CodeGenModule.cpp revision b4880bab7fc1b61267cfd9a0ad52188e7a828cb3
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" 242c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner#include "clang/Basic/Diagnostic.h" 258bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman#include "clang/Basic/SourceManager.h" 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 27e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff#include "clang/Basic/ConvertUTF.h" 28ec9426ca6039279bcc99bc2c625bb2abe4f0353dNate Begeman#include "llvm/CallingConv.h" 29bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner#include "llvm/Module.h" 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/Intrinsics.h" 3120ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 36bd3606426d389370616126af969904ec493cb105Chris LattnerCodeGenModule::CodeGenModule(ASTContext &C, const CompileOptions &compileOpts, 37fb97b03e42d397405f617be0252be83e77a66f6eChris Lattner llvm::Module &M, const llvm::TargetData &TD, 38bd3606426d389370616126af969904ec493cb105Chris Lattner Diagnostic &diags) 39bd3606426d389370616126af969904ec493cb105Chris Lattner : BlockModule(C, M, TD, Types, *this), Context(C), 40bd3606426d389370616126af969904ec493cb105Chris Lattner Features(C.getLangOptions()), CompileOpts(compileOpts), TheModule(M), 412a998148a6823c44d67da347c95eb2ea21f6b986Mike Stump TheTargetData(TD), Diags(diags), Types(C, M, TD), Runtime(0), 422a998148a6823c44d67da347c95eb2ea21f6b986Mike Stump MemCpyFn(0), MemMoveFn(0), MemSetFn(0), CFConstantStringClassRef(0) { 43208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar 443c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner if (!Features.ObjC1) 453c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = 0; 463c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (!Features.NeXTRuntime) 473c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateGNUObjCRuntime(*this); 483c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (Features.ObjCNonFragileABI) 493c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacNonFragileABIObjCRuntime(*this); 503c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else 513c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacObjCRuntime(*this); 52e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 53e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 54bd3606426d389370616126af969904ec493cb105Chris Lattner DebugInfo = CompileOpts.DebugInfo ? new CGDebugInfo(this) : 0; 552b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 562b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 572b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 58815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 59815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 60815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 61815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 62815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 6382227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 64208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 65208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 66208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 676bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 686bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 69532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 700269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 71f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 72f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 73488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 742c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 7590df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 7690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 7790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 7890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 79488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 8056b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 812c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 820a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 830a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 842c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 8558c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 86488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 87c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 8890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 8990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 9090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 9190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 92488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 9356b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 94c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 950a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 96c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 97c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 9804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel DunbarLangOptions::VisibilityMode 9904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel DunbarCodeGenModule::getDeclVisibilityMode(const Decl *D) const { 10004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 10104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (VD->getStorageClass() == VarDecl::PrivateExtern) 10204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 10304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 10404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) { 10504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (attr->getVisibility()) { 10604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar default: assert(0 && "Unknown visibility!"); 10704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::DefaultVisibility: 10804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Default; 10904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::HiddenVisibility: 11004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 11104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::ProtectedVisibility: 11204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Protected; 11304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar } 1147e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1156ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 11604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return getLangOptions().getVisibilityMode(); 1174f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman} 1184f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman 11904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbarvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 12004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar const Decl *D) const { 12104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 122df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 1237e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 1246ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 1257e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1266ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 12704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (getDeclVisibilityMode(D)) { 1287cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian default: assert(0 && "Unknown visibility!"); 12904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Default: 13004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 13104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Hidden: 13204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 13304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Protected: 13404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); 1357cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian } 1367cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 1377cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 1382a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlssonconst char *CodeGenModule::getMangledName(const GlobalDecl &GD) { 1392a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const NamedDecl *ND = GD.getDecl(); 1402a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 1412a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 1422a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledCXXCtorName(D, GD.getCtorType()); 1432a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 1442a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledCXXDtorName(D, GD.getDtorType()); 1452a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 1462a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledName(ND); 1472a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson} 1482a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 1495f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// \brief Retrieves the mangled name for the given declaration. 1505f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1515f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// If the given declaration requires a mangled name, returns an 152c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// const char* containing the mangled name. Otherwise, returns 153c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// the unmangled name. 1545f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1556ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregorconst char *CodeGenModule::getMangledName(const NamedDecl *ND) { 156c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner // In C, functions with no attributes never need to be mangled. Fastpath them. 157c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner if (!getLangOptions().CPlusPlus && !ND->hasAttrs()) { 158c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); 1593c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return ND->getNameAsCString(); 160c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner } 161c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner 1626ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor llvm::SmallString<256> Name; 1636ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor llvm::raw_svector_ostream Out(Name); 164fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar if (!mangleName(ND, Context, Out)) { 165fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); 1663c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return ND->getNameAsCString(); 167fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar } 1685f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 1696ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor Name += '\0'; 17095d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson return UniqueMangledName(Name.begin(), Name.end()); 17195d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson} 17295d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson 17395d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlssonconst char *CodeGenModule::UniqueMangledName(const char *NameStart, 17495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson const char *NameEnd) { 17595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson assert(*(NameEnd - 1) == '\0' && "Mangled name must be null terminated!"); 17695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson 17795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson return MangledNames.GetOrCreateValue(NameStart, NameEnd).getKeyData(); 1785f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 1795f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 1806d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 1816d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 1826bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 18349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 1846bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 1856d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 1866d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 1876bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 1886bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 1896bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 19049988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 1916bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 1926bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 1936bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 1946bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 1956bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 1966bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 1976bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType::get(llvm::Type::VoidTy, 1986bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<const llvm::Type*>(), 1996bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar false); 2006bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 2016bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2026bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 203572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::StructType* CtorStructTy = 2046bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::StructType::get(llvm::Type::Int32Ty, 2056bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::PointerType::getUnqual(CtorFTy), NULL); 2066bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2076bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 2086bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 2096bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 2106bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 2116bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar S.