ValueEvolution Class Reference

A much simpler version of ValueTracking, in that it computes KnownBits of values, except that it computes the evolution of KnownBits in a loop with a given trip count, and predication is specialized for a significant-bit check. More...

Public Member Functions
	ValueEvolution (unsigned TripCount, bool ByteOrderSwapped)
bool	computeEvolutions (ArrayRef< PhiStepPair > PhiEvolutions)
StringRef	getError () const

Public Attributes
SmallPtrSet< const Instruction *, 16 >	Visited
KnownPhiMap	KnownPhis

Detailed Description

A much simpler version of ValueTracking, in that it computes KnownBits of values, except that it computes the evolution of KnownBits in a loop with a given trip count, and predication is specialized for a significant-bit check.

Definition at line 88 of file HashRecognize.cpp.

Constructor & Destructor Documentation

ValueEvolution()

ValueEvolution::ValueEvolution	(	unsigned	TripCount,
		bool	ByteOrderSwapped
	)

Definition at line 127 of file HashRecognize.cpp.

Member Function Documentation

computeEvolutions()

bool ValueEvolution::computeEvolutions

(

ArrayRef< PhiStepPair >

PhiEvolutions

)

Definition at line 266 of file HashRecognize.cpp.

References llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::emplace_or_assign(), llvm::StringRef::empty(), I, and KnownPhis.

Referenced by llvm::HashRecognize::recognizeCRC().

getError()

StringRef ValueEvolution::getError ( ) const

inline

Definition at line 116 of file HashRecognize.cpp.

Referenced by llvm::HashRecognize::recognizeCRC().

Member Data Documentation

KnownPhis

KnownPhiMap ValueEvolution::KnownPhis

Definition at line 124 of file HashRecognize.cpp.

Referenced by computeEvolutions(), and llvm::HashRecognize::recognizeCRC().

Visited

SmallPtrSet<const Instruction *, 16> ValueEvolution::Visited

Definition at line 120 of file HashRecognize.cpp.

Referenced by llvm::HashRecognize::recognizeCRC().

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

• lib/Analysis/HashRecognize.cpp