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84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
//===-- 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 Function;
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class Instruction;
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class Metadata;
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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
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