1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
//===-- Bitcode/Reader/MetadataLoader.h - Load Metadatas -------*- C++ -*-====//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This class handles loading Metadatas.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_BITCODE_READER_METADATALOADER_H
#define LLVM_LIB_BITCODE_READER_METADATALOADER_H
#include "llvm/Support/Error.h"
#include <functional>
#include <memory>
namespace llvm {
class BitcodeReaderValueList;
class BitstreamCursor;
class DISubprogram;
class Function;
class Instruction;
class Metadata;
class Module;
class Type;
template <typename T> class ArrayRef;
typedef std::function<Type *(unsigned)> GetTypeByIDTy;
typedef std::function<unsigned(unsigned, unsigned)> GetContainedTypeIDTy;
typedef std::function<void(Metadata **, unsigned, GetTypeByIDTy,
GetContainedTypeIDTy)>
MDTypeCallbackTy;
struct MetadataLoaderCallbacks {
GetTypeByIDTy GetTypeByID;
GetContainedTypeIDTy GetContainedTypeID;
std::optional<MDTypeCallbackTy> MDType;
};
/// Helper class that handles loading Metadatas and keeping them available.
class MetadataLoader {
class MetadataLoaderImpl;
std::unique_ptr<MetadataLoaderImpl> Pimpl;
Error parseMetadata(bool ModuleLevel);
public:
~MetadataLoader();
MetadataLoader(BitstreamCursor &Stream, Module &TheModule,
BitcodeReaderValueList &ValueList, bool IsImporting,
MetadataLoaderCallbacks Callbacks);
MetadataLoader &operator=(MetadataLoader &&);
MetadataLoader(MetadataLoader &&);
// Parse a module metadata block
Error parseModuleMetadata() { return parseMetadata(true); }
// Parse a function metadata block
Error parseFunctionMetadata() { return parseMetadata(false); }
/// Set the mode to strip TBAA metadata on load.
void setStripTBAA(bool StripTBAA = true);
/// Return true if the Loader is stripping TBAA metadata.
bool isStrippingTBAA();
// Return true there are remaining unresolved forward references.
bool hasFwdRefs() const;
/// Return the given metadata, creating a replaceable forward reference if
/// necessary.
Metadata *getMetadataFwdRefOrLoad(unsigned Idx);
/// Return the DISubprogram metadata for a Function if any, null otherwise.
DISubprogram *lookupSubprogramForFunction(Function *F);
/// Parse a `METADATA_ATTACHMENT` block for a function.
Error parseMetadataAttachment(Function &F,
ArrayRef<Instruction *> InstructionList);
/// Parse a `METADATA_KIND` block for the current module.
Error parseMetadataKinds();
unsigned size() const;
void shrinkTo(unsigned N);
/// Perform bitcode upgrades on llvm.dbg.* calls.
void upgradeDebugIntrinsics(Function &F);
};
}
#endif // LLVM_LIB_BITCODE_READER_METADATALOADER_H
|
