llvm-mc: Add MCExpr::{dump,print}.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80570 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/MC/MCExpr.h

@@ -17,6 +17,7 @@ namespace llvm {
 class MCContext;
 class MCSymbol;
 class MCValue;
+class raw_ostream;
 
 /// MCExpr - Base class for the full range of assembler expressions which are
 /// needed for parsing.
@@ -44,6 +45,13 @@ public:
 
   ExprKind getKind() const { return Kind; }
 
+  /// @}
+  /// @name Utility Methods
+  /// @{
+
+  void print(raw_ostream &OS) const;
+  void dump() const;
+
   /// @}
   /// @name Expression Evaluation
   /// @{