X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FSupport%2FConstantRange.h;h=2e477cf899842677cacc417a4fbb1a4a2681c471;hb=fc82fabe00b0b820e3c0d7fc9e289bace0295f11;hp=ae36f42e12c9d32027ba40e7c7b725d0f6f75aa5;hpb=581b0d453a63f7f657248f80317976995262be11;p=oota-llvm.git

diff --git a/include/llvm/Support/ConstantRange.h b/include/llvm/Support/ConstantRange.h
index ae36f42e12c..2e477cf8998 100644
--- a/include/llvm/Support/ConstantRange.h
+++ b/include/llvm/Support/ConstantRange.h
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -36,17 +36,15 @@
 #include <iosfwd>
 
 namespace llvm {
-class Constant;
-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);
+  explicit ConstantRange(uint32_t BitWidth, bool isFullSet = true);
 
   /// Initialize a range to hold the single specified value.
   ///
@@ -57,12 +55,6 @@ class ConstantRange {
   /// 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, const APInt &C);
-
   /// getLower - Return the lower value for this range...
   ///
   const APInt &getLower() const { return Lower; }
@@ -71,9 +63,9 @@ class ConstantRange {
   ///
   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
@@ -87,13 +79,11 @@ class ConstantRange {
   /// 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(const APInt &Val, bool isSigned) const;
+  bool contains(const APInt &Val) const;
 
   /// getSingleElement - If this set contains a single element, return it,
   /// otherwise return null.
@@ -112,6 +102,26 @@ class ConstantRange {
   ///
   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 {
@@ -131,7 +141,16 @@ class ConstantRange {
   /// 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
@@ -139,19 +158,25 @@ class ConstantRange {
   /// [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...
   ///