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 /// FSEL - Traditional three-operand fsel node.
32 /// FCFID - The FCFID instruction, taking an f64 operand and producing
33 /// and f64 value containing the FP representation of the integer that
34 /// was temporarily in the f64 operand.
37 /// FCTI[D,W]Z - The FCTIDZ and FCTIWZ instructions, taking an f32 or f64
38 /// operand, producing an f64 value containing the integer representation
44 class IA64TargetLowering : public TargetLowering {
45 int VarArgsFrameIndex; // FrameIndex for start of varargs area.
46 //int ReturnAddrIndex; // FrameIndex for return slot.
47 unsigned GP, SP, RP; // FIXME - clean this mess up
50 IA64TargetLowering(TargetMachine &TM);
52 unsigned VirtGPR; // this is public so it can be accessed in the selector
53 // for ISD::RET. add an accessor instead? FIXME
55 /// LowerOperation - Provide custom lowering hooks for some operations.
57 // XXX virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
59 /// LowerArguments - This hook must be implemented to indicate how we should
60 /// lower the arguments for the specified function, into the specified DAG.
61 virtual std::vector<SDOperand>
62 LowerArguments(Function &F, SelectionDAG &DAG);
64 /// LowerCallTo - This hook lowers an abstract call to a function into an
66 virtual std::pair<SDOperand, SDOperand>
67 LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg,
69 bool isTailCall, SDOperand Callee, ArgListTy &Args,
72 virtual SDOperand LowerVAStart(SDOperand Chain, SDOperand VAListP,
73 Value *VAListV, SelectionDAG &DAG);
75 virtual std::pair<SDOperand,SDOperand>
76 LowerVAArg(SDOperand Chain, SDOperand VAListP, Value *VAListV,
77 const Type *ArgTy, SelectionDAG &DAG);
79 virtual std::pair<SDOperand, SDOperand>
80 LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, unsigned Depth,
83 // XXX virtual MachineBasicBlock *InsertAtEndOfBasicBlock(MachineInstr *MI,
84 // XXX MachineBasicBlock *MBB);
88 #endif // LLVM_TARGET_IA64_IA64ISELLOWERING_H