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 20 namespace llvm { 21 22 class 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 47 public: 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
