#include <AllocationOrder.h>

Public Member Functions
	AllocationOrder (unsigned VirtReg, const VirtRegMap &VRM, const RegisterClassInfo &RegClassInfo)

ArrayRef< MCPhysReg >	getOrder () const
	Get the allocation order without reordered hints. More...

unsigned	next ()

unsigned	nextWithDups (unsigned Limit)

void	rewind ()
	Start over from the beginning. More...

bool	isHint () const
	Return true if the last register returned from next() was a preferred register. More...

bool	isHint (unsigned PhysReg) const
	Return true if PhysReg is a preferred register. More...

Detailed Description

Definition at line 28 of file AllocationOrder.h.

Constructor & Destructor Documentation

AllocationOrder::AllocationOrder	(	unsigned	VirtReg,
		const VirtRegMap &	VRM,
		const RegisterClassInfo &	RegClassInfo
	)

Create a new AllocationOrder for VirtReg.

Parameters

VirtReg	Virtual register to allocate for.
VRM	Virtual register map for function.
RegClassInfo	Information about reserved and allocatable registers.

Definition at line 29 of file AllocationOrder.cpp.

References llvm::ArrayRef< T >::begin(), llvm::dbgs(), DEBUG, llvm::SmallVectorBase::empty(), llvm::ArrayRef< T >::end(), llvm::VirtRegMap::getMachineFunction(), llvm::RegisterClassInfo::getOrder(), llvm::TargetRegisterInfo::getRegAllocationHints(), llvm::MachineRegisterInfo::getRegClass(), llvm::MachineFunction::getRegInfo(), llvm::VirtRegMap::getTargetRegInfo(), I, rewind(), and llvm::SmallVectorTemplateCommon< T, typename >::size().

Member Function Documentation

ArrayRef<MCPhysReg> llvm::AllocationOrder::getOrder ( ) const

inline

Get the allocation order without reordered hints.

Definition at line 43 of file AllocationOrder.h.

bool llvm::AllocationOrder::isHint ( ) const

inline

Return true if the last register returned from next() was a preferred register.

Definition at line 75 of file AllocationOrder.h.

Referenced by next().

bool llvm::AllocationOrder::isHint ( unsigned PhysReg ) const

inline

Return true if PhysReg is a preferred register.

Definition at line 78 of file AllocationOrder.h.

References llvm::SmallVectorTemplateCommon< T, typename >::begin(), and llvm::SmallVectorTemplateCommon< T, typename >::end().

unsigned llvm::AllocationOrder::next ( )

inline

Return the next physical register in the allocation order, or 0. It is safe to call next() again after it returned 0, it will keep returning 0 until rewind() is called.

Definition at line 48 of file AllocationOrder.h.

References llvm::SmallVectorTemplateCommon< T, typename >::end(), isHint(), and llvm::ArrayRef< T >::size().

unsigned llvm::AllocationOrder::nextWithDups ( unsigned Limit )

inline

As next(), but allow duplicates to be returned, and stop before the Limit'th register in the RegisterClassInfo allocation order.

This can produce more than Limit registers if there are hints.

Definition at line 63 of file AllocationOrder.h.

References llvm::SmallVectorTemplateCommon< T, typename >::end().

void llvm::AllocationOrder::rewind ( )

inline

Start over from the beginning.

Definition at line 72 of file AllocationOrder.h.