CodeGenModule.cpp revision 34771b594ca8cdf8cd2e40b27170efa4ed2833c5
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- CodeGenModule.cpp - Emit LLVM Code from ASTs for a Module --------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This coordinates the per-module state used while generating code. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenModule.h" 15bd3606426d389370616126af969904ec493cb105Chris Lattner#include "CGDebugInfo.h" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenFunction.h" 170dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar#include "CGCall.h" 18af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar#include "CGObjCRuntime.h" 195f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor#include "Mangle.h" 20bd3606426d389370616126af969904ec493cb105Chris Lattner#include "clang/Frontend/CompileOptions.h" 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 22c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2321ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 241b63e4f732dbc73d90abf886b4d21f8e3a165f6dChris Lattner#include "clang/Basic/Builtins.h" 252c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner#include "clang/Basic/Diagnostic.h" 268bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman#include "clang/Basic/SourceManager.h" 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 28e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff#include "clang/Basic/ConvertUTF.h" 29ec9426ca6039279bcc99bc2c625bb2abe4f0353dNate Begeman#include "llvm/CallingConv.h" 30bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner#include "llvm/Module.h" 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/Intrinsics.h" 3220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 37bd3606426d389370616126af969904ec493cb105Chris LattnerCodeGenModule::CodeGenModule(ASTContext &C, const CompileOptions &compileOpts, 38fb97b03e42d397405f617be0252be83e77a66f6eChris Lattner llvm::Module &M, const llvm::TargetData &TD, 39bd3606426d389370616126af969904ec493cb105Chris Lattner Diagnostic &diags) 40bd3606426d389370616126af969904ec493cb105Chris Lattner : BlockModule(C, M, TD, Types, *this), Context(C), 41bd3606426d389370616126af969904ec493cb105Chris Lattner Features(C.getLangOptions()), CompileOpts(compileOpts), TheModule(M), 422a998148a6823c44d67da347c95eb2ea21f6b986Mike Stump TheTargetData(TD), Diags(diags), Types(C, M, TD), Runtime(0), 43a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson MemCpyFn(0), MemMoveFn(0), MemSetFn(0), CFConstantStringClassRef(0), 44a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext(M.getContext()) { 45208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar 463c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner if (!Features.ObjC1) 473c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = 0; 483c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (!Features.NeXTRuntime) 493c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateGNUObjCRuntime(*this); 503c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (Features.ObjCNonFragileABI) 513c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacNonFragileABIObjCRuntime(*this); 523c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else 533c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacObjCRuntime(*this); 54e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 55e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 566dba432c7b862c2219e5d6e52b0cd188fbf84b01Devang Patel DebugInfo = CompileOpts.DebugInfo ? new CGDebugInfo(this) : 0; 572b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 582b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 592b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 60815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 61815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 62815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 63815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 64815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 6589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson // We need to call this first because it can add deferred declarations. 6689ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson EmitCXXGlobalInitFunc(); 6789ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson 6882227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 69208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 70208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 71208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 726bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 736bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 74532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 750269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 76f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 77f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 78488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 792c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 8090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 8190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 8290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 8390df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 8556b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 862c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 870a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 880a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 892c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 9058c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 91488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 92c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 9390df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 9490df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 9590df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 9690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 9856b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 99c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 1000a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 101c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 102c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 1031eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpLangOptions::VisibilityMode 10404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel DunbarCodeGenModule::getDeclVisibilityMode(const Decl *D) const { 10504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 10604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (VD->getStorageClass() == VarDecl::PrivateExtern) 10704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 10804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 10940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) { 11004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (attr->getVisibility()) { 11104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar default: assert(0 && "Unknown visibility!"); 1121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case VisibilityAttr::DefaultVisibility: 11304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Default; 11404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::HiddenVisibility: 11504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 11604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::ProtectedVisibility: 11704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Protected; 11804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar } 1197e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1206ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 12104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return getLangOptions().getVisibilityMode(); 1224f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman} 1234f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman 1241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 12504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar const Decl *D) const { 12604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 127df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 1287e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 1296ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 1307e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1316ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 13204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (getDeclVisibilityMode(D)) { 1337cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian default: assert(0 && "Unknown visibility!"); 13404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Default: 13504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 13604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Hidden: 13704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 13804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Protected: 13904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); 1407cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian } 1417cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 1427cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 1432a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlssonconst char *CodeGenModule::getMangledName(const GlobalDecl &GD) { 1444a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 1451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1462a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 1472a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledCXXCtorName(D, GD.getCtorType()); 1482a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 1492a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledCXXDtorName(D, GD.getDtorType()); 1501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1512a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson return getMangledName(ND); 1522a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson} 1532a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson 1545f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// \brief Retrieves the mangled name for the given declaration. 1555f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1565f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// If the given declaration requires a mangled name, returns an 157c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// const char* containing the mangled name. Otherwise, returns 158c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// the unmangled name. 1595f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1606ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregorconst char *CodeGenModule::getMangledName(const NamedDecl *ND) { 161c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner // In C, functions with no attributes never need to be mangled. Fastpath them. 162c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner if (!getLangOptions().CPlusPlus && !ND->hasAttrs()) { 163c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); 1643c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return ND->getNameAsCString(); 165c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner } 1661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1676ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor llvm::SmallString<256> Name; 1686ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor llvm::raw_svector_ostream Out(Name); 169fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar if (!mangleName(ND, Context, Out)) { 170fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); 1713c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return ND->getNameAsCString(); 172fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar } 1735f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 1746ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor Name += '\0'; 17595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson return UniqueMangledName(Name.begin(), Name.end()); 17695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson} 17795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson 17895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlssonconst char *CodeGenModule::UniqueMangledName(const char *NameStart, 17995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson const char *NameEnd) { 18095d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson assert(*(NameEnd - 1) == '\0' && "Mangled name must be null terminated!"); 1811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18295d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson return MangledNames.GetOrCreateValue(NameStart, NameEnd).getKeyData(); 1835f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 1845f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 1856d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 1866d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 1876bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 18849988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 1896bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 1906d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 1916d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 1926bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 1936bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 1946bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 19549988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 1966bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 1976bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 1986bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 1996bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 2006bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 2016bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 2021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 2036bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<const llvm::Type*>(), 2046bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar false); 20596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 2066bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2076bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 2081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType* CtorStructTy = 2091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), 21096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 2116bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2126bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 2136bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 2146bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 2156bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 2161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 2170032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 2183c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 21908e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 2206bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 2216bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2226bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 22396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 2241c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 225572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 2267db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 2271c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 2286d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 2296d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 2306d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 231532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 232532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 233532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 234532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 235532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 236532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 23796e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 238532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 239532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 2401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *gv = 2411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(TheModule, Array->getType(), false, 2421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::AppendingLinkage, Array, 2431c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.global.annotations"); 244532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 245532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 246532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 24786daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattnerstatic CodeGenModule::GVALinkage 2481eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpGetLinkageForFunction(ASTContext &Context, const FunctionDecl *FD, 24968584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor const LangOptions &Features) { 2501fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor // The kind of external linkage this function will have, if it is not 2511fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor // inline or static. 