--turbo-cache-shared-code shouldn't control lookup in optimized code map.

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/compiler.h"
 
 #include <algorithm>
 #include <memory>
 
 #include "src/asmjs/asm-js.h"
@@ skipping 973 matching lines @@
 MaybeHandle<Code> GetLazyCode(Handle<JSFunction> function) {
   Isolate* isolate = function->GetIsolate();
   DCHECK(!isolate->has_pending_exception());
   DCHECK(!function->is_compiled());
   TimerEventScope<TimerEventCompileCode> compile_timer(isolate);
   RuntimeCallTimerScope runtimeTimer(isolate,
                                      &RuntimeCallStats::CompileCodeLazy);
   TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.CompileCode");
   AggregatedHistogramTimerScope timer(isolate->counters()->compile_lazy());
 
-  if (FLAG_turbo_cache_shared_code) {
-    Handle<Code> cached_code;
-    if (GetCodeFromOptimizedCodeMap(function, BailoutId::None())
-            .ToHandle(&cached_code)) {
-      if (FLAG_trace_opt) {
-        PrintF("[found optimized code for ");
-        function->ShortPrint();
-        PrintF(" during unoptimized compile]\n");
-      }
-      DCHECK(function->shared()->is_compiled());
-      return cached_code;
+  Handle<Code> cached_code;
+  if (GetCodeFromOptimizedCodeMap(function, BailoutId::None())
+          .ToHandle(&cached_code)) {
+    if (FLAG_trace_opt) {
+      PrintF("[found optimized code for ");
+      function->ShortPrint();
+      PrintF(" during unoptimized compile]\n");
     }
+    DCHECK(function->shared()->is_compiled());
+    return cached_code;
   }
 
   if (function->shared()->is_compiled()) {
     return Handle<Code>(function->shared()->code());
   }
 
   if (function->shared()->HasBytecodeArray()) {
     Handle<Code> entry = isolate->builtins()->InterpreterEntryTrampoline();
     function->shared()->ReplaceCode(*entry);
     return entry;
@@ skipping 899 matching lines @@
     DCHECK(shared->is_compiled());
     function->set_literals(cached.literals);
   } else if (shared->is_compiled()) {
     // TODO(mvstanton): pass pretenure flag to EnsureLiterals.
     JSFunction::EnsureLiterals(function);
   }
 }
 
 }  // namespace internal
 }  // namespace v8