1 //===-- ARMTargetMachine.h - Define TargetMachine for ARM -------*- 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 ARM specific subclass of TargetMachine. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_LIB_TARGET_ARM_ARMTARGETMACHINE_H 15 #define LLVM_LIB_TARGET_ARM_ARMTARGETMACHINE_H 16 17 #include "ARMSubtarget.h" 18 #include "llvm/ADT/Optional.h" 19 #include "llvm/ADT/StringMap.h" 20 #include "llvm/ADT/StringRef.h" 21 #include "llvm/Analysis/TargetTransformInfo.h" 22 #include "llvm/Support/CodeGen.h" 23 #include "llvm/Target/TargetMachine.h" 24 #include <memory> 25 26 namespace llvm { 27 28 class ARMBaseTargetMachine : public LLVMTargetMachine { 29 public: 30 enum ARMABI { 31 ARM_ABI_UNKNOWN, 32 ARM_ABI_APCS, 33 ARM_ABI_AAPCS, // ARM EABI 34 ARM_ABI_AAPCS16 35 } TargetABI; 36 37 protected: 38 std::unique_ptr<TargetLoweringObjectFile> TLOF; 39 bool isLittle; 40 mutable StringMap<std::unique_ptr<ARMSubtarget>> SubtargetMap; 41 42 public: 43 ARMBaseTargetMachine(const Target &T, const Triple &TT, StringRef CPU, 44 StringRef FS, const TargetOptions &Options, 45 Optional<Reloc::Model> RM, Optional<CodeModel::Model> CM, 46 CodeGenOpt::Level OL, bool isLittle); 47 ~ARMBaseTargetMachine() override; 48 49 const ARMSubtarget *getSubtargetImpl(const Function &F) const override; 50 // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget, 51 // subtargets are per-function entities based on the target-specific 52 // attributes of each function. 53 const ARMSubtarget *getSubtargetImpl() const = delete; isLittleEndian()54 bool isLittleEndian() const { return isLittle; } 55 56 TargetTransformInfo getTargetTransformInfo(const Function &F) override; 57 58 // Pass Pipeline Configuration 59 TargetPassConfig *createPassConfig(PassManagerBase &PM) override; 60 getObjFileLowering()61 TargetLoweringObjectFile *getObjFileLowering() const override { 62 return TLOF.get(); 63 } 64 isTargetHardFloat()65 bool isTargetHardFloat() const { 66 return TargetTriple.getEnvironment() == Triple::GNUEABIHF || 67 TargetTriple.getEnvironment() == Triple::MuslEABIHF || 68 TargetTriple.getEnvironment() == Triple::EABIHF || 69 (TargetTriple.isOSBinFormatMachO() && 70 TargetTriple.getSubArch() == Triple::ARMSubArch_v7em) || 71 TargetTriple.isOSWindows() || 72 TargetABI == ARMBaseTargetMachine::ARM_ABI_AAPCS16; 73 } 74 }; 75 76 /// ARM/Thumb little endian target machine. 77 /// 78 class ARMLETargetMachine : public ARMBaseTargetMachine { 79 public: 80 ARMLETargetMachine(const Target &T, const Triple &TT, StringRef CPU, 81 StringRef FS, const TargetOptions &Options, 82 Optional<Reloc::Model> RM, Optional<CodeModel::Model> CM, 83 CodeGenOpt::Level OL, bool JIT); 84 }; 85 86 /// ARM/Thumb big endian target machine. 87 /// 88 class ARMBETargetMachine : public ARMBaseTargetMachine { 89 public: 90 ARMBETargetMachine(const Target &T, const Triple &TT, StringRef CPU, 91 StringRef FS, const TargetOptions &Options, 92 Optional<Reloc::Model> RM, Optional<CodeModel::Model> CM, 93 CodeGenOpt::Level OL, bool JIT); 94 }; 95 96 } // end namespace llvm 97 98 #endif // LLVM_LIB_TARGET_ARM_ARMTARGETMACHINE_H 99