3 files changed, 12 insertions, 2 deletions
diff --git a/include/llvm/Constant.h b/include/llvm/Constant.h
index bccd417..3dc5881 100644
--- a/include/llvm/Constant.h
+++ b/include/llvm/Constant.h
@@ -64,6 +64,10 @@ public:
   /// getNullValue.
   virtual bool isNullValue() const = 0;
 
+  /// isNegativeZeroValue - Return true if the value is what would be returned 
+  /// by getZeroValueForNegation.
+  virtual bool isNegativeZeroValue() const { return isNullValue(); }
+
   /// canTrap - Return true if evaluation of this constant could trap.  This is
   /// true for things like constant expressions that could divide by zero.
   bool canTrap() const;
diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h
index b727de3..143f3ad 100644
--- a/include/llvm/Constants.h
+++ b/include/llvm/Constants.h
@@ -270,6 +270,12 @@ public:
   /// getNullValue.  Don't depend on == for doubles to tell us it's zero, it
   /// considers -0.0 to be null as well as 0.0.  :(
   virtual bool isNullValue() const;
+  
+  /// isNegativeZeroValue - Return true if the value is what would be returned 
+  /// by getZeroValueForNegation.
+  virtual bool isNegativeZeroValue() const {
+    return Val.isZero() && Val.isNegative();
+  }
 
   /// isExactlyValue - We don't rely on operator== working on double values, as
   /// it returns true for things that are clearly not equal, like -0.0 and 0.0.
diff --git a/include/llvm/InstrTypes.h b/include/llvm/InstrTypes.h
index eb0b7b6..1ee2a4b 100644
--- a/include/llvm/InstrTypes.h
+++ b/include/llvm/InstrTypes.h
@@ -224,8 +224,8 @@ public:
   /// isNeg, isFNeg, isNot - Check if the given Value is a
   /// NEG, FNeg, or NOT instruction.
   ///
-  static bool isNeg(LLVMContext &Context, const Value *V);
-  static bool isFNeg(LLVMContext &Context, const Value *V);
+  static bool isNeg(const Value *V);
+  static bool isFNeg(const Value *V);
   static bool isNot(const Value *V);
 
   /// getNegArgument, getNotArgument - Helper functions to extract the