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Annotate APInt methods where it's not clear whether they are in place with warn_unused_result.
Fix ScalarEvolution bugs uncovered by this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194928 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -765,7 +765,9 @@ public:
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return APInt(getBitWidth(), VAL & RHS.VAL);
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return AndSlowCase(RHS);
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}
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APInt And(const APInt &RHS) const { return this->operator&(RHS); }
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT And(const APInt &RHS) const {
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return this->operator&(RHS);
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}
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/// \brief Bitwise OR operator.
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///
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@ -785,7 +787,9 @@ public:
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/// calling operator|.
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///
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/// \returns An APInt value representing the bitwise OR of *this and RHS.
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APInt Or(const APInt &RHS) const { return this->operator|(RHS); }
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT Or(const APInt &RHS) const {
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return this->operator|(RHS);
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}
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/// \brief Bitwise XOR operator.
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///
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@ -805,7 +809,9 @@ public:
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/// through the usage of operator^.
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///
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/// \returns An APInt value representing the bitwise XOR of *this and RHS.
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APInt Xor(const APInt &RHS) const { return this->operator^(RHS); }
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT Xor(const APInt &RHS) const {
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return this->operator^(RHS);
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}
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/// \brief Multiplication operator.
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///
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@ -837,17 +843,17 @@ public:
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/// \brief Arithmetic right-shift function.
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///
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/// Arithmetic right-shift this APInt by shiftAmt.
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APInt ashr(unsigned shiftAmt) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT ashr(unsigned shiftAmt) const;
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/// \brief Logical right-shift function.
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///
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/// Logical right-shift this APInt by shiftAmt.
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APInt lshr(unsigned shiftAmt) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT lshr(unsigned shiftAmt) const;
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/// \brief Left-shift function.
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///
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/// Left-shift this APInt by shiftAmt.
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APInt shl(unsigned shiftAmt) const {
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT shl(unsigned shiftAmt) const {
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assert(shiftAmt <= BitWidth && "Invalid shift amount");
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if (isSingleWord()) {
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if (shiftAmt >= BitWidth)
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@ -858,31 +864,31 @@ public:
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}
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/// \brief Rotate left by rotateAmt.
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APInt rotl(unsigned rotateAmt) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT rotl(unsigned rotateAmt) const;
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/// \brief Rotate right by rotateAmt.
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APInt rotr(unsigned rotateAmt) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT rotr(unsigned rotateAmt) const;
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/// \brief Arithmetic right-shift function.
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///
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/// Arithmetic right-shift this APInt by shiftAmt.
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APInt ashr(const APInt &shiftAmt) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT ashr(const APInt &shiftAmt) const;
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/// \brief Logical right-shift function.
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///
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/// Logical right-shift this APInt by shiftAmt.
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APInt lshr(const APInt &shiftAmt) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT lshr(const APInt &shiftAmt) const;
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/// \brief Left-shift function.
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///
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/// Left-shift this APInt by shiftAmt.
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APInt shl(const APInt &shiftAmt) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT shl(const APInt &shiftAmt) const;
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/// \brief Rotate left by rotateAmt.
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APInt rotl(const APInt &rotateAmt) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT rotl(const APInt &rotateAmt) const;
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/// \brief Rotate right by rotateAmt.
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APInt rotr(const APInt &rotateAmt) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT rotr(const APInt &rotateAmt) const;
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/// \brief Unsigned division operation.
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///
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@ -890,12 +896,12 @@ public:
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/// RHS are treated as unsigned quantities for purposes of this division.
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///
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/// \returns a new APInt value containing the division result
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APInt udiv(const APInt &RHS) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT udiv(const APInt &RHS) const;
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/// \brief Signed division function for APInt.
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///
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/// Signed divide this APInt by APInt RHS.
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APInt sdiv(const APInt &RHS) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT sdiv(const APInt &RHS) const;
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/// \brief Unsigned remainder operation.
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///
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@ -906,12 +912,12 @@ public:
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/// is *this.
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///
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/// \returns a new APInt value containing the remainder result
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APInt urem(const APInt &RHS) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT urem(const APInt &RHS) const;
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/// \brief Function for signed remainder operation.
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///
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/// Signed remainder operation on APInt.
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APInt srem(const APInt &RHS) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT srem(const APInt &RHS) const;
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/// \brief Dual division/remainder interface.
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///
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@ -1145,7 +1151,7 @@ public:
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///
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/// Truncate the APInt to a specified width. It is an error to specify a width
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/// that is greater than or equal to the current width.
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APInt trunc(unsigned width) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT trunc(unsigned width) const;
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/// \brief Sign extend to a new width.
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///
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@ -1153,38 +1159,38 @@ public:
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/// bit is set, the fill on the left will be done with 1 bits, otherwise zero.
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/// It is an error to specify a width that is less than or equal to the
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/// current width.
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APInt sext(unsigned width) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT sext(unsigned width) const;
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/// \brief Zero extend to a new width.
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///
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/// This operation zero extends the APInt to a new width. The high order bits
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/// are filled with 0 bits. It is an error to specify a width that is less
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/// than or equal to the current width.
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APInt zext(unsigned width) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT zext(unsigned width) const;
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/// \brief Sign extend or truncate to width
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///
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/// Make this APInt have the bit width given by \p width. The value is sign
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/// extended, truncated, or left alone to make it that width.
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APInt sextOrTrunc(unsigned width) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT sextOrTrunc(unsigned width) const;
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/// \brief Zero extend or truncate to width
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///
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/// Make this APInt have the bit width given by \p width. The value is zero
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/// extended, truncated, or left alone to make it that width.
