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
18namespace 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                                        MachineMemOperand::Flags Flags,
27                                        bool *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
83