Index: llvm/docs/LangRef.rst
===================================================================
--- llvm/docs/LangRef.rst
+++ llvm/docs/LangRef.rst
@@ -907,7 +907,7 @@
 
 Syntax::
 
-    @<Name> = [Linkage] [Visibility] ifunc <IFuncTy>, <ResolverTy>* @<Resolver>
+    @<Name> = [Linkage] [PreemptionSpecifier] [Visibility] ifunc <IFuncTy>, <ResolverTy>* @<Resolver>
 
 
 .. _langref_comdats:
Index: llvm/include/llvm-c/Core.h
===================================================================
--- llvm/include/llvm-c/Core.h
+++ llvm/include/llvm-c/Core.h
@@ -1580,10 +1580,10 @@
       macro(ConstantVector)                 \
       macro(GlobalValue)                    \
         macro(GlobalAlias)                  \
-        macro(GlobalIFunc)                  \
         macro(GlobalObject)                 \
           macro(Function)                   \
           macro(GlobalVariable)             \
+          macro(GlobalIFunc)                \
       macro(UndefValue)                     \
       macro(PoisonValue)                    \
     macro(Instruction)                      \
Index: llvm/include/llvm/AsmParser/LLParser.h
===================================================================
--- llvm/include/llvm/AsmParser/LLParser.h
+++ llvm/include/llvm/AsmParser/LLParser.h
@@ -304,11 +304,10 @@
                      unsigned DLLStorageClass, bool DSOLocal,
                      GlobalVariable::ThreadLocalMode TLM,
                      GlobalVariable::UnnamedAddr UnnamedAddr);
-    bool parseIndirectSymbol(const std::string &Name, LocTy NameLoc,
-                             unsigned L, unsigned Visibility,
-                             unsigned DLLStorageClass, bool DSOLocal,
-                             GlobalVariable::ThreadLocalMode TLM,
-                             GlobalVariable::UnnamedAddr UnnamedAddr);
+    bool parseAliasOrIFunc(const std::string &Name, LocTy NameLoc, unsigned L,
+                           unsigned Visibility, unsigned DLLStorageClass,
+                           bool DSOLocal, GlobalVariable::ThreadLocalMode TLM,
+                           GlobalVariable::UnnamedAddr UnnamedAddr);
     bool parseComdat();
     bool parseStandaloneMetadata();
     bool parseNamedMetadata();
Index: llvm/include/llvm/CodeGen/AsmPrinter.h
===================================================================
--- llvm/include/llvm/CodeGen/AsmPrinter.h
+++ llvm/include/llvm/CodeGen/AsmPrinter.h
@@ -41,7 +41,6 @@
 class DwarfDebug;
 class GCMetadataPrinter;
 class GCStrategy;
-class GlobalIndirectSymbol;
 class GlobalObject;
 class GlobalValue;
 class GlobalVariable;
@@ -795,8 +794,8 @@
   void emitModuleCommandLines(Module &M);
 
   GCMetadataPrinter *GetOrCreateGCPrinter(GCStrategy &S);
-  /// Emit GlobalAlias or GlobalIFunc.
-  void emitGlobalIndirectSymbol(Module &M, const GlobalIndirectSymbol &GIS);
+  void emitGlobalAlias(Module &M, const GlobalAlias &GA);
+  void emitGlobalIFunc(Module &M, const GlobalIFunc &GI);
 
   /// This method decides whether the specified basic block requires a label.
   bool shouldEmitLabelForBasicBlock(const MachineBasicBlock &MBB) const;
Index: llvm/include/llvm/IR/GlobalAlias.h
===================================================================
--- llvm/include/llvm/IR/GlobalAlias.h
+++ llvm/include/llvm/IR/GlobalAlias.h
@@ -15,7 +15,8 @@
 #define LLVM_IR_GLOBALALIAS_H
 
 #include "llvm/ADT/ilist_node.h"
-#include "llvm/IR/GlobalIndirectSymbol.h"
+#include "llvm/IR/GlobalValue.h"
+#include "llvm/IR/OperandTraits.h"
 #include "llvm/IR/Value.h"
 
 namespace llvm {
@@ -24,8 +25,7 @@
 class Module;
 template <typename ValueSubClass> class SymbolTableListTraits;
 
-class GlobalAlias : public GlobalIndirectSymbol,
-                    public ilist_node<GlobalAlias> {
+class GlobalAlias : public GlobalValue, public ilist_node<GlobalAlias> {
   friend class SymbolTableListTraits<GlobalAlias>;
 
   GlobalAlias(Type *Ty, unsigned AddressSpace, LinkageTypes Linkage,
@@ -58,6 +58,17 @@
   // Linkage, Type, Parent and AddressSpace taken from the Aliasee.
   static GlobalAlias *create(const Twine &Name, GlobalValue *Aliasee);
 
+  // allocate space for exactly one operand
+  void *operator new(size_t S) { return User::operator new(S, 1); }
+  void operator delete(void *Ptr) { User::operator delete(Ptr); }
+
+  /// Provide fast operand accessors
+  DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
+
+  void copyAttributesFrom(const GlobalAlias *Src) {
+    GlobalValue::copyAttributesFrom(Src);
+  }
+
   /// removeFromParent - This method unlinks 'this' from the containing module,
   /// but does not delete it.
   ///
@@ -71,11 +82,9 @@
   /// These methods retrieve and set alias target.
   void setAliasee(Constant *Aliasee);
   const Constant *getAliasee() const {
-    return getIndirectSymbol();
-  }
-  Constant *getAliasee() {
-    return getIndirectSymbol();
+    return static_cast<Constant *>(Op<0>().get());
   }
+  Constant *getAliasee() { return static_cast<Constant *>(Op<0>().get()); }
 
   const GlobalObject *getAliaseeObject() const;
   GlobalObject *getAliaseeObject() {
@@ -94,6 +103,12 @@
   }
 };
 
+template <>
+struct OperandTraits<GlobalAlias>
+    : public FixedNumOperandTraits<GlobalAlias, 1> {};
+
+DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GlobalAlias, Constant)
+
 } // end namespace llvm
 
 #endif // LLVM_IR_GLOBALALIAS_H
Index: llvm/include/llvm/IR/GlobalIFunc.h
===================================================================
--- llvm/include/llvm/IR/GlobalIFunc.h
+++ llvm/include/llvm/IR/GlobalIFunc.h
@@ -18,7 +18,9 @@
 #define LLVM_IR_GLOBALIFUNC_H
 
 #include "llvm/ADT/ilist_node.h"
-#include "llvm/IR/GlobalIndirectSymbol.h"
+#include "llvm/IR/Constant.h"
+#include "llvm/IR/GlobalObject.h"
+#include "llvm/IR/OperandTraits.h"
 #include "llvm/IR/Value.h"
 
 namespace llvm {
@@ -29,8 +31,7 @@
 // Traits class for using GlobalIFunc in symbol table in Module.
 template <typename ValueSubClass> class SymbolTableListTraits;
 
-class GlobalIFunc final : public GlobalIndirectSymbol,
-                          public ilist_node<GlobalIFunc> {
+class GlobalIFunc final : public GlobalObject, public ilist_node<GlobalIFunc> {
   friend class SymbolTableListTraits<GlobalIFunc>;
 
   GlobalIFunc(Type *Ty, unsigned AddressSpace, LinkageTypes Linkage,
@@ -46,6 +47,17 @@
                              LinkageTypes Linkage, const Twine &Name,
                              Constant *Resolver, Module *Parent);
 
+  // allocate space for exactly one operand
+  void *operator new(size_t S) { return User::operator new(S, 1); }
+  void operator delete(void *Ptr) { User::operator delete(Ptr); }
+
+  /// Provide fast operand accessors
+  DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
+
+  void copyAttributesFrom(const GlobalIFunc *Src) {
+    GlobalObject::copyAttributesFrom(Src);
+  }
+
   /// This method unlinks 'this' from the containing module, but does not
   /// delete it.
   void removeFromParent();
@@ -54,11 +66,11 @@
   void eraseFromParent();
 
   /// These methods retrieve and set ifunc resolver function.
-  void setResolver(Constant *Resolver) {
-    setIndirectSymbol(Resolver);
+  void setResolver(Constant *Resolver) { Op<0>().set(Resolver); }
+  const Constant *getResolver() const {
+    return static_cast<Constant *>(Op<0>().get());
   }
-  const Constant *getResolver() const { return getIndirectSymbol(); }
-  Constant *getResolver() { return getIndirectSymbol(); }
+  Constant *getResolver() { return static_cast<Constant *>(Op<0>().get()); }
 
