1 //===- MipsOptionRecord.h - Abstraction for storing information -*- 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 // MipsOptionRecord - Abstraction for storing arbitrary information in
11 // ELF files. Arbitrary information (e.g. register usage) can be stored in Mips
12 // specific ELF sections like .Mips.options. Specific records should subclass
13 // MipsOptionRecord and provide an implementation to EmitMipsOptionRecord which
14 // basically just dumps the information into an ELF section. More information
15 // about .Mips.option can be found in the SysV ABI and the 64-bit ELF Object
16 // specification.
17 //
18 //===----------------------------------------------------------------------===//
19 
20 #ifndef LLVM_LIB_TARGET_MIPS_MIPSOPTIONRECORD_H
21 #define LLVM_LIB_TARGET_MIPS_MIPSOPTIONRECORD_H
22 
23 #include "MCTargetDesc/MipsMCTargetDesc.h"
24 #include "llvm/MC/MCContext.h"
25 #include "llvm/MC/MCRegisterInfo.h"
26 #include <cstdint>
27 
28 namespace llvm {
29 
30 class MipsELFStreamer;
31 
32 class MipsOptionRecord {
33 public:
34   virtual ~MipsOptionRecord() = default;
35 
36   virtual void EmitMipsOptionRecord() = 0;
37 };
38 
39 class MipsRegInfoRecord : public MipsOptionRecord {
40 public:
MipsRegInfoRecord(MipsELFStreamer * S,MCContext & Context)41   MipsRegInfoRecord(MipsELFStreamer *S, MCContext &Context)
42       : Streamer(S), Context(Context) {
43     ri_gprmask = 0;
44     ri_cprmask[0] = ri_cprmask[1] = ri_cprmask[2] = ri_cprmask[3] = 0;
45     ri_gp_value = 0;
46 
47     const MCRegisterInfo *TRI = Context.getRegisterInfo();
48     GPR32RegClass = &(TRI->getRegClass(Mips::GPR32RegClassID));
49     GPR64RegClass = &(TRI->getRegClass(Mips::GPR64RegClassID));
50     FGR32RegClass = &(TRI->getRegClass(Mips::FGR32RegClassID));
51     FGR64RegClass = &(TRI->getRegClass(Mips::FGR64RegClassID));
52     AFGR64RegClass = &(TRI->getRegClass(Mips::AFGR64RegClassID));
53     MSA128BRegClass = &(TRI->getRegClass(Mips::MSA128BRegClassID));
54     COP0RegClass = &(TRI->getRegClass(Mips::COP0RegClassID));
55     COP2RegClass = &(TRI->getRegClass(Mips::COP2RegClassID));
56     COP3RegClass = &(TRI->getRegClass(Mips::COP3RegClassID));
57   }
58 
59   ~MipsRegInfoRecord() override = default;
60 
61   void EmitMipsOptionRecord() override;
62   void SetPhysRegUsed(unsigned Reg, const MCRegisterInfo *MCRegInfo);
63 
64 private:
65   MipsELFStreamer *Streamer;
66   MCContext &Context;
67   const MCRegisterClass *GPR32RegClass;
68   const MCRegisterClass *GPR64RegClass;
69   const MCRegisterClass *FGR32RegClass;
70   const MCRegisterClass *FGR64RegClass;
71   const MCRegisterClass *AFGR64RegClass;
72   const MCRegisterClass *MSA128BRegClass;
73   const MCRegisterClass *COP0RegClass;
74   const MCRegisterClass *COP2RegClass;
75   const MCRegisterClass *COP3RegClass;
76   uint32_t ri_gprmask;
77   uint32_t ri_cprmask[4];
78   int64_t ri_gp_value;
79 };
80 
81 } // end namespace llvm
82 
83 #endif // LLVM_LIB_TARGET_MIPS_MIPSOPTIONRECORD_H
84