lib/Target/Mips/Mips16ISelDAGToDAG.h

   1 //===---- Mips16ISelDAGToDAG.h - A Dag to Dag Inst Selector for Mips ------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // Subclass of MipsDAGToDAGISel specialized for mips16.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_LIB_TARGET_MIPS_MIPS16ISELDAGTODAG_H
  14 #define LLVM_LIB_TARGET_MIPS_MIPS16ISELDAGTODAG_H
  15
  16 #include "MipsISelDAGToDAG.h"
  17
  18 namespace llvm {
  19
  20 class Mips16DAGToDAGISel : public MipsDAGToDAGISel {
  21 public:
  22   explicit Mips16DAGToDAGISel(MipsTargetMachine &TM, CodeGenOpt::Level OL)
  23       : MipsDAGToDAGISel(TM, OL) {}
  24
  25 private:
  26   std::pair<SDNode *, SDNode *> selectMULT(SDNode *N, unsigned Opc,
  27                                            const SDLoc &DL, EVT Ty, bool HasLo,
  28                                            bool HasHi);
  29
  30   bool runOnMachineFunction(MachineFunction &MF) override;
  31
  32   bool selectAddr(bool SPAllowed, SDValue Addr, SDValue &Base,
  33                   SDValue &Offset);
  34   bool selectAddr16(SDValue Addr, SDValue &Base,
  35                     SDValue &Offset) override;
  36   bool selectAddr16SP(SDValue Addr, SDValue &Base,
  37                       SDValue &Offset) override;
  38
  39   bool trySelect(SDNode *Node) override;
  40
  41   void processFunctionAfterISel(MachineFunction &MF) override;
  42
  43   // Insert instructions to initialize the global base register in the
  44   // first MBB of the function.
  45   void initGlobalBaseReg(MachineFunction &MF);
  46
  47   void initMips16SPAliasReg(MachineFunction &MF);
  48 };
  49
  50 FunctionPass *createMips16ISelDag(MipsTargetMachine &TM,
  51                                   CodeGenOpt::Level OptLevel);
  52 }
  53
  54 #endif