SIISelLowering.h revision cc22640c4c8f0bc5d1e37b4ddcdf9e7c873e4383 
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  void LowerSI_WQM(MachineInstr *MI, MachineBasicBlock &BB,
28              MachineBasicBlock::iterator I, MachineRegisterInfo & MRI) const;
29
30  SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
31  SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG) const;
32
33  bool foldImm(SDValue &Operand, int32_t &Immediate,
34               bool &ScalarSlotUsed) const;
35  bool fitsRegClass(SelectionDAG &DAG, SDValue &Op, unsigned RegClass) const;
36  void ensureSRegLimit(SelectionDAG &DAG, SDValue &Operand,
37                       unsigned RegClass, bool &ScalarSlotUsed) const;
38
39public:
40  SITargetLowering(TargetMachine &tm);
41
42  SDValue LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv,
43                               bool isVarArg,
44                               const SmallVectorImpl<ISD::InputArg> &Ins,
45                               DebugLoc DL, SelectionDAG &DAG,
46                               SmallVectorImpl<SDValue> &InVals) const;
47
48  virtual MachineBasicBlock * EmitInstrWithCustomInserter(MachineInstr * MI,
49                                              MachineBasicBlock * BB) const;
50  virtual EVT getSetCCResultType(EVT VT) const;
51  virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
52  virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
53  virtual SDNode *PostISelFolding(MachineSDNode *N, SelectionDAG &DAG) const;
54
55  int32_t analyzeImmediate(const SDNode *N) const;
56};
57
58} // End namespace llvm
59
60#endif //SIISELLOWERING_H
61