Revert "[ThinLTO] Add GraphTraits for FunctionSummaries"

It caused assertion failure
Assertion failed: (!DD.IsLambda && !MergeDD.IsLambda && "faked up lambda definition?"), function MergeDefinitionData, file /Users/buildslave/jenkins/workspace/clang-stage1-configure-RA/llvm/tools/clang/lib/Serialization/ASTReaderDecl.cpp, line 1675.

on the second stage build bots.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@324932 91177308-0d34-0410-b5e6-96231b3b80d8

lib/IR/ModuleSummaryIndex.cpp

@@ -13,14 +13,10 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/IR/ModuleSummaryIndex.h"
-#include "llvm/ADT/SCCIterator.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/Support/Path.h"
-#include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
-FunctionSummary FunctionSummary::ExternalNode =
-    FunctionSummary::makeDummyFunctionSummary({});
 bool ValueInfo::isDSOLocal() const {
   // Need to check all summaries are local in case of hash collisions.
   return getSummaryList().size() &&
@@ -84,26 +80,6 @@ bool ModuleSummaryIndex::isGUIDLive(GlobalValue::GUID GUID) const {
   return false;
 }
 
-// TODO: write a graphviz dumper for SCCs (see ModuleSummaryIndex::exportToDot)
-// then delete this function and update its tests
-LLVM_DUMP_METHOD
-void ModuleSummaryIndex::dumpSCCs(raw_ostream &O) {
-  for (scc_iterator<ModuleSummaryIndex *> I =
-           scc_begin<ModuleSummaryIndex *>(this);
-       !I.isAtEnd(); ++I) {
-    O << "SCC (" << utostr(I->size()) << " node" << (I->size() == 1 ? "" : "s")
-      << ") {\n";
-    for (const ValueInfo V : *I) {
-      FunctionSummary *F = nullptr;
-      if (V.getSummaryList().size())
-        F = cast<FunctionSummary>(V.getSummaryList().front().get());
-      O << " " << (F == nullptr ? "External" : "") << " " << utostr(V.getGUID())
-        << (I.hasLoop() ? " (has loop)" : "") << "\n";
-    }
-    O << "}\n";
-  }
-}
-
 namespace {
 struct Attributes {
   void add(const Twine &Name, const Twine &Value,