1 //==-- AArch64TargetMachine.h - Define TargetMachine for AArch64 -*- 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 AArch64 specific subclass of TargetMachine. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_LIB_TARGET_AARCH64_AARCH64TARGETMACHINE_H 14 #define LLVM_LIB_TARGET_AARCH64_AARCH64TARGETMACHINE_H 15 16 #include "AArch64InstrInfo.h" 17 #include "AArch64Subtarget.h" 18 #include "llvm/CodeGen/CodeGenTargetMachineImpl.h" 19 #include "llvm/IR/DataLayout.h" 20 #include <optional> 21 22 namespace llvm { 23 24 class AArch64TargetMachine : public CodeGenTargetMachineImpl { 25 protected: 26 std::unique_ptr<TargetLoweringObjectFile> TLOF; 27 mutable StringMap<std::unique_ptr<AArch64Subtarget>> SubtargetMap; 28 29 /// Reset internal state. 30 void reset() override; 31 32 public: 33 AArch64TargetMachine(const Target &T, const Triple &TT, StringRef CPU, 34 StringRef FS, const TargetOptions &Options, 35 std::optional<Reloc::Model> RM, 36 std::optional<CodeModel::Model> CM, CodeGenOptLevel OL, 37 bool JIT, bool IsLittleEndian); 38 39 ~AArch64TargetMachine() override; 40 const AArch64Subtarget *getSubtargetImpl(const Function &F) const override; 41 // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget, 42 // subtargets are per-function entities based on the target-specific 43 // attributes of each function. 44 const AArch64Subtarget *getSubtargetImpl() const = delete; 45 46 // Pass Pipeline Configuration 47 TargetPassConfig *createPassConfig(PassManagerBase &PM) override; 48 49 void registerPassBuilderCallbacks(PassBuilder &PB) override; 50 51 TargetTransformInfo getTargetTransformInfo(const Function &F) const override; 52 getObjFileLowering()53 TargetLoweringObjectFile* getObjFileLowering() const override { 54 return TLOF.get(); 55 } 56 57 MachineFunctionInfo * 58 createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F, 59 const TargetSubtargetInfo *STI) const override; 60 61 yaml::MachineFunctionInfo *createDefaultFuncInfoYAML() const override; 62 yaml::MachineFunctionInfo * 63 convertFuncInfoToYAML(const MachineFunction &MF) const override; 64 bool parseMachineFunctionInfo(const yaml::MachineFunctionInfo &, 65 PerFunctionMIParsingState &PFS, 66 SMDiagnostic &Error, 67 SMRange &SourceRange) const override; 68 69 /// Returns true if a cast between SrcAS and DestAS is a noop. isNoopAddrSpaceCast(unsigned SrcAS,unsigned DestAS)70 bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override { 71 return getPointerSize(SrcAS) == getPointerSize(DestAS); 72 } 73 ScheduleDAGInstrs * 74 createMachineScheduler(MachineSchedContext *C) const override; 75 76 ScheduleDAGInstrs * 77 createPostMachineScheduler(MachineSchedContext *C) const override; 78 79 size_t clearLinkerOptimizationHints( 80 const SmallPtrSetImpl<MachineInstr *> &MIs) const override; 81 82 private: 83 bool isLittle; 84 }; 85 86 // AArch64 little endian target machine. 87 // 88 class AArch64leTargetMachine : public AArch64TargetMachine { 89 virtual void anchor(); 90 91 public: 92 AArch64leTargetMachine(const Target &T, const Triple &TT, StringRef CPU, 93 StringRef FS, const TargetOptions &Options, 94 std::optional<Reloc::Model> RM, 95 std::optional<CodeModel::Model> CM, CodeGenOptLevel OL, 96 bool JIT); 97 }; 98 99 // AArch64 big endian target machine. 100 // 101 class AArch64beTargetMachine : public AArch64TargetMachine { 102 virtual void anchor(); 103 104 public: 105 AArch64beTargetMachine(const Target &T, const Triple &TT, StringRef CPU, 106 StringRef FS, const TargetOptions &Options, 107 std::optional<Reloc::Model> RM, 108 std::optional<CodeModel::Model> CM, CodeGenOptLevel OL, 109 bool JIT); 110 }; 111 112 } // end namespace llvm 113 114 #endif 115