diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 0ba65ab..b511c01 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -3263,7 +3263,8 @@
 static SDValue getMemcpyLoadsAndStores(SelectionDAG &DAG, DebugLoc dl,
                                        SDValue Chain, SDValue Dst,
                                        SDValue Src, uint64_t Size,
-                                       unsigned Align, bool AlwaysInline,
+                                       unsigned Align, bool isVol,
+                                       bool AlwaysInline,
                                        const Value *DstSV, uint64_t DstSVOff,
                                        const Value *SrcSV, uint64_t SrcSVOff) {
   const TargetLowering &TLI = DAG.getTargetLoweringInfo();
@@ -3319,7 +3320,7 @@
       Value = getMemsetStringVal(VT, dl, DAG, TLI, Str, SrcOff);
       Store = DAG.getStore(Chain, dl, Value,
                            getMemBasePlusOffset(Dst, DstOff, DAG),
-                           DstSV, DstSVOff + DstOff, false, false, Align);
+                           DstSV, DstSVOff + DstOff, isVol, false, Align);
     } else {
       // The type might not be legal for the target.  This should only happen
       // if the type is smaller than a legal type, as on PPC, so the right
@@ -3330,11 +3331,11 @@
       assert(NVT.bitsGE(VT));
       Value = DAG.getExtLoad(ISD::EXTLOAD, dl, NVT, Chain,
                              getMemBasePlusOffset(Src, SrcOff, DAG),
-                             SrcSV, SrcSVOff + SrcOff, VT, false, false,
+                             SrcSV, SrcSVOff + SrcOff, VT, isVol, false,
                              MinAlign(SrcAlign, SrcOff));
       Store = DAG.getTruncStore(Chain, dl, Value,
                                 getMemBasePlusOffset(Dst, DstOff, DAG),
-                                DstSV, DstSVOff + DstOff, VT, false, false,
+                                DstSV, DstSVOff + DstOff, VT, isVol, false,
                                 Align);
     }
     OutChains.push_back(Store);
@@ -3349,7 +3350,8 @@
 static SDValue getMemmoveLoadsAndStores(SelectionDAG &DAG, DebugLoc dl,
                                         SDValue Chain, SDValue Dst,
                                         SDValue Src, uint64_t Size,
-                                        unsigned Align,bool AlwaysInline,
+                                        unsigned Align,  bool isVol,
+                                        bool AlwaysInline,
                                         const Value *DstSV, uint64_t DstSVOff,
                                         const Value *SrcSV, uint64_t SrcSVOff) {
   const TargetLowering &TLI = DAG.getTargetLoweringInfo();
@@ -3397,7 +3399,7 @@
 
     Value = DAG.getLoad(VT, dl, Chain,
                         getMemBasePlusOffset(Src, SrcOff, DAG),
-                        SrcSV, SrcSVOff + SrcOff, false, false, SrcAlign);
+                        SrcSV, SrcSVOff + SrcOff, isVol, false, SrcAlign);
     LoadValues.push_back(Value);
     LoadChains.push_back(Value.getValue(1));
     SrcOff += VTSize;
@@ -3412,7 +3414,7 @@
 
     Store = DAG.getStore(Chain, dl, LoadValues[i],
                          getMemBasePlusOffset(Dst, DstOff, DAG),
-                         DstSV, DstSVOff + DstOff, false, false, Align);
+                         DstSV, DstSVOff + DstOff, isVol, false, Align);
     OutChains.push_back(Store);
     DstOff += VTSize;
   }
@@ -3424,7 +3426,7 @@
 static SDValue getMemsetStores(SelectionDAG &DAG, DebugLoc dl,
                                SDValue Chain, SDValue Dst,
                                SDValue Src, uint64_t Size,
-                               unsigned Align,
+                               unsigned Align, bool isVol,
                                const Value *DstSV, uint64_t DstSVOff) {
   const TargetLowering &TLI = DAG.getTargetLoweringInfo();
 
@@ -3463,7 +3465,7 @@
     SDValue Value = getMemsetValue(Src, VT, DAG, dl);
     SDValue Store = DAG.getStore(Chain, dl, Value,
                                  getMemBasePlusOffset(Dst, DstOff, DAG),
-                                 DstSV, DstSVOff + DstOff, false, false, 0);
+                                 DstSV, DstSVOff + DstOff, isVol, false, 0);
     OutChains.push_back(Store);
     DstOff += VTSize;
   }
@@ -3474,7 +3476,7 @@
 
 SDValue SelectionDAG::getMemcpy(SDValue Chain, DebugLoc dl, SDValue Dst,
                                 SDValue Src, SDValue Size,
-                                unsigned Align, bool AlwaysInline,
+                                unsigned Align, bool isVol, bool AlwaysInline,
                                 const Value *DstSV, uint64_t DstSVOff,
                                 const Value *SrcSV, uint64_t SrcSVOff) {
 
@@ -3488,7 +3490,7 @@
 
     SDValue Result = getMemcpyLoadsAndStores(*this, dl, Chain, Dst, Src,
                                              ConstantSize->getZExtValue(),Align,
-                                       false, DstSV, DstSVOff, SrcSV, SrcSVOff);
+                                isVol, false, DstSV, DstSVOff, SrcSV, SrcSVOff);
     if (Result.getNode())
       return Result;
   }
@@ -3497,7 +3499,7 @@
   // code. If the target chooses to do this, this is the next best.
   SDValue Result =
     TLI.EmitTargetCodeForMemcpy(*this, dl, Chain, Dst, Src, Size, Align,
-                                AlwaysInline,
+                                isVol, AlwaysInline,
                                 DstSV, DstSVOff, SrcSV, SrcSVOff);
   if (Result.getNode())
     return Result;
@@ -3507,11 +3509,12 @@
   if (AlwaysInline) {
     assert(ConstantSize && "AlwaysInline requires a constant size!");
     return getMemcpyLoadsAndStores(*this, dl, Chain, Dst, Src,
-                                   ConstantSize->getZExtValue(), Align, true,
-                                   DstSV, DstSVOff, SrcSV, SrcSVOff);
+                                   ConstantSize->getZExtValue(), Align, isVol,
+                                   true, DstSV, DstSVOff, SrcSV, SrcSVOff);
   }
 
