class SCEV

Declaration

class SCEV : public Node { /* full declaration omitted */ };

Description

This class represents an analyzed expression in the program. These are opaque objects that the client is not allowed to do much with directly.

Declared at: llvm/include/llvm/Analysis/ScalarEvolution.h:75

Inherits from: FoldingSetBase::Node

Member Variables

private llvm::FoldingSetNodeIDRef FastID

A reference to an Interned FoldingSetNodeID for this node. The ScalarEvolution's BumpPtrAllocator holds the data.

private const llvm::SCEVTypes SCEVType

protected const unsigned short ExpressionSize

protected unsigned short SubclassData = 0

This field is initialized to zero and may be used in subclasses to store miscellaneous information.

Method Overview

• public SCEV(const llvm::FoldingSetNodeIDRef ID, llvm::SCEVTypes SCEVTy, unsigned short ExpressionSize)
• public SCEV(const llvm::SCEV &)
• public void dump() const
• public unsigned short getExpressionSize() const
• public llvm::SCEVTypes getSCEVType() const
• public llvm::Type * getType() const
• public bool isAllOnesValue() const
• public bool isNonConstantNegative() const
• public bool isOne() const
• public bool isZero() const
• public void print(llvm::raw_ostream & OS) const

Inherited from FoldingSetBase::Node:

• public SetNextInBucket
• public getNextInBucket

Methods

¶SCEV(const llvm::FoldingSetNodeIDRef ID,
     llvm::SCEVTypes SCEVTy,
     unsigned short ExpressionSize)

Declared at: llvm/include/llvm/Analysis/ScalarEvolution.h:138

Parameters

const llvm::FoldingSetNodeIDRef ID

llvm::SCEVTypes SCEVTy

unsigned short ExpressionSize

¶SCEV(const llvm::SCEV&)

Declared at: llvm/include/llvm/Analysis/ScalarEvolution.h:141

Parameters

const llvm::SCEV&

¶void dump() const

Description

This method is used for debugging.

Declared at: llvm/include/llvm/Analysis/ScalarEvolution.h:179

¶unsigned short getExpressionSize() const

Declared at: llvm/include/llvm/Analysis/ScalarEvolution.h:170

¶llvm::SCEVTypes getSCEVType() const

Declared at: llvm/include/llvm/Analysis/ScalarEvolution.h:144

¶llvm::Type* getType() const

Description

Return the LLVM type of this SCEV expression.

Declared at: llvm/include/llvm/Analysis/ScalarEvolution.h:147

¶bool isAllOnesValue() const

Description

Return true if the expression is a constant all-ones value.

Declared at: llvm/include/llvm/Analysis/ScalarEvolution.h:156

¶bool isNonConstantNegative() const

Description

Return true if the specified scev is negated, but not a constant.

Declared at: llvm/include/llvm/Analysis/ScalarEvolution.h:159

¶bool isOne() const

Description

Return true if the expression is a constant one.

Declared at: llvm/include/llvm/Analysis/ScalarEvolution.h:153

¶bool isZero() const

Description

Return true if the expression is a constant zero.

Declared at: llvm/include/llvm/Analysis/ScalarEvolution.h:150

¶void print(llvm::raw_ostream& OS) const

Description

Print out the internal representation of this scalar to the specified stream. This should really only be used for debugging purposes.

Declared at: llvm/include/llvm/Analysis/ScalarEvolution.h:176

Parameters

llvm::raw_ostream& OS