   // Return the resolver function after peeling off potential ConstantExpr
   // indirection.
@@ -74,6 +86,12 @@
   }
 };
 
+template <>
+struct OperandTraits<GlobalIFunc>
+    : public FixedNumOperandTraits<GlobalIFunc, 1> {};
+
+DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GlobalIFunc, Constant)
+
 } // end namespace llvm
 
 #endif // LLVM_IR_GLOBALIFUNC_H
Index: llvm/include/llvm/IR/GlobalIndirectSymbol.h
===================================================================
--- llvm/include/llvm/IR/GlobalIndirectSymbol.h
+++ /dev/null
@@ -1,82 +0,0 @@
-//===- llvm/GlobalIndirectSymbol.h - GlobalIndirectSymbol class -*- 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 contains the declaration of the GlobalIndirectSymbol class, which
-// is a base class for GlobalAlias and GlobalIFunc. It contains all common code
-// for aliases and ifuncs.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_IR_GLOBALINDIRECTSYMBOL_H
-#define LLVM_IR_GLOBALINDIRECTSYMBOL_H
-
-#include "llvm/IR/GlobalObject.h"
-#include "llvm/IR/GlobalValue.h"
-#include "llvm/IR/OperandTraits.h"
-#include "llvm/IR/User.h"
-#include "llvm/IR/Value.h"
-#include "llvm/Support/Casting.h"
-#include <cstddef>
-
-namespace llvm {
-
-class GlobalIndirectSymbol : public GlobalValue {
-protected:
-  GlobalIndirectSymbol(Type *Ty, ValueTy VTy, unsigned AddressSpace,
-      LinkageTypes Linkage, const Twine &Name, Constant *Symbol);
-
-public:
-  GlobalIndirectSymbol(const GlobalIndirectSymbol &) = delete;
-  GlobalIndirectSymbol &operator=(const GlobalIndirectSymbol &) = delete;
-
-  // allocate space for exactly one operand
-  void *operator new(size_t S) { return User::operator new(S, 1); }
-  void operator delete(void *Ptr) { User::operator delete(Ptr); }
-
-  /// Provide fast operand accessors
-  DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
-
-  void copyAttributesFrom(const GlobalValue *Src) {
-    GlobalValue::copyAttributesFrom(Src);
-  }
-
-  /// These methods set and retrieve indirect symbol.
-  void setIndirectSymbol(Constant *Symbol) {
-    setOperand(0, Symbol);
-  }
-  const Constant *getIndirectSymbol() const {
-    return getOperand(0);
-  }
-  Constant *getIndirectSymbol() {
-    return const_cast<Constant *>(
-          static_cast<const GlobalIndirectSymbol *>(this)->getIndirectSymbol());
-  }
-
-  const GlobalObject *getAliaseeObject() const;
-  GlobalObject *getAliaseeObject() {
-    return const_cast<GlobalObject *>(
-        static_cast<const GlobalIndirectSymbol *>(this)->getAliaseeObject());
-  }
-
-  // Methods for support type inquiry through isa, cast, and dyn_cast:
-  static bool classof(const Value *V) {
-    return V->getValueID() == Value::GlobalAliasVal ||
-           V->getValueID() == Value::GlobalIFuncVal;
-  }
-};
-
-template <>
-struct OperandTraits<GlobalIndirectSymbol> :
-  public FixedNumOperandTraits<GlobalIndirectSymbol, 1> {
-};
-
-DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GlobalIndirectSymbol, Constant)
-
-} // end namespace llvm
-
-#endif // LLVM_IR_GLOBALINDIRECTSYMBOL_H
Index: llvm/include/llvm/IR/GlobalObject.h
===================================================================
--- llvm/include/llvm/IR/GlobalObject.h
+++ llvm/include/llvm/IR/GlobalObject.h
@@ -153,7 +153,8 @@
   // Methods for support type inquiry through isa, cast, and dyn_cast:
   static bool classof(const Value *V) {
     return V->getValueID() == Value::FunctionVal ||
-           V->getValueID() == Value::GlobalVariableVal;
+           V->getValueID() == Value::GlobalVariableVal ||
+           V->getValueID() == Value::GlobalIFuncVal;
   }
 
 private:
Index: llvm/include/llvm/IR/Value.h
===================================================================
--- llvm/include/llvm/IR/Value.h
+++ llvm/include/llvm/IR/Value.h
@@ -37,7 +37,6 @@
 class Function;
 class GlobalAlias;
 class GlobalIFunc;
-class GlobalIndirectSymbol;
 class GlobalObject;
 class GlobalValue;
 class GlobalVariable;
@@ -1016,21 +1015,16 @@
   }
 };
 
-template <> struct isa_impl<GlobalIndirectSymbol, Value> {
-  static inline bool doit(const Value &Val) {
-    return isa<GlobalAlias>(Val) || isa<GlobalIFunc>(Val);
-  }
-};
-
 template <> struct isa_impl<GlobalValue, Value> {
   static inline bool doit(const Value &Val) {
-    return isa<GlobalObject>(Val) || isa<GlobalIndirectSymbol>(Val);
+    return isa<GlobalObject>(Val) || isa<GlobalAlias>(Val);
   }
 };
 
 template <> struct isa_impl<GlobalObject, Value> {
   static inline bool doit(const Value &Val) {
-    return isa<GlobalVariable>(Val) || isa<Function>(Val);
+    return isa<GlobalVariable>(Val) || isa<Function>(Val) ||
+           isa<GlobalIFunc>(Val);
   }
 };
 
Index: llvm/include/llvm/Transforms/Utils/ValueMapper.h
===================================================================
--- llvm/include/llvm/Transforms/Utils/ValueMapper.h
+++ llvm/include/llvm/Transforms/Utils/ValueMapper.h
@@ -22,7 +22,6 @@
 
 class Constant;
 class Function;
-class GlobalIndirectSymbol;
 class GlobalVariable;
 class Instruction;
 class MDNode;
@@ -122,7 +121,8 @@
 /// instance:
 /// - \a scheduleMapGlobalInitializer()
 /// - \a scheduleMapAppendingVariable()
-/// - \a scheduleMapGlobalIndirectSymbol()
+/// - \a scheduleMapGlobalAlias()
+/// - \a scheduleMapGlobalIFunc()
 /// - \a scheduleRemapFunction()
 ///
 /// Sometimes a callback needs a different mapping context.  Such a context can
@@ -182,9 +182,10 @@
                                     bool IsOldCtorDtor,
                                     ArrayRef<Constant *> NewMembers,
                                     unsigned MappingContextID = 0);
-  void scheduleMapGlobalIndirectSymbol(GlobalIndirectSymbol &GIS,
-                                       Constant &Target,
-                                       unsigned MappingContextID = 0);
+  void scheduleMapGlobalAlias(GlobalAlias &GA, Constant &Aliasee,
+                              unsigned MappingContextID = 0);
+  void scheduleMapGlobalIFunc(GlobalIFunc &GI, Constant &Resolver,
+                              unsigned MappingContextID = 0);
   void scheduleRemapFunction(Function &F, unsigned MappingContextID = 0);
 };
 
Index: llvm/lib/AsmParser/LLParser.cpp
===================================================================
--- llvm/lib/AsmParser/LLParser.cpp
+++ llvm/lib/AsmParser/LLParser.cpp
@@ -601,12 +601,15 @@
       parseOptionalThreadLocal(TLM) || parseOptionalUnnamedAddr(UnnamedAddr))
     return true;
 
-  if (Lex.getKind() != lltok::kw_alias && Lex.getKind() != lltok::kw_ifunc)
+  switch (Lex.getKind()) {
+  default:
     return parseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility,
                        DLLStorageClass, DSOLocal, TLM, UnnamedAddr);
-
-  return parseIndirectSymbol(Name, NameLoc, Linkage, Visibility,
+  case lltok::kw_alias:
+  case lltok::kw_ifunc:
+    return parseAliasOrIFunc(Name, NameLoc, Linkage, Visibility,
                              DLLStorageClass, DSOLocal, TLM, UnnamedAddr);
+  }
 }
 
 /// parseNamedGlobal:
@@ -631,12 +634,15 @@
       parseOptionalThreadLocal(TLM) || parseOptionalUnnamedAddr(UnnamedAddr))
     return true;
 
