Index: docs/BitCodeFormat.rst
===================================================================
--- docs/BitCodeFormat.rst
+++ docs/BitCodeFormat.rst
@@ -1140,7 +1140,7 @@
 * *address space*: If supplied, the target-specific numbered address space where
   the pointed-to object resides. Otherwise, the default address space is zero.
 
-TYPE_CODE_FUNCTION_OLD Record
+TYPE_CODE_FUNCTION_VERY_OLD Record
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 .. note::
@@ -1148,9 +1148,9 @@
   earlier. It is guaranteed to be understood by the current LLVM version, as
   specified in the :ref:`IR backwards compatibility` policy.
 
-``[FUNCTION_OLD, vararg, ignored, retty, ...paramty... ]``
+``[FUNCTION_VERY_OLD, vararg, ignored, retty, ...paramty... ]``
 
-The ``FUNCTION_OLD`` record (code 9) adds a function type to the type table.
+The ``FUNCTION_VERY_OLD`` record (code 9) adds a function type to the type table.
 The operand fields are
 
 * *vararg*: Non-zero if the type represents a varargs function
@@ -1163,6 +1163,8 @@
 * *paramty*: Zero or more type indices representing the parameter types of the
   function
 
+FIXME: Add docs for new record type
+
 TYPE_CODE_ARRAY Record
 ^^^^^^^^^^^^^^^^^^^^^^
 
@@ -1261,12 +1263,14 @@
 * *eltty*: Zero or more type indices representing the element types of the
   structure
 
-TYPE_CODE_FUNCTION Record
+TYPE_CODE_FUNCTION_OLD Record
 ^^^^^^^^^^^^^^^^^^^^^^^^^
 
-``[FUNCTION, vararg, retty, ...paramty... ]``
+``[FUNCTION_OLD, vararg, retty, ...paramty... ]``
+
+FIXME: add a note about legacy
 
-The ``FUNCTION`` record (code 21) adds a function type to the type table. The
+The ``FUNCTION_OLD`` record (code 21) adds a function type to the type table. The
 operand fields are
 
 * *vararg*: Non-zero if the type represents a varargs function
Index: docs/LangRef.rst
===================================================================
--- docs/LangRef.rst
+++ docs/LangRef.rst
@@ -1869,8 +1869,15 @@
     must be a multiple of 8-bits. If omitted, the natural stack
     alignment defaults to "unspecified", which does not prevent any
     alignment promotions.
+``P<address space>``
+    Specifies the address space that corresponds to program memory.
+    Harvard architectures can use this to specify what space LLVM
+    should place things such as functions or switch lookup tables
+    into. If omitted, the program memory space defaults to the
+    default address space of 0, which corresponds to a Von Neumann
+    architecture that has code and data in the same space.
 ``A<address space>``
-    Specifies the address space of  objects created by '``alloca``'.
+    Specifies the address space of objects created by '``alloca``'.
     Defaults to the default address space of 0.
 ``p[n]:<size>:<abi>:<pref>``
     This specifies the *size* of a pointer and its ``<abi>`` and
Index: include/llvm/Bitcode/LLVMBitCodes.h
===================================================================
--- include/llvm/Bitcode/LLVMBitCodes.h
+++ include/llvm/Bitcode/LLVMBitCodes.h
@@ -142,8 +142,8 @@
   TYPE_CODE_INTEGER = 7, // INTEGER: [width]
   TYPE_CODE_POINTER = 8, // POINTER: [pointee type]
 
-  TYPE_CODE_FUNCTION_OLD = 9, // FUNCTION: [vararg, attrid, retty,
-                              //            paramty x N]
+  TYPE_CODE_FUNCTION_VERY_OLD = 9, // FUNCTION: [vararg, attrid, retty,
+                                   //            paramty x N]
 
   TYPE_CODE_HALF = 10, // HALF
 
@@ -165,9 +165,10 @@
   TYPE_CODE_STRUCT_NAME = 19,  // STRUCT_NAME: [strchr x N]
   TYPE_CODE_STRUCT_NAMED = 20, // STRUCT_NAMED: [ispacked, eltty x N]
 
-  TYPE_CODE_FUNCTION = 21, // FUNCTION: [vararg, retty, paramty x N]
+  TYPE_CODE_FUNCTION_OLD = 21, // FUNCTION: [vararg, retty, paramty x N]
 
-  TYPE_CODE_TOKEN = 22 // TOKEN
+  TYPE_CODE_TOKEN = 22, // TOKEN
+  TYPE_CODE_FUNCTION = 23 // FUNCTION: [vararg, addrspace, retty, paramty x N]
 };
 
 enum OperandBundleTagCode {
Index: include/llvm/IR/DataLayout.h
===================================================================
--- include/llvm/IR/DataLayout.h
+++ include/llvm/IR/DataLayout.h
@@ -113,6 +113,7 @@
 
   unsigned AllocaAddrSpace;
   unsigned StackNaturalAlign;
+  unsigned ProgramAddrSpace;
 
   enum ManglingModeT {
     MM_None,
@@ -196,6 +197,7 @@
     BigEndian = DL.isBigEndian();
     AllocaAddrSpace = DL.AllocaAddrSpace;
     StackNaturalAlign = DL.StackNaturalAlign;
+    ProgramAddrSpace = DL.ProgramAddrSpace;
     ManglingMode = DL.ManglingMode;
     LegalIntWidths = DL.LegalIntWidths;
     Alignments = DL.Alignments;
@@ -252,6 +254,8 @@
   unsigned getStackAlignment() const { return StackNaturalAlign; }
   unsigned getAllocaAddrSpace() const { return AllocaAddrSpace; }
 
+  unsigned getProgramAddressSpace() const { return ProgramAddrSpace; }
+
   bool hasMicrosoftFastStdCallMangling() const {
     return ManglingMode == MM_WinCOFFX86;
   }
Index: include/llvm/IR/DerivedTypes.h
===================================================================
--- include/llvm/IR/DerivedTypes.h
+++ include/llvm/IR/DerivedTypes.h
@@ -49,10 +49,11 @@
   /// This enum is just used to hold constants we need for IntegerType.
   enum {
     MIN_INT_BITS = 1,        ///< Minimum number of bits that can be specified
-    MAX_INT_BITS = (1<<24)-1 ///< Maximum number of bits that can be specified
-      ///< Note that bit width is stored in the Type classes SubclassData field
-      ///< which has 24 bits. This yields a maximum bit width of 16,777,215
-      ///< bits.
+    /// Maximum number of bits that can be specified
+    /// Note that bit width is stored in the Type classes SubclassData field
+    /// which has 24 bits. This yields a maximum bit width of 16,777,215
+    /// bits.
+    MAX_INT_BITS = (1<<SUBCLASS_DATA_BITS)-1
   };
 
   /// This static method is the primary way of constructing an IntegerType.
@@ -101,7 +102,8 @@
 /// Class to represent function types
 ///
 class FunctionType : public Type {
-  FunctionType(Type *Result, ArrayRef<Type*> Params, bool IsVarArgs);
+  FunctionType(Type *Result, ArrayRef<Type*> Params, bool IsVarArgs,
+               unsigned AddrSpace);
 
 public:
   FunctionType(const FunctionType &) = delete;
@@ -109,10 +111,11 @@
 
   /// This static method is the primary way of constructing a FunctionType.
   static FunctionType *get(Type *Result,
-                           ArrayRef<Type*> Params, bool isVarArg);
+                           ArrayRef<Type*> Params, bool isVarArg,
+                           unsigned AddrSpace);
 
   /// Create a FunctionType taking no parameters.
-  static FunctionType *get(Type *Result, bool isVarArg);
+  static FunctionType *get(Type *Result, bool isVarArg, unsigned AddrSpace);
 
   /// Return true if the specified type is valid as a return type.
   static bool isValidReturnType(Type *RetTy);
@@ -120,7 +123,15 @@
   /// Return true if the specified type is valid as an argument type.
   static bool isValidArgumentType(Type *ArgTy);
 
-  bool isVarArg() const { return getSubclassData()!=0; }
+  bool isVarArg() const {
+    return (getSubclassData() & 1) != 0;
+  }
+
+  unsigned getAddressSpace() const {
+    unsigned Mask = ~1;
+    return (getSubclassData() & Mask) >> 1;
+  }
+
   Type *getReturnType() const { return ContainedTys[0]; }
 
   using param_iterator = Type::subtype_iterator;
Index: include/llvm/IR/Function.h
===================================================================
--- include/llvm/IR/Function.h
+++ include/llvm/IR/Function.h
@@ -149,6 +149,9 @@
   /// arguments.
   bool isVarArg() const { return getFunctionType()->isVarArg(); }
 
+  /// Gets the address space that the function resides in.
+  unsigned getAddressSpace() const { return getFunctionType()->getAddressSpace(); }
+
   bool isMaterializable() const {
     return getGlobalObjectSubClassData() & (1 << IsMaterializableBit);
   }
Index: include/llvm/IR/GlobalValue.h
===================================================================
--- include/llvm/IR/GlobalValue.h
+++ include/llvm/IR/GlobalValue.h
@@ -177,6 +177,7 @@
   GlobalValue(const GlobalValue &) = delete;
 
   unsigned getAlignment() const;
+  unsigned getAddressSpace() const;
 
   enum class UnnamedAddr {
     None,
Index: include/llvm/IR/Module.h
===================================================================
--- include/llvm/IR/Module.h
+++ include/llvm/IR/Module.h
@@ -343,7 +343,8 @@
   {
     SmallVector<Type*, sizeof...(ArgsTy)> ArgTys{Args...};
     return getOrInsertFunction(Name,
-                               FunctionType::get(RetTy, ArgTys, false),
+                               FunctionType::get(RetTy, ArgTys, false,
+                               DL.getProgramAddressSpace()),
                                AttributeList);
   }
 
Index: include/llvm/IR/Type.h
===================================================================
--- include/llvm/IR/Type.h
+++ include/llvm/IR/Type.h
@@ -26,6 +26,10 @@
 #include <cstdint>
 #include <iterator>
 
+// The width of the integer field that type subclasses can
+// use for arbitrary information.
+#define SUBCLASS_DATA_BITS 24
+
 namespace llvm {
 
 template<class GraphType> struct GraphTraits;
@@ -80,10 +84,10 @@
   /// This refers to the LLVMContext in which this type was uniqued.
   LLVMContext &Context;
 
-  TypeID   ID : 8;            // The current base type of this type.
-  unsigned SubclassData : 24; // Space for subclasses to store data.
-                              // Note that this should be synchronized with
-                              // MAX_INT_BITS value in IntegerType class.
+  // The current base type of this type.
+  TypeID   ID : 8;
+  // Space for subclasses to store data.
+  unsigned SubclassData : SUBCLASS_DATA_BITS;
 
 protected:
   friend class LLVMContextImpl;
Index: include/llvm/IR/TypeBuilder.h
===================================================================
--- include/llvm/IR/TypeBuilder.h
+++ include/llvm/IR/TypeBuilder.h
@@ -19,6 +19,8 @@
 #include "llvm/IR/LLVMContext.h"
 #include <climits>
 
+// FIXME: we probably need to update this for func addr space
+
 namespace llvm {
 
 /// TypeBuilder - This provides a uniform API for looking up types
@@ -255,7 +257,9 @@
 template<typename R, bool cross> class TypeBuilder<R(), cross> {
 public:
   static FunctionType *get(LLVMContext &Context) {
-    return FunctionType::get(TypeBuilder<R, cross>::get(Context), false);
+    unsigned AddrSpace = 0; // FIXME: don't assume this
+    return FunctionType::get(TypeBuilder<R, cross>::get(Context), false,
+                             AddrSpace);
   }
 };
 template<typename R, typename A1, bool cross> class TypeBuilder<R(A1), cross> {
@@ -264,8 +268,9 @@
     Type *params[] = {
       TypeBuilder<A1, cross>::get(Context),
     };
+    unsigned AddrSpace = 0; // FIXME: don't assume this
     return FunctionType::get(TypeBuilder<R, cross>::get(Context),
-                             params, false);
+                             params, false, AddrSpace);
   }
 };
 template<typename R, typename A1, typename A2, bool cross>
@@ -276,8 +281,9 @@
       TypeBuilder<A1, cross>::get(Context),
       TypeBuilder<A2, cross>::get(Context),
     };
+    unsigned AddrSpace = 0; // FIXME: don't assume this
     return FunctionType::get(TypeBuilder<R, cross>::get(Context),
-                             params, false);
+                             params, false, AddrSpace);
   }
 };
 template<typename R, typename A1, typename A2, typename A3, bool cross>
@@ -289,8 +295,9 @@
       TypeBuilder<A2, cross>::get(Context),
       TypeBuilder<A3, cross>::get(Context),
     };
+    unsigned AddrSpace = 0; // FIXME: don't assume this
     return FunctionType::get(TypeBuilder<R, cross>::get(Context),
-                             params, false);
+                             params, false, AddrSpace);
   }
 };
 
@@ -305,8 +312,9 @@
       TypeBuilder<A3, cross>::get(Context),
       TypeBuilder<A4, cross>::get(Context),
     };
+    unsigned AddrSpace = 0; // FIXME: don't assume this
     return FunctionType::get(TypeBuilder<R, cross>::get(Context),
-                             params, false);
+                             params, false, AddrSpace);
   }
 };
 
@@ -322,15 +330,18 @@
       TypeBuilder<A4, cross>::get(Context),
       TypeBuilder<A5, cross>::get(Context),
     };
+    unsigned AddrSpace = 0; // FIXME: don't assume this
     return FunctionType::get(TypeBuilder<R, cross>::get(Context),
-                             params, false);
+                             params, false, AddrSpace);
   }
 };
 
 template<typename R, bool cross> class TypeBuilder<R(...), cross> {
 public:
   static FunctionType *get(LLVMContext &Context) {
-    return FunctionType::get(TypeBuilder<R, cross>::get(Context), true);
+    unsigned AddrSpace = 0; // FIXME: don't assume this
+    return FunctionType::get(TypeBuilder<R, cross>::get(Context), true,
+                             AddrSpace);
   }
 };
 template<typename R, typename A1, bool cross>
@@ -340,7 +351,8 @@
     Type *params[] = {
       TypeBuilder<A1, cross>::get(Context),
     };
-    return FunctionType::get(TypeBuilder<R, cross>::get(Context), params, true);
+    unsigned AddrSpace = 0; // FIXME: don't assume this
+    return FunctionType::get(TypeBuilder<R, cross>::get(Context), params, true, AddrSpace);
   }
 };
 template<typename R, typename A1, typename A2, bool cross>
@@ -351,8 +363,9 @@
       TypeBuilder<A1, cross>::get(Context),
       TypeBuilder<A2, cross>::get(Context),
     };
+    unsigned AddrSpace = 0; // FIXME: don't assume this
     return FunctionType::get(TypeBuilder<R, cross>::get(Context),
-                                   params, true);
+                                   params, true, AddrSpace);
   }
 };
 template<typename R, typename A1, typename A2, typename A3, bool cross>
@@ -364,8 +377,9 @@
       TypeBuilder<A2, cross>::get(Context),
       TypeBuilder<A3, cross>::get(Context),
     };
+    unsigned AddrSpace = 0; // FIXME: don't assume this
     return FunctionType::get(TypeBuilder<R, cross>::get(Context),
-                                   params, true);
+                                   params, true, AddrSpace);
   }
 };
 
