CodeGenModule.cpp revision c5f657fe308f22243f674fc1dfbe24915944d8bf
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" 173d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman#include "CodeGenTBAA.h" 180dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar#include "CGCall.h" 194c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall#include "CGCXXABI.h" 20af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar#include "CGObjCRuntime.h" 215f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor#include "Mangle.h" 2282d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov#include "TargetInfo.h" 2306057cef0bcd7804e80f3ce2bbe352178396c715Chandler Carruth#include "clang/Frontend/CodeGenOptions.h" 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 25687cc4a850b59116efee061018f0d8df50728b82Ken Dyck#include "clang/AST/CharUnits.h" 26c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2721ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 28af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor#include "clang/AST/DeclTemplate.h" 291a5e0d7f18485e4fb958f96dcddff3e4486a4069Anders Carlsson#include "clang/AST/RecordLayout.h" 301b63e4f732dbc73d90abf886b4d21f8e3a165f6dChris Lattner#include "clang/Basic/Builtins.h" 312c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner#include "clang/Basic/Diagnostic.h" 328bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman#include "clang/Basic/SourceManager.h" 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 34e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff#include "clang/Basic/ConvertUTF.h" 35ec9426ca6039279bcc99bc2c625bb2abe4f0353dNate Begeman#include "llvm/CallingConv.h" 36bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner#include "llvm/Module.h" 375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/Intrinsics.h" 38d5b8902c0329d80a216803b58dc3b689349a0c11Chris Lattner#include "llvm/LLVMContext.h" 396374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall#include "llvm/ADT/Triple.h" 4020ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 416ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif#include "llvm/Support/CallSite.h" 4278f7ece00e2ddfb64d4ed72a7be770b5b9b805e3Chris Lattner#include "llvm/Support/ErrorHandling.h" 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 46f16aa103d3afd42fbca2ab346f191bf745cec092John McCallstatic CGCXXABI &createCXXABI(CodeGenModule &CGM) { 47f16aa103d3afd42fbca2ab346f191bf745cec092John McCall switch (CGM.getContext().Target.getCXXABI()) { 48f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_ARM: return *CreateARMCXXABI(CGM); 49f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_Itanium: return *CreateItaniumCXXABI(CGM); 50f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_Microsoft: return *CreateMicrosoftCXXABI(CGM); 51f16aa103d3afd42fbca2ab346f191bf745cec092John McCall } 52f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 53f16aa103d3afd42fbca2ab346f191bf745cec092John McCall llvm_unreachable("invalid C++ ABI kind"); 54f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return *CreateItaniumCXXABI(CGM); 55f16aa103d3afd42fbca2ab346f191bf745cec092John McCall} 56f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 582811ccf48d6d898c42cc4cfad37abedb36236d20Chandler CarruthCodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, 59468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall llvm::Module &M, const llvm::TargetData &TD, 60468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall Diagnostic &diags) 61bd3606426d389370616126af969904ec493cb105Chris Lattner : BlockModule(C, M, TD, Types, *this), Context(C), 622811ccf48d6d898c42cc4cfad37abedb36236d20Chandler Carruth Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), 63468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags), 64f16aa103d3afd42fbca2ab346f191bf745cec092John McCall ABI(createCXXABI(*this)), 65f16aa103d3afd42fbca2ab346f191bf745cec092John McCall Types(C, M, TD, getTargetCodeGenInfo().getABIInfo(), ABI), 663d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman TBAA(0), 67f16aa103d3afd42fbca2ab346f191bf745cec092John McCall VTables(*this), Runtime(0), 684c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian CFConstantStringClassRef(0), ConstantStringClassRef(0), 69673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar VMContext(M.getContext()), 70754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl(0), NSConcreteStackBlockDecl(0), 71673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar NSConcreteGlobalBlock(0), NSConcreteStackBlock(0), 72754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl(0), BlockObjectDisposeDecl(0), 73673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar BlockObjectAssign(0), BlockObjectDispose(0){ 74208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar 753c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner if (!Features.ObjC1) 763c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = 0; 773c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (!Features.NeXTRuntime) 783c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateGNUObjCRuntime(*this); 793c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (Features.ObjCNonFragileABI) 803c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacNonFragileABIObjCRuntime(*this); 813c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else 823c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacObjCRuntime(*this); 83e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 843d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman // Enable TBAA unless it's suppressed. 853d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!CodeGenOpts.RelaxedAliasing && CodeGenOpts.OptimizationLevel > 0) 860b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman TBAA = new CodeGenTBAA(Context, VMContext, getLangOptions(), 870b5c4fc2ae3b503c2b1f354bf52b718aa50a6aeeDan Gohman ABI.getMangleContext()); 883d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 89e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 9020f12a20ba9cfa6f8d53c8304e24f50903c45184Anders Carlsson DebugInfo = CodeGenOpts.DebugInfo ? new CGDebugInfo(*this) : 0; 912b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 922b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 932b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 94815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 95f16aa103d3afd42fbca2ab346f191bf745cec092John McCall delete &ABI; 964376c85fb0ac9e7fd779d246efc77e1169179138Dan Gohman delete TBAA; 97815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 98815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 99815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 1000d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnallvoid CodeGenModule::createObjCRuntime() { 1010d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall if (!Features.NeXTRuntime) 1020d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateGNUObjCRuntime(*this); 1030d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else if (Features.ObjCNonFragileABI) 1040d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateMacNonFragileABIObjCRuntime(*this); 1050d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else 1060d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Runtime = CreateMacObjCRuntime(*this); 1070d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall} 1080d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall 109815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 11082227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 1116c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalInitFunc(); 112efb0fa9e11f75af51744a6159530ef7cc8efa24aDaniel Dunbar EmitCXXGlobalDtorFunc(); 113208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 114208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 115208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 1166bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 1176bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 118532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 1190269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 120744016dde06fcffd50931e94a98c850f8b12cd87John McCall 121b25938303de0976b9f189363d43033e5788e3d36John McCall SimplifyPersonality(); 122b25938303de0976b9f189363d43033e5788e3d36John McCall 123744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (getCodeGenOpts().EmitDeclMetadata) 124744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitDeclMetadata(); 125f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 126f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 1273d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanllvm::MDNode *CodeGenModule::getTBAAInfo(QualType QTy) { 1283d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!TBAA) 1293d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return 0; 1303d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return TBAA->getTBAAInfo(QTy); 1313d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1323d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1333d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanvoid CodeGenModule::DecorateInstruction(llvm::Instruction *Inst, 1343d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman llvm::MDNode *TBAAInfo) { 1353d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman Inst->setMetadata(llvm::LLVMContext::MD_tbaa, TBAAInfo); 1363d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1373d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1386374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCallbool CodeGenModule::isTargetDarwin() const { 1396374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall return getContext().Target.getTriple().getOS() == llvm::Triple::Darwin; 1406374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall} 1416374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 142488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 1432c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 14490df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 14590df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 14690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 14790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 14956b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 1502c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 1510a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 1520a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 1532c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 15458c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 155488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 156c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 15790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 15890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 15990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 16090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 1611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 16256b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 163c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 1640a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 165c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 166c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 167110e8e56af30363072c140285961592b0107f789John McCallstatic llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V) { 168110e8e56af30363072c140285961592b0107f789John McCall switch (V) { 169110e8e56af30363072c140285961592b0107f789John McCall case DefaultVisibility: return llvm::GlobalValue::DefaultVisibility; 170110e8e56af30363072c140285961592b0107f789John McCall case HiddenVisibility: return llvm::GlobalValue::HiddenVisibility; 171110e8e56af30363072c140285961592b0107f789John McCall case ProtectedVisibility: return llvm::GlobalValue::ProtectedVisibility; 172110e8e56af30363072c140285961592b0107f789John McCall } 173110e8e56af30363072c140285961592b0107f789John McCall llvm_unreachable("unknown visibility!"); 174110e8e56af30363072c140285961592b0107f789John McCall return llvm::GlobalValue::DefaultVisibility; 175110e8e56af30363072c140285961592b0107f789John McCall} 176110e8e56af30363072c140285961592b0107f789John McCall 177110e8e56af30363072c140285961592b0107f789John McCall 1781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 179af14603ca61757cf4361b583b45639a04c57e651John McCall const NamedDecl *D, 180af14603ca61757cf4361b583b45639a04c57e651John McCall bool IsForDefinition) const { 18104d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 182df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 1837e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 1846ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 1857e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 1866ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 187af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility for definitions. 188af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 189af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.visibilityExplicit() || 190af14603ca61757cf4361b583b45639a04c57e651John McCall (IsForDefinition && !GV->hasAvailableExternallyLinkage())) 191af14603ca61757cf4361b583b45639a04c57e651John McCall GV->setVisibility(GetLLVMVisibility(LV.visibility())); 1927cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 1937cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 194cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// Set the symbol visibility of type information (vtable and RTTI) 195cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// associated with the given type. 196cbfe50224b19119e759802bd0c1463269dffd09eJohn McCallvoid CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV, 197cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall const CXXRecordDecl *RD, 198af14603ca61757cf4361b583b45639a04c57e651John McCall bool IsForRTTI, 199af14603ca61757cf4361b583b45639a04c57e651John McCall bool IsForDefinition) const { 200af14603ca61757cf4361b583b45639a04c57e651John McCall setGlobalVisibility(GV, RD, IsForDefinition); 201cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 202279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakVTables) 203279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall return; 204279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall 205cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We want to drop the visibility to hidden for weak type symbols. 206cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // This isn't possible if there might be unresolved references 207cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // elsewhere that rely on this symbol being visible. 208cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2097a536907da776bdc47a704e7cafd641e8150e653John McCall // This should be kept roughly in sync with setThunkVisibility 2107a536907da776bdc47a704e7cafd641e8150e653John McCall // in CGVTables.cpp. 2117a536907da776bdc47a704e7cafd641e8150e653John McCall 212cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Preconditions. 213cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (GV->getLinkage() != llvm::GlobalVariable::WeakODRLinkage || 214cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->getVisibility() != llvm::GlobalVariable::DefaultVisibility) 215cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 216cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 217cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Don't override an explicit visibility attribute. 218cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (RD->hasAttr<VisibilityAttr>()) 219cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 220cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 221cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall switch (RD->getTemplateSpecializationKind()) { 222cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We have to disable the optimization if this is an EI definition 223cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // because there might be EI declarations in other shared objects. 224cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDefinition: 225cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDeclaration: 226cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 227cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2287a536907da776bdc47a704e7cafd641e8150e653John McCall // Every use of a non-template class's type information has to emit it. 229cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_Undeclared: 230cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 231cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2327a536907da776bdc47a704e7cafd641e8150e653John McCall // In theory, implicit instantiations can ignore the possibility of 2337a536907da776bdc47a704e7cafd641e8150e653John McCall // an explicit instantiation declaration because there necessarily 2347a536907da776bdc47a704e7cafd641e8150e653John McCall // must be an EI definition somewhere with default visibility. In 2357a536907da776bdc47a704e7cafd641e8150e653John McCall // practice, it's possible to have an explicit instantiation for 2367a536907da776bdc47a704e7cafd641e8150e653John McCall // an arbitrary template class, and linkers aren't necessarily able 2377a536907da776bdc47a704e7cafd641e8150e653John McCall // to deal with mixed-visibility symbols. 2387a536907da776bdc47a704e7cafd641e8150e653John McCall case TSK_ExplicitSpecialization: 239cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ImplicitInstantiation: 240279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakTemplateVTables) 2417a536907da776bdc47a704e7cafd641e8150e653John McCall return; 242cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 243cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall } 244cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 245cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // If there's a key function, there may be translation units 246cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // that don't have the key function's definition. But ignore 247cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // this if we're emitting RTTI under -fno-rtti. 248cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (!IsForRTTI || Features.RTTI) 249cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (Context.getKeyFunction(RD)) 250cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 251cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 252cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Otherwise, drop the visibility to hidden. 253cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 254cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall} 255cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 256793a990774826a0c20b0da66cec0991badfb8b63Anders Carlssonllvm::StringRef CodeGenModule::getMangledName(GlobalDecl GD) { 257793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 258793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 259793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; 260793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (!Str.empty()) 261793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 262793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 2634c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall if (!getCXXABI().getMangleContext().shouldMangleDeclName(ND)) { 264793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson IdentifierInfo *II = ND->getIdentifier(); 265793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson assert(II && "Attempt to mangle unnamed decl."); 266793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 267793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = II->getName(); 268793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 269793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson } 270793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 271793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::SmallString<256> Buffer; 272793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 2734c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Buffer); 274793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 2754c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Buffer); 276793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const BlockDecl *BD = dyn_cast<BlockDecl>(ND)) 2774c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleBlock(GD, BD, Buffer); 278793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else 2794c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleName(ND, Buffer); 280793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 281793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson // Allocate space for the mangled name. 282793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson size_t Length = Buffer.size(); 283793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson char *Name = MangledNamesAllocator.Allocate<char>(Length); 284793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson std::copy(Buffer.begin(), Buffer.end(), Name); 285793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 286793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = llvm::StringRef(Name, Length); 287793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 288793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 289793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson} 290793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 291564360be450b319aeafc26698be9811837bfb826Fariborz Jahanianvoid CodeGenModule::getMangledName(GlobalDecl GD, MangleBuffer &Buffer, 292564360be450b319aeafc26698be9811837bfb826Fariborz Jahanian const BlockDecl *BD) { 2934c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleBlock(GD, BD, Buffer.getBuffer()); 2949a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson} 2959a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson 296f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::GlobalValue *CodeGenModule::GetGlobalValue(llvm::StringRef Name) { 297f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return getModule().getNamedValue(Name); 2985f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 2995f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 3006d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 3016d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 3026bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 30349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3046bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 3056d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3066d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 3076bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 3086bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 3096bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 31049988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3116bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 3126bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 3136bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3146bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 3156bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 3166bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 3171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 3186bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<const llvm::Type*>(), 3196bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar false); 32096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 3216bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3226bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 3231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType* CtorStructTy = 3241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), 32596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 3266bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3276bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 3286bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 3296bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 3306bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 3311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 3320032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 3333c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 33408e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 3356bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 3366bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3376bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 33896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 3391c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 340572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 3417db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 3421c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 3436d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 3446d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3456d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 346532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 347532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 348532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 349532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 350532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 351532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 35296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 353532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 354532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 3551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *gv = 3561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(TheModule, Array->getType(), false, 3571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::AppendingLinkage, Array, 3581c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.global.annotations"); 359532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 360532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 361532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 362d46f98573ba104eda102dd3224b2dca69f1c6336John McCallllvm::GlobalValue::LinkageTypes 363d46f98573ba104eda102dd3224b2dca69f1c6336John McCallCodeGenModule::getFunctionLinkage(const FunctionDecl *D) { 36490e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); 3657c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 366f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_Internal) 367d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::InternalLinkage; 368f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 369f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<DLLExportAttr>()) 370d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::DLLExportLinkage; 371f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 372f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<WeakAttr>()) 373d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::WeakAnyLinkage; 374f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 375f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 376f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition somewhere else, so we can use available_externally linkage. 377f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_C99Inline) 378d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::AvailableExternallyLinkage; 379f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 380f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C++, the compiler has to emit a definition in every translation unit 381f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // that references the function. We should use linkonce_odr because 382f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // a) if all references in this translation unit are optimized away, we 383f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 384f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 385f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition is dependable. 386f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 387d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::LinkOnceODRLinkage; 388f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 389f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // An explicit instantiation of a template has weak linkage, since 390f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // explicit instantiations can occur in multiple translation units 391f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // and must all be equivalent. However, we are not allowed to 392f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // throw away these explicit instantiations. 393f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_ExplicitTemplateInstantiation) 3948f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor return llvm::Function::WeakODRLinkage; 395f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 396f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // Otherwise, we have strong external linkage. 397f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner assert(Linkage == GVA_StrongExternal); 398f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner return llvm::Function::ExternalLinkage; 399d46f98573ba104eda102dd3224b2dca69f1c6336John McCall} 400d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 401d46f98573ba104eda102dd3224b2dca69f1c6336John McCall 402d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// SetFunctionDefinitionAttributes - Set attributes for a global. 403d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// 404d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// FIXME: This is currently only done for aliases and functions, but not for 405d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// variables (these details are set in EmitGlobalVarDefinition for variables). 406d46f98573ba104eda102dd3224b2dca69f1c6336John McCallvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 407d46f98573ba104eda102dd3224b2dca69f1c6336John McCall llvm::GlobalValue *GV) { 4087c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 409d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 410d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 4117dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 4121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 4137dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 414ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 415761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 416ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 417761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 418ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 419ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 420f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 421f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4227c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 4237c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 42474ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 4251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 426af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 42740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<AlwaysInlineAttr>()) 428af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 4291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 430dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar if (D->hasAttr<NakedAttr>()) 431dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar F->addFnAttr(llvm::Attribute::Naked); 432dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar 4331feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 43481ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 435f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 436c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) 437c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola F->setUnnamedAddr(true); 438c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola 439fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson if (Features.getStackProtectorMode() == LangOptions::SSPOn) 440fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 441fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson else if (Features.getStackProtectorMode() == LangOptions::SSPReq) 442fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 443fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 444cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); 445cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt if (alignment) 446cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt F->setAlignment(alignment); 447cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt 448fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 449bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 450bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 451f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 452f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 4547c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 4551fb0caaa7bef765b85972274e3b434af2572c141John McCall if (isa<NamedDecl>(D)) 456af14603ca61757cf4361b583b45639a04c57e651John McCall setGlobalVisibility(GV, cast<NamedDecl>(D), /*ForDef*/ true); 4571fb0caaa7bef765b85972274e3b434af2572c141John McCall else 4581fb0caaa7bef765b85972274e3b434af2572c141John McCall GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 4597c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 46040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 4617c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 4627c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 46340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 4647c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 46582d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 46682d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); 4677c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 4687c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4690e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 4700e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 4710e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 4720e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 4730e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 4747c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4757c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 4767c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4770e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 478f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 479f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 480b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlssonvoid CodeGenModule::SetFunctionAttributes(GlobalDecl GD, 481c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 482c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 483b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); 484b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson 485c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 486b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); 4871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4887c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 4897c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 4901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 49140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 4927c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 4931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 49440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<WeakImportAttr>()) { 4957c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 4961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 4977c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 4987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 4991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 500af14603ca61757cf4361b583b45639a04c57e651John McCall 501af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = FD->getLinkageAndVisibility(); 502af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() == ExternalLinkage && LV.visibilityExplicit()) { 503af14603ca61757cf4361b583b45639a04c57e651John McCall F->setVisibility(GetLLVMVisibility(LV.visibility())); 504af14603ca61757cf4361b583b45639a04c57e651John McCall } 5057c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 5067c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 50740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 5087c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 509219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 510219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 5110269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 5121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 5130269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 51435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 5150269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5160269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5170269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 5180269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 519ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 5200269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 5210269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5223c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 5231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 52435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 52535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 52635f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 52735f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 5281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 5291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 530a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 53135f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 5321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 533c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 534c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 53596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 5361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 5381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 5390269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 5407db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 5411c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 5420269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5430269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 5440269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5450269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5460269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 54767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 54867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 54967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 550bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 551046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson while (!DeferredDeclsToEmit.empty() || !DeferredVTables.empty()) { 552046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson if (!DeferredVTables.empty()) { 553046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson const CXXRecordDecl *RD = DeferredVTables.back(); 554046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson DeferredVTables.pop_back(); 555046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson getVTables().GenerateClassData(getVTableLinkage(RD), RD); 556bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola continue; 557bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola } 558bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 5592a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 56067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 56167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 562c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // Check to see if we've already emitted this. This is necessary 563c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // for a couple of reasons: first, decls can end up in the 564c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // deferred-decls queue multiple times, and second, decls can end 565c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // up with definitions in unusual ways (e.g. by an extern inline 566c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // function acquiring a strong function redefinition). Just 567c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // ignore these cases. 