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, I->second, false)); 2126bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 2136bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 2146bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 2156bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2166bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 2176bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 2186bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar new llvm::GlobalVariable(AT, false, 219572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 2206bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::ConstantArray::get(AT, Ctors), 2216bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalName, 222572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner &TheModule); 2236d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 2246d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 2256d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 226532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 227532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 228532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 229532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 230532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 231532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 232532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 233532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 234532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 235532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::GlobalValue *gv = 236532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman new llvm::GlobalVariable(Array->getType(), false, 237532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::GlobalValue::AppendingLinkage, Array, 238532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman "llvm.global.annotations", &TheModule); 239532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 240532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 241532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 24286daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattnerstatic CodeGenModule::GVALinkage 24386daeee2d4aa6523679f07f27a826bf4c42ca95dChris LattnerGetLinkageForFunction(const FunctionDecl *FD, const LangOptions &Features) { 24443907e87c776391d7d96da04b48e7bf06d8baafcEli Friedman // "static" functions get internal linkage. 2455e222139610a9f8b2b5f4ddd112f10dec9ec1e97Eli Friedman if (FD->getStorageClass() == FunctionDecl::Static) 2467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar return CodeGenModule::GVA_Internal; 2477c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 248005eedce54da6580de37bb115bf581008637e4b1Chris Lattner if (!FD->isInline()) 249cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner return CodeGenModule::GVA_StrongExternal; 25086daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner 251d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner // If the inline function explicitly has the GNU inline attribute on it, or if 252d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner // this is C89 mode, we use to GNU semantics. 2539f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor if (!Features.C99 && !Features.CPlusPlus) { 254d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner // extern inline in GNU mode is like C99 inline. 2559f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor if (FD->getStorageClass() == FunctionDecl::Extern) 2569f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor return CodeGenModule::GVA_C99Inline; 2579f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor // Normal inline is a strong symbol. 2589f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor return CodeGenModule::GVA_StrongExternal; 2599f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor } else if (FD->hasActiveGNUInlineAttribute()) { 2609f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor // GCC in C99 mode seems to use a different decision-making 2619f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor // process for extern inline, which factors in previous 2629f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor // declarations. 2639f9bf258f8ebae30bfb70feb9d797d6eb67b0460Douglas Gregor if (FD->isExternGNUInline()) 264d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner return CodeGenModule::GVA_C99Inline; 265d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner // Normal inline is a strong symbol. 266cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner return CodeGenModule::GVA_StrongExternal; 267d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner } 268cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner 26986daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // The definition of inline changes based on the language. Note that we 27086daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // have already handled "static inline" above, with the GVA_Internal case. 271cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner if (Features.CPlusPlus) // inline and extern inline. 27286daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner return CodeGenModule::GVA_CXXInline; 27386daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner 274d55a71d852d4d8b785122b8d033a0c06b187067bChris Lattner assert(Features.C99 && "Must be in C99 mode if not in C89 or C++ mode"); 275b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor if (FD->isC99InlineDefinition()) 276b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor return CodeGenModule::GVA_C99Inline; 277b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor 278b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor return CodeGenModule::GVA_StrongExternal; 2797c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 2807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 2817c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar/// SetFunctionDefinitionAttributes - Set attributes for a global. 282b97b69244a4e7916c7b8fca28fa21b36ce5b30b2Daniel Dunbar/// 283b97b69244a4e7916c7b8fca28fa21b36ce5b30b2Daniel Dunbar/// FIXME: This is currently only done for aliases and functions, but 284b97b69244a4e7916c7b8fca28fa21b36ce5b30b2Daniel Dunbar/// not for variables (these details are set in 285b97b69244a4e7916c7b8fca28fa21b36ce5b30b2Daniel Dunbar/// EmitGlobalVarDefinition for variables). 2867c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 2877c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 28886daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner GVALinkage Linkage = GetLinkageForFunction(D, Features); 2897c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 29055d6f50b23a1fd0a04b568787a25beb7537e6c9bDaniel Dunbar if (Linkage == GVA_Internal) { 2919f9427999cf69b3b89cd0ed3be16ed27a1c282c7Chris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 2929f9427999cf69b3b89cd0ed3be16ed27a1c282c7Chris Lattner } else if (D->hasAttr<DLLExportAttr>()) { 2937c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setLinkage(llvm::Function::DLLExportLinkage); 29444b0bc008ee11cdee69ad12210ca7550e4fa426aChris Lattner } else if (D->hasAttr<WeakAttr>() || D->hasAttr<WeakImportAttr>()) { 29544b0bc008ee11cdee69ad12210ca7550e4fa426aChris Lattner GV->setLinkage(llvm::Function::WeakAnyLinkage); 296cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner } else if (Linkage == GVA_C99Inline) { 297cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 298cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // definition somewhere else, so we can use available_externally linkage. 299d9d049a93c55624908e81cf3927b7905efeba05fChris Lattner GV->setLinkage(llvm::Function::AvailableExternallyLinkage); 30086daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner } else if (Linkage == GVA_CXXInline) { 30186daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // In C++, the compiler has to emit a definition in every translation unit 30286daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // that references the function. We should use linkonce_odr because 30386daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // a) if all references in this translation unit are optimized away, we 30486daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 30586daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 30686daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // definition is dependable. 30786daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner GV->setLinkage(llvm::Function::LinkOnceODRLinkage); 3087c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 309cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner assert(Linkage == GVA_StrongExternal); 310cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // Otherwise, we have strong external linkage. 3117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setLinkage(llvm::Function::ExternalLinkage); 3120dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar } 313d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 3147c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 315d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 316d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 3177dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 3187dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar const CGFunctionInfo &Info, 3197dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 320761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 32188b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbar ConstructAttributeList(Info, D, AttributeList); 322c134fcb0d7989fe6937e47e6216637647e074aefEli Friedman 323761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 324761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeList.size())); 325ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman 326ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman // Set the appropriate calling convention for the Function. 327b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar if (D->hasAttr<FastCallAttr>()) 328f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov F->setCallingConv(llvm::CallingConv::X86_FastCall); 329f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov 330b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar if (D->hasAttr<StdCallAttr>()) 331f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov F->setCallingConv(llvm::CallingConv::X86_StdCall); 332f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 333f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3347c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 3357c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 33674ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 337f93349f3ec4d69eafba42436c33aaa91bfca7e70Daniel Dunbar F->addFnAttr(llvm::Attribute::NoUnwind); 338af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 339b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar if (D->hasAttr<AlwaysInlineAttr>()) 340af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 34181ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson 342b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar if (D->hasAttr<NoinlineAttr>()) 34381ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 344f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 345f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetCommonAttributes(const Decl *D, 3477c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 3487c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar setGlobalVisibility(GV, D); 3497c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3507c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (D->hasAttr<UsedAttr>()) 3517c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 3527c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3537c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 3547c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 3557c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 3567c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3570e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 3580e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 3590e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 3600e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 3610e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 3627c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3637c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 3647c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3650e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 366f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 367f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 368f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbarvoid CodeGenModule::SetFunctionAttributes(const FunctionDecl *FD, 369f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar llvm::Function *F) { 3707dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(FD), F); 37145c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 3727c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 3737c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 3747c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3757c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (FD->hasAttr<DLLImportAttr>()) { 3767c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 3777c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else if (FD->hasAttr<WeakAttr>() || FD->hasAttr<WeakImportAttr>()) { 3787c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 3797c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // separate linkage types for this. 3807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 3817c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 3827c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalLinkage); 3837c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 3847c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3857c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 3867c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 387219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 388219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 3890269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 3900269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar assert(!GV->isDeclaration() && 3910269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 39235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 