CodeGenModule.cpp revision 73fb35003aad027492e661a3749e921b5d1ecaf9
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" 196c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne#include "CGCUDARuntime.h" 204c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall#include "CGCXXABI.h" 21af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar#include "CGObjCRuntime.h" 228c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne#include "CGOpenCLRuntime.h" 2382d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov#include "TargetInfo.h" 2406057cef0bcd7804e80f3ce2bbe352178396c715Chandler Carruth#include "clang/Frontend/CodeGenOptions.h" 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 26687cc4a850b59116efee061018f0d8df50728b82Ken Dyck#include "clang/AST/CharUnits.h" 27c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2821ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 29af896897f7485176f43d40c4adced7efb0fb2b06Douglas Gregor#include "clang/AST/DeclTemplate.h" 3014110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne#include "clang/AST/Mangle.h" 311a5e0d7f18485e4fb958f96dcddff3e4486a4069Anders Carlsson#include "clang/AST/RecordLayout.h" 322c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner#include "clang/Basic/Diagnostic.h" 338bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman#include "clang/Basic/SourceManager.h" 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 35e9b7d8ace8674585818990cff585daae7745bd88Steve Naroff#include "clang/Basic/ConvertUTF.h" 36ec9426ca6039279bcc99bc2c625bb2abe4f0353dNate Begeman#include "llvm/CallingConv.h" 37bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner#include "llvm/Module.h" 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/Intrinsics.h" 39d5b8902c0329d80a216803b58dc3b689349a0c11Chris Lattner#include "llvm/LLVMContext.h" 406374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall#include "llvm/ADT/Triple.h" 41c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola#include "llvm/Target/Mangler.h" 4220ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 436ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif#include "llvm/Support/CallSite.h" 4478f7ece00e2ddfb64d4ed72a7be770b5b9b805e3Chris Lattner#include "llvm/Support/ErrorHandling.h" 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougestatic const char AnnotationSection[] = "llvm.metadata"; 4977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 50f16aa103d3afd42fbca2ab346f191bf745cec092John McCallstatic CGCXXABI &createCXXABI(CodeGenModule &CGM) { 51bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor switch (CGM.getContext().getTargetInfo().getCXXABI()) { 52f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_ARM: return *CreateARMCXXABI(CGM); 53f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_Itanium: return *CreateItaniumCXXABI(CGM); 54f16aa103d3afd42fbca2ab346f191bf745cec092John McCall case CXXABI_Microsoft: return *CreateMicrosoftCXXABI(CGM); 55f16aa103d3afd42fbca2ab346f191bf745cec092John McCall } 56f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 57f16aa103d3afd42fbca2ab346f191bf745cec092John McCall llvm_unreachable("invalid C++ ABI kind"); 58f16aa103d3afd42fbca2ab346f191bf745cec092John McCall return *CreateItaniumCXXABI(CGM); 59f16aa103d3afd42fbca2ab346f191bf745cec092John McCall} 60f16aa103d3afd42fbca2ab346f191bf745cec092John McCall 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 622811ccf48d6d898c42cc4cfad37abedb36236d20Chandler CarruthCodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO, 63468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall llvm::Module &M, const llvm::TargetData &TD, 64d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie DiagnosticsEngine &diags) 65d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall : Context(C), Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M), 66468ec6c0266e48fccb26ce50d5b915c645bb3c7bJohn McCall TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags), 67f16aa103d3afd42fbca2ab346f191bf745cec092John McCall ABI(createCXXABI(*this)), 6808d4792bb5d9e0e7f122c6273636807029c06aaaDaniel Dunbar Types(C, M, TD, getTargetCodeGenInfo().getABIInfo(), ABI, CGO), 693d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman TBAA(0), 706c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne VTables(*this), ObjCRuntime(0), OpenCLRuntime(0), CUDARuntime(0), 716c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne DebugInfo(0), ARCData(0), RRData(0), CFConstantStringClassRef(0), 726c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne ConstantStringClassRef(0), NSConstantStringType(0), 73673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar VMContext(M.getContext()), 74673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar NSConcreteGlobalBlock(0), NSConcreteStackBlock(0), 75d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall BlockObjectAssign(0), BlockObjectDispose(0), 76d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall BlockDescriptorType(0), GenericBlockLiteralType(0) { 7760be607e5d71627bf3dab8f51c3fdca74267c692David Chisnall if (Features.ObjC1) 788c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne createObjCRuntime(); 798c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne if (Features.OpenCL) 808c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne createOpenCLRuntime(); 816c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne if (Features.CUDA) 826c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne createCUDARuntime(); 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 89e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky // If debug info or coverage generation is enabled, create the CGDebugInfo 90e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky // object. 91e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky if (CodeGenOpts.DebugInfo || CodeGenOpts.EmitGcovArcs || 92e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky CodeGenOpts.EmitGcovNotes) 93e8ba8d78a258ec992d3521eebdae8324db777b14Nick Lewycky DebugInfo = new CGDebugInfo(*this); 94d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall 95d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall Block.GlobalUniqueCount = 0; 965936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall 97f85e193739c953358c865005855253af4f68a497John McCall if (C.getLangOptions().ObjCAutoRefCount) 98f85e193739c953358c865005855253af4f68a497John McCall ARCData = new ARCEntrypoints(); 99f85e193739c953358c865005855253af4f68a497John McCall RRData = new RREntrypoints(); 100f85e193739c953358c865005855253af4f68a497John McCall 1015936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall // Initialize the type cache. 1025936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall llvm::LLVMContext &LLVMContext = M.getContext(); 1030774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall VoidTy = llvm::Type::getVoidTy(LLVMContext); 1040774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int8Ty = llvm::Type::getInt8Ty(LLVMContext); 1050774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int32Ty = llvm::Type::getInt32Ty(LLVMContext); 1060774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall Int64Ty = llvm::Type::getInt64Ty(LLVMContext); 107bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor PointerWidthInBits = C.getTargetInfo().getPointerWidth(0); 10834695856c0e67b3765b46304cc71b5d2cd5b71c7John McCall PointerAlignInBytes = 109bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor C.toCharUnitsFromBits(C.getTargetInfo().getPointerAlign(0)).getQuantity(); 110bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor IntTy = llvm::IntegerType::get(LLVMContext, C.getTargetInfo().getIntWidth()); 1115936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall IntPtrTy = llvm::IntegerType::get(LLVMContext, PointerWidthInBits); 1125936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8PtrTy = Int8Ty->getPointerTo(0); 1135936e33bf74dd6bf126ceee0f6169a2593d03a69John McCall Int8PtrPtrTy = Int8PtrTy->getPointerTo(0); 1142b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 1152b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 1162b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 117e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne delete ObjCRuntime; 1188c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne delete OpenCLRuntime; 1196c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne delete CUDARuntime; 1200628b724ff68105dc88af00a39f859447f22981eTed Kremenek delete TheTargetCodeGenInfo; 121f16aa103d3afd42fbca2ab346f191bf745cec092John McCall delete &ABI; 1224376c85fb0ac9e7fd779d246efc77e1169179138Dan Gohman delete TBAA; 123815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 124f85e193739c953358c865005855253af4f68a497John McCall delete ARCData; 125f85e193739c953358c865005855253af4f68a497John McCall delete RRData; 126815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 127815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 1280d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnallvoid CodeGenModule::createObjCRuntime() { 1290d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall if (!Features.NeXTRuntime) 130e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime = CreateGNUObjCRuntime(*this); 1310d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall else 132e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime = CreateMacObjCRuntime(*this); 1330d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall} 1340d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall 1358c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbournevoid CodeGenModule::createOpenCLRuntime() { 1368c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne OpenCLRuntime = new CGOpenCLRuntime(*this); 1378c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne} 1388c25fc584ce27d59df9923f153e8a132dde58d04Peter Collingbourne 1396c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbournevoid CodeGenModule::createCUDARuntime() { 1406c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne CUDARuntime = CreateNVCUDARuntime(*this); 1416c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne} 1426c0aa5ff6e6253db0f993053599e2a52b5b93b2dPeter Collingbourne 143815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 14482227ff4eb665bbf41720ebdc0dc9215a86ba838Chris Lattner EmitDeferred(); 1456c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman EmitCXXGlobalInitFunc(); 146efb0fa9e11f75af51744a6159530ef7cc8efa24aDaniel Dunbar EmitCXXGlobalDtorFunc(); 147e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne if (ObjCRuntime) 148e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne if (llvm::Function *ObjCInitFunction = ObjCRuntime->ModuleInitFunction()) 149208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 1506bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 1516bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 15277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge EmitGlobalAnnotations(); 1530269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 154744016dde06fcffd50931e94a98c850f8b12cd87John McCall 155b25938303de0976b9f189363d43033e5788e3d36John McCall SimplifyPersonality(); 156b25938303de0976b9f189363d43033e5788e3d36John McCall 157744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (getCodeGenOpts().EmitDeclMetadata) 158744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitDeclMetadata(); 1595ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky 1605ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky if (getCodeGenOpts().EmitGcovArcs || getCodeGenOpts().EmitGcovNotes) 1613dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky EmitCoverageFile(); 162f391dbe39dca85f2a2c6ea558811dacc571c223eDevang Patel 163f391dbe39dca85f2a2c6ea558811dacc571c223eDevang Patel if (DebugInfo) 164f391dbe39dca85f2a2c6ea558811dacc571c223eDevang Patel DebugInfo->finalize(); 165f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 166f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 167e80d56771736c85fd8365c394a6731923b17e91dDevang Patelvoid CodeGenModule::UpdateCompletedType(const TagDecl *TD) { 168e80d56771736c85fd8365c394a6731923b17e91dDevang Patel // Make sure that this type is translated. 169e80d56771736c85fd8365c394a6731923b17e91dDevang Patel Types.UpdateCompletedType(TD); 170e80d56771736c85fd8365c394a6731923b17e91dDevang Patel if (DebugInfo) 171e80d56771736c85fd8365c394a6731923b17e91dDevang Patel DebugInfo->UpdateCompletedType(TD); 172e80d56771736c85fd8365c394a6731923b17e91dDevang Patel} 173e80d56771736c85fd8365c394a6731923b17e91dDevang Patel 1743d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanllvm::MDNode *CodeGenModule::getTBAAInfo(QualType QTy) { 1753d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman if (!TBAA) 1763d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return 0; 1773d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman return TBAA->getTBAAInfo(QTy); 1783d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1793d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1803d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohmanvoid CodeGenModule::DecorateInstruction(llvm::Instruction *Inst, 1813d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman llvm::MDNode *TBAAInfo) { 1823d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman Inst->setMetadata(llvm::LLVMContext::MD_tbaa, TBAAInfo); 1833d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman} 1843d5aff5d3036b0ff09d114857cd2276134b3d8c9Dan Gohman 1856374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCallbool CodeGenModule::isTargetDarwin() const { 186bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor return getContext().getTargetInfo().getTriple().isOSDarwin(); 1876374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall} 1886374c3307e2d73348f7b8cc73eeeb0998ad0ac94John McCall 1895f9e272e632e951b1efe824cd16acb4d96077930Chris Lattnervoid CodeGenModule::Error(SourceLocation loc, StringRef error) { 190d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie unsigned diagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, error); 19132096695c76033a6b0b1747c439f7378a11e8312John McCall getDiags().Report(Context.getFullLoc(loc), diagID); 19232096695c76033a6b0b1747c439f7378a11e8312John McCall} 19332096695c76033a6b0b1747c439f7378a11e8312John McCall 194488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 1952c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 19690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 19790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 19890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 19990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 200d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, 20156b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 2022c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 2030a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 2040a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 2052c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 20658c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 207488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 208c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 20990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 21090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 21190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 21290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 213d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, 21456b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 215c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 2160a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 217c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 218c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 219bc8d40d85f3fa1e34569834916f18fecaa635152John McCallllvm::ConstantInt *CodeGenModule::getSize(CharUnits size) { 220bc8d40d85f3fa1e34569834916f18fecaa635152John McCall return llvm::ConstantInt::get(SizeTy, size.getQuantity()); 221bc8d40d85f3fa1e34569834916f18fecaa635152John McCall} 222bc8d40d85f3fa1e34569834916f18fecaa635152John McCall 2231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, 2240ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson const NamedDecl *D) const { 22504d4078425614bf9fd58d606335c1f5f74ee7fa4Daniel Dunbar // Internal definitions always have default visibility. 226df102fcb978588d5edbc661fb5da0b6922f9ab1cChris Lattner if (GV->hasLocalLinkage()) { 2277e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 2286ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar return; 2297e714cd931fa3a90bfd728318a92485aa3e95748Daniel Dunbar } 2306ab187a49a42de6d351248d8a6e0206e39743a0cDaniel Dunbar 231af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility for definitions. 232af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 233c7c9058f4977ef4584d68718e23f34504b150ef4Fariborz Jahanian if (LV.visibilityExplicit() || !GV->hasAvailableExternallyLinkage()) 234c7c9058f4977ef4584d68718e23f34504b150ef4Fariborz Jahanian GV->setVisibility(GetLLVMVisibility(LV.visibility())); 2357cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian} 2367cd2e93125e2f3b6ca01b24ed0c3fd7e94683fd9Fariborz Jahanian 237cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// Set the symbol visibility of type information (vtable and RTTI) 238cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall/// associated with the given type. 239cbfe50224b19119e759802bd0c1463269dffd09eJohn McCallvoid CodeGenModule::setTypeVisibility(llvm::GlobalValue *GV, 240cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall const CXXRecordDecl *RD, 241fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson TypeVisibilityKind TVK) const { 2420ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(GV, RD); 243cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 244279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakVTables) 245279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall return; 246279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall 2479a86a137b0872bad25161fb3408a71d919638757Anders Carlsson // We never want to drop the visibility for RTTI names. 2489a86a137b0872bad25161fb3408a71d919638757Anders Carlsson if (TVK == TVK_ForRTTIName) 2499a86a137b0872bad25161fb3408a71d919638757Anders Carlsson return; 2509a86a137b0872bad25161fb3408a71d919638757Anders Carlsson 251cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We want to drop the visibility to hidden for weak type symbols. 252cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // This isn't possible if there might be unresolved references 253cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // elsewhere that rely on this symbol being visible. 254cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2557a536907da776bdc47a704e7cafd641e8150e653John McCall // This should be kept roughly in sync with setThunkVisibility 2567a536907da776bdc47a704e7cafd641e8150e653John McCall // in CGVTables.cpp. 2577a536907da776bdc47a704e7cafd641e8150e653John McCall 258cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Preconditions. 259f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson if (GV->getLinkage() != llvm::GlobalVariable::LinkOnceODRLinkage || 260cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->getVisibility() != llvm::GlobalVariable::DefaultVisibility) 261cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 262cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 263cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Don't override an explicit visibility attribute. 2644421d2b341d041df44013769f23c306308bbab83Douglas Gregor if (RD->getExplicitVisibility()) 265cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 266cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 267cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall switch (RD->getTemplateSpecializationKind()) { 268cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // We have to disable the optimization if this is an EI definition 269cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // because there might be EI declarations in other shared objects. 270cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDefinition: 271cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ExplicitInstantiationDeclaration: 272cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 273cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2747a536907da776bdc47a704e7cafd641e8150e653John McCall // Every use of a non-template class's type information has to emit it. 275cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_Undeclared: 276cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 277cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 2787a536907da776bdc47a704e7cafd641e8150e653John McCall // In theory, implicit instantiations can ignore the possibility of 2797a536907da776bdc47a704e7cafd641e8150e653John McCall // an explicit instantiation declaration because there necessarily 2807a536907da776bdc47a704e7cafd641e8150e653John McCall // must be an EI definition somewhere with default visibility. In 2817a536907da776bdc47a704e7cafd641e8150e653John McCall // practice, it's possible to have an explicit instantiation for 2827a536907da776bdc47a704e7cafd641e8150e653John McCall // an arbitrary template class, and linkers aren't necessarily able 2837a536907da776bdc47a704e7cafd641e8150e653John McCall // to deal with mixed-visibility symbols. 2847a536907da776bdc47a704e7cafd641e8150e653John McCall case TSK_ExplicitSpecialization: 285cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall case TSK_ImplicitInstantiation: 286279b5eb6910d64a293e9c0e2887a05c65d8737d7John McCall if (!CodeGenOpts.HiddenWeakTemplateVTables) 2877a536907da776bdc47a704e7cafd641e8150e653John McCall return; 288cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall break; 289cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall } 290cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 291cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // If there's a key function, there may be translation units 292cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // that don't have the key function's definition. But ignore 293cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // this if we're emitting RTTI under -fno-rtti. 294fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson if (!(TVK != TVK_ForRTTI) || Features.RTTI) { 295cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall if (Context.getKeyFunction(RD)) 296cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall return; 297fa2e99f72f9bfe2270ea8caf76d0eef11c45259fAnders Carlsson } 298cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 299cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall // Otherwise, drop the visibility to hidden. 300cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 301b1c65ff108de47a89585ad37874bd6cb232664cdRafael Espindola GV->setUnnamedAddr(true); 302cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall} 303cbfe50224b19119e759802bd0c1463269dffd09eJohn McCall 3045f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerStringRef CodeGenModule::getMangledName(GlobalDecl GD) { 305793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson const NamedDecl *ND = cast<NamedDecl>(GD.getDecl()); 306793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 3075f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef &Str = MangledDeclNames[GD.getCanonicalDecl()]; 308793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (!Str.empty()) 309793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 310793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 3114c40d98ab7acf5f27fa89b17bd8fc0ef7683df37John McCall if (!getCXXABI().getMangleContext().shouldMangleDeclName(ND)) { 312793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson IdentifierInfo *II = ND->getIdentifier(); 313793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson assert(II && "Attempt to mangle unnamed decl."); 314793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 315793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson Str = II->getName(); 316793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 317793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson } 318793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 319793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson llvm::SmallString<256> Buffer; 320c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola llvm::raw_svector_ostream Out(Buffer); 321793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson if (const CXXConstructorDecl *D = dyn_cast<CXXConstructorDecl>(ND)) 322c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleCXXCtor(D, GD.getCtorType(), Out); 323793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const CXXDestructorDecl *D = dyn_cast<CXXDestructorDecl>(ND)) 324c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleCXXDtor(D, GD.getDtorType(), Out); 325793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else if (const BlockDecl *BD = dyn_cast<BlockDecl>(ND)) 326c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleBlock(BD, Out); 327793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson else 328c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola getCXXABI().getMangleContext().mangleName(ND, Out); 329793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 330793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson // Allocate space for the mangled name. 331c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola Out.flush(); 332793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson size_t Length = Buffer.size(); 333793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson char *Name = MangledNamesAllocator.Allocate<char>(Length); 334793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson std::copy(Buffer.begin(), Buffer.end(), Name); 335793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 3365f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Str = StringRef(Name, Length); 337793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 338793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson return Str; 339793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson} 340793a990774826a0c20b0da66cec0991badfb8b63Anders Carlsson 34114110477887e3dc168ffc6c191e72d705051f99ePeter Collingbournevoid CodeGenModule::getBlockMangledName(GlobalDecl GD, MangleBuffer &Buffer, 34214110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const BlockDecl *BD) { 34314110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne MangleContext &MangleCtx = getCXXABI().getMangleContext(); 34414110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne const Decl *D = GD.getDecl(); 345c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola llvm::raw_svector_ostream Out(Buffer.getBuffer()); 34614110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne if (D == 0) 347c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleGlobalBlock(BD, Out); 34814110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) 349c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleCtorBlock(CD, GD.getCtorType(), BD, Out); 35014110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(D)) 351c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleDtorBlock(DD, GD.getDtorType(), BD, Out); 35214110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne else 353c4850c2aa4c281a352e228aafc51fb1e30dcad02Rafael Espindola MangleCtx.mangleBlock(cast<DeclContext>(D), BD, Out); 3549a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson} 3559a8822bb154b792cdb18fe4cfb34480ca0ec7661Anders Carlsson 3565f9e272e632e951b1efe824cd16acb4d96077930Chris Lattnerllvm::GlobalValue *CodeGenModule::GetGlobalValue(StringRef Name) { 357f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return getModule().getNamedValue(Name); 3585f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 3595f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 3606d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 3616d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 3626bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 36349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3646bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 3656d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 3666d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 3676bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 3686bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 3696bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 37049988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 3716bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 3726bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 3736bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3746bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 3756bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 3760774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall llvm::FunctionType* CtorFTy = llvm::FunctionType::get(VoidTy, false); 37796e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 3786bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3796bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 380c5cbb909e8a27deb8f1a2b6b7bf56a96051af81aChris Lattner llvm::StructType *CtorStructTy = 3817650d95a1a616ea300f37126a8dfc93dc19a662aChris Lattner llvm::StructType::get(llvm::Type::getInt32Ty(VMContext), 38296e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(CtorFTy), NULL); 3836bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3846bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 3856bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 3866bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 3876bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 3881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump S.push_back(llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 3890032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson I->second, false)); 3903c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 39108e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 3926bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 3936bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 3946bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 39596e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 3961c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson new llvm::GlobalVariable(TheModule, AT, false, 397572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 3987db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(AT, Ctors), 3991c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson GlobalName); 4006d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 4016d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 4026d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 403d46f98573ba104eda102dd3224b2dca69f1c6336John McCallllvm::GlobalValue::LinkageTypes 404d46f98573ba104eda102dd3224b2dca69f1c6336John McCallCodeGenModule::getFunctionLinkage(const FunctionDecl *D) { 40590e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); 4067c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 407f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_Internal) 408d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::InternalLinkage; 409f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 410f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<DLLExportAttr>()) 411d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::DLLExportLinkage; 412f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 413f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (D->hasAttr<WeakAttr>()) 414d46f98573ba104eda102dd3224b2dca69f1c6336John McCall return llvm::Function::WeakAnyLinkage; 415f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 416f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C99 mode, 'inline' functions are guaranteed to have a strong 417f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition somewhere else, so we can use available_externally linkage. 418f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_C99Inline) 419fd0f89d3d7e4220327abdec1cb115474d70219dcFariborz Jahanian return llvm::Function::AvailableExternallyLinkage; 4205584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall 4215584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall // Note that Apple's kernel linker doesn't support symbol 4225584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall // coalescing, so we need to avoid linkonce and weak linkages there. 4235584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall // Normally, this means we just map to internal, but for explicit 4245584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall // instantiations we'll map to external. 4255584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall 426f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // In C++, the compiler has to emit a definition in every translation unit 427f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // that references the function. We should use linkonce_odr because 428f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // a) if all references in this translation unit are optimized away, we 429f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // don't need to codegen it. b) if the function persists, it needs to be 430f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // merged with other definitions. c) C++ has the ODR, so we know the 431f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // definition is dependable. 432f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 433142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext 434142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian ? llvm::Function::LinkOnceODRLinkage 435142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian : llvm::Function::InternalLinkage; 436f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 437f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // An explicit instantiation of a template has weak linkage, since 438f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // explicit instantiations can occur in multiple translation units 439f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // and must all be equivalent. However, we are not allowed to 440f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // throw away these explicit instantiations. 441f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner if (Linkage == GVA_ExplicitTemplateInstantiation) 442142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext 443142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian ? llvm::Function::WeakODRLinkage 4445584d91c938384b57563edbca5c2d4f1c66ff02aJohn McCall : llvm::Function::ExternalLinkage; 445f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner 446f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner // Otherwise, we have strong external linkage. 447f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner assert(Linkage == GVA_StrongExternal); 448f815306571385e2892e079a409f1b5b11f5e5cbbChris Lattner return llvm::Function::ExternalLinkage; 449d46f98573ba104eda102dd3224b2dca69f1c6336John McCall} 450d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 451d46f98573ba104eda102dd3224b2dca69f1c6336John McCall 452d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// SetFunctionDefinitionAttributes - Set attributes for a global. 453d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// 454d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// FIXME: This is currently only done for aliases and functions, but not for 455d46f98573ba104eda102dd3224b2dca69f1c6336John McCall/// variables (these details are set in EmitGlobalVarDefinition for variables). 456d46f98573ba104eda102dd3224b2dca69f1c6336John McCallvoid CodeGenModule::SetFunctionDefinitionAttributes(const FunctionDecl *D, 457d46f98573ba104eda102dd3224b2dca69f1c6336John McCall llvm::GlobalValue *GV) { 4587c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GV); 459d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 460d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 4617dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributes(const Decl *D, 4621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const CGFunctionInfo &Info, 4637dbd8197040313d796282d4af06eccdf8a17319cDaniel Dunbar llvm::Function *F) { 464ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar unsigned CallingConv; 465761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 466ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar ConstructAttributeList(Info, D, AttributeList, CallingConv); 467761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 468ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar AttributeList.size())); 469ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); 470f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 471f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 472d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall/// Determines whether the language options require us to model 473d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall/// unwind exceptions. We treat -fexceptions as mandating this 474d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall/// except under the fragile ObjC ABI with only ObjC exceptions 475d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall/// enabled. This means, for example, that C with -fexceptions 476d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall/// enables this. 477d1e40d5389a4382cbebc97d54792f41ee0414af4John McCallstatic bool hasUnwindExceptions(const LangOptions &Features) { 478d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall // If exceptions are completely disabled, obviously this is false. 479d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall if (!Features.Exceptions) return false; 480d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall 481d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall // If C++ exceptions are enabled, this is true. 482d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall if (Features.CXXExceptions) return true; 483d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall 484d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall // If ObjC exceptions are enabled, this depends on the ABI. 485d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall if (Features.ObjCExceptions) { 486d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall if (!Features.ObjCNonFragileABI) return false; 487d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall } 488d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall 489d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall return true; 490d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall} 491d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall 4927c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbarvoid CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, 4937c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::Function *F) { 494abca5a1b3e74e644e297c7590b46ab73a6bb476aRafael Espindola if (CodeGenOpts.UnwindTables) 495abca5a1b3e74e644e297c7590b46ab73a6bb476aRafael Espindola F->setHasUWTable(); 496abca5a1b3e74e644e297c7590b46ab73a6bb476aRafael Espindola 497d1e40d5389a4382cbebc97d54792f41ee0414af4John McCall if (!hasUnwindExceptions(Features)) 4981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->addFnAttr(llvm::Attribute::NoUnwind); 499af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 5002873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman if (D->hasAttr<NakedAttr>()) { 5012873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman // Naked implies noinline: we should not be inlining such functions. 502dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar F->addFnAttr(llvm::Attribute::Naked); 5032873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman F->addFnAttr(llvm::Attribute::NoInline); 5042873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman } 505dd0cb22bd62e1e835327f478a2dbf0b8fa439713Daniel Dunbar 5061feade8e520be483293dbf55eb57a51720899589Mike Stump if (D->hasAttr<NoInlineAttr>()) 50781ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 508f55314dce992fd60816ba337ad151a2fb7c42239Mike Stump 5092873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman // (noinline wins over always_inline, and we can't specify both in IR) 5102873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman if (D->hasAttr<AlwaysInlineAttr>() && 5112873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman !F->hasFnAttr(llvm::Attribute::NoInline)) 5122873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman F->addFnAttr(llvm::Attribute::AlwaysInline); 5132873aee1774a2ae731d6cc5c5ee05ba82780dc98Eli Friedman 514c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) 515c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola F->setUnnamedAddr(true); 516c5f657fe308f22243f674fc1dfbe24915944d8bfRafael Espindola 517e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor if (Features.getStackProtector() == LangOptions::SSPOn) 518fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtect); 519e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor else if (Features.getStackProtector() == LangOptions::SSPReq) 520fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson F->addFnAttr(llvm::Attribute::StackProtectReq); 521fd015353a3c4f528216276f25df5b4d464d7a0cdAnders Carlsson 522cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); 523cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt if (alignment) 524cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt F->setAlignment(alignment); 525cf807c4dfdb23e8fa3f400e0b24ef5b79db7a530Sean Hunt 526fb51ddfafcd5f8536d0312b3daa3c0b74b90ab5bMike Stump // C++ ABI requires 2-byte alignment for member functions. 527bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) 528bd6dbd19781cefd5b5ff9750c8bf86e6c341a68cMike Stump F->setAlignment(2); 529f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 530f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 5311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::SetCommonAttributes(const Decl *D, 5327c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar llvm::GlobalValue *GV) { 533934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) 534934176f27552141b5ad113cb3603ffb14906c570Anders Carlsson setGlobalVisibility(GV, ND); 5351fb0caaa7bef765b85972274e3b434af2572c141John McCall else 5361fb0caaa7bef765b85972274e3b434af2572c141John McCall GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 5377c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 53840b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<UsedAttr>()) 5397c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar AddUsedGlobal(GV); 5407c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 54140b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 5427c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GV->setSection(SA->getName()); 54382d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov 54482d0a418c8699fc6f4a9417457ffe93d43bba1c1Anton Korobeynikov getTargetCodeGenInfo().SetTargetAttributes(D, GV, *this); 5457c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar} 5467c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5470e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbarvoid CodeGenModule::SetInternalFunctionAttributes(const Decl *D, 5480e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar llvm::Function *F, 5490e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI) { 5500e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributes(D, FI, F); 5510e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, F); 5527c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5537c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::InternalLinkage); 5547c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 5550e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar SetCommonAttributes(D, F); 556f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 557f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 558b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlssonvoid CodeGenModule::SetFunctionAttributes(GlobalDecl GD, 559c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman llvm::Function *F, 560c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman bool IsIncompleteFunction) { 5610ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne if (unsigned IID = F->getIntrinsicID()) { 5620ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne // If this is an intrinsic function, set the function's attributes 5630ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne // to the intrinsic's attributes. 5640ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne F->setAttributes(llvm::Intrinsic::getAttributes((llvm::Intrinsic::ID)IID)); 5650ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne return; 5660ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne } 5670ac2cf4d28e1ed92508b27a3d9e28fc8db2a390bPeter Collingbourne 568b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); 569b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson 570c6c14d1cd68afcd90d097715296377f15be45210Eli Friedman if (!IsIncompleteFunction) 571b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetLLVMFunctionAttributes(FD, getTypes().getFunctionInfo(GD), F); 5721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5737c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Only a few attributes are set on declarations; these may later be 5747c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // overridden by a definition. 5751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 57640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<DLLImportAttr>()) { 5777c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::DLLImportLinkage); 5781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (FD->hasAttr<WeakAttr>() || 5790a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor FD->isWeakImported()) { 5807c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 5811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // separate linkage types for this. 5827c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setLinkage(llvm::Function::ExternalWeakLinkage); 5837c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 5841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump F->setLinkage(llvm::Function::ExternalLinkage); 585af14603ca61757cf4361b583b45639a04c57e651John McCall 586af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = FD->getLinkageAndVisibility(); 587af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() == ExternalLinkage && LV.visibilityExplicit()) { 588af14603ca61757cf4361b583b45639a04c57e651John McCall F->setVisibility(GetLLVMVisibility(LV.visibility())); 589af14603ca61757cf4361b583b45639a04c57e651John McCall } 5907c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 5917c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 59240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const SectionAttr *SA = FD->getAttr<SectionAttr>()) 5937c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar F->setSection(SA->getName()); 594219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 595219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 5960269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 5971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(!GV->isDeclaration() && 5980269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 59935f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner LLVMUsed.push_back(GV); 6000269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 6010269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 6020269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 6030269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 604ad64e024bd18cf25dcfa44e049004371838decd8Chris Lattner if (LLVMUsed.empty()) 6050269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 6060269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 6072acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(VMContext); 6081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 60935f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner // Convert LLVMUsed to what ConstantArray needs. 61035f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner std::vector<llvm::Constant*> UsedArray; 61135f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner UsedArray.resize(LLVMUsed.size()); 61235f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner for (unsigned i = 0, e = LLVMUsed.size(); i != e; ++i) { 6131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump UsedArray[i] = 6141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(&*LLVMUsed[i]), 615a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson i8PTy); 61635f38a2c22d68c22e2dbe8e9ee84c120c8f327bbChris Lattner } 6171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 618c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian if (UsedArray.empty()) 619c38e9affd4519ea199af22419c8c794973cc4b23Fariborz Jahanian return; 62096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, UsedArray.size()); 6211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 6231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), ATy, false, 6240269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 6257db6d838aad4083fe86d7bf703a75fe6e8a17856Owen Anderson llvm::ConstantArray::get(ATy, UsedArray), 6261c431b323d776362490bbf7cc796b74fedaf19f2Owen Anderson "llvm.used"); 6270269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 6280269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 6290269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 6300269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 6310269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 63267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Emit code for any potentially referenced deferred decls. Since a 63367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // previously unused static decl may become used during the generation of code 634dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky // for a static function, iterate until no changes are made. 635bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 636046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson while (!DeferredDeclsToEmit.empty() || !DeferredVTables.empty()) { 637046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson if (!DeferredVTables.empty()) { 638046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson const CXXRecordDecl *RD = DeferredVTables.back(); 639046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson DeferredVTables.pop_back(); 640046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson getVTables().GenerateClassData(getVTableLinkage(RD), RD); 641bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola continue; 642bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola } 643bbf58bb1b8dd8c5e0f07547a6c20ffd55385fcf6Rafael Espindola 6442a131fbca2a51085dc083b8c56a2d4ced3cf1413Anders Carlsson GlobalDecl D = DeferredDeclsToEmit.back(); 64567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.pop_back(); 64667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner 647c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // Check to see if we've already emitted this. This is necessary 648c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // for a couple of reasons: first, decls can end up in the 649c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // deferred-decls queue multiple times, and second, decls can end 650c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // up with definitions in unusual ways (e.g. by an extern inline 651c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // function acquiring a strong function redefinition). Just 652c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // ignore these cases. 