Update prebuilt Clang to r353983e.HEADq10.0

clang 9.0.5 (based on r353983e) from build 5696680.

Bug: http://b/135931688
Bug: http://b/136008926
Test: N/A
Change-Id: I922d17410047d2e2df4625615352c588ee71b203

1 files changed, 379 insertions, 0 deletions

diff --git a/clang-r353983e/include/llvm/Support/GraphWriter.h b/clang-r353983e/include/llvm/Support/GraphWriter.h
new file mode 100644
index 00000000..466a0449
--- /dev/null
+++ b/clang-r353983e/include/llvm/Support/GraphWriter.h
@@ -0,0 +1,379 @@
+//===- llvm/Support/GraphWriter.h - Write graph to a .dot file --*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines a simple interface that can be used to print out generic
+// LLVM graphs to ".dot" files.  "dot" is a tool that is part of the AT&T
+// graphviz package (http://www.research.att.com/sw/tools/graphviz/) which can
+// be used to turn the files output by this interface into a variety of
+// different graphics formats.
+//
+// Graphs do not need to implement any interface past what is already required
+// by the GraphTraits template, but they can choose to implement specializations
+// of the DOTGraphTraits template if they want to customize the graphs output in
+// any way.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_GRAPHWRITER_H
+#define LLVM_SUPPORT_GRAPHWRITER_H
+
+#include "llvm/ADT/GraphTraits.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/DOTGraphTraits.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/raw_ostream.h"
+#include <algorithm>
+#include <cstddef>
+#include <iterator>
+#include <string>
+#include <type_traits>
+#include <vector>
+
+namespace llvm {
+
+namespace DOT {  // Private functions...
+
+std::string EscapeString(const std::string &Label);
+
+/// Get a color string for this node number. Simply round-robin selects
+/// from a reasonable number of colors.
+StringRef getColorString(unsigned NodeNumber);
+
+} // end namespace DOT
+
+namespace GraphProgram {
+
+enum Name {
+  DOT,
+  FDP,
+  NEATO,
+  TWOPI,
+  CIRCO
+};
+
+} // end namespace GraphProgram
+
+bool DisplayGraph(StringRef Filename, bool wait = true,
+                  GraphProgram::Name program = GraphProgram::DOT);
+
+template<typename GraphType>
+class GraphWriter {
+  raw_ostream &O;
+  const GraphType &G;
+
+  using DOTTraits = DOTGraphTraits<GraphType>;
+  using GTraits = GraphTraits<GraphType>;
+  using NodeRef = typename GTraits::NodeRef;
+  using node_iterator = typename GTraits::nodes_iterator;
+  using child_iterator = typename GTraits::ChildIteratorType;
+  DOTTraits DTraits;
+
+  static_assert(std::is_pointer<NodeRef>::value,
+                "FIXME: Currently GraphWriter requires the NodeRef type to be "
+                "a pointer.\nThe pointer usage should be moved to "
+                "DOTGraphTraits, and removed from GraphWriter itself.");
+
+  // Writes the edge labels of the node to O and returns true if there are any
+  // edge labels not equal to the empty string "".
+  bool getEdgeSourceLabels(raw_ostream &O, NodeRef Node) {
+    child_iterator EI = GTraits::child_begin(Node);
+    child_iterator EE = GTraits::child_end(Node);
+    bool hasEdgeSourceLabels = false;
+
+    for (unsigned i = 0; EI != EE && i != 64; ++EI, ++i) {
+      std::string label = DTraits.getEdgeSourceLabel(Node, EI);
+
+      if (label.empty())
+        continue;
+
+      hasEdgeSourceLabels = true;
+
+      if (i)
+        O << "|";
+
+      O << "<s" << i << ">" << DOT::EscapeString(label);
+    }
+
+    if (EI != EE && hasEdgeSourceLabels)
+      O << "|<s64>truncated...";
+
+    return hasEdgeSourceLabels;
+  }
+
+public:
+  GraphWriter(raw_ostream &o, const GraphType &g, bool SN) : O(o), G(g) {
+    DTraits = DOTTraits(SN);
+  }
+
+  void writeGraph(const std::string &Title = "") {
+    // Output the header for the graph...
+    writeHeader(Title);
+
+    // Emit all of the nodes in the graph...
