CodeGenModule.cpp revision 62b33ea51adbd0e7f2f05983e9e4a3a2b2ed26de
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 14e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta#include "CGDebugInfo.h" 155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenModule.h" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenFunction.h" 170dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar#include "CGCall.h" 18af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar#include "CGObjCRuntime.h" 195f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor#include "Mangle.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 21c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2221ef7ae45c8b91f23cf5eab2263421bb398a644bChris Lattner#include "clang/AST/DeclCXX.h" 232c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner#include "clang/Basic/Diagnostic.h" 248bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman#include "clang/Basic/SourceManager.h" 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 26ec9426ca6039279bcc99bc2c625bb2abe4f0353dNate Begeman#include "llvm/CallingConv.h" 27bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner#include "llvm/Module.h" 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/Intrinsics.h" 2920ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris LattnerCodeGenModule::CodeGenModule(ASTContext &C, const LangOptions &LO, 35fb97b03e42d397405f617be0252be83e77a66f6eChris Lattner llvm::Module &M, const llvm::TargetData &TD, 36f77ac86f4eca528a04b817d7ad7f045a47d52712Daniel Dunbar Diagnostic &diags, bool GenerateDebugInfo) 3790a904309c79977fcba2ff0542e2e4cd8e3c3fafMike Stump : BlockModule(C, M, TD, Types, *this), Context(C), Features(LO), TheModule(M), 382a998148a6823c44d67da347c95eb2ea21f6b986Mike Stump TheTargetData(TD), Diags(diags), Types(C, M, TD), Runtime(0), 392a998148a6823c44d67da347c95eb2ea21f6b986Mike Stump MemCpyFn(0), MemMoveFn(0), MemSetFn(0), CFConstantStringClassRef(0) { 40208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar 413c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner if (!Features.ObjC1) 423c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = 0; 433c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (!Features.NeXTRuntime) 443c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateGNUObjCRuntime(*this); 453c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else if (Features.ObjCNonFragileABI) 463c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacNonFragileABIObjCRuntime(*this); 473c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner else 483c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner Runtime = CreateMacObjCRuntime(*this); 49e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 50e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 5126efc3388adb010984da2f70e1f24e8286e6476dMike Stump DebugInfo = GenerateDebugInfo ? new CGDebugInfo(this) : 0; 522b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 532b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 542b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 55815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 56815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 57815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 58815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 59815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 600269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitDeferred(); 61219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar EmitAliases(); 62208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 63208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 64208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 656bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 666bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 67532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 680269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar EmitLLVMUsed(); 69b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar BindRuntimeGlobals(); 702b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 72b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbarvoid CodeGenModule::BindRuntimeGlobals() { 73f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar // Deal with protecting runtime function names. 74b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar for (unsigned i = 0, e = RuntimeGlobals.size(); i < e; ++i) { 75b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar llvm::GlobalValue *GV = RuntimeGlobals[i].first; 76b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar const std::string &Name = RuntimeGlobals[i].second; 77f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 78b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar // Discard unused runtime declarations. 79b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar if (GV->isDeclaration() && GV->use_empty()) { 80b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar GV->eraseFromParent(); 810293d540baafbe070c1035611787a81001a4118eDaniel Dunbar continue; 820293d540baafbe070c1035611787a81001a4118eDaniel Dunbar } 830293d540baafbe070c1035611787a81001a4118eDaniel Dunbar 84e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner // See if there is a conflict against a function by setting the name and 85e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner // seeing if we got the desired name. 86e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner GV->setName(Name); 87e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner if (GV->isName(Name.c_str())) 88e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner continue; // Yep, it worked! 89e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner 90e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner GV->setName(""); // Zap the bogus name until we work out the conflict. 91b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar llvm::GlobalValue *Conflict = TheModule.getNamedValue(Name); 92e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner assert(Conflict && "Must have conflicted!"); 93e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner 94e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner // Decide which version to take. If the conflict is a definition 95e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner // we are forced to take that, otherwise assume the runtime 96e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner // knows best. 97b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar 98e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner // FIXME: This will fail phenomenally when the conflict is the 99e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner // wrong type of value. Just bail on it for now. This should 100e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner // really reuse something inside the LLVM Linker code. 101e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner assert(GV->getValueID() == Conflict->getValueID() && 102e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner "Unable to resolve conflict between globals of different types."); 103e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner if (!Conflict->isDeclaration()) { 104e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner llvm::Value *Casted = 105e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner llvm::ConstantExpr::getBitCast(Conflict, GV->getType()); 106e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner GV->replaceAllUsesWith(Casted); 107e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner GV->eraseFromParent(); 108e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner } else { 109e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner GV->takeName(Conflict); 110e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner llvm::Value *Casted = 111e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner llvm::ConstantExpr::getBitCast(GV, Conflict->getType()); 112e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner Conflict->replaceAllUsesWith(Casted); 113e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner Conflict->eraseFromParent(); 114e21c4b829c9e69c20f4baab4916e05cdb786d9aeChris Lattner } 115f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar } 116f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 117f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 118488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 1192c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 12090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 12190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 12290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 12390df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 124488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 12556b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 1262c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 1270a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID) 1280a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner << Msg << S->getSourceRange(); 1292c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 13058c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 131488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 132c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 13390df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 13490df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 13590df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 13690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 137488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 13856b8001b42bd603ef593e3cb278d8b9b9ba26ca9Daniel Dunbar "cannot compile this %0 yet"); 139c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 1400a14eee528a901c16f0e288fbc10a3abc1660d87Chris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; 141c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 142c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 14341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// setGlobalVisibility - Set the visibility for the given LLVM 14441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// GlobalValue according to the given clang AST visibility value. 14541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarstatic void setGlobalVisibility(llvm::GlobalValue *GV, 14641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar VisibilityAttr::VisibilityTypes Vis) { 1474f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman switch (Vis) { 1484f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman default: assert(0 && "Unknown visibility!"); 1494f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman case VisibilityAttr::DefaultVisibility: 1504f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 1514f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman break; 1524f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman case VisibilityAttr::HiddenVisibility: 1534f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 1544f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman break; 1554f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman case VisibilityAttr::ProtectedVisibility: 1564f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); 1574f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman break; 1584f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman } 1594f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman} 1604f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman 1615f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// \brief Retrieves the mangled name for the given declaration. 1625f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1635f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// If the given declaration requires a mangled name, returns an 164c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// const char* containing the mangled name. Otherwise, returns 165c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner/// the unmangled name. 1665f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1675f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// FIXME: Returning an IdentifierInfo* here is a total hack. We 1685f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// really need some kind of string abstraction that either stores a 1695f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// mangled name or stores an IdentifierInfo*. This will require 170b5da3e94b72a0106abd69c2a84bf650e773fa4acDaniel Dunbar/// changes to the GlobalDeclMap, too. (I disagree, I think what we 171b5da3e94b72a0106abd69c2a84bf650e773fa4acDaniel Dunbar/// actually need is for Sema to provide some notion of which Decls 172b5da3e94b72a0106abd69c2a84bf650e773fa4acDaniel Dunbar/// refer to the same semantic decl. We shouldn't need to mangle the 173b5da3e94b72a0106abd69c2a84bf650e773fa4acDaniel Dunbar/// names and see what comes out the same to figure this out. - DWD) 1745f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// 1755f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// FIXME: Performance here is going to be terribly until we start 1765f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// caching mangled names. However, we should fix the problem above 1775f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor/// first. 