1 //===-- MipsSEISelDAGToDAG.h - A Dag to Dag Inst Selector for MipsSE -----===//
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 MipsDAGToDAGISel specialized for mips32/64.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_LIB_TARGET_MIPS_MIPSSEISELDAGTODAG_H
15 #define LLVM_LIB_TARGET_MIPS_MIPSSEISELDAGTODAG_H
16 
17 #include "MipsISelDAGToDAG.h"
18 
19 namespace llvm {
20 
21 class MipsSEDAGToDAGISel : public MipsDAGToDAGISel {
22 
23 public:
MipsSEDAGToDAGISel(MipsTargetMachine & TM)24   explicit MipsSEDAGToDAGISel(MipsTargetMachine &TM) : MipsDAGToDAGISel(TM) {}
25 
26 private:
27 
28   bool runOnMachineFunction(MachineFunction &MF) override;
29 
30   void addDSPCtrlRegOperands(bool IsDef, MachineInstr &MI,
31                              MachineFunction &MF);
32 
33   unsigned getMSACtrlReg(const SDValue RegIdx) const;
34 
35   bool replaceUsesWithZeroReg(MachineRegisterInfo *MRI, const MachineInstr&);
36 
37   std::pair<SDNode*, SDNode*> selectMULT(SDNode *N, unsigned Opc, SDLoc dl,
38                                          EVT Ty, bool HasLo, bool HasHi);
39 
40   SDNode *selectAddESubE(unsigned MOp, SDValue InFlag, SDValue CmpLHS,
41                          SDLoc DL, SDNode *Node) const;
42 
43   bool selectAddrFrameIndex(SDValue Addr, SDValue &Base, SDValue &Offset) const;
44   bool selectAddrFrameIndexOffset(SDValue Addr, SDValue &Base, SDValue &Offset,
45                                   unsigned OffsetBits) const;
46 
47   bool selectAddrRegImm(SDValue Addr, SDValue &Base,
48                         SDValue &Offset) const override;
49 
50   bool selectAddrRegReg(SDValue Addr, SDValue &Base,
51                         SDValue &Offset) const override;
52 
53   bool selectAddrDefault(SDValue Addr, SDValue &Base,
54                          SDValue &Offset) const override;
55 
56   bool selectIntAddr(SDValue Addr, SDValue &Base,
57                      SDValue &Offset) const override;
58 
59   bool selectAddrRegImm9(SDValue Addr, SDValue &Base,
60                          SDValue &Offset) const;
61 
62   bool selectAddrRegImm10(SDValue Addr, SDValue &Base,
63                           SDValue &Offset) const;
64 
65   bool selectAddrRegImm12(SDValue Addr, SDValue &Base,
66                           SDValue &Offset) const;
67 
68   bool selectAddrRegImm16(SDValue Addr, SDValue &Base,
69                           SDValue &Offset) const;
70 
71   bool selectIntAddrMM(SDValue Addr, SDValue &Base,
72                        SDValue &Offset) const override;
73 
74   bool selectIntAddrLSL2MM(SDValue Addr, SDValue &Base,
75                            SDValue &Offset) const override;
76 
77   bool selectIntAddrMSA(SDValue Addr, SDValue &Base,
78                         SDValue &Offset) const override;
79 
80   /// \brief Select constant vector splats.
81   bool selectVSplat(SDNode *N, APInt &Imm) const override;
82   /// \brief Select constant vector splats whose value fits in a given integer.
83   bool selectVSplatCommon(SDValue N, SDValue &Imm, bool Signed,
84                                   unsigned ImmBitSize) const;
85   /// \brief Select constant vector splats whose value fits in a uimm1.
86   bool selectVSplatUimm1(SDValue N, SDValue &Imm) const override;
87   /// \brief Select constant vector splats whose value fits in a uimm2.
88   bool selectVSplatUimm2(SDValue N, SDValue &Imm) const override;
89   /// \brief Select constant vector splats whose value fits in a uimm3.
90   bool selectVSplatUimm3(SDValue N, SDValue &Imm) const override;
91   /// \brief Select constant vector splats whose value fits in a uimm4.
92   bool selectVSplatUimm4(SDValue N, SDValue &Imm) const override;
93   /// \brief Select constant vector splats whose value fits in a uimm5.
94   bool selectVSplatUimm5(SDValue N, SDValue &Imm) const override;
95   /// \brief Select constant vector splats whose value fits in a uimm6.
96   bool selectVSplatUimm6(SDValue N, SDValue &Imm) const override;
97   /// \brief Select constant vector splats whose value fits in a uimm8.
98   bool selectVSplatUimm8(SDValue N, SDValue &Imm) const override;
99   /// \brief Select constant vector splats whose value fits in a simm5.
100   bool selectVSplatSimm5(SDValue N, SDValue &Imm) const override;
101   /// \brief Select constant vector splats whose value is a power of 2.
102   bool selectVSplatUimmPow2(SDValue N, SDValue &Imm) const override;
103   /// \brief Select constant vector splats whose value is the inverse of a
104   /// power of 2.
105   bool selectVSplatUimmInvPow2(SDValue N, SDValue &Imm) const override;
106   /// \brief Select constant vector splats whose value is a run of set bits
107   /// ending at the most significant bit
108   bool selectVSplatMaskL(SDValue N, SDValue &Imm) const override;
109   /// \brief Select constant vector splats whose value is a run of set bits
110   /// starting at bit zero.
111   bool selectVSplatMaskR(SDValue N, SDValue &Imm) const override;
112 
113   std::pair<bool, SDNode*> selectNode(SDNode *Node) override;
114 
115   void processFunctionAfterISel(MachineFunction &MF) override;
116 
117   // Insert instructions to initialize the global base register in the
118   // first MBB of the function.
119   void initGlobalBaseReg(MachineFunction &MF);
120 
121   bool SelectInlineAsmMemoryOperand(const SDValue &Op,
122                                     unsigned ConstraintID,
123                                     std::vector<SDValue> &OutOps) override;
124 };
125 
126 FunctionPass *createMipsSEISelDag(MipsTargetMachine &TM);
127 
128 }
129 
130 #endif
131