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diff --git a/llvm/lib/Target/Mips/MipsISelLowering.h b/llvm/lib/Target/Mips/MipsISelLowering.h
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+++ b/llvm/lib/Target/Mips/MipsISelLowering.h
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+//===-- MipsISelLowering.h - Mips DAG Lowering Interface --------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Bruno Cardoso Lopes and is distributed under the 
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the interfaces that Mips uses to lower LLVM code into a
+// selection DAG.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef MipsISELLOWERING_H
+#define MipsISELLOWERING_H
+
+#include "llvm/CodeGen/SelectionDAG.h"
+#include "llvm/Target/TargetLowering.h"
+#include "Mips.h"
+#include "MipsSubtarget.h"
+
+namespace llvm {
+  namespace MipsISD {
+    enum NodeType {
+      // Start the numbering from where ISD NodeType finishes.
+      FIRST_NUMBER = ISD::BUILTIN_OP_END+Mips::INSTRUCTION_LIST_END,
+
+      // Jump and link (call)
+      JmpLink,
+
+      // Get the Higher 16 bits from a 32-bit immediate
+      // No relation with Mips Hi register
+      Hi, 
+
+      // Get the Lower 16 bits from a 32-bit immediate
+      // No relation with Mips Lo register
+      Lo, 
+
+      // Return 
+      Ret
+    };
+  }
+
+  //===--------------------------------------------------------------------===//
+  // TargetLowering Implementation
+  //===--------------------------------------------------------------------===//
+  class MipsTargetLowering : public TargetLowering 
+  {
+    // FrameIndex for return slot.
+    int ReturnAddrIndex;
+
+    // const MipsSubtarget &MipsSubTarget;
+  public:
+
+    MipsTargetLowering(MipsTargetMachine &TM);
+
+    /// LowerOperation - Provide custom lowering hooks for some operations.
+    virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
+
+    /// getTargetNodeName - This method returns the name of a target specific 
+    //  DAG node.
+    virtual const char *getTargetNodeName(unsigned Opcode) const;
+
+  private:
+    // Lower Operand helpers
+    SDOperand LowerCCCArguments(SDOperand Op, SelectionDAG &DAG);
+    SDOperand LowerCCCCallTo(SDOperand Op, SelectionDAG &DAG, unsigned CC);
+    SDNode *LowerCallResult(SDOperand Chain, SDOperand InFlag, SDNode*TheCall,
+                            unsigned CallingConv, SelectionDAG &DAG);
+    SDOperand getReturnAddressFrameIndex(SelectionDAG &DAG);
+
+    // Lower Operand specifics
+    SDOperand LowerRET(SDOperand Op, SelectionDAG &DAG);
+    SDOperand LowerCALL(SDOperand Op, SelectionDAG &DAG);
+    SDOperand LowerFORMAL_ARGUMENTS(SDOperand Op, SelectionDAG &DAG);
+    SDOperand LowerGlobalAddress(SDOperand Op, SelectionDAG &DAG);
+    SDOperand LowerRETURNADDR(SDOperand Op, SelectionDAG &DAG);
+
+  };
+}
+
+#endif // MipsISELLOWERING_H