Compile FastCloneShallowArrayStub using Crankshaft.

src/x64/full-codegen-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1677 matching lines @@
   int length = subexprs->length();
   Handle<FixedArray> constant_elements = expr->constant_elements();
   ASSERT_EQ(2, constant_elements->length());
   ElementsKind constant_elements_kind =
       static_cast<ElementsKind>(Smi::cast(constant_elements->get(0))->value());
   bool has_constant_fast_elements =
       IsFastObjectElementsKind(constant_elements_kind);
   Handle<FixedArrayBase> constant_elements_values(
       FixedArrayBase::cast(constant_elements->get(1)));
 
-  __ movq(rbx, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
-  __ push(FieldOperand(rbx, JSFunction::kLiteralsOffset));
-  __ Push(Smi::FromInt(expr->literal_index()));
-  __ Push(constant_elements);
   Heap* heap = isolate()->heap();
   if (has_constant_fast_elements &&
       constant_elements_values->map() == heap->fixed_cow_array_map()) {
     // If the elements are already FAST_*_ELEMENTS, the boilerplate cannot
     // change, so it's possible to specialize the stub in advance.
     __ IncrementCounter(isolate()->counters()->cow_arrays_created_stub(), 1);
+    __ movq(rbx, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
+    __ movq(rax, FieldOperand(rbx, JSFunction::kLiteralsOffset));
+    __ Move(rbx, Smi::FromInt(expr->literal_index()));
+    __ Move(rcx, constant_elements);
     FastCloneShallowArrayStub stub(
         FastCloneShallowArrayStub::COPY_ON_WRITE_ELEMENTS,
         DONT_TRACK_ALLOCATION_SITE,
         length);
     __ CallStub(&stub);
   } else if (expr->depth() > 1) {
+    __ movq(rbx, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
+    __ push(FieldOperand(rbx, JSFunction::kLiteralsOffset));
+    __ Push(Smi::FromInt(expr->literal_index()));
+    __ Push(constant_elements);
     __ CallRuntime(Runtime::kCreateArrayLiteral, 3);
-  } else if (length > FastCloneShallowArrayStub::kMaximumClonedLength) {
+  } else if (Serializer::enabled() ||
+      length > FastCloneShallowArrayStub::kMaximumClonedLength) {
+    __ movq(rbx, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
+    __ push(FieldOperand(rbx, JSFunction::kLiteralsOffset));
+    __ Push(Smi::FromInt(expr->literal_index()));
+    __ Push(constant_elements);
     __ CallRuntime(Runtime::kCreateArrayLiteralShallow, 3);
   } else {
     ASSERT(IsFastSmiOrObjectElementsKind(constant_elements_kind) ||
            FLAG_smi_only_arrays);
     FastCloneShallowArrayStub::Mode mode =
         FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS;
     AllocationSiteMode allocation_site_mode = FLAG_track_allocation_sites
         ? TRACK_ALLOCATION_SITE : DONT_TRACK_ALLOCATION_SITE;
 
     // If the elements are already FAST_*_ELEMENTS, the boilerplate cannot
     // change, so it's possible to specialize the stub in advance.
     if (has_constant_fast_elements) {
       mode = FastCloneShallowArrayStub::CLONE_ELEMENTS;
       allocation_site_mode = DONT_TRACK_ALLOCATION_SITE;
     }
 
+    __ movq(rbx, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
+    __ movq(rax, FieldOperand(rbx, JSFunction::kLiteralsOffset));
+    __ Move(rbx, Smi::FromInt(expr->literal_index()));
+    __ Move(rcx, constant_elements);
     FastCloneShallowArrayStub stub(mode, allocation_site_mode, length);
     __ CallStub(&stub);
   }
 
   bool result_saved = false;  // Is the result saved to the stack?
 
   // Emit code to evaluate all the non-constant subexpressions and to store
   // them into the newly cloned array.
   for (int i = 0; i < length; i++) {
     Expression* subexpr = subexprs->at(i);
@@ skipping 2809 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64