1//===--- BPF.h - Declare BPF target feature support -------------*- 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 BPF TargetInfo objects.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_BPF_H
14#define LLVM_CLANG_LIB_BASIC_TARGETS_BPF_H
15
16#include "clang/Basic/TargetInfo.h"
17#include "clang/Basic/TargetOptions.h"
18#include "llvm/ADT/Triple.h"
19#include "llvm/Support/Compiler.h"
20
21namespace clang {
22namespace targets {
23
24class LLVM_LIBRARY_VISIBILITY BPFTargetInfo : public TargetInfo {
25  static const Builtin::Info BuiltinInfo[];
26
27public:
28  BPFTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
29      : TargetInfo(Triple) {
30    LongWidth = LongAlign = PointerWidth = PointerAlign = 64;
31    SizeType = UnsignedLong;
32    PtrDiffType = SignedLong;
33    IntPtrType = SignedLong;
34    IntMaxType = SignedLong;
35    Int64Type = SignedLong;
36    RegParmMax = 5;
37    if (Triple.getArch() == llvm::Triple::bpfeb) {
38      resetDataLayout("E-m:e-p:64:64-i64:64-n32:64-S128");
39    } else {
40      resetDataLayout("e-m:e-p:64:64-i64:64-n32:64-S128");
41    }
42    MaxAtomicPromoteWidth = 64;
43    MaxAtomicInlineWidth = 64;
44    TLSSupported = false;
45  }
46
47  void getTargetDefines(const LangOptions &Opts,
48                        MacroBuilder &Builder) const override;
49
50  bool hasFeature(StringRef Feature) const override {
51    return Feature == "bpf" || Feature == "alu32" || Feature == "dwarfris";
52  }
53
54  void setFeatureEnabled(llvm::StringMap<bool> &Features, StringRef Name,
55                         bool Enabled) const override {
56    Features[Name] = Enabled;
57  }
58
59  ArrayRef<Builtin::Info> getTargetBuiltins() const override;
60
61  const char *getClobbers() const override { return ""; }
62
63  BuiltinVaListKind getBuiltinVaListKind() const override {
64    return TargetInfo::VoidPtrBuiltinVaList;
65  }
66
67  bool isValidGCCRegisterName(StringRef Name) const override { return true; }
68  ArrayRef<const char *> getGCCRegNames() const override { return None; }
69
70  bool validateAsmConstraint(const char *&Name,
71                             TargetInfo::ConstraintInfo &info) const override {
72    return true;
73  }
74
75  ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override {
76    return None;
77  }
78
79  bool allowDebugInfoForExternalVar() const override { return true; }
80
81  CallingConvCheckResult checkCallingConvention(CallingConv CC) const override {
82    switch (CC) {
83    default:
84      return CCCR_Warning;
85    case CC_C:
86    case CC_OpenCLKernel:
87      return CCCR_OK;
88    }
89  }
90
91  bool isValidCPUName(StringRef Name) const override;
92
93  void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
94
95  bool setCPU(const std::string &Name) override {
96    StringRef CPUName(Name);
97    return isValidCPUName(CPUName);
98  }
99};
100} // namespace targets
101} // namespace clang
102#endif // LLVM_CLANG_LIB_BASIC_TARGETS_BPF_H
103