1 //===- MipsTargetMachine.h - Define TargetMachine for Mips ------*- 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 // This file declares the Mips specific subclass of TargetMachine.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_LIB_TARGET_MIPS_MIPSTARGETMACHINE_H
15 #define LLVM_LIB_TARGET_MIPS_MIPSTARGETMACHINE_H
16 
17 #include "MCTargetDesc/MipsABIInfo.h"
18 #include "MipsSubtarget.h"
19 #include "llvm/ADT/Optional.h"
20 #include "llvm/ADT/StringMap.h"
21 #include "llvm/ADT/StringRef.h"
22 #include "llvm/Support/CodeGen.h"
23 #include "llvm/Target/TargetMachine.h"
24 #include <memory>
25 
26 namespace llvm {
27 
28 class MipsTargetMachine : public LLVMTargetMachine {
29   bool isLittle;
30   std::unique_ptr<TargetLoweringObjectFile> TLOF;
31   // Selected ABI
32   MipsABIInfo ABI;
33   MipsSubtarget *Subtarget;
34   MipsSubtarget DefaultSubtarget;
35   MipsSubtarget NoMips16Subtarget;
36   MipsSubtarget Mips16Subtarget;
37 
38   mutable StringMap<std::unique_ptr<MipsSubtarget>> SubtargetMap;
39 
40 public:
41   MipsTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
42                     StringRef FS, const TargetOptions &Options,
43                     Optional<Reloc::Model> RM, CodeModel::Model CM,
44                     CodeGenOpt::Level OL, bool isLittle);
45   ~MipsTargetMachine() override;
46 
47   TargetIRAnalysis getTargetIRAnalysis() override;
48 
49   const MipsSubtarget *getSubtargetImpl() const {
50     if (Subtarget)
51       return Subtarget;
52     return &DefaultSubtarget;
53   }
54 
55   const MipsSubtarget *getSubtargetImpl(const Function &F) const override;
56 
57   /// \brief Reset the subtarget for the Mips target.
58   void resetSubtarget(MachineFunction *MF);
59 
60   // Pass Pipeline Configuration
61   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
62 
63   TargetLoweringObjectFile *getObjFileLowering() const override {
64     return TLOF.get();
65   }
66 
67   bool isLittleEndian() const { return isLittle; }
68   const MipsABIInfo &getABI() const { return ABI; }
69 };
70 
71 /// Mips32/64 big endian target machine.
72 ///
73 class MipsebTargetMachine : public MipsTargetMachine {
74   virtual void anchor();
75 
76 public:
77   MipsebTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
78                       StringRef FS, const TargetOptions &Options,
79                       Optional<Reloc::Model> RM, CodeModel::Model CM,
80                       CodeGenOpt::Level OL);
81 };
82 
83 /// Mips32/64 little endian target machine.
84 ///
85 class MipselTargetMachine : public MipsTargetMachine {
86   virtual void anchor();
87 
88 public:
89   MipselTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
90                       StringRef FS, const TargetOptions &Options,
91                       Optional<Reloc::Model> RM, CodeModel::Model CM,
92                       CodeGenOpt::Level OL);
93 };
94 
95 } // end namespace llvm
96 
97 #endif // LLVM_LIB_TARGET_MIPS_MIPSTARGETMACHINE_H
98