947c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalLinkage); 3957c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 3967c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 39768584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (const SectionAttr *SA = FD->getAttr<SectionAttr>(getContext())) 3987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 399219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 400219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 4010269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 4020269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar assert(!GV->isDeclaration() && 4030269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 40435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 4050269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 4060269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4070269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 4080269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 409c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian // FIXME. Runtime indicates that there might be more 'used' symbols; but not 410c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian // necessariy. So, this test is not accurate for emptiness. 411c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (LLVMUsed.empty() && !Runtime) 4120269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 4130269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 41435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner llvm::Type *i8PTy = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 41535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner 41635f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 41735f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 41835f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 41935f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 42035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray[i] = 42135f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), i8PTy); 42235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 42335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner 424c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (Runtime) 425c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian Runtime->MergeMetadataGlobals(UsedArray); 426c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 427c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 428c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 429c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian 4300269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalVariable *GV = 4310269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar new llvm::GlobalVariable(ATy, false, 4320269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 43335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner llvm::ConstantArray::get(ATy, UsedArray), 4340269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "llvm.used", &getModule()); 4350269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4360269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 4370269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 4380269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4390269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 44067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 44167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 44267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 44367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner while (!DeferredDeclsToEmit.empty()) { 4442a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 44567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 44667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 44767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // The mangled name for the decl must have been emitted in GlobalDeclMap. 44867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Look it up to see if it was defined with a stronger definition (e.g. an 44967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // extern inline function with a strong function redefinition). If so, 45067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // just ignore the deferred decl. 45167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner llvm::GlobalValue *CGRef = GlobalDeclMap[getMangledName(D)]; 45267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 453b723f7520bcce5f13ccaae557c16a1e7133b6908Anders Carlsson 45467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 45567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 45667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 45767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 45867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 45967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 4605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4628bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 4638bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 4648bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 4653c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar/// GlobalValue being annotated. The second field is the constant string 4668bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// created from the AnnotateAttr's annotation. The third field is a constant 4678bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 4688bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 4698bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4708bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 4718bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 4728bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4738bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begemanllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 4748bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 4758bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 4768bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 4778bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 4788bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 4798bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 4808bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const llvm::Type *SBP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 4818bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *anno = llvm::ConstantArray::get(AA->getAnnotation(), true); 4828bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *unit = llvm::ConstantArray::get(M->getModuleIdentifier(), 4838bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 4848bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 4858bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 4868bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 4878e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar const char *StringPrefix = getContext().Target.getStringSymbolPrefix(true); 4888bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *annoGV = 4898bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman new llvm::GlobalVariable(anno->getType(), false, 4908bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue::InternalLinkage, anno, 4918e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->getName() + StringPrefix, M); 4928bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 4938bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 4948bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman new llvm::GlobalVariable(unit->getType(), false, 4958e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar llvm::GlobalValue::InternalLinkage, unit, 4968e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar StringPrefix, M); 4978bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 49857d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 4998bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 5008bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantExpr::getBitCast(GV, SBP), 5018bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantExpr::getBitCast(annoGV, SBP), 5028bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantExpr::getBitCast(unitGV, SBP), 5038bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantInt::get(llvm::Type::Int32Ty, LineNo) 5048bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 5058bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman return llvm::ConstantStruct::get(Fields, 4, false); 5068bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 5078bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 50873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbarbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 5095c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // Never defer when EmitAllDecls is specified or the decl has 5105c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // attribute used. 51168584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (Features.EmitAllDecls || Global->hasAttr<UsedAttr>(getContext())) 51273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 513bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 514bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 51573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Constructors and destructors should never be deferred. 51668584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (FD->hasAttr<ConstructorAttr>(getContext()) || 51768584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor FD->hasAttr<DestructorAttr>(getContext())) 51873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 51973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 52068584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor GVALinkage Linkage = GetLinkageForFunction(getContext(), FD, Features); 521dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner 522dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner // static, static inline, always_inline, and extern inline functions can 52386daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // always be deferred. Normal inline functions can be deferred in C99/C++. 524cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 525cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner Linkage == GVA_CXXInline) 526dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return true; 527dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return false; 52873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar } 529dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner 530dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner const VarDecl *VD = cast<VarDecl>(Global); 531dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner assert(VD->isFileVarDecl() && "Invalid decl"); 532b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor 533dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return VD->getStorageClass() == VarDecl::Static; 53473241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 53573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 536b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 5372a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const ValueDecl *Global = GD.getDecl(); 5382a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 539bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 540bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 54168584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (Global->hasAttr<AliasAttr>(getContext())) 542bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner return EmitAliasDefinition(Global); 543219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 54467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 5455e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 54673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 54773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 54873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 5490269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 5500269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 551bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 552bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 553b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor // In C++, if this is marked "extern", defer code generation. 5542928c2107f2e0007f35fe1c224aab63535f1403dAnders Carlsson if (getLangOptions().CPlusPlus && !VD->getInit() && 5552928c2107f2e0007f35fe1c224aab63535f1403dAnders Carlsson (VD->getStorageClass() == VarDecl::Extern || 5562928c2107f2e0007f35fe1c224aab63535f1403dAnders Carlsson VD->isExternC(getContext()))) 557b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor return; 558b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor 559b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor // In C, if this isn't a definition, defer code generation. 560b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor if (!getLangOptions().CPlusPlus && !VD->getInit()) 56173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 5624c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 5634c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 56467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 56567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 56673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (MayDeferGeneration(Global)) { 56767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // If the value has already been used, add it directly to the 56867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // DeferredDeclsToEmit list. 5692a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const char *MangledName = getMangledName(GD); 57067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (GlobalDeclMap.count(MangledName)) 5712a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDeclsToEmit.push_back(GD); 57267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner else { 57367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 57467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // first use of the mangled name will cause it to move into 57567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // DeferredDeclsToEmit. 5762a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDecls[MangledName] = GD; 57767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 578bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 579bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 580bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 581bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Otherwise emit the definition. 5822a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitGlobalDefinition(GD); 5834c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 5844c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 585b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 5862a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const ValueDecl *D = GD.getDecl(); 5872a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 5882a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 5892a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitCXXConstructor(CD, GD.getCtorType()); 5907267c1693abe7875b0c57268be05005ae013c6c9Anders Carlsson else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 5917267c1693abe7875b0c57268be05005ae013c6c9Anders Carlsson EmitCXXDestructor(DD, GD.getDtorType()); 592b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner else if (isa<FunctionDecl>(D)) 593b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner EmitGlobalFunctionDefinition(GD); 5942a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 595bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalVarDefinition(VD); 5962a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson else { 597bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(0 && "Invalid argument to EmitGlobalDefinition()"); 598bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 599bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 600bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 60174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 60274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 60374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 60474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 60574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 60674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 60774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 60874391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetOrCreateLLVMFunction(const char *MangledName, 60974391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty, 610b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner GlobalDecl D) { 6110558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 6120558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 6130558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 6140558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 6150558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 6160558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 6170558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 6180558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 6190558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return llvm::ConstantExpr::getBitCast(Entry, PTy); 6200558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 6210558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 62267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 62367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 62467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 6252a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = 6269fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner DeferredDecls.find(MangledName); 62767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 62867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 62967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 63067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 63167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 632b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner } else if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl())) { 6330c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // If this the first reference to a C++ inline function in a class, queue up 6340c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // the deferred function body for emission. These are not seen as 6350c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // top-level declarations. 636b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner if (FD->isThisDeclarationADefinition() && MayDeferGeneration(FD)) 637b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner DeferredDeclsToEmit.push_back(D); 63867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 63967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 6400558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // This function doesn't have a complete type (for example, the return 6410558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // type is an incomplete struct). Use a fake type instead, and make 6420558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // sure not to try to set attributes. 643c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction = false; 6440558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (!isa<llvm::FunctionType>(Ty)) { 6450558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Ty = llvm::FunctionType::get(llvm::Type::VoidTy, 6460558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner std::vector<const llvm::Type*>(), false); 647c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman IsIncompleteFunction = true; 6480558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 6490558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *F = llvm::Function::Create(cast<llvm::FunctionType>(Ty), 6500558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function::ExternalLinkage, 651d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner "", &getModule()); 652d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner F->setName(MangledName); 653c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (D.getDecl()) 654c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman SetFunctionAttributes(cast<FunctionDecl>(D.getDecl()), F, 655c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman IsIncompleteFunction); 6560558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = F; 6570558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return F; 6580558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 6590558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 66074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 66174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 66274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 663b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 66474391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 66574391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 66674391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 667b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner Ty = getTypes().ConvertType(GD.getDecl()->getType()); 668b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(getMangledName(GD.getDecl()), Ty, GD); 66974391b48b4791cded373683a3baf67314f358d50Chris Lattner} 67077ba708819285931932ecd33691a672bb59d221aEli Friedman 67174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 67274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 67374391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 67474391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 67574391b48b4791cded373683a3baf67314f358d50Chris Lattner const char *Name) { 67674391b48b4791cded373683a3baf67314f358d50Chris Lattner // Convert Name to be a uniqued string from the IdentifierInfo table. 