llvm::ObjectSizeOffsetVisitor Class Reference

Evaluate the size and offset of an object pointed to by a Value* statically. More...

#include "llvm/Analysis/MemoryBuiltins.h"

Inheritance diagram for llvm::ObjectSizeOffsetVisitor:

Collaboration diagram for llvm::ObjectSizeOffsetVisitor:

Public Member Functions
	ObjectSizeOffsetVisitor (const DataLayout &DL, const TargetLibraryInfo *TLI, LLVMContext &Context, ObjectSizeOpts Options={})
SizeOffsetType	compute (Value *V)
SizeOffsetType	visitAllocaInst (AllocaInst &I)
SizeOffsetType	visitArgument (Argument &A)
SizeOffsetType	visitCallBase (CallBase &CB)
SizeOffsetType	visitConstantPointerNull (ConstantPointerNull &)
SizeOffsetType	visitExtractElementInst (ExtractElementInst &I)
SizeOffsetType	visitExtractValueInst (ExtractValueInst &I)
SizeOffsetType	visitGlobalAlias (GlobalAlias &GA)
SizeOffsetType	visitGlobalVariable (GlobalVariable &GV)
SizeOffsetType	visitIntToPtrInst (IntToPtrInst &)
SizeOffsetType	visitLoadInst (LoadInst &I)
SizeOffsetType	visitPHINode (PHINode &)
SizeOffsetType	visitSelectInst (SelectInst &I)
SizeOffsetType	visitUndefValue (UndefValue &)
SizeOffsetType	visitInstruction (Instruction &I)
Public Member Functions inherited from llvm::InstVisitor< ObjectSizeOffsetVisitor, SizeOffsetType >
void	visit (Iterator Start, Iterator End)
void	visit (Module &M)
void	visit (Function &F)
void	visit (BasicBlock &BB)
void	visit (Module *M)
void	visit (Function *F)
void	visit (BasicBlock *BB)
SizeOffsetType	visit (Instruction *I)
SizeOffsetType	visit (Instruction &I)
void	visitModule (Module &M)
void	visitFunction (Function &F)
void	visitBasicBlock (BasicBlock &BB)
SizeOffsetType	visitICmpInst (ICmpInst &I)
SizeOffsetType	visitFCmpInst (FCmpInst &I)
SizeOffsetType	visitAllocaInst (AllocaInst &I)
SizeOffsetType	visitLoadInst (LoadInst &I)
SizeOffsetType	visitStoreInst (StoreInst &I)
SizeOffsetType	visitAtomicCmpXchgInst (AtomicCmpXchgInst &I)
SizeOffsetType	visitAtomicRMWInst (AtomicRMWInst &I)
SizeOffsetType	visitFenceInst (FenceInst &I)
SizeOffsetType	visitGetElementPtrInst (GetElementPtrInst &I)
SizeOffsetType	visitPHINode (PHINode &I)
SizeOffsetType	visitTruncInst (TruncInst &I)
SizeOffsetType	visitZExtInst (ZExtInst &I)
SizeOffsetType	visitSExtInst (SExtInst &I)
SizeOffsetType	visitFPTruncInst (FPTruncInst &I)
SizeOffsetType	visitFPExtInst (FPExtInst &I)
SizeOffsetType	visitFPToUIInst (FPToUIInst &I)
SizeOffsetType	visitFPToSIInst (FPToSIInst &I)
SizeOffsetType	visitUIToFPInst (UIToFPInst &I)
SizeOffsetType	visitSIToFPInst (SIToFPInst &I)
SizeOffsetType	visitPtrToIntInst (PtrToIntInst &I)
SizeOffsetType	visitIntToPtrInst (IntToPtrInst &I)
SizeOffsetType	visitBitCastInst (BitCastInst &I)
SizeOffsetType	visitAddrSpaceCastInst (AddrSpaceCastInst &I)
SizeOffsetType	visitSelectInst (SelectInst &I)
SizeOffsetType	visitVAArgInst (VAArgInst &I)
SizeOffsetType	visitExtractElementInst (ExtractElementInst &I)
SizeOffsetType	visitInsertElementInst (InsertElementInst &I)
SizeOffsetType	visitShuffleVectorInst (ShuffleVectorInst &I)
SizeOffsetType	visitExtractValueInst (ExtractValueInst &I)
SizeOffsetType	visitInsertValueInst (InsertValueInst &I)
SizeOffsetType	visitLandingPadInst (LandingPadInst &I)
SizeOffsetType	visitFuncletPadInst (FuncletPadInst &I)
SizeOffsetType	visitCleanupPadInst (CleanupPadInst &I)
SizeOffsetType	visitCatchPadInst (CatchPadInst &I)
SizeOffsetType	visitFreezeInst (FreezeInst &I)
SizeOffsetType	visitDbgDeclareInst (DbgDeclareInst &I)
SizeOffsetType	visitDbgValueInst (DbgValueInst &I)
SizeOffsetType	visitDbgVariableIntrinsic (DbgVariableIntrinsic &I)
SizeOffsetType	visitDbgLabelInst (DbgLabelInst &I)
SizeOffsetType	visitDbgInfoIntrinsic (DbgInfoIntrinsic &I)
SizeOffsetType	visitMemSetInst (MemSetInst &I)
SizeOffsetType	visitMemCpyInst (MemCpyInst &I)
SizeOffsetType	visitMemCpyInlineInst (MemCpyInlineInst &I)
SizeOffsetType	visitMemMoveInst (MemMoveInst &I)
SizeOffsetType	visitMemTransferInst (MemTransferInst &I)
SizeOffsetType	visitMemIntrinsic (MemIntrinsic &I)
SizeOffsetType	visitVAStartInst (VAStartInst &I)
SizeOffsetType	visitVAEndInst (VAEndInst &I)
SizeOffsetType	visitVACopyInst (VACopyInst &I)
SizeOffsetType	visitIntrinsicInst (IntrinsicInst &I)
SizeOffsetType	visitCallInst (CallInst &I)
SizeOffsetType	visitInvokeInst (InvokeInst &I)
SizeOffsetType	visitCallBrInst (CallBrInst &I)
SizeOffsetType	visitReturnInst (ReturnInst &I)
SizeOffsetType	visitBranchInst (BranchInst &I)
SizeOffsetType	visitSwitchInst (SwitchInst &I)
SizeOffsetType	visitIndirectBrInst (IndirectBrInst &I)
SizeOffsetType	visitResumeInst (ResumeInst &I)
SizeOffsetType	visitUnreachableInst (UnreachableInst &I)
SizeOffsetType	visitCleanupReturnInst (CleanupReturnInst &I)
SizeOffsetType	visitCatchReturnInst (CatchReturnInst &I)
SizeOffsetType	visitCatchSwitchInst (CatchSwitchInst &I)
SizeOffsetType	visitTerminator (Instruction &I)
SizeOffsetType	visitCastInst (CastInst &I)
SizeOffsetType	visitUnaryOperator (UnaryOperator &I)
SizeOffsetType	visitBinaryOperator (BinaryOperator &I)
SizeOffsetType	visitCmpInst (CmpInst &I)
SizeOffsetType	visitUnaryInstruction (UnaryInstruction &I)
SizeOffsetType	visitCallBase (CallBase &I)
void	visitInstruction (Instruction &I)

