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diff --git a/include/llvm/CodeGen/InstrSelectionSupport.h b/include/llvm/CodeGen/InstrSelectionSupport.h
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+// $Id$ -*-c++-*-
+//***************************************************************************
+// File:
+//	InstrSelectionSupport.h
+// 
+// Purpose:
+//	Target-independent instruction selection code.
+//      See SparcInstrSelection.cpp for usage.
+//      
+// History:
+//	10/10/01	 -  Vikram Adve  -  Created
+//**************************************************************************/
+
+#ifndef LLVM_CODEGEN_INSTR_SELECTION_SUPPORT_H
+#define LLVM_CODEGEN_INSTR_SELECTION_SUPPORT_H
+
+#include "llvm/Instruction.h"
+#include "llvm/CodeGen/MachineInstr.h"
+class Method;
+class InstrForest;
+class MachineInstr;
+class InstructionNode;
+class TmpInstruction;
+class ConstPoolVal;
+class TargetMachine;
+
+//************************ Exported Functions ******************************/
+
+
+//---------------------------------------------------------------------------
+// Function: FoldGetElemChain
+// 
+// Purpose:
+//   Fold a chain of GetElementPtr instructions into an equivalent
+//   (Pointer, IndexVector) pair.  Returns the pointer Value, and
+//   stores the resulting IndexVector in argument chainIdxVec.
+//---------------------------------------------------------------------------
+
+Value*		FoldGetElemChain    (const InstructionNode* getElemInstrNode,
+				     vector<ConstPoolVal*>& chainIdxVec);
+
+
+//------------------------------------------------------------------------ 
+// Function Set2OperandsFromInstr
+// Function Set3OperandsFromInstr
+// 
+// Purpose:
+// 
+// For the common case of 2- and 3-operand arithmetic/logical instructions,
+// set the m/c instr. operands directly from the VM instruction's operands.
+// Check whether the first or second operand is 0 and can use a dedicated
+// "0" register.
+// Check whether the second operand should use an immediate field or register.
+// (First and third operands are never immediates for such instructions.)
+// 
+// Arguments:
+// canDiscardResult: Specifies that the result operand can be discarded
+//		     by using the dedicated "0"
+// 
+// op1position, op2position and resultPosition: Specify in which position
+//		     in the machine instruction the 3 operands (arg1, arg2
+//		     and result) should go.
+// 
+// RETURN VALUE: unsigned int flags, where
+//	flags & 0x01	=> operand 1 is constant and needs a register
+//	flags & 0x02	=> operand 2 is constant and needs a register
+//------------------------------------------------------------------------ 
+
+void		Set2OperandsFromInstr	(MachineInstr* minstr,
+					 InstructionNode* vmInstrNode,
+					 const TargetMachine& targetMachine,
+					 bool canDiscardResult = false,
+					 int op1Position = 0,
+					 int resultPosition = 1);
+
+void		Set3OperandsFromInstr	(MachineInstr* minstr,
+					 InstructionNode* vmInstrNode,
+					 const TargetMachine& targetMachine,
+					 bool canDiscardResult = false,
+					 int op1Position = 0,
+					 int op2Position = 1,
+					 int resultPosition = 2);
+
+
+//---------------------------------------------------------------------------
+// Function: ChooseRegOrImmed
+// 
+// Purpose:
+// 
+//---------------------------------------------------------------------------
+
+MachineOperand::MachineOperandType
+		ChooseRegOrImmed        (Value* val,
+                                         MachineOpCode opCode,
+                                         const TargetMachine& targetMachine,
+                                         bool canUseImmed,
+                                         unsigned int& getMachineRegNum,
+                                         int64_t& getImmedValue);
+
+//**************************************************************************/
+
+#endif