diff options
Diffstat (limited to 'contrib/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp')
| -rw-r--r-- | contrib/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp | 137 |
1 files changed, 123 insertions, 14 deletions
diff --git a/contrib/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp b/contrib/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp index c372bab1eccb..101080b6fe13 100644 --- a/contrib/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp +++ b/contrib/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp @@ -11,6 +11,7 @@ //===----------------------------------------------------------------------===// #include "CodeGenModule.h" +#include "ABIInfo.h" #include "CGBlocks.h" #include "CGCUDARuntime.h" #include "CGCXXABI.h" @@ -32,7 +33,6 @@ #include "clang/AST/DeclObjC.h" #include "clang/AST/DeclTemplate.h" #include "clang/AST/Mangle.h" -#include "clang/AST/RecordLayout.h" #include "clang/AST/RecursiveASTVisitor.h" #include "clang/AST/StmtVisitor.h" #include "clang/Basic/Builtins.h" @@ -58,6 +58,7 @@ #include "llvm/IR/Module.h" #include "llvm/IR/ProfileSummary.h" #include "llvm/ProfileData/InstrProfReader.h" +#include "llvm/Support/CRC.h" #include "llvm/Support/CodeGen.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/ConvertUTF.h" @@ -136,6 +137,13 @@ CodeGenModule::CodeGenModule(ASTContext &C, const HeaderSearchOptions &HSO, GlobalsInt8PtrTy = Int8Ty->getPointerTo(DL.getDefaultGlobalsAddressSpace()); ASTAllocaAddressSpace = getTargetCodeGenInfo().getASTAllocaAddressSpace(); + // Build C++20 Module initializers. + // TODO: Add Microsoft here once we know the mangling required for the + // initializers. + CXX20ModuleInits = + LangOpts.CPlusPlusModules && getCXXABI().getMangleContext().getKind() == + ItaniumMangleContext::MK_Itanium; + RuntimeCC = getTargetCodeGenInfo().getABIInfo().getRuntimeCC(); if (LangOpts.ObjC) @@ -510,6 +518,9 @@ static void setVisibilityFromDLLStorageClass(const clang::LangOptions &LO, } void CodeGenModule::Release() { + Module *Primary = getContext().getModuleForCodeGen(); + if (CXX20ModuleInits && Primary && !Primary->isModuleMapModule()) + EmitModuleInitializers(Primary); EmitDeferred(); DeferredDecls.insert(EmittedDeferredDecls.begin(), EmittedDeferredDecls.end()); @@ -518,7 +529,10 @@ void CodeGenModule::Release() { applyGlobalValReplacements(); applyReplacements(); emitMultiVersionFunctions(); - EmitCXXGlobalInitFunc(); + if (CXX20ModuleInits && Primary && Primary->isInterfaceOrPartition()) + EmitCXXModuleInitFunc(Primary); + else + EmitCXXGlobalInitFunc(); EmitCXXGlobalCleanUpFunc(); registerGlobalDtorsWithAtExit(); EmitCXXThreadLocalInitFunc(); @@ -742,19 +756,22 @@ void CodeGenModule::Release() { if (CodeGenOpts.CFProtectionReturn && Target.checkCFProtectionReturnSupported(getDiags())) { // Indicate that we want to instrument return control flow protection. - getModule().addModuleFlag(llvm::Module::Override, "cf-protection-return", + getModule().addModuleFlag(llvm::Module::Min, "cf-protection-return", 1); } if (CodeGenOpts.CFProtectionBranch && Target.checkCFProtectionBranchSupported(getDiags())) { // Indicate that we want to instrument branch control flow protection. - getModule().addModuleFlag(llvm::Module::Override, "cf-protection-branch", + getModule().addModuleFlag(llvm::Module::Min, "cf-protection-branch", 1); } if (CodeGenOpts.IBTSeal) - getModule().addModuleFlag(llvm::Module::Override, "ibt-seal", 1); + getModule().addModuleFlag(llvm::Module::Min, "ibt-seal", 1); + + if (CodeGenOpts.FunctionReturnThunks) + getModule().addModuleFlag(llvm::Module::Override, "function_return_thunk_extern", 1); // Add module metadata for return address signing (ignoring // non-leaf/all) and stack tagging. These are actually turned on by function @@ -2498,6 +2515,31 @@ static void addLinkOptionsPostorder(CodeGenModule &CGM, Module *Mod, } } +void CodeGenModule::EmitModuleInitializers(clang::Module *Primary) { + // Emit the initializers in the order that sub-modules appear in the + // source, first Global Module Fragments, if present. + if (auto GMF = Primary->getGlobalModuleFragment()) { + for (Decl *D : getContext().getModuleInitializers(GMF)) { + assert(D->getKind() == Decl::Var && "GMF initializer decl is not a var?"); + EmitTopLevelDecl(D); + } + } + // Second any associated with the module, itself. + for (Decl *D : getContext().getModuleInitializers(Primary)) { + // Skip import decls, the inits for those are called explicitly. + if (D->getKind() == Decl::Import) + continue; + EmitTopLevelDecl(D); + } + // Third any associated with the Privat eMOdule Fragment, if present. + if (auto PMF = Primary->getPrivateModuleFragment()) { + for (Decl *D : getContext().getModuleInitializers(PMF)) { + assert(D->getKind() == Decl::Var && "PMF initializer decl is not a var?"); + EmitTopLevelDecl(D); + } + } +} + void CodeGenModule::EmitModuleLinkOptions() { // Collect the set of all of the modules we want to visit to emit link // options, which is essentially the imported modules and all of their @@ -2776,16 +2818,18 @@ bool CodeGenModule::isInNoSanitizeList(SanitizerMask Kind, llvm::Function *Fn, // NoSanitize by function name. if (NoSanitizeL.containsFunction(Kind, Fn->getName())) return true; - // NoSanitize by location. + // NoSanitize by location. Check "mainfile" prefix. + auto &SM = Context.getSourceManager(); + const FileEntry &MainFile = *SM.getFileEntryForID(SM.getMainFileID()); + if (NoSanitizeL.containsMainFile(Kind, MainFile.getName())) + return true; + + // Check "src" prefix. if (Loc.isValid()) return NoSanitizeL.containsLocation(Kind, Loc); // If location is unknown, this may be a compiler-generated function. Assume // it's located in the main file. - auto &SM = Context.getSourceManager(); - if (const auto *MainFile = SM.getFileEntryForID(SM.getMainFileID())) { - return NoSanitizeL.containsFile(Kind, MainFile->getName()); - } - return false; + return NoSanitizeL.containsFile(Kind, MainFile.getName()); } bool CodeGenModule::isInNoSanitizeList(SanitizerMask Kind, @@ -2795,8 +2839,13 @@ bool CodeGenModule::isInNoSanitizeList(SanitizerMask Kind, const auto &NoSanitizeL = getContext().getNoSanitizeList(); if (NoSanitizeL.containsGlobal(Kind, GV->getName(), Category)) return true; + auto &SM = Context.getSourceManager(); + if (NoSanitizeL.containsMainFile( + Kind, SM.getFileEntryForID(SM.getMainFileID())->getName(), Category)) + return true; if (NoSanitizeL.containsLocation(Kind, Loc, Category)) return true; + // Check global type. if (!Ty.isNull()) { // Drill down the array types: if global variable of a fixed type is @@ -2840,8 +2889,8 @@ bool CodeGenModule::imbueXRayAttrs(llvm::Function *Fn, SourceLocation Loc, return true; } -bool CodeGenModule::isProfileInstrExcluded(llvm::Function *Fn, - SourceLocation Loc) const { +bool CodeGenModule::isFunctionBlockedByProfileList(llvm::Function *Fn, + SourceLocation Loc) const { const auto &ProfileList = getContext().getProfileList(); // If the profile list is empty, then instrument everything. if (ProfileList.isEmpty()) @@ -2868,6 +2917,20 @@ bool CodeGenModule::isProfileInstrExcluded(llvm::Function *Fn, return