llvm::RegionPressure Struct Reference

#include <RegisterPressure.h>

Inheritance diagram for llvm::RegionPressure:

Collaboration diagram for llvm::RegionPressure:

Public Member Functions
void	reset ()
	Clear the result so it can be used for another round of pressure tracking. More...
void	openTop (MachineBasicBlock::const_iterator PrevTop)
	If the current top is the previous instruction (before receding), open it. More...
void	openBottom (MachineBasicBlock::const_iterator PrevBottom)
	If the current bottom is the previous instr (before advancing), open it. More...
Public Member Functions inherited from llvm::RegisterPressure
void	increase (unsigned Reg, const TargetRegisterInfo *TRI, const MachineRegisterInfo *MRI)
void	decrease (unsigned Reg, const TargetRegisterInfo *TRI, const MachineRegisterInfo *MRI)
void	dump (const TargetRegisterInfo *TRI) const

Public Attributes
MachineBasicBlock::const_iterator	TopPos
	Record the boundary of the region being tracked. More...
MachineBasicBlock::const_iterator	BottomPos
Public Attributes inherited from llvm::RegisterPressure
std::vector< unsigned >	MaxSetPressure
	Map of max reg pressure indexed by pressure set ID, not class ID. More...
SmallVector< unsigned, 8 >	LiveInRegs
	List of live in virtual registers or physical register units. More...
SmallVector< unsigned, 8 >	LiveOutRegs

Detailed Description

RegisterPressure computed within a region of instructions delimited by TopPos and BottomPos. This is a less precise version of IntervalPressure for use when LiveIntervals are unavailable.

Definition at line 80 of file RegisterPressure.h.

Member Function Documentation

void RegionPressure::openBottom

(

MachineBasicBlock::const_iterator

PrevBottom

)

If the current bottom is the previous instr (before advancing), open it.

Definition at line 143 of file RegisterPressure.cpp.

References BottomPos, llvm::SmallVectorImpl< T >::clear(), and llvm::RegisterPressure::LiveInRegs.

void RegionPressure::openTop

(

MachineBasicBlock::const_iterator

PrevTop

)

If the current top is the previous instruction (before receding), open it.

Definition at line 127 of file RegisterPressure.cpp.

References llvm::SmallVectorImpl< T >::clear(), llvm::RegisterPressure::LiveInRegs, and TopPos.

void RegionPressure::reset

(

)

Clear the result so it can be used for another round of pressure tracking.

Definition at line 110 of file RegisterPressure.cpp.

References BottomPos, llvm::SmallVectorImpl< T >::clear(), llvm::RegisterPressure::LiveInRegs, llvm::RegisterPressure::LiveOutRegs, llvm::RegisterPressure::MaxSetPressure, and TopPos.

Member Data Documentation

MachineBasicBlock::const_iterator llvm::RegionPressure::BottomPos

Definition at line 83 of file RegisterPressure.h.

Referenced by openBottom(), and reset().

MachineBasicBlock::const_iterator llvm::RegionPressure::TopPos

Record the boundary of the region being tracked.

Definition at line 82 of file RegisterPressure.h.

Referenced by openTop(), and reset().

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

• RegisterPressure.h
• RegisterPressure.cpp