Turn on DCHECKs and other debugging code if dcheck_always_on is 1

src/jsregexp.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/ast.h"
 #include "src/base/platform/platform.h"
 #include "src/compilation-cache.h"
 #include "src/compiler.h"
@@ skipping 1086 matching lines @@
   macro_assembler_->Bind(&fail);
   macro_assembler_->Fail();
   while (!work_list.is_empty()) {
     work_list.RemoveLast()->Emit(this, &new_trace);
   }
   if (reg_exp_too_big_) return IrregexpRegExpTooBig(zone_->isolate());
 
   Handle<HeapObject> code = macro_assembler_->GetCode(pattern);
   heap->IncreaseTotalRegexpCodeGenerated(code->Size());
   work_list_ = NULL;
-#ifdef DEBUG
+#ifdef ENABLE_DISASSEMBLER
   if (FLAG_print_code) {
     CodeTracer::Scope trace_scope(heap->isolate()->GetCodeTracer());
     OFStream os(trace_scope.file());
     Handle<Code>::cast(code)->Disassemble(pattern->ToCString().get(), os);
   }
+#endif
+#ifdef DEBUG
   if (FLAG_trace_regexp_assembler) {
     delete macro_assembler_;
   }
 #endif
   return RegExpEngine::CompilationResult(*code, next_register_);
 }
 
 
 bool Trace::DeferredAction::Mentions(int that) {
   if (action_type() == ActionNode::CLEAR_CAPTURES) {
@@ skipping 5014 matching lines @@
   }
 
   return compiler.Assemble(&macro_assembler,
                            node,
                            data->capture_count,
                            pattern);
 }
 
 
 }}  // namespace v8::internal