diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h index a22ed8294cd..23dd482b7d1 100644 --- a/include/llvm/ADT/APInt.h +++ b/include/llvm/ADT/APInt.h @@ -463,12 +463,12 @@ public: /// if isSign == true, it should be largest signed value, otherwise largest /// unsigned value. /// @brief Gets max value of the APInt with bitwidth <= 64. - static APInt getMaxValue(uint32_t numBits, bool isSign); + static APInt getMaxValue(uint32_t numBits, bool isSigned); /// @returns the smallest value for an APInt of the given bit-width and /// if isSign == true, it should be smallest signed value, otherwise zero. /// @brief Gets min value of the APInt with bitwidth <= 64. - static APInt getMinValue(uint32_t numBits, bool isSign); + static APInt getMinValue(uint32_t numBits, bool isSigned); /// @returns the all-ones value for an APInt of the specified bit-width. /// @brief Get the all-ones value. @@ -484,6 +484,42 @@ public: return countLeadingZeros() != BitWidth; } + /// This checks to see if the value has all bits of the APInt are set or not. + /// @brief Determine if all bits are set + inline bool isAllOnesValue() const { + return countPopulation() == BitWidth; + } + + /// This checks to see if the value of this APInt is the maximum unsigned + /// value for the APInt's bit width. + /// @brief Determine if this is the largest unsigned value. + bool isMaxValue() const { + return countPopulation() == BitWidth; + } + + /// This checks to see if the value of this APInt is the maximum signed + /// value for the APInt's bit width. + /// @brief Determine if this is the largest signed value. + bool isMaxSignedValue() const { + return BitWidth == 1 ? VAL == 0 : + !isNegative() && countPopulation() == BitWidth - 1; + } + + /// This checks to see if the value of this APInt is the minimum signed + /// value for the APInt's bit width. + /// @brief Determine if this is the smallest unsigned value. + bool isMinValue() const { + return countPopulation() == 0; + } + + /// This checks to see if the value of this APInt is the minimum signed + /// value for the APInt's bit width. + /// @brief Determine if this is the smallest signed value. + bool isMinSignedValue() const { + return BitWidth == 1 ? VAL == 1 : + isNegative() && countPopulation() == 1; + } + /// @returns a character interpretation of the APInt. std::string toString(uint8_t radix = 10, bool wantSigned = true) const;