   // Emit a library call.
+  assert(!isVol && "library memcpy does not support volatile");
   TargetLowering::ArgListTy Args;
   TargetLowering::ArgListEntry Entry;
   Entry.Ty = TLI.getTargetData()->getIntPtrType(*getContext());
@@ -3532,7 +3535,7 @@
 
 SDValue SelectionDAG::getMemmove(SDValue Chain, DebugLoc dl, SDValue Dst,
                                  SDValue Src, SDValue Size,
-                                 unsigned Align,
+                                 unsigned Align, bool isVol,
                                  const Value *DstSV, uint64_t DstSVOff,
                                  const Value *SrcSV, uint64_t SrcSVOff) {
 
@@ -3546,8 +3549,8 @@
 
     SDValue Result =
       getMemmoveLoadsAndStores(*this, dl, Chain, Dst, Src,
-                               ConstantSize->getZExtValue(),
-                               Align, false, DstSV, DstSVOff, SrcSV, SrcSVOff);
+                               ConstantSize->getZExtValue(), Align, isVol,
+                               false, DstSV, DstSVOff, SrcSV, SrcSVOff);
     if (Result.getNode())
       return Result;
   }
@@ -3555,12 +3558,13 @@
   // Then check to see if we should lower the memmove with target-specific
   // code. If the target chooses to do this, this is the next best.
   SDValue Result =
-    TLI.EmitTargetCodeForMemmove(*this, dl, Chain, Dst, Src, Size, Align,
+    TLI.EmitTargetCodeForMemmove(*this, dl, Chain, Dst, Src, Size, Align, isVol,
                                  DstSV, DstSVOff, SrcSV, SrcSVOff);
   if (Result.getNode())
     return Result;
 
   // Emit a library call.
+  assert(!isVol && "library memmove does not support volatile");
   TargetLowering::ArgListTy Args;
   TargetLowering::ArgListEntry Entry;
   Entry.Ty = TLI.getTargetData()->getIntPtrType(*getContext());
@@ -3581,7 +3585,7 @@
 
 SDValue SelectionDAG::getMemset(SDValue Chain, DebugLoc dl, SDValue Dst,
                                 SDValue Src, SDValue Size,
-                                unsigned Align,
+                                unsigned Align, bool isVol,
                                 const Value *DstSV, uint64_t DstSVOff) {
 
   // Check to see if we should lower the memset to stores first.
@@ -3594,7 +3598,7 @@
 
     SDValue Result =
       getMemsetStores(*this, dl, Chain, Dst, Src, ConstantSize->getZExtValue(),
-                      Align, DstSV, DstSVOff);
+                      Align, isVol, DstSV, DstSVOff);
     if (Result.getNode())
       return Result;
   }
@@ -3602,12 +3606,13 @@
   // Then check to see if we should lower the memset with target-specific
   // code. If the target chooses to do this, this is the next best.
   SDValue Result =
-    TLI.EmitTargetCodeForMemset(*this, dl, Chain, Dst, Src, Size, Align,
+    TLI.EmitTargetCodeForMemset(*this, dl, Chain, Dst, Src, Size, Align, isVol,
                                 DstSV, DstSVOff);
   if (Result.getNode())
     return Result;
 
   // Emit a library call.
+  assert(!isVol && "library memset does not support volatile");
   const Type *IntPtrTy = TLI.getTargetData()->getIntPtrType(*getContext());
   TargetLowering::ArgListTy Args;
   TargetLowering::ArgListEntry Entry;
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 922c6e8..fabb7bd 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -3731,28 +3731,50 @@
   case Intrinsic::longjmp:
     return "_longjmp"+!TLI.usesUnderscoreLongJmp();
   case Intrinsic::memcpy: {
+    // Assert for address < 256 since we support only user defined address
+    // spaces.
+    assert(cast<PointerType>(I.getOperand(1)->getType())->getAddressSpace()
+           < 256 &&
+           cast<PointerType>(I.getOperand(2)->getType())->getAddressSpace()
+           < 256 &&
+           "Unknown address space");
     SDValue Op1 = getValue(I.getOperand(1));
     SDValue Op2 = getValue(I.getOperand(2));
     SDValue Op3 = getValue(I.getOperand(3));
     unsigned Align = cast<ConstantInt>(I.getOperand(4))->getZExtValue();
-    DAG.setRoot(DAG.getMemcpy(getRoot(), dl, Op1, Op2, Op3, Align, false,
+    bool isVol = cast<ConstantInt>(I.getOperand(5))->getZExtValue();
+    DAG.setRoot(DAG.getMemcpy(getRoot(), dl, Op1, Op2, Op3, Align, isVol, false,
                               I.getOperand(1), 0, I.getOperand(2), 0));
     return 0;
   }
   case Intrinsic::memset: {
+    // Assert for address < 256 since we support only user defined address
+    // spaces.
+    assert(cast<PointerType>(I.getOperand(1)->getType())->getAddressSpace()
+           < 256 &&
+           "Unknown address space");
     SDValue Op1 = getValue(I.getOperand(1));
     SDValue Op2 = getValue(I.getOperand(2));
     SDValue Op3 = getValue(I.getOperand(3));
     unsigned Align = cast<ConstantInt>(I.getOperand(4))->getZExtValue();
-    DAG.setRoot(DAG.getMemset(getRoot(), dl, Op1, Op2, Op3, Align,
+    bool isVol = cast<ConstantInt>(I.getOperand(5))->getZExtValue();
+    DAG.setRoot(DAG.getMemset(getRoot(), dl, Op1, Op2, Op3, Align, isVol,
                               I.getOperand(1), 0));
     return 0;
   }
   case Intrinsic::memmove: {
+    // Assert for address < 256 since we support only user defined address
+    // spaces.
+    assert(cast<PointerType>(I.getOperand(1)->getType())->getAddressSpace()
+           < 256 &&
+           cast<PointerType>(I.getOperand(2)->getType())->getAddressSpace()
+           < 256 &&
+           "Unknown address space");
     SDValue Op1 = getValue(I.getOperand(1));
     SDValue Op2 = getValue(I.getOperand(2));
     SDValue Op3 = getValue(I.getOperand(3));
     unsigned Align = cast<ConstantInt>(I.getOperand(4))->getZExtValue();
+    bool isVol = cast<ConstantInt>(I.getOperand(5))->getZExtValue();
 
