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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:
explicit 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 LowerGlobalTLSAddress(SDOperand Op, SelectionDAG &DAG);
SDOperand LowerJumpTable(SDOperand Op, SelectionDAG &DAG);
// Inline asm support
ConstraintType getConstraintType(const std::string &Constraint) const;
std::pair<unsigned, const TargetRegisterClass*>
getRegForInlineAsmConstraint(const std::string &Constraint,
MVT::ValueType VT) const;
std::vector<unsigned>
getRegClassForInlineAsmConstraint(const std::string &Constraint,
MVT::ValueType VT) const;
};
}
#endif // MipsISELLOWERING_H
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