llvm::Rollbacker Class Reference

Rematerializer listener with the ability to re-create deleted registers and rollback rematerializations. More...

#include "llvm/CodeGen/Rematerializer.h"

Inheritance diagram for llvm::Rollbacker:

Public Member Functions
	Rollbacker ()=default
void	rollback (Rematerializer &Remater)
	Re-creates all deleted registers and rolls back all rematerializations that were recorded.
void	rematerializerNoteRegCreated (const Rematerializer &Remater, RegisterIdx RegIdx) override
	Called just after register NewRegIdx is created (following a rematerialization).
void	rematerializerNoteRegDeleted (const Rematerializer &Remater, RegisterIdx RegIdx) override
	Called juste before register RegIdx is deleted from the MIR.
Public Member Functions inherited from llvm::Rematerializer::Listener
virtual	~Listener ()=default

Additional Inherited Members
Public Types inherited from llvm::Rematerializer::Listener
using	RegisterIdx = Rematerializer::RegisterIdx

Detailed Description

Rematerializer listener with the ability to re-create deleted registers and rollback rematerializations.

Starts recording register deletions and rematerializations as soon as it is attached to the rematerializer.

Definition at line 508 of file Rematerializer.h.

Constructor & Destructor Documentation

Rollbacker()

llvm::Rollbacker::Rollbacker ( )

default

Member Function Documentation

rematerializerNoteRegCreated()

void Rollbacker::rematerializerNoteRegCreated ( const Rematerializer & Remater, RegisterIdx NewRegIdx )

overridevirtual

Called just after register NewRegIdx is created (following a rematerialization).

At this point the rematerialization exists in the Remater state and the MIR but does not yet have any user.

Reimplemented from llvm::Rematerializer::Listener.

Definition at line 778 of file Rematerializer.cpp.

References llvm::Rematerializer::getOriginOf().

rematerializerNoteRegDeleted()

void Rollbacker::rematerializerNoteRegDeleted ( const Rematerializer & Remater, RegisterIdx RegIdx )

overridevirtual

Called juste before register RegIdx is deleted from the MIR.

At this point the register still exists in the MIR but no longer has any user.

Reimplemented from llvm::Rematerializer::Listener.

Definition at line 785 of file Rematerializer.cpp.

References llvm::Rematerializer::isRematerializedRegister().

rollback()

void Rollbacker::rollback

(

Rematerializer &

Remater

)

Re-creates all deleted registers and rolls back all rematerializations that were recorded.

Definition at line 792 of file Rematerializer.cpp.

References assert(), llvm::Rematerializer::getReg(), llvm::Rematerializer::Reg::isAlive(), llvm::Rematerializer::NoReg, llvm::Rematerializer::recreateReg(), llvm::Rematerializer::transferAllUsers(), and llvm::Rematerializer::updateLiveIntervals().

---

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

• include/llvm/CodeGen/Rematerializer.h
• lib/CodeGen/Rematerializer.cpp