/// identifier.
unsigned NumIdentifierLookupHits;
- /// \brief The number of modules provided via skip sets.
- unsigned NumIdentifierModulesSkipped;
-
/// \brief Internal constructor. Use \c readIndex() to read an index.
explicit GlobalModuleIndex(FileManager &FileMgr, llvm::MemoryBuffer *Buffer,
llvm::BitstreamCursor Cursor);
void getModuleDependencies(const FileEntry *ModuleFile,
SmallVectorImpl<const FileEntry *> &Dependencies);
+ /// \brief A set of module files in which we found a result.
+ typedef llvm::SmallPtrSet<const FileEntry *, 4> HitSet;
+
/// \brief Look for all of the module files with a namespace-scope binding
/// for the given identifier, e.g., a global function, variable, or type with
/// that name, or declare a method with the selector.
///
/// \param Name The identifier to look for.
///
- /// \param ModuleFiles Will be populated with the list of module
+ /// \param Hits Will be populated with the set of module
/// files that declare entities with the given name.
///
- /// \returns true if any module files were found, false otherwise.
- bool lookupIdentifier(StringRef Name,
- SmallVectorImpl<const FileEntry *> &ModuleFiles);
-
- /// \brief A set of module files into which name lookup can be skipped,
- /// because they are known not to contain any bindings for the given name.
- typedef llvm::SmallPtrSet<const FileEntry *, 16> SkipSet;
-
- /// \brief Compute the "skip set", meaning those known modules that do not
- /// have some particular property.
- ///
- /// \param ModuleFiles The set of module files that has some property.
- ///
- /// \returns The set of known modules that do not have the property exhibited
- /// by the files in \p ModuleFiles.
- SkipSet computeSkipSet(const SmallVectorImpl<const FileEntry *> &ModuleFiles);
+ /// \returns true if the identifier is known to the index, false otherwise.
+ bool lookupIdentifier(StringRef Name, HitSet &Hits);
/// \brief Print statistics to standard error.
void printStats();
namespace clang {
+class GlobalModuleIndex;
+
namespace serialization {
/// \brief Manages the set of modules loaded by an AST reader.
/// \brief The visitation order.
SmallVector<ModuleFile *, 4> VisitOrder;
+ /// \brief The list of module files that both we and the global module index
+ /// know about.
+ ///
+ /// Either the global index or the module manager may have modules that the
+ /// other does not know about, because the global index can be out-of-date
+ /// (in which case the module manager could have modules it does not) and
+ /// this particular translation unit might not have loaded all of the modules
+ /// known to the global index.
+ SmallVector<ModuleFile *, 4> ModulesInCommonWithGlobalIndex;
+
+ /// \brief The global module index, if one is attached.
+ ///
+ /// The global module index will actually be owned by the ASTReader; this is
+ /// just an non-owning pointer.
+ GlobalModuleIndex *GlobalIndex;
+
+ /// \brief Update the set of modules files we know about known to the global index.
+ void updateModulesInCommonWithGlobalIndex();
+
public:
typedef SmallVector<ModuleFile*, 2>::iterator ModuleIterator;
typedef SmallVector<ModuleFile*, 2>::const_iterator ModuleConstIterator;
/// \brief Add an in-memory buffer the list of known buffers
void addInMemoryBuffer(StringRef FileName, llvm::MemoryBuffer *Buffer);
-
+
+ /// \brief Set the global module index.
+ void setGlobalIndex(GlobalModuleIndex *Index);
+
/// \brief Visit each of the modules.
///
/// This routine visits each of the modules, starting with the
///
/// \param UserData User data associated with the visitor object, which
/// will be passed along to the visitor.
- void visit(bool (*Visitor)(ModuleFile &M, void *UserData), void *UserData);
+ ///
+ /// \param ModuleFilesHit If non-NULL, contains the set of module files
+ /// that we know we need to visit because the global module index told us to.
+ /// Any module that is known to both the global module index and the module
+ /// manager that is *not* in this set can be skipped.
+ void visit(bool (*Visitor)(ModuleFile &M, void *UserData), void *UserData,
+ llvm::SmallPtrSet<const FileEntry *, 4> *ModuleFilesHit = 0);
/// \brief Visit each of the modules with a depth-first traversal.
