[turbofan] Use inline allocation for closures.

test/unittests/compiler/js-create-lowering-unittest.cc

 // Copyright 2016 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/js-create-lowering.h"
 #include "src/code-factory.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 154 matching lines @@
   Reduction r = Reduce(graph()->NewNode(
       javascript()->CreateArguments(CreateArgumentsType::kRestParameter),
       closure, context, frame_state_inner, effect, control));
   ASSERT_TRUE(r.Changed());
   EXPECT_THAT(r.replacement(),
               IsFinishRegion(
                   IsAllocate(IsNumberConstant(JSArray::kSize), _, control), _));
 }
 
 // -----------------------------------------------------------------------------
+// JSCreateClosure
+
+TEST_F(JSCreateLoweringTest, JSCreateClosureViaInlinedAllocation) {
+  Node* const context = UndefinedConstant();
+  Node* const effect = graph()->start();
+  Node* const control = graph()->start();
+  Handle<SharedFunctionInfo> shared(isolate()->object_function()->shared());
+  Reduction r =
+      Reduce(graph()->NewNode(javascript()->CreateClosure(shared, NOT_TENURED),
+                              context, effect, control));
+  ASSERT_TRUE(r.Changed());
+  EXPECT_THAT(r.replacement(),
+              IsFinishRegion(IsAllocate(IsNumberConstant(JSFunction::kSize),
+                                        IsBeginRegion(_), control),
+                             _));
+}
+
+// -----------------------------------------------------------------------------
 // JSCreateFunctionContext
 
 TEST_F(JSCreateLoweringTest, JSCreateFunctionContextViaInlinedAllocation) {
   Node* const closure = Parameter(Type::Any());
   Node* const context = Parameter(Type::Any());
   Node* const effect = graph()->start();
   Node* const control = graph()->start();
   Reduction const r =
       Reduce(graph()->NewNode(javascript()->CreateFunctionContext(8), closure,
                               context, effect, control));
@@ skipping 42 matching lines @@
   EXPECT_THAT(r.replacement(),
               IsFinishRegion(IsAllocate(IsNumberConstant(Context::SizeFor(
                                             Context::MIN_CONTEXT_SLOTS + 1)),
                                         IsBeginRegion(_), control),
                              _));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8