llvm::RegionPressure Struct Reference

RegisterPressure computed within a region of instructions delimited by TopPos and BottomPos. More...

#include "llvm/CodeGen/RegisterPressure.h"

Inheritance diagram for llvm::RegionPressure:

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

Public Attributes
MachineBasicBlock::const_iterator	TopPos
	Record the boundary of the region being tracked.
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.
SmallVector< RegisterMaskPair, 8 >	LiveInRegs
	List of live in virtual registers or physical register units.
SmallVector< RegisterMaskPair, 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 82 of file RegisterPressure.h.

Member Function Documentation

openBottom()

void RegionPressure::openBottom

(

MachineBasicBlock::const_iterator

PrevBottom

)

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

Definition at line 217 of file RegisterPressure.cpp.

References BottomPos, and llvm::RegisterPressure::LiveInRegs.

openTop()

void RegionPressure::openTop

(

MachineBasicBlock::const_iterator

PrevTop

)

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

Definition at line 201 of file RegisterPressure.cpp.

References llvm::RegisterPressure::LiveInRegs, and TopPos.

reset()

void RegionPressure::reset

(

)

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

Definition at line 184 of file RegisterPressure.cpp.

References BottomPos, llvm::RegisterPressure::LiveInRegs, llvm::RegisterPressure::LiveOutRegs, llvm::RegisterPressure::MaxSetPressure, and TopPos.

Member Data Documentation

BottomPos

MachineBasicBlock::const_iterator llvm::RegionPressure::BottomPos

Definition at line 85 of file RegisterPressure.h.

Referenced by llvm::RegPressureTracker::isBottomClosed(), openBottom(), and reset().

TopPos

MachineBasicBlock::const_iterator llvm::RegionPressure::TopPos

Record the boundary of the region being tracked.

Definition at line 84 of file RegisterPressure.h.

Referenced by llvm::RegPressureTracker::isTopClosed(), openTop(), and reset().

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

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