67774391b48b4791cded373683a3baf67314f358d50Chris Lattner Name = getContext().Idents.get(Name).getName(); 678b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); 67974391b48b4791cded373683a3baf67314f358d50Chris Lattner} 680bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 68174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 68274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 68374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 68474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 68574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 68674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 68774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 68874391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetOrCreateLLVMGlobal(const char *MangledName, 68974391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::PointerType*Ty, 69074391b48b4791cded373683a3baf67314f358d50Chris Lattner const VarDecl *D) { 6913c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 6925d4f5c724533b994de05df49ae259120482ec366Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 69399b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 69474391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 695570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 696570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner 69799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 69874391b48b4791cded373683a3baf67314f358d50Chris Lattner return llvm::ConstantExpr::getBitCast(Entry, Ty); 69999b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 70067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 70167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 70267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 70367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 7042a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = 70567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.find(MangledName); 70667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 70767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 70867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 70967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 71067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 71167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 71267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 71399b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalVariable *GV = 71474391b48b4791cded373683a3baf67314f358d50Chris Lattner new llvm::GlobalVariable(Ty->getElementType(), false, 71599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 716d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner 0, "", &getModule(), 71756ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 718d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner GV->setName(MangledName); 71949988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 72099b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 72174391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 722f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 723f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 72474391b48b4791cded373683a3baf67314f358d50Chris Lattner GV->setConstant(D->getType().isConstant(Context)); 72549988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 72674391b48b4791cded373683a3baf67314f358d50Chris Lattner // FIXME: Merge with other attribute handling code. 72774391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D->getStorageClass() == VarDecl::PrivateExtern) 72804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 72949988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 73068584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (D->hasAttr<WeakAttr>(getContext()) || 73168584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor D->hasAttr<WeakImportAttr>(getContext())) 73274391b48b4791cded373683a3baf67314f358d50Chris Lattner GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 73356ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 73456ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 73574391b48b4791cded373683a3baf67314f358d50Chris Lattner } 73674391b48b4791cded373683a3baf67314f358d50Chris Lattner 73774391b48b4791cded373683a3baf67314f358d50Chris Lattner return Entry = GV; 73874391b48b4791cded373683a3baf67314f358d50Chris Lattner} 739eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 740eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 74174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 74274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 74374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 74474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 74574391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 74674391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 74774391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 74874391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 74974391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 75074391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 75174391b48b4791cded373683a3baf67314f358d50Chris Lattner 75274391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::PointerType *PTy = 75374391b48b4791cded373683a3baf67314f358d50Chris Lattner llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 75474391b48b4791cded373683a3baf67314f358d50Chris Lattner return GetOrCreateLLVMGlobal(getMangledName(D), PTy, D); 75574391b48b4791cded373683a3baf67314f358d50Chris Lattner} 7563f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 75774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 75874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 75974391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 76074391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 76174391b48b4791cded373683a3baf67314f358d50Chris Lattner const char *Name) { 76274391b48b4791cded373683a3baf67314f358d50Chris Lattner // Convert Name to be a uniqued string from the IdentifierInfo table. 76374391b48b4791cded373683a3baf67314f358d50Chris Lattner Name = getContext().Idents.get(Name).getName(); 76474391b48b4791cded373683a3baf67314f358d50Chris Lattner return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0); 765bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 766bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 76703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 76803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 76903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 7707520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 7717520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 7727520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 7737520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 7747520bd1de12af10ea08c662440565adbdf589317Douglas Gregor const char *MangledName = getMangledName(D); 7757520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (GlobalDeclMap.count(MangledName) == 0) { 7762a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDecls[MangledName] = GlobalDecl(D); 77703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 7787520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 7797520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 7807520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 7817520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 78203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 78303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 78403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 785bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 7868f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 78777ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 788b75863d53b8a2bbf0ece8e6df2b6e5be7f3896c4Chris Lattner 7898f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner if (D->getInit() == 0) { 790cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 79103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 79203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 79303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 79403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 79503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 79603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 79703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 79803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 79903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 80003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar Init = llvm::Constant::getNullValue(getTypes().ConvertTypeForMem(ASTTy)); 80177ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 802e9352cc9818ba59e7cf88500ef048991c90f3821Anders Carlsson Init = EmitConstantExpr(D->getInit(), D->getType()); 8036e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 804232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar ErrorUnsupported(D, "static initializer"); 8056e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman QualType T = D->getInit()->getType(); 8066e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 8076e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 8088f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 8098e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 8102d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 811570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 812570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner 813570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 814570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 815570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 816570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 817570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 8183c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar 819570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 820570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 821570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner 822570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 823570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 824570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 825570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 826570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 827570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 828570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 829570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 830570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 831570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 832570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 833570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { 834570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner 