llvm/lib/Target/PowerPC/PPCTargetMachine.h

   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/CodeGen/CodeGenTargetMachineImpl.h"
  19 #include "llvm/IR/DataLayout.h"
  20 #include <optional>
  21
  22 namespace llvm {
  23
  24 /// Common code between 32-bit and 64-bit PowerPC targets.
  25 ///
  26 class PPCTargetMachine final : public CodeGenTargetMachineImpl {
  27 public:
  28   enum PPCABI { PPC_ABI_UNKNOWN, PPC_ABI_ELFv1, PPC_ABI_ELFv2 };
  29   enum Endian { NOT_DETECTED, LITTLE, BIG };
  30
  31 private:
  32   std::unique_ptr<TargetLoweringObjectFile> TLOF;
  33   PPCABI TargetABI;
  34   Endian Endianness = Endian::NOT_DETECTED;
  35   mutable bool HasGlibcHWCAPAccess = false;
  36
  37   mutable StringMap<std::unique_ptr<PPCSubtarget>> SubtargetMap;
  38
  39 public:
  40   PPCTargetMachine(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, CodeGenOptLevel OL,
  44                    bool JIT);
  45
  46   ~PPCTargetMachine() override;
  47
  48   const PPCSubtarget *getSubtargetImpl(const Function &F) const override;
  49   // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
  50   // subtargets are per-function entities based on the target-specific
  51   // attributes of each function.
  52   const PPCSubtarget *getSubtargetImpl() const = delete;
  53
  54   // Pass Pipeline Configuration
  55   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
  56
  57   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
  58
  59   TargetLoweringObjectFile *getObjFileLowering() const override {
  60     return TLOF.get();
  61   }
  62
  63   MachineFunctionInfo *
  64   createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
  65                             const TargetSubtargetInfo *STI) const override;
  66
  67   bool isELFv2ABI() const { return TargetABI == PPC_ABI_ELFv2; }
  68   bool hasGlibcHWCAPAccess() const { return HasGlibcHWCAPAccess; }
  69   void setGlibcHWCAPAccess(bool Val = true) const { HasGlibcHWCAPAccess = Val; }
  70   bool isPPC64() const {
  71     const Triple &TT = getTargetTriple();
  72     return (TT.getArch() == Triple::ppc64 || TT.getArch() == Triple::ppc64le);
  73   };
  74
  75   bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
  76     // Addrspacecasts are always noops.
  77     return true;
  78   }
  79
  80   bool isLittleEndian() const;
  81
  82   int unqualifiedInlineAsmVariant() const override { return 1; }
  83 };
  84 } // end namespace llvm
  85
  86 #endif