llvm::GISelObserverWrapper

Wrapper that forwards each change event to a list of observers.

Synopsis

Declared in <llvm/CodeGen/GlobalISel/GISelChangeObserver.h>

class GISelObserverWrapper
    : public MachineFunction::Delegate
    , public GISelChangeObserver

If there are multiple observers (say CSE, Legalizer, Combiner), it's sufficient to register this to the machine function as the delegate.

Name

Description

Callback interface notified when instructions are inserted or removed.

Abstract base for clients that observe GlobalISel instruction changes.

Name

Description

Constructors

Callback before changing MCInstrDesc. This should not modify the MI directly.

MachineFunction::Delegate hook that treats insertion as createdInstr.

MachineFunction::Delegate hook that treats removal as erasingInstr.

Add an observer to the list.

Forward a changed notification to every registered observer.

Notify that all instructions using Reg are being changed.

Forward a changing notification to every registered observer.

Remove all observers from the list.

Forward a create notification to every registered observer.

Forward an erase notification to every registered observer.

All instructions reported as changing by changingAllUsesOfReg() have finished being changed.

Remove an observer from the list if present.

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