568c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // 569c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // TODO: That said, looking this up multiple times is very wasteful. 5709a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef Name = getMangledName(D); 571f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *CGRef = GetGlobalValue(Name); 57267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 5731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 57467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 57567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 5761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 577c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // GlobalAlias::isDeclaration() defers to the aliasee, but for our 578c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // purposes an alias counts as a definition. 579c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall if (isa<llvm::GlobalAlias>(CGRef)) 580c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall continue; 581c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall 58267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 58367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 58467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 5855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 5888bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 5891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 5901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// GlobalValue being annotated. The second field is the constant string 5911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// created from the AnnotateAttr's annotation. The third field is a constant 5928bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 5938bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 5948bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 5958bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 5968bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 5978bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 5981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 5998bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 6008bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 6018bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 6028bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6038bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 6048bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 6053c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); 6061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *anno = llvm::ConstantArray::get(VMContext, 6070032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson AA->getAnnotation(), true); 6080032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *unit = llvm::ConstantArray::get(VMContext, 6090032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson M->getModuleIdentifier(), 6108bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 6118bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6128bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 6138bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 6141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *annoGV = 61595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, anno->getType(), false, 61695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, anno, 61795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GV->getName()); 6188bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 6198bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 62095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, unit->getType(), false, 6211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::PrivateLinkage, unit, 62295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ".str"); 6238bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 62457d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 6258bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 6263c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, SBP), 6273c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(annoGV, SBP), 6283c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(unitGV, SBP), 6290032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) 6308bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 63147a434ff3d49e7906eda88e8e8242e4297725b32Owen Anderson return llvm::ConstantStruct::get(VMContext, Fields, 4, false); 6328bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 6338bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 634a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidisbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 63590e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis // Never defer when EmitAllDecls is specified. 63690e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis if (Features.EmitAllDecls) 637a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidis return false; 6380b6bc8bd7a1d2a7d7478d13d78cff94cacad61fcDouglas Gregor 6394ac7c0bb39696e92fd220118fedc484c09a69870Argyrios Kyrtzidis return !getContext().DeclMustBeEmitted(Global); 64073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 64173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 6426a836706c40a31c716952b74785102c90fd6afa7Rafael Espindolallvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { 6436a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const AliasAttr *AA = VD->getAttr<AliasAttr>(); 6446a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola assert(AA && "No alias?"); 6456a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6466a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); 6476a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6486a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // See if there is already something with the target's name in the module. 649f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); 6506a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6516a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::Constant *Aliasee; 6526a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (isa<llvm::FunctionType>(DeclTy)) 653f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl()); 6546a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola else 655f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 6566a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::PointerType::getUnqual(DeclTy), 0); 6576a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (!Entry) { 6586a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); 6596a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola F->setLinkage(llvm::Function::ExternalWeakLinkage); 6606a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.insert(F); 6616a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 6626a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6636a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return Aliasee; 6646a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola} 6656a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 666b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 6674a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 6681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6696a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // Weak references don't produce any output by themselves. 6706a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (Global->hasAttr<WeakRefAttr>()) 6716a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return; 6726a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 673bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 674bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 67540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 676f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return EmitAliasDefinition(GD); 677219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 67867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 6795e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 680754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (FD->getIdentifier()) { 681754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = FD->getName(); 682754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_Block_object_assign") { 683754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl = FD; 684754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_Block_object_dispose") { 685754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl = FD; 686754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 687754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 688754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 68973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 69073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 69173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 6920269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 6930269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 694bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 695bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 696754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (VD->getIdentifier()) { 697754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = VD->getName(); 698754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_NSConcreteGlobalBlock") { 699754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl = VD; 700754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_NSConcreteStackBlock") { 701754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl = VD; 702754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 703754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 704754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 705754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 706a9a55c063e9e59c6ab0a6d7a21302660f7bde9f9Douglas Gregor if (VD->isThisDeclarationADefinition() != VarDecl::Definition) 70773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7084c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 7094c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 71067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 71167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 7124357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (!MayDeferGeneration(Global)) { 7134357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Emit the definition if it can't be deferred. 7144357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner EmitGlobalDefinition(GD); 715bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 716bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 717bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall 718bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // If we're deferring emission of a C++ variable with an 719bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer, remember the order in which it appeared in the file. 720bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus && isa<VarDecl>(Global) && 721bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall cast<VarDecl>(Global)->hasInit()) { 722bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); 723bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall CXXGlobalInits.push_back(0); 724bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } 7254357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 7264357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // If the value has already been used, add it directly to the 7274357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit list. 7289a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 7294357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (GetGlobalValue(MangledName)) 7304357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDeclsToEmit.push_back(GD); 7314357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner else { 7324357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 7334357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // first use of the mangled name will cause it to move into 7344357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit. 7354357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDecls[MangledName] = GD; 7364357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner } 7374c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 7384c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 739b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 7404a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 7411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 742cb421fa690da545b58a720abe5f1c49b166dbde7Dan Gohman PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), 7438e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 7448e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 7458e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 74644eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 74744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // At -O0, don't generate IR for functions with available_externally 74844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // linkage. 7497feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor if (CodeGenOpts.OptimizationLevel == 0 && 7507feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor !Function->hasAttr<AlwaysInlineAttr>() && 75144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getFunctionLinkage(Function) 75244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor == llvm::Function::AvailableExternallyLinkage) 75344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return; 75444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor 75544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { 75644eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (Method->isVirtual()) 75744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getVTables().EmitThunks(GD); 7587270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson 75944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) 76044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return EmitCXXConstructor(CD, GD.getCtorType()); 7614357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 76244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(Method)) 76344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return EmitCXXDestructor(DD, GD.getDtorType()); 76444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 765b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 766b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalFunctionDefinition(GD); 76744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 768b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 769b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 770b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalVarDefinition(VD); 7714357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 7724357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner assert(0 && "Invalid argument to EmitGlobalDefinition()"); 773bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 774bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 77574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 77674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 77774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 77874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 77974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 78074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 78174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 782f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 783f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMFunction(llvm::StringRef MangledName, 784f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *Ty, 785f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GlobalDecl D) { 7860558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 787f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 7880558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 7896a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 7906a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); 7916a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (FD && !FD->hasAttr<WeakAttr>()) 7927270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 7936a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7946a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 7956a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 