X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FConstants.h;h=a75aaf72a309c4889cf93cb071ac026ccf3def54;hb=7293ac12811c8a43023830380e70c0fda941f8ec;hp=ba0ace3f7a1bd1b163dc09b50bc489d1733fac8b;hpb=dbc56bbf755ea553e33a79ac51e0ed5dda6eb59a;p=oota-llvm.git

diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h
index ba0ace3f7a1..a75aaf72a30 100644
--- a/include/llvm/Constants.h
+++ b/include/llvm/Constants.h
@@ -25,7 +25,6 @@
 #include "llvm/OperandTraits.h"
 #include "llvm/ADT/APInt.h"
 #include "llvm/ADT/APFloat.h"
-#include "llvm/ADT/SmallVector.h"
 #include <vector>
 
 namespace llvm {
@@ -33,7 +32,6 @@ namespace llvm {
 class ArrayType;
 class IntegerType;
 class StructType;
-class UnionType;
 class PointerType;
 class VectorType;
 
@@ -41,6 +39,8 @@ template<class ConstantClass, class TypeClass, class ValType>
 struct ConstantCreator;
 template<class ConstantClass, class TypeClass>
 struct ConvertConstantType;
+template<typename T, unsigned N>
+class SmallVector;
 
 //===----------------------------------------------------------------------===//
 /// This is the shared class of boolean and integer constants. This class 
@@ -459,49 +459,6 @@ struct OperandTraits<ConstantStruct> : public VariadicOperandTraits<> {
 
 DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantStruct, Constant)
 
-//===----------------------------------------------------------------------===//
-// ConstantUnion - Constant Union Declarations
-//
-class ConstantUnion : public Constant {
-  friend struct ConstantCreator<ConstantUnion, UnionType, Constant*>;
-  ConstantUnion(const ConstantUnion &);      // DO NOT IMPLEMENT
-protected:
-  ConstantUnion(const UnionType *T, Constant* Val);
-public:
-  // ConstantUnion accessors
-  static Constant *get(const UnionType *T, Constant* V);
-
-  /// Transparently provide more efficient getOperand methods.
-  DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
-  
-  /// getType() specialization - Reduce amount of casting...
-  ///
-  inline const UnionType *getType() const {
-    return reinterpret_cast<const UnionType*>(Value::getType());
-  }
-
-  /// isNullValue - Return true if this is the value that would be returned by
-  /// getNullValue.  This always returns false because zero structs are always
-  /// created as ConstantAggregateZero objects.
-  virtual bool isNullValue() const {
-    return false;
-  }
-
-  virtual void destroyConstant();
-  virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U);
-
-  /// Methods for support type inquiry through isa, cast, and dyn_cast:
-  static inline bool classof(const ConstantUnion *) { return true; }
-  static bool classof(const Value *V) {
-    return V->getValueID() == ConstantUnionVal;
-  }
-};
-
-template <>
-struct OperandTraits<ConstantUnion> : public FixedNumOperandTraits<1> {
-};
-
-DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantUnion, Constant)
 
 //===----------------------------------------------------------------------===//
 /// ConstantVector - Constant Vector Declarations
@@ -923,7 +880,11 @@ DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantExpr, Constant)
 /// UndefValue - 'undef' values are things that do not have specified contents.
 /// These are used for a variety of purposes, including global variable
 /// initializers and operands to instructions.  'undef' values can occur with
-/// any type.
+/// any first-class type.
+///
+/// Undef values aren't exactly constants; if they have multiple uses, they
+/// can appear to have different bit patterns at each use. See
+/// LangRef.html#undefvalues for details.
 ///
 class UndefValue : public Constant {
   friend struct ConstantCreator<UndefValue, Type, char>;
@@ -954,6 +915,7 @@ public:
     return V->getValueID() == UndefValueVal;
   }
 };
+
 } // End llvm namespace
 
 #endif