653c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // 654c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // TODO: That said, looking this up multiple times is very wasteful. 6555f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Name = getMangledName(D); 656f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *CGRef = GetGlobalValue(Name); 65767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner assert(CGRef && "Deferred decl wasn't referenced?"); 6581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 65967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (!CGRef->isDeclaration()) 66067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner continue; 6611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 662c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // GlobalAlias::isDeclaration() defers to the aliasee, but for our 663c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall // purposes an alias counts as a definition. 664c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall if (isa<llvm::GlobalAlias>(CGRef)) 665c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall continue; 666c76702cc80c1ef8a94d82b62ddcb4ed4f67d5b8cJohn McCall 66767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Otherwise, emit the definition and move on to the next one. 66867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner EmitGlobalDefinition(D); 66967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 6705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 67277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougevoid CodeGenModule::EmitGlobalAnnotations() { 67377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (Annotations.empty()) 67477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return; 67577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 67677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge // Create a new global variable for the ConstantStruct in the Module. 67777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::Constant *Array = llvm::ConstantArray::get(llvm::ArrayType::get( 67877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge Annotations[0]->getType(), Annotations.size()), Annotations); 67977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::GlobalValue *gv = new llvm::GlobalVariable(getModule(), 68077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge Array->getType(), false, llvm::GlobalValue::AppendingLinkage, Array, 68177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge "llvm.global.annotations"); 68277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge gv->setSection(AnnotationSection); 68377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 68477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 68577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougellvm::Constant *CodeGenModule::EmitAnnotationString(llvm::StringRef Str) { 68677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::StringMap<llvm::Constant*>::iterator i = AnnotationStrings.find(Str); 68777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (i != AnnotationStrings.end()) 68877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return i->second; 68977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 69077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge // Not found yet, create a new global. 69177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::Constant *s = llvm::ConstantArray::get(getLLVMContext(), Str, true); 69277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::GlobalValue *gv = new llvm::GlobalVariable(getModule(), s->getType(), 69377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge true, llvm::GlobalValue::PrivateLinkage, s, ".str"); 69477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge gv->setSection(AnnotationSection); 69577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge gv->setUnnamedAddr(true); 69677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge AnnotationStrings[Str] = gv; 69777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return gv; 69877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 69977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 70077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougellvm::Constant *CodeGenModule::EmitAnnotationUnit(SourceLocation Loc) { 70177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge SourceManager &SM = getContext().getSourceManager(); 70277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge PresumedLoc PLoc = SM.getPresumedLoc(Loc); 70377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (PLoc.isValid()) 70477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return EmitAnnotationString(PLoc.getFilename()); 70577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return EmitAnnotationString(SM.getBufferName(Loc)); 70677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 70777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 70877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougellvm::Constant *CodeGenModule::EmitAnnotationLineNo(SourceLocation L) { 70977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge SourceManager &SM = getContext().getSourceManager(); 71077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge PresumedLoc PLoc = SM.getPresumedLoc(L); 71177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge unsigned LineNo = PLoc.isValid() ? PLoc.getLine() : 71277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge SM.getExpansionLineNumber(L); 71377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge return llvm::ConstantInt::get(Int32Ty, LineNo); 71477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 71577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 7161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 7178bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 71877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge SourceLocation L) { 71977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge // Get the globals for file name, annotation, and the line number. 72077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::Constant *AnnoGV = EmitAnnotationString(AA->getAnnotation()), 72177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge *UnitGV = EmitAnnotationUnit(L), 72277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge *LineNoCst = EmitAnnotationLineNo(L); 7238bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 72457d5cee133495bc21d1abdbce45ab05a79274a23Daniel Dunbar // Create the ConstantStruct for the global annotation. 7258bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 72677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::ConstantExpr::getBitCast(GV, Int8PtrTy), 72777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::ConstantExpr::getBitCast(AnnoGV, Int8PtrTy), 72877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::ConstantExpr::getBitCast(UnitGV, Int8PtrTy), 72977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge LineNoCst 7308bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 731c5cbb909e8a27deb8f1a2b6b7bf56a96051af81aChris Lattner return llvm::ConstantStruct::getAnon(Fields); 7328bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 7338bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 73477f68bb90af93b95045fb994e7cd68137adcc132Julien Lerougevoid CodeGenModule::AddGlobalAnnotations(const ValueDecl *D, 73577f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge llvm::GlobalValue *GV) { 73677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge assert(D->hasAttr<AnnotateAttr>() && "no annotate attribute"); 73777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge // Get the struct elements for these annotations. 73877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge for (specific_attr_iterator<AnnotateAttr> 73977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge ai = D->specific_attr_begin<AnnotateAttr>(), 74077f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge ae = D->specific_attr_end<AnnotateAttr>(); ai != ae; ++ai) 74177f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge Annotations.push_back(EmitAnnotateAttr(GV, *ai, D->getLocation())); 74277f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge} 74377f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge 744a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidisbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 74590e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis // Never defer when EmitAllDecls is specified. 74690e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis if (Features.EmitAllDecls) 747a6d6af308bfc9b72467b432a045a9fc6673e3821Argyrios Kyrtzidis return false; 7480b6bc8bd7a1d2a7d7478d13d78cff94cacad61fcDouglas Gregor 7494ac7c0bb39696e92fd220118fedc484c09a69870Argyrios Kyrtzidis return !getContext().DeclMustBeEmitted(Global); 75073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 75173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 7526a836706c40a31c716952b74785102c90fd6afa7Rafael Espindolallvm::Constant *CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { 7536a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const AliasAttr *AA = VD->getAttr<AliasAttr>(); 7546a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola assert(AA && "No alias?"); 7556a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7562acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); 7576a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7586a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // See if there is already something with the target's name in the module. 759f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); 7606a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7616a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::Constant *Aliasee; 7626a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (isa<llvm::FunctionType>(DeclTy)) 7631faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 7641faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 7656a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola else 766f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 7676a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::PointerType::getUnqual(DeclTy), 0); 7686a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (!Entry) { 7696a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola llvm::GlobalValue* F = cast<llvm::GlobalValue>(Aliasee); 7706a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola F->setLinkage(llvm::Function::ExternalWeakLinkage); 7716a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.insert(F); 7726a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 7736a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 7746a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return Aliasee; 7756a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola} 7766a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 777b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobal(GlobalDecl GD) { 7784a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *Global = cast<ValueDecl>(GD.getDecl()); 7791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7806a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola // Weak references don't produce any output by themselves. 7816a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (Global->hasAttr<WeakRefAttr>()) 7826a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola return; 7836a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 784bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If this is an alias definition (which otherwise looks like a declaration) 785bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // emit it now. 78640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (Global->hasAttr<AliasAttr>()) 787f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return EmitAliasDefinition(GD); 788219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 789d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne // If this is CUDA, be selective about which declarations we emit. 790d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne if (Features.CUDA) { 791d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne if (CodeGenOpts.CUDAIsDevice) { 792d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne if (!Global->hasAttr<CUDADeviceAttr>() && 793d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne !Global->hasAttr<CUDAGlobalAttr>() && 794d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne !Global->hasAttr<CUDAConstantAttr>() && 795d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne !Global->hasAttr<CUDASharedAttr>()) 796d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne return; 797d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne } else { 798d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne if (!Global->hasAttr<CUDAHostAttr>() && ( 799d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne Global->hasAttr<CUDADeviceAttr>() || 800d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne Global->hasAttr<CUDAConstantAttr>() || 801d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne Global->hasAttr<CUDASharedAttr>())) 802d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne return; 803d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne } 804d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne } 805d51e43af0b3a6897b971f316c4de2035ec82d1f2Peter Collingbourne 80667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Ignore declarations, they will be emitted on their first use. 8075e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 80873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 809dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky if (!FD->doesThisDeclarationHaveABody()) { 810dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky if (!FD->doesDeclarationForceExternallyVisibleDefinition()) 811dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky return; 812dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky 813dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky const FunctionDecl *InlineDefinition = 0; 814dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky FD->getBody(InlineDefinition); 815dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky 8165f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(GD); 817dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky llvm::StringMap<GlobalDecl>::iterator DDI = 818dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky DeferredDecls.find(MangledName); 819dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky if (DDI != DeferredDecls.end()) 820dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky DeferredDecls.erase(DDI); 821dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky EmitGlobalDefinition(InlineDefinition); 82273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 823dce67a70a86db8758c926a76fdd980f5369d5746Nick Lewycky } 8240269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 8250269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 826bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 827bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 828a9a55c063e9e59c6ab0a6d7a21302660f7bde9f9Douglas Gregor if (VD->isThisDeclarationADefinition() != VarDecl::Definition) 82973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 8304c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 8314c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 83267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Defer code generation when possible if this is a static definition, inline 83367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // function etc. These we only want to emit if they are used. 8344357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (!MayDeferGeneration(Global)) { 8354357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Emit the definition if it can't be deferred. 8364357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner EmitGlobalDefinition(GD); 837bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 838bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 839bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall 840bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // If we're deferring emission of a C++ variable with an 841bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer, remember the order in which it appeared in the file. 842bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus && isa<VarDecl>(Global) && 843bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall cast<VarDecl>(Global)->hasInit()) { 844bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); 845bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall CXXGlobalInits.push_back(0); 846bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } 8474357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 8484357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // If the value has already been used, add it directly to the 8494357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit list. 8505f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(GD); 8514357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner if (GetGlobalValue(MangledName)) 8524357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDeclsToEmit.push_back(GD); 8534357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner else { 8544357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // Otherwise, remember that we saw a deferred decl with this name. The 8554357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // first use of the mangled name will cause it to move into 8564357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner // DeferredDeclsToEmit. 8574357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner DeferredDecls[MangledName] = GD; 8584357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner } 8594c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 8604c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 861b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) { 8624a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 8631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 864cb421fa690da545b58a720abe5f1c49b166dbde7Dan Gohman PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), 8658e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson Context.getSourceManager(), 8668e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson "Generating code for declaration"); 8678e2efcc267ed12dc435782288b7f9a4a1bc56c72Anders Carlsson 86844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 86944eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // At -O0, don't generate IR for functions with available_externally 87044eac33ae12df384f3f002102f919f603bee330fDouglas Gregor // linkage. 8717feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor if (CodeGenOpts.OptimizationLevel == 0 && 8727feaeeed1789fbf357fc81072966fe8f62fb4a81Douglas Gregor !Function->hasAttr<AlwaysInlineAttr>() && 87344eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getFunctionLinkage(Function) 87444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor == llvm::Function::AvailableExternallyLinkage) 87544eac33ae12df384f3f002102f919f603bee330fDouglas Gregor return; 87644eac33ae12df384f3f002102f919f603bee330fDouglas Gregor 87744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { 8787dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman // Make sure to emit the definition(s) before we emit the thunks. 8797dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman // This is necessary for the generation of certain thunks. 8807dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(Method)) 8817dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitCXXConstructor(CD, GD.getCtorType()); 8827dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman else if (const CXXDestructorDecl *DD =dyn_cast<CXXDestructorDecl>(Method)) 8837dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitCXXDestructor(DD, GD.getDtorType()); 8847dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman else 8857dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman EmitGlobalFunctionDefinition(GD); 8867dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman 88744eac33ae12df384f3f002102f919f603bee330fDouglas Gregor if (Method->isVirtual()) 88844eac33ae12df384f3f002102f919f603bee330fDouglas Gregor getVTables().EmitThunks(GD); 8897270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson 8907dcdf5ba9324a9577461eae302e88fdd52e310c5Eli Friedman return; 89144eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 892b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 893b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalFunctionDefinition(GD); 89444eac33ae12df384f3f002102f919f603bee330fDouglas Gregor } 895b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner 896b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 897b5e8156ebd6accd27daeaae6971597c45d5e5139Chris Lattner return EmitGlobalVarDefinition(VD); 8984357a8291d759f6f9c36d3edeee8476d3eaf0804Chris Lattner 899b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Invalid argument to EmitGlobalDefinition()"); 900bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 901bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 90274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMFunction - If the specified mangled name is not in the 90374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// module, create and return an llvm Function with the specified type. If there 90474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 90574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 90674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 90774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 90874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the function when it is first created. 909f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 9105f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerCodeGenModule::GetOrCreateLLVMFunction(StringRef MangledName, 9112acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty, 912f85e193739c953358c865005855253af4f68a497John McCall GlobalDecl D, bool ForVTable, 913f85e193739c953358c865005855253af4f68a497John McCall llvm::Attributes ExtraAttrs) { 9140558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Lookup the entry, lazily creating it if necessary. 915f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 9160558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry) { 9176a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 9186a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola const FunctionDecl *FD = cast_or_null<FunctionDecl>(D.getDecl()); 9196a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (FD && !FD->hasAttr<WeakAttr>()) 9207270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 9216a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 9226a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 9236a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 9246a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 9250558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (Entry->getType()->getElementType() == Ty) 9260558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner return Entry; 9271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9280558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Make sure the result is of the correct type. 9299cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner return llvm::ConstantExpr::getBitCast(Entry, Ty->getPointerTo()); 9300558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 9311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 932654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // This function doesn't have a complete type (for example, the return 933654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // type is an incomplete struct). Use a fake type instead, and make 934654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman // sure not to try to set attributes. 