3930269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 3940269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 3950269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 3960269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 3970269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar if (LLVMUsed.empty()) 3980269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 3990269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 40035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner llvm::Type *i8PTy = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 40135f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, LLVMUsed.size()); 40235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner 40335f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 40435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 40535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 40635f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 40735f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray[i] = 40835f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), i8PTy); 40935f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 41035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner 4110269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalVariable *GV = 4120269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar new llvm::GlobalVariable(ATy, false, 4130269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 41435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner llvm::ConstantArray::get(ATy, UsedArray), 4150269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "llvm.used", &getModule()); 4160269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4170269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 4180269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 4190269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4200269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 42167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 42267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 42367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 42467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner while (!DeferredDeclsToEmit.empty()) { 4252a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 42667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 42767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 42867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // The mangled name for the decl must have been emitted in GlobalDeclMap. 42967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Look it up to see if it was defined with a stronger definition (e.g. an 43067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // extern inline function with a strong function redefinition). If so, 43167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // just ignore the deferred decl. 43267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner llvm::GlobalValue *CGRef = GlobalDeclMap[getMangledName(D)]; 43367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 434b723f7520bcce5f13ccaae557c16a1e7133b6908Anders Carlsson 43567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 43667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 43767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 43867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 43967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 44067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 4415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4438bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 4448bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 4458bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 4463c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar/// GlobalValue being annotated. The second field is the constant string 4478bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// created from the AnnotateAttr's annotation. The third field is a constant 4488bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 4498bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 4508bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4518bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 4528bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 4538bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4548bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begemanllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 4558bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 4568bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 4578bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 4588bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 4598bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 4608bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 4618bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const llvm::Type *SBP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 4628bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *anno = llvm::ConstantArray::get(AA->getAnnotation(), true); 4638bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *unit = llvm::ConstantArray::get(M->getModuleIdentifier(), 4648bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 4658bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 4668bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 4678bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 4688e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar const char *StringPrefix = getContext().Target.getStringSymbolPrefix(true); 4698bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *annoGV = 4708bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman new llvm::GlobalVariable(anno->getType(), false, 4718bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue::InternalLinkage, anno, 4728e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->getName() + StringPrefix, M); 4738bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 4748bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 4758bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman new llvm::GlobalVariable(unit->getType(), false, 4768e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar llvm::GlobalValue::InternalLinkage, unit, 4778e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar StringPrefix, M); 4788bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 47957d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 4808bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 4818bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantExpr::getBitCast(GV, SBP), 4828bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantExpr::getBitCast(annoGV, SBP), 4838bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantExpr::getBitCast(unitGV, SBP), 4848bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantInt::get(llvm::Type::Int32Ty, LineNo) 4858bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 4868bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman return llvm::ConstantStruct::get(Fields, 4, false); 4878bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 4888bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 48973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbarbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 4905c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // Never defer when EmitAllDecls is specified or the decl has 4915c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // attribute used. 492b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar if (Features.EmitAllDecls || Global->hasAttr<UsedAttr>()) 49373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 494bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 495bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 49673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Constructors and destructors should never be deferred. 497b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 49873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 49973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 50086daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner GVALinkage Linkage = GetLinkageForFunction(FD, Features); 501dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner 502dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner // static, static inline, always_inline, and extern inline functions can 50386daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // always be deferred. Normal inline functions can be deferred in C99/C++. 504cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 505cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner Linkage == GVA_CXXInline) 506dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return true; 507dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return false; 50873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar } 509dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner 510dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner const VarDecl *VD = cast<VarDecl>(Global); 511dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner assert(VD->isFileVarDecl() && "Invalid decl"); 512b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor 513dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return VD->getStorageClass() == VarDecl::Static; 51473241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 51573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 516b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 5172a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const ValueDecl *Global = GD.getDecl(); 5182a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 519bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 520bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 521b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar if (Global->hasAttr<AliasAttr>()) 522bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner return EmitAliasDefinition(Global); 523219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 52467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 5255e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 52673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 52773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 52873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 5290269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 5300269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 531bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 532bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 533b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor // In C++, if this is marked "extern", defer code generation. 534b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor if (getLangOptions().CPlusPlus && 535b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor VD->getStorageClass() == VarDecl::Extern && !VD->getInit()) 536b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor return; 537b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor 538b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor // In C, if this isn't a definition, defer code generation. 539b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor if (!getLangOptions().CPlusPlus && !VD->getInit()) 54073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 5414c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 5424c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 54367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 54467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 54573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (MayDeferGeneration(Global)) { 54667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // If the value has already been used, add it directly to the 54767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // DeferredDeclsToEmit list. 5482a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const char *MangledName = getMangledName(GD); 54967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (GlobalDeclMap.count(MangledName)) 5502a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDeclsToEmit.push_back(GD); 55167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner else { 55267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 55367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // first use of the mangled name will cause it to move into 55467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // DeferredDeclsToEmit. 5552a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDecls[MangledName] = GD; 55667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 557bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 558bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 559bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 560bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Otherwise emit the definition. 