-  if (Lex.getKind() != lltok::kw_alias && Lex.getKind() != lltok::kw_ifunc)
+  switch (Lex.getKind()) {
+  default:
     return parseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility,
                        DLLStorageClass, DSOLocal, TLM, UnnamedAddr);
-
-  return parseIndirectSymbol(Name, NameLoc, Linkage, Visibility,
+  case lltok::kw_alias:
+  case lltok::kw_ifunc:
+    return parseAliasOrIFunc(Name, NameLoc, Linkage, Visibility,
                              DLLStorageClass, DSOLocal, TLM, UnnamedAddr);
+  }
 }
 
 bool LLParser::parseComdat() {
@@ -909,25 +915,25 @@
   return ErrOS.str();
 }
 
-/// parseIndirectSymbol:
+/// parseAliasOrIFunc:
 ///   ::= GlobalVar '=' OptionalLinkage OptionalPreemptionSpecifier
 ///                     OptionalVisibility OptionalDLLStorageClass
 ///                     OptionalThreadLocal OptionalUnnamedAddr
-///                     'alias|ifunc' IndirectSymbol IndirectSymbolAttr*
+///                     'alias|ifunc' AliaseeOrResolver SymbolAttrs*
 ///
-/// IndirectSymbol
+/// AliaseeOrResolver
 ///   ::= TypeAndValue
 ///
-/// IndirectSymbolAttr
+/// SymbolAttrs
 ///   ::= ',' 'partition' StringConstant
 ///
 /// Everything through OptionalUnnamedAddr has already been parsed.
 ///
-bool LLParser::parseIndirectSymbol(const std::string &Name, LocTy NameLoc,
-                                   unsigned L, unsigned Visibility,
-                                   unsigned DLLStorageClass, bool DSOLocal,
-                                   GlobalVariable::ThreadLocalMode TLM,
-                                   GlobalVariable::UnnamedAddr UnnamedAddr) {
+bool LLParser::parseAliasOrIFunc(const std::string &Name, LocTy NameLoc,
+                                 unsigned L, unsigned Visibility,
+                                 unsigned DLLStorageClass, bool DSOLocal,
+                                 GlobalVariable::ThreadLocalMode TLM,
+                                 GlobalVariable::UnnamedAddr UnnamedAddr) {
   bool IsAlias;
   if (Lex.getKind() == lltok::kw_alias)
     IsAlias = true;
@@ -1009,21 +1015,26 @@
     }
   }
 
-  // Okay, create the alias but do not insert it into the module yet.
-  std::unique_ptr<GlobalIndirectSymbol> GA;
-  if (IsAlias)
+  // Okay, create the alias/ifunc but do not insert it into the module yet.
+  std::unique_ptr<GlobalAlias> GA;
+  std::unique_ptr<GlobalIFunc> GI;
+  GlobalValue *GV;
+  if (IsAlias) {
     GA.reset(GlobalAlias::create(Ty, AddrSpace,
                                  (GlobalValue::LinkageTypes)Linkage, Name,
                                  Aliasee, /*Parent*/ nullptr));
-  else
-    GA.reset(GlobalIFunc::create(Ty, AddrSpace,
+    GV = GA.get();
+  } else {
+    GI.reset(GlobalIFunc::create(Ty, AddrSpace,
                                  (GlobalValue::LinkageTypes)Linkage, Name,
                                  Aliasee, /*Parent*/ nullptr));
-  GA->setThreadLocalMode(TLM);
-  GA->setVisibility((GlobalValue::VisibilityTypes)Visibility);
-  GA->setDLLStorageClass((GlobalValue::DLLStorageClassTypes)DLLStorageClass);
-  GA->setUnnamedAddr(UnnamedAddr);
-  maybeSetDSOLocal(DSOLocal, *GA);
+    GV = GI.get();
+  }
+  GV->setThreadLocalMode(TLM);
+  GV->setVisibility((GlobalValue::VisibilityTypes)Visibility);
+  GV->setDLLStorageClass((GlobalValue::DLLStorageClassTypes)DLLStorageClass);
+  GV->setUnnamedAddr(UnnamedAddr);
+  maybeSetDSOLocal(DSOLocal, *GV);
 
   // At this point we've parsed everything except for the IndirectSymbolAttrs.
   // Now parse them if there are any.
@@ -1032,7 +1043,7 @@
 
     if (Lex.getKind() == lltok::kw_partition) {
       Lex.Lex();
-      GA->setPartition(Lex.getStrVal());
+      GV->setPartition(Lex.getStrVal());
       if (parseToken(lltok::StringConstant, "expected partition string"))
         return true;
     } else {
@@ -1041,30 +1052,27 @@
   }
 
   if (Name.empty())
-    NumberedVals.push_back(GA.get());
+    NumberedVals.push_back(GV);
 
   if (GVal) {
     // Verify that types agree.
-    if (GVal->getType() != GA->getType())
+    if (GVal->getType() != GV->getType())
       return error(
           ExplicitTypeLoc,
           "forward reference and definition of alias have different types");
 
     // If they agree, just RAUW the old value with the alias and remove the
     // forward ref info.
-    GVal->replaceAllUsesWith(GA.get());
+    GVal->replaceAllUsesWith(GV);
     GVal->eraseFromParent();
   }
 
   // Insert into the module, we know its name won't collide now.
   if (IsAlias)
-    M->getAliasList().push_back(cast<GlobalAlias>(GA.get()));
+    M->getAliasList().push_back(GA.release());
   else
-    M->getIFuncList().push_back(cast<GlobalIFunc>(GA.get()));
-  assert(GA->getName() == Name && "Should not be a name conflict!");
-
-  // The module owns this now
-  GA.release();
+    M->getIFuncList().push_back(GI.release());
+  assert(GV->getName() == Name && "Should not be a name conflict!");
 
   return false;
 }
Index: llvm/lib/Bitcode/Reader/BitcodeReader.cpp
===================================================================
--- llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -41,7 +41,6 @@
 #include "llvm/IR/GVMaterializer.h"
 #include "llvm/IR/GlobalAlias.h"
 #include "llvm/IR/GlobalIFunc.h"
-#include "llvm/IR/GlobalIndirectSymbol.h"
 #include "llvm/IR/GlobalObject.h"
 #include "llvm/IR/GlobalValue.h"
 #include "llvm/IR/GlobalVariable.h"
@@ -500,7 +499,7 @@
   SmallVector<Instruction *, 64> InstructionList;
 
   std::vector<std::pair<GlobalVariable *, unsigned>> GlobalInits;
-  std::vector<std::pair<GlobalIndirectSymbol *, unsigned>> IndirectSymbolInits;
+  std::vector<std::pair<GlobalValue *, unsigned>> IndirectSymbolInits;
 
   struct FunctionOperandInfo {
     Function *F;
@@ -2253,8 +2252,7 @@
 /// Resolve all of the initializers for global values and aliases that we can.
 Error BitcodeReader::resolveGlobalAndIndirectSymbolInits() {
   std::vector<std::pair<GlobalVariable *, unsigned>> GlobalInitWorklist;
-  std::vector<std::pair<GlobalIndirectSymbol *, unsigned>>
-      IndirectSymbolInitWorklist;
+  std::vector<std::pair<GlobalValue *, unsigned>> IndirectSymbolInitWorklist;
   std::vector<FunctionOperandInfo> FunctionOperandWorklist;
 
   GlobalInitWorklist.swap(GlobalInits);
@@ -2283,10 +2281,16 @@
       Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]);
       if (!C)
         return error("Expected a constant");
-      GlobalIndirectSymbol *GIS = IndirectSymbolInitWorklist.back().first;
-      if (isa<GlobalAlias>(GIS) && C->getType() != GIS->getType())
-        return error("Alias and aliasee types don't match");
-      GIS->setIndirectSymbol(C);
+      GlobalValue *GV = IndirectSymbolInitWorklist.back().first;
+      if (auto *GA = dyn_cast<GlobalAlias>(GV)) {
+        if (C->getType() != GV->getType())
+          return error("Alias and aliasee types don't match");
+        GA->setAliasee(C);
+      } else if (auto *GI = dyn_cast<GlobalIFunc>(GV)) {
+        GI->setResolver(C);
+      } else {
+        return error("Expected an alias or an ifunc");
+      }
     }
     IndirectSymbolInitWorklist.pop_back();
   }
@@ -3118,8 +3122,7 @@
   // Force deallocation of memory for these vectors to favor the client that
   // want lazy deserialization.
   std::vector<std::pair<GlobalVariable *, unsigned>>().swap(GlobalInits);
-  std::vector<std::pair<GlobalIndirectSymbol *, unsigned>>().swap(
-      IndirectSymbolInits);
+  std::vector<std::pair<GlobalValue *, unsigned>>().swap(IndirectSymbolInits);
   return Error::success();
 }
 
