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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
//===- IRMover.h ------------------------------------------------*- 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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#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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