¶bool isKnownToBeAPowerOfTwo(
    const llvm::Value* V,
    const llvm::DataLayout& DL,
    bool OrZero = false,
    unsigned int Depth = 0,
    llvm::AssumptionCache* AC = nullptr,
    const llvm::Instruction* CxtI = nullptr,
    const llvm::DominatorTree* DT = nullptr,
    bool UseInstrInfo = true)

Description

Return true if the given value is known to have exactly one bit set when defined. For vectors return true if every element is known to be a power of two when defined. Supports values with integer or pointer type and vectors of integers. If 'OrZero' is set, then return true if the given value is either a power of two or zero.

Declared at: llvm/include/llvm/Analysis/ValueTracking.h:89

Parameters

const llvm::Value* V

const llvm::DataLayout& DL

bool OrZero = false

unsigned int Depth = 0

llvm::AssumptionCache* AC = nullptr

const llvm::Instruction* CxtI = nullptr

const llvm::DominatorTree* DT = nullptr

bool UseInstrInfo = true