CodeGenModule.cpp revision c532b502858032f377056dc8cba2fe43cba8702b
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" 2182d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov#include "TargetInfo.h" 2206057cef0bcd7804e80f3ce2bbe352178396c715Chandler Carruth#include "clang/Frontend/CodeGenOptions.h" 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 24687cc4a850b59116efee061018f0d8df50728b82Ken Dyck#include "clang/AST/CharUnits.h" 25c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2621ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 27af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor#include "clang/AST/DeclTemplate.h" 2814110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne#include "clang/AST/Mangle.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); 254b1c65ff108de47a89585ad37874bd6cb232664cdRafael Espindola GV->setUnnamedAddr(true); 255cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall} 256cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 257793a990774826a0c20b0da66cec0991badfb8b63Anders Carlssonllvm::StringRef CodeGenModule::getMangledName(GlobalDecl GD) { 258793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 259793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 260793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; 261793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (!Str.empty()) 262793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 263793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 2644c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall if (!getCXXABI().getMangleContext().shouldMangleDeclName(ND)) { 265793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson IdentifierInfo *II = ND->getIdentifier(); 266793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson assert(II && "Attempt to mangle unnamed decl."); 267793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 268793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = II->getName(); 269793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 270793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson } 271793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 272793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::SmallString<256> Buffer; 273793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 2744c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Buffer); 275793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 2764c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Buffer); 277793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const BlockDecl *BD = dyn_cast<BlockDecl>(ND)) 27814110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne getCXXABI().getMangleContext().mangleBlock(BD, Buffer); 279793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else 2804c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall getCXXABI().getMangleContext().mangleName(ND, Buffer); 281793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 282793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson // Allocate space for the mangled name. 283793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson size_t Length = Buffer.size(); 284793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson char *Name = MangledNamesAllocator.Allocate<char>(Length); 285793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson std::copy(Buffer.begin(), Buffer.end(), Name); 286793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 287793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = llvm::StringRef(Name, Length); 288793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 289793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 290793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson} 291793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 29214110477887e3dc168ffc6c191e72d705051f99ePeter Collingbournevoid CodeGenModule::getBlockMangledName(GlobalDecl GD, MangleBuffer &Buffer, 29314110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const BlockDecl *BD) { 29414110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleContext &MangleCtx = getCXXABI().getMangleContext(); 29514110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const Decl *D = GD.getDecl(); 29614110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne if (D == 0) 29714110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleCtx.mangleGlobalBlock(BD, Buffer.getBuffer()); 29814110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 29914110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleCtx.mangleCtorBlock(CD, GD.getCtorType(), BD, Buffer.getBuffer()); 30014110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 30114110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleCtx.mangleDtorBlock(DD, GD.getDtorType(), BD, Buffer.getBuffer()); 30214110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else 30314110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleCtx.mangleBlock(cast<DeclContext>(D), BD, Buffer.getBuffer()); 3049a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson} 3059a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson 306f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::GlobalValue *CodeGenModule::GetGlobalValue(llvm::StringRef Name) { 307f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return getModule().getNamedValue(Name); 3085f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 3095f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 3106d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 3116d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 3126bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 31349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3146bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 3156d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3166d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 3176bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 3186bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 3196bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 32049988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3216bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 3226bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 3236bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3246bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 3256bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 3266bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 3271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 3286bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<const llvm::Type*>(), 3296bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar false); 33096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 3316bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3326bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 3331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType* CtorStructTy = 3341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StructType::get(VMContext, llvm::Type::getInt32Ty(VMContext), 33596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 3366bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3376bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 3386bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 3396bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 3406bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 3411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 3420032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 3433c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 34408e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 3456bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 3466bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3476bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 34896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 3491c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 350572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 3517db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 3521c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 3536d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 3546d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3556d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 356532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 357532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 358532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 359532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 360532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 361532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 36296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 363532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 364532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 3651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *gv = 3661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(TheModule, Array->getType(), false, 3671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::AppendingLinkage, Array, 3681c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.global.annotations"); 369532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 370532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 371532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 372d46f98573ba104eda102dd3224b2dca69f1c6336John McCallllvm::GlobalValue::LinkageTypes 373d46f98573ba104eda102dd3224b2dca69f1c6336John McCallCodeGenModule::getFunctionLinkage(const FunctionDecl *D) { 37490e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); 3757c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 376f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_Internal) 377d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::InternalLinkage; 378f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 379f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<DLLExportAttr>()) 380d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::DLLExportLinkage; 381f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 382f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<WeakAttr>()) 383d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::WeakAnyLinkage; 384f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 385f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 386f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition somewhere else, so we can use available_externally linkage. 387f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_C99Inline) 388d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::AvailableExternallyLinkage; 389f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 390f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C++, the compiler has to emit a definition in every translation unit 391f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // that references the function. We should use linkonce_odr because 392f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // a) if all references in this translation unit are optimized away, we 393f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 394f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 395f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition is dependable. 396f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 397d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::LinkOnceODRLinkage; 398f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 399f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // An explicit instantiation of a template has weak linkage, since 400f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // explicit instantiations can occur in multiple translation units 401f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // and must all be equivalent. However, we are not allowed to 402f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // throw away these explicit instantiations. 403f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_ExplicitTemplateInstantiation) 4048f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor return llvm::Function::WeakODRLinkage; 405f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 406f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // Otherwise, we have strong external linkage. 407f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner assert(Linkage == GVA_StrongExternal); 408f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner return llvm::Function::ExternalLinkage; 409d46f98573ba104eda102dd3224b2dca69f1c6336John McCall} 410d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 411d46f98573ba104eda102dd3224b2dca69f1c6336John McCall 412d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// SetFunctionDefinitionAttributes - Set attributes for a global. 413d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// 414d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// FIXME: This is currently only done for aliases and functions, but not for 415d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// variables (these details are set in EmitGlobalVarDefinition for variables). 416d46f98573ba104eda102dd3224b2dca69f1c6336John McCallvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 417d46f98573ba104eda102dd3224b2dca69f1c6336John McCall llvm::GlobalValue *GV) { 4187c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 419d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 420d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 4217dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 4221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 4237dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 424ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 425761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 426ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 427761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 428ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 429ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 430f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 431f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4327c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 4337c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 43474ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 4351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 436af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 43740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<AlwaysInlineAttr>()) 438af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 4391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 440dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar if (D->hasAttr<NakedAttr>()) 441dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar F->addFnAttr(llvm::Attribute::Naked); 442dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar 4431feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 44481ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 445f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 446c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) 447c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola F->setUnnamedAddr(true); 448c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola 449fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson if (Features.getStackProtectorMode() == LangOptions::SSPOn) 450fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 451fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson else if (Features.getStackProtectorMode() == LangOptions::SSPReq) 452fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 453fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 454cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); 455cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt if (alignment) 456cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt F->setAlignment(alignment); 457cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt 458fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 459bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 460bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 461f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 462f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 4631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 4647c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 4651fb0caaa7bef765b85972274e3b434af2572c141John McCall if (isa<NamedDecl>(D)) 466af14603ca61757cf4361b583b45639a04c57e651John McCall setGlobalVisibility(GV, cast<NamedDecl>(D), /*ForDef*/ true); 4671fb0caaa7bef765b85972274e3b434af2572c141John McCall else 4681fb0caaa7bef765b85972274e3b434af2572c141John McCall GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 4697c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 47040b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 4717c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 4727c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 47340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 4747c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 47582d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 47682d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); 