     // If the source and destination are known to not be aliases, we can
     // lower memmove as memcpy.
@@ -3761,12 +3783,12 @@
       Size = C->getZExtValue();
     if (AA->alias(I.getOperand(1), Size, I.getOperand(2), Size) ==
         AliasAnalysis::NoAlias) {
-      DAG.setRoot(DAG.getMemcpy(getRoot(), dl, Op1, Op2, Op3, Align, false,
-                                I.getOperand(1), 0, I.getOperand(2), 0));
+      DAG.setRoot(DAG.getMemcpy(getRoot(), dl, Op1, Op2, Op3, Align, isVol, 
+                                false, I.getOperand(1), 0, I.getOperand(2), 0));
       return 0;
     }
 
-    DAG.setRoot(DAG.getMemmove(getRoot(), dl, Op1, Op2, Op3, Align,
+    DAG.setRoot(DAG.getMemmove(getRoot(), dl, Op1, Op2, Op3, Align, isVol,
                                I.getOperand(1), 0, I.getOperand(2), 0));
     return 0;
   }
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index b6c81f6..77fb0c3 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -861,7 +861,8 @@
                           DebugLoc dl) {
   SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
   return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
-                       /*AlwaysInline=*/false, NULL, 0, NULL, 0);
+                       /*isVolatile=*/false, /*AlwaysInline=*/false,
+                       NULL, 0, NULL, 0);
 }
 
 /// LowerMemOpCallTo - Store the argument to the stack.
@@ -2053,7 +2054,7 @@
                                            SDValue Chain,
                                            SDValue Dst, SDValue Src,
                                            SDValue Size, unsigned Align,
-                                           bool AlwaysInline,
+                                           bool isVolatile, bool AlwaysInline,
                                          const Value *DstSV, uint64_t DstSVOff,
                                          const Value *SrcSV, uint64_t SrcSVOff){
   // Do repeated 4-byte loads and stores. To be improved.
@@ -2089,7 +2090,7 @@
       Loads[i] = DAG.getLoad(VT, dl, Chain,
                              DAG.getNode(ISD::ADD, dl, MVT::i32, Src,
                                          DAG.getConstant(SrcOff, MVT::i32)),
-                             SrcSV, SrcSVOff + SrcOff, false, false, 0);
+                             SrcSV, SrcSVOff + SrcOff, isVolatile, false, 0);
       TFOps[i] = Loads[i].getValue(1);
       SrcOff += VTSize;
     }
@@ -2100,7 +2101,7 @@
       TFOps[i] = DAG.getStore(Chain, dl, Loads[i],
                               DAG.getNode(ISD::ADD, dl, MVT::i32, Dst,
                                           DAG.getConstant(DstOff, MVT::i32)),
-                              DstSV, DstSVOff + DstOff, false, false, 0);
+                              DstSV, DstSVOff + DstOff, isVolatile, false, 0);
       DstOff += VTSize;
     }
     Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &TFOps[0], i);
diff --git a/lib/Target/ARM/ARMISelLowering.h b/lib/Target/ARM/ARMISelLowering.h
index f8f8adc..fa33ad3 100644
--- a/lib/Target/ARM/ARMISelLowering.h
+++ b/lib/Target/ARM/ARMISelLowering.h
@@ -305,7 +305,7 @@
                                       SDValue Chain,
                                       SDValue Dst, SDValue Src,
                                       SDValue Size, unsigned Align,
-                                      bool AlwaysInline,
+                                      bool isVolatile, bool AlwaysInline,
                                       const Value *DstSV, uint64_t DstSVOff,
                                       const Value *SrcSV, uint64_t SrcSVOff);
     SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index e67666d..32a372d 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -2392,7 +2392,7 @@
                           DebugLoc dl) {
   SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
   return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
-                       false, NULL, 0, NULL, 0);
+                       false, false, NULL, 0, NULL, 0);
 }
 
 /// LowerMemOpCallTo - Store the argument to the stack or remember it in case of
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index b24d5a1..5a52ac2 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -1433,7 +1433,8 @@
                           DebugLoc dl) {
   SDValue SizeNode     = DAG.getConstant(Flags.getByValSize(), MVT::i32);
   return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
-                       /*AlwaysInline=*/true, NULL, 0, NULL, 0);
+                       /*isVolatile*/false, /*AlwaysInline=*/true,
+                       NULL, 0, NULL, 0);
 }
 
 /// IsTailCallConvention - Return true if the calling convention is one that
@@ -6550,6 +6551,7 @@
                                            SDValue Chain,
                                            SDValue Dst, SDValue Src,
                                            SDValue Size, unsigned Align,
+                                           bool isVolatile,
                                            const Value *DstSV,
                                            uint64_t DstSVOff) {
   ConstantSDNode *ConstantSize = dyn_cast<ConstantSDNode>(Size);
@@ -6678,7 +6680,7 @@
                                       DAG.getConstant(Offset, AddrVT)),
                           Src,
                           DAG.getConstant(BytesLeft, SizeVT),
-                          Align, DstSV, DstSVOff + Offset);
+                          Align, isVolatile, DstSV, DstSVOff + Offset);
   }
 
   // TODO: Use a Tokenfactor, as in memcpy, instead of a single chain.
@@ -6689,7 +6691,7 @@
 X86TargetLowering::EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
                                       SDValue Chain, SDValue Dst, SDValue Src,
                                       SDValue Size, unsigned Align,
-                                      bool AlwaysInline,
+                                      bool isVolatile, bool AlwaysInline,
                                       const Value *DstSV, uint64_t DstSVOff,
                                       const Value *SrcSV, uint64_t SrcSVOff) {
   // This requires the copy size to be a constant, preferrably
@@ -6748,7 +6750,7 @@
                                     DAG.getNode(ISD::ADD, dl, SrcVT, Src,
                                                 DAG.getConstant(Offset, SrcVT)),
                                     DAG.getConstant(BytesLeft, SizeVT),
-                                    Align, AlwaysInline,
+                                    Align, isVolatile, AlwaysInline,
                                     DstSV, DstSVOff + Offset,
                                     SrcSV, SrcSVOff + Offset));
   }
@@ -6831,8 +6833,8 @@
   DebugLoc dl = Op.getDebugLoc();
 
   return DAG.getMemcpy(Chain, dl, DstPtr, SrcPtr,
-                       DAG.getIntPtrConstant(24), 8, false,
-                       DstSV, 0, SrcSV, 0);
+                       DAG.getIntPtrConstant(24), 8, /*isVolatile*/false,
+                       false, DstSV, 0, SrcSV, 0);
 }
 
