//=- TriCoreCallingConv.td - Calling Conventions for TriCore -*- tablegen -*-=//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// This describes the calling conventions for TriCore architecture.
//===----------------------------------------------------------------------===//

//===----------------------------------------------------------------------===//
// CCDelegate implemented form TriCore LLVM Thesis
//===----------------------------------------------------------------------===//
//def CC_TriCore_StackModel : CallingConv<[
//CCAssignToStack<4, 4>
//]>;

//===----------------------------------------------------------------------===//
// TriCore Return Value Calling Convention
//===----------------------------------------------------------------------===//
def RetCC_TriCore : CallingConv<[
  // Promote i8/i16 arguments to i32.
  CCIfType<[i8, i16], CCPromoteToType<i32>>,
  
  // i32 are returned in registers D2
  CCIfType<[i32], CCAssignToReg<[D2]>>,

  // Integer values get stored in stack slots that are 4 bytes in
  // size and 4-byte aligned.
  CCIfType<[i32], CCAssignToStack<4, 4>>
]>;

//===----------------------------------------------------------------------===//
// TriCore Argument Calling Conventions
//===----------------------------------------------------------------------===//
def CC_TriCore : CallingConv<[
  // Promote i8/i16 arguments to i32.
  CCIfType<[i8, i16], CCPromoteToType<i32>>,

	
	// The first 4 integer arguments are passed in integer registers.
	//	CCIfType<[i32], CCAssignToReg<[D4, D5, D6, D7]>>,
	
	//CCIfType<[i32], CCAssignToReg<[A4, A5, A6, A7]>>,
	
	// Pointer arguments are handled inside TriCoreIselLowering, because
	// LLVM lowers i32** type into i32, hence there is no way to distingusish
	// between a pointer type and an integer type.
	

	
	
  //CCDelegateTo<CC_TriCore_StackModel>
  
  // Integer values get stored in stack slots that are 4 bytes in
  // size and 4-byte aligned.
  CCIfType<[i32], CCAssignToStack<4, 4>>
]>;

//def CC_Save : CalleeSavedRegs<(add R4, R5, R6, R7, R8, R9)>;