+    writeNodes();
+
+    // Output any customizations on the graph
+    DOTGraphTraits<GraphType>::addCustomGraphFeatures(G, *this);
+
+    // Output the end of the graph
+    writeFooter();
+  }
+
+  void writeHeader(const std::string &Title) {
+    std::string GraphName = DTraits.getGraphName(G);
+
+    if (!Title.empty())
+      O << "digraph \"" << DOT::EscapeString(Title) << "\" {\n";
+    else if (!GraphName.empty())
+      O << "digraph \"" << DOT::EscapeString(GraphName) << "\" {\n";
+    else
+      O << "digraph unnamed {\n";
+
+    if (DTraits.renderGraphFromBottomUp())
+      O << "\trankdir=\"BT\";\n";
+
+    if (!Title.empty())
+      O << "\tlabel=\"" << DOT::EscapeString(Title) << "\";\n";
+    else if (!GraphName.empty())
+      O << "\tlabel=\"" << DOT::EscapeString(GraphName) << "\";\n";
+    O << DTraits.getGraphProperties(G);
+    O << "\n";
+  }
+
+  void writeFooter() {
+    // Finish off the graph
+    O << "}\n";
+  }
+
+  void writeNodes() {
+    // Loop over the graph, printing it out...
+    for (const auto Node : nodes<GraphType>(G))
+      if (!isNodeHidden(Node))
+        writeNode(Node);
+  }
+
+  bool isNodeHidden(NodeRef Node) {
+    return DTraits.isNodeHidden(Node);
+  }
+
+  void writeNode(NodeRef Node) {
+    std::string NodeAttributes = DTraits.getNodeAttributes(Node, G);
+
+    O << "\tNode" << static_cast<const void*>(Node) << " [shape=record,";
+    if (!NodeAttributes.empty()) O << NodeAttributes << ",";
+    O << "label=\"{";
+
+    if (!DTraits.renderGraphFromBottomUp()) {
+      O << DOT::EscapeString(DTraits.getNodeLabel(Node, G));
+
+      // If we should include the address of the node in the label, do so now.
+      std::string Id = DTraits.getNodeIdentifierLabel(Node, G);
+      if (!Id.empty())
+        O << "|" << DOT::EscapeString(Id);
+
+      std::string NodeDesc = DTraits.getNodeDescription(Node, G);
+      if (!NodeDesc.empty())
+        O << "|" << DOT::EscapeString(NodeDesc);
+    }
+
+    std::string edgeSourceLabels;
+    raw_string_ostream EdgeSourceLabels(edgeSourceLabels);
+    bool hasEdgeSourceLabels = getEdgeSourceLabels(EdgeSourceLabels, Node);
+
+    if (hasEdgeSourceLabels) {
+      if (!DTraits.renderGraphFromBottomUp()) O << "|";
+
+      O << "{" << EdgeSourceLabels.str() << "}";
+
+      if (DTraits.renderGraphFromBottomUp()) O << "|";
+    }
+
+    if (DTraits.renderGraphFromBottomUp()) {
+      O << DOT::EscapeString(DTraits.getNodeLabel(Node, G));
+
+      // If we should include the address of the node in the label, do so now.
+      std::string Id = DTraits.getNodeIdentifierLabel(Node, G);
+      if (!Id.empty())
+        O << "|" << DOT::EscapeString(Id);
+
+      std::string NodeDesc = DTraits.getNodeDescription(Node, G);
+      if (!NodeDesc.empty())
+        O << "|" << DOT::EscapeString(NodeDesc);
+    }
+
+    if (DTraits.hasEdgeDestLabels()) {
+      O << "|{";
+
+      unsigned i = 0, e = DTraits.numEdgeDestLabels(Node);
+      for (; i != e && i != 64; ++i) {
+        if (i) O << "|";
+        O << "<d" << i << ">"
+          << DOT::EscapeString(DTraits.getEdgeDestLabel(Node, i));
+      }
+
+      if (i != e)
+        O << "|<d64>truncated...";
+      O << "}";
+    }
+
+    O << "}\"];\n";   // Finish printing the "node" line
+
+    // Output all of the edges now
+    child_iterator EI = GTraits::child_begin(Node);
+    child_iterator EE = GTraits::child_end(Node);
+    for (unsigned i = 0; EI != EE && i != 64; ++EI, ++i)
+      if (!DTraits.isNodeHidden(*EI))
+        writeEdge(Node, i, EI);
+    for (; EI != EE; ++EI)
+      if (!DTraits.isNodeHidden(*EI))
+        writeEdge(Node, 64, EI);
+  }
+
+  void writeEdge(NodeRef Node, unsigned edgeidx, child_iterator EI) {
+    if (NodeRef TargetNode = *EI) {
+      int DestPort = -1;
+      if (DTraits.edgeTargetsEdgeSource(Node, EI)) {
+        child_iterator TargetIt = DTraits.getEdgeTarget(Node, EI);
+
+        // Figure out which edge this targets...