835570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Remove the old entry from GlobalDeclMap so that we'll create a new one. 836570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GlobalDeclMap.erase(getMangledName(D)); 837232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 838570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 839570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 8400558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner GV->takeName(cast<llvm::GlobalValue>(Entry)); 8410558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 84277ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 84377ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::Constant *NewPtrForOldDecl = 844570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 845570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 84677ba708819285931932ecd33691a672bb59d221aEli Friedman 84777ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 848570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 84977ba708819285931932ecd33691a672bb59d221aEli Friedman } 85077ba708819285931932ecd33691a672bb59d221aEli Friedman 85168584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>(getContext())) { 8528bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 8538bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 854f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 8558bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 8568bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 85788a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 858b381aac9bae6d608c72267dd0ed08ec6369e94e4Nuno Lopes GV->setConstant(D->getType().isConstant(Context)); 8590de40af3a3aa14e3854c0eafeabd08f6762801f9Eli Friedman GV->setAlignment(getContext().getDeclAlignInBytes(D)); 86008d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman 86188a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 8628fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner if (D->getStorageClass() == VarDecl::Static) 8638fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 86468584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor else if (D->hasAttr<DLLImportAttr>(getContext())) 865ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLImportLinkage); 86668584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor else if (D->hasAttr<DLLExportAttr>(getContext())) 867ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLExportLinkage); 86868584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor else if (D->hasAttr<WeakAttr>(getContext())) 869286acbdbe0c82e9a6bcad5fca3c4fa582f3f1a2cMike Stump GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 87004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar else if (!CompileOpts.NoCommon && 87104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar (!D->hasExternalStorage() && !D->getInit())) 87204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::CommonLinkage); 8737e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar else 87404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); 8757e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar 8767c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 87704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 878686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta // Emit global variable debug information. 8792d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner if (CGDebugInfo *DI = getDebugInfo()) { 88066031a5594bc9a7dc0dc5137c3e7955f835e4639Daniel Dunbar DI->setLocation(D->getLocation()); 881686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta DI->EmitGlobalVariable(GV, D); 882686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 88388a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 8845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 885bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 886bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 887bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 888bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 889bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 890bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 891bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 892bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 893bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 894bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 895bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 896bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 897bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 898bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 899bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 900bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 901bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 902bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 903bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 904bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner UI != E; ) { 905bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 90608c93a7f2210b464e5abe298a5474b99414615f6Chris Lattner unsigned OpNo = UI.getOperandNo(); 907bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*UI++); 90808c93a7f2210b464e5abe298a5474b99414615f6Chris Lattner if (!CI || OpNo != 0) continue; 909bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 910bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 911bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 912bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 913bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 914bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 915bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 916bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 917bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 918bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 919bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 920bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 921bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 922bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getNumOperands()-1 == ArgNo || 923bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->getOperand(ArgNo+1)->getType() != AI->getType()) { 924bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 925bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 926bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 927bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 928bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 929bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 930bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 931bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 932bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 933bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.append(CI->op_begin()+1, CI->op_begin()+1+ArgNo); 934bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 935bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 936bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 937bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (NewCall->getType() != llvm::Type::VoidTy) 938bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 939bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setCallingConv(CI->getCallingConv()); 940bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 941bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 942bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 943bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!CI->use_empty()) 944bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->replaceAllUsesWith(NewCall); 945bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 946bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 947bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 948bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 949bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 950b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 9512b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson const llvm::FunctionType *Ty; 952b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 953b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner 9542b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { 9552b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson bool isVariadic = D->getType()->getAsFunctionProtoType()->isVariadic(); 9562b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson 9572b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = getTypes().GetFunctionType(getTypes().getFunctionInfo(MD), isVariadic); 9582b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } else { 9592b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = cast<llvm::FunctionType>(getTypes().ConvertType(D->getType())); 9602b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson 9612b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // As a special case, make sure that definitions of K&R function 9622b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // "type foo()" aren't declared as varargs (which forces the backend 9632b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // to do unnecessary work). 9642b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (D->getType()->isFunctionNoProtoType()) { 9652b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson assert(Ty->isVarArg() && "Didn't lower type as expected"); 9662b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // Due to stret, the lowered function could have arguments. 