Supporting AllocationSiteInfo for Nested arrays

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 04c3e6837b05fe3853fc2888c8af71ce6feb4df7..aaab53a30961e6790c168696eb5f08641d782847 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -530,7 +530,15 @@ void FastCloneShallowArrayStub::Generate(MacroAssembler* masm) {
   __ ret(3 * kPointerSize);
 
   __ bind(&slow_case);
-  __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1);
+
+  // Add a flags argument, carefully preserving the return address on the stack.
+  int flags = allocation_site_mode_ == TRACK_ALLOCATION_SITE
+      ? ArrayLiteral::kCreateAllocationSiteInfos
+      : ArrayLiteral::kNoFlags;
+  __ pop(rcx);
+  __ Push(Smi::FromInt(flags));
+  __ push(rcx);
+  __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 4, 1);
 }