4777c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 4787c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4790e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 4800e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 4810e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 4820e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 4830e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 4847c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4857c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 4867c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 4870e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 488f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 489f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 490b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlssonvoid CodeGenModule::SetFunctionAttributes(GlobalDecl GD, 491c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 492c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 493b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); 494b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson 495c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 496b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); 4971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4987c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 4997c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 5001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 50140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 5027c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 5031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 50440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis FD->hasAttr<WeakImportAttr>()) { 5057c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 5061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 5077c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 5087c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 5091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 510af14603ca61757cf4361b583b45639a04c57e651John McCall 511af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = FD->getLinkageAndVisibility(); 512af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() == ExternalLinkage && LV.visibilityExplicit()) { 513af14603ca61757cf4361b583b45639a04c57e651John McCall F->setVisibility(GetLLVMVisibility(LV.visibility())); 514af14603ca61757cf4361b583b45639a04c57e651John McCall } 5157c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 5167c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 51740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 5187c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 519219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 520219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 5210269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 5221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 5230269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 52435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 5250269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5260269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5270269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 5280269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 529ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 5300269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 5310269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5323c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 5331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 53435f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 53535f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 53635f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 53735f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 5381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 5391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 540a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 54135f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 5421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 543c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 544c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 54596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 5461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 5481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 5490269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 5507db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 5511c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 5520269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5530269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 5540269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 5550269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 5560269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 55767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 55867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 55967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // for a static function, iterate until no changes are made. 560bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 561046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson while (!DeferredDeclsToEmit.empty() || !DeferredVTables.empty()) { 562046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson if (!DeferredVTables.empty()) { 563046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson const CXXRecordDecl *RD = DeferredVTables.back(); 564046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson DeferredVTables.pop_back(); 565046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson getVTables().GenerateClassData(getVTableLinkage(RD), RD); 566bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola continue; 567bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola } 568bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 5692a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 57067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 57167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 572c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // Check to see if we've already emitted this. This is necessary 573c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // for a couple of reasons: first, decls can end up in the 574c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // deferred-decls queue multiple times, and second, decls can end 575c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // up with definitions in unusual ways (e.g. by an extern inline 576c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // function acquiring a strong function redefinition). Just 577c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // ignore these cases. 578c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // 579c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // TODO: That said, looking this up multiple times is very wasteful. 5809a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef Name = getMangledName(D); 581f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *CGRef = GetGlobalValue(Name); 58267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 5831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 58467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 58567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 5861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 587c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // GlobalAlias::isDeclaration() defers to the aliasee, but for our 588c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // purposes an alias counts as a definition. 589c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall if (isa<llvm::GlobalAlias>(CGRef)) 590c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall continue; 591c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall 59267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 59367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 59467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 5988bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 5991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 6001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// GlobalValue being annotated. The second field is the constant string 6011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// created from the AnnotateAttr's annotation. The third field is a constant 6028bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 6038bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 6048bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6058bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 6068bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 6078bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 6081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 6098bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 6108bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 6118bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 6128bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6138bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 6148bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 6153c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *SBP = llvm::Type::getInt8PtrTy(VMContext); 6161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *anno = llvm::ConstantArray::get(VMContext, 6170032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson AA->getAnnotation(), true); 6180032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *unit = llvm::ConstantArray::get(VMContext, 6190032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson M->getModuleIdentifier(), 6208bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 6218bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 6228bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 6238bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 6241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *annoGV = 62595b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, anno->getType(), false, 62695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::PrivateLinkage, anno, 62795b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GV->getName()); 6288bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 6298bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 63095b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner new llvm::GlobalVariable(*M, unit->getType(), false, 6311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue::PrivateLinkage, unit, 63295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ".str"); 633d3d4e1ee398748468cbaaddb3b0af5953f043803Rafael Espindola unitGV->setUnnamedAddr(true); 6348bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 63557d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 6368bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 6373c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, SBP), 6383c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(annoGV, SBP), 6393c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(unitGV, SBP), 6400032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo) 6418bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 64247a434ff3d49e7906eda88e8e8242e4297725b32Owen Anderson return llvm::ConstantStruct::get(VMContext, Fields, 4, false); 6438bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 6448bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 645a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidisbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 64690e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis // Never defer when EmitAllDecls is specified. 64790e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis if (Features.EmitAllDecls) 648a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidis return false; 6490b6bc8bd7a1d2a7d7478d13d78cff94cacad61fcDouglas Gregor 6504ac7c0bb39696e92fd220118fedc484c09a69870Argyrios Kyrtzidis return !getContext().DeclMustBeEmitted(Global); 65173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 65273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 6536a836706c40a31c716952b74785102c90fd6afa7Rafael Espindolallvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { 6546a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const AliasAttr *AA = VD->getAttr<AliasAttr>(); 6556a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola assert(AA && "No alias?"); 6566a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6576a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); 6586a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6596a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // See if there is already something with the target's name in the module. 660f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); 6616a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6626a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::Constant *Aliasee; 6636a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (isa<llvm::FunctionType>(DeclTy)) 664f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl()); 6656a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola else 666f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 6676a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::PointerType::getUnqual(DeclTy), 0); 6686a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (!Entry) { 6696a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); 6706a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola F->setLinkage(llvm::Function::ExternalWeakLinkage); 6716a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.insert(F); 6726a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 6736a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 6746a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return Aliasee; 6756a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola} 6766a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 677b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 6784a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 6791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6806a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // Weak references don't produce any output by themselves. 6816a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (Global->hasAttr<WeakRefAttr>()) 6826a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return; 6836a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 684bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 685bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 68640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 687f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return EmitAliasDefinition(GD); 688219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 68967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 6905e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 691754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (FD->getIdentifier()) { 692754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = FD->getName(); 693754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_Block_object_assign") { 694754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl = FD; 695754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_Block_object_dispose") { 696754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl = FD; 697754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 698754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 699754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 70073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 70173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 70273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7030269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 7040269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 705bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 706bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 707754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (VD->getIdentifier()) { 708754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar llvm::StringRef Name = VD->getName(); 709754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (Name == "_NSConcreteGlobalBlock") { 710754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl = VD; 711754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } else if (Name == "_NSConcreteStackBlock") { 712754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl = VD; 713754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 714754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 715754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 716754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 717a9a55c063e9e59c6ab0a6d7a21302660f7bde9f9Douglas Gregor if (VD->isThisDeclarationADefinition() != VarDecl::Definition) 71873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 7194c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 7204c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 72167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 72267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 7234357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (!MayDeferGeneration(Global)) { 7244357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Emit the definition if it can't be deferred. 