935654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman bool IsIncompleteFunction = false; 936784f21121a6c9418ebd86baa6814e36e1176c410John McCall 9372acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *FTy; 938784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (isa<llvm::FunctionType>(Ty)) { 939784f21121a6c9418ebd86baa6814e36e1176c410John McCall FTy = cast<llvm::FunctionType>(Ty); 940784f21121a6c9418ebd86baa6814e36e1176c410John McCall } else { 9410774cb84719f2aea3016493a2bbd9a02aa3e0541John McCall FTy = llvm::FunctionType::get(VoidTy, false); 942654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman IsIncompleteFunction = true; 943654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman } 944bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 945784f21121a6c9418ebd86baa6814e36e1176c410John McCall llvm::Function *F = llvm::Function::Create(FTy, 946654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman llvm::Function::ExternalLinkage, 947f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall MangledName, &getModule()); 948f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(F->getName() == MangledName && "name was uniqued!"); 949654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman if (D.getDecl()) 950b2bcf1c176b200b36f371e189ce22f93c86cdf45Anders Carlsson SetFunctionAttributes(D, F, IsIncompleteFunction); 951f85e193739c953358c865005855253af4f68a497John McCall if (ExtraAttrs != llvm::Attribute::None) 952f85e193739c953358c865005855253af4f68a497John McCall F->addFnAttr(ExtraAttrs); 953654ad40f27d684e8f3eddbc990247a6dbea5ddedEli Friedman 95467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 95567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 95667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 957f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 95867b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 95967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 96067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 96167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 96267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 963bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall 964bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Otherwise, there are cases we have to worry about where we're 965bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // using a declaration for which we must emit a definition but where 966bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // we might not find a top-level definition: 967bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - member functions defined inline in their classes 968bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - friend functions defined inline in some class 969bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // - special member functions with implicit definitions 970bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // If we ever change our AST traversal to walk into class methods, 971bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // this will be unnecessary. 9721faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // 9731faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // We also don't emit a definition for a function if it's going to be an entry 9741faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson // in a vtable, unless it's already marked as used. 97501de7a44cea9f77cbcda65faad8edc8b48a3b617Rafael Espindola } else if (getLangOptions().CPlusPlus && D.getDecl()) { 976bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall // Look for a declaration that's lexically in a record. 977bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall const FunctionDecl *FD = cast<FunctionDecl>(D.getDecl()); 978bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall do { 979bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { 9801faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson if (FD->isImplicit() && !ForVTable) { 981bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall assert(FD->isUsed() && "Sema didn't mark implicit function as used!"); 982a29bf41b8f49578207ce36f6b21ff9bb7ee77babDouglas Gregor DeferredDeclsToEmit.push_back(D.getWithDecl(FD)); 983bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 98410620eb5164e31208fcbf0437cd79ae535ed0559Sean Hunt } else if (FD->doesThisDeclarationHaveABody()) { 985a29bf41b8f49578207ce36f6b21ff9bb7ee77babDouglas Gregor DeferredDeclsToEmit.push_back(D.getWithDecl(FD)); 986bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall break; 987bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } 9887b9a5aa7c0d76f577699d25ce6afe21ecccb60b7Rafael Espindola } 989bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall FD = FD->getPreviousDeclaration(); 990bfdcdc8e26097c9dbb4c40d78296f6ccc3e6684cJohn McCall } while (FD); 99167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 9921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 993784f21121a6c9418ebd86baa6814e36e1176c410John McCall // Make sure the result is of the requested type. 994784f21121a6c9418ebd86baa6814e36e1176c410John McCall if (!IsIncompleteFunction) { 995784f21121a6c9418ebd86baa6814e36e1176c410John McCall assert(F->getType()->getElementType() == Ty); 996784f21121a6c9418ebd86baa6814e36e1176c410John McCall return F; 997784f21121a6c9418ebd86baa6814e36e1176c410John McCall } 998784f21121a6c9418ebd86baa6814e36e1176c410John McCall 9999cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 1000784f21121a6c9418ebd86baa6814e36e1176c410John McCall return llvm::ConstantExpr::getBitCast(F, PTy); 10010558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner} 10020558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 100374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfFunction - Return the address of the given function. If Ty is 100474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// non-null, then this function will use the specified type if it has to 100574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create it (this occurs when we see a definition of the function). 1006b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, 10072acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty, 10081faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson bool ForVTable) { 100974391b48b4791cded373683a3baf67314f358d50Chris Lattner // If there was no specific requested type, just convert it now. 101074391b48b4791cded373683a3baf67314f358d50Chris Lattner if (!Ty) 10114a6835e650ff24e19ce08a3bd347c0ad186777fdAnders Carlsson Ty = getTypes().ConvertType(cast<ValueDecl>(GD.getDecl())->getType()); 1012bcaedaed309ce453a992fdeef4a4c908cc7d9dfbChris Lattner 10135f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(GD); 10141faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson return GetOrCreateLLVMFunction(MangledName, Ty, GD, ForVTable); 101574391b48b4791cded373683a3baf67314f358d50Chris Lattner} 101677ba708819285931932ecd33691a672bb59d221aEli Friedman 101774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeFunction - Create a new runtime function with the specified 101874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// type and name. 101974391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 10202acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris LattnerCodeGenModule::CreateRuntimeFunction(llvm::FunctionType *FTy, 10215f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Name, 1022f85e193739c953358c865005855253af4f68a497John McCall llvm::Attributes ExtraAttrs) { 1023f85e193739c953358c865005855253af4f68a497John McCall return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false, 1024f85e193739c953358c865005855253af4f68a497John McCall ExtraAttrs); 102574391b48b4791cded373683a3baf67314f358d50Chris Lattner} 1026bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1027da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregorstatic bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D, 1028da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor bool ConstantInit) { 102988786862424cb2d478516d911709dc19c962af9cJohn McCall if (!D->getType().isConstant(Context) && !D->getType()->isReferenceType()) 103020e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return false; 1031da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor 1032da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (Context.getLangOptions().CPlusPlus) { 1033da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (const RecordType *Record 1034da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor = Context.getBaseElementType(D->getType())->getAs<RecordType>()) 10352bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor return ConstantInit && 10362bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor cast<CXXRecordDecl>(Record->getDecl())->isPOD() && 10372bb110125e0e5adb7c1c65d12adfa34151ca1c47Douglas Gregor !cast<CXXRecordDecl>(Record->getDecl())->hasMutableFields(); 103820e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman } 1039da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor 104020e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman return true; 104120e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman} 104220e098b7e7fda6bed1d67441b56cce77cd3aa918Eli Friedman 104374391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, 104474391b48b4791cded373683a3baf67314f358d50Chris Lattner/// create and return an llvm GlobalVariable with the specified type. If there 104574391b48b4791cded373683a3baf67314f358d50Chris Lattner/// is something in the module with the specified name, return it potentially 104674391b48b4791cded373683a3baf67314f358d50Chris Lattner/// bitcasted to the right type. 104774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// 104874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// If D is non-null, it specifies a decl that correspond to this. This is used 104974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// to set the attributes on the global when it is first created. 1050f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallllvm::Constant * 10515f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerCodeGenModule::GetOrCreateLLVMGlobal(StringRef MangledName, 10522acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::PointerType *Ty, 1053c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola const VarDecl *D, 1054c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola bool UnnamedAddr) { 10553c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 1056f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 105799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 10586a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (WeakRefReferences.count(Entry)) { 10596a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola if (D && !D->hasAttr<WeakAttr>()) 10607270ee4cd4794281c09dfb6931a98bbb2581ef02Anders Carlsson Entry->setLinkage(llvm::Function::ExternalLinkage); 10616a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 10626a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola WeakRefReferences.erase(Entry); 10636a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola } 10646a836706c40a31c716952b74785102c90fd6afa7Rafael Espindola 1065c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola if (UnnamedAddr) 1066c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola Entry->setUnnamedAddr(true); 1067c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola 106874391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Entry->getType() == Ty) 1069570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner return Entry; 10701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 107199b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 10723c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(Entry, Ty); 107399b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 10741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 107567b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // This is the first use or definition of a mangled name. If there is a 107667b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // deferred decl with this name, remember that we need to emit it at the end 107767b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // of the file. 1078f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::StringMap<GlobalDecl>::iterator DDI = DeferredDecls.find(MangledName); 107967b00520c8f5b48fad722b790d87fea6be764efeChris Lattner if (DDI != DeferredDecls.end()) { 108067b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // Move the potentially referenced deferred decl to the DeferredDeclsToEmit 108167b00520c8f5b48fad722b790d87fea6be764efeChris Lattner // list, and remove it from DeferredDecls (since we don't need it anymore). 108267b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDeclsToEmit.push_back(DDI->second); 108367b00520c8f5b48fad722b790d87fea6be764efeChris Lattner DeferredDecls.erase(DDI); 108467b00520c8f5b48fad722b790d87fea6be764efeChris Lattner } 10851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 10871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump new llvm::GlobalVariable(getModule(), Ty->getElementType(), false, 108899b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 1089f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 0, MangledName, 0, 109056ebe5082da7411fb37479e230b52735f77cff35Eli Friedman false, Ty->getAddressSpace()); 109149988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 109299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 109374391b48b4791cded373683a3baf67314f358d50Chris Lattner if (D) { 1094f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: This code is overly simple and should be merged with other global 1095f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // handling. 1096da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor GV->setConstant(DeclIsConstantGlobal(Context, D, false)); 109749988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 1098110e8e56af30363072c140285961592b0107f789John McCall // Set linkage and visibility in case we never see a definition. 1099af14603ca61757cf4361b583b45639a04c57e651John McCall NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility(); 1100af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.linkage() != ExternalLinkage) { 110115e310a3b970b64a84cb30f0005bc396b4d978cbJohn McCall // Don't set internal linkage on declarations. 1102110e8e56af30363072c140285961592b0107f789John McCall } else { 1103110e8e56af30363072c140285961592b0107f789John McCall if (D->hasAttr<DLLImportAttr>()) 1104110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::DLLImportLinkage); 11050a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor else if (D->hasAttr<WeakAttr>() || D->isWeakImported()) 1106110e8e56af30363072c140285961592b0107f789John McCall GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 1107110e8e56af30363072c140285961592b0107f789John McCall 1108af14603ca61757cf4361b583b45639a04c57e651John McCall // Set visibility on a declaration only if it's explicit. 1109af14603ca61757cf4361b583b45639a04c57e651John McCall if (LV.visibilityExplicit()) 1110af14603ca61757cf4361b583b45639a04c57e651John McCall GV->setVisibility(GetLLVMVisibility(LV.visibility())); 1111110e8e56af30363072c140285961592b0107f789John McCall } 111256ebe5082da7411fb37479e230b52735f77cff35Eli Friedman 111356ebe5082da7411fb37479e230b52735f77cff35Eli Friedman GV->setThreadLocal(D->isThreadSpecified()); 111474391b48b4791cded373683a3baf67314f358d50Chris Lattner } 11151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1116f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GV; 111774391b48b4791cded373683a3baf67314f358d50Chris Lattner} 1118eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 1119eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 11203bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlssonllvm::GlobalVariable * 11215f9e272e632e951b1efe824cd16acb4d96077930Chris LattnerCodeGenModule::CreateOrReplaceCXXRuntimeVariable(StringRef Name, 11222acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty, 11233bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalValue::LinkageTypes Linkage) { 11243bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name); 11253bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::GlobalVariable *OldGV = 0; 11263bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 11273bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 11283bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV) { 11293bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Check if the variable has the right type. 11303bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (GV->getType()->getElementType() == Ty) 11313bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 11323bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 11333bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Because C++ name mangling, the only way we can end up with an already 11343bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // existing global with the same name is if it has been declared extern "C". 113596eaf2992b5955d1470fc9cce7a96e7e1e3b4ea7Anders Carlsson assert(GV->isDeclaration() && "Declaration has wrong type!"); 11363bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV = GV; 11373bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 11383bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 11393bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Create a new variable. 11403bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV = new llvm::GlobalVariable(getModule(), Ty, /*isConstant=*/true, 11413bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson Linkage, 0, Name); 11423bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 11433bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (OldGV) { 11443bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson // Replace occurrences of the old variable if needed. 11453bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson GV->takeName(OldGV); 11463bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 11473bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson if (!OldGV->use_empty()) { 11483bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::Constant *NewPtrForOldDecl = 11493bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); 11503bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->replaceAllUsesWith(NewPtrForOldDecl); 11513bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 11523bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 11533bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson OldGV->eraseFromParent(); 11543bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson } 11553bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 11563bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson return GV; 11573bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson} 11583bd6202ea2d5b5f7c8229cd280a846ae3dcf2355Anders Carlsson 115974391b48b4791cded373683a3baf67314f358d50Chris Lattner/// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the 116074391b48b4791cded373683a3baf67314f358d50Chris Lattner/// given global variable. If Ty is non-null and if the global doesn't exist, 116174391b48b4791cded373683a3baf67314f358d50Chris Lattner/// then it will be greated with the specified type instead of whatever the 116274391b48b4791cded373683a3baf67314f358d50Chris Lattner/// normal requested type would be. 116374391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, 11642acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty) { 116574391b48b4791cded373683a3baf67314f358d50Chris Lattner assert(D->hasGlobalStorage() && "Not a global variable"); 116674391b48b4791cded373683a3baf67314f358d50Chris Lattner QualType ASTTy = D->getType(); 116774391b48b4791cded373683a3baf67314f358d50Chris Lattner if (Ty == 0) 116874391b48b4791cded373683a3baf67314f358d50Chris Lattner Ty = getTypes().ConvertTypeForMem(ASTTy); 11691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11702acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::PointerType *PTy = 1171207f4d8543529221932af82836016a2ef066c917Peter Collingbourne llvm::PointerType::get(Ty, getContext().getTargetAddressSpace(ASTTy)); 1172f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 11735f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(D); 1174f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return GetOrCreateLLVMGlobal(MangledName, PTy, D); 117574391b48b4791cded373683a3baf67314f358d50Chris Lattner} 11763f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 117774391b48b4791cded373683a3baf67314f358d50Chris Lattner/// CreateRuntimeVariable - Create a new runtime global variable with the 117874391b48b4791cded373683a3baf67314f358d50Chris Lattner/// specified type and name. 117974391b48b4791cded373683a3baf67314f358d50Chris Lattnerllvm::Constant * 11802acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris LattnerCodeGenModule::CreateRuntimeVariable(llvm::Type *Ty, 11815f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Name) { 11821de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall return GetOrCreateLLVMGlobal(Name, llvm::PointerType::getUnqual(Ty), 0, 1183c532b502858032f377056dc8cba2fe43cba8702bRafael Espindola true); 1184bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1185bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 118603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbarvoid CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { 118703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!D->getInit() && "Cannot emit definite definitions here!"); 118803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 11897520bd1de12af10ea08c662440565adbdf589317Douglas Gregor if (MayDeferGeneration(D)) { 11907520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // If we have not seen a reference to this variable yet, place it 11917520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // into the deferred declarations table to be emitted if needed 11927520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // later. 11935f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(D); 1194f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (!GetGlobalValue(MangledName)) { 1195555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson DeferredDecls[MangledName] = D; 119603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar return; 11977520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 11987520bd1de12af10ea08c662440565adbdf589317Douglas Gregor } 11997520bd1de12af10ea08c662440565adbdf589317Douglas Gregor 12007520bd1de12af10ea08c662440565adbdf589317Douglas Gregor // The tentative definition is the only definition. 120103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar EmitGlobalVarDefinition(D); 120203f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar} 120303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar 12046fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregorvoid CodeGenModule::EmitVTable(CXXRecordDecl *Class, bool DefinitionRequired) { 12056fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor if (DefinitionRequired) 12066fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor getVTables().GenerateClassData(getVTableLinkage(Class), Class); 12076fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor} 12086fb745bdf1ff1e32caf07e42093a7920726892c1Douglas Gregor 12094b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregorllvm::GlobalVariable::LinkageTypes 1210046c294a43024874ff35656c6e785b64e72f1f36Anders CarlssonCodeGenModule::getVTableLinkage(const CXXRecordDecl *RD) { 1211cb5d2d0647fdab2e36c85b417e03bf18916ce10cEli Friedman if (RD->getLinkage() != ExternalLinkage) 1212dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor return llvm::GlobalVariable::InternalLinkage; 1213dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 1214dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor if (const CXXMethodDecl *KeyFunction 1215dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor = RD->getASTContext().getKeyFunction(RD)) { 1216dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // If this class has a key function, use that to determine the linkage of 1217dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // the vtable. 12184b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor const FunctionDecl *Def = 0; 121906a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (KeyFunction->hasBody(Def)) 12204b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor KeyFunction = cast<CXXMethodDecl>(Def); 1221dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 12224b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor switch (KeyFunction->getTemplateSpecializationKind()) { 12234b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_Undeclared: 12244b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitSpecialization: 12256d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // When compiling with optimizations turned on, we emit all vtables, 12266d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // even if the key function is not defined in the current translation 12276d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson // unit. If this is the case, use available_externally linkage. 