Unify and simplify the FastCloneShallowArrayStub

src/arm64/full-codegen-arm64.cc

Index: src/arm64/full-codegen-arm64.cc
diff --git a/src/arm64/full-codegen-arm64.cc b/src/arm64/full-codegen-arm64.cc
index 76bb1b54e7a859137f2489d0838e43f737d851ab..96b93d22ab9eaeb58daf814a64587c95224072dd 100644
--- a/src/arm64/full-codegen-arm64.cc
+++ b/src/arm64/full-codegen-arm64.cc
@@ -1817,31 +1817,12 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
   __ Ldr(x3, FieldMemOperand(x3, JSFunction::kLiteralsOffset));
   __ Mov(x2, Smi::FromInt(expr->literal_index()));
   __ Mov(x1, Operand(constant_elements));
-  if (has_fast_elements && constant_elements_values->map() ==
-      isolate()->heap()->fixed_cow_array_map()) {
-    FastCloneShallowArrayStub stub(
-        FastCloneShallowArrayStub::COPY_ON_WRITE_ELEMENTS,
-        allocation_site_mode,
-        length);
-    __ CallStub(&stub);
-    __ IncrementCounter(
-        isolate()->counters()->cow_arrays_created_stub(), 1, x10, x11);
-  } else if ((expr->depth() > 1) || Serializer::enabled() ||
-             length > FastCloneShallowArrayStub::kMaximumClonedLength) {
+  if (expr->depth() > 1) {
     __ Mov(x0, Smi::FromInt(flags));
     __ Push(x3, x2, x1, x0);
     __ CallRuntime(Runtime::kHiddenCreateArrayLiteral, 4);
   } else {
-    ASSERT(IsFastSmiOrObjectElementsKind(constant_elements_kind) ||
-           FLAG_smi_only_arrays);
-    FastCloneShallowArrayStub::Mode mode =
-        FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS;
-
-    if (has_fast_elements) {
-      mode = FastCloneShallowArrayStub::CLONE_ELEMENTS;
-    }
-
-    FastCloneShallowArrayStub stub(mode, allocation_site_mode, length);
+    FastCloneShallowArrayStub stub(allocation_site_mode);
     __ CallStub(&stub);
   }