1786ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregorconst char *CodeGenModule::getMangledName(const NamedDecl *ND) { 179c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner // In C, functions with no attributes never need to be mangled. Fastpath them. 180c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner if (!getLangOptions().CPlusPlus && !ND->hasAttrs()) { 181c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); 1823c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return ND->getNameAsCString(); 183c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner } 184c50689bd1e8788a7fc8f19070b7505ff95034979Chris Lattner 1856ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor llvm::SmallString<256> Name; 1866ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor llvm::raw_svector_ostream Out(Name); 187fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar if (!mangleName(ND, Context, Out)) { 188fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar assert(ND->getIdentifier() && "Attempt to mangle unnamed decl."); 1893c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return ND->getNameAsCString(); 190fe345572459b69a6b680322fef504b4f8bd98dd7Daniel Dunbar } 1915f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 1926ec3668a2608b63473207319f5ceff9bbd22ea51Douglas Gregor Name += '\0'; 1933c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner return MangledNames.GetOrCreateValue(Name.begin(), Name.end()).getKeyData(); 1945f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor} 1955f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor 1966d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 1976d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 1986bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 19949988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 2006bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 2016d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 2026d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 2036bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 2046bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 2056bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 20649988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Type coercion of void()* types. 2076bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 2086bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 2096bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2106bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 2116bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 2126bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 2136bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType::get(llvm::Type::VoidTy, 2146bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<const llvm::Type*>(), 2156bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar false); 2166bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 2176bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2186bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 219572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::StructType* CtorStructTy = 2206bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::StructType::get(llvm::Type::Int32Ty, 2216bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::PointerType::getUnqual(CtorFTy), NULL); 2226bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2236bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 2246bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 2256bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 2266bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 2276bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar S.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, I->second, false)); 2286bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 2296bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 2306bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 2316bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 2326bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 2336bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 2346bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar new llvm::GlobalVariable(AT, false, 235572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 2366bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::ConstantArray::get(AT, Ctors), 2376bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalName, 238572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner &TheModule); 2396d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 2406d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 2416d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 242532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 243532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 244532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 245532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 246532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 247532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 248532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 249532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 250532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 251532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::GlobalValue *gv = 252532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman new llvm::GlobalVariable(Array->getType(), false, 253532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::GlobalValue::AppendingLinkage, Array, 254532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman "llvm.global.annotations", &TheModule); 255532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 256532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 257532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 2585c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbarvoid CodeGenModule::SetGlobalValueAttributes(const Decl *D, 2595c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar bool IsInternal, 2605c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar bool IsInline, 2615c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar llvm::GlobalValue *GV, 2625c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar bool ForDefinition) { 26349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Set up linkage and many other things. Note, this is a simple 264d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes // approximation of what we really want. 265219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (!ForDefinition) { 266219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // Only a few attributes are set on declarations. 2672f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov if (D->getAttr<DLLImportAttr>()) { 2682f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov // The dllimport attribute is overridden by a subsequent declaration as 2692f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov // dllexport. 2703ef5db646a6f66bb23146c3e506c294f31adf018Sebastian Redl if (!D->getAttr<DLLExportAttr>()) { 2712f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov // dllimport attribute can be applied only to function decls, not to 2722f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov // definitions. 2732f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 2742f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov if (!FD->getBody()) 2752f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov GV->setLinkage(llvm::Function::DLLImportLinkage); 2762f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov } else 2772f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov GV->setLinkage(llvm::Function::DLLImportLinkage); 2783ef5db646a6f66bb23146c3e506c294f31adf018Sebastian Redl } 2795e27314eb5a9cba7997cf9f6fc82428d99667077Daniel Dunbar } else if (D->getAttr<WeakAttr>() || 2805e27314eb5a9cba7997cf9f6fc82428d99667077Daniel Dunbar D->getAttr<WeakImportAttr>()) { 2815e27314eb5a9cba7997cf9f6fc82428d99667077Daniel Dunbar // "extern_weak" is overloaded in LLVM; we probably should have 2825e27314eb5a9cba7997cf9f6fc82428d99667077Daniel Dunbar // separate linkage types for this. 283e3fedbeee8a014cd4f4e7cad8e7f6059eae12410Duncan Sands GV->setLinkage(llvm::Function::ExternalWeakLinkage); 2845e27314eb5a9cba7997cf9f6fc82428d99667077Daniel Dunbar } 285219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } else { 286219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (IsInternal) { 287219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar GV->setLinkage(llvm::Function::InternalLinkage); 288219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } else { 2892f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov if (D->getAttr<DLLExportAttr>()) { 2902f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 2912f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov // The dllexport attribute is ignored for undefined symbols. 2922f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov if (FD->getBody()) 2932f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov GV->setLinkage(llvm::Function::DLLExportLinkage); 2942f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov } else 2952f402708e62f89fb875442802e3d3f20fc909d33Anton Korobeynikov GV->setLinkage(llvm::Function::DLLExportLinkage); 2965e27314eb5a9cba7997cf9f6fc82428d99667077Daniel Dunbar } else if (D->getAttr<WeakAttr>() || D->getAttr<WeakImportAttr>() || 2975e27314eb5a9cba7997cf9f6fc82428d99667077Daniel Dunbar IsInline) 298286acbdbe0c82e9a6bcad5fca3c4fa582f3f1a2cMike Stump GV->setLinkage(llvm::Function::WeakAnyLinkage); 299219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } 3000dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar } 301d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 30249988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: Figure out the relative priority of the attribute, 30349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // -fvisibility, and private_extern. 3040dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) 30541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar setGlobalVisibility(GV, attr->getVisibility()); 306d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes // FIXME: else handle -fvisibility 307a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar 30817f194f4393a67fd28ad822c06d32b8cb99bad3fDaniel Dunbar if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 30917f194f4393a67fd28ad822c06d32b8cb99bad3fDaniel Dunbar GV->setSection(SA->getName()); 3105c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar 3115c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // Only add to llvm.used when we see a definition, otherwise we 3125c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // might add multiple times or risk the value being replaced by a 3135c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // subsequent RAUW. 3145c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar if (ForDefinition) { 3155c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar if (D->getAttr<UsedAttr>()) 3165c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar AddUsedGlobal(GV); 3175c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar } 318d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 319d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 320761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patelvoid CodeGenModule::SetFunctionAttributes(const Decl *D, 32145c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar const CGFunctionInfo &Info, 322b768807c49a1c7085def099b848631856af766faDaniel Dunbar llvm::Function *F) { 323761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 32488b5396b0897f28d22ae3debf4a0d97b33b6c362Daniel Dunbar ConstructAttributeList(Info, D, AttributeList); 325c134fcb0d7989fe6937e47e6216637647e074aefEli Friedman 326761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 327761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeList.size())); 328ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman 329ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman // Set the appropriate calling convention for the Function. 33045c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar if (D->getAttr<FastCallAttr>()) 331f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov F->setCallingConv(llvm::CallingConv::X86_FastCall); 332f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov 333f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov if (D->getAttr<StdCallAttr>()) 334f1c9c09e2e2220e4bbfb7e9d8adf9bf2c2406b80Anton Korobeynikov F->setCallingConv(llvm::CallingConv::X86_StdCall); 335f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 336f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 337f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar/// SetFunctionAttributesForDefinition - Set function attributes 338f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar/// specific to a function definition. 339219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbarvoid CodeGenModule::SetFunctionAttributesForDefinition(const Decl *D, 340219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::Function *F) { 341219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (isa<ObjCMethodDecl>(D)) { 342219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetGlobalValueAttributes(D, true, false, F, true); 343219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } else { 344219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar const FunctionDecl *FD = cast<FunctionDecl>(D); 345219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetGlobalValueAttributes(FD, FD->getStorageClass() == FunctionDecl::Static, 346219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar FD->isInline(), F, true); 347219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } 348219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 34974ac74ae244c501027924c99f2a33559a1e23b53Daniel Dunbar if (!Features.Exceptions && !Features.ObjCNonFragileABI) 350f93349f3ec4d69eafba42436c33aaa91bfca7e70Daniel Dunbar F->addFnAttr(llvm::Attribute::NoUnwind); 351af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar 352af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar if (D->getAttr<AlwaysInlineAttr>()) 353af668b0e7d3581dea3b4f29a9262686e83887e5bDaniel Dunbar F->addFnAttr(llvm::Attribute::AlwaysInline); 35481ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson 35581ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson if (D->getAttr<NoinlineAttr>()) 35681ebbde0fb30a40df0f5e913d8a1f71c383d271aAnders Carlsson F->addFnAttr(llvm::Attribute::NoInline); 357f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 358f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 359f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbarvoid CodeGenModule::SetMethodAttributes(const ObjCMethodDecl *MD, 360f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar llvm::Function *F) { 361541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar SetFunctionAttributes(MD, getTypes().getFunctionInfo(MD), F); 362f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 363219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetFunctionAttributesForDefinition(MD, F); 364f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 365f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 366f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbarvoid CodeGenModule::SetFunctionAttributes(const FunctionDecl *FD, 367f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar llvm::Function *F) { 368541b63b1a9db77e4a8670e9823711c2c12e58afbDaniel Dunbar SetFunctionAttributes(FD, getTypes().getFunctionInfo(FD), F); 36945c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 370219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetGlobalValueAttributes(FD, FD->getStorageClass() == FunctionDecl::Static, 371219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar FD->isInline(), F, false); 372219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 373219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 37445c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 375219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbarvoid CodeGenModule::EmitAliases() { 376219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar for (unsigned i = 0, e = Aliases.size(); i != e; ++i) { 3775e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar const ValueDecl *D = Aliases[i]; 378219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar const AliasAttr *AA = D->getAttr<AliasAttr>(); 379219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 380219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // This is something of a hack, if the FunctionDecl got overridden 381219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // then its attributes will be moved to the new declaration. In 382219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // this case the current decl has no alias attribute, but we will 383219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // eventually see it. 384219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (!AA) 385219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar continue; 386219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 387219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar const std::string& aliaseeName = AA->getAliasee(); 3885e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar llvm::GlobalValue *aliasee = getModule().getNamedValue(aliaseeName); 389219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (!aliasee) { 390219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // FIXME: This isn't unsupported, this is just an error, which 391219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // sema should catch, but... 392219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar ErrorUnsupported(D, "alias referencing a missing function"); 393219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar continue; 394219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } 395219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 3965d4f5c724533b994de05df49ae259120482ec366Chris Lattner const char *MangledName = getMangledName(D); 397219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::GlobalValue *GA = 398219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar new llvm::GlobalAlias(aliasee->getType(), 399219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::Function::ExternalLinkage, 4005d4f5c724533b994de05df49ae259120482ec366Chris Lattner MangledName, aliasee, &getModule()); 401219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 4025d4f5c724533b994de05df49ae259120482ec366Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 403219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (Entry) { 404219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // If we created a dummy function for this then replace it. 405219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar GA->takeName(Entry); 406219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 407219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::Value *Casted = 408219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::ConstantExpr::getBitCast(GA, Entry->getType()); 409219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar Entry->replaceAllUsesWith(Casted); 410219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar Entry->eraseFromParent(); 411ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman 412219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar Entry = GA; 413219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } 414219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 415219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // Alias should never be internal or inline. 416219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetGlobalValueAttributes(D, false, false, GA, true); 417219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } 418ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman} 419ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman 4200269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::AddUsedGlobal(llvm::GlobalValue *GV) { 4210269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar assert(!GV->isDeclaration() && 4220269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "Only globals with definition can force usage."); 4230269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::Type *i8PTy = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 4240269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar LLVMUsed.push_back(llvm::ConstantExpr::getBitCast(GV, i8PTy)); 4250269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 4260269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4270269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitLLVMUsed() { 4280269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Don't create llvm.used if there is no need. 4290269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar if (LLVMUsed.empty()) 4300269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar return; 4310269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4320269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::ArrayType *ATy = llvm::ArrayType::get(LLVMUsed[0]->getType(), 4330269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar LLVMUsed.size()); 4340269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalVariable *GV = 4350269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar new llvm::GlobalVariable(ATy, false, 4360269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::GlobalValue::AppendingLinkage, 4370269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar llvm::ConstantArray::get(ATy, LLVMUsed), 4380269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar "llvm.used", &getModule()); 4390269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4400269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar GV->setSection("llvm.metadata"); 4410269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar} 4420269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar 4430269871c9cba493f76237175ab60313406f3bafaDaniel Dunbarvoid CodeGenModule::EmitDeferred() { 4440269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // Emit code for any deferred decl which was used. Since a 4450269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // previously unused static decl may become used during the 4460269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // generation of code for a static function, iterate until no 4470269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar // changes are made. 4484c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman bool Changed; 4494c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman do { 4504c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman Changed = false; 451b723f7520bcce5f13ccaae557c16a1e7133b6908Anders Carlsson 4520269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar for (std::list<const ValueDecl*>::iterator i = DeferredDecls.begin(), 4530269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar e = DeferredDecls.end(); i != e; ) { 454b723f7520bcce5f13ccaae557c16a1e7133b6908Anders Carlsson const ValueDecl *D = *i; 455b723f7520bcce5f13ccaae557c16a1e7133b6908Anders Carlsson 4566f7e2eee917a136ffc36834f020782b3f15d8fa6Eli Friedman // Check if we have used a decl with the same name 4576f7e2eee917a136ffc36834f020782b3f15d8fa6Eli Friedman // FIXME: The AST should have some sort of aggregate decls or 4586f7e2eee917a136ffc36834f020782b3f15d8fa6Eli Friedman // global symbol map. 459219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // FIXME: This is missing some important cases. For example, we 46073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // need to check for uses in an alias. 4615f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor if (!GlobalDeclMap.count(getMangledName(D))) { 462232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar ++i; 463a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar continue; 464b723f7520bcce5f13ccaae557c16a1e7133b6908Anders Carlsson } 465b723f7520bcce5f13ccaae557c16a1e7133b6908Anders Carlsson 466bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Emit the definition. 467bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalDefinition(D); 468bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 4694c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman // Erase the used decl from the list. 4700269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar i = DeferredDecls.erase(i); 471b723f7520bcce5f13ccaae557c16a1e7133b6908Anders Carlsson 4724c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman // Remember that we made a change. 4734c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman Changed = true; 4744c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 4754c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } while (Changed); 4765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4788bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 4798bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 4808bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 4813c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar/// GlobalValue being annotated. The second field is the constant string 4828bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// created from the AnnotateAttr's annotation. The third field is a constant 4838bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 4848bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 4858bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4868bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 4878bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 4888bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 4898bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begemanllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 4908bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 4918bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 4928bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 4938bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 4948bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 4958bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 4968bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const llvm::Type *SBP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 4978bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *anno = llvm::ConstantArray::get(AA->getAnnotation(), true); 4988bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *unit = llvm::ConstantArray::get(M->getModuleIdentifier(), 4998bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 5008bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 5018bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 5028bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 5038bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *annoGV = 5048bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman new llvm::GlobalVariable(anno->getType(), false, 5058bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue::InternalLinkage, anno, 5068bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman GV->getName() + ".str", M); 5078bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 5088bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 5098bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman new llvm::GlobalVariable(unit->getType(), false, 5108bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue::InternalLinkage, unit, ".str", M); 5118bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 5128bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Create the ConstantStruct that is the global annotion. 5138bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 5148bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantExpr::getBitCast(GV, SBP), 5158bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantExpr::getBitCast(annoGV, SBP), 5168bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantExpr::getBitCast(unitGV, SBP), 5178bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantInt::get(llvm::Type::Int32Ty, LineNo) 5188bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 5198bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman return llvm::ConstantStruct::get(Fields, 4, false); 5208bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 5218bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 52273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbarbool CodeGenModule::MayDeferGeneration(const ValueDecl *Global) { 5235c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // Never defer when EmitAllDecls is specified or the decl has 5245c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar // attribute used. 5255c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar if (Features.EmitAllDecls || Global->getAttr<UsedAttr>()) 52673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 527bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 528bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 52973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Constructors and destructors should never be deferred. 53073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (FD->getAttr<ConstructorAttr>() || FD->getAttr<DestructorAttr>()) 53173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 53273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 53399b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // FIXME: What about inline, and/or extern inline? 53473241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (FD->getStorageClass() != FunctionDecl::Static) 53573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 53673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar } else { 53773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 53899b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner assert(VD->isFileVarDecl() && "Invalid decl"); 53973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 54073241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (VD->getStorageClass() != VarDecl::Static) 54173241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return false; 54273241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar } 54373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 54473241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return true; 54573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar} 54673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar 54773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbarvoid CodeGenModule::EmitGlobal(const ValueDecl *Global) { 5485e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar // Aliases are deferred until code for everything else has been 5495e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar // emitted. 5505e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (Global->getAttr<AliasAttr>()) { 5515e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar Aliases.push_back(Global); 5525e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar return; 5535e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar } 554219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 5555e1e1f95c98b1add70c238093bbd5dc8d4f9c4e9Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 55673241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 55773241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (!FD->isThisDeclarationADefinition()) 55873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 5590269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar } else { 5600269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar const VarDecl *VD = cast<VarDecl>(Global); 561bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 562bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 56373241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Forward declarations are emitted lazily on first use. 5647542bca16b63c84e401b44b586ac3378aed446c5Daniel Dunbar if (!VD->getInit() && VD->hasExternalStorage()) 56573241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar return; 5664c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 5674c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 56873241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar // Defer code generation when possible. 56973241dfeb5c498255b662984cca369fd28ec3147Daniel Dunbar if (MayDeferGeneration(Global)) { 5700269871c9cba493f76237175ab60313406f3bafaDaniel Dunbar DeferredDecls.push_back(Global); 571bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 572bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 573bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 574bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Otherwise emit the definition. 575bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalDefinition(Global); 5764c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 5774c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 578bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalDefinition(const ValueDecl *D) { 579bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 580bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalFunctionDefinition(FD); 581bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 582bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalVarDefinition(VD); 583bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } else { 584bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(0 && "Invalid argument to EmitGlobalDefinition()"); 585bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 586bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 587bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 5889986eabd4423d867262c358ca62f94a60ac58412Daniel Dunbar llvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D) { 58977ba708819285931932ecd33691a672bb59d221aEli Friedman assert(D->hasGlobalStorage() && "Not a global variable"); 59077ba708819285931932ecd33691a672bb59d221aEli Friedman 591bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar QualType ASTTy = D->getType(); 592bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar const llvm::Type *Ty = getTypes().ConvertTypeForMem(ASTTy); 593bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 5943c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 5955d4f5c724533b994de05df49ae259120482ec366Chris Lattner const char *MangledName = getMangledName(D); 5965d4f5c724533b994de05df49ae259120482ec366Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 59799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry) { 59899b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner const llvm::Type *PTy = llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 59999b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner 60099b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Make sure the result is of the correct type. 60199b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (Entry->getType() != PTy) 60299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner return llvm::ConstantExpr::getBitCast(Entry, PTy); 60399b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner return Entry; 60499b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner } 60599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner 60699b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalVariable *GV = 60799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner new llvm::GlobalVariable(Ty, false, 60899b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner llvm::GlobalValue::ExternalLinkage, 6095d4f5c724533b994de05df49ae259120482ec366Chris Lattner 0, MangledName, &getModule(), 61099b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner 0, ASTTy.getAddressSpace()); 61149988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 61299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // Handle things which are present even on external declarations. 61349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 61499b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // FIXME: This code is overly simple and should be merged with 61599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // other global handling. 61649988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 61799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner GV->setConstant(D->getType().isConstant(Context)); 61849988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 61999b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner // FIXME: Merge with other attribute handling code. 620eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 62199b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (D->getStorageClass() == VarDecl::PrivateExtern) 62299b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner setGlobalVisibility(GV, VisibilityAttr::HiddenVisibility); 623eda9a5ec380f172f4e0063744eb796144a125480Daniel Dunbar 62499b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner if (D->getAttr<WeakAttr>() || D->getAttr<WeakImportAttr>()) 62599b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); 6263f75c43bd77e063342bc888ac276daf64ba0ce07Daniel Dunbar 62799b53613ebe2c59d41030e987962c1ed101b2efeChris Lattner return Entry = GV; 628bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 629bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 630bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 6318f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 63277ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 63377ba708819285931932ecd33691a672bb59d221aEli Friedman const llvm::Type *VarTy = getTypes().ConvertTypeForMem(ASTTy); 63477ba708819285931932ecd33691a672bb59d221aEli Friedman 6358f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner if (D->getInit() == 0) { 636cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 637cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // implicitly initialized with { 0 } 6382d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type *InitTy = VarTy; 639cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman if (ASTTy->isIncompleteArrayType()) { 640cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // An incomplete array is normally [ TYPE x 0 ], but we need 641cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // to fix it to [ TYPE x 1 ]. 642cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman const llvm::ArrayType* ATy = cast<llvm::ArrayType>(VarTy); 643cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman InitTy = llvm::ArrayType::get(ATy->getElementType(), 1); 644cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman } 645cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman Init = llvm::Constant::getNullValue(InitTy); 64677ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 647bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar Init = EmitConstantExpr(D->getInit()); 6486e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman if (!Init) { 649232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar ErrorUnsupported(D, "static initializer"); 6506e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman QualType T = D->getInit()->getType(); 6516e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman Init = llvm::UndefValue::get(getTypes().ConvertType(T)); 6526e656f45ae04b415ba7a4c0c25e55633e2d0ecd0Eli Friedman } 6538f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 6548e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 6552d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner const llvm::Type* InitType = Init->getType(); 6565d4f5c724533b994de05df49ae259120482ec366Chris Lattner const char *MangledName = getMangledName(D); 6575d4f5c724533b994de05df49ae259120482ec366Chris Lattner llvm::GlobalValue *&Entry = GlobalDeclMap[MangledName]; 6583c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar llvm::GlobalVariable *GV = cast_or_null<llvm::GlobalVariable>(Entry); 6593c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar 66077ba708819285931932ecd33691a672bb59d221aEli Friedman if (!GV) { 66177ba708819285931932ecd33691a672bb59d221aEli Friedman GV = new llvm::GlobalVariable(InitType, false, 66277ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::GlobalValue::ExternalLinkage, 6635d4f5c724533b994de05df49ae259120482ec366Chris Lattner 0, MangledName, 6645f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor &getModule(), 0, ASTTy.getAddressSpace()); 665232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 666232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar } else if (GV->hasInitializer() && !GV->getInitializer()->isNullValue()) { 667232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // If we already have this global and it has an initializer, then 668232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // we are in the rare situation where we emitted the defining 669232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // declaration of the global and are now being asked to emit a 670232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // definition which would be common. This occurs, for example, in 671232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // the following situation because statics can be emitted out of 672232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // order: 673232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // 674232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // static int x; 675232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // static int *y = &x; 676232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // static int x = 10; 677232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // int **z = &y; 678232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // 679232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // Bail here so we don't blow away the definition. Note that if we 680232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // can't distinguish here if we emitted a definition with a null 681232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar // initializer, but this case is safe. 682232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar assert(!D->getInit() && "Emitting multiple definitions of a decl!"); 683232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar return; 684232350d4faf46ec38d5ff60e11505f9c4fa9535bDaniel Dunbar 6853c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar } else if (GV->getType() != 6863c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar llvm::PointerType::get(InitType, ASTTy.getAddressSpace())) { 68777ba708819285931932ecd33691a672bb59d221aEli Friedman // We have a definition after a prototype with the wrong type. 68877ba708819285931932ecd33691a672bb59d221aEli Friedman // We must make a new GlobalVariable* and update everything that used OldGV 68977ba708819285931932ecd33691a672bb59d221aEli Friedman // (a declaration or tentative definition) with the new GlobalVariable* 69077ba708819285931932ecd33691a672bb59d221aEli Friedman // (which will be a definition). 69177ba708819285931932ecd33691a672bb59d221aEli Friedman // 6922d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner // This happens if there is a prototype for a global (e.g. 6932d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner // "extern int x[];") and then a definition of a different type (e.g. 6942d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner // "int x[10];"). This also happens when an initializer has a different type 6952d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner // from the type of the global (this happens with unions). 696cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // 697cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // FIXME: This also ends up happening if there's a definition followed by 698cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // a tentative definition! (Although Sema rejects that construct 699cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // at the moment.) 70077ba708819285931932ecd33691a672bb59d221aEli Friedman 70177ba708819285931932ecd33691a672bb59d221aEli Friedman // Save the old global 70277ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::GlobalVariable *OldGV = GV; 70377ba708819285931932ecd33691a672bb59d221aEli Friedman 70477ba708819285931932ecd33691a672bb59d221aEli Friedman // Make a new global with the correct type 70577ba708819285931932ecd33691a672bb59d221aEli Friedman GV = new llvm::GlobalVariable(InitType, false, 70677ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::GlobalValue::ExternalLinkage, 7075d4f5c724533b994de05df49ae259120482ec366Chris Lattner 0, MangledName, 7085f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor &getModule(), 0, ASTTy.getAddressSpace()); 70977ba708819285931932ecd33691a672bb59d221aEli Friedman // Steal the name of the old global 71077ba708819285931932ecd33691a672bb59d221aEli Friedman GV->takeName(OldGV); 71177ba708819285931932ecd33691a672bb59d221aEli Friedman 71277ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 71377ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::Constant *NewPtrForOldDecl = 71477ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); 71577ba708819285931932ecd33691a672bb59d221aEli Friedman OldGV->replaceAllUsesWith(NewPtrForOldDecl); 71677ba708819285931932ecd33691a672bb59d221aEli Friedman 71777ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 7182d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner // FIXME: What if it was attribute used? Dangling pointer from LLVMUsed. 71977ba708819285931932ecd33691a672bb59d221aEli Friedman OldGV->eraseFromParent(); 72077ba708819285931932ecd33691a672bb59d221aEli Friedman } 72177ba708819285931932ecd33691a672bb59d221aEli Friedman 7223c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar Entry = GV; 7239e32d4b4a7270a9701b7cb454381eeaa4cc42a77Devang Patel 7248bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 7258bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 7268bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 727f7cf85b330bedd2877e1371fb0a83e99751ae162Chris Lattner SM.getInstantiationLineNumber(D->getLocation()))); 7288bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 7298bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 73088a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 731b381aac9bae6d608c72267dd0ed08ec6369e94e4Nuno Lopes GV->setConstant(D->getType().isConstant(Context)); 7320de40af3a3aa14e3854c0eafeabd08f6762801f9Eli Friedman GV->setAlignment(getContext().getDeclAlignInBytes(D)); 73308d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman 734ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) 73541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar setGlobalVisibility(GV, attr->getVisibility()); 736ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner // FIXME: else handle -fvisibility 737a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar 73888a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 7398fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner if (D->getStorageClass() == VarDecl::Static) 7408fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 7418fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner else if (D->getAttr<DLLImportAttr>()) 742ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLImportLinkage); 743ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner else if (D->getAttr<DLLExportAttr>()) 744ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLExportLinkage); 7455e27314eb5a9cba7997cf9f6fc82428d99667077Daniel Dunbar else if (D->getAttr<WeakAttr>() || D->getAttr<WeakImportAttr>()) 746286acbdbe0c82e9a6bcad5fca3c4fa582f3f1a2cMike Stump GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); 7478fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner else { 748ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner // FIXME: This isn't right. This should handle common linkage and other 749ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner // stuff. 750ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner switch (D->getStorageClass()) { 7518fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner case VarDecl::Static: assert(0 && "This case handled above"); 752ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner case VarDecl::Auto: 753ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner case VarDecl::Register: 754ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner assert(0 && "Can't have auto or register globals"); 755ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner case VarDecl::None: 756ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner if (!D->getInit()) 757ceb77d909f80d4949ee6177094510413c391cddcDuncan Sands GV->setLinkage(llvm::GlobalVariable::CommonLinkage); 75898883e1e699457697fb8d5ac6d175dd3ee078774Anders Carlsson else 75998883e1e699457697fb8d5ac6d175dd3ee078774Anders Carlsson GV->setLinkage(llvm::GlobalVariable::ExternalLinkage); 760ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner break; 761ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner case VarDecl::Extern: 76249988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: common 76349988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar break; 76449988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar 765ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner case VarDecl::PrivateExtern: 76649988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 76749988884c1da4b2200bfe2298a1e41b3f044e8d4Daniel Dunbar // FIXME: common 768ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner break; 769ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner } 77088a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner } 771686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta 77217f194f4393a67fd28ad822c06d32b8cb99bad3fDaniel Dunbar if (const SectionAttr *SA = D->getAttr<SectionAttr>()) 77317f194f4393a67fd28ad822c06d32b8cb99bad3fDaniel Dunbar GV->setSection(SA->getName()); 77417f194f4393a67fd28ad822c06d32b8cb99bad3fDaniel Dunbar 7755c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar if (D->getAttr<UsedAttr>()) 7765c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar AddUsedGlobal(GV); 7775c61d97ad442b2c0bbecb617c8f21857ce1fff6dDaniel Dunbar 778686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta // Emit global variable debug information. 7792d58406872e5af0c924623d9f7c194c4f09936d3Chris Lattner if (CGDebugInfo *DI = getDebugInfo()) { 78066031a5594bc9a7dc0dc5137c3e7955f835e4639Daniel Dunbar DI->setLocation(D->getLocation()); 781686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta DI->EmitGlobalVariable(GV, D); 782686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 78388a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 7845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 78562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner/// CreateFunctionPrototypeIR - Create a new LLVM IR Function for the given 78662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner/// decl and set attributes as appropriate. 78762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner/// 78862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner/// \arg Ty - If non-null the LLVM function type to use for the 78962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner/// decl; it is the callers responsibility to make sure this is 79062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner/// compatible with the correct type. 791bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarllvm::GlobalValue * 79262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris LattnerCodeGenModule::CreateFunctionPrototypeIR(const FunctionDecl *D, 79362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner const llvm::Type *Ty) { 79462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner bool ShouldSetAttributes = true; 7952136b2e9345c23c26426110873dd97ef5d761ef2Eli Friedman if (!Ty) { 796d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar Ty = getTypes().ConvertType(D->getType()); 7972136b2e9345c23c26426110873dd97ef5d761ef2Eli Friedman if (!isa<llvm::FunctionType>(Ty)) { 7982136b2e9345c23c26426110873dd97ef5d761ef2Eli Friedman // This function doesn't have a complete type (for example, the return 7992136b2e9345c23c26426110873dd97ef5d761ef2Eli Friedman // type is an incomplete struct). Use a fake type instead, and make 8002136b2e9345c23c26426110873dd97ef5d761ef2Eli Friedman // sure not to try to set attributes. 