| //===--- IRGenMangler.cpp - mangling of IRGen symbols ---------------------===// |
| // |
| // This source file is part of the Swift.org open source project |
| // |
| // Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors |
| // Licensed under Apache License v2.0 with Runtime Library Exception |
| // |
| // See https://swift.org/LICENSE.txt for license information |
| // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "IRGenMangler.h" |
| #include "swift/AST/ExistentialLayout.h" |
| #include "swift/AST/IRGenOptions.h" |
| #include "swift/Demangling/ManglingMacros.h" |
| #include "swift/Demangling/Demangle.h" |
| #include "swift/ABI/MetadataValues.h" |
| #include "swift/ClangImporter/ClangModule.h" |
| #include "llvm/Support/SaveAndRestore.h" |
| |
| using namespace swift; |
| using namespace irgen; |
| |
| const char *getManglingForWitness(swift::Demangle::ValueWitnessKind kind) { |
| switch (kind) { |
| #define VALUE_WITNESS(MANGLING, NAME) \ |
| case swift::Demangle::ValueWitnessKind::NAME: return #MANGLING; |
| #include "swift/Demangling/ValueWitnessMangling.def" |
| } |
| llvm_unreachable("not a function witness"); |
| } |
| |
| std::string IRGenMangler::mangleValueWitness(Type type, ValueWitness witness) { |
| beginMangling(); |
| appendType(type); |
| |
| const char *Code = nullptr; |
| switch (witness) { |
| #define GET_MANGLING(ID) \ |
| case ValueWitness::ID: Code = getManglingForWitness(swift::Demangle::ValueWitnessKind::ID); break; |
| GET_MANGLING(InitializeBufferWithCopyOfBuffer) \ |
| GET_MANGLING(Destroy) \ |
| GET_MANGLING(InitializeWithCopy) \ |
| GET_MANGLING(AssignWithCopy) \ |
| GET_MANGLING(InitializeWithTake) \ |
| GET_MANGLING(AssignWithTake) \ |
| GET_MANGLING(InitializeBufferWithTakeOfBuffer) \ |
| GET_MANGLING(GetEnumTagSinglePayload) \ |
| GET_MANGLING(StoreEnumTagSinglePayload) \ |
| GET_MANGLING(StoreExtraInhabitant) \ |
| GET_MANGLING(GetExtraInhabitantIndex) \ |
| GET_MANGLING(GetEnumTag) \ |
| GET_MANGLING(DestructiveProjectEnumData) \ |
| GET_MANGLING(DestructiveInjectEnumTag) |
| #undef GET_MANGLING |
| case ValueWitness::Size: |
| case ValueWitness::Flags: |
| case ValueWitness::Stride: |
| case ValueWitness::ExtraInhabitantFlags: |
| llvm_unreachable("not a function witness"); |
| } |
| appendOperator("w", Code); |
| return finalize(); |
| } |
| |
| std::string IRGenMangler::manglePartialApplyForwarder(StringRef FuncName) { |
| if (FuncName.empty()) { |
| beginMangling(); |
| } else { |
| if (FuncName.startswith(MANGLING_PREFIX_STR)) { |
| Buffer << FuncName; |
| } else { |
| beginMangling(); |
| appendIdentifier(FuncName); |
| } |
| } |
| appendOperator("TA"); |
| return finalize(); |
| } |
| |
| SymbolicMangling |
| IRGenMangler::mangleTypeForReflection(IRGenModule &IGM, |
| Type Ty, |
| ModuleDecl *Module, |
| bool isSingleFieldOfBox) { |
| Mod = Module; |
| OptimizeProtocolNames = false; |
| |
| llvm::SaveAndRestore<std::function<bool (const DeclContext *)>> |
| SymbolicReferencesForLocalTypes(CanSymbolicReference); |
| |
| if (IGM.CurSourceFile |
| && !isa<ClangModuleUnit>(IGM.CurSourceFile) |
| && !IGM.getOptions().IntegratedREPL) { |
| CanSymbolicReference = [&](const DeclContext *dc) -> bool { |
| // Symbolically reference types that are defined in the same file unit |
| // as we're referencing from. |
| // |
| // We could eventually improve this to reference any type that ends |
| // up with its nominal type descriptor in the same linked binary as us, |
| // but IRGen doesn't know that with much certainty currently. |
| return dc->getModuleScopeContext() == IGM.CurSourceFile |
| && isa<NominalTypeDecl>(dc) |
| && !isa<ProtocolDecl>(dc); |
| }; |
| } |
| |
| SymbolicReferences.clear(); |
| |
| appendType(Ty); |
| if (isSingleFieldOfBox) |
| appendOperator("Xb"); |
| |
| return {finalize(), std::move(SymbolicReferences)}; |
| } |
| |
| std::string IRGenMangler::mangleTypeForLLVMTypeName(CanType Ty) { |
| // To make LLVM IR more readable we always add a 'T' prefix so that type names |
| // don't start with a digit and don't need to be quoted. |
| Buffer << 'T'; |
| if (auto P = dyn_cast<ProtocolType>(Ty)) { |
| appendProtocolName(P->getDecl(), /*allowStandardSubstitution=*/false); |
| appendOperator("P"); |
| } else { |
| appendType(Ty); |
| } |
| return finalize(); |
| } |
| |
| std::string IRGenMangler:: |
| mangleProtocolForLLVMTypeName(ProtocolCompositionType *type) { |
| ExistentialLayout layout = type->getExistentialLayout(); |
| |
| if (type->isAny()) { |
| Buffer << "Any"; |
| } else if (layout.isAnyObject()) { |
| Buffer << "AnyObject"; |
| } else { |
| // To make LLVM IR more readable we always add a 'T' prefix so that type names |
| // don't start with a digit and don't need to be quoted. |
| Buffer << 'T'; |
| auto protocols = layout.getProtocols(); |
| for (unsigned i = 0, e = protocols.size(); i != e; ++i) { |
| appendProtocolName(protocols[i]->getDecl()); |
| if (i == 0) |
| appendOperator("_"); |
| } |
| if (layout.superclass) { |
| auto superclassTy = layout.superclass; |
| |
| // We share type infos for different instantiations of a generic type |
| // when the archetypes have the same exemplars. We cannot mangle |
| // archetypes, and the mangling does not have to be unique, so we just |
| // mangle the unbound generic form of the type. |
| if (superclassTy->hasArchetype()) { |
| superclassTy = superclassTy->getClassOrBoundGenericClass() |
| ->getDeclaredType(); |
| } |
| |
| appendType(CanType(superclassTy)); |
| appendOperator("Xc"); |
| } else if (layout.getLayoutConstraint()) { |
| appendOperator("Xl"); |
| } else { |
| appendOperator("p"); |
| } |
| } |
| return finalize(); |
| } |
| |
| std::string IRGenMangler:: |
| mangleSymbolNameForSymbolicMangling(const SymbolicMangling &mangling) { |
| beginManglingWithoutPrefix(); |
| static const char prefix[] = "symbolic "; |
| Buffer << prefix << mangling.String; |
| auto prefixLen = sizeof(prefix) - 1; |
| |
| for (auto &symbol : mangling.SymbolicReferences) { |
| // Fill in the placeholder space with something printable. |
| auto dc = symbol.first; |
| auto offset = symbol.second; |
| Storage[prefixLen + offset] = Storage[prefixLen + offset+1] = |
| Storage[prefixLen + offset+2] = Storage[prefixLen + offset+3] = '_'; |
| Buffer << ' '; |
| appendContext(dc); |
| } |
| |
| return finalize(); |
| } |