Add a check for posix_spawn.

[oota-llvm.git] / include / llvm / Support / ConstantRange.h

diff --git a/include/llvm/Support/ConstantRange.h b/include/llvm/Support/ConstantRange.h
index 64019ca3a7bc92bff431a6ef8b0fb0ea96d717e9..6342c6f1bdde8c4d0df97645ad6d0e4a0c06d640 100644 (file)
--- a/include/llvm/Support/ConstantRange.h
+++ b/include/llvm/Support/ConstantRange.h
@@ -33,7 +33,7 @@
 #define LLVM_SUPPORT_CONSTANT_RANGE_H
 
 #include "llvm/ADT/APInt.h"
-#include "llvm/Support/DataTypes.h"
+#include "llvm/System/DataTypes.h"
 
 namespace llvm {
 
@@ -61,6 +61,10 @@ public:
   /// makeICmpRegion - Produce the smallest range that contains all values that
   /// might satisfy the comparison specified by Pred when compared to any value
   /// contained within Other.
+  ///
+  /// Solves for range X in 'for all x in X, there exists a y in Y such that
+  /// icmp op x, y is true'. Every value that might make the comparison true
+  /// is included in the resulting range.
   static ConstantRange makeICmpRegion(unsigned Pred,
                                       const ConstantRange &Other);
 
@@ -149,21 +153,13 @@ public:
   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
-  /// possible, but there may be cases where elements are included that are in
-  /// one of the sets but not the other.  For example: [100, 8) intersect [3,
-  /// 120) yields [3, 120)
-  ///
-  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
+  /// 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).
+  /// intersections with the same set size, A.intersectWith(B) might not
+  /// be equal to B.intersectWith(A).
   ///
-  ConstantRange maximalIntersectWith(const ConstantRange &CR) const;
+  ConstantRange intersectWith(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
@@ -191,6 +187,14 @@ public:
   /// truncated to the specified type.
   ConstantRange truncate(uint32_t BitWidth) const;
 
+  /// zextOrTrunc - make this range have the bit width given by \p BitWidth. The
+  /// value is zero extended, truncated, or left alone to make it that width.
+  ConstantRange zextOrTrunc(uint32_t BitWidth) const;
+  
+  /// sextOrTrunc - make this range have the bit width given by \p BitWidth. The
+  /// value is sign extended, truncated, or left alone to make it that width.
+  ConstantRange sextOrTrunc(uint32_t BitWidth) const;
+
   /// add - Return a new range representing the possible values resulting
   /// from an addition of a value in this range and a value in Other.
   ConstantRange add(const ConstantRange &Other) const;
@@ -213,6 +217,18 @@ public:
   /// TODO: This isn't fully implemented yet.
   ConstantRange udiv(const ConstantRange &Other) const;
 
+  /// shl - Return a new range representing the possible values resulting
+  /// from a left shift of a value in this range by the Amount value.
+  ConstantRange shl(const ConstantRange &Amount) const;
+
+  /// ashr - Return a new range representing the possible values resulting from
+  /// an arithmetic right shift of a value in this range by the Amount value.
+  ConstantRange ashr(const ConstantRange &Amount) const;
+
+  /// shr - Return a new range representing the possible values resulting
+  /// from a logical right shift of a value in this range by the Amount value.
+  ConstantRange lshr(const ConstantRange &Amount) const;
+
   /// print - Print out the bounds to a stream...
   ///
   void print(raw_ostream &OS) const;
@@ -227,8 +243,6 @@ inline raw_ostream &operator<<(raw_ostream &OS, const ConstantRange &CR) {
   return OS;
 }
 
-std::ostream &operator<<(std::ostream &OS, const ConstantRange &CR);
-
 } // End llvm namespace
 
 #endif