5612a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitGlobalDefinition(GD); 5624c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 5634c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 564b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 5652a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const ValueDecl *D = GD.getDecl(); 5662a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 5672a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 5682a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitCXXConstructor(CD, GD.getCtorType()); 569b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner else if (isa<FunctionDecl>(D)) 570b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner EmitGlobalFunctionDefinition(GD); 5712a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 572bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalVarDefinition(VD); 5732a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson else { 574bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(0 && "Invalid argument to EmitGlobalDefinition()"); 575bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 576bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 577bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 57874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 57974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 58074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 58174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 58274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 58374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 58474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 58574391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetOrCreateLLVMFunction(const char *MangledName, 58674391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty, 587b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner GlobalDecl D) { 5880558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 5890558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 5900558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 5910558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 5920558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 5930558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 5940558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 5950558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 5960558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return llvm::ConstantExpr::getBitCast(Entry, PTy); 5970558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 5980558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 59967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 60067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 60167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 6022a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = 6039fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner DeferredDecls.find(MangledName); 60467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 60567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 60667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 60767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 60867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 609b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner } else if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl())) { 6100c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // If this the first reference to a C++ inline function in a class, queue up 6110c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // the deferred function body for emission. These are not seen as 6120c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // top-level declarations. 613b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner if (FD->isThisDeclarationADefinition() && MayDeferGeneration(FD)) 614b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner DeferredDeclsToEmit.push_back(D); 61567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 61667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 6170558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // This function doesn't have a complete type (for example, the return 6180558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // type is an incomplete struct). Use a fake type instead, and make 6190558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // sure not to try to set attributes. 6200558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner bool ShouldSetAttributes = true; 6210558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (!isa<llvm::FunctionType>(Ty)) { 6220558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Ty = llvm::FunctionType::get(llvm::Type::VoidTy, 6230558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner std::vector<const llvm::Type*>(), false); 6240558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner ShouldSetAttributes = false; 6250558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 6260558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *F = llvm::Function::Create(cast<llvm::FunctionType>(Ty), 6270558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function::ExternalLinkage, 628d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner "", &getModule()); 629d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner F->setName(MangledName); 630b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner if (D.getDecl() && ShouldSetAttributes) 631b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner SetFunctionAttributes(cast<FunctionDecl>(D.getDecl()), F); 6320558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = F; 6330558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return F; 6340558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 6350558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 63674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 63774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 63874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 639b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 64074391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 64174391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 64274391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 643b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner Ty = getTypes().ConvertType(GD.getDecl()->getType()); 644b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(getMangledName(GD.getDecl()), Ty, GD); 64574391b48b4791cded373683a3baf67314f358d50Chris Lattner} 64677ba708819285931932ecd33691a672bb59d221aEli Friedman 64774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 64874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 64974391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 65074391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 65174391b48b4791cded373683a3baf67314f358d50Chris Lattner const char *Name) { 65274391b48b4791cded373683a3baf67314f358d50Chris Lattner // Convert Name to be a uniqued string from the IdentifierInfo table. 65374391b48b4791cded373683a3baf67314f358d50Chris Lattner Name = getContext().Idents.get(Name).getName(); 654b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); 65574391b48b4791cded373683a3baf67314f358d50Chris Lattner} 656bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 65774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 65874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 65974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 66074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 66174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 66274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 66374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 66474391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetOrCreateLLVMGlobal(const char *MangledName, 66574391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::PointerType*Ty, 66674391b48b4791cded373683a3baf67314f358d50Chris Lattner const VarDecl *D) { 6673c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 6685d4f5c724533b994de05df49ae259120482ec366Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 66999b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 67074391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 671570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 672570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner 67399b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 67474391b48b4791cded373683a3baf67314f358d50Chris Lattner return llvm::ConstantExpr::getBitCast(Entry, Ty); 67599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 67667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 67767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 67867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 67967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 6802a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = 68167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.find(MangledName); 68267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 68367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 68467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 68567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 68667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 68767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 68867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 68999b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalVariable *GV = 69074391b48b4791cded373683a3baf67314f358d50Chris Lattner new llvm::GlobalVariable(Ty->getElementType(), false, 69199b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 692d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner 0, "", &getModule(), 69356ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 694d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner GV->setName(MangledName); 69549988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 69699b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 69774391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 69874391b48b4791cded373683a3baf67314f358d50Chris Lattner // FIXME: This code is overly simple and should be merged with 69974391b48b4791cded373683a3baf67314f358d50Chris Lattner // other global handling. 70074391b48b4791cded373683a3baf67314f358d50Chris Lattner GV->setConstant(D->getType().isConstant(Context)); 70149988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 70274391b48b4791cded373683a3baf67314f358d50Chris Lattner // FIXME: Merge with other attribute handling code. 70374391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D->getStorageClass() == VarDecl::PrivateExtern) 70404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 70549988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 706b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar if (D->hasAttr<WeakAttr>() || D->hasAttr<WeakImportAttr>()) 70774391b48b4791cded373683a3baf67314f358d50Chris Lattner GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 70856ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 70956ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 71074391b48b4791cded373683a3baf67314f358d50Chris Lattner } 71174391b48b4791cded373683a3baf67314f358d50Chris Lattner 71274391b48b4791cded373683a3baf67314f358d50Chris Lattner return Entry = GV; 71374391b48b4791cded373683a3baf67314f358d50Chris Lattner} 714eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 715eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 71674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 71774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 71874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 71974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 72074391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 72174391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 72274391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 72374391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 72474391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 72574391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 72674391b48b4791cded373683a3baf67314f358d50Chris Lattner 72774391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::PointerType *PTy = 72874391b48b4791cded373683a3baf67314f358d50Chris Lattner llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 72974391b48b4791cded373683a3baf67314f358d50Chris Lattner return GetOrCreateLLVMGlobal(getMangledName(D), PTy, D); 73074391b48b4791cded373683a3baf67314f358d50Chris Lattner} 7313f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 73274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 73374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 73474391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 73574391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 73674391b48b4791cded373683a3baf67314f358d50Chris Lattner const char *Name) { 73774391b48b4791cded373683a3baf67314f358d50Chris Lattner // Convert Name to be a uniqued string from the IdentifierInfo table. 