[runtime] Object.create(null) creates a slow object

src/compiler/code-assembler.cc

Index: src/compiler/code-assembler.cc
diff --git a/src/compiler/code-assembler.cc b/src/compiler/code-assembler.cc
index f9117557fbaea15ffdfe629b76dfd6d0709b319c..513225da04895791181a7a7eff31531e8c8395ec 100644
--- a/src/compiler/code-assembler.cc
+++ b/src/compiler/code-assembler.cc
@@ -110,6 +110,10 @@ Node* CodeAssembler::SmiConstant(Smi* value) {
   return BitcastWordToTaggedSigned(IntPtrConstant(bit_cast<intptr_t>(value)));
 }
 
+Node* CodeAssembler::SmiConstant(int value) {
+  return SmiConstant(Smi::FromInt(value));
+}
+
 Node* CodeAssembler::HeapConstant(Handle<HeapObject> object) {
   return raw_assembler_->HeapConstant(object);
 }