Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/lib/Bitcode/Reader/MetadataLoader.h
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//===-- Bitcode/Reader/MetadataLoader.h - Load Metadatas -------*- C++ -*-====//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This class handles loading Metadatas.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_BITCODE_READER_METADATALOADER_H
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#define LLVM_LIB_BITCODE_READER_METADATALOADER_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/Support/Error.h"
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#include <functional>
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#include <memory>
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namespace llvm {
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class BitcodeReaderValueList;
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class BitstreamCursor;
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class DISubprogram;
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class Error;
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class Function;
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class Instruction;
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class Metadata;
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class MDNode;
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class Module;
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class Type;
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/// Helper class that handles loading Metadatas and keeping them available.
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class MetadataLoader {
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  class MetadataLoaderImpl;
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  std::unique_ptr<MetadataLoaderImpl> Pimpl;
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  Error parseMetadata(bool ModuleLevel);
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public:
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  ~MetadataLoader();
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  MetadataLoader(BitstreamCursor &Stream, Module &TheModule,
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                 BitcodeReaderValueList &ValueList, bool IsImporting,
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                 std::function<Type *(unsigned)> getTypeByID);
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  MetadataLoader &operator=(MetadataLoader &&);
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  MetadataLoader(MetadataLoader &&);
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  // Parse a module metadata block
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  Error parseModuleMetadata() { return parseMetadata(true); }
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  // Parse a function metadata block
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  Error parseFunctionMetadata() { return parseMetadata(false); }
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  /// Set the mode to strip TBAA metadata on load.
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  void setStripTBAA(bool StripTBAA = true);
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  /// Return true if the Loader is stripping TBAA metadata.
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  bool isStrippingTBAA();
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  // Return true there are remaining unresolved forward references.
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  bool hasFwdRefs() const;
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  /// Return the given metadata, creating a replaceable forward reference if
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  /// necessary.
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  Metadata *getMetadataFwdRefOrLoad(unsigned Idx);
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  /// Return the DISubprogram metadata for a Function if any, null otherwise.
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  DISubprogram *lookupSubprogramForFunction(Function *F);
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  /// Parse a `METADATA_ATTACHMENT` block for a function.
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  Error parseMetadataAttachment(
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      Function &F, const SmallVectorImpl<Instruction *> &InstructionList);
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  /// Parse a `METADATA_KIND` block for the current module.
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  Error parseMetadataKinds();
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  unsigned size() const;
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  void shrinkTo(unsigned N);
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  /// Perform bitcode upgrades on llvm.dbg.* calls.
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  void upgradeDebugIntrinsics(Function &F);
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};
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}
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#endif // LLVM_LIB_BITCODE_READER_METADATALOADER_H