add a friend needed by a stringmap change.

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

diff --git a/include/llvm/Constant.h b/include/llvm/Constant.h
index c45ec2e77ed30901a57db3840fb285905cf6ae17..b0a130f81e4773e8aa80f6dd53a783c95c802860 100644 (file)
--- a/include/llvm/Constant.h
+++ b/include/llvm/Constant.h
@@ -17,6 +17,7 @@
 #include "llvm/User.h"
 
 namespace llvm {
+  template<typename T> class SmallVectorImpl;
 
 /// This is an important base class in LLVM. It provides the common facilities
 /// of all constant values in an LLVM program. A constant is a value that is
@@ -32,7 +33,7 @@ namespace llvm {
 /// Note that Constants are immutable (once created they never change) 
 /// and are fully shared by structural equivalence.  This means that two 
 /// structurally equivalent constants will always have the same address.  
-/// Constant's are created on demand as needed and never deleted: thus clients 
+/// Constants are created on demand as needed and never deleted: thus clients 
 /// don't have to worry about the lifetime of the objects.
 /// @brief LLVM Constant Representation
 class Constant : public User {
@@ -57,9 +58,6 @@ public:
   /// getNullValue.
   virtual bool isNullValue() const = 0;
 
-  virtual void print(std::ostream &O) const;
-  void print(std::ostream *O) const { if (O) print(*O); }
-  
   /// 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;
@@ -68,7 +66,7 @@ public:
   /// relocations which cannot be resolved at compile time.
   bool ContainsRelocations() const;
 
-  // Specialize get/setOperand for Constant's as their operands are always
+  // Specialize get/setOperand for Constants as their operands are always
   // constants as well.
   Constant *getOperand(unsigned i) {
     return static_cast<Constant*>(User::getOperand(i));
@@ -79,6 +77,12 @@ public:
   void setOperand(unsigned i, Constant *C) {
     User::setOperand(i, C);
   }
+  
+  /// getVectorElements - This method, which is only valid on constant of vector
+  /// type, returns the elements of the vector in the specified smallvector.
+  /// This handles breaking down a vector undef into undef elements, etc.  For
+  /// constant exprs and other cases we can't handle, we return an empty vector.
+  void getVectorElements(SmallVectorImpl<Constant*> &Elts) const;
 
   /// destroyConstant - Called if some element of this constant is no longer
   /// valid.  At this point only other constants may be on the use_list for this