 SDValue
diff --git a/lib/Target/X86/X86ISelLowering.h b/lib/Target/X86/X86ISelLowering.h
index 4549cba..6c9a7a5 100644
--- a/lib/Target/X86/X86ISelLowering.h
+++ b/lib/Target/X86/X86ISelLowering.h
@@ -737,12 +737,13 @@
                                     SDValue Chain,
                                     SDValue Dst, SDValue Src,
                                     SDValue Size, unsigned Align,
+                                    bool isVolatile,
                                     const Value *DstSV, uint64_t DstSVOff);
     SDValue EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
                                     SDValue Chain,
                                     SDValue Dst, SDValue Src,
                                     SDValue Size, unsigned Align,
-                                    bool AlwaysInline,
+                                    bool isVolatile, bool AlwaysInline,
                                     const Value *DstSV, uint64_t DstSVOff,
                                     const Value *SrcSV, uint64_t SrcSVOff);
     
@@ -752,7 +753,7 @@
     /// block, the number of args, and whether or not the second arg is
     /// in memory or not.
     MachineBasicBlock *EmitPCMP(MachineInstr *BInstr, MachineBasicBlock *BB,
-				unsigned argNum, bool inMem) const;
+                                unsigned argNum, bool inMem) const;
 
     /// Utility function to emit atomic bitwise operations (and, or, xor).
     /// It takes the bitwise instruction to expand, the associated machine basic
diff --git a/lib/Target/XCore/XCoreISelLowering.cpp b/lib/Target/XCore/XCoreISelLowering.cpp
index bf1a457..27e5233 100644
--- a/lib/Target/XCore/XCoreISelLowering.cpp
+++ b/lib/Target/XCore/XCoreISelLowering.cpp
@@ -1443,7 +1443,7 @@
         return DAG.getMemmove(Chain, dl, ST->getBasePtr(),
                               LD->getBasePtr(),
                               DAG.getConstant(StoreBits/8, MVT::i32),
-                              Alignment, ST->getSrcValue(),
+                              Alignment, false, ST->getSrcValue(),
                               ST->getSrcValueOffset(), LD->getSrcValue(),
                               LD->getSrcValueOffset());
       }
diff --git a/lib/Transforms/InstCombine/InstCombineCalls.cpp b/lib/Transforms/InstCombine/InstCombineCalls.cpp
index 76c815d..e025b05 100644
--- a/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -136,8 +136,14 @@
     return 0;  // If not 1/2/4/8 bytes, exit.
   
   // Use an integer load+store unless we can find something better.
-  Type *NewPtrTy =
-            PointerType::getUnqual(IntegerType::get(MI->getContext(), Size<<3));
+  unsigned SrcAddrSp =
+    cast<PointerType>(MI->getOperand(2)->getType())->getAddressSpace();
+  unsigned DstAddrSp =
+    cast<PointerType>(MI->getOperand(1)->getType())->getAddressSpace();
+
+  const IntegerType* IntType = IntegerType::get(MI->getContext(), Size<<3);
+  Type *NewSrcPtrTy = PointerType::get(IntType, SrcAddrSp);
+  Type *NewDstPtrTy = PointerType::get(IntType, DstAddrSp);
   
   // Memcpy forces the use of i8* for the source and destination.  That means
   // that if you're using memcpy to move one double around, you'll get a cast
@@ -167,8 +173,10 @@
           break;
       }
       
-      if (SrcETy->isSingleValueType())
-        NewPtrTy = PointerType::getUnqual(SrcETy);
+      if (SrcETy->isSingleValueType()) {
+        NewSrcPtrTy = PointerType::get(SrcETy, SrcAddrSp);
+        NewDstPtrTy = PointerType::get(SrcETy, DstAddrSp);
+      }
     }
   }
   
@@ -178,11 +186,12 @@
   SrcAlign = std::max(SrcAlign, CopyAlign);
   DstAlign = std::max(DstAlign, CopyAlign);
   
-  Value *Src = Builder->CreateBitCast(MI->getOperand(2), NewPtrTy);
-  Value *Dest = Builder->CreateBitCast(MI->getOperand(1), NewPtrTy);
-  Instruction *L = new LoadInst(Src, "tmp", false, SrcAlign);
+  Value *Src = Builder->CreateBitCast(MI->getOperand(2), NewSrcPtrTy);
+  Value *Dest = Builder->CreateBitCast(MI->getOperand(1), NewDstPtrTy);
+  Instruction *L = new LoadInst(Src, "tmp", MI->isVolatile(), SrcAlign);
   InsertNewInstBefore(L, *MI);
-  InsertNewInstBefore(new StoreInst(L, Dest, false, DstAlign), *MI);
+  InsertNewInstBefore(new StoreInst(L, Dest, MI->isVolatile(), DstAlign),
+                      *MI);
 
   // Set the size of the copy to 0, it will be deleted on the next iteration.
   MI->setOperand(3, Constant::getNullValue(MemOpLength->getType()));
@@ -275,10 +284,11 @@
         if (GVSrc->isConstant()) {
           Module *M = CI.getParent()->getParent()->getParent();
           Intrinsic::ID MemCpyID = Intrinsic::memcpy;
-          const Type *Tys[1];
-          Tys[0] = CI.getOperand(3)->getType();
+          const Type *Tys[3] = { CI.getOperand(1)->getType(),
+                                 CI.getOperand(2)->getType(),
+                                 CI.getOperand(3)->getType() };
           CI.setOperand(0, 
-                        Intrinsic::getDeclaration(M, MemCpyID, Tys, 1));
+                        Intrinsic::getDeclaration(M, MemCpyID, Tys, 3));
           Changed = true;
         }
     }
diff --git a/lib/Transforms/Scalar/MemCpyOptimizer.cpp b/lib/Transforms/Scalar/MemCpyOptimizer.cpp
index 62e2977..3b305ae 100644
--- a/lib/Transforms/Scalar/MemCpyOptimizer.cpp
+++ b/lib/Transforms/Scalar/MemCpyOptimizer.cpp
@@ -413,7 +413,6 @@
   // interesting as a small compile-time optimization.
   Ranges.addStore(0, SI);
   
