LLVM API Documentation

llvm::SCEVUnknown Class Reference

#include <ScalarEvolutionExpressions.h>

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List of all members.

Public Member Functions

ValuegetValue () const
virtual bool isLoopInvariant (const Loop *L) const
virtual bool hasComputableLoopEvolution (const Loop *QL) const
SCEVHandle replaceSymbolicValuesWithConcrete (const SCEVHandle &Sym, const SCEVHandle &Conc) const
virtual const TypegetType () const
virtual void print (std::ostream &OS) const

Static Public Member Functions

static SCEVHandle get (Value *V)
static SCEVHandle getIntegerSCEV (int Val, const Type *Ty)
static bool classof (const SCEVUnknown *S)
 Methods for support type inquiry through isa, cast, and dyn_cast:.
static bool classof (const SCEV *S)

Protected Member Functions

 ~SCEVUnknown ()

Detailed Description

SCEVUnknown - This means that we are dealing with an entirely unknown SCEV value, and only represent it as it's LLVM Value. This is the "bottom" value for the analysis.

Definition at line 444 of file ScalarEvolutionExpressions.h.


Constructor & Destructor Documentation

SCEVUnknown::~SCEVUnknown (  )  [protected]

Definition at line 371 of file ScalarEvolution.cpp.


Member Function Documentation

SCEVHandle SCEVUnknown::get ( Value V  )  [static]

get method - For SCEVUnknown, this just gets and returns a new SCEVUnknown.

Definition at line 1049 of file ScalarEvolution.cpp.

References llvm::SCEVConstant::get().

Referenced by llvm::SCEVSDivExpr::get(), llvm::SCEVZeroExtendExpr::get(), llvm::SCEVTruncateExpr::get(), getIntegerSCEV(), llvm::SCEV::getNegativeSCEV(), llvm::SCEVAddRecExpr::getNumIterationsInRange(), PartialFact(), and llvm::SCEVExpander::visitAddRecExpr().

SCEVHandle SCEVUnknown::getIntegerSCEV ( int  Val,
const Type Ty 
) [static]

getIntegerSCEV - Given an integer or FP type, create a constant for the specified signed integer value and return a SCEV for the constant.

Definition at line 456 of file ScalarEvolution.cpp.

References C, get(), llvm::ConstantSInt::get(), llvm::ConstantFP::get(), llvm::ConstantExpr::getCast(), llvm::Constant::getNullValue(), llvm::Type::isFloatingPoint(), and Ty.

Referenced by llvm::SCEVAddRecExpr::evaluateAtIteration(), llvm::SCEVAddExpr::get(), llvm::SCEV::getNegativeSCEV(), llvm::SCEVAddRecExpr::getNumIterationsInRange(), llvm::SCEVExpander::getOrInsertCanonicalInductionVariable(), PartialFact(), and llvm::SCEVExpander::visitAddRecExpr().

Value* llvm::SCEVUnknown::getValue (  )  const [inline]

Definition at line 459 of file ScalarEvolutionExpressions.h.

Referenced by llvm::SCEVExpander::visitUnknown().

bool SCEVUnknown::isLoopInvariant ( const Loop L  )  const [virtual]

isLoopInvariant - Return true if the value of this SCEV is unchanging in the specified loop.

Implements llvm::SCEV.

Definition at line 373 of file ScalarEvolution.cpp.

References llvm::Loop::contains().

virtual bool llvm::SCEVUnknown::hasComputableLoopEvolution ( const Loop QL  )  const [inline, virtual]

hasComputableLoopEvolution - Return true if this SCEV changes value in a known way in the specified loop. This property being true implies that the value is variant in the loop AND that we can emit an expression to compute the value of the expression at any particular loop iteration.

Implements llvm::SCEV.

Definition at line 462 of file ScalarEvolutionExpressions.h.

SCEVHandle llvm::SCEVUnknown::replaceSymbolicValuesWithConcrete ( const SCEVHandle Sym,
const SCEVHandle Conc 
) const [inline, virtual]

replaceSymbolicValuesWithConcrete - If this SCEV internally references the symbolic value "Sym", construct and return a new SCEV that produces the same value, but which uses the concrete value Conc instead of the symbolic value. If this SCEV does not use the symbolic value, it returns itself.

Implements llvm::SCEV.

Definition at line 466 of file ScalarEvolutionExpressions.h.

const Type * SCEVUnknown::getType (  )  const [virtual]

getType - Return the LLVM type of this SCEV expression.

Implements llvm::SCEV.

Definition at line 381 of file ScalarEvolution.cpp.

References llvm::Value::getType().

void SCEVUnknown::print ( std::ostream &  OS  )  const [virtual]

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

Implements llvm::SCEV.

Definition at line 385 of file ScalarEvolution.cpp.

References llvm::WriteAsOperand().

static bool llvm::SCEVUnknown::classof ( const SCEVUnknown S  )  [inline, static]

Methods for support type inquiry through isa, cast, and dyn_cast:.

Definition at line 477 of file ScalarEvolutionExpressions.h.

static bool llvm::SCEVUnknown::classof ( const SCEV S  )  [inline, static]

Definition at line 478 of file ScalarEvolutionExpressions.h.

References llvm::SCEV::getSCEVType(), and llvm::scUnknown.


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