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diff --git a/include/llvm/Target/TargetCallingConv.td b/include/llvm/Target/TargetCallingConv.td
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+++ b/include/llvm/Target/TargetCallingConv.td
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+//===- TargetCallingConv.td - Target Calling Conventions ---*- tablegen -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file defines the target-independent interfaces with which targets
+// describe their calling conventions.
+//
+//===----------------------------------------------------------------------===//
+
+class CCAction;
+class CallingConv;
+
+/// CCPredicateAction - Instances of this class check some predicate, then
+/// delegate to another action if the predicate is true.
+class CCPredicateAction<CCAction A> : CCAction {
+  CCAction SubAction = A;
+}
+
+/// CCIfType - If the current argument is one of the specified types, apply
+/// Action A.
+class CCIfType<list<ValueType> vts, CCAction A> : CCPredicateAction<A> {
+  list<ValueType> VTs = vts;
+}
+
+/// CCIf - If the predicate matches, apply A.
+class CCIf<string predicate, CCAction A> : CCPredicateAction<A> {
+  string Predicate = predicate;
+}
+
+/// CCIfByVal - If the current argument has ByVal parameter attribute, apply
+/// Action A.
+class CCIfByVal<CCAction A> : CCIf<"ArgFlags.isByVal()", A> {
+}
+
+/// CCIfCC - Match of the current calling convention is 'CC'.
+class CCIfCC<string CC, CCAction A>
+  : CCIf<!strconcat("State.getCallingConv() == ", CC), A> {}
+
+/// CCIfInReg - If this argument is marked with the 'inreg' attribute, apply
+/// the specified action.
+class CCIfInReg<CCAction A> : CCIf<"ArgFlags.isInReg()", A> {}
+
+/// CCIfNest - If this argument is marked with the 'nest' attribute, apply
+/// the specified action.
+class CCIfNest<CCAction A> : CCIf<"ArgFlags.isNest()", A> {}
+
+/// CCIfNotVarArg - If the current function is not vararg - apply the action
+class CCIfNotVarArg<CCAction A> : CCIf<"!State.isVarArg()", A> {}
+
+/// CCAssignToReg - This action matches if there is a register in the specified
+/// list that is still available.  If so, it assigns the value to the first
+/// available register and succeeds.
+class CCAssignToReg<list<Register> regList> : CCAction {
+  list<Register> RegList = regList;
+}
+
+/// CCAssignToRegWithShadow - Same as CCAssignToReg, but with list of registers
+/// which became shadowed, when some register is used.
+class CCAssignToRegWithShadow<list<Register> regList,
+                              list<Register> shadowList> : CCAction {
+  list<Register> RegList = regList;
+  list<Register> ShadowRegList = shadowList;
+}
+
+/// CCAssignToStack - This action always matches: it assigns the value to a
+/// stack slot of the specified size and alignment on the stack.  If size is
+/// zero then the ABI size is used; if align is zero then the ABI alignment
+/// is used - these may depend on the target or subtarget.
+class CCAssignToStack<int size, int align> : CCAction {
+  int Size = size;
+  int Align = align;
+}
+
+/// CCPassByVal - This action always matches: it assigns the value to a stack
+/// slot to implement ByVal aggregate parameter passing. Size and alignment
+/// specify the minimum size and alignment for the stack slot.
+class CCPassByVal<int size, int align> : CCAction {
+  int Size = size;
+  int Align = align;
+}
+
+/// CCPromoteToType - If applied, this promotes the specified current value to
+/// the specified type.
+class CCPromoteToType<ValueType destTy> : CCAction {
+  ValueType DestTy = destTy;
+}
+
+/// CCDelegateTo - This action invokes the specified sub-calling-convention.  It
+/// is successful if the specified CC matches.
+class CCDelegateTo<CallingConv cc> : CCAction {
+  CallingConv CC = cc;
+}
+
+/// CallingConv - An instance of this is used to define each calling convention
+/// that the target supports.
+class CallingConv<list<CCAction> actions> {
+  list<CCAction> Actions = actions;
+}