7254357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner EmitGlobalDefinition(GD); 726bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 727bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 728bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall 729bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // If we're deferring emission of a C++ variable with an 730bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer, remember the order in which it appeared in the file. 731bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus && isa<VarDecl>(Global) && 732bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall cast<VarDecl>(Global)->hasInit()) { 733bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); 734bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall CXXGlobalInits.push_back(0); 735bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } 7364357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 7374357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // If the value has already been used, add it directly to the 7384357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit list. 7399a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 7404357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (GetGlobalValue(MangledName)) 7414357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDeclsToEmit.push_back(GD); 7424357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner else { 7434357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 7444357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // first use of the mangled name will cause it to move into 7454357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit. 7464357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDecls[MangledName] = GD; 7474357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner } 7484c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 7494c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 750b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 7514a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 7521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 753cb421fa690da545b58a720abe5f1c49b166dbde7Dan Gohman PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), 7548e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 7558e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 7568e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 75744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 75844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // At -O0, don't generate IR for functions with available_externally 75944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // linkage. 7607feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor if (CodeGenOpts.OptimizationLevel == 0 && 7617feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor !Function->hasAttr<AlwaysInlineAttr>() && 76244eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getFunctionLinkage(Function) 76344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor == llvm::Function::AvailableExternallyLinkage) 76444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return; 76544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor 76644eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { 76744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (Method->isVirtual()) 76844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getVTables().EmitThunks(GD); 7697270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson 77044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) 77144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return EmitCXXConstructor(CD, GD.getCtorType()); 7724357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 77344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(Method)) 77444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return EmitCXXDestructor(DD, GD.getDtorType()); 77544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 776b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 777b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalFunctionDefinition(GD); 77844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 779b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 780b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 781b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalVarDefinition(VD); 7824357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 7834357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner assert(0 && "Invalid argument to EmitGlobalDefinition()"); 784bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 785bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 78674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 78774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 78874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 78974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 79074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 79174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 79274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 793f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 794f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMFunction(llvm::StringRef MangledName, 795f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *Ty, 796f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GlobalDecl D) { 7970558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 798f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 7990558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 8006a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 8016a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); 8026a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (FD && !FD->hasAttr<WeakAttr>()) 8037270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 8046a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8056a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 8066a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 8076a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 8080558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 8090558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 8101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8110558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 81296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 8133c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, PTy); 8140558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 8151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 816654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 817654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 818654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 819654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 820784f21121a6c9418ebd86baa6814e36e1176c410John McCall 821784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::FunctionType *FTy; 822784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (isa<llvm::FunctionType>(Ty)) { 823784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = cast<llvm::FunctionType>(Ty); 824784f21121a6c9418ebd86baa6814e36e1176c410John McCall } else { 825784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = llvm::FunctionType::get(llvm::Type::getVoidTy(VMContext), 826784f21121a6c9418ebd86baa6814e36e1176c410John McCall std::vector<const llvm::Type*>(), false); 827654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 828654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 829bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 830784f21121a6c9418ebd86baa6814e36e1176c410John McCall llvm::Function *F = llvm::Function::Create(FTy, 831654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 832f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall MangledName, &getModule()); 833f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(F->getName() == MangledName && "name was uniqued!"); 834654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 835b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetFunctionAttributes(D, F, IsIncompleteFunction); 836654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 83767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 83867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 83967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 840f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 84167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 84267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 84367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 84467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 84567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 846bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall 847bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Otherwise, there are cases we have to worry about where we're 848bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // using a declaration for which we must emit a definition but where 849bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // we might not find a top-level definition: 850bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - member functions defined inline in their classes 851bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - friend functions defined inline in some class 852bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - special member functions with implicit definitions 853bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // If we ever change our AST traversal to walk into class methods, 854bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // this will be unnecessary. 855bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } else if (getLangOptions().CPlusPlus && D.getDecl()) { 856bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Look for a declaration that's lexically in a record. 857bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall const FunctionDecl *FD = cast<FunctionDecl>(D.getDecl()); 858bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall do { 859bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { 860bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall if (FD->isImplicit()) { 861bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall assert(FD->isUsed() && "Sema didn't mark implicit function as used!"); 862bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall DeferredDeclsToEmit.push_back(D); 863bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 864bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } else if (FD->isThisDeclarationADefinition()) { 865bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall DeferredDeclsToEmit.push_back(D); 866bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 867bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } 8687b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 869bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall FD = FD->getPreviousDeclaration(); 870bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } while (FD); 87167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 8721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 873784f21121a6c9418ebd86baa6814e36e1176c410John McCall // Make sure the result is of the requested type. 874784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (!IsIncompleteFunction) { 875784f21121a6c9418ebd86baa6814e36e1176c410John McCall assert(F->getType()->getElementType() == Ty); 876784f21121a6c9418ebd86baa6814e36e1176c410John McCall return F; 877784f21121a6c9418ebd86baa6814e36e1176c410John McCall } 878784f21121a6c9418ebd86baa6814e36e1176c410John McCall 879784f21121a6c9418ebd86baa6814e36e1176c410John McCall const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 880784f21121a6c9418ebd86baa6814e36e1176c410John McCall return llvm::ConstantExpr::getBitCast(F, PTy); 8810558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 8820558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 88374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 88474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 88574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 886b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 88774391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 88874391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 88974391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 8904a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 891bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 8929a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 893f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMFunction(MangledName, Ty, GD); 89474391b48b4791cded373683a3baf67314f358d50Chris Lattner} 89577ba708819285931932ecd33691a672bb59d221aEli Friedman 89674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 89774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 89874391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 89974391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 900f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 901b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl()); 90274391b48b4791cded373683a3baf67314f358d50Chris Lattner} 903bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 90420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedmanstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D) { 90588786862424cb2d478516d911709dc19c962af9cJohn McCall if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) 90620e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 90720e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman if (Context.getLangOptions().CPlusPlus && 90820e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman Context.getBaseElementType(D->getType())->getAs<RecordType>()) { 90920e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman // FIXME: We should do something fancier here! 91020e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 91120e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 91220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 91320e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 91420e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 91574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 91674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 91774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 91874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 91974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 92074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 92174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 922f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 923f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallCodeGenModule::GetOrCreateLLVMGlobal(llvm::StringRef MangledName, 924f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::PointerType *Ty, 925c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola const VarDecl *D, 926c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola bool UnnamedAddr) { 9273c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 928f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 92999b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 9306a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 9316a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (D && !D->hasAttr<WeakAttr>()) 9327270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 9336a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 9346a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 9356a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 9366a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 937c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola if (UnnamedAddr) 938c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola Entry->setUnnamedAddr(true); 939c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola 94074391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 941570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 9421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 94399b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 9443c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 94599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 9461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 94767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 94867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 94967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 950f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 95167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 95267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 95367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 95467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 95567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 95667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 9571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 9591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 96099b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 961f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 0, MangledName, 0, 96256ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 96349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 96499b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 96574391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 966f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 967f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 96820e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman GV->setConstant(DeclIsConstantGlobal(Context, D)); 96949988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 970110e8e56af30363072c140285961592b0107f789John McCall // Set linkage and visibility in case we never see a definition. 