+        unsigned Offset =
+          (unsigned)std::distance(GTraits::child_begin(TargetNode), TargetIt);
+        DestPort = static_cast<int>(Offset);
+      }
+
+      if (DTraits.getEdgeSourceLabel(Node, EI).empty())
+        edgeidx = -1;
+
+      emitEdge(static_cast<const void*>(Node), edgeidx,
+               static_cast<const void*>(TargetNode), DestPort,
+               DTraits.getEdgeAttributes(Node, EI, G));
+    }
+  }
+
+  /// emitSimpleNode - Outputs a simple (non-record) node
+  void emitSimpleNode(const void *ID, const std::string &Attr,
+                   const std::string &Label, unsigned NumEdgeSources = 0,
+                   const std::vector<std::string> *EdgeSourceLabels = nullptr) {
+    O << "\tNode" << ID << "[ ";
+    if (!Attr.empty())
+      O << Attr << ",";
+    O << " label =\"";
+    if (NumEdgeSources) O << "{";
+    O << DOT::EscapeString(Label);
+    if (NumEdgeSources) {
+      O << "|{";
+
+      for (unsigned i = 0; i != NumEdgeSources; ++i) {
+        if (i) O << "|";
+        O << "<s" << i << ">";
+        if (EdgeSourceLabels) O << DOT::EscapeString((*EdgeSourceLabels)[i]);
+      }
+      O << "}}";
+    }
+    O << "\"];\n";
+  }
+
+  /// emitEdge - Output an edge from a simple node into the graph...
+  void emitEdge(const void *SrcNodeID, int SrcNodePort,
+                const void *DestNodeID, int DestNodePort,
+                const std::string &Attrs) {
+    if (SrcNodePort  > 64) return;             // Eminating from truncated part?
+    if (DestNodePort > 64) DestNodePort = 64;  // Targeting the truncated part?
+
+    O << "\tNode" << SrcNodeID;
+    if (SrcNodePort >= 0)
+      O << ":s" << SrcNodePort;
+    O << " -> Node" << DestNodeID;
+    if (DestNodePort >= 0 && DTraits.hasEdgeDestLabels())
+      O << ":d" << DestNodePort;
+
+    if (!Attrs.empty())
+      O << "[" << Attrs << "]";
+    O << ";\n";
+  }
+
+  /// getOStream - Get the raw output stream into the graph file. Useful to
+  /// write fancy things using addCustomGraphFeatures().
+  raw_ostream &getOStream() {
+    return O;
+  }
+};
+
+template<typename GraphType>
+raw_ostream &WriteGraph(raw_ostream &O, const GraphType &G,
+                        bool ShortNames = false,
+                        const Twine &Title = "") {
+  // Start the graph emission process...
+  GraphWriter<GraphType> W(O, G, ShortNames);
+
+  // Emit the graph.
+  W.writeGraph(Title.str());
+
+  return O;
+}
+
+std::string createGraphFilename(const Twine &Name, int &FD);
+
+/// Writes graph into a provided {@code Filename}.
+/// If {@code Filename} is empty, generates a random one.
+/// \return The resulting filename, or an empty string if writing
+/// failed.
+template <typename GraphType>
+std::string WriteGraph(const GraphType &G, const Twine &Name,
+                       bool ShortNames = false,
+                       const Twine &Title = "",
+                       std::string Filename = "") {
+  int FD;
+  // Windows can't always handle long paths, so limit the length of the name.
+  std::string N = Name.str();
+  N = N.substr(0, std::min<std::size_t>(N.size(), 140));
+  if (Filename.empty()) {
+    Filename = createGraphFilename(N, FD);
+  } else {
+    std::error_code EC = sys::fs::openFileForWrite(Filename, FD);
+
+    // Writing over an existing file is not considered an error.
+    if (EC == std::errc::file_exists) {
+      errs() << "file exists, overwriting" << "\n";
+    } else if (EC) {
+      errs() << "error writing into file" << "\n";
+      return "";
+    }
+  }
+  raw_fd_ostream O(FD, /*shouldClose=*/ true);
+
+  if (FD == -1) {
+    errs() << "error opening file '" << Filename << "' for writing!\n";
+    return "";
+  }
+
+  llvm::WriteGraph(O, G, ShortNames, Title);
+  errs() << " done. \n";
+
+  return Filename;
+}
+
+/// ViewGraph - Emit a dot graph, run 'dot', run gv on the postscript file,
+/// then cleanup.  For use from the debugger.
+///
+template<typename GraphType>
+void ViewGraph(const GraphType &G, const Twine &Name,
+               bool ShortNames = false, const Twine &Title = "",
+               GraphProgram::Name Program = GraphProgram::DOT) {
+  std::string Filename = llvm::WriteGraph(G, Name, ShortNames, Title);
+
+  if (Filename.empty())
+    return;
+
+  DisplayGraph(Filename, false, Program);
+}
+
+} // end namespace llvm
+
+#endif // LLVM_SUPPORT_GRAPHWRITER_H