Index: include/llvm/IR/ModuleSummaryIndex.h
===================================================================
--- include/llvm/IR/ModuleSummaryIndex.h
+++ include/llvm/IR/ModuleSummaryIndex.h
@@ -533,6 +533,9 @@
   // FIXME: Add bitcode read/write support for this field.
   std::map<std::string, TypeIdSummary> TypeIdMap;
 
+  // Maps Oid GUID to the stringified value name (for dissassembly)
+  std::map<GlobalValue::GUID, std::string> OidToValueName;
+
   /// Mapping from original ID to GUID. If original ID can map to multiple
   /// GUIDs, it will be mapped to 0.
   std::map<GlobalValue::GUID, GlobalValue::GUID> OidGuidMap;
@@ -599,6 +602,12 @@
                           std::move(Summary));
   }
 
+  // Add an OID to ValueName to the map tracking them for disassembly
+  void addOidToValueName(GlobalValue::GUID OID, std::string ValueName) {
+    OidToValueName.insert(
+        std::pair<GlobalValue::GUID, std::string>(OID, ValueName));
+  }
+
   /// Add a global value summary for the given ValueInfo.
   void addGlobalValueSummary(ValueInfo VI,
                              std::unique_ptr<GlobalValueSummary> Summary) {
@@ -638,6 +647,14 @@
     return Summary->get();
   }
 
+  std::string findOidToValueName(const GlobalValue::GUID G) const {
+    auto s = OidToValueName.find(G);
+    if (s != OidToValueName.end()) {
+      return s->second;
+    }
+    return "";
+  }
+
   /// Returns the first GlobalValueSummary for \p GV, asserting that there
   /// is only one if \p PerModuleIndex.
   GlobalValueSummary *getGlobalValueSummary(const GlobalValue &GV,
Index: include/llvm/IR/ModuleSummaryIndexYAML.h
===================================================================
--- include/llvm/IR/ModuleSummaryIndexYAML.h
+++ include/llvm/IR/ModuleSummaryIndexYAML.h
@@ -26,6 +26,25 @@
   }
 };
 
+template <> struct ScalarEnumerationTraits<CalleeInfo::HotnessType> {
+  static void enumeration(IO &io, CalleeInfo::HotnessType &value) {
+    io.enumCase(value, "Unknown", CalleeInfo::HotnessType::Unknown);
+    io.enumCase(value, "Cold", CalleeInfo::HotnessType::Cold);
+    io.enumCase(value, "None", CalleeInfo::HotnessType::None);
+    io.enumCase(value, "Hot", CalleeInfo::HotnessType::Hot);
+  }
+};
+
+template <> struct ScalarEnumerationTraits<GlobalValueSummary::SummaryKind> {
+  static void enumeration(IO &io, GlobalValueSummary::SummaryKind &value) {
+    io.enumCase(value, "Alias", GlobalValueSummary::SummaryKind::AliasKind);
+    io.enumCase(value, "Function",
+                GlobalValueSummary::SummaryKind::FunctionKind);
+    io.enumCase(value, "GlobalVar",
+                GlobalValueSummary::SummaryKind::GlobalVarKind);
+  }
+};
+
 template <> struct MappingTraits<TypeTestResolution> {
   static void mapping(IO &io, TypeTestResolution &res) {
     io.mapOptional("Kind", res.TheKind);
@@ -127,9 +146,20 @@
   }
 };
 
+struct CalleeInfoYaml {
+  std::string Name;
+  GlobalValue::GUID GUID;
+  CalleeInfo::HotnessType Hotness;
+};
+
 struct FunctionSummaryYaml {
-  unsigned Linkage;
+  GlobalValue::GUID GUID;
+  GlobalValueSummary::SummaryKind Kind;
+  GlobalValue::LinkageTypes Linkage;
   bool NotEligibleToImport, Live;
+  unsigned InstCount;
+  std::vector<CalleeInfoYaml> Calls;
+
   std::vector<uint64_t> TypeTests;
   std::vector<FunctionSummary::VFuncId> TypeTestAssumeVCalls,
       TypeCheckedLoadVCalls;
@@ -137,6 +167,21 @@
       TypeCheckedLoadConstVCalls;
 };
 