Static Public Member Functions
static bool	knownSize (const SizeOffsetType &SizeOffset)
static bool	knownOffset (const SizeOffsetType &SizeOffset)
static bool	bothKnown (const SizeOffsetType &SizeOffset)

Detailed Description

Evaluate the size and offset of an object pointed to by a Value* statically.

Fails if size or offset are not known at compile time.

Definition at line 185 of file MemoryBuiltins.h.

Constructor & Destructor Documentation

ObjectSizeOffsetVisitor()

ObjectSizeOffsetVisitor::ObjectSizeOffsetVisitor	(	const DataLayout &	DL,
		const TargetLibraryInfo *	TLI,
		LLVMContext &	Context,
		ObjectSizeOpts	Options = {}
	)

Definition at line 655 of file MemoryBuiltins.cpp.

Member Function Documentation

bothKnown()

static bool llvm::ObjectSizeOffsetVisitor::bothKnown ( const SizeOffsetType &  SizeOffset )

inlinestatic

Definition at line 214 of file MemoryBuiltins.h.

References knownOffset(), and knownSize().

Referenced by llvm::getObjectSize(), and visitLoadInst().

compute()

SizeOffsetType ObjectSizeOffsetVisitor::compute

(

Value *

V

)

Definition at line 664 of file MemoryBuiltins.cpp.

References llvm::DataLayout::getIndexTypeSizeInBits(), llvm::Value::getType(), llvm::APInt::getZero(), knownOffset(), knownSize(), and llvm::Value::stripAndAccumulateConstantOffsets().

Referenced by llvm::getObjectSize(), visitGlobalAlias(), visitPHINode(), and visitSelectInst().

knownOffset()

static bool llvm::ObjectSizeOffsetVisitor::knownOffset ( const SizeOffsetType &  SizeOffset )

inlinestatic

Definition at line 210 of file MemoryBuiltins.h.