@@ -380,8 +394,9 @@
       TypeBuilder<A3, cross>::get(Context),
       TypeBuilder<A4, cross>::get(Context),
     };
+    unsigned AddrSpace = 0; // FIXME: don't assume this
     return FunctionType::get(TypeBuilder<R, cross>::get(Context),
-                             params, true);
+                             params, true, AddrSpace);
   }
 };
 
@@ -397,8 +412,9 @@
       TypeBuilder<A4, cross>::get(Context),
       TypeBuilder<A5, cross>::get(Context),
     };
+    unsigned AddrSpace = 0; // FIXME: don't assume this
     return FunctionType::get(TypeBuilder<R, cross>::get(Context),
-                                   params, true);
+                                   params, true, AddrSpace);
   }
 };
 
Index: lib/AsmParser/LLParser.cpp
===================================================================
--- lib/AsmParser/LLParser.cpp
+++ lib/AsmParser/LLParser.cpp
@@ -2334,10 +2334,12 @@
 }
 
 /// ParseFunctionType
-///  ::= Type ArgumentList OptionalAttrs
+///  ::= Type ArgumentList OptionalAddrSpace OptionalAttrs
 bool LLParser::ParseFunctionType(Type *&Result) {
   assert(Lex.getKind() == lltok::lparen);
 
+  const DataLayout &DL = M->getDataLayout();
+
   if (!FunctionType::isValidReturnType(Result))
     return TokError("invalid function return type");
 
@@ -2346,6 +2348,10 @@
   if (ParseArgumentList(ArgList, isVarArg))
     return true;
 
+  unsigned AddrSpace = DL.getProgramAddressSpace();
+  if (ParseOptionalAddrSpace(AddrSpace))
+    return true;
+
   // Reject names on the arguments lists.
   for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
     if (!ArgList[i].Name.empty())
@@ -2359,7 +2365,7 @@
   for (unsigned i = 0, e = ArgList.size(); i != e; ++i)
     ArgListTy.push_back(ArgList[i].Ty);
 
-  Result = FunctionType::get(Result, ArgListTy, isVarArg);
+  Result = FunctionType::get(Result, ArgListTy, isVarArg, AddrSpace);
   return false;
 }
 
@@ -4700,6 +4706,9 @@
   bool HasLinkage;
   Type *RetType = nullptr;
   LocTy RetTypeLoc = Lex.getLoc();
+
+  const DataLayout &DL = M->getDataLayout();
+
   if (ParseOptionalLinkage(Linkage, HasLinkage, Visibility, DLLStorageClass) ||
       ParseOptionalCallingConv(CC) || ParseOptionalReturnAttrs(RetAttrs) ||
       ParseType(RetType, RetTypeLoc, true /*void allowed*/))
@@ -4765,6 +4774,7 @@
   std::string GC;
   GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None;
   LocTy UnnamedAddrLoc;
+  unsigned AddrSpace = DL.getProgramAddressSpace();
   Constant *Prefix = nullptr;
   Constant *Prologue = nullptr;
   Constant *PersonalityFn = nullptr;
@@ -4772,6 +4782,7 @@
 
   if (ParseArgumentList(ArgList, isVarArg) ||
       ParseOptionalUnnamedAddr(UnnamedAddr) ||
+      ParseOptionalAddrSpace(AddrSpace) ||
       ParseFnAttributeValuePairs(FuncAttrs, FwdRefAttrGrps, false,
                                  BuiltinLoc) ||
       (EatIfPresent(lltok::kw_section) &&
@@ -4815,7 +4826,7 @@
     return Error(RetTypeLoc, "functions with 'sret' argument must return void");
 
   FunctionType *FT =
-    FunctionType::get(RetType, ParamTypeList, isVarArg);
+    FunctionType::get(RetType, ParamTypeList, isVarArg, AddrSpace);
   PointerType *PFT = PointerType::getUnqual(FT);
 
   Fn = nullptr;
@@ -5383,6 +5394,9 @@
   SmallVector<OperandBundleDef, 2> BundleList;
 
   BasicBlock *NormalBB, *UnwindBB;
+
+  const DataLayout &DL = M->getDataLayout();
+
   if (ParseOptionalCallingConv(CC) || ParseOptionalReturnAttrs(RetAttrs) ||
       ParseType(RetType, RetTypeLoc, true /*void allowed*/) ||
       ParseValID(CalleeID) || ParseParameterList(ArgList, PFS) ||
@@ -5408,7 +5422,8 @@
     if (!FunctionType::isValidReturnType(RetType))
       return Error(RetTypeLoc, "Invalid result type for LLVM function");
 
-    Ty = FunctionType::get(RetType, ParamTypes, false);
+    Ty = FunctionType::get(RetType, ParamTypes, false,
+                           DL.getProgramAddressSpace());
   }
 
   CalleeID.FTy = Ty;
@@ -5967,6 +5982,8 @@
   SmallVector<OperandBundleDef, 2> BundleList;
   LocTy CallLoc = Lex.getLoc();
 
+  const DataLayout &DL = M->getDataLayout();
+
   if (TCK != CallInst::TCK_None &&
       ParseToken(lltok::kw_call,
                  "expected 'tail call', 'musttail call', or 'notail call'"))
@@ -6000,7 +6017,8 @@
     if (!FunctionType::isValidReturnType(RetType))
       return Error(RetTypeLoc, "Invalid result type for LLVM function");
 
-    Ty = FunctionType::get(RetType, ParamTypes, false);
+    Ty = FunctionType::get(RetType, ParamTypes, false,
+                           DL.getProgramAddressSpace());
   }
 
   CalleeID.FTy = Ty;
Index: lib/Bitcode/Reader/BitcodeReader.cpp
===================================================================
--- lib/Bitcode/Reader/BitcodeReader.cpp
+++ lib/Bitcode/Reader/BitcodeReader.cpp
@@ -1578,9 +1578,9 @@
       ResultTy = PointerType::get(ResultTy, AddressSpace);
       break;
     }
-    case bitc::TYPE_CODE_FUNCTION_OLD: {
+    case bitc::TYPE_CODE_FUNCTION_VERY_OLD: {
       // FIXME: attrid is dead, remove it in LLVM 4.0
-      // FUNCTION: [vararg, attrid, retty, paramty x N]
+      // FUNCTION_VERY_OLD: [vararg, attrid, retty, paramty x N]
       if (Record.size() < 3)
         return error("Invalid record");
       SmallVector<Type*, 8> ArgTys;
@@ -1595,11 +1595,14 @@
       if (!ResultTy || ArgTys.size() < Record.size()-3)
         return error("Invalid type");
 
-      ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
+      // We can assume that address space is zero here because no backend
+      // supported non-default address spaces on functions prior to release 5.0.
+      unsigned AddrSpace = 0;
+      ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0], AddrSpace);
       break;
     }
-    case bitc::TYPE_CODE_FUNCTION: {
-      // FUNCTION: [vararg, retty, paramty x N]
+    case bitc::TYPE_CODE_FUNCTION_OLD: {
+      // FUNCTION_OLD: [vararg, retty, paramty x N]
       if (Record.size() < 2)
         return error("Invalid record");
       SmallVector<Type*, 8> ArgTys;
@@ -1617,7 +1620,33 @@
       if (!ResultTy || ArgTys.size() < Record.size()-2)
         return error("Invalid type");
 
-      ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
+      // FIXME: I don't think we can add this in a backwards compatible way
+      // without some digusting hack.
+      unsigned AddrSpace = 0;
+      ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0], AddrSpace);
+      break;
+    }
+    case bitc::TYPE_CODE_FUNCTION: {
+      // FUNCTION: [vararg, addrspace, retty, paramty x N]
+      if (Record.size() < 3)
+        return error("Invalid record");
+      SmallVector<Type*, 8> ArgTys;
+      for (unsigned i = 3, e = Record.size(); i != e; ++i) {
+        if (Type *T = getTypeByID(Record[i])) {
+          if (!FunctionType::isValidArgumentType(T))
+            return error("Invalid function argument type");
+          ArgTys.push_back(T);
+        }
+        else
+          break;
+      }
+
+      ResultTy = getTypeByID(Record[2]);
+      if (!ResultTy || ArgTys.size() < Record.size()-3)
+        return error("Invalid type");
+
+      unsigned AddrSpace = Record[1];
+      ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0], AddrSpace);
       break;
     }
     case bitc::TYPE_CODE_STRUCT_ANON: {  // STRUCT: [ispacked, eltty x N]
Index: lib/Bitcode/Writer/BitcodeWriter.cpp
===================================================================
--- lib/Bitcode/Writer/BitcodeWriter.cpp
+++ lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -802,9 +802,10 @@
     }
     case Type::FunctionTyID: {
       FunctionType *FT = cast<FunctionType>(T);
-      // FUNCTION: [isvararg, retty, paramty x N]
+      // FUNCTION: [isvararg, addrspace, retty, paramty x N]
       Code = bitc::TYPE_CODE_FUNCTION;
       TypeVals.push_back(FT->isVarArg());
+      TypeVals.push_back(FT->getAddressSpace());
       TypeVals.push_back(VE.getTypeID(FT->getReturnType()));
       for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i)
         TypeVals.push_back(VE.getTypeID(FT->getParamType(i)));
Index: lib/CodeGen/AtomicExpandPass.cpp
===================================================================
--- lib/CodeGen/AtomicExpandPass.cpp
+++ lib/CodeGen/AtomicExpandPass.cpp
@@ -1592,7 +1592,8 @@
   SmallVector<Type *, 6> ArgTys;
   for (Value *Arg : Args)
     ArgTys.push_back(Arg->getType());
-  FunctionType *FnType = FunctionType::get(ResultTy, ArgTys, false);
+  FunctionType *FnType = FunctionType::get(ResultTy, ArgTys, false,
+                                           DL.getProgramAddressSpace());
   Constant *LibcallFn =
       M->getOrInsertFunction(TLI->getLibcallName(RTLibType), FnType, Attr);
   CallInst *Call = Builder.CreateCall(LibcallFn, Args);
Index: lib/CodeGen/IntrinsicLowering.cpp
===================================================================
--- lib/CodeGen/IntrinsicLowering.cpp
+++ lib/CodeGen/IntrinsicLowering.cpp
@@ -28,11 +28,13 @@
 static void EnsureFunctionExists(Module &M, const char *Name,
                                  ArgIt ArgBegin, ArgIt ArgEnd,
                                  Type *RetTy) {
+  const auto &DL = M.getDataLayout();
   // Insert a correctly-typed definition now.
   std::vector<Type *> ParamTys;
   for (ArgIt I = ArgBegin; I != ArgEnd; ++I)
     ParamTys.push_back(I->getType());
-  M.getOrInsertFunction(Name, FunctionType::get(RetTy, ParamTys, false));
+  M.getOrInsertFunction(Name, FunctionType::get(RetTy, ParamTys, false,
+                                                DL.getProgramAddressSpace()));
 }
 
 static void EnsureFPIntrinsicsExist(Module &M, Function &Fn,
@@ -68,12 +70,14 @@
   // If we haven't already looked up this function, check to see if the
   // program already contains a function with this name.
   Module *M = CI->getModule();
+  const auto &DL = M->getDataLayout();
   // Get or insert the definition now.
   std::vector<Type *> ParamTys;
   for (ArgIt I = ArgBegin; I != ArgEnd; ++I)
     ParamTys.push_back((*I)->getType());
   Constant* FCache = M->getOrInsertFunction(NewFn,
-                                  FunctionType::get(RetTy, ParamTys, false));
+                              FunctionType::get(RetTy, ParamTys, false,
+                                                DL.getProgramAddressSpace()));
 
   IRBuilder<> Builder(CI->getParent(), CI->getIterator());
   SmallVector<Value *, 8> Args(ArgBegin, ArgEnd);
Index: lib/CodeGen/MIRParser/MIRParser.cpp
===================================================================
--- lib/CodeGen/MIRParser/MIRParser.cpp
+++ lib/CodeGen/MIRParser/MIRParser.cpp
@@ -268,7 +268,8 @@
 static Function *createDummyFunction(StringRef Name, Module &M) {
   auto &Context = M.getContext();
   Function *F = cast<Function>(M.getOrInsertFunction(
-      Name, FunctionType::get(Type::getVoidTy(Context), false)));
+      Name, FunctionType::get(Type::getVoidTy(Context), false,
+                              M.getDataLayout().getProgramAddressSpace())));
   BasicBlock *BB = BasicBlock::Create(Context, "entry", F);
   new UnreachableInst(Context, BB);
   return F;
Index: lib/IR/AsmWriter.cpp
===================================================================
--- lib/IR/AsmWriter.cpp
+++ lib/IR/AsmWriter.cpp
@@ -2747,6 +2747,9 @@
   StringRef UA = getUnnamedAddrEncoding(F->getUnnamedAddr());
   if (!UA.empty())
     Out << ' ' << UA;
+  unsigned AddrSpace = FT->getAddressSpace();
+  if (AddrSpace != 0)
+    Out << " addrspace(" << AddrSpace << ")";
   if (Attrs.hasAttributes(AttributeList::FunctionIndex))
     Out << " #" << Machine.getAttributeGroupSlot(Attrs.getFnAttributes());
   if (F->hasSection()) {
Index: lib/IR/AutoUpgrade.cpp
===================================================================
--- lib/IR/AutoUpgrade.cpp
+++ lib/IR/AutoUpgrade.cpp
@@ -363,7 +363,8 @@
       // Can't use Intrinsic::getDeclaration here as it adds a ".i1" to
       // the end of the name. Change name from llvm.arm.neon.vclz.* to
       //  llvm.ctlz.*
-      FunctionType* fType = FunctionType::get(F->getReturnType(), args, false);
+      FunctionType* fType = FunctionType::get(F->getReturnType(), args, false,
+                                              F->getAddressSpace());
       NewFn = Function::Create(fType, F->getLinkage(),
                                "llvm.ctlz." + Name.substr(14), F->getParent());
       return true;
@@ -379,7 +380,7 @@
       SmallVector<Type *, 4> Tys(fArgs.begin(), fArgs.end());
       // Can't use Intrinsic::getDeclaration here as the return types might
       // then only be structurally equal.
-      FunctionType* fType = FunctionType::get(F->getReturnType(), Tys, false);
+      FunctionType* fType = FunctionType::get(F->getReturnType(), Tys, false, F->getAddressSpace());
       NewFn = Function::Create(fType, F->getLinkage(),
                                "llvm." + Name + ".p0i8", F->getParent());
       return true;
Index: lib/IR/Core.cpp
===================================================================
--- lib/IR/Core.cpp
+++ lib/IR/Core.cpp
@@ -483,7 +483,8 @@
                              LLVMTypeRef *ParamTypes, unsigned ParamCount,
                              LLVMBool IsVarArg) {
   ArrayRef<Type*> Tys(unwrap(ParamTypes), ParamCount);
-  return wrap(FunctionType::get(unwrap(ReturnType), Tys, IsVarArg != 0));
+  unsigned AddrSpace = 0; // FIXME
+  return wrap(FunctionType::get(unwrap(ReturnType), Tys, IsVarArg != 0, AddrSpace));
 }
 