7966a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7970558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 7980558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 7991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8000558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 80196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 8023c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, PTy); 8030558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 8041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 805654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 806654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 807654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 808654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 809784f21121a6c9418ebd86baa6814e36e1176c410John McCall 810784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::FunctionType *FTy; 811784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (isa<llvm::FunctionType>(Ty)) { 812784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = cast<llvm::FunctionType>(Ty); 813784f21121a6c9418ebd86baa6814e36e1176c410John McCall } else { 814784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 815784f21121a6c9418ebd86baa6814e36e1176c410John McCall std::vector<const llvm::Type*>(), false); 816654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 817654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 818bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 819784f21121a6c9418ebd86baa6814e36e1176c410John McCall llvm::Function *F = llvm::Function::Create(FTy, 820654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 821f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall MangledName, &getModule()); 822f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(F->getName() == MangledName && "name was uniqued!"); 823654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 824b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetFunctionAttributes(D, F, IsIncompleteFunction); 825654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 82667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 82767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 82867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 829f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 83067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 83167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 83267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 83367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 83467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 835bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall 836bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Otherwise, there are cases we have to worry about where we're 837bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // using a declaration for which we must emit a definition but where 838bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // we might not find a top-level definition: 839bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - member functions defined inline in their classes 840bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - friend functions defined inline in some class 841bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - special member functions with implicit definitions 842bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // If we ever change our AST traversal to walk into class methods, 843bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // this will be unnecessary. 844bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } else if (getLangOptions().CPlusPlus && D.getDecl()) { 845bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Look for a declaration that's lexically in a record. 846bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall const FunctionDecl *FD = cast<FunctionDecl>(D.getDecl()); 847bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall do { 848bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { 849bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall if (FD->isImplicit()) { 850bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall assert(FD->isUsed() && "Sema didn't mark implicit function as used!"); 851bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall DeferredDeclsToEmit.push_back(D); 852bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 853bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } else if (FD->isThisDeclarationADefinition()) { 854bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall DeferredDeclsToEmit.push_back(D); 855bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 856bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } 8577b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 858bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall FD = FD->getPreviousDeclaration(); 859bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } while (FD); 86067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 8611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 862784f21121a6c9418ebd86baa6814e36e1176c410John McCall // Make sure the result is of the requested type. 863784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (!IsIncompleteFunction) { 864784f21121a6c9418ebd86baa6814e36e1176c410John McCall assert(F->getType()->getElementType() == Ty); 865784f21121a6c9418ebd86baa6814e36e1176c410John McCall return F; 866784f21121a6c9418ebd86baa6814e36e1176c410John McCall } 867784f21121a6c9418ebd86baa6814e36e1176c410John McCall 868784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 869784f21121a6c9418ebd86baa6814e36e1176c410John McCall return llvm::ConstantExpr::getBitCast(F, PTy); 8700558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 8710558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 87274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 87374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 87474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 875b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 87674391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 87774391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 87874391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 8794a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 880bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 8819a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 882f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMFunction(MangledName, Ty, GD); 88374391b48b4791cded373683a3baf67314f358d50Chris Lattner} 88477ba708819285931932ecd33691a672bb59d221aEli Friedman 88574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 88674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 88774391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 88874391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 889f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 890b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); 89174391b48b4791cded373683a3baf67314f358d50Chris Lattner} 892bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 89320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedmanstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D) { 89488786862424cb2d478516d911709dc19c962af9cJohn McCall if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) 89520e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 89620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman if (Context.getLangOptions().CPlusPlus && 89720e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman Context.getBaseElementType(D->getType())->getAs<RecordType>()) { 89820e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman // FIXME: We should do something fancier here! 89920e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 90020e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 90120e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 90220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 90320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 90474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 90574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 90674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 90774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 90874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 90974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 91074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 911f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 912f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMGlobal(llvm::StringRef MangledName, 913f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::PointerType *Ty, 914f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const VarDecl *D) { 9153c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 916f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 91799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 9186a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 9196a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (D && !D->hasAttr<WeakAttr>()) 9207270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 9216a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 9226a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 9236a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 9246a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 92574391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 926570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 9271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 92899b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 9293c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 93099b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 9311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 93267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 93367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 93467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 935f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 93667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 93767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 93867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 93967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 94067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 94167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 9421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 9441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 94599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 946f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 0, MangledName, 0, 94756ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 94849988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 94999b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 95074391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 951f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 952f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 95320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman GV->setConstant(DeclIsConstantGlobal(Context, D)); 95449988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 955110e8e56af30363072c140285961592b0107f789John McCall // Set linkage and visibility in case we never see a definition. 956af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 957af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() != ExternalLinkage) { 958110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::InternalLinkage); 959110e8e56af30363072c140285961592b0107f789John McCall } else { 960110e8e56af30363072c140285961592b0107f789John McCall if (D->hasAttr<DLLImportAttr>()) 961110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::DLLImportLinkage); 962110e8e56af30363072c140285961592b0107f789John McCall else if (D->hasAttr<WeakAttr>() || D->hasAttr<WeakImportAttr>()) 963110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 964110e8e56af30363072c140285961592b0107f789John McCall 965af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility on a declaration only if it's explicit. 966af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.visibilityExplicit()) 967af14603ca61757cf4361b583b45639a04c57e651John McCall GV->setVisibility(GetLLVMVisibility(LV.visibility())); 968110e8e56af30363072c140285961592b0107f789John McCall } 96956ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 97056ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 97174391b48b4791cded373683a3baf67314f358d50Chris Lattner } 9721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 973f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GV; 97474391b48b4791cded373683a3baf67314f358d50Chris Lattner} 975eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 976eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 97774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 97874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 97974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 98074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 98174391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 98274391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 98374391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 98474391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 98574391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 98674391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 9871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::PointerType *PTy = 98996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 990f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 9919a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 992f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMGlobal(MangledName, PTy, D); 99374391b48b4791cded373683a3baf67314f358d50Chris Lattner} 9943f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 99574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 99674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 99774391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 99874391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 999f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 100096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0); 1001bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1002bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 100303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 100403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 100503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 10067520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 10077520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 10087520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 10097520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 10109a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1011f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (!GetGlobalValue(MangledName)) { 1012555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 101303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 10147520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 10157520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 10167520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 10177520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 101803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 101903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 102003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 10216fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregorvoid CodeGenModule::EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired) { 10226fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor if (DefinitionRequired) 10236fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor getVTables().GenerateClassData(getVTableLinkage(Class), Class); 10246fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor} 10256fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor 10264b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregorllvm::GlobalVariable::LinkageTypes 1027046c294a43024874ff35656c6e785b64e72f1f36Anders CarlssonCodeGenModule::getVTableLinkage(const CXXRecordDecl *RD) { 1028dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (RD->isInAnonymousNamespace() || !RD->hasLinkage()) 1029dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::InternalLinkage; 1030dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1031dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (const CXXMethodDecl *KeyFunction 1032dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor = RD->getASTContext().getKeyFunction(RD)) { 1033dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // If this class has a key function, use that to determine the linkage of 1034dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // the vtable. 10354b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor const FunctionDecl *Def = 0; 103606a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (KeyFunction->hasBody(Def)) 10374b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor KeyFunction = cast<CXXMethodDecl>(Def); 1038dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 10394b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor switch (KeyFunction->getTemplateSpecializationKind()) { 10404b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_Undeclared: 10414b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitSpecialization: 10424b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->isInlined()) 10434b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10444b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10454b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::ExternalLinkage; 10464b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10474b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ImplicitInstantiation: 10484b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDefinition: 10494b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10504b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10514b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 10524b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // FIXME: Use available_externally linkage. However, this currently 10534b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // breaks LLVM's build due to undefined symbols. 10544b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 10554b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10564b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 1057dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor } 1058dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1059dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor switch (RD->getTemplateSpecializationKind()) { 1060dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_Undeclared: 1061dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitSpecialization: 1062dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ImplicitInstantiation: 1063dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitInstantiationDefinition: 1064dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 1065dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1066dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitInstantiationDeclaration: 1067dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // FIXME: Use available_externally linkage. However, this currently 1068dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // breaks LLVM's build due to undefined symbols. 