LLVM 19.0.0git
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llvm::GISelObserverWrapper Class Reference

Simple wrapper observer that takes several observers, and calls each one for each event. More...

#include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"

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Public Member Functions

 GISelObserverWrapper ()=default
 
 GISelObserverWrapper (ArrayRef< GISelChangeObserver * > Obs)
 
void addObserver (GISelChangeObserver *O)
 
void removeObserver (GISelChangeObserver *O)
 
void erasingInstr (MachineInstr &MI) override
 An instruction is about to be erased.
 
void createdInstr (MachineInstr &MI) override
 An instruction has been created and inserted into the function.
 
void changingInstr (MachineInstr &MI) override
 This instruction is about to be mutated in some way.
 
void changedInstr (MachineInstr &MI) override
 This instruction was mutated in some way.
 
void MF_HandleInsertion (MachineInstr &MI) override
 Callback after an insertion. This should not modify the MI directly.
 
void MF_HandleRemoval (MachineInstr &MI) override
 Callback before a removal. This should not modify the MI directly.
 
- Public Member Functions inherited from llvm::MachineFunction::Delegate
virtual ~Delegate ()=default
 
virtual void MF_HandleInsertion (MachineInstr &MI)=0
 Callback after an insertion. This should not modify the MI directly.
 
virtual void MF_HandleRemoval (MachineInstr &MI)=0
 Callback before a removal. This should not modify the MI directly.
 
virtual void MF_HandleChangeDesc (MachineInstr &MI, const MCInstrDesc &TID)
 Callback before changing MCInstrDesc.
 
- Public Member Functions inherited from llvm::GISelChangeObserver
virtual ~GISelChangeObserver ()=default
 
virtual void erasingInstr (MachineInstr &MI)=0
 An instruction is about to be erased.
 
virtual void createdInstr (MachineInstr &MI)=0
 An instruction has been created and inserted into the function.
 
virtual void changingInstr (MachineInstr &MI)=0
 This instruction is about to be mutated in some way.
 
virtual void changedInstr (MachineInstr &MI)=0
 This instruction was mutated in some way.
 
void changingAllUsesOfReg (const MachineRegisterInfo &MRI, Register Reg)
 All the instructions using the given register are being changed.
 
void finishedChangingAllUsesOfReg ()
 All instructions reported as changing by changingAllUsesOfReg() have finished being changed.
 

Detailed Description

Simple wrapper observer that takes several observers, and calls each one for each event.

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

Definition at line 66 of file GISelChangeObserver.h.

Constructor & Destructor Documentation

◆ GISelObserverWrapper() [1/2]

llvm::GISelObserverWrapper::GISelObserverWrapper ( )
default

◆ GISelObserverWrapper() [2/2]

llvm::GISelObserverWrapper::GISelObserverWrapper ( ArrayRef< GISelChangeObserver * >  Obs)
inline

Definition at line 72 of file GISelChangeObserver.h.

Member Function Documentation

◆ addObserver()

void llvm::GISelObserverWrapper::addObserver ( GISelChangeObserver O)
inline

◆ changedInstr()

void llvm::GISelObserverWrapper::changedInstr ( MachineInstr MI)
inlineoverridevirtual

This instruction was mutated in some way.

Implements llvm::GISelChangeObserver.

Definition at line 96 of file GISelChangeObserver.h.

References MI.

Referenced by llvm::LegalizationArtifactCombiner::tryCombineInstruction(), and llvm::LegalizationArtifactCombiner::tryCombineZExt().

◆ changingInstr()

void llvm::GISelObserverWrapper::changingInstr ( MachineInstr MI)
inlineoverridevirtual

This instruction is about to be mutated in some way.

Implements llvm::GISelChangeObserver.

Definition at line 92 of file GISelChangeObserver.h.

References MI.

Referenced by llvm::LegalizationArtifactCombiner::tryCombineZExt().

◆ createdInstr()

void llvm::GISelObserverWrapper::createdInstr ( MachineInstr MI)
inlineoverridevirtual

An instruction has been created and inserted into the function.

Note that the instruction might not be a fully fledged instruction at this point and won't be if the MachineFunction::Delegate is calling it. This is because the delegate only sees the construction of the MachineInstr before operands have been added.

Implements llvm::GISelChangeObserver.

Definition at line 88 of file GISelChangeObserver.h.

References MI.

Referenced by MF_HandleInsertion().

◆ erasingInstr()

void llvm::GISelObserverWrapper::erasingInstr ( MachineInstr MI)
inlineoverridevirtual

An instruction is about to be erased.

Implements llvm::GISelChangeObserver.

Definition at line 84 of file GISelChangeObserver.h.

References MI.

Referenced by MF_HandleRemoval().

◆ MF_HandleInsertion()

void llvm::GISelObserverWrapper::MF_HandleInsertion ( MachineInstr MI)
inlineoverridevirtual

Callback after an insertion. This should not modify the MI directly.

Implements llvm::MachineFunction::Delegate.

Definition at line 101 of file GISelChangeObserver.h.

References createdInstr(), and MI.

◆ MF_HandleRemoval()

void llvm::GISelObserverWrapper::MF_HandleRemoval ( MachineInstr MI)
inlineoverridevirtual

Callback before a removal. This should not modify the MI directly.

Implements llvm::MachineFunction::Delegate.

Definition at line 102 of file GISelChangeObserver.h.

References erasingInstr(), and MI.

◆ removeObserver()

void llvm::GISelObserverWrapper::removeObserver ( GISelChangeObserver O)
inline

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