The optimization diagnostic interface. More...

#include "llvm/CodeGen/MachineOptimizationRemarkEmitter.h"

Public Member Functions
	MachineOptimizationRemarkEmitter (MachineFunction &MF, MachineBlockFrequencyInfo *MBFI)

	MachineOptimizationRemarkEmitter (MachineOptimizationRemarkEmitter &&)=default

bool	invalidate (MachineFunction &MF, const PreservedAnalyses &PA, MachineFunctionAnalysisManager::Invalidator &Inv)
	Handle invalidation events in the new pass manager.

void	emit (DiagnosticInfoOptimizationBase &OptDiag)
	Emit an optimization remark.

bool	allowExtraAnalysis (StringRef PassName) const
	Whether we allow for extra compile-time budget to perform more analysis to be more informative.

template<typename T >
void	emit (T RemarkBuilder, decltype(RemarkBuilder()) *=nullptr)
	Take a lambda that returns a remark which will be emitted.

MachineBlockFrequencyInfo *	getBFI ()

Detailed Description

The optimization diagnostic interface.

It allows reporting when optimizations are performed and when they are not along with the reasons for it. Hotness information of the corresponding code region can be included in the remark if DiagnosticsHotnessRequested is enabled in the LLVM context.

Definition at line 153 of file MachineOptimizationRemarkEmitter.h.

Constructor & Destructor Documentation

◆ MachineOptimizationRemarkEmitter() [1/2]

llvm::MachineOptimizationRemarkEmitter::MachineOptimizationRemarkEmitter	(	MachineFunction &	MF,
		MachineBlockFrequencyInfo *	MBFI
	)

inline

Definition at line 155 of file MachineOptimizationRemarkEmitter.h.

◆ MachineOptimizationRemarkEmitter() [2/2]

llvm::MachineOptimizationRemarkEmitter::MachineOptimizationRemarkEmitter ( MachineOptimizationRemarkEmitter && )

default

Member Function Documentation

◆ allowExtraAnalysis()

bool llvm::MachineOptimizationRemarkEmitter::allowExtraAnalysis ( StringRef PassName ) const

inline

Whether we allow for extra compile-time budget to perform more analysis to be more informative.

This is useful to enable additional missed optimizations to be reported that are normally too noisy. In this mode, we can use the extra analysis (1) to filter trivial false positives or (2) to provide more context so that non-trivial false positives can be quickly detected by the user.

Definition at line 176 of file MachineOptimizationRemarkEmitter.h.

References llvm::Function::getContext(), llvm::LLVMContext::getDiagHandlerPtr(), llvm::MachineFunction::getFunction(), llvm::LLVMContext::getLLVMRemarkStreamer(), llvm::DiagnosticHandler::isAnyRemarkEnabled(), and PassName.

Referenced by llvm::AsmPrinter::emitFunctionBody().