971af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 972af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() != ExternalLinkage) { 973110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::InternalLinkage); 974110e8e56af30363072c140285961592b0107f789John McCall } else { 975110e8e56af30363072c140285961592b0107f789John McCall if (D->hasAttr<DLLImportAttr>()) 976110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::DLLImportLinkage); 977110e8e56af30363072c140285961592b0107f789John McCall else if (D->hasAttr<WeakAttr>() || D->hasAttr<WeakImportAttr>()) 978110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 979110e8e56af30363072c140285961592b0107f789John McCall 980af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility on a declaration only if it's explicit. 981af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.visibilityExplicit()) 982af14603ca61757cf4361b583b45639a04c57e651John McCall GV->setVisibility(GetLLVMVisibility(LV.visibility())); 983110e8e56af30363072c140285961592b0107f789John McCall } 98456ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 98556ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 98674391b48b4791cded373683a3baf67314f358d50Chris Lattner } 9871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 988f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GV; 98974391b48b4791cded373683a3baf67314f358d50Chris Lattner} 990eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 991eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 99274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 99374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 99474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 99574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 99674391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 99774391b48b4791cded373683a3baf67314f358d50Chris Lattner const llvm::Type *Ty) { 99874391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 99974391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 100074391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 100174391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 10021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::PointerType *PTy = 100496e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 1005f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 10069a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1007f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMGlobal(MangledName, PTy, D); 100874391b48b4791cded373683a3baf67314f358d50Chris Lattner} 10093f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 101074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 101174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 101274391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 101374391b48b4791cded373683a3baf67314f358d50Chris LattnerCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 1014f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringRef Name) { 1015c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0, 1016c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola true); 1017bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1018bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 101903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 102003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 102103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 10227520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 10237520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 10247520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 10257520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 10269a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(D); 1027f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (!GetGlobalValue(MangledName)) { 1028555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 102903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 10307520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 10317520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 10327520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 10337520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 103403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 103503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 103603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 10376fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregorvoid CodeGenModule::EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired) { 10386fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor if (DefinitionRequired) 10396fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor getVTables().GenerateClassData(getVTableLinkage(Class), Class); 10406fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor} 10416fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor 10424b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregorllvm::GlobalVariable::LinkageTypes 1043046c294a43024874ff35656c6e785b64e72f1f36Anders CarlssonCodeGenModule::getVTableLinkage(const CXXRecordDecl *RD) { 1044dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (RD->isInAnonymousNamespace() || !RD->hasLinkage()) 1045dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::InternalLinkage; 1046dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1047dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (const CXXMethodDecl *KeyFunction 1048dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor = RD->getASTContext().getKeyFunction(RD)) { 1049dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // If this class has a key function, use that to determine the linkage of 1050dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // the vtable. 10514b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor const FunctionDecl *Def = 0; 105206a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (KeyFunction->hasBody(Def)) 10534b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor KeyFunction = cast<CXXMethodDecl>(Def); 1054dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 10554b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor switch (KeyFunction->getTemplateSpecializationKind()) { 10564b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_Undeclared: 10574b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitSpecialization: 10584b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->isInlined()) 10594b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10604b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10614b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::ExternalLinkage; 10624b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10634b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ImplicitInstantiation: 10644b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDefinition: 10654b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10664b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10674b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 10684b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // FIXME: Use available_externally linkage. However, this currently 10694b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // breaks LLVM's build due to undefined symbols. 10704b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 10714b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10724b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 1073dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor } 1074dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1075dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor switch (RD->getTemplateSpecializationKind()) { 1076dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_Undeclared: 1077dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitSpecialization: 1078dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ImplicitInstantiation: 1079dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitInstantiationDefinition: 1080dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 1081dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1082dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitInstantiationDeclaration: 1083dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // FIXME: Use available_externally linkage. However, this currently 1084dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // breaks LLVM's build due to undefined symbols. 1085dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 10864b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10874b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 10884b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 10894b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // Silence GCC warning. 10904b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::WeakODRLinkage; 10914b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor} 10924b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 1093687cc4a850b59116efee061018f0d8df50728b82Ken DyckCharUnits CodeGenModule::GetTargetTypeStoreSize(const llvm::Type *Ty) const { 109406f486ecd05bd6788da97c39164c1903a084c26dKen Dyck return Context.toCharUnitsFromBits( 109506f486ecd05bd6788da97c39164c1903a084c26dKen Dyck TheTargetData.getTypeStoreSizeInBits(Ty)); 1096687cc4a850b59116efee061018f0d8df50728b82Ken Dyck} 1097687cc4a850b59116efee061018f0d8df50728b82Ken Dyck 1098bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 10998f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 110077ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 11016c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman bool NonConstInit = false; 11021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 110331310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl const Expr *InitExpr = D->getAnyInitializer(); 11043bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson 11053bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson if (!InitExpr) { 1106cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 110703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 110803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 110903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 111003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 111103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 111203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 111303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 111403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 111503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 1116b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 111777ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 1118c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor Init = EmitConstantExpr(InitExpr, D->getType()); 11196e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 11203bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson QualType T = InitExpr->getType(); 1121c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor if (D->getType()->isReferenceType()) 1122c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor T = D->getType(); 1123c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor 112489ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 112589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 11266c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman NonConstInit = true; 112789ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 112889ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 112989ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 113089ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 1131bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } else { 1132bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // We don't need an initializer, so remove the entry for the delayed 1133bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer position (just in case this entry was delayed). 1134bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus) 1135bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition.erase(D); 11366e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 11378f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 11388e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 11392d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 1140570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 11411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1142570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 1143570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 11449d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 11459d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 11469d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 1147570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 1148570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 11491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1150570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 1151570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 11521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1153570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 1154570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 1155570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 1156570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 1157570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 1158570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 1159570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 1160570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 1161570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 1162570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 1163570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 1164570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getAddressSpace() != ASTTy.getAddressSpace()) { 11651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1166f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // Move the old entry aside so that we'll create a new one. 1167f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Entry->setName(llvm::StringRef()); 1168232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 1169570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 1170570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 11710558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 117277ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 11731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 11743c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 1175570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 117677ba708819285931932ecd33691a672bb59d221aEli Friedman 117777ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 1178570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 117977ba708819285931932ecd33691a672bb59d221aEli Friedman } 118077ba708819285931932ecd33691a672bb59d221aEli Friedman 118140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 11828bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 11838bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 1184f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 11858bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 11868bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 118788a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 1188e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 1189e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 1190e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 11916c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman if (!NonConstInit && DeclIsConstantGlobal(Context, D)) 1192e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 11931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11948b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); 1195354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 119688a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 1197354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage = 1198354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GetLLVMLinkageVarDefinition(D, GV); 1199354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setLinkage(Linkage); 1200354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian if (Linkage == llvm::GlobalVariable::CommonLinkage) 1201354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // common vars aren't constant even if declared const. 