+struct GlobalVarSummaryYaml {
+  GlobalValue::GUID GUID;
+  GlobalValueSummary::SummaryKind Kind;
+  GlobalValue::LinkageTypes Linkage;
+  bool NotEligibleToImport, Live;
+};
+
+struct AliasSummaryYaml {
+  GlobalValue::GUID GUID;
+  GlobalValueSummary::SummaryKind Kind;
+  GlobalValue::LinkageTypes Linkage;
+  bool NotEligibleToImport, Live;
+  std::string Aliasee;
+};
+
 } // End yaml namespace
 } // End llvm namespace
 
@@ -168,11 +213,23 @@
 namespace llvm {
 namespace yaml {
 
+template <> struct MappingTraits<CalleeInfoYaml> {
+  static void mapping(IO &io, CalleeInfoYaml &summary) {
+    io.mapOptional("Name", summary.Name);
+    io.mapOptional("GUID", summary.GUID);
+    io.mapOptional("Hotness", summary.Hotness);
+  }
+};
+
 template <> struct MappingTraits<FunctionSummaryYaml> {
   static void mapping(IO &io, FunctionSummaryYaml& summary) {
+    io.mapOptional("GUID", summary.GUID);
+    io.mapOptional("Kind", summary.Kind);
     io.mapOptional("Linkage", summary.Linkage);
     io.mapOptional("NotEligibleToImport", summary.NotEligibleToImport);
     io.mapOptional("Live", summary.Live);
+    io.mapOptional("InstCount", summary.InstCount);
+    io.mapOptional("Calls", summary.Calls);
     io.mapOptional("TypeTests", summary.TypeTests);
     io.mapOptional("TypeTestAssumeVCalls", summary.TypeTestAssumeVCalls);
     io.mapOptional("TypeCheckedLoadVCalls", summary.TypeCheckedLoadVCalls);
@@ -183,28 +240,86 @@
   }
 };
 
+template <> struct MappingTraits<GlobalVarSummaryYaml> {
+  static void mapping(IO &io, GlobalVarSummaryYaml &summary) {
+    io.mapOptional("GUID", summary.GUID);
+    io.mapOptional("Kind", summary.Kind);
+    io.mapOptional("Linkage", summary.Linkage);
+    io.mapOptional("NotEligibleToImport", summary.NotEligibleToImport);
+    io.mapOptional("Live", summary.Live);
+  }
+};
+
+template <> struct MappingTraits<AliasSummaryYaml> {
+  static void mapping(IO &io, AliasSummaryYaml &summary) {
+    io.mapOptional("GUID", summary.GUID);
+    io.mapOptional("Kind", summary.Kind);
+    io.mapOptional("Linkage", summary.Linkage);
+    io.mapOptional("NotEligibleToImport", summary.NotEligibleToImport);
+    io.mapOptional("Live", summary.Live);
+    io.mapOptional("Aliasee", summary.Aliasee);
+  }
+};
+
 } // End yaml namespace
 } // End llvm namespace
 
 LLVM_YAML_IS_STRING_MAP(TypeIdSummary)
 LLVM_YAML_IS_SEQUENCE_VECTOR(FunctionSummaryYaml)
+LLVM_YAML_IS_SEQUENCE_VECTOR(CalleeInfoYaml)
+LLVM_YAML_IS_SEQUENCE_VECTOR(GlobalVarSummaryYaml)
+LLVM_YAML_IS_SEQUENCE_VECTOR(AliasSummaryYaml)
+LLVM_YAML_IS_SEQUENCE_VECTOR(std::string)
 
