1 //===-- PPCTargetMachine.h - Define TargetMachine for PowerPC ---*- 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 PowerPC specific subclass of TargetMachine. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_LIB_TARGET_POWERPC_PPCTARGETMACHINE_H 14 #define LLVM_LIB_TARGET_POWERPC_PPCTARGETMACHINE_H 15 16 #include "PPCInstrInfo.h" 17 #include "PPCSubtarget.h" 18 #include "llvm/IR/DataLayout.h" 19 #include "llvm/Target/TargetMachine.h" 20 21 namespace llvm { 22 23 /// Common code between 32-bit and 64-bit PowerPC targets. 24 /// 25 class PPCTargetMachine final : public LLVMTargetMachine { 26 public: 27 enum PPCABI { PPC_ABI_UNKNOWN, PPC_ABI_ELFv1, PPC_ABI_ELFv2 }; 28 enum Endian { NOT_DETECTED, LITTLE, BIG }; 29 30 private: 31 std::unique_ptr<TargetLoweringObjectFile> TLOF; 32 PPCABI TargetABI; 33 Endian Endianness = Endian::NOT_DETECTED; 34 35 mutable StringMap<std::unique_ptr<PPCSubtarget>> SubtargetMap; 36 37 public: 38 PPCTargetMachine(const Target &T, const Triple &TT, StringRef CPU, 39 StringRef FS, const TargetOptions &Options, 40 Optional<Reloc::Model> RM, Optional<CodeModel::Model> CM, 41 CodeGenOpt::Level OL, bool JIT); 42 43 ~PPCTargetMachine() override; 44 45 const PPCSubtarget *getSubtargetImpl(const Function &F) const override; 46 // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget, 47 // subtargets are per-function entities based on the target-specific 48 // attributes of each function. 49 const PPCSubtarget *getSubtargetImpl() const = delete; 50 51 // Pass Pipeline Configuration 52 TargetPassConfig *createPassConfig(PassManagerBase &PM) override; 53 54 TargetTransformInfo getTargetTransformInfo(const Function &F) override; 55 56 TargetLoweringObjectFile *getObjFileLowering() const override { 57 return TLOF.get(); 58 } 59 bool isELFv2ABI() const { return TargetABI == PPC_ABI_ELFv2; } 60 bool isPPC64() const { 61 const Triple &TT = getTargetTriple(); 62 return (TT.getArch() == Triple::ppc64 || TT.getArch() == Triple::ppc64le); 63 }; 64 65 bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override { 66 // Addrspacecasts are always noops. 67 return true; 68 } 69 70 bool isLittleEndian() const; 71 }; 72 } // end namespace llvm 73 74 #endif 75