Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/IR/User.h b/linux-x64/clang/include/llvm/IR/User.h
index 9d30be0..aea3146 100644
--- a/linux-x64/clang/include/llvm/IR/User.h
+++ b/linux-x64/clang/include/llvm/IR/User.h
@@ -36,7 +36,7 @@
 template <typename T> class ArrayRef;
 template <typename T> class MutableArrayRef;
 
-/// \brief Compile-time customization of User operands.
+/// Compile-time customization of User operands.
 ///
 /// Customizes operand-related allocators and accessors.
 template <class>
@@ -81,13 +81,13 @@
            "Error in initializing hung off uses for User");
   }
 
-  /// \brief Allocate the array of Uses, followed by a pointer
+  /// Allocate the array of Uses, followed by a pointer
   /// (with bottom bit set) to the User.
   /// \param IsPhi identifies callers which are phi nodes and which need
   /// N BasicBlock* allocated along with N
   void allocHungoffUses(unsigned N, bool IsPhi = false);
 
-  /// \brief Grow the number of hung off uses.  Note that allocHungoffUses
+  /// Grow the number of hung off uses.  Note that allocHungoffUses
   /// should be called if there are no uses.
   void growHungoffUses(unsigned N, bool IsPhi = false);
 
@@ -97,26 +97,26 @@
 public:
   User(const User &) = delete;
 
-  /// \brief Free memory allocated for User and Use objects.
+  /// Free memory allocated for User and Use objects.
   void operator delete(void *Usr);
-  /// \brief Placement delete - required by std, called if the ctor throws.
+  /// Placement delete - required by std, called if the ctor throws.
   void operator delete(void *Usr, unsigned) {
-    // Note: If a subclass manipulates the information which is required to calculate the 
-    // Usr memory pointer, e.g. NumUserOperands, the operator delete of that subclass has 
+    // Note: If a subclass manipulates the information which is required to calculate the
+    // Usr memory pointer, e.g. NumUserOperands, the operator delete of that subclass has
     // to restore the changed information to the original value, since the dtor of that class
-    // is not called if the ctor fails.  
+    // is not called if the ctor fails.
     User::operator delete(Usr);
 
 #ifndef LLVM_ENABLE_EXCEPTIONS
     llvm_unreachable("Constructor throws?");
 #endif
   }
-  /// \brief Placement delete - required by std, called if the ctor throws.
+  /// Placement delete - required by std, called if the ctor throws.
   void operator delete(void *Usr, unsigned, bool) {
-    // Note: If a subclass manipulates the information which is required to calculate the 
-    // Usr memory pointer, e.g. NumUserOperands, the operator delete of that subclass has 
+    // Note: If a subclass manipulates the information which is required to calculate the
+    // Usr memory pointer, e.g. NumUserOperands, the operator delete of that subclass has
     // to restore the changed information to the original value, since the dtor of that class
-    // is not called if the ctor fails.  
+    // is not called if the ctor fails.
     User::operator delete(Usr);
 
 #ifndef LLVM_ENABLE_EXCEPTIONS
@@ -210,7 +210,7 @@
     NumUserOperands = NumOps;
   }
 
-  /// \brief Subclasses with hung off uses need to manage the operand count
+  /// Subclasses with hung off uses need to manage the operand count
   /// themselves.  In these instances, the operand count isn't used to find the
   /// OperandList, so there's no issue in having the operand count change.
   void setNumHungOffUseOperands(unsigned NumOps) {
@@ -242,7 +242,7 @@
     return const_op_range(op_begin(), op_end());
   }
 
-  /// \brief Iterator for directly iterating over the operand Values.
+  /// Iterator for directly iterating over the operand Values.
   struct value_op_iterator
       : iterator_adaptor_base<value_op_iterator, op_iterator,
                               std::random_access_iterator_tag, Value *,
@@ -284,7 +284,7 @@
     return make_range(value_op_begin(), value_op_end());
   }
 
-  /// \brief Drop all references to operands.
+  /// Drop all references to operands.
   ///
   /// This function is in charge of "letting go" of all objects that this User
   /// refers to.  This allows one to 'delete' a whole class at a time, even
@@ -297,7 +297,7 @@
       U.set(nullptr);
   }
 
-  /// \brief Replace uses of one Value with another.
+  /// Replace uses of one Value with another.
   ///
   /// Replaces all references to the "From" definition with references to the
   /// "To" definition.