SIISelLowering.h revision 4956bc61e1c86e781fd8abe14431c121d960d65b 
1//===-- SIISelLowering.h - SI 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 SI DAG Lowering interface definition
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef SIISELLOWERING_H
16#define SIISELLOWERING_H
17
18#include "AMDGPUISelLowering.h"
19#include "SIInstrInfo.h"
20
21namespace llvm {
22
23class SITargetLowering : public AMDGPUTargetLowering {
24  const SIInstrInfo * TII;
25  const TargetRegisterInfo * TRI;
26
27  SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
28  SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG) const;
29
30  bool foldImm(SDValue &Operand, int32_t &Immediate,
31               bool &ScalarSlotUsed) const;
32  bool fitsRegClass(SelectionDAG &DAG, const SDValue &Op,
33                    unsigned RegClass) const;
34  void ensureSRegLimit(SelectionDAG &DAG, SDValue &Operand,
35                       unsigned RegClass, bool &ScalarSlotUsed) const;
36
37  SDNode *foldOperands(MachineSDNode *N, SelectionDAG &DAG) const;
38  void adjustWritemask(MachineSDNode *&N, SelectionDAG &DAG) const;
39
40public:
41  SITargetLowering(TargetMachine &tm);
42
43  SDValue LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv,
44                               bool isVarArg,
45                               const SmallVectorImpl<ISD::InputArg> &Ins,
46                               SDLoc DL, SelectionDAG &DAG,
47                               SmallVectorImpl<SDValue> &InVals) const;
48
49  virtual MachineBasicBlock * EmitInstrWithCustomInserter(MachineInstr * MI,
50                                              MachineBasicBlock * BB) const;
51  virtual EVT getSetCCResultType(LLVMContext &Context, EVT VT) const;
52  virtual MVT getScalarShiftAmountTy(EVT VT) const;
53  virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
54  virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
55  virtual SDNode *PostISelFolding(MachineSDNode *N, SelectionDAG &DAG) const;
56  virtual void AdjustInstrPostInstrSelection(MachineInstr *MI,
57                                             SDNode *Node) const;
58
59  int32_t analyzeImmediate(const SDNode *N) const;
60};
61
62} // End namespace llvm
63
64#endif //SIISELLOWERING_H
65