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:

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

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 268 of file MemoryBuiltins.h.

Constructor & Destructor Documentation

ObjectSizeOffsetVisitor()

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

Definition at line 798 of file MemoryBuiltins.cpp.

Member Function Documentation

compute()

SizeOffsetAPInt ObjectSizeOffsetVisitor::compute

(

Value *

V

)

Definition at line 807 of file MemoryBuiltins.cpp.

References llvm::OffsetSpan::After, llvm::OffsetSpan::Before, llvm::OffsetSpan::bothKnown(), llvm::ObjectSizeOpts::ExactSizeFromOffset, llvm::APInt::getBitWidth(), llvm::APInt::getZero(), llvm::OffsetSpan::knownAfter(), and llvm::OffsetSpan::knownBefore().

Referenced by llvm::getObjectSize().

visitAllocaInst()

OffsetSpan ObjectSizeOffsetVisitor::visitAllocaInst

(

AllocaInst &

I

)

Definition at line 947 of file MemoryBuiltins.cpp.

References aggregatePossibleConstantValues(), llvm::details::FixedOrScalableQuantity< LeafTy, ValueTy >::getKnownMinValue(), I, llvm::details::FixedOrScalableQuantity< LeafTy, ValueTy >::isScalable(), llvm::isUIntN(), llvm::ObjectSizeOpts::Min, and Size.

visitArgument()

OffsetSpan ObjectSizeOffsetVisitor::visitArgument

(

Argument &

A

)

Definition at line 974 of file MemoryBuiltins.cpp.

References A(), llvm::Type::isSized(), and Size.

visitCallBase()

OffsetSpan ObjectSizeOffsetVisitor::visitCallBase

(

CallBase &

CB

)

Definition at line 986 of file MemoryBuiltins.cpp.

References aggregatePossibleConstantValues(), llvm::getAllocSize(), and Size.

visitConstantPointerNull()

OffsetSpan ObjectSizeOffsetVisitor::visitConstantPointerNull

(

ConstantPointerNull &

CPN

)

Definition at line 1008 of file MemoryBuiltins.cpp.

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

visitExtractElementInst()

OffsetSpan ObjectSizeOffsetVisitor::visitExtractElementInst

(

ExtractElementInst &

I

)

Definition at line 1022 of file MemoryBuiltins.cpp.

visitExtractValueInst()

OffsetSpan ObjectSizeOffsetVisitor::visitExtractValueInst

(

ExtractValueInst &

I

)

Definition at line 1026 of file MemoryBuiltins.cpp.

visitGlobalAlias()

OffsetSpan ObjectSizeOffsetVisitor::visitGlobalAlias

(

GlobalAlias &

GA

)

Definition at line 1031 of file MemoryBuiltins.cpp.

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

visitGlobalVariable()

OffsetSpan ObjectSizeOffsetVisitor::visitGlobalVariable

(

GlobalVariable &

GV

)

Definition at line 1037 of file MemoryBuiltins.cpp.

References llvm::GlobalVariable::getAlign(), llvm::GlobalValue::getValueType(), llvm::GlobalValue::hasExternalWeakLinkage(), llvm::GlobalVariable::hasInitializer(), llvm::GlobalValue::isInterposable(), llvm::Type::isSized(), llvm::ObjectSizeOpts::Min, and Size.

visitInstruction()

OffsetSpan ObjectSizeOffsetVisitor::visitInstruction

(

Instruction &

I

)

Definition at line 1223 of file MemoryBuiltins.cpp.

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

visitIntToPtrInst()

OffsetSpan ObjectSizeOffsetVisitor::visitIntToPtrInst

(

IntToPtrInst &

)

Definition at line 1047 of file MemoryBuiltins.cpp.

visitLoadInst()

OffsetSpan ObjectSizeOffsetVisitor::visitLoadInst

(

LoadInst &

I

)

Definition at line 1165 of file MemoryBuiltins.cpp.

References llvm::OffsetSpan::bothKnown(), and llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent().

visitPHINode()

OffsetSpan ObjectSizeOffsetVisitor::visitPHINode

(

PHINode &

PN

)

Definition at line 1203 of file MemoryBuiltins.cpp.

References llvm::PHINode::getNumIncomingValues(), and llvm::PHINode::incoming_values().

visitSelectInst()

OffsetSpan ObjectSizeOffsetVisitor::visitSelectInst

(

SelectInst &

I

)

Definition at line 1214 of file MemoryBuiltins.cpp.

References I.

visitUndefValue()

OffsetSpan ObjectSizeOffsetVisitor::visitUndefValue

(

UndefValue &

)

Definition at line 1219 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