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33ed2ef4ff
Instead of reusing the name `MapValue()` when mapping `Metadata`, use `MapMetadata()`. The old name doesn't make much sense after the `Metadata`/`Value` split. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224566 91177308-0d34-0410-b5e6-96231b3b80d8
102 lines
4.0 KiB
C++
102 lines
4.0 KiB
C++
//===- ValueMapper.h - Remapping for constants and metadata -----*- 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 file defines the MapValue interface which is used by various parts of
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// the Transforms/Utils library to implement cloning and linking facilities.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_UTILS_VALUEMAPPER_H
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#define LLVM_TRANSFORMS_UTILS_VALUEMAPPER_H
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#include "llvm/IR/ValueMap.h"
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namespace llvm {
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class Value;
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class Instruction;
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typedef ValueMap<const Value *, WeakVH> ValueToValueMapTy;
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/// ValueMapTypeRemapper - This is a class that can be implemented by clients
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/// to remap types when cloning constants and instructions.
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class ValueMapTypeRemapper {
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virtual void anchor(); // Out of line method.
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public:
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virtual ~ValueMapTypeRemapper() {}
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/// remapType - The client should implement this method if they want to
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/// remap types while mapping values.
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virtual Type *remapType(Type *SrcTy) = 0;
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};
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/// ValueMaterializer - This is a class that can be implemented by clients
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/// to materialize Values on demand.
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class ValueMaterializer {
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virtual void anchor(); // Out of line method.
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public:
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virtual ~ValueMaterializer() {}
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/// materializeValueFor - The client should implement this method if they
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/// want to generate a mapped Value on demand. For example, if linking
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/// lazily.
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virtual Value *materializeValueFor(Value *V) = 0;
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};
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/// RemapFlags - These are flags that the value mapping APIs allow.
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enum RemapFlags {
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RF_None = 0,
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/// RF_NoModuleLevelChanges - If this flag is set, the remapper knows that
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/// only local values within a function (such as an instruction or argument)
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/// are mapped, not global values like functions and global metadata.
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RF_NoModuleLevelChanges = 1,
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/// RF_IgnoreMissingEntries - If this flag is set, the remapper ignores
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/// entries that are not in the value map. If it is unset, it aborts if an
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/// operand is asked to be remapped which doesn't exist in the mapping.
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RF_IgnoreMissingEntries = 2
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};
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static inline RemapFlags operator|(RemapFlags LHS, RemapFlags RHS) {
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return RemapFlags(unsigned(LHS)|unsigned(RHS));
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}
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Value *MapValue(const Value *V, ValueToValueMapTy &VM,
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RemapFlags Flags = RF_None,
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ValueMapTypeRemapper *TypeMapper = nullptr,
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ValueMaterializer *Materializer = nullptr);
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Metadata *MapMetadata(const Metadata *MD, ValueToValueMapTy &VM,
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RemapFlags Flags = RF_None,
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ValueMapTypeRemapper *TypeMapper = nullptr,
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ValueMaterializer *Materializer = nullptr);
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/// MapMetadata - provide versions that preserve type safety for MDNodes.
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MDNode *MapMetadata(const MDNode *MD, ValueToValueMapTy &VM,
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RemapFlags Flags = RF_None,
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ValueMapTypeRemapper *TypeMapper = nullptr,
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ValueMaterializer *Materializer = nullptr);
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void RemapInstruction(Instruction *I, ValueToValueMapTy &VM,
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RemapFlags Flags = RF_None,
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ValueMapTypeRemapper *TypeMapper = nullptr,
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ValueMaterializer *Materializer = nullptr);
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/// MapValue - provide versions that preserve type safety for Constants.
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inline Constant *MapValue(const Constant *V, ValueToValueMapTy &VM,
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RemapFlags Flags = RF_None,
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ValueMapTypeRemapper *TypeMapper = nullptr,
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ValueMaterializer *Materializer = nullptr) {
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return cast<Constant>(MapValue((const Value*)V, VM, Flags, TypeMapper,
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Materializer));
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}
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} // End llvm namespace
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#endif
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