9672b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // Just create the same type as was lowered by ConvertType 9682b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // but strip off the varargs bit. 9692b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson std::vector<const llvm::Type*> Args(Ty->param_begin(), Ty->param_end()); 9702b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = llvm::FunctionType::get(Ty->getReturnType(), Args, false); 9712b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } 972ff75e1db95a53c7606e0bb114cf9adc59ab3d7f6Chris Lattner } 973d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar 9749fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 975b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 97634809507232bc4c3c4840c7d092c7440219fddafChris Lattner 9770558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 9780558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 9790558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 9800558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 9810558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 9820558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 9830558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 9840558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 985bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 986bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 98742745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 988bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 9890558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 99034809507232bc4c3c4840c7d092c7440219fddafChris Lattner 99162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 99262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 99362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 99462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 99562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 99662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 99762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f(int x)"). Start by making a new function of the 99862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // correct type, RAUW, then steal the name. 99934809507232bc4c3c4840c7d092c7440219fddafChris Lattner GlobalDeclMap.erase(getMangledName(D)); 1000b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 1001bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewFn->takeName(OldFn); 1002bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1003bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1004bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1005bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 10069fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1007bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 10089fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 10099fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 101062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 101162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1012bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 1013bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Constant *NewPtrForOldDecl = 1014bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1015bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1016bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 101762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 101862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1019bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 102062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 10210558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1022bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 10230558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 10240558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 1025bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1026219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 10276379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 10287c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 10297c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 1030219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 103168584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>(getContext())) 1032219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 103368584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (const DestructorAttr *DA = D->getAttr<DestructorAttr>(getContext())) 1034219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1035bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1036bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1037bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattnervoid CodeGenModule::EmitAliasDefinition(const ValueDecl *D) { 103868584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor const AliasAttr *AA = D->getAttr<AliasAttr>(getContext()); 1039bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1040bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1041bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1042bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1043bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Unique the name through the identifier table. 1044bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const char *AliaseeName = AA->getAliasee().c_str(); 1045bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner AliaseeName = getContext().Idents.get(AliaseeName).getName(); 1046bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1047bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1048bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1049bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1050bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 1051b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner Aliasee = GetOrCreateLLVMFunction(AliaseeName, DeclTy, GlobalDecl()); 1052bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1053bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Aliasee = GetOrCreateLLVMGlobal(AliaseeName, 1054bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::PointerType::getUnqual(DeclTy), 0); 1055bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1056bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 1057bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::GlobalValue *GA = 1058bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1059bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1060bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 1061bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1062bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // See if there is already something with the alias' name in the module. 1063bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const char *MangledName = getMangledName(D); 1064bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 1065bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1066bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry && !Entry->isDeclaration()) { 1067bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a definition in the module, then it wins over the alias. 1068bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // This is dubious, but allow it to be safe. Just ignore the alias. 1069bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner GA->eraseFromParent(); 1070bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner return; 1071bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 1072bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1073bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1074bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1075bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1076bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1077bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1078bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1079bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1080bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1081bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1082bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1083bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1084bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1085bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 1086bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1087bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Now we know that there is no conflict, set the name. 1088bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry = GA; 1089bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner GA->setName(MangledName); 1090bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 10917c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 10927c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 10937c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 109468584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor if (D->hasAttr<DLLExportAttr>(getContext())) { 10957c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 10967c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 10977297134f128423fce2e88f92421ed135bded7d4eDouglas Gregor if (FD->getBody(getContext())) 10987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 10997c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 11007c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 11017c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 110268584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor } else if (D->hasAttr<WeakAttr>(getContext()) || 110368584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor D->hasAttr<WeakImportAttr>(getContext())) { 11047c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 11057c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 11067c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 11077c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1108bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1109bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1110b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1111b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 1112c136e6cf237711f9f1324637a0b2cdf6ae8e79e4Mike Stumpllvm::Value *CodeGenModule::getBuiltinLibFunction(unsigned BuiltinID) { 11133e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 11143e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 11153e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 1116bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 11173e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 11183e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 11193e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 11203e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 1121bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 1122bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // Get the type for the builtin. 112386df27bbdbb98c39ec2184695c0561209f91beddChris Lattner ASTContext::GetBuiltinTypeError Error; 112486df27bbdbb98c39ec2184695c0561209f91beddChris Lattner QualType Type = Context.GetBuiltinType(BuiltinID, Error); 112586df27bbdbb98c39ec2184695c0561209f91beddChris Lattner assert(Error == ASTContext::GE_None && "Can't get builtin type"); 1126370ab3f1373841d70582feac9e35c3c6b3489f63Douglas Gregor 1127bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner const llvm::FunctionType *Ty = 1128bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner cast<llvm::FunctionType>(getTypes().ConvertType(Type)); 1129bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 1130b808c952bbff821dce727dd801a1098d64394f98Chris Lattner // Unique the name through the identifier table. 