1069dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 10704b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10714b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 10724b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10734b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // Silence GCC warning. 10744b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10754b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor} 10764b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 1077687cc4a850b59116efee061018f0d8df50728b82Ken DyckCharUnits CodeGenModule::GetTargetTypeStoreSize(const llvm::Type *Ty) const { 1078687cc4a850b59116efee061018f0d8df50728b82Ken Dyck return CharUnits::fromQuantity( 1079687cc4a850b59116efee061018f0d8df50728b82Ken Dyck TheTargetData.getTypeStoreSizeInBits(Ty) / Context.getCharWidth()); 1080687cc4a850b59116efee061018f0d8df50728b82Ken Dyck} 1081687cc4a850b59116efee061018f0d8df50728b82Ken Dyck 1082bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 10838f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 108477ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 10856c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman bool NonConstInit = false; 10861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 108731310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl const Expr *InitExpr = D->getAnyInitializer(); 10883bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson 10893bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson if (!InitExpr) { 1090cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 109103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 109203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 109303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 109403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 109503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 109603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 109703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 109803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 109903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 1100b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 110177ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 1102c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor Init = EmitConstantExpr(InitExpr, D->getType()); 11036e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 11043bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson QualType T = InitExpr->getType(); 1105c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor if (D->getType()->isReferenceType()) 1106c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor T = D->getType(); 1107c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor 110889ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 110989ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 11106c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman NonConstInit = true; 111189ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 111289ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 111389ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 111489ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 1115bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } else { 1116bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // We don't need an initializer, so remove the entry for the delayed 1117bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer position (just in case this entry was delayed). 1118bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus) 1119bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition.erase(D); 11206e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 11218f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 11228e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 11232d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 1124570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 11251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1126570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 1127570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 11289d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 11299d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 11309d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 1131570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 1132570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 11331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1134570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 1135570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 11361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1137570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 1138570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 1139570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 1140570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 1141570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 1142570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 1143570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 1144570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 1145570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 1146570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 1147570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 1148570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { 11491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1150f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // Move the old entry aside so that we'll create a new one. 1151f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Entry->setName(llvm::StringRef()); 1152232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 1153570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 1154570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 11550558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 115677ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 11571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 11583c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 1159570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 116077ba708819285931932ecd33691a672bb59d221aEli Friedman 116177ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 1162570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 116377ba708819285931932ecd33691a672bb59d221aEli Friedman } 116477ba708819285931932ecd33691a672bb59d221aEli Friedman 116540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 11668bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 11678bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 1168f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 11698bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 11708bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 117188a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 1172e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 1173e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 1174e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 11756c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman if (!NonConstInit && DeclIsConstantGlobal(Context, D)) 1176e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 11771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11788b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); 1179354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 118088a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 1181354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage = 1182354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GetLLVMLinkageVarDefinition(D, GV); 1183354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setLinkage(Linkage); 1184354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian if (Linkage == llvm::GlobalVariable::CommonLinkage) 1185354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // common vars aren't constant even if declared const. 1186354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setConstant(false); 1187354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1188354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian SetCommonAttributes(D, GV); 1189354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 11903030eb82593097502469a8b3fc26112c79c75605John McCall // Emit the initializer function if necessary. 11913030eb82593097502469a8b3fc26112c79c75605John McCall if (NonConstInit) 11923030eb82593097502469a8b3fc26112c79c75605John McCall EmitCXXGlobalVarDeclInitFunc(D, GV); 11933030eb82593097502469a8b3fc26112c79c75605John McCall 1194354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // Emit global variable debug information. 1195354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian if (CGDebugInfo *DI = getDebugInfo()) { 1196354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->setLocation(D->getLocation()); 1197354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->EmitGlobalVariable(GV, D); 1198354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian } 1199354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian} 1200354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1201354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanianllvm::GlobalValue::LinkageTypes 1202354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz JahanianCodeGenModule::GetLLVMLinkageVarDefinition(const VarDecl *D, 1203354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalVariable *GV) { 120490e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); 1205a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 1206354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::InternalLinkage; 120740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1208354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLImportLinkage; 120940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1210354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLExportLinkage; 1211e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1212e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1213354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 1214e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1215354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 12168f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor } else if (Linkage == GVA_TemplateInstantiation || 12178f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor Linkage == GVA_ExplicitTemplateInstantiation) 12188f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor // FIXME: It seems like we can provide more specific linkage here 12198f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor // (LinkOnceODR, WeakODR). 1220354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 1221a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher else if (!getLangOptions().CPlusPlus && 1222a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher ((!CodeGenOpts.NoCommon && !D->getAttr<NoCommonAttr>()) || 1223a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher D->getAttr<CommonAttr>()) && 1224309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 122591f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher !D->getAttr<SectionAttr>() && !D->isThreadSpecified()) { 122691f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher // Thread local vars aren't considered common linkage. 1227354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::CommonLinkage; 1228686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 1229354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::ExternalLinkage; 123088a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 12315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1232bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1233bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1234bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1235bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1236bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1237bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1238bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1239bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1240bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1241bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1242bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1243bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1244bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1245bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 12461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1247bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 1248bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 1249bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1250bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1251dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer UI != E; ) { 1252bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 1253dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::Value::use_iterator I = UI++; // Increment before the CI is erased. 1254dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*I); 12558670cd3ea4dfbf86caacd270ec2441e9949bbb6aGabor Greif if (!CI) continue; // FIXME: when we allow Invoke, just do CallSite CS(*I) 125635db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif llvm::CallSite CS(CI); 1257dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer if (!CI || !CS.isCallee(I)) continue; 12581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1259bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1260bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1261bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1262bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1263bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1264bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1265bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1266bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1267bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1268bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1269bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1270bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 127135db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif if (CS.arg_size() == ArgNo || 127235db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif CS.getArgument(ArgNo)->getType() != AI->getType()) { 1273bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1274bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1275bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1276bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1277bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1278bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 12791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1280bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1281bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 12826ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif ArgList.append(CS.arg_begin(), CS.arg_begin() + ArgNo); 1283bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 1284bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 1285bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1286ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1287bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 1288bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 1289ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1290bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1291bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 129200549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 129300549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 12943b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1295c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner // Copy debug location attached to CI. 1296c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner if (!CI->getDebugLoc().isUnknown()) 1297c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner NewCall->setDebugLoc(CI->getDebugLoc()); 1298bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1299bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1300bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1301bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1302bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1303b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 1304b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 1305c0bf462cf35fe050bddbd8bff967298e4a67e79dJohn McCall const llvm::FunctionType *Ty = getTypes().GetFunctionType(GD); 13064c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleInitDiscriminator(); 13079fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1308b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 13091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13100558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 13110558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 13120558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 13130558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 13140558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 13151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13170558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1318bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 13191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 132042745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1321bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 13220558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 132334809507232bc4c3c4840c7d092c7440219fddafChris Lattner 132462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 132562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 132662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 132762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 132862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 132962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 1330f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // (e.g. "int f(int x)"). Move the old function aside so that it 1331f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // doesn't interfere with GetAddrOfFunction. 