73874391b48b4791cded373683a3baf67314f358d50Chris Lattner Name = getContext().Idents.get(Name).getName(); 73974391b48b4791cded373683a3baf67314f358d50Chris Lattner return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0); 740bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 741bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 74203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 74303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 74403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 7457520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 7467520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 7477520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 7487520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 7497520bd1de12af10ea08c662440565adbdf589317Douglas Gregor const char *MangledName = getMangledName(D); 7507520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (GlobalDeclMap.count(MangledName) == 0) { 7512a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDecls[MangledName] = GlobalDecl(D); 75203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 7537520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 7547520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 7557520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 7567520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 75703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 75803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 75903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 760bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 7618f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 76277ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 763b75863d53b8a2bbf0ece8e6df2b6e5be7f3896c4Chris Lattner 7648f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner if (D->getInit() == 0) { 765cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 76603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 76703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 76803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 76903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 77003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 77103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 77203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 77303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 77403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 77503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar Init = llvm::Constant::getNullValue(getTypes().ConvertTypeForMem(ASTTy)); 77677ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 777e9352cc9818ba59e7cf88500ef048991c90f3821Anders Carlsson Init = EmitConstantExpr(D->getInit(), D->getType()); 7786e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 779232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar ErrorUnsupported(D, "static initializer"); 7806e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman QualType T = D->getInit()->getType(); 7816e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 7826e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 7838f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 7848e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 7852d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 786570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 787570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner 788570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 789570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 790570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 791570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 792570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 7933c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar 794570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 795570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 796570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner 797570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 798570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 799570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 800570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 801570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 802570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 803570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 804570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 805570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 806570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 807570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 808570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { 809570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner 810570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Remove the old entry from GlobalDeclMap so that we'll create a new one. 811570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GlobalDeclMap.erase(getMangledName(D)); 812232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 813570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 814570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 8150558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner GV->takeName(cast<llvm::GlobalValue>(Entry)); 8160558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 81777ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 81877ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::Constant *NewPtrForOldDecl = 819570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 820570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 82177ba708819285931932ecd33691a672bb59d221aEli Friedman 82277ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 823570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 82477ba708819285931932ecd33691a672bb59d221aEli Friedman } 82577ba708819285931932ecd33691a672bb59d221aEli Friedman 8268bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 8278bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 8288bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 829f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 8308bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 8318bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 83288a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 833b381aac9bae6d608c72267dd0ed08ec6369e94e4Nuno Lopes GV->setConstant(D->getType().isConstant(Context)); 8340de40af3a3aa14e3854c0eafeabd08f6762801f9Eli Friedman GV->setAlignment(getContext().getDeclAlignInBytes(D)); 83508d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman 83688a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 8378fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner if (D->getStorageClass() == VarDecl::Static) 8388fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 839b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar else if (D->hasAttr<DLLImportAttr>()) 840ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLImportLinkage); 841b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar else if (D->hasAttr<DLLExportAttr>()) 842ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLExportLinkage); 843b11fa0d25d86169f0e0a29d5398116c0212bb787Daniel Dunbar else if (D->hasAttr<WeakAttr>() || D->hasAttr<WeakImportAttr>()) 844286acbdbe0c82e9a6bcad5fca3c4fa582f3f1a2cMike Stump GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 84504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar else if (!CompileOpts.NoCommon && 84604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar (!D->hasExternalStorage() && !D->getInit())) 84704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::CommonLinkage); 8487e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar else 84904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); 8507e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar 8517c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 85204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 853686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta // Emit global variable debug information. 8542d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner if (CGDebugInfo *DI = getDebugInfo()) { 85566031a5594bc9a7dc0dc5137c3e7955f835e4639Daniel Dunbar DI->setLocation(D->getLocation()); 856686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta DI->EmitGlobalVariable(GV, D); 857686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 85888a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 8595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 860bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 861bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 862bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 863bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 864bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 865bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 866bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 867bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 868bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 869bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 870bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 871bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 872bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 873bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 874bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 875bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 876bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 877bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 878bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 879bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner UI != E; ) { 880bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 881bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*UI++); 882bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!CI) continue; 883bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 884bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 885bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 886bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 887bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 888bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 889bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 890bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 891bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 892bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 893bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 894bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 895bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 896bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getNumOperands()-1 == ArgNo || 897bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->getOperand(ArgNo+1)->getType() != AI->getType()) { 898bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 899bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 900bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 901bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 902bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 903bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 904bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 905bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 906bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 907bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.append(CI->op_begin()+1, CI->op_begin()+1+ArgNo); 908bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 909bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 910bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 911bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (NewCall->getType() != llvm::Type::VoidTy) 912bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 913bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setCallingConv(CI->getCallingConv()); 914bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 915bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 916bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 917bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!CI->use_empty()) 918bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->replaceAllUsesWith(NewCall); 919bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 920bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 921bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 922bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 923bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 924b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 9252b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson const llvm::FunctionType *Ty; 926b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 927b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner 9282b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { 9292b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson bool isVariadic = D->getType()->getAsFunctionProtoType()->isVariadic(); 9302b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson 9312b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = getTypes().GetFunctionType(getTypes().getFunctionInfo(MD), isVariadic); 9322b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } else { 9332b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = cast<llvm::FunctionType>(getTypes().ConvertType(D->getType())); 9342b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson 9352b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // As a special case, make sure that definitions of K&R function 9362b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // "type foo()" aren't declared as varargs (which forces the backend 9372b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // to do unnecessary work). 9382b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (D->getType()->isFunctionNoProtoType()) { 9392b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson assert(Ty->isVarArg() && "Didn't lower type as expected"); 9402b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // Due to stret, the lowered function could have arguments. 