LLVM  10.0.0svn
MCWasmObjectWriter.h
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1 //===-- llvm/MC/MCWasmObjectWriter.h - Wasm Object Writer -------*- 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_MC_MCWASMOBJECTWRITER_H
10 #define LLVM_MC_MCWASMOBJECTWRITER_H
11 
12 #include "llvm/MC/MCObjectWriter.h"
13 #include <memory>
14 
15 namespace llvm {
16 
17 class MCFixup;
18 class MCValue;
19 class raw_pwrite_stream;
20 
22  const unsigned Is64Bit : 1;
23  const unsigned IsEmscripten : 1;
24 
25 protected:
26  explicit MCWasmObjectTargetWriter(bool Is64Bit_, bool IsEmscripten);
27 
28 public:
29  virtual ~MCWasmObjectTargetWriter();
30 
31  virtual Triple::ObjectFormatType getFormat() const { return Triple::Wasm; }
32  static bool classof(const MCObjectTargetWriter *W) {
33  return W->getFormat() == Triple::Wasm;
34  }
35 
36  virtual unsigned getRelocType(const MCValue &Target,
37  const MCFixup &Fixup) const = 0;
38 
39  /// \name Accessors
40  /// @{
41  bool is64Bit() const { return Is64Bit; }
42  bool isEmscripten() const { return IsEmscripten; }
43  /// @}
44 };
45 
46 /// Construct a new Wasm writer instance.
47 ///
48 /// \param MOTW - The target specific Wasm writer subclass.
49 /// \param OS - The stream to write to.
50 /// \returns The constructed object writer.
51 std::unique_ptr<MCObjectWriter>
52 createWasmObjectWriter(std::unique_ptr<MCWasmObjectTargetWriter> MOTW,
53  raw_pwrite_stream &OS);
54 
55 } // namespace llvm
56 
57 #endif
This class represents lattice values for constants.
Definition: AllocatorList.h:23
This represents an "assembler immediate".
Definition: MCValue.h:39
virtual unsigned getRelocType(const MCValue &Target, const MCFixup &Fixup) const =0
Encode information on a single operation to perform on a byte sequence (e.g., an encoded instruction)...
Definition: MCFixup.h:77
virtual Triple::ObjectFormatType getFormat() const =0
virtual Triple::ObjectFormatType getFormat() const
static bool classof(const MCObjectTargetWriter *W)
std::unique_ptr< MCObjectWriter > createWasmObjectWriter(std::unique_ptr< MCWasmObjectTargetWriter > MOTW, raw_pwrite_stream &OS)
Construct a new Wasm writer instance.
PowerPC TLS Dynamic Call Fixup
Target - Wrapper for Target specific information.
MCWasmObjectTargetWriter(bool Is64Bit_, bool IsEmscripten)
Base class for classes that define behaviour that is specific to both the target and the object forma...
An abstract base class for streams implementations that also support a pwrite operation.
Definition: raw_ostream.h:359
ObjectFormatType
Definition: Triple.h:221