#include <iosfwd>
namespace llvm {
-class Constant;
-class ConstantInt;
-class Type;
class ConstantRange {
APInt Lower, Upper;
static ConstantRange intersect1Wrapped(const ConstantRange &LHS,
- const ConstantRange &RHS, bool sign);
+ const ConstantRange &RHS);
public:
- /// Initialize a full (the default) or empty set for the specified type.
+ /// Initialize a full (the default) or empty set for the specified bit width.
///
- ConstantRange(const Type *Ty, bool isFullSet = true);
+ ConstantRange(uint32_t BitWidth, bool isFullSet = true);
/// Initialize a range to hold the single specified value.
///
- ConstantRange(Constant *Value);
+ ConstantRange(const APInt &Value);
- /// Initialize a range of values explicitly... this will assert out if
- /// Lower==Upper and Lower != Min or Max for its type, if the two constants
- /// have different types, or if the constant are not integral values.
- ///
- ConstantRange(Constant *Lower, Constant *Upper);
-
- /// @brief Initialize a range of values explicitly.
+ /// @brief Initialize a range of values explicitly. This will assert out if
+ /// Lower==Upper and Lower != Min or Max value for its type. It will also
+ /// assert out if the two APInt's are not the same bit width.
ConstantRange(const APInt& Lower, const APInt& Upper);
- /// Initialize a set of values that all satisfy the predicate with C. The
- /// predicate should be either an ICmpInst::Predicate or FCmpInst::Predicate
- /// value.
- /// @brief Get a range for a relation with a constant integral.
- ConstantRange(unsigned short predicate, ConstantInt *C);
-
/// getLower - Return the lower value for this range...
///
- ConstantInt *getLower() const;
+ const APInt &getLower() const { return Lower; }
/// getUpper - Return the upper value for this range...
///
- ConstantInt *getUpper() const;
+ const APInt &getUpper() const { return Upper; }
- /// getType - Return the LLVM data type of this range.
+ /// getBitWidth - get the bit width of this ConstantRange
///
- const Type *getType() const;
+ uint32_t getBitWidth() const { return Lower.getBitWidth(); }
/// isFullSet - Return true if this set contains all of the elements possible
/// for this data-type
/// isWrappedSet - Return true if this set wraps around the top of the range,
/// for example: [100, 8)
///
- bool isWrappedSet(bool isSigned) const;
+ bool isWrappedSet() const;
/// contains - Return true if the specified value is in the set.
- /// The isSigned parameter indicates whether the comparisons should be
- /// performed as if the values are signed or not.
///
- bool contains(ConstantInt *Val, bool isSigned) const;
+ bool contains(const APInt &Val) const;
/// getSingleElement - If this set contains a single element, return it,
/// otherwise return null.
///
- ConstantInt *getSingleElement() const;
+ const APInt *getSingleElement() const {
+ if (Upper == Lower + 1)
+ return &Lower;
+ return 0;
+ }
/// isSingleElement - Return true if this set contains exactly one member.
///
///
APInt getSetSize() const;
+ /// getUnsignedMax - Return the largest unsigned value contained in the
+ /// ConstantRange.
+ ///
+ APInt getUnsignedMax() const;
+
+ /// getUnsignedMin - Return the smallest unsigned value contained in the
+ /// ConstantRange.
+ ///
+ APInt getUnsignedMin() const;
+
+ /// getSignedMax - Return the largest signed value contained in the
+ /// ConstantRange.
+ ///
+ APInt getSignedMax() const;
+
+ /// getSignedMin - Return the smallest signed value contained in the
+ /// ConstantRange.
+ ///
+ APInt getSignedMin() const;
+
/// operator== - Return true if this range is equal to another range.
///
bool operator==(const ConstantRange &CR) const {
/// subtract - Subtract the specified constant from the endpoints of this
/// constant range.
- ConstantRange subtract(ConstantInt *CI) const;
+ ConstantRange subtract(const APInt &CI) const;
/// intersectWith - Return the range that results from the intersection of
/// this range with another range. The resultant range is pruned as much as
/// one of the sets but not the other. For example: [100, 8) intersect [3,
/// 120) yields [3, 120)
///
- ConstantRange intersectWith(const ConstantRange &CR, bool isSigned) const;
+ ConstantRange intersectWith(const ConstantRange &CR) const;
+
+ /// maximalIntersectWith - Return the range that results from the intersection
+ /// of this range with another range. The resultant range is guaranteed to
+ /// include all elements contained in both input ranges, and to have the
+ /// smallest possible set size that does so. Because there may be two
+ /// intersections with the same set size, A.maximalIntersectWith(B) might not
+ /// be equal to B.maximalIntersectWith(A).
+ ///
+ ConstantRange maximalIntersectWith(const ConstantRange &CR) const;
/// unionWith - Return the range that results from the union of this range
/// with another range. The resultant range is guaranteed to include the
/// [12,15) is [3, 15), which includes 9, 10, and 11, which were not included
/// in either set before.
///
- ConstantRange unionWith(const ConstantRange &CR, bool isSigned) const;
+ ConstantRange unionWith(const ConstantRange &CR) const;
/// zeroExtend - Return a new range in the specified integer type, which must
/// be strictly larger than the current type. The returned range will
/// correspond to the possible range of values if the source range had been
- /// zero extended.
- ConstantRange zeroExtend(const Type *Ty) const;
+ /// zero extended to BitWidth.
+ ConstantRange zeroExtend(uint32_t BitWidth) const;
+
+ /// signExtend - Return a new range in the specified integer type, which must
+ /// be strictly larger than the current type. The returned range will
+ /// correspond to the possible range of values if the source range had been
+ /// sign extended to BitWidth.
+ ConstantRange signExtend(uint32_t BitWidth) const;
/// truncate - Return a new range in the specified integer type, which must be
/// strictly smaller than the current type. The returned range will
/// correspond to the possible range of values if the source range had been
/// truncated to the specified type.
- ConstantRange truncate(const Type *Ty) const;
+ ConstantRange truncate(uint32_t BitWidth) const;
/// print - Print out the bounds to a stream...
///