 namespace llvm {
 namespace yaml {
 
+struct NGVMValue {
+  ModuleSummaryIndex *Index;
+  GlobalValue::GUID GUID;
+  GlobalValueSummaryInfo *Summary;
+};
+using NamedGlobalValueMap = std::map<std::string, struct NGVMValue>;
+
+template <> struct ScalarEnumerationTraits<GlobalValue::LinkageTypes> {
+  static void enumeration(IO &io, GlobalValue::LinkageTypes &value) {
+    io.enumCase(value, "ExternalLinkage",
+                GlobalValue::LinkageTypes::ExternalLinkage);
+    io.enumCase(value, "AvailableExternallyLinkage",
+                GlobalValue::LinkageTypes::AvailableExternallyLinkage);
+    io.enumCase(value, "LinkOnceAnyLinkage",
+                GlobalValue::LinkageTypes::LinkOnceAnyLinkage);
+    io.enumCase(value, "LinkOnceODRLinkage",
+                GlobalValue::LinkageTypes::LinkOnceODRLinkage);
+    io.enumCase(value, "WeakAnyLinkage",
+                GlobalValue::LinkageTypes::WeakAnyLinkage);
+    io.enumCase(value, "WeakODRLinkage",
+                GlobalValue::LinkageTypes::WeakODRLinkage);
+    io.enumCase(value, "AppendingLinkage",
+                GlobalValue::LinkageTypes::AppendingLinkage);
+    io.enumCase(value, "InternalLinkage",
+                GlobalValue::LinkageTypes::InternalLinkage);
+    io.enumCase(value, "PrivateLinkage",
+                GlobalValue::LinkageTypes::PrivateLinkage);
+    io.enumCase(value, "ExternalWeakLinkage",
+                GlobalValue::LinkageTypes::ExternalWeakLinkage);
+    io.enumCase(value, "CommonLinkage",
+                GlobalValue::LinkageTypes::CommonLinkage);
+  }
+};
+
 // FIXME: Add YAML mappings for the rest of the module summary.
-template <> struct CustomMappingTraits<GlobalValueSummaryMapTy> {
-  static void inputOne(IO &io, StringRef Key, GlobalValueSummaryMapTy &V) {
+template <> struct CustomMappingTraits<NamedGlobalValueMap> {
+  static void inputOne(IO &io, StringRef Key, NamedGlobalValueMap &V) {
     std::vector<FunctionSummaryYaml> FSums;
+    std::vector<GlobalVarSummaryYaml> GVSums;
+    std::vector<AliasSummaryYaml> ASums;
     io.mapRequired(Key.str().c_str(), FSums);
-    uint64_t KeyInt;
-    if (Key.getAsInteger(0, KeyInt)) {
-      io.setError("key not an integer");
-      return;
-    }
-    auto &Elem = V[KeyInt];
+    io.mapRequired(Key.str().c_str(), GVSums);
+    io.mapRequired(Key.str().c_str(), ASums);
+    auto &Elem = V[Key].Summary;
     for (auto &FSum : FSums) {
-      Elem.SummaryList.push_back(llvm::make_unique<FunctionSummary>(
+      Elem->SummaryList.push_back(llvm::make_unique<FunctionSummary>(
           GlobalValueSummary::GVFlags(
               static_cast<GlobalValue::LinkageTypes>(FSum.Linkage),
               FSum.NotEligibleToImport, FSum.Live),
@@ -214,29 +329,87 @@
           std::move(FSum.TypeTestAssumeConstVCalls),
           std::move(FSum.TypeCheckedLoadConstVCalls)));
     }
+
+    for (auto &GVSum : GVSums) {
+      Elem->SummaryList.push_back(llvm::make_unique<GlobalVarSummary>(
+          GlobalValueSummary::GVFlags(
+              static_cast<GlobalValue::LinkageTypes>(GVSum.Linkage),
+              GVSum.NotEligibleToImport, GVSum.Live),