1202354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setConstant(false); 1203354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1204354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian SetCommonAttributes(D, GV); 1205354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 12063030eb82593097502469a8b3fc26112c79c75605John McCall // Emit the initializer function if necessary. 12073030eb82593097502469a8b3fc26112c79c75605John McCall if (NonConstInit) 12083030eb82593097502469a8b3fc26112c79c75605John McCall EmitCXXGlobalVarDeclInitFunc(D, GV); 12093030eb82593097502469a8b3fc26112c79c75605John McCall 1210354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // Emit global variable debug information. 1211354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian if (CGDebugInfo *DI = getDebugInfo()) { 1212354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->setLocation(D->getLocation()); 1213354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->EmitGlobalVariable(GV, D); 1214354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian } 1215354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian} 1216354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1217354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanianllvm::GlobalValue::LinkageTypes 1218354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz JahanianCodeGenModule::GetLLVMLinkageVarDefinition(const VarDecl *D, 1219354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalVariable *GV) { 122090e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); 1221a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 1222354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::InternalLinkage; 122340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1224354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLImportLinkage; 122540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1226354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLExportLinkage; 1227e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1228e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1229354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 1230e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1231354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 12328f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor } else if (Linkage == GVA_TemplateInstantiation || 12338f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor Linkage == GVA_ExplicitTemplateInstantiation) 12348f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor // FIXME: It seems like we can provide more specific linkage here 12358f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor // (LinkOnceODR, WeakODR). 1236354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 1237a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher else if (!getLangOptions().CPlusPlus && 1238a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher ((!CodeGenOpts.NoCommon && !D->getAttr<NoCommonAttr>()) || 1239a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher D->getAttr<CommonAttr>()) && 1240309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 124191f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher !D->getAttr<SectionAttr>() && !D->isThreadSpecified()) { 124291f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher // Thread local vars aren't considered common linkage. 1243354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::CommonLinkage; 1244686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 1245354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::ExternalLinkage; 124688a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 12475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1248bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1249bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1250bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1251bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1252bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1253bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1254bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1255bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1256bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1257bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1258bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1259bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1260bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1261bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 12621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1263bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner const llvm::Type *NewRetTy = NewFn->getReturnType(); 1264bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::SmallVector<llvm::Value*, 4> ArgList; 1265bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1266bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1267dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer UI != E; ) { 1268bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 1269dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::Value::use_iterator I = UI++; // Increment before the CI is erased. 1270dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*I); 12718670cd3ea4dfbf86caacd270ec2441e9949bbb6aGabor Greif if (!CI) continue; // FIXME: when we allow Invoke, just do CallSite CS(*I) 127235db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif llvm::CallSite CS(CI); 1273dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer if (!CI || !CS.isCallee(I)) continue; 12741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1275bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1276bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1277bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1278bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1279bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1280bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1281bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1282bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1283bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1284bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1285bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1286bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 128735db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif if (CS.arg_size() == ArgNo || 128835db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif CS.getArgument(ArgNo)->getType() != AI->getType()) { 1289bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1290bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1291bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1292bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1293bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1294bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 12951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1296bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1297bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 12986ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif ArgList.append(CS.arg_begin(), CS.arg_begin() + ArgNo); 1299bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList.begin(), 1300bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.end(), "", CI); 1301bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1302ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1303bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 1304bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->setAttributes(CI->getAttributes()); 1305ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1306bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1307bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 130800549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 130900549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 13103b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1311c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner // Copy debug location attached to CI. 1312c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner if (!CI->getDebugLoc().isUnknown()) 1313c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner NewCall->setDebugLoc(CI->getDebugLoc()); 1314bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1315bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1316bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1317bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1318bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1319b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 1320b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 1321c0bf462cf35fe050bddbd8bff967298e4a67e79dJohn McCall const llvm::FunctionType *Ty = getTypes().GetFunctionType(GD); 13229fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1323b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 13241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13250558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 13260558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 13270558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 13280558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 13290558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 13301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13320558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1333bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 13341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 133542745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1336bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 13370558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 133834809507232bc4c3c4840c7d092c7440219fddafChris Lattner 133962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 134062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 134162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 134262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 134362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 134462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 1345f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // (e.g. "int f(int x)"). Move the old function aside so that it 1346f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // doesn't interfere with GetAddrOfFunction. 1347f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall OldFn->setName(llvm::StringRef()); 1348b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 13491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1350bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1351bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1352bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 13539fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1354bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 13559fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 13569fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 13571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 135862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1359bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 13601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 13613c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1362bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1363bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 13641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 136562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1366bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 13671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13680558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1369bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 13701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1371112c967bd5c862a0f5d7913aa06700c048807db8John McCall // We need to set linkage and visibility on the function before 1372112c967bd5c862a0f5d7913aa06700c048807db8John McCall // generating code for it because various parts of IR generation 1373112c967bd5c862a0f5d7913aa06700c048807db8John McCall // want to propagate this information down (e.g. to local static 1374112c967bd5c862a0f5d7913aa06700c048807db8John McCall // declarations). 13750558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 13768b2423361648c39a7d8a3c5e8129e12006deac32John McCall setFunctionLinkage(D, Fn); 1377bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1378112c967bd5c862a0f5d7913aa06700c048807db8John McCall // FIXME: this is redundant with part of SetFunctionDefinitionAttributes 1379112c967bd5c862a0f5d7913aa06700c048807db8John McCall setGlobalVisibility(Fn, D, /*ForDef*/ true); 1380112c967bd5c862a0f5d7913aa06700c048807db8John McCall 1381219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 13826379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 13837c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 13847c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 13851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 138640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1387219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 138840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1389219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 1390bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1391bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1392f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallvoid CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { 1393f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 139440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1395bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1396bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 13979a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson llvm::StringRef MangledName = getMangledName(GD); 1398f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1399f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // If there is a definition in the module, then it wins over the alias. 1400f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // This is dubious, but allow it to be safe. Just ignore the alias. 1401f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 1402f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (Entry && !Entry->isDeclaration()) 1403f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return; 14041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1405f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1406bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1407bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1408bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1409bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1410bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 1411f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl()); 1412bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1413f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 141496e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1415bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1416bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 14171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1418bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1419bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1420bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 14211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1422bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1423f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(Entry->isDeclaration()); 1424f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1425bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1426bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1427bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1428bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1429bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1430bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1431bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1432f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GA->takeName(Entry); 14331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14343c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1435bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1436bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1437f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall } else { 14389a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson GA->setName(MangledName); 1439bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 14401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14417c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 14427c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 14437c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 144440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 14457c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 14467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 144706a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (FD->hasBody()) 14487c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 14497c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 14507c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 14517c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 14521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 145311e8ce7380856abee188b237c2600272df2ed09dRafael Espindola D->hasAttr<WeakRefAttr>() || 145440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis D->hasAttr<WeakImportAttr>()) { 14557c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 14567c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 14577c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 14587c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1459bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1460bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1461b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// getBuiltinLibFunction - Given a builtin id for a function like 1462b808c952bbff821dce727dd801a1098d64394f98Chris Lattner/// "__builtin_fabsf", return a Function* for "fabsf". 