100 lines
3.5 KiB
C++
100 lines
3.5 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/DenseMap.h"
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#include "llvm/ADT/DenseSet.h"
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#include "llvm/ADT/FunctionExtras.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/Support/Compiler.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 MDNode;
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class NamedMDNode;
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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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LLVM_ABI KeyTy(ArrayRef<Type *> E, bool P);
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LLVM_ABI KeyTy(const StructType *ST);
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LLVM_ABI bool operator==(const KeyTy &that) const;
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LLVM_ABI bool operator!=(const KeyTy &that) const;
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};
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LLVM_ABI static unsigned getHashValue(const KeyTy &Key);
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LLVM_ABI static unsigned getHashValue(const StructType *ST);
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LLVM_ABI static bool isEqual(const KeyTy &LHS, const StructType *RHS);
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LLVM_ABI 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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LLVM_ABI void addNonOpaque(StructType *Ty);
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LLVM_ABI void switchToNonOpaque(StructType *Ty);
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LLVM_ABI void addOpaque(StructType *Ty);
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LLVM_ABI StructType *findNonOpaque(ArrayRef<Type *> ETypes, bool IsPacked);
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LLVM_ABI bool hasType(StructType *Ty);
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};
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LLVM_ABI IRMover(Module &M);
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typedef std::function<void(GlobalValue &)> ValueAdder;
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using LazyCallback =
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llvm::unique_function<void(GlobalValue &GV, ValueAdder Add)>;
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using NamedMDNodesT =
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DenseMap<const NamedMDNode *, SmallPtrSet<const MDNode *, 8>>;
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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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/// Pass nullptr if there's no work to be done in such cases.
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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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LLVM_ABI Error move(std::unique_ptr<Module> Src,
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ArrayRef<GlobalValue *> ValuesToLink,
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LazyCallback AddLazyFor, 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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NamedMDNodesT NamedMDNodes; ///< Cache for IRMover::linkNamedMDNodes().
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};
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} // End llvm namespace
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#endif
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