Fix ARM build.

src/jsregexp.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2551 matching lines @@
   }
   ASSERT(variant->stop_node() == NULL);
   if (!variant->is_trivial()) {
     return variant->Flush(compiler, this);
   }
   return ChoiceNode::Emit(compiler, variant);
 }
 
 
 int ChoiceNode::CalculatePreloadCharacters(RegExpCompiler* compiler) {
-  bool ascii = compiler->ascii();
   int preload_characters = EatsAtLeast(0);
 #ifdef CAN_READ_UNALIGNED
+  bool ascii = compiler->ascii();
   if (ascii) {
     if (preload_characters > 4) preload_characters = 4;
     // We can't preload 3 characters because there is no machine instruction
     // to do that.  We can't just load 4 because we could be reading
     // beyond the end of the string, which could cause a memory fault.
     if (preload_characters == 3) preload_characters = 2;
   } else {
     if (preload_characters > 2) preload_characters = 2;
   }
 #else
@@ skipping 1710 matching lines @@
   EmbeddedVector<byte, 1024> codes;
   RegExpMacroAssemblerIrregexp macro_assembler(codes);
   return compiler.Assemble(&macro_assembler,
                            node,
                            data->capture_count,
                            pattern);
 }
 
 
 }}  // namespace v8::internal