146334771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbarllvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, 146434771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar unsigned BuiltinID) { 14653e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 14661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 14673e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 14681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14693e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 14703e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 14713e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 14723e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 14731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::FunctionType *Ty = 1475386ca78d0b03b1fb519e60d1a14cd12a220364a6Eli Friedman cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); 1476bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 147734771b594ca8cdf8cd2e40b27170efa4ed2833c5Daniel Dunbar return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD)); 1478bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 1479bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 14807acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 14817acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 14827acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 14837acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 14847acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1485bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 14861d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 14871d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 14881d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 148970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 14901d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 14911d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 14922f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer llvm::StringRef String = Literal->getString(); 14932f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer unsigned NumBytes = String.size(); 14941d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1495f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1496f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1497f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 14982f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer return Map.GetOrCreateValue(String); 1499f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1500f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 15011d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 15021d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::SmallVector<UTF16, 128> ToBuf(NumBytes); 15032f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer const UTF8 *FromPtr = (UTF8 *)String.data(); 15041d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 15051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1506e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian (void)ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 1507e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian &ToPtr, ToPtr + NumBytes, 1508e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian strictConversion); 15091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 151070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 15111d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 151270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 151370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 151470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 151570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 151670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 151770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 151870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 151970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 152070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 152170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 152270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 152370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 152470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 152570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 152670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 152770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 152870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1529434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1530434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1531434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 153270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 15331d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 153470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar return Map.GetOrCreateValue(llvm::StringRef(AsBytes.data(), AsBytes.size())); 15351d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 15361d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 15371d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 15381d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 15391d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 15401d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 15411d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 15421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 154370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 154470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 15451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15461d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 15471d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 15481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15490032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 15500032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 15513e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 15521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15539d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1554c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1555c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 155696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 15571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 15589d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 15593e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 15603e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 15613c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1562c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 15631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1564e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 15653e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 15661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const llvm::StructType *STy = 1567e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1568e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 15695add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 157044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1571c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 15725add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 15731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1574c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 15753e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 15761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 15775add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 15785add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1579c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 15800032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1581a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 158295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1583278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner bool isConstant; 1584a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1585278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 158695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1587278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // Note: -fwritable-strings doesn't make unicode CFStrings writable, but 1588278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // does make plain ascii ones writable. 1589278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = true; 1590a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 159195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::PrivateLinkage; 1592278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = !Features.WritableStrings; 1593a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1594278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 15951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 1596278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 1597278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner ".str"); 1598b266a1fce09ab4ee7033268199509aacfbef056aRafael Espindola GV->setUnnamedAddr(true); 1599a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 16004da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 16014da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck GV->setAlignment(Align.getQuantity()); 1602a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 16035add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 16045add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1605c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1606c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 16075add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 16081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1609c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 161008e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 16111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 16121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 161395b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 16148e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (const char *Sect = getContext().Target.getCFStringSection()) 16158e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 16161d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 16171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16180c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1619c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 162045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 162133e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanianllvm::Constant * 16224c73307c74764ba99e1379677fe92af72f676531Fariborz JahanianCodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) { 16232bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian unsigned StringLength = 0; 16242bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isUTF16 = false; 16252bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::StringMapEntry<llvm::Constant*> &Entry = 16262bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GetConstantCFStringEntry(CFConstantStringMap, Literal, 16272bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian getTargetData().isLittleEndian(), 16282bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isUTF16, StringLength); 16292bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16302bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (llvm::Constant *C = Entry.getValue()) 16312bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return C; 16322bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16332bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zero = 16342bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 16352bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zeros[] = { Zero, Zero }; 16362bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 1637ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian // If we don't already have it, get _NSConstantStringClassReference. 16384c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (!ConstantStringClassRef) { 16394c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string StringClass(getLangOptions().ObjCConstantStringClass); 16402bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 16412bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Ty = llvm::ArrayType::get(Ty, 0); 16424c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::Constant *GV; 16434c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (StringClass.empty()) 16444c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian GV = CreateRuntimeVariable(Ty, 16454c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Features.ObjCNonFragileABI ? 16464c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian "OBJC_CLASS_$_NSConstantString" : 16474c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian "_NSConstantStringClassReference"); 16484c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian else { 16494c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string str; 16504c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (Features.ObjCNonFragileABI) 16514c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian str = "OBJC_CLASS_$_" + StringClass; 16524c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian else 16534c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian str = "_" + StringClass + "ClassReference"; 16544c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian GV = CreateRuntimeVariable(Ty, str); 16554c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian } 16562bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Decay array -> ptr 16574c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian ConstantStringClassRef = 16584c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 16592bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 16602bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16612bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian QualType NSTy = getContext().getNSConstantStringType(); 16622bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16632bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::StructType *STy = 16642bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian cast<llvm::StructType>(getTypes().ConvertType(NSTy)); 16652bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16662bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian std::vector<llvm::Constant*> Fields(3); 16672bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16682bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Class pointer. 16694c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Fields[0] = ConstantStringClassRef; 16702bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16712bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String pointer. 16722bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 16732bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16742bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage; 16752bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isConstant; 16762bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (isUTF16) { 16772bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME: why do utf strings get "_" labels instead of "L" labels? 16782bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Linkage = llvm::GlobalValue::InternalLinkage; 16792bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Note: -fwritable-strings doesn't make unicode NSStrings writable, but 16802bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // does make plain ascii ones writable. 16812bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isConstant = true; 16822bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } else { 16832bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Linkage = llvm::GlobalValue::PrivateLinkage; 16842bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian isConstant = !Features.WritableStrings; 16852bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 16862bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16872bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable *GV = 16882bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 16892bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian ".str"); 1690803d307a5385059b1a84dfe9706ab158c80a20dcRafael Espindola GV->setUnnamedAddr(true); 16912bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (isUTF16) { 16922bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 16932bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setAlignment(Align.getQuantity()); 16942bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 16952bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 16962bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 16972bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String length. 