diff --git a/lib/AsmParser/LLLexer.cpp b/lib/AsmParser/LLLexer.cpp
index 51e63a8..16f4e15 100644
--- a/lib/AsmParser/LLLexer.cpp
+++ b/lib/AsmParser/LLLexer.cpp
@@ -483,7 +483,6 @@
   KEYWORD("coldcc", COLDCC_TOK);
   KEYWORD("x86_stdcallcc", X86_STDCALLCC_TOK);
   KEYWORD("x86_fastcallcc", X86_FASTCALLCC_TOK);
-  KEYWORD("x86_ssecallcc", X86_SSECALLCC_TOK);
 
   KEYWORD("signext", SIGNEXT);
   KEYWORD("zeroext", ZEROEXT);
diff --git a/lib/AsmParser/llvmAsmParser.y b/lib/AsmParser/llvmAsmParser.y
index 2e08040..0ea2ee0 100644
--- a/lib/AsmParser/llvmAsmParser.y
+++ b/lib/AsmParser/llvmAsmParser.y
@@ -1085,7 +1085,6 @@
 %token OPAQUE EXTERNAL TARGET TRIPLE ALIGN ADDRSPACE
 %token DEPLIBS CALL TAIL ASM_TOK MODULE SIDEEFFECT
 %token CC_TOK CCC_TOK FASTCC_TOK COLDCC_TOK X86_STDCALLCC_TOK X86_FASTCALLCC_TOK
-%token X86_SSECALLCC_TOK
 %token DATALAYOUT
 %type <UIntVal> OptCallingConv LocalNumber
 %type <Attributes> OptAttributes Attribute
@@ -1252,7 +1251,6 @@
                  COLDCC_TOK         { $$ = CallingConv::Cold; } |
                  X86_STDCALLCC_TOK  { $$ = CallingConv::X86_StdCall; } |
                  X86_FASTCALLCC_TOK { $$ = CallingConv::X86_FastCall; } |
-                 X86_SSECALLCC_TOK  { $$ = CallingConv::X86_SSECall; } |
                  CC_TOK EUINT64VAL  {
                    if ((unsigned)$2 != $2)
                      GEN_ERROR("Calling conv too large");
diff --git a/lib/CodeGen/SelectionDAG/CallingConvLower.cpp b/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
index a6f52dd..c007779 100644
--- a/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
+++ b/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
@@ -126,7 +126,10 @@
 void CCState::AnalyzeCallResult(CallSDNode *TheCall, CCAssignFn Fn) {
   for (unsigned i = 0, e = TheCall->getNumRetVals(); i != e; ++i) {
     MVT VT = TheCall->getRetValType(i);
-    if (Fn(i, VT, VT, CCValAssign::Full, ISD::ArgFlagsTy(), *this)) {
+    ISD::ArgFlagsTy Flags = ISD::ArgFlagsTy();
+    if (TheCall->isInreg())
+      Flags.setInReg();
+    if (Fn(i, VT, VT, CCValAssign::Full, Flags, *this)) {
       cerr << "Call result #" << i << " has unhandled type "
            << VT.getMVTString() << "\n";
       abort();
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 75dd644..e8f32db 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -3979,7 +3979,7 @@
       TargetLowering::ArgListTy Args;
       std::pair<SDValue,SDValue> CallResult =
         TLI.LowerCallTo(Tmp1, Type::VoidTy,
-                        false, false, false, CallingConv::C, false,
+                        false, false, false, false, CallingConv::C, false,
                         DAG.getExternalSymbol("abort", TLI.getPointerTy()),
                         Args, DAG);
       Result = CallResult.second;
@@ -5302,8 +5302,8 @@
   // Splice the libcall in wherever FindInputOutputChains tells us to.
   const Type *RetTy = Node->getValueType(0).getTypeForMVT();
   std::pair<SDValue,SDValue> CallInfo =
-    TLI.LowerCallTo(InChain, RetTy, isSigned, !isSigned, false, CallingConv::C,
-                    false, Callee, Args, DAG);
+    TLI.LowerCallTo(InChain, RetTy, isSigned, !isSigned, false, false,
+                    CallingConv::C, false, Callee, Args, DAG);
 
   // Legalize the call sequence, starting with the chain.  This will advance
   // the LastCALLSEQ_END to the legalized version of the CALLSEQ_END node that
diff --git a/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
index 640392f..55acc82 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
@@ -629,7 +629,7 @@
   const Type *RetTy = RetVT.getTypeForMVT();
   std::pair<SDValue,SDValue> CallInfo =
     TLI.LowerCallTo(DAG.getEntryNode(), RetTy, isSigned, !isSigned, false,
-                    CallingConv::C, false, Callee, Args, DAG);
+                    false, CallingConv::C, false, Callee, Args, DAG);
   return CallInfo.first;
 }
 
