[strong] create strong array literals

src/compiler/js-typed-lowering.cc

 // Copyright 2014 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/code-factory.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 936 matching lines @@
 
 
 Reduction JSTypedLowering::ReduceJSCreateLiteralArray(Node* node) {
   DCHECK_EQ(IrOpcode::kJSCreateLiteralArray, node->opcode());
   HeapObjectMatcher<FixedArray> mconst(NodeProperties::GetValueInput(node, 2));
   int length = mconst.Value().handle()->length();
   int flags = OpParameter<int>(node->op());
 
   // Use the FastCloneShallowArrayStub only for shallow boilerplates up to the
   // initial length limit for arrays with "fast" elements kind.
+  // TODO(rossberg): Teach strong mode to FastCloneShallowArrayStub.
   if ((flags & ArrayLiteral::kShallowElements) != 0 &&
+      (flags & ArrayLiteral::kIsStrong) == 0 &&
       length < JSObject::kInitialMaxFastElementArray) {
     Isolate* isolate = jsgraph()->isolate();
     Callable callable = CodeFactory::FastCloneShallowArray(isolate);
     CallDescriptor* desc = Linkage::GetStubCallDescriptor(
         isolate, graph()->zone(), callable.descriptor(), 0,
         (OperatorProperties::GetFrameStateInputCount(node->op()) != 0)
             ? CallDescriptor::kNeedsFrameState
             : CallDescriptor::kNoFlags);
     const Operator* new_op = common()->Call(desc);
     Node* stub_code = jsgraph()->HeapConstant(callable.code());
@@ skipping 235 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSTypedLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8