2521fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor CodeGenModule::GVALinkage External = CodeGenModule::GVA_StrongExternal; 2531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (Context.getLangOptions().CPlusPlus && 254d0e3daf2b980b505e535d35b432c938c6d0208efDouglas Gregor FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) 2551fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor External = CodeGenModule::GVA_TemplateInstantiation; 2561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 257167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 258167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson // C++ member functions defined inside the class are always inline. 259f5cecfbdcd20be224861f9e67c5973a9a2b61512Argyrios Kyrtzidis if (MD->isInline() || !MD->isOutOfLine()) 260167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson return CodeGenModule::GVA_CXXInline; 2611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2621fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor return External; 263167b824ce1947bf71ec8a71296daa2c54ebe58dfAnders Carlsson } 2641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26543907e87c776391d7d96da04b48e7bf06d8baafcEli Friedman // "static" functions get internal linkage. 2665e222139610a9f8b2b5f4ddd112f10dec9ec1e97Eli Friedman if (FD->getStorageClass() == FunctionDecl::Static) 2677c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar return CodeGenModule::GVA_Internal; 2687c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 269005eedce54da6580de37bb115bf581008637e4b1Chris Lattner if (!FD->isInline()) 2701fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor return External; 2711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2721fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor if (!Features.CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 2731fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor // GNU or C99 inline semantics. Determine whether this symbol should be 2741fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor // externally visible. 2751fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor if (FD->isInlineDefinitionExternallyVisible()) 2761fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor return External; 277cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner 2781fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor // C99 inline semantics, where the symbol is not externally visible. 279b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor return CodeGenModule::GVA_C99Inline; 2801fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor } 281b3efa98e320590e8be9d62818e89e599303e65b4Douglas Gregor 2821fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor // C++ inline semantics 2831fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor assert(Features.CPlusPlus && "Must be in C++ mode"); 2841fc09a92d0bffda20e06fa882388c01e192e2069Douglas Gregor return CodeGenModule::GVA_CXXInline; 2857c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 2867c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 2877c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar/// SetFunctionDefinitionAttributes - Set attributes for a global. 288b97b69244a4e7916c7b8fca28fa21b36ce5b30b2Daniel Dunbar/// 289f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump/// FIXME: This is currently only done for aliases and functions, but not for 290f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump/// variables (these details are set in EmitGlobalVarDefinition for variables). 2917c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 2927c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 29368584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor GVALinkage Linkage = GetLinkageForFunction(getContext(), D, Features); 2947c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 29555d6f50b23a1fd0a04b568787a25beb7537e6c9bDaniel Dunbar if (Linkage == GVA_Internal) { 2969f9427999cf69b3b89cd0ed3be16ed27a1c282c7Chris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 29740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis } else if (D->hasAttr<DLLExportAttr>()) { 2987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setLinkage(llvm::Function::DLLExportLinkage); 29940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis } else if (D->hasAttr<WeakAttr>()) { 30044b0bc008ee11cdee69ad12210ca7550e4fa426aChris Lattner GV->setLinkage(llvm::Function::WeakAnyLinkage); 301cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner } else if (Linkage == GVA_C99Inline) { 302cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 303cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // definition somewhere else, so we can use available_externally linkage. 304d9d049a93c55624908e81cf3927b7905efeba05fChris Lattner GV->setLinkage(llvm::Function::AvailableExternallyLinkage); 3051fd2dd145d9bcdf0b8d60a88e1795b6ae83656f5Douglas Gregor } else if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) { 30686daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // In C++, the compiler has to emit a definition in every translation unit 30786daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // that references the function. We should use linkonce_odr because 30886daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // a) if all references in this translation unit are optimized away, we 30986daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 31086daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 31186daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // definition is dependable. 31286daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner GV->setLinkage(llvm::Function::LinkOnceODRLinkage); 3137c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 314cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner assert(Linkage == GVA_StrongExternal); 315cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner // Otherwise, we have strong external linkage. 3167c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setLinkage(llvm::Function::ExternalLinkage); 3170dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar } 318d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 3197c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 320d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 321d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 3227dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 3231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 3247dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 325ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 326761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 327ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 328761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 329ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 330ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 331f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 332f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3337c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 3347c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 33574ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 3361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 337af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 33840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<AlwaysInlineAttr>()) 339af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 3401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3411feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 34281ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 343f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 344f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 3467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 3477c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar setGlobalVisibility(GV, D); 3487c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 34940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 3507c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 3517c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 35240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 3537c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 3547c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 3557c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3560e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 3570e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 3580e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 3590e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 3600e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 3617c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3627c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 3637c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 3640e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 365f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 366f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 367f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbarvoid CodeGenModule::SetFunctionAttributes(const FunctionDecl *FD, 368c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 369c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 370c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 371c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(FD), F); 3721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3737c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 3747c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 3751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 37640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 3777c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 3781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 37940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<WeakImportAttr>()) { 3807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 3811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 3827c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 3837c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 3841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 3857c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 3867c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 38740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 3887c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 389219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 390219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 3910269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 3921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 3930269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 39435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 3950269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 3960269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 3970269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 3980269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 399ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 4000269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 4010269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4020032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Type *i8PTy = 4030032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::PointerType::getUnqual(llvm::Type::getInt8Ty(VMContext)); 4041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 40535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 40635f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 40735f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 40835f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 4091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 4101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 411a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 41235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 4131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 414c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 415c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 41696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 4171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 4191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 4200269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 4217db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 4221c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 4230269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4240269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 4250269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 4260269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4270269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 42867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 42967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 43067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 43167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner while (!DeferredDeclsToEmit.empty()) { 4322a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 43367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 43467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 43567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // The mangled name for the decl must have been emitted in GlobalDeclMap. 43667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Look it up to see if it was defined with a stronger definition (e.g. an 43767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // extern inline function with a strong function redefinition). If so, 43867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // just ignore the deferred decl. 43967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner llvm::GlobalValue *CGRef = GlobalDeclMap[getMangledName(D)]; 44067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 4411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 44267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 44367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 4441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 44567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 44667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 44767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 4485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 4518bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 4521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 4531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// GlobalValue being annotated. The second field is the constant string 4541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// created from the AnnotateAttr's annotation. The third field is a constant 4558bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 4568bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 4578bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4588bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 4598bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 4608bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 4628bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 4638bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 4648bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 4658bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 4668bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 4678bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 4680032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *SBP = 4690032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::PointerType::getUnqual(llvm::Type::getInt8Ty(VMContext)); 4701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *anno = llvm::ConstantArray::get(VMContext, 4710032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson AA->getAnnotation(), true); 4720032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *unit = llvm::ConstantArray::get(VMContext, 4730032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson M->getModuleIdentifier(), 4748bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 4758bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 4768bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 4778bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 4781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *annoGV = 47995b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, anno->getType(), false, 48095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, anno, 48195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GV->getName()); 4828bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 4838bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 48495b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, unit->getType(), false, 4851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::PrivateLinkage, unit, 48695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ".str"); 4878bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 48857d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 4898bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 4903c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, SBP), 4913c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(annoGV, SBP), 4923c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(unitGV, SBP), 4930032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) 4948bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 49547a434ff3d49e7906eda88e8e8242e4297725b32Owen Anderson return llvm::ConstantStruct::get(VMContext, Fields, 4, false); 4968bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 4978bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 49873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbarbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 4995c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // Never defer when EmitAllDecls is specified or the decl has 5005c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // attribute used. 50140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Features.EmitAllDecls || Global->hasAttr<UsedAttr>()) 50273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 503bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 504bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 50573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Constructors and destructors should never be deferred. 5061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (FD->hasAttr<ConstructorAttr>() || 50740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<DestructorAttr>()) 50873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 50973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 51068584ed35ad819a1668e3f527ba7f5dd4ae6a333Douglas Gregor GVALinkage Linkage = GetLinkageForFunction(getContext(), FD, Features); 5111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 512dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner // static, static inline, always_inline, and extern inline functions can 51386daeee2d4aa6523679f07f27a826bf4c42ca95dChris Lattner // always be deferred. Normal inline functions can be deferred in C99/C++. 514cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 515cbb8fc18d86a886856f5b852a6a3ead71fec17f9Chris Lattner Linkage == GVA_CXXInline) 516dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return true; 517dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return false; 51873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar } 5191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 520dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner const VarDecl *VD = cast<VarDecl>(Global); 521dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner assert(VD->isFileVarDecl() && "Invalid decl"); 522b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor 523dbb5a376c8b9272813a30c5519031e9ea2fb071fChris Lattner return VD->getStorageClass() == VarDecl::Static; 52473241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 52573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 526b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 5274a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 5281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 529bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 530bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 53140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 532bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner return EmitAliasDefinition(Global); 533219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 53467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 5355e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 53673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 53773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 53873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 5390269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 5400269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 541bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 542bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 543b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor // In C++, if this is marked "extern", defer code generation. 5442928c2107f2e0007f35fe1c224aab63535f1403dAnders Carlsson if (getLangOptions().CPlusPlus && !VD->getInit() && 5451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (VD->getStorageClass() == VarDecl::Extern || 54648a83b5e7ae4051c7c11680ac00c1fa02d610a62Douglas Gregor VD->isExternC())) 547b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor return; 548b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor 549b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor // In C, if this isn't a definition, defer code generation. 550b6c8c8bd8d362c8a6cdb767415b0d21e62b77eb2Douglas Gregor if (!getLangOptions().CPlusPlus && !VD->getInit()) 55173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 5524c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 5534c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 55467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 55567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 55673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (MayDeferGeneration(Global)) { 55767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // If the value has already been used, add it directly to the 55867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // DeferredDeclsToEmit list. 5592a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson const char *MangledName = getMangledName(GD); 56067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (GlobalDeclMap.count(MangledName)) 5612a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDeclsToEmit.push_back(GD); 56267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner else { 56367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 56467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // first use of the mangled name will cause it to move into 56567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // DeferredDeclsToEmit. 5662a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson DeferredDecls[MangledName] = GD; 56767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 568bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 569bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 570bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 571bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Otherwise emit the definition. 5722a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitGlobalDefinition(GD); 5734c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 5744c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 575b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 5764a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 5771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5782a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 5792a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson EmitCXXConstructor(CD, GD.getCtorType()); 5807267c1693abe7875b0c57268be05005ae013c6c9Anders Carlsson else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 5817267c1693abe7875b0c57268be05005ae013c6c9Anders Carlsson EmitCXXDestructor(DD, GD.getDtorType()); 582b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner else if (isa<FunctionDecl>(D)) 583b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner EmitGlobalFunctionDefinition(GD); 5842a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 585bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalVarDefinition(VD); 5862a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson else { 587bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(0 && "Invalid argument to EmitGlobalDefinition()"); 588bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 589bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 590bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 59174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 59274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 59374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 59474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 59574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 59674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 59774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 59874391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetOrCreateLLVMFunction(const char *MangledName, 59974391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty, 600b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner GlobalDecl D) { 6010558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 6020558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 6030558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 6040558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 6050558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 6061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6070558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 60896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 6093c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, PTy); 6100558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 6111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 61267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 61367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 61467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 6151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = 6169fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner DeferredDecls.find(MangledName); 61767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 61867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 61967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 62067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 62167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 622b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner } else if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl())) { 6230c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // If this the first reference to a C++ inline function in a class, queue up 6240c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // the deferred function body for emission. These are not seen as 6250c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // top-level declarations. 626b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner if (FD->isThisDeclarationADefinition() && MayDeferGeneration(FD)) 627b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner DeferredDeclsToEmit.push_back(D); 628c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian // A called constructor which has no definition or declaration need be 629c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian // synthesized. 630c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(FD)) { 6311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CXXRecordDecl *ClassDecl = 632c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian cast<CXXRecordDecl>(CD->getDeclContext()); 63397a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian if (CD->isCopyConstructor(getContext())) 63497a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian DeferredCopyConstructorToEmit(D); 6359889652dbc10060cd604861ed2e5bc6719f845b0Fariborz Jahanian else if (!ClassDecl->hasUserDeclaredConstructor()) 636c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian DeferredDeclsToEmit.push_back(D); 637c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian } 6381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump else if (isa<CXXDestructorDecl>(FD)) 639b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian DeferredDestructorToEmit(D); 640ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian else if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) 641ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian if (MD->isCopyAssignment()) 642ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian DeferredCopyAssignmentToEmit(D); 64367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 6441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6450558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // This function doesn't have a complete type (for example, the return 6460558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // type is an incomplete struct). Use a fake type instead, and make 6470558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // sure not to try to set attributes. 648c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction = false; 6490558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (!isa<llvm::FunctionType>(Ty)) { 6500032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson Ty = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 6510558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner std::vector<const llvm::Type*>(), false); 652c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman IsIncompleteFunction = true; 6530558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 6541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Function *F = llvm::Function::Create(cast<llvm::FunctionType>(Ty), 6550558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function::ExternalLinkage, 656d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner "", &getModule()); 657d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner F->setName(MangledName); 658c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (D.getDecl()) 659c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman SetFunctionAttributes(cast<FunctionDecl>(D.getDecl()), F, 660c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman IsIncompleteFunction); 6610558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = F; 6620558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return F; 6630558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 6640558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 66597a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian/// Defer definition of copy constructor(s) which need be implicitly defined. 66697a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanianvoid CodeGenModule::DeferredCopyConstructorToEmit(GlobalDecl CopyCtorDecl) { 6671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CXXConstructorDecl *CD = 66897a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian cast<CXXConstructorDecl>(CopyCtorDecl.getDecl()); 66997a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(CD->getDeclContext()); 67097a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian if (ClassDecl->hasTrivialCopyConstructor() || 67197a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian ClassDecl->hasUserDeclaredCopyConstructor()) 67297a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian return; 6731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 67497a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian // First make sure all direct base classes and virtual bases and non-static 67597a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian // data mebers which need to have their copy constructors implicitly defined 67697a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian // are defined. 12.8.p7 67797a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian for (CXXRecordDecl::base_class_const_iterator Base = ClassDecl->bases_begin(); 67897a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian Base != ClassDecl->bases_end(); ++Base) { 67997a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian CXXRecordDecl *BaseClassDecl 68097a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian = cast<CXXRecordDecl>(Base->getType()->getAs<RecordType>()->getDecl()); 6811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CXXConstructorDecl *BaseCopyCtor = 68280e4b9e0e87064a824d72b6ff89074206ecced58Fariborz Jahanian BaseClassDecl->getCopyConstructor(Context, 0)) 68397a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian GetAddrOfCXXConstructor(BaseCopyCtor, Ctor_Complete); 68497a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian } 6851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 68697a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian for (CXXRecordDecl::field_iterator Field = ClassDecl->field_begin(), 68797a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian FieldEnd = ClassDecl->field_end(); 68897a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian Field != FieldEnd; ++Field) { 68997a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian QualType FieldType = Context.getCanonicalType((*Field)->getType()); 69097a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian if (const ArrayType *Array = Context.getAsArrayType(FieldType)) 69197a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian FieldType = Array->getElementType(); 69297a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian if (const RecordType *FieldClassType = FieldType->getAs<RecordType>()) { 693e64941280877d065a27e8cefd2a9038256d0e3acFariborz Jahanian if ((*Field)->isAnonymousStructOrUnion()) 694e64941280877d065a27e8cefd2a9038256d0e3acFariborz Jahanian continue; 69597a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian CXXRecordDecl *FieldClassDecl 696e64941280877d065a27e8cefd2a9038256d0e3acFariborz Jahanian = cast<CXXRecordDecl>(FieldClassType->getDecl()); 6971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CXXConstructorDecl *FieldCopyCtor = 69880e4b9e0e87064a824d72b6ff89074206ecced58Fariborz Jahanian FieldClassDecl->getCopyConstructor(Context, 0)) 69997a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian GetAddrOfCXXConstructor(FieldCopyCtor, Ctor_Complete); 70097a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian } 70197a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian } 70297a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian DeferredDeclsToEmit.push_back(CopyCtorDecl); 703ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian} 704ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian 705ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian/// Defer definition of copy assignments which need be implicitly defined. 706ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanianvoid CodeGenModule::DeferredCopyAssignmentToEmit(GlobalDecl CopyAssignDecl) { 707ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian const CXXMethodDecl *CD = cast<CXXMethodDecl>(CopyAssignDecl.getDecl()); 708ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(CD->getDeclContext()); 7091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 710ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian if (ClassDecl->hasTrivialCopyAssignment() || 711ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian ClassDecl->hasUserDeclaredCopyAssignment()) 712ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian return; 7131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 714ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian // First make sure all direct base classes and virtual bases and non-static 715ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian // data mebers which need to have their copy assignments implicitly defined 716ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian // are defined. 12.8.p12 717ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian for (CXXRecordDecl::base_class_const_iterator Base = ClassDecl->bases_begin(); 718ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian Base != ClassDecl->bases_end(); ++Base) { 719ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian CXXRecordDecl *BaseClassDecl 720ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian = cast<CXXRecordDecl>(Base->getType()->getAs<RecordType>()->getDecl()); 721ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian const CXXMethodDecl *MD = 0; 722183d7181fd59842ac969cbc6fe0376f85dc63ae4Fariborz Jahanian if (!BaseClassDecl->hasTrivialCopyAssignment() && 723183d7181fd59842ac969cbc6fe0376f85dc63ae4Fariborz Jahanian !BaseClassDecl->hasUserDeclaredCopyAssignment() && 724183d7181fd59842ac969cbc6fe0376f85dc63ae4Fariborz Jahanian BaseClassDecl->hasConstCopyAssignment(getContext(), MD)) 725555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson GetAddrOfFunction(MD, 0); 726ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian } 7271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 728ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian for (CXXRecordDecl::field_iterator Field = ClassDecl->field_begin(), 729ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian FieldEnd = ClassDecl->field_end(); 730ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian Field != FieldEnd; ++Field) { 731ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian QualType FieldType = Context.getCanonicalType((*Field)->getType()); 732ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian if (const ArrayType *Array = Context.getAsArrayType(FieldType)) 733ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian FieldType = Array->getElementType(); 734ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian if (const RecordType *FieldClassType = FieldType->getAs<RecordType>()) { 735ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian if ((*Field)->isAnonymousStructOrUnion()) 736ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian continue; 737ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian CXXRecordDecl *FieldClassDecl 738ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian = cast<CXXRecordDecl>(FieldClassType->getDecl()); 739ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian const CXXMethodDecl *MD = 0; 740183d7181fd59842ac969cbc6fe0376f85dc63ae4Fariborz Jahanian if (!FieldClassDecl->hasTrivialCopyAssignment() && 741183d7181fd59842ac969cbc6fe0376f85dc63ae4Fariborz Jahanian !FieldClassDecl->hasUserDeclaredCopyAssignment() && 742183d7181fd59842ac969cbc6fe0376f85dc63ae4Fariborz Jahanian FieldClassDecl->hasConstCopyAssignment(getContext(), MD)) 743555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson GetAddrOfFunction(MD, 0); 744ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian } 745ad25883a644dd6b52c7923dd128a7d05fb26213cFariborz Jahanian } 7461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump DeferredDeclsToEmit.push_back(CopyAssignDecl); 74797a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian} 74897a937532c24a8ea44317d4fdee26d9701a1e83cFariborz Jahanian 749b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanianvoid CodeGenModule::DeferredDestructorToEmit(GlobalDecl DtorDecl) { 750b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian const CXXDestructorDecl *DD = cast<CXXDestructorDecl>(DtorDecl.getDecl()); 751b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(DD->getDeclContext()); 752b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian if (ClassDecl->hasTrivialDestructor() || 753b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian ClassDecl->hasUserDeclaredDestructor()) 754b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian return; 755b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian 756b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian for (CXXRecordDecl::base_class_const_iterator Base = ClassDecl->bases_begin(); 757b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian Base != ClassDecl->bases_end(); ++Base) { 758b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian CXXRecordDecl *BaseClassDecl 759b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian = cast<CXXRecordDecl>(Base->getType()->getAs<RecordType>()->getDecl()); 7601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const CXXDestructorDecl *BaseDtor = 761b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian BaseClassDecl->getDestructor(Context)) 762b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian GetAddrOfCXXDestructor(BaseDtor, Dtor_Complete); 763b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian } 7641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 765b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian for (CXXRecordDecl::field_iterator Field = ClassDecl->field_begin(), 766b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian FieldEnd = ClassDecl->field_end(); 767b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian Field != FieldEnd; ++Field) { 768b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian QualType FieldType = Context.getCanonicalType((*Field)->getType()); 769b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian if (const ArrayType *Array = Context.getAsArrayType(FieldType)) 770b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian FieldType = Array->getElementType(); 771b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian if (const RecordType *FieldClassType = FieldType->getAs<RecordType>()) { 772b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian if ((*Field)->isAnonymousStructOrUnion()) 773b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian continue; 774b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian CXXRecordDecl *FieldClassDecl 775b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian = cast<CXXRecordDecl>(FieldClassType->getDecl()); 7761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const CXXDestructorDecl *FieldDtor = 777b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian FieldClassDecl->getDestructor(Context)) 778b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian GetAddrOfCXXDestructor(FieldDtor, Dtor_Complete); 779b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian } 780b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian } 781b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian DeferredDeclsToEmit.push_back(DtorDecl); 782b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian} 783b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian 784b193a414f13d7cfa2524a8149eff8d4871f8cbf6Fariborz Jahanian 78574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 78674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 78774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 788b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 78974391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 79074391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 79174391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 7924a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 7934fe95f99a2693f1145785ea5835ba6937e49c730Douglas Gregor return GetOrCreateLLVMFunction(getMangledName(GD), Ty, GD); 79474391b48b4791cded373683a3baf67314f358d50Chris Lattner} 79577ba708819285931932ecd33691a672bb59d221aEli Friedman 79674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 79774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 79874391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 79974391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 80074391b48b4791cded373683a3baf67314f358d50Chris Lattner const char *Name) { 80174391b48b4791cded373683a3baf67314f358d50Chris Lattner // Convert Name to be a uniqued string from the IdentifierInfo table. 80274391b48b4791cded373683a3baf67314f358d50Chris Lattner Name = getContext().Idents.get(Name).getName(); 803b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); 80474391b48b4791cded373683a3baf67314f358d50Chris Lattner} 805bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 80674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 80774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 80874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 80974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 81074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 81174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 81274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 81374391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetOrCreateLLVMGlobal(const char *MangledName, 81474391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::PointerType*Ty, 81574391b48b4791cded373683a3baf67314f358d50Chris Lattner const VarDecl *D) { 8163c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 8175d4f5c724533b994de05df49ae259120482ec366Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 81899b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 81974391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 820570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 8211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 82299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 8233c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 82499b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 8251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 82667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 82767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 82867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 8291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::DenseMap<const char*, GlobalDecl>::iterator DDI = 83067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.find(MangledName); 83167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 83267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 83367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 83467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 83567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 83667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 8371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 8391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 84099b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 8411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 0, "", 0, 84256ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 843d972678a053d4785772b75cf6c8d4ab74ac2c7f6Chris Lattner GV->setName(MangledName); 84449988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 84599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 84674391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 847f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 848f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 84974391b48b4791cded373683a3baf67314f358d50Chris Lattner GV->setConstant(D->getType().isConstant(Context)); 85049988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 85174391b48b4791cded373683a3baf67314f358d50Chris Lattner // FIXME: Merge with other attribute handling code. 85274391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D->getStorageClass() == VarDecl::PrivateExtern) 85304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 85449988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 8551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (D->hasAttr<WeakAttr>() || 85640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) 85774391b48b4791cded373683a3baf67314f358d50Chris Lattner GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 85856ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 85956ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 86074391b48b4791cded373683a3baf67314f358d50Chris Lattner } 8611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86274391b48b4791cded373683a3baf67314f358d50Chris Lattner return Entry = GV; 86374391b48b4791cded373683a3baf67314f358d50Chris Lattner} 864eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 865eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 86674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 86774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 86874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 86974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 87074391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 87174391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 87274391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 87374391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 87474391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 87574391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 8761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::PointerType *PTy = 87896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 87974391b48b4791cded373683a3baf67314f358d50Chris Lattner return GetOrCreateLLVMGlobal(getMangledName(D), PTy, D); 88074391b48b4791cded373683a3baf67314f358d50Chris Lattner} 8813f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 88274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 88374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 88474391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 88574391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 88674391b48b4791cded373683a3baf67314f358d50Chris Lattner const char *Name) { 88774391b48b4791cded373683a3baf67314f358d50Chris Lattner // Convert Name to be a uniqued string from the IdentifierInfo table. 88874391b48b4791cded373683a3baf67314f358d50Chris Lattner Name = getContext().Idents.get(Name).getName(); 88996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0); 890bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 891bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 89203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 89303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 89403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 8957520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 8967520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 8977520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 8987520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 8997520bd1de12af10ea08c662440565adbdf589317Douglas Gregor const char *MangledName = getMangledName(D); 9007520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (GlobalDeclMap.count(MangledName) == 0) { 901555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 90203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 9037520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 9047520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 9057520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 9067520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 90703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 90803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 90903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 910bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 9118f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 91277ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 9131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9148f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner if (D->getInit() == 0) { 915cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 91603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 91703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 91803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 91903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 92003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 92103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 92203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 92303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 92403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 925b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 92677ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 927e9352cc9818ba59e7cf88500ef048991c90f3821Anders Carlsson Init = EmitConstantExpr(D->getInit(), D->getType()); 9281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9296e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 9306e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman QualType T = D->getInit()->getType(); 93189ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 93289ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson CXXGlobalInits.push_back(D); 93389ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 93489ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 93589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 93689ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 93789ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 9386e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 9398f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 9408e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 9412d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 942570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 9431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 944570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 945570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 9469d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 9479d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 9489d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 949570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 950570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 9511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 952570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 953570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 9541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 955570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 956570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 957570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 958570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 959570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 960570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 961570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 962570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 963570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 964570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 965570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 966570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { 9671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 968570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Remove the old entry from GlobalDeclMap so that we'll create a new one. 969570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GlobalDeclMap.erase(getMangledName(D)); 970232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 971570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 972570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 9730558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner GV->takeName(cast<llvm::GlobalValue>(Entry)); 9740558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 97577ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 9761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 9773c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 978570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 97977ba708819285931932ecd33691a672bb59d221aEli Friedman 98077ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 981570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 98277ba708819285931932ecd33691a672bb59d221aEli Friedman } 98377ba708819285931932ecd33691a672bb59d221aEli Friedman 98440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 9858bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 9868bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 987f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 9888bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 9898bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 99088a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 991e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 992e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 993e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 994e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (D->getType().isConstant(Context)) { 995e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // FIXME: In C++, if the variable has a non-trivial ctor/dtor or any mutable 996e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // members, it cannot be declared "LLVM const". 997e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 998e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner } 9991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10000de40af3a3aa14e3854c0eafeabd08f6762801f9Eli Friedman GV->setAlignment(getContext().getDeclAlignInBytes(D)); 100108d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman 100288a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 10038fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner if (D->getStorageClass() == VarDecl::Static) 10048fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 100540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1006ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLImportLinkage); 100740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1008ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLExportLinkage); 1009e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1010e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1011e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setLinkage(llvm::GlobalVariable::WeakODRLinkage); 1012e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1013e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 1014e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner } else if (!CompileOpts.NoCommon && 1015309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 1016e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner !D->getAttr<SectionAttr>()) { 101704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::CommonLinkage); 1018e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // common vars aren't constant even if declared const. 1019e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 1020e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner } else 102104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); 10227e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar 10237c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 102404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 1025686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta // Emit global variable debug information. 10262d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner if (CGDebugInfo *DI = getDebugInfo()) { 102766031a5594bc9a7dc0dc5137c3e7955f835e4639Daniel Dunbar DI->setLocation(D->getLocation()); 1028686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta DI->EmitGlobalVariable(GV, D); 1029686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 103088a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 10315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1032bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1033bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1034bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1035bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1036bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1037bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1038bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1039bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1040bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1041bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1042bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1043bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1044bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1045bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 10461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1047bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 1048bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 1049bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1050bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1051bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner UI != E; ) { 1052bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 105308c93a7f2210b464e5abe298a5474b99414615f6Chris Lattner unsigned OpNo = UI.getOperandNo(); 1054bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*UI++); 105508c93a7f2210b464e5abe298a5474b99414615f6Chris Lattner if (!CI || OpNo != 0) continue; 10561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1057bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1058bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1059bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1060bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1061bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1062bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1063bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1064bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1065bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1066bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1067bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1068bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 1069bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getNumOperands()-1 == ArgNo || 1070bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->getOperand(ArgNo+1)->getType() != AI->getType()) { 1071bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1072bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1073bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1074bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1075bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1076bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 10771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1078bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1079bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 1080bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.append(CI->op_begin()+1, CI->op_begin()+1+ArgNo); 1081bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 1082bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 1083bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 10840032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson if (NewCall->getType() != llvm::Type::getVoidTy(Old->getContext())) 1085bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 1086bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 1087ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1088bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1089bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 1090bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!CI->use_empty()) 1091bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->replaceAllUsesWith(NewCall); 1092bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1093bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1094bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1095bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1096bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1097b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 10982b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson const llvm::FunctionType *Ty; 1099b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 11001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11012b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { 11022b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson bool isVariadic = D->getType()->getAsFunctionProtoType()->isVariadic(); 11031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11042b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = getTypes().GetFunctionType(getTypes().getFunctionInfo(MD), isVariadic); 11052b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } else { 11062b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson Ty = cast<llvm::FunctionType>(getTypes().ConvertType(D->getType())); 11071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11082b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // As a special case, make sure that definitions of K&R function 11092b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // "type foo()" aren't declared as varargs (which forces the backend 11102b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // to do unnecessary work). 11112b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson if (D->getType()->isFunctionNoProtoType()) { 11122b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson assert(Ty->isVarArg() && "Didn't lower type as expected"); 11131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Due to stret, the lowered function could have arguments. 11141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Just create the same type as was lowered by ConvertType 11152b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson // but strip off the varargs bit. 11162b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson std::vector<const llvm::Type*> Args(Ty->param_begin(), Ty->param_end()); 111796e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::FunctionType::get(Ty->getReturnType(), Args, false); 11182b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson } 1119ff75e1db95a53c7606e0bb114cf9adc59ab3d7f6Chris Lattner } 1120d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar 11219fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1122b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 11231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11240558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 11250558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 11260558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 11270558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 11280558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 11291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11310558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1132bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 11331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 113442745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1135bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 11360558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 113734809507232bc4c3c4840c7d092c7440219fddafChris Lattner 113862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 113962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 114062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 114162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 114262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 114362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 114462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f(int x)"). Start by making a new function of the 114562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // correct type, RAUW, then steal the name. 114634809507232bc4c3c4840c7d092c7440219fddafChris Lattner GlobalDeclMap.erase(getMangledName(D)); 1147b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 1148bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewFn->takeName(OldFn); 11491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1150bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1151bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1152bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 11539fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1154bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 11559fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 11569fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 11571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 115862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1159bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 11601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 11613c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1162bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1163bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 11641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 116562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1166bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 11671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11680558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1169bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 11701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11710558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 1172bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1173219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 11746379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 11757c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 11767c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 11771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 117840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1179219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 118040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1181219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1182bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1183bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1184bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattnervoid CodeGenModule::EmitAliasDefinition(const ValueDecl *D) { 118540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1186bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1187bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1188bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 11891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1190bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Unique the name through the identifier table. 1191bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const char *AliaseeName = AA->getAliasee().c_str(); 1192bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner AliaseeName = getContext().Idents.get(AliaseeName).getName(); 1193bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1194bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1195bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1196bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1197bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 1198b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner Aliasee = GetOrCreateLLVMFunction(AliaseeName, DeclTy, GlobalDecl()); 1199bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1200bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Aliasee = GetOrCreateLLVMGlobal(AliaseeName, 120196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1202bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1203bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 12041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1205bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1206bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1207bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 12081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1209bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // See if there is already something with the alias' name in the module. 1210bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner const char *MangledName = getMangledName(D); 1211bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 12121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1213bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry && !Entry->isDeclaration()) { 1214bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a definition in the module, then it wins over the alias. 1215bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // This is dubious, but allow it to be safe. Just ignore the alias. 1216bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner GA->eraseFromParent(); 1217bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner return; 1218bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 12191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1220bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1221bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1222bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1223bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1224bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1225bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1226bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1227bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 12281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12293c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1230bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1231bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1232bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 12331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1234bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Now we know that there is no conflict, set the name. 1235bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry = GA; 1236bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner GA->setName(MangledName); 1237bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 12387c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 12397c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 12407c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 124140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 12427c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 12437c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 12446fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (FD->getBody()) 12457c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 12467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 12477c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 12487c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 12491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 125040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) { 12517c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 12527c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 12537c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 12547c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1255bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1256bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1257b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1258b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 125934771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbarllvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, 126034771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar unsigned BuiltinID) { 12613e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 12621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 12633e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 12641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12653e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 12663e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 12673e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 12683e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 12691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1270bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // Get the type for the builtin. 127186df27bbdbb98c39ec2184695c0561209f91beddChris Lattner ASTContext::GetBuiltinTypeError Error; 127286df27bbdbb98c39ec2184695c0561209f91beddChris Lattner QualType Type = Context.GetBuiltinType(BuiltinID, Error); 127386df27bbdbb98c39ec2184695c0561209f91beddChris Lattner assert(Error == ASTContext::GE_None && "Can't get builtin type"); 1274370ab3f1373841d70582feac9e35c3c6b3489f63Douglas Gregor 12751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::FunctionType *Ty = 1276bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner cast<llvm::FunctionType>(getTypes().ConvertType(Type)); 1277bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 1278b808c952bbff821dce727dd801a1098d64394f98Chris Lattner // Unique the name through the identifier table. 1279b808c952bbff821dce727dd801a1098d64394f98Chris Lattner Name = getContext().Idents.get(Name).getName(); 128034771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD)); 1281bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1282bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 12837acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 12847acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 12857acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 12867acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 12877acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1288bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 12895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerllvm::Function *CodeGenModule::getMemCpyFn() { 12905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (MemCpyFn) return MemCpyFn; 12910032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); 12924e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemCpyFn = getIntrinsic(llvm::Intrinsic::memcpy, &IntPtr, 1); 12935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1294c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 12950c99509927a0c7a48490486b9fec287b63e5c09cEli Friedmanllvm::Function *CodeGenModule::getMemMoveFn() { 12960c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman if (MemMoveFn) return MemMoveFn; 12970032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); 12984e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemMoveFn = getIntrinsic(llvm::Intrinsic::memmove, &IntPtr, 1); 12990c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman} 13000c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman 130141ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venanciollvm::Function *CodeGenModule::getMemSetFn() { 130241ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio if (MemSetFn) return MemSetFn; 13030032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = TheTargetData.getIntPtrType(VMContext); 13044e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemSetFn = getIntrinsic(llvm::Intrinsic::memset, &IntPtr, 1); 130541ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio} 13067acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner 13071d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 13081d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 13091d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 131070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 13111d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 13121d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 13131d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned NumBytes = Literal->getByteLength(); 13141d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 13151d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Check for simple case. 13161d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 13171d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = NumBytes; 13181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), 13191d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength)); 13201d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar } 13211d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 13221d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 13231d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); 13241d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const UTF8 *FromPtr = (UTF8 *)Literal->getStrData(); 13251d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 13261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ConversionResult Result = ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 13281d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar &ToPtr, ToPtr + NumBytes, 13291d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar strictConversion); 13301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13311d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Check for conversion failure. 13321d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (Result != conversionOK) { 13331d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // FIXME: Have Sema::CheckObjCString() validate the UTF-8 string and remove 13341d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // this duplicate code. 13351d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar assert(Result == sourceIllegal && "UTF-8 to UTF-16 conversion failed"); 13361d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = NumBytes; 13371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), 13381d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength)); 1339e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff } 13401d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 134170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 13421d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 134370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 134470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 134570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 134670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 134770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 134870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 134970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 135070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 135170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 135270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 135370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 135470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 135570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 135670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 135770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 135870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 135970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1360434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1361434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1362434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 136370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 13641d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 136570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); 13661d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 13671d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 13681d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 13691d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 13701d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 13711d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 13721d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 13731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 137470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 137570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 13761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13771d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 13781d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 13791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13800032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 13810032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 13823e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 13831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13849d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1385c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1386c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 138796e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 13881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 13899d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 13903e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 13913e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 13923c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1393c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 13941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1395e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 13963e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 13971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::StructType *STy = 1398e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1399e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 14005add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 140144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1402c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 14035add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 14041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1405c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 14063e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 14071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 14085add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 14095add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1410c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 14110032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1412a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 1413a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar const char *Sect, *Prefix; 1414a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar bool isConstant; 141595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1416a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1417a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Prefix = getContext().Target.getUnicodeStringSymbolPrefix(); 1418a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Sect = getContext().Target.getUnicodeStringSection(); 141995b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner // FIXME: why do utf strings get "l" labels instead of "L" labels? 142095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1421a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar // FIXME: Why does GCC not set constant here? 1422a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar isConstant = false; 1423a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 142495b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Prefix = ".str"; 1425a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar Sect = getContext().Target.getCFStringDataSection(); 142695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::PrivateLinkage; 1427a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar // FIXME: -fwritable-strings should probably affect this, but we 1428a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar // are following gcc here. 1429a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar isConstant = true; 1430a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 14311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 14321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), C->getType(), isConstant, 143395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage, C, Prefix); 1434a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (Sect) 14358e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 1436a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1437a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar unsigned Align = getContext().getTypeAlign(getContext().ShortTy)/8; 14381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV->setAlignment(Align); 1439a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 14405add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 14415add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1442c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1443c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 14445add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 14451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1446c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 144708e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 14481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 14491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 145095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 14518e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 14528e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 14531d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 14541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14550c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1456c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 145745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 14586143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 14591e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 14606143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 14611e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const char *StrData = E->getStrData(); 14621e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar unsigned Len = E->getByteLength(); 14631e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 