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index dc108f6..4c4a90a 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -3114,7 +3114,7 @@
   Entry.Node = Size; Args.push_back(Entry);
   std::pair<SDValue,SDValue> CallResult =
     TLI.LowerCallTo(Chain, Type::VoidTy,
-                    false, false, false, CallingConv::C, false,
+                    false, false, false, false, CallingConv::C, false,
                     getExternalSymbol("memcpy", TLI.getPointerTy()),
                     Args, *this);
   return CallResult.second;
@@ -3159,7 +3159,7 @@
   Entry.Node = Size; Args.push_back(Entry);
   std::pair<SDValue,SDValue> CallResult =
     TLI.LowerCallTo(Chain, Type::VoidTy,
-                    false, false, false, CallingConv::C, false,
+                    false, false, false, false, CallingConv::C, false,
                     getExternalSymbol("memmove", TLI.getPointerTy()),
                     Args, *this);
   return CallResult.second;
@@ -3210,7 +3210,7 @@
   Args.push_back(Entry);
   std::pair<SDValue,SDValue> CallResult =
     TLI.LowerCallTo(Chain, Type::VoidTy,
-                    false, false, false, CallingConv::C, false,
+                    false, false, false, false, CallingConv::C, false,
                     getExternalSymbol("memset", TLI.getPointerTy()),
                     Args, *this);
   return CallResult.second;
@@ -3329,7 +3329,7 @@
 
 SDValue
 SelectionDAG::getCall(unsigned CallingConv, bool IsVarArgs, bool IsTailCall,
-                      SDVTList VTs,
+                      bool IsInreg, SDVTList VTs,
                       const SDValue *Operands, unsigned NumOperands) {
   // Do not include isTailCall in the folding set profile.
   FoldingSetNodeID ID;
@@ -3345,7 +3345,7 @@
     return SDValue(E, 0);
   }
   SDNode *N = NodeAllocator.Allocate<CallSDNode>();
-  new (N) CallSDNode(CallingConv, IsVarArgs, IsTailCall,
+  new (N) CallSDNode(CallingConv, IsVarArgs, IsTailCall, IsInreg,
                      VTs, Operands, NumOperands);
   CSEMap.InsertNode(N, IP);
   AllNodes.push_back(N);
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index dc9d654..7690250 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -4123,8 +4123,9 @@
   std::pair<SDValue,SDValue> Result =
     TLI.LowerCallTo(getRoot(), CS.getType(),
                     CS.paramHasAttr(0, Attribute::SExt),
-                    CS.paramHasAttr(0, Attribute::ZExt),
-                    FTy->isVarArg(), CS.getCallingConv(),
+                    CS.paramHasAttr(0, Attribute::ZExt), FTy->isVarArg(),
+                    CS.paramHasAttr(0, Attribute::InReg),
+                    CS.getCallingConv(),
                     IsTailCall && PerformTailCallOpt,
                     Callee, Args, DAG);
   if (CS.getType() != Type::VoidTy)
@@ -5050,8 +5051,9 @@
   Args.push_back(Entry);
 
   std::pair<SDValue,SDValue> Result =
-    TLI.LowerCallTo(getRoot(), I.getType(), false, false, false, CallingConv::C,
-                    PerformTailCallOpt, DAG.getExternalSymbol("malloc", IntPtr),
+    TLI.LowerCallTo(getRoot(), I.getType(), false, false, false, false,
+                    CallingConv::C, PerformTailCallOpt, 
+                    DAG.getExternalSymbol("malloc", IntPtr),
                     Args, DAG);
   setValue(&I, Result.first);  // Pointers always fit in registers
   DAG.setRoot(Result.second);
@@ -5065,7 +5067,7 @@
   Args.push_back(Entry);
   MVT IntPtr = TLI.getPointerTy();
   std::pair<SDValue,SDValue> Result =
-    TLI.LowerCallTo(getRoot(), Type::VoidTy, false, false, false,
+    TLI.LowerCallTo(getRoot(), Type::VoidTy, false, false, false, false,
                     CallingConv::C, PerformTailCallOpt,
                     DAG.getExternalSymbol("free", IntPtr), Args, DAG);
   DAG.setRoot(Result.second);
@@ -5234,6 +5236,7 @@
 std::pair<SDValue, SDValue>
 TargetLowering::LowerCallTo(SDValue Chain, const Type *RetTy,
                             bool RetSExt, bool RetZExt, bool isVarArg,
+                            bool isInreg,
                             unsigned CallingConv, bool isTailCall,
                             SDValue Callee,
                             ArgListTy &Args, SelectionDAG &DAG) {
@@ -5326,10 +5329,11 @@
   LoweredRetTys.push_back(MVT::Other);  // Always has a chain.
   
