Introduce a code stub version of Array.prototype.push

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index ec83da404ea2d0b1653385ba9fea66f9554e73a7..4d1cc7757af486f998eb6b50deaff967882901f1 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -85,6 +85,10 @@ void InternalArrayNoArgumentConstructorStub::InitializeDescriptor(
   InitializeInternalArrayConstructorDescriptor(isolate(), descriptor, 0);
 }
 
+void FastArrayPushStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
+  Address deopt_handler = Runtime::FunctionForId(Runtime::kArrayPush)->entry;
+  descriptor->Initialize(eax, deopt_handler, -1, JS_FUNCTION_STUB_MODE);
+}
 
 void InternalArraySingleArgumentConstructorStub::InitializeDescriptor(
     CodeStubDescriptor* descriptor) {