9412b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // Just create the same type as was lowered by ConvertType 9422b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // but strip off the varargs bit. 9432b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson std::vector<const llvm::Type*> Args(Ty->param_begin(), Ty->param_end()); 9442b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = llvm::FunctionType::get(Ty->getReturnType(), Args, false); 9452b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } 946ff75e1db95a53c7606e0bb114cf9adc59ab3d7f6Chris Lattner } 947d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar 9489fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 949b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 95034809507232bc4c3c4840c7d092c7440219fddafChris Lattner 9510558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 9520558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 9530558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 9540558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 9550558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 9560558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 9570558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 9580558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 959bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 960bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 96142745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 962bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 9630558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 96434809507232bc4c3c4840c7d092c7440219fddafChris Lattner 96562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 96662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 96762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 96862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 96962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 97062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 97162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f(int x)"). Start by making a new function of the 97262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // correct type, RAUW, then steal the name. 97334809507232bc4c3c4840c7d092c7440219fddafChris Lattner GlobalDeclMap.erase(getMangledName(D)); 974b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 975bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewFn->takeName(OldFn); 976bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 977bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 978bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 979bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 9809fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 981bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 9829fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 9839fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 98462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 98562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 986bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 987bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Constant *NewPtrForOldDecl = 988bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 989bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 990bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 99162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 99262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 993bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 99462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 9950558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 996bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 9970558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 9980558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 999bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1000219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 10016379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 10027c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 10037c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 1004219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 100534809507232bc4c3c4840c7d092c7440219fddafChris Lattner if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1006219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 100734809507232bc4c3c4840c7d092c7440219fddafChris Lattner if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1008219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1009bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1010bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1011bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattnervoid CodeGenModule::EmitAliasDefinition(const ValueDecl *D) { 1012bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const AliasAttr *AA = D->getAttr<AliasAttr>(); 1013bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1014bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1015bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1016bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1017bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Unique the name through the identifier table. 1018bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const char *AliaseeName = AA->getAliasee().c_str(); 1019bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner AliaseeName = getContext().Idents.get(AliaseeName).getName(); 1020bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1021bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1022bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1023bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1024bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 1025b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner Aliasee = GetOrCreateLLVMFunction(AliaseeName, DeclTy, GlobalDecl()); 1026bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1027bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Aliasee = GetOrCreateLLVMGlobal(AliaseeName, 1028bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::PointerType::getUnqual(DeclTy), 0); 1029bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1030bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 1031bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::GlobalValue *GA = 1032bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1033bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1034bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 1035bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1036bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // See if there is already something with the alias' name in the module. 1037bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const char *MangledName = getMangledName(D); 1038bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 1039bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1040bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry && !Entry->isDeclaration()) { 1041bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a definition in the module, then it wins over the alias. 1042bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // This is dubious, but allow it to be safe. Just ignore the alias. 1043bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner GA->eraseFromParent(); 1044bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner return; 1045bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 1046bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1047bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1048bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1049bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1050bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1051bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1052bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1053bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1054bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1055bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1056bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1057bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1058bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1059bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 1060bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1061bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Now we know that there is no conflict, set the name. 1062bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry = GA; 1063bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner GA->setName(MangledName); 1064bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 10657c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 10667c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 10677c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 10687c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (D->hasAttr<DLLExportAttr>()) { 10697c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 10707c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 10717297134f128423fce2e88f92421ed135bded7d4eDouglas Gregor if (FD->getBody(getContext())) 10727c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 10737c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 10747c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 10757c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 10767c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else if (D->hasAttr<WeakAttr>() || D->hasAttr<WeakImportAttr>()) { 10777c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 10787c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 10797c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 10807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1081bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1082bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1083b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1084b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 1085c136e6cf237711f9f1324637a0b2cdf6ae8e79e4Mike Stumpllvm::Value *CodeGenModule::getBuiltinLibFunction(unsigned BuiltinID) { 10863e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 10873e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 10883e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 1089bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 10903e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 10913e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 10923e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 10933e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 1094bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 1095bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // Get the type for the builtin. 1096370ab3f1373841d70582feac9e35c3c6b3489f63Douglas Gregor Builtin::Context::GetBuiltinTypeError Error; 1097370ab3f1373841d70582feac9e35c3c6b3489f63Douglas Gregor QualType Type = Context.BuiltinInfo.GetBuiltinType(BuiltinID, Context, Error); 1098370ab3f1373841d70582feac9e35c3c6b3489f63Douglas Gregor assert(Error == Builtin::Context::GE_None && "Can't get builtin type"); 1099370ab3f1373841d70582feac9e35c3c6b3489f63Douglas Gregor 1100bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner const llvm::FunctionType *Ty = 1101bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner cast<llvm::FunctionType>(getTypes().ConvertType(Type)); 1102bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 1103b808c952bbff821dce727dd801a1098d64394f98Chris Lattner // Unique the name through the identifier table. 1104b808c952bbff821dce727dd801a1098d64394f98Chris Lattner Name = getContext().Idents.get(Name).getName(); 1105bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // FIXME: param attributes for sext/zext etc. 1106b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl()); 1107bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1108bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 11097acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 11107acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 11117acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 11127acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 11137acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1114bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 11155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerllvm::Function *CodeGenModule::getMemCpyFn() { 11165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (MemCpyFn) return MemCpyFn; 11174e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *IntPtr = TheTargetData.getIntPtrType(); 11184e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemCpyFn = getIntrinsic(llvm::Intrinsic::memcpy, &IntPtr, 1); 11195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1120c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 11210c99509927a0c7a48490486b9fec287b63e5c09cEli Friedmanllvm::Function *CodeGenModule::getMemMoveFn() { 11220c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman if (MemMoveFn) return MemMoveFn; 11234e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *IntPtr = TheTargetData.getIntPtrType(); 11244e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemMoveFn = getIntrinsic(llvm::Intrinsic::memmove, &IntPtr, 1); 11250c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman} 11260c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman 112741ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venanciollvm::Function *CodeGenModule::getMemSetFn() { 112841ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio if (MemSetFn) return MemSetFn; 11294e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *IntPtr = TheTargetData.getIntPtrType(); 11304e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemSetFn = getIntrinsic(llvm::Intrinsic::memset, &IntPtr, 1); 113141ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio} 11327acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner 1133e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlssonstatic void appendFieldAndPadding(CodeGenModule &CGM, 1134e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson std::vector<llvm::Constant*>& Fields, 113544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldDecl *FieldD, FieldDecl *NextFieldD, 113644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor llvm::Constant* Field, 11373c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner RecordDecl* RD, const llvm::StructType *STy) { 1138e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson // Append the field. 1139e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson Fields.push_back(Field); 1140e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 114144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor int StructFieldNo = CGM.getTypes().getLLVMFieldNo(FieldD); 1142e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1143e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson int NextStructFieldNo; 114444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (!NextFieldD) { 1145e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson NextStructFieldNo = STy->getNumElements(); 1146e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson } else { 114744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextStructFieldNo = CGM.getTypes().getLLVMFieldNo(NextFieldD); 1148e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson } 1149e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1150e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson // Append padding 1151e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson for (int i = StructFieldNo + 1; i < NextStructFieldNo; i++) { 1152e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson llvm::Constant *C = 1153e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson llvm::Constant::getNullValue(STy->getElementType(StructFieldNo + 1)); 1154e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1155e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson Fields.push_back(C); 1156e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson } 1157e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson} 1158e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1159bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattnerllvm::Constant *CodeGenModule:: 11608d4141f83d9de379547cf05bd75d4c6cf894b189Steve NaroffGetAddrOfConstantCFString(const StringLiteral *Literal) { 1161b59212a6e494d2c364b54462f545833902c29158Steve Naroff std::string str; 1162271474e32f38cc5bd735c1006e499996cbc6e2d1Chris Lattner unsigned StringLength = 0; 1163b59212a6e494d2c364b54462f545833902c29158Steve Naroff 1164e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff bool isUTF16 = false; 1165e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff if (Literal->containsNonAsciiOrNull()) { 1166e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff // Convert from UTF-8 to UTF-16. 