Referenced by bothKnown(), and compute().

knownSize()

static bool llvm::ObjectSizeOffsetVisitor::knownSize ( const SizeOffsetType &  SizeOffset )

inlinestatic

Definition at line 206 of file MemoryBuiltins.h.

Referenced by bothKnown(), and compute().

visitAllocaInst()

SizeOffsetType ObjectSizeOffsetVisitor::visitAllocaInst

(

AllocaInst &

I

)

Definition at line 729 of file MemoryBuiltins.cpp.

References llvm::ObjectSizeOpts::EvalMode, llvm::TypeSize::getKnownMinSize(), llvm::DataLayout::getTypeAllocSize(), I, llvm::LinearPolySize< LeafTy >::isScalable(), and llvm::ObjectSizeOpts::Min.

visitArgument()

SizeOffsetType ObjectSizeOffsetVisitor::visitArgument

(

Argument &

A

)

Definition at line 754 of file MemoryBuiltins.cpp.

References llvm::DataLayout::getTypeAllocSize(), and llvm::Type::isSized().

visitCallBase()

SizeOffsetType ObjectSizeOffsetVisitor::visitCallBase

(

CallBase &

CB

)

Definition at line 766 of file MemoryBuiltins.cpp.

References llvm::getAllocSize().

visitConstantPointerNull()

SizeOffsetType ObjectSizeOffsetVisitor::visitConstantPointerNull

(

ConstantPointerNull &

CPN

)

Definition at line 774 of file MemoryBuiltins.cpp.

References llvm::PointerType::getAddressSpace(), llvm::ConstantPointerNull::getType(), and llvm::ObjectSizeOpts::NullIsUnknownSize.

visitExtractElementInst()

SizeOffsetType ObjectSizeOffsetVisitor::visitExtractElementInst

(

ExtractElementInst &

I

)

Definition at line 788 of file MemoryBuiltins.cpp.

visitExtractValueInst()

SizeOffsetType ObjectSizeOffsetVisitor::visitExtractValueInst

(

ExtractValueInst &

I

)

Definition at line 793 of file MemoryBuiltins.cpp.

visitGlobalAlias()

SizeOffsetType ObjectSizeOffsetVisitor::visitGlobalAlias

(

GlobalAlias &

GA

)

Definition at line 798 of file MemoryBuiltins.cpp.

References compute(), llvm::GlobalAlias::getAliasee(), and llvm::GlobalValue::isInterposable().

visitGlobalVariable()

SizeOffsetType ObjectSizeOffsetVisitor::visitGlobalVariable

(

GlobalVariable &

GV

)

Definition at line 804 of file MemoryBuiltins.cpp.

References llvm::GlobalObject::getAlign(), llvm::DataLayout::getTypeAllocSize(), llvm::GlobalValue::getValueType(), and llvm::GlobalVariable::hasDefinitiveInitializer().

visitInstruction()

SizeOffsetType ObjectSizeOffsetVisitor::visitInstruction

(

Instruction &

I

)

Definition at line 978 of file MemoryBuiltins.cpp.

References llvm::dbgs(), I, and LLVM_DEBUG.

visitIntToPtrInst()

SizeOffsetType ObjectSizeOffsetVisitor::visitIntToPtrInst

(

IntToPtrInst &

)

Definition at line 812 of file MemoryBuiltins.cpp.

visitLoadInst()

SizeOffsetType ObjectSizeOffsetVisitor::visitLoadInst

(

LoadInst &

I

)

Definition at line 927 of file MemoryBuiltins.cpp.

References llvm::ObjectSizeOpts::AA, bothKnown(), and llvm::Instruction::getParent().

visitPHINode()

SizeOffsetType ObjectSizeOffsetVisitor::visitPHINode

(

PHINode &

PN

)

Definition at line 960 of file MemoryBuiltins.cpp.

References compute(), llvm::PHINode::incoming_values(), and LHS.

visitSelectInst()

SizeOffsetType ObjectSizeOffsetVisitor::visitSelectInst

(

SelectInst &

I

)

Definition at line 969 of file MemoryBuiltins.cpp.

References compute(), and I.

visitUndefValue()

SizeOffsetType ObjectSizeOffsetVisitor::visitUndefValue

(

UndefValue &

)

Definition at line 974 of file MemoryBuiltins.cpp.

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

• include/llvm/Analysis/MemoryBuiltins.h
• lib/Analysis/MemoryBuiltins.cpp