1332f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall OldFn->setName(llvm::StringRef()); 1333b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 13341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1335bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1336bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1337bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 13389fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1339bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 13409fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 13419fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 13421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 134362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1344bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 13451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 13463c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1347bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1348bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 13491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 135062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1351bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 13521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13530558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1354bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 13551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1356112c967bd5c862a0f5d7913aa06700c048807db8John McCall // We need to set linkage and visibility on the function before 1357112c967bd5c862a0f5d7913aa06700c048807db8John McCall // generating code for it because various parts of IR generation 1358112c967bd5c862a0f5d7913aa06700c048807db8John McCall // want to propagate this information down (e.g. to local static 1359112c967bd5c862a0f5d7913aa06700c048807db8John McCall // declarations). 13600558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 13618b2423361648c39a7d8a3c5e8129e12006deac32John McCall setFunctionLinkage(D, Fn); 1362bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1363112c967bd5c862a0f5d7913aa06700c048807db8John McCall // FIXME: this is redundant with part of SetFunctionDefinitionAttributes 1364112c967bd5c862a0f5d7913aa06700c048807db8John McCall setGlobalVisibility(Fn, D, /*ForDef*/ true); 1365112c967bd5c862a0f5d7913aa06700c048807db8John McCall 1366219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 13676379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 13687c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 13697c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 13701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 137140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1372219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 137340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1374219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1375bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1376bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1377f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallvoid CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { 1378f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 137940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1380bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1381bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 13829a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 1383f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1384f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // If there is a definition in the module, then it wins over the alias. 1385f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // This is dubious, but allow it to be safe. Just ignore the alias. 1386f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 1387f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (Entry && !Entry->isDeclaration()) 1388f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return; 13891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1390f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1391bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1392bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1393bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1394bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1395bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 1396f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl()); 1397bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1398f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 139996e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1400bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1401bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 14021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1403bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1404bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1405bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 14061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1407bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1408f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(Entry->isDeclaration()); 1409f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1410bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1411bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1412bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1413bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1414bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1415bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1416bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1417f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GA->takeName(Entry); 14181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14193c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1420bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1421bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1422f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall } else { 14239a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson GA->setName(MangledName); 1424bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 14251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14267c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 14277c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 14287c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 142940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 14307c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 14317c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 143206a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (FD->hasBody()) 14337c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 14347c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 14357c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 14367c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 14371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 143811e8ce7380856abee188b237c2600272df2ed09dRafael Espindola D->hasAttr<WeakRefAttr>() || 143940b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) { 14407c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 14417c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 14427c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 14437c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1444bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1445bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1446b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1447b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 144834771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbarllvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, 144934771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar unsigned BuiltinID) { 14503e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 14511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 14523e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 14531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14543e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 14553e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 14563e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 14573e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 14581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::FunctionType *Ty = 1460386ca78d0b03b1fb519e60d1a14cd12a220364a6Eli Friedman cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); 1461bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 146234771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD)); 1463bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1464bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 14657acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 14667acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 14677acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 14687acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 14697acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1470bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 14711d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 14721d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 14731d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 147470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 14751d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 14761d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 14772f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer llvm::StringRef String = Literal->getString(); 14782f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer unsigned NumBytes = String.size(); 14791d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1480f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1481f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1482f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 14832f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer return Map.GetOrCreateValue(String); 1484f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1485f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 14861d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 14871d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); 14882f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer const UTF8 *FromPtr = (UTF8 *)String.data(); 14891d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 14901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1491e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian (void)ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 1492e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian &ToPtr, ToPtr + NumBytes, 1493e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian strictConversion); 14941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 149570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 14961d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 149770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 149870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 149970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 150070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 150170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 150270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 150370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 150470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 150570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 150670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 150770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 150870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 150970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 151070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 151170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 151270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 151370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1514434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1515434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1516434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 151770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 15181d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 151970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); 15201d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 15211d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 15221d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 15231d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 15241d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 15251d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 15261d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 15271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 152870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 152970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 15301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15311d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 15321d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 15331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15340032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 15350032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 15363e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 15371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15389d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1539c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1540c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 154196e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 15421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 15439d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 15443e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 15453e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 15463c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1547c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 15481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1549e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 15503e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 15511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::StructType *STy = 1552e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1553e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 15545add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 155544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1556c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 15575add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 15581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1559c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 15603e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 15611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 15625add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 15635add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1564c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 15650032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1566a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 156795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1568278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner bool isConstant; 1569a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1570278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 157195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1572278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // Note: -fwritable-strings doesn't make unicode CFStrings writable, but 1573278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // does make plain ascii ones writable. 1574278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = true; 1575a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 157695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::PrivateLinkage; 1577278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = !Features.WritableStrings; 1578a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1579278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 15801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 1581278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 1582278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner ".str"); 1583a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 15844da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 15854da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck GV->setAlignment(Align.getQuantity()); 1586a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 15875add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 15885add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1589c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1590c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 15915add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 15921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1593c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 159408e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 15951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 15961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 159795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 15988e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 15998e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 16001d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 16011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16020c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1603c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 160445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 160533e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanianllvm::Constant * 16064c73307c74764ba99e1379677fe92af72f676531Fariborz JahanianCodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) { 16072bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian unsigned StringLength = 0; 16082bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isUTF16 = false; 16092bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::StringMapEntry<llvm::Constant*> &Entry = 16102bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GetConstantCFStringEntry(CFConstantStringMap, Literal, 16112bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian getTargetData().isLittleEndian(), 16122bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isUTF16, StringLength); 16132bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16142bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (llvm::Constant *C = Entry.getValue()) 16152bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return C; 16162bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16172bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zero = 16182bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 16192bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zeros[] = { Zero, Zero }; 16202bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 1621ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian // If we don't already have it, get _NSConstantStringClassReference. 