@@ -3499,7 +3502,7 @@
 
   auto Val = Record[OpNum++];
   auto Linkage = Record[OpNum++];
-  GlobalIndirectSymbol *NewGA;
+  GlobalValue *NewGA;
   if (BitCode == bitc::MODULE_CODE_ALIAS ||
       BitCode == bitc::MODULE_CODE_ALIAS_OLD)
     NewGA = GlobalAlias::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name,
Index: llvm/lib/Bitcode/Reader/MetadataLoader.cpp
===================================================================
--- llvm/lib/Bitcode/Reader/MetadataLoader.cpp
+++ llvm/lib/Bitcode/Reader/MetadataLoader.cpp
@@ -40,7 +40,6 @@
 #include "llvm/IR/GVMaterializer.h"
 #include "llvm/IR/GlobalAlias.h"
 #include "llvm/IR/GlobalIFunc.h"
-#include "llvm/IR/GlobalIndirectSymbol.h"
 #include "llvm/IR/GlobalObject.h"
 #include "llvm/IR/GlobalValue.h"
 #include "llvm/IR/GlobalVariable.h"
Index: llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
===================================================================
--- llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -71,7 +71,6 @@
 #include "llvm/IR/GCStrategy.h"
 #include "llvm/IR/GlobalAlias.h"
 #include "llvm/IR/GlobalIFunc.h"
-#include "llvm/IR/GlobalIndirectSymbol.h"
 #include "llvm/IR/GlobalObject.h"
 #include "llvm/IR/GlobalValue.h"
 #include "llvm/IR/GlobalVariable.h"
@@ -1604,14 +1603,13 @@
     emitGlobalVariable(GV);
 }
 
-void AsmPrinter::emitGlobalIndirectSymbol(Module &M,
-                                          const GlobalIndirectSymbol& GIS) {
-  MCSymbol *Name = getSymbol(&GIS);
-  bool IsFunction = GIS.getValueType()->isFunctionTy();
+void AsmPrinter::emitGlobalAlias(Module &M, const GlobalAlias &GA) {
+  MCSymbol *Name = getSymbol(&GA);
+  bool IsFunction = GA.getValueType()->isFunctionTy();
   // Treat bitcasts of functions as functions also. This is important at least
   // on WebAssembly where object and function addresses can't alias each other.
   if (!IsFunction)
-    if (auto *CE = dyn_cast<ConstantExpr>(GIS.getIndirectSymbol()))
+    if (auto *CE = dyn_cast<ConstantExpr>(GA.getAliasee()))
       if (CE->getOpcode() == Instruction::BitCast)
         IsFunction =
           CE->getOperand(0)->getType()->getPointerElementType()->isFunctionTy();
@@ -1621,61 +1619,80 @@
   // point, all the extra label is emitted, we just have to emit linkage for
   // those labels.
   if (TM.getTargetTriple().isOSBinFormatXCOFF()) {
-    assert(!isa<GlobalIFunc>(GIS) && "IFunc is not supported on AIX.");
     assert(MAI->hasVisibilityOnlyWithLinkage() &&
            "Visibility should be handled with emitLinkage() on AIX.");
-    emitLinkage(&GIS, Name);
+    emitLinkage(&GA, Name);
     // If it's a function, also emit linkage for aliases of function entry
     // point.
     if (IsFunction)
-      emitLinkage(&GIS,
-                  getObjFileLowering().getFunctionEntryPointSymbol(&GIS, TM));
+      emitLinkage(&GA,
+                  getObjFileLowering().getFunctionEntryPointSymbol(&GA, TM));
     return;
   }
 
-  if (GIS.hasExternalLinkage() || !MAI->getWeakRefDirective())
+  if (GA.hasExternalLinkage() || !MAI->getWeakRefDirective())
     OutStreamer->emitSymbolAttribute(Name, MCSA_Global);
-  else if (GIS.hasWeakLinkage() || GIS.hasLinkOnceLinkage())
+  else if (GA.hasWeakLinkage() || GA.hasLinkOnceLinkage())
     OutStreamer->emitSymbolAttribute(Name, MCSA_WeakReference);
   else
-    assert(GIS.hasLocalLinkage() && "Invalid alias or ifunc linkage");
+    assert(GA.hasLocalLinkage() && "Invalid alias linkage");
 
   // Set the symbol type to function if the alias has a function type.
   // This affects codegen when the aliasee is not a function.
   if (IsFunction)
-    OutStreamer->emitSymbolAttribute(Name, isa<GlobalIFunc>(GIS)
-                                               ? MCSA_ELF_TypeIndFunction
-                                               : MCSA_ELF_TypeFunction);
+    OutStreamer->emitSymbolAttribute(Name, MCSA_ELF_TypeFunction);
 
-  emitVisibility(Name, GIS.getVisibility());
+  emitVisibility(Name, GA.getVisibility());
 
-  const MCExpr *Expr = lowerConstant(GIS.getIndirectSymbol());
+  const MCExpr *Expr = lowerConstant(GA.getAliasee());
 
-  if (isa<GlobalAlias>(&GIS) && MAI->hasAltEntry() && isa<MCBinaryExpr>(Expr))
+  if (MAI->hasAltEntry() && isa<MCBinaryExpr>(Expr))
     OutStreamer->emitSymbolAttribute(Name, MCSA_AltEntry);
 
   // Emit the directives as assignments aka .set:
   OutStreamer->emitAssignment(Name, Expr);
-  MCSymbol *LocalAlias = getSymbolPreferLocal(GIS);
+  MCSymbol *LocalAlias = getSymbolPreferLocal(GA);
   if (LocalAlias != Name)
     OutStreamer->emitAssignment(LocalAlias, Expr);
 
-  if (auto *GA = dyn_cast<GlobalAlias>(&GIS)) {
-    // If the aliasee does not correspond to a symbol in the output, i.e. the
-    // alias is not of an object or the aliased object is private, then set the
-    // size of the alias symbol from the type of the alias. We don't do this in
-    // other situations as the alias and aliasee having differing types but same
-    // size may be intentional.
-    const GlobalObject *Aliasee = GA->getAliaseeObject();
-    if (MAI->hasDotTypeDotSizeDirective() && GA->getValueType()->isSized() &&
-        (!Aliasee || Aliasee->hasPrivateLinkage())) {
-      const DataLayout &DL = M.getDataLayout();
-      uint64_t Size = DL.getTypeAllocSize(GA->getValueType());
-      OutStreamer->emitELFSize(Name, MCConstantExpr::create(Size, OutContext));
-    }
+  // If the aliasee does not correspond to a symbol in the output, i.e. the
+  // alias is not of an object or the aliased object is private, then set the
+  // size of the alias symbol from the type of the alias. We don't do this in
+  // other situations as the alias and aliasee having differing types but same
+  // size may be intentional.
+  const GlobalObject *BaseObject = GA.getAliaseeObject();
+  if (MAI->hasDotTypeDotSizeDirective() && GA.getValueType()->isSized() &&
+      (!BaseObject || BaseObject->hasPrivateLinkage())) {
+    const DataLayout &DL = M.getDataLayout();
+    uint64_t Size = DL.getTypeAllocSize(GA.getValueType());
+    OutStreamer->emitELFSize(Name, MCConstantExpr::create(Size, OutContext));
   }
 }
 
