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// SI DAG Lowering interface definition
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef SIISELLOWERING_H
15#define SIISELLOWERING_H
16
17#include "AMDGPUISelLowering.h"
18#include "SIInstrInfo.h"
19
20namespace llvm {
21
22class SITargetLowering : public AMDGPUTargetLowering
23{
24  const SIInstrInfo * TII;
25
26  /// AppendS_WAITCNT - Memory reads and writes are syncronized using the
27  /// S_WAITCNT instruction.  This function takes the most conservative
28  /// approach and inserts an S_WAITCNT instruction after every read and
29  /// write.
30  void AppendS_WAITCNT(MachineInstr *MI, MachineBasicBlock &BB,
31              MachineBasicBlock::iterator I) const;
32  void LowerSI_INTERP(MachineInstr *MI, MachineBasicBlock &BB,
33              MachineBasicBlock::iterator I, MachineRegisterInfo & MRI) const;
34  void LowerSI_INTERP_CONST(MachineInstr *MI, MachineBasicBlock &BB,
35              MachineBasicBlock::iterator I, MachineRegisterInfo &MRI) const;
36  void LowerSI_KIL(MachineInstr *MI, MachineBasicBlock &BB,
37              MachineBasicBlock::iterator I, MachineRegisterInfo & MRI) const;
38  void LowerSI_V_CNDLT(MachineInstr *MI, MachineBasicBlock &BB,
39              MachineBasicBlock::iterator I, MachineRegisterInfo & MRI) const;
40
41  SDValue Loweri1ContextSwitch(SDValue Op, SelectionDAG &DAG,
42                                           unsigned VCCNode) const;
43  SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG) const;
44  SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
45  SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
46
47public:
48  SITargetLowering(TargetMachine &tm);
49  virtual MachineBasicBlock * EmitInstrWithCustomInserter(MachineInstr * MI,
50                                              MachineBasicBlock * BB) const;
51  virtual EVT getSetCCResultType(EVT VT) const;
52  virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
53  virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
54  virtual const char* getTargetNodeName(unsigned Opcode) const;
55};
56
57} // End namespace llvm
58
59#endif //SIISELLOWERING_H
60