///
class IdentifierLookupVisitor {
StringRef Name;
unsigned PriorGeneration;
- GlobalModuleIndex::SkipSet &SkipSet;
unsigned &NumIdentifierLookups;
unsigned &NumIdentifierLookupHits;
IdentifierInfo *Found;
public:
IdentifierLookupVisitor(StringRef Name, unsigned PriorGeneration,
- GlobalModuleIndex::SkipSet &SkipSet,
unsigned &NumIdentifierLookups,
unsigned &NumIdentifierLookupHits)
- : Name(Name), PriorGeneration(PriorGeneration), SkipSet(SkipSet),
+ : Name(Name), PriorGeneration(PriorGeneration),
NumIdentifierLookups(NumIdentifierLookups),
NumIdentifierLookupHits(NumIdentifierLookupHits),
Found()
if (M.Generation <= This->PriorGeneration)
return true;
- // If this module file is in the skip set, don't bother looking in it.
- if (This->SkipSet.count(M.File))
- return false;
-
ASTIdentifierLookupTable *IdTable
= (ASTIdentifierLookupTable *)M.IdentifierLookupTable;
if (!IdTable)
// If there is a global index, look there first to determine which modules
// provably do not have any results for this identifier.
- GlobalModuleIndex::SkipSet SkipSet;
+ GlobalModuleIndex::HitSet Hits;
+ GlobalModuleIndex::HitSet *HitsPtr = 0;
if (!loadGlobalIndex()) {
- SmallVector<const FileEntry *, 4> ModuleFiles;
- if (GlobalIndex->lookupIdentifier(II.getName(), ModuleFiles)) {
- SkipSet = GlobalIndex->computeSkipSet(ModuleFiles);
+ if (GlobalIndex->lookupIdentifier(II.getName(), Hits)) {
+ HitsPtr = &Hits;
}
}
- IdentifierLookupVisitor Visitor(II.getName(), PriorGeneration, SkipSet,
+ IdentifierLookupVisitor Visitor(II.getName(), PriorGeneration,
NumIdentifierLookups,
NumIdentifierLookupHits);
- ModuleMgr.visit(IdentifierLookupVisitor::visit, &Visitor);
+ ModuleMgr.visit(IdentifierLookupVisitor::visit, &Visitor, HitsPtr);
markIdentifierUpToDate(&II);
}
return true;
GlobalIndex.reset(Result.first);
+ ModuleMgr.setGlobalIndex(GlobalIndex.get());
return false;
}
// If we find that any modules are unusable, the global index is going
// to be out-of-date. Just remove it.
GlobalIndex.reset();
+ ModuleMgr.setGlobalIndex(0);
return ReadResult;
case Success:
// If there is a global index, look there first to determine which modules
// provably do not have any results for this identifier.
- GlobalModuleIndex::SkipSet SkipSet;
+ GlobalModuleIndex::HitSet Hits;
+ GlobalModuleIndex::HitSet *HitsPtr = 0;
if (!loadGlobalIndex()) {
- SmallVector<const FileEntry *, 4> ModuleFiles;
- if (GlobalIndex->lookupIdentifier(Name, ModuleFiles)) {
- SkipSet = GlobalIndex->computeSkipSet(ModuleFiles);
+ if (GlobalIndex->lookupIdentifier(Name, Hits)) {
+ HitsPtr = &Hits;
}
}
- IdentifierLookupVisitor Visitor(Name, /*PriorGeneration=*/0, SkipSet,
+ IdentifierLookupVisitor Visitor(Name, /*PriorGeneration=*/0,
NumIdentifierLookups,
NumIdentifierLookupHits);
- ModuleMgr.visit(IdentifierLookupVisitor::visit, &Visitor);
+ ModuleMgr.visit(IdentifierLookupVisitor::visit, &Visitor, HitsPtr);
IdentifierInfo *II = Visitor.getIdentifierInfo();
markIdentifierUpToDate(II);
return II;
GlobalModuleIndex::GlobalModuleIndex(FileManager &FileMgr,
llvm::MemoryBuffer *Buffer,
llvm::BitstreamCursor Cursor)
- : Buffer(Buffer), IdentifierIndex()
+ : Buffer(Buffer), IdentifierIndex(),
+ NumIdentifierLookups(), NumIdentifierLookupHits()
{
typedef llvm::DenseMap<unsigned, LoadedModuleInfo> LoadedModulesMap;
LoadedModulesMap LoadedModules;
Dependencies = Modules[Known->second].Dependencies;
}
-bool GlobalModuleIndex::lookupIdentifier(
- StringRef Name,
- SmallVectorImpl<const FileEntry *> &ModuleFiles) {
- ModuleFiles.clear();
+bool GlobalModuleIndex::lookupIdentifier(StringRef Name, HitSet &Hits) {
+ Hits.clear();
// If there's no identifier index, there is nothing we can do.
