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, CodeGenOpt::Level 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, CodeGenOpt::Level 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, CodeGenOpt::Level OL, 106 bool JIT); 107 }; 108 109 } // end namespace llvm 110 111 #endif // LLVM_LIB_TARGET_MIPS_MIPSTARGETMACHINE_H 112