Subzero: Make Ice::Ostream a typedef for llvm::raw_ostream.

src/IceTargetLoweringX8632.cpp

 //===- subzero/src/IceTargetLoweringX8632.cpp - x86-32 lowering -----------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the TargetLoweringX8632 class, which
@@ skipping 110 matching lines @@
 // The maximum number of arguments to pass in XMM registers
 const unsigned X86_MAX_XMM_ARGS = 4;
 // The number of bits in a byte
 const unsigned X86_CHAR_BIT = 8;
 
 // Return a string representation of the type that is suitable for use
 // in an identifier.
 IceString typeIdentString(const Type Ty) {
   IceString Str;
   llvm::raw_string_ostream BaseOS(Str);
-  Ostream OS(&BaseOS);
   if (isVectorType(Ty)) {
-    OS << "v" << typeNumElements(Ty) << typeElementType(Ty);
+    BaseOS << "v" << typeNumElements(Ty) << typeElementType(Ty);
   } else {
-    OS << Ty;
+    BaseOS << Ty;
   }
   return BaseOS.str();
 }
 
 // In some cases, there are x-macros tables for both high-level and
 // low-level instructions/operands that use the same enum key value.
 // The tables are kept separate to maintain a proper separation
 // between abstraction layers.  There is a risk that the tables
 // could get out of sync if enum values are reordered or if entries
 // are added or deleted.  This dummy function uses static_assert to
@@ skipping 3864 matching lines @@
     for (SizeT i = 0; i < Size; ++i) {
       Str << "\t.byte\t" << (((unsigned)Data[i]) & 0xff) << "\n";
     }
     Str << "\t.size\t" << MangledName << ", " << Size << "\n";
   }
   Str << "\t" << (IsInternal ? ".local" : ".global") << "\t" << MangledName
       << "\n";
 }
 
 } // end of namespace Ice