DBC: Remove special case from CheckClassInstr. Cleanup.

runtime/vm/il_printer.cc

 // Copyright (c) 2012, 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.
 
 #include "vm/il_printer.h"
 
 #include "vm/flow_graph_range_analysis.h"
 #include "vm/intermediate_language.h"
 #include "vm/os.h"
 #include "vm/parser.h"
@@ skipping 1257 matching lines @@
   if (outer_ != NULL) outer_->PrintTo(f);
 }
 
 const char* Environment::ToCString() const {
   char buffer[1024];
   BufferFormatter bf(buffer, 1024);
   PrintTo(&bf);
   return Thread::Current()->zone()->MakeCopyOfString(buffer);
 }
 
+
 #else  // PRODUCT
 
+
+const char* Instruction::ToCString() const {
+  return DebugName();
+}
+
+
 void FlowGraphPrinter::PrintOneInstruction(Instruction* instr,
                                            bool print_locations) {
   UNREACHABLE();
 }
 
 
 void FlowGraphPrinter::PrintTypeCheck(const ParsedFunction& parsed_function,
                                       TokenPosition token_pos,
                                       Value* value,
                                       const AbstractType& dst_type,
@@ skipping 20 matching lines @@
 }
 
 
 bool FlowGraphPrinter::ShouldPrint(const Function& function) {
   return false;
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart