CodeGenModule.cpp revision 7a536907da776bdc47a704e7cafd641e8150e653
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- CodeGenModule.cpp - Emit LLVM Code from ASTs for a Module --------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This coordinates the per-module state used while generating code. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenModule.h" 15bd3606426d389370616126af969904ec493cb105Chris Lattner#include "CGDebugInfo.h" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenFunction.h" 170dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar#include "CGCall.h" 18af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar#include "CGObjCRuntime.h" 195f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor#include "Mangle.h" 2082d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov#include "TargetInfo.h" 2106057cef0bcd7804e80f3ce2bbe352178396c715Chandler Carruth#include "clang/Frontend/CodeGenOptions.h" 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 23687cc4a850b59116efee061018f0d8df50728b82Ken Dyck#include "clang/AST/CharUnits.h" 24c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2521ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 26af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor#include "clang/AST/DeclTemplate.h" 271a5e0d7f18485e4fb958f96dcddff3e4486a4069Anders Carlsson#include "clang/AST/RecordLayout.h" 281b63e4f732dbc73d90abf886b4d21f8e3a165f6dChris Lattner#include "clang/Basic/Builtins.h" 292c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner#include "clang/Basic/Diagnostic.h" 308bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman#include "clang/Basic/SourceManager.h" 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 32e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff#include "clang/Basic/ConvertUTF.h" 33ec9426ca6039279bcc99bc2c625bb2abe4f0353dNate Begeman#include "llvm/CallingConv.h" 34bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner#include "llvm/Module.h" 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/Intrinsics.h" 36d5b8902c0329d80a216803b58dc3b689349a0c11Chris Lattner#include "llvm/LLVMContext.h" 376374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall#include "llvm/ADT/Triple.h" 3820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 396ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif#include "llvm/Support/CallSite.h" 4078f7ece00e2ddfb64d4ed72a7be770b5b9b805e3Chris Lattner#include "llvm/Support/ErrorHandling.h" 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 452811ccf48d6d898c42cc4cfad37abedb36236d20Chandler CarruthCodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, 46468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall llvm::Module &M, const llvm::TargetData &TD, 47468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall Diagnostic &diags) 48bd3606426d389370616126af969904ec493cb105Chris Lattner : BlockModule(C, M, TD, Types, *this), Context(C), 492811ccf48d6d898c42cc4cfad37abedb36236d20Chandler Carruth Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), 50468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags), 5182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov Types(C, M, TD, getTargetCodeGenInfo().getABIInfo()), 523a811f1f4286ee3fd0c563c1cfe623956f3caa24Charles Davis VTables(*this), Runtime(0), ABI(0), 53673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CFConstantStringClassRef(0), NSConstantStringClassRef(0), 54673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar VMContext(M.getContext()), 55754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl(0), NSConcreteStackBlockDecl(0), 56673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar NSConcreteGlobalBlock(0), NSConcreteStackBlock(0), 57754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl(0), BlockObjectDisposeDecl(0), 58673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar BlockObjectAssign(0), BlockObjectDispose(0){ 59208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar 603c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner if (!Features.ObjC1) 613c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = 0; 623c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (!Features.NeXTRuntime) 633c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateGNUObjCRuntime(*this); 643c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (Features.ObjCNonFragileABI) 653c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacNonFragileABIObjCRuntime(*this); 663c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else 673c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacObjCRuntime(*this); 68e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 693a811f1f4286ee3fd0c563c1cfe623956f3caa24Charles Davis if (!Features.CPlusPlus) 703a811f1f4286ee3fd0c563c1cfe623956f3caa24Charles Davis ABI = 0; 713a811f1f4286ee3fd0c563c1cfe623956f3caa24Charles Davis else createCXXABI(); 723a811f1f4286ee3fd0c563c1cfe623956f3caa24Charles Davis 73e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 7420f12a20ba9cfa6f8d53c8304e24f50903c45184Anders Carlsson DebugInfo = CodeGenOpts.DebugInfo ? new CGDebugInfo(*this) : 0; 752b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 762b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 772b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 78815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 793a811f1f4286ee3fd0c563c1cfe623956f3caa24Charles Davis delete ABI; 80815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 81815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 82815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 830d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnallvoid CodeGenModule::createObjCRuntime() { 840d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall if (!Features.NeXTRuntime) 850d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateGNUObjCRuntime(*this); 860d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else if (Features.ObjCNonFragileABI) 870d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateMacNonFragileABIObjCRuntime(*this); 880d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else 890d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateMacObjCRuntime(*this); 900d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall} 910d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall 923a811f1f4286ee3fd0c563c1cfe623956f3caa24Charles Davisvoid CodeGenModule::createCXXABI() { 9398b7c5c496dfccb39287b8f7d8f1444594936d10Charles Davis if (Context.Target.getCXXABI() == "microsoft") 9498b7c5c496dfccb39287b8f7d8f1444594936d10Charles Davis ABI = CreateMicrosoftCXXABI(*this); 9598b7c5c496dfccb39287b8f7d8f1444594936d10Charles Davis else 9698b7c5c496dfccb39287b8f7d8f1444594936d10Charles Davis ABI = CreateItaniumCXXABI(*this); 973a811f1f4286ee3fd0c563c1cfe623956f3caa24Charles Davis} 983a811f1f4286ee3fd0c563c1cfe623956f3caa24Charles Davis 99815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 10082227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 1016c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalInitFunc(); 102efb0fa9e11f75af51744a6159530ef7cc8efa24aDaniel Dunbar EmitCXXGlobalDtorFunc(); 103208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 104208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 105208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 1066bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 1076bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 108532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 1090269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 110744016dde06fcffd50931e94a98c850f8b12cd87John McCall 111744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (getCodeGenOpts().EmitDeclMetadata) 112744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitDeclMetadata(); 113f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 114f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 1156374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCallbool CodeGenModule::isTargetDarwin() const { 1166374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall return getContext().Target.getTriple().getOS() == llvm::Triple::Darwin; 1176374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall} 1186374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 119488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 1202c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 12190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 12290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 12390df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 12490df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 12656b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 1272c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 1280a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 1290a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 1302c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 13158c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 132488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 133c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 13490df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 13590df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 13690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 13790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 13956b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 140c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 1410a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 142c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 143c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 1441eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpLangOptions::VisibilityMode 14504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel DunbarCodeGenModule::getDeclVisibilityMode(const Decl *D) const { 14604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 14704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar if (VD->getStorageClass() == VarDecl::PrivateExtern) 14804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 14904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 15040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) { 15104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (attr->getVisibility()) { 15204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar default: assert(0 && "Unknown visibility!"); 1531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case VisibilityAttr::DefaultVisibility: 15404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Default; 15504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::HiddenVisibility: 15604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Hidden; 15704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case VisibilityAttr::ProtectedVisibility: 15804d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return LangOptions::Protected; 15904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar } 1607e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1617cf84d66965a7706004d8590b5af5fe54b85f525Douglas Gregor 162af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (getLangOptions().CPlusPlus) { 163af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor // Entities subject to an explicit instantiation declaration get default 164af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor // visibility. 165af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 166af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (Function->getTemplateSpecializationKind() 167af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor == TSK_ExplicitInstantiationDeclaration) 168af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor return LangOptions::Default; 169af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor } else if (const ClassTemplateSpecializationDecl *ClassSpec 170af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor = dyn_cast<ClassTemplateSpecializationDecl>(D)) { 171af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (ClassSpec->getSpecializationKind() 172af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor == TSK_ExplicitInstantiationDeclaration) 173af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor return LangOptions::Default; 174af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor } else if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) { 175af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (Record->getTemplateSpecializationKind() 176af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor == TSK_ExplicitInstantiationDeclaration) 177af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor return LangOptions::Default; 178af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor } else if (const VarDecl *Var = dyn_cast<VarDecl>(D)) { 179af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (Var->isStaticDataMember() && 180af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor (Var->getTemplateSpecializationKind() 181af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor == TSK_ExplicitInstantiationDeclaration)) 182af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor return LangOptions::Default; 183af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor } 184af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor 185af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor // If -fvisibility-inlines-hidden was provided, then inline C++ member 186af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor // functions get "hidden" visibility by default. 187af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (getLangOptions().InlineVisibilityHidden) 188af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) 189af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor if (Method->isInlined()) 190af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor return LangOptions::Hidden; 191af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor } 192af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor 193aa8b0d19244a6e7e8e5798fcc6aef003c274d3e0Eli Friedman // If this decl is contained in a class, it should have the same visibility 194aa8b0d19244a6e7e8e5798fcc6aef003c274d3e0Eli Friedman // as the parent class. 19539de84d671bac60662251e98f20a5a6039795dfcAnders Carlsson if (const DeclContext *DC = D->getDeclContext()) 196aa8b0d19244a6e7e8e5798fcc6aef003c274d3e0Eli Friedman if (DC->isRecord()) 197aa8b0d19244a6e7e8e5798fcc6aef003c274d3e0Eli Friedman return getDeclVisibilityMode(cast<Decl>(DC)); 19839de84d671bac60662251e98f20a5a6039795dfcAnders Carlsson 19904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return getLangOptions().getVisibilityMode(); 2004f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman} 2014f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman 2021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 20304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar const Decl *D) const { 20404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 205df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 2067e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 2076ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 2087e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 2096ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 21004d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar switch (getDeclVisibilityMode(D)) { 2117cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian default: assert(0 && "Unknown visibility!"); 21204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Default: 21304d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 21404d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Hidden: 21504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 21604d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar case LangOptions::Protected: 21704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar return GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); 2187cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian } 2197cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 2207cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 221cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// Set the symbol visibility of type information (vtable and RTTI) 222cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// associated with the given type. 223cbfe50224b19119e759802bd0c1463269dffd09eJohn McCallvoid CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV, 224cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall const CXXRecordDecl *RD, 225cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall bool IsForRTTI) const { 226cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall setGlobalVisibility(GV, RD); 227cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 228cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We want to drop the visibility to hidden for weak type symbols. 229cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // This isn't possible if there might be unresolved references 230cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // elsewhere that rely on this symbol being visible. 231cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2327a536907da776bdc47a704e7cafd641e8150e653John McCall // This should be kept roughly in sync with setThunkVisibility 2337a536907da776bdc47a704e7cafd641e8150e653John McCall // in CGVTables.cpp. 2347a536907da776bdc47a704e7cafd641e8150e653John McCall 235cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Preconditions. 236cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (GV->getLinkage() != llvm::GlobalVariable::WeakODRLinkage || 237cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->getVisibility() != llvm::GlobalVariable::DefaultVisibility) 238cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 239cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 240cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Don't override an explicit visibility attribute. 241cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (RD->hasAttr<VisibilityAttr>()) 242cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 243cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 244cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall switch (RD->getTemplateSpecializationKind()) { 245cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We have to disable the optimization if this is an EI definition 246cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // because there might be EI declarations in other shared objects. 247cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDefinition: 248cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDeclaration: 249cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 250cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2517a536907da776bdc47a704e7cafd641e8150e653John McCall // Every use of a non-template class's type information has to emit it. 252cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_Undeclared: 253cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 254cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2557a536907da776bdc47a704e7cafd641e8150e653John McCall // In theory, implicit instantiations can ignore the possibility of 2567a536907da776bdc47a704e7cafd641e8150e653John McCall // an explicit instantiation declaration because there necessarily 2577a536907da776bdc47a704e7cafd641e8150e653John McCall // must be an EI definition somewhere with default visibility. In 2587a536907da776bdc47a704e7cafd641e8150e653John McCall // practice, it's possible to have an explicit instantiation for 2597a536907da776bdc47a704e7cafd641e8150e653John McCall // an arbitrary template class, and linkers aren't necessarily able 2607a536907da776bdc47a704e7cafd641e8150e653John McCall // to deal with mixed-visibility symbols. 2617a536907da776bdc47a704e7cafd641e8150e653John McCall case TSK_ExplicitSpecialization: 262cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ImplicitInstantiation: 2637a536907da776bdc47a704e7cafd641e8150e653John McCall if (!CodeGenOpts.EmitWeakTemplatesHidden) 2647a536907da776bdc47a704e7cafd641e8150e653John McCall return; 265cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 266cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall } 267cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 268cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // If there's a key function, there may be translation units 269cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // that don't have the key function's definition. But ignore 270cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // this if we're emitting RTTI under -fno-rtti. 271cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (!IsForRTTI || Features.RTTI) 272cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (Context.getKeyFunction(RD)) 273cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 274cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 275cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Otherwise, drop the visibility to hidden. 276cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 277cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall} 278cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 279793a990774826a0c20b0da66cec0991badfb8b63Anders Carlssonllvm::StringRef CodeGenModule::getMangledName(GlobalDecl GD) { 280793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 281793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 282793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; 283793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (!Str.empty()) 284793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 285793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 286793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (!getMangleContext().shouldMangleDeclName(ND)) { 287793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson IdentifierInfo *II = ND->getIdentifier(); 288793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson assert(II && "Attempt to mangle unnamed decl."); 289793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 290793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = II->getName(); 291793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 292793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson } 293793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 294793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::SmallString<256> Buffer; 295793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 296793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Buffer); 297793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 298793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Buffer); 299793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const BlockDecl *BD = dyn_cast<BlockDecl>(ND)) 300564360be450b319aeafc26698be9811837bfb826Fariborz Jahanian getMangleContext().mangleBlock(GD, BD, Buffer); 301793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else 302793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson getMangleContext().mangleName(ND, Buffer); 303793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 304793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson // Allocate space for the mangled name. 305793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson size_t Length = Buffer.size(); 306793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson char *Name = MangledNamesAllocator.Allocate<char>(Length); 307793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson std::copy(Buffer.begin(), Buffer.end(), Name); 308793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 309793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = llvm::StringRef(Name, Length); 310793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 311793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 312793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson} 313793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 314564360be450b319aeafc26698be9811837bfb826Fariborz Jahanianvoid CodeGenModule::getMangledName(GlobalDecl GD, MangleBuffer &Buffer, 315564360be450b319aeafc26698be9811837bfb826Fariborz Jahanian const BlockDecl *BD) { 316564360be450b319aeafc26698be9811837bfb826Fariborz Jahanian getMangleContext().mangleBlock(GD, BD, Buffer.getBuffer()); 3179a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson} 3189a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson 319f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::GlobalValue *CodeGenModule::GetGlobalValue(llvm::StringRef Name) { 320f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return getModule().getNamedValue(Name); 3215f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 3225f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 3236d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 3246d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 3256bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 32649988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3276bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 3286d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3296d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 3306bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 3316bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 3326bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 33349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3346bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 3356bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 3366bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3376bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 3386bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 3396bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 3401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 3416bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<const llvm::Type*>(), 3426bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar false); 34396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 3446bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3456bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 3461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType* CtorStructTy = 3471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), 34896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 3496bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3506bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 3516bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 3526bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 3536bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 3541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 3550032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 3563c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 35708e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 3586bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 3596bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3606bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 36196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 3621c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 363572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 3647db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 3651c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 3666d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 3676d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3686d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 369532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 370532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 371532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 372532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 373532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 374532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 37596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 376532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 377532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 3781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *gv = 3791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(TheModule, Array->getType(), false, 3801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::AppendingLinkage, Array, 3811c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.global.annotations"); 382532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 383532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 384532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 385d46f98573ba104eda102dd3224b2dca69f1c6336John McCallllvm::GlobalValue::LinkageTypes 386d46f98573ba104eda102dd3224b2dca69f1c6336John McCallCodeGenModule::getFunctionLinkage(const FunctionDecl *D) { 38790e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); 3887c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 389f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_Internal) 390d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::InternalLinkage; 391f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 392f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<DLLExportAttr>()) 393d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::DLLExportLinkage; 394f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 395f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<WeakAttr>()) 396d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::WeakAnyLinkage; 397f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 398f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 399f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition somewhere else, so we can use available_externally linkage. 400f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_C99Inline) 401d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::AvailableExternallyLinkage; 402f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 403f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C++, the compiler has to emit a definition in every translation unit 404f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // that references the function. We should use linkonce_odr because 405f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // a) if all references in this translation unit are optimized away, we 406f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 407f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 408f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition is dependable. 409f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 410d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::LinkOnceODRLinkage; 411f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 412f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // An explicit instantiation of a template has weak linkage, since 413f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // explicit instantiations can occur in multiple translation units 414f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // and must all be equivalent. However, we are not allowed to 415f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // throw away these explicit instantiations. 416f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_ExplicitTemplateInstantiation) 4178f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor return llvm::Function::WeakODRLinkage; 418f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 419f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // Otherwise, we have strong external linkage. 420f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner assert(Linkage == GVA_StrongExternal); 421f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner return llvm::Function::ExternalLinkage; 422d46f98573ba104eda102dd3224b2dca69f1c6336John McCall} 423d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 424d46f98573ba104eda102dd3224b2dca69f1c6336John McCall 425d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// SetFunctionDefinitionAttributes - Set attributes for a global. 426d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// 427d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// FIXME: This is currently only done for aliases and functions, but not for 428d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// variables (these details are set in EmitGlobalVarDefinition for variables). 429d46f98573ba104eda102dd3224b2dca69f1c6336John McCallvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 430d46f98573ba104eda102dd3224b2dca69f1c6336John McCall llvm::GlobalValue *GV) { 4317c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 432d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 433d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 4347dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 4351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 4367dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 437ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 438761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 439ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 440761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 441ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 442ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 443f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 444f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4457c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 4467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 44774ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 4481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 449af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 45040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<AlwaysInlineAttr>()) 451af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 4521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4531feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 45481ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 455f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 456fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson if (Features.getStackProtectorMode() == LangOptions::SSPOn) 457fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 458fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson else if (Features.getStackProtectorMode() == LangOptions::SSPReq) 459fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 460fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 461bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) { 462bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt unsigned width = Context.Target.getCharWidth(); 463bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt F->setAlignment(AA->getAlignment() / width); 464bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt while ((AA = AA->getNext<AlignedAttr>())) 465bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt F->setAlignment(std::max(F->getAlignment(), AA->getAlignment() / width)); 466bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt } 467fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 468bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 469bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 470f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 471f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 4737c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 4747c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar setGlobalVisibility(GV, D); 4757c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 47640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 4777c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 4787c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 47940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 4807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 48182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 48282d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); 4837c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 4847c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4850e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 4860e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 4870e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 4880e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 4890e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 4907c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4917c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 4927c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4930e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 494f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 495f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 496b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlssonvoid CodeGenModule::SetFunctionAttributes(GlobalDecl GD, 497c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 498c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 499b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); 500b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson 501c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 502b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); 5031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5047c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 5057c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 5061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 50740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 5087c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 5091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 51040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<WeakImportAttr>()) { 5117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 5121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 5137c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 5147c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 5151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 5167c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 5177c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 51840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 5197c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 520219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 521219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 5220269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 5231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 5240269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 52535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 5260269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5270269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5280269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 5290269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 530ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 5310269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 5320269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5333c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 5341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 53535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 53635f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 53735f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 53835f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 5391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 5401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 541a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 54235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 5431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 544c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 545c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 54696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 5471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 5491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 5500269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 5517db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 5521c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 5530269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5540269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 5550269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5560269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5570269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 55867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 55967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 56067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 561bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 562046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson while (!DeferredDeclsToEmit.empty() || !DeferredVTables.empty()) { 563046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson if (!DeferredVTables.empty()) { 564046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson const CXXRecordDecl *RD = DeferredVTables.back(); 565046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson DeferredVTables.pop_back(); 566046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson getVTables().GenerateClassData(getVTableLinkage(RD), RD); 567bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola continue; 568bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola } 569bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 5702a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 57167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 57267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 573c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // Check to see if we've already emitted this. This is necessary 574c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // for a couple of reasons: first, decls can end up in the 575c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // deferred-decls queue multiple times, and second, decls can end 576c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // up with definitions in unusual ways (e.g. by an extern inline 577c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // function acquiring a strong function redefinition). Just 578c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // ignore these cases. 579c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // 580c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // TODO: That said, looking this up multiple times is very wasteful. 5819a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef Name = getMangledName(D); 582f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *CGRef = GetGlobalValue(Name); 58367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 5841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 58567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 58667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 5871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 588c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // GlobalAlias::isDeclaration() defers to the aliasee, but for our 589c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // purposes an alias counts as a definition. 590c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall if (isa<llvm::GlobalAlias>(CGRef)) 591c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall continue; 592c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall 59367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 59467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 59567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 5998bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 6001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 6011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// GlobalValue being annotated. The second field is the constant string 6021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// created from the AnnotateAttr's annotation. The third field is a constant 6038bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 6048bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 6058bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6068bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 6078bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 6088bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 6108bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 6118bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 6128bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 6138bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6148bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 6158bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 6163c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); 6171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *anno = llvm::ConstantArray::get(VMContext, 6180032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson AA->getAnnotation(), true); 6190032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *unit = llvm::ConstantArray::get(VMContext, 6200032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson M->getModuleIdentifier(), 6218bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 6228bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6238bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 6248bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 6251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *annoGV = 62695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, anno->getType(), false, 62795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, anno, 62895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GV->getName()); 6298bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 6308bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 63195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, unit->getType(), false, 6321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::PrivateLinkage, unit, 63395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ".str"); 6348bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 63557d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 6368bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 6373c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, SBP), 6383c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(annoGV, SBP), 6393c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(unitGV, SBP), 6400032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) 6418bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 64247a434ff3d49e7906eda88e8e8242e4297725b32Owen Anderson return llvm::ConstantStruct::get(VMContext, Fields, 4, false); 6438bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 6448bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 645a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidisbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 64690e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis // Never defer when EmitAllDecls is specified. 64790e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis if (Features.EmitAllDecls) 648a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidis return false; 6490b6bc8bd7a1d2a7d7478d13d78cff94cacad61fcDouglas Gregor 6504ac7c0bb39696e92fd220118fedc484c09a69870Argyrios Kyrtzidis return !getContext().DeclMustBeEmitted(Global); 65173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 65273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 6536a836706c40a31c716952b74785102c90fd6afa7Rafael Espindolallvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { 6546a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const AliasAttr *AA = VD->getAttr<AliasAttr>(); 6556a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola assert(AA && "No alias?"); 6566a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6576a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); 6586a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6596a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // See if there is already something with the target's name in the module. 660f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); 6616a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6626a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::Constant *Aliasee; 6636a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (isa<llvm::FunctionType>(DeclTy)) 664f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl()); 6656a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola else 666f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 6676a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::PointerType::getUnqual(DeclTy), 0); 6686a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (!Entry) { 6696a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); 6706a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola F->setLinkage(llvm::Function::ExternalWeakLinkage); 6716a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.insert(F); 6726a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 6736a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6746a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return Aliasee; 6756a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola} 6766a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 677b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 6784a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 6791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6806a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // Weak references don't produce any output by themselves. 6816a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (Global->hasAttr<WeakRefAttr>()) 6826a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return; 6836a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 684bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 685bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 68640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 687f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return EmitAliasDefinition(GD); 688219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 68967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 6905e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 691754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (FD->getIdentifier()) { 692754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = FD->getName(); 693754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_Block_object_assign") { 694754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl = FD; 695754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_Block_object_dispose") { 696754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl = FD; 697754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 698754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 699754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 70073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 70173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 70273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7030269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 7040269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 705bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 706bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 707754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (VD->getIdentifier()) { 708754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = VD->getName(); 709754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_NSConcreteGlobalBlock") { 710754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl = VD; 711754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_NSConcreteStackBlock") { 712754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl = VD; 713754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 714754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 715754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 716754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 717a9a55c063e9e59c6ab0a6d7a21302660f7bde9f9Douglas Gregor if (VD->isThisDeclarationADefinition() != VarDecl::Definition) 71873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7194c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 7204c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 72167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 72267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 7234357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (!MayDeferGeneration(Global)) { 7244357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Emit the definition if it can't be deferred. 7254357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner EmitGlobalDefinition(GD); 726bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 727bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 728bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall 729bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // If we're deferring emission of a C++ variable with an 730bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer, remember the order in which it appeared in the file. 731bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus && isa<VarDecl>(Global) && 732bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall cast<VarDecl>(Global)->hasInit()) { 733bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); 734bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall CXXGlobalInits.push_back(0); 735bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } 7364357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 7374357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // If the value has already been used, add it directly to the 7384357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit list. 7399a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 7404357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (GetGlobalValue(MangledName)) 7414357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDeclsToEmit.push_back(GD); 7424357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner else { 7434357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 7444357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // first use of the mangled name will cause it to move into 7454357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit. 7464357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDecls[MangledName] = GD; 7474357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner } 7484c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 7494c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 750b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 7514a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 7521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 753cb421fa690da545b58a720abe5f1c49b166dbde7Dan Gohman PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), 7548e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 7558e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 7568e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 75744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 75844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // At -O0, don't generate IR for functions with available_externally 75944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // linkage. 7607feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor if (CodeGenOpts.OptimizationLevel == 0 && 7617feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor !Function->hasAttr<AlwaysInlineAttr>() && 76244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getFunctionLinkage(Function) 76344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor == llvm::Function::AvailableExternallyLinkage) 76444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return; 76544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor 76644eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { 76744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (Method->isVirtual()) 76844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getVTables().EmitThunks(GD); 7697270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson 77044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) 77144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return EmitCXXConstructor(CD, GD.getCtorType()); 7724357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 77344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(Method)) 77444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return EmitCXXDestructor(DD, GD.getDtorType()); 77544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 776b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 777b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalFunctionDefinition(GD); 77844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 779b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 780b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 781b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalVarDefinition(VD); 7824357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 7834357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner assert(0 && "Invalid argument to EmitGlobalDefinition()"); 784bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 785bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 78674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 78774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 78874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 78974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 79074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 79174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 79274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 793f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 794f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMFunction(llvm::StringRef MangledName, 795f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *Ty, 796f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GlobalDecl D) { 7970558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 798f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 7990558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 8006a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 8016a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); 8026a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (FD && !FD->hasAttr<WeakAttr>()) 8037270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 8046a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8056a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 8066a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 8076a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8080558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 8090558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 8101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8110558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 81296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 8133c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, PTy); 8140558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 8151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 816654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 817654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 818654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 819654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 820784f21121a6c9418ebd86baa6814e36e1176c410John McCall 821784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::FunctionType *FTy; 822784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (isa<llvm::FunctionType>(Ty)) { 823784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = cast<llvm::FunctionType>(Ty); 824784f21121a6c9418ebd86baa6814e36e1176c410John McCall } else { 825784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 826784f21121a6c9418ebd86baa6814e36e1176c410John McCall std::vector<const llvm::Type*>(), false); 827654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 828654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 829bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 830784f21121a6c9418ebd86baa6814e36e1176c410John McCall llvm::Function *F = llvm::Function::Create(FTy, 831654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 832f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall MangledName, &getModule()); 833f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(F->getName() == MangledName && "name was uniqued!"); 834654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 835b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetFunctionAttributes(D, F, IsIncompleteFunction); 836654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 83767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 83867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 83967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 840f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 84167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 84267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 84367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 84467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 84567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 846b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner } else if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl())) { 8470c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // If this the first reference to a C++ inline function in a class, queue up 8480c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // the deferred function body for emission. These are not seen as 8490c337ed63ff0f04fd8315afabb2d7a51969fdc97Chris Lattner // top-level declarations. 850b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner if (FD->isThisDeclarationADefinition() && MayDeferGeneration(FD)) 851b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner DeferredDeclsToEmit.push_back(D); 852c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian // A called constructor which has no definition or declaration need be 853c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian // synthesized. 854c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(FD)) { 8557b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola if (CD->isImplicit()) { 856d3a344c55b89bad933c04ac59650f7afb95423e9Benjamin Kramer assert(CD->isUsed() && "Sema doesn't consider constructor as used."); 85715233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman DeferredDeclsToEmit.push_back(D); 8587b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 85915233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman } else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(FD)) { 8607b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola if (DD->isImplicit()) { 861d3a344c55b89bad933c04ac59650f7afb95423e9Benjamin Kramer assert(DD->isUsed() && "Sema doesn't consider destructor as used."); 86215233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman DeferredDeclsToEmit.push_back(D); 8637b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 86415233e5a4d98b66b3c6cfcc4e6413ad776a79481Eli Friedman } else if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 8657b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola if (MD->isCopyAssignment() && MD->isImplicit()) { 866d3a344c55b89bad933c04ac59650f7afb95423e9Benjamin Kramer assert(MD->isUsed() && "Sema doesn't consider CopyAssignment as used."); 867c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian DeferredDeclsToEmit.push_back(D); 8687b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 869c7ff8e19081c2e974f05f66c4fa9b40750fc655fFariborz Jahanian } 87067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 8711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 872784f21121a6c9418ebd86baa6814e36e1176c410John McCall // Make sure the result is of the requested type. 873784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (!IsIncompleteFunction) { 874784f21121a6c9418ebd86baa6814e36e1176c410John McCall assert(F->getType()->getElementType() == Ty); 875784f21121a6c9418ebd86baa6814e36e1176c410John McCall return F; 876784f21121a6c9418ebd86baa6814e36e1176c410John McCall } 877784f21121a6c9418ebd86baa6814e36e1176c410John McCall 878784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 879784f21121a6c9418ebd86baa6814e36e1176c410John McCall return llvm::ConstantExpr::getBitCast(F, PTy); 8800558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 8810558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 88274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 88374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 88474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 885b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 88674391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 88774391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 88874391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 8894a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 890bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 8919a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 892f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMFunction(MangledName, Ty, GD); 89374391b48b4791cded373683a3baf67314f358d50Chris Lattner} 89477ba708819285931932ecd33691a672bb59d221aEli Friedman 89574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 89674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 89774391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 89874391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 899f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 900b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); 90174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 902bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 90320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedmanstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D) { 90488786862424cb2d478516d911709dc19c962af9cJohn McCall if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) 90520e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 90620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman if (Context.getLangOptions().CPlusPlus && 90720e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman Context.getBaseElementType(D->getType())->getAs<RecordType>()) { 90820e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman // FIXME: We should do something fancier here! 90920e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 91020e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 91120e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 91220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 91320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 91474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 91574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 91674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 91774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 91874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 91974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 92074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 921f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 922f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMGlobal(llvm::StringRef MangledName, 923f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::PointerType *Ty, 924f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const VarDecl *D) { 9253c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 926f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 92799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 9286a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 9296a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (D && !D->hasAttr<WeakAttr>()) 9307270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 9316a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 9326a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 9336a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 9346a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 93574391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 936570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 9371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 93899b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 9393c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 94099b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 9411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 94267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 94367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 94467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 945f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 94667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 94767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 94867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 94967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 95067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 95167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 9521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 9541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 95599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 956f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 0, MangledName, 0, 95756ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 95849988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 95999b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 96074391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 961f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 962f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 96320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman GV->setConstant(DeclIsConstantGlobal(Context, D)); 96449988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 96574391b48b4791cded373683a3baf67314f358d50Chris Lattner // FIXME: Merge with other attribute handling code. 96674391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D->getStorageClass() == VarDecl::PrivateExtern) 96704d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 96849988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 9691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (D->hasAttr<WeakAttr>() || 97040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) 97174391b48b4791cded373683a3baf67314f358d50Chris Lattner GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 97256ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 97356ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 97474391b48b4791cded373683a3baf67314f358d50Chris Lattner } 9751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 976f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GV; 97774391b48b4791cded373683a3baf67314f358d50Chris Lattner} 978eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 979eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 98074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 98174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 98274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 98374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 98474391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 98574391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 98674391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 98774391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 98874391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 98974391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 9901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::PointerType *PTy = 99296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 993f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 9949a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 995f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMGlobal(MangledName, PTy, D); 99674391b48b4791cded373683a3baf67314f358d50Chris Lattner} 9973f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 99874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 99974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 100074391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 100174391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 1002f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 100396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0); 1004bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1005bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 100603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 100703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 100803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 10097520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 10107520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 10117520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 10127520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 10139a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1014f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (!GetGlobalValue(MangledName)) { 1015555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 101603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 10177520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 10187520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 10197520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 10207520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 102103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 102203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 102303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 10246fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregorvoid CodeGenModule::EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired) { 10256fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor if (DefinitionRequired) 10266fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor getVTables().GenerateClassData(getVTableLinkage(Class), Class); 10276fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor} 10286fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor 10294b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregorllvm::GlobalVariable::LinkageTypes 1030046c294a43024874ff35656c6e785b64e72f1f36Anders CarlssonCodeGenModule::getVTableLinkage(const CXXRecordDecl *RD) { 1031dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (RD->isInAnonymousNamespace() || !RD->hasLinkage()) 1032dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::InternalLinkage; 1033dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1034dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (const CXXMethodDecl *KeyFunction 1035dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor = RD->getASTContext().getKeyFunction(RD)) { 1036dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // If this class has a key function, use that to determine the linkage of 1037dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // the vtable. 10384b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor const FunctionDecl *Def = 0; 103906a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (KeyFunction->hasBody(Def)) 10404b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor KeyFunction = cast<CXXMethodDecl>(Def); 1041dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 10424b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor switch (KeyFunction->getTemplateSpecializationKind()) { 10434b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_Undeclared: 10444b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitSpecialization: 10454b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->isInlined()) 10464b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10474b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10484b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::ExternalLinkage; 10494b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10504b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ImplicitInstantiation: 10514b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDefinition: 10524b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10534b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10544b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 10554b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // FIXME: Use available_externally linkage. However, this currently 10564b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // breaks LLVM's build due to undefined symbols. 10574b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 10584b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10594b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 1060dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor } 1061dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1062dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor switch (RD->getTemplateSpecializationKind()) { 1063dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_Undeclared: 1064dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitSpecialization: 1065dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ImplicitInstantiation: 1066dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitInstantiationDefinition: 1067dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 1068dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1069dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitInstantiationDeclaration: 1070dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // FIXME: Use available_externally linkage. However, this currently 1071dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // breaks LLVM's build due to undefined symbols. 1072dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 10734b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10744b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 10754b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10764b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // Silence GCC warning. 10774b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10784b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor} 10794b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 1080687cc4a850b59116efee061018f0d8df50728b82Ken DyckCharUnits CodeGenModule::GetTargetTypeStoreSize(const llvm::Type *Ty) const { 1081687cc4a850b59116efee061018f0d8df50728b82Ken Dyck return CharUnits::fromQuantity( 1082687cc4a850b59116efee061018f0d8df50728b82Ken Dyck TheTargetData.getTypeStoreSizeInBits(Ty) / Context.getCharWidth()); 1083687cc4a850b59116efee061018f0d8df50728b82Ken Dyck} 1084687cc4a850b59116efee061018f0d8df50728b82Ken Dyck 1085bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 10868f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 108777ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 10886c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman bool NonConstInit = false; 10891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 109031310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl const Expr *InitExpr = D->getAnyInitializer(); 10913bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson 10923bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson if (!InitExpr) { 1093cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 109403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 109503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 109603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 109703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 109803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 109903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 110003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 110103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 110203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 1103b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 110477ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 1105c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor Init = EmitConstantExpr(InitExpr, D->getType()); 11066e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 11073bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson QualType T = InitExpr->getType(); 1108c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor if (D->getType()->isReferenceType()) 1109c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor T = D->getType(); 1110c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor 111189ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 11126c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalVarDeclInitFunc(D); 111389ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 11146c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman NonConstInit = true; 111589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 111689ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 111789ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 111889ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 1119bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } else { 1120bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // We don't need an initializer, so remove the entry for the delayed 1121bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer position (just in case this entry was delayed). 1122bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus) 1123bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition.erase(D); 11246e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 11258f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 11268e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 11272d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 1128570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 11291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1130570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 1131570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 11329d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 11339d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 11349d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 1135570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 1136570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 11371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1138570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 1139570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 11401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1141570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 1142570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 1143570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 1144570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 1145570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 1146570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 1147570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 1148570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 1149570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 1150570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 1151570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 1152570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { 11531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1154f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // Move the old entry aside so that we'll create a new one. 1155f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Entry->setName(llvm::StringRef()); 1156232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 1157570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 1158570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 11590558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 116077ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 11611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 11623c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 1163570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 116477ba708819285931932ecd33691a672bb59d221aEli Friedman 116577ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 1166570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 116777ba708819285931932ecd33691a672bb59d221aEli Friedman } 116877ba708819285931932ecd33691a672bb59d221aEli Friedman 116940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 11708bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 11718bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 1172f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 11738bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 11748bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 117588a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 1176e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 1177e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 1178e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 11796c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman if (!NonConstInit && DeclIsConstantGlobal(Context, D)) 1180e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 11811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11828b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); 118308d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman 118488a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 118590e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); 1186a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 11878fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 118840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1189ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLImportLinkage); 119040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1191ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLExportLinkage); 1192e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1193e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1194e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setLinkage(llvm::GlobalVariable::WeakODRLinkage); 1195e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1196e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 11978f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor } else if (Linkage == GVA_TemplateInstantiation || 11988f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor Linkage == GVA_ExplicitTemplateInstantiation) 11998f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor // FIXME: It seems like we can provide more specific linkage here 12008f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor // (LinkOnceODR, WeakODR). 12011028c9f0afc1cc5f4951b39b7067fa57c1fea07bDouglas Gregor GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 12021bc5c03a7f08b04f4ac26abd705418aaf4109062Daniel Dunbar else if (!getLangOptions().CPlusPlus && !CodeGenOpts.NoCommon && 1203309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 1204e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner !D->getAttr<SectionAttr>()) { 120504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::CommonLinkage); 1206e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // common vars aren't constant even if declared const. 1207e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 1208e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner } else 120904d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); 12107e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar 12117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 121204d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar 1213686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta // Emit global variable debug information. 12142d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner if (CGDebugInfo *DI = getDebugInfo()) { 121566031a5594bc9a7dc0dc5137c3e7955f835e4639Daniel Dunbar DI->setLocation(D->getLocation()); 1216686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta DI->EmitGlobalVariable(GV, D); 1217686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 121888a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 12195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1220bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1221bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1222bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1223bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1224bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1225bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1226bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1227bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1228bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1229bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1230bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1231bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1232bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1233bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 12341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1235bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 1236bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 1237bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1238bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1239dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer UI != E; ) { 1240bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 1241dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::Value::use_iterator I = UI++; // Increment before the CI is erased. 1242dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*I); 12438670cd3ea4dfbf86caacd270ec2441e9949bbb6aGabor Greif if (!CI) continue; // FIXME: when we allow Invoke, just do CallSite CS(*I) 124435db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif llvm::CallSite CS(CI); 1245dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer if (!CI || !CS.isCallee(I)) continue; 12461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1247bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1248bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1249bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1250bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1251bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1252bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1253bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1254bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1255bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1256bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1257bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1258bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 125935db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif if (CS.arg_size() == ArgNo || 126035db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif CS.getArgument(ArgNo)->getType() != AI->getType()) { 1261bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1262bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1263bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1264bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1265bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1266bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 12671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1268bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1269bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 12706ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif ArgList.append(CS.arg_begin(), CS.arg_begin() + ArgNo); 1271bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 1272bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 1273bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1274ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1275bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 1276bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 1277ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1278bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1279bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 128000549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 128100549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 12823b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1283c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner // Copy debug location attached to CI. 1284c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner if (!CI->getDebugLoc().isUnknown()) 1285c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner NewCall->setDebugLoc(CI->getDebugLoc()); 1286bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1287bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1288bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1289bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1290bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1291b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 1292b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 1293c0bf462cf35fe050bddbd8bff967298e4a67e79dJohn McCall const llvm::FunctionType *Ty = getTypes().GetFunctionType(GD); 12944819ac44c0e5222ebfe8e199c51f653f52177336Fariborz Jahanian getMangleContext().mangleInitDiscriminator(); 12959fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1296b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 12971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12980558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 12990558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 13000558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 13010558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 13020558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 13031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13050558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1306bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 13071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 130842745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1309bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 13100558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 131134809507232bc4c3c4840c7d092c7440219fddafChris Lattner 131262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 131362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 131462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 131562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 131662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 131762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 1318f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // (e.g. "int f(int x)"). Move the old function aside so that it 1319f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // doesn't interfere with GetAddrOfFunction. 1320f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall OldFn->setName(llvm::StringRef()); 1321b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 13221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1323bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1324bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1325bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 13269fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1327bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 13289fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 13299fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 13301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 133162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1332bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 13331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 13343c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1335bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1336bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 13371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 133862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1339bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 13401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13410558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1342bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 13431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13440558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 13458b2423361648c39a7d8a3c5e8129e12006deac32John McCall setFunctionLinkage(D, Fn); 1346bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1347219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 13486379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 13497c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 13507c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 13511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 135240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1353219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 135440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1355219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1356bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1357bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1358f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallvoid CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { 1359f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 136040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1361bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1362bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 13639a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 1364f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1365f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // If there is a definition in the module, then it wins over the alias. 1366f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // This is dubious, but allow it to be safe. Just ignore the alias. 1367f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 1368f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (Entry && !Entry->isDeclaration()) 1369f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return; 13701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1371f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1372bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1373bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1374bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1375bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1376bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 1377f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl()); 1378bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1379f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 138096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1381bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1382bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 13831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1384bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1385bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1386bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 13871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1388bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1389f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(Entry->isDeclaration()); 1390f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1391bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1392bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1393bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1394bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1395bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1396bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1397bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1398f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GA->takeName(Entry); 13991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14003c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1401bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1402bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1403f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall } else { 14049a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson GA->setName(MangledName); 1405bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 14061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14077c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 14087c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 14097c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 141040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 14117c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 14127c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 141306a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (FD->hasBody()) 14147c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 14157c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 14167c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 14177c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 14181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 141911e8ce7380856abee188b237c2600272df2ed09dRafael Espindola D->hasAttr<WeakRefAttr>() || 142040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) { 14217c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 14227c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 14237c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 14247c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1425bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1426bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1427b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1428b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 142934771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbarllvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, 143034771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar unsigned BuiltinID) { 14313e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 14321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 14333e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 14341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14353e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 14363e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 14373e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 14383e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 14391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::FunctionType *Ty = 1441386ca78d0b03b1fb519e60d1a14cd12a220364a6Eli Friedman cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); 1442bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 144334771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD)); 1444bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1445bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 14467acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 14477acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 14487acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 14497acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 14507acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1451bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 14523ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 14533ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wangllvm::Function *CodeGenModule::getMemCpyFn(const llvm::Type *DestType, 14543ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *SrcType, 14553ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *SizeType) { 14563ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *ArgTypes[3] = {DestType, SrcType, SizeType }; 14573ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang return getIntrinsic(llvm::Intrinsic::memcpy, ArgTypes, 3); 14585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1459c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 14603ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wangllvm::Function *CodeGenModule::getMemMoveFn(const llvm::Type *DestType, 14613ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *SrcType, 14623ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *SizeType) { 14633ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *ArgTypes[3] = {DestType, SrcType, SizeType }; 14643ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang return getIntrinsic(llvm::Intrinsic::memmove, ArgTypes, 3); 14650c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman} 14660c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman 14673ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wangllvm::Function *CodeGenModule::getMemSetFn(const llvm::Type *DestType, 14683ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *SizeType) { 14693ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *ArgTypes[2] = { DestType, SizeType }; 14703ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang return getIntrinsic(llvm::Intrinsic::memset, ArgTypes, 2); 147141ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio} 14727acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner 14731d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 14741d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 14751d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 147670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 14771d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 14781d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 1479df4eee9b035cc4b95b1ea72635e7429d06b0ecc8Daniel Dunbar unsigned NumBytes = Literal->getByteLength(); 14801d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1481f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1482f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1483f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 1484f015b034159d40e7033309e50036804eb1971787Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), 1485f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength)); 1486f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1487f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 14881d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 14891d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); 14901d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const UTF8 *FromPtr = (UTF8 *)Literal->getStrData(); 14911d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 14921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ConversionResult Result = ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 14941d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar &ToPtr, ToPtr + NumBytes, 14951d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar strictConversion); 14961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14971d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Check for conversion failure. 14981d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (Result != conversionOK) { 14991d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // FIXME: Have Sema::CheckObjCString() validate the UTF-8 string and remove 15001d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // this duplicate code. 15011d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar assert(Result == sourceIllegal && "UTF-8 to UTF-16 conversion failed"); 1502f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 1503f015b034159d40e7033309e50036804eb1971787Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(Literal->getStrData(), 1504f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength)); 1505e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff } 15061d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 150770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 15081d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 150970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 151070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 151170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 151270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 151370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 151470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 151570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 151670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 151770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 151870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 151970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 152070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 152170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 152270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 152370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 152470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 152570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1526434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1527434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1528434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 152970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 15301d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 153170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); 15321d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 15331d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 15341d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 15351d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 15361d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 15371d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 15381d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 15391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 154070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 154170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 15421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15431d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 15441d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 15451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15460032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 15470032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 15483e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 15491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15509d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1551c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1552c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 155396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 15541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 15559d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 15563e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 15573e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 15583c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1559c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 15601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1561e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 15623e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 15631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::StructType *STy = 1564e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1565e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 15665add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 156744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1568c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 15695add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 15701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1571c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 15723e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 15731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 15745add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 15755add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1576c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 15770032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1578a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 157995b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1580278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner bool isConstant; 1581a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1582278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 158395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1584278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // Note: -fwritable-strings doesn't make unicode CFStrings writable, but 1585278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // does make plain ascii ones writable. 1586278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = true; 1587a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 158895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::PrivateLinkage; 1589278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = !Features.WritableStrings; 1590a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1591278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 15921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 1593278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 1594278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner ".str"); 1595a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 15964da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 15974da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck GV->setAlignment(Align.getQuantity()); 1598a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 15995add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 16005add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1601c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1602c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 16035add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 16041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1605c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 160608e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 16071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 16081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 160995b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 16108e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 16118e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 16121d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 16131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16140c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1615c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 161645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 161733e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanianllvm::Constant * 161833e982bf782d851bfe5767acb1336fcf3419ac6bFariborz JahanianCodeGenModule::GetAddrOfConstantNSString(const StringLiteral *Literal) { 16192bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian unsigned StringLength = 0; 16202bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isUTF16 = false; 16212bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::StringMapEntry<llvm::Constant*> &Entry = 16222bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GetConstantCFStringEntry(CFConstantStringMap, Literal, 16232bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian getTargetData().isLittleEndian(), 16242bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isUTF16, StringLength); 16252bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16262bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (llvm::Constant *C = Entry.getValue()) 16272bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return C; 16282bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16292bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zero = 16302bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 16312bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zeros[] = { Zero, Zero }; 16322bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 1633ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian // If we don't already have it, get _NSConstantStringClassReference. 16342bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (!NSConstantStringClassRef) { 16352bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 16362bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Ty = llvm::ArrayType::get(Ty, 0); 1637ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian llvm::Constant *GV = CreateRuntimeVariable(Ty, 1638ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian Features.ObjCNonFragileABI ? 1639ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian "OBJC_CLASS_$_NSConstantString" : 1640ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian "_NSConstantStringClassReference"); 16412bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Decay array -> ptr 16422bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian NSConstantStringClassRef = 16432bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 16442bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 16452bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16462bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian QualType NSTy = getContext().getNSConstantStringType(); 16472bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16482bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::StructType *STy = 16492bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian cast<llvm::StructType>(getTypes().ConvertType(NSTy)); 16502bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16512bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian std::vector<llvm::Constant*> Fields(3); 16522bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16532bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Class pointer. 16542bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[0] = NSConstantStringClassRef; 16552bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16562bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String pointer. 16572bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 16582bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16592bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage; 16602bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isConstant; 16612bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (isUTF16) { 16622bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME: why do utf strings get "_" labels instead of "L" labels? 16632bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Linkage = llvm::GlobalValue::InternalLinkage; 16642bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Note: -fwritable-strings doesn't make unicode NSStrings writable, but 16652bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // does make plain ascii ones writable. 16662bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isConstant = true; 16672bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } else { 16682bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Linkage = llvm::GlobalValue::PrivateLinkage; 16692bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isConstant = !Features.WritableStrings; 16702bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 16712bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16722bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable *GV = 16732bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 16742bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian ".str"); 16752bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (isUTF16) { 16762bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 16772bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setAlignment(Align.getQuantity()); 16782bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 16792bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 16802bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16812bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String length. 16822bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 16832bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[2] = llvm::ConstantInt::get(Ty, StringLength); 16842bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16852bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // The struct. 16862bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian C = llvm::ConstantStruct::get(STy, Fields); 16872bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 16882bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable::PrivateLinkage, C, 16892bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian "_unnamed_nsstring_"); 16902bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME. Fix section. 1691ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian if (const char *Sect = 1692ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian Features.ObjCNonFragileABI 1693ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian ? getContext().Target.getNSStringNonFragileABISection() 1694ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian : getContext().Target.getNSStringSection()) 16952bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setSection(Sect); 16962bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Entry.setValue(GV); 16972bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16982bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return GV; 169933e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian} 170033e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian 17016143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 17021e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 17036143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 17041e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const char *StrData = E->getStrData(); 17051e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar unsigned Len = E->getByteLength(); 17061e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 17071e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 17081e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar getContext().getAsConstantArrayType(E->getType()); 17091e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 17101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1711dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 17121e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar std::string Str(StrData, StrData+Len); 17131e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 17141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1715dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 1716dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner RealLen *= getContext().Target.getWCharWidth()/8; 17171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17181e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 17191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17201e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 17211e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 17221e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 17236143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 17246143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 17256143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 17266143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 17276143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 17287eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 17297eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); 17307eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman if (S->isWide()) { 17317eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Type *DestTy = 17327eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); 17337eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman C = llvm::ConstantExpr::getBitCast(C, DestTy); 17347eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 17357eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman return C; 17366143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 17376143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1738eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1739eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1740eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1741eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1742eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1743eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1744a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1745a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1746eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1747eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1748eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1749a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 17501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 175145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 17525fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 17535fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 17546143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 17550032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 17560032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 17571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 175845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 17591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 176095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, 17611c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson C, GlobalName); 176245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 176345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 17646143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 17656143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 17666143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 17676143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 17686143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 17696143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 17706143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 17716143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 17725fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, 17735fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 17748e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 17758e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 17768e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 17778e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 177895b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 17798e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 17808e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 17818e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 17825fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar return GenerateStringLiteral(str, false, *this, GlobalName); 17831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StringMapEntry<llvm::Constant *> &Entry = 178595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 178645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 178745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1788eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 178945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 179045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 17915fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); 179245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 179345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 179445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 17956143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 17966143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 17976143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 17986143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 17995fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, 18005fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 1801c9f29c61856ffb5f643cedbe87ac076f21a1381aChris Lattner return GetAddrOfConstantString(str + '\0', GlobalName); 18026143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 180341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1804af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1805af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 18061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 1807af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 18081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 180917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 1810af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 18111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1812af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1813af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1814af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1815af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1816af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1817af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1818af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1819af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1820af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 182117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 1822fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1823fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1824af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 182517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 1826fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1827fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1828af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1829af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1830af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1831af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1832109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// EmitObjCIvarInitializations - Emit information for ivar initialization 1833109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// for an implementation. 1834109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanianvoid CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { 1835109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian if (!Features.NeXTRuntime || D->getNumIvarInitializers() == 0) 1836109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian return; 1837109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian DeclContext* DC = const_cast<DeclContext*>(dyn_cast<DeclContext>(D)); 1838109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian assert(DC && "EmitObjCIvarInitializations - null DeclContext"); 1839109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); 1840109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 1841109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *DTORMethod = ObjCMethodDecl::Create(getContext(), 1842109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 1843109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 1844109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().VoidTy, 0, 18453fe104154dd2e8ffb351142d74f308938b5c99bfFariborz Jahanian DC, true, false, true, false, 1846109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 1847109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(DTORMethod); 1848109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); 1849109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1850109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian II = &getContext().Idents.get(".cxx_construct"); 1851109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian cxxSelector = getContext().Selectors.getSelector(0, &II); 1852109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian // The constructor returns 'self'. 1853109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), 1854109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 1855109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 1856109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().getObjCIdType(), 0, 18573fe104154dd2e8ffb351142d74f308938b5c99bfFariborz Jahanian DC, true, false, true, false, 1858109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 1859109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(CTORMethod); 1860109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); 1861109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1862109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1863109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian} 1864109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 186591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 1866984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 186717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 1868984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 1869984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 1870984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 1871984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 187291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 187391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 1874f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 1875f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 187691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 187791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 187891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 187991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 188017945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 188191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 188291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 188391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 188491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 188541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 188641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 188741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 188841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 188941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 189041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 189141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 189241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 189316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 189416e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 189516e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 18961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 189741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 1898293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 18992b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 190041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 190116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 190216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 190316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 19041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1905555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 1906555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 1907555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 190841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 1909555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 191041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 191141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 191295d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 191341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 1914984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 191541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 19169cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 19179d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 19189cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 1919dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 1920127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 1921127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 1922018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 19239cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 192495d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 19251fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 19261fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 19271fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 19281fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 192995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 193095d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 193127ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 193227ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 193327ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 193436674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 193536674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 193636674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 193736674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 193836674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 193995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 19401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 194138e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 194241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 194341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 1944b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCCategory: 1945b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 194641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1947285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 194841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 1949b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 195041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 195141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 195241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 1953af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 1954af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 195541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 195641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 195741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1958af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 1959af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 1960af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 1961109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian EmitObjCIvarInitializations(OMD); 1962af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 196341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 19641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 196541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 196641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 196741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 19686fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 196941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 197041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 197141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 19721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 1973305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 197441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 197541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 197691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 197791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 197841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 197941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 198041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 198141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 19828d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer llvm::StringRef AsmString = AD->getAsmString()->getString(); 19831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 198441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 198541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 198641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 198741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 19888d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 198941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 199041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 19911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 1993f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 1994f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 1995f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 199641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 199741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 199841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 1999744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2000744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Turns the given pointer into a constant. 2001744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, 2002744016dde06fcffd50931e94a98c850f8b12cd87John McCall const void *Ptr) { 2003744016dde06fcffd50931e94a98c850f8b12cd87John McCall uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); 2004744016dde06fcffd50931e94a98c850f8b12cd87John McCall const llvm::Type *i64 = llvm::Type::getInt64Ty(Context); 2005744016dde06fcffd50931e94a98c850f8b12cd87John McCall return llvm::ConstantInt::get(i64, PtrInt); 2006744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2007744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2008744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic void EmitGlobalDeclMetadata(CodeGenModule &CGM, 2009744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *&GlobalMetadata, 2010744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl D, 2011744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr) { 2012744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (!GlobalMetadata) 2013744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata = 2014744016dde06fcffd50931e94a98c850f8b12cd87John McCall CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); 2015744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2016744016dde06fcffd50931e94a98c850f8b12cd87John McCall // TODO: should we report variant information for ctors/dtors? 2017744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Ops[] = { 2018744016dde06fcffd50931e94a98c850f8b12cd87John McCall Addr, 2019744016dde06fcffd50931e94a98c850f8b12cd87John McCall GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) 2020744016dde06fcffd50931e94a98c850f8b12cd87John McCall }; 2021744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops, 2)); 2022744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2023744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2024744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes associating all the global values in the 2025744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// current module with the Decls they came from. This is useful for 2026744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// projects using IR gen as a subroutine. 2027744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// 2028744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Since there's currently no way to associate an MDNode directly 2029744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with an llvm::GlobalValue, we create a global named metadata 2030744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with the name 'clang.global.decl.ptrs'. 2031744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenModule::EmitDeclMetadata() { 2032744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2033744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2034744016dde06fcffd50931e94a98c850f8b12cd87John McCall // StaticLocalDeclMap 2035744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<GlobalDecl,llvm::StringRef>::iterator 2036744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = MangledDeclNames.begin(), E = MangledDeclNames.end(); 2037744016dde06fcffd50931e94a98c850f8b12cd87John McCall I != E; ++I) { 2038744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); 2039744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); 2040744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2041744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2042744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2043744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes for all the local variables in the current 2044744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// function. 2045744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenFunction::EmitDeclMetadata() { 2046744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (LocalDeclMap.empty()) return; 2047744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2048744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::LLVMContext &Context = getLLVMContext(); 2049744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2050744016dde06fcffd50931e94a98c850f8b12cd87John McCall // Find the unique metadata ID for this name. 2051744016dde06fcffd50931e94a98c850f8b12cd87John McCall unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); 2052744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2053744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2054744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2055744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator 2056744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { 2057744016dde06fcffd50931e94a98c850f8b12cd87John McCall const Decl *D = I->first; 2058744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Addr = I->second; 2059744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2060744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { 2061744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); 2062744016dde06fcffd50931e94a98c850f8b12cd87John McCall Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, &DAddr, 1)); 2063744016dde06fcffd50931e94a98c850f8b12cd87John McCall } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { 2064744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); 2065744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); 2066744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2067744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2068744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2069673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2070673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@name Custom Runtime Function Interfaces 2071673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@{ 2072673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// 2073673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// FIXME: These can be eliminated once we can have clients just get the required 2074673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// AST nodes from the builtin tables. 2075673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2076673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectDispose() { 2077673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectDispose) 2078673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose; 2079673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2080754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2081754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectDisposeDecl) { 2082754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectDispose = GetAddrOfFunction( 2083754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl, 2084754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectDisposeDecl)); 2085754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2086754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2087754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2088673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::FunctionType *FTy; 2089673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar std::vector<const llvm::Type*> ArgTys; 2090673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); 2091673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(PtrToInt8Ty); 2092673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); 2093673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar FTy = llvm::FunctionType::get(ResultType, ArgTys, false); 2094673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose = 2095673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CreateRuntimeFunction(FTy, "_Block_object_dispose"); 2096673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2097673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2098673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectAssign() { 2099673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectAssign) 2100673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign; 2101673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2102754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2103754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectAssignDecl) { 2104754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectAssign = GetAddrOfFunction( 2105754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl, 2106754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectAssignDecl)); 2107754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2108754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2109754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2110673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::FunctionType *FTy; 2111673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar std::vector<const llvm::Type*> ArgTys; 2112673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); 2113673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(PtrToInt8Ty); 2114673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(PtrToInt8Ty); 2115673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); 2116673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar FTy = llvm::FunctionType::get(ResultType, ArgTys, false); 2117673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign = 2118673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CreateRuntimeFunction(FTy, "_Block_object_assign"); 2119673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2120673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2121673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteGlobalBlock() { 2122673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteGlobalBlock) 2123673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteGlobalBlock; 2124754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2125754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2126754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteGlobalBlockDecl) { 2127754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteGlobalBlock = GetAddrOfGlobalVar( 2128754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl, 2129754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteGlobalBlockDecl->getType())); 2130754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2131754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2132754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2133673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteGlobalBlock = CreateRuntimeVariable( 2134673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar PtrToInt8Ty, "_NSConcreteGlobalBlock"); 2135673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2136673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2137673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteStackBlock() { 2138673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteStackBlock) 2139673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteStackBlock; 2140754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2141754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2142754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteStackBlockDecl) { 2143754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteStackBlock = GetAddrOfGlobalVar( 2144754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl, 2145754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteStackBlockDecl->getType())); 2146754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2147754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2148754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2149673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteStackBlock = CreateRuntimeVariable( 2150673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar PtrToInt8Ty, "_NSConcreteStackBlock"); 2151673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2152673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2153673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@} 2154