diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index efe66d1981e..36833840afc 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -1696,13 +1696,11 @@ X86TargetLowering::LowerFormalArguments(SDValue Chain,
   // Some CCs need callee pop.
   if (IsCalleePop(isVarArg, CallConv)) {
     BytesToPopOnReturn  = StackSize; // Callee pops everything.
-    BytesCallerReserves = 0;
   } else {
     BytesToPopOnReturn  = 0; // Callee pops nothing.
     // If this is an sret function, the return should pop the hidden pointer.
     if (!Is64Bit && CallConv != CallingConv::Fast && ArgsAreStructReturn(Ins))
       BytesToPopOnReturn = 4;
-    BytesCallerReserves = StackSize;
   }
 
   if (!Is64Bit) {
diff --git a/lib/Target/X86/X86ISelLowering.h b/lib/Target/X86/X86ISelLowering.h
index 6fd00d6ca2f..0c83ffb9ca9 100644
--- a/lib/Target/X86/X86ISelLowering.h
+++ b/lib/Target/X86/X86ISelLowering.h
@@ -376,7 +376,6 @@ namespace llvm {
     unsigned VarArgsGPOffset;         // X86-64 vararg func int reg offset.
     unsigned VarArgsFPOffset;         // X86-64 vararg func fp reg offset.
     int BytesToPopOnReturn;           // Number of arg bytes ret should pop.
-    int BytesCallerReserves;          // Number of arg bytes caller makes.
 
   public:
     explicit X86TargetLowering(X86TargetMachine &TM);
@@ -404,10 +403,6 @@ namespace llvm {
     //
     unsigned getBytesToPopOnReturn() const { return BytesToPopOnReturn; }
 
-    // Return the number of bytes that the caller reserves for arguments passed
-    // to this function.
-    unsigned getBytesCallerReserves() const { return BytesCallerReserves; }
- 
     /// getStackPtrReg - Return the stack pointer register we are using: either
     /// ESP or RSP.
     unsigned getStackPtrReg() const { return X86StackPtr; }