8012136b2e9345c23c26426110873dd97ef5d761ef2Eli Friedman Ty = llvm::FunctionType::get(llvm::Type::VoidTy, 8022136b2e9345c23c26426110873dd97ef5d761ef2Eli Friedman std::vector<const llvm::Type*>(), false); 80362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner ShouldSetAttributes = false; 8042136b2e9345c23c26426110873dd97ef5d761ef2Eli Friedman } 8052136b2e9345c23c26426110873dd97ef5d761ef2Eli Friedman } 80642745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar llvm::Function *F = llvm::Function::Create(cast<llvm::FunctionType>(Ty), 80742745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar llvm::Function::ExternalLinkage, 80842745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar getMangledName(D), 80942745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar &getModule()); 81062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner if (ShouldSetAttributes) 8112136b2e9345c23c26426110873dd97ef5d761ef2Eli Friedman SetFunctionAttributes(D, F); 812219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar return F; 813bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 814bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 815bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfFunction(const FunctionDecl *D) { 8163c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 8175f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor llvm::GlobalValue *&Entry = GlobalDeclMap[getMangledName(D)]; 8183c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar if (!Entry) 81962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner return Entry = CreateFunctionPrototypeIR(D, 0); 820bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 82162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner const llvm::Type *Ty = getTypes().ConvertTypeForMem(D->getType()); 82262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner if (Entry->getType()->getElementType() == Ty) 82362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner return Entry; 82462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 82562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner const llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); 82662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner return llvm::ConstantExpr::getBitCast(Entry, PTy); 827bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 828bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 829bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalFunctionDefinition(const FunctionDecl *D) { 830d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar const llvm::FunctionType *Ty = 831d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar cast<llvm::FunctionType>(getTypes().ConvertType(D->getType())); 832d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar 833d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar // As a special case, make sure that definitions of K&R function 834d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar // "type foo()" aren't declared as varargs (which forces the backend 835d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar // to do unnecessary work). 836d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar if (Ty->isVarArg() && Ty->getNumParams() == 0 && Ty->isVarArg()) 837d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar Ty = llvm::FunctionType::get(Ty->getReturnType(), 83862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner std::vector<const llvm::Type*>(), false); 839d5d31801fc87239436fa349c89dce7797cf13537Daniel Dunbar 8405f2bfd4811996abb783aa6c7254c56baa6930e8cDouglas Gregor llvm::GlobalValue *&Entry = GlobalDeclMap[getMangledName(D)]; 8413c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar if (!Entry) { 84262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner Entry = CreateFunctionPrototypeIR(D, Ty); 84362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner } else if (Entry->getType()->getElementType() != Ty) { 84442745815fa4e90bfb07e581d2e5152b2c2db08ffDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 84562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 84662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // F is the Function* for the one with the wrong type, we must make a new 84762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* and update everything that used F (a declaration) with the new 84862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Function* (which will be a definition). 84962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // 85062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // This happens if there is a prototype for a function 85162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f()") and then a definition of a different type 85262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // (e.g. "int f(int x)"). Start by making a new function of the 85362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // correct type, RAUW, then steal the name. 85462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner llvm::GlobalValue *NewFn = CreateFunctionPrototypeIR(D, Ty); 85562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner NewFn->takeName(Entry); 85662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 85762b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Replace uses of F with the Function we will endow with a body. 85862b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner llvm::Constant *NewPtrForOldDecl = 85962b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 86062b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner Entry->replaceAllUsesWith(NewPtrForOldDecl); 86162b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 86262b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner // Ok, delete the old function now, which is dead. 86362b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner assert(Entry->isDeclaration() && "Shouldn't replace non-declaration"); 86462b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner Entry->eraseFromParent(); 86562b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner 86662b33ea51adbd0e7f2f05983e9e4a3a2b2ed26deChris Lattner Entry = NewFn; 867bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 868bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 869219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::Function *Fn = cast<llvm::Function>(Entry); 870219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 8716379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 872219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetFunctionAttributesForDefinition(D, Fn); 873219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 874219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) { 875219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 876219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } else if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) { 877219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 878bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 879bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 880bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 881f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbarllvm::Function * 882f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel DunbarCodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy, 883f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar const std::string &Name) { 884f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar llvm::Function *Fn = llvm::Function::Create(FTy, 885f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar llvm::Function::ExternalLinkage, 886f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar "", &TheModule); 887b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar RuntimeGlobals.push_back(std::make_pair(Fn, Name)); 888f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar return Fn; 889f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar} 890f1968f28869f4e0675450ae39c478a37c5b9abd6Daniel Dunbar 891b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbarllvm::GlobalVariable * 892b681b8ffab2aa016b3897916d5110927c34a584bDaniel DunbarCodeGenModule::CreateRuntimeVariable(const llvm::Type *Ty, 893b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar const std::string &Name) { 894b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar llvm::GlobalVariable *GV = 895b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar new llvm::GlobalVariable(Ty, /*Constant=*/false, 896b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar llvm::GlobalValue::ExternalLinkage, 897b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar 0, "", &TheModule); 898b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar RuntimeGlobals.push_back(std::make_pair(GV, Name)); 899b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar return GV; 900b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar} 901b681b8ffab2aa016b3897916d5110927c34a584bDaniel Dunbar 902c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattnervoid CodeGenModule::UpdateCompletedType(const TagDecl *TD) { 903c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattner // Make sure that this type is translated. 904c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattner Types.UpdateCompletedType(TD); 905d86e6bc7ab4388a578daf46e7c76be9122a25072Chris Lattner} 906d86e6bc7ab4388a578daf46e7c76be9122a25072Chris Lattner 907d86e6bc7ab4388a578daf46e7c76be9122a25072Chris Lattner 908bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner/// getBuiltinLibFunction 909c136e6cf237711f9f1324637a0b2cdf6ae8e79e4Mike Stumpllvm::Value *CodeGenModule::getBuiltinLibFunction(unsigned BuiltinID) { 9101426fecdf90dd1986751b9940422e675880ff671Chris Lattner if (BuiltinID > BuiltinFunctions.size()) 9111426fecdf90dd1986751b9940422e675880ff671Chris Lattner BuiltinFunctions.resize(BuiltinID); 912bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 9131426fecdf90dd1986751b9940422e675880ff671Chris Lattner // Cache looked up functions. Since builtin id #0 is invalid we don't reserve 9141426fecdf90dd1986751b9940422e675880ff671Chris Lattner // a slot for it. 9151426fecdf90dd1986751b9940422e675880ff671Chris Lattner assert(BuiltinID && "Invalid Builtin ID"); 916c136e6cf237711f9f1324637a0b2cdf6ae8e79e4Mike Stump llvm::Value *&FunctionSlot = BuiltinFunctions[BuiltinID-1]; 917bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner if (FunctionSlot) 918bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner return FunctionSlot; 919bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 9203e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor assert((Context.BuiltinInfo.isLibFunction(BuiltinID) || 9213e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) && 9223e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor "isn't a lib fn"); 923bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 9243e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor // Get the name, skip over the __builtin_ prefix (if necessary). 9253e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor const char *Name = Context.BuiltinInfo.GetName(BuiltinID); 9263e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor if (Context.BuiltinInfo.isLibFunction(BuiltinID)) 9273e41d60eb627dc227c770f1c1c87d06909cf05fdDouglas Gregor Name += 10; 928bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 929bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // Get the type for the builtin. 930370ab3f1373841d70582feac9e35c3c6b3489f63Douglas Gregor Builtin::Context::GetBuiltinTypeError Error; 931370ab3f1373841d70582feac9e35c3c6b3489f63Douglas Gregor QualType Type = Context.BuiltinInfo.GetBuiltinType(BuiltinID, Context, Error); 932370ab3f1373841d70582feac9e35c3c6b3489f63Douglas Gregor assert(Error == Builtin::Context::GE_None && "Can't get builtin type"); 933370ab3f1373841d70582feac9e35c3c6b3489f63Douglas Gregor 934bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner const llvm::FunctionType *Ty = 935bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner cast<llvm::FunctionType>(getTypes().ConvertType(Type)); 936bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 937bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // FIXME: This has a serious problem with code like this: 938bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // void abs() {} 939bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // ... __builtin_abs(x); 940bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // The two versions of abs will collide. The fix is for the builtin to win, 941bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // and for the existing one to be turned into a constantexpr cast of the 942bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // builtin. In the case where the existing one is a static function, it 943bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // should just be renamed. 