ef27db879c
Summary: I'm planning on changing the way we load metadata to enable laziness. I'm getting lost in this gigantic files, and gigantic class that is the bitcode reader. This is a first toward splitting it in a few coarse components that are more easily understandable. Reviewers: pcc, tejohnson Subscribers: mgorny, llvm-commits, dexonsmith Differential Revision: https://reviews.llvm.org/D27646 llvm-svn: 289461
80 lines
2.3 KiB
C++
80 lines
2.3 KiB
C++
//===-- Bitcode/Reader/MetadataLoader.h - Load Metadatas -------*- C++ -*-====//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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,
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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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// 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 *getMetadataFwdRef(unsigned Idx);
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MDNode *getMDNodeFwdRefOrNull(unsigned Idx);
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/// Return the DISubprogra 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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};
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}
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#endif // LLVM_LIB_BITCODE_READER_METADATALOADER_H
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