forked from OSchip/llvm-project
275 lines
7.2 KiB
C++
275 lines
7.2 KiB
C++
//===--- Module.h - Describe a module ---------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the Module class, which describes a module in the source
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// code.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Basic/Module.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/LangOptions.h"
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#include "clang/Basic/TargetInfo.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringSwitch.h"
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using namespace clang;
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Module::Module(StringRef Name, SourceLocation DefinitionLoc, Module *Parent,
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bool IsFramework, bool IsExplicit)
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: Name(Name), DefinitionLoc(DefinitionLoc), Parent(Parent),
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Umbrella(), IsAvailable(true), IsFromModuleFile(false),
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IsFramework(IsFramework), IsExplicit(IsExplicit), IsSystem(false),
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InferSubmodules(false), InferExplicitSubmodules(false),
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InferExportWildcard(false), NameVisibility(Hidden)
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{
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if (Parent) {
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if (!Parent->isAvailable())
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IsAvailable = false;
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if (Parent->IsSystem)
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IsSystem = true;
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Parent->SubModuleIndex[Name] = Parent->SubModules.size();
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Parent->SubModules.push_back(this);
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}
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}
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Module::~Module() {
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for (submodule_iterator I = submodule_begin(), IEnd = submodule_end();
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I != IEnd; ++I) {
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delete *I;
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}
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}
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/// \brief Determine whether a translation unit built using the current
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/// language options has the given feature.
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static bool hasFeature(StringRef Feature, const LangOptions &LangOpts,
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const TargetInfo &Target) {
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return llvm::StringSwitch<bool>(Feature)
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.Case("altivec", LangOpts.AltiVec)
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.Case("blocks", LangOpts.Blocks)
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.Case("cplusplus", LangOpts.CPlusPlus)
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.Case("cplusplus11", LangOpts.CPlusPlus0x)
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.Case("objc", LangOpts.ObjC1)
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.Case("objc_arc", LangOpts.ObjCAutoRefCount)
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.Case("opencl", LangOpts.OpenCL)
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.Case("tls", Target.isTLSSupported())
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.Default(Target.hasFeature(Feature));
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}
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bool
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Module::isAvailable(const LangOptions &LangOpts, const TargetInfo &Target,
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StringRef &Feature) const {
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if (IsAvailable)
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return true;
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for (const Module *Current = this; Current; Current = Current->Parent) {
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for (unsigned I = 0, N = Current->Requires.size(); I != N; ++I) {
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if (!hasFeature(Current->Requires[I], LangOpts, Target)) {
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Feature = Current->Requires[I];
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return false;
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}
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}
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}
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llvm_unreachable("could not find a reason why module is unavailable");
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}
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bool Module::isSubModuleOf(Module *Other) const {
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const Module *This = this;
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do {
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if (This == Other)
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return true;
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This = This->Parent;
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} while (This);
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return false;
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}
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const Module *Module::getTopLevelModule() const {
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const Module *Result = this;
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while (Result->Parent)
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Result = Result->Parent;
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return Result;
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}
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std::string Module::getFullModuleName() const {
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llvm::SmallVector<StringRef, 2> Names;
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// Build up the set of module names (from innermost to outermost).
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for (const Module *M = this; M; M = M->Parent)
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Names.push_back(M->Name);
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std::string Result;
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for (llvm::SmallVector<StringRef, 2>::reverse_iterator I = Names.rbegin(),
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IEnd = Names.rend();
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I != IEnd; ++I) {
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if (!Result.empty())
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Result += '.';
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Result += *I;
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}
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return Result;
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}
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const DirectoryEntry *Module::getUmbrellaDir() const {
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if (const FileEntry *Header = getUmbrellaHeader())
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return Header->getDir();
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return Umbrella.dyn_cast<const DirectoryEntry *>();
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}
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void Module::addRequirement(StringRef Feature, const LangOptions &LangOpts,
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const TargetInfo &Target) {
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Requires.push_back(Feature);
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// If this feature is currently available, we're done.
