/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/lib/Bitcode/Reader/MetadataLoader.h
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1 | | //===-- Bitcode/Reader/MetadataLoader.h - Load Metadatas -------*- 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 handles loading Metadatas. |
10 | | // |
11 | | //===----------------------------------------------------------------------===// |
12 | | |
13 | | #ifndef LLVM_LIB_BITCODE_READER_METADATALOADER_H |
14 | | #define LLVM_LIB_BITCODE_READER_METADATALOADER_H |
15 | | |
16 | | #include "llvm/ADT/SmallVector.h" |
17 | | #include "llvm/Support/Error.h" |
18 | | |
19 | | #include <functional> |
20 | | #include <memory> |
21 | | |
22 | | namespace llvm { |
23 | | class BitcodeReaderValueList; |
24 | | class BitstreamCursor; |
25 | | class DISubprogram; |
26 | | class Error; |
27 | | class Function; |
28 | | class Instruction; |
29 | | class Metadata; |
30 | | class MDNode; |
31 | | class Module; |
32 | | class Type; |
33 | | |
34 | | /// Helper class that handles loading Metadatas and keeping them available. |
35 | | class MetadataLoader { |
36 | | class MetadataLoaderImpl; |
37 | | std::unique_ptr<MetadataLoaderImpl> Pimpl; |
38 | | Error parseMetadata(bool ModuleLevel); |
39 | | |
40 | | public: |
41 | | ~MetadataLoader(); |
42 | | MetadataLoader(BitstreamCursor &Stream, Module &TheModule, |
43 | | BitcodeReaderValueList &ValueList, bool IsImporting, |
44 | | std::function<Type *(unsigned)> getTypeByID); |
45 | | MetadataLoader &operator=(MetadataLoader &&); |
46 | | MetadataLoader(MetadataLoader &&); |
47 | | |
48 | | // Parse a module metadata block |
49 | 5.41k | Error parseModuleMetadata() { return parseMetadata(true); } |
50 | | |
51 | | // Parse a function metadata block |
52 | 30.7k | Error parseFunctionMetadata() { return parseMetadata(false); } |
53 | | |
54 | | /// Set the mode to strip TBAA metadata on load. |
55 | | void setStripTBAA(bool StripTBAA = true); |
56 | | |
57 | | /// Return true if the Loader is stripping TBAA metadata. |
58 | | bool isStrippingTBAA(); |
59 | | |
60 | | // Return true there are remaining unresolved forward references. |
61 | | bool hasFwdRefs() const; |
62 | | |
63 | | /// Return the given metadata, creating a replaceable forward reference if |
64 | | /// necessary. |
65 | | Metadata *getMetadataFwdRefOrLoad(unsigned Idx); |
66 | | |
67 | | /// Return the DISubprogram metadata for a Function if any, null otherwise. |
68 | | DISubprogram *lookupSubprogramForFunction(Function *F); |
69 | | |
70 | | /// Parse a `METADATA_ATTACHMENT` block for a function. |
71 | | Error parseMetadataAttachment( |
72 | | Function &F, const SmallVectorImpl<Instruction *> &InstructionList); |
73 | | |
74 | | /// Parse a `METADATA_KIND` block for the current module. |
75 | | Error parseMetadataKinds(); |
76 | | |
77 | | unsigned size() const; |
78 | | void shrinkTo(unsigned N); |
79 | | |
80 | | /// Perform bitcode upgrades on llvm.dbg.* calls. |
81 | | void upgradeDebugIntrinsics(Function &F); |
82 | | }; |
83 | | } |
84 | | |
85 | | #endif // LLVM_LIB_BITCODE_READER_METADATALOADER_H |