1 //===-- IA64ISelLowering.h - IA64 DAG Lowering Interface --------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Duraid Madina and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that IA64 uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_TARGET_IA64_IA64ISELLOWERING_H
16 #define LLVM_TARGET_IA64_IA64ISELLOWERING_H
18 #include "llvm/Target/TargetLowering.h"
19 #include "llvm/CodeGen/SelectionDAG.h"
25 // Start the numbering where the builting ops and target ops leave off.
26 FIRST_NUMBER = ISD::BUILTIN_OP_END+IA64::INSTRUCTION_LIST_END,
28 /// GETFD - the getf.d instruction takes a floating point operand and
29 /// returns its 64-bit memory representation as an i64
32 // TODO: explain this hack
37 class IA64TargetLowering : public TargetLowering {
38 int VarArgsFrameIndex; // FrameIndex for start of varargs area.
39 //int ReturnAddrIndex; // FrameIndex for return slot.
40 unsigned GP, SP, RP; // FIXME - clean this mess up
43 IA64TargetLowering(TargetMachine &TM);
45 unsigned VirtGPR; // this is public so it can be accessed in the selector
46 // for ISD::RET. add an accessor instead? FIXME
48 /// LowerOperation - Provide custom lowering hooks for some operations.
50 // XXX virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
52 const char *getTargetNodeName(unsigned Opcode) const;
54 /// LowerArguments - This hook must be implemented to indicate how we should
55 /// lower the arguments for the specified function, into the specified DAG.
56 virtual std::vector<SDOperand>
57 LowerArguments(Function &F, SelectionDAG &DAG);
59 /// LowerCallTo - This hook lowers an abstract call to a function into an
61 virtual std::pair<SDOperand, SDOperand>
62 LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg,
64 bool isTailCall, SDOperand Callee, ArgListTy &Args,
67 virtual SDOperand LowerVAStart(SDOperand Chain, SDOperand VAListP,
68 Value *VAListV, SelectionDAG &DAG);
70 virtual std::pair<SDOperand,SDOperand>
71 LowerVAArg(SDOperand Chain, SDOperand VAListP, Value *VAListV,
72 const Type *ArgTy, SelectionDAG &DAG);
74 virtual std::pair<SDOperand, SDOperand>
75 LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, unsigned Depth,
78 // XXX virtual MachineBasicBlock *InsertAtEndOfBasicBlock(MachineInstr *MI,
79 // XXX MachineBasicBlock *MBB);
83 #endif // LLVM_TARGET_IA64_IA64ISELLOWERING_H