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/Optional.h" 19 #include "llvm/ADT/StringMap.h" 20 #include "llvm/ADT/StringRef.h" 21 #include "llvm/Support/CodeGen.h" 22 #include "llvm/Target/TargetMachine.h" 23 #include <memory> 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 Optional<Reloc::Model> RM, Optional<CodeModel::Model> CM, 43 CodeGenOpt::Level OL, bool JIT, bool isLittle); 44 ~MipsTargetMachine() override; 45 46 TargetTransformInfo getTargetTransformInfo(const Function &F) override; 47 48 const MipsSubtarget *getSubtargetImpl() const { 49 if (Subtarget) 50 return Subtarget; 51 return &DefaultSubtarget; 52 } 53 54 const MipsSubtarget *getSubtargetImpl(const Function &F) const override; 55 56 /// Reset the subtarget for the Mips target. 57 void resetSubtarget(MachineFunction *MF); 58 59 // Pass Pipeline Configuration 60 TargetPassConfig *createPassConfig(PassManagerBase &PM) override; 61 62 TargetLoweringObjectFile *getObjFileLowering() const override { 63 return TLOF.get(); 64 } 65 66 /// Returns true if a cast between SrcAS and DestAS is a noop. 67 bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override { 68 // Mips doesn't have any special address spaces so we just reserve 69 // the first 256 for software use (e.g. OpenCL) and treat casts 70 // between them as noops. 71 return SrcAS < 256 && DestAS < 256; 72 } 73 74 bool isLittleEndian() const { return isLittle; } 75 const MipsABIInfo &getABI() const { return ABI; } 76 }; 77 78 /// Mips32/64 big endian target machine. 79 /// 80 class MipsebTargetMachine : public MipsTargetMachine { 81 virtual void anchor(); 82 83 public: 84 MipsebTargetMachine(const Target &T, const Triple &TT, StringRef CPU, 85 StringRef FS, const TargetOptions &Options, 86 Optional<Reloc::Model> RM, Optional<CodeModel::Model> CM, 87 CodeGenOpt::Level OL, bool JIT); 88 }; 89 90 /// Mips32/64 little endian target machine. 91 /// 92 class MipselTargetMachine : public MipsTargetMachine { 93 virtual void anchor(); 94 95 public: 96 MipselTargetMachine(const Target &T, const Triple &TT, StringRef CPU, 97 StringRef FS, const TargetOptions &Options, 98 Optional<Reloc::Model> RM, Optional<CodeModel::Model> CM, 99 CodeGenOpt::Level OL, bool JIT); 100 }; 101 102 } // end namespace llvm 103 104 #endif // LLVM_LIB_TARGET_MIPS_MIPSTARGETMACHINE_H 105