+void AsmPrinter::emitGlobalIFunc(Module &M, const GlobalIFunc &GI) {
+  assert(!TM.getTargetTriple().isOSBinFormatXCOFF() &&
+         "IFunc is not supported on AIX.");
+
+  MCSymbol *Name = getSymbol(&GI);
+
+  if (GI.hasExternalLinkage() || !MAI->getWeakRefDirective())
+    OutStreamer->emitSymbolAttribute(Name, MCSA_Global);
+  else if (GI.hasWeakLinkage() || GI.hasLinkOnceLinkage())
+    OutStreamer->emitSymbolAttribute(Name, MCSA_WeakReference);
+  else
+    assert(GI.hasLocalLinkage() && "Invalid ifunc linkage");
+
+  OutStreamer->emitSymbolAttribute(Name, MCSA_ELF_TypeIndFunction);
+  emitVisibility(Name, GI.getVisibility());
+
+  // Emit the directives as assignments aka .set:
+  const MCExpr *Expr = lowerConstant(GI.getResolver());
+  OutStreamer->emitAssignment(Name, Expr);
+  MCSymbol *LocalAlias = getSymbolPreferLocal(GI);
+  if (LocalAlias != Name)
+    OutStreamer->emitAssignment(LocalAlias, Expr);
+}
+
 void AsmPrinter::emitRemarksSection(remarks::RemarkStreamer &RS) {
   if (!RS.needsSection())
     return;
@@ -1856,11 +1873,11 @@
       AliasStack.push_back(Cur);
     }
     for (const GlobalAlias *AncestorAlias : llvm::reverse(AliasStack))
-      emitGlobalIndirectSymbol(M, *AncestorAlias);
+      emitGlobalAlias(M, *AncestorAlias);
     AliasStack.clear();
   }
   for (const auto &IFunc : M.ifuncs())
-    emitGlobalIndirectSymbol(M, IFunc);
+    emitGlobalIFunc(M, IFunc);
 
   GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
   assert(MI && "AsmPrinter didn't require GCModuleInfo?");
Index: llvm/lib/IR/AsmWriter.cpp
===================================================================
--- llvm/lib/IR/AsmWriter.cpp
+++ llvm/lib/IR/AsmWriter.cpp
@@ -45,7 +45,6 @@
 #include "llvm/IR/Function.h"
 #include "llvm/IR/GlobalAlias.h"
 #include "llvm/IR/GlobalIFunc.h"
-#include "llvm/IR/GlobalIndirectSymbol.h"
 #include "llvm/IR/GlobalObject.h"
 #include "llvm/IR/GlobalValue.h"
 #include "llvm/IR/GlobalVariable.h"
@@ -2594,7 +2593,8 @@
 
   void printTypeIdentities();
   void printGlobal(const GlobalVariable *GV);
-  void printIndirectSymbol(const GlobalIndirectSymbol *GIS);
+  void printAlias(const GlobalAlias *GA);
+  void printIFunc(const GlobalIFunc *GI);
   void printComdat(const Comdat *C);
   void printFunction(const Function *F);
   void printArgument(const Argument *FA, AttributeSet Attrs);
@@ -2832,12 +2832,12 @@
   // Output all aliases.
   if (!M->alias_empty()) Out << "\n";
   for (const GlobalAlias &GA : M->aliases())
-    printIndirectSymbol(&GA);
+    printAlias(&GA);
 
   // Output all ifuncs.
   if (!M->ifunc_empty()) Out << "\n";
   for (const GlobalIFunc &GI : M->ifuncs())
-    printIndirectSymbol(&GI);
+    printIFunc(&GI);
 
   // Output all of the functions.
   for (const Function &F : *M) {
@@ -3566,50 +3566,76 @@
   printInfoComment(*GV);
 }
 
-void AssemblyWriter::printIndirectSymbol(const GlobalIndirectSymbol *GIS) {
-  if (GIS->isMaterializable())
+void AssemblyWriter::printAlias(const GlobalAlias *GA) {
+  if (GA->isMaterializable())
     Out << "; Materializable\n";
 
-  AsmWriterContext WriterCtx(&TypePrinter, &Machine, GIS->getParent());
-  WriteAsOperandInternal(Out, GIS, WriterCtx);
+  AsmWriterContext WriterCtx(&TypePrinter, &Machine, GA->getParent());
+  WriteAsOperandInternal(Out, GA, WriterCtx);
   Out << " = ";
 
-  Out << getLinkageNameWithSpace(GIS->getLinkage());
-  PrintDSOLocation(*GIS, Out);
-  PrintVisibility(GIS->getVisibility(), Out);
-  PrintDLLStorageClass(GIS->getDLLStorageClass(), Out);
-  PrintThreadLocalModel(GIS->getThreadLocalMode(), Out);
-  StringRef UA = getUnnamedAddrEncoding(GIS->getUnnamedAddr());
+  Out << getLinkageNameWithSpace(GA->getLinkage());
+  PrintDSOLocation(*GA, Out);
+  PrintVisibility(GA->getVisibility(), Out);
+  PrintDLLStorageClass(GA->getDLLStorageClass(), Out);
+  PrintThreadLocalModel(GA->getThreadLocalMode(), Out);
+  StringRef UA = getUnnamedAddrEncoding(GA->getUnnamedAddr());
   if (!UA.empty())
       Out << UA << ' ';
 
-  if (isa<GlobalAlias>(GIS))
-    Out << "alias ";
-  else if (isa<GlobalIFunc>(GIS))
-    Out << "ifunc ";
-  else
-    llvm_unreachable("Not an alias or ifunc!");
-
-  TypePrinter.print(GIS->getValueType(), Out);
+  Out << "alias ";
 
+  TypePrinter.print(GA->getValueType(), Out);
   Out << ", ";
 
-  const Constant *IS = GIS->getIndirectSymbol();
-
-  if (!IS) {
-    TypePrinter.print(GIS->getType(), Out);
+  if (const Constant *Aliasee = GA->getAliasee()) {
+    writeOperand(Aliasee, !isa<ConstantExpr>(Aliasee));
+  } else {
+    TypePrinter.print(GA->getType(), Out);
     Out << " <<NULL ALIASEE>>";
+  }
+
+  if (GA->hasPartition()) {
+    Out << ", partition \"";
+    printEscapedString(GA->getPartition(), Out);
+    Out << '"';
+  }
+
+  printInfoComment(*GA);
+  Out << '\n';
+}
+
+void AssemblyWriter::printIFunc(const GlobalIFunc *GI) {
+  if (GI->isMaterializable())
+    Out << "; Materializable\n";
+
+  AsmWriterContext WriterCtx(&TypePrinter, &Machine, GI->getParent());
+  WriteAsOperandInternal(Out, GI, WriterCtx);
+  Out << " = ";
+
+  Out << getLinkageNameWithSpace(GI->getLinkage());
+  PrintDSOLocation(*GI, Out);
+  PrintVisibility(GI->getVisibility(), Out);
+
+  Out << "ifunc ";
+
+  TypePrinter.print(GI->getValueType(), Out);
+  Out << ", ";
+
+  if (const Constant *Resolver = GI->getResolver()) {
+    writeOperand(Resolver, !isa<ConstantExpr>(Resolver));
   } else {
-    writeOperand(IS, !isa<ConstantExpr>(IS));
+    TypePrinter.print(GI->getType(), Out);
+    Out << " <<NULL RESOLVER>>";
   }
 
-  if (GIS->hasPartition()) {
+  if (GI->hasPartition()) {
     Out << ", partition \"";
-    printEscapedString(GIS->getPartition(), Out);
+    printEscapedString(GI->getPartition(), Out);
     Out << '"';
   }
 
-  printInfoComment(*GIS);
+  printInfoComment(*GI);
   Out << '\n';
 }
 
@@ -4600,8 +4626,12 @@
       W.printGlobal(V);
     else if (const Function *F = dyn_cast<Function>(GV))
       W.printFunction(F);
+    else if (const GlobalAlias *A = dyn_cast<GlobalAlias>(GV))
+      W.printAlias(A);
+    else if (const GlobalIFunc *I = dyn_cast<GlobalIFunc>(GV))
+      W.printIFunc(I);
     else
-      W.printIndirectSymbol(cast<GlobalIndirectSymbol>(GV));
+      llvm_unreachable("Unknown GlobalValue to print out!");
   } else if (const MetadataAsValue *V = dyn_cast<MetadataAsValue>(this)) {
     V->getMetadata()->print(ROS, MST, getModuleFromVal(V));
   } else if (const Constant *C = dyn_cast<Constant>(this)) {
Index: llvm/lib/IR/Globals.cpp
===================================================================
--- llvm/lib/IR/Globals.cpp
+++ llvm/lib/IR/Globals.cpp
@@ -235,7 +235,7 @@
     return F->empty() && !F->isMaterializable();
 
   // Aliases and ifuncs are always definitions.
-  assert(isa<GlobalIndirectSymbol>(this));
+  assert(isa<GlobalAlias>(this) || isa<GlobalIFunc>(this));
   return false;
 }
 