944c5e940fa551840ecd71e8116c316c9131490f5faChris Lattner if (llvm::Function *Existing = getModule().getFunction(Name)) { 945c5e940fa551840ecd71e8116c316c9131490f5faChris Lattner if (Existing->getFunctionType() == Ty && Existing->hasExternalLinkage()) 946c5e940fa551840ecd71e8116c316c9131490f5faChris Lattner return FunctionSlot = Existing; 947c5e940fa551840ecd71e8116c316c9131490f5faChris Lattner assert(Existing == 0 && "FIXME: Name collision"); 948c5e940fa551840ecd71e8116c316c9131490f5faChris Lattner } 949bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 9504667c4a309f7d49f858e14c4c2462fe595bcc536Chris Lattner llvm::GlobalValue *&ExistingFn = 9514667c4a309f7d49f858e14c4c2462fe595bcc536Chris Lattner GlobalDeclMap[getContext().Idents.get(Name).getName()]; 9525b60a0e369521825f892d755150255645d923646Chris Lattner assert(!ExistingFn && "Asking for the same builtin multiple times?"); 953c136e6cf237711f9f1324637a0b2cdf6ae8e79e4Mike Stump 954bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // FIXME: param attributes for sext/zext etc. 9554667c4a309f7d49f858e14c4c2462fe595bcc536Chris Lattner return FunctionSlot = ExistingFn = 9564c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman llvm::Function::Create(Ty, llvm::Function::ExternalLinkage, Name, 9574c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman &getModule()); 958bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 959bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 9607acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 9617acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 9627acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 9637acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 9647acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 965bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 9665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerllvm::Function *CodeGenModule::getMemCpyFn() { 9675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (MemCpyFn) return MemCpyFn; 9684e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *IntPtr = TheTargetData.getIntPtrType(); 9694e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemCpyFn = getIntrinsic(llvm::Intrinsic::memcpy, &IntPtr, 1); 9705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 971c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 9720c99509927a0c7a48490486b9fec287b63e5c09cEli Friedmanllvm::Function *CodeGenModule::getMemMoveFn() { 9730c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman if (MemMoveFn) return MemMoveFn; 9744e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *IntPtr = TheTargetData.getIntPtrType(); 9754e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemMoveFn = getIntrinsic(llvm::Intrinsic::memmove, &IntPtr, 1); 9760c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman} 9770c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman 97841ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venanciollvm::Function *CodeGenModule::getMemSetFn() { 97941ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio if (MemSetFn) return MemSetFn; 9804e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *IntPtr = TheTargetData.getIntPtrType(); 9814e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner return MemSetFn = getIntrinsic(llvm::Intrinsic::memset, &IntPtr, 1); 98241ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio} 9837acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner 984e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlssonstatic void appendFieldAndPadding(CodeGenModule &CGM, 985e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson std::vector<llvm::Constant*>& Fields, 98644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldDecl *FieldD, FieldDecl *NextFieldD, 98744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor llvm::Constant* Field, 9883c8f153ae767fa55b2da74438c7f8ec370a06d6fChris Lattner RecordDecl* RD, const llvm::StructType *STy) { 989e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson // Append the field. 990e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson Fields.push_back(Field); 991e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 99244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor int StructFieldNo = CGM.getTypes().getLLVMFieldNo(FieldD); 993e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 994e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson int NextStructFieldNo; 99544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (!NextFieldD) { 996e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson NextStructFieldNo = STy->getNumElements(); 997e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson } else { 99844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextStructFieldNo = CGM.getTypes().getLLVMFieldNo(NextFieldD); 999e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson } 1000e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1001e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson // Append padding 1002e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson for (int i = StructFieldNo + 1; i < NextStructFieldNo; i++) { 1003e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson llvm::Constant *C = 1004e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson llvm::Constant::getNullValue(STy->getElementType(StructFieldNo + 1)); 1005e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1006e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson Fields.push_back(C); 1007e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson } 1008e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson} 1009e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 10103e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar// We still need to work out the details of handling UTF-16. 10113e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar// See: <rdr://2996215> 1012bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattnerllvm::Constant *CodeGenModule:: 1013bef20ac367a09555b30d6eb3847a81ec164caf88Chris LattnerGetAddrOfConstantCFString(const std::string &str) { 1014c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson llvm::StringMapEntry<llvm::Constant *> &Entry = 1015c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson CFConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 1016c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1017c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (Entry.getValue()) 1018c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson return Entry.getValue(); 1019c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 10203e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zero = llvm::Constant::getNullValue(llvm::Type::Int32Ty); 10213e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 1022c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1023c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 1024c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 1025c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = llvm::ArrayType::get(Ty, 0); 10263e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 10273e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // FIXME: This is fairly broken if 10283e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // __CFConstantStringClassReference is already defined, in that it 10293e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // will get renamed and the user will most likely see an opaque 10303e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // error message. This is a general issue with relying on 10313e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // particular names. 10323e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::GlobalVariable *GV = 1033c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson new llvm::GlobalVariable(Ty, false, 1034c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson llvm::GlobalVariable::ExternalLinkage, 0, 1035c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson "__CFConstantStringClassReference", 1036c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson &getModule()); 10373e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 10383e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 10393e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 10403e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 1041c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 1042c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1043e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson QualType CFTy = getContext().getCFConstantStringType(); 1044e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson RecordDecl *CFRD = CFTy->getAsRecordType()->getDecl(); 10453e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 1046e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson const llvm::StructType *STy = 1047e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson cast<llvm::StructType>(getTypes().ConvertType(CFTy)); 1048e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson 1049e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson std::vector<llvm::Constant*> Fields; 105044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor RecordDecl::field_iterator Field = CFRD->field_begin(); 105144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 1052c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 105344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldDecl *CurField = *Field++; 105444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldDecl *NextField = *Field++; 105544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 105644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CFConstantStringClassRef, CFRD, STy); 1057c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1058c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 105944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CurField = NextField; 106044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextField = *Field++; 10613e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 106244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 106344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor llvm::ConstantInt::get(Ty, 0x07C8), CFRD, STy); 1064c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1065c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 106644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CurField = NextField; 106744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextField = *Field++; 10683e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *C = llvm::ConstantArray::get(str); 1069c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson C = new llvm::GlobalVariable(C->getType(), true, 1070c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson llvm::GlobalValue::InternalLinkage, 1071e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson C, ".str", &getModule()); 107244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 1073e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson llvm::ConstantExpr::getGetElementPtr(C, Zeros, 2), 1074e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson CFRD, STy); 1075c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1076c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 107744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor CurField = NextField; 107844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor NextField = 0; 1079c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 108044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor appendFieldAndPadding(*this, Fields, CurField, NextField, 108144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor llvm::ConstantInt::get(Ty, str.length()), CFRD, STy); 1082c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 1083c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 1084e3daa761061982f2267f7c8fb847ea02abad0aa9Anders Carlsson C = llvm::ConstantStruct::get(STy, Fields); 10850c67829763b98bc670062b553897a851fab17401Anders Carlsson llvm::GlobalVariable *GV = 10860c67829763b98bc670062b553897a851fab17401Anders Carlsson new llvm::GlobalVariable(C->getType(), true, 10870c67829763b98bc670062b553897a851fab17401Anders Carlsson llvm::GlobalVariable::InternalLinkage, 10880c67829763b98bc670062b553897a851fab17401Anders Carlsson C, "", &getModule()); 10893e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 10900c67829763b98bc670062b553897a851fab17401Anders Carlsson GV->setSection("__DATA,__cfstring"); 10910c67829763b98bc670062b553897a851fab17401Anders Carlsson Entry.setValue(GV); 10923e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 10930c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 1094c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 109545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 10966143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 10971e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 10986143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 10991e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const char *StrData = E->getStrData(); 11001e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar unsigned Len = E->getByteLength(); 11011e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 11021e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 11031e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar getContext().getAsConstantArrayType(E->getType()); 11041e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 11051e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 1106dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner // Resize the string to the right size. 11071e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar std::string Str(StrData, StrData+Len); 11081e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 1109dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner 1110dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner if (E->isWide()) 1111dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner RealLen *= getContext().Target.getWCharWidth()/8; 1112dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner 11131e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 11141e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 11151e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 11161e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 11171e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 11186143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 11196143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 11206143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 11216143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 11226143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 11236143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar return GetAddrOfConstantString(GetStringForStringLiteral(S)); 11246143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 