llvm::OffsetSpan Struct Reference

OffsetSpan - Used internally by ObjectSizeOffsetVisitor. More...

#include "llvm/Analysis/MemoryBuiltins.h"

Public Member Functions
	OffsetSpan ()=default
	Number of allocated bytes after this point.
	OffsetSpan (APInt Before, APInt After)
bool	knownBefore () const
bool	knownAfter () const
bool	anyKnown () const
bool	bothKnown () const
bool	operator== (const OffsetSpan &RHS) const
bool	operator!= (const OffsetSpan &RHS) const

Static Public Member Functions
static bool	known (const APInt &V)

Public Attributes
APInt	Before
APInt	After
	Number of allocated bytes before this point.

Detailed Description

OffsetSpan - Used internally by ObjectSizeOffsetVisitor.

Represents a point in memory as a pair of allocated bytes before and after it.

Before and After fields are signed values. It makes it possible to represent out-of-bound access, e.g. as a result of a GEP, at the expense of not being able to represent very large allocation.

Definition at line 230 of file MemoryBuiltins.h.

Constructor & Destructor Documentation

OffsetSpan() [1/2]

llvm::OffsetSpan::OffsetSpan ( )

default

Number of allocated bytes after this point.

OffsetSpan() [2/2]

llvm::OffsetSpan::OffsetSpan ( APInt  Before, APInt  After  )

inline

Definition at line 235 of file MemoryBuiltins.h.

Member Function Documentation

anyKnown()

bool llvm::OffsetSpan::anyKnown ( ) const

inline

Definition at line 239 of file MemoryBuiltins.h.

References knownAfter(), and knownBefore().

bothKnown()

bool llvm::OffsetSpan::bothKnown ( ) const

inline

Definition at line 240 of file MemoryBuiltins.h.

References knownAfter(), and knownBefore().

Referenced by llvm::ObjectSizeOffsetVisitor::compute(), and llvm::ObjectSizeOffsetVisitor::visitLoadInst().

known()

static bool llvm::OffsetSpan::known ( const APInt &  V )

inlinestatic

Definition at line 247 of file MemoryBuiltins.h.

Referenced by knownAfter(), and knownBefore().

knownAfter()

bool llvm::OffsetSpan::knownAfter ( ) const

inline

Definition at line 238 of file MemoryBuiltins.h.

References After, and known().

Referenced by anyKnown(), bothKnown(), and llvm::ObjectSizeOffsetVisitor::compute().

knownBefore()

bool llvm::OffsetSpan::knownBefore ( ) const

inline

Definition at line 237 of file MemoryBuiltins.h.

References Before, and known().

Referenced by anyKnown(), bothKnown(), and llvm::ObjectSizeOffsetVisitor::compute().

operator!=()

bool llvm::OffsetSpan::operator!= ( const OffsetSpan &  RHS ) const

inline

Definition at line 245 of file MemoryBuiltins.h.

References RHS.

operator==()

bool llvm::OffsetSpan::operator== ( const OffsetSpan &  RHS ) const

inline

Definition at line 242 of file MemoryBuiltins.h.

References After, Before, and RHS.

Member Data Documentation

After

APInt llvm::OffsetSpan::After

Number of allocated bytes before this point.

Definition at line 232 of file MemoryBuiltins.h.

Referenced by llvm::ObjectSizeOffsetVisitor::compute(), knownAfter(), and operator==().

Before

APInt llvm::OffsetSpan::Before

Definition at line 231 of file MemoryBuiltins.h.

Referenced by llvm::ObjectSizeOffsetVisitor::compute(), knownBefore(), and operator==().

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

• include/llvm/Analysis/MemoryBuiltins.h