   // Create the CALL node.
-  SDValue Res = DAG.getCall(CallingConv, isVarArg, isTailCall,
+  SDValue Res = DAG.getCall(CallingConv, isVarArg, isTailCall, isInreg,
                             DAG.getVTList(&LoweredRetTys[0],
                                           LoweredRetTys.size()),
-                            &Ops[0], Ops.size());
+                            &Ops[0], Ops.size()
+                            );
   Chain = Res.getValue(LoweredRetTys.size() - 1);
 
   // Gather up the call result into a single value.
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index e859a84..31861e6 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -748,7 +748,7 @@
   Entry.Ty = (const Type *) Type::Int32Ty;
   Args.push_back(Entry);
   std::pair<SDValue, SDValue> CallResult =
-    LowerCallTo(Chain, (const Type *) Type::Int32Ty, false, false, false,
+    LowerCallTo(Chain, (const Type *) Type::Int32Ty, false, false, false, false,
                 CallingConv::C, false,
                 DAG.getExternalSymbol("__tls_get_addr", PtrVT), Args, DAG);
   return CallResult.first;
diff --git a/lib/Target/Alpha/AlphaISelLowering.cpp b/lib/Target/Alpha/AlphaISelLowering.cpp
index ec6932f..a6598a2 100644
--- a/lib/Target/Alpha/AlphaISelLowering.cpp
+++ b/lib/Target/Alpha/AlphaISelLowering.cpp
@@ -318,9 +318,9 @@
 std::pair<SDValue, SDValue>
 AlphaTargetLowering::LowerCallTo(SDValue Chain, const Type *RetTy, 
                                  bool RetSExt, bool RetZExt, bool isVarArg,
-                                 unsigned CallingConv, bool isTailCall,
-                                 SDValue Callee, ArgListTy &Args,
-                                 SelectionDAG &DAG) {
+                                 bool isInreg, unsigned CallingConv, 
+                                 bool isTailCall, SDValue Callee, 
+                                 ArgListTy &Args, SelectionDAG &DAG) {
   int NumBytes = 0;
   if (Args.size() > 6)
     NumBytes = (Args.size() - 6) * 8;
diff --git a/lib/Target/Alpha/AlphaISelLowering.h b/lib/Target/Alpha/AlphaISelLowering.h
index 6a81962..0a78997 100644
--- a/lib/Target/Alpha/AlphaISelLowering.h
+++ b/lib/Target/Alpha/AlphaISelLowering.h
@@ -81,8 +81,8 @@
     /// actual call.
     virtual std::pair<SDValue, SDValue>
     LowerCallTo(SDValue Chain, const Type *RetTy, bool RetSExt, bool RetZExt,
-                bool isVarArg, unsigned CC, bool isTailCall, SDValue Callee, 
-                ArgListTy &Args, SelectionDAG &DAG);
+                bool isVarArg, bool isInreg, unsigned CC, bool isTailCall, 
+                SDValue Callee, ArgListTy &Args, SelectionDAG &DAG);
 
     ConstraintType getConstraintType(const std::string &Constraint) const;
 
diff --git a/lib/Target/IA64/IA64ISelLowering.cpp b/lib/Target/IA64/IA64ISelLowering.cpp
index 9cd9ef0..a440075 100644
--- a/lib/Target/IA64/IA64ISelLowering.cpp
+++ b/lib/Target/IA64/IA64ISelLowering.cpp
@@ -304,8 +304,8 @@
 
 std::pair<SDValue, SDValue>
 IA64TargetLowering::LowerCallTo(SDValue Chain, const Type *RetTy,
-                                bool RetSExt, bool RetZExt,
-                                bool isVarArg, unsigned CallingConv, 
+                                bool RetSExt, bool RetZExt, bool isVarArg,
+                                bool isInreg, unsigned CallingConv, 
                                 bool isTailCall, SDValue Callee, 
                                 ArgListTy &Args, SelectionDAG &DAG) {
 
diff --git a/lib/Target/IA64/IA64ISelLowering.h b/lib/Target/IA64/IA64ISelLowering.h
index bce7ce7..b8b876c 100644
--- a/lib/Target/IA64/IA64ISelLowering.h
+++ b/lib/Target/IA64/IA64ISelLowering.h
@@ -60,7 +60,7 @@
     /// actual call.
     virtual std::pair<SDValue, SDValue>
       LowerCallTo(SDValue Chain, const Type *RetTy,
-                  bool RetSExt, bool RetZExt, bool isVarArg,
+                  bool RetSExt, bool RetZExt, bool isVarArg, bool isInreg,
                   unsigned CC, bool isTailCall, 
                   SDValue Callee, ArgListTy &Args, SelectionDAG &DAG);
 
