Clarify which type "Label" refers to (generic vs X86)

src/IceAssemblerX86BaseImpl.h

 //===- subzero/src/IceAssemblerX86BaseImpl.h - base x86 assembler -*- C++ -*-=//
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // Modified by the Subzero authors.
 //
 //===----------------------------------------------------------------------===//
 //
 //                        The Subzero Code Generator
@@ skipping 52 matching lines @@
   }
   L = Labels[Number];
   if (!L) {
     L = new (this->allocate<Label>()) Label();
     Labels[Number] = L;
   }
   return L;
 }
 
 template <class Machine>
+Ice::Label *AssemblerX86Base<Machine>::getCfgNodeLabel(SizeT NodeNumber) {
+  assert(NodeNumber < CfgNodeLabels.size());
+  return CfgNodeLabels[NodeNumber];
+}
+
+template <class Machine>
 Label *AssemblerX86Base<Machine>::getOrCreateCfgNodeLabel(SizeT NodeNumber) {
   return getOrCreateLabel(NodeNumber, CfgNodeLabels);
 }
 
 template <class Machine>
 Label *AssemblerX86Base<Machine>::getOrCreateLocalLabel(SizeT Number) {
   return getOrCreateLabel(Number, LocalLabels);
 }
 
 template <class Machine>
@@ skipping 3193 matching lines @@
   (void)shifter;
   if (Ty == IceType_i16)
     emitOperandSizeOverride();
   emitRexB(Ty, operand.rm());
   emitUint8(isByteSizedArithType(Ty) ? 0xD2 : 0xD3);
   emitOperand(rm, operand);
 }
 
 } // end of namespace X86Internal
 } // end of namespace Ice