16224c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (!ConstantStringClassRef) { 16234c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string StringClass(getLangOptions().ObjCConstantStringClass); 16242bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 16252bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Ty = llvm::ArrayType::get(Ty, 0); 16264c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::Constant *GV; 16274c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (StringClass.empty()) 16284c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian GV = CreateRuntimeVariable(Ty, 16294c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Features.ObjCNonFragileABI ? 16304c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian "OBJC_CLASS_$_NSConstantString" : 16314c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian "_NSConstantStringClassReference"); 16324c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian else { 16334c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string str; 16344c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (Features.ObjCNonFragileABI) 16354c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian str = "OBJC_CLASS_$_" + StringClass; 16364c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian else 16374c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian str = "_" + StringClass + "ClassReference"; 16384c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian GV = CreateRuntimeVariable(Ty, str); 16394c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian } 16402bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Decay array -> ptr 16414c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian ConstantStringClassRef = 16424c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 16432bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 16442bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16452bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian QualType NSTy = getContext().getNSConstantStringType(); 16462bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16472bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::StructType *STy = 16482bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian cast<llvm::StructType>(getTypes().ConvertType(NSTy)); 16492bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16502bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian std::vector<llvm::Constant*> Fields(3); 16512bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16522bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Class pointer. 16534c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Fields[0] = ConstantStringClassRef; 16542bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16552bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String pointer. 16562bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 16572bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16582bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage; 16592bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isConstant; 16602bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (isUTF16) { 16612bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME: why do utf strings get "_" labels instead of "L" labels? 16622bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Linkage = llvm::GlobalValue::InternalLinkage; 16632bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Note: -fwritable-strings doesn't make unicode NSStrings writable, but 16642bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // does make plain ascii ones writable. 16652bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isConstant = true; 16662bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } else { 16672bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Linkage = llvm::GlobalValue::PrivateLinkage; 16682bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isConstant = !Features.WritableStrings; 16692bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 16702bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16712bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable *GV = 16722bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 16732bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian ".str"); 16742bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (isUTF16) { 16752bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 16762bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setAlignment(Align.getQuantity()); 16772bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 16782bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 16792bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16802bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String length. 16812bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 16822bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[2] = llvm::ConstantInt::get(Ty, StringLength); 16832bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16842bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // The struct. 16852bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian C = llvm::ConstantStruct::get(STy, Fields); 16862bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 16872bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable::PrivateLinkage, C, 16882bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian "_unnamed_nsstring_"); 16892bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME. Fix section. 1690ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian if (const char *Sect = 1691ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian Features.ObjCNonFragileABI 1692ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian ? getContext().Target.getNSStringNonFragileABISection() 1693ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian : getContext().Target.getNSStringSection()) 16942bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setSection(Sect); 16952bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Entry.setValue(GV); 16962bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16972bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return GV; 169833e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian} 169933e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian 17006143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 17011e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 17026143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 17031e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 17041e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar getContext().getAsConstantArrayType(E->getType()); 17051e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 17061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1707dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 17081e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 17091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1710dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 1711dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner RealLen *= getContext().Target.getWCharWidth()/8; 17121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17132f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer std::string Str = E->getString().str(); 17141e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 17151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17161e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 17171e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 17181e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 17196143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 17206143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 17216143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 17226143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 17236143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 17247eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 17257eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); 17267eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman if (S->isWide()) { 17277eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Type *DestTy = 17287eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); 17297eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman C = llvm::ConstantExpr::getBitCast(C, DestTy); 17307eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 17317eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman return C; 17326143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 17336143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1734eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1735eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1736eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1737eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1738eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1739eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1740a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1741a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1742eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1743eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1744eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1745a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 17461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 174745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 17485fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 17495fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 17506143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 17510032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 17520032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 17531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 175445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 17551257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalVariable *GV = 17561257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 17571257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalValue::PrivateLinkage, 17581257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola C, GlobalName); 17591257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola GV->setUnnamedAddr(true); 17601257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola return GV; 176145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 176245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 17636143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 17646143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 17656143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 17666143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 17676143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 17686143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 17696143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 17706143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 17715fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, 17725fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 17738e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 17748e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 17758e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 17768e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 177795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 17788e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 17798e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 17808e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 17815fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar return GenerateStringLiteral(str, false, *this, GlobalName); 17821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StringMapEntry<llvm::Constant *> &Entry = 178495b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 178545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 178645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1787eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 178845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 178945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 17905fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); 179145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 179245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 179345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 17946143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 17956143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 17966143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 17976143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 17985fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, 17995fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 1800c9f29c61856ffb5f643cedbe87ac076f21a1381aChris Lattner return GetAddrOfConstantString(str + '\0', GlobalName); 18016143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 180241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1803af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1804af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 18051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 1806af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 18071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 180817945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 1809af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 18101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1811af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1812af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1813af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1814af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1815af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1816af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1817af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1818af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1819af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 182017945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 1821fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1822fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1823af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 182417945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 1825fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1826fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1827af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1828af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1829af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1830af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1831109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// EmitObjCIvarInitializations - Emit information for ivar initialization 1832109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// for an implementation. 1833109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanianvoid CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { 1834109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian if (!Features.NeXTRuntime || D->getNumIvarInitializers() == 0) 1835109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian return; 1836109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian DeclContext* DC = const_cast<DeclContext*>(dyn_cast<DeclContext>(D)); 1837109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian assert(DC && "EmitObjCIvarInitializations - null DeclContext"); 1838109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); 1839109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 1840109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *DTORMethod = ObjCMethodDecl::Create(getContext(), 1841109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 1842109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 1843109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().VoidTy, 0, 18443fe104154dd2e8ffb351142d74f308938b5c99bfFariborz Jahanian DC, true, false, true, false, 1845109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 1846109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(DTORMethod); 1847109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); 1848109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1849109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian II = &getContext().Idents.get(".cxx_construct"); 1850109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian cxxSelector = getContext().Selectors.getSelector(0, &II); 1851109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian // The constructor returns 'self'. 