llvm::RegAllocBase Class Reference

#include <RegAllocBase.h>

Collaboration diagram for llvm::RegAllocBase:

Static Public Attributes
static bool	VerifyEnabled = false
	VerifyEnabled - True when -verify-regalloc is given. More...

Protected Member Functions
	RegAllocBase ()
virtual	~RegAllocBase ()
void	init (VirtRegMap &vrm, LiveIntervals &lis, LiveRegMatrix &mat)
void	allocatePhysRegs ()
virtual Spiller &	spiller ()=0
virtual void	enqueue (LiveInterval *LI)=0
	enqueue - Add VirtReg to the priority queue of unassigned registers. More...
virtual LiveInterval *	dequeue ()=0
	dequeue - Return the next unassigned register, or NULL. More...
virtual unsigned	selectOrSplit (LiveInterval &VirtReg, SmallVectorImpl< unsigned > &splitLVRs)=0

Protected Attributes
const TargetRegisterInfo *	TRI
MachineRegisterInfo *	MRI
VirtRegMap *	VRM
LiveIntervals *	LIS
LiveRegMatrix *	Matrix
RegisterClassInfo	RegClassInfo

Static Protected Attributes
static const char	TimerGroupName [] = "Register Allocation"

Detailed Description

RegAllocBase provides the register allocation driver and interface that can be extended to add interesting heuristics.

Register allocators must override the selectOrSplit() method to implement live range splitting. They must also override enqueue/dequeue to provide an assignment order.

Definition at line 59 of file RegAllocBase.h.

Constructor & Destructor Documentation

llvm::RegAllocBase::RegAllocBase ( )

inlineprotected

Definition at line 69 of file RegAllocBase.h.

virtual llvm::RegAllocBase::~RegAllocBase ( )

inlineprotectedvirtual

Definition at line 71 of file RegAllocBase.h.

Member Function Documentation

void RegAllocBase::allocatePhysRegs ( )

protected

Definition at line 83 of file RegAllocBase.cpp.

References llvm::LiveRegMatrix::assign(), llvm::VirtRegMap::assignVirt2Phys(), llvm::dbgs(), DEBUG, dequeue(), llvm::MachineInstr::emitError(), enqueue(), llvm::LiveIntervals::getInterval(), llvm::TargetRegisterClass::getName(), llvm::RegisterClassInfo::getOrder(), llvm::MachineRegisterInfo::getRegClass(), llvm::VirtRegMap::hasPhys(), I, llvm::LiveRegMatrix::invalidateVirtRegs(), llvm::MachineInstr::isInlineAsm(), llvm::TargetRegisterInfo::isVirtualRegister(), LIS, Matrix, llvm::A64CC::MI, MRI, llvm::LiveInterval::reg, llvm::MachineRegisterInfo::reg_begin(), llvm::MachineRegisterInfo::reg_nodbg_empty(), RegClassInfo, llvm::LiveIntervals::removeInterval(), llvm::report_fatal_error(), selectOrSplit(), and VRM.

virtual LiveInterval* llvm::RegAllocBase::dequeue ( )

protectedpure virtual

dequeue - Return the next unassigned register, or NULL.

Referenced by allocatePhysRegs().

virtual void llvm::RegAllocBase::enqueue ( LiveInterval *  LI )

protectedpure virtual

enqueue - Add VirtReg to the priority queue of unassigned registers.

Referenced by allocatePhysRegs().

void RegAllocBase::init ( VirtRegMap &  vrm, LiveIntervals &  lis, LiveRegMatrix &  mat  )

protected

Definition at line 56 of file RegAllocBase.cpp.

References llvm::MachineRegisterInfo::freezeReservedRegs(), llvm::VirtRegMap::getMachineFunction(), llvm::VirtRegMap::getRegInfo(), llvm::VirtRegMap::getTargetRegInfo(), LIS, Matrix, MRI, RegClassInfo, llvm::RegisterClassInfo::runOnMachineFunction(), TRI, and VRM.

virtual unsigned llvm::RegAllocBase::selectOrSplit ( LiveInterval &  VirtReg, SmallVectorImpl< unsigned > &  splitLVRs  )

protectedpure virtual

Referenced by allocatePhysRegs().

virtual Spiller& llvm::RegAllocBase::spiller ( )

protectedpure virtual

Member Data Documentation

LiveIntervals* llvm::RegAllocBase::LIS

protected

Definition at line 65 of file RegAllocBase.h.

Referenced by allocatePhysRegs(), and init().

LiveRegMatrix* llvm::RegAllocBase::Matrix

protected

Definition at line 66 of file RegAllocBase.h.

Referenced by allocatePhysRegs(), and init().

MachineRegisterInfo* llvm::RegAllocBase::MRI

protected

Definition at line 63 of file RegAllocBase.h.

Referenced by allocatePhysRegs(), and init().

RegisterClassInfo llvm::RegAllocBase::RegClassInfo

protected

Definition at line 67 of file RegAllocBase.h.

Referenced by allocatePhysRegs(), and init().

const char RegAllocBase::TimerGroupName = "Register Allocation"

staticprotected

Definition at line 97 of file RegAllocBase.h.

const TargetRegisterInfo* llvm::RegAllocBase::TRI

protected

Definition at line 62 of file RegAllocBase.h.

Referenced by init().

bool RegAllocBase::VerifyEnabled = false

static

VerifyEnabled - True when -verify-regalloc is given.

Definition at line 101 of file RegAllocBase.h.

VirtRegMap* llvm::RegAllocBase::VRM

protected

Definition at line 64 of file RegAllocBase.h.

Referenced by allocatePhysRegs(), and init().

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

• RegAllocBase.h
• RegAllocBase.cpp