Refactor use of Isolate::use_crankshaft.

src/compiler.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/compiler.h"
 
 #include "src/ast-numbering.h"
 #include "src/bootstrapper.h"
@@ skipping 1364 matching lines @@
   Handle<Code> cached_code;
   if (GetCodeFromOptimizedCodeMap(
           function, osr_ast_id).ToHandle(&cached_code)) {
     return cached_code;
   }
 
   SmartPointer<CompilationInfo> info(new CompilationInfoWithZone(function));
   Isolate* isolate = info->isolate();
   DCHECK(AllowCompilation::IsAllowed(isolate));
   VMState<COMPILER> state(isolate);
+  DCHECK(isolate->use_crankshaft());
   DCHECK(!isolate->has_pending_exception());
   PostponeInterruptsScope postpone(isolate);
 
   Handle<SharedFunctionInfo> shared = info->shared_info();
   shared->set_optimize_next_closure(false);
   if (shared->code()->kind() != Code::FUNCTION ||
       ScopeInfo::Empty(isolate) == shared->scope_info()) {
     // The function was never compiled. Compile it unoptimized first.
     // TODO(titzer): reuse the AST and scope info from this compile.
     CompilationInfoWithZone nested(function);
@@ skipping 104 matching lines @@
   AllowHandleDereference allow_deref;
   bool tracing_on = info()->IsStub()
       ? FLAG_trace_hydrogen_stubs
       : (FLAG_trace_hydrogen &&
          info()->closure()->PassesFilter(FLAG_trace_hydrogen_filter));
   return (tracing_on &&
       base::OS::StrChr(const_cast<char*>(FLAG_trace_phase), name_[0]) != NULL);
 }
 
 } }  // namespace v8::internal