-  Function *MemSetF = 0;
   
   // Now that we have full information about ranges, loop over the ranges and
   // emit memset's for anything big enough to be worthwhile.
@@ -433,29 +432,40 @@
     // memset block.  This ensure that the memset is dominated by any addressing
     // instruction needed by the start of the block.
     BasicBlock::iterator InsertPt = BI;
-  
-    if (MemSetF == 0) {
-      const Type *Ty = Type::getInt64Ty(Context);
-      MemSetF = Intrinsic::getDeclaration(M, Intrinsic::memset, &Ty, 1);
-    }
-    
+
     // Get the starting pointer of the block.
     StartPtr = Range.StartPtr;
-  
+
+    // Determine alignment
+    unsigned Alignment = Range.Alignment;
+    if (Alignment == 0) {
+      const Type *EltType = 
+         cast<PointerType>(StartPtr->getType())->getElementType();
+      Alignment = TD->getABITypeAlignment(EltType);
+    }
+
     // Cast the start ptr to be i8* as memset requires.
-    const Type *i8Ptr = Type::getInt8PtrTy(Context);
-    if (StartPtr->getType() != i8Ptr)
+    const PointerType* StartPTy = cast<PointerType>(StartPtr->getType());
+    const PointerType *i8Ptr = Type::getInt8PtrTy(Context,
+                                                  StartPTy->getAddressSpace());
+    if (StartPTy!= i8Ptr)
       StartPtr = new BitCastInst(StartPtr, i8Ptr, StartPtr->getName(),
                                  InsertPt);
-  
+
     Value *Ops[] = {
       StartPtr, ByteVal,   // Start, value
       // size
       ConstantInt::get(Type::getInt64Ty(Context), Range.End-Range.Start),
       // align
-      ConstantInt::get(Type::getInt32Ty(Context), Range.Alignment)
+      ConstantInt::get(Type::getInt32Ty(Context), Alignment),
+      // volatile
+      ConstantInt::get(Type::getInt1Ty(Context), 0),
     };
-    Value *C = CallInst::Create(MemSetF, Ops, Ops+4, "", InsertPt);
+    const Type *Tys[] = { Ops[0]->getType(), Ops[2]->getType() };
+
+    Function *MemSetF = Intrinsic::getDeclaration(M, Intrinsic::memset, Tys, 2);
+
+    Value *C = CallInst::Create(MemSetF, Ops, Ops+5, "", InsertPt);
     DEBUG(dbgs() << "Replace stores:\n";
           for (unsigned i = 0, e = Range.TheStores.size(); i != e; ++i)
             dbgs() << *Range.TheStores[i];
@@ -680,16 +690,19 @@
     return false;
   
   // If all checks passed, then we can transform these memcpy's
-  const Type *Ty = M->getLength()->getType();
+  const Type *ArgTys[3] = { M->getRawDest()->getType(),
+                            MDep->getRawSource()->getType(),
+                            M->getLength()->getType() };
   Function *MemCpyFun = Intrinsic::getDeclaration(
                                  M->getParent()->getParent()->getParent(),
-                                 M->getIntrinsicID(), &Ty, 1);
+                                 M->getIntrinsicID(), ArgTys, 3);
     
-  Value *Args[4] = {
-    M->getRawDest(), MDep->getRawSource(), M->getLength(), M->getAlignmentCst()
+  Value *Args[5] = {
+    M->getRawDest(), MDep->getRawSource(), M->getLength(),
+    M->getAlignmentCst(), M->getVolatileCst()
   };
   
-  CallInst *C = CallInst::Create(MemCpyFun, Args, Args+4, "", M);
+  CallInst *C = CallInst::Create(MemCpyFun, Args, Args+5, "", M);
   
   
   // If C and M don't interfere, then this is a valid transformation.  If they
@@ -728,8 +741,10 @@
   
   // If not, then we know we can transform this.
   Module *Mod = M->getParent()->getParent()->getParent();
-  const Type *Ty = M->getLength()->getType();
-  M->setOperand(0, Intrinsic::getDeclaration(Mod, Intrinsic::memcpy, &Ty, 1));
+  const Type *ArgTys[3] = { M->getRawDest()->getType(),
+                            M->getRawSource()->getType(),
+                            M->getLength()->getType() };
+  M->setOperand(0,Intrinsic::getDeclaration(Mod, Intrinsic::memcpy, ArgTys, 3));
 
   // MemDep may have over conservative information about this instruction, just
   // conservatively flush it from the cache.
diff --git a/lib/Transforms/Scalar/ScalarReplAggregates.cpp b/lib/Transforms/Scalar/ScalarReplAggregates.cpp
index bbe6270..6211beb 100644
--- a/lib/Transforms/Scalar/ScalarReplAggregates.cpp
+++ b/lib/Transforms/Scalar/ScalarReplAggregates.cpp
@@ -858,8 +858,17 @@
       EltPtr = new BitCastInst(EltPtr, BytePtrTy, EltPtr->getName(), MI);
     
     // Cast the other pointer (if we have one) to BytePtrTy. 
-    if (OtherElt && OtherElt->getType() != BytePtrTy)
-      OtherElt = new BitCastInst(OtherElt, BytePtrTy, OtherElt->getName(), MI);
+    if (OtherElt && OtherElt->getType() != BytePtrTy) {
+      // Preserve address space of OtherElt
+      const PointerType* OtherPTy = cast<PointerType>(OtherElt->getType());
+      const PointerType* PTy = cast<PointerType>(BytePtrTy);
+      if (OtherPTy->getElementType() != PTy->getElementType()) {
+        Type *NewOtherPTy = PointerType::get(PTy->getElementType(),
+                                             OtherPTy->getAddressSpace());
+        OtherElt = new BitCastInst(OtherElt, NewOtherPTy,
+                                   OtherElt->getNameStr(), MI);
+      }
+    }
     
     unsigned EltSize = TD->getTypeAllocSize(EltTy);
     
