Remove dead code.

Now every InputElement has exactly one File in it, so "expand"
method is now no-op.

llvm-svn: 225769

lld/include/lld/Core/InputGraph.h

@@ -63,9 +63,6 @@ public:
   /// \brief Adds a node at the beginning of the InputGraph
   void addInputElementFront(std::unique_ptr<InputElement>);
 
-  /// Normalize the InputGraph. It calls getReplacements() on each element.
-  void normalize();
-
   InputElementVectorT &inputElements() {
     return _inputArgs;
   }
@@ -116,11 +113,6 @@ public:
   /// Get the next file to be processed by the resolver
   virtual File *getNextFile() = 0;
 
-  /// Get the elements that we want to expand with.
-  virtual bool getReplacements(InputGraph::InputElementVectorT &) {
-    return false;
-  }
-
 protected:
   Kind _kind; // The type of the Element
 };
@@ -189,11 +181,10 @@ public:
       _files.push_back(std::move(ai));
   }
 
-  bool getReplacements(InputGraph::InputElementVectorT &result) override;
-
   /// \brief Return the next File thats part of this node to the
   /// resolver.
   File *getNextFile() override {
+    assert(_files.size() == 1);
     if (_nextFileIndex == _files.size())
       return nullptr;
     return _files[_nextFileIndex++].get();

lld/lib/Core/InputGraph.cpp

@@ -49,16 +49,6 @@ InputElement *InputGraph::getNextInputElement() {
   return elem;
 }
 
-void InputGraph::normalize() {
-  std::vector<std::unique_ptr<InputElement>> vec;
-  for (std::unique_ptr<InputElement> &elt : _inputArgs) {
-    if (elt->getReplacements(vec))
-      continue;
-    vec.push_back(std::move(elt));
-  }
-  _inputArgs = std::move(vec);
-}
-
 // If we are at the end of a group, return its size (which indicates
 // how many files we need to go back in the command line).
 // Returns 0 if we are not at the end of a group.
@@ -78,14 +68,6 @@ void InputGraph::skipGroup() {
     _nextElementIndex++;
 }
 
-bool FileNode::getReplacements(InputGraph::InputElementVectorT &result) {
-  if (_files.size() < 2)
-    return false;
-  for (std::unique_ptr<File> &file : _files)
-    result.push_back(llvm::make_unique<SimpleFileNode>(_path, std::move(file)));
-  return true;
-}
-
 std::error_code FileNode::parse(const LinkingContext &, raw_ostream &) {
   for (std::unique_ptr<File> &file : _files)
     if (std::error_code ec = file->parse())

lld/lib/Driver/Driver.cpp

@@ -77,7 +77,6 @@ bool Driver::link(LinkingContext &context, raw_ostream &diagnostics) {
   InputGraph &inputGraph = context.getInputGraph();
   if (!inputGraph.size())
     return false;
-  inputGraph.normalize();
 
   bool fail = false;
 

lld/unittests/DriverTests/InputGraphTest.cpp

@@ -31,13 +31,6 @@ class TestExpandFileNode : public SimpleFileNode {
 public:
   TestExpandFileNode(StringRef path) : SimpleFileNode(path) {}
 
-  /// Returns the elements replacing this node
-  bool getReplacements(InputGraph::InputElementVectorT &result) override {
-    for (std::unique_ptr<InputElement> &elt : _expandElements)
-      result.push_back(std::move(elt));
-    return true;
-  }
-
   void addElement(std::unique_ptr<InputElement> element) {
     _expandElements.push_back(std::move(element));
   }
@@ -88,20 +81,3 @@ TEST_F(InputGraphTest, File) {
   EXPECT_EQ("file1", getNext());
   expectEnd();
 }
-
-// Node expansion tests
-TEST_F(InputGraphTest, Normalize) {
-  _graph->addInputElement(createFile("file1"));
-
-  std::unique_ptr<TestExpandFileNode> expandFile(
-      new TestExpandFileNode("node"));
-  expandFile->addElement(createFile("file2"));
-  expandFile->addElement(createFile("file3"));
-  _graph->addInputElement(std::move(expandFile));
-  _graph->normalize();
-
-  EXPECT_EQ("file1", getNext());
-  EXPECT_EQ("file2", getNext());
-  EXPECT_EQ("file3", getNext());
-  expectEnd();
-}