diff --git a/llvm/include/llvm/CodeGen/MachineFunction.h b/llvm/include/llvm/CodeGen/MachineFunction.h
index 5bb453d..f50b48f 100644
--- a/llvm/include/llvm/CodeGen/MachineFunction.h
+++ b/llvm/include/llvm/CodeGen/MachineFunction.h
@@ -37,6 +37,7 @@
 class Pass;
 class TargetMachine;
 class TargetRegisterClass;
+struct MachinePointerInfo;
 
 template <>
 struct ilist_traits<MachineBasicBlock>
@@ -372,6 +373,13 @@
                                           int64_t o, uint64_t s,
                                           unsigned base_alignment);
 
+  /// getMachineMemOperand - Allocate a new MachineMemOperand.
+  /// MachineMemOperands are owned by the MachineFunction and need not be
+  /// explicitly deallocated.
+  MachineMemOperand *getMachineMemOperand(MachinePointerInfo PtrInfo,
+                                          unsigned f, uint64_t s,
+                                          unsigned base_alignment);
+  
   /// getMachineMemOperand - Allocate a new MachineMemOperand by copying
   /// an existing one, adjusting by an offset and using the given size.
   /// MachineMemOperands are owned by the MachineFunction and need not be
diff --git a/llvm/include/llvm/CodeGen/MachineMemOperand.h b/llvm/include/llvm/CodeGen/MachineMemOperand.h
index b9b35e6..0386c19 100644
--- a/llvm/include/llvm/CodeGen/MachineMemOperand.h
+++ b/llvm/include/llvm/CodeGen/MachineMemOperand.h
@@ -29,8 +29,14 @@
 /// or to virtual locations (such as frame indices) that are exposed during
 /// codegen.
 struct MachinePointerInfo {
+  /// V - This is the IR pointer value for the access, or it is null if unknown.
+  /// If this is null, then the access is to a pointer in the default address
+  /// space.
   const Value *V;
+  
+  /// Offset - This is an offset from the base Value*.
   int64_t Offset;
+  
   MachinePointerInfo(const Value *v, int64_t offset) : V(v), Offset(offset) {}
 };
   
@@ -64,9 +70,9 @@
   };
 
   /// MachineMemOperand - Construct an MachineMemOperand object with the
-  /// specified address Value, flags, offset, size, and base alignment.
-  MachineMemOperand(const Value *v, unsigned int f, int64_t o, uint64_t s,
-                    unsigned int base_alignment);
+  /// specified PtrInfo, flags, size, and base alignment.
+  MachineMemOperand(MachinePointerInfo PtrInfo, unsigned flags, uint64_t s,
+                    unsigned base_alignment);
 
   /// getValue - Return the base address of the memory access. This may either
   /// be a normal LLVM IR Value, or one of the special values used in CodeGen.
diff --git a/llvm/lib/CodeGen/MachineFunction.cpp b/llvm/lib/CodeGen/MachineFunction.cpp
index 0171700..75edd25 100644
--- a/llvm/lib/CodeGen/MachineFunction.cpp
+++ b/llvm/lib/CodeGen/MachineFunction.cpp
@@ -193,17 +193,23 @@
 MachineFunction::getMachineMemOperand(const Value *v, unsigned f,
                                       int64_t o, uint64_t s,
                                       unsigned base_alignment) {
-  return new (Allocator) MachineMemOperand(v, f, o, s, base_alignment);
+  return new (Allocator) MachineMemOperand(MachinePointerInfo(v, o), f,
+                                           s, base_alignment);
+}
+
+MachineMemOperand *
+MachineFunction::getMachineMemOperand(MachinePointerInfo PtrInfo, unsigned f,
+                                      uint64_t s, unsigned base_alignment) {
+  return new (Allocator) MachineMemOperand(PtrInfo, f, s, base_alignment);
 }
 
 MachineMemOperand *
 MachineFunction::getMachineMemOperand(const MachineMemOperand *MMO,
                                       int64_t Offset, uint64_t Size) {
   return new (Allocator)
-             MachineMemOperand(MMO->getValue(), MMO->getFlags(),
-                               int64_t(uint64_t(MMO->getOffset()) +
-                                       uint64_t(Offset)),
-                               Size, MMO->getBaseAlignment());
+             MachineMemOperand(MachinePointerInfo(MMO->getValue(),
+                                                  MMO->getOffset()+Offset),
+                               MMO->getFlags(), Size, MMO->getBaseAlignment());
 }
 
 MachineInstr::mmo_iterator
diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index 08871b0..a953597 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -335,11 +335,12 @@
 // MachineMemOperand Implementation
 //===----------------------------------------------------------------------===//
 
-MachineMemOperand::MachineMemOperand(const Value *v, unsigned int f,
-                                     int64_t o, uint64_t s, unsigned int a)
-  : PtrInfo(v, o), Size(s),
+MachineMemOperand::MachineMemOperand(MachinePointerInfo ptrinfo, unsigned f,
+                                     uint64_t s, unsigned int a)
+  : PtrInfo(ptrinfo), Size(s),
     Flags((f & ((1 << MOMaxBits) - 1)) | ((Log2_32(a) + 1) << MOMaxBits)) {
-  assert((v == 0 || isa<PointerType>(v->getType())) && "invalid pointer value");
+  assert((PtrInfo.V == 0 || isa<PointerType>(PtrInfo.V->getType())) &&
+         "invalid pointer value");
   assert(getBaseAlignment() == a && "Alignment is not a power of 2!");
   assert((isLoad() || isStore()) && "Not a load/store!");
 }