1167e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff llvm::SmallVector<UTF16, 128> ToBuf(Literal->getByteLength()); 1168e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff const UTF8 *FromPtr = (UTF8 *)Literal->getStrData(); 1169e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff UTF16 *ToPtr = &ToBuf[0]; 1170e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff 1171e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff ConversionResult Result; 1172e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff Result = ConvertUTF8toUTF16(&FromPtr, FromPtr+Literal->getByteLength(), 1173e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff &ToPtr, ToPtr+Literal->getByteLength(), 1174e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff strictConversion); 1175aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff if (Result == conversionOK) { 1176aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff // FIXME: Storing UTF-16 in a C string is a hack to test Unicode strings 1177aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff // without doing more surgery to this routine. Since we aren't explicitly 1178aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff // checking for endianness here, it's also a bug (when generating code for 1179aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff // a target that doesn't match the host endianness). Modeling this as an 1180aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff // i16 array is likely the cleanest solution. 1181aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff StringLength = ToPtr-&ToBuf[0]; 1182aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff str.assign((char *)&ToBuf[0], StringLength*2);// Twice as many UTF8 chars. 1183aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff isUTF16 = true; 1184aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff } else if (Result == sourceIllegal) { 1185fd942628abfe30e30427875db953222ae99b4325Steve Naroff // FIXME: Have Sema::CheckObjCString() validate the UTF-8 string. 1186aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff str.assign(Literal->getStrData(), Literal->getByteLength()); 1187aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff StringLength = str.length(); 1188aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff } else 1189aa4a756185e77755aaa10ae50db08ae5be58e70aSteve Naroff assert(Result == conversionOK && "UTF-8 to UTF-16 conversion failed"); 1190b59212a6e494d2c364b54462f545833902c29158Steve Naroff 1191b59212a6e494d2c364b54462f545833902c29158Steve Naroff } else { 1192b59212a6e494d2c364b54462f545833902c29158Steve Naroff str.assign(Literal->getStrData(), Literal->getByteLength()); 1193b59212a6e494d2c364b54462f545833902c29158Steve Naroff StringLength = str.length(); 1194e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff } 1195c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson llvm::StringMapEntry<llvm::Constant *> &Entry = 1196c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson CFConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 1197c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 11988e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 11998e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar return C; 1200c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 12013e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zero = llvm::Constant::getNullValue(llvm::Type::Int32Ty); 12023e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 1203c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1204c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1205c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 1206c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = llvm::ArrayType::get(Ty, 0); 12073e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 12083e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // FIXME: This is fairly broken if 12093e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // __CFConstantStringClassReference is already defined, in that it 12103e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // will get renamed and the user will most likely see an opaque 12113e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // error message. This is a general issue with relying on 12123e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // particular names. 12133e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::GlobalVariable *GV = 1214c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson new llvm::GlobalVariable(Ty, false, 1215c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson llvm::GlobalVariable::ExternalLinkage, 0, 1216c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson "__CFConstantStringClassReference", 1217c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson &getModule()); 12183e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 12193e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 12203e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 12213e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1222c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 1223c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1224e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 1225e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson RecordDecl *CFRD = CFTy->getAsRecordType()->getDecl(); 12263e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 1227e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson const llvm::StructType *STy = 1228e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1229e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1230e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson std::vector<llvm::Constant*> Fields; 12316ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor RecordDecl::field_iterator Field = CFRD->field_begin(getContext()); 123244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1233c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 123444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldDecl *CurField = *Field++; 123544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldDecl *NextField = *Field++; 123644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 123744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CFConstantStringClassRef, CFRD, STy); 1238c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1239c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 124044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CurField = NextField; 124144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextField = *Field++; 12423e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 124344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 1244e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) 1245e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff : llvm::ConstantInt::get(Ty, 0x07C8), 1246e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff CFRD, STy); 1247c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1248c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 124944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CurField = NextField; 125044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextField = *Field++; 12513e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *C = llvm::ConstantArray::get(str); 1252a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 1253a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar const char *Sect, *Prefix; 1254a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar bool isConstant; 1255a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1256a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Prefix = getContext().Target.getUnicodeStringSymbolPrefix(); 1257a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Sect = getContext().Target.getUnicodeStringSection(); 1258a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar // FIXME: Why does GCC not set constant here? 1259a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar isConstant = false; 1260a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 1261a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Prefix = getContext().Target.getStringSymbolPrefix(true); 1262a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Sect = getContext().Target.getCFStringDataSection(); 1263a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar // FIXME: -fwritable-strings should probably affect this, but we 1264a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar // are following gcc here. 1265a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar isConstant = true; 1266a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 12678e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar llvm::GlobalVariable *GV = 1268a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar new llvm::GlobalVariable(C->getType(), isConstant, 12698e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar llvm::GlobalValue::InternalLinkage, 1270a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar C, Prefix, &getModule()); 1271a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (Sect) 12728e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 1273a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1274a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar unsigned Align = getContext().getTypeAlign(getContext().ShortTy)/8; 1275a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar GV->setAlignment(Align); 1276a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 127744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 12788e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2), 1279e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson CFRD, STy); 1280c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1281c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 128244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CurField = NextField; 128344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextField = 0; 1284c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 128544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 1286b59212a6e494d2c364b54462f545833902c29158Steve Naroff llvm::ConstantInt::get(Ty, StringLength), CFRD, STy); 1287c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1288c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 1289e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson C = llvm::ConstantStruct::get(STy, Fields); 12908e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV = new llvm::GlobalVariable(C->getType(), true, 12918e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar llvm::GlobalVariable::InternalLinkage, C, 12928e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar getContext().Target.getCFStringSymbolPrefix(), 12938e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar &getModule()); 12948e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 12958e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 12960c67829763b98bc670062b553897a851fab17401Anders Carlsson Entry.setValue(GV); 12973e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 12980c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1299c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 130045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 13016143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 13021e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 13036143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 13041e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const char *StrData = E->getStrData(); 13051e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar unsigned Len = E->getByteLength(); 13061e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 13071e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 13081e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar getContext().getAsConstantArrayType(E->getType()); 13091e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 13101e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 1311dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 13121e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar std::string Str(StrData, StrData+Len); 13131e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 1314dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner 1315dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 1316dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner RealLen *= getContext().Target.getWCharWidth()/8; 1317dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner 13181e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 13191e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 13201e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 13211e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 13221e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 13236143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 13246143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 13256143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 