12286d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson if (!Def && CodeGenOpts.OptimizationLevel) 12296d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson return llvm::GlobalVariable::AvailableExternallyLinkage; 12306d7f8473cd6e967b3676948894ce72472102f9cbAnders Carlsson 12314b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor if (KeyFunction->isInlined()) 1232142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1233142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1234142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 12354b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 12364b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor return llvm::GlobalVariable::ExternalLinkage; 12374b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 12384b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ImplicitInstantiation: 1239142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1240142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1241142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1242f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 12434b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDefinition: 1244142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1245142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::WeakODRLinkage : 1246142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 1247f502d93b0ea970bfbd897e657f8d940a20984de2Anders Carlsson 12484b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor case TSK_ExplicitInstantiationDeclaration: 12494b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // FIXME: Use available_externally linkage. However, this currently 12504b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // breaks LLVM's build due to undefined symbols. 12514b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1252142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian return !Context.getLangOptions().AppleKext ? 1253142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::GlobalVariable::LinkOnceODRLinkage : 1254142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian llvm::Function::InternalLinkage; 12554b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 1256dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor } 1257dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor 125853bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian if (Context.getLangOptions().AppleKext) 125953bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::Function::InternalLinkage; 126053bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian 1261dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor switch (RD->getTemplateSpecializationKind()) { 1262dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_Undeclared: 1263dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ExplicitSpecialization: 1264dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor case TSK_ImplicitInstantiation: 1265dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // FIXME: Use available_externally linkage. However, this currently 1266dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // breaks LLVM's build due to undefined symbols. 1267dffb8010a130733f1b55acf0af01deb0a2e083d3Douglas Gregor // return llvm::GlobalVariable::AvailableExternallyLinkage; 1268142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDeclaration: 126953bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 1270142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian 1271142f9e99018a85105cee570133c111a52f2053ecFariborz Jahanian case TSK_ExplicitInstantiationDefinition: 127253bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 12734b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor } 12744b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 12754b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor // Silence GCC warning. 127653bad4e98ed5e765df4231099bf1c737582908bfFariborz Jahanian return llvm::GlobalVariable::LinkOnceODRLinkage; 12774b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor} 12784b0f21c0f8bed0e2a7dc62d73be64e7e277d6c9aDouglas Gregor 12792acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris LattnerCharUnits CodeGenModule::GetTargetTypeStoreSize(llvm::Type *Ty) const { 128006f486ecd05bd6788da97c39164c1903a084c26dKen Dyck return Context.toCharUnitsFromBits( 128106f486ecd05bd6788da97c39164c1903a084c26dKen Dyck TheTargetData.getTypeStoreSizeInBits(Ty)); 1282687cc4a850b59116efee061018f0d8df50728b82Ken Dyck} 1283687cc4a850b59116efee061018f0d8df50728b82Ken Dyck 1284bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 12858f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 128677ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 12876c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman bool NonConstInit = false; 12881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 128931310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl const Expr *InitExpr = D->getAnyInitializer(); 12903bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson 12913bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson if (!InitExpr) { 1292cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 129303f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // implicitly initialized with { 0 }. 129403f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // 129503f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // Note that tentative definitions are only emitted at the end of 129603f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // a translation unit, so they should never have incomplete 129703f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // type. In addition, EmitTentativeDefinition makes sure that we 129803f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // never attempt to emit a tentative definition if a real one 129903f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // exists. A use may still exists, however, so we still may need 130003f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar // to do a RAUW. 130103f5ad9a7707e098f601921fcec17ed65eb355a7Daniel Dunbar assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type"); 1302b0d0ea042116c1f451d3db8ceff9f1dd92bc36d2Anders Carlsson Init = EmitNullConstant(D->getType()); 130377ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 1304c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor Init = EmitConstantExpr(InitExpr, D->getType()); 13056e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 13063bb92693c3332c1e99870a4e45afff3892e1c6aeAnders Carlsson QualType T = InitExpr->getType(); 1307c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor if (D->getType()->isReferenceType()) 1308c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor T = D->getType(); 1309c446d1816f46a4b6d2337102dfc001f55fc18211Douglas Gregor 131089ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson if (getLangOptions().CPlusPlus) { 131189ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = EmitNullConstant(T); 13126c6bda3b0b1d8adaac2ba3f4da7056e9f1eef52eEli Friedman NonConstInit = true; 131389ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } else { 131489ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson ErrorUnsupported(D, "static initializer"); 131589ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 131689ed31d3f9eeb8ec77c284a5cf404a74bf5e7acfAnders Carlsson } 1317bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall } else { 1318bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // We don't need an initializer, so remove the entry for the delayed 1319bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall // initializer position (just in case this entry was delayed). 1320bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall if (getLangOptions().CPlusPlus) 1321bf40cb518312dde1c07e44fcae59bc4eec65589cJohn McCall DelayedCXXInitPosition.erase(D); 13226e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 13238f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 13248e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 13252acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type* InitType = Init->getType(); 1326570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::Constant *Entry = GetAddrOfGlobalVar(D, InitType); 13271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1328570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Strip off a bitcast if we got one back. 1329570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 13309d4a15fd3b85434c43ea27562793de63a793321aChris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast || 13319d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // all zero index gep. 13329d4a15fd3b85434c43ea27562793de63a793321aChris Lattner CE->getOpcode() == llvm::Instruction::GetElementPtr); 1333570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry = CE->getOperand(0); 1334570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner } 13351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1336570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Entry is now either a Function or GlobalVariable. 1337570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner llvm::GlobalVariable *GV = dyn_cast<llvm::GlobalVariable>(Entry); 13381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1339570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We have a definition after a declaration with the wrong type. 1340570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // We must make a new GlobalVariable* and update everything that used OldGV 1341570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (a declaration or tentative definition) with the new GlobalVariable* 1342570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // (which will be a definition). 1343570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // 1344570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // This happens if there is a prototype for a global (e.g. 1345570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "extern int x[];") and then a definition of a different type (e.g. 1346570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // "int x[10];"). This also happens when an initializer has a different type 1347570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // from the type of the global (this happens with unions). 1348570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner if (GV == 0 || 1349570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV->getType()->getElementType() != InitType || 1350207f4d8543529221932af82836016a2ef066c917Peter Collingbourne GV->getType()->getAddressSpace() != 1351207f4d8543529221932af82836016a2ef066c917Peter Collingbourne getContext().getTargetAddressSpace(ASTTy)) { 13521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1353f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // Move the old entry aside so that we'll create a new one. 13545f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Entry->setName(StringRef()); 1355232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 1356570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner // Make a new global with the correct type, this is now guaranteed to work. 1357570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner GV = cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, InitType)); 13580558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner 135977ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 13601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 13613c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(GV, Entry->getType()); 1362570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 136377ba708819285931932ecd33691a672bb59d221aEli Friedman 136477ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 1365570585c91dee98d7ba8ccf1198c03208ba17966bChris Lattner cast<llvm::GlobalValue>(Entry)->eraseFromParent(); 136677ba708819285931932ecd33691a672bb59d221aEli Friedman } 136777ba708819285931932ecd33691a672bb59d221aEli Friedman 136877f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (D->hasAttr<AnnotateAttr>()) 136977f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge AddGlobalAnnotations(D, GV); 13708bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 137188a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 1372e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner 1373e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner // If it is safe to mark the global 'constant', do so now. 1374e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(false); 1375da55074866ca2fe7f718c5d3334648d6e340fb15Douglas Gregor if (!NonConstInit && DeclIsConstantGlobal(Context, D, true)) 1376e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner GV->setConstant(true); 13771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13788b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck GV->setAlignment(getContext().getDeclAlign(D).getQuantity()); 1379354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 138088a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 1381354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage = 1382354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GetLLVMLinkageVarDefinition(D, GV); 1383354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setLinkage(Linkage); 1384354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian if (Linkage == llvm::GlobalVariable::CommonLinkage) 1385354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // common vars aren't constant even if declared const. 1386354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian GV->setConstant(false); 1387354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1388354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian SetCommonAttributes(D, GV); 1389354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 13903030eb82593097502469a8b3fc26112c79c75605John McCall // Emit the initializer function if necessary. 13913030eb82593097502469a8b3fc26112c79c75605John McCall if (NonConstInit) 13923030eb82593097502469a8b3fc26112c79c75605John McCall EmitCXXGlobalVarDeclInitFunc(D, GV); 13933030eb82593097502469a8b3fc26112c79c75605John McCall 1394354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian // Emit global variable debug information. 139573fb35003aad027492e661a3749e921b5d1ecaf9Eric Christopher if (CGDebugInfo *DI = getModuleDebugInfo()) 1396354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian DI->EmitGlobalVariable(GV, D); 1397354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian} 1398354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian 1399354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanianllvm::GlobalValue::LinkageTypes 1400354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz JahanianCodeGenModule::GetLLVMLinkageVarDefinition(const VarDecl *D, 1401354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian llvm::GlobalVariable *GV) { 140290e99a84ddd020e8fda79643748243725a2ed071Argyrios Kyrtzidis GVALinkage Linkage = getContext().GetGVALinkageForVariable(D); 1403a0f00a71fcb0f98298709d5e5318339acf7958acDouglas Gregor if (Linkage == GVA_Internal) 1404354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::InternalLinkage; 140540b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLImportAttr>()) 1406354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLImportLinkage; 140740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis else if (D->hasAttr<DLLExportAttr>()) 1408354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::Function::DLLExportLinkage; 1409e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else if (D->hasAttr<WeakAttr>()) { 1410e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner if (GV->isConstant()) 1411354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakODRLinkage; 1412e78b86f3201ae5f09e2cf85bd6558f1d9b34de26Chris Lattner else 1413354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::WeakAnyLinkage; 14148f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor } else if (Linkage == GVA_TemplateInstantiation || 14158f51a4f2d00b0abda3cde7f3828fb2e2b9beafb5Douglas Gregor Linkage == GVA_ExplicitTemplateInstantiation) 141699ace16bc6962f1fc3dc45bbbdf2eb74e555a8adJohn McCall return llvm::GlobalVariable::WeakODRLinkage; 1417a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher else if (!getLangOptions().CPlusPlus && 1418a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher ((!CodeGenOpts.NoCommon && !D->getAttr<NoCommonAttr>()) || 1419a6cf1e709b96865210b81bd611d41e9a2d41500aEric Christopher D->getAttr<CommonAttr>()) && 1420309457d0f1b416c1b379c9f3e172848adffedb23Chris Lattner !D->hasExternalStorage() && !D->getInit() && 1421ab27d6ea7b4ce2762a16905281de796db32bb6f2Fariborz Jahanian !D->getAttr<SectionAttr>() && !D->isThreadSpecified() && 1422ab27d6ea7b4ce2762a16905281de796db32bb6f2Fariborz Jahanian !D->getAttr<WeakImportAttr>()) { 142391f31dc234bbc98f3dd20e6741a7b0b98c7916bfEric Christopher // Thread local vars aren't considered common linkage. 1424354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::CommonLinkage; 1425686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 1426354e712c81fbb07c0ce5f06180788b25fffa1b56Fariborz Jahanian return llvm::GlobalVariable::ExternalLinkage; 142788a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 14285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1429bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we 1430bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// implement a function with no prototype, e.g. "int foo() {}". If there are 1431bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// existing call uses of the old function in the module, this adjusts them to 1432bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// call the new function directly. 1433bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// 1434bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// This is not just a cleanup: the always_inline pass requires direct calls to 1435bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// functions to be able to inline them. If there is a bitcast in the way, it 1436bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// won't inline them. Instcombine normally deletes these calls, but it isn't 1437bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner/// run at -O0. 1438bdb0132722082886558f31eccdba06ae1852c0eeChris Lattnerstatic void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, 1439bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *NewFn) { 1440bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If we're redefining a global as a function, don't transform it. 1441bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::Function *OldFn = dyn_cast<llvm::Function>(Old); 1442bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (OldFn == 0) return; 14431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14442acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *NewRetTy = NewFn->getReturnType(); 14455f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Value*, 4> ArgList; 1446bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1447bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Value::use_iterator UI = OldFn->use_begin(), E = OldFn->use_end(); 1448dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer UI != E; ) { 1449bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // TODO: Do invokes ever occur in C code? If so, we should handle them too. 1450dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::Value::use_iterator I = UI++; // Increment before the CI is erased. 1451dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer llvm::CallInst *CI = dyn_cast<llvm::CallInst>(*I); 14528670cd3ea4dfbf86caacd270ec2441e9949bbb6aGabor Greif if (!CI) continue; // FIXME: when we allow Invoke, just do CallSite CS(*I) 145335db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif llvm::CallSite CS(CI); 1454dbf02bccc9fc1115cb7dd45c84df77252d68f220Benjamin Kramer if (!CI || !CS.isCallee(I)) continue; 14551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1456bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the return types don't match exactly, and if the call isn't dead, then 1457bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // we can't transform this call. 1458bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (CI->getType() != NewRetTy && !CI->use_empty()) 1459bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 1460bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 146140f9c302f23a35611cd354f40b22b37f2c554a40John McCall // Get the attribute list. 146240f9c302f23a35611cd354f40b22b37f2c554a40John McCall llvm::SmallVector<llvm::AttributeWithIndex, 8> AttrVec; 146340f9c302f23a35611cd354f40b22b37f2c554a40John McCall llvm::AttrListPtr AttrList = CI->getAttributes(); 146440f9c302f23a35611cd354f40b22b37f2c554a40John McCall 146540f9c302f23a35611cd354f40b22b37f2c554a40John McCall // Get any return attributes. 146640f9c302f23a35611cd354f40b22b37f2c554a40John McCall llvm::Attributes RAttrs = AttrList.getRetAttributes(); 146740f9c302f23a35611cd354f40b22b37f2c554a40John McCall 146840f9c302f23a35611cd354f40b22b37f2c554a40John McCall // Add the return attributes. 146940f9c302f23a35611cd354f40b22b37f2c554a40John McCall if (RAttrs) 147040f9c302f23a35611cd354f40b22b37f2c554a40John McCall AttrVec.push_back(llvm::AttributeWithIndex::get(0, RAttrs)); 147140f9c302f23a35611cd354f40b22b37f2c554a40John McCall 1472bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If the function was passed too few arguments, don't transform. If extra 1473bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // arguments were passed, we silently drop them. If any of the types 1474bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // mismatch, we don't transform. 1475bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner unsigned ArgNo = 0; 1476bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner bool DontTransform = false; 1477bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner for (llvm::Function::arg_iterator AI = NewFn->arg_begin(), 1478bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner E = NewFn->arg_end(); AI != E; ++AI, ++ArgNo) { 147935db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif if (CS.arg_size() == ArgNo || 148035db3b9aad1829a1279b9e213ddee36395314a0bGabor Greif CS.getArgument(ArgNo)->getType() != AI->getType()) { 1481bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner DontTransform = true; 1482bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner break; 1483bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 148440f9c302f23a35611cd354f40b22b37f2c554a40John McCall 148540f9c302f23a35611cd354f40b22b37f2c554a40John McCall // Add any parameter attributes. 148640f9c302f23a35611cd354f40b22b37f2c554a40John McCall if (llvm::Attributes PAttrs = AttrList.getParamAttributes(ArgNo + 1)) 148740f9c302f23a35611cd354f40b22b37f2c554a40John McCall AttrVec.push_back(llvm::AttributeWithIndex::get(ArgNo + 1, PAttrs)); 1488bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1489bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (DontTransform) 1490bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner continue; 14911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 149240f9c302f23a35611cd354f40b22b37f2c554a40John McCall if (llvm::Attributes FnAttrs = AttrList.getFnAttributes()) 149340f9c302f23a35611cd354f40b22b37f2c554a40John McCall AttrVec.push_back(llvm::AttributeWithIndex::get(~0, FnAttrs)); 149440f9c302f23a35611cd354f40b22b37f2c554a40John McCall 1495bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Okay, we can transform this. Create the new call instruction and copy 1496bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // over the required information. 14976ba728d9687b2617793f5afd410650a8d6c71080Gabor Greif ArgList.append(CS.arg_begin(), CS.arg_begin() + ArgNo); 14984c7d9f1507d0f102bd4133bba63348636facd469Jay Foad llvm::CallInst *NewCall = llvm::CallInst::Create(NewFn, ArgList, "", CI); 1499bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ArgList.clear(); 1500ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (!NewCall->getType()->isVoidTy()) 1501bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner NewCall->takeName(CI); 150240f9c302f23a35611cd354f40b22b37f2c554a40John McCall NewCall->setAttributes(llvm::AttrListPtr::get(AttrVec.begin(), 150340f9c302f23a35611cd354f40b22b37f2c554a40John McCall AttrVec.end())); 1504ca6408c3176783f0b29da4679a08512aa05f0c73Daniel Dunbar NewCall->setCallingConv(CI->getCallingConv()); 1505bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1506bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // Finally, remove the old call, replacing any uses with the new one. 150700549fcec0490b2daf27543e532f94adbb186063Chris Lattner if (!CI->use_empty()) 150800549fcec0490b2daf27543e532f94adbb186063Chris Lattner CI->replaceAllUsesWith(NewCall); 15093b122bc5f1203615e2128e0c1a63da438865b1ccDevang Patel 1510c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner // Copy debug location attached to CI. 1511c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner if (!CI->getDebugLoc().isUnknown()) 1512c60346388d60b1756f3675dabb60dc58da0728ecChris Lattner NewCall->setDebugLoc(CI->getDebugLoc()); 1513bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner CI->eraseFromParent(); 1514bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 1515bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner} 1516bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner 1517bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1518b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattnervoid CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD) { 1519b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner const FunctionDecl *D = cast<FunctionDecl>(GD.getDecl()); 1520d26bc76c98006609002d9930f8840490e88ac5b5John McCall 15211f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall // Compute the function info and LLVM type. 1522d26bc76c98006609002d9930f8840490e88ac5b5John McCall const CGFunctionInfo &FI = getTypes().getFunctionInfo(GD); 15231f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall bool variadic = false; 15241f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall if (const FunctionProtoType *fpt = D->getType()->getAs<FunctionProtoType>()) 15251f6f961293da9c2b1c23da2411c1b439a9502ed0John McCall variadic = fpt->isVariadic(); 15262acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *Ty = getTypes().GetFunctionType(FI, variadic); 1527d26bc76c98006609002d9930f8840490e88ac5b5John McCall 15289fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner // Get or create the prototype for the function. 