clang/lib/Basic/Targets/BPF.h

   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
  21 namespace clang {
  22 namespace targets {
  23
  24 class LLVM_LIBRARY_VISIBILITY BPFTargetInfo : public TargetInfo {
  25   static const Builtin::Info BuiltinInfo[];
  26   bool HasAlu32 = false;
  27
  28 public:
  29   BPFTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
  30       : TargetInfo(Triple) {
  31     LongWidth = LongAlign = PointerWidth = PointerAlign = 64;
  32     SizeType = UnsignedLong;
  33     PtrDiffType = SignedLong;
  34     IntPtrType = SignedLong;
  35     IntMaxType = SignedLong;
  36     Int64Type = SignedLong;
  37     RegParmMax = 5;
  38     if (Triple.getArch() == llvm::Triple::bpfeb) {
  39       resetDataLayout("E-m:e-p:64:64-i64:64-i128:128-n32:64-S128");
  40     } else {
  41       resetDataLayout("e-m:e-p:64:64-i64:64-i128:128-n32:64-S128");
  42     }
  43     MaxAtomicPromoteWidth = 64;
  44     MaxAtomicInlineWidth = 64;
  45     TLSSupported = false;
  46   }
  47
  48   void getTargetDefines(const LangOptions &Opts,
  49                         MacroBuilder &Builder) const override;
  50
  51   bool hasFeature(StringRef Feature) const override {
  52     return Feature == "bpf" || Feature == "alu32" || Feature == "dwarfris";
  53   }
  54
  55   void setFeatureEnabled(llvm::StringMap<bool> &Features, StringRef Name,
  56                          bool Enabled) const override {
  57     Features[Name] = Enabled;
  58   }
  59   bool handleTargetFeatures(std::vector<std::string> &Features,
  60                             DiagnosticsEngine &Diags) override;
  61
  62   ArrayRef<Builtin::Info> getTargetBuiltins() const override;
  63
  64   const char *getClobbers() const override { return ""; }
  65
  66   BuiltinVaListKind getBuiltinVaListKind() const override {
  67     return TargetInfo::VoidPtrBuiltinVaList;
  68   }
  69
  70   bool isValidGCCRegisterName(StringRef Name) const override { return true; }
  71   ArrayRef<const char *> getGCCRegNames() const override { return None; }
  72
  73   bool validateAsmConstraint(const char *&Name,
  74                              TargetInfo::ConstraintInfo &Info) const override {
  75     switch (*Name) {
  76     default:
  77       break;
  78     case 'w':
  79       if (HasAlu32) {
  80         Info.setAllowsRegister();
  81       }
  82       break;
  83     }
  84     return true;
  85   }
  86
  87   ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override {
  88     return None;
  89   }
  90
  91   bool allowDebugInfoForExternalRef() const override { return true; }
  92
  93   CallingConvCheckResult checkCallingConvention(CallingConv CC) const override {
  94     switch (CC) {
  95     default:
  96       return CCCR_Warning;
  97     case CC_C:
  98     case CC_OpenCLKernel:
  99       return CCCR_OK;
 100     }
 101   }
 102
 103   bool isValidCPUName(StringRef Name) const override;
 104
 105   void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
 106
 107   bool setCPU(const std::string &Name) override {
 108     if (Name == "v3") {
 109       HasAlu32 = true;
 110     }
 111
 112     StringRef CPUName(Name);
 113     return isValidCPUName(CPUName);
 114   }
 115 };
 116 } // namespace targets
 117 } // namespace clang
 118 #endif // LLVM_CLANG_LIB_BASIC_TARGETS_BPF_H