llvm/lib/Target/BPF/BPFCORE.h

   1 //===- BPFCORE.h - Common info for Compile-Once Run-EveryWhere  -*- 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 #ifndef LLVM_LIB_TARGET_BPF_BPFCORE_H
  10 #define LLVM_LIB_TARGET_BPF_BPFCORE_H
  11
  12 #include "llvm/ADT/StringRef.h"
  13 #include "llvm/IR/Instructions.h"
  14
  15 namespace llvm {
  16
  17 class BasicBlock;
  18 class Instruction;
  19 class Module;
  20
  21 class BPFCoreSharedInfo {
  22 public:
  23   enum BTFTypeIdFlag : uint32_t {
  24     BTF_TYPE_ID_LOCAL_RELOC = 0,
  25     BTF_TYPE_ID_REMOTE_RELOC,
  26
  27     MAX_BTF_TYPE_ID_FLAG,
  28   };
  29
  30   enum PreserveTypeInfo : uint32_t {
  31     PRESERVE_TYPE_INFO_EXISTENCE = 0,
  32     PRESERVE_TYPE_INFO_SIZE,
  33     PRESERVE_TYPE_INFO_MATCH,
  34
  35     MAX_PRESERVE_TYPE_INFO_FLAG,
  36   };
  37
  38   enum PreserveEnumValue : uint32_t {
  39     PRESERVE_ENUM_VALUE_EXISTENCE = 0,
  40     PRESERVE_ENUM_VALUE,
  41
  42     MAX_PRESERVE_ENUM_VALUE_FLAG,
  43   };
  44
  45   /// The attribute attached to globals representing a field access
  46   static constexpr StringRef AmaAttr = "btf_ama";
  47   /// The attribute attached to globals representing a type id
  48   static constexpr StringRef TypeIdAttr = "btf_type_id";
  49
  50   /// llvm.bpf.passthrough builtin seq number
  51   static uint32_t SeqNum;
  52
  53   /// Insert a bpf passthrough builtin function.
  54   static Instruction *insertPassThrough(Module *M, BasicBlock *BB,
  55                                         Instruction *Input,
  56                                         Instruction *Before);
  57   static void removeArrayAccessCall(CallInst *Call);
  58   static void removeStructAccessCall(CallInst *Call);
  59   static void removeUnionAccessCall(CallInst *Call);
  60 };
  61
  62 } // namespace llvm
  63
  64 #endif