1529b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Constant *Entry = GetAddrOfFunction(GD, Ty); 15301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15310558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner // Strip off a bitcast if we got one back. 15320558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (llvm::ConstantExpr *CE = dyn_cast<llvm::ConstantExpr>(Entry)) { 15330558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner assert(CE->getOpcode() == llvm::Instruction::BitCast); 15340558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = CE->getOperand(0); 15350558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner } 15361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15380558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner if (cast<llvm::GlobalValue>(Entry)->getType()->getElementType() != Ty) { 1539bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner llvm::GlobalValue *OldFn = cast<llvm::GlobalValue>(Entry); 15401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 154142745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 1542bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner assert(OldFn->isDeclaration() && 15430558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner "Shouldn't replace non-declaration"); 154434809507232bc4c3c4840c7d092c7440219fddafChris Lattner 154562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 154662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 154762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 154862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 154962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 155062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 1551f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // (e.g. "int f(int x)"). Move the old function aside so that it 1552f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // doesn't interfere with GetAddrOfFunction. 15535f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner OldFn->setName(StringRef()); 1554b4880bab7fc1b61267cfd9a0ad52188e7a828cb3Chris Lattner llvm::Function *NewFn = cast<llvm::Function>(GetAddrOfFunction(GD, Ty)); 15551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1556bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // If this is an implementation of a function without a prototype, try to 1557bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // replace any existing uses of the function (which may be calls) with uses 1558bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner // of the new function 15599fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner if (D->getType()->isFunctionNoProtoType()) { 1560bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner ReplaceUsesOfNonProtoTypeWithRealFunction(OldFn, NewFn); 15619fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner OldFn->removeDeadConstantUsers(); 15629fa959d5bfbbb17d7c6ba71252219201fc8dc971Chris Lattner } 15631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 156462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 1565bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner if (!Entry->use_empty()) { 15661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *NewPtrForOldDecl = 15673c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 1568bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 1569bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner } 15701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 157162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 1572bdb0132722082886558f31eccdba06ae1852c0eeChris Lattner OldFn->eraseFromParent(); 15731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15740558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner Entry = NewFn; 1575bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 15761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1577112c967bd5c862a0f5d7913aa06700c048807db8John McCall // We need to set linkage and visibility on the function before 1578112c967bd5c862a0f5d7913aa06700c048807db8John McCall // generating code for it because various parts of IR generation 1579112c967bd5c862a0f5d7913aa06700c048807db8John McCall // want to propagate this information down (e.g. to local static 1580112c967bd5c862a0f5d7913aa06700c048807db8John McCall // declarations). 15810558e79840bfdbbd38c6e2b4f6765bf0158e85f4Chris Lattner llvm::Function *Fn = cast<llvm::Function>(Entry); 15828b2423361648c39a7d8a3c5e8129e12006deac32John McCall setFunctionLinkage(D, Fn); 1583bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1584112c967bd5c862a0f5d7913aa06700c048807db8John McCall // FIXME: this is redundant with part of SetFunctionDefinitionAttributes 15850ffeaad72cb335b926b064379be4c9886bbff004Anders Carlsson setGlobalVisibility(Fn, D); 1586112c967bd5c862a0f5d7913aa06700c048807db8John McCall 1587d26bc76c98006609002d9930f8840490e88ac5b5John McCall CodeGenFunction(*this).GenerateCode(D, Fn, FI); 15886379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 15897c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetFunctionDefinitionAttributes(D, Fn); 15907c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetLLVMFunctionAttributesForDefinition(D, Fn); 15911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 159240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) 1593219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 159440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) 1595219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 159677f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge if (D->hasAttr<AnnotateAttr>()) 159777f68bb90af93b95045fb994e7cd68137adcc132Julien Lerouge AddGlobalAnnotations(D, Fn); 1598bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 1599bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 1600f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCallvoid CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { 1601f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall const ValueDecl *D = cast<ValueDecl>(GD.getDecl()); 160240b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis const AliasAttr *AA = D->getAttr<AliasAttr>(); 1603bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner assert(AA && "Not an alias?"); 1604bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 16055f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef MangledName = getMangledName(GD); 1606f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1607f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // If there is a definition in the module, then it wins over the alias. 1608f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall // This is dubious, but allow it to be safe. Just ignore the alias. 1609f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall llvm::GlobalValue *Entry = GetGlobalValue(MangledName); 1610f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall if (Entry && !Entry->isDeclaration()) 1611f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall return; 16121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16132acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); 1614bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1615bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create a reference to the named value. This ensures that it is emitted 1616bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // if a deferred decl. 1617bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Constant *Aliasee; 1618bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (isa<llvm::FunctionType>(DeclTy)) 16191faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GlobalDecl(), 16201faa89f9c619e4b2411fab4af7e22ee7a2bd9009Anders Carlsson /*ForVTable=*/false); 1621bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner else 1622f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), 162396e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(DeclTy), 0); 1624bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 1625bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Create the new alias itself, but don't set a name yet. 16261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalValue *GA = 1627bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner new llvm::GlobalAlias(Aliasee->getType(), 1628bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner llvm::Function::ExternalLinkage, 1629bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner "", Aliasee, &getModule()); 16301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1631bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner if (Entry) { 1632f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall assert(Entry->isDeclaration()); 1633f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall 1634bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // If there is a declaration in the module, then we had an extern followed 1635bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // by the alias, as in: 1636bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // extern int test6(); 1637bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // ... 1638bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // int test6() __attribute__((alias("test7"))); 1639bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // 1640bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner // Remove it and replace uses of it with the alias. 1641f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall GA->takeName(Entry); 16421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16433c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, 1644bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->getType())); 1645bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner Entry->eraseFromParent(); 1646f746aa6a8f538be914173a4aef2d9a2fd9f99d17John McCall } else { 16479a20d55807cc2f6534a9c51a46cc8143ed16786dAnders Carlsson GA->setName(MangledName); 1648bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner } 16491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16507c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // Set attributes which are particular to an alias; this is a 16517c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // specialization of the attributes which may be set on a global 16527c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // variable/function. 165340b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (D->hasAttr<DLLExportAttr>()) { 16547c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 16557c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar // The dllexport attribute is ignored for undefined symbols. 165606a54a38be5054c910ffc92db60edab23f9ea105Argyrios Kyrtzidis if (FD->hasBody()) 16577c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 16587c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } else { 16597c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::DLLExportLinkage); 16607c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 16611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else if (D->hasAttr<WeakAttr>() || 166211e8ce7380856abee188b237c2600272df2ed09dRafael Espindola D->hasAttr<WeakRefAttr>() || 16630a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor D->isWeakImported()) { 16647c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar GA->setLinkage(llvm::Function::WeakAnyLinkage); 16657c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar } 16667c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar 16677c65e990e9f0dafaf9adbc59b766dcc23eaee845Daniel Dunbar SetCommonAttributes(D, GA); 1668bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner} 1669bd53271dc7570b54f7b7cab7b09bcf04c6e927f6Chris Lattner 16708dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID, 16712d3ba4f5a923a90c3fc290ddfba5e36c2d0a9b46Chris Lattner ArrayRef<llvm::Type*> Tys) { 1672df983a8bcbbcea911b8dce283f044787df119d50Jay Foad return llvm::Intrinsic::getDeclaration(&getModule(), (llvm::Intrinsic::ID)IID, 16738dd55a3c3b28d195717c87bbc60e765951d408feBenjamin Kramer Tys); 16747acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 1675bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 16761d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarstatic llvm::StringMapEntry<llvm::Constant*> & 16771d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarGetConstantCFStringEntry(llvm::StringMap<llvm::Constant*> &Map, 16781d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar const StringLiteral *Literal, 167970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar bool TargetIsLSB, 16801d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool &IsUTF16, 16811d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned &StringLength) { 16825f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef String = Literal->getString(); 16832f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer unsigned NumBytes = String.size(); 16841d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1685f015b034159d40e7033309e50036804eb1971787Daniel Dunbar // Check for simple case. 1686f015b034159d40e7033309e50036804eb1971787Daniel Dunbar if (!Literal->containsNonAsciiOrNull()) { 1687f015b034159d40e7033309e50036804eb1971787Daniel Dunbar StringLength = NumBytes; 16882f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer return Map.GetOrCreateValue(String); 1689f015b034159d40e7033309e50036804eb1971787Daniel Dunbar } 1690f015b034159d40e7033309e50036804eb1971787Daniel Dunbar 16911d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar // Otherwise, convert the UTF8 literals into a byte string. 16925f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<UTF16, 128> ToBuf(NumBytes); 16932f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer const UTF8 *FromPtr = (UTF8 *)String.data(); 16941d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar UTF16 *ToPtr = &ToBuf[0]; 16951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1696e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian (void)ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, 1697e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian &ToPtr, ToPtr + NumBytes, 1698e7ddfb974884ec75ffd66953b79511ea457493baFariborz Jahanian strictConversion); 16991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 170070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // ConvertUTF8toUTF16 returns the length in ToPtr. 17011d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar StringLength = ToPtr - &ToBuf[0]; 170270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 170370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // Render the UTF-16 string into a byte array and convert to the target byte 170470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // order. 170570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // 170670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar // FIXME: This isn't something we should need to do here. 170770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar llvm::SmallString<128> AsBytes; 170870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.reserve(StringLength * 2); 170970ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar for (unsigned i = 0; i != StringLength; ++i) { 171070ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar unsigned short Val = ToBuf[i]; 171170ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar if (TargetIsLSB) { 171270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 171370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 171470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } else { 171570ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val >> 8); 171670ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar AsBytes.push_back(Val & 0xFF); 171770ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 171870ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar } 1719434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // Append one extra null character, the second is automatically added by our 1720434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar // caller. 1721434da48d0e35764f18b3fc96c75504746050b046Daniel Dunbar AsBytes.push_back(0); 172270ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar 17231d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar IsUTF16 = true; 17245f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner return Map.GetOrCreateValue(StringRef(AsBytes.data(), AsBytes.size())); 17251d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar} 17261d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar 1727cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanianstatic llvm::StringMapEntry<llvm::Constant*> & 1728cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz JahanianGetConstantStringEntry(llvm::StringMap<llvm::Constant*> &Map, 1729cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian const StringLiteral *Literal, 1730cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian unsigned &StringLength) 1731cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian{ 17325f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef String = Literal->getString(); 1733cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian StringLength = String.size(); 1734cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian return Map.GetOrCreateValue(String); 1735cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian} 1736cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian 17371d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbarllvm::Constant * 17381d5529132e4620562cab931c1f84c24e42f02741Daniel DunbarCodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { 17391d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar unsigned StringLength = 0; 17401d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar bool isUTF16 = false; 17411d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar llvm::StringMapEntry<llvm::Constant*> &Entry = 17421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GetConstantCFStringEntry(CFConstantStringMap, Literal, 174370ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar getTargetData().isLittleEndian(), 174470ee975fad4653fa09f8e77f9a46a7b1f592ef59Daniel Dunbar isUTF16, StringLength); 17451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17461d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar if (llvm::Constant *C = Entry.getValue()) 17471d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar return C; 17481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17490032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *Zero = 17500032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 17513e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 17521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17539d4a15fd3b85434c43ea27562793de63a793321aChris Lattner // If we don't already have it, get __CFConstantStringClassReference. 1754c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 17552acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 175696e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson Ty = llvm::ArrayType::get(Ty, 0); 17571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *GV = CreateRuntimeVariable(Ty, 17589d4a15fd3b85434c43ea27562793de63a793321aChris Lattner "__CFConstantStringClassReference"); 17593e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 17603e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 1761a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad llvm::ConstantExpr::getGetElementPtr(GV, Zeros); 1762c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 17631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1764e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 17653e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 17662acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::StructType *STy = 1767e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1768e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 17695add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson std::vector<llvm::Constant*> Fields(4); 177044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1771c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 17725add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[0] = CFConstantStringClassRef; 17731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1774c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 17752acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 17761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Fields[1] = isUTF16 ? llvm::ConstantInt::get(Ty, 0x07d0) : 17775add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson llvm::ConstantInt::get(Ty, 0x07C8); 17785add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1779c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 17800032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 1781a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar 178295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner llvm::GlobalValue::LinkageTypes Linkage; 1783278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner bool isConstant; 1784a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 1785278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // FIXME: why do utf strings get "_" labels instead of "L" labels? 178695b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner Linkage = llvm::GlobalValue::InternalLinkage; 1787278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // Note: -fwritable-strings doesn't make unicode CFStrings writable, but 1788278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner // does make plain ascii ones writable. 1789278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = true; 1790a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } else { 1791584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // FIXME: With OS X ld 123.2 (xcode 4) and LTO we would get a linker error 1792584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // when using private linkage. It is not clear if this is a bug in ld 1793584acf2ded2c18a18d6da0e1c01f5859a384d99fRafael Espindola // or a reasonable new restriction. 