Create literal boilerplate as part of cloning in the top-level compiler....

src/x64/fast-codegen-x64.cc

Index: src/x64/fast-codegen-x64.cc
===================================================================
--- src/x64/fast-codegen-x64.cc	(revision 3430)
+++ src/x64/fast-codegen-x64.cc	(working copy)
@@ -663,31 +663,14 @@
 
 void FastCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
   Comment cmnt(masm_, "[ ObjectLiteral");
-  Label boilerplate_exists;
-
   __ movq(rdi, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
-  __ movq(rbx, FieldOperand(rdi, JSFunction::kLiteralsOffset));
-  int literal_offset =
-    FixedArray::kHeaderSize + expr->literal_index() * kPointerSize;
-  __ movq(rax, FieldOperand(rbx, literal_offset));
-  __ CompareRoot(rax, Heap::kUndefinedValueRootIndex);
-  __ j(not_equal, &boilerplate_exists);
-  // Create boilerplate if it does not exist.
-  // Literal array (0).
-  __ push(rbx);
-  // Literal index (1).
+  __ push(FieldOperand(rdi, JSFunction::kLiteralsOffset));
   __ Push(Smi::FromInt(expr->literal_index()));
-  // Constant properties (2).
   __ Push(expr->constant_properties());
-  __ CallRuntime(Runtime::kCreateObjectLiteralBoilerplate, 3);
-  __ bind(&boilerplate_exists);
-  // rax contains boilerplate.
-  // Clone boilerplate.
-  __ push(rax);
-  if (expr->depth() == 1) {
-    __ CallRuntime(Runtime::kCloneShallowLiteralBoilerplate, 1);
+  if (expr->depth() > 1) {
+    __ CallRuntime(Runtime::kCreateObjectLiteral, 3);
   } else {
-    __ CallRuntime(Runtime::kCloneLiteralBoilerplate, 1);
+    __ CallRuntime(Runtime::kCreateObjectLiteralShallow, 3);
   }
 
   // If result_saved == true: The result is saved on top of the
@@ -783,31 +766,14 @@
 
 void FastCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
   Comment cmnt(masm_, "[ ArrayLiteral");
-  Label make_clone;
-
-  // Fetch the function's literals array.
   __ movq(rbx, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
-  __ movq(rbx, FieldOperand(rbx, JSFunction::kLiteralsOffset));
-  // Check if the literal's boilerplate has been instantiated.
-  int offset =
-      FixedArray::kHeaderSize + (expr->literal_index() * kPointerSize);
-  __ movq(rax, FieldOperand(rbx, offset));
-  __ CompareRoot(rax, Heap::kUndefinedValueRootIndex);
-  __ j(not_equal, &make_clone);
-
-  // Instantiate the boilerplate.
-  __ push(rbx);
+  __ push(FieldOperand(rbx, JSFunction::kLiteralsOffset));
   __ Push(Smi::FromInt(expr->literal_index()));
   __ Push(expr->literals());
-  __ CallRuntime(Runtime::kCreateArrayLiteralBoilerplate, 3);
-
-  __ bind(&make_clone);
-  // Clone the boilerplate.
-  __ push(rax);
   if (expr->depth() > 1) {
-    __ CallRuntime(Runtime::kCloneLiteralBoilerplate, 1);
+    __ CallRuntime(Runtime::kCreateArrayLiteral, 3);
   } else {
-    __ CallRuntime(Runtime::kCloneShallowLiteralBoilerplate, 1);
+    __ CallRuntime(Runtime::kCreateArrayLiteralShallow, 3);
   }
 
   bool result_saved = false;  // Is the result saved to the stack?