Minimize differences between ia32 and x64 sources to facilitate maintenance.

runtime/vm/code_generator_ia32.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/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/code_generator.h"
 
 #include "lib/error.h"
 #include "vm/assembler_macros.h"
 #include "vm/ast_printer.h"
 #include "vm/class_finalizer.h"
 #include "vm/code_descriptors.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
 #include "vm/intrinsifier.h"
 #include "vm/longjump.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/parser.h"
 #include "vm/resolver.h"
 #include "vm/stub_code.h"
 
 namespace dart {
 
 DECLARE_FLAG(bool, print_ast);
-DEFINE_FLAG(bool, print_scopes, false, "Print scopes of local variables.");
-DEFINE_FLAG(bool, trace_functions, false, "Trace entry of each function.");
+DECLARE_FLAG(bool, print_scopes);
+DECLARE_FLAG(bool, trace_functions);
 DEFINE_FLAG(bool, print_ic_in_optimized, false,
     "Debugging helper to identify potential performance pitfalls.");
 DECLARE_FLAG(int, optimization_counter_threshold);
 DECLARE_FLAG(bool, enable_type_checks);
 DECLARE_FLAG(bool, trace_compiler);
 DECLARE_FLAG(bool, intrinsify);
 DECLARE_FLAG(bool, trace_functions);
 
 
 #define __ assembler_->
@@ skipping 2930 matching lines @@
   const Error& error = Error::Handle(
       Parser::FormatError(script, token_pos, "Error", format, args));
   va_end(args);
   Isolate::Current()->long_jump_base()->Jump(1, error);
   UNREACHABLE();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32