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//===- BlackfinISelLowering.h - Blackfin DAG Lowering Interface -*- C++ -*-===//
//
// 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 interfaces that Blackfin uses to lower LLVM code into a
// selection DAG.
//
//===----------------------------------------------------------------------===//
#ifndef BLACKFIN_ISELLOWERING_H
#define BLACKFIN_ISELLOWERING_H
#include "llvm/Target/TargetLowering.h"
#include "Blackfin.h"
namespace llvm {
namespace BFISD {
enum {
FIRST_NUMBER = ISD::BUILTIN_OP_END,
CALL, // A call instruction.
RET_FLAG, // Return with a flag operand.
Wrapper // Address wrapper
};
}
class BlackfinTargetLowering : public TargetLowering {
public:
BlackfinTargetLowering(TargetMachine &TM);
virtual MVT getShiftAmountTy(EVT LHSTy) const { return MVT::i16; }
virtual EVT getSetCCResultType(EVT VT) const;
virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
virtual void ReplaceNodeResults(SDNode *N,
SmallVectorImpl<SDValue> &Results,
SelectionDAG &DAG) const;
ConstraintType getConstraintType(const std::string &Constraint) const;
/// Examine constraint string and operand type and determine a weight value.
/// The operand object must already have been set up with the operand type.
ConstraintWeight getSingleConstraintMatchWeight(
AsmOperandInfo &info, const char *constraint) const;
std::pair<unsigned, const TargetRegisterClass*>
getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const;
virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
const char *getTargetNodeName(unsigned Opcode) const;
private:
SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerADDE(SDValue Op, SelectionDAG &DAG) const;
virtual SDValue
LowerFormalArguments(SDValue Chain,
CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<ISD::InputArg> &Ins,
DebugLoc dl, SelectionDAG &DAG,
SmallVectorImpl<SDValue> &InVals) const;
virtual SDValue
LowerCall(SDValue Chain, SDValue Callee,
CallingConv::ID CallConv, bool isVarArg, bool &isTailCall,
const SmallVectorImpl<ISD::OutputArg> &Outs,
const SmallVectorImpl<SDValue> &OutVals,
const SmallVectorImpl<ISD::InputArg> &Ins,
DebugLoc dl, SelectionDAG &DAG,
SmallVectorImpl<SDValue> &InVals) const;
virtual SDValue
LowerReturn(SDValue Chain,
CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<ISD::OutputArg> &Outs,
const SmallVectorImpl<SDValue> &OutVals,
DebugLoc dl, SelectionDAG &DAG) const;
};
} // end namespace llvm
#endif // BLACKFIN_ISELLOWERING_H
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