@@ -280,14 +280,44 @@
   return true;
 }
 
-const GlobalObject *GlobalValue::getAliaseeObject() const {
-  if (auto *GO = dyn_cast<GlobalObject>(this))
+static const GlobalObject *
+findBaseObject(const Constant *C, DenseSet<const GlobalAlias *> &Aliases) {
+  if (auto *GO = dyn_cast<GlobalObject>(C))
     return GO;
-  if (auto *GA = dyn_cast<GlobalAlias>(this))
-    return GA->getAliaseeObject();
+  if (auto *GA = dyn_cast<GlobalAlias>(C))
+    if (Aliases.insert(GA).second)
+      return findBaseObject(GA->getOperand(0), Aliases);
+  if (auto *CE = dyn_cast<ConstantExpr>(C)) {
+    switch (CE->getOpcode()) {
+    case Instruction::Add: {
+      auto *LHS = findBaseObject(CE->getOperand(0), Aliases);
+      auto *RHS = findBaseObject(CE->getOperand(1), Aliases);
+      if (LHS && RHS)
+        return nullptr;
+      return LHS ? LHS : RHS;
+    }
+    case Instruction::Sub: {
+      if (findBaseObject(CE->getOperand(1), Aliases))
+        return nullptr;
+      return findBaseObject(CE->getOperand(0), Aliases);
+    }
+    case Instruction::IntToPtr:
+    case Instruction::PtrToInt:
+    case Instruction::BitCast:
+    case Instruction::GetElementPtr:
+      return findBaseObject(CE->getOperand(0), Aliases);
+    default:
+      break;
+    }
+  }
   return nullptr;
 }
 
+const GlobalObject *GlobalValue::getAliaseeObject() const {
+  DenseSet<const GlobalAlias *> Aliases;
+  return findBaseObject(this, Aliases);
+}
+
 bool GlobalValue::isAbsoluteSymbolRef() const {
   auto *GO = dyn_cast<GlobalObject>(this);
   if (!GO)
@@ -420,50 +450,6 @@
   clearMetadata();
 }
 
-//===----------------------------------------------------------------------===//
-// GlobalIndirectSymbol Implementation
-//===----------------------------------------------------------------------===//
-
-GlobalIndirectSymbol::GlobalIndirectSymbol(Type *Ty, ValueTy VTy,
-    unsigned AddressSpace, LinkageTypes Linkage, const Twine &Name,
-    Constant *Symbol)
-    : GlobalValue(Ty, VTy, &Op<0>(), 1, Linkage, Name, AddressSpace) {
-    Op<0>() = Symbol;
-}
-
-static const GlobalObject *
-findBaseObject(const Constant *C, DenseSet<const GlobalAlias *> &Aliases) {
-  if (auto *GO = dyn_cast<GlobalObject>(C))
-    return GO;
-  if (auto *GA = dyn_cast<GlobalAlias>(C))
-    if (Aliases.insert(GA).second)
-      return findBaseObject(GA->getOperand(0), Aliases);
-  if (auto *CE = dyn_cast<ConstantExpr>(C)) {
-    switch (CE->getOpcode()) {
-    case Instruction::Add: {
-      auto *LHS = findBaseObject(CE->getOperand(0), Aliases);
-      auto *RHS = findBaseObject(CE->getOperand(1), Aliases);
-      if (LHS && RHS)
-        return nullptr;
-      return LHS ? LHS : RHS;
-    }
-    case Instruction::Sub: {
-      if (findBaseObject(CE->getOperand(1), Aliases))
-        return nullptr;
-      return findBaseObject(CE->getOperand(0), Aliases);
-    }
-    case Instruction::IntToPtr:
-    case Instruction::PtrToInt:
-    case Instruction::BitCast:
-    case Instruction::GetElementPtr:
-      return findBaseObject(CE->getOperand(0), Aliases);
-    default:
-      break;
-    }
-  }
-  return nullptr;
-}
-
 //===----------------------------------------------------------------------===//
 // GlobalAlias Implementation
 //===----------------------------------------------------------------------===//
@@ -471,8 +457,9 @@
 GlobalAlias::GlobalAlias(Type *Ty, unsigned AddressSpace, LinkageTypes Link,
                          const Twine &Name, Constant *Aliasee,
                          Module *ParentModule)
-    : GlobalIndirectSymbol(Ty, Value::GlobalAliasVal, AddressSpace, Link, Name,
-                           Aliasee) {
+    : GlobalValue(Ty, Value::GlobalAliasVal, &Op<0>(), 1, Link, Name,
+                  AddressSpace) {
+  setAliasee(Aliasee);
   if (ParentModule)
     ParentModule->getAliasList().push_back(this);
 }
@@ -516,7 +503,7 @@
 void GlobalAlias::setAliasee(Constant *Aliasee) {
   assert((!Aliasee || Aliasee->getType() == getType()) &&
          "Alias and aliasee types should match!");
-  setIndirectSymbol(Aliasee);
+  Op<0>().set(Aliasee);
 }
 
 const GlobalObject *GlobalAlias::getAliaseeObject() const {
@@ -531,8 +518,9 @@
 GlobalIFunc::GlobalIFunc(Type *Ty, unsigned AddressSpace, LinkageTypes Link,
                          const Twine &Name, Constant *Resolver,
                          Module *ParentModule)
-    : GlobalIndirectSymbol(Ty, Value::GlobalIFuncVal, AddressSpace, Link, Name,
-                           Resolver) {
+    : GlobalObject(Ty, Value::GlobalIFuncVal, &Op<0>(), 1, Link, Name,
+                   AddressSpace) {
+  setResolver(Resolver);
   if (ParentModule)
     ParentModule->getIFuncList().push_back(this);
 }
@@ -553,5 +541,5 @@
 
 const Function *GlobalIFunc::getResolverFunction() const {
   DenseSet<const GlobalAlias *> Aliases;
-  return cast<Function>(findBaseObject(getIndirectSymbol(), Aliases));
+  return cast<Function>(findBaseObject(getResolver(), Aliases));
 }
Index: llvm/lib/Linker/IRMover.cpp
===================================================================
--- llvm/lib/Linker/IRMover.cpp
+++ llvm/lib/Linker/IRMover.cpp
@@ -492,8 +492,8 @@
 
   void linkGlobalVariable(GlobalVariable &Dst, GlobalVariable &Src);
   Error linkFunctionBody(Function &Dst, Function &Src);
-  void linkIndirectSymbolBody(GlobalIndirectSymbol &Dst,
-                              GlobalIndirectSymbol &Src);
+  void linkAliasAliasee(GlobalAlias &Dst, GlobalAlias &Src);
+  void linkIFuncResolver(GlobalIFunc &Dst, GlobalIFunc &Src);
   Error linkGlobalValueBody(GlobalValue &Dst, GlobalValue &Src);
 
   /// Replace all types in the source AttributeList with the
@@ -504,7 +504,7 @@
   /// into the destination module.
   GlobalVariable *copyGlobalVariableProto(const GlobalVariable *SGVar);
   Function *copyFunctionProto(const Function *SF);
-  GlobalValue *copyGlobalIndirectSymbolProto(const GlobalIndirectSymbol *SGIS);
+  GlobalValue *copyIndirectSymbolProto(const GlobalValue *SGV);
 
   /// Perform "replace all uses with" operations. These work items need to be
   /// performed as part of materialization, but we postpone them to happen after
@@ -606,10 +606,14 @@
   } else if (auto *V = dyn_cast<GlobalVariable>(New)) {
     if (V->hasInitializer() || V->hasAppendingLinkage())
       return New;
-  } else {
-    auto *IS = cast<GlobalIndirectSymbol>(New);
-    if (IS->getIndirectSymbol())
+  } else if (auto *GA = dyn_cast<GlobalAlias>(New)) {
+    if (GA->getAliasee())
+      return New;
+  } else if (auto *GI = dyn_cast<GlobalIFunc>(New)) {
+    if (GI->getResolver())
       return New;
+  } else {
+    llvm_unreachable("Invalid GlobalValue type");
   }
 
   // If the global is being linked for an indirect symbol, it may have already
@@ -680,22 +684,28 @@
 
 /// Set up prototypes for any indirect symbols that come over from the source
 /// module.
-GlobalValue *
-IRLinker::copyGlobalIndirectSymbolProto(const GlobalIndirectSymbol *SGIS) {
+GlobalValue *IRLinker::copyIndirectSymbolProto(const GlobalValue *SGV) {
   // If there is no linkage to be performed or we're linking from the source,
   // bring over SGA.
-  auto *Ty = TypeMap.get(SGIS->getValueType());
-  GlobalIndirectSymbol *GIS;
-  if (isa<GlobalAlias>(SGIS))
-    GIS = GlobalAlias::create(Ty, SGIS->getAddressSpace(),
-                              GlobalValue::ExternalLinkage, SGIS->getName(),
-                              &DstM);
-  else
-    GIS = GlobalIFunc::create(Ty, SGIS->getAddressSpace(),
-                              GlobalValue::ExternalLinkage, SGIS->getName(),
-                              nullptr, &DstM);
-  GIS->copyAttributesFrom(SGIS);
-  return GIS;
+  auto *Ty = TypeMap.get(SGV->getValueType());
+
+  if (auto *GA = dyn_cast<GlobalAlias>(SGV)) {
+    auto *DGA = GlobalAlias::create(Ty, SGV->getAddressSpace(),
+                                    GlobalValue::ExternalLinkage,
+                                    SGV->getName(), &DstM);
+    DGA->copyAttributesFrom(GA);
+    return DGA;
+  }
+
+  if (auto *GI = dyn_cast<GlobalIFunc>(SGV)) {
+    auto *DGI = GlobalIFunc::create(Ty, SGV->getAddressSpace(),
+                                    GlobalValue::ExternalLinkage,
+                                    SGV->getName(), nullptr, &DstM);
+    DGI->copyAttributesFrom(GI);
+    return DGI;
+  }
+
+  llvm_unreachable("Invalid source global value type");
 }
 
 GlobalValue *IRLinker::copyGlobalValueProto(const GlobalValue *SGV,
@@ -707,7 +717,7 @@
     NewGV = copyFunctionProto(SF);
   } else {
     if (ForDefinition)
-      NewGV = copyGlobalIndirectSymbolProto(cast<GlobalIndirectSymbol>(SGV));
+      NewGV = copyIndirectSymbolProto(SGV);
     else if (SGV->getValueType()->isFunctionTy())
       NewGV =
           Function::Create(cast<FunctionType>(TypeMap.get(SGV->getValueType())),
@@ -1111,10 +1121,12 @@
   return Error::success();
 }
 
-void IRLinker::linkIndirectSymbolBody(GlobalIndirectSymbol &Dst,
-                                      GlobalIndirectSymbol &Src) {
-  Mapper.scheduleMapGlobalIndirectSymbol(Dst, *Src.getIndirectSymbol(),
-                                         IndirectSymbolMCID);
+void IRLinker::linkAliasAliasee(GlobalAlias &Dst, GlobalAlias &Src) {
+  Mapper.scheduleMapGlobalAlias(Dst, *Src.getAliasee(), IndirectSymbolMCID);
+}
+
+void IRLinker::linkIFuncResolver(GlobalIFunc &Dst, GlobalIFunc &Src) {
+  Mapper.scheduleMapGlobalIFunc(Dst, *Src.getResolver(), IndirectSymbolMCID);
 }
 
 Error IRLinker::linkGlobalValueBody(GlobalValue &Dst, GlobalValue &Src) {
@@ -1124,7 +1136,11 @@
     linkGlobalVariable(cast<GlobalVariable>(Dst), *GVar);
     return Error::success();
   }
-  linkIndirectSymbolBody(cast<GlobalIndirectSymbol>(Dst), cast<GlobalIndirectSymbol>(Src));
+  if (auto *GA = dyn_cast<GlobalAlias>(&Src)) {
+    linkAliasAliasee(cast<GlobalAlias>(Dst), *GA);
+    return Error::success();
+  }
+  linkIFuncResolver(cast<GlobalIFunc>(Dst), cast<GlobalIFunc>(Src));
   return Error::success();
 }
 
Index: llvm/lib/Object/ModuleSymbolTable.cpp
===================================================================
--- llvm/lib/Object/ModuleSymbolTable.cpp
+++ llvm/lib/Object/ModuleSymbolTable.cpp
@@ -204,8 +204,9 @@
     if (GVar->isConstant())
       Res |= BasicSymbolRef::SF_Const;
   }
-  if (isa_and_nonnull<Function>(GV->getAliaseeObject()) || isa<GlobalIFunc>(GV))
-    Res |= BasicSymbolRef::SF_Executable;
+  if (const GlobalObject *GO = GV->getAliaseeObject())
+    if (isa<Function>(GO) || isa<GlobalIFunc>(GO))
+      Res |= BasicSymbolRef::SF_Executable;
   if (isa<GlobalAlias>(GV))
     Res |= BasicSymbolRef::SF_Indirect;
   if (GV->hasPrivateLinkage())
Index: llvm/lib/Transforms/IPO/LowerTypeTests.cpp
===================================================================
--- llvm/lib/Transforms/IPO/LowerTypeTests.cpp
+++ llvm/lib/Transforms/IPO/LowerTypeTests.cpp
@@ -342,7 +342,8 @@
 struct ScopedSaveAliaseesAndUsed {
   Module &M;
   SmallVector<GlobalValue *, 4> Used, CompilerUsed;
-  std::vector<std::pair<GlobalIndirectSymbol *, Function *>> FunctionAliases;
+  std::vector<std::pair<GlobalAlias *, Function *>> FunctionAliases;
+  std::vector<std::pair<GlobalIFunc *, Function *>> ResolverIFuncs;
 
   ScopedSaveAliaseesAndUsed(Module &M) : M(M) {
     // The users of this class want to replace all function references except
@@ -362,12 +363,16 @@
     if (GlobalVariable *GV = collectUsedGlobalVariables(M, CompilerUsed, true))
       GV->eraseFromParent();
 
-    for (auto &GIS : concat<GlobalIndirectSymbol>(M.aliases(), M.ifuncs())) {
+    for (auto &GA : M.aliases()) {
       // FIXME: This should look past all aliases not just interposable ones,
       // see discussion on D65118.
-      if (auto *F =
-              dyn_cast<Function>(GIS.getIndirectSymbol()->stripPointerCasts()))
-        FunctionAliases.push_back({&GIS, F});
+      if (auto *F = dyn_cast<Function>(GA.getAliasee()->stripPointerCasts()))
+        FunctionAliases.push_back({&GA, F});
+    }
+
+    for (auto &GI : M.ifuncs()) {
+      if (auto *F = dyn_cast<Function>(GI.getResolver()->stripPointerCasts()))
+        ResolverIFuncs.push_back({&GI, F});
     }
   }
 
@@ -376,8 +381,15 @@
     appendToCompilerUsed(M, CompilerUsed);
 
     for (auto P : FunctionAliases)
-      P.first->setIndirectSymbol(
+      P.first->setAliasee(
           ConstantExpr::getBitCast(P.second, P.first->getType()));
+
+    for (auto P : ResolverIFuncs) {
+      // This does not preserve pointer casts that may have been stripped by the
+      // constructor, but the resolver's type is different from that of the
+      // ifunc anyway.
+      P.first->setResolver(P.second);
+    }
   }
 };
 
Index: llvm/lib/Transforms/Utils/SplitModule.cpp
===================================================================
--- llvm/lib/Transforms/Utils/SplitModule.cpp
+++ llvm/lib/Transforms/Utils/SplitModule.cpp
@@ -24,7 +24,6 @@
 #include "llvm/IR/Function.h"
 #include "llvm/IR/GlobalAlias.h"
 #include "llvm/IR/GlobalObject.h"
-#include "llvm/IR/GlobalIndirectSymbol.h"
 #include "llvm/IR/GlobalValue.h"
 #include "llvm/IR/GlobalVariable.h"
 #include "llvm/IR/Instruction.h"
@@ -65,9 +64,8 @@
   if (const Instruction *I = dyn_cast<Instruction>(U)) {
     const GlobalValue *F = I->getParent()->getParent();
     GVtoClusterMap.unionSets(GV, F);
-  } else if (isa<GlobalIndirectSymbol>(U) || isa<Function>(U) ||
-             isa<GlobalVariable>(U)) {
-    GVtoClusterMap.unionSets(GV, cast<GlobalValue>(U));
+  } else if (const GlobalValue *GVU = dyn_cast<GlobalValue>(U)) {
+    GVtoClusterMap.unionSets(GV, GVU);
   } else {
     llvm_unreachable("Underimplemented use case");
   }
@@ -91,6 +89,14 @@
   }
 }
 
