LUnallocated Class Reference

#include <lithium.h>

Inheritance diagram for LUnallocated:

Collaboration diagram for LUnallocated:

Data Structures
class	LifetimeField
class	PolicyField
class	VirtualRegisterField

Public Types
enum	Policy {   NONE, ANY, FIXED_REGISTER, FIXED_DOUBLE_REGISTER,   FIXED_SLOT, MUST_HAVE_REGISTER, WRITABLE_REGISTER, SAME_AS_FIRST_INPUT }
enum	Lifetime { USED_AT_START, USED_AT_END }
Public Types inherited from LOperand
enum	Kind {   INVALID, UNALLOCATED, CONSTANT_OPERAND, STACK_SLOT,   DOUBLE_STACK_SLOT, REGISTER, DOUBLE_REGISTER, ARGUMENT }

Public Member Functions
	LUnallocated (Policy policy)
	LUnallocated (Policy policy, int fixed_index)
	LUnallocated (Policy policy, Lifetime lifetime)
	STATIC_ASSERT (kFixedIndexWidth > 5)
bool	HasAnyPolicy () const
bool	HasFixedPolicy () const
bool	HasRegisterPolicy () const
bool	HasSameAsInputPolicy () const
Policy	policy () const
void	set_policy (Policy policy)
int	fixed_index () const
int	virtual_register () const
void	set_virtual_register (unsigned id)
LUnallocated *	CopyUnconstrained (Zone *zone)
bool	IsUsedAtStart ()
Public Member Functions inherited from LOperand
	LOperand ()
Kind	kind () const
int	index () const
bool	Equals (LOperand *other) const
void	PrintTo (StringStream *stream)
void	ConvertTo (Kind kind, int index)
Public Member Functions inherited from ZoneObject
	INLINE (void *operator new(size_t size, Zone *zone))
void	operator delete (void *, size_t)
void	operator delete (void *pointer, Zone *zone)

Static Public Member Functions
static LUnallocated *	cast (LOperand *op)
Static Public Member Functions inherited from LOperand
static void	SetUpCaches ()
static void	TearDownCaches ()

Static Public Attributes
static const int	kPolicyWidth = 3
static const int	kLifetimeWidth = 1
static const int	kVirtualRegisterWidth = 15
static const int	kPolicyShift = kKindFieldWidth
static const int	kLifetimeShift = kPolicyShift + kPolicyWidth
static const int	kVirtualRegisterShift = kLifetimeShift + kLifetimeWidth
static const int	kFixedIndexShift
static const int	kFixedIndexWidth = 32 - kFixedIndexShift
static const int	kMaxVirtualRegisters = 1 << kVirtualRegisterWidth
static const int	kMaxFixedIndex = (1 << kFixedIndexWidth) - 1
static const int	kMinFixedIndex = -(1 << kFixedIndexWidth)

Additional Inherited Members
Protected Member Functions inherited from LOperand
	LOperand (Kind kind, int index)
Protected Attributes inherited from LOperand
unsigned	value_
Static Protected Attributes inherited from LOperand
static const int	kKindFieldWidth = 3

Detailed Description

Definition at line 93 of file lithium.h.

Member Enumeration Documentation

enum Lifetime

Enumerator
USED_AT_START
USED_AT_END

Definition at line 107 of file lithium.h.

enum Policy

Enumerator
NONE
ANY
FIXED_REGISTER
FIXED_DOUBLE_REGISTER
FIXED_SLOT
MUST_HAVE_REGISTER
WRITABLE_REGISTER
SAME_AS_FIRST_INPUT

Definition at line 95 of file lithium.h.

Constructor & Destructor Documentation

LUnallocated ( Policy  policy )

inlineexplicit

Definition at line 120 of file lithium.h.

References LUnallocated::USED_AT_END.

Referenced by LUnallocated::CopyUnconstrained().

LUnallocated ( Policy  policy, int  fixed_index  )

inline

Definition at line 124 of file lithium.h.

References LUnallocated::USED_AT_END.

LUnallocated ( Policy  policy, Lifetime  lifetime  )

inline

Definition at line 128 of file lithium.h.

Member Function Documentation

static LUnallocated* cast ( LOperand *  op )

inlinestatic

Definition at line 198 of file lithium.h.

References ASSERT.

Referenced by LOperand::PrintTo(), and UsePosition::UsePosition().

LUnallocated* CopyUnconstrained ( Zone *  zone )

inline

Definition at line 192 of file lithium.h.

