llvm-6502/lib/Target/IA64/IA64ISelLowering.h

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//===-- IA64ISelLowering.h - IA64 DAG Lowering Interface --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Duraid Madina and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the interfaces that IA64 uses to lower LLVM code into a
// selection DAG.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TARGET_IA64_IA64ISELLOWERING_H
#define LLVM_TARGET_IA64_IA64ISELLOWERING_H
#include "llvm/Target/TargetLowering.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "IA64.h"
namespace llvm {
namespace IA64ISD {
enum NodeType {
// Start the numbering where the builting ops and target ops leave off.
FIRST_NUMBER = ISD::BUILTIN_OP_END+IA64::INSTRUCTION_LIST_END,
/// FSEL - Traditional three-operand fsel node.
///
FSEL,
/// FCFID - The FCFID instruction, taking an f64 operand and producing
/// and f64 value containing the FP representation of the integer that
/// was temporarily in the f64 operand.
FCFID,
/// FCTI[D,W]Z - The FCTIDZ and FCTIWZ instructions, taking an f32 or f64
/// operand, producing an f64 value containing the integer representation
/// of that FP value.
FCTIDZ, FCTIWZ,
/// GETFD - the getf.d instruction takes a floating point operand and
/// returns its 64-bit memory representation as an i64
GETFD,
// TODO: explain this hack
BRCALL
};
}
class IA64TargetLowering : public TargetLowering {
int VarArgsFrameIndex; // FrameIndex for start of varargs area.
//int ReturnAddrIndex; // FrameIndex for return slot.
unsigned GP, SP, RP; // FIXME - clean this mess up
public:
IA64TargetLowering(TargetMachine &TM);
unsigned VirtGPR; // this is public so it can be accessed in the selector
// for ISD::RET. add an accessor instead? FIXME
/// LowerOperation - Provide custom lowering hooks for some operations.
///
// XXX virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
/// LowerArguments - This hook must be implemented to indicate how we should
/// lower the arguments for the specified function, into the specified DAG.
virtual std::vector<SDOperand>
LowerArguments(Function &F, SelectionDAG &DAG);
/// LowerCallTo - This hook lowers an abstract call to a function into an
/// actual call.
virtual std::pair<SDOperand, SDOperand>
LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg,
unsigned CC,
bool isTailCall, SDOperand Callee, ArgListTy &Args,
SelectionDAG &DAG);
virtual SDOperand LowerVAStart(SDOperand Chain, SDOperand VAListP,
Value *VAListV, SelectionDAG &DAG);
virtual std::pair<SDOperand,SDOperand>
LowerVAArg(SDOperand Chain, SDOperand VAListP, Value *VAListV,
const Type *ArgTy, SelectionDAG &DAG);
virtual std::pair<SDOperand, SDOperand>
LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, unsigned Depth,
SelectionDAG &DAG);
// XXX virtual MachineBasicBlock *InsertAtEndOfBasicBlock(MachineInstr *MI,
// XXX MachineBasicBlock *MBB);
};
}
#endif // LLVM_TARGET_IA64_IA64ISELLOWERING_H