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a78a4abcc4
This reverts commit r325686. There was a misunderstanding and this has not been approved yet. llvm-svn: 325715
90 lines
2.9 KiB
C++
90 lines
2.9 KiB
C++
//===- IRMover.h ------------------------------------------------*- 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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#ifndef LLVM_LINKER_IRMOVER_H
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#define LLVM_LINKER_IRMOVER_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/DenseSet.h"
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#include <functional>
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namespace llvm {
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class Error;
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class GlobalValue;
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class Metadata;
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class Module;
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class StructType;
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class TrackingMDRef;
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class Type;
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class IRMover {
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struct StructTypeKeyInfo {
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struct KeyTy {
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ArrayRef<Type *> ETypes;
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bool IsPacked;
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KeyTy(ArrayRef<Type *> E, bool P);
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KeyTy(const StructType *ST);
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bool operator==(const KeyTy &that) const;
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bool operator!=(const KeyTy &that) const;
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};
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static StructType *getEmptyKey();
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static StructType *getTombstoneKey();
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static unsigned getHashValue(const KeyTy &Key);
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static unsigned getHashValue(const StructType *ST);
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static bool isEqual(const KeyTy &LHS, const StructType *RHS);
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static bool isEqual(const StructType *LHS, const StructType *RHS);
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};
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/// Type of the Metadata map in \a ValueToValueMapTy.
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typedef DenseMap<const Metadata *, TrackingMDRef> MDMapT;
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public:
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class IdentifiedStructTypeSet {
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// The set of opaque types is the composite module.
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DenseSet<StructType *> OpaqueStructTypes;
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// The set of identified but non opaque structures in the composite module.
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DenseSet<StructType *, StructTypeKeyInfo> NonOpaqueStructTypes;
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public:
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void addNonOpaque(StructType *Ty);
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void switchToNonOpaque(StructType *Ty);
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void addOpaque(StructType *Ty);
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StructType *findNonOpaque(ArrayRef<Type *> ETypes, bool IsPacked);
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bool hasType(StructType *Ty);
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};
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IRMover(Module &M);
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typedef std::function<void(GlobalValue &)> ValueAdder;
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/// Move in the provide values in \p ValuesToLink from \p Src.
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///
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/// - \p AddLazyFor is a call back that the IRMover will call when a global
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/// value is referenced by one of the ValuesToLink (transitively) but was
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/// not present in ValuesToLink. The GlobalValue and a ValueAdder callback
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/// are passed as an argument, and the callback is expected to be called
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/// if the GlobalValue needs to be added to the \p ValuesToLink and linked.
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/// - \p IsPerformingImport is true when this IR link is to perform ThinLTO
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/// function importing from Src.
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Error move(std::unique_ptr<Module> Src, ArrayRef<GlobalValue *> ValuesToLink,
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std::function<void(GlobalValue &GV, ValueAdder Add)> AddLazyFor,
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bool IsPerformingImport);
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Module &getModule() { return Composite; }
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private:
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Module &Composite;
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IdentifiedStructTypeSet IdentifiedStructTypes;
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MDMapT SharedMDs; ///< A Metadata map to use for all calls to \a move().
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};
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} // End llvm namespace
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#endif
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