mirror of
https://github.com/RPCS3/llvm.git
synced 2026-01-31 01:25:19 +01:00
66bd82e422
Now the ValueMapper has two callbacks. The first one maps the declaration. The ValueMapper records the mapping and then materializes the body/initializer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254209 91177308-0d34-0410-b5e6-96231b3b80d8
120 lines
4.8 KiB
C++
120 lines
4.8 KiB
C++
//===- ValueMapper.h - Remapping for constants and metadata -----*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the MapValue interface which is used by various parts of
|
|
// the Transforms/Utils library to implement cloning and linking facilities.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TRANSFORMS_UTILS_VALUEMAPPER_H
|
|
#define LLVM_TRANSFORMS_UTILS_VALUEMAPPER_H
|
|
|
|
#include "llvm/IR/ValueMap.h"
|
|
|
|
namespace llvm {
|
|
class Value;
|
|
class Instruction;
|
|
typedef ValueMap<const Value *, WeakVH> ValueToValueMapTy;
|
|
|
|
/// ValueMapTypeRemapper - This is a class that can be implemented by clients
|
|
/// to remap types when cloning constants and instructions.
|
|
class ValueMapTypeRemapper {
|
|
virtual void anchor(); // Out of line method.
|
|
public:
|
|
virtual ~ValueMapTypeRemapper() {}
|
|
|
|
/// remapType - The client should implement this method if they want to
|
|
/// remap types while mapping values.
|
|
virtual Type *remapType(Type *SrcTy) = 0;
|
|
};
|
|
|
|
/// ValueMaterializer - This is a class that can be implemented by clients
|
|
/// to materialize Values on demand.
|
|
class ValueMaterializer {
|
|
virtual void anchor(); // Out of line method.
|
|
|
|
protected:
|
|
~ValueMaterializer() = default;
|
|
ValueMaterializer() = default;
|
|
ValueMaterializer(const ValueMaterializer&) = default;
|
|
ValueMaterializer &operator=(const ValueMaterializer&) = default;
|
|
|
|
public:
|
|
/// The client should implement this method if they want to generate a
|
|
/// mapped Value on demand. For example, if linking lazily.
|
|
virtual Value *materializeDeclFor(Value *V) = 0;
|
|
|
|
/// If the data being mapped is recursive, the above function can map
|
|
/// just the declaration and this is called to compute the initializer.
|
|
/// It is called after the mapping is recorded, so it doesn't need to worry
|
|
/// about recursion.
|
|
virtual void materializeInitFor(GlobalValue *New, GlobalValue *Old);
|
|
};
|
|
|
|
/// RemapFlags - These are flags that the value mapping APIs allow.
|
|
enum RemapFlags {
|
|
RF_None = 0,
|
|
|
|
/// RF_NoModuleLevelChanges - If this flag is set, the remapper knows that
|
|
/// only local values within a function (such as an instruction or argument)
|
|
/// are mapped, not global values like functions and global metadata.
|
|
RF_NoModuleLevelChanges = 1,
|
|
|
|
/// RF_IgnoreMissingEntries - If this flag is set, the remapper ignores
|
|
/// entries that are not in the value map. If it is unset, it aborts if an
|
|
/// operand is asked to be remapped which doesn't exist in the mapping.
|
|
RF_IgnoreMissingEntries = 2,
|
|
|
|
/// Instruct the remapper to move distinct metadata instead of duplicating
|
|
/// it when there are module-level changes.
|
|
RF_MoveDistinctMDs = 4,
|
|
|
|
/// Any global values not in value map are mapped to null instead of
|
|
/// mapping to self. Illegal if RF_IgnoreMissingEntries is also set.
|
|
RF_NullMapMissingGlobalValues = 8,
|
|
};
|
|
|
|
static inline RemapFlags operator|(RemapFlags LHS, RemapFlags RHS) {
|
|
return RemapFlags(unsigned(LHS)|unsigned(RHS));
|
|
}
|
|
|
|
Value *MapValue(const Value *V, ValueToValueMapTy &VM,
|
|
RemapFlags Flags = RF_None,
|
|
ValueMapTypeRemapper *TypeMapper = nullptr,
|
|
ValueMaterializer *Materializer = nullptr);
|
|
|
|
Metadata *MapMetadata(const Metadata *MD, ValueToValueMapTy &VM,
|
|
RemapFlags Flags = RF_None,
|
|
ValueMapTypeRemapper *TypeMapper = nullptr,
|
|
ValueMaterializer *Materializer = nullptr);
|
|
|
|
/// MapMetadata - provide versions that preserve type safety for MDNodes.
|
|
MDNode *MapMetadata(const MDNode *MD, ValueToValueMapTy &VM,
|
|
RemapFlags Flags = RF_None,
|
|
ValueMapTypeRemapper *TypeMapper = nullptr,
|
|
ValueMaterializer *Materializer = nullptr);
|
|
|
|
void RemapInstruction(Instruction *I, ValueToValueMapTy &VM,
|
|
RemapFlags Flags = RF_None,
|
|
ValueMapTypeRemapper *TypeMapper = nullptr,
|
|
ValueMaterializer *Materializer = nullptr);
|
|
|
|
/// MapValue - provide versions that preserve type safety for Constants.
|
|
inline Constant *MapValue(const Constant *V, ValueToValueMapTy &VM,
|
|
RemapFlags Flags = RF_None,
|
|
ValueMapTypeRemapper *TypeMapper = nullptr,
|
|
ValueMaterializer *Materializer = nullptr) {
|
|
return cast<Constant>(MapValue((const Value*)V, VM, Flags, TypeMapper,
|
|
Materializer));
|
|
}
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|