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if (hasFeature(Feature, LangOpts, Target))
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return;
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if (!IsAvailable)
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return;
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llvm::SmallVector<Module *, 2> Stack;
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Stack.push_back(this);
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while (!Stack.empty()) {
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Module *Current = Stack.back();
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Stack.pop_back();
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if (!Current->IsAvailable)
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continue;
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Current->IsAvailable = false;
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for (submodule_iterator Sub = Current->submodule_begin(),
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SubEnd = Current->submodule_end();
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Sub != SubEnd; ++Sub) {
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if ((*Sub)->IsAvailable)
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Stack.push_back(*Sub);
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}
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}
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}
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Module *Module::findSubmodule(StringRef Name) const {
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llvm::StringMap<unsigned>::const_iterator Pos = SubModuleIndex.find(Name);
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if (Pos == SubModuleIndex.end())
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return 0;
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return SubModules[Pos->getValue()];
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}
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static void printModuleId(llvm::raw_ostream &OS, const ModuleId &Id) {
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for (unsigned I = 0, N = Id.size(); I != N; ++I) {
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if (I)
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OS << ".";
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OS << Id[I].first;
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}
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}
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void Module::print(llvm::raw_ostream &OS, unsigned Indent) const {
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OS.indent(Indent);
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if (IsFramework)
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OS << "framework ";
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if (IsExplicit)
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OS << "explicit ";
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OS << "module " << Name;
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if (IsSystem) {
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OS.indent(Indent + 2);
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OS << " [system]";
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}
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OS << " {\n";
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if (!Requires.empty()) {
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OS.indent(Indent + 2);
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OS << "requires ";
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for (unsigned I = 0, N = Requires.size(); I != N; ++I) {
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if (I)
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OS << ", ";
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OS << Requires[I];
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}
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OS << "\n";
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}
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if (const FileEntry *UmbrellaHeader = getUmbrellaHeader()) {
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OS.indent(Indent + 2);
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OS << "umbrella header \"";
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OS.write_escaped(UmbrellaHeader->getName());
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OS << "\"\n";
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} else if (const DirectoryEntry *UmbrellaDir = getUmbrellaDir()) {
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OS.indent(Indent + 2);
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OS << "umbrella \"";
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OS.write_escaped(UmbrellaDir->getName());
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OS << "\"\n";
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}
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for (unsigned I = 0, N = Headers.size(); I != N; ++I) {
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OS.indent(Indent + 2);
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OS << "header \"";
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OS.write_escaped(Headers[I]->getName());
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OS << "\"\n";
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}
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for (submodule_const_iterator MI = submodule_begin(), MIEnd = submodule_end();
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MI != MIEnd; ++MI)
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(*MI)->print(OS, Indent + 2);
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for (unsigned I = 0, N = Exports.size(); I != N; ++I) {
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OS.indent(Indent + 2);
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OS << "export ";
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if (Module *Restriction = Exports[I].getPointer()) {
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OS << Restriction->getFullModuleName();
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if (Exports[I].getInt())
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OS << ".*";
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} else {
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OS << "*";
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}
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OS << "\n";
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}
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for (unsigned I = 0, N = UnresolvedExports.size(); I != N; ++I) {
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OS.indent(Indent + 2);
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OS << "export ";
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printModuleId(OS, UnresolvedExports[I].Id);
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if (UnresolvedExports[I].Wildcard) {
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if (UnresolvedExports[I].Id.empty())
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OS << "*";
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else
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OS << ".*";
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}
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OS << "\n";
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}
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if (InferSubmodules) {
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OS.indent(Indent + 2);
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if (InferExplicitSubmodules)
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OS << "explicit ";
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OS << "module * {\n";
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if (InferExportWildcard) {
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OS.indent(Indent + 4);
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OS << "export *\n";
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}
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OS.indent(Indent + 2);
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OS << "}\n";
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}
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OS.indent(Indent);
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OS << "}\n";
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}
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void Module::dump() const {
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print(llvm::errs());
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}
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