if (!IdentifierIndex)
if (ID >= Modules.size() || !Modules[ID].File)
continue;
- ModuleFiles.push_back(Modules[ID].File);
+ Hits.insert(Modules[ID].File);
}
++NumIdentifierLookupHits;
return true;
}
-GlobalModuleIndex::SkipSet
-GlobalModuleIndex::computeSkipSet(
- const SmallVectorImpl<const FileEntry *> &ModuleFiles) {
- llvm::SmallPtrSet<const FileEntry *, 8> Found(ModuleFiles.begin(),
- ModuleFiles.end());
-
- SkipSet Result;
- for (unsigned I = 0, N = Modules.size(); I != N; ++I) {
- if (Modules[I].File && !Found.count(Modules[I].File))
- Result.insert(Modules[I].File);
- }
-
- NumIdentifierModulesSkipped += Result.size();
- return Result;
-}
-
void GlobalModuleIndex::printStats() {
std::fprintf(stderr, "*** Global Module Index Statistics:\n");
if (NumIdentifierLookups) {
NumIdentifierLookupHits, NumIdentifierLookups,
(double)NumIdentifierLookupHits*100.0/NumIdentifierLookups);
}
- if (NumIdentifierLookups && NumIdentifierModulesSkipped) {
- fprintf(stderr, " %f modules skipped per lookup (on average)\n",
- (double)NumIdentifierModulesSkipped/NumIdentifierLookups);
- }
std::fprintf(stderr, "\n");
}
//
//===----------------------------------------------------------------------===//
#include "clang/Serialization/ModuleManager.h"
+#include "clang/Serialization/GlobalModuleIndex.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/system_error.h"
InMemoryBuffers[Entry] = Buffer;
}
-ModuleManager::ModuleManager(FileManager &FileMgr) : FileMgr(FileMgr) { }
+void ModuleManager::updateModulesInCommonWithGlobalIndex() {
+ ModulesInCommonWithGlobalIndex.clear();
+
+ if (!GlobalIndex)
+ return;
+
+ // Collect the set of modules known to the global index.
+ SmallVector<const FileEntry *, 16> KnownModules;
+ GlobalIndex->getKnownModules(KnownModules);
+
+ // Map those modules to AST files known to the module manager.
+ for (unsigned I = 0, N = KnownModules.size(); I != N; ++I) {
+ llvm::DenseMap<const FileEntry *, ModuleFile *>::iterator Known
+ = Modules.find(KnownModules[I]);
+ if (Known == Modules.end())
+ continue;
+
+ ModulesInCommonWithGlobalIndex.push_back(Known->second);
+ }
+}
+
+void ModuleManager::setGlobalIndex(GlobalModuleIndex *Index) {
+ GlobalIndex = Index;
+ updateModulesInCommonWithGlobalIndex();
+}
+
+ModuleManager::ModuleManager(FileManager &FileMgr)
+ : FileMgr(FileMgr), GlobalIndex() { }
ModuleManager::~ModuleManager() {
for (unsigned i = 0, e = Chain.size(); i != e; ++i)
delete Chain[e - i - 1];
}
-void ModuleManager::visit(bool (*Visitor)(ModuleFile &M, void *UserData),
- void *UserData) {
- // If the visitation number array is the wrong size, resize it and recompute
- // an order.
+void
+ModuleManager::visit(bool (*Visitor)(ModuleFile &M, void *UserData),
+ void *UserData,
+ llvm::SmallPtrSet<const FileEntry *, 4> *ModuleFilesHit) {
+ // If the visitation order vector is the wrong size, recompute the order.
if (VisitOrder.size() != Chain.size()) {
unsigned N = size();
VisitOrder.clear();
}
assert(VisitOrder.size() == N && "Visitation order is wrong?");
+
+ // We may need to update the set of modules we have in common with the
+ // global module index, since modules could have been added to the module
+ // manager since we loaded the global module index.
+ updateModulesInCommonWithGlobalIndex();
}
SmallVector<ModuleFile *, 4> Stack;
SmallVector<bool, 4> Visited(size(), false);
+ // If the caller has provided us with a hit-set that came from the global
+ // module index, mark every module file in common with the global module
+ // index that is *not* in that set as 'visited'.
+ if (ModuleFilesHit && !ModulesInCommonWithGlobalIndex.empty()) {
+ for (unsigned I = 0, N = ModulesInCommonWithGlobalIndex.size(); I != N; ++I)
+ {
+ ModuleFile *M = ModulesInCommonWithGlobalIndex[I];
+ if (!ModuleFilesHit->count(M->File))
+ Visited[M->Index] = true;
+ }
+ }
+
for (unsigned I = 0, N = VisitOrder.size(); I != N; ++I) {
ModuleFile *CurrentModule = VisitOrder[I];
// Should we skip this module file?
projects / clang / commitdiff