1131b808c952bbff821dce727dd801a1098d64394f98Chris Lattner Name = getContext().Idents.get(Name).getName(); 1132bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // FIXME: param attributes for sext/zext etc. 1133b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl()); 1134bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1135bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 11367acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 11377acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 11387acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 11397acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 11407acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1141bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 11425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerllvm::Function *CodeGenModule::getMemCpyFn() { 11435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (MemCpyFn) return MemCpyFn; 11444e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *IntPtr = TheTargetData.getIntPtrType(); 11454e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemCpyFn = getIntrinsic(llvm::Intrinsic::memcpy, &IntPtr, 1); 11465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1147c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 11480c99509927a0c7a48490486b9fec287b63e5c09cEli Friedmanllvm::Function *CodeGenModule::getMemMoveFn() { 11490c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman if (MemMoveFn) return MemMoveFn; 11504e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *IntPtr = TheTargetData.getIntPtrType(); 11514e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemMoveFn = getIntrinsic(llvm::Intrinsic::memmove, &IntPtr, 1); 11520c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman} 11530c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman 115441ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venanciollvm::Function *CodeGenModule::getMemSetFn() { 115541ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio if (MemSetFn) return MemSetFn; 11564e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *IntPtr = TheTargetData.getIntPtrType(); 11574e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemSetFn = getIntrinsic(llvm::Intrinsic::memset, &IntPtr, 1); 115841ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio} 11597acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner 1160e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlssonstatic void appendFieldAndPadding(CodeGenModule &CGM, 1161e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson std::vector<llvm::Constant*>& Fields, 116244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldDecl *FieldD, FieldDecl *NextFieldD, 116344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor llvm::Constant* Field, 11643c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner RecordDecl* RD, const llvm::StructType *STy) { 1165e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson // Append the field. 1166e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson Fields.push_back(Field); 1167e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 116844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor int StructFieldNo = CGM.getTypes().getLLVMFieldNo(FieldD); 1169e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1170e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson int NextStructFieldNo; 117144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (!NextFieldD) { 1172e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson NextStructFieldNo = STy->getNumElements(); 1173e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson } else { 117444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextStructFieldNo = CGM.getTypes().getLLVMFieldNo(NextFieldD); 1175e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson } 1176e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1177e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson // Append padding 1178e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson for (int i = StructFieldNo + 1; i < NextStructFieldNo; i++) { 1179e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson llvm::Constant *C = 1180e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson llvm::Constant::getNullValue(STy->getElementType(StructFieldNo + 1)); 1181e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1182e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson Fields.push_back(C); 1183e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson } 1184e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson} 1185e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1186bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattnerllvm::Constant *CodeGenModule:: 11878d4141f83d9de379547cf05bd75d4c6cf894b189Steve NaroffGetAddrOfConstantCFString(const StringLiteral *Literal) { 1188b59212a6e494d2c364b54462f545833902c29158Steve Naroff std::string str; 1189271474e32f38cc5bd735c1006e499996cbc6e2d1Chris Lattner unsigned StringLength = 0; 1190b59212a6e494d2c364b54462f545833902c29158Steve Naroff 1191e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff bool isUTF16 = false; 1192e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff if (Literal->containsNonAsciiOrNull()) { 1193e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff // Convert from UTF-8 to UTF-16. 1194e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff llvm::SmallVector<UTF16, 128> ToBuf(Literal->getByteLength()); 1195e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff const UTF8 *FromPtr = (UTF8 *)Literal->getStrData(); 1196e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff UTF16 *ToPtr = &ToBuf[0]; 1197e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff 1198e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff ConversionResult Result; 1199e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff Result = ConvertUTF8toUTF16(&FromPtr, FromPtr+Literal->getByteLength(), 1200e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff &ToPtr, ToPtr+Literal->getByteLength(), 1201e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff strictConversion); 1202aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff if (Result == conversionOK) { 1203aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff // FIXME: Storing UTF-16 in a C string is a hack to test Unicode strings 1204aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff // without doing more surgery to this routine. Since we aren't explicitly 1205aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff // checking for endianness here, it's also a bug (when generating code for 1206aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff // a target that doesn't match the host endianness). Modeling this as an 1207aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff // i16 array is likely the cleanest solution. 1208aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff StringLength = ToPtr-&ToBuf[0]; 1209aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff str.assign((char *)&ToBuf[0], StringLength*2);// Twice as many UTF8 chars. 1210aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff isUTF16 = true; 1211aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff } else if (Result == sourceIllegal) { 1212fd942628abfe30e30427875db953222ae99b4325Steve Naroff // FIXME: Have Sema::CheckObjCString() validate the UTF-8 string. 1213aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff str.assign(Literal->getStrData(), Literal->getByteLength()); 1214aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff StringLength = str.length(); 1215aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff } else 1216aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff assert(Result == conversionOK && "UTF-8 to UTF-16 conversion failed"); 1217b59212a6e494d2c364b54462f545833902c29158Steve Naroff 1218b59212a6e494d2c364b54462f545833902c29158Steve Naroff } else { 1219b59212a6e494d2c364b54462f545833902c29158Steve Naroff str.assign(Literal->getStrData(), Literal->getByteLength()); 1220b59212a6e494d2c364b54462f545833902c29158Steve Naroff StringLength = str.length(); 1221e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff } 1222c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson llvm::StringMapEntry<llvm::Constant *> &Entry = 1223c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson CFConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 1224c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 12258e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 12268e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar return C; 1227c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 12283e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zero = llvm::Constant::getNullValue(llvm::Type::Int32Ty); 12293e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 1230c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1231c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1232c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 1233c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = llvm::ArrayType::get(Ty, 0); 12343e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 1235f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This is fairly broken if __CFConstantStringClassReference is 1236f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // already defined, in that it will get renamed and the user will most 1237f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // likely see an opaque error message. This is a general issue with relying 1238f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // on particular names. 12393e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::GlobalVariable *GV = 1240c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson new llvm::GlobalVariable(Ty, false, 1241c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson llvm::GlobalVariable::ExternalLinkage, 0, 1242c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson "__CFConstantStringClassReference", 1243c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson &getModule()); 12443e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 12453e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 12463e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 12473e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1248c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 1249c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1250e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 1251e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson RecordDecl *CFRD = CFTy->getAsRecordType()->getDecl(); 12523e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 1253e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson const llvm::StructType *STy = 1254e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1255e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1256e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson std::vector<llvm::Constant*> Fields; 12576ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor RecordDecl::field_iterator Field = CFRD->field_begin(getContext()); 125844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1259c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 126044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldDecl *CurField = *Field++; 