src/gallium/drivers/radeon/SIISelLowering.h

   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) const;
  36   void LowerSI_V_CNDLT(MachineInstr *MI, MachineBasicBlock &BB,
  37               MachineBasicBlock::iterator I, MachineRegisterInfo & MRI) const;
  38
  39   SDValue Loweri1ContextSwitch(SDValue Op, SelectionDAG &DAG,
  40                                            unsigned VCCNode) const;
  41   SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG) const;
  42   SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
  43   SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const;
  44
  45 public:
  46   SITargetLowering(TargetMachine &tm);
  47   virtual MachineBasicBlock * EmitInstrWithCustomInserter(MachineInstr * MI,
  48                                               MachineBasicBlock * BB) const;
  49   virtual EVT getSetCCResultType(EVT VT) const;
  50   virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
  51   virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
  52   virtual const char* getTargetNodeName(unsigned Opcode) const;
  53 };
  54
  55 } // End namespace llvm
  56
  57 #endif //SIISELLOWERING_H