MipsSEISelLowering.h revision cd81d94322a39503e4a3e87b6ee03d4fcb3465fb 
1//===-- MipsSEISelLowering.h - MipsSE 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// Subclass of MipsTargetLowering specialized for mips32/64.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef MIPSSEISELLOWERING_H
15#define MIPSSEISELLOWERING_H
16
17#include "MipsISelLowering.h"
18#include "MipsRegisterInfo.h"
19
20namespace llvm {
21  class MipsSETargetLowering : public MipsTargetLowering  {
22  public:
23    explicit MipsSETargetLowering(MipsTargetMachine &TM);
24
25    /// \brief Enable MSA support for the given integer type and Register
26    /// class.
27    void addMSAIntType(MVT::SimpleValueType Ty, const TargetRegisterClass *RC);
28    /// \brief Enable MSA support for the given floating-point type and
29    /// Register class.
30    void addMSAFloatType(MVT::SimpleValueType Ty,
31                         const TargetRegisterClass *RC);
32
33    bool allowsUnalignedMemoryAccesses(EVT VT, unsigned AS = 0,
34                                       bool *Fast = nullptr) const override;
35
36    SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
37
38    SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
39
40    MachineBasicBlock *
41    EmitInstrWithCustomInserter(MachineInstr *MI,
42                                MachineBasicBlock *MBB) const override;
43
44    bool isShuffleMaskLegal(const SmallVectorImpl<int> &Mask,
45                            EVT VT) const override {
46      return false;
47    }
48
49    const TargetRegisterClass *getRepRegClassFor(MVT VT) const override;
50
51  private:
52    bool isEligibleForTailCallOptimization(const MipsCC &MipsCCInfo,
53                                     unsigned NextStackOffset,
54                                     const MipsFunctionInfo& FI) const override;
55
56    void
57    getOpndList(SmallVectorImpl<SDValue> &Ops,
58                std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
59                bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
60                CallLoweringInfo &CLI, SDValue Callee,
61                SDValue Chain) const override;
62
63    SDValue lowerLOAD(SDValue Op, SelectionDAG &DAG) const;
64    SDValue lowerSTORE(SDValue Op, SelectionDAG &DAG) const;
65
66    SDValue lowerMulDiv(SDValue Op, unsigned NewOpc, bool HasLo, bool HasHi,
67                        SelectionDAG &DAG) const;
68
69    SDValue lowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
70    SDValue lowerINTRINSIC_W_CHAIN(SDValue Op, SelectionDAG &DAG) const;
71    SDValue lowerINTRINSIC_VOID(SDValue Op, SelectionDAG &DAG) const;
72    SDValue lowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const;
73    SDValue lowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const;
74    /// \brief Lower VECTOR_SHUFFLE into one of a number of instructions
75    /// depending on the indices in the shuffle.
76    SDValue lowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const;
77
78    MachineBasicBlock *emitBPOSGE32(MachineInstr *MI,
79                                    MachineBasicBlock *BB) const;
80    MachineBasicBlock *emitMSACBranchPseudo(MachineInstr *MI,
81                                            MachineBasicBlock *BB,
82                                            unsigned BranchOp) const;
83    /// \brief Emit the COPY_FW pseudo instruction
84    MachineBasicBlock *emitCOPY_FW(MachineInstr *MI,
85                                   MachineBasicBlock *BB) const;
86    /// \brief Emit the COPY_FD pseudo instruction
87    MachineBasicBlock *emitCOPY_FD(MachineInstr *MI,
88                                   MachineBasicBlock *BB) const;
89    /// \brief Emit the INSERT_FW pseudo instruction
90    MachineBasicBlock *emitINSERT_FW(MachineInstr *MI,
91                                     MachineBasicBlock *BB) const;
92    /// \brief Emit the INSERT_FD pseudo instruction
93    MachineBasicBlock *emitINSERT_FD(MachineInstr *MI,
94                                     MachineBasicBlock *BB) const;
95    /// \brief Emit the INSERT_([BHWD]|F[WD])_VIDX pseudo instruction
96    MachineBasicBlock *emitINSERT_DF_VIDX(MachineInstr *MI,
97                                          MachineBasicBlock *BB,
98                                          unsigned EltSizeInBytes,
99                                          bool IsFP) const;
100    /// \brief Emit the FILL_FW pseudo instruction
101    MachineBasicBlock *emitFILL_FW(MachineInstr *MI,
102                                   MachineBasicBlock *BB) const;
103    /// \brief Emit the FILL_FD pseudo instruction
104    MachineBasicBlock *emitFILL_FD(MachineInstr *MI,
105                                   MachineBasicBlock *BB) const;
106    /// \brief Emit the FEXP2_W_1 pseudo instructions.
107    MachineBasicBlock *emitFEXP2_W_1(MachineInstr *MI,
108                                     MachineBasicBlock *BB) const;
109    /// \brief Emit the FEXP2_D_1 pseudo instructions.
110    MachineBasicBlock *emitFEXP2_D_1(MachineInstr *MI,
111                                     MachineBasicBlock *BB) const;
112  };
113}
114
115#endif // MipsSEISELLOWERING_H
116