@@ -870,17 +879,28 @@
         SROADest ? OtherElt : EltPtr,  // Src ptr
         ConstantInt::get(MI->getOperand(3)->getType(), EltSize), // Size
         // Align
-        ConstantInt::get(Type::getInt32Ty(MI->getContext()), OtherEltAlign)
+        ConstantInt::get(Type::getInt32Ty(MI->getContext()), OtherEltAlign),
+        MI->getVolatileCst()
       };
-      CallInst::Create(TheFn, Ops, Ops + 4, "", MI);
+      // In case we fold the address space overloaded memcpy of A to B
+      // with memcpy of B to C, change the function to be a memcpy of A to C.
+      const Type *Tys[] = { Ops[0]->getType(), Ops[1]->getType(),
+                            Ops[2]->getType() };
+      Module *M = MI->getParent()->getParent()->getParent();
+      TheFn = Intrinsic::getDeclaration(M, MI->getIntrinsicID(), Tys, 3);
+      CallInst::Create(TheFn, Ops, Ops + 5, "", MI);
     } else {
       assert(isa<MemSetInst>(MI));
       Value *Ops[] = {
         EltPtr, MI->getOperand(2),  // Dest, Value,
         ConstantInt::get(MI->getOperand(3)->getType(), EltSize), // Size
-        Zero  // Align
+        Zero,  // Align
+        ConstantInt::get(Type::getInt1Ty(MI->getContext()), 0) // isVolatile
       };
-      CallInst::Create(TheFn, Ops, Ops + 4, "", MI);
+      const Type *Tys[] = { Ops[0]->getType(), Ops[2]->getType() };
+      Module *M = MI->getParent()->getParent()->getParent();
+      TheFn = Intrinsic::getDeclaration(M, Intrinsic::memset, Tys, 2);
+      CallInst::Create(TheFn, Ops, Ops + 5, "", MI);
     }
   }
   DeadInsts.push_back(MI);
diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
index 5941ea6..b053cfc 100644
--- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp
+++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
@@ -142,7 +142,8 @@
     // We have enough information to now generate the memcpy call to do the
     // concatenation for us.  Make a memcpy to copy the nul byte with align = 1.
     EmitMemCpy(CpyDst, Src,
-               ConstantInt::get(TD->getIntPtrType(*Context), Len+1), 1, B, TD);
+               ConstantInt::get(TD->getIntPtrType(*Context), Len+1),
+                                1, false, B, TD);
   }
 };
 
@@ -383,7 +384,8 @@
                     CI->getOperand(3), B, TD);
     else
       EmitMemCpy(Dst, Src,
-                 ConstantInt::get(TD->getIntPtrType(*Context), Len), 1, B, TD);
+                 ConstantInt::get(TD->getIntPtrType(*Context), Len),
+                                  1, false, B, TD);
     return Dst;
   }
 };
@@ -411,8 +413,8 @@
 
     if (SrcLen == 0) {
       // strncpy(x, "", y) -> memset(x, '\0', y, 1)
-      EmitMemSet(Dst, ConstantInt::get(Type::getInt8Ty(*Context), '\0'), LenOp,
-		             B, TD);
+      EmitMemSet(Dst, ConstantInt::get(Type::getInt8Ty(*Context), '\0'),
+                 LenOp, false, B, TD);
       return Dst;
     }
 
@@ -432,7 +434,8 @@
 
     // strncpy(x, s, c) -> memcpy(x, s, c, 1) [s and c are constant]
     EmitMemCpy(Dst, Src,
-               ConstantInt::get(TD->getIntPtrType(*Context), Len), 1, B, TD);
+               ConstantInt::get(TD->getIntPtrType(*Context), Len),
+                                1, false, B, TD);
 
     return Dst;
   }
@@ -593,7 +596,7 @@
 
     // memcpy(x, y, n) -> llvm.memcpy(x, y, n, 1)
     EmitMemCpy(CI->getOperand(1), CI->getOperand(2),
-               CI->getOperand(3), 1, B, TD);
+               CI->getOperand(3), 1, false, B, TD);
     return CI->getOperand(1);
   }
 };
@@ -615,7 +618,7 @@
 
     // memmove(x, y, n) -> llvm.memmove(x, y, n, 1)
     EmitMemMove(CI->getOperand(1), CI->getOperand(2),
-                CI->getOperand(3), 1, B, TD);
+                CI->getOperand(3), 1, false, B, TD);
     return CI->getOperand(1);
   }
 };
@@ -637,8 +640,8 @@
 
     // memset(p, v, n) -> llvm.memset(p, v, n, 1)
     Value *Val = B.CreateIntCast(CI->getOperand(2), Type::getInt8Ty(*Context),
-				 false);
-    EmitMemSet(CI->getOperand(1), Val,  CI->getOperand(3), B, TD);
+                                 false);
+    EmitMemSet(CI->getOperand(1), Val,  CI->getOperand(3), false, B, TD);
     return CI->getOperand(1);
   }
 };
@@ -999,7 +1002,7 @@
       // sprintf(str, fmt) -> llvm.memcpy(str, fmt, strlen(fmt)+1, 1)
       EmitMemCpy(CI->getOperand(1), CI->getOperand(2), // Copy the nul byte.
                  ConstantInt::get(TD->getIntPtrType(*Context),
-                 FormatStr.size()+1), 1, B, TD);
+                 FormatStr.size()+1), 1, false, B, TD);
       return ConstantInt::get(CI->getType(), FormatStr.size());
     }
 
@@ -1013,11 +1016,11 @@
       // sprintf(dst, "%c", chr) --> *(i8*)dst = chr; *((i8*)dst+1) = 0
       if (!CI->getOperand(3)->getType()->isIntegerTy()) return 0;
       Value *V = B.CreateTrunc(CI->getOperand(3),
-			       Type::getInt8Ty(*Context), "char");
+                               Type::getInt8Ty(*Context), "char");
       Value *Ptr = CastToCStr(CI->getOperand(1), B);
       B.CreateStore(V, Ptr);
       Ptr = B.CreateGEP(Ptr, ConstantInt::get(Type::getInt32Ty(*Context), 1),
-			"nul");
+                        "nul");
       B.CreateStore(Constant::getNullValue(Type::getInt8Ty(*Context)), Ptr);
 
       return ConstantInt::get(CI->getType(), 1);
@@ -1034,7 +1037,7 @@
       Value *IncLen = B.CreateAdd(Len,
                                   ConstantInt::get(Len->getType(), 1),
                                   "leninc");
-      EmitMemCpy(CI->getOperand(1), CI->getOperand(3), IncLen, 1, B, TD);
+      EmitMemCpy(CI->getOperand(1), CI->getOperand(3), IncLen, 1, false, B, TD);
 