11256143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 1126eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant 1127eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner/// array for the given ObjCEncodeExpr node. 1128eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattnerllvm::Constant * 1129eaf2bb89eb2aad3b80673de30febe52df43c10ecChris LattnerCodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { 1130eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner std::string Str; 1131eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner getContext().getObjCEncodingForType(E->getEncodedType(), Str); 1132a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman 1133a210f350fa78c263caa26e0f999cce85bb235309Eli Friedman return GetAddrOfConstantCString(Str); 1134eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner} 1135eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1136eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 1137a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 113845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattnerstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 113945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 11405fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar CodeGenModule &CGM, 11415fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 11426143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 11436143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar llvm::Constant *C = llvm::ConstantArray::get(str, false); 114445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 114545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 1146eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return new llvm::GlobalVariable(C->getType(), constant, 1147eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner llvm::GlobalValue::InternalLinkage, 1148eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner C, GlobalName ? GlobalName : ".str", 1149eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner &CGM.getModule()); 115045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 115145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 11526143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 11536143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 11546143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 11556143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 11566143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 11576143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 11586143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 11596143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 11605fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str, 11615fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName) { 116245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Don't share any string literals if writable-strings is turned on. 116345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Features.WritableStrings) 11645fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar return GenerateStringLiteral(str, false, *this, GlobalName); 116545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 116645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner llvm::StringMapEntry<llvm::Constant *> &Entry = 116745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 116845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 116945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 1170eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return Entry.getValue(); 117145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 117245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 11735fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar llvm::Constant *C = GenerateStringLiteral(str, true, *this, GlobalName); 117445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 117545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 117645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 11776143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 11786143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 11796143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 11806143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 11815fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str, 11825fabf9dbee29464bcd06cd09f8e569d1b850f948Daniel Dunbar const char *GlobalName){ 1183c9f29c61856ffb5f643cedbe87ac076f21a1381aChris Lattner return GetAddrOfConstantString(str + '\0', GlobalName); 11846143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 118541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1186af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 1187af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 1188af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbarvoid CodeGenModule::EmitObjCPropertyImplementations(const 1189af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 1190af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar for (ObjCImplementationDecl::propimpl_iterator i = D->propimpl_begin(), 1191af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar e = D->propimpl_end(); i != e; ++i) { 1192af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 1193af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1194af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 1195af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 1196af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 1197af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 1198af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 1199af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 1200af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 1201af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 1202af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 1203af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!D->getInstanceMethod(PD->getGetterName())) 1204fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCGetter( 1205fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1206af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 1207af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar !D->getInstanceMethod(PD->getSetterName())) 1208fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian CodeGenFunction(*this).GenerateObjCSetter( 1209fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const_cast<ObjCImplementationDecl *>(D), PID); 1210af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1211af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 1212af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 1213af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 121441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 121541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 121641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 121741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 121841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 121941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 122041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 122141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 122241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 122341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 122441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 122541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar EmitGlobal(cast<ValueDecl>(D)); 122641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 122741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 122841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 1229662174c82ef46b19a2329c7d37208e1d12dfb7b3Daniel Dunbar ErrorUnsupported(D, "namespace"); 123041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 123141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 123241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // Objective-C Decls 123341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 123438e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian // Forward declarations, no (immediate) code generation. 123541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 123641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 123741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 123838e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian 123941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 124038e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian case Decl::ObjCCategory: 124138e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian case Decl::ObjCInterface: { 124238e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian ObjCContainerDecl *OCD = cast<ObjCContainerDecl>(D); 124338e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian for (ObjCContainerDecl::tuvar_iterator i = OCD->tuvar_begin(), 124438e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian e = OCD->tuvar_end(); i != e; ++i) { 124538e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian VarDecl *VD = *i; 124638e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian EmitGlobal(VD); 124738e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian } 124838e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian if (D->getKind() == Decl::ObjCProtocol) 124938e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 125041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 125138e24c782c17b6058bf61d635747bbde19fb1bc7Fariborz Jahanian } 125241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 125341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 1254af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 1255af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 1256af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 125741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 125841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 125941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1260af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 1261af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 1262af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 1263af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 126441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 1265af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 126641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 126741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 126841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 126941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (OMD->getBody()) 127041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 127141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 127241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 127341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCompatibleAlias: 1274305c658ebce84bb9833fc0e7675554656453b8e8Fariborz Jahanian // compatibility-alias is a directive and has no code gen. 127541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 127641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 127741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::LinkageSpec: { 127841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar LinkageSpecDecl *LSD = cast<LinkageSpecDecl>(D); 127941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (LSD->getLanguage() == LinkageSpecDecl::lang_cxx) 1280488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar ErrorUnsupported(LSD, "linkage spec"); 128141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // FIXME: implement C++ linkage, C linkage works mostly by C 128241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // language reuse already. 128341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 128441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 128541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 128641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 128741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 128841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar std::string AsmString(AD->getAsmString()->getStrData(), 128941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar AD->getAsmString()->getByteLength()); 129041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 129141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 129241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 129341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 129441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 129541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(S + '\n' + AsmString); 129641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 129741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 129841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 129941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar default: 130041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // Make sure we handled everything we should, every other kind is 130141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // a non-top-level decl. FIXME: Would be nice to have an 130241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // isTopLevelDeclKind function. Need to recode Decl::Kind to do 130341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // that easily. 130441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 130541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 130641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 1307