ARM: make sure that the expected code size is computed in predictable scope.

src/assembler.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 140 matching lines @@
 
 
 AssemblerBase::~AssemblerBase() {
   if (own_buffer_) DeleteArray(buffer_);
 }
 
 
 // -----------------------------------------------------------------------------
 // Implementation of PredictableCodeSizeScope
 
+PredictableCodeSizeScope::PredictableCodeSizeScope(AssemblerBase* assembler)
+    : PredictableCodeSizeScope(assembler, -1) {}
+
+
 PredictableCodeSizeScope::PredictableCodeSizeScope(AssemblerBase* assembler,
                                                    int expected_size)
     : assembler_(assembler),
       expected_size_(expected_size),
       start_offset_(assembler->pc_offset()),
       old_value_(assembler->predictable_code_size()) {
   assembler_->set_predictable_code_size(true);
 }
 
 
@@ skipping 1659 matching lines @@
 
 
 void Assembler::DataAlign(int m) {
   DCHECK(m >= 2 && base::bits::IsPowerOfTwo32(m));
   while ((pc_offset() & (m - 1)) != 0) {
     db(0);
   }
 }
 }  // namespace internal
 }  // namespace v8