       // The sprintf result is the unincremented number of bytes in the string.
       return B.CreateIntCast(Len, CI->getType(), false);
diff --git a/lib/Transforms/Utils/BuildLibCalls.cpp b/lib/Transforms/Utils/BuildLibCalls.cpp
index 0afccf4..fff8179 100644
--- a/lib/Transforms/Utils/BuildLibCalls.cpp
+++ b/lib/Transforms/Utils/BuildLibCalls.cpp
@@ -109,15 +109,16 @@
 
 /// EmitMemCpy - Emit a call to the memcpy function to the builder.  This always
 /// expects that Len has type 'intptr_t' and Dst/Src are pointers.
-Value *llvm::EmitMemCpy(Value *Dst, Value *Src, Value *Len,
-                        unsigned Align, IRBuilder<> &B, const TargetData *TD) {
+Value *llvm::EmitMemCpy(Value *Dst, Value *Src, Value *Len, unsigned Align,
+                        bool isVolatile, IRBuilder<> &B, const TargetData *TD) {
   Module *M = B.GetInsertBlock()->getParent()->getParent();
-  const Type *Ty = Len->getType();
-  Value *MemCpy = Intrinsic::getDeclaration(M, Intrinsic::memcpy, &Ty, 1);
+  const Type *ArgTys[3] = { Dst->getType(), Src->getType(), Len->getType() };
+  Value *MemCpy = Intrinsic::getDeclaration(M, Intrinsic::memcpy, ArgTys, 3);
   Dst = CastToCStr(Dst, B);
   Src = CastToCStr(Src, B);
-  return B.CreateCall4(MemCpy, Dst, Src, Len,
-                       ConstantInt::get(B.getInt32Ty(), Align));
+  return B.CreateCall5(MemCpy, Dst, Src, Len,
+                       ConstantInt::get(B.getInt32Ty(), Align),
+                       ConstantInt::get(B.getInt1Ty(), isVolatile));
 }
 
 /// EmitMemCpyChk - Emit a call to the __memcpy_chk function to the builder.
@@ -146,16 +147,18 @@
 
 /// EmitMemMove - Emit a call to the memmove function to the builder.  This
 /// always expects that the size has type 'intptr_t' and Dst/Src are pointers.
-Value *llvm::EmitMemMove(Value *Dst, Value *Src, Value *Len,
-                         unsigned Align, IRBuilder<> &B, const TargetData *TD) {
+Value *llvm::EmitMemMove(Value *Dst, Value *Src, Value *Len, unsigned Align,
+                         bool isVolatile, IRBuilder<> &B, const TargetData *TD) {
   Module *M = B.GetInsertBlock()->getParent()->getParent();
   LLVMContext &Context = B.GetInsertBlock()->getContext();
-  const Type *Ty = TD->getIntPtrType(Context);
-  Value *MemMove = Intrinsic::getDeclaration(M, Intrinsic::memmove, &Ty, 1);
+  const Type *ArgTys[3] = { Dst->getType(), Src->getType(),
+                            TD->getIntPtrType(Context) };
+  Value *MemMove = Intrinsic::getDeclaration(M, Intrinsic::memmove, ArgTys, 3);
   Dst = CastToCStr(Dst, B);
   Src = CastToCStr(Src, B);
   Value *A = ConstantInt::get(B.getInt32Ty(), Align);
-  return B.CreateCall4(MemMove, Dst, Src, Len, A);
+  Value *Vol = ConstantInt::get(B.getInt1Ty(), isVolatile);
+  return B.CreateCall5(MemMove, Dst, Src, Len, A, Vol);
 }
 
 /// EmitMemChr - Emit a call to the memchr function.  This assumes that Ptr is
@@ -206,15 +209,15 @@
 }
 
 /// EmitMemSet - Emit a call to the memset function
-Value *llvm::EmitMemSet(Value *Dst, Value *Val,
-                        Value *Len, IRBuilder<> &B, const TargetData *TD) {
+Value *llvm::EmitMemSet(Value *Dst, Value *Val, Value *Len, bool isVolatile,
+                        IRBuilder<> &B, const TargetData *TD) {
  Module *M = B.GetInsertBlock()->getParent()->getParent();
  Intrinsic::ID IID = Intrinsic::memset;
- const Type *Tys[1];
- Tys[0] = Len->getType();
- Value *MemSet = Intrinsic::getDeclaration(M, IID, Tys, 1);
+ const Type *Tys[2] = { Dst->getType(), Len->getType() };
+ Value *MemSet = Intrinsic::getDeclaration(M, IID, Tys, 2);
  Value *Align = ConstantInt::get(B.getInt32Ty(), 1);
- return B.CreateCall4(MemSet, CastToCStr(Dst, B), Val, Len, Align);
+ Value *Vol = ConstantInt::get(B.getInt1Ty(), isVolatile);
+ return B.CreateCall5(MemSet, CastToCStr(Dst, B), Val, Len, Align, Vol);
 }
 
 /// EmitUnaryFloatFnCall - Emit a call to the unary function named 'Name' (e.g.
@@ -381,7 +384,7 @@
   if (Name == "__memcpy_chk") {
     if (isFoldable(4, 3, false)) {
       EmitMemCpy(CI->getOperand(1), CI->getOperand(2), CI->getOperand(3),
-                 1, B, TD);
+                 1, false, B, TD);
       replaceCall(CI->getOperand(1));
       return true;
     }
@@ -396,7 +399,7 @@
   if (Name == "__memmove_chk") {
     if (isFoldable(4, 3, false)) {
       EmitMemMove(CI->getOperand(1), CI->getOperand(2), CI->getOperand(3),
-                  1, B, TD);
+                  1, false, B, TD);
       replaceCall(CI->getOperand(1));
       return true;
     }
@@ -407,7 +410,7 @@
     if (isFoldable(4, 3, false)) {
       Value *Val = B.CreateIntCast(CI->getOperand(2), B.getInt8Ty(),
                                    false);
-      EmitMemSet(CI->getOperand(1), Val,  CI->getOperand(3), B, TD);
+      EmitMemSet(CI->getOperand(1), Val,  CI->getOperand(3), false, B, TD);
       replaceCall(CI->getOperand(1));
       return true;
     }
diff --git a/lib/Transforms/Utils/InlineFunction.cpp b/lib/Transforms/Utils/InlineFunction.cpp
index 17f8827..75c9ccd 100644
--- a/lib/Transforms/Utils/InlineFunction.cpp
+++ b/lib/Transforms/Utils/InlineFunction.cpp
@@ -297,10 +297,10 @@
                                           I->getName(), 
                                           &*Caller->begin()->begin());
         // Emit a memcpy.
-        const Type *Tys[] = { Type::getInt64Ty(Context) };
+        const Type *Tys[3] = {VoidPtrTy, VoidPtrTy, Type::getInt64Ty(Context)};
         Function *MemCpyFn = Intrinsic::getDeclaration(Caller->getParent(),
                                                        Intrinsic::memcpy, 
-                                                       Tys, 1);
+                                                       Tys, 3);
         Value *DestCast = new BitCastInst(NewAlloca, VoidPtrTy, "tmp", TheCall);
         Value *SrcCast = new BitCastInst(*AI, VoidPtrTy, "tmp", TheCall);
 