1794dc0f137295bc7ec5b231ff1842388f149f43c0c8Rafael Espindola Linkage = llvm::GlobalValue::LinkerPrivateLinkage; 1795278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner isConstant = !Features.WritableStrings; 1796a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1797278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner 17981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable *GV = 1799278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 1800278b9f06933c385ffbccc15f8491787470cb4a1bChris Lattner ".str"); 1801b266a1fce09ab4ee7033268199509aacfbef056aRafael Espindola GV->setUnnamedAddr(true); 1802a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar if (isUTF16) { 18034da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy); 18044da244c23d6093adbbbc41654aa5c5111b38f431Ken Dyck GV->setAlignment(Align.getQuantity()); 1805f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar } else { 1806f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar CharUnits Align = getContext().getTypeAlignInChars(getContext().CharTy); 1807f7e903d7a30891083420c07ebeed281726a101d6Daniel Dunbar GV->setAlignment(Align.getQuantity()); 1808a9668e0b4c451a1021fe650c451b54dc98c2d18dDaniel Dunbar } 1809a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad Fields[2] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros); 18105add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson 1811c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 1812c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 18135add6835b0c6b0f67e19fd5366825d3e41eb0dcfAnders Carlsson Fields[3] = llvm::ConstantInt::get(Ty, StringLength); 18141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1815c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 181608e252425ca2cbdc44ba65d9a657ed5398014e36Owen Anderson C = llvm::ConstantStruct::get(STy, Fields); 18171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 18181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::GlobalVariable::PrivateLinkage, C, 181995b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner "_unnamed_cfstring_"); 1820bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor if (const char *Sect = getContext().getTargetInfo().getCFStringSection()) 18218e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar GV->setSection(Sect); 18221d5529132e4620562cab931c1f84c24e42f02741Daniel Dunbar Entry.setValue(GV); 18231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18240c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1825c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 182645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 182745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregorstatic RecordDecl * 182845c4ea75b235de94f44bf96843624e6a559e4c00Douglas GregorCreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 182945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor DeclContext *DC, IdentifierInfo *Id) { 183045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor SourceLocation Loc; 183145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor if (Ctx.getLangOptions().CPlusPlus) 183245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 183345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor else 183445c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 183545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor} 183645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 183733e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanianllvm::Constant * 18384c73307c74764ba99e1379677fe92af72f676531Fariborz JahanianCodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) { 18392bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian unsigned StringLength = 0; 18402bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::StringMapEntry<llvm::Constant*> &Entry = 1841cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian GetConstantStringEntry(CFConstantStringMap, Literal, StringLength); 18422bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18432bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian if (llvm::Constant *C = Entry.getValue()) 18442bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return C; 18452bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 18462bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zero = 18472bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant::getNullValue(llvm::Type::getInt32Ty(VMContext)); 18482bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *Zeros[] = { Zero, Zero }; 18492bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 1850ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian // If we don't already have it, get _NSConstantStringClassReference. 18514c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian if (!ConstantStringClassRef) { 18524c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian std::string StringClass(getLangOptions().ObjCConstantStringClass); 18532acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 18544c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian llvm::Constant *GV; 18556f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian if (Features.ObjCNonFragileABI) { 185625dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian std::string str = 185725dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian StringClass.empty() ? "OBJC_CLASS_$_NSConstantString" 185825dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian : "OBJC_CLASS_$_" + StringClass; 18596f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian GV = getObjCRuntime().GetClassGlobal(str); 18606f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian // Make sure the result is of the correct type. 18612acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 18626f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian ConstantStringClassRef = 18636f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian llvm::ConstantExpr::getBitCast(GV, PTy); 18646f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian } else { 186525dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian std::string str = 186625dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian StringClass.empty() ? "_NSConstantStringClassReference" 186725dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian : "_" + StringClass + "ClassReference"; 18682acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *PTy = llvm::ArrayType::get(Ty, 0); 186925dba5d294364fa8339091e4d9e6a8f5db008377Fariborz Jahanian GV = CreateRuntimeVariable(PTy, str); 18706f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian // Decay array -> ptr 18716f40e2244b0590f144c5ceee07981a962fbbc72eFariborz Jahanian ConstantStringClassRef = 1872a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad llvm::ConstantExpr::getGetElementPtr(GV, Zeros); 18734c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian } 18742bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian } 187545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 187645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor if (!NSConstantStringType) { 187745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // Construct the type for a constant NSString. 187845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor RecordDecl *D = CreateRecordDecl(Context, TTK_Struct, 187945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor Context.getTranslationUnitDecl(), 188045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor &Context.Idents.get("__builtin_NSString")); 188145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor D->startDefinition(); 188245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 188345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor QualType FieldTypes[3]; 188445c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 188545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // const int *isa; 188645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldTypes[0] = Context.getPointerType(Context.IntTy.withConst()); 188745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // const char *str; 188845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldTypes[1] = Context.getPointerType(Context.CharTy.withConst()); 188945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // unsigned int length; 189045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldTypes[2] = Context.UnsignedIntTy; 189145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 189245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor // Create fields 189345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor for (unsigned i = 0; i < 3; ++i) { 189445c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldDecl *Field = FieldDecl::Create(Context, D, 189545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor SourceLocation(), 189645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor SourceLocation(), 0, 189745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor FieldTypes[i], /*TInfo=*/0, 189845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor /*BitWidth=*/0, 189945c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor /*Mutable=*/false, 190045c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor /*HasInit=*/false); 190145c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor Field->setAccess(AS_public); 190245c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor D->addDecl(Field); 190345c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor } 190445c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor 190545c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor D->completeDefinition(); 190645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor QualType NSTy = Context.getTagDeclType(D); 190745c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor NSConstantStringType = cast<llvm::StructType>(getTypes().ConvertType(NSTy)); 190845c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor } 19092bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19102bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian std::vector<llvm::Constant*> Fields(3); 19112bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19122bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // Class pointer. 19134c73307c74764ba99e1379677fe92af72f676531Fariborz Jahanian Fields[0] = ConstantStringClassRef; 19142bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19152bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String pointer. 19162bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::Constant *C = llvm::ConstantArray::get(VMContext, Entry.getKey().str()); 19172bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19182bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalValue::LinkageTypes Linkage; 19192bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian bool isConstant; 1920cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian Linkage = llvm::GlobalValue::PrivateLinkage; 1921cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian isConstant = !Features.WritableStrings; 19222bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19232bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable *GV = 19242bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C, 19252bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian ".str"); 1926803d307a5385059b1a84dfe9706ab158c80a20dcRafael Espindola GV->setUnnamedAddr(true); 1927cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian CharUnits Align = getContext().getTypeAlignInChars(getContext().CharTy); 1928cf8e168baf75b7ede6493d0373d64545c29c1a90Fariborz Jahanian GV->setAlignment(Align.getQuantity()); 1929a5c04344fa70d6eec34344760c1fe511e16f2d76Jay Foad Fields[1] = llvm::ConstantExpr::getGetElementPtr(GV, Zeros); 19302bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19312bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // String length. 19322acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 19332bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Fields[2] = llvm::ConstantInt::get(Ty, StringLength); 19342bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19352bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // The struct. 193645c4ea75b235de94f44bf96843624e6a559e4c00Douglas Gregor C = llvm::ConstantStruct::get(NSConstantStringType, Fields); 19372bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV = new llvm::GlobalVariable(getModule(), C->getType(), true, 19382bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian llvm::GlobalVariable::PrivateLinkage, C, 19392bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian "_unnamed_nsstring_"); 19402bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian // FIXME. Fix section. 1941ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian if (const char *Sect = 1942ec951e0c2fc0db00c36bc60c900331dde32c1b43Fariborz Jahanian Features.ObjCNonFragileABI 1943bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor ? getContext().getTargetInfo().getNSStringNonFragileABISection() 1944bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor : getContext().getTargetInfo().getNSStringSection()) 19452bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian GV->setSection(Sect); 19462bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian Entry.setValue(GV); 19472bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian 19482bb5ddaff86ee73d2cea7ec1835978afc88a83f0Fariborz Jahanian return GV; 194933e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian} 195033e982bf782d851bfe5767acb1336fcf3419ac6bFariborz Jahanian 19510815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas GregorQualType CodeGenModule::getObjCFastEnumerationStateType() { 19520815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor if (ObjCFastEnumerationStateType.isNull()) { 19530815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor RecordDecl *D = CreateRecordDecl(Context, TTK_Struct, 19540815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.getTranslationUnitDecl(), 19550815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor &Context.Idents.get("__objcFastEnumerationState")); 19560815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor D->startDefinition(); 19570815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 19580815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor QualType FieldTypes[] = { 19590815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.UnsignedLongTy, 19600815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.getPointerType(Context.getObjCIdType()), 19610815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.getPointerType(Context.UnsignedLongTy), 19620815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Context.getConstantArrayType(Context.UnsignedLongTy, 19630815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor llvm::APInt(32, 5), ArrayType::Normal, 0) 19640815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor }; 19650815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 19660815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor for (size_t i = 0; i < 4; ++i) { 19670815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor FieldDecl *Field = FieldDecl::Create(Context, 19680815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor D, 19690815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor SourceLocation(), 19700815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor SourceLocation(), 0, 19710815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor FieldTypes[i], /*TInfo=*/0, 19720815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor /*BitWidth=*/0, 19730815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor /*Mutable=*/false, 19740815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor /*HasInit=*/false); 19750815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor Field->setAccess(AS_public); 19760815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor D->addDecl(Field); 19770815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor } 19780815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 19790815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor D->completeDefinition(); 19800815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor ObjCFastEnumerationStateType = Context.getTagDeclType(D); 19810815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor } 19820815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 19830815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor return ObjCFastEnumerationStateType; 19840815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor} 19850815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor 19866143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 19871e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 19886143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 19893b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck const ASTContext &Context = getContext(); 19901e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 19913b8037a8c6f462e51f75c82b3d7fe1b8dbcf06c0Ken Dyck Context.getAsConstantArrayType(E->getType()); 19921e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 19931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1994dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 19951e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 19961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19975cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor switch (E->getKind()) { 19985cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case StringLiteral::Ascii: 19995cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case StringLiteral::UTF8: 20005cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor break; 20015cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case StringLiteral::Wide: 2002bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor RealLen *= Context.getTargetInfo().getWCharWidth() / Context.getCharWidth(); 20035cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor break; 20045cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case StringLiteral::UTF16: 2005bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor RealLen *= Context.getTargetInfo().getChar16Width() / Context.getCharWidth(); 20065cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor break; 20075cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case StringLiteral::UTF32: 2008bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor RealLen *= Context.getTargetInfo().getChar32Width() / Context.getCharWidth(); 20095cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor break; 20105cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } 20111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20122f4eaef37476ae6891ede8ba215d0f6fd093629bBenjamin Kramer std::string Str = E->getString().str(); 20131e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 20141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20151e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 20161e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 20171e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 20186143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 20196143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 20206143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 20216143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 20226143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 20237eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman // FIXME: We shouldn't need to bitcast the constant in the wide string case. 2024a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall CharUnits Align = getContext().getTypeAlignInChars(S->getType()); 2025a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall llvm::Constant *C = GetAddrOfConstantString(GetStringForStringLiteral(S), 2026a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall /* GlobalName */ 0, 2027a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall Align.getQuantity()); 20285cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (S->isWide() || S->isUTF16() || S->isUTF32()) { 20297eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::Type *DestTy = 20307eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman llvm::PointerType::getUnqual(getTypes().ConvertType(S->getType())); 20317eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman C = llvm::ConstantExpr::getBitCast(C, DestTy); 20327eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman } 20337eb79c1010c8d30b852768bec96e81cd3e6def2eEli Friedman return C; 20346143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 20356143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 2036eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 2037eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 2038eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 2039eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 2040eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 2041eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 2042a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 2043a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 2044eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 2045eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 2046eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 2047a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 2048a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCallstatic llvm::GlobalVariable *GenerateStringLiteral(StringRef str, 204945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 20505fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 2051a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall const char *GlobalName, 2052a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall unsigned Alignment) { 20536143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 20540032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Constant *C = 20550032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantArray::get(CGM.getLLVMContext(), str, false); 20561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 205745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 20581257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalVariable *GV = 20591257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant, 20601257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola llvm::GlobalValue::PrivateLinkage, 20611257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola C, GlobalName); 2062a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall GV->setAlignment(Alignment); 20631257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola GV->setUnnamedAddr(true); 20641257bc6ee76b931e3f8e51a88298b95379963d24Rafael Espindola return GV; 206545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 206645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 20676143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 20686143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 20696143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 20706143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 20716143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 20726143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 20736143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 20746143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 20755f9e272e632e951b1efe824cd16acb4d96077930Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfConstantString(StringRef Str, 2076a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall const char *GlobalName, 2077a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall unsigned Alignment) { 20788e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar bool IsConstant = !Features.WritableStrings; 20798e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 20808e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Get the default prefix if a name wasn't specified. 20818e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!GlobalName) 208295b851e55c328af4b69da7bfc1124bf258c0ffe5Chris Lattner GlobalName = ".str"; 20838e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar 20848e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar // Don't share any string literals if strings aren't constant. 20858e5c2b8072f4409c7c0004331d1db9652d5209c0Daniel Dunbar if (!IsConstant) 2086a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall return GenerateStringLiteral(Str, false, *this, GlobalName, Alignment); 20871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2088a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall llvm::StringMapEntry<llvm::GlobalVariable *> &Entry = 20899de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer ConstantStringMap.GetOrCreateValue(Str); 209045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 2091a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall if (llvm::GlobalVariable *GV = Entry.getValue()) { 2092a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall if (Alignment > GV->getAlignment()) { 2093a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall GV->setAlignment(Alignment); 2094a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall } 2095a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall return GV; 2096a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall } 209745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 209845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 2099a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall llvm::GlobalVariable *GV = GenerateStringLiteral(Str, true, *this, GlobalName, Alignment); 2100a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall Entry.setValue(GV); 2101a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall return GV; 210245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 21036143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 21046143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 21059de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramer/// array containing the literal and a terminating '\0' 21066143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 21079de4342ef79a18c706e46bc23f8f579f5add2375Benjamin Kramerllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &Str, 2108a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall const char *GlobalName, 2109a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall unsigned Alignment) { 21105f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef StrWithNull(Str.c_str(), Str.size() + 1); 2111a5e19c6b2554f6d9c4b9850d4dbbbfa3643282e5John McCall return GetAddrOfConstantString(StrWithNull, GlobalName, Alignment); 21126143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 211341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 2114af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 2115af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 21161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenModule::EmitObjCPropertyImplementations(const 2117af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 21181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (ObjCImplementationDecl::propimpl_iterator 211917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { 2120af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 21211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2122af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 2123af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 2124af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 2125af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 2126af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 2127af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 2128af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 2129af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 2130af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 213117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis if (!D->getInstanceMethod(PD->getGetterName())) 2132fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 2133fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 2134af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 213517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis !D->getInstanceMethod(PD->getSetterName())) 2136fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 2137fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 2138af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 2139af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 2140af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 2141af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 2142e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCallstatic bool needsDestructMethod(ObjCImplementationDecl *impl) { 2143db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose const ObjCInterfaceDecl *iface = impl->getClassInterface(); 2144db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose for (const ObjCIvarDecl *ivar = iface->all_declared_ivar_begin(); 2145e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ivar; ivar = ivar->getNextIvar()) 2146e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall if (ivar->getType().isDestructedType()) 2147e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall return true; 2148e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 2149e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall return false; 2150e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall} 2151e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 2152109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// EmitObjCIvarInitializations - Emit information for ivar initialization 2153109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian/// for an implementation. 