 LLVMBool LLVMIsFunctionVarArg(LLVMTypeRef FunctionTy) {
Index: lib/IR/DataLayout.cpp
===================================================================
--- lib/IR/DataLayout.cpp
+++ lib/IR/DataLayout.cpp
@@ -181,6 +181,7 @@
   BigEndian = false;
   AllocaAddrSpace = 0;
   StackNaturalAlign = 0;
+  ProgramAddrSpace = 0;
   ManglingMode = MM_None;
   NonIntegralAddressSpaces.clear();
 
@@ -221,6 +222,14 @@
   return Bits / 8;
 }
 
+/// Gets an unsigned address space integer, including error checks.
+static unsigned int getAddrSpace(StringRef R) {
+  unsigned AddrSpace = getInt(R);
+  if (!isUInt<24>(AddrSpace))
+    report_fatal_error("Invalid address space, must be a 24-bit integer");
+  return AddrSpace;
+}
+
 void DataLayout::parseSpecifier(StringRef Desc) {
   StringRepresentation = Desc;
   while (!Desc.empty()) {
@@ -358,10 +367,12 @@
       StackNaturalAlign = inBytes(getInt(Tok));
       break;
     }
+    case 'P': { // Function address space.
+      ProgramAddrSpace = getAddrSpace(Tok);
+      break;
+    }
     case 'A': { // Default stack/alloca address space.
-      AllocaAddrSpace = getInt(Tok);
-      if (!isUInt<24>(AllocaAddrSpace))
-        report_fatal_error("Invalid address space, must be a 24bit integer");
+      AllocaAddrSpace = getAddrSpace(Tok);
       break;
     }
     case 'm':
Index: lib/IR/Function.cpp
===================================================================
--- lib/IR/Function.cpp
+++ lib/IR/Function.cpp
@@ -940,13 +940,15 @@
   while (!TableRef.empty())
     ArgTys.push_back(DecodeFixedType(TableRef, Tys, Context));
 
+  unsigned AddrSpace = 0; // FIXME: we should grab the progmem space from DL
+
   // DecodeFixedType returns Void for IITDescriptor::Void and IITDescriptor::VarArg
   // If we see void type as the type of the last argument, it is vararg intrinsic
   if (!ArgTys.empty() && ArgTys.back()->isVoidTy()) {
     ArgTys.pop_back();
-    return FunctionType::get(ResultTy, ArgTys, true);
+    return FunctionType::get(ResultTy, ArgTys, true, AddrSpace);
   }
-  return FunctionType::get(ResultTy, ArgTys, false);
+  return FunctionType::get(ResultTy, ArgTys, false, AddrSpace);
 }
 
 bool Intrinsic::isOverloaded(ID id) {
Index: lib/IR/Globals.cpp
===================================================================
--- lib/IR/Globals.cpp
+++ lib/IR/Globals.cpp
@@ -107,6 +107,11 @@
   return cast<GlobalObject>(this)->getAlignment();
 }
 
+unsigned GlobalValue::getAddressSpace() const {
+  PointerType *PtrTy = getType();
+  return PtrTy->getAddressSpace();
+}
+
 void GlobalObject::setAlignment(unsigned Align) {
   assert((Align & (Align-1)) == 0 && "Alignment is not a power of 2!");
   assert(Align <= MaximumAlignment &&
Index: lib/IR/Type.cpp
===================================================================
--- lib/IR/Type.cpp
+++ lib/IR/Type.cpp
@@ -275,11 +275,13 @@
 //===----------------------------------------------------------------------===//
 
 FunctionType::FunctionType(Type *Result, ArrayRef<Type*> Params,
-                           bool IsVarArgs)
+                           bool IsVarArgs, unsigned AddrSpace)
   : Type(Result->getContext(), FunctionTyID) {
   Type **SubTys = reinterpret_cast<Type**>(this+1);
   assert(isValidReturnType(Result) && "invalid return type for function");
-  setSubclassData(IsVarArgs);
+
+  unsigned SubclassData = (IsVarArgs & 1) | (AddrSpace << 1);
+  setSubclassData(SubclassData);
 
   SubTys[0] = Result;
 
@@ -295,7 +297,7 @@
 
 // This is the factory function for the FunctionType class.
 FunctionType *FunctionType::get(Type *ReturnType,
-                                ArrayRef<Type*> Params, bool isVarArg) {
+                                ArrayRef<Type*> Params, bool isVarArg, unsigned AddrSpace) {
   LLVMContextImpl *pImpl = ReturnType->getContext().pImpl;
   FunctionTypeKeyInfo::KeyTy Key(ReturnType, Params, isVarArg);
   auto I = pImpl->FunctionTypes.find_as(Key);
@@ -305,7 +307,7 @@
     FT = (FunctionType *)pImpl->TypeAllocator.Allocate(
         sizeof(FunctionType) + sizeof(Type *) * (Params.size() + 1),
         alignof(FunctionType));
-    new (FT) FunctionType(ReturnType, Params, isVarArg);
+    new (FT) FunctionType(ReturnType, Params, isVarArg, AddrSpace);
     pImpl->FunctionTypes.insert(FT);
   } else {
     FT = *I;
@@ -314,8 +316,8 @@
   return FT;
 }
 
-FunctionType *FunctionType::get(Type *Result, bool isVarArg) {
-  return get(Result, None, isVarArg);
+FunctionType *FunctionType::get(Type *Result, bool isVarArg, unsigned AddrSpace) {
+  return get(Result, None, isVarArg, AddrSpace);
 }
 
 bool FunctionType::isValidReturnType(Type *RetTy) {
Index: lib/IR/Verifier.cpp
===================================================================
--- lib/IR/Verifier.cpp
+++ lib/IR/Verifier.cpp
@@ -611,7 +611,9 @@
     if (ArrayType *ATy = dyn_cast<ArrayType>(GV.getValueType())) {
       StructType *STy = dyn_cast<StructType>(ATy->getElementType());
       PointerType *FuncPtrTy =
-          FunctionType::get(Type::getVoidTy(Context), false)->getPointerTo();
+          FunctionType::get(Type::getVoidTy(Context), false,
+          // FIXME: we might want to grab the AddrSpace from the DL
+                            /*AddrSpace=*/ 0)->getPointerTo();
       // FIXME: Reject the 2-field form in LLVM 4.0.
       Assert(STy &&
                  (STy->getNumElements() == 2 || STy->getNumElements() == 3) &&
Index: lib/Linker/IRMover.cpp
===================================================================
--- lib/Linker/IRMover.cpp
+++ lib/Linker/IRMover.cpp
@@ -296,10 +296,13 @@
   case Type::PointerTyID:
     return *Entry = PointerType::get(ElementTypes[0],
                                      cast<PointerType>(Ty)->getAddressSpace());
-  case Type::FunctionTyID:
+  case Type::FunctionTyID: {
+    auto *FTy = cast<FunctionType>(Ty);
     return *Entry = FunctionType::get(ElementTypes[0],
                                       makeArrayRef(ElementTypes).slice(1),
-                                      cast<FunctionType>(Ty)->isVarArg());
+                                      FTy->isVarArg(),
+                                      FTy->getAddressSpace());
+  }
   case Type::StructTyID: {
     auto *STy = cast<StructType>(Ty);
     bool IsPacked = STy->isPacked();
Index: lib/Target/AMDGPU/AMDGPULibFunc.cpp
===================================================================
--- lib/Target/AMDGPU/AMDGPULibFunc.cpp
+++ lib/Target/AMDGPU/AMDGPULibFunc.cpp
@@ -857,7 +857,7 @@
 
   return FunctionType::get(
     getIntrinsicParamType(C, getRetType(FuncId, Leads), true),
-    Args, false);
+    Args, false, M.getDataLayout().getProgramAddressSpace());
 }
 
 unsigned AMDGPULibFunc::getNumArgs() const {
Index: lib/Target/AMDGPU/AMDGPUOpenCLImageTypeLoweringPass.cpp
===================================================================
--- lib/Target/AMDGPU/AMDGPUOpenCLImageTypeLoweringPass.cpp
+++ lib/Target/AMDGPU/AMDGPUOpenCLImageTypeLoweringPass.cpp
@@ -303,7 +303,8 @@
     }
 
     // Create function with new signature and clone the old body into it.
-    auto NewFT = FunctionType::get(FT->getReturnType(), ArgTypes, false);
+    auto NewFT = FunctionType::get(FT->getReturnType(), ArgTypes, false,
+                                   FT->getAddressSpace());
     auto NewF = Function::Create(NewFT, F->getLinkage(), F->getName());
     ValueToValueMapTy VMap;
     auto NewFArgIt = NewF->arg_begin();
Index: lib/Target/AMDGPU/AMDGPURewriteOutArguments.cpp
===================================================================
--- lib/Target/AMDGPU/AMDGPURewriteOutArguments.cpp
+++ lib/Target/AMDGPU/AMDGPURewriteOutArguments.cpp
@@ -356,7 +356,8 @@
 
   FunctionType *NewFuncTy = FunctionType::get(NewRetTy,
                                               F.getFunctionType()->params(),
-                                              F.isVarArg());
+                                              F.isVarArg(),
+                                              F.getAddressSpace());
 
   DEBUG(dbgs() << "Computed new return type: " << *NewRetTy << '\n');
 
Index: lib/Target/AVR/AVRTargetMachine.cpp
===================================================================
--- lib/Target/AVR/AVRTargetMachine.cpp
+++ lib/Target/AVR/AVRTargetMachine.cpp
@@ -25,7 +25,7 @@
 
 namespace llvm {
 
-static const char *AVRDataLayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-n8";
+static const char *AVRDataLayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-n8-P1";
 
 /// Processes a CPU name.
 static StringRef getCPU(StringRef CPU) {
Index: lib/Target/Mips/Mips16HardFloat.cpp
===================================================================
--- lib/Target/Mips/Mips16HardFloat.cpp
+++ lib/Target/Mips/Mips16HardFloat.cpp
@@ -49,7 +49,8 @@
   std::vector<Value *> AsmArgs;
 
   FunctionType *AsmFTy =
-      FunctionType::get(Type::getVoidTy(C), AsmArgTypes, false);
+      FunctionType::get(Type::getVoidTy(C), AsmArgTypes, false,
+                     BB->getModule()->getDataLayout().getProgramAddressSpace());
   InlineAsm *IA = InlineAsm::get(AsmFTy, AsmText, "", true,
                                  /* IsAlignStack */ false, InlineAsm::AD_ATT);
   CallInst::Create(IA, AsmArgs, "", BB);
Index: lib/Target/X86/X86WinEHState.cpp
===================================================================
--- lib/Target/X86/X86WinEHState.cpp
+++ lib/Target/X86/X86WinEHState.cpp
@@ -177,7 +177,8 @@
       "_setjmp3", FunctionType::get(
                       Type::getInt32Ty(TheModule->getContext()),
                       {Int8PtrType, Type::getInt32Ty(TheModule->getContext())},
-                      /*isVarArg=*/true));
+                      /*isVarArg=*/true,
+                      TheModule->getDataLayout().getProgramAddressSpace()));
 
   // Disable frame pointer elimination in this function.
   // FIXME: Do the nested handlers need to keep the parent ebp in ebp, or can we
@@ -301,7 +302,8 @@
 
     CxxLongjmpUnwind = TheModule->getOrInsertFunction(
         "__CxxLongjmpUnwind",
-        FunctionType::get(VoidTy, Int8PtrType, /*isVarArg=*/false));
+        FunctionType::get(VoidTy, Int8PtrType, /*isVarArg=*/false,
+                          TheModule->getDataLayout().getProgramAddressSpace()));
     cast<Function>(CxxLongjmpUnwind->stripPointerCasts())
         ->setCallingConv(CallingConv::X86_StdCall);
   } else if (Personality == EHPersonality::MSVC_X86SEH) {
@@ -386,16 +388,17 @@
 ///   jmpl ___CxxFrameHandler3
 Function *WinEHStatePass::generateLSDAInEAXThunk(Function *ParentFunc) {
   LLVMContext &Context = ParentFunc->getContext();
+  const auto &DL = ParentFunc->getParent()->getDataLayout();
   Type *Int32Ty = Type::getInt32Ty(Context);
   Type *Int8PtrType = Type::getInt8PtrTy(Context);
   Type *ArgTys[5] = {Int8PtrType, Int8PtrType, Int8PtrType, Int8PtrType,
                      Int8PtrType};
   FunctionType *TrampolineTy =
       FunctionType::get(Int32Ty, makeArrayRef(&ArgTys[0], 4),
-                        /*isVarArg=*/false);
+                        /*isVarArg=*/false, DL.getProgramAddressSpace());
   FunctionType *TargetFuncTy =
       FunctionType::get(Int32Ty, makeArrayRef(&ArgTys[0], 5),
-                        /*isVarArg=*/false);
+                        /*isVarArg=*/false, DL.getProgramAddressSpace());
   Function *Trampoline =
       Function::Create(TrampolineTy, GlobalValue::InternalLinkage,
                        Twine("__ehhandler$") + GlobalValue::dropLLVMManglingEscape(
Index: lib/Transforms/IPO/ArgumentPromotion.cpp
===================================================================
--- lib/Transforms/IPO/ArgumentPromotion.cpp
+++ lib/Transforms/IPO/ArgumentPromotion.cpp
@@ -183,7 +183,8 @@
   Type *RetTy = FTy->getReturnType();
 
   // Construct the new function type using the new arguments.
-  FunctionType *NFTy = FunctionType::get(RetTy, Params, FTy->isVarArg());
+  FunctionType *NFTy = FunctionType::get(RetTy, Params, FTy->isVarArg(),
+                                         FTy->getAddressSpace());
 
   // Create the new function body and insert it into the module.
   Function *NF = Function::Create(NFTy, F->getLinkage(), F->getName());
Index: lib/Transforms/IPO/DeadArgumentElimination.cpp
===================================================================
--- lib/Transforms/IPO/DeadArgumentElimination.cpp
+++ lib/Transforms/IPO/DeadArgumentElimination.cpp
@@ -142,7 +142,8 @@
 
   std::vector<Type*> Params(FTy->param_begin(), FTy->param_end());
   FunctionType *NFTy = FunctionType::get(FTy->getReturnType(),
-                                                Params, false);
+                                         Params, false,
+                                         FTy->getAddressSpace());
   unsigned NumArgs = Params.size();
 
   // Create the new function body and insert it into the module...
@@ -790,7 +791,8 @@
       F->getContext(), PAL.getFnAttributes(), RetAttrs, ArgAttrVec);
 
   // Create the new function type based on the recomputed parameters.
-  FunctionType *NFTy = FunctionType::get(NRetTy, Params, FTy->isVarArg());
+  FunctionType *NFTy = FunctionType::get(NRetTy, Params, FTy->isVarArg(),
+                                         FTy->getAddressSpace());
 
