lib/Target/Mips/Mips16ISelLowering.h

   1 //===-- Mips16ISelLowering.h - Mips16 DAG Lowering Interface ----*- C++ -*-===//
   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 MipsTargetLowering specialized for mips16.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_LIB_TARGET_MIPS_MIPS16ISELLOWERING_H
  14 #define LLVM_LIB_TARGET_MIPS_MIPS16ISELLOWERING_H
  15
  16 #include "MipsISelLowering.h"
  17
  18 namespace llvm {
  19   class Mips16TargetLowering : public MipsTargetLowering  {
  20   public:
  21     explicit Mips16TargetLowering(const MipsTargetMachine &TM,
  22                                   const MipsSubtarget &STI);
  23
  24     bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AddrSpace,
  25                                         unsigned Align,
  26                                         bool *Fast) const override;
  27
  28     MachineBasicBlock *
  29     EmitInstrWithCustomInserter(MachineInstr &MI,
  30                                 MachineBasicBlock *MBB) const override;
  31
  32   private:
  33     bool isEligibleForTailCallOptimization(
  34         const CCState &CCInfo, unsigned NextStackOffset,
  35         const MipsFunctionInfo &FI) const override;
  36
  37     void setMips16HardFloatLibCalls();
  38
  39     unsigned int
  40       getMips16HelperFunctionStubNumber(ArgListTy &Args) const;
  41
  42     const char *getMips16HelperFunction
  43       (Type* RetTy, ArgListTy &Args, bool &needHelper) const;
  44
  45     void
  46     getOpndList(SmallVectorImpl<SDValue> &Ops,
  47                 std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
  48                 bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
  49                 bool IsCallReloc, CallLoweringInfo &CLI, SDValue Callee,
  50                 SDValue Chain) const override;
  51
  52     MachineBasicBlock *emitSel16(unsigned Opc, MachineInstr &MI,
  53                                  MachineBasicBlock *BB) const;
  54
  55     MachineBasicBlock *emitSeliT16(unsigned Opc1, unsigned Opc2,
  56                                    MachineInstr &MI,
  57                                    MachineBasicBlock *BB) const;
  58
  59     MachineBasicBlock *emitSelT16(unsigned Opc1, unsigned Opc2,
  60                                   MachineInstr &MI,
  61                                   MachineBasicBlock *BB) const;
  62
  63     MachineBasicBlock *emitFEXT_T8I816_ins(unsigned BtOpc, unsigned CmpOpc,
  64                                            MachineInstr &MI,
  65                                            MachineBasicBlock *BB) const;
  66
  67     MachineBasicBlock *emitFEXT_T8I8I16_ins(unsigned BtOpc, unsigned CmpiOpc,
  68                                             unsigned CmpiXOpc, bool ImmSigned,
  69                                             MachineInstr &MI,
  70                                             MachineBasicBlock *BB) const;
  71
  72     MachineBasicBlock *emitFEXT_CCRX16_ins(unsigned SltOpc, MachineInstr &MI,
  73                                            MachineBasicBlock *BB) const;
  74
  75     MachineBasicBlock *emitFEXT_CCRXI16_ins(unsigned SltiOpc, unsigned SltiXOpc,
  76                                             MachineInstr &MI,
  77                                             MachineBasicBlock *BB) const;
  78   };
  79 }
  80
  81 #endif