#include <GCStrategy.h>

Collaboration diagram for llvm::GCStrategy:

Public Types
typedef std::vector < std::unique_ptr < GCFunctionInfo > >	list_type
typedef list_type::iterator	iterator
Public Member Functions
	GCStrategy ()
virtual	~GCStrategy ()
const std::string &	getName () const
const Module &	getModule () const
bool	needsSafePoints () const
	needsSafePoitns - True if safe points of any kind are required. By
bool	needsSafePoint (GC::PointKind Kind) const
	needsSafePoint(Kind) - True if the given kind of safe point is
bool	customWriteBarrier () const
bool	customReadBarrier () const
bool	customRoots () const
bool	customSafePoints () const
bool	initializeRoots () const
	initializeRoots - If set, gcroot intrinsics should initialize their
bool	usesMetadata () const
iterator	begin ()
iterator	end ()
GCFunctionInfo *	insertFunctionInfo (const Function &F)
virtual bool	initializeCustomLowering (Module &F)
virtual bool	performCustomLowering (Function &F)
virtual bool	findCustomSafePoints (GCFunctionInfo &FI, MachineFunction &MF)
Protected Attributes
unsigned	NeededSafePoints
	Bitmask of required safe points.
bool	CustomReadBarriers
	Default is to insert loads.
bool	CustomWriteBarriers
	Default is to insert stores.
bool	CustomRoots
	Default is to pass through to backend.
bool	CustomSafePoints
bool	InitRoots
	If set, roots are nulled during lowering.
bool	UsesMetadata
	If set, backend must emit metadata tables.
Friends
class	GCModuleInfo

Detailed Description

GCStrategy describes a garbage collector algorithm's code generation requirements, and provides overridable hooks for those needs which cannot be abstractly described.

Definition at line 55 of file GCStrategy.h.

Member Typedef Documentation

typedef list_type::iterator llvm::GCStrategy::iterator

Definition at line 58 of file GCStrategy.h.

typedef std::vector<std::unique_ptr<GCFunctionInfo> > llvm::GCStrategy::list_type

Definition at line 57 of file GCStrategy.h.

Constructor & Destructor Documentation

GCStrategy::GCStrategy ( )

Definition at line 95 of file GCStrategy.cpp.

virtual llvm::GCStrategy::~GCStrategy ( ) [inline, virtual]

Definition at line 80 of file GCStrategy.h.

Member Function Documentation

iterator llvm::GCStrategy::begin ( ) [inline]

begin/end - Iterators for function metadata.

Definition at line 134 of file GCStrategy.h.

Referenced by llvm::GCMetadataPrinter::begin().

bool llvm::GCStrategy::customReadBarrier ( ) const [inline]

customReadBarrier - By default, read barriers are replaced with simple load instructions. If true, then performCustomLowering must instead lower them.

Definition at line 111 of file GCStrategy.h.

References CustomReadBarriers.

bool llvm::GCStrategy::customRoots ( ) const [inline]

customRoots - By default, roots are left for the code generator so it can generate a stack map. If true, then

Definition at line 116 of file GCStrategy.h.

References CustomRoots.

bool llvm::GCStrategy::customSafePoints ( ) const [inline]

customSafePoints - By default, the GC analysis will find safe points according to NeededSafePoints. If true, then findCustomSafePoints must create them.

Definition at line 121 of file GCStrategy.h.

References CustomSafePoints.

bool llvm::GCStrategy::customWriteBarrier ( ) const [inline]

customWriteBarrier - By default, write barriers are replaced with simple store instructions. If true, then performCustomLowering must instead lower them.

Definition at line 106 of file GCStrategy.h.

References CustomWriteBarriers.

iterator llvm::GCStrategy::end ( ) [inline]

Definition at line 135 of file GCStrategy.h.

Referenced by llvm::GCMetadataPrinter::end().

bool GCStrategy::findCustomSafePoints	(	GCFunctionInfo &	FI,
		MachineFunction &	MF
	)		`[virtual]`

Definition at line 113 of file GCStrategy.cpp.

References llvm::dbgs(), getName(), and llvm_unreachable.

const Module& llvm::GCStrategy::getModule ( ) const [inline]

getModule - The module within which the GC strategy is operating.

Definition at line 89 of file GCStrategy.h.

Referenced by llvm::GCMetadataPrinter::getModule().

const std::string& llvm::GCStrategy::getName ( ) const [inline]

getName - The name of the GC strategy, for debugging.

Definition at line 85 of file GCStrategy.h.

References Name.

Referenced by findCustomSafePoints(), and performCustomLowering().

bool GCStrategy::initializeCustomLowering ( Module & F ) [virtual]

initializeCustomLowering/performCustomLowering - If any of the actions are set to custom, performCustomLowering must be overriden to transform the corresponding actions to LLVM IR. initializeCustomLowering is optional to override. These are the only GCStrategy methods through which the LLVM IR can be modified.

Definition at line 105 of file GCStrategy.cpp.

bool llvm::GCStrategy::initializeRoots ( ) const [inline]

initializeRoots - If set, gcroot intrinsics should initialize their

Definition at line 126 of file GCStrategy.h.

References InitRoots.

GCFunctionInfo * GCStrategy::insertFunctionInfo ( const Function & F )