   // No change?
   if (NFTy == FTy)
Index: lib/Transforms/IPO/LowerTypeTests.cpp
===================================================================
--- lib/Transforms/IPO/LowerTypeTests.cpp
+++ lib/Transforms/IPO/LowerTypeTests.cpp
@@ -247,6 +247,7 @@
 
 class LowerTypeTestsModule {
   Module &M;
+  const DataLayout &DL;
 
   ModuleSummaryIndex *ExportSummary;
   const ModuleSummaryIndex *ImportSummary;
@@ -1023,7 +1024,7 @@
   if (WeakInitializerFn == nullptr) {
     WeakInitializerFn = Function::Create(
         FunctionType::get(Type::getVoidTy(M.getContext()),
-                          /* IsVarArg */ false),
+                          /* IsVarArg */ false, DL.getProgramAddressSpace()),
         GlobalValue::InternalLinkage, "__cfi_global_var_init", &M);
     BasicBlock *BB =
         BasicBlock::Create(M.getContext(), "entry", WeakInitializerFn);
@@ -1116,7 +1117,8 @@
   for (const auto &Arg : AsmArgs)
     ArgTypes.push_back(Arg->getType());
   InlineAsm *JumpTableAsm =
-      InlineAsm::get(FunctionType::get(IRB.getVoidTy(), ArgTypes, false),
+      InlineAsm::get(FunctionType::get(IRB.getVoidTy(), ArgTypes, false,
+                                       DL.getProgramAddressSpace()),
                      AsmOS.str(), ConstraintOS.str(),
                      /*hasSideEffects=*/true);
 
@@ -1214,7 +1216,8 @@
 
   Function *JumpTableFn =
       Function::Create(FunctionType::get(Type::getVoidTy(M.getContext()),
-                                         /* IsVarArg */ false),
+                                         /* IsVarArg */ false,
+                                         DL.getProgramAddressSpace()),
                        GlobalValue::PrivateLinkage, ".cfi.jumptable", &M);
   ArrayType *JumpTableType =
       ArrayType::get(getJumpTableEntryType(), Functions.size());
@@ -1377,7 +1380,8 @@
 LowerTypeTestsModule::LowerTypeTestsModule(
     Module &M, ModuleSummaryIndex *ExportSummary,
     const ModuleSummaryIndex *ImportSummary)
-    : M(M), ExportSummary(ExportSummary), ImportSummary(ImportSummary) {
+    : M(M), DL(M.getDataLayout()), ExportSummary(ExportSummary),
+      ImportSummary(ImportSummary) {
   assert(!(ExportSummary && ImportSummary));
   Triple TargetTriple(M.getTargetTriple());
   Arch = TargetTriple.getArch();
@@ -1513,7 +1517,8 @@
         Function *F = M.getFunction(FunctionName);
         if (!F)
           F = Function::Create(
-              FunctionType::get(Type::getVoidTy(M.getContext()), false),
+              FunctionType::get(Type::getVoidTy(M.getContext()), false,
+                                DL.getProgramAddressSpace()),
               GlobalVariable::ExternalLinkage, FunctionName, &M);
 
         // If the function is available_externally, remove its definition so
Index: lib/Transforms/IPO/ThinLTOBitcodeWriter.cpp
===================================================================
--- lib/Transforms/IPO/ThinLTOBitcodeWriter.cpp
+++ lib/Transforms/IPO/ThinLTOBitcodeWriter.cpp
@@ -132,7 +132,8 @@
 // FIXME: If we made functions typeless then there would be no need to do this.
 void simplifyExternals(Module &M) {
   FunctionType *EmptyFT =
-      FunctionType::get(Type::getVoidTy(M.getContext()), false);
+      FunctionType::get(Type::getVoidTy(M.getContext()), false,
+                        M.getDataLayout().getProgramAddressSpace());
 
   for (auto I = M.begin(), E = M.end(); I != E;) {
     Function &F = *I++;
Index: lib/Transforms/InstCombine/InstCombineCalls.cpp
===================================================================
--- lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -4419,7 +4419,8 @@
       // Replace the trampoline call with a direct call.  Let the generic
       // code sort out any function type mismatches.
       FunctionType *NewFTy = FunctionType::get(FTy->getReturnType(), NewTypes,
-                                                FTy->isVarArg());
+                                                FTy->isVarArg(),
+                                                FTy->getAddressSpace());
       Constant *NewCallee =
         NestF->getType() == PointerType::getUnqual(NewFTy) ?
         NestF : ConstantExpr::getBitCast(NestF,
Index: lib/Transforms/Instrumentation/AddressSanitizer.cpp
===================================================================
--- lib/Transforms/Instrumentation/AddressSanitizer.cpp
+++ lib/Transforms/Instrumentation/AddressSanitizer.cpp
@@ -1709,8 +1709,10 @@
 }
 
 IRBuilder<> AddressSanitizerModule::CreateAsanModuleDtor(Module &M) {
+  unsigned AddrSpace = M.getDataLayout().getProgramAddressSpace();
+
   AsanDtorFunction =
-      Function::Create(FunctionType::get(Type::getVoidTy(*C), false),
+      Function::Create(FunctionType::get(Type::getVoidTy(*C), false, AddrSpace),
                        GlobalValue::InternalLinkage, kAsanModuleDtorName, &M);
   BasicBlock *AsanDtorBB = BasicBlock::Create(*C, "", AsanDtorFunction);
 
@@ -2118,6 +2120,9 @@
 
 void AddressSanitizer::initializeCallbacks(Module &M) {
   IRBuilder<> IRB(*C);
+
+  unsigned AddrSpace = M.getDataLayout().getProgramAddressSpace();
+
   // Create __asan_report* callbacks.
   // IsWrite, TypeSize and Exp are encoded in the function name.
   for (int Exp = 0; Exp < 2; Exp++) {
@@ -2138,12 +2143,12 @@
 	        checkSanitizerInterfaceFunction(M.getOrInsertFunction(
 	            kAsanReportErrorTemplate + ExpStr + TypeStr + SuffixStr +
 	                EndingStr,
-	            FunctionType::get(IRB.getVoidTy(), Args2, false)));
+	            FunctionType::get(IRB.getVoidTy(), Args2, false, AddrSpace)));
 
 	    AsanMemoryAccessCallbackSized[AccessIsWrite][Exp] =
 	        checkSanitizerInterfaceFunction(M.getOrInsertFunction(
 	            ClMemoryAccessCallbackPrefix + ExpStr + TypeStr + "N" + EndingStr,
-	            FunctionType::get(IRB.getVoidTy(), Args2, false)));
+	            FunctionType::get(IRB.getVoidTy(), Args2, false, AddrSpace)));
 
 	    for (size_t AccessSizeIndex = 0; AccessSizeIndex < kNumberOfAccessSizes;
 	         AccessSizeIndex++) {
@@ -2151,12 +2156,12 @@
 	      AsanErrorCallback[AccessIsWrite][Exp][AccessSizeIndex] =
 	          checkSanitizerInterfaceFunction(M.getOrInsertFunction(
 	              kAsanReportErrorTemplate + ExpStr + Suffix + EndingStr,
-	              FunctionType::get(IRB.getVoidTy(), Args1, false)));
+	              FunctionType::get(IRB.getVoidTy(), Args1, false, AddrSpace)));
 
 	      AsanMemoryAccessCallback[AccessIsWrite][Exp][AccessSizeIndex] =
 	          checkSanitizerInterfaceFunction(M.getOrInsertFunction(
 	              ClMemoryAccessCallbackPrefix + ExpStr + Suffix + EndingStr,
-	              FunctionType::get(IRB.getVoidTy(), Args1, false)));
+	              FunctionType::get(IRB.getVoidTy(), Args1, false, AddrSpace)));
 	    }
 	  }
   }
@@ -2181,7 +2186,7 @@
   AsanPtrSubFunction = checkSanitizerInterfaceFunction(M.getOrInsertFunction(
       kAsanPtrSub, IRB.getVoidTy(), IntptrTy, IntptrTy));
   // We insert an empty inline asm after __asan_report* to avoid callback merge.
-  EmptyAsm = InlineAsm::get(FunctionType::get(IRB.getVoidTy(), false),
+  EmptyAsm = InlineAsm::get(FunctionType::get(IRB.getVoidTy(), false, AddrSpace),
                             StringRef(""), StringRef(""),
                             /*hasSideEffects=*/true);
 }
Index: lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
===================================================================
--- lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
+++ lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
@@ -389,7 +389,8 @@
   Type *RetType = T->getReturnType();
   if (!RetType->isVoidTy())
     RetType = StructType::get(RetType, ShadowTy);
-  return FunctionType::get(RetType, ArgTypes, T->isVarArg());
+  return FunctionType::get(RetType, ArgTypes, T->isVarArg(),
+                           T->getAddressSpace());
 }
 
 FunctionType *DataFlowSanitizer::getTrampolineFunctionType(FunctionType *T) {
@@ -401,7 +402,8 @@
   Type *RetType = T->getReturnType();
   if (!RetType->isVoidTy())
     ArgTypes.push_back(ShadowPtrTy);
-  return FunctionType::get(T->getReturnType(), ArgTypes, false);
+  return FunctionType::get(T->getReturnType(), ArgTypes, false,
+                           T->getAddressSpace());
 }
 
 FunctionType *DataFlowSanitizer::getCustomFunctionType(FunctionType *T) {
@@ -424,7 +426,8 @@
   Type *RetType = T->getReturnType();
   if (!RetType->isVoidTy())
     ArgTypes.push_back(ShadowPtrTy);
-  return FunctionType::get(T->getReturnType(), ArgTypes, T->isVarArg());
+  return FunctionType::get(T->getReturnType(), ArgTypes, T->isVarArg(),
+                           T->getAddressSpace());
 }
 
 bool DataFlowSanitizer::doInitialization(Module &M) {
@@ -456,19 +459,25 @@
 
   Type *DFSanUnionArgs[2] = { ShadowTy, ShadowTy };
   DFSanUnionFnTy =
-      FunctionType::get(ShadowTy, DFSanUnionArgs, /*isVarArg=*/ false);
+      FunctionType::get(ShadowTy, DFSanUnionArgs, /*isVarArg=*/ false,
+                        DL.getProgramAddressSpace());
   Type *DFSanUnionLoadArgs[2] = { ShadowPtrTy, IntptrTy };
   DFSanUnionLoadFnTy =
-      FunctionType::get(ShadowTy, DFSanUnionLoadArgs, /*isVarArg=*/ false);
+      FunctionType::get(ShadowTy, DFSanUnionLoadArgs, /*isVarArg=*/ false,
+                        DL.getProgramAddressSpace());
   DFSanUnimplementedFnTy = FunctionType::get(
-      Type::getVoidTy(*Ctx), Type::getInt8PtrTy(*Ctx), /*isVarArg=*/false);
+      Type::getVoidTy(*Ctx), Type::getInt8PtrTy(*Ctx), /*isVarArg=*/false,
+      DL.getProgramAddressSpace());
   Type *DFSanSetLabelArgs[3] = { ShadowTy, Type::getInt8PtrTy(*Ctx), IntptrTy };
   DFSanSetLabelFnTy = FunctionType::get(Type::getVoidTy(*Ctx),
-                                        DFSanSetLabelArgs, /*isVarArg=*/false);
+                                        DFSanSetLabelArgs, /*isVarArg=*/false,
+                                        DL.getProgramAddressSpace());
   DFSanNonzeroLabelFnTy = FunctionType::get(
-      Type::getVoidTy(*Ctx), None, /*isVarArg=*/false);
+      Type::getVoidTy(*Ctx), None, /*isVarArg=*/false,
+      DL.getProgramAddressSpace());
   DFSanVarargWrapperFnTy = FunctionType::get(
-      Type::getVoidTy(*Ctx), Type::getInt8PtrTy(*Ctx), /*isVarArg=*/false);
+      Type::getVoidTy(*Ctx), Type::getInt8PtrTy(*Ctx), /*isVarArg=*/false,
+      DL.getProgramAddressSpace());
 
   if (GetArgTLSPtr) {
     Type *ArgTLSTy = ArrayType::get(ShadowTy, 64);
@@ -476,14 +485,16 @@
     GetArgTLS = ConstantExpr::getIntToPtr(
         ConstantInt::get(IntptrTy, uintptr_t(GetArgTLSPtr)),
         PointerType::getUnqual(
-            FunctionType::get(PointerType::getUnqual(ArgTLSTy), false)));
+            FunctionType::get(PointerType::getUnqual(ArgTLSTy), false,
+                              DL.getProgramAddressSpace())));
   }
   if (GetRetvalTLSPtr) {
     RetvalTLS = nullptr;
     GetRetvalTLS = ConstantExpr::getIntToPtr(
         ConstantInt::get(IntptrTy, uintptr_t(GetRetvalTLSPtr)),
         PointerType::getUnqual(
-            FunctionType::get(PointerType::getUnqual(ShadowTy), false)));
+            FunctionType::get(PointerType::getUnqual(ShadowTy), false,
+                              DL.getProgramAddressSpace())));
   }
 
   ColdCallWeights = MDBuilder(*Ctx).createBranchWeights(1, 1000);
Index: lib/Transforms/Instrumentation/EfficiencySanitizer.cpp
===================================================================
--- lib/Transforms/Instrumentation/EfficiencySanitizer.cpp
+++ lib/Transforms/Instrumentation/EfficiencySanitizer.cpp
@@ -519,10 +519,12 @@
 }
 
 void EfficiencySanitizer::createDestructor(Module &M, Constant *ToolInfoArg) {
+  const auto &DL = M.getDataLayout();
+
   PointerType *Int8PtrTy = Type::getInt8PtrTy(*Ctx);
-  EsanDtorFunction = Function::Create(FunctionType::get(Type::getVoidTy(*Ctx),
-                                                        false),
-                                      GlobalValue::InternalLinkage,
+  auto *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false,
+                                DL.getProgramAddressSpace());
+  EsanDtorFunction = Function::Create(FTy, GlobalValue::InternalLinkage,
                                       EsanModuleDtorName, &M);
   ReturnInst::Create(*Ctx, BasicBlock::Create(*Ctx, "", EsanDtorFunction));
   IRBuilder<> IRB_Dtor(EsanDtorFunction->getEntryBlock().getTerminator());
Index: lib/Transforms/Instrumentation/GCOVProfiling.cpp
===================================================================
--- lib/Transforms/Instrumentation/GCOVProfiling.cpp
+++ lib/Transforms/Instrumentation/GCOVProfiling.cpp
@@ -129,6 +129,7 @@
   SmallVector<uint32_t, 4> FileChecksums;
 
