Improve FastCloneShallowArray/ObjectStubs with VFP copying on ARM

src/x64/code-stubs-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 282 matching lines @@
   // Return and remove the on-stack parameter.
   __ movq(rsi, rax);
   __ ret(2 * kPointerSize);
 
   // Need to collect. Call into runtime system.
   __ bind(&gc);
   __ TailCallRuntime(Runtime::kPushBlockContext, 2, 1);
 }
 
 
+int FastCloneShallowArrayStub::MaximumClonedLength() {
+  return 8;
+}
+
+
 static void GenerateFastCloneShallowArrayCommon(
     MacroAssembler* masm,
     int length,
     FastCloneShallowArrayStub::Mode mode,
     Label* fail) {
   // Registers on entry:
   //
   // rcx: boilerplate literal array.
   ASSERT(mode != FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS);
 
@@ skipping 115 matching lines @@
   }
 
   GenerateFastCloneShallowArrayCommon(masm, length_, mode, &slow_case);
   __ ret(3 * kPointerSize);
 
   __ bind(&slow_case);
   __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1);
 }
 
 
+int FastCloneShallowObjectStub::MaximumClonedProperties() {
+  return 6;
+}
+
+
 void FastCloneShallowObjectStub::Generate(MacroAssembler* masm) {
   // Stack layout on entry:
   //
   // [rsp + kPointerSize]: object literal flags.
   // [rsp + (2 * kPointerSize)]: constant properties.
   // [rsp + (3 * kPointerSize)]: literal index.
   // [rsp + (4 * kPointerSize)]: literals array.
 
   // Load boilerplate object into ecx and check if we need to create a
   // boilerplate.
@@ skipping 6034 matching lines @@
 #endif
 
   __ Ret();
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64