16982bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 16992bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[2] = llvm::ConstantInt::get(Ty, StringLength); 17002bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17012bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // The struct. 17022bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian C = llvm::ConstantStruct::get(STy, Fields); 17032bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 17042bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable::PrivateLinkage, C, 17052bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian "_unnamed_nsstring_"); 17062bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME. Fix section. 1707ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian if (const char *Sect = 1708ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian Features.ObjCNonFragileABI 1709ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian ? getContext().Target.getNSStringNonFragileABISection() 1710ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian : getContext().Target.getNSStringSection()) 17112bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setSection(Sect); 17122bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Entry.setValue(GV); 17132bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 17142bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return GV; 171533e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian} 171633e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian 17176143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 17181e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 17196143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 17201e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 17211e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar getContext().getAsConstantArrayType(E->getType()); 17221e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 17231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1724dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 17251e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 17261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1727dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 1728dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner RealLen *= getContext().Target.getWCharWidth()/8; 17291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17302f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer std::string Str = E->getString().str(); 17311e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 17321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17331e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 17341e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 17351e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 17366143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 17376143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 17386143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 17396143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 17406143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 17417eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 17427eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S)); 17437eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman if (S->isWide()) { 17447eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Type *DestTy = 17457eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); 17467eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman C = llvm::ConstantExpr::getBitCast(C, DestTy); 17477eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 17487eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman return C; 17496143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 17506143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1751eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1752eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1753eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1754eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1755eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1756eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1757a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1758a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1759eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1760eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1761eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1762a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 17631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 176445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 17655fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 17665fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 17676143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 17680032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 17690032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 17701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 177145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 17721257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalVariable *GV = 17731257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 17741257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalValue::PrivateLinkage, 17751257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola C, GlobalName); 17761257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola GV->setUnnamedAddr(true); 17771257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola return GV; 177845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 177945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 17806143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 17816143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 17826143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 17836143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 17846143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 17856143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 17866143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 17876143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 17885fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, 17895fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 17908e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 17918e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 17928e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 17938e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 179495b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 17958e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 17968e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 17978e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 17985fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar return GenerateStringLiteral(str, false, *this, GlobalName); 17991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::StringMapEntry<llvm::Constant *> &Entry = 180195b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 180245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 180345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1804eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 180545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 180645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 18075fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); 180845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 180945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 181045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 18116143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 18126143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 18136143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 18146143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 18155fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, 18165fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 1817c9f29c61856ffb5f643cedbe87ac076f21a1381aChris Lattner return GetAddrOfConstantString(str + '\0', GlobalName); 18186143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 181941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1820af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1821af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 18221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 1823af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 18241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 182517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 1826af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 18271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1828af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1829af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1830af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1831af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1832af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1833af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1834af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1835af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1836af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 183717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 1838fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1839fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1840af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 184117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 1842fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1843fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1844af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1845af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1846af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1847af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1848109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// EmitObjCIvarInitializations - Emit information for ivar initialization 1849109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// for an implementation. 1850109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanianvoid CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { 1851109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian if (!Features.NeXTRuntime || D->getNumIvarInitializers() == 0) 1852109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian return; 1853109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian DeclContext* DC = const_cast<DeclContext*>(dyn_cast<DeclContext>(D)); 1854109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian assert(DC && "EmitObjCIvarInitializations - null DeclContext"); 1855109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); 1856109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 1857109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *DTORMethod = ObjCMethodDecl::Create(getContext(), 1858109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 1859109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 1860109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().VoidTy, 0, 18613fe104154dd2e8ffb351142d74f308938b5c99bfFariborz Jahanian DC, true, false, true, false, 1862109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 1863109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(DTORMethod); 1864109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); 1865109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1866109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian II = &getContext().Idents.get(".cxx_construct"); 1867109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian cxxSelector = getContext().Selectors.getSelector(0, &II); 1868109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian // The constructor returns 'self'. 1869109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), 1870109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 1871109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), cxxSelector, 1872109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().getObjCIdType(), 0, 18733fe104154dd2e8ffb351142d74f308938b5c99bfFariborz Jahanian DC, true, false, true, false, 1874109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 1875109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(CTORMethod); 1876109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); 1877109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1878109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 1879109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian} 1880109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 188191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 1882984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 188317945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 1884984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 1885984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 1886984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 1887984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 188891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 188991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 1890f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 1891f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 189291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 189391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 189491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 189591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 189617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 189791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 189891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 189991e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 190091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 190141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 190241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 190341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 190441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 190541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 190641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 190741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 190841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 190916e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 191016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 191116e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 19121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 191341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 1914293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 19152b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 191641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 191716e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 191816e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 191916e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 19201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1921555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 1922555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 1923555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 192441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 1925555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 192641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 192741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 192895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 192941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 1930984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 193141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 19329cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 19339d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 19349cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 1935dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 1936127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 1937127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 1938018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 19399cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 194095d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 19411fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 19421fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate()) 19431fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 19441fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 194595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 194695d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 194727ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 194827ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 194927ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 195036674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 