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APInt zextOrTrunc(unsigned width) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT zextOrTrunc(unsigned width) const;
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/// \brief Sign extend or truncate to width
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///
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/// Make this APInt have the bit width given by \p width. The value is sign
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/// extended, or left alone to make it that width.
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APInt sextOrSelf(unsigned width) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT sextOrSelf(unsigned width) const;
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/// \brief Zero extend or truncate to width
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///
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/// Make this APInt have the bit width given by \p width. The value is zero
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/// extended, or left alone to make it that width.
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APInt zextOrSelf(unsigned width) const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT zextOrSelf(unsigned width) const;
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/// @}
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/// \name Bit Manipulation Operators
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@ -1421,7 +1427,7 @@ public:
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std::string toString(unsigned Radix, bool Signed) const;
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/// \returns a byte-swapped representation of this APInt Value.
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APInt byteSwap() const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT byteSwap() const;
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/// \brief Converts this APInt to a double value.
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double roundToDouble(bool isSigned) const;
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@ -1464,7 +1470,7 @@ public:
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///
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/// The conversion does not do a translation from double to integer, it just
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/// re-interprets the bits of the double.
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static APInt doubleToBits(double V) {
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static APInt LLVM_ATTRIBUTE_UNUSED_RESULT doubleToBits(double V) {
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union {
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uint64_t I;
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double D;
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@ -1477,7 +1483,7 @@ public:
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///
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/// The conversion does not do a translation from float to integer, it just
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/// re-interprets the bits of the float.
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static APInt floatToBits(float V) {
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static APInt LLVM_ATTRIBUTE_UNUSED_RESULT floatToBits(float V) {
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union {
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unsigned I;
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float F;
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@ -1507,12 +1513,12 @@ public:
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}
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/// \brief Compute the square root
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APInt sqrt() const;
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT sqrt() const;
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/// \brief Get the absolute value;
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///
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/// If *this is < 0 then return -(*this), otherwise *this;
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APInt abs() const {
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APInt LLVM_ATTRIBUTE_UNUSED_RESULT abs() const {
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if (isNegative())
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return -(*this);
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return *this;
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@ -68,18 +68,18 @@ public:
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}
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using APInt::toString;
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APSInt trunc(uint32_t width) const {
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APSInt LLVM_ATTRIBUTE_UNUSED_RESULT trunc(uint32_t width) const {
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return APSInt(APInt::trunc(width), IsUnsigned);
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}
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APSInt extend(uint32_t width) const {
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APSInt LLVM_ATTRIBUTE_UNUSED_RESULT extend(uint32_t width) const {
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if (IsUnsigned)
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return APSInt(zext(width), IsUnsigned);
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else
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return APSInt(sext(width), IsUnsigned);
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}
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APSInt extOrTrunc(uint32_t width) const {
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APSInt LLVM_ATTRIBUTE_UNUSED_RESULT extOrTrunc(uint32_t width) const {
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if (IsUnsigned)
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return APSInt(zextOrTrunc(width), IsUnsigned);
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else
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@ -212,7 +212,7 @@ public:
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assert(IsUnsigned == RHS.IsUnsigned && "Signedness mismatch!");
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return APSInt(static_cast<const APInt&>(*this) & RHS, IsUnsigned);
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}
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APSInt And(const APSInt& RHS) const {
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APSInt LLVM_ATTRIBUTE_UNUSED_RESULT And(const APSInt& RHS) const {
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return this->operator&(RHS);
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}
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@ -220,7 +220,7 @@ public:
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assert(IsUnsigned == RHS.IsUnsigned && "Signedness mismatch!");
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return APSInt(static_cast<const APInt&>(*this) | RHS, IsUnsigned);
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}
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APSInt Or(const APSInt& RHS) const {
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APSInt LLVM_ATTRIBUTE_UNUSED_RESULT Or(const APSInt& RHS) const {
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return this->operator|(RHS);
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}
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@ -229,7 +229,7 @@ public:
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assert(IsUnsigned == RHS.IsUnsigned && "Signedness mismatch!");
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return APSInt(static_cast<const APInt&>(*this) ^ RHS, IsUnsigned);
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}
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APSInt Xor(const APSInt& RHS) const {
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APSInt LLVM_ATTRIBUTE_UNUSED_RESULT Xor(const APSInt& RHS) const {
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return this->operator^(RHS);
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}
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@ -6684,9 +6684,9 @@ static const APInt gcd(const SCEVConstant *C1, const SCEVConstant *C2) {
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uint32_t BBW = B.getBitWidth();
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if (ABW > BBW)
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B.zext(ABW);
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B = B.zext(ABW);
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else if (ABW < BBW)
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A.zext(BBW);
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A = A.zext(BBW);
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return APIntOps::GreatestCommonDivisor(A, B);
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}
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@ -6698,9 +6698,9 @@ static const APInt srem(const SCEVConstant *C1, const SCEVConstant *C2) {
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uint32_t BBW = B.getBitWidth();
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if (ABW > BBW)
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B.sext(ABW);
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B = B.sext(ABW);
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else if (ABW < BBW)
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A.sext(BBW);
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A = A.sext(BBW);
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return APIntOps::srem(A, B);
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}
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@ -6712,9 +6712,9 @@ static const APInt sdiv(const SCEVConstant *C1, const SCEVConstant *C2) {
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uint32_t BBW = B.getBitWidth();
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if (ABW > BBW)
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B.sext(ABW);
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B = B.sext(ABW);
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else if (ABW < BBW)
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A.sext(BBW);
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A = A.sext(BBW);
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return APIntOps::sdiv(A, B);
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}
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