   Module *M;
+  const DataLayout *DL;
   LLVMContext *Ctx;
   SmallVector<std::unique_ptr<GCOVFunction>, 16> Funcs;
 };
@@ -462,7 +463,8 @@
 
 bool GCOVProfiler::runOnModule(Module &M) {
   this->M = &M;
-  Ctx = &M.getContext();
+  this->Ctx = &M.getContext();
+  this->DL = &M.getDataLayout();
 
   if (Options.EmitNotes) emitProfileNotes();
   if (Options.EmitData) return emitProfileArcs();
@@ -689,7 +691,8 @@
     // Create a small bit of code that registers the "__llvm_gcov_writeout" to
     // be executed at exit and the "__llvm_gcov_flush" function to be executed
     // when "__gcov_flush" is called.
-    FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+    FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false,
+                                          DL->getProgramAddressSpace());
     Function *F = Function::Create(FTy, GlobalValue::InternalLinkage,
                                    "__llvm_gcov_init", M);
     F->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
@@ -701,12 +704,14 @@
     BasicBlock *BB = BasicBlock::Create(*Ctx, "entry", F);
     IRBuilder<> Builder(BB);
 
-    FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+    FTy = FunctionType::get(Type::getVoidTy(*Ctx), false,
+                            DL->getProgramAddressSpace());
     Type *Params[] = {
       PointerType::get(FTy, 0),
       PointerType::get(FTy, 0)
     };
-    FTy = FunctionType::get(Builder.getVoidTy(), Params, false);
+    FTy = FunctionType::get(Builder.getVoidTy(), Params, false,
+                            DL->getProgramAddressSpace());
 
     // Initialize the environment and register the local writeout and flush
     // functions.
@@ -777,7 +782,8 @@
     Type::getInt8PtrTy(*Ctx),  // const char version[4]
     Type::getInt32Ty(*Ctx),    // uint32_t checksum
   };
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false,
+                                        DL->getProgramAddressSpace());
   return M->getOrInsertFunction("llvm_gcda_start_file", FTy);
 }
 
@@ -788,7 +794,8 @@
     Int32Ty->getPointerTo(),                // uint32_t *predecessor
     Int64Ty->getPointerTo()->getPointerTo() // uint64_t **counters
   };
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false,
+                                        DL->getProgramAddressSpace());
   return M->getOrInsertFunction("__llvm_gcov_indirect_counter_increment", FTy);
 }
 
@@ -800,7 +807,8 @@
     Type::getInt8Ty(*Ctx),     // uint8_t use_extra_checksum
     Type::getInt32Ty(*Ctx),    // uint32_t cfg_checksum
   };
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false,
+                                        DL->getProgramAddressSpace());
   return M->getOrInsertFunction("llvm_gcda_emit_function", FTy);
 }
 
@@ -809,17 +817,20 @@
     Type::getInt32Ty(*Ctx),     // uint32_t num_counters
     Type::getInt64PtrTy(*Ctx),  // uint64_t *counters
   };
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false,
+                                        DL->getProgramAddressSpace());
   return M->getOrInsertFunction("llvm_gcda_emit_arcs", FTy);
 }
 
 Constant *GCOVProfiler::getSummaryInfoFunc() {
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false,
+                                        DL->getProgramAddressSpace());
   return M->getOrInsertFunction("llvm_gcda_summary_info", FTy);
 }
 
 Constant *GCOVProfiler::getEndFileFunc() {
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false,
+                                        DL->getProgramAddressSpace());
   return M->getOrInsertFunction("llvm_gcda_end_file", FTy);
 }
 
@@ -838,7 +849,8 @@
 
 Function *GCOVProfiler::insertCounterWriteout(
     ArrayRef<std::pair<GlobalVariable *, MDNode *> > CountersBySP) {
-  FunctionType *WriteoutFTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+  FunctionType *WriteoutFTy = FunctionType::get(Type::getVoidTy(*Ctx), false,
+                                                DL->getProgramAddressSpace());
   Function *WriteoutF = M->getFunction("__llvm_gcov_writeout");
   if (!WriteoutF)
     WriteoutF = Function::Create(WriteoutFTy, GlobalValue::InternalLinkage,
@@ -953,7 +965,8 @@
 
 Function *GCOVProfiler::
 insertFlush(ArrayRef<std::pair<GlobalVariable*, MDNode*> > CountersBySP) {
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false,
+                                        DL->getProgramAddressSpace());
   Function *FlushF = M->getFunction("__llvm_gcov_flush");
   if (!FlushF)
     FlushF = Function::Create(FTy, GlobalValue::InternalLinkage,
Index: lib/Transforms/Instrumentation/InstrProfiling.cpp
===================================================================
--- lib/Transforms/Instrumentation/InstrProfiling.cpp
+++ lib/Transforms/Instrumentation/InstrProfiling.cpp
@@ -484,6 +484,7 @@
                                                const TargetLibraryInfo &TLI,
                                                bool IsRange = false) {
   LLVMContext &Ctx = M.getContext();
+  const auto &DL = M.getDataLayout();
   auto *ReturnTy = Type::getVoidTy(M.getContext());
 
   Constant *Res;
@@ -493,7 +494,8 @@
 #include "llvm/ProfileData/InstrProfData.inc"
     };
     auto *ValueProfilingCallTy =
-        FunctionType::get(ReturnTy, makeArrayRef(ParamTypes), false);
+        FunctionType::get(ReturnTy, makeArrayRef(ParamTypes), false,
+                          DL.getProgramAddressSpace());
     Res = M.getOrInsertFunction(getInstrProfValueProfFuncName(),
                                 ValueProfilingCallTy);
   } else {
@@ -504,7 +506,8 @@
 #undef VALUE_RANGE_PROF
     };
     auto *ValueRangeProfilingCallTy =
-        FunctionType::get(ReturnTy, makeArrayRef(RangeParamTypes), false);
+        FunctionType::get(ReturnTy, makeArrayRef(RangeParamTypes), false,
+                          DL.getProgramAddressSpace());
     Res = M.getOrInsertFunction(getInstrProfValueRangeProfFuncName(),
                                 ValueRangeProfilingCallTy);
   }
@@ -852,6 +855,8 @@
 }
 
 void InstrProfiling::emitRegistration() {
+  const auto &DL = M->getDataLayout();
+
   if (!needsRuntimeRegistrationOfSectionRange(*M))
     return;
 
@@ -859,7 +864,8 @@
   auto *VoidTy = Type::getVoidTy(M->getContext());
   auto *VoidPtrTy = Type::getInt8PtrTy(M->getContext());
   auto *Int64Ty = Type::getInt64Ty(M->getContext());
-  auto *RegisterFTy = FunctionType::get(VoidTy, false);
+  auto *RegisterFTy = FunctionType::get(VoidTy, false,
+                                        DL.getProgramAddressSpace());
   auto *RegisterF = Function::Create(RegisterFTy, GlobalValue::InternalLinkage,
                                      getInstrProfRegFuncsName(), M);
   RegisterF->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
@@ -879,7 +885,8 @@
   if (NamesVar) {
     Type *ParamTypes[] = {VoidPtrTy, Int64Ty};
     auto *NamesRegisterTy =
-        FunctionType::get(VoidTy, makeArrayRef(ParamTypes), false);
+        FunctionType::get(VoidTy, makeArrayRef(ParamTypes), false,
+                          DL.getProgramAddressSpace());
     auto *NamesRegisterF =
         Function::Create(NamesRegisterTy, GlobalVariable::ExternalLinkage,
                          getInstrProfNamesRegFuncName(), M);
@@ -891,6 +898,8 @@
 }
 
 void InstrProfiling::emitRuntimeHook() {
+  const auto &DL = M->getDataLayout();
+
   // We expect the linker to be invoked with -u<hook_var> flag for linux,
   // for which case there is no need to emit the user function.
   if (Triple(M->getTargetTriple()).isOSLinux())
@@ -907,7 +916,8 @@
                          nullptr, getInstrProfRuntimeHookVarName());
 
   // Make a function that uses it.
-  auto *User = Function::Create(FunctionType::get(Int32Ty, false),
+  auto *User = Function::Create(FunctionType::get(Int32Ty, false,
+                                                  DL.getProgramAddressSpace()),
                                 GlobalValue::LinkOnceODRLinkage,
                                 getInstrProfRuntimeHookVarUseFuncName(), M);
   User->addFnAttr(Attribute::NoInline);
@@ -931,6 +941,7 @@
 }
 
 void InstrProfiling::emitInitialization() {
+  const auto &DL = M->getDataLayout();
   StringRef InstrProfileOutput = Options.InstrProfileOutput;
 
   if (!InstrProfileOutput.empty()) {
@@ -953,7 +964,8 @@
 
   // Create the initialization function.
   auto *VoidTy = Type::getVoidTy(M->getContext());
-  auto *F = Function::Create(FunctionType::get(VoidTy, false),
+  auto *F = Function::Create(FunctionType::get(VoidTy, false,
+                                               DL.getProgramAddressSpace()),
                              GlobalValue::InternalLinkage,
                              getInstrProfInitFuncName(), M);
   F->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
Index: lib/Transforms/Instrumentation/MemorySanitizer.cpp
===================================================================
--- lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -415,6 +415,8 @@
 
 /// \brief Insert extern declaration of runtime-provided functions and globals.
 void MemorySanitizer::initializeCallbacks(Module &M) {
+  const auto &DL = M.getDataLayout();
+
   // Only do this once.
   if (WarningFn)
     return;
@@ -490,7 +492,8 @@
     "__msan_origin_tls", nullptr, GlobalVariable::InitialExecTLSModel);
 
   // We insert an empty inline asm after __msan_report* to avoid callback merge.
-  EmptyAsm = InlineAsm::get(FunctionType::get(IRB.getVoidTy(), false),
+  EmptyAsm = InlineAsm::get(FunctionType::get(IRB.getVoidTy(), false,
+                                              DL.getProgramAddressSpace()),
                             StringRef(""), StringRef(""),
                             /*hasSideEffects=*/true);
 }
@@ -499,7 +502,7 @@
 ///
 /// inserts a call to __msan_init to the module's constructor list.
 bool MemorySanitizer::doInitialization(Module &M) {
-  auto &DL = M.getDataLayout();
+  const auto &DL = M.getDataLayout();
 
   Triple TargetTriple(M.getTargetTriple());
   switch (TargetTriple.getOS()) {
Index: lib/Transforms/Instrumentation/SanitizerCoverage.cpp
===================================================================
--- lib/Transforms/Instrumentation/SanitizerCoverage.cpp
+++ lib/Transforms/Instrumentation/SanitizerCoverage.cpp
@@ -380,7 +380,8 @@
 
 
   // We insert an empty inline asm after cov callbacks to avoid callback merge.
-  EmptyAsm = InlineAsm::get(FunctionType::get(IRB.getVoidTy(), false),
+  EmptyAsm = InlineAsm::get(FunctionType::get(IRB.getVoidTy(), false,
+                                              DL->getProgramAddressSpace()),
                             StringRef(""), StringRef(""),
                             /*hasSideEffects=*/true);
 
Index: lib/Transforms/ObjCARC/ARCRuntimeEntryPoints.h
===================================================================
--- lib/Transforms/ObjCARC/ARCRuntimeEntryPoints.h
+++ lib/Transforms/ObjCARC/ARCRuntimeEntryPoints.h
@@ -126,11 +126,13 @@
       return Decl;
 
     LLVMContext &C = TheModule->getContext();
+    const auto &DL = TheModule->getDataLayout();
     Type *Params[] = { PointerType::getUnqual(Type::getInt8Ty(C)) };
     AttributeList Attr = AttributeList().addAttribute(
         C, AttributeList::FunctionIndex, Attribute::NoUnwind);
     FunctionType *Fty = FunctionType::get(Type::getVoidTy(C), Params,
-                                          /*isVarArg=*/false);
+                                          /*isVarArg=*/false,
+                                          DL.getProgramAddressSpace());
     return Decl = TheModule->getOrInsertFunction(Name, Fty, Attr);
   }
 
@@ -140,9 +142,11 @@
       return Decl;
 
     LLVMContext &C = TheModule->getContext();
+    const auto &DL = TheModule->getDataLayout();
     Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
     Type *Params[] = { I8X };
-    FunctionType *Fty = FunctionType::get(I8X, Params, /*isVarArg=*/false);
+    FunctionType *Fty = FunctionType::get(I8X, Params, /*isVarArg=*/false,
+                                          DL.getProgramAddressSpace());
     AttributeList Attr = AttributeList();
 
     if (NoUnwind)
@@ -157,6 +161,7 @@
       return Decl;
 
     LLVMContext &C = TheModule->getContext();
+    const auto &DL = TheModule->getDataLayout();
     Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
     Type *I8XX = PointerType::getUnqual(I8X);
     Type *Params[] = { I8XX, I8X };
@@ -166,7 +171,8 @@
     Attr = Attr.addParamAttribute(C, 0, Attribute::NoCapture);
 
     FunctionType *Fty = FunctionType::get(Type::getVoidTy(C), Params,
-                                          /*isVarArg=*/false);
+                                          /*isVarArg=*/false,
+                                          DL.getProgramAddressSpace());
 
     return Decl = TheModule->getOrInsertFunction(Name, Fty, Attr);
   }
Index: lib/Transforms/ObjCARC/ObjCARCContract.cpp
===================================================================
--- lib/Transforms/ObjCARC/ObjCARCContract.cpp
+++ lib/Transforms/ObjCARC/ObjCARCContract.cpp
@@ -408,8 +408,10 @@
   SmallPtrSetImpl<Instruction *> &DependingInsts,
   SmallPtrSetImpl<const BasicBlock *> &Visited,
   bool &TailOkForStoreStrongs) {
-    // Only these library routines return their argument. In particular,
-    // objc_retainBlock does not necessarily return its argument.
+  const auto &DL = F.getParent()->getDataLayout();
+
+  // Only these library routines return their argument. In particular,
+  // objc_retainBlock does not necessarily return its argument.
   ARCInstKind Class = GetBasicARCInstKind(Inst);
     switch (Class) {
     case ARCInstKind::FusedRetainAutorelease:
@@ -454,7 +456,7 @@
         Changed = true;
         InlineAsm *IA = InlineAsm::get(
             FunctionType::get(Type::getVoidTy(Inst->getContext()),
-                              /*isVarArg=*/false),
+                              /*isVarArg=*/false, DL.getProgramAddressSpace()),
             RVInstMarker->getString(),
             /*Constraints=*/"", /*hasSideEffects=*/true);
         CallInst::Create(IA, "", Inst);
Index: lib/Transforms/Scalar/PlaceSafepoints.cpp
===================================================================
--- lib/Transforms/Scalar/PlaceSafepoints.cpp
+++ lib/Transforms/Scalar/PlaceSafepoints.cpp
@@ -626,6 +626,8 @@
   Module *M = InsertBefore->getModule();
   assert(M && "must be part of a module");
 
+  const auto &DL = M->getDataLayout();
+
   // Inline the safepoint poll implementation - this will get all the branch,
   // control flow, etc..  Most importantly, it will introduce the actual slow
   // path call - where we need to insert a safepoint (parsepoint).
@@ -633,7 +635,8 @@
   auto *F = M->getFunction(GCSafepointPollName);
   assert(F && "gc.safepoint_poll function is missing");
   assert(F->getValueType() ==
-         FunctionType::get(Type::getVoidTy(M->getContext()), false) &&
+         FunctionType::get(Type::getVoidTy(M->getContext()), false,
+                           DL.getProgramAddressSpace()) &&
          "gc.safepoint_poll declared with wrong type");
   assert(!F->empty() && "gc.safepoint_poll must be a non-empty function");
   CallInst *PollCall = CallInst::Create(F, "", InsertBefore);
Index: lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
===================================================================
--- lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
+++ lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
@@ -1320,6 +1320,7 @@
   // arguments will be available here.  We can't insert afterwards since we may
   // be replacing a terminator.
   Instruction *InsertBefore = CS.getInstruction();
+  const auto &DL = InsertBefore->getModule()->getDataLayout();
   IRBuilder<> Builder(InsertBefore);
 
