1//===-- R600ISelLowering.h - R600 DAG Lowering Interface -*- C++ -*--------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10/// \file
11/// \brief R600 DAG Lowering interface definition
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef R600ISELLOWERING_H
16#define R600ISELLOWERING_H
17
18#include "AMDGPUISelLowering.h"
19
20namespace llvm {
21
22class R600InstrInfo;
23
24class R600TargetLowering : public AMDGPUTargetLowering {
25public:
26  R600TargetLowering(TargetMachine &TM);
27  virtual MachineBasicBlock * EmitInstrWithCustomInserter(MachineInstr *MI,
28      MachineBasicBlock * BB) const;
29  virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
30  virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
31  void ReplaceNodeResults(SDNode * N,
32      SmallVectorImpl<SDValue> &Results,
33      SelectionDAG &DAG) const;
34  virtual SDValue LowerFormalArguments(
35                                      SDValue Chain,
36                                      CallingConv::ID CallConv,
37                                      bool isVarArg,
38                                      const SmallVectorImpl<ISD::InputArg> &Ins,
39                                      DebugLoc DL, SelectionDAG &DAG,
40                                      SmallVectorImpl<SDValue> &InVals) const;
41  virtual EVT getSetCCResultType(EVT VT) const;
42private:
43  const R600InstrInfo * TII;
44
45  /// Each OpenCL kernel has nine implicit parameters that are stored in the
46  /// first nine dwords of a Vertex Buffer.  These implicit parameters are
47  /// lowered to load instructions which retreive the values from the Vertex
48  /// Buffer.
49  SDValue LowerImplicitParameter(SelectionDAG &DAG, EVT VT,
50                                 DebugLoc DL, unsigned DwordOffset) const;
51
52  void lowerImplicitParameter(MachineInstr *MI, MachineBasicBlock &BB,
53      MachineRegisterInfo & MRI, unsigned dword_offset) const;
54
55  /// \brief Lower ROTL opcode to BITALIGN
56  SDValue LowerROTL(SDValue Op, SelectionDAG &DAG) const;
57
58  SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
59  SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const;
60  SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const;
61  SDValue LowerFPTOUINT(SDValue Op, SelectionDAG &DAG) const;
62  SDValue LowerFPOW(SDValue Op, SelectionDAG &DAG) const;
63  SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
64  SDValue LowerFrameIndex(SDValue Op, SelectionDAG &DAG) const;
65
66  SDValue stackPtrToRegIndex(SDValue Ptr, unsigned StackWidth,
67                                          SelectionDAG &DAG) const;
68  void getStackAddress(unsigned StackWidth, unsigned ElemIdx,
69                       unsigned &Channel, unsigned &PtrIncr) const;
70  bool isZero(SDValue Op) const;
71};
72
73} // End namespace llvm;
74
75#endif // R600ISELLOWERING_H
76