195136674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 195236674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 195336674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 195436674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 195595d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 19561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 195738e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 195841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 195941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 1960b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 196141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1962000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 1963000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian case Decl::ObjCCategory: { 1964000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D); 1965000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (CD->IsClassExtension() && CD->hasSynthBitfield()) 1966000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(CD->getClassInterface()); 1967000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian break; 1968000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian } 1969000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 1970285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 197141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 1972b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 197341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 197441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 197541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 1976af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 1977af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 197841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 197941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 198041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1981af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 1982af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 1983000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (Features.ObjCNonFragileABI2 && OMD->hasSynthBitfield()) 1984000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(OMD->getClassInterface()); 1985af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 1986109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian EmitObjCIvarInitializations(OMD); 1987af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 198841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 19891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 199041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 199141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 199241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 19936fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 199441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 199541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 199641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 19971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 1998305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 199941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 200041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 200191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 200291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 200341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 200441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 200541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 200641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 20078d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer llvm::StringRef AsmString = AD->getAsmString()->getString(); 20081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 200941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 201041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 201141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 201241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 20138d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 201441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 201541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 20161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 2018f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 2019f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 2020f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 202141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 202241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 202341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 2024744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2025744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Turns the given pointer into a constant. 2026744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, 2027744016dde06fcffd50931e94a98c850f8b12cd87John McCall const void *Ptr) { 2028744016dde06fcffd50931e94a98c850f8b12cd87John McCall uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); 2029744016dde06fcffd50931e94a98c850f8b12cd87John McCall const llvm::Type *i64 = llvm::Type::getInt64Ty(Context); 2030744016dde06fcffd50931e94a98c850f8b12cd87John McCall return llvm::ConstantInt::get(i64, PtrInt); 2031744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2032744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2033744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic void EmitGlobalDeclMetadata(CodeGenModule &CGM, 2034744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *&GlobalMetadata, 2035744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl D, 2036744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr) { 2037744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (!GlobalMetadata) 2038744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata = 2039744016dde06fcffd50931e94a98c850f8b12cd87John McCall CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); 2040744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2041744016dde06fcffd50931e94a98c850f8b12cd87John McCall // TODO: should we report variant information for ctors/dtors? 2042744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Ops[] = { 2043744016dde06fcffd50931e94a98c850f8b12cd87John McCall Addr, 2044744016dde06fcffd50931e94a98c850f8b12cd87John McCall GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) 2045744016dde06fcffd50931e94a98c850f8b12cd87John McCall }; 2046744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops, 2)); 2047744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2048744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2049744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes associating all the global values in the 2050744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// current module with the Decls they came from. This is useful for 2051744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// projects using IR gen as a subroutine. 2052744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// 2053744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Since there's currently no way to associate an MDNode directly 2054744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with an llvm::GlobalValue, we create a global named metadata 2055744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with the name 'clang.global.decl.ptrs'. 2056744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenModule::EmitDeclMetadata() { 2057744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2058744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2059744016dde06fcffd50931e94a98c850f8b12cd87John McCall // StaticLocalDeclMap 2060744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<GlobalDecl,llvm::StringRef>::iterator 2061744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = MangledDeclNames.begin(), E = MangledDeclNames.end(); 2062744016dde06fcffd50931e94a98c850f8b12cd87John McCall I != E; ++I) { 2063744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); 2064744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); 2065744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2066744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2067744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2068744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes for all the local variables in the current 2069744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// function. 2070744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenFunction::EmitDeclMetadata() { 2071744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (LocalDeclMap.empty()) return; 2072744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2073744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::LLVMContext &Context = getLLVMContext(); 2074744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2075744016dde06fcffd50931e94a98c850f8b12cd87John McCall // Find the unique metadata ID for this name. 2076744016dde06fcffd50931e94a98c850f8b12cd87John McCall unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); 2077744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2078744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2079744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2080744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator 2081744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { 2082744016dde06fcffd50931e94a98c850f8b12cd87John McCall const Decl *D = I->first; 2083744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Addr = I->second; 2084744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2085744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { 2086744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); 2087744016dde06fcffd50931e94a98c850f8b12cd87John McCall Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, &DAddr, 1)); 2088744016dde06fcffd50931e94a98c850f8b12cd87John McCall } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { 2089744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); 2090744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); 2091744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2092744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2093744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2094673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2095673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@name Custom Runtime Function Interfaces 2096673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@{ 2097673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// 2098673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// FIXME: These can be eliminated once we can have clients just get the required 2099673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar// AST nodes from the builtin tables. 2100673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2101673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectDispose() { 2102673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectDispose) 2103673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose; 2104673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2105754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2106754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectDisposeDecl) { 2107754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectDispose = GetAddrOfFunction( 2108754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectDisposeDecl, 2109754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectDisposeDecl)); 2110754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2111754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2112754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2113673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::FunctionType *FTy; 2114673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar std::vector<const llvm::Type*> ArgTys; 2115673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); 2116673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(PtrToInt8Ty); 2117673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); 2118673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar FTy = llvm::FunctionType::get(ResultType, ArgTys, false); 2119673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectDispose = 2120673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CreateRuntimeFunction(FTy, "_Block_object_dispose"); 2121673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2122673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2123673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getBlockObjectAssign() { 2124673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (BlockObjectAssign) 2125673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign; 2126673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2127754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2128754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (BlockObjectAssignDecl) { 2129754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return BlockObjectAssign = GetAddrOfFunction( 2130754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar BlockObjectAssignDecl, 2131754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().GetFunctionType(BlockObjectAssignDecl)); 2132754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2133754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2134754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the function by hand. 2135673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::FunctionType *FTy; 2136673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar std::vector<const llvm::Type*> ArgTys; 2137673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar const llvm::Type *ResultType = llvm::Type::getVoidTy(VMContext); 2138673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(PtrToInt8Ty); 2139673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(PtrToInt8Ty); 2140673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar ArgTys.push_back(llvm::Type::getInt32Ty(VMContext)); 2141673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar FTy = llvm::FunctionType::get(ResultType, ArgTys, false); 2142673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return BlockObjectAssign = 2143673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar CreateRuntimeFunction(FTy, "_Block_object_assign"); 2144673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2145673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2146673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteGlobalBlock() { 2147673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteGlobalBlock) 2148673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteGlobalBlock; 2149754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2150754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2151754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteGlobalBlockDecl) { 2152754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteGlobalBlock = GetAddrOfGlobalVar( 2153754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteGlobalBlockDecl, 2154754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteGlobalBlockDecl->getType())); 2155754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2156754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2157754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2158673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteGlobalBlock = CreateRuntimeVariable( 2159673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar PtrToInt8Ty, "_NSConcreteGlobalBlock"); 2160673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2161673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2162673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbarllvm::Constant *CodeGenModule::getNSConcreteStackBlock() { 2163673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar if (NSConcreteStackBlock) 2164673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteStackBlock; 2165754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2166754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // If we saw an explicit decl, use that. 2167754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar if (NSConcreteStackBlockDecl) { 2168754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar return NSConcreteStackBlock = GetAddrOfGlobalVar( 2169754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar NSConcreteStackBlockDecl, 2170754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar getTypes().ConvertType(NSConcreteStackBlockDecl->getType())); 2171754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar } 2172754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar 2173754b9fbaa13749c61393cc613eec7c79efe60ddfDaniel Dunbar // Otherwise construct the variable by hand. 2174673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar return NSConcreteStackBlock = CreateRuntimeVariable( 2175673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar PtrToInt8Ty, "_NSConcreteStackBlock"); 2176673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar} 2177673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 2178673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar///@} 2179