Implement code stub for object literal creation.

src/x64/lithium-codegen-x64.cc

 // Copyright 2011 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 3909 matching lines @@
         constant_elements_kind == FAST_DOUBLE_ELEMENTS
         ? FastCloneShallowArrayStub::CLONE_DOUBLE_ELEMENTS
         : FastCloneShallowArrayStub::CLONE_ELEMENTS;
     FastCloneShallowArrayStub stub(mode, length);
     CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
   }
 }
 
 
 void LCodeGen::DoObjectLiteral(LObjectLiteral* instr) {
+  Handle<FixedArray> constant_properties =
+      instr->hydrogen()->constant_properties();
+
   // Setup the parameters to the stub/runtime call.
   __ movq(rax, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
   __ push(FieldOperand(rax, JSFunction::kLiteralsOffset));
   __ Push(Smi::FromInt(instr->hydrogen()->literal_index()));
-  __ Push(instr->hydrogen()->constant_properties());
-  __ Push(Smi::FromInt(instr->hydrogen()->fast_elements() ? 1 : 0));
+  __ Push(constant_properties);
+  int flags = instr->hydrogen()->fast_elements()
+      ? ObjectLiteral::kFastElements
+      : ObjectLiteral::kNoFlags;
+  flags |= instr->hydrogen()->has_function()
+      ? ObjectLiteral::kHasFunction
+      : ObjectLiteral::kNoFlags;
+  __ Push(Smi::FromInt(flags));
 
   // Pick the right runtime function to call.
+  int properties_count = constant_properties->length() / 2;
   if (instr->hydrogen()->depth() > 1) {
     CallRuntime(Runtime::kCreateObjectLiteral, 4, instr);
+  } else if (flags != ObjectLiteral::kFastElements ||
+      properties_count > FastCloneShallowObjectStub::kMaximumClonedProperties) {
+    CallRuntime(Runtime::kCreateObjectLiteralShallow, 4, instr);
   } else {
-    CallRuntime(Runtime::kCreateObjectLiteralShallow, 4, instr);
+    FastCloneShallowObjectStub stub(properties_count);
+    CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
   }
 }
 
 
 void LCodeGen::DoToFastProperties(LToFastProperties* instr) {
   ASSERT(ToRegister(instr->InputAt(0)).is(rax));
   __ push(rax);
   CallRuntime(Runtime::kToFastProperties, 1, instr);
 }
 
@@ skipping 335 matching lines @@
   RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt);
   ASSERT(osr_pc_offset_ == -1);
   osr_pc_offset_ = masm()->pc_offset();
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64