Fix usage of literal cloning for large double arrays.

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index c97ba3db2d59ed3458505b1f359f3e8432db8a34..a7b68a0aacf99ad6674a52bfbe33d5772b88b380 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -2724,6 +2724,12 @@ void FastCloneRegExpStub::GenerateAssembly(
       Generate(&assembler, closure, literal_index, pattern, flags, context));
 }
 
+// static
+bool FastCloneShallowArrayStub::IsSupported(ArrayLiteral* expr) {
+  return expr->depth() <= 1 &&
+         expr->values()->length() <= kMaximumClonedElements;

[Camillo Bruni, 2016/12/14 10:59:08]

How about putting this on the ArrayLiteral node instead?

[Michael Starzinger, 2016/12/14 14:01:03]

Done. Good idea, applied it to ArrayLiteral as well as to ObjectLiteral.

+}
+
 namespace {
 
 compiler::Node* NonEmptyShallowClone(CodeStubAssembler* assembler,