   ArrayRef<Value *> GCArgs(LiveVariables);
@@ -1367,7 +1368,8 @@
       for (Value *Arg : CallArgs)
         DomainTy.push_back(Arg->getType());
       auto *FTy = FunctionType::get(Type::getVoidTy(F->getContext()), DomainTy,
-                                    /* isVarArg = */ false);
+                                    /* isVarArg = */ false,
+                                    DL.getProgramAddressSpace());
 
       // Note: CallTarget can be a bitcast instruction of a symbol if there are
       // calls to @llvm.experimental.deoptimize with different argument types in
@@ -1794,9 +1796,11 @@
     return;
 
   Module *M = CS.getInstruction()->getModule();
+  const auto &DL = M->getDataLayout();
   // Use a dummy vararg function to actually hold the values live
   Function *Func = cast<Function>(M->getOrInsertFunction(
-      "__tmp_use", FunctionType::get(Type::getVoidTy(M->getContext()), true)));
+      "__tmp_use", FunctionType::get(Type::getVoidTy(M->getContext()), true,
+                                     DL.getProgramAddressSpace())));
   if (CS.isCall()) {
     // For call safepoints insert dummy calls right after safepoint
     Holders.push_back(CallInst::Create(Func, Values, "",
Index: lib/Transforms/Utils/CloneFunction.cpp
===================================================================
--- lib/Transforms/Utils/CloneFunction.cpp
+++ lib/Transforms/Utils/CloneFunction.cpp
@@ -240,7 +240,8 @@
 
   // Create a new function type...
   FunctionType *FTy = FunctionType::get(F->getFunctionType()->getReturnType(),
-                                    ArgTypes, F->getFunctionType()->isVarArg());
+                                    ArgTypes, F->getFunctionType()->isVarArg(),
+                                    F->getFunctionType()->getAddressSpace());
 
   // Create the new function...
   Function *NewF =
Index: lib/Transforms/Utils/CodeExtractor.cpp
===================================================================
--- lib/Transforms/Utils/CodeExtractor.cpp
+++ lib/Transforms/Utils/CodeExtractor.cpp
@@ -575,7 +575,8 @@
     paramTy.push_back(PointerType::getUnqual(StructTy));
   }
   FunctionType *funcType =
-                  FunctionType::get(RetTy, paramTy, false);
+                  FunctionType::get(RetTy, paramTy, false,
+                                    oldFunction->getAddressSpace());
 
   // Create the new function
   Function *newFunction = Function::Create(funcType,
Index: lib/Transforms/Utils/EscapeEnumerator.cpp
===================================================================
--- lib/Transforms/Utils/EscapeEnumerator.cpp
+++ lib/Transforms/Utils/EscapeEnumerator.cpp
@@ -21,10 +21,13 @@
 
 static Constant *getDefaultPersonalityFn(Module *M) {
   LLVMContext &C = M->getContext();
+  const DataLayout &DL = M->getDataLayout();
   Triple T(M->getTargetTriple());
   EHPersonality Pers = getDefaultEHPersonality(T);
+
   return M->getOrInsertFunction(getEHPersonalityName(Pers),
-                                FunctionType::get(Type::getInt32Ty(C), true));
+                                FunctionType::get(Type::getInt32Ty(C), true,
+                                                  DL.getProgramAddressSpace()));
 }
 
 IRBuilder<> *EscapeEnumerator::Next() {
Index: lib/Transforms/Utils/ModuleUtils.cpp
===================================================================
--- lib/Transforms/Utils/ModuleUtils.cpp
+++ lib/Transforms/Utils/ModuleUtils.cpp
@@ -22,8 +22,10 @@
 
 static void appendToGlobalArray(const char *Array, Module &M, Function *F,
                                 int Priority, Constant *Data) {
+  const DataLayout &DL = M.getDataLayout();
   IRBuilder<> IRB(M.getContext());
-  FunctionType *FnTy = FunctionType::get(IRB.getVoidTy(), false);
+  FunctionType *FnTy = FunctionType::get(IRB.getVoidTy(), false,
+                                         DL.getProgramAddressSpace());
 
   // Get the current set of static global constructors and add the new ctor
   // to the list.
@@ -141,9 +143,11 @@
 Function *llvm::declareSanitizerInitFunction(Module &M, StringRef InitName,
                                              ArrayRef<Type *> InitArgTypes) {
   assert(!InitName.empty() && "Expected init function name");
+  const DataLayout &DL = M.getDataLayout();
   Function *F = checkSanitizerInterfaceFunction(M.getOrInsertFunction(
       InitName,
-      FunctionType::get(Type::getVoidTy(M.getContext()), InitArgTypes, false),
+      FunctionType::get(Type::getVoidTy(M.getContext()), InitArgTypes, false,
+                        DL.getProgramAddressSpace()),
       AttributeList()));
   F->setLinkage(Function::ExternalLinkage);
   return F;
@@ -153,13 +157,15 @@
     Module &M, StringRef CtorName, StringRef InitName,
     ArrayRef<Type *> InitArgTypes, ArrayRef<Value *> InitArgs,
     StringRef VersionCheckName) {
+  const DataLayout &DL = M.getDataLayout();
   assert(!InitName.empty() && "Expected init function name");
   assert(InitArgs.size() == InitArgTypes.size() &&
          "Sanitizer's init function expects different number of arguments");
   Function *InitFunction =
       declareSanitizerInitFunction(M, InitName, InitArgTypes);
   Function *Ctor = Function::Create(
-      FunctionType::get(Type::getVoidTy(M.getContext()), false),
+      FunctionType::get(Type::getVoidTy(M.getContext()), false,
+                        DL.getProgramAddressSpace()),
       GlobalValue::InternalLinkage, CtorName, &M);
   BasicBlock *CtorBB = BasicBlock::Create(M.getContext(), "", Ctor);
   IRBuilder<> IRB(ReturnInst::Create(M.getContext(), CtorBB));
Index: lib/Transforms/Utils/SanitizerStats.cpp
===================================================================
--- lib/Transforms/Utils/SanitizerStats.cpp
+++ lib/Transforms/Utils/SanitizerStats.cpp
@@ -75,6 +75,8 @@
     return;
   }
 
+  const DataLayout &DL = M->getDataLayout();
+
   PointerType *Int8PtrTy = Type::getInt8PtrTy(M->getContext());
   IntegerType *Int32Ty = Type::getInt32Ty(M->getContext());
   Type *VoidTy = Type::getVoidTy(M->getContext());
@@ -92,7 +94,8 @@
   ModuleStatsGV->eraseFromParent();
 
   // Create a global constructor to register NewModuleStatsGV.
-  auto F = Function::Create(FunctionType::get(VoidTy, false),
+  auto F = Function::Create(FunctionType::get(VoidTy, false,
+                            DL.getProgramAddressSpace()),
                             GlobalValue::InternalLinkage, "", M);
   auto BB = BasicBlock::Create(M->getContext(), "", F);
   IRBuilder<> B(BB);
Index: lib/Transforms/Utils/SimplifyCFG.cpp
===================================================================
--- lib/Transforms/Utils/SimplifyCFG.cpp
+++ lib/Transforms/Utils/SimplifyCFG.cpp
@@ -4945,7 +4945,10 @@
 
   Array = new GlobalVariable(M, ArrayTy, /*constant=*/true,
                              GlobalVariable::PrivateLinkage, Initializer,
-                             "switch.table." + FuncName);
+                             "switch.table." + FuncName,
+                             /*InsertBefore=*/nullptr,
+                             GlobalValue::NotThreadLocal,
+                             DL.getProgramAddressSpace());
   Array->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
   Kind = ArrayKind;
 }
Index: lib/Transforms/Utils/ValueMapper.cpp
===================================================================
--- lib/Transforms/Utils/ValueMapper.cpp
+++ lib/Transforms/Utils/ValueMapper.cpp
@@ -881,7 +881,8 @@
     for (Type *Ty : FTy->params())
       Tys.push_back(TypeMapper->remapType(Ty));
     CS.mutateFunctionType(FunctionType::get(
-        TypeMapper->remapType(I->getType()), Tys, FTy->isVarArg()));
+        TypeMapper->remapType(I->getType()), Tys, FTy->isVarArg(),
+        FTy->getAddressSpace()));
     return;
   }
   if (auto *AI = dyn_cast<AllocaInst>(I))
Index: lib/Transforms/Vectorize/LoopVectorize.cpp
===================================================================
--- lib/Transforms/Vectorize/LoopVectorize.cpp
+++ lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -4758,6 +4758,7 @@
     setDebugLocFromInst(Builder, &I);
 
     Module *M = I.getParent()->getParent()->getParent();
+    const auto &DL = M->getDataLayout();
     auto *CI = cast<CallInst>(&I);
 
     StringRef FnName = CI->getCalledFunction()->getName();
@@ -4804,7 +4805,8 @@
         VectorF = M->getFunction(VFnName);
         if (!VectorF) {
           // Generate a declaration
-          FunctionType *FTy = FunctionType::get(RetTy, Tys, false);
+          FunctionType *FTy = FunctionType::get(RetTy, Tys, false,
+                                                DL.getProgramAddressSpace());
           VectorF =
               Function::Create(FTy, Function::ExternalLinkage, VFnName, M);
           VectorF->copyAttributesFrom(F);
Index: test/Bitcode/function-nonzero-address-spaces.ll
===================================================================
--- /dev/null
+++ test/Bitcode/function-nonzero-address-spaces.ll
@@ -0,0 +1,6 @@
+; RUN: llvm-as < %s | llvm-dis | FileCheck %s
+
+; CHECK: define void @main() addrspace(3)
+define void @main() addrspace(3) {
+  ret void
+}
Index: test/CodeGen/AVR/switch-lookup-table-in-progmem-space.ll
===================================================================
--- /dev/null
+++ test/CodeGen/AVR/switch-lookup-table-in-progmem-space.ll
@@ -0,0 +1,62 @@
+; RUN: opt -S -mtriple=avr -latesimplifycfg < %s | FileCheck %s
+
+target datalayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-n8-P1"
+
+; Switch lookup tables should be placed in program memory (address space 1).
+
+%MyType = type { i8, [0 x i8], [0 x i8] }
+
+define i8 @foo(i8 %arg) {
+start:
+  %_0 = alloca %MyType
+
+; CHECK: @switch.table.foo = {{.*}}addrspace(1) constant {{.*}}
+  switch i8 %arg, label %bb7 [
+    i8 0, label %bb1
+    i8 1, label %bb2
+    i8 2, label %bb3
+    i8 3, label %bb4
+    i8 4, label %bb5
+    i8 14, label %bb6
+  ]
+
+bb1:                                              ; preds = %start
+  %tmp = getelementptr inbounds %MyType, %MyType* %_0, i32 0, i32 0
+  store i8 1, i8* %tmp
+  br label %bb8
+
+bb2:                                              ; preds = %start
+  %tmp1 = getelementptr inbounds %MyType, %MyType* %_0, i32 0, i32 0
+  store i8 1, i8* %tmp1
+  br label %bb8
+
+bb3:                                              ; preds = %start
+  %tmp2 = getelementptr inbounds %MyType, %MyType* %_0, i32 0, i32 0
+  store i8 1, i8* %tmp2
+  br label %bb8
+
+bb4:                                              ; preds = %start
+  %tmp3 = getelementptr inbounds %MyType, %MyType* %_0, i32 0, i32 0
+  store i8 1, i8* %tmp3
+  br label %bb8
+
+bb5:                                              ; preds = %start
+  %tmp4 = getelementptr inbounds %MyType, %MyType* %_0, i32 0, i32 0
+  store i8 1, i8* %tmp4
+  br label %bb8
+
+bb6:                                              ; preds = %start
+  %tmp5 = getelementptr inbounds %MyType, %MyType* %_0, i32 0, i32 0
+  store i8 1, i8* %tmp5
+  br label %bb8
+
+bb7:                                              ; preds = %start
+  %tmp6 = getelementptr inbounds %MyType, %MyType* %_0, i32 0, i32 0
+  store i8 0, i8* %tmp6
+  br label %bb8
+
+bb8:                                              ; preds = %bb7, %bb6, %bb5, %bb4, %bb3, %bb2, %bb1
+  %tmp7 = bitcast %MyType* %_0 to i8*
+  %tmp8 = load i8, i8* %tmp7, align 1
+  ret i8 %tmp8
+}
Index: tools/llvm-stress/llvm-stress.cpp
===================================================================
--- tools/llvm-stress/llvm-stress.cpp
+++ tools/llvm-stress/llvm-stress.cpp
@@ -137,7 +137,8 @@
     Type::getInt8Ty(Context)
   };
 
-  auto *FuncTy = FunctionType::get(Type::getVoidTy(Context), ArgsTy, false);
+  auto *FuncTy = FunctionType::get(Type::getVoidTy(Context), ArgsTy, false,
+                                   M->getDataLayout().getProgramAddressSpace());
   // Pick a unique name to describe the input parameters
   Twine Name = "autogen_SD" + Twine{SeedCL};
   auto *Func = Function::Create(FuncTy, GlobalValue::ExternalLinkage, Name, M);
Index: unittests/Analysis/AliasAnalysisTest.cpp
===================================================================
--- unittests/Analysis/AliasAnalysisTest.cpp
+++ unittests/Analysis/AliasAnalysisTest.cpp
@@ -166,7 +166,7 @@
 TEST_F(AliasAnalysisTest, getModRefInfo) {
   // Setup function.
   FunctionType *FTy =
-      FunctionType::get(Type::getVoidTy(C), std::vector<Type *>(), false);
+      FunctionType::get(Type::getVoidTy(C), std::vector<Type *>(), false, 0);
   auto *F = cast<Function>(M.getOrInsertFunction("f", FTy));
   auto *BB = BasicBlock::Create(C, "entry", F);
   auto IntType = Type::getInt32Ty(C);
Index: unittests/Analysis/ScalarEvolutionTest.cpp
===================================================================
--- unittests/Analysis/ScalarEvolutionTest.cpp
+++ unittests/Analysis/ScalarEvolutionTest.cpp
@@ -63,7 +63,7 @@
 
 TEST_F(ScalarEvolutionsTest, SCEVUnknownRAUW) {
   FunctionType *FTy = FunctionType::get(Type::getVoidTy(Context),
-                                              std::vector<Type *>(), false);
+                                              std::vector<Type *>(), false, 0);
   Function *F = cast<Function>(M.getOrInsertFunction("f", FTy));
   BasicBlock *BB = BasicBlock::Create(Context, "entry", F);
   ReturnInst::Create(Context, nullptr, BB);
@@ -114,7 +114,8 @@
   Type *Ty = Type::getInt32Ty(Context);
   SmallVector<Type *, 10> Types;
   Types.append(10, Ty);
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(Context), Types, false);
+  FunctionType *FTy =
+          FunctionType::get(Type::getVoidTy(Context), Types, false, 0);
   Function *F = cast<Function>(M.getOrInsertFunction("f", FTy));
   BasicBlock *BB = BasicBlock::Create(Context, "entry", F);
   ReturnInst::Create(Context, nullptr, BB);
@@ -253,7 +254,7 @@
 