126144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldDecl *NextField = *Field++; 126244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 126344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CFConstantStringClassRef, CFRD, STy); 1264c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1265c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 126644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CurField = NextField; 126744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextField = *Field++; 12683e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 126944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 1270e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) 1271e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff : llvm::ConstantInt::get(Ty, 0x07C8), 1272e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff CFRD, STy); 1273c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1274c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 127544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CurField = NextField; 127644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextField = *Field++; 12773e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *C = llvm::ConstantArray::get(str); 1278a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 1279a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar const char *Sect, *Prefix; 1280a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar bool isConstant; 1281a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1282a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Prefix = getContext().Target.getUnicodeStringSymbolPrefix(); 1283a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Sect = getContext().Target.getUnicodeStringSection(); 1284a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar // FIXME: Why does GCC not set constant here? 1285a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar isConstant = false; 1286a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 1287a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Prefix = getContext().Target.getStringSymbolPrefix(true); 1288a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Sect = getContext().Target.getCFStringDataSection(); 1289a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar // FIXME: -fwritable-strings should probably affect this, but we 1290a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar // are following gcc here. 1291a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar isConstant = true; 1292a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 12938e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar llvm::GlobalVariable *GV = 1294a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar new llvm::GlobalVariable(C->getType(), isConstant, 12958e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar llvm::GlobalValue::InternalLinkage, 1296a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar C, Prefix, &getModule()); 1297a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (Sect) 12988e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 1299a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1300a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar unsigned Align = getContext().getTypeAlign(getContext().ShortTy)/8; 1301a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar GV->setAlignment(Align); 1302a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 130344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 13048e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2), 1305e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson CFRD, STy); 1306c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1307c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 130844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CurField = NextField; 130944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextField = 0; 1310c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 131144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 1312b59212a6e494d2c364b54462f545833902c29158Steve Naroff llvm::ConstantInt::get(Ty, StringLength), CFRD, STy); 1313c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1314c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 1315e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson C = llvm::ConstantStruct::get(STy, Fields); 13168e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV = new llvm::GlobalVariable(C->getType(), true, 13178e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar llvm::GlobalVariable::InternalLinkage, C, 13188e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar getContext().Target.getCFStringSymbolPrefix(), 13198e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar &getModule()); 13208e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 13218e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 13220c67829763b98bc670062b553897a851fab17401Anders Carlsson Entry.setValue(GV); 13233e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 13240c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1325c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 132645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 13276143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 13281e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 13296143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 13301e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const char *StrData = E->getStrData(); 13311e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar unsigned Len = E->getByteLength(); 13321e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 13331e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 13341e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar getContext().getAsConstantArrayType(E->getType()); 13351e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 13361e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 1337dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 13381e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar std::string Str(StrData, StrData+Len); 13391e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 1340dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner 1341dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 1342dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner RealLen *= getContext().Target.getWCharWidth()/8; 1343dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner 13441e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 13451e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 13461e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 13471e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 13481e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 13496143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 13506143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 13516143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 13526143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 13536143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 13546143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar return GetAddrOfConstantString(GetStringForStringLiteral(S)); 13556143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 13566143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1357eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1358eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1359eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1360eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1361eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1362eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1363a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1364a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1365eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1366eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1367eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1368a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 136945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattnerstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 137045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 13715fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 13725fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 13736143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 13746143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar llvm::Constant *C = llvm::ConstantArray::get(str, false); 137545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 137645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 1377eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return new llvm::GlobalVariable(C->getType(), constant, 1378eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner llvm::GlobalValue::InternalLinkage, 13798e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar C, GlobalName, &CGM.getModule()); 138045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 138145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 13826143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 13836143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 13846143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 13856143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 13866143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 13876143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 13886143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 13896143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 13905fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, 13915fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 13928e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 13938e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 13948e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 13958e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 13968e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GlobalName = getContext().Target.getStringSymbolPrefix(IsConstant); 13978e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 13988e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 13998e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 14005fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar return GenerateStringLiteral(str, false, *this, GlobalName); 140145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 140245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner llvm::StringMapEntry<llvm::Constant *> &Entry = 140345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 140445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 140545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1406eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 140745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 140845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 