@@ -309,17 +309,18 @@
           Size = ConstantExpr::getSizeOf(AggTy);
         else
           Size = ConstantInt::get(Type::getInt64Ty(Context),
-                                         TD->getTypeStoreSize(AggTy));
+                                  TD->getTypeStoreSize(AggTy));
 
         // Always generate a memcpy of alignment 1 here because we don't know
         // the alignment of the src pointer.  Other optimizations can infer
         // better alignment.
         Value *CallArgs[] = {
           DestCast, SrcCast, Size,
-          ConstantInt::get(Type::getInt32Ty(Context), 1)
+          ConstantInt::get(Type::getInt32Ty(Context), 1),
+          ConstantInt::get(Type::getInt1Ty(Context), 0)
         };
         CallInst *TheMemCpy =
-          CallInst::Create(MemCpyFn, CallArgs, CallArgs+4, "", TheCall);
+          CallInst::Create(MemCpyFn, CallArgs, CallArgs+5, "", TheCall);
 
         // If we have a call graph, update it.
         if (CG) {
diff --git a/lib/VMCore/AutoUpgrade.cpp b/lib/VMCore/AutoUpgrade.cpp
index b9aa5c3..4d06b66 100644
--- a/lib/VMCore/AutoUpgrade.cpp
+++ b/lib/VMCore/AutoUpgrade.cpp
@@ -145,6 +145,54 @@
     }
     break;
 
+  case 'm': {
+    // This upgrades the llvm.memcpy, llvm.memmove, and llvm.memset to the
+    // new format that allows overloading the pointer for different address
+    // space (e.g., llvm.memcpy.i16 => llvm.memcpy.p0i8.p0i8.i16)
+    const char* NewFnName = NULL;
+    if (Name.compare(5,8,"memcpy.i",8) == 0) {
+      if (Name[13] == '8')
+        NewFnName = "llvm.memcpy.p0i8.p0i8.i8";
+      else if (Name.compare(13,2,"16") == 0)
+        NewFnName = "llvm.memcpy.p0i8.p0i8.i16";
+      else if (Name.compare(13,2,"32") == 0)
+        NewFnName = "llvm.memcpy.p0i8.p0i8.i32";
+      else if (Name.compare(13,2,"64") == 0)
+        NewFnName = "llvm.memcpy.p0i8.p0i8.i64";
+    } else if (Name.compare(5,9,"memmove.i",9) == 0) {
+      if (Name[14] == '8')
+        NewFnName = "llvm.memmove.p0i8.p0i8.i8";
+      else if (Name.compare(14,2,"16") == 0)
+        NewFnName = "llvm.memmove.p0i8.p0i8.i16";
+      else if (Name.compare(14,2,"32") == 0)
+        NewFnName = "llvm.memmove.p0i8.p0i8.i32";
+      else if (Name.compare(14,2,"64") == 0)
+        NewFnName = "llvm.memmove.p0i8.p0i8.i64";
+    }
+    else if (Name.compare(5,8,"memset.i",8) == 0) {
+      if (Name[13] == '8')
+        NewFnName = "llvm.memset.p0i8.i8";
+      else if (Name.compare(13,2,"16") == 0)
+        NewFnName = "llvm.memset.p0i8.i16";
+      else if (Name.compare(13,2,"32") == 0)
+        NewFnName = "llvm.memset.p0i8.i32";
+      else if (Name.compare(13,2,"64") == 0)
+        NewFnName = "llvm.memset.p0i8.i64";
+    }
+    if (NewFnName) {
+      const FunctionType *FTy = F->getFunctionType();
+      NewFn = cast<Function>(M->getOrInsertFunction(NewFnName, 
+                                            FTy->getReturnType(),
+                                            FTy->getParamType(0),
+                                            FTy->getParamType(1),
+                                            FTy->getParamType(2),
+                                            FTy->getParamType(3),
+                                            Type::getInt1Ty(F->getContext()),
+                                            (Type *)0));
+      return true;
+    }
+    break;
+  }
   case 'p':
     //  This upgrades the llvm.part.select overloaded intrinsic names to only 
     //  use one type specifier in the name. We only care about the old format
@@ -472,6 +520,28 @@
     CI->eraseFromParent();
   }
   break;
+  case Intrinsic::memcpy:
+  case Intrinsic::memmove:
+  case Intrinsic::memset: {
+    // Add isVolatile
+    const llvm::Type *I1Ty = llvm::Type::getInt1Ty(CI->getContext());
+    Value *Operands[5] = { CI->getOperand(1), CI->getOperand(2),
+                           CI->getOperand(3), CI->getOperand(4),
+                           llvm::ConstantInt::get(I1Ty, 0) };
+    CallInst *NewCI = CallInst::Create(NewFn, Operands, Operands+5,
+                                       CI->getName(), CI);
+    NewCI->setTailCall(CI->isTailCall());
+    NewCI->setCallingConv(CI->getCallingConv());
+    //  Handle any uses of the old CallInst.
+    if (!CI->use_empty())
+      //  Replace all uses of the old call with the new cast which has the 
+      //  correct type.
+      CI->replaceAllUsesWith(NewCI);
+    
+    //  Clean up the old call now that it has been completely upgraded.
+    CI->eraseFromParent();
+    break;
+  }
   }
 }