+          ArrayRef<ValueInfo>{}));
+    }
+
+    for (auto &ASum : ASums) {
+      Elem->SummaryList.push_back(llvm::make_unique<AliasSummary>(
+          GlobalValueSummary::GVFlags(
+              static_cast<GlobalValue::LinkageTypes>(ASum.Linkage),
+              ASum.NotEligibleToImport, ASum.Live),
+          ArrayRef<ValueInfo>{}));
+    }
   }
-  static void output(IO &io, GlobalValueSummaryMapTy &V) {
+
+  static void output(IO &io, NamedGlobalValueMap &V) {
     for (auto &P : V) {
       std::vector<FunctionSummaryYaml> FSums;
-      for (auto &Sum : P.second.SummaryList) {
-        if (auto *FSum = dyn_cast<FunctionSummary>(Sum.get()))
+      std::vector<GlobalVarSummaryYaml> GVSums;
+      std::vector<AliasSummaryYaml> ASums;
+      for (auto &Sum : P.second.Summary->SummaryList) {
+        if (auto *FSum = dyn_cast<FunctionSummary>(Sum.get())) {
+          std::vector<CalleeInfoYaml> Calls;
+          for (auto edge : FSum->calls()) {
+            Calls.push_back(
+                {P.second.Index->findOidToValueName(edge.first.getGUID()),
+                 edge.first.getGUID(), edge.second.Hotness});
+          }
           FSums.push_back(FunctionSummaryYaml{
-              FSum->flags().Linkage,
+              P.second.GUID, FSum->getSummaryKind(),
+              static_cast<GlobalValue::LinkageTypes>(FSum->flags().Linkage),
               static_cast<bool>(FSum->flags().NotEligibleToImport),
-              static_cast<bool>(FSum->flags().Live), FSum->type_tests(),
+              static_cast<bool>(FSum->flags().Live),
+
+              FSum->instCount(), Calls, FSum->type_tests(),
               FSum->type_test_assume_vcalls(), FSum->type_checked_load_vcalls(),
               FSum->type_test_assume_const_vcalls(),
               FSum->type_checked_load_const_vcalls()});
+        }
+      }
+      for (auto &Sum : P.second.Summary->SummaryList) {
+        if (auto *GVSum = dyn_cast<GlobalVarSummary>(Sum.get()))
+          GVSums.push_back(GlobalVarSummaryYaml{
+              P.second.GUID, GVSum->getSummaryKind(),
+              static_cast<GlobalValue::LinkageTypes>(GVSum->flags().Linkage),
+              static_cast<bool>(GVSum->flags().NotEligibleToImport),
+              static_cast<bool>(GVSum->flags().Live)});
+      }
+      for (auto &Sum : P.second.Summary->SummaryList) {
+        if (auto *ASum = dyn_cast<AliasSummary>(Sum.get()))
+          ASums.push_back(AliasSummaryYaml{
+              P.second.GUID, ASum->getSummaryKind(),
+              static_cast<GlobalValue::LinkageTypes>(ASum->flags().Linkage),
+              static_cast<bool>(ASum->flags().NotEligibleToImport),
+              static_cast<bool>(ASum->flags().Live),
+              P.second.Index->findOidToValueName(
+                  ASum->getAliasee().getOriginalName())});
       }
       if (!FSums.empty())
-        io.mapRequired(llvm::utostr(P.first).c_str(), FSums);
+        io.mapRequired(P.first.c_str(), FSums);
+      if (!GVSums.empty())
+        io.mapRequired(P.first.c_str(), GVSums);
+      if (!ASums.empty())
+        io.mapRequired(P.first.c_str(), ASums);
     }
   }
 };
 
