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
42 /// GETFD - the getf.d instruction takes a floating point operand and
43 /// returns its 64-bit memory representation as an i64
46 // TODO: explain this hack
51 class IA64TargetLowering : public TargetLowering {
52 int VarArgsFrameIndex; // FrameIndex for start of varargs area.
53 //int ReturnAddrIndex; // FrameIndex for return slot.
54 unsigned GP, SP, RP; // FIXME - clean this mess up
57 IA64TargetLowering(TargetMachine &TM);
59 unsigned VirtGPR; // this is public so it can be accessed in the selector
60 // for ISD::RET. add an accessor instead? FIXME
62 /// LowerOperation - Provide custom lowering hooks for some operations.
64 // XXX virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
66 /// LowerArguments - This hook must be implemented to indicate how we should
67 /// lower the arguments for the specified function, into the specified DAG.
68 virtual std::vector<SDOperand>
69 LowerArguments(Function &F, SelectionDAG &DAG);
71 /// LowerCallTo - This hook lowers an abstract call to a function into an
73 virtual std::pair<SDOperand, SDOperand>
74 LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg,
76 bool isTailCall, SDOperand Callee, ArgListTy &Args,
79 virtual SDOperand LowerVAStart(SDOperand Chain, SDOperand VAListP,
80 Value *VAListV, SelectionDAG &DAG);
82 virtual std::pair<SDOperand,SDOperand>
83 LowerVAArg(SDOperand Chain, SDOperand VAListP, Value *VAListV,
84 const Type *ArgTy, SelectionDAG &DAG);
86 virtual std::pair<SDOperand, SDOperand>
87 LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, unsigned Depth,
90 // XXX virtual MachineBasicBlock *InsertAtEndOfBasicBlock(MachineInstr *MI,
91 // XXX MachineBasicBlock *MBB);
95 #endif // LLVM_TARGET_IA64_IA64ISELLOWERING_H