+static const GlobalObject *getGVPartitioningRoot(const GlobalValue *GV)
+{
+  const GlobalObject *GO = GV->getAliaseeObject();
+  if (const auto *GI = dyn_cast_or_null<GlobalIFunc>(GO))
+    GO = GI->getResolverFunction();
+  return GO;
+}
+
 // Find partitions for module in the way that no locals need to be
 // globalized.
 // Try to balance pack those partitions into N files since this roughly equals
@@ -123,14 +129,11 @@
         Member = &GV;
     }
 
-    // For aliases we should not separate them from their aliasees regardless
-    // of linkage.
-    if (auto *GIS = dyn_cast<GlobalAlias>(&GV)) {
-      if (const GlobalObject *Aliasee = GIS->getAliaseeObject())
-        GVtoClusterMap.unionSets(&GV, Aliasee);
-    } else if (auto *GIS = dyn_cast<GlobalIFunc>(&GV)) {
-      GVtoClusterMap.unionSets(&GV, GIS->getResolverFunction());
-    }
+    // Aliases should not be separated from their aliasees and ifuncs should
+    // not be separated from their resolvers regardless of linkage.
+    if (const GlobalObject *Root = getGVPartitioningRoot(&GV))
+      if (&GV != Root)
+        GVtoClusterMap.unionSets(&GV, Root);
 
     if (const Function *F = dyn_cast<Function>(&GV)) {
       for (const BasicBlock &BB : *F) {
@@ -227,12 +230,8 @@
 
 // Returns whether GV should be in partition (0-based) I of N.
 static bool isInPartition(const GlobalValue *GV, unsigned I, unsigned N) {
-  if (auto *GIS = dyn_cast<GlobalAlias>(GV)) {
-    if (const GlobalObject *Base = GIS->getAliaseeObject())
-      GV = Base;
-  } else if (auto *GIS = dyn_cast<GlobalIFunc>(GV)) {
-    GV = GIS->getResolverFunction();
-  }
+  if (const GlobalObject *Root = getGVPartitioningRoot(GV))
+    GV = Root;
 
   StringRef Name;
   if (const Comdat *C = GV->getComdat())
Index: llvm/lib/Transforms/Utils/ValueMapper.cpp
===================================================================
--- llvm/lib/Transforms/Utils/ValueMapper.cpp
+++ llvm/lib/Transforms/Utils/ValueMapper.cpp
@@ -26,7 +26,8 @@
 #include "llvm/IR/DebugInfoMetadata.h"
 #include "llvm/IR/DerivedTypes.h"
 #include "llvm/IR/Function.h"
-#include "llvm/IR/GlobalIndirectSymbol.h"
+#include "llvm/IR/GlobalAlias.h"
+#include "llvm/IR/GlobalIFunc.h"
 #include "llvm/IR/GlobalObject.h"
 #include "llvm/IR/GlobalVariable.h"
 #include "llvm/IR/InlineAsm.h"
@@ -68,7 +69,7 @@
   enum EntryKind {
     MapGlobalInit,
     MapAppendingVar,
-    MapGlobalIndirectSymbol,
+    MapAliasOrIFunc,
     RemapFunction
   };
   struct GVInitTy {
@@ -79,8 +80,8 @@
     GlobalVariable *GV;
     Constant *InitPrefix;
   };
-  struct GlobalIndirectSymbolTy {
-    GlobalIndirectSymbol *GIS;
+  struct AliasOrIFuncTy {
+    GlobalValue *GV;
     Constant *Target;
   };
 
@@ -91,7 +92,7 @@
   union {
     GVInitTy GVInit;
     AppendingGVTy AppendingGV;
-    GlobalIndirectSymbolTy GlobalIndirectSymbol;
+    AliasOrIFuncTy AliasOrIFunc;
     Function *RemapF;
   } Data;
 };
@@ -163,8 +164,8 @@
                                     bool IsOldCtorDtor,
                                     ArrayRef<Constant *> NewMembers,
                                     unsigned MCID);
-  void scheduleMapGlobalIndirectSymbol(GlobalIndirectSymbol &GIS, Constant &Target,
-                                       unsigned MCID);
+  void scheduleMapAliasOrIFunc(GlobalValue &GV, Constant &Target,
+                               unsigned MCID);
   void scheduleRemapFunction(Function &F, unsigned MCID);
 
   void flush();
@@ -873,10 +874,17 @@
                            E.AppendingGVIsOldCtorDtor, makeArrayRef(NewInits));
       break;
     }
-    case WorklistEntry::MapGlobalIndirectSymbol:
-      E.Data.GlobalIndirectSymbol.GIS->setIndirectSymbol(
-          mapConstant(E.Data.GlobalIndirectSymbol.Target));
+    case WorklistEntry::MapAliasOrIFunc: {
+      GlobalValue *GV = E.Data.AliasOrIFunc.GV;
+      Constant *Target = mapConstant(E.Data.AliasOrIFunc.Target);
+      if (auto *GA = dyn_cast<GlobalAlias>(GV))
+        GA->setAliasee(Target);
+      else if (auto *GI = dyn_cast<GlobalIFunc>(GV))
+        GI->setResolver(Target);
+      else
+        llvm_unreachable("Not alias or ifunc");
       break;
+    }
     case WorklistEntry::RemapFunction:
       remapFunction(*E.Data.RemapF);
       break;
@@ -1069,16 +1077,18 @@
   AppendingInits.append(NewMembers.begin(), NewMembers.end());
 }
 
-void Mapper::scheduleMapGlobalIndirectSymbol(GlobalIndirectSymbol &GIS,
-                                             Constant &Target, unsigned MCID) {
-  assert(AlreadyScheduled.insert(&GIS).second && "Should not reschedule");
+void Mapper::scheduleMapAliasOrIFunc(GlobalValue &GV, Constant &Target,
+                                     unsigned MCID) {
+  assert(AlreadyScheduled.insert(&GV).second && "Should not reschedule");
+  assert((isa<GlobalAlias>(GV) || isa<GlobalIFunc>(GV)) &&
+         "Should be alias or ifunc");
   assert(MCID < MCs.size() && "Invalid mapping context");
 
   WorklistEntry WE;
-  WE.Kind = WorklistEntry::MapGlobalIndirectSymbol;
+  WE.Kind = WorklistEntry::MapAliasOrIFunc;
   WE.MCID = MCID;
-  WE.Data.GlobalIndirectSymbol.GIS = &GIS;
-  WE.Data.GlobalIndirectSymbol.Target = &Target;
+  WE.Data.AliasOrIFunc.GV = &GV;
+  WE.Data.AliasOrIFunc.Target = &Target;
   Worklist.push_back(WE);
 }
 
@@ -1175,10 +1185,14 @@
       GV, InitPrefix, IsOldCtorDtor, NewMembers, MCID);
 }
 
-void ValueMapper::scheduleMapGlobalIndirectSymbol(GlobalIndirectSymbol &GIS,
-                                                  Constant &Target,
-                                                  unsigned MCID) {
-  getAsMapper(pImpl)->scheduleMapGlobalIndirectSymbol(GIS, Target, MCID);
+void ValueMapper::scheduleMapGlobalAlias(GlobalAlias &GA, Constant &Aliasee,
+                                         unsigned MCID) {
+  getAsMapper(pImpl)->scheduleMapAliasOrIFunc(GA, Aliasee, MCID);
+}
+
+void ValueMapper::scheduleMapGlobalIFunc(GlobalIFunc &GI, Constant &Resolver,
+                                         unsigned MCID) {
+  getAsMapper(pImpl)->scheduleMapAliasOrIFunc(GI, Resolver, MCID);
 }
 
 void ValueMapper::scheduleRemapFunction(Function &F, unsigned MCID) {
Index: llvm/unittests/IR/ConstantsTest.cpp
===================================================================
--- llvm/unittests/IR/ConstantsTest.cpp
+++ llvm/unittests/IR/ConstantsTest.cpp
@@ -385,7 +385,7 @@
       new GlobalVariable(*M, PtrTy, false, GlobalValue::ExternalLinkage, GEP);
   ASSERT_EQ(GEP, Ref->getInitializer());
 
-  auto *Global = new GlobalVariable(*M, PtrTy, false,
+  auto *Global = new GlobalVariable(*M, IntTy, false,
                                     GlobalValue::ExternalLinkage, nullptr);
   auto *Alias = GlobalAlias::create(IntTy, 0, GlobalValue::ExternalLinkage,
                                     "alias", Global, M.get());