 template <> struct MappingTraits<ModuleSummaryIndex> {
   static void mapping(IO &io, ModuleSummaryIndex& index) {
-    io.mapOptional("GlobalValueMap", index.GlobalValueMap);
+    NamedGlobalValueMap M;
+    for (gvsummary_iterator i = index.GlobalValueMap.begin();
+         i != index.GlobalValueMap.end(); i++) {
+      std::string name = index.findOidToValueName(i->first);
+      M.insert(std::pair<std::string, struct NGVMValue>(
+          name, NGVMValue{&index, i->first, &i->second}));
+    }
+    io.mapOptional("NamedGlobalValueMap", M);
     io.mapOptional("TypeIdMap", index.TypeIdMap);
     io.mapOptional("WithGlobalValueDeadStripping",
                    index.WithGlobalValueDeadStripping);
Index: lib/Bitcode/Reader/BitcodeReader.cpp
===================================================================
--- lib/Bitcode/Reader/BitcodeReader.cpp
+++ lib/Bitcode/Reader/BitcodeReader.cpp
@@ -4712,6 +4712,7 @@
   auto OriginalNameID = ValueGUID;
   if (GlobalValue::isLocalLinkage(Linkage))
     OriginalNameID = GlobalValue::getGUID(ValueName);
+  TheIndex.addOidToValueName(OriginalNameID, GlobalId);
   if (PrintSummaryGUIDs)
     dbgs() << "GUID " << ValueGUID << "(" << OriginalNameID << ") is "
            << ValueName << "\n";
Index: test/tools/llvm-lto2/X86/dump-summary.ll
===================================================================
--- /dev/null
+++ test/tools/llvm-lto2/X86/dump-summary.ll
@@ -0,0 +1,17 @@
+; RUN: opt -module-summary %s -o %t.o
+; RUN: llvm-lto2 dump-summary %t.o | egrep 'Kind:\s+GlobalVar'
+; RUN: llvm-lto2 dump-summary %t.o | egrep 'Kind:\s+Function'
+; RUN: llvm-lto2 dump-summary %t.o | egrep 'Kind:\s+Alias'
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+@G = constant i32 2048, align 4
+@a = weak alias i32, i32* @G
+
+define void @boop() {
+  tail call void @afun()
+  ret void
+}
+
+declare void @afun()
+declare void @testtest()
Index: tools/llvm-lto2/llvm-lto2.cpp
===================================================================
--- tools/llvm-lto2/llvm-lto2.cpp
+++ tools/llvm-lto2/llvm-lto2.cpp
@@ -16,9 +16,11 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/LTO/Caching.h"
+#include "llvm/Bitcode/BitcodeReader.h"
 #include "llvm/CodeGen/CommandFlags.h"
 #include "llvm/IR/DiagnosticPrinter.h"
+#include "llvm/IR/ModuleSummaryIndexYAML.h"
+#include "llvm/LTO/Caching.h"
 #include "llvm/LTO/LTO.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FileSystem.h"
@@ -132,7 +134,7 @@
 }
 
 static int usage() {
-  errs() << "Available subcommands: dump-symtab run\n";
+  errs() << "Available subcommands: dump-symtab dump-summary run\n";
   return 1;
 }
 
@@ -351,6 +353,19 @@
   return 0;
 }
 
+static int dumpSummary(int argc, char **argv) {
+  for (StringRef F : make_range(argv + 1, argv + argc)) {
+    std::unique_ptr<MemoryBuffer> MB = check(MemoryBuffer::getFile(F), F);
+    std::unique_ptr<ModuleSummaryIndex> Index =
+        check(getModuleSummaryIndex(*MB), F);
+
+    yaml::Output Out(outs());
+    Out << *Index;
+  }
+
+  return 0;
+}
+
 int main(int argc, char **argv) {
   InitializeAllTargets();
   InitializeAllTargetMCs();
@@ -368,6 +383,8 @@
   argv[1] = argv[0];
   if (Subcommand == "dump-symtab")
     return dumpSymtab(argc - 1, argv + 1);
+  if (Subcommand == "dump-summary")
+    return dumpSummary(argc - 1, argv + 1);
   if (Subcommand == "run")
     return run(argc - 1, argv + 1);
   return usage();