13266143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 13276143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 13286143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar return GetAddrOfConstantString(GetStringForStringLiteral(S)); 13296143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 13306143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1331eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1332eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1333eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1334eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1335eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1336eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1337a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1338a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1339eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1340eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1341eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1342a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 134345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattnerstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 134445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 13455fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 13465fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 13476143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 13486143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar llvm::Constant *C = llvm::ConstantArray::get(str, false); 134945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 135045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 1351eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return new llvm::GlobalVariable(C->getType(), constant, 1352eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner llvm::GlobalValue::InternalLinkage, 13538e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar C, GlobalName, &CGM.getModule()); 135445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 135545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 13566143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 13576143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 13586143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 13596143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 13606143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 13616143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 13626143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 13636143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 13645fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, 13655fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 13668e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 13678e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 13688e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 13698e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 13708e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GlobalName = getContext().Target.getStringSymbolPrefix(IsConstant); 13718e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 13728e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 13738e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 13745fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar return GenerateStringLiteral(str, false, *this, GlobalName); 137545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 137645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner llvm::StringMapEntry<llvm::Constant *> &Entry = 137745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 137845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 137945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1380eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 138145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 138245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 13835fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); 138445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 138545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 138645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 13876143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 13886143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 13896143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 13906143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 13915fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, 13925fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 1393c9f29c61856ffb5f643cedbe87ac076f21a1381aChris Lattner return GetAddrOfConstantString(str + '\0', GlobalName); 13946143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 139541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1396af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1397af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 1398af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbarvoid CodeGenModule::EmitObjCPropertyImplementations(const 1399af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 1400653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor for (ObjCImplementationDecl::propimpl_iterator 1401653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor i = D->propimpl_begin(getContext()), 1402653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor e = D->propimpl_end(getContext()); i != e; ++i) { 1403af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 1404af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1405af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1406af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1407af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1408af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1409af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1410af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1411af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1412af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1413af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 1414653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor if (!D->getInstanceMethod(getContext(), PD->getGetterName())) 1415fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1416fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1417af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 1418653f1b1bf293a9bd96fd4dd6372e779cc7af1597Douglas Gregor !D->getInstanceMethod(getContext(), PD->getSetterName())) 1419fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1420fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1421af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1422af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1423af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1424af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 142591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 1426984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 14276ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor for (RecordDecl::decl_iterator I = ND->decls_begin(getContext()), 14286ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor E = ND->decls_end(getContext()); 1429984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 1430984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 1431984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 1432984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 143391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 143491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 143591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson if (LSD->getLanguage() != LinkageSpecDecl::lang_c) { 143691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 143791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 143891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 143991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 14406ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor for (RecordDecl::decl_iterator I = LSD->decls_begin(getContext()), 14416ab3524f72a6e64aa04973fa9433b5559abb3525Douglas Gregor E = LSD->decls_end(getContext()); 144291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 144391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 144491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 144591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 144641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 144741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 144841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 144941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 145041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 145141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 145241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 145341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 145441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 14552b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 145641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 145741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 14582a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitGlobal(GlobalDecl(cast<ValueDecl>(D))); 145941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 146041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 146195d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 146241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 1463984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 146441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 146595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 146695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 146795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 146827ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 146927ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 147027ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 147195d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson 147295d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 147341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 147438e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 147541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 147641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 1477b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCCategory: 1478b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 147941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1480285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 148141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 1482b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 148341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 148441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 148541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 1486af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 1487af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 148841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 148941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 149041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1491af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 1492af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 1493af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 1494af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 149541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1496af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 149741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 149841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 149941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 15007297134f128423fce2e88f92421ed135bded7d4eDouglas Gregor if (OMD->getBody(getContext())) 150141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 150241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 150341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 150441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCompatibleAlias: 1505305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 150641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 150741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 150891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 150991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 151041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 151141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 151241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 151341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 151441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar std::string AsmString(AD->getAsmString()->getStrData(), 151541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar AD->getAsmString()->getByteLength()); 151641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 151741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 151841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 151941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 152041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 152141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(S + '\n' + AsmString); 152241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 152341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 152441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 152541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar default: 152641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // Make sure we handled everything we should, every other kind is 152741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // a non-top-level decl. FIXME: Would be nice to have an 152841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // isTopLevelDeclKind function. Need to recode Decl::Kind to do 152941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // that easily. 153041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 153141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 153241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 1533