#include <GlobalStatus.h>

Collaboration diagram for llvm::GlobalStatus:

Public Types
enum	StoredType { NotStored, InitializerStored, StoredOnce, Stored }
	Keep track of what stores to the global look like. More...
Public Member Functions
	GlobalStatus ()
Static Public Member Functions
static bool	analyzeGlobal (const Value *V, GlobalStatus &GS)
Public Attributes
bool	IsCompared
	True if the global's address is used in a comparison.
bool	IsLoaded
enum llvm::GlobalStatus::StoredType	StoredType
Value *	StoredOnceValue
const Function *	AccessingFunction
bool	HasMultipleAccessingFunctions
bool	HasNonInstructionUser
AtomicOrdering	Ordering
	Set to the strongest atomic ordering requirement.

Detailed Description

As we analyze each global, keep track of some information about it. If we find out that the address of the global is taken, none of this info will be accurate.

Definition at line 28 of file GlobalStatus.h.

Member Enumeration Documentation

enum llvm::GlobalStatus::StoredType

Keep track of what stores to the global look like.

Enumerator:

NotStored	There is no store to this global. It can thus be marked constant.
InitializerStored	This global is stored to, but the only thing stored is the constant it was initialized with. This is only tracked for scalar globals.
StoredOnce	This global is stored to, but only its initializer and one other value is ever stored to it. If this global isStoredOnce, we track the value stored to it in StoredOnceValue below. This is only tracked for scalar globals.
Stored	This global is stored to by multiple values or something else that we cannot track.

Definition at line 37 of file GlobalStatus.h.

Constructor & Destructor Documentation

GlobalStatus::GlobalStatus ( )

Definition at line 180 of file GlobalStatus.cpp.

Member Function Documentation

bool GlobalStatus::analyzeGlobal	(	const Value *	V,
		GlobalStatus &	GS
	)		`[static]`

Look at all uses of the global and fill in the GlobalStatus structure. If the global has its address taken, return true to indicate we can't do anything with it.

Definition at line 175 of file GlobalStatus.cpp.

References analyzeGlobalAux().

Referenced by llvm::canBeOmittedFromSymbolTable().

Member Data Documentation

const Function* llvm::GlobalStatus::AccessingFunction

These start out null/false. When the first accessing function is noticed, it is recorded. When a second different accessing function is noticed, HasMultipleAccessingFunctions is set to true.

Definition at line 63 of file GlobalStatus.h.

Referenced by analyzeGlobalAux().

bool llvm::GlobalStatus::HasMultipleAccessingFunctions

Definition at line 64 of file GlobalStatus.h.

Referenced by analyzeGlobalAux().

bool llvm::GlobalStatus::HasNonInstructionUser

Set to true if this global has a user that is not an instruction (e.g. a constant expr or GV initializer).

Definition at line 68 of file GlobalStatus.h.

Referenced by analyzeGlobalAux().

bool llvm::GlobalStatus::IsCompared

True if the global's address is used in a comparison.

Definition at line 30 of file GlobalStatus.h.