ProfileList.getDefault(); } +bool CodeGenModule::isFunctionBlockedFromProfileInstr( + llvm::Function *Fn, SourceLocation Loc) const { + if (isFunctionBlockedByProfileList(Fn, Loc)) + return true; + + auto NumGroups = getCodeGenOpts().ProfileTotalFunctionGroups; + if (NumGroups > 1) { + auto Group = llvm::crc32(arrayRefFromStringRef(Fn->getName())) % NumGroups; + if (Group != getCodeGenOpts().ProfileSelectedFunctionGroup) + return true; + } + return false; +} + bool CodeGenModule::MustBeEmitted(const ValueDecl *Global) { // Never defer when EmitAllDecls is specified. if (LangOpts.EmitAllDecls) @@ -2903,12 +2966,20 @@ bool CodeGenModule::MayBeEmittedEagerly(const ValueDecl *Global) { // explicitly instantiated, so they should not be emitted eagerly. return false; } - if (const auto *VD = dyn_cast<VarDecl>(Global)) + if (const auto *VD = dyn_cast<VarDecl>(Global)) { if (Context.getInlineVariableDefinitionKind(VD) == ASTContext::InlineVariableDefinitionKind::WeakUnknown) // A definition of an inline constexpr static data member may change // linkage later if it's redeclared outside the class. return false; + if (CXX20ModuleInits && VD->getOwningModule() && + !VD->getOwningModule()->isModuleMapModule()) { + // For CXX20, module-owned initializers need to be deferred, since it is + // not known at this point if they will be run for the current module or + // as part of the initializer for an imported one. + return false; + } + } // If OpenMP is enabled and threadprivates must be generated like TLS, delay // codegen for global variables, because they may be marked as threadprivate. if (LangOpts.OpenMP && LangOpts.OpenMPUseTLS && @@ -6208,6 +6279,16 @@ void CodeGenModule::EmitTopLevelDecl(Decl *D) { DI->EmitImportDecl(*Import); } + // For C++ standard modules we are done - we will call the module + // initializer for imported modules, and that will likewise call those for + // any imports it has. + if (CXX20ModuleInits && Import->getImportedOwningModule() && + !Import->getImportedOwningModule()->isModuleMapModule()) + break; + + // For clang C++ module map modules the initializers for sub-modules are + // emitted here. + // Find all of the submodules and emit the module initializers. llvm::SmallPtrSet<clang::Module *, 16> Visited; SmallVector<clang::Module *, 16> Stack; @@ -6892,3 +6973,31 @@ void CodeGenModule::printPostfixForExternalizedDecl(llvm::raw_ostream &OS, OS << getContext().getCUIDHash(); } } + +void CodeGenModule::moveLazyEmissionStates(CodeGenModule *NewBuilder) { + assert(DeferredDeclsToEmit.empty() && + "Should have emitted all decls deferred to emit."); + assert(NewBuilder->DeferredDecls.empty() && + "Newly created module should not have deferred decls"); + NewBuilder->DeferredDecls = std::move(DeferredDecls); + + assert(NewBuilder->DeferredVTables.empty() && + "Newly created module should not have deferred vtables"); + NewBuilder->DeferredVTables = std::move(DeferredVTables); + + assert(NewBuilder->MangledDeclNames.empty() && + "Newly created module should not have mangled decl names"); + assert(NewBuilder->Manglings.empty() && + "Newly created module should not have manglings"); + NewBuilder->Manglings = std::move(Manglings); + + assert(WeakRefReferences.empty() && "Not all WeakRefRefs have been applied"); + NewBuilder->WeakRefReferences = std::move(WeakRefReferences); + + NewBuilder->TBAA = std::move(TBAA); + + assert(NewBuilder->EmittedDeferredDecls.empty() && + "Still have (unmerged) EmittedDeferredDecls deferred decls"); + + NewBuilder->EmittedDeferredDecls = std::move(EmittedDeferredDecls); +} |