System: Add SwapByteOrder and update Support/MathExtras.h to use it.

[oota-llvm.git] / include / llvm / AbstractTypeUser.h

diff --git a/include/llvm/AbstractTypeUser.h b/include/llvm/AbstractTypeUser.h
index 80656d89b726a20f3d5b954dc50eaa4dd3a35fe1..81f5c5c7680d87ef4b6f8b0fe76cc3963923287d 100644 (file)
--- a/include/llvm/AbstractTypeUser.h
+++ b/include/llvm/AbstractTypeUser.h
@@ -31,6 +31,7 @@
 
 namespace llvm {
 
+class Value;
 class Type;
 class DerivedType;
 template<typename T> struct simplify_type;
@@ -55,6 +56,12 @@ template<typename T> struct simplify_type;
 class AbstractTypeUser {
 protected:
   virtual ~AbstractTypeUser();                        // Derive from me
+
+  /// setType - It's normally not possible to change a Value's type in place,
+  /// but an AbstractTypeUser subclass that knows what its doing can be
+  /// permitted to do so with care.
+  void setType(Value *V, const Type *NewTy);
+
 public:
 
   /// refineAbstractType - The callback method invoked when an abstract type is
@@ -65,7 +72,7 @@ public:
                                   const Type *NewTy) = 0;
 
   /// The other case which AbstractTypeUsers must be aware of is when a type
-  /// makes the transition from being abstract (where it has clients on it's
+  /// makes the transition from being abstract (where it has clients on its
   /// AbstractTypeUsers list) to concrete (where it does not).  This method
   /// notifies ATU's when this occurs for a type.
   ///
@@ -137,7 +144,9 @@ public:
 ///
 class PATypeHolder {
   mutable const Type *Ty;
+  void destroy();
 public:
+  PATypeHolder() : Ty(0) {}
   PATypeHolder(const Type *ty) : Ty(ty) {
     addRef();
   }
@@ -173,6 +182,7 @@ public:
 private:
   void addRef();
   void dropRef();
+  friend class TypeMapBase;
 };
 
 // simplify_type - Allow clients to treat uses just like values when using