14641e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 14651e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar getContext().getAsConstantArrayType(E->getType()); 14661e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 14671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1468dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 14691e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar std::string Str(StrData, StrData+Len); 14701e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 14711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1472dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 1473dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner RealLen *= getContext().Target.getWCharWidth()/8; 14741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14751e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 14761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14771e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 14781e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 14791e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 14806143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 14816143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 14826143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 14836143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 14846143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 14856143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar return GetAddrOfConstantString(GetStringForStringLiteral(S)); 14866143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 14876143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1488eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1489eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1490eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1491eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1492eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1493eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1494a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1495a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1496eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1497eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1498eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1499a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 15001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 150145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 15025fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 15035fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 15046143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 15050032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 15060032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 15071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 150845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 15091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 151095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, 15111c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson C, GlobalName); 151245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 151345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 15146143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 15156143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 15166143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 15176143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 15186143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 15196143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 15206143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 15216143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 15225fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, 15235fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 15248e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 15258e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 15268e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 15278e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 152895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 15298e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 15308e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 15318e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 15325fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar return GenerateStringLiteral(str, false, *this, GlobalName); 15331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StringMapEntry<llvm::Constant *> &Entry = 153595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 153645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 153745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1538eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 153945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 154045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 15415fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); 154245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 154345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 154445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 15456143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 15466143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 15476143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 15486143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 15495fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, 15505fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 1551c9f29c61856ffb5f643cedbe87ac076f21a1381aChris Lattner return GetAddrOfConstantString(str + '\0', GlobalName); 15526143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 155341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1554af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1555af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 15561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 1557af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 15581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 155917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 1560af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 15611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1562af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1563af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1564af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1565af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1566af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1567af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1568af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1569af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1570af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 157117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 1572fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1573fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1574af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 157517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 1576fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1577fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1578af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1579af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1580af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1581af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 158291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 1583984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 158417945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 1585984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 1586984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 1587984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 1588984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 158991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 159091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 1591f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 1592f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 159391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 159491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 159591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 159691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 159717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 159891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 159991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 160091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 160191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 160241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 160341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 160441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 160541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 160641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 160741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 160841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 160941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 161016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 161116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 161216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 16131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 161441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 1615293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 16162b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 161741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 161816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 161916e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 162016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 16211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1622555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 1623555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 1624555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 162541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 1626555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 162741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 162841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 162995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 163041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 1631984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 163241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 16339cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 16349cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 1635dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 1636127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 1637127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 16389cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 163995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 164095d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 164195d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 164227ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 164327ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 164427ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 164536674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 164636674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 164736674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 164836674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 164936674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 165095d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 16511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 165238e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 165341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 165441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 1655b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCCategory: 1656b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 165741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1658285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 165941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 1660b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 166141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 166241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 166341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 1664af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 1665af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 166641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 166741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 166841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1669af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 1670af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 1671af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 1672af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 167341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 16741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 167541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 167641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 167741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 16786fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 167941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 168041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 168141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 16821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 1683305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 168441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 168541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 168691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 168791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 168841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 168941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 169041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 169141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 169241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar std::string AsmString(AD->getAsmString()->getStrData(), 169341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar AD->getAsmString()->getByteLength()); 16941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 169541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 169641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 169741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 169841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 169941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(S + '\n' + AsmString); 170041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 170141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 17021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 1704f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 1705f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 1706f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 170741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 170841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 170941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 1710