Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/CodeGen/GCMetadataPrinter.h
Line
Count
Source (jump to first uncovered line)
1
//===- llvm/CodeGen/GCMetadataPrinter.h - Prints asm GC tables --*- 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
// The abstract base class GCMetadataPrinter supports writing GC metadata tables
10
// as assembly code. This is a separate class from GCStrategy in order to allow
11
// users of the LLVM JIT to avoid linking with the AsmWriter.
12
//
13
// Subclasses of GCMetadataPrinter must be registered using the
14
// GCMetadataPrinterRegistry. This is separate from the GCStrategy itself
15
// because these subclasses are logically plugins for the AsmWriter.
16
//
17
//===----------------------------------------------------------------------===//
18
19
#ifndef LLVM_CODEGEN_GCMETADATAPRINTER_H
20
#define LLVM_CODEGEN_GCMETADATAPRINTER_H
21
22
#include "llvm/Support/Registry.h"
23
24
namespace llvm {
25
26
class AsmPrinter;
27
class GCMetadataPrinter;
28
class GCModuleInfo;
29
class GCStrategy;
30
class Module;
31
class StackMaps;
32
33
/// GCMetadataPrinterRegistry - The GC assembly printer registry uses all the
34
/// defaults from Registry.
35
using GCMetadataPrinterRegistry = Registry<GCMetadataPrinter>;
36
37
/// GCMetadataPrinter - Emits GC metadata as assembly code.  Instances are
38
/// created, managed, and owned by the AsmPrinter.
39
class GCMetadataPrinter {
40
private:
41
  friend class AsmPrinter;
42
43
  GCStrategy *S;
44
45
protected:
46
  // May only be subclassed.
47
  GCMetadataPrinter();
48
49
public:
50
  GCMetadataPrinter(const GCMetadataPrinter &) = delete;
51
  GCMetadataPrinter &operator=(const GCMetadataPrinter &) = delete;
52
  virtual ~GCMetadataPrinter();
53
54
9
  GCStrategy &getStrategy() { return *S; }
55
56
  /// Called before the assembly for the module is generated by
57
  /// the AsmPrinter (but after target specific hooks.)
58
3
  virtual void beginAssembly(Module &M, GCModuleInfo &Info, AsmPrinter &AP) {}
59
60
  /// Called after the assembly for the module is generated by
61
  /// the AsmPrinter (but before target specific hooks)
62
0
  virtual void finishAssembly(Module &M, GCModuleInfo &Info, AsmPrinter &AP) {}
63
64
  /// Called when the stack maps are generated. Return true if
65
  /// stack maps with a custom format are generated. Otherwise
66
  /// returns false and the default format will be used.
67
6
  virtual bool emitStackMaps(StackMaps &SM, AsmPrinter &AP) { return false; }
68
};
69
70
} // end namespace llvm
71
72
#endif // LLVM_CODEGEN_GCMETADATAPRINTER_H