namespace llvm {
-class APFloat;
-class APInt;
-class ArrayType;
-class Constant;
-class ConstantAggregateZero;
-class ConstantArray;
-class ConstantFP;
-class ConstantInt;
-class ConstantPointerNull;
-class ConstantStruct;
-class ConstantVector;
-class FunctionType;
-class IntegerType;
struct LLVMContextImpl;
-class MDNode;
-class MDString;
-class OpaqueType;
-class PointerType;
-class StringRef;
-class StructType;
-class Type;
-class UndefValue;
-class Use;
-class Value;
-class VectorType;
/// This is an important class for using LLVM in a threaded context. It
/// (opaquely) owns and manages the core "global" data of LLVM's core
namespace llvm {
+class StringRef;
+
/// This class provides a symbol table of name/type pairs with operations to
/// support constructing, searching and iterating over the symbol table. The
/// class derives from AbstractTypeUser so that the contents of the symbol