Remove more dead code.

llvm-svn: 262443

lld/include/lld/Core/File.h

@@ -51,7 +51,6 @@ public:
     kindHeaderObject,         ///< a file for file headers
     kindEntryObject,          ///< a file for the entry
     kindUndefinedSymsObject,  ///< a file for undefined symbols
-    kindAliasSymsObject,      ///< a file for alias symbols
     kindStubHelperObject,     ///< a file for stub helpers
     kindResolverMergedObject, ///< the resolver merged file.
     kindSectCreateObject,     ///< a sect create object file (.o)

lld/include/lld/Core/Resolver.h

@@ -32,9 +32,7 @@ class LinkingContext;
 /// and producing a merged graph.
 class Resolver {
 public:
-  Resolver(LinkingContext &ctx)
-      : _ctx(ctx), _symbolTable(), _result(new MergedFile()),
-        _fileIndex(0) {}
+  Resolver(LinkingContext &ctx) : _ctx(ctx), _result(new MergedFile()) {}
 
   // InputFiles::Handler methods
   void doDefinedAtom(const DefinedAtom&);
@@ -69,7 +67,6 @@ private:
   void deadStripOptimize();
   bool checkUndefines();
   void removeCoalescedAwayAtoms();
-  void checkDylibSymbolCollisions();
   ErrorOr<bool> forEachUndefines(File &file, bool searchForOverrides,
                                  UndefCallback callback);
 
@@ -94,7 +91,6 @@ private:
   // --start-group and --end-group
   std::vector<File *> _files;
   std::map<File *, bool> _newUndefinesAdded;
-  size_t _fileIndex;
 
   // List of undefined symbols.
   std::vector<StringRef> _undefines;

lld/include/lld/Core/Simple.h

@@ -17,7 +17,6 @@
 
 #include "lld/Core/DefinedAtom.h"
 #include "lld/Core/File.h"
-#include "lld/Core/ArchiveLibraryFile.h"
 #include "lld/Core/LinkingContext.h"
 #include "lld/Core/Reference.h"
 #include "lld/Core/UndefinedAtom.h"
@@ -81,48 +80,6 @@ private:
   AtomVector<AbsoluteAtom> _absolute;
 };
 
-/// \brief Archive library file that may be used as a virtual container
-/// for symbols that should be added dynamically in response to
-/// call to find() method.
-class SimpleArchiveLibraryFile : public ArchiveLibraryFile {
-public:
-  SimpleArchiveLibraryFile(StringRef filename)
-      : ArchiveLibraryFile(filename) {}
-
-  const AtomVector<DefinedAtom> &defined() const override {
-    return _definedAtoms;
-  }
-
-  const AtomVector<UndefinedAtom> &undefined() const override {
-    return _undefinedAtoms;
-  }
-
-  const AtomVector<SharedLibraryAtom> &sharedLibrary() const override {
-    return _sharedLibraryAtoms;
-  }
-
-  const AtomVector<AbsoluteAtom> &absolute() const override {
-    return _absoluteAtoms;
-  }
-
-  File *find(StringRef sym, bool dataSymbolOnly) override {
-    // For descendants:
-    // do some checks here and return dynamically generated files with atoms.
-    return nullptr;
-  }
-
-  std::error_code
-  parseAllMembers(std::vector<std::unique_ptr<File>> &result) override {
-    return std::error_code();
-  }
-
-private:
-  AtomVector<DefinedAtom> _definedAtoms;
-  AtomVector<UndefinedAtom> _undefinedAtoms;
-  AtomVector<SharedLibraryAtom> _sharedLibraryAtoms;
-  AtomVector<AbsoluteAtom> _absoluteAtoms;
-};
-
 class SimpleReference : public Reference {
 public:
   SimpleReference(Reference::KindNamespace ns, Reference::KindArch arch,
@@ -322,23 +279,6 @@ private:
   StringRef _name;
 };
 
-class SimpleAbsoluteAtom : public AbsoluteAtom {
-public:
-  SimpleAbsoluteAtom(const File &f, StringRef name, Scope s, uint64_t value)
-      : _file(f), _name(name), _scope(s), _value(value) {}
-
-  const File &file() const override { return _file; }
-  StringRef name() const override { return _name; }
-  uint64_t value() const override { return _value; }
-  Scope scope() const override { return _scope; }
-
-private:
-  const File &_file;
-  StringRef _name;
-  Scope _scope;
-  uint64_t _value;
-};
-
 } // end namespace lld
 
 #endif

lld/lib/Core/Resolver.cpp

@@ -264,7 +264,6 @@ bool Resolver::resolveUndefines() {
     case File::kindHeaderObject:
     case File::kindEntryObject:
     case File::kindUndefinedSymsObject:
-    case File::kindAliasSymsObject:
     case File::kindStubHelperObject:
     case File::kindResolverMergedObject:
     case File::kindSectCreateObject: {