llvm/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                                         Align Alignment,
  26                                         MachineMemOperand::Flags Flags,
  27                                         unsigned *Fast) const override;
  28
  29     MachineBasicBlock *
  30     EmitInstrWithCustomInserter(MachineInstr &MI,
  31                                 MachineBasicBlock *MBB) const override;
  32
  33   private:
  34     bool isEligibleForTailCallOptimization(
  35         const CCState &CCInfo, unsigned NextStackOffset,
  36         const MipsFunctionInfo &FI) const override;
  37
  38     void setMips16HardFloatLibCalls();
  39
  40     unsigned int
  41       getMips16HelperFunctionStubNumber(ArgListTy &Args) const;
  42
  43     const char *getMips16HelperFunction
  44       (Type* RetTy, ArgListTy &Args, bool &needHelper) const;
  45
  46     void
  47     getOpndList(SmallVectorImpl<SDValue> &Ops,
  48                 std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
  49                 bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
  50                 bool IsCallReloc, CallLoweringInfo &CLI, SDValue Callee,
  51                 SDValue Chain) const override;
  52
  53     MachineBasicBlock *emitSel16(unsigned Opc, MachineInstr &MI,
  54                                  MachineBasicBlock *BB) const;
  55
  56     MachineBasicBlock *emitSeliT16(unsigned Opc1, unsigned Opc2,
  57                                    MachineInstr &MI,
  58                                    MachineBasicBlock *BB) const;
  59
  60     MachineBasicBlock *emitSelT16(unsigned Opc1, unsigned Opc2,
  61                                   MachineInstr &MI,
  62                                   MachineBasicBlock *BB) const;
  63
  64     MachineBasicBlock *emitFEXT_T8I816_ins(unsigned BtOpc, unsigned CmpOpc,
  65                                            MachineInstr &MI,
  66                                            MachineBasicBlock *BB) const;
  67
  68     MachineBasicBlock *emitFEXT_T8I8I16_ins(unsigned BtOpc, unsigned CmpiOpc,
  69                                             unsigned CmpiXOpc, bool ImmSigned,
  70                                             MachineInstr &MI,
  71                                             MachineBasicBlock *BB) const;
  72
  73     MachineBasicBlock *emitFEXT_CCRX16_ins(unsigned SltOpc, MachineInstr &MI,
  74                                            MachineBasicBlock *BB) const;
  75
  76     MachineBasicBlock *emitFEXT_CCRXI16_ins(unsigned SltiOpc, unsigned SltiXOpc,
  77                                             MachineInstr &MI,
  78                                             MachineBasicBlock *BB) const;
  79   };
  80 }
  81
  82 #endif