References LUnallocated::ANY, LUnallocated::LUnallocated(), LUnallocated::set_virtual_register(), and LUnallocated::virtual_register().

int fixed_index ( ) const

inline

Definition at line 180 of file lithium.h.

References LUnallocated::kFixedIndexShift, and LOperand::value_.

Referenced by LOperand::PrintTo().

bool HasAnyPolicy ( ) const

inline

Definition at line 162 of file lithium.h.

References LUnallocated::ANY, and LUnallocated::policy().

Referenced by UsePosition::UsePosition().

bool HasFixedPolicy ( ) const

inline

Definition at line 165 of file lithium.h.

References LUnallocated::FIXED_DOUBLE_REGISTER, LUnallocated::FIXED_REGISTER, LUnallocated::FIXED_SLOT, and LUnallocated::policy().

bool HasRegisterPolicy ( ) const

inline

Definition at line 170 of file lithium.h.

References LUnallocated::MUST_HAVE_REGISTER, LUnallocated::policy(), and LUnallocated::WRITABLE_REGISTER.

Referenced by UsePosition::UsePosition().

bool HasSameAsInputPolicy ( ) const

inline

Definition at line 173 of file lithium.h.

References LUnallocated::policy(), and LUnallocated::SAME_AS_FIRST_INPUT.

bool IsUsedAtStart ( )

inline

Definition at line 203 of file lithium.h.

References BitField< Lifetime, kLifetimeShift, kLifetimeWidth >::decode(), LUnallocated::USED_AT_START, and LOperand::value_.

Policy policy ( ) const

inline

Definition at line 176 of file lithium.h.

References BitField< Policy, kPolicyShift, kPolicyWidth >::decode(), and LOperand::value_.

Referenced by LUnallocated::HasAnyPolicy(), LUnallocated::HasFixedPolicy(), LUnallocated::HasRegisterPolicy(), LUnallocated::HasSameAsInputPolicy(), and LOperand::PrintTo().

void set_policy ( Policy  policy )

inline

Definition at line 177 of file lithium.h.

References BitField< Policy, kPolicyShift, kPolicyWidth >::update(), and LOperand::value_.

void set_virtual_register ( unsigned  id )

inline

Definition at line 188 of file lithium.h.

References BitField< unsigned, kVirtualRegisterShift, kVirtualRegisterWidth >::update(), and LOperand::value_.

Referenced by LUnallocated::CopyUnconstrained(), and LiveRange::CreateAssignedOperand().

STATIC_ASSERT	(	kFixedIndexWidth	,
		5
	)

int virtual_register ( ) const

inline

Definition at line 184 of file lithium.h.

References BitField< unsigned, kVirtualRegisterShift, kVirtualRegisterWidth >::decode(), and LOperand::value_.

Referenced by LUnallocated::CopyUnconstrained(), and LOperand::PrintTo().

Field Documentation

const int kFixedIndexShift

static

Initial value:

=
      kVirtualRegisterShift + kVirtualRegisterWidth

Definition at line 141 of file lithium.h.

Referenced by LUnallocated::fixed_index().

const int kFixedIndexWidth = 32 - kFixedIndexShift

static

Definition at line 143 of file lithium.h.

const int kLifetimeShift = kPolicyShift + kPolicyWidth

static

Definition at line 139 of file lithium.h.

const int kLifetimeWidth = 1

static

Definition at line 135 of file lithium.h.

const int kMaxFixedIndex = (1 << kFixedIndexWidth) - 1

static

Definition at line 159 of file lithium.h.

Referenced by OptimizingCompiler::CreateGraph().

const int kMaxVirtualRegisters = 1 << kVirtualRegisterWidth

static

Definition at line 158 of file lithium.h.

Referenced by BASE_EMBEDDED< Visitor >::GetVirtualRegister(), and LChunk::NewChunk().

const int kMinFixedIndex = -(1 << kFixedIndexWidth)

static

Definition at line 160 of file lithium.h.

Referenced by OptimizingCompiler::CreateGraph().

const int kPolicyShift = kKindFieldWidth

static

Definition at line 138 of file lithium.h.

const int kPolicyWidth = 3

static

Definition at line 134 of file lithium.h.

const int kVirtualRegisterShift = kLifetimeShift + kLifetimeWidth

static

Definition at line 140 of file lithium.h.

const int kVirtualRegisterWidth = 15

static

Definition at line 136 of file lithium.h.

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

• src/lithium.h