llvm::ValueMapper Class Reference

Context for (re-)mapping values (and metadata). More...

#include "llvm/Transforms/Utils/ValueMapper.h"

Public Member Functions
	ValueMapper (ValueToValueMapTy &VM, RemapFlags Flags=RF_None, ValueMapTypeRemapper *TypeMapper=nullptr, ValueMaterializer *Materializer=nullptr)
	ValueMapper (ValueMapper &&)=delete
	ValueMapper (const ValueMapper &)=delete
ValueMapper &	operator= (ValueMapper &&)=delete
ValueMapper &	operator= (const ValueMapper &)=delete
	~ValueMapper ()
unsigned	registerAlternateMappingContext (ValueToValueMapTy &VM, ValueMaterializer *Materializer=nullptr)
	Register an alternate mapping context. More...
void	addFlags (RemapFlags Flags)
	Add to the current RemapFlags. More...
Metadata *	mapMetadata (const Metadata &MD)
MDNode *	mapMDNode (const MDNode &N)
Value *	mapValue (const Value &V)
Constant *	mapConstant (const Constant &C)
void	remapInstruction (Instruction &I)
void	remapFunction (Function &F)
void	scheduleMapGlobalInitializer (GlobalVariable &GV, Constant &Init, unsigned MappingContextID=0)
void	scheduleMapAppendingVariable (GlobalVariable &GV, Constant *InitPrefix, bool IsOldCtorDtor, ArrayRef< Constant *> NewMembers, unsigned MappingContextID=0)
void	scheduleMapGlobalAliasee (GlobalAlias &GA, Constant &Aliasee, unsigned MappingContextID=0)
void	scheduleRemapFunction (Function &F, unsigned MappingContextID=0)

Detailed Description

Context for (re-)mapping values (and metadata).

A shared context used for mapping and remapping of Value and Metadata instances using ValueToValueMapTy, RemapFlags, ValueMapTypeRemapper, and ValueMaterializer.

There are a number of top-level entry points:

• mapValue() (and mapConstant());
• mapMetadata() (and mapMDNode());
• remapInstruction(); and
• remapFunction().

The ValueMaterializer can be used as a callback, but cannot invoke any of these top-level functions recursively. Instead, callbacks should use one of the following to schedule work lazily in the ValueMapper instance:

• scheduleMapGlobalInitializer()
• scheduleMapAppendingVariable()
• scheduleMapGlobalAliasee()
• scheduleRemapFunction()

Sometimes a callback needs a different mapping context. Such a context can be registered using registerAlternateMappingContext(), which takes an alternate ValueToValueMapTy and ValueMaterializer and returns a ID to pass into the schedule*() functions.

TODO: lib/Linker really doesn't need the ValueHandle in the ValueToValueMapTy. We should template ValueMapper (and its implementation classes), and explicitly instantiate on two concrete instances of ValueMap (one as ValueToValueMap, and one with raw Value pointers). It may be viable to do away with TrackingMDRef in the Metadata side map for the lib/Linker case as well, in which case we'll need a new template parameter on ValueMap.

TODO: Update callers of RemapInstruction() and MapValue() (etc.) to use ValueMapper directly.

Definition at line 142 of file ValueMapper.h.

Constructor & Destructor Documentation

ValueMapper() [1/3]

ValueMapper::ValueMapper	(	ValueToValueMapTy &	VM,
		RemapFlags	Flags = RF_None,
		ValueMapTypeRemapper *	TypeMapper = nullptr,
		ValueMaterializer *	Materializer = nullptr
	)

Definition at line 1080 of file ValueMapper.cpp.

ValueMapper() [2/3]

llvm::ValueMapper::ValueMapper ( ValueMapper &&  )

delete

ValueMapper() [3/3]

llvm::ValueMapper::ValueMapper ( const ValueMapper &  )

delete

~ValueMapper()

ValueMapper::~ValueMapper

(

)

Definition at line 1085 of file ValueMapper.cpp.

References getAsMapper().

Member Function Documentation

addFlags()

void ValueMapper::addFlags

(

RemapFlags

Flags

)

Add to the current RemapFlags.

Note

Like the top-level mapping functions, addFlags() must be called at the top level, not during a callback in a ValueMaterializer.

Definition at line 1093 of file ValueMapper.cpp.

mapConstant()

Constant * ValueMapper::mapConstant

(

const Constant &

C

)

Definition at line 1101 of file ValueMapper.cpp.

References mapValue().

Referenced by llvm::MapValue().

mapMDNode()

MDNode * ValueMapper::mapMDNode

(

const MDNode &

N

)

Definition at line 1109 of file ValueMapper.cpp.

References mapMetadata().

Referenced by llvm::MapMetadata().

mapMetadata()

Metadata * ValueMapper::mapMetadata

(

const Metadata &

MD

)

Definition at line 1105 of file ValueMapper.cpp.

Referenced by mapMDNode(), and llvm::MapMetadata().

mapValue()

Value * ValueMapper::mapValue

(

const Value &

V

)

Definition at line 1097 of file ValueMapper.cpp.

Referenced by mapConstant(), and llvm::MapValue().

operator=() [1/2]

ValueMapper& llvm::ValueMapper::operator= ( ValueMapper &&  )

delete

operator=() [2/2]

ValueMapper& llvm::ValueMapper::operator= ( const ValueMapper &  )

delete

registerAlternateMappingContext()

unsigned ValueMapper::registerAlternateMappingContext	(	ValueToValueMapTy &	VM,
		ValueMaterializer *	Materializer = nullptr
	)

Register an alternate mapping context.

Returns a MappingContextID that can be used with the various schedule*() API to switch in a different value map on-the-fly.

Definition at line 1088 of file ValueMapper.cpp.

References getAsMapper().

remapFunction()

void ValueMapper::remapFunction

(

Function &

F

)

Definition at line 1117 of file ValueMapper.cpp.

Referenced by llvm::RemapFunction().

remapInstruction()

void ValueMapper::remapInstruction

(

Instruction &

I

)

Definition at line 1113 of file ValueMapper.cpp.

Referenced by llvm::RemapInstruction().

scheduleMapAppendingVariable()

void ValueMapper::scheduleMapAppendingVariable	(	GlobalVariable &	GV,
		Constant *	InitPrefix,
		bool	IsOldCtorDtor,
		ArrayRef< Constant *>	NewMembers,
		unsigned	MappingContextID = 0
	)

Definition at line 1127 of file ValueMapper.cpp.

References getAsMapper().

scheduleMapGlobalAliasee()

void ValueMapper::scheduleMapGlobalAliasee	(	GlobalAlias &	GA,
		Constant &	Aliasee,
		unsigned	MappingContextID = 0
	)

Definition at line 1136 of file ValueMapper.cpp.

References getAsMapper().

scheduleMapGlobalInitializer()

void ValueMapper::scheduleMapGlobalInitializer	(	GlobalVariable &	GV,
		Constant &	Init,
		unsigned	MappingContextID = 0
	)

Definition at line 1121 of file ValueMapper.cpp.

References getAsMapper().

scheduleRemapFunction()

void ValueMapper::scheduleRemapFunction	(	Function &	F,
		unsigned	MappingContextID = 0
	)

Definition at line 1141 of file ValueMapper.cpp.

References getAsMapper().

---

The documentation for this class was generated from the following files:

• include/llvm/Transforms/Utils/ValueMapper.h
• lib/Transforms/Utils/ValueMapper.cpp