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 30beb93..ee6fb6e 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -1240,7 +1240,7 @@
   // Lower to a call to __trampoline_setup(Trmp, TrampSize, FPtr, ctx_reg)
   std::pair<SDValue, SDValue> CallResult =
     LowerCallTo(Chain, Op.getValueType().getTypeForMVT(), false, false,
-                false, CallingConv::C, false,
+                false, false, CallingConv::C, false,
                 DAG.getExternalSymbol("__trampoline_setup", PtrVT),
                 Args, DAG);
 
diff --git a/lib/Target/X86/X86CallingConv.td b/lib/Target/X86/X86CallingConv.td
index 590bc10..c5aef19 100644
--- a/lib/Target/X86/X86CallingConv.td
+++ b/lib/Target/X86/X86CallingConv.td
@@ -65,15 +65,6 @@
   CCDelegateTo<RetCC_X86Common>
 ]>;
 
-// X86-32 SSEregparm return-value convention.
-def RetCC_X86_32_SSE : CallingConv<[
-  // The X86-32 sseregparm calling convention returns FP values in XMM0 if the
-  // target has SSE2, otherwise it is the C calling convention.
-  CCIfType<[f32], CCIfSubtarget<"hasSSE2()", CCAssignToReg<[XMM0, XMM1]>>>,
-  CCIfType<[f64], CCIfSubtarget<"hasSSE2()", CCAssignToReg<[XMM0, XMM1]>>>,
-  CCDelegateTo<RetCC_X86Common>
-]>;
-
 // X86-64 C return-value convention.
 def RetCC_X86_64_C : CallingConv<[
   // The X86-64 calling convention always returns FP values in XMM0.
@@ -103,8 +94,6 @@
 def RetCC_X86_32 : CallingConv<[
   // If FastCC, use RetCC_X86_32_Fast.
   CCIfCC<"CallingConv::Fast", CCDelegateTo<RetCC_X86_32_Fast>>,
-  // If SSECC, use RetCC_X86_32_SSE.
-  CCIfCC<"CallingConv::X86_SSECall", CCDelegateTo<RetCC_X86_32_SSE>>,
   // Otherwise, use RetCC_X86_32_C.
   CCDelegateTo<RetCC_X86_32_C>
 ]>;
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 8b5104f..267be34 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -5157,9 +5157,9 @@
       Entry.Node = Size;
       Args.push_back(Entry);
       std::pair<SDValue,SDValue> CallResult =
-        LowerCallTo(Chain, Type::VoidTy, false, false, false, CallingConv::C,
-                    false, DAG.getExternalSymbol(bzeroEntry, IntPtr),
-                    Args, DAG);
+        LowerCallTo(Chain, Type::VoidTy, false, false, false, false, 
+                    CallingConv::C, false, 
+                    DAG.getExternalSymbol(bzeroEntry, IntPtr), Args, DAG);
       return CallResult.second;
     }
 
diff --git a/lib/VMCore/AsmWriter.cpp b/lib/VMCore/AsmWriter.cpp
index 365369b..5ebf31c 100644
--- a/lib/VMCore/AsmWriter.cpp
+++ b/lib/VMCore/AsmWriter.cpp
@@ -1351,7 +1351,6 @@
   case CallingConv::Cold:         Out << "coldcc "; break;
   case CallingConv::X86_StdCall:  Out << "x86_stdcallcc "; break;
   case CallingConv::X86_FastCall: Out << "x86_fastcallcc "; break; 
-  case CallingConv::X86_SSECall:  Out << "x86_ssecallcc "; break;
   default: Out << "cc" << F->getCallingConv() << " "; break;
   }
 
@@ -1635,7 +1634,6 @@
     case CallingConv::Cold:  Out << " coldcc"; break;
     case CallingConv::X86_StdCall:  Out << " x86_stdcallcc"; break;
     case CallingConv::X86_FastCall: Out << " x86_fastcallcc"; break; 
-    case CallingConv::X86_SSECall: Out << " x86_ssecallcc"; break; 
     default: Out << " cc" << CI->getCallingConv(); break;
     }
 
@@ -1680,7 +1678,6 @@
     case CallingConv::Cold:  Out << " coldcc"; break;
     case CallingConv::X86_StdCall:  Out << " x86_stdcallcc"; break;
     case CallingConv::X86_FastCall: Out << " x86_fastcallcc"; break;
-    case CallingConv::X86_SSECall: Out << " x86_ssecallcc"; break;
     default: Out << " cc" << II->getCallingConv(); break;
     }