2154109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanianvoid CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { 2155e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // We might need a .cxx_destruct even if we don't have any ivar initializers. 2156e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall if (needsDestructMethod(D)) { 2157e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); 2158e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 2159e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCMethodDecl *DTORMethod = 2160e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCMethodDecl::Create(getContext(), D->getLocation(), D->getLocation(), 216175cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis cxxSelector, getContext().VoidTy, 0, D, 216275cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isInstance=*/true, /*isVariadic=*/false, 216375cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isSynthesized=*/true, /*isImplicitlyDeclared=*/true, 216475cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isDefined=*/false, ObjCMethodDecl::Required); 2165e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall D->addInstanceMethod(DTORMethod); 2166e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); 2167f85e193739c953358c865005855253af4f68a497John McCall D->setHasCXXStructors(true); 2168e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall } 2169e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 2170e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // If the implementation doesn't have any ivar initializers, we don't need 2171e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // a .cxx_construct. 2172827bbcc8a9115782693b21030a45378abe5c1862David Chisnall if (D->getNumIvarInitializers() == 0) 2173109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian return; 2174109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 2175e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall IdentifierInfo *II = &getContext().Idents.get(".cxx_construct"); 2176e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall Selector cxxSelector = getContext().Selectors.getSelector(0, &II); 2177109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian // The constructor returns 'self'. 2178109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create(getContext(), 2179109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->getLocation(), 218011d77169555480ee0a04c6e5bc390d8fde41175dArgyrios Kyrtzidis D->getLocation(), 218111d77169555480ee0a04c6e5bc390d8fde41175dArgyrios Kyrtzidis cxxSelector, 2182109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian getContext().getObjCIdType(), 0, 218375cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis D, /*isInstance=*/true, 218475cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isVariadic=*/false, 218575cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isSynthesized=*/true, 218675cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isImplicitlyDeclared=*/true, 218775cf3e86d33ce810c12084126385371b335c30baArgyrios Kyrtzidis /*isDefined=*/false, 2188109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl::Required); 2189109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian D->addInstanceMethod(CTORMethod); 2190109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); 2191f85e193739c953358c865005855253af4f68a497John McCall D->setHasCXXStructors(true); 2192109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian} 2193109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 219491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson/// EmitNamespace - Emit all declarations in a namespace. 2195984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlssonvoid CodeGenModule::EmitNamespace(const NamespaceDecl *ND) { 219617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = ND->decls_begin(), E = ND->decls_end(); 2197984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson I != E; ++I) 2198984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitTopLevelDecl(*I); 2199984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson} 2200984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson 220191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson// EmitLinkageSpec - Emit all declarations in a linkage spec. 220291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlssonvoid CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { 2203f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman if (LSD->getLanguage() != LinkageSpecDecl::lang_c && 2204f976be8a63f9e0d3bd50e33dadef02c3c9921747Eli Friedman LSD->getLanguage() != LinkageSpecDecl::lang_cxx) { 220591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson ErrorUnsupported(LSD, "linkage spec"); 220691e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson return; 220791e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson } 220891e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 220917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end(); 221091e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson I != E; ++I) 221191e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitTopLevelDecl(*I); 221291e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson} 221391e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson 221441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 221541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 221641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 221741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 221841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 221941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 222041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 222141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 222216e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Ignore dependent declarations. 222316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor if (D->getDeclContext() && D->getDeclContext()->isDependentContext()) 222416e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 22251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 222641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 2227293361afd4199c92aabff9267fddea890943c586Anders Carlsson case Decl::CXXConversion: 22282b77ba8bc7a842829ad9193816dc1d7d5e9c5be6Anders Carlsson case Decl::CXXMethod: 222941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 223016e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor // Skip function templates 22318387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() || 22328387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet cast<FunctionDecl>(D)->isLateTemplateParsed()) 223316e8be2ac532358d4e413fdfa2643b1876edda78Douglas Gregor return; 22341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2235555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<FunctionDecl>(D)); 2236555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson break; 2237555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson 223841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 2239555b4bb2749aea2ec8e2adc351a71ec1cb9bdc33Anders Carlsson EmitGlobal(cast<VarDecl>(D)); 224041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 224141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 224226fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall // Indirect fields from global anonymous structs and unions can be 224326fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall // ignored; only the actual variable requires IR gen support. 224426fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall case Decl::IndirectField: 224526fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall break; 224626fbc72b33bdbd20b0145bf117c64d373f8051e3John McCall 224795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // C++ Decls 224841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 2249984e06874685396ca2cb51f0008cfff7c9b3d9c6Anders Carlsson EmitNamespace(cast<NamespaceDecl>(D)); 225041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 22519cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor // No code generation needed. 22529d0c6613ec040ad8d952556be909232a7f25dedeJohn McCall case Decl::UsingShadow: 22539cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor case Decl::Using: 2254dd9967a6374c9a44be4af02aaeee340ffb82848fDouglas Gregor case Decl::UsingDirective: 2255127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::ClassTemplate: 2256127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor case Decl::FunctionTemplate: 22573e4c6c4c79a03f5cb0c4671d7c282d623c6dc35eRichard Smith case Decl::TypeAliasTemplate: 2258018837b081bd1a725bae1c020eb1649975b04d67Anders Carlsson case Decl::NamespaceAlias: 22596a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor case Decl::Block: 22609cfbe48a7a20a217fdb2920b29b67ae7941cb116Douglas Gregor break; 226195d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson case Decl::CXXConstructor: 22621fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson // Skip function templates 22638387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() || 22648387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet cast<FunctionDecl>(D)->isLateTemplateParsed()) 22651fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson return; 22661fe598c026dc03fddbd65efb8119eb1afd9b1520Anders Carlsson 226795d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson EmitCXXConstructors(cast<CXXConstructorDecl>(D)); 226895d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson break; 226927ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson case Decl::CXXDestructor: 22708387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet if (cast<FunctionDecl>(D)->isLateTemplateParsed()) 22718387e2a41eef6fa17fb140a18c29b6eee9dd2b8aFrancois Pichet return; 227227ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson EmitCXXDestructors(cast<CXXDestructorDecl>(D)); 227327ae53665f8b00fe4ba21da0fa79a4ce6e0b6cd5Anders Carlsson break; 227436674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 227536674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson case Decl::StaticAssert: 227636674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson // Nothing to do. 227736674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson break; 227836674d2978eb53962218ac67bb4d352cc287ea05Anders Carlsson 227995d4e5d2f87a0f07fb143ccb824dfc4c5c595c78Anders Carlsson // Objective-C Decls 22801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 228138e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 228241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 228341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 2284b31cb7f1752ea011fd06ac9574ce24667d11cbdbFariborz Jahanian case Decl::ObjCInterface: 228541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 2286000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian 2287baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner case Decl::ObjCCategory: { 2288baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D); 2289baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner if (CD->IsClassExtension() && CD->hasSynthBitfield()) 2290baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner Context.ResetObjCLayout(CD->getClassInterface()); 2291baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner break; 2292baf101d1f96b4e41c9f2797875329840514f54f1Chris Lattner } 2293285d0dba947b7c9960eaa88e8c4fced0398d4319Chris Lattner 229441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 2295e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 229641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 229741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 229841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 2299af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 2300af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 2301e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 230241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 230341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 2304af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 2305af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 2306000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian if (Features.ObjCNonFragileABI2 && OMD->hasSynthBitfield()) 2307000835d0b04345c0014c603fe6339b3bc154050eFariborz Jahanian Context.ResetObjCLayout(OMD->getClassInterface()); 2308af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 2309109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian EmitObjCIvarInitializations(OMD); 2310e926523105dd2604ccd5c101605dea43c5269965Peter Collingbourne ObjCRuntime->GenerateClass(OMD); 231141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 23121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 231341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 231441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 231541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 23166fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis if (OMD->getBody()) 231741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 231841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 231941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 23201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Decl::ObjCCompatibleAlias: 2321305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 232241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 232341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 232491e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson case Decl::LinkageSpec: 232591e20dd8bf1bc8980ee93839383d2bd170bce050Anders Carlsson EmitLinkageSpec(cast<LinkageSpecDecl>(D)); 232641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 232741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 232841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 232941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 23305f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef AsmString = AD->getAsmString()->getString(); 23311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 233241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 233341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 233441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 23359f5bff086cad25c15b4deb8a7763786097aadccdChris Lattner else if (*--S.end() == '\n') 23369f5bff086cad25c15b4deb8a7763786097aadccdChris Lattner getModule().setModuleInlineAsm(S + AsmString.str()); 233741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 23388d04258483be6583f0865464234d014807a3e1ccBenjamin Kramer getModule().setModuleInlineAsm(S + '\n' + AsmString.str()); 233941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 234041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 23411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 23421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump default: 2343f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // Make sure we handled everything we should, every other kind is a 2344f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind 2345f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // function. Need to recode Decl::Kind to do that easily. 234641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 234741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 234841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 2349744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2350744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Turns the given pointer into a constant. 2351744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, 2352744016dde06fcffd50931e94a98c850f8b12cd87John McCall const void *Ptr) { 2353744016dde06fcffd50931e94a98c850f8b12cd87John McCall uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); 23542acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *i64 = llvm::Type::getInt64Ty(Context); 2355744016dde06fcffd50931e94a98c850f8b12cd87John McCall return llvm::ConstantInt::get(i64, PtrInt); 2356744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2357744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2358744016dde06fcffd50931e94a98c850f8b12cd87John McCallstatic void EmitGlobalDeclMetadata(CodeGenModule &CGM, 2359744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *&GlobalMetadata, 2360744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl D, 2361744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr) { 2362744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (!GlobalMetadata) 2363744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalMetadata = 2364744016dde06fcffd50931e94a98c850f8b12cd87John McCall CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); 2365744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2366744016dde06fcffd50931e94a98c850f8b12cd87John McCall // TODO: should we report variant information for ctors/dtors? 2367744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Ops[] = { 2368744016dde06fcffd50931e94a98c850f8b12cd87John McCall Addr, 2369744016dde06fcffd50931e94a98c850f8b12cd87John McCall GetPointerConstant(CGM.getLLVMContext(), D.getDecl()) 2370744016dde06fcffd50931e94a98c850f8b12cd87John McCall }; 23716f141659cab11109d9931d92d0988f8850778de3Jay Foad GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops)); 2372744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2373744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2374744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes associating all the global values in the 2375744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// current module with the Decls they came from. This is useful for 2376744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// projects using IR gen as a subroutine. 2377744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// 2378744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Since there's currently no way to associate an MDNode directly 2379744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with an llvm::GlobalValue, we create a global named metadata 2380744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// with the name 'clang.global.decl.ptrs'. 2381744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenModule::EmitDeclMetadata() { 2382744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2383744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2384744016dde06fcffd50931e94a98c850f8b12cd87John McCall // StaticLocalDeclMap 23855f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner for (llvm::DenseMap<GlobalDecl,StringRef>::iterator 2386744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = MangledDeclNames.begin(), E = MangledDeclNames.end(); 2387744016dde06fcffd50931e94a98c850f8b12cd87John McCall I != E; ++I) { 2388744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::GlobalValue *Addr = getModule().getNamedValue(I->second); 2389744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(*this, GlobalMetadata, I->first, Addr); 2390744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2391744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2392744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2393744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// Emits metadata nodes for all the local variables in the current 2394744016dde06fcffd50931e94a98c850f8b12cd87John McCall/// function. 2395744016dde06fcffd50931e94a98c850f8b12cd87John McCallvoid CodeGenFunction::EmitDeclMetadata() { 2396744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (LocalDeclMap.empty()) return; 2397744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2398744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::LLVMContext &Context = getLLVMContext(); 2399744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2400744016dde06fcffd50931e94a98c850f8b12cd87John McCall // Find the unique metadata ID for this name. 2401744016dde06fcffd50931e94a98c850f8b12cd87John McCall unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); 2402744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2403744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::NamedMDNode *GlobalMetadata = 0; 2404744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2405744016dde06fcffd50931e94a98c850f8b12cd87John McCall for (llvm::DenseMap<const Decl*, llvm::Value*>::iterator 2406744016dde06fcffd50931e94a98c850f8b12cd87John McCall I = LocalDeclMap.begin(), E = LocalDeclMap.end(); I != E; ++I) { 2407744016dde06fcffd50931e94a98c850f8b12cd87John McCall const Decl *D = I->first; 2408744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *Addr = I->second; 2409744016dde06fcffd50931e94a98c850f8b12cd87John McCall 2410744016dde06fcffd50931e94a98c850f8b12cd87John McCall if (llvm::AllocaInst *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { 2411744016dde06fcffd50931e94a98c850f8b12cd87John McCall llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); 24126f141659cab11109d9931d92d0988f8850778de3Jay Foad Alloca->setMetadata(DeclPtrKind, llvm::MDNode::get(Context, DAddr)); 2413744016dde06fcffd50931e94a98c850f8b12cd87John McCall } else if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr)) { 2414744016dde06fcffd50931e94a98c850f8b12cd87John McCall GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); 2415744016dde06fcffd50931e94a98c850f8b12cd87John McCall EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); 2416744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2417744016dde06fcffd50931e94a98c850f8b12cd87John McCall } 2418744016dde06fcffd50931e94a98c850f8b12cd87John McCall} 2419673431a2986f750b4d8fadb57abf3f00db27bbbdDaniel Dunbar 24203dc05418538c719fea48b906bfa4febe5296e126Nick Lewyckyvoid CodeGenModule::EmitCoverageFile() { 24213dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky if (!getCodeGenOpts().CoverageFile.empty()) { 24225ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky if (llvm::NamedMDNode *CUNode = TheModule.getNamedMetadata("llvm.dbg.cu")) { 24235ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::NamedMDNode *GCov = TheModule.getOrInsertNamedMetadata("llvm.gcov"); 24245ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::LLVMContext &Ctx = TheModule.getContext(); 24253dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::MDString *CoverageFile = 24263dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::MDString::get(Ctx, getCodeGenOpts().CoverageFile); 24275ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky for (int i = 0, e = CUNode->getNumOperands(); i != e; ++i) { 24285ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::MDNode *CU = CUNode->getOperand(i); 24293dc05418538c719fea48b906bfa4febe5296e126Nick Lewycky llvm::Value *node[] = { CoverageFile, CU }; 24305ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky llvm::MDNode *N = llvm::MDNode::get(Ctx, node); 24315ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky GCov->addOperand(N); 24325ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 24335ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 24345ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky } 24355ea4f44e34449a78d6b38aa47c14b527839d7aacNick Lewycky} 2436