14095fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); 141045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 141145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 141245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 14136143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 14146143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 14156143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 14166143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 14175fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, 14185fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 1419c9f29c61856ffb5f643cedbe87ac076f21a1381aChris Lattner return GetAddrOfConstantString(str + '\0', GlobalName); 14206143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 142141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1422af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1423af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 1424af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbarvoid CodeGenModule::EmitObjCPropertyImplementations(const 1425af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 1426653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor for (ObjCImplementationDecl::propimpl_iterator 1427653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor i = D->propimpl_begin(getContext()), 1428653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor e = D->propimpl_end(getContext()); i != e; ++i) { 1429af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 1430af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1431af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1432af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1433af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1434af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1435af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1436af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1437af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1438af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1439af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 1440653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor if (!D->getInstanceMethod(getContext(), PD->getGetterName())) 1441fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1442fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1443af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 1444653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor !D->getInstanceMethod(getContext(), PD->getSetterName())) 1445fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1446fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1447af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1448af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1449af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1450af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 145191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 1452984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 14536ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor for (RecordDecl::decl_iterator I = ND->decls_begin(getContext()), 14546ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor E = ND->decls_end(getContext()); 1455984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 1456984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 1457984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 1458984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 145991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 146091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 146191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson if (LSD->getLanguage() != LinkageSpecDecl::lang_c) { 146291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 146391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 146491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 146591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 14666ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor for (RecordDecl::decl_iterator I = LSD->decls_begin(getContext()), 14676ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor E = LSD->decls_end(getContext()); 146891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 146991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 147091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 147191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 147241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 147341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 147441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 147541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 147641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 147741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 147841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 147941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 148016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 148116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 148216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 148316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor 148441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 14852b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 148641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 148716e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 148816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 148916e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 149016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor 149116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Fall through 149216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor 149341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 14942a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitGlobal(GlobalDecl(cast<ValueDecl>(D))); 149541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 149641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 149795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 149841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 1499984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 150041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 15019cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 15029cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 15039cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 150495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 150595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 150695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 150727ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 150827ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 150927ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 151036674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 151136674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 151236674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 151336674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 151436674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 151595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 151641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 151738e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 151841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 151941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 1520b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCCategory: 1521b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 152241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1523285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 152441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 1525b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 152641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 152741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 152841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 1529af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 1530af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 153141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 153241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 153341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1534af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 1535af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 1536af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 1537af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 153841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1539af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 154041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 154141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 154241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 15437297134f128423fce2e88f92421ed135bded7d4eDouglas Gregor if (OMD->getBody(getContext())) 154441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 154541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 154641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 154741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCompatibleAlias: 1548305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 154941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 155041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 155191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 155291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 155341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 155441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 155541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 155641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 155741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar std::string AsmString(AD->getAsmString()->getStrData(), 155841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar AD->getAsmString()->getByteLength()); 155941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 156041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 156141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 156241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 156341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 156441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(S + '\n' + AsmString); 156541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 156641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 156741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 156841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar default: 1569f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 1570f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 1571f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 157241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 157341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 157441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 1575