llvm/lib/Target/Mips/MipsTargetMachine.h

   1 //===- MipsTargetMachine.h - Define TargetMachine for Mips ------*- 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 // This file declares the Mips specific subclass of TargetMachine.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_LIB_TARGET_MIPS_MIPSTARGETMACHINE_H
  14 #define LLVM_LIB_TARGET_MIPS_MIPSTARGETMACHINE_H
  15
  16 #include "MCTargetDesc/MipsABIInfo.h"
  17 #include "MipsSubtarget.h"
  18 #include "llvm/ADT/StringMap.h"
  19 #include "llvm/ADT/StringRef.h"
  20 #include "llvm/Support/CodeGen.h"
  21 #include "llvm/Target/TargetMachine.h"
  22 #include <memory>
  23 #include <optional>
  24
  25 namespace llvm {
  26
  27 class MipsTargetMachine : public LLVMTargetMachine {
  28   bool isLittle;
  29   std::unique_ptr<TargetLoweringObjectFile> TLOF;
  30   // Selected ABI
  31   MipsABIInfo ABI;
  32   const MipsSubtarget *Subtarget;
  33   MipsSubtarget DefaultSubtarget;
  34   MipsSubtarget NoMips16Subtarget;
  35   MipsSubtarget Mips16Subtarget;
  36
  37   mutable StringMap<std::unique_ptr<MipsSubtarget>> SubtargetMap;
  38
  39 public:
  40   MipsTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
  41                     StringRef FS, const TargetOptions &Options,
  42                     std::optional<Reloc::Model> RM,
  43                     std::optional<CodeModel::Model> CM, CodeGenOptLevel OL,
  44                     bool JIT, bool isLittle);
  45   ~MipsTargetMachine() override;
  46
  47   TargetTransformInfo getTargetTransformInfo(const Function &F) const 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   /// 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   MachineFunctionInfo *
  68   createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
  69                             const TargetSubtargetInfo *STI) const override;
  70
  71   /// Returns true if a cast between SrcAS and DestAS is a noop.
  72   bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
  73     // Mips doesn't have any special address spaces so we just reserve
  74     // the first 256 for software use (e.g. OpenCL) and treat casts
  75     // between them as noops.
  76     return SrcAS < 256 && DestAS < 256;
  77   }
  78
  79   bool isLittleEndian() const { return isLittle; }
  80   const MipsABIInfo &getABI() const { return ABI; }
  81 };
  82
  83 /// Mips32/64 big endian target machine.
  84 ///
  85 class MipsebTargetMachine : public MipsTargetMachine {
  86   virtual void anchor();
  87
  88 public:
  89   MipsebTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
  90                       StringRef FS, const TargetOptions &Options,
  91                       std::optional<Reloc::Model> RM,
  92                       std::optional<CodeModel::Model> CM, CodeGenOptLevel OL,
  93                       bool JIT);
  94 };
  95
  96 /// Mips32/64 little endian target machine.
  97 ///
  98 class MipselTargetMachine : public MipsTargetMachine {
  99   virtual void anchor();
 100
 101 public:
 102   MipselTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
 103                       StringRef FS, const TargetOptions &Options,
 104                       std::optional<Reloc::Model> RM,
 105                       std::optional<CodeModel::Model> CM, CodeGenOptLevel OL,
 106                       bool JIT);
 107 };
 108
 109 } // end namespace llvm
 110
 111 #endif // LLVM_LIB_TARGET_MIPS_MIPSTARGETMACHINE_H