[turbofan] Use the SharedInfo only if we have it in the code generator.

src/compiler/code-generator.cc

 // Copyright 2013 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/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/pipeline.h"
 #include "src/frames-inl.h"
@@ skipping 341 matching lines @@
   Handle<DeoptimizationInputData> data =
       DeoptimizationInputData::New(isolate(), deopt_count, TENURED);
 
   Handle<ByteArray> translation_array =
       translations_.CreateByteArray(isolate()->factory());
 
   data->SetTranslationByteArray(*translation_array);
   data->SetInlinedFunctionCount(
       Smi::FromInt(static_cast<int>(inlined_function_count_)));
   data->SetOptimizationId(Smi::FromInt(info->optimization_id()));
-  // TODO(jarin) The following code was copied over from Lithium, not sure
-  // whether the scope or the IsOptimizing condition are really needed.
-  if (info->IsOptimizing()) {
-    // Reference to shared function info does not change between phases.
-    AllowDeferredHandleDereference allow_handle_dereference;
+
+  if (info->has_shared_info()) {
     data->SetSharedFunctionInfo(*info->shared_info());
   } else {
     data->SetSharedFunctionInfo(Smi::FromInt(0));
   }
 
   Handle<FixedArray> literals = isolate()->factory()->NewFixedArray(
       static_cast<int>(deoptimization_literals_.size()), TENURED);
   {
     AllowDeferredHandleDereference copy_handles;
     for (unsigned i = 0; i < deoptimization_literals_.size(); i++) {
@@ skipping 291 matching lines @@
     : masm_(gen->masm()), next_(gen->ools_) {
   gen->ools_ = this;
 }
 
 
 OutOfLineCode::~OutOfLineCode() {}
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8