 TEST_F(ScalarEvolutionsTest, SimplifiedPHI) {
   FunctionType *FTy = FunctionType::get(Type::getVoidTy(Context),
-                                              std::vector<Type *>(), false);
+                                        std::vector<Type *>(), false, 0);
   Function *F = cast<Function>(M.getOrInsertFunction("f", FTy));
   BasicBlock *EntryBB = BasicBlock::Create(Context, "entry", F);
   BasicBlock *LoopBB = BasicBlock::Create(Context, "loop", F);
@@ -286,8 +287,8 @@
   auto *I8PtrTy = Type::getInt8PtrTy(Context);
   auto *I32Ty = Type::getInt32Ty(Context);
   auto *I32PtrTy = Type::getInt32PtrTy(Context);
-  FunctionType *FTy =
-      FunctionType::get(Type::getVoidTy(Context), std::vector<Type *>(), false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(Context),
+                                        std::vector<Type *>(), false, 0);
   Function *F = cast<Function>(M.getOrInsertFunction("f", FTy));
   BasicBlock *EntryBB = BasicBlock::Create(Context, "entry", F);
   BasicBlock *LoopBB = BasicBlock::Create(Context, "loop", F);
@@ -469,8 +470,8 @@
 }
 
 TEST_F(ScalarEvolutionsTest, CompareSCEVComplexity) {
-  FunctionType *FTy =
-      FunctionType::get(Type::getVoidTy(Context), std::vector<Type *>(), false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(Context),
+                                        std::vector<Type *>(), false, 0);
   Function *F = cast<Function>(M.getOrInsertFunction("f", FTy));
   BasicBlock *EntryBB = BasicBlock::Create(Context, "entry", F);
   BasicBlock *LoopBB = BasicBlock::Create(Context, "bb1", F);
@@ -539,8 +540,8 @@
   IntegerType *IntPtrTy = M.getDataLayout().getIntPtrType(Context);
   PointerType *IntPtrPtrTy = IntPtrTy->getPointerTo();
 
-  FunctionType *FTy =
-      FunctionType::get(Type::getVoidTy(Context), {IntPtrTy, IntPtrTy}, false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(Context),
+                                        {IntPtrTy, IntPtrTy}, false, 0);
   Function *F = cast<Function>(M.getOrInsertFunction("f", FTy));
   BasicBlock *EntryBB = BasicBlock::Create(Context, "entry", F);
 
@@ -576,7 +577,7 @@
   Type *ArgTys[] = {Type::getInt64Ty(Context), Ty32};
 
   FunctionType *FTy =
-      FunctionType::get(Type::getVoidTy(Context), ArgTys, false);
+      FunctionType::get(Type::getVoidTy(Context), ArgTys, false, 0);
   Function *F = cast<Function>(M.getOrInsertFunction("f", FTy));
 
   Argument *A1 = &*F->arg_begin();
@@ -810,7 +811,7 @@
   //   %gep95 = getelementptr i8, i8* %gep91, i64 %dec94
   //   ret void
   // }
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(Context), {}, false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(Context), {}, false, 0);
   Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
 
   BasicBlock *EntryBB = BasicBlock::Create(Context, "entry", F);
@@ -889,7 +890,7 @@
   Type *T_pint64 = T_int64->getPointerTo(10);
 
   FunctionType *FTy =
-      FunctionType::get(Type::getVoidTy(Context), {T_pint64}, false);
+      FunctionType::get(Type::getVoidTy(Context), {T_pint64}, false, 0);
   Function *F = cast<Function>(NIM.getOrInsertFunction("foo", FTy));
 
   Argument *Arg = &*F->arg_begin();
@@ -962,7 +963,7 @@
   Type *T_pint64 = T_int64->getPointerTo(10);
 
   FunctionType *FTy =
-      FunctionType::get(Type::getVoidTy(Context), {T_pint64}, false);
+      FunctionType::get(Type::getVoidTy(Context), {T_pint64}, false, 0);
   Function *F = cast<Function>(NIM.getOrInsertFunction("foo", FTy));
 
   BasicBlock *Top = BasicBlock::Create(Context, "top", F);
@@ -1044,7 +1045,7 @@
   Type *T_pint64 = T_int64->getPointerTo(10);
 
   FunctionType *FTy =
-      FunctionType::get(Type::getVoidTy(Context), {T_pint64}, false);
+      FunctionType::get(Type::getVoidTy(Context), {T_pint64}, false, 0);
   Function *F = cast<Function>(NIM.getOrInsertFunction("foo", FTy));
 
   Argument *Arg = &*F->arg_begin();
Index: unittests/Analysis/TBAATest.cpp
===================================================================
--- unittests/Analysis/TBAATest.cpp
+++ unittests/Analysis/TBAATest.cpp
@@ -33,7 +33,7 @@
 
 static StoreInst *getFunctionWithSingleStore(Module *M, StringRef Name) {
   auto &C = M->getContext();
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), {});
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), {}, 0);
   auto *F = cast<Function>(M->getOrInsertFunction(Name, FTy));
   auto *BB = BasicBlock::Create(C, "entry", F);
   auto *IntType = Type::getInt32Ty(C);
Index: unittests/Analysis/TargetLibraryInfoTest.cpp
===================================================================
--- unittests/Analysis/TargetLibraryInfoTest.cpp
+++ unittests/Analysis/TargetLibraryInfoTest.cpp
@@ -63,7 +63,8 @@
   parseAssembly("%foo = type { %foo }\n");
 
   auto *StructTy = M->getTypeByName("foo");
-  auto *InvalidFTy = FunctionType::get(StructTy, /*isVarArg=*/false);
+  auto *InvalidFTy = FunctionType::get(StructTy, /*isVarArg=*/false,
+                                       /*AddrSpace=*/0);
 
   for (unsigned FI = 0; FI != LibFunc::NumLibFuncs; ++FI) {
     LibFunc LF = (LibFunc)FI;
Index: unittests/IR/FunctionTest.cpp
===================================================================
--- unittests/IR/FunctionTest.cpp
+++ unittests/IR/FunctionTest.cpp
@@ -18,7 +18,7 @@
   LLVMContext C;
 
   Type *ArgTypes[] = {Type::getInt8Ty(C), Type::getInt32Ty(C)};
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), ArgTypes, false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), ArgTypes, false, 0);
 
   // Functions start out with lazy arguments.
   std::unique_ptr<Function> F(
@@ -40,7 +40,7 @@
   LLVMContext C;
 
   Type *ArgTypes[] = {Type::getInt8Ty(C), Type::getInt32Ty(C)};
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), ArgTypes, false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), ArgTypes, false, 0);
   std::unique_ptr<Function> F1(
       Function::Create(FTy, GlobalValue::ExternalLinkage, "F1"));
   std::unique_ptr<Function> F2(
@@ -116,7 +116,7 @@
   Module M("test", C);
 
   llvm::Function *F =
-      Function::Create(llvm::FunctionType::get(llvm::Type::getVoidTy(C), false),
+      Function::Create(llvm::FunctionType::get(llvm::Type::getVoidTy(C), false, 0),
                        llvm::GlobalValue::ExternalLinkage, "F", &M);
 
   F->setSection(".text.test");
@@ -130,4 +130,18 @@
   EXPECT_TRUE(F->hasSection());
 }
 
+// Test setting and retrieving fields stored in subclass data bitfield
+// through the associated FunctionType
+TEST(FunctionTest, subclassData) {
+  LLVMContext C;
+  Module M("test", C);
+
+  llvm::Function *F =
+      Function::Create(llvm::FunctionType::get(llvm::Type::getVoidTy(C), true,
+                       180), GlobalValue::ExternalLinkage);
+
+  EXPECT_EQ(false, F->isVarArg());
+  EXPECT_EQ(180u, F->getAddressSpace());
+}
+
 } // end namespace
Index: unittests/IR/IRBuilderTest.cpp
===================================================================
--- unittests/IR/IRBuilderTest.cpp
+++ unittests/IR/IRBuilderTest.cpp
@@ -29,7 +29,7 @@
   void SetUp() override {
     M.reset(new Module("MyModule", Ctx));
     FunctionType *FTy = FunctionType::get(Type::getVoidTy(Ctx),
-                                          /*isVarArg=*/false);
+                                          /*isVarArg=*/false, /*AddrSpace=*/0);
     F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
     BB = BasicBlock::Create(Ctx, "", F);
     GV = new GlobalVariable(*M, Type::getFloatTy(Ctx), true,
@@ -229,7 +229,7 @@
 
   // Test a call with FMF.
   auto CalleeTy = FunctionType::get(Type::getFloatTy(Ctx),
-                                    /*isVarArg=*/false);
+                                    /*isVarArg=*/false, /*AddrSpace=*/0);
   auto Callee =
       Function::Create(CalleeTy, Function::ExternalLinkage, "", M.get());
 
@@ -426,7 +426,7 @@
 
 TEST_F(IRBuilderTest, DebugLoc) {
   auto CalleeTy = FunctionType::get(Type::getVoidTy(Ctx),
-                                    /*isVarArg=*/false);
+                                    /*isVarArg=*/false, /*AddrSpace=*/0);
   auto Callee =
       Function::Create(CalleeTy, Function::ExternalLinkage, "", M.get());
 
Index: unittests/IR/InstructionsTest.cpp
===================================================================
--- unittests/IR/InstructionsTest.cpp
+++ unittests/IR/InstructionsTest.cpp
@@ -61,7 +61,7 @@
     FArgTypes.push_back(Type::getInt32Ty(Ctx));
     FArgTypes.push_back(Type::getInt64Ty(Ctx));
     FunctionType *FTy =
-        FunctionType::get(Type::getVoidTy(Ctx), FArgTypes, false);
+        FunctionType::get(Type::getVoidTy(Ctx), FArgTypes, false, 0);
     F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
   }
 
@@ -495,7 +495,7 @@
   LLVMContext C;
   Type *Int32Ty = Type::getInt32Ty(C);
   Type *ArgTys[] = {Int32Ty, Int32Ty, Int32Ty};
-  Type *FnTy = FunctionType::get(Int32Ty, ArgTys, /*isVarArg=*/false);
+  Type *FnTy = FunctionType::get(Int32Ty, ArgTys, /*isVarArg=*/false, 0);
   Value *Callee = Constant::getNullValue(FnTy->getPointerTo());
   Value *Args[] = {
     ConstantInt::get(Int32Ty, 1),
@@ -528,7 +528,7 @@
 TEST(InstructionsTest, AlterCallBundles) {
   LLVMContext C;
   Type *Int32Ty = Type::getInt32Ty(C);
-  Type *FnTy = FunctionType::get(Int32Ty, Int32Ty, /*isVarArg=*/false);
+  Type *FnTy = FunctionType::get(Int32Ty, Int32Ty, /*isVarArg=*/false, 0);
   Value *Callee = Constant::getNullValue(FnTy->getPointerTo());
   Value *Args[] = {ConstantInt::get(Int32Ty, 42)};
   OperandBundleDef OldBundle("before", UndefValue::get(Int32Ty));
@@ -555,7 +555,7 @@
 TEST(InstructionsTest, AlterInvokeBundles) {
   LLVMContext C;
   Type *Int32Ty = Type::getInt32Ty(C);
-  Type *FnTy = FunctionType::get(Int32Ty, Int32Ty, /*isVarArg=*/false);
+  Type *FnTy = FunctionType::get(Int32Ty, Int32Ty, /*isVarArg=*/false, 0);
   Value *Callee = Constant::getNullValue(FnTy->getPointerTo());
   Value *Args[] = {ConstantInt::get(Int32Ty, 42)};
   std::unique_ptr<BasicBlock> NormalDest(BasicBlock::Create(C));
Index: unittests/IR/LegacyPassManagerTest.cpp
===================================================================
--- unittests/IR/LegacyPassManagerTest.cpp
+++ unittests/IR/LegacyPassManagerTest.cpp
@@ -413,14 +413,16 @@
       FunctionType *FuncTy_0 = FunctionType::get(
           /*Result=*/IntegerType::get(Context, 32),
           /*Params=*/FuncTy_0_args,
-          /*isVarArg=*/false);
+          /*isVarArg=*/false,
+          /*AddrSpace=*/0);
 
       std::vector<Type*>FuncTy_2_args;
       FuncTy_2_args.push_back(IntegerType::get(Context, 1));
       FunctionType *FuncTy_2 = FunctionType::get(
           /*Result=*/Type::getVoidTy(Context),
           /*Params=*/FuncTy_2_args,
-          /*isVarArg=*/false);
+          /*isVarArg=*/false,
+          /*AddrSpace=*/0);
 
       // Function Declarations
 
Index: unittests/IR/MetadataTest.cpp
===================================================================
--- unittests/IR/MetadataTest.cpp
+++ unittests/IR/MetadataTest.cpp
@@ -118,7 +118,7 @@
   }
   Function *getFunction(StringRef Name) {
     return cast<Function>(M.getOrInsertFunction(
-        Name, FunctionType::get(Type::getVoidTy(Context), None, false)));
+        Name, FunctionType::get(Type::getVoidTy(Context), None, false, 0)));
   }
 };
 typedef MetadataTest MDStringTest;
@@ -346,7 +346,7 @@
 
 TEST_F(MDNodeTest, PrintFromFunction) {
   Module M("test", Context);
-  auto *FTy = FunctionType::get(Type::getVoidTy(Context), false);
+  auto *FTy = FunctionType::get(Type::getVoidTy(Context), false, 0);
   auto *F0 = Function::Create(FTy, GlobalValue::ExternalLinkage, "F0", &M);
   auto *F1 = Function::Create(FTy, GlobalValue::ExternalLinkage, "F1", &M);
   auto *BB0 = BasicBlock::Create(Context, "entry", F0);
@@ -371,10 +371,11 @@
 
   auto *Intrinsic =
       Function::Create(FunctionType::get(Type::getVoidTy(Context),
-                                         Type::getMetadataTy(Context), false),
+                                         Type::getMetadataTy(Context), false,
+                                         0),
                        GlobalValue::ExternalLinkage, "llvm.intrinsic", &M);
 