1852109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), 1853109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 1854109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 1855109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().getObjCIdType(), 0, 18563fe104154dd2e8ffb351142d74f308938b5c99bfFariborz Jahanian DC, true, false, true, false, 1857109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 1858109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(CTORMethod); 1859109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); 1860109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1861109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1862109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian} 1863109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 186491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 1865984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 186617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 1867984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 1868984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 1869984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 1870984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 187191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 187291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 1873f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 1874f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 187591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 187691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 187791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 187891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 187917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 188091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 188191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 188291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 188391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 188441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 188541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 188641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 188741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 188841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 188941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 189041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 189141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 189216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 189316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 189416e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 18951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 189641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 1897293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 18982b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 189941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 190016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 190116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 190216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 19031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1904555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 1905555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 1906555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 190741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 1908555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 190941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 191041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 191195d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 191241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 1913984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 191441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 19159cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 19169d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 19179cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 1918dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 1919127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 1920127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 1921018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 19229cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 192395d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 19241fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 19251fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 19261fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 19271fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 192895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 192995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 193027ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 193127ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 193227ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 193336674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 193436674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 193536674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 193636674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 193736674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 193895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 19391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 194038e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 194141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 194241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 1943b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 194441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1945000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 1946000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian case Decl::ObjCCategory: { 1947000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D); 1948000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (CD->IsClassExtension() && CD->hasSynthBitfield()) 1949000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(CD->getClassInterface()); 1950000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian break; 1951000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian } 1952000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 1953285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 195441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 1955b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 195641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 195741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 195841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 1959af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 1960af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 196141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 196241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 196341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1964af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 1965af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 1966000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (Features.ObjCNonFragileABI2 && OMD->hasSynthBitfield()) 1967000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(OMD->getClassInterface()); 1968af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 1969109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian EmitObjCIvarInitializations(OMD); 1970af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 197141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 19721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 197341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 197441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 197541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 19766fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 197741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 197841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 197941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 19801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 1981305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 198241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 198341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 198491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 198591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 198641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 198741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 198841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 198941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 19908d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer llvm::StringRef AsmString = AD->getAsmString()->getString(); 19911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 199241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 199341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 199441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 199541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 19968d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 199741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 199841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 19991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 2001f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 2002f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 2003f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 200441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 200541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 200641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 2007744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2008744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Turns the given pointer into a constant. 2009744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, 2010744016dde06fcffd50931e94a98c850f8b12cd87John McCall const void *Ptr) { 2011744016dde06fcffd50931e94a98c850f8b12cd87John McCall uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); 2012744016dde06fcffd50931e94a98c850f8b12cd87John McCall const llvm::Type *i64 = llvm::Type::getInt64Ty(Context); 2013744016dde06fcffd50931e94a98c850f8b12cd87John McCall return llvm::ConstantInt::get(i64, PtrInt); 2014744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2015744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2016744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic void EmitGlobalDeclMetadata(CodeGenModule &CGM, 2017744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *&GlobalMetadata, 2018744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl D, 2019744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr) { 2020744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (!GlobalMetadata) 2021744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata = 2022744016dde06fcffd50931e94a98c850f8b12cd87John McCall CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); 2023744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2024744016dde06fcffd50931e94a98c850f8b12cd87John McCall // TODO: should we report variant information for ctors/dtors? 2025744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Ops[] = { 2026744016dde06fcffd50931e94a98c850f8b12cd87John McCall Addr, 2027744016dde06fcffd50931e94a98c850f8b12cd87John McCall GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) 2028744016dde06fcffd50931e94a98c850f8b12cd87John McCall }; 2029744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops, 2)); 2030744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2031744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2032744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes associating all the global values in the 2033744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// current module with the Decls they came from. This is useful for 2034744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// projects using IR gen as a subroutine. 2035744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// 2036744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Since there's currently no way to associate an MDNode directly 2037744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with an llvm::GlobalValue, we create a global named metadata 2038744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with the name 'clang.global.decl.ptrs'. 2039744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenModule::EmitDeclMetadata() { 2040744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2041744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2042744016dde06fcffd50931e94a98c850f8b12cd87John McCall // StaticLocalDeclMap 2043744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<GlobalDecl,llvm::StringRef>::iterator 2044744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = MangledDeclNames.begin(), E = MangledDeclNames.end(); 2045744016dde06fcffd50931e94a98c850f8b12cd87John McCall I != E; ++I) { 2046744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); 2047744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); 2048744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2049744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2050744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2051744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes for all the local variables in the current 2052744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// function. 2053744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenFunction::EmitDeclMetadata() { 2054744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (LocalDeclMap.empty()) return; 2055744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2056744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::LLVMContext &Context = getLLVMContext(); 2057744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2058744016dde06fcffd50931e94a98c850f8b12cd87John McCall // Find the unique metadata ID for this name. 2059744016dde06fcffd50931e94a98c850f8b12cd87John McCall unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); 2060744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2061744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2062744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2063744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator 2064744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { 2065744016dde06fcffd50931e94a98c850f8b12cd87John McCall const Decl *D = I->first; 2066744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Addr = I->second; 2067744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2068744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { 2069744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); 2070744016dde06fcffd50931e94a98c850f8b12cd87John McCall Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, &DAddr, 1)); 2071744016dde06fcffd50931e94a98c850f8b12cd87John McCall } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { 2072744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); 2073744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); 2074744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2075744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2076744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2077673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2078673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@name Custom Runtime Function Interfaces 2079673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@{ 2080673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// 2081673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// FIXME: These can be eliminated once we can have clients just get the required 2082673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// AST nodes from the builtin tables. 2083673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2084673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectDispose() { 2085673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectDispose) 2086673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose; 2087673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2088754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2089754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectDisposeDecl) { 2090754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectDispose = GetAddrOfFunction( 2091754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl, 2092754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectDisposeDecl)); 2093754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2094754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2095754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2096673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::FunctionType *FTy; 2097673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar std::vector<const llvm::Type*> ArgTys; 2098673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); 2099673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(PtrToInt8Ty); 2100673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); 2101673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar FTy = llvm::FunctionType::get(ResultType, ArgTys, false); 2102673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose = 2103673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CreateRuntimeFunction(FTy, "_Block_object_dispose"); 2104673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2105673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2106673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectAssign() { 2107673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectAssign) 2108673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign; 2109673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2110754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2111754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectAssignDecl) { 2112754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectAssign = GetAddrOfFunction( 2113754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl, 2114754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectAssignDecl)); 2115754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2116754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2117754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2118673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::FunctionType *FTy; 2119673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar std::vector<const llvm::Type*> ArgTys; 2120673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); 2121673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(PtrToInt8Ty); 2122673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(PtrToInt8Ty); 2123673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); 2124673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar FTy = llvm::FunctionType::get(ResultType, ArgTys, false); 2125673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign = 2126673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CreateRuntimeFunction(FTy, "_Block_object_assign"); 2127673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2128673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2129673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteGlobalBlock() { 2130673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteGlobalBlock) 2131673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteGlobalBlock; 2132754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2133754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2134754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteGlobalBlockDecl) { 2135754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteGlobalBlock = GetAddrOfGlobalVar( 2136754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl, 2137754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteGlobalBlockDecl->getType())); 2138754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2139754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2140754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2141673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteGlobalBlock = CreateRuntimeVariable( 2142673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar PtrToInt8Ty, "_NSConcreteGlobalBlock"); 2143673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2144673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2145673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteStackBlock() { 2146673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteStackBlock) 2147673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteStackBlock; 2148754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2149754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2150754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteStackBlockDecl) { 2151754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteStackBlock = GetAddrOfGlobalVar( 2152754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl, 2153754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteStackBlockDecl->getType())); 2154754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2155754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2156754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2157673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteStackBlock = CreateRuntimeVariable( 2158673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar PtrToInt8Ty, "_NSConcreteStackBlock"); 2159673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2160673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2161673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@} 2162