llvm::AllocationOrder Class Reference

#include <AllocationOrder.h>

List of all members.

Public Member Functions
	AllocationOrder (unsigned VirtReg, const VirtRegMap &VRM, const RegisterClassInfo &RegClassInfo)
ArrayRef< MCPhysReg >	getOrder () const
	Get the allocation order without reordered hints.
unsigned	next (unsigned Limit=0)
unsigned	nextWithDups (unsigned Limit)
void	rewind ()
	Start over from the beginning.
bool	isHint () const
	Return true if the last register returned from next() was a preferred register.
bool	isHint (unsigned PhysReg) const
	Return true if PhysReg is a preferred register.

---

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 30 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 77 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 80 of file AllocationOrder.h.

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

unsigned llvm::AllocationOrder::next

(

unsigned

Limit = 0

)

[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 65 of file AllocationOrder.h.

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

void llvm::AllocationOrder::rewind

(

)

[inline]

Start over from the beginning.

Definition at line 74 of file AllocationOrder.h.

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

Referenced by AllocationOrder().

---

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

• AllocationOrder.h
• AllocationOrder.cpp