-  auto *FTy = FunctionType::get(Type::getVoidTy(Context), false);
+  auto *FTy = FunctionType::get(Type::getVoidTy(Context), false, 0);
   auto *F0 = Function::Create(FTy, GlobalValue::ExternalLinkage, "F0", &M);
   auto *F1 = Function::Create(FTy, GlobalValue::ExternalLinkage, "F1", &M);
   auto *BB0 = BasicBlock::Create(Context, "entry", F0);
Index: unittests/IR/PatternMatch.cpp
===================================================================
--- unittests/IR/PatternMatch.cpp
+++ unittests/IR/PatternMatch.cpp
@@ -40,7 +40,8 @@
   PatternMatchTest()
       : M(new Module("PatternMatchTestModule", Ctx)),
         F(Function::Create(
-            FunctionType::get(Type::getVoidTy(Ctx), /* IsVarArg */ false),
+            FunctionType::get(Type::getVoidTy(Ctx), /*IsVarArg=*/false,
+                              /*AddrSpace=*/0),
             Function::ExternalLinkage, "f", M.get())),
         BB(BasicBlock::Create(Ctx, "entry", F)), IRB(BB) {}
 };
Index: unittests/IR/TypeBuilderTest.cpp
===================================================================
--- unittests/IR/TypeBuilderTest.cpp
+++ unittests/IR/TypeBuilderTest.cpp
@@ -148,41 +148,41 @@
 TEST(TypeBuilderTest, Functions) {
   LLVMContext Context;
   std::vector<Type*> params;
-  EXPECT_EQ(FunctionType::get(Type::getVoidTy(Context), params, false),
+  EXPECT_EQ(FunctionType::get(Type::getVoidTy(Context), params, false, 0),
             (TypeBuilder<void(), true>::get(Context)));
-  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, true),
+  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, true, 0),
             (TypeBuilder<int8_t(...), false>::get(Context)));
   params.push_back(TypeBuilder<int32_t *, false>::get(Context));
-  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, false),
+  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, false, 0),
             (TypeBuilder<int8_t(const int32_t *), false>::get(Context)));
-  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, true),
+  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, true, 0),
             (TypeBuilder<int8_t(const int32_t *, ...), false>::get(Context)));
   params.push_back(TypeBuilder<char *, false>::get(Context));
-  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, false),
+  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, false, 0),
             (TypeBuilder<int8_t(int32_t *, void *), false>::get(Context)));
-  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, true),
+  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, true, 0),
             (TypeBuilder<int8_t(int32_t *, char *, ...), false>::get(Context)));
   params.push_back(TypeBuilder<char, false>::get(Context));
   EXPECT_EQ(
-      FunctionType::get(Type::getInt8Ty(Context), params, false),
+      FunctionType::get(Type::getInt8Ty(Context), params, false, 0),
       (TypeBuilder<int8_t(int32_t *, void *, char), false>::get(Context)));
   EXPECT_EQ(
-      FunctionType::get(Type::getInt8Ty(Context), params, true),
+      FunctionType::get(Type::getInt8Ty(Context), params, true, 0),
       (TypeBuilder<int8_t(int32_t *, char *, char, ...), false>::get(Context)));
   params.push_back(TypeBuilder<char, false>::get(Context));
-  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, false),
+  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, false, 0),
             (TypeBuilder<int8_t(int32_t *, void *, char, char), false>::get(
                 Context)));
   EXPECT_EQ(
-      FunctionType::get(Type::getInt8Ty(Context), params, true),
+      FunctionType::get(Type::getInt8Ty(Context), params, true, 0),
       (TypeBuilder<int8_t(int32_t *, char *, char, char, ...), false>::get(
           Context)));
   params.push_back(TypeBuilder<char, false>::get(Context));
   EXPECT_EQ(
-      FunctionType::get(Type::getInt8Ty(Context), params, false),
+      FunctionType::get(Type::getInt8Ty(Context), params, false, 0),
       (TypeBuilder<int8_t(int32_t *, void *, char, char, char), false>::get(
           Context)));
-  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, true),
+  EXPECT_EQ(FunctionType::get(Type::getInt8Ty(Context), params, true, 0),
             (TypeBuilder<int8_t(int32_t *, char *, char, char, char, ...),
                          false>::get(Context)));
 }
Index: unittests/IR/UserTest.cpp
===================================================================
--- unittests/IR/UserTest.cpp
+++ unittests/IR/UserTest.cpp
@@ -121,7 +121,7 @@
 TEST(UserTest, PersonalityUser) {
   LLVMContext Context;
   Module M("", Context);
-  FunctionType *RetVoidTy = FunctionType::get(Type::getVoidTy(Context), false);
+  FunctionType *RetVoidTy = FunctionType::get(Type::getVoidTy(Context), false, 0);
   Function *PersonalityF = Function::Create(
       RetVoidTy, GlobalValue::ExternalLinkage, "PersonalityFn", &M);
   Function *TestF =
Index: unittests/IR/VerifierTest.cpp
===================================================================
--- unittests/IR/VerifierTest.cpp
+++ unittests/IR/VerifierTest.cpp
@@ -27,7 +27,8 @@
 TEST(VerifierTest, Branch_i1) {
   LLVMContext C;
   Module M("M", C);
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false,
+                                        /*AddrSpace=*/0);
   Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
   BasicBlock *Entry = BasicBlock::Create(C, "entry", F);
   BasicBlock *Exit = BasicBlock::Create(C, "exit", F);
@@ -50,7 +51,8 @@
 TEST(VerifierTest, InvalidRetAttribute) {
   LLVMContext C;
   Module M("M", C);
-  FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
+  FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false,
+                                        /*AddrSpace=*/0);
   Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
   AttributeList AS = F->getAttributes();
   F->setAttributes(
@@ -68,7 +70,8 @@
   Module M1("M1", C);
   Module M2("M2", C);
   Module M3("M3", C);
-  FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
+  FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false,
+                                        /*AddrSpace=*/0);
   Function *F1 = cast<Function>(M1.getOrInsertFunction("foo1", FTy));
   Function *F2 = cast<Function>(M2.getOrInsertFunction("foo2", FTy));
   Function *F3 = cast<Function>(M3.getOrInsertFunction("foo3", FTy));
@@ -139,7 +142,8 @@
   LLVMContext C;
   Module M("M", C);
 
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
+  FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false,
+                                        /*AddrSpace=*/0);
   Function::Create(FTy, GlobalValue::LinkOnceODRLinkage, "foo", &M);
   std::string Error;
   raw_string_ostream ErrorOS(Error);
@@ -183,7 +187,7 @@
                        GlobalValue::ExternalLinkage, nullptr, "g");
 
     auto *F = cast<Function>(M.getOrInsertFunction(
-        "f", FunctionType::get(Type::getVoidTy(C), false)));
+        "f", FunctionType::get(Type::getVoidTy(C), false, 0)));
     IRBuilder<> Builder(BasicBlock::Create(C, "", F));
     Builder.CreateUnreachable();
     F->setSubprogram(DIB.createFunction(CU, "f", "f",
Index: unittests/IR/WaymarkTest.cpp
===================================================================
--- unittests/IR/WaymarkTest.cpp
+++ unittests/IR/WaymarkTest.cpp
@@ -26,7 +26,7 @@
   std::transform(tail, tail + 22, values, [&](char c) {
     return ConstantInt::get(Type::getInt8Ty(Context), c);
   });
-  FunctionType *FT = FunctionType::get(Type::getVoidTy(Context), true);
+  FunctionType *FT = FunctionType::get(Type::getVoidTy(Context), true, 0);
   std::unique_ptr<Function> F(
       Function::Create(FT, GlobalValue::ExternalLinkage));
   const CallInst *A = CallInst::Create(F.get(), makeArrayRef(values));
Index: unittests/ProfileData/InstrProfTest.cpp
===================================================================
--- unittests/ProfileData/InstrProfTest.cpp
+++ unittests/ProfileData/InstrProfTest.cpp
@@ -286,7 +286,7 @@
   LLVMContext Ctx;
   std::unique_ptr<Module> M(new Module("MyModule", Ctx));
   FunctionType *FTy = FunctionType::get(Type::getVoidTy(Ctx),
-                                        /*isVarArg=*/false);
+                                        /*isVarArg=*/false, /*AddrSpace=*/0);
   Function *F =
       Function::Create(FTy, Function::ExternalLinkage, "caller", M.get());
   BasicBlock *BB = BasicBlock::Create(Ctx, "", F);
@@ -893,7 +893,7 @@
   LLVMContext Ctx;
   std::unique_ptr<Module> M = llvm::make_unique<Module>("MyModule.cpp", Ctx);
   FunctionType *FTy = FunctionType::get(Type::getVoidTy(Ctx),
-                                        /*isVarArg=*/false);
+                                        /*isVarArg=*/false, /*AddrSpace=*/0);
   Function::Create(FTy, Function::ExternalLinkage, "Gfoo", M.get());
   Function::Create(FTy, Function::ExternalLinkage, "Gblah", M.get());
   Function::Create(FTy, Function::ExternalLinkage, "Gbar", M.get());
Index: unittests/Transforms/Utils/Cloning.cpp
===================================================================
--- unittests/Transforms/Utils/Cloning.cpp
+++ unittests/Transforms/Utils/Cloning.cpp
@@ -158,7 +158,7 @@
 
 TEST_F(CloneInstruction, Attributes) {
   Type *ArgTy1[] = { Type::getInt32PtrTy(context) };
-  FunctionType *FT1 =  FunctionType::get(Type::getVoidTy(context), ArgTy1, false);
+  FunctionType *FT1 =  FunctionType::get(Type::getVoidTy(context), ArgTy1, false, 0);
 
   Function *F1 = Function::Create(FT1, Function::ExternalLinkage);
   BasicBlock *BB = BasicBlock::Create(context, "", F1);
@@ -183,7 +183,7 @@
 
 TEST_F(CloneInstruction, CallingConvention) {
   Type *ArgTy1[] = { Type::getInt32PtrTy(context) };
-  FunctionType *FT1 =  FunctionType::get(Type::getVoidTy(context), ArgTy1, false);
+  FunctionType *FT1 =  FunctionType::get(Type::getVoidTy(context), ArgTy1, false, 0);
 
   Function *F1 = Function::Create(FT1, Function::ExternalLinkage);
   F1->setCallingConv(CallingConv::Cold);
@@ -206,7 +206,7 @@
 
 TEST_F(CloneInstruction, DuplicateInstructionsToSplit) {
   Type *ArgTy1[] = {Type::getInt32PtrTy(context)};
-  FunctionType *FT = FunctionType::get(Type::getVoidTy(context), ArgTy1, false);
+  FunctionType *FT = FunctionType::get(Type::getVoidTy(context), ArgTy1, false, 0);
   V = new Argument(Type::getInt32Ty(context));
 
   Function *F = Function::Create(FT, Function::ExternalLinkage);
@@ -267,7 +267,7 @@
   }
 
   void CreateOldFunc() {
-    FunctionType* FuncType = FunctionType::get(Type::getVoidTy(C), false);
+    FunctionType* FuncType = FunctionType::get(Type::getVoidTy(C), false, 0);
     OldFunc = Function::Create(FuncType, GlobalValue::PrivateLinkage, "f", M);
     CreateOldFunctionBodyAndDI();
   }
@@ -484,7 +484,7 @@
     DIBuilder DBuilder(*OldM);
     IRBuilder<> IBuilder(C);
 
-    auto *FuncType = FunctionType::get(Type::getVoidTy(C), false);
+    auto *FuncType = FunctionType::get(Type::getVoidTy(C), false, 0);
     auto *PersFn = Function::Create(FuncType, GlobalValue::ExternalLinkage,
                                     "persfn", OldM);
     auto *F =
Index: unittests/Transforms/Utils/IntegerDivision.cpp
===================================================================
--- unittests/Transforms/Utils/IntegerDivision.cpp
+++ unittests/Transforms/Utils/IntegerDivision.cpp
@@ -27,7 +27,7 @@
 
   SmallVector<Type*, 2> ArgTys(2, Builder.getInt32Ty());
   Function *F = Function::Create(FunctionType::get(Builder.getInt32Ty(),
-                                                   ArgTys, false),
+                                                   ArgTys, false, 0),
                                  GlobalValue::ExternalLinkage, "F", &M);
   assert(F->arg_size() == 2);
 
@@ -57,7 +57,7 @@
 
   SmallVector<Type*, 2> ArgTys(2, Builder.getInt32Ty());
   Function *F = Function::Create(FunctionType::get(Builder.getInt32Ty(),
-                                                   ArgTys, false),
+                                                   ArgTys, false, 0),
                                  GlobalValue::ExternalLinkage, "F", &M);
   assert(F->arg_size() == 2);
 
@@ -87,7 +87,7 @@
 
   SmallVector<Type*, 2> ArgTys(2, Builder.getInt32Ty());
   Function *F = Function::Create(FunctionType::get(Builder.getInt32Ty(),
-                                                   ArgTys, false),
+                                                   ArgTys, false, 0),
                                  GlobalValue::ExternalLinkage, "F", &M);
   assert(F->arg_size() == 2);
 
@@ -117,7 +117,7 @@
 
   SmallVector<Type*, 2> ArgTys(2, Builder.getInt32Ty());
   Function *F = Function::Create(FunctionType::get(Builder.getInt32Ty(),
-                                                   ArgTys, false),
+                                                   ArgTys, false, 0),
                                  GlobalValue::ExternalLinkage, "F", &M);
   assert(F->arg_size() == 2);
 
@@ -148,7 +148,7 @@
 
   SmallVector<Type*, 2> ArgTys(2, Builder.getInt64Ty());
   Function *F = Function::Create(FunctionType::get(Builder.getInt64Ty(),
-                                                   ArgTys, false),
+                                                   ArgTys, false, 0),
                                  GlobalValue::ExternalLinkage, "F", &M);
   assert(F->arg_size() == 2);
 
@@ -178,7 +178,7 @@
 
   SmallVector<Type*, 2> ArgTys(2, Builder.getInt64Ty());
   Function *F = Function::Create(FunctionType::get(Builder.getInt64Ty(),
-                                                   ArgTys, false),
+                                                   ArgTys, false, 0),
                                  GlobalValue::ExternalLinkage, "F", &M);
   assert(F->arg_size() == 2);
 
@@ -208,7 +208,7 @@
 
   SmallVector<Type*, 2> ArgTys(2, Builder.getInt64Ty());
   Function *F = Function::Create(FunctionType::get(Builder.getInt64Ty(),
-                                                   ArgTys, false),
+                                                   ArgTys, false, 0),
                                  GlobalValue::ExternalLinkage, "F", &M);
   assert(F->arg_size() == 2);
 
@@ -238,7 +238,7 @@
 
   SmallVector<Type*, 2> ArgTys(2, Builder.getInt64Ty());
   Function *F = Function::Create(FunctionType::get(Builder.getInt64Ty(),
-                                                   ArgTys, false),
+                                                   ArgTys, false, 0),
                                  GlobalValue::ExternalLinkage, "F", &M);
   assert(F->arg_size() == 2);
 
Index: unittests/Transforms/Utils/Local.cpp
===================================================================
--- unittests/Transforms/Utils/Local.cpp
+++ unittests/Transforms/Utils/Local.cpp
@@ -64,7 +64,7 @@
   IRBuilder<> B(C);
 
   std::unique_ptr<Function> F(
-      Function::Create(FunctionType::get(B.getVoidTy(), false),
+      Function::Create(FunctionType::get(B.getVoidTy(), false, 0),
                        GlobalValue::ExternalLinkage, "F"));
   BasicBlock *Entry(BasicBlock::Create(C, "", F.get()));
   BasicBlock *BB(BasicBlock::Create(C, "", F.get()));