Add switch instruction to Subzero bitcode reader.

src/IceTypes.h

 //===- subzero/src/IceTypes.h - Primitive ICE types -------------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares a few properties of the primitive types allowed
@@ skipping 48 matching lines @@
 bool isVectorFloatingType(Type Ty);
 
 /// Returns true if the given type can be used in a load instruction.
 bool isLoadStoreType(Type Ty);
 
 /// Returns type generated by applying the compare instructions (icmp and fcmp)
 /// to arguments of the given type. Returns IceType_void if compare is not
 /// allowed.
 Type getCompareResultType(Type Ty);
 
+/// Returns the number of bits in a scalar integer type.
+SizeT getScalarIntBitWidth(Type Ty);
+
 template <typename StreamType>
 inline StreamType &operator<<(StreamType &Str, const Type &Ty) {
   Str << typeString(Ty);
   return Str;
 }
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETYPES_H