lib/Basic/Targets/BPF.h

//===--- BPF.h - Declare BPF target feature support -------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares BPF TargetInfo objects.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_BPF_H
#define LLVM_CLANG_LIB_BASIC_TARGETS_BPF_H

#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/TargetOptions.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/Compiler.h"

namespace clang {
namespace targets {

class LLVM_LIBRARY_VISIBILITY BPFTargetInfo : public TargetInfo {
public:
  BPFTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
      : TargetInfo(Triple) {
    LongWidth = LongAlign = PointerWidth = PointerAlign = 64;
    SizeType = UnsignedLong;
    PtrDiffType = SignedLong;
    IntPtrType = SignedLong;
    IntMaxType = SignedLong;
    Int64Type = SignedLong;
    RegParmMax = 5;
    if (Triple.getArch() == llvm::Triple::bpfeb) {
      resetDataLayout("E-m:e-p:64:64-i64:64-n32:64-S128");
    } else {
      resetDataLayout("e-m:e-p:64:64-i64:64-n32:64-S128");
    }
    MaxAtomicPromoteWidth = 64;
    MaxAtomicInlineWidth = 64;
    TLSSupported = false;
  }

  void getTargetDefines(const LangOptions &Opts,
                        MacroBuilder &Builder) const override;

  bool hasFeature(StringRef Feature) const override { return Feature == "bpf"; }

  ArrayRef<Builtin::Info> getTargetBuiltins() const override { return None; }

  const char *getClobbers() const override { return ""; }

  BuiltinVaListKind getBuiltinVaListKind() const override {
    return TargetInfo::VoidPtrBuiltinVaList;
  }

  ArrayRef<const char *> getGCCRegNames() const override { return None; }

  bool validateAsmConstraint(const char *&Name,
                             TargetInfo::ConstraintInfo &info) const override {
    return true;
  }

  ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override {
    return None;
  }

  CallingConvCheckResult checkCallingConvention(CallingConv CC) const override {
    switch (CC) {
    default:
      return CCCR_Warning;
    case CC_C:
    case CC_OpenCLKernel:
      return CCCR_OK;
    }
  }

  bool isValidCPUName(StringRef Name) const override {
    if (Name == "generic" || Name == "v1" ||
        Name == "v2" || Name == "probe")
      return true;
    return false;
  }

  bool setCPU(const std::string &Name) override {
    StringRef CPUName(Name);
    return isValidCPUName(CPUName);
  }
};
} // namespace targets
} // namespace clang
#endif // LLVM_CLANG_LIB_BASIC_TARGETS_BPF_H