LLVM  9.0.0svn
ModuleSymbolTable.h
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1 //===- ModuleSymbolTable.h - symbol table for in-memory IR ------*- 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 class represents a symbol table built from in-memory IR. It provides
10 // access to GlobalValues and should only be used if such access is required
11 // (e.g. in the LTO implementation).
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_OBJECT_MODULESYMBOLTABLE_H
16 #define LLVM_OBJECT_MODULESYMBOLTABLE_H
17 
18 #include "llvm/ADT/ArrayRef.h"
19 #include "llvm/ADT/PointerUnion.h"
20 #include "llvm/IR/Mangler.h"
22 #include "llvm/Support/Allocator.h"
23 #include <cstdint>
24 #include <string>
25 #include <utility>
26 #include <vector>
27 
28 namespace llvm {
29 
30 class GlobalValue;
31 
33 public:
34  using AsmSymbol = std::pair<std::string, uint32_t>;
36 
37 private:
38  Module *FirstMod = nullptr;
39 
41  std::vector<Symbol> SymTab;
42  Mangler Mang;
43 
44 public:
45  ArrayRef<Symbol> symbols() const { return SymTab; }
46  void addModule(Module *M);
47 
48  void printSymbolName(raw_ostream &OS, Symbol S) const;
50 
51  /// Parse inline ASM and collect the symbols that are defined or referenced in
52  /// the current module.
53  ///
54  /// For each found symbol, call \p AsmSymbol with the name of the symbol found
55  /// and the associated flags.
56  static void CollectAsmSymbols(
57  const Module &M,
59 
60  /// Parse inline ASM and collect the symvers directives that are defined in
61  /// the current module.
62  ///
63  /// For each found symbol, call \p AsmSymver with the name of the symbol and
64  /// its alias.
65  static void
66  CollectAsmSymvers(const Module &M,
67  function_ref<void(StringRef, StringRef)> AsmSymver);
68 };
69 
70 } // end namespace llvm
71 
72 #endif // LLVM_OBJECT_MODULESYMBOLTABLE_H
uint32_t getSymbolFlags(Symbol S) const
This class represents lattice values for constants.
Definition: AllocatorList.h:23
A Module instance is used to store all the information related to an LLVM module. ...
Definition: Module.h:65
An efficient, type-erasing, non-owning reference to a callable.
Definition: STLExtras.h:116
This file defines the MallocAllocator and BumpPtrAllocator interfaces.
ArrayRef< Symbol > symbols() const
static void CollectAsmSymbols(const Module &M, function_ref< void(StringRef, object::BasicSymbolRef::Flags)> AsmSymbol)
Parse inline ASM and collect the symbols that are defined or referenced in the current module...
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:32
std::pair< std::string, uint32_t > AsmSymbol
static void CollectAsmSymvers(const Module &M, function_ref< void(StringRef, StringRef)> AsmSymver)
Parse inline ASM and collect the symvers directives that are defined in the current module...
void printSymbolName(raw_ostream &OS, Symbol S) const
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:45
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
A discriminated union of two or more pointer types, with the discriminator in the low bit of the poin...
Definition: PointerUnion.h:163